# Users Detail

A user directory with a list beside a detail pane showing profile, sessions and security for the selected user.

Users Detail is an open-source mobile screen from suiss/uim for React Native and Expo, with SwiftUI and Jetpack Compose versions built from the same design tokens. The @esuiss/uim CLI copies its source into your project, so you own the code.

Source: https://uim.suiss.app/docs/blocks/users-detail

![Preview](https://uim.suiss.app/previews/blocks-users-detail--default.light.webp)

```tsx title="uniwind/components/blocks/users-detail.tsx"
import {
  ChartBarIcon,
  DesktopIcon,
  DeviceMobileIcon,
  GearIcon,
  GlobeIcon,
  type Icon as PhosphorIcon,
  ShieldIcon,
  UsersIcon,
} from "phosphor-react-native"
import * as React from "react"
import { useWindowDimensions, View } from "react-native"
import { FadeInDown, ReduceMotion } from "react-native-reanimated"
import { Picker, PickerItem } from "@/components/patterns/picker"
import {
  SplitView,
  SplitViewDetail,
  SplitViewItem,
  SplitViewList,
} from "@/components/patterns/split-view"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import {
  Item,
  ItemActions,
  ItemContent,
  ItemDescription,
  ItemGroup,
  ItemMedia,
  ItemSeparator,
  ItemTitle,
} from "@/components/ui/item"
import { Screen } from "@/components/ui/screen"
import { Switch } from "@/components/ui/switch"
import { TabBar, TabBarItem, TabBarList } from "@/components/ui/tab-bar"
import { Text } from "@/components/ui/text"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

const SECTIONS: { value: string; label: string; icon: PhosphorIcon }[] = [
  { value: "users", label: "Users", icon: UsersIcon },
  { value: "roles", label: "Roles", icon: ShieldIcon },
  { value: "log", label: "Activity", icon: ChartBarIcon },
  { value: "settings", label: "Settings", icon: GearIcon },
]

const ROLES = ["Admin", "Editor", "Support", "Viewer"]

const TABS = ["Profile", "Sessions", "Security"]

type User = {
  name: string
  email: string
  role: string
  status: string
  tint: string
}

const USERS: User[] = [
  {
    name: "Jamie Rivera",
    email: "jamie@company.com",
    role: "Admin",
    status: "Active",
    tint: "bg-indigo dark:bg-indigo",
  },
  {
    name: "Morgan Lee",
    email: "morgan@company.com",
    role: "Editor",
    status: "Active",
    tint: "bg-orange dark:bg-orange",
  },
  {
    name: "Riley Chen",
    email: "riley@company.com",
    role: "Support",
    status: "Active",
    tint: "bg-green dark:bg-green",
  },
  {
    name: "Taylor Kim",
    email: "taylor@company.com",
    role: "Viewer",
    status: "Suspended",
    tint: "bg-cyan dark:bg-cyan",
  },
  {
    name: "Avery Brooks",
    email: "avery@company.com",
    role: "Editor",
    status: "Invited",
    tint: "bg-pink dark:bg-pink",
  },
  {
    name: "Jordan Park",
    email: "jordan@company.com",
    role: "Support",
    status: "Active",
    tint: "bg-mint dark:bg-mint",
  },
]

type Session = {
  device: string
  place: string
  time: string
  icon: PhosphorIcon
}

const INITIAL_SESSIONS: Session[] = [
  {
    device: "Book Pro · Browser",
    place: "San Francisco, US",
    time: "Now",
    icon: DesktopIcon,
  },
  {
    device: "Phone Pro · App",
    place: "San Francisco, US",
    time: "2 hr ago",
    icon: DeviceMobileIcon,
  },
  {
    device: "Desktop · Browser",
    place: "Seattle, US",
    time: "3 days ago",
    icon: GlobeIcon,
  },
]

const SECURITY = [
  { label: "Two-factor authentication", initial: true },
  { label: "Require passkey", initial: false },
  { label: "Sign-in alerts", initial: true },
]

const initials = (name: string) =>
  name
    .split(" ")
    .map((part) => part[0])
    .join("")

function AdminTabBar({
  value,
  onValueChange,
}: {
  value: string
  onValueChange: (value: string) => void
}) {
  return (
    <TabBar value={value} onValueChange={(next) => onValueChange(next)}>
      <TabBarList>
        {SECTIONS.map((section) => (
          <TabBarItem
            key={section.value}
            value={section.value}
            icon={section.icon}
          >
            {section.label}
          </TabBarItem>
        ))}
      </TabBarList>
    </TabBar>
  )
}

function OtherSection({ value, home }: { value: string; home: string }) {
  const label = SECTIONS.find((section) => section.value === value)?.label
  return (
    <View className="flex-1 gap-2 px-4 pt-13">
      <Text role="heading" className="text-3xl font-bold">
        {label}
      </Text>
      <Text className="text-lg text-label-secondary">
        {`This section isn't part of the sample. Choose ${home}.`}
      </Text>
    </View>
  )
}

function UserAvatar({
  user,
  size,
  className,
}: {
  user: User
  size: "sm" | "xl"
  className?: string
}) {
  return (
    <Avatar size={size} className={className}>
      <AvatarFallback className={user.tint}>
        {initials(user.name)}
      </AvatarFallback>
    </Avatar>
  )
}

function SecurityToggle({
  label,
  initial,
  onChange,
}: {
  label: string
  initial: boolean
  onChange: (enabled: boolean) => void
}) {
  const [on, setOn] = React.useState(initial)
  const id = `users-detail-${label.toLowerCase().replaceAll(" ", "-")}`

  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle nativeID={id} className="font-normal">
          {label}
        </ItemTitle>
      </ItemContent>
      <ItemActions>
        <Switch
          checked={on}
          onCheckedChange={(value) => {
            setOn(value)
            onChange(value)
          }}
          accessibilityLabelledBy={id}
        />
      </ItemActions>
    </Item>
  )
}

function ValueRow({ label, value }: { label: string; value: string }) {
  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle className="font-normal">{label}</ItemTitle>
      </ItemContent>
      <ItemActions className="shrink">
        <Text numberOfLines={1}>{value}</Text>
      </ItemActions>
    </Item>
  )
}

function UsersDetail({
  onRoleChange,
  onSignOut,
  onSignOutAll,
  onSecurityChange,
  onSendPasswordReset,
  onNavigate,
}: {
  onRoleChange?: (email: string, role: string) => void
  onSignOut?: (device: string) => void
  onSignOutAll?: () => void
  onSecurityChange?: (email: string, setting: string, enabled: boolean) => void
  onSendPasswordReset?: (email: string) => void
  onNavigate?: (section: string) => void
}) {
  const { width } = useWindowDimensions()
  const wide = width >= 768
  const [section, setSection] = React.useState("users")
  const [selected, setSelected] = React.useState(0)
  const [tab, setTab] = React.useState("Profile")
  const [overrides, setOverrides] = React.useState<Record<number, string>>({})
  const [sessions, setSessions] = React.useState(INITIAL_SESSIONS)
  const user = USERS[selected] ?? USERS[0]
  if (!user) return null
  const role = overrides[selected] ?? user.role

  return (
    <Screen edges={["top", "right", "left"]}>
      {section === "users" ? (
        <SplitView className={wide ? "m-4" : undefined}>
          <SplitViewList
            title="Users"
            className={wide ? "gap-0.5 px-4 pt-5" : "px-4 pb-8"}
          >
            {wide ? (
              <Text
                role="heading"
                className="px-1 pb-2 text-sm font-semibold text-label-secondary"
              >
                Users
              </Text>
            ) : null}
            {USERS.map((item, index) => {
              const active = wide && index === selected
              return (
                <SplitViewItem
                  key={item.email}
                  isActive={index === selected}
                  onPress={() => {
                    setSelected(index)
                    setTab("Profile")
                  }}
                  className={active ? "bg-accent py-1.5" : "py-1.5"}
                >
                  <View className="flex-row items-center gap-2.5">
                    <UserAvatar user={item} size="sm" className="size-7" />
                    <View className="min-w-0 flex-1">
                      <Text
                        numberOfLines={1}
                        className={
                          active ? "text-sm text-on-accent" : "text-sm"
                        }
                      >
                        {item.name}
                      </Text>
                      <Text
                        className={
                          active
                            ? "text-xs text-on-accent"
                            : "text-xs text-label-secondary"
                        }
                      >
                        {overrides[index] ?? item.role}
                      </Text>
                    </View>
                  </View>
                </SplitViewItem>
              )
            })}
          </SplitViewList>
          <SplitViewDetail className={wide ? "p-6" : "px-4 pb-8"}>
            <AnimatedView
              key={selected}
              entering={FadeInDown.duration(800).reduceMotion(
                ReduceMotion.System
              )}
              className="gap-5"
            >
              <View className="flex-row items-center gap-3.5">
                <UserAvatar user={user} size="xl" />
                <View className="min-w-0 flex-1 gap-0.5">
                  <Text role="heading" className="text-2xl font-bold">
                    {user.name}
                  </Text>
                  <Text className="text-sm text-label-secondary">
                    {`${user.email} · ${role}`}
                  </Text>
                </View>
              </View>
              <ToggleGroup
                spacing={0}
                size="sm"
                value={[tab]}
                onValueChange={(value) => {
                  if (value[0]) setTab(value[0])
                }}
                accessibilityLabel="Section"
              >
                {TABS.map((item) => (
                  <ToggleGroupItem key={item} value={item} className="px-4">
                    <Text>{item}</Text>
                  </ToggleGroupItem>
                ))}
              </ToggleGroup>
              <AnimatedView
                key={tab}
                entering={FadeInDown.duration(700).reduceMotion(
                  ReduceMotion.System
                )}
                className="gap-3"
              >
                {tab === "Profile" ? (
                  <ItemGroup variant="inset">
                    {[
                      ["Full name", user.name],
                      ["Email", user.email],
                      ["Department", "Product"],
                      ["Joined", "March 12, 2024"],
                    ].map(([label = "", value = ""]) => (
                      <React.Fragment key={label}>
                        <ValueRow label={label} value={value} />
                        <ItemSeparator />
                      </React.Fragment>
                    ))}
                    <Item size="sm">
                      <ItemContent>
                        <ItemTitle className="font-normal">Role</ItemTitle>
                      </ItemContent>
                      <ItemActions>
                        <Picker
                          size="sm"
                          value={role}
                          onValueChange={(value) => {
                            onRoleChange?.(user.email, value)
                            setOverrides((current) => ({
                              ...current,
                              [selected]: value,
                            }))
                          }}
                          accessibilityLabel="Role"
                          className="bg-transparent px-1"
                        >
                          {ROLES.map((item) => (
                            <PickerItem key={item} value={item}>
                              {item}
                            </PickerItem>
                          ))}
                        </Picker>
                      </ItemActions>
                    </Item>
                    <ItemSeparator />
                    <ValueRow label="Status" value={user.status} />
                  </ItemGroup>
                ) : null}
                {tab === "Sessions" ? (
                  <>
                    <ItemGroup variant="inset">
                      {sessions.map((session, index) => (
                        <React.Fragment key={session.device}>
                          {index > 0 ? (
                            <ItemSeparator className="ms-15" />
                          ) : null}
                          <Item size="sm">
                            <ItemMedia className="size-7.5 rounded-[7px] bg-gray">
                              <Icon
                                as={session.icon}
                                weight="bold"
                                className="size-4 text-on-accent"
                              />
                            </ItemMedia>
                            <ItemContent className="gap-0">
                              <ItemTitle className="font-normal">
                                {session.device}
                              </ItemTitle>
                              <ItemDescription className="text-xs">
                                {`${session.place} · ${session.time}`}
                              </ItemDescription>
                            </ItemContent>
                            <ItemActions>
                              {index === 0 ? (
                                <Text className="text-sm text-label">
                                  This device
                                </Text>
                              ) : (
                                <Button
                                  size="sm"
                                  variant="secondary"
                                  onPress={() => {
                                    onSignOut?.(session.device)
                                    setSessions((current) =>
                                      current.filter(
                                        (item) => item.device !== session.device
                                      )
                                    )
                                  }}
                                >
                                  <Text>Sign Out</Text>
                                </Button>
                              )}
                            </ItemActions>
                          </Item>
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    {sessions.length > 1 ? (
                      <Button
                        size="sm"
                        variant="destructive"
                        className="self-start"
                        onPress={() => {
                          onSignOutAll?.()
                          setSessions((current) => current.slice(0, 1))
                        }}
                      >
                        <Text>Sign Out All Other Sessions</Text>
                      </Button>
                    ) : null}
                  </>
                ) : null}
                {tab === "Security" ? (
                  <>
                    <ItemGroup key={selected} variant="inset">
                      {SECURITY.map((setting, index) => (
                        <React.Fragment key={setting.label}>
                          {index > 0 ? <ItemSeparator /> : null}
                          <SecurityToggle
                            label={setting.label}
                            initial={setting.initial}
                            onChange={(enabled) =>
                              onSecurityChange?.(
                                user.email,
                                setting.label,
                                enabled
                              )
                            }
                          />
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    <Button
                      size="sm"
                      variant="destructive"
                      className="self-start"
                      onPress={() => onSendPasswordReset?.(user.email)}
                    >
                      <Text>Send Password Reset Link</Text>
                    </Button>
                  </>
                ) : null}
              </AnimatedView>
            </AnimatedView>
          </SplitViewDetail>
        </SplitView>
      ) : (
        <OtherSection value={section} home="Users" />
      )}
      <AdminTabBar
        value={section}
        onValueChange={(value) => {
          setSection(value)
          onNavigate?.(value)
        }}
      />
    </Screen>
  )
}

export { UsersDetail }
```

```swift title="swift/Blocks/UsersDetail.swift"
import PhosphorSwift
import SwiftUI

public struct UsersDetail: View {
  struct User: Identifiable {
    let name: String
    let email: String
    let role: String
    let status: String
    let tint: Color

    var id: String { email }
  }

  struct Session: Identifiable, Equatable {
    let device: String
    let place: String
    let time: String
    let icon: Image

    var id: String { device }
  }

  static let roles = ["Admin", "Editor", "Support", "Viewer"]
  static let tabs = ["Profile", "Sessions", "Security"]

  static var users: [User] {
    [
      User(name: "Jamie Rivera", email: "jamie@company.com", role: "Admin", status: "Active", tint: .indigo),
      User(name: "Morgan Lee", email: "morgan@company.com", role: "Editor", status: "Active", tint: .orange),
      User(name: "Riley Chen", email: "riley@company.com", role: "Support", status: "Active", tint: .green),
      User(name: "Taylor Kim", email: "taylor@company.com", role: "Viewer", status: "Suspended", tint: .blue),
      User(name: "Avery Brooks", email: "avery@company.com", role: "Editor", status: "Invited", tint: .pink),
      User(name: "Jordan Park", email: "jordan@company.com", role: "Support", status: "Active", tint: .mint),
    ]
  }

  static var initialSessions: [Session] {
    [
      Session(device: "Book Pro · Browser", place: "San Francisco, US", time: "Now", icon: Ph.desktop.bold),
      Session(device: "Phone Pro · App", place: "San Francisco, US", time: "2 hr ago", icon: Ph.deviceMobile.bold),
      Session(device: "Desktop · Browser", place: "Seattle, US", time: "3 days ago", icon: Ph.globe.bold),
    ]
  }

  static let security: [(label: LocalizedStringKey, key: String, initial: Bool)] = [
    ("Two-factor authentication", "twoFactor", true),
    ("Require passkey", "passkey", false),
    ("Sign-in alerts", "alerts", true),
  ]

  private var onNavigate: ((String) -> Void)?
  private var onRoleChange: ((String, String) -> Void)?
  private var onSignOut: ((String) -> Void)?
  private var onSignOutAll: (() -> Void)?
  private var onSecurityChange: ((String, String, Bool) -> Void)?
  private var onSendPasswordReset: ((String) -> Void)?
  @State private var selected: Int
  @State private var tab: String?
  @State private var overrides: [Int: String] = [:]
  @State private var sessions: [Session]
  @State private var settings: [Int: [String: Bool]] = [:]
  @State private var column: SplitViewColumn
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onRoleChange: ((_ user: String, _ role: String) -> Void)? = nil,
    onSignOut: ((_ device: String) -> Void)? = nil,
    onSignOutAll: (() -> Void)? = nil,
    onSecurityChange: ((_ user: String, _ setting: String, _ enabled: Bool) -> Void)? = nil,
    onSendPasswordReset: ((_ user: String) -> Void)? = nil,
    onNavigate: ((_ section: String) -> Void)? = nil
  ) {
    self.init(selected: 0)
    self.onRoleChange = onRoleChange
    self.onSignOut = onSignOut
    self.onSignOutAll = onSignOutAll
    self.onNavigate = onNavigate
    self.onSecurityChange = onSecurityChange
    self.onSendPasswordReset = onSendPasswordReset
  }

  init(selected: Int, tab: String = "Profile", column: SplitViewColumn = .list) {
    _selected = State(initialValue: selected)
    _tab = State(initialValue: tab)
    _column = State(initialValue: column)
    _sessions = State(initialValue: Self.initialSessions)
  }

  private var animation: Animation? {
    reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.45)
  }

  private func role(_ index: Int) -> String {
    overrides[index] ?? Self.users[index].role
  }

  public var body: some View {
    UsersDetailShell(home: "users", onNavigate: onNavigate) {
      page
    }
  }

  @ViewBuilder private var page: some View {
    let user = Self.users[selected]
    Screen {
      SplitView(column: $column) {
        SplitViewList("Users") {
          VStack(alignment: .leading, spacing: 0) {
            UsersDetailHeading()
            ForEach(Array(Self.users.enumerated()), id: \.element.id) { index, item in
              SplitViewItem(isActive: index == selected, action: {
                selected = index
                tab = "Profile"
              }) {
                HStack(spacing: 10) {
                  UsersDetailAvatar(user: item, size: 32)
                  VStack(alignment: .leading, spacing: 0) {
                    Text(verbatim: item.name)
                      .scaledFont(.sm)
                    Text(LocalizedStringKey(role(index)))
                      .scaledFont(.xs)
                      .foregroundStyle(Color.labelSecondary)
                  }
                }
                .accessibilityElement(children: .combine)
              }
            }
          }
        }
        SplitViewDetail {
          detail(user)
            .id(selected)
            .transition(.opacity.combined(with: .offset(y: 8)))
        }
      }
    }
  }

  private func detail(_ user: User) -> some View {
    let current = tab ?? "Profile"
    return VStack(alignment: .leading, spacing: 20) {
      HStack(spacing: 14) {
        UsersDetailAvatar(user: user, size: 64)
        VStack(alignment: .leading, spacing: 2) {
          Text(verbatim: user.name)
            .scaledTextStyle(.xl2, weight: .bold)
            .accessibilityAddTraits(.isHeader)
          Text(verbatim: "\(user.email) · \(role(selected))")
            .scaledFont(.sm)
            .foregroundStyle(Color.labelSecondary)
        }
      }
      .padding(.top, 8)
      ToggleGroup(
        selection: Binding<String?>(
          get: { tab },
          set: { value in
            guard let value else { return }
            withAnimation(animation) { tab = value }
          }
        ),
        size: .sm,
        spacing: 0
      ) {
        ForEach(Self.tabs, id: \.self) { item in
          ToggleGroupItem(LocalizedStringKey(item), value: item)
            .frame(maxWidth: .infinity)
        }
      }
      .accessibilityLabel(Text("Section"))
      Group {
        switch current {
        case "Sessions": sessionsTab(user)
        case "Security": securityTab(user)
        default: profileTab(user)
        }
      }
      .id(current)
      .transition(.opacity.combined(with: .offset(y: 6)))
    }
    .foregroundStyle(Color.label)
  }

  private func profileTab(_ user: User) -> some View {
    let rows: [(LocalizedStringKey, String)] = [
      ("Full name", user.name),
      ("Email", user.email),
      ("Department", "Product"),
      ("Joined", "March 12, 2024"),
    ]
    let index = selected
    let binding = Binding<String?>(
      get: { role(index) },
      set: { value in
        guard let value, value != role(index) else { return }
        onRoleChange?(user.email, value)
        overrides[index] = value
      }
    )
    return ItemGroup(.inset) {
      ForEach(Array(rows.enumerated()), id: \.offset) { _, row in
        Item(size: .sm) {
          ItemContent {
            ItemTitle { Text(row.0).fontWeight(.regular) }
          }
          ItemActions {
            Text(verbatim: row.1)
              .foregroundStyle(Color.labelSecondary)
              .lineLimit(1)
          }
        }
        .accessibilityElement(children: .combine)
        ItemSeparator()
      }
      Item(size: .sm) {
        ItemContent {
          ItemTitle { Text("Role").fontWeight(.regular) }
        }
        ItemActions {
          OptionPicker(selection: binding, size: .sm) {
            ForEach(Self.roles, id: \.self) { item in
              OptionPickerItem(LocalizedStringKey(item), value: item)
            }
          }
          .fixedSize()
          .accessibilityLabel(Text("Role"))
        }
      }
      ItemSeparator()
      Item(size: .sm) {
        ItemContent {
          ItemTitle { Text("Status").fontWeight(.regular) }
        }
        ItemActions {
          Text(LocalizedStringKey(user.status))
            .foregroundStyle(Color.labelSecondary)
        }
      }
      .accessibilityElement(children: .combine)
    }
  }

  private func sessionsTab(_ user: User) -> some View {
    VStack(alignment: .leading, spacing: 12) {
      ItemGroup(.inset) {
        ForEach(Array(sessions.enumerated()), id: \.element.id) { index, session in
          if index > 0 {
            ItemSeparator().padding(.leading, 44)
          }
          Item(size: .sm) {
            ItemMedia {
              session.icon
                .frame(width: 16, height: 16)
                .foregroundStyle(Color.onAccent)
                .frame(width: 30, height: 30)
                .background(Color.gray, in: RoundedRectangle(cornerRadius: 7, style: .continuous))
            }
            ItemContent {
              ItemTitle { Text(verbatim: session.device).fontWeight(.regular) }
              ItemDescription(verbatim: "\(session.place) · \(session.time)")
            }
            ItemActions {
              if index == 0 {
                Text("This device")
                  .scaledFont(.sm)
              } else {
                Button("Sign Out") {
                  onSignOut?(session.device)
                  withAnimation(animation) { sessions.removeAll { $0.device == session.device } }
                }
                .buttonStyle(.variant(.secondary, size: .sm))
              }
            }
          }
          .transition(.opacity)
        }
      }
      if sessions.count > 1 {
        Button("Sign Out All Other Sessions") {
          onSignOutAll?()
          withAnimation(animation) { sessions = Array(sessions.prefix(1)) }
        }
        .buttonStyle(.variant(.destructive, size: .sm))
      }
    }
  }

  private func securityTab(_ user: User) -> some View {
    let index = selected
    return VStack(alignment: .leading, spacing: 12) {
      ItemGroup(.inset) {
        ForEach(Array(Self.security.enumerated()), id: \.offset) { position, item in
          if position > 0 {
            ItemSeparator()
          }
          Item(size: .sm) {
            ItemContent {
              ItemTitle { Text(item.label).fontWeight(.regular) }
            }
            ItemActions {
              Toggle(isOn: Binding(
                get: { settings[index]?[item.key] ?? item.initial },
                set: { value in
                  onSecurityChange?(user.email, item.key, value)
                  settings[index, default: [:]][item.key] = value
                }
              )) {
                Text(item.label)
              }
              .labelsHidden()
              .toggleStyle(SwitchStyle())
              .accessibilityLabel(Text(item.label))
            }
          }
        }
      }
      Button("Send Password Reset Link") {
        onSendPasswordReset?(user.email)
      }
      .buttonStyle(.variant(.destructive, size: .sm))
    }
  }
}

private struct UsersDetailAvatar: View {
  let user: UsersDetail.User
  let size: CGFloat

  var body: some View {
    Text(verbatim: user.name.split(separator: " ").compactMap(\.first).map(String.init).joined())
      .font(.system(size: size * 0.38, weight: .semibold))
      .foregroundStyle(Color.onAccent)
      .frame(width: size, height: size)
      .background(user.tint, in: Circle())
      .accessibilityHidden(true)
  }
}

private struct UsersDetailHeading: View {
  @Environment(\.splitView) private var splitView

  var body: some View {
    if splitView?.wide ?? false {
      Text("Users")
        .scaledFont(.sm, weight: .semibold)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 4)
        .padding(.vertical, 8)
        .accessibilityAddTraits(.isHeader)
    }
  }
}

private struct UsersDetailShell<Content: View>: View {
  let home: String
  let onNavigate: ((String) -> Void)?
  let content: Content

  @State private var tab: String

  init(home: String, onNavigate: ((String) -> Void)?, @ViewBuilder content: () -> Content) {
    self.home = home
    self.onNavigate = onNavigate
    self.content = content()
    _tab = State(initialValue: home)
  }

  private static var sections: [(value: String, label: LocalizedStringKey, icon: Image, active: Image)] {
    [
      ("users", "Users", Ph.users.regular, Ph.users.fill),
      ("roles", "Roles", Ph.shield.regular, Ph.shield.fill),
      ("log", "Activity", Ph.chartBar.regular, Ph.chartBar.fill),
      ("settings", "Settings", Ph.gear.regular, Ph.gear.fill),
    ]
  }

  var body: some View {
    let selection = Binding<String>(
      get: { tab },
      set: { value in
        guard value != tab else { return }
        onNavigate?(value)
        tab = value
      }
    )
    Screen {
      ZStack {
        content
          .opacity(tab == home ? 1 : 0)
          .allowsHitTesting(tab == home)
          .accessibilityHidden(tab != home)
        if tab != home {
          Empty {
            EmptyHeader {
              EmptyDescription("This section isn't part of the sample. Choose \(Text(Self.sections.first { $0.value == home }?.label ?? "")).")
            }
          }
          .background(Color.surface)
        }
      }
      .frame(maxHeight: .infinity)
      TabBar(selection: selection) {
        ForEach(Self.sections, id: \.value) { section in
          TabBarItem(section.label, value: section.value, icon: section.icon, activeIcon: section.active)
        }
      }
    }
  }
}
```

```kt title="kotlin/blocks/UsersDetail.kt"
package com.esuiss.ui.blocks

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.key
import androidx.compose.runtime.mutableStateListOf
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.Fill
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.bold.Desktop
import com.adamglin.phosphoricons.bold.DeviceMobile
import com.adamglin.phosphoricons.bold.Globe
import com.adamglin.phosphoricons.fill.ChartBar as FillChartBar
import com.adamglin.phosphoricons.fill.Gear as FillGear
import com.adamglin.phosphoricons.fill.Shield as FillShield
import com.adamglin.phosphoricons.fill.Users as FillUsers
import com.adamglin.phosphoricons.regular.ChartBar
import com.adamglin.phosphoricons.regular.Gear
import com.adamglin.phosphoricons.regular.Shield
import com.adamglin.phosphoricons.regular.Users
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Item
import com.esuiss.ui.components.ItemActions
import com.esuiss.ui.components.ItemContent
import com.esuiss.ui.components.ItemGroup
import com.esuiss.ui.components.ItemGroupVariant
import com.esuiss.ui.components.ItemMedia
import com.esuiss.ui.components.ItemSeparator
import com.esuiss.ui.components.ItemSize
import com.esuiss.ui.components.ItemTitle
import com.esuiss.ui.components.Screen
import com.esuiss.ui.components.ScreenEdge
import com.esuiss.ui.components.SelectSize
import com.esuiss.ui.components.Switch
import com.esuiss.ui.components.TabBar
import com.esuiss.ui.components.TabBarItem
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.patterns.Picker
import com.esuiss.ui.patterns.PickerItemData
import com.esuiss.ui.patterns.SplitView
import com.esuiss.ui.patterns.SplitViewColumn
import com.esuiss.ui.patterns.SplitViewItem
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

private val DetailRevealEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

private class DetailUser(val name: String, val email: String, val role: String, val status: String, val hue: Int)

private val DetailUsers = listOf(
    DetailUser("Jamie Rivera", "jamie@company.com", "Admin", "Active", 250),
    DetailUser("Morgan Lee", "morgan@company.com", "Editor", "Active", 30),
    DetailUser("Riley Chen", "riley@company.com", "Support", "Active", 150),
    DetailUser("Taylor Kim", "taylor@company.com", "Viewer", "Suspended", 200),
    DetailUser("Avery Brooks", "avery@company.com", "Editor", "Invited", 330),
    DetailUser("Jordan Park", "jordan@company.com", "Support", "Active", 100),
)

private val DetailRoles = listOf("Admin", "Editor", "Support", "Viewer").map { PickerItemData(it, it) }

private class DetailSession(val device: String, val place: String, val time: String, val icon: ImageVector)

private fun detailSessions() = listOf(
    DetailSession("Book Pro · Browser", "San Francisco, US", "Now", PhosphorIcons.Bold.Desktop),
    DetailSession("Phone Pro · App", "San Francisco, US", "2 hr ago", PhosphorIcons.Bold.DeviceMobile),
    DetailSession("Desktop · Browser", "Seattle, US", "3 days ago", PhosphorIcons.Bold.Globe),
)

private val DetailSecurity = listOf(
    "Two-factor authentication" to true,
    "Require passkey" to false,
    "Sign-in alerts" to true,
)

private fun detailTint(colors: Colors, hue: Int): Color = when (hue) {
    250 -> colors.indigo
    30 -> colors.orange
    150 -> colors.green
    200 -> colors.blue
    330 -> colors.pink
    else -> colors.teal
}

@Composable
fun UsersDetail(
    modifier: Modifier = Modifier,
    onRoleChange: (email: String, role: String) -> Unit = { _, _ -> },
    onSignOut: (device: String) -> Unit = {},
    onSignOutAll: () -> Unit = {},
    onSecurityChange: (email: String, setting: String, enabled: Boolean) -> Unit = { _, _, _ -> },
    onSendPasswordReset: (email: String) -> Unit = {},
    onNavigate: (section: String) -> Unit = {},
) {
    val colors = EsuissTheme.colors
    var selected by rememberSaveable { mutableStateOf(0) }
    var tab by rememberSaveable { mutableStateOf("Profile") }
    var column by rememberSaveable { mutableStateOf(SplitViewColumn.List) }
    val overrides = remember { mutableStateMapOf<Int, String>() }
    val security = remember { mutableStateMapOf<String, Boolean>() }
    val sessions = remember { mutableStateListOf<DetailSession>().apply { addAll(detailSessions()) } }
    val user = DetailUsers[selected]
    val role = overrides[selected] ?: user.role

    Screen(modifier, edges = setOf(ScreenEdge.Top, ScreenEdge.Left, ScreenEdge.Right)) {
        AdminTabs("users", onNavigate) {
            SplitView(column = column, onColumnChange = { column = it }) {
                SplitViewList(title = "Users") {
                    DetailUsers.forEachIndexed { index, item ->
                        SplitViewItem(
                            isActive = index == selected,
                            onClick = {
                                selected = index
                                tab = "Profile"
                            },
                        ) {
                            Row(horizontalArrangement = Arrangement.spacedBy(10.dp), verticalAlignment = Alignment.CenterVertically) {
                                DetailAvatar(item, 28.dp)
                                Column {
                                    BasicText(item.name, style = Typography.sm.copy(color = colors.label))
                                    BasicText(overrides[index] ?: item.role, style = Typography.xs.copy(color = colors.labelSecondary))
                                }
                            }
                        }
                    }
                }
                SplitViewDetail {
                    key(selected) {
                        DetailAppear {
                            Column(
                                modifier = Modifier.padding(top = 8.dp),
                                verticalArrangement = Arrangement.spacedBy(20.dp),
                            ) {
                                Row(horizontalArrangement = Arrangement.spacedBy(14.dp), verticalAlignment = Alignment.CenterVertically) {
                                    DetailAvatar(user, 64.dp)
                                    Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
                                        BasicText(
                                            user.name,
                                            modifier = Modifier.semantics { heading() },
                                            style = Typography.xl.copy(color = colors.label, fontWeight = FontWeight.Bold),
                                        )
                                        BasicText("${user.email} · $role", style = Typography.sm.copy(color = colors.labelSecondary))
                                    }
                                }
                                ToggleGroup(
                                    value = tab,
                                    onValueChange = { if (it != null) tab = it },
                                    modifier = Modifier.semantics { contentDescription = "Section" },
                                    size = ToggleSize.Sm,
                                    spacing = 0,
                                ) {
                                    listOf("Profile", "Sessions", "Security").forEach { ToggleGroupItem(it, it) }
                                }
                                key(tab) {
                                    DetailAppear {
                                        Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
                                            when (tab) {
                                                "Profile" -> DetailProfile(user, role) { value ->
                                                    onRoleChange(user.email, value)
                                                    overrides[selected] = value
                                                }
                                                "Sessions" -> DetailSessions(
                                                    sessions = sessions,
                                                    onSignOut = { session ->
                                                        onSignOut(session.device)
                                                        sessions.remove(session)
                                                    },
                                                    onSignOutAll = {
                                                        onSignOutAll()
                                                        while (sessions.size > 1) sessions.removeAt(sessions.lastIndex)
                                                    },
                                                )
                                                else -> {
                                                    ItemGroup(variant = ItemGroupVariant.Inset) {
                                                        DetailSecurity.forEachIndexed { index, (label, initial) ->
                                                            if (index > 0) ItemSeparator()
                                                            val keyName = "$selected-$label"
                                                            DetailRow(label) {
                                                                Switch(
                                                                    checked = security[keyName] ?: initial,
                                                                    onCheckedChange = {
                                                                        onSecurityChange(user.email, label, it)
                                                                        security[keyName] = it
                                                                    },
                                                                    modifier = Modifier.semantics { contentDescription = label },
                                                                )
                                                            }
                                                        }
                                                    }
                                                    Button(
                                                        text = "Send Password Reset Link",
                                                        onClick = { onSendPasswordReset(user.email) },
                                                        size = ButtonSize.Sm,
                                                        variant = ButtonVariant.Destructive,
                                                    )
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

@Composable
private fun DetailAppear(content: @Composable () -> Unit) {
    val appear = remember { Animatable(0f) }
    LaunchedEffect(Unit) { appear.animateTo(1f, tween(800, easing = DetailRevealEasing)) }
    Box(
        Modifier.graphicsLayer {
            alpha = appear.value
            translationY = (1f - appear.value) * 8.dp.toPx()
        },
    ) {
        content()
    }
}

@Composable
private fun DetailAvatar(user: DetailUser, size: Dp) {
    val colors = EsuissTheme.colors
    Box(
        Modifier
            .size(size)
            .background(detailTint(colors, user.hue), CircleShape),
        contentAlignment = Alignment.Center,
    ) {
        BasicText(
            user.name.split(" ").mapNotNull { it.firstOrNull() }.joinToString(""),
            style = Typography.xs.copy(color = colors.onMedia, fontWeight = FontWeight.Medium, fontSize = (size.value * 0.38f).sp),
        )
    }
}

@Composable
private fun DetailRow(title: String, action: @Composable () -> Unit) {
    Item(size = ItemSize.Sm, role = null) {
        ItemContent {
            ItemTitle {
                BasicText(
                    title,
                    style = Typography.base.copy(color = EsuissTheme.colors.label),
                    maxLines = 1,
                    overflow = TextOverflow.Ellipsis,
                )
            }
        }
        ItemActions { action() }
    }
}

@Composable
private fun DetailProfile(user: DetailUser, role: String, onRole: (String) -> Unit) {
    val colors = EsuissTheme.colors
    ItemGroup(variant = ItemGroupVariant.Inset) {
        listOf(
            "Full name" to user.name,
            "Email" to user.email,
            "Department" to "Product",
            "Joined" to "March 12, 2024",
        ).forEach { (label, value) ->
            DetailRow(label) { BasicText(value, style = Typography.base.copy(color = colors.labelSecondary), maxLines = 1) }
            ItemSeparator()
        }
        DetailRow("Role") {
            Picker(
                value = role,
                onValueChange = onRole,
                modifier = Modifier.semantics { contentDescription = "Role" },
                items = DetailRoles,
                size = SelectSize.Sm,
            )
        }
        ItemSeparator()
        DetailRow("Status") { BasicText(user.status, style = Typography.base.copy(color = colors.labelSecondary)) }
    }
}

@Composable
private fun DetailSessions(
    sessions: List<DetailSession>,
    onSignOut: (DetailSession) -> Unit,
    onSignOutAll: () -> Unit,
) {
    val colors = EsuissTheme.colors
    ItemGroup(variant = ItemGroupVariant.Inset) {
        sessions.forEachIndexed { index, session ->
            key(session.device) {
                if (index > 0) ItemSeparator(Modifier.padding(start = 40.dp))
                Item(size = ItemSize.Sm, role = null) {
                    ItemMedia {
                        Box(
                            Modifier
                                .size(30.dp)
                                .background(colors.gray, RoundedCornerShape(7.dp)),
                            contentAlignment = Alignment.Center,
                        ) {
                            Icon(session.icon, contentDescription = null, size = 16.dp, tint = colors.onMedia)
                        }
                    }
                    ItemContent {
                        BasicText(
                            session.device,
                            style = Typography.base.copy(color = colors.label),
                            maxLines = 1,
                            overflow = TextOverflow.Ellipsis,
                        )
                        BasicText(
                            "${session.place} · ${session.time}",
                            style = Typography.xs.copy(color = colors.labelSecondary),
                            maxLines = 1,
                            overflow = TextOverflow.Ellipsis,
                        )
                    }
                    ItemActions {
                        if (index == 0) {
                            BasicText("This device", style = Typography.sm.copy(color = colors.label))
                        } else {
                            Button(text = "Sign Out", onClick = { onSignOut(session) }, size = ButtonSize.Sm, variant = ButtonVariant.Secondary)
                        }
                    }
                }
            }
        }
    }
    if (sessions.size > 1) {
        Button(
            text = "Sign Out All Other Sessions",
            onClick = onSignOutAll,
            size = ButtonSize.Sm,
            variant = ButtonVariant.Destructive,
        )
    }
}

private val AdminSections = listOf("users" to "Users", "roles" to "Roles", "log" to "Activity", "settings" to "Settings")

@Composable
private fun AdminTabs(home: String, onNavigate: (String) -> Unit, content: @Composable () -> Unit) {
    val colors = EsuissTheme.colors
    var tab by rememberSaveable { mutableStateOf(home) }
    Column(Modifier.fillMaxSize()) {
        Box(
            Modifier
                .weight(1f)
                .fillMaxWidth(),
        ) {
            if (tab == home) {
                content()
            } else {
                BasicText(
                    "This section isn't part of the sample. Choose ${AdminSections.first { it.first == home }.second}.",
                    modifier = Modifier
                        .align(Alignment.Center)
                        .padding(32.dp),
                    style = Typography.base.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                )
            }
        }
        TabBar(
            value = tab,
            onValueChange = {
                onNavigate(it)
                tab = it
            },
        ) {
            TabBarItem("users", "Users", PhosphorIcons.Regular.Users, selectedIcon = PhosphorIcons.Fill.FillUsers)
            TabBarItem("roles", "Roles", PhosphorIcons.Regular.Shield, selectedIcon = PhosphorIcons.Fill.FillShield)
            TabBarItem("log", "Activity", PhosphorIcons.Regular.ChartBar, selectedIcon = PhosphorIcons.Fill.FillChartBar)
            TabBarItem("settings", "Settings", PhosphorIcons.Regular.Gear, selectedIcon = PhosphorIcons.Fill.FillGear)
        }
    }
}
```

A `SplitView` lists users with an `Avatar` and status, and the detail pane shows the selected user's header and a `ToggleGroup` for Profile, Sessions and Security. Profile lists details with a role `Picker`, Sessions lets you sign out one device or all others, and Security has `Switch` rows and a password reset `Button`. The admin `TabBar` switches sections.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add users-detail
```

```bash title="Terminal"
npx @esuiss/uim@latest add users-detail --platform swift
```

```bash title="Terminal"
npx @esuiss/uim@latest add users-detail --platform kotlin
```

The CLI also adds what it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Icon](/docs/components/icon), [Item](/docs/components/item), [Picker](/docs/patterns/picker), [Screen](/docs/components/screen), [Split View](/docs/patterns/split-view), [Switch](/docs/components/switch), [Tab Bar](/docs/components/tab-bar), [Text](/docs/components/text), [Toggle Group](/docs/components/toggle-group).

### Manual

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install phosphor-react-native react-native-reanimated react-native-svg react-native-worklets
```

2. Add the pieces it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Icon](/docs/components/icon), [Item](/docs/components/item), [Picker](/docs/patterns/picker), [Screen](/docs/components/screen), [Split View](/docs/patterns/split-view), [Switch](/docs/components/switch), [Tab Bar](/docs/components/tab-bar), [Text](/docs/components/text), [Toggle Group](/docs/components/toggle-group).

3. Copy the source into `components/blocks/users-detail.tsx`:

```tsx title="uniwind/components/blocks/users-detail.tsx"
import {
  ChartBarIcon,
  DesktopIcon,
  DeviceMobileIcon,
  GearIcon,
  GlobeIcon,
  type Icon as PhosphorIcon,
  ShieldIcon,
  UsersIcon,
} from "phosphor-react-native"
import * as React from "react"
import { useWindowDimensions, View } from "react-native"
import { FadeInDown, ReduceMotion } from "react-native-reanimated"
import { Picker, PickerItem } from "@/components/patterns/picker"
import {
  SplitView,
  SplitViewDetail,
  SplitViewItem,
  SplitViewList,
} from "@/components/patterns/split-view"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import {
  Item,
  ItemActions,
  ItemContent,
  ItemDescription,
  ItemGroup,
  ItemMedia,
  ItemSeparator,
  ItemTitle,
} from "@/components/ui/item"
import { Screen } from "@/components/ui/screen"
import { Switch } from "@/components/ui/switch"
import { TabBar, TabBarItem, TabBarList } from "@/components/ui/tab-bar"
import { Text } from "@/components/ui/text"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

const SECTIONS: { value: string; label: string; icon: PhosphorIcon }[] = [
  { value: "users", label: "Users", icon: UsersIcon },
  { value: "roles", label: "Roles", icon: ShieldIcon },
  { value: "log", label: "Activity", icon: ChartBarIcon },
  { value: "settings", label: "Settings", icon: GearIcon },
]

const ROLES = ["Admin", "Editor", "Support", "Viewer"]

const TABS = ["Profile", "Sessions", "Security"]

type User = {
  name: string
  email: string
  role: string
  status: string
  tint: string
}

const USERS: User[] = [
  {
    name: "Jamie Rivera",
    email: "jamie@company.com",
    role: "Admin",
    status: "Active",
    tint: "bg-indigo dark:bg-indigo",
  },
  {
    name: "Morgan Lee",
    email: "morgan@company.com",
    role: "Editor",
    status: "Active",
    tint: "bg-orange dark:bg-orange",
  },
  {
    name: "Riley Chen",
    email: "riley@company.com",
    role: "Support",
    status: "Active",
    tint: "bg-green dark:bg-green",
  },
  {
    name: "Taylor Kim",
    email: "taylor@company.com",
    role: "Viewer",
    status: "Suspended",
    tint: "bg-cyan dark:bg-cyan",
  },
  {
    name: "Avery Brooks",
    email: "avery@company.com",
    role: "Editor",
    status: "Invited",
    tint: "bg-pink dark:bg-pink",
  },
  {
    name: "Jordan Park",
    email: "jordan@company.com",
    role: "Support",
    status: "Active",
    tint: "bg-mint dark:bg-mint",
  },
]

type Session = {
  device: string
  place: string
  time: string
  icon: PhosphorIcon
}

const INITIAL_SESSIONS: Session[] = [
  {
    device: "Book Pro · Browser",
    place: "San Francisco, US",
    time: "Now",
    icon: DesktopIcon,
  },
  {
    device: "Phone Pro · App",
    place: "San Francisco, US",
    time: "2 hr ago",
    icon: DeviceMobileIcon,
  },
  {
    device: "Desktop · Browser",
    place: "Seattle, US",
    time: "3 days ago",
    icon: GlobeIcon,
  },
]

const SECURITY = [
  { label: "Two-factor authentication", initial: true },
  { label: "Require passkey", initial: false },
  { label: "Sign-in alerts", initial: true },
]

const initials = (name: string) =>
  name
    .split(" ")
    .map((part) => part[0])
    .join("")

function AdminTabBar({
  value,
  onValueChange,
}: {
  value: string
  onValueChange: (value: string) => void
}) {
  return (
    <TabBar value={value} onValueChange={(next) => onValueChange(next)}>
      <TabBarList>
        {SECTIONS.map((section) => (
          <TabBarItem
            key={section.value}
            value={section.value}
            icon={section.icon}
          >
            {section.label}
          </TabBarItem>
        ))}
      </TabBarList>
    </TabBar>
  )
}

function OtherSection({ value, home }: { value: string; home: string }) {
  const label = SECTIONS.find((section) => section.value === value)?.label
  return (
    <View className="flex-1 gap-2 px-4 pt-13">
      <Text role="heading" className="text-3xl font-bold">
        {label}
      </Text>
      <Text className="text-lg text-label-secondary">
        {`This section isn't part of the sample. Choose ${home}.`}
      </Text>
    </View>
  )
}

function UserAvatar({
  user,
  size,
  className,
}: {
  user: User
  size: "sm" | "xl"
  className?: string
}) {
  return (
    <Avatar size={size} className={className}>
      <AvatarFallback className={user.tint}>
        {initials(user.name)}
      </AvatarFallback>
    </Avatar>
  )
}

function SecurityToggle({
  label,
  initial,
  onChange,
}: {
  label: string
  initial: boolean
  onChange: (enabled: boolean) => void
}) {
  const [on, setOn] = React.useState(initial)
  const id = `users-detail-${label.toLowerCase().replaceAll(" ", "-")}`

  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle nativeID={id} className="font-normal">
          {label}
        </ItemTitle>
      </ItemContent>
      <ItemActions>
        <Switch
          checked={on}
          onCheckedChange={(value) => {
            setOn(value)
            onChange(value)
          }}
          accessibilityLabelledBy={id}
        />
      </ItemActions>
    </Item>
  )
}

function ValueRow({ label, value }: { label: string; value: string }) {
  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle className="font-normal">{label}</ItemTitle>
      </ItemContent>
      <ItemActions className="shrink">
        <Text numberOfLines={1}>{value}</Text>
      </ItemActions>
    </Item>
  )
}

function UsersDetail({
  onRoleChange,
  onSignOut,
  onSignOutAll,
  onSecurityChange,
  onSendPasswordReset,
  onNavigate,
}: {
  onRoleChange?: (email: string, role: string) => void
  onSignOut?: (device: string) => void
  onSignOutAll?: () => void
  onSecurityChange?: (email: string, setting: string, enabled: boolean) => void
  onSendPasswordReset?: (email: string) => void
  onNavigate?: (section: string) => void
}) {
  const { width } = useWindowDimensions()
  const wide = width >= 768
  const [section, setSection] = React.useState("users")
  const [selected, setSelected] = React.useState(0)
  const [tab, setTab] = React.useState("Profile")
  const [overrides, setOverrides] = React.useState<Record<number, string>>({})
  const [sessions, setSessions] = React.useState(INITIAL_SESSIONS)
  const user = USERS[selected] ?? USERS[0]
  if (!user) return null
  const role = overrides[selected] ?? user.role

  return (
    <Screen edges={["top", "right", "left"]}>
      {section === "users" ? (
        <SplitView className={wide ? "m-4" : undefined}>
          <SplitViewList
            title="Users"
            className={wide ? "gap-0.5 px-4 pt-5" : "px-4 pb-8"}
          >
            {wide ? (
              <Text
                role="heading"
                className="px-1 pb-2 text-sm font-semibold text-label-secondary"
              >
                Users
              </Text>
            ) : null}
            {USERS.map((item, index) => {
              const active = wide && index === selected
              return (
                <SplitViewItem
                  key={item.email}
                  isActive={index === selected}
                  onPress={() => {
                    setSelected(index)
                    setTab("Profile")
                  }}
                  className={active ? "bg-accent py-1.5" : "py-1.5"}
                >
                  <View className="flex-row items-center gap-2.5">
                    <UserAvatar user={item} size="sm" className="size-7" />
                    <View className="min-w-0 flex-1">
                      <Text
                        numberOfLines={1}
                        className={
                          active ? "text-sm text-on-accent" : "text-sm"
                        }
                      >
                        {item.name}
                      </Text>
                      <Text
                        className={
                          active
                            ? "text-xs text-on-accent"
                            : "text-xs text-label-secondary"
                        }
                      >
                        {overrides[index] ?? item.role}
                      </Text>
                    </View>
                  </View>
                </SplitViewItem>
              )
            })}
          </SplitViewList>
          <SplitViewDetail className={wide ? "p-6" : "px-4 pb-8"}>
            <AnimatedView
              key={selected}
              entering={FadeInDown.duration(800).reduceMotion(
                ReduceMotion.System
              )}
              className="gap-5"
            >
              <View className="flex-row items-center gap-3.5">
                <UserAvatar user={user} size="xl" />
                <View className="min-w-0 flex-1 gap-0.5">
                  <Text role="heading" className="text-2xl font-bold">
                    {user.name}
                  </Text>
                  <Text className="text-sm text-label-secondary">
                    {`${user.email} · ${role}`}
                  </Text>
                </View>
              </View>
              <ToggleGroup
                spacing={0}
                size="sm"
                value={[tab]}
                onValueChange={(value) => {
                  if (value[0]) setTab(value[0])
                }}
                accessibilityLabel="Section"
              >
                {TABS.map((item) => (
                  <ToggleGroupItem key={item} value={item} className="px-4">
                    <Text>{item}</Text>
                  </ToggleGroupItem>
                ))}
              </ToggleGroup>
              <AnimatedView
                key={tab}
                entering={FadeInDown.duration(700).reduceMotion(
                  ReduceMotion.System
                )}
                className="gap-3"
              >
                {tab === "Profile" ? (
                  <ItemGroup variant="inset">
                    {[
                      ["Full name", user.name],
                      ["Email", user.email],
                      ["Department", "Product"],
                      ["Joined", "March 12, 2024"],
                    ].map(([label = "", value = ""]) => (
                      <React.Fragment key={label}>
                        <ValueRow label={label} value={value} />
                        <ItemSeparator />
                      </React.Fragment>
                    ))}
                    <Item size="sm">
                      <ItemContent>
                        <ItemTitle className="font-normal">Role</ItemTitle>
                      </ItemContent>
                      <ItemActions>
                        <Picker
                          size="sm"
                          value={role}
                          onValueChange={(value) => {
                            onRoleChange?.(user.email, value)
                            setOverrides((current) => ({
                              ...current,
                              [selected]: value,
                            }))
                          }}
                          accessibilityLabel="Role"
                          className="bg-transparent px-1"
                        >
                          {ROLES.map((item) => (
                            <PickerItem key={item} value={item}>
                              {item}
                            </PickerItem>
                          ))}
                        </Picker>
                      </ItemActions>
                    </Item>
                    <ItemSeparator />
                    <ValueRow label="Status" value={user.status} />
                  </ItemGroup>
                ) : null}
                {tab === "Sessions" ? (
                  <>
                    <ItemGroup variant="inset">
                      {sessions.map((session, index) => (
                        <React.Fragment key={session.device}>
                          {index > 0 ? (
                            <ItemSeparator className="ms-15" />
                          ) : null}
                          <Item size="sm">
                            <ItemMedia className="size-7.5 rounded-[7px] bg-gray">
                              <Icon
                                as={session.icon}
                                weight="bold"
                                className="size-4 text-on-accent"
                              />
                            </ItemMedia>
                            <ItemContent className="gap-0">
                              <ItemTitle className="font-normal">
                                {session.device}
                              </ItemTitle>
                              <ItemDescription className="text-xs">
                                {`${session.place} · ${session.time}`}
                              </ItemDescription>
                            </ItemContent>
                            <ItemActions>
                              {index === 0 ? (
                                <Text className="text-sm text-label">
                                  This device
                                </Text>
                              ) : (
                                <Button
                                  size="sm"
                                  variant="secondary"
                                  onPress={() => {
                                    onSignOut?.(session.device)
                                    setSessions((current) =>
                                      current.filter(
                                        (item) => item.device !== session.device
                                      )
                                    )
                                  }}
                                >
                                  <Text>Sign Out</Text>
                                </Button>
                              )}
                            </ItemActions>
                          </Item>
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    {sessions.length > 1 ? (
                      <Button
                        size="sm"
                        variant="destructive"
                        className="self-start"
                        onPress={() => {
                          onSignOutAll?.()
                          setSessions((current) => current.slice(0, 1))
                        }}
                      >
                        <Text>Sign Out All Other Sessions</Text>
                      </Button>
                    ) : null}
                  </>
                ) : null}
                {tab === "Security" ? (
                  <>
                    <ItemGroup key={selected} variant="inset">
                      {SECURITY.map((setting, index) => (
                        <React.Fragment key={setting.label}>
                          {index > 0 ? <ItemSeparator /> : null}
                          <SecurityToggle
                            label={setting.label}
                            initial={setting.initial}
                            onChange={(enabled) =>
                              onSecurityChange?.(
                                user.email,
                                setting.label,
                                enabled
                              )
                            }
                          />
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    <Button
                      size="sm"
                      variant="destructive"
                      className="self-start"
                      onPress={() => onSendPasswordReset?.(user.email)}
                    >
                      <Text>Send Password Reset Link</Text>
                    </Button>
                  </>
                ) : null}
              </AnimatedView>
            </AnimatedView>
          </SplitViewDetail>
        </SplitView>
      ) : (
        <OtherSection value={section} home="Users" />
      )}
      <AdminTabBar
        value={section}
        onValueChange={(value) => {
          setSection(value)
          onNavigate?.(value)
        }}
      />
    </Screen>
  )
}

export { UsersDetail }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install phosphor-react-native react-native-reanimated react-native-svg react-native-worklets
```

2. Add the pieces it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Icon](/docs/components/icon), [Item](/docs/components/item), [Picker](/docs/patterns/picker), [Screen](/docs/components/screen), [Split View](/docs/patterns/split-view), [Switch](/docs/components/switch), [Tab Bar](/docs/components/tab-bar), [Text](/docs/components/text), [Toggle Group](/docs/components/toggle-group).

3. Copy the source into `components/blocks/users-detail.tsx`:

```tsx title="nativewind/components/blocks/users-detail.tsx"
import {
  ChartBarIcon,
  DesktopIcon,
  DeviceMobileIcon,
  GearIcon,
  GlobeIcon,
  type Icon as PhosphorIcon,
  ShieldIcon,
  UsersIcon,
} from "phosphor-react-native"
import * as React from "react"
import { useWindowDimensions, View } from "react-native"
import { FadeInDown, ReduceMotion } from "react-native-reanimated"
import { Picker, PickerItem } from "@/components/patterns/picker"
import {
  SplitView,
  SplitViewDetail,
  SplitViewItem,
  SplitViewList,
} from "@/components/patterns/split-view"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import {
  Item,
  ItemActions,
  ItemContent,
  ItemDescription,
  ItemGroup,
  ItemMedia,
  ItemSeparator,
  ItemTitle,
} from "@/components/ui/item"
import { Screen } from "@/components/ui/screen"
import { Switch } from "@/components/ui/switch"
import { TabBar, TabBarItem, TabBarList } from "@/components/ui/tab-bar"
import { Text } from "@/components/ui/text"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

const SECTIONS: { value: string; label: string; icon: PhosphorIcon }[] = [
  { value: "users", label: "Users", icon: UsersIcon },
  { value: "roles", label: "Roles", icon: ShieldIcon },
  { value: "log", label: "Activity", icon: ChartBarIcon },
  { value: "settings", label: "Settings", icon: GearIcon },
]

const ROLES = ["Admin", "Editor", "Support", "Viewer"]

const TABS = ["Profile", "Sessions", "Security"]

type User = {
  name: string
  email: string
  role: string
  status: string
  tint: string
}

const USERS: User[] = [
  {
    name: "Jamie Rivera",
    email: "jamie@company.com",
    role: "Admin",
    status: "Active",
    tint: "bg-indigo dark:bg-indigo",
  },
  {
    name: "Morgan Lee",
    email: "morgan@company.com",
    role: "Editor",
    status: "Active",
    tint: "bg-orange dark:bg-orange",
  },
  {
    name: "Riley Chen",
    email: "riley@company.com",
    role: "Support",
    status: "Active",
    tint: "bg-green dark:bg-green",
  },
  {
    name: "Taylor Kim",
    email: "taylor@company.com",
    role: "Viewer",
    status: "Suspended",
    tint: "bg-cyan dark:bg-cyan",
  },
  {
    name: "Avery Brooks",
    email: "avery@company.com",
    role: "Editor",
    status: "Invited",
    tint: "bg-pink dark:bg-pink",
  },
  {
    name: "Jordan Park",
    email: "jordan@company.com",
    role: "Support",
    status: "Active",
    tint: "bg-mint dark:bg-mint",
  },
]

type Session = {
  device: string
  place: string
  time: string
  icon: PhosphorIcon
}

const INITIAL_SESSIONS: Session[] = [
  {
    device: "Book Pro · Browser",
    place: "San Francisco, US",
    time: "Now",
    icon: DesktopIcon,
  },
  {
    device: "Phone Pro · App",
    place: "San Francisco, US",
    time: "2 hr ago",
    icon: DeviceMobileIcon,
  },
  {
    device: "Desktop · Browser",
    place: "Seattle, US",
    time: "3 days ago",
    icon: GlobeIcon,
  },
]

const SECURITY = [
  { label: "Two-factor authentication", initial: true },
  { label: "Require passkey", initial: false },
  { label: "Sign-in alerts", initial: true },
]

const initials = (name: string) =>
  name
    .split(" ")
    .map((part) => part[0])
    .join("")

function AdminTabBar({
  value,
  onValueChange,
}: {
  value: string
  onValueChange: (value: string) => void
}) {
  return (
    <TabBar value={value} onValueChange={(next) => onValueChange(next)}>
      <TabBarList>
        {SECTIONS.map((section) => (
          <TabBarItem
            key={section.value}
            value={section.value}
            icon={section.icon}
          >
            {section.label}
          </TabBarItem>
        ))}
      </TabBarList>
    </TabBar>
  )
}

function OtherSection({ value, home }: { value: string; home: string }) {
  const label = SECTIONS.find((section) => section.value === value)?.label
  return (
    <View className="flex-1 gap-2 px-4 pt-[3.25rem]">
      <Text role="heading" className="text-3xl font-bold">
        {label}
      </Text>
      <Text className="text-lg text-label-secondary">
        {`This section isn't part of the sample. Choose ${home}.`}
      </Text>
    </View>
  )
}

function UserAvatar({
  user,
  size,
  className,
}: {
  user: User
  size: "sm" | "xl"
  className?: string
}) {
  return (
    <Avatar size={size} className={className}>
      <AvatarFallback className={user.tint}>
        {initials(user.name)}
      </AvatarFallback>
    </Avatar>
  )
}

function SecurityToggle({
  label,
  initial,
  onChange,
}: {
  label: string
  initial: boolean
  onChange: (enabled: boolean) => void
}) {
  const [on, setOn] = React.useState(initial)
  const id = `users-detail-${label.toLowerCase().replaceAll(" ", "-")}`

  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle nativeID={id} className="font-normal">
          {label}
        </ItemTitle>
      </ItemContent>
      <ItemActions>
        <Switch
          checked={on}
          onCheckedChange={(value) => {
            setOn(value)
            onChange(value)
          }}
          accessibilityLabelledBy={id}
        />
      </ItemActions>
    </Item>
  )
}

function ValueRow({ label, value }: { label: string; value: string }) {
  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle className="font-normal">{label}</ItemTitle>
      </ItemContent>
      <ItemActions className="shrink">
        <Text numberOfLines={1}>{value}</Text>
      </ItemActions>
    </Item>
  )
}

function UsersDetail({
  onRoleChange,
  onSignOut,
  onSignOutAll,
  onSecurityChange,
  onSendPasswordReset,
  onNavigate,
}: {
  onRoleChange?: (email: string, role: string) => void
  onSignOut?: (device: string) => void
  onSignOutAll?: () => void
  onSecurityChange?: (email: string, setting: string, enabled: boolean) => void
  onSendPasswordReset?: (email: string) => void
  onNavigate?: (section: string) => void
}) {
  const { width } = useWindowDimensions()
  const wide = width >= 768
  const [section, setSection] = React.useState("users")
  const [selected, setSelected] = React.useState(0)
  const [tab, setTab] = React.useState("Profile")
  const [overrides, setOverrides] = React.useState<Record<number, string>>({})
  const [sessions, setSessions] = React.useState(INITIAL_SESSIONS)
  const user = USERS[selected] ?? USERS[0]
  if (!user) return null
  const role = overrides[selected] ?? user.role

  return (
    <Screen edges={["top", "right", "left"]}>
      {section === "users" ? (
        <SplitView className={wide ? "m-4" : undefined}>
          <SplitViewList
            title="Users"
            className={wide ? "gap-0.5 px-4 pt-5" : "px-4 pb-8"}
          >
            {wide ? (
              <Text
                role="heading"
                className="px-1 pb-2 text-sm font-semibold text-label-secondary"
              >
                Users
              </Text>
            ) : null}
            {USERS.map((item, index) => {
              const active = wide && index === selected
              return (
                <SplitViewItem
                  key={item.email}
                  isActive={index === selected}
                  onPress={() => {
                    setSelected(index)
                    setTab("Profile")
                  }}
                  className={active ? "bg-accent py-1.5" : "py-1.5"}
                >
                  <View className="flex-row items-center gap-2.5">
                    <UserAvatar user={item} size="sm" className="size-7" />
                    <View className="min-w-0 flex-1">
                      <Text
                        numberOfLines={1}
                        className={
                          active ? "text-sm text-on-accent" : "text-sm"
                        }
                      >
                        {item.name}
                      </Text>
                      <Text
                        className={
                          active
                            ? "text-xs text-on-accent"
                            : "text-xs text-label-secondary"
                        }
                      >
                        {overrides[index] ?? item.role}
                      </Text>
                    </View>
                  </View>
                </SplitViewItem>
              )
            })}
          </SplitViewList>
          <SplitViewDetail className={wide ? "p-6" : "px-4 pb-8"}>
            <AnimatedView
              key={selected}
              entering={FadeInDown.duration(800).reduceMotion(
                ReduceMotion.System
              )}
              className="gap-5"
            >
              <View className="flex-row items-center gap-3.5">
                <UserAvatar user={user} size="xl" />
                <View className="min-w-0 flex-1 gap-0.5">
                  <Text role="heading" className="text-2xl font-bold">
                    {user.name}
                  </Text>
                  <Text className="text-sm text-label-secondary">
                    {`${user.email} · ${role}`}
                  </Text>
                </View>
              </View>
              <ToggleGroup
                spacing={0}
                size="sm"
                value={[tab]}
                onValueChange={(value) => {
                  if (value[0]) setTab(value[0])
                }}
                accessibilityLabel="Section"
              >
                {TABS.map((item) => (
                  <ToggleGroupItem key={item} value={item} className="px-4">
                    <Text>{item}</Text>
                  </ToggleGroupItem>
                ))}
              </ToggleGroup>
              <AnimatedView
                key={tab}
                entering={FadeInDown.duration(700).reduceMotion(
                  ReduceMotion.System
                )}
                className="gap-3"
              >
                {tab === "Profile" ? (
                  <ItemGroup variant="inset">
                    {[
                      ["Full name", user.name],
                      ["Email", user.email],
                      ["Department", "Product"],
                      ["Joined", "March 12, 2024"],
                    ].map(([label = "", value = ""]) => (
                      <React.Fragment key={label}>
                        <ValueRow label={label} value={value} />
                        <ItemSeparator />
                      </React.Fragment>
                    ))}
                    <Item size="sm">
                      <ItemContent>
                        <ItemTitle className="font-normal">Role</ItemTitle>
                      </ItemContent>
                      <ItemActions>
                        <Picker
                          size="sm"
                          value={role}
                          onValueChange={(value) => {
                            onRoleChange?.(user.email, value)
                            setOverrides((current) => ({
                              ...current,
                              [selected]: value,
                            }))
                          }}
                          accessibilityLabel="Role"
                          className="bg-transparent px-1"
                        >
                          {ROLES.map((item) => (
                            <PickerItem key={item} value={item}>
                              {item}
                            </PickerItem>
                          ))}
                        </Picker>
                      </ItemActions>
                    </Item>
                    <ItemSeparator />
                    <ValueRow label="Status" value={user.status} />
                  </ItemGroup>
                ) : null}
                {tab === "Sessions" ? (
                  <>
                    <ItemGroup variant="inset">
                      {sessions.map((session, index) => (
                        <React.Fragment key={session.device}>
                          {index > 0 ? (
                            <ItemSeparator className="ms-[3.75rem]" />
                          ) : null}
                          <Item size="sm">
                            <ItemMedia className="size-[1.875rem] rounded-[7px] bg-gray">
                              <Icon
                                as={session.icon}
                                weight="bold"
                                className="size-4 text-on-accent"
                              />
                            </ItemMedia>
                            <ItemContent className="gap-0">
                              <ItemTitle className="font-normal">
                                {session.device}
                              </ItemTitle>
                              <ItemDescription className="text-xs">
                                {`${session.place} · ${session.time}`}
                              </ItemDescription>
                            </ItemContent>
                            <ItemActions>
                              {index === 0 ? (
                                <Text className="text-sm text-label">
                                  This device
                                </Text>
                              ) : (
                                <Button
                                  size="sm"
                                  variant="secondary"
                                  onPress={() => {
                                    onSignOut?.(session.device)
                                    setSessions((current) =>
                                      current.filter(
                                        (item) => item.device !== session.device
                                      )
                                    )
                                  }}
                                >
                                  <Text>Sign Out</Text>
                                </Button>
                              )}
                            </ItemActions>
                          </Item>
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    {sessions.length > 1 ? (
                      <Button
                        size="sm"
                        variant="destructive"
                        className="self-start"
                        onPress={() => {
                          onSignOutAll?.()
                          setSessions((current) => current.slice(0, 1))
                        }}
                      >
                        <Text>Sign Out All Other Sessions</Text>
                      </Button>
                    ) : null}
                  </>
                ) : null}
                {tab === "Security" ? (
                  <>
                    <ItemGroup key={selected} variant="inset">
                      {SECURITY.map((setting, index) => (
                        <React.Fragment key={setting.label}>
                          {index > 0 ? <ItemSeparator /> : null}
                          <SecurityToggle
                            label={setting.label}
                            initial={setting.initial}
                            onChange={(enabled) =>
                              onSecurityChange?.(
                                user.email,
                                setting.label,
                                enabled
                              )
                            }
                          />
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    <Button
                      size="sm"
                      variant="destructive"
                      className="self-start"
                      onPress={() => onSendPasswordReset?.(user.email)}
                    >
                      <Text>Send Password Reset Link</Text>
                    </Button>
                  </>
                ) : null}
              </AnimatedView>
            </AnimatedView>
          </SplitViewDetail>
        </SplitView>
      ) : (
        <OtherSection value={section} home="Users" />
      )}
      <AdminTabBar
        value={section}
        onValueChange={(value) => {
          setSection(value)
          onNavigate?.(value)
        }}
      />
    </Screen>
  )
}

export { UsersDetail }
```

4. Update the import paths to match your project.

**StyleSheet**

1. Install the dependencies:

```bash title="Terminal"
npx expo install phosphor-react-native react-native-reanimated react-native-svg react-native-worklets
```

2. Add the pieces it builds on: [Avatar](/docs/components/avatar), [Button](/docs/components/button), [Icon](/docs/components/icon), [Item](/docs/components/item), [Picker](/docs/patterns/picker), [Screen](/docs/components/screen), [Split View](/docs/patterns/split-view), [Switch](/docs/components/switch), [Tab Bar](/docs/components/tab-bar), [Text](/docs/components/text), [Toggle Group](/docs/components/toggle-group).

3. Copy the source into `components/blocks/users-detail.tsx`:

```tsx title="stylesheet/components/blocks/users-detail.tsx"
import {
  ChartBarIcon,
  DesktopIcon,
  DeviceMobileIcon,
  GearIcon,
  GlobeIcon,
  type Icon as PhosphorIcon,
  ShieldIcon,
  UsersIcon,
} from "phosphor-react-native"
import * as React from "react"
import { StyleSheet, useWindowDimensions, View } from "react-native"
import { FadeInDown, ReduceMotion } from "react-native-reanimated"
import { Picker, PickerItem } from "@/components/patterns/picker"
import {
  SplitView,
  SplitViewDetail,
  SplitViewItem,
  SplitViewList,
} from "@/components/patterns/split-view"
import { AnimatedView } from "@/components/ui/animated-view"
import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Icon } from "@/components/ui/icon"
import {
  Item,
  ItemActions,
  ItemContent,
  ItemDescription,
  ItemGroup,
  ItemMedia,
  ItemSeparator,
  ItemTitle,
} from "@/components/ui/item"
import { Screen } from "@/components/ui/screen"
import { Switch } from "@/components/ui/switch"
import { TabBar, TabBarItem, TabBarList } from "@/components/ui/tab-bar"
import { Text } from "@/components/ui/text"
import { fontSize, type ThemeColors, useTheme } from "@/components/ui/theme"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

const SECTIONS: { value: string; label: string; icon: PhosphorIcon }[] = [
  { value: "users", label: "Users", icon: UsersIcon },
  { value: "roles", label: "Roles", icon: ShieldIcon },
  { value: "log", label: "Activity", icon: ChartBarIcon },
  { value: "settings", label: "Settings", icon: GearIcon },
]

const ROLES = ["Admin", "Editor", "Support", "Viewer"]

const TABS = ["Profile", "Sessions", "Security"]

type Tint = keyof ThemeColors

type User = {
  name: string
  email: string
  role: string
  status: string
  tint: Tint
}

const USERS: User[] = [
  {
    name: "Jamie Rivera",
    email: "jamie@company.com",
    role: "Admin",
    status: "Active",
    tint: "indigo",
  },
  {
    name: "Morgan Lee",
    email: "morgan@company.com",
    role: "Editor",
    status: "Active",
    tint: "orange",
  },
  {
    name: "Riley Chen",
    email: "riley@company.com",
    role: "Support",
    status: "Active",
    tint: "green",
  },
  {
    name: "Taylor Kim",
    email: "taylor@company.com",
    role: "Viewer",
    status: "Suspended",
    tint: "cyan",
  },
  {
    name: "Avery Brooks",
    email: "avery@company.com",
    role: "Editor",
    status: "Invited",
    tint: "pink",
  },
  {
    name: "Jordan Park",
    email: "jordan@company.com",
    role: "Support",
    status: "Active",
    tint: "mint",
  },
]

type Session = {
  device: string
  place: string
  time: string
  icon: PhosphorIcon
}

const INITIAL_SESSIONS: Session[] = [
  {
    device: "Book Pro · Browser",
    place: "San Francisco, US",
    time: "Now",
    icon: DesktopIcon,
  },
  {
    device: "Phone Pro · App",
    place: "San Francisco, US",
    time: "2 hr ago",
    icon: DeviceMobileIcon,
  },
  {
    device: "Desktop · Browser",
    place: "Seattle, US",
    time: "3 days ago",
    icon: GlobeIcon,
  },
]

const SECURITY = [
  { label: "Two-factor authentication", initial: true },
  { label: "Require passkey", initial: false },
  { label: "Sign-in alerts", initial: true },
]

const styles = StyleSheet.create({
  other: { flex: 1, gap: 8, paddingHorizontal: 16, paddingTop: 52 },
  otherTitle: { ...fontSize["3xl"], fontWeight: "700" },
  wideRoot: { margin: 16 },
  listWide: { gap: 2, paddingHorizontal: 16, paddingTop: 20 },
  compact: { paddingHorizontal: 16, paddingBottom: 32 },
  detailWide: { padding: 24 },
  listHeading: {
    ...fontSize.sm,
    paddingHorizontal: 4,
    paddingBottom: 8,
    fontWeight: "600",
  },
  listItem: { paddingVertical: 6 },
  listRow: { flexDirection: "row", alignItems: "center", gap: 10 },
  listText: { minWidth: 0, flex: 1 },
  smallAvatar: { width: 28, height: 28 },
  detail: { gap: 20 },
  profile: { flexDirection: "row", alignItems: "center", gap: 14 },
  profileText: { minWidth: 0, flex: 1, gap: 2 },
  name: { ...fontSize["2xl"], fontWeight: "700" },
  tab: { paddingHorizontal: 16 },
  panel: { gap: 12 },
  regular: { fontWeight: "400" },
  shrink: { flexShrink: 1 },
  picker: { backgroundColor: "transparent", paddingHorizontal: 4 },
  sessionSeparator: { marginStart: 60 },
  sessionMedia: { width: 30, height: 30, borderRadius: 7 },
  tight: { gap: 0 },
  start: { alignSelf: "flex-start" },
})

const initials = (name: string) =>
  name
    .split(" ")
    .map((part) => part[0])
    .join("")

function AdminTabBar({
  value,
  onValueChange,
}: {
  value: string
  onValueChange: (value: string) => void
}) {
  return (
    <TabBar value={value} onValueChange={(next) => onValueChange(next)}>
      <TabBarList>
        {SECTIONS.map((section) => (
          <TabBarItem
            key={section.value}
            value={section.value}
            icon={section.icon}
          >
            {section.label}
          </TabBarItem>
        ))}
      </TabBarList>
    </TabBar>
  )
}

function OtherSection({ value, home }: { value: string; home: string }) {
  const { colors } = useTheme()
  const label = SECTIONS.find((section) => section.value === value)?.label
  return (
    <View style={styles.other}>
      <Text role="heading" style={styles.otherTitle}>
        {label}
      </Text>
      <Text style={[fontSize.lg, { color: colors.labelSecondary }]}>
        {`This section isn't part of the sample. Choose ${home}.`}
      </Text>
    </View>
  )
}

function UserAvatar({
  user,
  size,
  style,
}: {
  user: User
  size: "sm" | "xl"
  style?: React.ComponentProps<typeof Avatar>["style"]
}) {
  const { colors } = useTheme()
  return (
    <Avatar size={size} style={style}>
      <AvatarFallback style={{ backgroundColor: colors[user.tint] }}>
        {initials(user.name)}
      </AvatarFallback>
    </Avatar>
  )
}

function SecurityToggle({
  label,
  initial,
  onChange,
}: {
  label: string
  initial: boolean
  onChange: (enabled: boolean) => void
}) {
  const [on, setOn] = React.useState(initial)
  const id = `users-detail-${label.toLowerCase().replaceAll(" ", "-")}`

  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle nativeID={id} style={styles.regular}>
          {label}
        </ItemTitle>
      </ItemContent>
      <ItemActions>
        <Switch
          checked={on}
          onCheckedChange={(value) => {
            setOn(value)
            onChange(value)
          }}
          accessibilityLabelledBy={id}
        />
      </ItemActions>
    </Item>
  )
}

function ValueRow({ label, value }: { label: string; value: string }) {
  return (
    <Item size="sm">
      <ItemContent>
        <ItemTitle style={styles.regular}>{label}</ItemTitle>
      </ItemContent>
      <ItemActions style={styles.shrink}>
        <Text numberOfLines={1}>{value}</Text>
      </ItemActions>
    </Item>
  )
}

function UsersDetail({
  onRoleChange,
  onSignOut,
  onSignOutAll,
  onSecurityChange,
  onSendPasswordReset,
  onNavigate,
}: {
  onRoleChange?: (email: string, role: string) => void
  onSignOut?: (device: string) => void
  onSignOutAll?: () => void
  onSecurityChange?: (email: string, setting: string, enabled: boolean) => void
  onSendPasswordReset?: (email: string) => void
  onNavigate?: (section: string) => void
}) {
  const { colors } = useTheme()
  const { width } = useWindowDimensions()
  const wide = width >= 768
  const [section, setSection] = React.useState("users")
  const [selected, setSelected] = React.useState(0)
  const [tab, setTab] = React.useState("Profile")
  const [overrides, setOverrides] = React.useState<Record<number, string>>({})
  const [sessions, setSessions] = React.useState(INITIAL_SESSIONS)
  const user = USERS[selected] ?? USERS[0]
  if (!user) return null
  const role = overrides[selected] ?? user.role

  return (
    <Screen edges={["top", "right", "left"]}>
      {section === "users" ? (
        <SplitView style={wide ? styles.wideRoot : undefined}>
          <SplitViewList
            title="Users"
            style={wide ? styles.listWide : styles.compact}
          >
            {wide ? (
              <Text
                role="heading"
                style={[styles.listHeading, { color: colors.labelSecondary }]}
              >
                Users
              </Text>
            ) : null}
            {USERS.map((item, index) => {
              const active = wide && index === selected
              return (
                <SplitViewItem
                  key={item.email}
                  isActive={index === selected}
                  onPress={() => {
                    setSelected(index)
                    setTab("Profile")
                  }}
                  style={
                    active
                      ? { paddingVertical: 6, backgroundColor: colors.accent }
                      : styles.listItem
                  }
                >
                  <View style={styles.listRow}>
                    <UserAvatar
                      user={item}
                      size="sm"
                      style={styles.smallAvatar}
                    />
                    <View style={styles.listText}>
                      <Text
                        numberOfLines={1}
                        style={[
                          fontSize.sm,
                          active && { color: colors.onAccent },
                        ]}
                      >
                        {item.name}
                      </Text>
                      <Text
                        style={[
                          fontSize.xs,
                          {
                            color: active
                              ? colors.onAccent
                              : colors.labelSecondary,
                          },
                        ]}
                      >
                        {overrides[index] ?? item.role}
                      </Text>
                    </View>
                  </View>
                </SplitViewItem>
              )
            })}
          </SplitViewList>
          <SplitViewDetail style={wide ? styles.detailWide : styles.compact}>
            <AnimatedView
              key={selected}
              entering={FadeInDown.duration(800).reduceMotion(
                ReduceMotion.System
              )}
              style={styles.detail}
            >
              <View style={styles.profile}>
                <UserAvatar user={user} size="xl" />
                <View style={styles.profileText}>
                  <Text role="heading" style={styles.name}>
                    {user.name}
                  </Text>
                  <Text style={[fontSize.sm, { color: colors.labelSecondary }]}>
                    {`${user.email} · ${role}`}
                  </Text>
                </View>
              </View>
              <ToggleGroup
                spacing={0}
                size="sm"
                value={[tab]}
                onValueChange={(value) => {
                  if (value[0]) setTab(value[0])
                }}
                accessibilityLabel="Section"
              >
                {TABS.map((item) => (
                  <ToggleGroupItem key={item} value={item} style={styles.tab}>
                    <Text>{item}</Text>
                  </ToggleGroupItem>
                ))}
              </ToggleGroup>
              <AnimatedView
                key={tab}
                entering={FadeInDown.duration(700).reduceMotion(
                  ReduceMotion.System
                )}
                style={styles.panel}
              >
                {tab === "Profile" ? (
                  <ItemGroup variant="inset">
                    {[
                      ["Full name", user.name],
                      ["Email", user.email],
                      ["Department", "Product"],
                      ["Joined", "March 12, 2024"],
                    ].map(([label = "", value = ""]) => (
                      <React.Fragment key={label}>
                        <ValueRow label={label} value={value} />
                        <ItemSeparator />
                      </React.Fragment>
                    ))}
                    <Item size="sm">
                      <ItemContent>
                        <ItemTitle style={styles.regular}>Role</ItemTitle>
                      </ItemContent>
                      <ItemActions>
                        <Picker
                          size="sm"
                          value={role}
                          onValueChange={(value) => {
                            onRoleChange?.(user.email, value)
                            setOverrides((current) => ({
                              ...current,
                              [selected]: value,
                            }))
                          }}
                          accessibilityLabel="Role"
                          style={styles.picker}
                        >
                          {ROLES.map((item) => (
                            <PickerItem key={item} value={item}>
                              {item}
                            </PickerItem>
                          ))}
                        </Picker>
                      </ItemActions>
                    </Item>
                    <ItemSeparator />
                    <ValueRow label="Status" value={user.status} />
                  </ItemGroup>
                ) : null}
                {tab === "Sessions" ? (
                  <>
                    <ItemGroup variant="inset">
                      {sessions.map((session, index) => (
                        <React.Fragment key={session.device}>
                          {index > 0 ? (
                            <ItemSeparator style={styles.sessionSeparator} />
                          ) : null}
                          <Item size="sm">
                            <ItemMedia
                              style={[
                                styles.sessionMedia,
                                { backgroundColor: colors.gray },
                              ]}
                            >
                              <Icon
                                as={session.icon}
                                weight="bold"
                                size={16}
                                color={colors.onAccent}
                              />
                            </ItemMedia>
                            <ItemContent style={styles.tight}>
                              <ItemTitle style={styles.regular}>
                                {session.device}
                              </ItemTitle>
                              <ItemDescription style={fontSize.xs}>
                                {`${session.place} · ${session.time}`}
                              </ItemDescription>
                            </ItemContent>
                            <ItemActions>
                              {index === 0 ? (
                                <Text
                                  style={[fontSize.sm, { color: colors.label }]}
                                >
                                  This device
                                </Text>
                              ) : (
                                <Button
                                  size="sm"
                                  variant="secondary"
                                  onPress={() => {
                                    onSignOut?.(session.device)
                                    setSessions((current) =>
                                      current.filter(
                                        (item) => item.device !== session.device
                                      )
                                    )
                                  }}
                                >
                                  <Text>Sign Out</Text>
                                </Button>
                              )}
                            </ItemActions>
                          </Item>
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    {sessions.length > 1 ? (
                      <Button
                        size="sm"
                        variant="destructive"
                        style={styles.start}
                        onPress={() => {
                          onSignOutAll?.()
                          setSessions((current) => current.slice(0, 1))
                        }}
                      >
                        <Text>Sign Out All Other Sessions</Text>
                      </Button>
                    ) : null}
                  </>
                ) : null}
                {tab === "Security" ? (
                  <>
                    <ItemGroup key={selected} variant="inset">
                      {SECURITY.map((setting, index) => (
                        <React.Fragment key={setting.label}>
                          {index > 0 ? <ItemSeparator /> : null}
                          <SecurityToggle
                            label={setting.label}
                            initial={setting.initial}
                            onChange={(enabled) =>
                              onSecurityChange?.(
                                user.email,
                                setting.label,
                                enabled
                              )
                            }
                          />
                        </React.Fragment>
                      ))}
                    </ItemGroup>
                    <Button
                      size="sm"
                      variant="destructive"
                      style={styles.start}
                      onPress={() => onSendPasswordReset?.(user.email)}
                    >
                      <Text>Send Password Reset Link</Text>
                    </Button>
                  </>
                ) : null}
              </AnimatedView>
            </AnimatedView>
          </SplitViewDetail>
        </SplitView>
      ) : (
        <OtherSection value={section} home="Users" />
      )}
      <AdminTabBar
        value={section}
        onValueChange={(value) => {
          setSection(value)
          onNavigate?.(value)
        }}
      />
    </Screen>
  )
}

export { UsersDetail }
```

4. Update the import paths to match your project.

**SwiftUI**

1. Target iOS 17 or later.

2. Add the Swift package to your app:

```swift title="Package.swift"
.package(url: "https://github.com/phosphor-icons/swift", from: "2.1.0")
```

3. Copy the theme files every view uses:

```swift title="swift/Theme/Theme.swift"
import SwiftUI
import UIKit

struct RGBA: Sendable {
  let red: CGFloat
  let green: CGFloat
  let blue: CGFloat
  let alpha: CGFloat

  init(_ hex: UInt32, _ alpha: CGFloat = 1) {
    red = CGFloat((hex >> 16) & 0xFF) / 255
    green = CGFloat((hex >> 8) & 0xFF) / 255
    blue = CGFloat(hex & 0xFF) / 255
    self.alpha = alpha
  }

  var uiColor: UIColor {
    UIColor(red: red, green: green, blue: blue, alpha: alpha)
  }
}

extension Color {
  static func adaptive(light: RGBA, dark: RGBA) -> Color {
    let lightColor = light.uiColor
    let darkColor = dark.uiColor
    return Color(uiColor: UIColor { traits in
      traits.userInterfaceStyle == .dark ? darkColor : lightColor
    })
  }
}

public struct TextStyle: Sendable, Hashable {
  public let size: CGFloat
  public let lineHeight: CGFloat
  public let letterSpacing: CGFloat

  public init(size: CGFloat, lineHeight: CGFloat, letterSpacing: CGFloat) {
    self.size = size
    self.lineHeight = lineHeight
    self.letterSpacing = letterSpacing
  }

  public func font(weight: Font.Weight = .regular) -> Font {
    .system(size: size, weight: weight)
  }

  public var lineSpacing: CGFloat {
    max(0, lineHeight - UIFont.systemFont(ofSize: size).lineHeight)
  }
}

extension Hashable where Self == Font {
  public static func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> Font {
    style.font(weight: weight)
  }
}

private struct TextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  func body(content: Content) -> some View {
    content
      .font(style.font(weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(style.lineSpacing)
      .padding(.vertical, style.lineSpacing / 2)
  }
}

extension View {
  public func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(TextStyleModifier(style: style, weight: weight))
  }
}

public struct Shadow: Sendable, Hashable {
  public let color: Color
  public let radius: CGFloat
  public let x: CGFloat
  public let y: CGFloat

  public init(color: Color, radius: CGFloat, x: CGFloat = 0, y: CGFloat = 0) {
    self.color = color
    self.radius = radius
    self.x = x
    self.y = y
  }
}

extension View {
  public func shadow(_ shadow: Shadow) -> some View {
    self.shadow(color: shadow.color, radius: shadow.radius, x: shadow.x, y: shadow.y)
  }
}
```

```swift title="swift/Theme/Tokens.swift"
import SwiftUI

extension Color {
  public static let surface = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let surfaceSecondary = Color.adaptive(light: .init(0xF5F5F7), dark: .init(0x161617))
  public static let surfaceTertiary = Color.adaptive(light: .init(0xE8E8ED), dark: .init(0x2C2C2E))
  public static let surfaceRaised = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let label = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let labelSecondary = Color.adaptive(light: .init(0x6E6E73), dark: .init(0xA1A1A6))
  public static let labelTertiary = Color.adaptive(light: .init(0x86868B), dark: .init(0x86868B))
  public static let labelQuaternary = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let control = Color.adaptive(light: .init(0x000000, 0.04), dark: .init(0xFFFFFF, 0.1))
  public static let controlPressed = Color.adaptive(light: .init(0x000000, 0.12), dark: .init(0xFFFFFF, 0.22))
  public static let controlSelected = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let controlDisabled = Color.adaptive(light: .init(0x000000, 0.03), dark: .init(0xFFFFFF, 0.05))
  public static let onControlSelected = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let itemPressed = Color.adaptive(light: .init(0x000000, 0.08), dark: .init(0xFFFFFF, 0.12))
  public static let itemSelected = Color.adaptive(light: .init(0x000000, 0.06), dark: .init(0xFFFFFF, 0.1))
  public static let separator = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let separatorStrong = Color.adaptive(light: .init(0x86868B), dark: .init(0x6E6E73))
  public static let accent = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentPressed = Color.adaptive(light: .init(0x005BB8), dark: .init(0x004D9E))
  public static let accentSelected = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentDisabled = Color.adaptive(light: .init(0x0071E3, 0.4), dark: .init(0x0071E3, 0.4))
  public static let onAccent = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let accentSurface = Color.adaptive(light: .init(0x0071E3, 0.09), dark: .init(0x0071E3, 0.18))
  public static let accentSurfacePressed = Color.adaptive(light: .init(0x0071E3, 0.18), dark: .init(0x0071E3, 0.3))
  public static let link = Color.adaptive(light: .init(0x0066CC), dark: .init(0x2997FF))
  public static let focus = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let scrim = Color.adaptive(light: .init(0x000000, 0.48), dark: .init(0x000000, 0.48))
  public static let media = Color.adaptive(light: .init(0x000000), dark: .init(0x000000))
  public static let onMedia = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let danger = Color.adaptive(light: .init(0xD0000A), dark: .init(0xFF5447))
  public static let dangerSurface = Color.adaptive(light: .init(0xD70015, 0.08), dark: .init(0xFF453A, 0.2))
  public static let dangerSurfacePressed = Color.adaptive(light: .init(0xD70015, 0.16), dark: .init(0xFF453A, 0.36))
  public static let success = Color.adaptive(light: .init(0x008009), dark: .init(0x30D158))
  public static let successSurface = Color.adaptive(light: .init(0xEFFAF1), dark: .init(0x30D158, 0.16))
  public static let warning = Color.adaptive(light: .init(0xB64400), dark: .init(0xFF9F0A))
  public static let warningSurface = Color.adaptive(light: .init(0xFFF5EA), dark: .init(0xFF9F0A, 0.16))
}

public enum Radius {
  public static let xs: CGFloat = 3
  public static let sm: CGFloat = 5
  public static let md: CGFloat = 8
  public static let lg: CGFloat = 10
  public static let xl: CGFloat = 12
  public static let xl2: CGFloat = 18
  public static let xl3: CGFloat = 28
  public static let full: CGFloat = 9999
}

extension TextStyle {
  public static let xs3 = TextStyle(size: 11, lineHeight: 13, letterSpacing: 0.066)
  public static let xs2 = TextStyle(size: 12, lineHeight: 16, letterSpacing: 0)
  public static let xs = TextStyle(size: 13, lineHeight: 18, letterSpacing: -0.078)
  public static let sm = TextStyle(size: 15, lineHeight: 20, letterSpacing: -0.24)
  public static let md = TextStyle(size: 16, lineHeight: 21, letterSpacing: -0.32)
  public static let base = TextStyle(size: 17, lineHeight: 22, letterSpacing: -0.442)
  public static let lg = TextStyle(size: 20, lineHeight: 25, letterSpacing: -0.46)
  public static let xl = TextStyle(size: 22, lineHeight: 28, letterSpacing: -0.264)
  public static let xl2 = TextStyle(size: 28, lineHeight: 34, letterSpacing: 0.392)
  public static let xl3 = TextStyle(size: 34, lineHeight: 41, letterSpacing: 0.408)

  public static let allCases: [TextStyle] = [.xs3, .xs2, .xs, .sm, .md, .base, .lg, .xl, .xl2, .xl3]
}

extension Shadow {
  public static let md = Shadow(color: .black.opacity(0.08), radius: 6, x: 2, y: 4)
  public static let lg = Shadow(color: .black.opacity(0.12), radius: 12, y: 4)
}
```

4. Copy the source and every file it uses:

```swift title="swift/Blocks/UsersDetail.swift"
import PhosphorSwift
import SwiftUI

public struct UsersDetail: View {
  struct User: Identifiable {
    let name: String
    let email: String
    let role: String
    let status: String
    let tint: Color

    var id: String { email }
  }

  struct Session: Identifiable, Equatable {
    let device: String
    let place: String
    let time: String
    let icon: Image

    var id: String { device }
  }

  static let roles = ["Admin", "Editor", "Support", "Viewer"]
  static let tabs = ["Profile", "Sessions", "Security"]

  static var users: [User] {
    [
      User(name: "Jamie Rivera", email: "jamie@company.com", role: "Admin", status: "Active", tint: .indigo),
      User(name: "Morgan Lee", email: "morgan@company.com", role: "Editor", status: "Active", tint: .orange),
      User(name: "Riley Chen", email: "riley@company.com", role: "Support", status: "Active", tint: .green),
      User(name: "Taylor Kim", email: "taylor@company.com", role: "Viewer", status: "Suspended", tint: .blue),
      User(name: "Avery Brooks", email: "avery@company.com", role: "Editor", status: "Invited", tint: .pink),
      User(name: "Jordan Park", email: "jordan@company.com", role: "Support", status: "Active", tint: .mint),
    ]
  }

  static var initialSessions: [Session] {
    [
      Session(device: "Book Pro · Browser", place: "San Francisco, US", time: "Now", icon: Ph.desktop.bold),
      Session(device: "Phone Pro · App", place: "San Francisco, US", time: "2 hr ago", icon: Ph.deviceMobile.bold),
      Session(device: "Desktop · Browser", place: "Seattle, US", time: "3 days ago", icon: Ph.globe.bold),
    ]
  }

  static let security: [(label: LocalizedStringKey, key: String, initial: Bool)] = [
    ("Two-factor authentication", "twoFactor", true),
    ("Require passkey", "passkey", false),
    ("Sign-in alerts", "alerts", true),
  ]

  private var onNavigate: ((String) -> Void)?
  private var onRoleChange: ((String, String) -> Void)?
  private var onSignOut: ((String) -> Void)?
  private var onSignOutAll: (() -> Void)?
  private var onSecurityChange: ((String, String, Bool) -> Void)?
  private var onSendPasswordReset: ((String) -> Void)?
  @State private var selected: Int
  @State private var tab: String?
  @State private var overrides: [Int: String] = [:]
  @State private var sessions: [Session]
  @State private var settings: [Int: [String: Bool]] = [:]
  @State private var column: SplitViewColumn
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    onRoleChange: ((_ user: String, _ role: String) -> Void)? = nil,
    onSignOut: ((_ device: String) -> Void)? = nil,
    onSignOutAll: (() -> Void)? = nil,
    onSecurityChange: ((_ user: String, _ setting: String, _ enabled: Bool) -> Void)? = nil,
    onSendPasswordReset: ((_ user: String) -> Void)? = nil,
    onNavigate: ((_ section: String) -> Void)? = nil
  ) {
    self.init(selected: 0)
    self.onRoleChange = onRoleChange
    self.onSignOut = onSignOut
    self.onSignOutAll = onSignOutAll
    self.onNavigate = onNavigate
    self.onSecurityChange = onSecurityChange
    self.onSendPasswordReset = onSendPasswordReset
  }

  init(selected: Int, tab: String = "Profile", column: SplitViewColumn = .list) {
    _selected = State(initialValue: selected)
    _tab = State(initialValue: tab)
    _column = State(initialValue: column)
    _sessions = State(initialValue: Self.initialSessions)
  }

  private var animation: Animation? {
    reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.45)
  }

  private func role(_ index: Int) -> String {
    overrides[index] ?? Self.users[index].role
  }

  public var body: some View {
    UsersDetailShell(home: "users", onNavigate: onNavigate) {
      page
    }
  }

  @ViewBuilder private var page: some View {
    let user = Self.users[selected]
    Screen {
      SplitView(column: $column) {
        SplitViewList("Users") {
          VStack(alignment: .leading, spacing: 0) {
            UsersDetailHeading()
            ForEach(Array(Self.users.enumerated()), id: \.element.id) { index, item in
              SplitViewItem(isActive: index == selected, action: {
                selected = index
                tab = "Profile"
              }) {
                HStack(spacing: 10) {
                  UsersDetailAvatar(user: item, size: 32)
                  VStack(alignment: .leading, spacing: 0) {
                    Text(verbatim: item.name)
                      .scaledFont(.sm)
                    Text(LocalizedStringKey(role(index)))
                      .scaledFont(.xs)
                      .foregroundStyle(Color.labelSecondary)
                  }
                }
                .accessibilityElement(children: .combine)
              }
            }
          }
        }
        SplitViewDetail {
          detail(user)
            .id(selected)
            .transition(.opacity.combined(with: .offset(y: 8)))
        }
      }
    }
  }

  private func detail(_ user: User) -> some View {
    let current = tab ?? "Profile"
    return VStack(alignment: .leading, spacing: 20) {
      HStack(spacing: 14) {
        UsersDetailAvatar(user: user, size: 64)
        VStack(alignment: .leading, spacing: 2) {
          Text(verbatim: user.name)
            .scaledTextStyle(.xl2, weight: .bold)
            .accessibilityAddTraits(.isHeader)
          Text(verbatim: "\(user.email) · \(role(selected))")
            .scaledFont(.sm)
            .foregroundStyle(Color.labelSecondary)
        }
      }
      .padding(.top, 8)
      ToggleGroup(
        selection: Binding<String?>(
          get: { tab },
          set: { value in
            guard let value else { return }
            withAnimation(animation) { tab = value }
          }
        ),
        size: .sm,
        spacing: 0
      ) {
        ForEach(Self.tabs, id: \.self) { item in
          ToggleGroupItem(LocalizedStringKey(item), value: item)
            .frame(maxWidth: .infinity)
        }
      }
      .accessibilityLabel(Text("Section"))
      Group {
        switch current {
        case "Sessions": sessionsTab(user)
        case "Security": securityTab(user)
        default: profileTab(user)
        }
      }
      .id(current)
      .transition(.opacity.combined(with: .offset(y: 6)))
    }
    .foregroundStyle(Color.label)
  }

  private func profileTab(_ user: User) -> some View {
    let rows: [(LocalizedStringKey, String)] = [
      ("Full name", user.name),
      ("Email", user.email),
      ("Department", "Product"),
      ("Joined", "March 12, 2024"),
    ]
    let index = selected
    let binding = Binding<String?>(
      get: { role(index) },
      set: { value in
        guard let value, value != role(index) else { return }
        onRoleChange?(user.email, value)
        overrides[index] = value
      }
    )
    return ItemGroup(.inset) {
      ForEach(Array(rows.enumerated()), id: \.offset) { _, row in
        Item(size: .sm) {
          ItemContent {
            ItemTitle { Text(row.0).fontWeight(.regular) }
          }
          ItemActions {
            Text(verbatim: row.1)
              .foregroundStyle(Color.labelSecondary)
              .lineLimit(1)
          }
        }
        .accessibilityElement(children: .combine)
        ItemSeparator()
      }
      Item(size: .sm) {
        ItemContent {
          ItemTitle { Text("Role").fontWeight(.regular) }
        }
        ItemActions {
          OptionPicker(selection: binding, size: .sm) {
            ForEach(Self.roles, id: \.self) { item in
              OptionPickerItem(LocalizedStringKey(item), value: item)
            }
          }
          .fixedSize()
          .accessibilityLabel(Text("Role"))
        }
      }
      ItemSeparator()
      Item(size: .sm) {
        ItemContent {
          ItemTitle { Text("Status").fontWeight(.regular) }
        }
        ItemActions {
          Text(LocalizedStringKey(user.status))
            .foregroundStyle(Color.labelSecondary)
        }
      }
      .accessibilityElement(children: .combine)
    }
  }

  private func sessionsTab(_ user: User) -> some View {
    VStack(alignment: .leading, spacing: 12) {
      ItemGroup(.inset) {
        ForEach(Array(sessions.enumerated()), id: \.element.id) { index, session in
          if index > 0 {
            ItemSeparator().padding(.leading, 44)
          }
          Item(size: .sm) {
            ItemMedia {
              session.icon
                .frame(width: 16, height: 16)
                .foregroundStyle(Color.onAccent)
                .frame(width: 30, height: 30)
                .background(Color.gray, in: RoundedRectangle(cornerRadius: 7, style: .continuous))
            }
            ItemContent {
              ItemTitle { Text(verbatim: session.device).fontWeight(.regular) }
              ItemDescription(verbatim: "\(session.place) · \(session.time)")
            }
            ItemActions {
              if index == 0 {
                Text("This device")
                  .scaledFont(.sm)
              } else {
                Button("Sign Out") {
                  onSignOut?(session.device)
                  withAnimation(animation) { sessions.removeAll { $0.device == session.device } }
                }
                .buttonStyle(.variant(.secondary, size: .sm))
              }
            }
          }
          .transition(.opacity)
        }
      }
      if sessions.count > 1 {
        Button("Sign Out All Other Sessions") {
          onSignOutAll?()
          withAnimation(animation) { sessions = Array(sessions.prefix(1)) }
        }
        .buttonStyle(.variant(.destructive, size: .sm))
      }
    }
  }

  private func securityTab(_ user: User) -> some View {
    let index = selected
    return VStack(alignment: .leading, spacing: 12) {
      ItemGroup(.inset) {
        ForEach(Array(Self.security.enumerated()), id: \.offset) { position, item in
          if position > 0 {
            ItemSeparator()
          }
          Item(size: .sm) {
            ItemContent {
              ItemTitle { Text(item.label).fontWeight(.regular) }
            }
            ItemActions {
              Toggle(isOn: Binding(
                get: { settings[index]?[item.key] ?? item.initial },
                set: { value in
                  onSecurityChange?(user.email, item.key, value)
                  settings[index, default: [:]][item.key] = value
                }
              )) {
                Text(item.label)
              }
              .labelsHidden()
              .toggleStyle(SwitchStyle())
              .accessibilityLabel(Text(item.label))
            }
          }
        }
      }
      Button("Send Password Reset Link") {
        onSendPasswordReset?(user.email)
      }
      .buttonStyle(.variant(.destructive, size: .sm))
    }
  }
}

private struct UsersDetailAvatar: View {
  let user: UsersDetail.User
  let size: CGFloat

  var body: some View {
    Text(verbatim: user.name.split(separator: " ").compactMap(\.first).map(String.init).joined())
      .font(.system(size: size * 0.38, weight: .semibold))
      .foregroundStyle(Color.onAccent)
      .frame(width: size, height: size)
      .background(user.tint, in: Circle())
      .accessibilityHidden(true)
  }
}

private struct UsersDetailHeading: View {
  @Environment(\.splitView) private var splitView

  var body: some View {
    if splitView?.wide ?? false {
      Text("Users")
        .scaledFont(.sm, weight: .semibold)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 4)
        .padding(.vertical, 8)
        .accessibilityAddTraits(.isHeader)
    }
  }
}

private struct UsersDetailShell<Content: View>: View {
  let home: String
  let onNavigate: ((String) -> Void)?
  let content: Content

  @State private var tab: String

  init(home: String, onNavigate: ((String) -> Void)?, @ViewBuilder content: () -> Content) {
    self.home = home
    self.onNavigate = onNavigate
    self.content = content()
    _tab = State(initialValue: home)
  }

  private static var sections: [(value: String, label: LocalizedStringKey, icon: Image, active: Image)] {
    [
      ("users", "Users", Ph.users.regular, Ph.users.fill),
      ("roles", "Roles", Ph.shield.regular, Ph.shield.fill),
      ("log", "Activity", Ph.chartBar.regular, Ph.chartBar.fill),
      ("settings", "Settings", Ph.gear.regular, Ph.gear.fill),
    ]
  }

  var body: some View {
    let selection = Binding<String>(
      get: { tab },
      set: { value in
        guard value != tab else { return }
        onNavigate?(value)
        tab = value
      }
    )
    Screen {
      ZStack {
        content
          .opacity(tab == home ? 1 : 0)
          .allowsHitTesting(tab == home)
          .accessibilityHidden(tab != home)
        if tab != home {
          Empty {
            EmptyHeader {
              EmptyDescription("This section isn't part of the sample. Choose \(Text(Self.sections.first { $0.value == home }?.label ?? "")).")
            }
          }
          .background(Color.surface)
        }
      }
      .frame(maxHeight: .infinity)
      TabBar(selection: selection) {
        ForEach(Self.sections, id: \.value) { section in
          TabBarItem(section.label, value: section.value, icon: section.icon, activeIcon: section.active)
        }
      }
    }
  }
}
```

```swift title="swift/Components/Button.swift"
import SwiftUI

public struct VariantButtonStyle: ButtonStyle {
  public enum Variant: CaseIterable, Sendable {
    case `default`, outline, secondary, tinted, ghost, plain, destructive, link
  }

  public enum Size: CaseIterable, Sendable {
    case `default`, xs, sm, lg, xl, icon, iconXs, iconSm, iconLg, iconXl

    var height: CGFloat {
      switch self {
      case .xs, .iconXs: 24
      case .sm, .iconSm: 32
      case .default, .icon: 36
      case .lg, .iconLg: 44
      case .xl, .iconXl: 56
      }
    }

    var horizontalPadding: CGFloat {
      switch self {
      case .xs: 11
      case .sm: 12
      case .default: 16
      case .lg: 22
      case .xl: 31
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: 0
      }
    }

    var spacing: CGFloat {
      switch self {
      case .xs, .sm, .iconXs, .iconSm: 4
      case .xl, .iconXl: 8
      default: 6
      }
    }

    var textStyle: TextStyle {
      switch self {
      case .xs, .iconXs: .xs2
      case .lg, .xl: .base
      default: .sm
      }
    }

    public var iconSize: CGFloat {
      switch self {
      case .xs, .iconXs: 12
      default: 16
      }
    }

    var blockRadius: CGFloat {
      switch self {
      case .xs, .iconXs: Radius.sm
      case .lg, .iconLg: Radius.lg
      case .xl, .iconXl: Radius.xl
      default: Radius.md
      }
    }

    var isIcon: Bool {
      switch self {
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: true
      default: false
      }
    }
  }

  let variant: Variant
  let size: Size
  let block: Bool
  var metrics: ButtonMetrics?

  public init(_ variant: Variant = .default, size: Size = .default, block: Bool = false) {
    self.variant = variant
    self.size = size
    self.block = block
  }

  init(_ variant: Variant, size: Size, metrics: ButtonMetrics) {
    self.variant = variant
    self.size = size
    self.block = false
    self.metrics = metrics
  }

  public func makeBody(configuration: Configuration) -> some View {
    StyledButton(configuration: configuration, variant: variant, size: size, block: block, metrics: metrics)
  }
}

struct ButtonMetrics: Sendable {
  var horizontalPadding: CGFloat
  var spacing: CGFloat
  var iconSize: CGFloat
  var textStyle: TextStyle
}

private struct StyledButton: View {
  let configuration: ButtonStyleConfiguration
  let variant: VariantButtonStyle.Variant
  let size: VariantButtonStyle.Size
  let block: Bool
  let metrics: ButtonMetrics?

  @Environment(\.colorScheme) private var colorScheme
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.buttonGroup) private var group

  var body: some View {
    let joined = group != nil && variant != .ghost && variant != .plain
    let rounded = RoundedRectangle(
      cornerRadius: block ? size.blockRadius : Radius.full,
      style: .continuous
    )
    let shape = joined ? AnyShape(Rectangle()) : AnyShape(rounded)
    configuration.label
      .labelStyle(ButtonLabelStyle(spacing: metrics?.spacing ?? size.spacing, iconSize: metrics?.iconSize ?? size.iconSize))
    .font((metrics?.textStyle ?? size.textStyle).font())
    .tracking((metrics?.textStyle ?? size.textStyle).letterSpacing)
    .underline(variant == .link && pressed && isEnabled)
    .lineLimit(1)
    .foregroundStyle(foreground)
    .padding(.horizontal, metrics?.horizontalPadding ?? size.horizontalPadding)
    .frame(width: size.isIcon && !block ? size.height : nil, height: size.height)
    .frame(maxWidth: block || group == .vertical ? .infinity : nil)
    .background(background, in: shape)
    .overlay {
      if variant == .outline && !joined {
        rounded.strokeBorder(Color.separator)
      }
    }
    .contentShape(shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      joined ? [ButtonGroupFrame(bounds: anchor, outlined: variant == .outline)] : []
    }
  }

  private var isDark: Bool { colorScheme == .dark }
  private var pressed: Bool { configuration.isPressed }

  private var foreground: Color {
    switch variant {
    case .default:
      .onAccent
    case .outline, .secondary, .ghost:
      isEnabled ? .label : .labelQuaternary
    case .tinted, .plain:
      isEnabled ? .link : .link.opacity(0.4)
    case .destructive:
      isEnabled ? .danger : .danger.opacity(0.4)
    case .link:
      isEnabled ? .link : .labelQuaternary
    }
  }

  private var background: Color {
    switch variant {
    case .default:
      !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    case .outline:
      isEnabled && pressed ? .itemPressed : isDark ? .clear : .surface
    case .secondary:
      !isEnabled ? .controlDisabled : pressed ? .controlPressed : .control
    case .tinted:
      isEnabled && pressed ? .accentSurfacePressed : .accentSurface
    case .ghost:
      isEnabled && pressed ? .itemPressed : .clear
    case .plain:
      isEnabled && pressed ? .itemPressed : .clear
    case .destructive:
      isEnabled && pressed ? .dangerSurfacePressed : .dangerSurface
    case .link:
      .clear
    }
  }
}

struct ButtonLabelStyle: LabelStyle {
  let spacing: CGFloat
  let iconSize: CGFloat

  func makeBody(configuration: Configuration) -> some View {
    HStack(spacing: spacing) {
      configuration.icon
        .frame(width: iconSize, height: iconSize)
      configuration.title
    }
  }
}

extension ButtonStyle where Self == VariantButtonStyle {
  public static func variant(
    _ variant: VariantButtonStyle.Variant = .default,
    size: VariantButtonStyle.Size = .default,
    block: Bool = false
  ) -> VariantButtonStyle {
    VariantButtonStyle(variant, size: size, block: block)
  }
}
```

```swift title="swift/Components/ButtonGroup.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry var buttonGroup: Axis? = nil
  @Entry var buttonGroupSize: CGSize = .zero
}

enum ButtonGroupSpace: Hashable {
  case group
}

struct ButtonGroupFrame {
  let bounds: Anchor<CGRect>
  let outlined: Bool
}

struct ButtonGroupFramesKey: PreferenceKey {
  static var defaultValue: [ButtonGroupFrame] { [] }

  static func reduce(value: inout [ButtonGroupFrame], nextValue: () -> [ButtonGroupFrame]) {
    value.append(contentsOf: nextValue())
  }
}

struct ButtonGroupNestedKey: PreferenceKey {
  static var defaultValue: Bool { false }

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct ButtonGroup<Content: View>: View {
  let orientation: Axis
  let content: Content

  @State private var nested = false
  @State private var size: CGSize = .zero

  public init(orientation: Axis = .horizontal, @ViewBuilder content: () -> Content) {
    self.orientation = orientation
    self.content = content()
  }

  public var body: some View {
    let shape = orientation == .horizontal
      ? AnyShape(Capsule())
      : AnyShape(RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous))
    stack
      .coordinateSpace(.named(ButtonGroupSpace.group))
      .onGeometryChange(for: CGSize.self) { $0.size } action: { size = $0 }
      .environment(\.buttonGroup, nested ? nil : orientation)
      .environment(\.buttonGroupSize, size)
      .onPreferenceChange(ButtonGroupNestedKey.self) { nested = $0 }
      .modifier(ButtonGroupClip(shape: nested ? nil : shape))
      .overlayPreferenceValue(ButtonGroupFramesKey.self) { frames in
        if !nested {
          GeometryReader { proxy in
            outline(frames.map { (proxy[$0.bounds], $0.outlined) }, shape: shape)
          }
        }
      }
      .transformPreference(ButtonGroupFramesKey.self) { $0 = [] }
      .transformPreference(ButtonGroupNestedKey.self) { $0 = true }
      .fixedSize(horizontal: orientation == .vertical, vertical: orientation == .horizontal)
      .accessibilityElement(children: .contain)
  }

  @ViewBuilder private var stack: some View {
    switch orientation {
    case .horizontal:
      HStack(spacing: nested ? 8 : 0) { content }
    case .vertical:
      VStack(spacing: nested ? 8 : 0) { content }
    }
  }

  @ViewBuilder private func outline(_ frames: [(CGRect, Bool)], shape: AnyShape) -> some View {
    if frames.contains(where: \.1) {
      ZStack(alignment: .topLeading) {
        shape
          .stroke(Color.separator, lineWidth: 1)
          .padding(0.5)
          .mask {
            Path { path in
              for (rect, outlined) in frames where outlined {
                path.addRect(rect)
              }
            }
          }
        ForEach(Array(frames.dropLast().enumerated()), id: \.offset) { _, frame in
          if frame.1 {
            divider(frame.0)
          }
        }
      }
      .clipShape(shape)
      .allowsHitTesting(false)
    }
  }

  private func divider(_ rect: CGRect) -> some View {
    let horizontal = orientation == .horizontal
    return Rectangle()
      .fill(Color.separator)
      .frame(width: horizontal ? 1 : rect.width, height: horizontal ? rect.height : 1)
      .position(
        x: horizontal ? rect.maxX - 0.5 : rect.midX,
        y: horizontal ? rect.midY : rect.maxY - 0.5
      )
  }
}

struct ButtonGroupItem<Content: View>: View {
  let radius: CGFloat
  let content: (UnevenRoundedRectangle) -> Content

  @State private var frame: CGRect = .zero
  @Environment(\.buttonGroup) private var group
  @Environment(\.buttonGroupSize) private var groupSize

  init(radius: CGFloat, @ViewBuilder content: @escaping (UnevenRoundedRectangle) -> Content) {
    self.radius = radius
    self.content = content
  }

  var body: some View {
    if let group {
      content(shape(group))
        .onGeometryChange(for: CGRect.self) { $0.frame(in: .named(ButtonGroupSpace.group)) } action: { frame = $0 }
    } else {
      content(UnevenRoundedRectangle(cornerRadii: RectangleCornerRadii(
        topLeading: radius,
        bottomLeading: radius,
        bottomTrailing: radius,
        topTrailing: radius
      ), style: .continuous))
    }
  }

  private func shape(_ group: Axis) -> UnevenRoundedRectangle {
    let horizontal = group == .horizontal
    let first = horizontal ? frame.minX <= 0.5 : frame.minY <= 0.5
    let last = horizontal
      ? frame.maxX >= groupSize.width - 0.5
      : frame.maxY >= groupSize.height - 0.5
    let round = horizontal ? frame.height / 2 : Radius.xl2
    let start: CGFloat = first ? round : 0
    let end: CGFloat = last ? round : 0
    let radii = horizontal
      ? RectangleCornerRadii(topLeading: start, bottomLeading: start, bottomTrailing: end, topTrailing: end)
      : RectangleCornerRadii(topLeading: start, bottomLeading: end, bottomTrailing: end, topTrailing: start)
    return UnevenRoundedRectangle(cornerRadii: radii, style: .continuous)
  }
}

private struct ButtonGroupClip: ViewModifier {
  let shape: AnyShape?

  func body(content: Content) -> some View {
    if let shape {
      content.clipShape(shape)
    } else {
      content
    }
  }
}

public struct ButtonGroupText<Content: View>: View {
  let content: Content

  @Environment(\.buttonGroup) private var group

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    let shape = group == nil ? AnyShape(Capsule()) : AnyShape(Rectangle())
    HStack(spacing: 8) {
      content
    }
    .labelStyle(ButtonLabelStyle(spacing: 8, iconSize: 16))
    .scaledFont(.sm)
    .lineLimit(1)
    .foregroundStyle(Color.label)
    .padding(.horizontal, 10)
    .frame(minHeight: 36)
    .frame(maxWidth: group == .vertical ? .infinity : nil, maxHeight: group == .horizontal ? .infinity : nil)
    .background(Color.control, in: shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      group == nil ? [] : [ButtonGroupFrame(bounds: anchor, outlined: false)]
    }
  }
}

extension ButtonGroupText where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }

  public init(verbatim title: String) {
    self.init { Text(verbatim: title) }
  }
}

public struct ButtonGroupSeparator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .vertical) {
    self.orientation = orientation
  }

  public var body: some View {
    let vertical = orientation == .vertical
    Rectangle()
      .fill(Color.label.opacity(0.2))
      .frame(width: vertical ? 1 : nil, height: vertical ? nil : 1)
      .padding(vertical ? .vertical : .horizontal, 9)
      .frame(maxWidth: vertical ? nil : .infinity, maxHeight: vertical ? .infinity : nil)
      .padding(vertical ? .trailing : .bottom, -1)
      .zIndex(1)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Checkbox.swift"
import PhosphorSwift
import SwiftUI

extension Shadow {
  static let control = Shadow(color: .black.opacity(0.08), radius: 0.5, y: 0.5)
  static let thumb = Shadow(color: .black.opacity(0.12), radius: 1.5, y: 1)
}

struct SelectionIndicator<Mark: View>: View {
  let checked: Bool
  let pressed: Bool
  let cornerRadius: CGFloat
  let mark: Mark

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  init(checked: Bool, pressed: Bool, cornerRadius: CGFloat, @ViewBuilder mark: () -> Mark) {
    self.checked = checked
    self.pressed = pressed
    self.cornerRadius = cornerRadius
    self.mark = mark()
  }

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: cornerRadius, style: .continuous)
    ZStack {
      shape.fill(fill)
      shape.strokeBorder(border, lineWidth: 1)
      if checked {
        mark
      }
    }
    .frame(width: 16, height: 16)
    .shadow(raised ? .control : Shadow(color: .clear, radius: 0))
  }

  private var isDark: Bool { colorScheme == .dark }

  private var raised: Bool { !checked && isEnabled && !isDark }

  private var fill: Color {
    if checked {
      return !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return .controlDisabled }
    if isDark { return pressed ? .labelTertiary.opacity(0.6) : .labelQuaternary }
    return pressed ? .control : .surface
  }

  private var border: Color {
    if checked {
      return !isEnabled ? .clear : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return isDark ? .clear : .label.opacity(0.1) }
    if invalid { return .danger }
    return isDark ? .clear : .label.opacity(0.25)
  }
}

struct PressReader<Content: View>: ButtonStyle {
  let content: (Bool) -> Content

  init(@ViewBuilder content: @escaping (Bool) -> Content) {
    self.content = content
  }

  func makeBody(configuration: Configuration) -> some View {
    content(configuration.isPressed)
  }
}

public struct CheckboxStyle: ToggleStyle {
  public init() {}

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      HStack(spacing: 12) {
        SelectionIndicator(
          checked: configuration.isOn || configuration.isMixed,
          pressed: pressed,
          cornerRadius: 4
        ) {
          (configuration.isMixed ? Ph.minus.regular : Ph.check.regular)
            .frame(width: 14, height: 14)
            .foregroundStyle(Color.onAccent)
        }
        configuration.label
      }
      .contentShape(Rectangle().inset(by: -8))
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityElement(children: .combine)
    .accessibilityRemoveTraits(.isButton)
    .accessibilityAddTraits(.isToggle)
    .accessibilityValue(
      configuration.isMixed
        ? Text("Mixed")
        : configuration.isOn ? Text("Checked") : Text("Unchecked")
    )
  }
}

extension ToggleStyle where Self == CheckboxStyle {
  public static var checkbox: CheckboxStyle { CheckboxStyle() }
}
```

```swift title="swift/Components/DropdownMenu.swift"
import PhosphorSwift
import SwiftUI

enum MenuPresentation: Sendable {
  case system, popup
}

extension EnvironmentValues {
  @Entry var menuPresentation: MenuPresentation = .system
  @Entry var menuRadio = MenuRadioContext()
}

struct MenuRadioContext: @unchecked Sendable {
  var selected: AnyHashable?
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

public struct DropdownMenu<Label: View, Content: View>: View {
  let side: Edge
  let align: PopupAlignment
  let sideOffset: CGFloat
  let alignOffset: CGFloat
  let external: Binding<Bool>?
  let content: () -> Content
  let label: Label

  @State private var local = false

  public init(
    isPresented: Binding<Bool>? = nil,
    side: Edge = .bottom,
    align: PopupAlignment = .start,
    sideOffset: CGFloat = 4,
    alignOffset: CGFloat = 0,
    @ViewBuilder content: @escaping () -> Content,
    @ViewBuilder label: () -> Label
  ) {
    self.external = isPresented
    self.side = side
    self.align = align
    self.sideOffset = sideOffset
    self.alignOffset = alignOffset
    self.content = content
    self.label = label()
  }

  public var body: some View {
    let binding = external ?? $local
    Button {
      binding.wrappedValue = true
    } label: {
      label
    }
    .accessibilityHint(Text("Opens a menu"))
    .anchoredPopup(
      isPresented: binding,
      side: side,
      align: align,
      sideOffset: sideOffset,
      alignOffset: alignOffset,
      minWidth: 192
    ) {
      MenuPanel(content: content)
    }
  }
}

extension DropdownMenu where Label == Text {
  public init(
    _ title: LocalizedStringKey,
    isPresented: Binding<Bool>? = nil,
    side: Edge = .bottom,
    align: PopupAlignment = .start,
    @ViewBuilder content: @escaping () -> Content
  ) {
    self.init(isPresented: isPresented, side: side, align: align, content: content) { Text(title) }
  }
}

struct MenuPanel<Content: View>: View {
  @ViewBuilder let content: () -> Content

  var body: some View {
    let stack = VStack(alignment: .leading, spacing: 0) {
      content()
    }
    .padding(6)
    ViewThatFits(in: .vertical) {
      stack
      ScrollView { stack }
    }
    .font(TextStyle.base.font())
    .tracking(TextStyle.base.letterSpacing)
    .foregroundStyle(Color.label)
    .environment(\.menuPresentation, .popup)
    .popupSurface(radius: Radius.xl)
    .accessibilityElement(children: .contain)
  }
}

struct MenuRowStyle: ButtonStyle {
  var destructive = false
  var inset = false
  var trailing: CGFloat = 12
  var selected = false

  @Environment(\.isEnabled) private var isEnabled

  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .labelStyle(ButtonLabelStyle(spacing: 10, iconSize: 16))
      .lineLimit(1)
      .foregroundStyle(!isEnabled ? Color.labelQuaternary : destructive ? .danger : .label)
      .padding(.leading, inset ? 38 : 12)
      .padding(.trailing, trailing)
      .padding(.vertical, 8)
      .frame(maxWidth: .infinity, alignment: .leading)
      .background(background(pressed: configuration.isPressed), in: RoundedRectangle(cornerRadius: Radius.md, style: .continuous))
      .contentShape(Rectangle())
  }

  private func background(pressed: Bool) -> Color {
    if pressed && isEnabled {
      return destructive ? .dangerSurfacePressed : .itemPressed
    }
    return selected ? .itemSelected : .clear
  }
}

private struct MenuCheckmark: View {
  let visible: Bool

  var body: some View {
    Ph.check.regular
      .frame(width: 16, height: 16)
      .opacity(visible ? 1 : 0)
      .padding(.trailing, 8)
      .accessibilityHidden(true)
  }
}

public struct DropdownMenuItem<Label: View>: View {
  public enum Variant: CaseIterable, Sendable {
    case `default`, destructive
  }

  let variant: Variant
  let inset: Bool
  let action: () -> Void
  let label: Label

  @Environment(\.menuPresentation) private var presentation
  @Environment(\.overlayDismiss) private var dismiss

  public init(
    variant: Variant = .default,
    inset: Bool = false,
    action: @escaping () -> Void,
    @ViewBuilder label: () -> Label
  ) {
    self.variant = variant
    self.inset = inset
    self.action = action
    self.label = label()
  }

  public var body: some View {
    if presentation == .system {
      Button(role: variant == .destructive ? .destructive : nil, action: action) {
        label
      }
    } else {
      Button {
        action()
        dismiss?()
      } label: {
        HStack(spacing: 10) {
          label
        }
      }
      .buttonStyle(MenuRowStyle(destructive: variant == .destructive, inset: inset))
    }
  }
}

extension DropdownMenuItem where Label == Text {
  public init(
    _ title: LocalizedStringKey,
    variant: Variant = .default,
    inset: Bool = false,
    action: @escaping () -> Void
  ) {
    self.init(variant: variant, inset: inset, action: action) { Text(title) }
  }
}

extension DropdownMenuItem where Label == SwiftUI.Label<Text, Image> {
  public init(
    _ title: LocalizedStringKey,
    icon: Image,
    variant: Variant = .default,
    action: @escaping () -> Void
  ) {
    self.init(variant: variant, action: action) {
      SwiftUI.Label { Text(title) } icon: { icon }
    }
  }
}

public struct DropdownMenuCheckboxItem<Label: View>: View {
  let isOn: Binding<Bool>
  let inset: Bool
  let label: Label

  @Environment(\.menuPresentation) private var presentation

  public init(isOn: Binding<Bool>, inset: Bool = false, @ViewBuilder label: () -> Label) {
    self.isOn = isOn
    self.inset = inset
    self.label = label()
  }

  public var body: some View {
    if presentation == .system {
      Toggle(isOn: isOn) { label }
    } else {
      Button {
        isOn.wrappedValue.toggle()
      } label: {
        label
      }
      .buttonStyle(MenuRowStyle(inset: inset, trailing: 32))
      .overlay(alignment: .trailing) { MenuCheckmark(visible: isOn.wrappedValue) }
      .accessibilityAddTraits(isOn.wrappedValue ? [.isToggle, .isSelected] : .isToggle)
    }
  }
}

extension DropdownMenuCheckboxItem where Label == Text {
  public init(_ title: LocalizedStringKey, isOn: Binding<Bool>, inset: Bool = false) {
    self.init(isOn: isOn, inset: inset) { Text(title) }
  }
}

public struct DropdownMenuRadioGroup<Content: View>: View {
  let selection: Binding<AnyHashable>
  let content: Content

  public init<Value: Hashable & Sendable>(selection: Binding<Value>, @ViewBuilder content: () -> Content) {
    self.selection = Binding(
      get: { AnyHashable(selection.wrappedValue) },
      set: { value in
        if let value = value.base as? Value { selection.wrappedValue = value }
      }
    )
    self.content = content()
  }

  public var body: some View {
    let binding = selection
    content
      .environment(
        \.menuRadio,
        MenuRadioContext(selected: binding.wrappedValue, select: { binding.wrappedValue = $0 })
      )
  }
}

public struct DropdownMenuRadioItem<Label: View>: View {
  let value: AnyHashable
  let inset: Bool
  let label: Label

  @Environment(\.menuPresentation) private var presentation
  @Environment(\.menuRadio) private var radio

  public init<Value: Hashable & Sendable>(value: Value, inset: Bool = false, @ViewBuilder label: () -> Label) {
    self.value = AnyHashable(value)
    self.inset = inset
    self.label = label()
  }

  public var body: some View {
    let selected = radio.selected == value
    if presentation == .system {
      let radio = radio
      let value = value
      Toggle(isOn: Binding(get: { selected }, set: { if $0 { radio.select(value) } })) { label }
    } else {
      Button {
        radio.select(value)
      } label: {
        label
      }
      .buttonStyle(MenuRowStyle(inset: inset, trailing: 32))
      .overlay(alignment: .trailing) { MenuCheckmark(visible: selected) }
      .accessibilityAddTraits(selected ? .isSelected : [])
    }
  }
}

extension DropdownMenuRadioItem where Label == Text {
  public init<Value: Hashable & Sendable>(_ title: LocalizedStringKey, value: Value, inset: Bool = false) {
    self.init(value: value, inset: inset) { Text(title) }
  }
}

public struct DropdownMenuLabel: View {
  let title: LocalizedStringKey
  let inset: Bool

  @Environment(\.menuPresentation) private var presentation

  public init(_ title: LocalizedStringKey, inset: Bool = false) {
    self.title = title
    self.inset = inset
  }

  public var body: some View {
    if presentation == .system {
      Text(title)
    } else {
      Text(title)
        .font(TextStyle.xs.font(weight: .semibold))
        .tracking(TextStyle.xs.letterSpacing)
        .foregroundStyle(Color.labelSecondary)
        .padding(.leading, inset ? 38 : 12)
        .padding(.trailing, 12)
        .padding(.vertical, 10)
        .frame(maxWidth: .infinity, alignment: .leading)
        .accessibilityAddTraits(.isHeader)
    }
  }
}

public struct DropdownMenuGroup<Content: View>: View {
  let content: Content

  @Environment(\.menuPresentation) private var presentation

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    if presentation == .system {
      Section { content }
    } else {
      VStack(alignment: .leading, spacing: 0) { content }
    }
  }
}

public struct DropdownMenuSeparator: View {
  @Environment(\.menuPresentation) private var presentation

  public init() {}

  public var body: some View {
    if presentation == .system {
      Divider()
    } else {
      Rectangle()
        .fill(Color.separator.opacity(0.5))
        .frame(height: 1)
        .padding(.vertical, 6)
        .padding(.horizontal, -6)
        .accessibilityHidden(true)
    }
  }
}

public struct DropdownMenuSub<Label: View, Content: View>: View {
  let inset: Bool
  let content: Content
  let label: Label

  @State private var open = false
  @Environment(\.menuPresentation) private var presentation
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(inset: Bool = false, @ViewBuilder content: () -> Content, @ViewBuilder label: () -> Label) {
    self.inset = inset
    self.content = content()
    self.label = label()
  }

  public var body: some View {
    if presentation == .system {
      Menu { content } label: { label }
    } else {
      VStack(alignment: .leading, spacing: 0) {
        Button {
          withAnimation(reduceMotion ? nil : .easeInOut(duration: 0.2)) { open.toggle() }
        } label: {
          HStack(spacing: 8) {
            label
            Spacer(minLength: 16)
            Ph.caretRight.regular
              .frame(width: 16, height: 16)
              .rotationEffect(.degrees(open ? 90 : 0))
          }
        }
        .buttonStyle(MenuRowStyle(inset: inset, selected: open))
        .accessibilityValue(Text(open ? "Expanded" : "Collapsed"))
        if open {
          VStack(alignment: .leading, spacing: 0) { content }
            .padding(.leading, 12)
            .transition(.opacity)
        }
      }
    }
  }
}

extension DropdownMenuSub where Label == Text {
  public init(_ title: LocalizedStringKey, inset: Bool = false, @ViewBuilder content: () -> Content) {
    self.init(inset: inset, content: content) { Text(title) }
  }
}

extension DropdownMenuSub where Label == SwiftUI.Label<Text, Image> {
  public init(_ title: LocalizedStringKey, icon: Image, @ViewBuilder content: () -> Content) {
    self.init(content: content) {
      SwiftUI.Label { Text(title) } icon: { icon }
    }
  }
}
```

```swift title="swift/Components/Empty.swift"
import SwiftUI

public struct Empty<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(spacing: 16) {
      content
    }
    .multilineTextAlignment(.center)
    .padding(48)
    .frame(maxWidth: .infinity, maxHeight: .infinity)
    .accessibilityElement(children: .contain)
  }
}

public struct EmptyHeader<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(spacing: 8) {
      content
    }
    .frame(maxWidth: 384)
  }
}

public enum EmptyMediaVariant: CaseIterable, Sendable {
  case `default`, icon
}

public struct EmptyMedia<Content: View>: View {
  let variant: EmptyMediaVariant
  let content: Content

  public init(_ variant: EmptyMediaVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    Group {
      switch variant {
      case .default:
        content
      case .icon:
        content
          .frame(width: 20, height: 20)
          .foregroundStyle(Color.label)
          .frame(width: 40, height: 40)
          .background(Color.surfaceSecondary, in: RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
      }
    }
    .padding(.bottom, 8)
    .accessibilityHidden(true)
  }
}

public struct EmptyTitle: View {
  let text: Text

  public init(_ title: LocalizedStringKey) {
    text = Text(title)
  }

  public init(verbatim title: String) {
    text = Text(verbatim: title)
  }

  public var body: some View {
    text
      .scaledTextStyle(.lg, weight: .semibold)
      .foregroundStyle(Color.label)
      .fixedSize(horizontal: false, vertical: true)
      .accessibilityAddTraits(.isHeader)
  }
}

public struct EmptyDescription: View {
  let text: Text

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init(verbatim description: String) {
    text = Text(verbatim: description)
  }

  public var body: some View {
    text
      .scaledTextStyle(TextStyle(size: TextStyle.sm.size, lineHeight: 24, letterSpacing: TextStyle.sm.letterSpacing))
      .foregroundStyle(Color.labelSecondary)
      .tint(Color.link)
      .fixedSize(horizontal: false, vertical: true)
  }
}

public struct EmptyContent<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(spacing: 16) {
      content
    }
    .scaledFont(.base)
    .foregroundStyle(Color.label)
    .frame(maxWidth: 384)
  }
}
```

```swift title="swift/Components/Field.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry public var isInvalid = false
  @Entry var fieldInset = false
  @Entry var fieldGroupInset = false
  @Entry var fieldSetInset = false
}

extension View {
  public func invalid(_ isInvalid: Bool = true) -> some View {
    environment(\.isInvalid, isInvalid)
  }
}

public enum FieldOrientation: CaseIterable, Sendable {
  case vertical, horizontal
}

public struct Field<Content: View>: View {
  let orientation: FieldOrientation
  let invalid: Bool?
  let content: Content

  @Environment(\.fieldGroupInset) private var inset
  @Environment(\.isInvalid) private var inheritedInvalid

  public init(
    orientation: FieldOrientation = .vertical,
    invalid: Bool? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.orientation = orientation
    self.invalid = invalid
    self.content = content()
  }

  public var body: some View {
    Group {
      switch orientation {
      case .vertical:
        VStack(alignment: .leading, spacing: 12) { content }
      case .horizontal:
        HStack(alignment: .center, spacing: 12) { content }
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .padding(.horizontal, inset ? 16 : 0)
    .padding(.vertical, inset ? 6 : 0)
    .frame(minHeight: inset ? 44 : nil)
    .overlay(alignment: .top) {
      if inset {
        Color.separator
          .frame(height: 1)
          .padding(.leading, 16)
          .offset(y: -1)
      }
    }
    .environment(\.fieldInset, inset)
    .environment(\.fieldGroupInset, false)
    .environment(\.isInvalid, invalid ?? inheritedInvalid)
  }
}

public struct FieldContent<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 4) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

public struct FieldTitle: View {
  let text: Text

  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey) {
    text = Text(title)
  }

  public init<S: StringProtocol>(_ title: S) {
    text = Text(title)
  }

  public var body: some View {
    text
      .scaledTextStyle(.base, weight: .semibold)
      .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
  }
}

public struct FieldDescription: View {
  let text: Text

  @Environment(\.fieldSetInset) private var inset

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init<S: StringProtocol>(_ description: S) {
    text = Text(description)
  }

  public var body: some View {
    text
      .scaledTextStyle(inset ? .xs : .sm)
      .foregroundStyle(Color.labelSecondary)
      .multilineTextAlignment(.leading)
      .fixedSize(horizontal: false, vertical: true)
      .padding(.leading, inset ? 16 : 0)
  }
}

public struct FieldError: View {
  let messages: [String]
  let text: Text?

  public init(_ message: LocalizedStringKey) {
    messages = []
    text = Text(message)
  }

  public init(errors: [String?]) {
    var seen = Set<String>()
    messages = errors.compactMap { $0 }.filter { !$0.isEmpty && seen.insert($0).inserted }
    text = nil
  }

  public var body: some View {
    if let content {
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.danger)
        .multilineTextAlignment(.leading)
        .fixedSize(horizontal: false, vertical: true)
    }
  }

  private var content: Text? {
    if let text { return text }
    switch messages.count {
    case 0: return nil
    case 1: return Text(verbatim: messages[0])
    default: return Text(verbatim: messages.map { "\u{2022} \($0)" }.joined(separator: "\n"))
    }
  }
}

public enum FieldGroupVariant: CaseIterable, Sendable {
  case `default`, inset
}

public struct FieldGroup<Content: View>: View {
  let variant: FieldGroupVariant
  let content: Content

  public init(_ variant: FieldGroupVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    styled
      .environment(\.fieldGroupInset, variant == .inset)
      .environment(\.fieldSetInset, false)
      .transformPreference(FieldSetInsetKey.self) { $0 = variant == .inset }
  }

  @ViewBuilder private var styled: some View {
    let stack = VStack(alignment: .leading, spacing: variant == .inset ? 0 : 28) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    if variant == .inset {
      let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
      stack
        .background(Color.surfaceSecondary, in: shape)
        .clipShape(shape)
    } else {
      stack
    }
  }
}

struct FieldSetInsetKey: PreferenceKey {
  static let defaultValue = false

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct FieldSet<Content: View>: View {
  let content: Content

  @State private var inset = false

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: inset ? 8 : 24) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.fieldSetInset, inset)
    .onPreferenceChange(FieldSetInsetKey.self) { inset = $0 }
    .transformPreference(FieldSetInsetKey.self) { $0 = false }
    .accessibilityElement(children: .contain)
  }
}

public struct FieldLegend: View {
  public enum Variant: CaseIterable, Sendable {
    case legend, label
  }

  let text: Text
  let variant: Variant

  @Environment(\.fieldSetInset) private var inset
  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public init<S: StringProtocol>(_ title: S, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public var body: some View {
    Group {
      if inset {
        text
          .textCase(.uppercase)
          .scaledTextStyle(.xs)
          .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
          .padding(.leading, 16)
      } else {
        text
          .scaledTextStyle(.base, weight: .semibold)
          .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          .padding(.bottom, 12)
      }
    }
    .accessibilityAddTraits(variant == .legend ? .isHeader : [])
  }
}

public struct FieldSeparator<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    ZStack {
      Separator()
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 8)
        .background(Color.surface)
    }
    .frame(minHeight: 20)
    .padding(.vertical, -8)
  }
}

extension FieldSeparator where Content == EmptyView {
  public init() {
    self.init { EmptyView() }
  }
}

extension FieldSeparator where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }
}
```

```swift title="swift/Components/Haptics.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry public var hapticsEnabled = true
}

extension View {
  public func haptics(_ enabled: Bool) -> some View {
    environment(\.hapticsEnabled, enabled)
  }

  func hapticFeedback<Trigger: Equatable>(_ feedback: SensoryFeedback, trigger: Trigger) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger) { _, _ in true })
  }

  func hapticFeedback<Trigger: Equatable>(
    _ feedback: SensoryFeedback,
    trigger: Trigger,
    condition: @escaping (Trigger, Trigger) -> Bool
  ) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger, condition: condition))
  }
}

private struct HapticFeedbackModifier<Trigger: Equatable>: ViewModifier {
  let feedback: SensoryFeedback
  let trigger: Trigger
  let condition: (Trigger, Trigger) -> Bool

  @Environment(\.hapticsEnabled) private var enabled

  func body(content: Content) -> some View {
    let enabled = enabled
    let condition = condition
    content.sensoryFeedback(feedback, trigger: trigger) { old, new in
      enabled && condition(old, new)
    }
  }
}

enum HapticMoments {
  static func step(_ value: Double, bounds: ClosedRange<Double>, step: Double?) -> Int? {
    guard let step, step > 0 else { return nil }
    return Int(((value - bounds.lowerBound) / step).rounded())
  }

  static func lifted<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    new != nil && old != new
  }

  static func crossed<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    old == nil && new != nil
  }

  static func moved(_ old: Int?, _ new: Int?) -> Bool {
    guard let old, let new else { return false }
    return old != new
  }
}

struct HapticButton<Style: ButtonStyle>: View {
  let feedback: SensoryFeedback
  let action: () -> Bool
  let style: Style

  @State private var count = 0

  init(_ feedback: SensoryFeedback = .selection, style: Style, action: @escaping () -> Bool) {
    self.feedback = feedback
    self.style = style
    self.action = action
  }

  var body: some View {
    Button {
      if action() { count += 1 }
    } label: {
      EmptyView()
    }
    .buttonStyle(style)
    .hapticFeedback(feedback, trigger: count)
  }
}
```

```swift title="swift/Components/Item.swift"
import SwiftUI

public enum ItemVariant: CaseIterable, Sendable {
  case `default`, outline, muted
}

public enum ItemSize: CaseIterable, Sendable {
  case `default`, sm, xs

  var horizontalPadding: CGFloat {
    switch self {
    case .default: 16
    case .sm: 14
    case .xs: 12
    }
  }

  var verticalPadding: CGFloat {
    switch self {
    case .default: 14
    case .sm: 12
    case .xs: 10
    }
  }

  var gap: CGFloat {
    self == .xs ? 10 : 14
  }

  var groupGap: CGFloat {
    switch self {
    case .default: 16
    case .sm: 10
    case .xs: 8
    }
  }

  var mediaImage: CGFloat {
    switch self {
    case .default: 40
    case .sm: 32
    case .xs: 24
    }
  }
}

public enum ItemGroupVariant: CaseIterable, Sendable {
  case `default`, inset
}

extension EnvironmentValues {
  @Entry var itemSize: ItemSize = .default
  @Entry var itemGroupInset = false
  @Entry var itemHasDescription = false
}

struct ItemGapKey: PreferenceKey {
  static var defaultValue: CGFloat? { nil }

  static func reduce(value: inout CGFloat?, nextValue: () -> CGFloat?) {
    guard let next = nextValue() else { return }
    value = min(value ?? next, next)
  }
}

struct ItemDescriptionKey: PreferenceKey {
  static var defaultValue: Bool { false }

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

enum ItemSlot: Sendable {
  case media, content, actions, fullRow, other
}

struct ItemSlotKey: LayoutValueKey {
  static let defaultValue = ItemSlot.other
}

public struct ItemGroup<Content: View>: View {
  let variant: ItemGroupVariant
  let content: Content

  @State private var gap: CGFloat?

  public init(_ variant: ItemGroupVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    let inset = variant == .inset
    let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
    VStack(alignment: .leading, spacing: inset ? 0 : gap ?? ItemSize.default.groupGap) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.itemGroupInset, inset)
    .onPreferenceChange(ItemGapKey.self) { gap = $0 }
    .transformPreference(ItemGapKey.self) { $0 = nil }
    .background(inset ? Color.surfaceSecondary : .clear, in: shape)
    .clipShape(inset ? AnyShape(shape) : AnyShape(Rectangle()))
    .accessibilityElement(children: .contain)
  }
}

public struct ItemSeparator: View {
  @Environment(\.itemGroupInset) private var inset

  public init() {}

  public var body: some View {
    Separator()
      .padding(.vertical, inset ? 0 : 8)
      .padding(.leading, inset ? 16 : 0)
  }
}

public struct Item<Content: View>: View {
  let variant: ItemVariant
  let size: ItemSize
  let action: (() -> Void)?
  let content: Content

  @State private var hasDescription = false
  @Environment(\.itemGroupInset) private var inset

  public init(
    _ variant: ItemVariant = .default,
    size: ItemSize = .default,
    action: (() -> Void)? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.variant = variant
    self.size = size
    self.action = action
    self.content = content()
  }

  public var body: some View {
    Group {
      if let action {
        Button(action: action) {
          surface
        }
        .buttonStyle(ItemButtonStyle(variant: variant, inset: inset))
      } else {
        surface.background(ItemBackground(variant: variant, inset: inset, pressed: false))
      }
    }
    .preference(key: ItemGapKey.self, value: size.groupGap)
  }

  private var surface: some View {
    ItemLayout(gap: size.gap, topAlignMedia: hasDescription) {
      content
    }
    .scaledFont(.base)
    .foregroundStyle(Color.label)
    .padding(.horizontal, size.horizontalPadding)
    .padding(.vertical, size.verticalPadding)
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.itemSize, size)
    .environment(\.itemHasDescription, hasDescription)
    .onPreferenceChange(ItemDescriptionKey.self) { hasDescription = $0 }
    .contentShape(Rectangle())
  }
}

private struct ItemBackground: View {
  let variant: ItemVariant
  let inset: Bool
  let pressed: Bool

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: inset ? 0 : Radius.xl, style: .continuous)
    ZStack {
      shape.fill(variant == .muted ? Color.surfaceSecondary.opacity(0.5) : .clear)
      if pressed {
        shape.fill(Color.itemPressed)
      }
      if variant == .outline {
        shape.strokeBorder(Color.separator)
      }
    }
  }
}

private struct ItemButtonStyle: ButtonStyle {
  let variant: ItemVariant
  let inset: Bool

  @Environment(\.isEnabled) private var isEnabled

  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .background(ItemBackground(variant: variant, inset: inset, pressed: configuration.isPressed && isEnabled))
      .opacity(isEnabled ? 1 : 0.5)
  }
}

struct ItemLayout: Layout {
  var gap: CGFloat
  var topAlignMedia: Bool

  private struct Line {
    var indices: [Int]
    var full: Bool
  }

  private func lines(_ subviews: Subviews) -> [Line] {
    var result: [Line] = []
    var current: [Int] = []
    for index in subviews.indices {
      if subviews[index][ItemSlotKey.self] == .fullRow {
        if !current.isEmpty { result.append(Line(indices: current, full: false)) }
        current = []
        result.append(Line(indices: [index], full: true))
      } else {
        current.append(index)
      }
    }
    if !current.isEmpty { result.append(Line(indices: current, full: false)) }
    return result
  }

  private func widths(_ line: Line, subviews: Subviews, width: CGFloat?) -> [CGFloat] {
    if line.full {
      return [width ?? subviews[line.indices[0]].sizeThatFits(.unspecified).width]
    }
    let spacing = gap * CGFloat(max(line.indices.count - 1, 0))
    let flexible = line.indices.first { subviews[$0][ItemSlotKey.self] == .content }
    var fixed: [Int: CGFloat] = [:]
    for index in line.indices where index != flexible {
      fixed[index] = subviews[index].sizeThatFits(.unspecified).width
    }
    let used = fixed.values.reduce(0, +) + spacing
    return line.indices.map { index in
      if index == flexible {
        if let width { return max(width - used, 0) }
        return subviews[index].sizeThatFits(.unspecified).width
      }
      return fixed[index] ?? 0
    }
  }

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    var height: CGFloat = 0
    var widest: CGFloat = 0
    let all = lines(subviews)
    for (position, line) in all.enumerated() {
      let sizes = widths(line, subviews: subviews, width: proposal.width)
      var lineHeight: CGFloat = 0
      for (index, width) in zip(line.indices, sizes) {
        lineHeight = max(lineHeight, subviews[index].sizeThatFits(ProposedViewSize(width: width, height: nil)).height)
      }
      let spacing = gap * CGFloat(max(line.indices.count - 1, 0))
      widest = max(widest, sizes.reduce(0, +) + (line.full ? 0 : spacing))
      height += lineHeight + (position > 0 ? gap : 0)
    }
    return CGSize(width: proposal.width ?? widest, height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    var y = bounds.minY
    for line in lines(subviews) {
      let sizes = widths(line, subviews: subviews, width: bounds.width)
      var heights: [CGFloat] = []
      for (index, width) in zip(line.indices, sizes) {
        heights.append(subviews[index].sizeThatFits(ProposedViewSize(width: width, height: nil)).height)
      }
      let lineHeight = heights.max() ?? 0
      var x = bounds.minX
      for (offset, index) in line.indices.enumerated() {
        let width = sizes[offset]
        let height = heights[offset]
        let top = topAlignMedia && subviews[index][ItemSlotKey.self] == .media
        let originY = top ? y + 2 : y + (lineHeight - height) / 2
        subviews[index].place(
          at: CGPoint(x: x, y: originY),
          anchor: .topLeading,
          proposal: ProposedViewSize(width: width, height: height)
        )
        x += width + gap
      }
      y += lineHeight + gap
    }
  }
}

public enum ItemMediaVariant: CaseIterable, Sendable {
  case `default`, icon, image
}

public struct ItemMedia<Content: View>: View {
  let variant: ItemMediaVariant
  let content: Content

  @Environment(\.itemSize) private var size

  public init(_ variant: ItemMediaVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    Group {
      switch variant {
      case .default:
        HStack(spacing: 8) { content }
      case .icon:
        content.frame(width: 16, height: 16)
      case .image:
        content
          .scaledToFill()
          .frame(width: size.mediaImage, height: size.mediaImage)
          .clipShape(RoundedRectangle(cornerRadius: size == .xs ? Radius.sm : Radius.md, style: .continuous))
      }
    }
    .accessibilityHidden(variant != .default)
    .layoutValue(key: ItemSlotKey.self, value: .media)
  }
}

public struct ItemContent<Content: View>: View {
  let content: Content

  @Environment(\.itemSize) private var size

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: size == .xs ? 2 : 4) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .layoutValue(key: ItemSlotKey.self, value: .content)
  }
}

public struct ItemTitle<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    HStack(spacing: 8) {
      content
    }
    .scaledTextStyle(.base, weight: .semibold)
    .foregroundStyle(Color.label)
    .lineLimit(1)
    .accessibilityElement(children: .combine)
  }
}

extension ItemTitle where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }

  public init(verbatim title: String) {
    self.init { Text(verbatim: title) }
  }
}

public struct ItemDescription: View {
  let text: Text

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init(verbatim description: String) {
    text = Text(verbatim: description)
  }

  public var body: some View {
    text
      .scaledTextStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .multilineTextAlignment(.leading)
      .lineLimit(2)
      .fixedSize(horizontal: false, vertical: true)
      .preference(key: ItemDescriptionKey.self, value: true)
  }
}

public struct ItemActions<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    HStack(spacing: 8) {
      content
    }
    .fixedSize()
    .layoutValue(key: ItemSlotKey.self, value: .actions)
  }
}

public struct ItemHeader<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    SpaceBetween(spacing: 8) {
      content
    }
    .frame(maxWidth: .infinity)
    .layoutValue(key: ItemSlotKey.self, value: .fullRow)
  }
}

public struct ItemFooter<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    SpaceBetween(spacing: 8) {
      content
    }
    .frame(maxWidth: .infinity)
    .layoutValue(key: ItemSlotKey.self, value: .fullRow)
  }
}

struct SpaceBetween: Layout {
  var spacing: CGFloat

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let sizes = subviews.map { $0.sizeThatFits(.unspecified) }
    let natural = sizes.reduce(0) { $0 + $1.width } + spacing * CGFloat(max(subviews.count - 1, 0))
    return CGSize(width: proposal.width ?? natural, height: sizes.map(\.height).max() ?? 0)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    let sizes = subviews.map { $0.sizeThatFits(.unspecified) }
    let total = sizes.reduce(0) { $0 + $1.width }
    let gaps = CGFloat(max(subviews.count - 1, 0))
    let gap = subviews.count > 1 ? max(spacing, (bounds.width - total) / gaps) : 0
    var x = bounds.minX
    for (index, view) in subviews.enumerated() {
      let size = sizes[index]
      view.place(
        at: CGPoint(x: x, y: bounds.midY - size.height / 2),
        anchor: .topLeading,
        proposal: ProposedViewSize(size)
      )
      x += size.width + gap
    }
  }
}
```

```swift title="swift/Components/KeyboardScrollView.swift"
import SwiftUI
import UIKit

public struct KeyboardScrollView<Content: View>: View {
  let showsIndicators: Bool
  let content: Content

  public init(showsIndicators: Bool = true, @ViewBuilder content: () -> Content) {
    self.showsIndicators = showsIndicators
    self.content = content()
  }

  public var body: some View {
    ScrollView(.vertical, showsIndicators: showsIndicators) {
      content
        .frame(maxWidth: .infinity, alignment: .topLeading)
        .background {
          Color.clear
            .contentShape(Rectangle())
            .onTapGesture { KeyboardScrollView.dismissKeyboard() }
        }
    }
    .scrollDismissesKeyboard(.interactively)
  }

  @MainActor
  static func dismissKeyboard() {
    UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
  }
}
```

```swift title="swift/Components/Overlay.swift"
import PhosphorSwift
import Observation
import SwiftUI

public enum PopupAlignment: Sendable, CaseIterable {
  case start, center, end
}

struct OverlayDismiss: Sendable {
  let action: @MainActor @Sendable () -> Void

  @MainActor func callAsFunction() {
    action()
  }
}

extension EnvironmentValues {
  @Entry var overlayDismiss: OverlayDismiss? = nil
}

private var instantTransaction: Transaction {
  var transaction = Transaction()
  transaction.disablesAnimations = true
  return transaction
}

struct CoverPresenter<Cover: View>: ViewModifier {
  @Binding var isPresented: Bool
  var enter: Animation = .easeOut(duration: 0.15)
  var exit: Animation = .easeIn(duration: 0.1)
  @ViewBuilder let cover: (Bool) -> Cover

  @State private var presented = false
  @State private var visible = false

  func body(content: Content) -> some View {
    let binding = $isPresented
    content
      .fullScreenCover(isPresented: coverBinding) {
        cover(visible)
          .environment(\.overlayDismiss, OverlayDismiss { binding.wrappedValue = false })
          .presentationBackground(.clear)
          .onAppear {
            withAnimation(enter) { visible = true }
          }
      }
      .onChange(of: isPresented, initial: true) { _, value in
        if value {
          withTransaction(instantTransaction) { presented = true }
        } else if presented {
          withAnimation(exit) {
            visible = false
          } completion: {
            withTransaction(instantTransaction) { presented = false }
          }
        }
      }
  }

  private var coverBinding: Binding<Bool> {
    Binding(
      get: { presented },
      set: { value in
        presented = value
        if !value {
          visible = false
          isPresented = false
        }
      }
    )
  }
}

struct PopupLayout: Layout {
  var anchor: CGRect
  var side: Edge
  var align: PopupAlignment
  var sideOffset: CGFloat
  var alignOffset: CGFloat
  var matchWidth: Bool
  var minWidth: CGFloat
  var maxHeight: CGFloat
  var margin: CGFloat = 8

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    proposal.replacingUnspecifiedDimensions()
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    guard let view = subviews.first else { return }
    let anchor = anchor.offsetBy(dx: bounds.minX, dy: bounds.minY)
    let maxWidth = max(0, bounds.width - margin * 2)
    var width: CGFloat
    if matchWidth {
      width = max(anchor.width, minWidth)
    } else {
      width = max(view.sizeThatFits(ProposedViewSize(width: nil, height: nil)).width, minWidth)
    }
    width = min(width, maxWidth)
    let natural = view.sizeThatFits(ProposedViewSize(width: width, height: nil))
    let vertical = side == .top || side == .bottom
    let before = vertical
      ? anchor.minY - sideOffset - bounds.minY - margin
      : anchor.minX - sideOffset - bounds.minX - margin
    let after = vertical
      ? bounds.maxY - margin - anchor.maxY - sideOffset
      : bounds.maxX - margin - anchor.maxX - sideOffset
    let extent = vertical ? natural.height : natural.width
    var resolved = side
    switch side {
    case .bottom where extent > after && before > after: resolved = .top
    case .top where extent > before && after > before: resolved = .bottom
    case .trailing where extent > after && before > after: resolved = .leading
    case .leading where extent > before && after > before: resolved = .trailing
    default: break
    }
    var height = natural.height
    let space: CGFloat
    switch resolved {
    case .top, .leading: space = before
    case .bottom, .trailing: space = after
    }
    if vertical {
      height = min(height, maxHeight, max(space, 0))
    } else {
      height = min(height, maxHeight, bounds.height - margin * 2)
      width = min(width, max(space, 0))
    }
    var x: CGFloat
    var y: CGFloat
    if vertical {
      switch align {
      case .start: x = anchor.minX + alignOffset
      case .center: x = anchor.midX - width / 2 + alignOffset
      case .end: x = anchor.maxX - width - alignOffset
      }
      y = resolved == .bottom ? anchor.maxY + sideOffset : anchor.minY - sideOffset - height
    } else {
      switch align {
      case .start: y = anchor.minY + alignOffset
      case .center: y = anchor.midY - height / 2 + alignOffset
      case .end: y = anchor.maxY - height - alignOffset
      }
      x = resolved == .trailing ? anchor.maxX + sideOffset : anchor.minX - sideOffset - width
    }
    x = min(max(x, bounds.minX + margin), bounds.maxX - margin - width)
    y = min(max(y, bounds.minY + margin), bounds.maxY - margin - height)
    view.place(
      at: CGPoint(x: x, y: y),
      anchor: .topLeading,
      proposal: ProposedViewSize(width: width, height: height)
    )
  }
}

struct PopupPresenter<Popup: View>: ViewModifier {
  @Binding var isPresented: Bool
  var side: Edge = .bottom
  var align: PopupAlignment = .start
  var sideOffset: CGFloat = 4
  var alignOffset: CGFloat = 0
  var matchWidth = false
  var minWidth: CGFloat = 0
  var maxHeight: CGFloat = .infinity
  @ViewBuilder let popup: () -> Popup

  @State private var anchor = PopupAnchor()

  func body(content: Content) -> some View {
    content
      .onGeometryChange(for: CGRect.self) { proxy in
        proxy.frame(in: .global)
      } action: { frame in
        anchor.frame = frame
      }
      .modifier(
        CoverPresenter(isPresented: $isPresented) { visible in
          PopupCanvas(
            anchor: anchor,
            side: side,
            align: align,
            sideOffset: sideOffset,
            alignOffset: alignOffset,
            matchWidth: matchWidth,
            minWidth: minWidth,
            maxHeight: maxHeight,
            visible: visible,
            popup: popup
          )
        }
      )
  }
}

@Observable
final class PopupAnchor {
  var frame: CGRect = .zero
}

struct PopupCanvas<Popup: View>: View {
  let anchor: PopupAnchor
  let side: Edge
  let align: PopupAlignment
  let sideOffset: CGFloat
  let alignOffset: CGFloat
  let matchWidth: Bool
  let minWidth: CGFloat
  let maxHeight: CGFloat
  let visible: Bool
  @ViewBuilder let popup: () -> Popup

  @Environment(\.overlayDismiss) private var dismiss
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  var body: some View {
    GeometryReader { proxy in
      let origin = proxy.frame(in: .global).origin
      PopupLayout(
        anchor: anchor.frame.offsetBy(dx: -origin.x, dy: -origin.y),
        side: side,
        align: align,
        sideOffset: sideOffset,
        alignOffset: alignOffset,
        matchWidth: matchWidth,
        minWidth: minWidth,
        maxHeight: maxHeight
      ) {
        popup()
          .accessibilityAddTraits(.isModal)
          .scaleEffect(visible || reduceMotion ? 1 : 0.96, anchor: scaleAnchor)
          .opacity(visible ? 1 : 0)
      }
    }
    .background {
      Color.clear
        .contentShape(Rectangle())
        .ignoresSafeArea()
        .onTapGesture { dismiss?() }
        .accessibilityHidden(true)
    }
    .accessibilityAction(.escape) { dismiss?() }
  }

  private var scaleAnchor: UnitPoint {
    switch side {
    case .top: .bottom
    case .bottom: .top
    case .leading: .trailing
    case .trailing: .leading
    }
  }
}

extension View {
  func anchoredPopup<Popup: View>(
    isPresented: Binding<Bool>,
    side: Edge = .bottom,
    align: PopupAlignment = .start,
    sideOffset: CGFloat = 4,
    alignOffset: CGFloat = 0,
    matchWidth: Bool = false,
    minWidth: CGFloat = 0,
    maxHeight: CGFloat = .infinity,
    @ViewBuilder popup: @escaping () -> Popup
  ) -> some View {
    modifier(
      PopupPresenter(
        isPresented: isPresented,
        side: side,
        align: align,
        sideOffset: sideOffset,
        alignOffset: alignOffset,
        matchWidth: matchWidth,
        minWidth: minWidth,
        maxHeight: maxHeight,
        popup: popup
      )
    )
  }

  func popupSurface(radius: CGFloat = Radius.xl, shadow: Shadow = .lg) -> some View {
    modifier(PopupSurface(radius: radius, shadow: shadow))
  }
}

struct PopupSurface: ViewModifier {
  let radius: CGFloat
  let shadow: Shadow

  @Environment(\.colorScheme) private var colorScheme

  func body(content: Content) -> some View {
    let shape = RoundedRectangle(cornerRadius: radius, style: .continuous)
    content
      .clipShape(shape)
      .background {
        shape
          .fill(Color.surfaceRaised)
          .shadow(shadow)
      }
      .overlay {
        shape.strokeBorder(Color.label.opacity(colorScheme == .dark ? 0.1 : 0.05))
      }
  }
}

struct OverlayCloseButton: View {
  let label: LocalizedStringKey?

  @Environment(\.overlayDismiss) private var dismiss

  var body: some View {
    if let label {
      Button {
        dismiss?()
      } label: {
        Text(label).font(TextStyle.base.font())
      }
      .buttonStyle(.variant(.plain, size: .sm))
    } else {
      Button {
        dismiss?()
      } label: {
        Ph.x.regular
          .frame(width: 16, height: 16)
          .foregroundStyle(Color.label)
      }
      .buttonStyle(CloseIconButtonStyle())
      .accessibilityLabel(Text("Close"))
    }
  }
}

private struct CloseIconButtonStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .frame(width: 32, height: 32)
      .background(configuration.isPressed ? Color.separator : .surfaceTertiary, in: Circle())
      .contentShape(Circle().inset(by: -8))
  }
}

struct ReversedVStack: Layout {
  var spacing: CGFloat

  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let width = proposal.width
    var height: CGFloat = 0
    var widest: CGFloat = 0
    for view in subviews {
      let size = view.sizeThatFits(ProposedViewSize(width: width, height: nil))
      height += size.height
      widest = max(widest, size.width)
    }
    height += spacing * CGFloat(max(subviews.count - 1, 0))
    return CGSize(width: width ?? widest, height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    var y = bounds.minY
    for view in subviews.reversed() {
      let size = view.sizeThatFits(ProposedViewSize(width: bounds.width, height: nil))
      view.place(
        at: CGPoint(x: bounds.minX, y: y),
        anchor: .topLeading,
        proposal: ProposedViewSize(width: bounds.width, height: size.height)
      )
      y += size.height + spacing
    }
  }
}

struct ScrimLayer: View {
  let visible: Bool
  var dismissible = true

  @Environment(\.overlayDismiss) private var dismiss

  var body: some View {
    Color.scrim
      .ignoresSafeArea()
      .opacity(visible ? 1 : 0)
      .contentShape(Rectangle())
      .onTapGesture {
        if dismissible { dismiss?() }
      }
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Screen.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry var screenBackground: Color = .surface
}

public struct Screen<Content: View>: View {
  public enum Background: CaseIterable, Sendable {
    case surface, surfaceSecondary

    var color: Color {
      switch self {
      case .surface: .surface
      case .surfaceSecondary: .surfaceSecondary
      }
    }
  }

  let edges: Edge.Set
  let background: Background
  let content: Content

  public init(
    edges: Edge.Set = .all,
    background: Background = .surface,
    @ViewBuilder content: () -> Content
  ) {
    self.edges = edges
    self.background = background
    self.content = content()
  }

  public var body: some View {
    VStack(spacing: 0) {
      content
    }
    .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
    .ignoresSafeArea(.container, edges: Edge.Set.all.subtracting(edges))
    .foregroundStyle(Color.label)
    .background(background.color.ignoresSafeArea())
    .environment(\.screenBackground, background.color)
  }
}

public struct ScreenContent<Content: View>: View {
  let scroll: Bool
  let padded: Bool
  let content: Content

  public init(scroll: Bool = true, padded: Bool = true, @ViewBuilder content: () -> Content) {
    self.scroll = scroll
    self.padded = padded
    self.content = content()
  }

  public var body: some View {
    if scroll {
      KeyboardScrollView {
        stack
      }
    } else {
      stack
        .frame(maxHeight: .infinity, alignment: .top)
    }
  }

  private var stack: some View {
    VStack(alignment: .leading, spacing: 16) {
      content
    }
    .padding(padded ? 16 : 0)
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}
```

```swift title="swift/Components/Select.swift"
import PhosphorSwift
import SwiftUI

struct SelectContext: @unchecked Sendable {
  var selected: AnyHashable?
  var registering = false
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

extension EnvironmentValues {
  @Entry var select = SelectContext()
}

struct SelectLabelsKey: PreferenceKey {
  static var defaultValue: [AnyHashable: Text] { [:] }

  static func reduce(value: inout [AnyHashable: Text], nextValue: () -> [AnyHashable: Text]) {
    value.merge(nextValue()) { current, _ in current }
  }
}

public enum SelectSize: CaseIterable, Sendable {
  case `default`, sm
}

public struct SelectField<Value: Hashable & Sendable, Content: View>: View {
  public typealias Size = SelectSize

  let selection: Binding<Value?>
  let placeholder: LocalizedStringKey
  let size: Size
  let content: () -> Content

  @State private var open = false
  @State private var labels: [AnyHashable: Text] = [:]
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  public init(
    selection: Binding<Value?>,
    placeholder: LocalizedStringKey = "Select",
    size: Size = .default,
    @ViewBuilder content: @escaping () -> Content
  ) {
    self.selection = selection
    self.placeholder = placeholder
    self.size = size
    self.content = content
  }

  public var body: some View {
    let binding = selection
    let current = binding.wrappedValue.map { AnyHashable($0) }
    let valueText = current.flatMap { labels[$0] }
    let context = SelectContext(
      selected: current,
      select: { value in
        if let value = value.base as? Value { binding.wrappedValue = value }
      }
    )
    ButtonGroupItem(radius: size == .sm ? Radius.md : Radius.lg) { shape in
      Button {
        open = true
      } label: {
        HStack(spacing: 6) {
          (valueText ?? Text(placeholder))
            .font(TextStyle.base.font())
            .tracking(TextStyle.base.letterSpacing)
            .lineLimit(1)
            .foregroundStyle(!isEnabled ? Color.labelQuaternary : valueText == nil ? .labelSecondary : .label)
            .frame(maxWidth: .infinity, alignment: .leading)
          Ph.caretUpDown.regular
            .frame(width: 16, height: 16)
            .foregroundStyle(Color.labelSecondary)
            .accessibilityHidden(true)
        }
        .padding(.horizontal, 12)
        .frame(height: size == .sm ? 36 : 44)
        .background(background, in: shape)
        .overlay {
          if invalid {
            shape.strokeBorder(Color.danger)
          }
        }
        .contentShape(shape)
      }
      .buttonStyle(SelectTriggerStyle())
    }
    .accessibilityHint(Text("Shows options"))
    .background {
      VStack(spacing: 0) { content() }
        .environment(\.select, SelectContext(registering: true))
        .hidden()
        .frame(width: 0, height: 0)
        .clipped()
        .accessibilityHidden(true)
        .allowsHitTesting(false)
    }
    .onPreferenceChange(SelectLabelsKey.self) { value in
      labels = value
    }
    .anchoredPopup(
      isPresented: $open,
      side: .bottom,
      align: .center,
      matchWidth: true,
      minWidth: 144
    ) {
      SelectPanel(content: content)
        .environment(\.select, context)
    }
  }

  private var background: Color {
    if !isEnabled { return .controlDisabled }
    if invalid { return .danger.opacity(colorScheme == .dark ? 0.1 : 0.05) }
    return .control
  }
}

private struct SelectTriggerStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label.opacity(configuration.isPressed ? 0.8 : 1)
  }
}

struct SelectPanel<Content: View>: View {
  @ViewBuilder let content: () -> Content

  var body: some View {
    let stack = VStack(alignment: .leading, spacing: 0) {
      content()
    }
    .padding(6)
    ViewThatFits(in: .vertical) {
      stack
      ScrollView { stack }
    }
    .font(TextStyle.base.font())
    .tracking(TextStyle.base.letterSpacing)
    .foregroundStyle(Color.label)
    .popupSurface(radius: Radius.xl)
    .accessibilityElement(children: .contain)
  }
}

public struct SelectItem: View {
  let value: AnyHashable
  let title: Text

  @Environment(\.select) private var select
  @Environment(\.overlayDismiss) private var dismiss

  public init<Value: Hashable & Sendable>(_ title: LocalizedStringKey, value: Value) {
    self.value = AnyHashable(value)
    self.title = Text(title)
  }

  public init<Value: Hashable & Sendable>(verbatim title: String, value: Value) {
    self.value = AnyHashable(value)
    self.title = Text(verbatim: title)
  }

  public var body: some View {
    if select.registering {
      Color.clear
        .frame(width: 0, height: 0)
        .preference(key: SelectLabelsKey.self, value: [value: title])
    } else {
      let selected = select.selected == value
      Button {
        select.select(value)
        dismiss?()
      } label: {
        title
      }
      .buttonStyle(MenuRowStyle(trailing: 32))
      .overlay(alignment: .trailing) {
        if selected {
          Ph.check.regular
            .frame(width: 16, height: 16)
            .foregroundStyle(Color.link)
            .padding(.trailing, 8)
            .accessibilityHidden(true)
        }
      }
      .accessibilityAddTraits(selected ? .isSelected : [])
    }
  }
}

public struct SelectGroup<Content: View>: View {
  let content: Content

  @Environment(\.select) private var select

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 0) { content }
  }
}

public struct SelectLabel: View {
  let title: LocalizedStringKey

  @Environment(\.select) private var select

  public init(_ title: LocalizedStringKey) {
    self.title = title
  }

  public var body: some View {
    if !select.registering {
      Text(title)
        .font(TextStyle.xs.font(weight: .semibold))
        .tracking(TextStyle.xs.letterSpacing)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 12)
        .padding(.vertical, 10)
        .frame(maxWidth: .infinity, alignment: .leading)
        .accessibilityAddTraits(.isHeader)
    }
  }
}

public struct SelectSeparator: View {
  @Environment(\.select) private var select

  public init() {}

  public var body: some View {
    if !select.registering {
      Rectangle()
        .fill(Color.separator)
        .frame(height: 1)
        .padding(.vertical, 6)
        .padding(.horizontal, -6)
        .accessibilityHidden(true)
    }
  }
}
```

```swift title="swift/Components/Separator.swift"
import SwiftUI

public struct Separator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .horizontal) {
    self.orientation = orientation
  }

  public var body: some View {
    Rectangle()
      .fill(Color.separator)
      .frame(width: orientation == .vertical ? 1 : nil, height: orientation == .horizontal ? 1 : nil)
      .frame(maxWidth: orientation == .horizontal ? .infinity : nil, maxHeight: orientation == .vertical ? .infinity : nil)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Switch.swift"
import SwiftUI

public struct SwitchStyle: ToggleStyle {
  public enum Size: CaseIterable, Sendable {
    case `default`, sm

    var track: CGSize {
      switch self {
      case .default: CGSize(width: 52, height: 24)
      case .sm: CGSize(width: 44, height: 20)
      }
    }

    var thumbHeight: CGFloat {
      switch self {
      case .default: 20
      case .sm: 16
      }
    }

    func thumbWidth(pressed: Bool) -> CGFloat {
      switch self {
      case .default: pressed ? 36 : 32
      case .sm: pressed ? 30 : 26
      }
    }

    func travel(pressed: Bool) -> CGFloat {
      switch self {
      case .default: pressed ? 12 : 16
      case .sm: pressed ? 10 : 14
      }
    }
  }

  let size: Size

  public init(size: Size = .default) {
    self.size = size
  }

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      HStack(spacing: 12) {
        SwitchTrack(isOn: configuration.isOn, pressed: pressed, size: size)
        SwitchLabel(label: configuration.label)
      }
      .contentShape(Rectangle().inset(by: -8))
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityElement(children: .combine)
    .accessibilityRemoveTraits(.isButton)
    .accessibilityAddTraits(.isToggle)
    .accessibilityValue(configuration.isOn ? Text("On") : Text("Off"))
  }
}

private struct SwitchLabel<Label: View>: View {
  let label: Label

  var body: some View {
    if #available(iOS 18, *) {
      SwitchLabelVisibility(label: label)
    } else {
      label
    }
  }
}

@available(iOS 18, *)
private struct SwitchLabelVisibility<Label: View>: View {
  let label: Label

  @Environment(\.labelsVisibility) private var visibility

  var body: some View {
    if visibility != .hidden {
      label
    }
  }
}

private struct SwitchTrack: View {
  let isOn: Bool
  let pressed: Bool
  let size: SwitchStyle.Size

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  var body: some View {
    let squeezed = pressed && isEnabled
    ZStack(alignment: .leading) {
      Capsule().fill(fill)
      Capsule().strokeBorder(border, lineWidth: 2)
      Capsule()
        .fill(colorScheme == .dark ? Color.label : .surface)
        .frame(width: size.thumbWidth(pressed: squeezed), height: size.thumbHeight)
        .shadow(.thumb)
        .offset(x: 2 + (isOn ? size.travel(pressed: squeezed) : 0))
    }
    .frame(width: size.track.width, height: size.track.height)
    .animation(reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.2), value: isOn)
    .animation(reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.2), value: squeezed)
  }

  private var fill: Color {
    if isOn { return isEnabled ? .accent : .accentDisabled }
    return isEnabled ? .labelQuaternary : .controlDisabled
  }

  private var border: Color {
    if invalid && isEnabled { return .danger }
    return isOn && isEnabled ? .accent : .clear
  }
}

extension ToggleStyle where Self == SwitchStyle {
  public static func `switch`(size: SwitchStyle.Size) -> SwitchStyle {
    SwitchStyle(size: size)
  }
}
```

```swift title="swift/Components/TabBar.swift"
import SwiftUI

public enum TabBarBadge: Equatable, Sendable, ExpressibleByIntegerLiteral, ExpressibleByStringLiteral {
  case dot
  case count(Int)
  case text(String)

  public init(integerLiteral value: Int) {
    self = .count(value)
  }

  public init(stringLiteral value: String) {
    self = .text(value)
  }

  var label: String? {
    switch self {
    case .dot: nil
    case .count(let value): value > 99 ? "99+" : "\(value)"
    case .text(let value): value
    }
  }

  var isVisible: Bool {
    switch self {
    case .dot: true
    case .count(let value): value > 0
    case .text(let value): !value.isEmpty
    }
  }
}

struct TabBarContext: @unchecked Sendable {
  var selected: AnyHashable?
  var namespace: Namespace.ID?
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

extension EnvironmentValues {
  @Entry var tabBar = TabBarContext()
}

public struct TabBar<Content: View>: View {
  let selection: Binding<AnyHashable>
  let content: Content

  @Namespace private var namespace
  @State private var bottomInset: CGFloat = 0
  @Environment(\.colorScheme) private var colorScheme
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init<Value: Hashable & Sendable>(
    selection: Binding<Value>,
    @ViewBuilder content: () -> Content
  ) {
    self.selection = Binding(
      get: { AnyHashable(selection.wrappedValue) },
      set: { value in
        if let value = value.base as? Value {
          selection.wrappedValue = value
        }
      }
    )
    self.content = content()
  }

  public var body: some View {
    let binding = selection
    let context = TabBarContext(selected: binding.wrappedValue, namespace: namespace) { value in
      if binding.wrappedValue != value { binding.wrappedValue = value }
    }
    HStack(alignment: .top, spacing: 0) {
      content
    }
    .padding(4)
    .background {
      Capsule()
        .fill(Color.surfaceRaised)
        .shadow(.lg)
    }
    .overlay {
      Capsule().strokeBorder(Color.label.opacity(colorScheme == .dark ? 0.1 : 0.05))
    }
    .animation(reduceMotion ? nil : .spring(duration: 0.3, bounce: 0.15), value: binding.wrappedValue)
    .padding(.horizontal, 16)
    .padding(.top, 8)
    .padding(.bottom, max(12, bottomInset - 8))
    .frame(maxWidth: .infinity)
    .ignoresSafeArea(.container, edges: .bottom)
    .background {
      Color.clear
        .onGeometryChange(for: CGFloat.self) { $0.safeAreaInsets.bottom.rounded() } action: { bottomInset = $0 }
    }
    .environment(\.tabBar, context)
    .hapticFeedback(.selection, trigger: binding.wrappedValue)
    .accessibilityElement(children: .contain)
    .accessibilityAddTraits(.isTabBar)
  }
}

public struct TabBarItem: View {
  let value: AnyHashable
  let title: Text
  let icon: Image
  let activeIcon: Image?
  let badge: TabBarBadge?

  @Environment(\.tabBar) private var tabBar
  @Environment(\.isEnabled) private var isEnabled

  public init<Value: Hashable & Sendable>(
    _ title: LocalizedStringKey,
    value: Value,
    icon: Image,
    activeIcon: Image? = nil,
    badge: TabBarBadge? = nil
  ) {
    self.value = AnyHashable(value)
    self.title = Text(title)
    self.icon = icon
    self.activeIcon = activeIcon
    self.badge = badge
  }

  public init<Value: Hashable & Sendable>(
    verbatim title: String,
    value: Value,
    icon: Image,
    activeIcon: Image? = nil,
    badge: TabBarBadge? = nil
  ) {
    self.value = AnyHashable(value)
    self.title = Text(verbatim: title)
    self.icon = icon
    self.activeIcon = activeIcon
    self.badge = badge
  }

  public var body: some View {
    let active = tabBar.selected == value
    Button {
      tabBar.select(value)
    } label: {
      VStack(spacing: 2) {
        (active ? activeIcon ?? icon : icon)
          .resizable()
          .scaledToFit()
          .frame(width: 24, height: 24)
          .overlay(alignment: .topLeading) {
            if let badge, badge.isVisible {
              TabBarBadgeView(badge: badge)
                .offset(x: badge.label == nil ? 16 : 14, y: badge.label == nil ? -1 : -6)
            }
          }
        title
          .scaledFont(.xs3, weight: .medium)
          .lineLimit(1)
      }
      .foregroundStyle(!isEnabled ? Color.labelQuaternary : active ? .accent : .labelSecondary)
      .padding(.vertical, 6)
      .frame(maxWidth: .infinity)
      .contentShape(Capsule())
    }
    .buttonStyle(TabBarItemStyle())
    .background {
      if active, let namespace = tabBar.namespace {
        Capsule()
          .fill(Color.control)
          .matchedGeometryEffect(id: "active", in: namespace)
      }
    }
    .accessibilityElement(children: .ignore)
    .accessibilityLabel(title)
    .accessibilityValue(badgeValue)
    .accessibilityAddTraits(active ? [.isSelected, .isButton] : .isButton)
  }

  private var badgeValue: Text {
    guard let badge, badge.isVisible else { return Text(verbatim: "") }
    switch badge {
    case .dot: return Text("New")
    case .count(let value): return Text("\(value) new")
    case .text(let value): return Text(verbatim: value)
    }
  }
}

private struct TabBarItemStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .background(configuration.isPressed ? Color.itemPressed : .clear, in: Capsule())
  }
}

private struct TabBarBadgeView: View {
  let badge: TabBarBadge

  var body: some View {
    Group {
      if let label = badge.label {
        Text(verbatim: label)
          .font(TextStyle.xs3.font(weight: .semibold))
          .monospacedDigit()
          .foregroundStyle(Color.onAccent)
          .padding(.horizontal, 5)
          .frame(minWidth: 18, minHeight: 18)
          .background(Color.danger, in: Capsule())
      } else {
        Circle()
          .fill(Color.danger)
          .frame(width: 10, height: 10)
      }
    }
    .background(Capsule().fill(Color.surfaceRaised).padding(-2))
    .fixedSize()
    .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Tabs.swift"
import SwiftUI

public struct Tabs<Content: View>: View {
  let selection: Binding<AnyHashable>
  let orientation: Axis
  let content: Content

  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init<Value: Hashable & Sendable>(
    selection: Binding<Value>,
    orientation: Axis = .horizontal,
    @ViewBuilder content: () -> Content
  ) {
    self.selection = Binding(
      get: { AnyHashable(selection.wrappedValue) },
      set: { value in
        if let value = value.base as? Value {
          selection.wrappedValue = value
        }
      }
    )
    self.orientation = orientation
    self.content = content()
  }

  public var body: some View {
    let binding = selection
    let animation: Animation? = reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.3)
    let context = TabsContext(
      selected: binding.wrappedValue,
      orientation: orientation,
      select: { value in
        withAnimation(animation) { binding.wrappedValue = value }
      }
    )
    Group {
      if orientation == .vertical {
        HStack(alignment: .top, spacing: 8) { content }
      } else {
        VStack(alignment: .leading, spacing: 8) { content }
      }
    }
    .environment(\.tabs, context)
  }
}

struct TabsContext: @unchecked Sendable {
  var selected: AnyHashable?
  var orientation: Axis = .horizontal
  var select: @MainActor @Sendable (AnyHashable) -> Void = { _ in }
}

extension EnvironmentValues {
  @Entry var tabs = TabsContext()
  @Entry var tabsListVariant: TabsListVariant = .default
  @Entry var tabsIndicator: Namespace.ID? = nil
}

public enum TabsListVariant: CaseIterable, Sendable {
  case `default`, line
}

public struct TabsList<Content: View>: View {
  public typealias Variant = TabsListVariant

  let variant: Variant
  let content: Content

  @Namespace private var namespace
  @Environment(\.tabs) private var tabs

  public init(variant: Variant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    let vertical = tabs.orientation == .vertical
    Group {
      if vertical {
        VStack(alignment: .leading, spacing: 4) { content }
          .fixedSize(horizontal: true, vertical: false)
      } else {
        HStack(spacing: 4) { content }
          .frame(height: variant == .line ? 32 : 36)
      }
    }
    .padding(variant == .line ? 2 : 4)
    .padding(variant == .line && !vertical ? .bottom : [], 5)
    .padding(variant == .line && vertical ? .trailing : [], 5)
    .background {
      if variant == .default {
        RoundedRectangle(cornerRadius: Radius.xl, style: .continuous).fill(Color.control)
      }
    }
    .environment(\.tabsListVariant, variant)
    .environment(\.tabsIndicator, namespace)
    .accessibilityElement(children: .contain)
  }
}

public struct TabsTrigger<Label: View>: View {
  let value: AnyHashable
  let label: Label

  @Environment(\.tabs) private var tabs
  @Environment(\.tabsListVariant) private var variant
  @Environment(\.tabsIndicator) private var namespace
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.colorScheme) private var colorScheme

  public init<Value: Hashable & Sendable>(value: Value, @ViewBuilder label: () -> Label) {
    self.value = AnyHashable(value)
    self.label = label()
  }

  public var body: some View {
    let active = tabs.selected == value
    let vertical = tabs.orientation == .vertical
    Button {
      tabs.select(value)
    } label: {
      label
        .labelStyle(ButtonLabelStyle(spacing: 8, iconSize: 16))
        .font(TextStyle.sm.font())
        .tracking(TextStyle.sm.letterSpacing)
        .lineLimit(1)
        .foregroundStyle(!isEnabled ? Color.labelQuaternary : active ? .label : .labelSecondary)
        .padding(.horizontal, 12)
        .padding(.vertical, 4)
        .frame(maxWidth: vertical ? .infinity : nil, alignment: vertical ? .leading : .center)
        .frame(height: vertical ? 36 : nil)
        .frame(maxHeight: vertical ? nil : .infinity)
        .contentShape(Rectangle())
    }
    .buttonStyle(TabsTriggerStyle())
    .background(alignment: vertical ? .trailing : .bottom) {
      if active, let namespace {
        indicator
          .matchedGeometryEffect(id: "indicator", in: namespace)
      }
    }
    .accessibilityAddTraits(active ? .isSelected : [])
  }

  @ViewBuilder private var indicator: some View {
    let vertical = tabs.orientation == .vertical
    if variant == .line {
      Rectangle()
        .fill(Color.label)
        .frame(width: vertical ? 2 : nil, height: vertical ? nil : 2)
        .offset(x: vertical ? 4 : 0, y: vertical ? 0 : 5)
    } else {
      RoundedRectangle(cornerRadius: Radius.md, style: .continuous)
        .fill(colorScheme == .dark ? Color.labelQuaternary : .surfaceRaised)
        .shadow(color: .black.opacity(colorScheme == .dark ? 0 : 0.08), radius: 1.5, y: 1)
    }
  }
}

extension TabsTrigger where Label == Text {
  public init<Value: Hashable & Sendable>(_ title: LocalizedStringKey, value: Value) {
    self.init(value: value) { Text(title) }
  }
}

private struct TabsTriggerStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label
      .opacity(configuration.isPressed ? 0.7 : 1)
  }
}

public struct TabsContent<Content: View>: View {
  let value: AnyHashable
  let content: Content

  @Environment(\.tabs) private var tabs

  public init<Value: Hashable & Sendable>(value: Value, @ViewBuilder content: () -> Content) {
    self.value = AnyHashable(value)
    self.content = content()
  }

  public var body: some View {
    if tabs.selected == value {
      content
        .frame(maxWidth: .infinity, alignment: .topLeading)
    }
  }
}
```

```swift title="swift/Components/TextVariant.swift"
import SwiftUI

public enum TextVariant: CaseIterable, Sendable {
  case `default`, h1, h2, h3, h4, p, blockquote, code, lead, large, small, muted

  var style: TextStyle {
    switch self {
    case .h1: .xl3
    case .h2: .xl2
    case .h3: .xl
    case .h4, .lead, .large: .lg
    case .code, .small, .muted: .sm
    default: .base
    }
  }

  var weight: Font.Weight {
    switch self {
    case .h1, .h2: .bold
    case .h3, .h4, .large, .code: .semibold
    case .small: .medium
    default: .regular
    }
  }

  var color: Color {
    switch self {
    case .lead, .muted: .labelSecondary
    default: .label
    }
  }

  var isHeading: Bool {
    switch self {
    case .h1, .h2, .h3, .h4: true
    default: false
    }
  }
}

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

  func body(content: Content) -> some View {
    switch variant {
    case .blockquote:
      styled(content)
        .italic()
        .padding(.leading, 12)
        .overlay(alignment: .leading) {
          Rectangle().fill(Color.separator).frame(width: 2)
        }
        .padding(.top, 16)
    case .code:
      styled(content)
        .monospaced()
        .padding(.horizontal, 4)
        .padding(.vertical, 2)
        .background(Color.surfaceSecondary, in: RoundedRectangle(cornerRadius: Radius.sm, style: .continuous))
    case .p:
      styled(content).padding(.top, 12)
    default:
      styled(content)
    }
  }

  private func styled(_ content: Content) -> some View {
    content
      .scaledTextStyle(variant.style, weight: variant.weight)
      .foregroundStyle(variant.color)
      .accessibilityAddTraits(variant.isHeading ? .isHeader : [])
  }
}

extension View {
  public func textVariant(_ variant: TextVariant) -> some View {
    modifier(TextVariantModifier(variant: variant))
  }
}

private struct ScaledTextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    let size = style.size * scale
    let lineSpacing = max(0, style.lineHeight * scale - UIFont.systemFont(ofSize: size).lineHeight)
    content
      .font(.system(size: size, weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(lineSpacing)
      .padding(.vertical, lineSpacing / 2)
  }
}

extension View {
  func scaledTextStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledTextStyleModifier(style: style, weight: weight))
  }

  func scaledFont(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledFontModifier(style: style, weight: weight))
  }
}

private struct ScaledFontModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    content
      .font(.system(size: style.size * scale, weight: weight))
      .tracking(style.letterSpacing)
  }
}
```

```swift title="swift/Components/Toggle.swift"
import SwiftUI

public enum ToggleVariant: CaseIterable, Sendable {
  case `default`, outline
}

public enum ToggleSize: CaseIterable, Sendable {
  case `default`, sm, lg

  var height: CGFloat {
    switch self {
    case .default: 36
    case .sm: 32
    case .lg: 40
    }
  }

  var horizontalPadding: CGFloat {
    self == .lg ? 16 : 12
  }
}

public struct VariantToggleStyle: ToggleStyle {
  let variant: ToggleVariant
  let size: ToggleSize

  public init(_ variant: ToggleVariant = .default, size: ToggleSize = .default) {
    self.variant = variant
    self.size = size
  }

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      ToggleSurface(isOn: configuration.isOn, pressed: pressed, variant: variant, size: size) {
        configuration.label
      }
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityAddTraits(configuration.isOn ? .isSelected : [])
  }
}

extension ToggleStyle where Self == VariantToggleStyle {
  public static func variant(_ variant: ToggleVariant = .default, size: ToggleSize = .default) -> VariantToggleStyle {
    VariantToggleStyle(variant, size: size)
  }
}

struct ToggleSurface<Content: View>: View {
  let isOn: Bool
  let pressed: Bool
  let variant: ToggleVariant
  let size: ToggleSize
  var shape = AnyShape(RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
  var bordered = true
  let content: Content

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  init(
    isOn: Bool,
    pressed: Bool,
    variant: ToggleVariant,
    size: ToggleSize,
    shape: AnyShape? = nil,
    bordered: Bool = true,
    @ViewBuilder content: () -> Content
  ) {
    self.isOn = isOn
    self.pressed = pressed
    self.variant = variant
    self.size = size
    if let shape { self.shape = shape }
    self.bordered = bordered
    self.content = content()
  }

  var body: some View {
    content
      .labelStyle(ButtonLabelStyle(spacing: 4, iconSize: 16))
      .scaledFont(.sm)
      .lineLimit(1)
      .foregroundStyle(foreground)
      .padding(.horizontal, size.horizontalPadding)
      .frame(minWidth: size.height, minHeight: size.height)
      .background(background, in: shape)
      .overlay {
        if variant == .outline && bordered {
          shape.stroke(Color.separator, lineWidth: 1).padding(0.5)
        }
      }
      .contentShape(shape)
      .scaleEffect(pressed && isEnabled && !reduceMotion ? 0.96 : 1)
      .animation(reduceMotion ? nil : .easeOut(duration: 0.15), value: pressed)
  }

  private var foreground: Color {
    if !isEnabled { return .labelQuaternary }
    return isOn ? .link : .label
  }

  private var background: Color {
    if !isEnabled { return isOn ? .controlDisabled : .clear }
    if isOn { return pressed ? .itemPressed : .itemSelected }
    return pressed ? .itemPressed : .clear
  }
}
```

```swift title="swift/Components/ToggleGroup.swift"
import SwiftUI

struct ToggleGroupContext {
  var variant: ToggleVariant
  var size: ToggleSize
  var spacing: Int
  var orientation: Axis
  var namespace: Namespace.ID
  var multiple: Bool
  var isSelected: (AnyHashable) -> Bool
  var toggle: (AnyHashable) -> Void

  var segmented: Bool { spacing == 0 && variant == .default }
  var attached: Bool { spacing == 0 && variant == .outline }
}

extension EnvironmentValues {
  @Entry var toggleGroup: ToggleGroupContext?
}

public struct ToggleGroup<Value: Hashable, Content: View>: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis
  let multiple: Bool
  let isSelected: (Value) -> Bool
  let toggle: (Value) -> Void
  let content: Content

  @Namespace private var namespace
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    selection: Binding<Value?>,
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal,
    @ViewBuilder content: () -> Content
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    multiple = false
    isSelected = { selection.wrappedValue == $0 }
    toggle = { value in
      selection.wrappedValue = selection.wrappedValue == value ? nil : value
    }
    self.content = content()
  }

  public init(
    selection: Binding<Set<Value>>,
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal,
    @ViewBuilder content: () -> Content
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    multiple = true
    isSelected = { selection.wrappedValue.contains($0) }
    toggle = { value in
      if selection.wrappedValue.contains(value) {
        selection.wrappedValue.remove(value)
      } else {
        selection.wrappedValue.insert(value)
      }
    }
    self.content = content()
  }

  public var body: some View {
    let context = ToggleGroupContext(
      variant: variant,
      size: size,
      spacing: spacing,
      orientation: orientation,
      namespace: namespace,
      multiple: multiple,
      isSelected: { value in (value.base as? Value).map(isSelected) ?? false },
      toggle: { value in
        guard let value = value.base as? Value else { return }
        if reduceMotion {
          toggle(value)
        } else {
          withAnimation(.timingCurve(0.32, 0.72, 0, 1, duration: 0.3)) { toggle(value) }
        }
      }
    )
    container
      .environment(\.toggleGroup, context)
      .accessibilityElement(children: .contain)
  }

  private var segmented: Bool { spacing == 0 && variant == .default }

  private var attached: Bool { spacing == 0 && variant == .outline }

  private var gap: CGFloat {
    segmented ? 4 : CGFloat(spacing) * 4
  }

  @ViewBuilder private var stack: some View {
    switch orientation {
    case .horizontal:
      HStack(spacing: gap) { content }
    case .vertical:
      VStack(alignment: .leading, spacing: gap) { content }
    }
  }

  @ViewBuilder private var container: some View {
    if segmented {
      let shape = RoundedRectangle(cornerRadius: Radius.xl, style: .continuous)
      stack
        .padding(4)
        .background(Color.control, in: shape)
    } else if attached {
      let shape = RoundedRectangle(cornerRadius: orientation == .vertical ? Radius.xl : Radius.lg, style: .continuous)
      stack
        .padding(1)
        .clipShape(shape)
        .overlay {
          shape.stroke(Color.separator, lineWidth: 1).padding(0.5)
        }
    } else {
      stack
    }
  }
}

public struct ToggleGroupItem<Value: Hashable, Label: View>: View {
  let value: Value
  let label: Label

  @Environment(\.toggleGroup) private var group
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.colorScheme) private var colorScheme

  public init(value: Value, @ViewBuilder label: () -> Label) {
    self.value = value
    self.label = label()
  }

  public var body: some View {
    let isOn = group?.isSelected(AnyHashable(value)) ?? false
    HapticButton(style: PressReader { pressed in
      item(isOn: isOn, pressed: pressed)
    }) {
      guard let group else { return false }
      group.toggle(AnyHashable(value))
      return true
    }
    .accessibilityAddTraits(isOn ? .isSelected : [])
  }

  @ViewBuilder private func item(isOn: Bool, pressed: Bool) -> some View {
    let variant = group?.variant ?? .default
    let size = group?.size ?? .default
    if let group, group.segmented {
      let shape = RoundedRectangle(cornerRadius: Radius.md, style: .continuous)
      label
        .labelStyle(ButtonLabelStyle(spacing: 4, iconSize: 16))
        .scaledFont(.sm)
        .lineLimit(1)
        .foregroundStyle(!isEnabled ? Color.labelQuaternary : isOn ? .label : .labelSecondary)
        .padding(.horizontal, 12)
        .frame(minWidth: size.height, minHeight: size.height)
        .frame(maxWidth: group.orientation == .vertical ? .infinity : nil)
        .background {
          if isOn {
            if isEnabled {
              shape
                .fill(colorScheme == .dark ? Color.labelQuaternary : .surfaceRaised)
                .shadow(.thumb)
                .matchedGeometryEffect(id: group.multiple ? AnyHashable(value) : AnyHashable("indicator"), in: group.namespace)
            } else {
              shape.fill(Color.controlDisabled)
            }
          }
        }
        .contentShape(shape)
    } else if let group, group.attached {
      ToggleSurface(
        isOn: isOn,
        pressed: pressed,
        variant: variant,
        size: size,
        shape: AnyShape(Rectangle()),
        bordered: false
      ) {
        label
      }
      .frame(maxWidth: group.orientation == .vertical ? .infinity : nil)
      .overlay(alignment: group.orientation == .vertical ? .top : .leading) {
        if group.orientation == .vertical {
          Color.separator.frame(height: 1).offset(y: -1)
        } else {
          Color.separator.frame(width: 1).offset(x: -1)
        }
      }
    } else {
      ToggleSurface(isOn: isOn, pressed: pressed, variant: variant, size: size) {
        label
      }
      .frame(maxWidth: group?.orientation == .vertical ? .infinity : nil)
    }
  }
}

extension ToggleGroupItem where Label == Text {
  public init(_ title: LocalizedStringKey, value: Value) {
    self.init(value: value) { Text(title) }
  }
}
```

```swift title="swift/Patterns/Adaptive.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry var patternCompact: Bool? = nil
}

@propertyWrapper
struct CompactLayout: DynamicProperty {
  @Environment(\.patternCompact) private var forced
  @Environment(\.horizontalSizeClass) private var sizeClass

  init() {}

  var wrappedValue: Bool {
    forced ?? (sizeClass != .regular)
  }
}

extension Binding where Value == Bool {
  func gated(_ enabled: Bool) -> Binding<Bool> {
    Binding(
      get: { enabled && wrappedValue },
      set: { wrappedValue = $0 }
    )
  }
}
```

```swift title="swift/Patterns/OptionPicker.swift"
import PhosphorSwift
import SwiftUI

extension EnvironmentValues {
  @Entry var optionPickerNative = false
}

public struct OptionPicker<Value: Hashable & Sendable, Content: View>: View {
  public typealias Size = SelectSize

  let selection: Binding<Value?>
  let placeholder: LocalizedStringKey
  let size: Size
  let content: () -> Content

  @State private var labels: [AnyHashable: Text] = [:]
  @CompactLayout private var compact
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  public init(
    selection: Binding<Value?>,
    placeholder: LocalizedStringKey = "Select",
    size: Size = .default,
    @ViewBuilder content: @escaping () -> Content
  ) {
    self.selection = selection
    self.placeholder = placeholder
    self.size = size
    self.content = content
  }

  public var body: some View {
    if compact {
      native
    } else {
      SelectField(selection: selection, placeholder: placeholder, size: size, content: content)
    }
  }

  private var native: some View {
    let binding = selection
    let erased = Binding<AnyHashable?>(
      get: { binding.wrappedValue.map { AnyHashable($0) } },
      set: { value in binding.wrappedValue = value?.base as? Value }
    )
    let valueText = binding.wrappedValue.flatMap { labels[AnyHashable($0)] }
    let shape = RoundedRectangle(cornerRadius: size == .sm ? Radius.md : Radius.lg, style: .continuous)
    return Menu {
      Picker(selection: erased) {
        content().environment(\.optionPickerNative, true)
      } label: {
        Text(placeholder)
      }
      .pickerStyle(.inline)
    } label: {
      HStack(spacing: 6) {
        (valueText ?? Text(placeholder))
          .scaledFont(.base)
          .lineLimit(1)
          .foregroundStyle(!isEnabled ? Color.labelQuaternary : valueText == nil ? .labelSecondary : .label)
          .frame(maxWidth: .infinity, alignment: .leading)
        Ph.caretUpDown.regular
          .frame(width: 16, height: 16)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityHidden(true)
      }
      .padding(.horizontal, 12)
      .frame(minHeight: size == .sm ? 36 : 44)
      .background(background, in: shape)
      .overlay {
        if invalid {
          shape.strokeBorder(Color.danger)
        }
      }
      .contentShape(shape)
    }
    .tint(Color.label)
    .accessibilityLabel(valueText ?? Text(placeholder))
    .accessibilityHint(Text("Shows options"))
    .background {
      VStack(spacing: 0) { content() }
        .environment(\.select, SelectContext(registering: true))
        .hidden()
        .frame(width: 0, height: 0)
        .clipped()
        .accessibilityHidden(true)
        .allowsHitTesting(false)
    }
    .onPreferenceChange(SelectLabelsKey.self) { value in
      labels = value
    }
  }

  private var background: Color {
    if !isEnabled { return .controlDisabled }
    if invalid { return .danger.opacity(colorScheme == .dark ? 0.1 : 0.05) }
    return .control
  }
}

public struct OptionPickerItem: View {
  let tag: AnyHashable
  let title: Text
  let item: SelectItem

  @Environment(\.optionPickerNative) private var native

  public init<Value: Hashable & Sendable>(_ title: LocalizedStringKey, value: Value) {
    tag = AnyHashable(value)
    self.title = Text(title)
    item = SelectItem(title, value: value)
  }

  public init<Value: Hashable & Sendable>(verbatim title: String, value: Value) {
    tag = AnyHashable(value)
    self.title = Text(verbatim: title)
    item = SelectItem(verbatim: title, value: value)
  }

  public var body: some View {
    if native {
      title.tag(Optional(tag))
    } else {
      item
    }
  }
}

public struct OptionPickerGroup<Content: View>: View {
  let label: LocalizedStringKey?
  let content: Content

  @Environment(\.optionPickerNative) private var native

  public init(_ label: LocalizedStringKey? = nil, @ViewBuilder content: () -> Content) {
    self.label = label
    self.content = content()
  }

  public var body: some View {
    if native {
      if let label {
        Section(label) { content }
      } else {
        Section { content }
      }
    } else {
      SelectGroup {
        if let label {
          SelectLabel(label)
        }
        content
      }
    }
  }
}

public struct OptionPickerSeparator: View {
  @Environment(\.optionPickerNative) private var native

  public init() {}

  public var body: some View {
    if !native {
      SelectSeparator()
    }
  }
}
```

```swift title="swift/Patterns/SplitView.swift"
import PhosphorSwift
import SwiftUI

public enum SplitViewColumn: CaseIterable, Sendable {
  case sidebar, list, detail

  var next: SplitViewColumn {
    switch self {
    case .sidebar: .list
    case .list, .detail: .detail
    }
  }

  var previous: SplitViewColumn? {
    switch self {
    case .sidebar: nil
    case .list: .sidebar
    case .detail: .list
    }
  }

  var order: Int {
    switch self {
    case .sidebar: 0
    case .list: 1
    case .detail: 2
    }
  }

  var weight: CGFloat {
    switch self {
    case .sidebar: 20
    case .list: 32
    case .detail: 48
    }
  }
}

enum SplitViewMath {
  static let wideWidth: CGFloat = 768

  static func isWide(_ width: CGFloat) -> Bool {
    width >= wideWidth
  }

  static func backColumn(for kind: SplitViewColumn, present: [SplitViewColumn]) -> SplitViewColumn? {
    guard let previous = kind.previous else { return nil }
    return present.contains(previous) ? previous : nil
  }

  static func widths(total: CGFloat, present: [SplitViewColumn]) -> [SplitViewColumn: CGFloat] {
    let available = max(0, total - CGFloat(max(present.count - 1, 0)))
    let sum = present.reduce(0) { $0 + $1.weight }
    guard sum > 0 else { return [:] }
    var result: [SplitViewColumn: CGFloat] = [:]
    for column in present {
      result[column] = (available * column.weight / sum).rounded(.down)
    }
    return result
  }
}

struct SplitViewColumnKey: LayoutValueKey {
  static let defaultValue: SplitViewColumn? = nil
}

struct SplitViewColumnsLayout: Layout {
  func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
    let width = proposal.width ?? SplitViewMath.wideWidth
    if let height = proposal.height { return CGSize(width: width, height: height) }
    let widths = columnWidths(total: width, subviews: subviews)
    let height = zip(subviews, widths).map { $0.sizeThatFits(ProposedViewSize(width: $1, height: nil)).height }.max() ?? 0
    return CGSize(width: width, height: height)
  }

  func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) {
    let widths = columnWidths(total: bounds.width, subviews: subviews)
    var x = bounds.minX
    for (subview, width) in zip(subviews, widths) {
      subview.place(
        at: CGPoint(x: x, y: bounds.minY),
        anchor: .topLeading,
        proposal: ProposedViewSize(width: width, height: bounds.height)
      )
      x += width + 1
    }
  }

  private func columnWidths(total: CGFloat, subviews: Subviews) -> [CGFloat] {
    let kinds = subviews.map { $0[SplitViewColumnKey.self] ?? .detail }
    let widths = SplitViewMath.widths(total: total, present: kinds)
    var result = kinds.map { widths[$0] ?? 0 }
    if !result.isEmpty {
      let used = result.dropLast().reduce(0, +) + CGFloat(result.count - 1)
      result[result.count - 1] = max(0, total - used)
    }
    return result
  }
}

struct SplitViewPaneInfo: Equatable {
  let kind: SplitViewColumn
  let title: Text?
}

struct SplitViewPanesKey: PreferenceKey {
  static var defaultValue: [SplitViewPaneInfo] { [] }

  static func reduce(value: inout [SplitViewPaneInfo], nextValue: () -> [SplitViewPaneInfo]) {
    value.append(contentsOf: nextValue())
  }
}

struct SplitViewContext: @unchecked Sendable {
  var wide = false
  var column: SplitViewColumn = .list
  var panes: [SplitViewPaneInfo] = []
  var forward = true
  var select: @MainActor @Sendable (SplitViewColumn) -> Void = { _ in }

  func title(_ kind: SplitViewColumn) -> Text? {
    panes.first { $0.kind == kind }?.title
  }
}

extension EnvironmentValues {
  @Entry var splitView: SplitViewContext? = nil
  @Entry var splitViewColumn: SplitViewColumn = .list
}

public struct SplitView<Content: View>: View {
  let external: Binding<SplitViewColumn>?
  let content: Content

  @State private var local: SplitViewColumn
  @State private var width: CGFloat = 0
  @State private var panes: [SplitViewPaneInfo] = []
  @State private var forward = true
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(column: Binding<SplitViewColumn>, @ViewBuilder content: () -> Content) {
    self.external = column
    self._local = State(initialValue: column.wrappedValue)
    self.content = content()
  }

  public init(defaultColumn: SplitViewColumn = .list, @ViewBuilder content: () -> Content) {
    self.external = nil
    self._local = State(initialValue: defaultColumn)
    self.content = content()
  }

  public var body: some View {
    let binding = external ?? $local
    let current = binding.wrappedValue
    let wide = SplitViewMath.isWide(width)
    let animation: Animation? = reduceMotion ? nil : .timingCurve(0.32, 0.72, 0, 1, duration: 0.35)
    let context = SplitViewContext(
      wide: wide,
      column: current,
      panes: panes,
      forward: forward,
      select: { next in
        guard next != binding.wrappedValue else { return }
        forward = next.order > binding.wrappedValue.order
        if wide {
          binding.wrappedValue = next
        } else {
          withAnimation(animation) { binding.wrappedValue = next }
        }
      }
    )
    Group {
      if wide {
        SplitViewColumnsLayout { content }
      } else {
        ZStack(alignment: .topLeading) { content }
      }
    }
    .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
    .clipped()
    .environment(\.splitView, context)
    .onGeometryChange(for: CGFloat.self) { $0.size.width } action: { width = $0 }
    .onPreferenceChange(SplitViewPanesKey.self) { value in panes = value }
  }
}

struct SplitViewPane<Content: View>: View {
  let kind: SplitViewColumn
  let title: Text?
  let content: Content

  @Environment(\.splitView) private var splitView
  @Environment(\.layoutDirection) private var layoutDirection

  var body: some View {
    let context = splitView ?? SplitViewContext()
    Group {
      if context.wide {
        pane(context)
          .frame(maxHeight: .infinity, alignment: .top)
          .overlay(alignment: .leading) {
            if context.panes.first?.kind != kind {
              Color.separator.frame(width: 1).offset(x: -1)
            }
          }
          .layoutValue(key: SplitViewColumnKey.self, value: kind)
      } else if context.column == kind {
        pane(context)
          .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
          .transition(
            .asymmetric(
              insertion: .move(edge: context.forward ? .trailing : .leading),
              removal: .move(edge: context.forward ? .leading : .trailing)
            )
          )
      } else {
        Color.clear
          .frame(width: 0, height: 0)
          .accessibilityHidden(true)
      }
    }
    .preference(key: SplitViewPanesKey.self, value: [SplitViewPaneInfo(kind: kind, title: title)])
  }

  private func pane(_ context: SplitViewContext) -> some View {
    let back = context.wide ? nil : SplitViewMath.backColumn(for: kind, present: context.panes.map(\.kind))
    return ScrollView {
      VStack(alignment: .leading, spacing: 0) {
        if let back {
          Button {
            context.select(back)
          } label: {
            HStack(spacing: 2) {
              Ph.caretLeft.bold
                .frame(width: 18, height: 18)
                .flipsForRightToLeftLayoutDirection(true)
              if let title = context.title(back) {
                title.lineLimit(1)
              } else {
                Text("Back")
              }
            }
            .scaledFont(.base)
            .foregroundStyle(Color.link)
            .frame(minHeight: 44)
            .contentShape(Rectangle())
          }
          .buttonStyle(SplitViewBackStyle())
          .padding(.leading, -6)
        }
        if let title {
          heading(title, wide: context.wide)
        }
        VStack(alignment: .leading, spacing: 0) {
          content
        }
        .padding(.top, context.wide ? 0 : -1)
        .clipped()
        .environment(\.splitViewColumn, kind)
      }
      .padding(padding(wide: context.wide))
      .frame(maxWidth: .infinity, alignment: .leading)
    }
  }

  @ViewBuilder
  private func heading(_ title: Text, wide: Bool) -> some View {
    if !wide {
      title
        .scaledFont(.xl3, weight: .bold)
        .foregroundStyle(Color.label)
        .padding(.bottom, 8)
        .accessibilityAddTraits(.isHeader)
    } else {
      switch kind {
      case .sidebar:
        title
          .scaledFont(.xs, weight: .semibold)
          .foregroundStyle(Color.labelSecondary)
          .padding(.horizontal, 12)
          .padding(.top, 12)
          .padding(.bottom, 8)
          .accessibilityAddTraits(.isHeader)
      case .list:
        title
          .frame(width: 0, height: 0)
          .opacity(0)
          .accessibilityAddTraits(.isHeader)
      case .detail:
        title
          .scaledFont(.xl, weight: .semibold)
          .foregroundStyle(Color.label)
          .padding(.bottom, 4)
          .accessibilityAddTraits(.isHeader)
      }
    }
  }

  private func padding(wide: Bool) -> EdgeInsets {
    guard wide else { return EdgeInsets(top: 0, leading: 16, bottom: 16, trailing: 16) }
    switch kind {
    case .sidebar: return EdgeInsets(top: 4, leading: 12, bottom: 12, trailing: 12)
    case .list: return EdgeInsets(top: 12, leading: 12, bottom: 12, trailing: 12)
    case .detail: return EdgeInsets(top: 32, leading: 32, bottom: 32, trailing: 32)
    }
  }
}

private struct SplitViewBackStyle: ButtonStyle {
  func makeBody(configuration: Configuration) -> some View {
    configuration.label.opacity(configuration.isPressed ? 0.6 : 1)
  }
}

public struct SplitViewSidebar<Content: View>: View {
  let title: Text?
  let content: Content

  public init(_ title: LocalizedStringKey? = nil, @ViewBuilder content: () -> Content) {
    self.title = title.map { Text($0) }
    self.content = content()
  }

  public init(verbatim title: String, @ViewBuilder content: () -> Content) {
    self.title = Text(verbatim: title)
    self.content = content()
  }

  public var body: some View {
    SplitViewPane(kind: .sidebar, title: title, content: content)
  }
}

public struct SplitViewList<Content: View>: View {
  let title: Text?
  let content: Content

  public init(_ title: LocalizedStringKey? = nil, @ViewBuilder content: () -> Content) {
    self.title = title.map { Text($0) }
    self.content = content()
  }

  public init(verbatim title: String, @ViewBuilder content: () -> Content) {
    self.title = Text(verbatim: title)
    self.content = content()
  }

  public var body: some View {
    SplitViewPane(kind: .list, title: title, content: content)
  }
}

public struct SplitViewDetail<Content: View>: View {
  let title: Text?
  let content: Content

  public init(_ title: LocalizedStringKey? = nil, @ViewBuilder content: () -> Content) {
    self.title = title.map { Text($0) }
    self.content = content()
  }

  public init(verbatim title: String, @ViewBuilder content: () -> Content) {
    self.title = Text(verbatim: title)
    self.content = content()
  }

  public var body: some View {
    SplitViewPane(kind: .detail, title: title, content: content)
  }
}

public struct SplitViewItem<Label: View>: View {
  let isActive: Bool
  let action: (() -> Void)?
  let label: Label

  @Environment(\.splitView) private var splitView
  @Environment(\.splitViewColumn) private var kind

  public init(isActive: Bool = false, action: (() -> Void)? = nil, @ViewBuilder label: () -> Label) {
    self.isActive = isActive
    self.action = action
    self.label = label()
  }

  public var body: some View {
    let wide = splitView?.wide ?? false
    Button {
      action?()
      splitView?.select(kind.next)
    } label: {
      HStack(spacing: 12) {
        VStack(alignment: .leading, spacing: 2) {
          label
        }
        .scaledFont(.base)
        .frame(maxWidth: .infinity, alignment: .leading)
        if !wide && kind != .detail {
          Ph.caretRight.regular
            .frame(width: 16, height: 16)
            .foregroundStyle(Color.labelTertiary)
            .flipsForRightToLeftLayoutDirection(true)
            .accessibilityHidden(true)
        }
      }
    }
    .buttonStyle(SplitViewItemStyle(wide: wide, kind: kind, active: isActive))
    .accessibilityAddTraits(isActive ? .isSelected : [])
  }
}

private struct SplitViewItemStyle: ButtonStyle {
  let wide: Bool
  let kind: SplitViewColumn
  let active: Bool

  @Environment(\.isEnabled) private var isEnabled

  func makeBody(configuration: Configuration) -> some View {
    let pressed = configuration.isPressed && isEnabled
    if wide {
      let shape = RoundedRectangle(cornerRadius: kind == .list ? Radius.xl : Radius.lg, style: .continuous)
      configuration.label
        .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
        .padding(.horizontal, 12)
        .padding(.vertical, kind == .list ? 12 : 8)
        .frame(maxWidth: .infinity, alignment: .leading)
        .background(pressed ? Color.itemPressed : active ? .itemSelected : .clear, in: shape)
        .contentShape(shape)
    } else {
      configuration.label
        .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
        .padding(.vertical, 12)
        .frame(maxWidth: .infinity, minHeight: 44, alignment: .leading)
        .background(pressed ? Color.itemPressed : .clear)
        .overlay(alignment: .top) {
          Color.separator.frame(height: 1)
        }
        .contentShape(Rectangle())
    }
  }
}
```

5. Add the files to your app target.

**Jetpack Compose**

1. Set `minSdk` to 24 or higher and add the dependencies:

```kotlin title="build.gradle.kts"
implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")
implementation("com.adamglin:phosphor-icon-android:1.0.0")
```

2. Copy the theme files every view uses:

```kt title="kotlin/theme/Theme.kt"
package com.esuiss.ui.theme

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.dropShadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.shadow.Shadow as DropShadow
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.LineHeightStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.DpOffset
import androidx.compose.ui.unit.em
import androidx.compose.ui.unit.sp

internal fun textStyle(size: Double, lineHeight: Double, letterSpacing: Double) = TextStyle(
    fontSize = size.sp,
    lineHeight = lineHeight.sp,
    letterSpacing = letterSpacing.em,
    lineHeightStyle = LineHeightStyle(
        alignment = LineHeightStyle.Alignment.Center,
        trim = LineHeightStyle.Trim.None,
    ),
)

@Immutable
data class Shadow(
    val offsetX: Dp,
    val offsetY: Dp,
    val blur: Dp,
    val color: Color,
)

fun Modifier.shadow(shadow: Shadow, shape: Shape): Modifier = dropShadow(
    shape,
    DropShadow(
        radius = shadow.blur,
        color = shadow.color,
        offset = DpOffset(shadow.offsetX, shadow.offsetY),
    ),
)

val LocalColors = staticCompositionLocalOf { LightColors }

object EsuissTheme {
    val colors: Colors
        @Composable get() = LocalColors.current

    val typography: Typography
        get() = Typography

    val radius: Radius
        get() = Radius

    val shadows: Shadows
        get() = Shadows
}

@Composable
fun EsuissTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    content: @Composable () -> Unit,
) {
    CompositionLocalProvider(
        LocalColors provides if (darkTheme) DarkColors else LightColors,
        content = content,
    )
}
```

```kt title="kotlin/theme/Tokens.kt"
package com.esuiss.ui.theme

import androidx.compose.runtime.Immutable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Immutable
data class Colors(
    val surface: Color,
    val surfaceSecondary: Color,
    val surfaceTertiary: Color,
    val surfaceRaised: Color,
    val label: Color,
    val labelSecondary: Color,
    val labelTertiary: Color,
    val labelQuaternary: Color,
    val control: Color,
    val controlPressed: Color,
    val controlSelected: Color,
    val controlDisabled: Color,
    val onControlSelected: Color,
    val itemPressed: Color,
    val itemSelected: Color,
    val separator: Color,
    val separatorStrong: Color,
    val accent: Color,
    val accentPressed: Color,
    val accentSelected: Color,
    val accentDisabled: Color,
    val onAccent: Color,
    val accentSurface: Color,
    val accentSurfacePressed: Color,
    val link: Color,
    val focus: Color,
    val scrim: Color,
    val media: Color,
    val onMedia: Color,
    val danger: Color,
    val dangerSurface: Color,
    val dangerSurfacePressed: Color,
    val success: Color,
    val successSurface: Color,
    val warning: Color,
    val warningSurface: Color,
    val blue: Color,
    val green: Color,
    val orange: Color,
    val red: Color,
    val yellow: Color,
    val purple: Color,
    val pink: Color,
    val indigo: Color,
    val teal: Color,
    val mint: Color,
    val cyan: Color,
    val brown: Color,
    val gray: Color,
    val isDark: Boolean,
)

val LightColors = Colors(
    surface = Color(0xFFFFFFFF),
    surfaceSecondary = Color(0xFFF5F5F7),
    surfaceTertiary = Color(0xFFE8E8ED),
    surfaceRaised = Color(0xFFFFFFFF),
    label = Color(0xFF1D1D1F),
    labelSecondary = Color(0xFF6E6E73),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFFD2D2D7),
    control = Color(0xFF000000).copy(alpha = 0.04f),
    controlPressed = Color(0xFF000000).copy(alpha = 0.12f),
    controlSelected = Color(0xFF1D1D1F),
    controlDisabled = Color(0xFF000000).copy(alpha = 0.03f),
    onControlSelected = Color(0xFFFFFFFF),
    itemPressed = Color(0xFF000000).copy(alpha = 0.08f),
    itemSelected = Color(0xFF000000).copy(alpha = 0.06f),
    separator = Color(0xFFD2D2D7),
    separatorStrong = Color(0xFF86868B),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF005BB8),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.09f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.18f),
    link = Color(0xFF0066CC),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFD0000A),
    dangerSurface = Color(0xFFD70015).copy(alpha = 0.08f),
    dangerSurfacePressed = Color(0xFFD70015).copy(alpha = 0.16f),
    success = Color(0xFF008009),
    successSurface = Color(0xFFEFFAF1),
    warning = Color(0xFFB64400),
    warningSurface = Color(0xFFFFF5EA),
    blue = Color(0xFF007AFF),
    green = Color(0xFF34C759),
    orange = Color(0xFFFF9500),
    red = Color(0xFFFF3B30),
    yellow = Color(0xFFFFCC00),
    purple = Color(0xFFAF52DE),
    pink = Color(0xFFFF2D55),
    indigo = Color(0xFF5856D6),
    teal = Color(0xFF30B0C7),
    mint = Color(0xFF00C7BE),
    cyan = Color(0xFF32ADE6),
    brown = Color(0xFFA2845E),
    gray = Color(0xFF8E8E93),
    isDark = false,
)

val DarkColors = Colors(
    surface = Color(0xFF000000),
    surfaceSecondary = Color(0xFF161617),
    surfaceTertiary = Color(0xFF2C2C2E),
    surfaceRaised = Color(0xFF1D1D1F),
    label = Color(0xFFF5F5F7),
    labelSecondary = Color(0xFFA1A1A6),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFF424245),
    control = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    controlPressed = Color(0xFFFFFFFF).copy(alpha = 0.22f),
    controlSelected = Color(0xFFF5F5F7),
    controlDisabled = Color(0xFFFFFFFF).copy(alpha = 0.05f),
    onControlSelected = Color(0xFF000000),
    itemPressed = Color(0xFFFFFFFF).copy(alpha = 0.12f),
    itemSelected = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    separator = Color(0xFF424245),
    separatorStrong = Color(0xFF6E6E73),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF004D9E),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.18f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.3f),
    link = Color(0xFF2997FF),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFFF5447),
    dangerSurface = Color(0xFFFF453A).copy(alpha = 0.2f),
    dangerSurfacePressed = Color(0xFFFF453A).copy(alpha = 0.36f),
    success = Color(0xFF30D158),
    successSurface = Color(0xFF30D158).copy(alpha = 0.16f),
    warning = Color(0xFFFF9F0A),
    warningSurface = Color(0xFFFF9F0A).copy(alpha = 0.16f),
    blue = Color(0xFF0A84FF),
    green = Color(0xFF30D158),
    orange = Color(0xFFFF9F0A),
    red = Color(0xFFFF453A),
    yellow = Color(0xFFFFD60A),
    purple = Color(0xFFBF5AF2),
    pink = Color(0xFFFF375F),
    indigo = Color(0xFF5E5CE6),
    teal = Color(0xFF40C8E0),
    mint = Color(0xFF66D4CF),
    cyan = Color(0xFF64D2FF),
    brown = Color(0xFFAC8E68),
    gray = Color(0xFF8E8E93),
    isDark = true,
)

object Radius {
    val xs = 3.dp
    val sm = 5.dp
    val md = 8.dp
    val lg = 10.dp
    val xl = 12.dp
    val xl2 = 18.dp
    val xl3 = 28.dp
    val full = 9999.dp
}

object Typography {
    val xs3 = textStyle(11.0, 13.0, 0.006)
    val xs2 = textStyle(12.0, 16.0, 0.0)
    val xs = textStyle(13.0, 18.0, -0.006)
    val sm = textStyle(15.0, 20.0, -0.016)
    val md = textStyle(16.0, 21.0, -0.02)
    val base = textStyle(17.0, 22.0, -0.026)
    val lg = textStyle(20.0, 25.0, -0.023)
    val xl = textStyle(22.0, 28.0, -0.012)
    val xl2 = textStyle(28.0, 34.0, 0.014)
    val xl3 = textStyle(34.0, 41.0, 0.012)

    val all = listOf(xs3, xs2, xs, sm, md, base, lg, xl, xl2, xl3)
}

object Shadows {
    val md = Shadow(2.dp, 4.dp, 12.dp, Color.Black.copy(alpha = 0.08f))
    val lg = Shadow(0.dp, 4.dp, 24.dp, Color.Black.copy(alpha = 0.12f))
}
```

3. Copy the source and every file it uses:

```kt title="kotlin/blocks/UsersDetail.kt"
package com.esuiss.ui.blocks

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.key
import androidx.compose.runtime.mutableStateListOf
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.Fill
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.bold.Desktop
import com.adamglin.phosphoricons.bold.DeviceMobile
import com.adamglin.phosphoricons.bold.Globe
import com.adamglin.phosphoricons.fill.ChartBar as FillChartBar
import com.adamglin.phosphoricons.fill.Gear as FillGear
import com.adamglin.phosphoricons.fill.Shield as FillShield
import com.adamglin.phosphoricons.fill.Users as FillUsers
import com.adamglin.phosphoricons.regular.ChartBar
import com.adamglin.phosphoricons.regular.Gear
import com.adamglin.phosphoricons.regular.Shield
import com.adamglin.phosphoricons.regular.Users
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Item
import com.esuiss.ui.components.ItemActions
import com.esuiss.ui.components.ItemContent
import com.esuiss.ui.components.ItemGroup
import com.esuiss.ui.components.ItemGroupVariant
import com.esuiss.ui.components.ItemMedia
import com.esuiss.ui.components.ItemSeparator
import com.esuiss.ui.components.ItemSize
import com.esuiss.ui.components.ItemTitle
import com.esuiss.ui.components.Screen
import com.esuiss.ui.components.ScreenEdge
import com.esuiss.ui.components.SelectSize
import com.esuiss.ui.components.Switch
import com.esuiss.ui.components.TabBar
import com.esuiss.ui.components.TabBarItem
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.patterns.Picker
import com.esuiss.ui.patterns.PickerItemData
import com.esuiss.ui.patterns.SplitView
import com.esuiss.ui.patterns.SplitViewColumn
import com.esuiss.ui.patterns.SplitViewItem
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

private val DetailRevealEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

private class DetailUser(val name: String, val email: String, val role: String, val status: String, val hue: Int)

private val DetailUsers = listOf(
    DetailUser("Jamie Rivera", "jamie@company.com", "Admin", "Active", 250),
    DetailUser("Morgan Lee", "morgan@company.com", "Editor", "Active", 30),
    DetailUser("Riley Chen", "riley@company.com", "Support", "Active", 150),
    DetailUser("Taylor Kim", "taylor@company.com", "Viewer", "Suspended", 200),
    DetailUser("Avery Brooks", "avery@company.com", "Editor", "Invited", 330),
    DetailUser("Jordan Park", "jordan@company.com", "Support", "Active", 100),
)

private val DetailRoles = listOf("Admin", "Editor", "Support", "Viewer").map { PickerItemData(it, it) }

private class DetailSession(val device: String, val place: String, val time: String, val icon: ImageVector)

private fun detailSessions() = listOf(
    DetailSession("Book Pro · Browser", "San Francisco, US", "Now", PhosphorIcons.Bold.Desktop),
    DetailSession("Phone Pro · App", "San Francisco, US", "2 hr ago", PhosphorIcons.Bold.DeviceMobile),
    DetailSession("Desktop · Browser", "Seattle, US", "3 days ago", PhosphorIcons.Bold.Globe),
)

private val DetailSecurity = listOf(
    "Two-factor authentication" to true,
    "Require passkey" to false,
    "Sign-in alerts" to true,
)

private fun detailTint(colors: Colors, hue: Int): Color = when (hue) {
    250 -> colors.indigo
    30 -> colors.orange
    150 -> colors.green
    200 -> colors.blue
    330 -> colors.pink
    else -> colors.teal
}

@Composable
fun UsersDetail(
    modifier: Modifier = Modifier,
    onRoleChange: (email: String, role: String) -> Unit = { _, _ -> },
    onSignOut: (device: String) -> Unit = {},
    onSignOutAll: () -> Unit = {},
    onSecurityChange: (email: String, setting: String, enabled: Boolean) -> Unit = { _, _, _ -> },
    onSendPasswordReset: (email: String) -> Unit = {},
    onNavigate: (section: String) -> Unit = {},
) {
    val colors = EsuissTheme.colors
    var selected by rememberSaveable { mutableStateOf(0) }
    var tab by rememberSaveable { mutableStateOf("Profile") }
    var column by rememberSaveable { mutableStateOf(SplitViewColumn.List) }
    val overrides = remember { mutableStateMapOf<Int, String>() }
    val security = remember { mutableStateMapOf<String, Boolean>() }
    val sessions = remember { mutableStateListOf<DetailSession>().apply { addAll(detailSessions()) } }
    val user = DetailUsers[selected]
    val role = overrides[selected] ?: user.role

    Screen(modifier, edges = setOf(ScreenEdge.Top, ScreenEdge.Left, ScreenEdge.Right)) {
        AdminTabs("users", onNavigate) {
            SplitView(column = column, onColumnChange = { column = it }) {
                SplitViewList(title = "Users") {
                    DetailUsers.forEachIndexed { index, item ->
                        SplitViewItem(
                            isActive = index == selected,
                            onClick = {
                                selected = index
                                tab = "Profile"
                            },
                        ) {
                            Row(horizontalArrangement = Arrangement.spacedBy(10.dp), verticalAlignment = Alignment.CenterVertically) {
                                DetailAvatar(item, 28.dp)
                                Column {
                                    BasicText(item.name, style = Typography.sm.copy(color = colors.label))
                                    BasicText(overrides[index] ?: item.role, style = Typography.xs.copy(color = colors.labelSecondary))
                                }
                            }
                        }
                    }
                }
                SplitViewDetail {
                    key(selected) {
                        DetailAppear {
                            Column(
                                modifier = Modifier.padding(top = 8.dp),
                                verticalArrangement = Arrangement.spacedBy(20.dp),
                            ) {
                                Row(horizontalArrangement = Arrangement.spacedBy(14.dp), verticalAlignment = Alignment.CenterVertically) {
                                    DetailAvatar(user, 64.dp)
                                    Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
                                        BasicText(
                                            user.name,
                                            modifier = Modifier.semantics { heading() },
                                            style = Typography.xl.copy(color = colors.label, fontWeight = FontWeight.Bold),
                                        )
                                        BasicText("${user.email} · $role", style = Typography.sm.copy(color = colors.labelSecondary))
                                    }
                                }
                                ToggleGroup(
                                    value = tab,
                                    onValueChange = { if (it != null) tab = it },
                                    modifier = Modifier.semantics { contentDescription = "Section" },
                                    size = ToggleSize.Sm,
                                    spacing = 0,
                                ) {
                                    listOf("Profile", "Sessions", "Security").forEach { ToggleGroupItem(it, it) }
                                }
                                key(tab) {
                                    DetailAppear {
                                        Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
                                            when (tab) {
                                                "Profile" -> DetailProfile(user, role) { value ->
                                                    onRoleChange(user.email, value)
                                                    overrides[selected] = value
                                                }
                                                "Sessions" -> DetailSessions(
                                                    sessions = sessions,
                                                    onSignOut = { session ->
                                                        onSignOut(session.device)
                                                        sessions.remove(session)
                                                    },
                                                    onSignOutAll = {
                                                        onSignOutAll()
                                                        while (sessions.size > 1) sessions.removeAt(sessions.lastIndex)
                                                    },
                                                )
                                                else -> {
                                                    ItemGroup(variant = ItemGroupVariant.Inset) {
                                                        DetailSecurity.forEachIndexed { index, (label, initial) ->
                                                            if (index > 0) ItemSeparator()
                                                            val keyName = "$selected-$label"
                                                            DetailRow(label) {
                                                                Switch(
                                                                    checked = security[keyName] ?: initial,
                                                                    onCheckedChange = {
                                                                        onSecurityChange(user.email, label, it)
                                                                        security[keyName] = it
                                                                    },
                                                                    modifier = Modifier.semantics { contentDescription = label },
                                                                )
                                                            }
                                                        }
                                                    }
                                                    Button(
                                                        text = "Send Password Reset Link",
                                                        onClick = { onSendPasswordReset(user.email) },
                                                        size = ButtonSize.Sm,
                                                        variant = ButtonVariant.Destructive,
                                                    )
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

@Composable
private fun DetailAppear(content: @Composable () -> Unit) {
    val appear = remember { Animatable(0f) }
    LaunchedEffect(Unit) { appear.animateTo(1f, tween(800, easing = DetailRevealEasing)) }
    Box(
        Modifier.graphicsLayer {
            alpha = appear.value
            translationY = (1f - appear.value) * 8.dp.toPx()
        },
    ) {
        content()
    }
}

@Composable
private fun DetailAvatar(user: DetailUser, size: Dp) {
    val colors = EsuissTheme.colors
    Box(
        Modifier
            .size(size)
            .background(detailTint(colors, user.hue), CircleShape),
        contentAlignment = Alignment.Center,
    ) {
        BasicText(
            user.name.split(" ").mapNotNull { it.firstOrNull() }.joinToString(""),
            style = Typography.xs.copy(color = colors.onMedia, fontWeight = FontWeight.Medium, fontSize = (size.value * 0.38f).sp),
        )
    }
}

@Composable
private fun DetailRow(title: String, action: @Composable () -> Unit) {
    Item(size = ItemSize.Sm, role = null) {
        ItemContent {
            ItemTitle {
                BasicText(
                    title,
                    style = Typography.base.copy(color = EsuissTheme.colors.label),
                    maxLines = 1,
                    overflow = TextOverflow.Ellipsis,
                )
            }
        }
        ItemActions { action() }
    }
}

@Composable
private fun DetailProfile(user: DetailUser, role: String, onRole: (String) -> Unit) {
    val colors = EsuissTheme.colors
    ItemGroup(variant = ItemGroupVariant.Inset) {
        listOf(
            "Full name" to user.name,
            "Email" to user.email,
            "Department" to "Product",
            "Joined" to "March 12, 2024",
        ).forEach { (label, value) ->
            DetailRow(label) { BasicText(value, style = Typography.base.copy(color = colors.labelSecondary), maxLines = 1) }
            ItemSeparator()
        }
        DetailRow("Role") {
            Picker(
                value = role,
                onValueChange = onRole,
                modifier = Modifier.semantics { contentDescription = "Role" },
                items = DetailRoles,
                size = SelectSize.Sm,
            )
        }
        ItemSeparator()
        DetailRow("Status") { BasicText(user.status, style = Typography.base.copy(color = colors.labelSecondary)) }
    }
}

@Composable
private fun DetailSessions(
    sessions: List<DetailSession>,
    onSignOut: (DetailSession) -> Unit,
    onSignOutAll: () -> Unit,
) {
    val colors = EsuissTheme.colors
    ItemGroup(variant = ItemGroupVariant.Inset) {
        sessions.forEachIndexed { index, session ->
            key(session.device) {
                if (index > 0) ItemSeparator(Modifier.padding(start = 40.dp))
                Item(size = ItemSize.Sm, role = null) {
                    ItemMedia {
                        Box(
                            Modifier
                                .size(30.dp)
                                .background(colors.gray, RoundedCornerShape(7.dp)),
                            contentAlignment = Alignment.Center,
                        ) {
                            Icon(session.icon, contentDescription = null, size = 16.dp, tint = colors.onMedia)
                        }
                    }
                    ItemContent {
                        BasicText(
                            session.device,
                            style = Typography.base.copy(color = colors.label),
                            maxLines = 1,
                            overflow = TextOverflow.Ellipsis,
                        )
                        BasicText(
                            "${session.place} · ${session.time}",
                            style = Typography.xs.copy(color = colors.labelSecondary),
                            maxLines = 1,
                            overflow = TextOverflow.Ellipsis,
                        )
                    }
                    ItemActions {
                        if (index == 0) {
                            BasicText("This device", style = Typography.sm.copy(color = colors.label))
                        } else {
                            Button(text = "Sign Out", onClick = { onSignOut(session) }, size = ButtonSize.Sm, variant = ButtonVariant.Secondary)
                        }
                    }
                }
            }
        }
    }
    if (sessions.size > 1) {
        Button(
            text = "Sign Out All Other Sessions",
            onClick = onSignOutAll,
            size = ButtonSize.Sm,
            variant = ButtonVariant.Destructive,
        )
    }
}

private val AdminSections = listOf("users" to "Users", "roles" to "Roles", "log" to "Activity", "settings" to "Settings")

@Composable
private fun AdminTabs(home: String, onNavigate: (String) -> Unit, content: @Composable () -> Unit) {
    val colors = EsuissTheme.colors
    var tab by rememberSaveable { mutableStateOf(home) }
    Column(Modifier.fillMaxSize()) {
        Box(
            Modifier
                .weight(1f)
                .fillMaxWidth(),
        ) {
            if (tab == home) {
                content()
            } else {
                BasicText(
                    "This section isn't part of the sample. Choose ${AdminSections.first { it.first == home }.second}.",
                    modifier = Modifier
                        .align(Alignment.Center)
                        .padding(32.dp),
                    style = Typography.base.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                )
            }
        }
        TabBar(
            value = tab,
            onValueChange = {
                onNavigate(it)
                tab = it
            },
        ) {
            TabBarItem("users", "Users", PhosphorIcons.Regular.Users, selectedIcon = PhosphorIcons.Fill.FillUsers)
            TabBarItem("roles", "Roles", PhosphorIcons.Regular.Shield, selectedIcon = PhosphorIcons.Fill.FillShield)
            TabBarItem("log", "Activity", PhosphorIcons.Regular.ChartBar, selectedIcon = PhosphorIcons.Fill.FillChartBar)
            TabBarItem("settings", "Settings", PhosphorIcons.Regular.Gear, selectedIcon = PhosphorIcons.Fill.FillGear)
        }
    }
}
```

```kt title="kotlin/components/Button.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.TextDecoration
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ButtonVariant { Default, Outline, Secondary, Tinted, Ghost, Plain, Destructive, Link }

enum class ButtonSize(
    val height: Dp,
    val horizontalPadding: Dp,
    val spacing: Dp,
    val iconSize: Dp,
    val blockRadius: Dp,
    val isIcon: Boolean,
) {
    Default(36.dp, 16.dp, 6.dp, 16.dp, Radius.md, false),
    Xs(24.dp, 11.dp, 4.dp, 12.dp, Radius.sm, false),
    Sm(32.dp, 12.dp, 4.dp, 16.dp, Radius.md, false),
    Lg(44.dp, 22.dp, 6.dp, 16.dp, Radius.lg, false),
    Xl(56.dp, 31.dp, 8.dp, 16.dp, Radius.xl, false),
    Icon(36.dp, 0.dp, 6.dp, 16.dp, Radius.md, true),
    IconXs(24.dp, 0.dp, 4.dp, 12.dp, Radius.sm, true),
    IconSm(32.dp, 0.dp, 4.dp, 16.dp, Radius.md, true),
    IconLg(44.dp, 0.dp, 6.dp, 16.dp, Radius.lg, true),
    IconXl(56.dp, 0.dp, 8.dp, 16.dp, Radius.xl, true),
    ;

    val textStyle: TextStyle
        get() = when (this) {
            Xs, IconXs -> Typography.xs2
            Lg, Xl -> Typography.base
            else -> Typography.sm
        }
}

@Composable
fun Button(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Default,
    block: Boolean = false,
    enabled: Boolean = true,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val foreground = buttonForeground(variant, colors, enabled)
    val group = LocalButtonGroup.current?.takeIf { variant != ButtonVariant.Ghost && variant != ButtonVariant.Plain }
    RegisterButtonGroupOutline(group, variant == ButtonVariant.Outline)
    val shape = group.itemShape(if (block) RoundedCornerShape(size.blockRadius) else CircleShape)
    val sizing = when {
        block -> Modifier.fillMaxWidth().height(size.height)
        size.isIcon -> Modifier.size(size.height)
        else -> Modifier.height(size.height)
    }

    Row(
        modifier = modifier
            .then(sizing)
            .clip(shape)
            .background(buttonBackground(variant, colors, pressed && enabled, enabled), shape)
            .then(
                when {
                    variant != ButtonVariant.Outline -> Modifier
                    group != null -> Modifier.buttonGroupEdge(group, colors.separator)
                    else -> Modifier.border(1.dp, colors.separator, shape)
                },
            )
            .clickable(
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                role = Role.Button,
                onClick = onClick,
            )
            .padding(horizontal = size.horizontalPadding),
        horizontalArrangement = Arrangement.spacedBy(size.spacing, Alignment.CenterHorizontally),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalButtonGroup provides null,
            LocalContentStyle provides size.textStyle.copy(
                color = foreground,
                textDecoration = if (variant == ButtonVariant.Link && pressed && enabled) {
                    TextDecoration.Underline
                } else {
                    null
                },
            ),
            LocalContentColor provides foreground,
            LocalIconSize provides size.iconSize,
        ) {
            content()
        }
    }
}

@Composable
fun Button(
    text: String,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Default,
    block: Boolean = false,
    enabled: Boolean = true,
) {
    Button(onClick, modifier, variant, size, block, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}

private fun buttonForeground(variant: ButtonVariant, colors: Colors, enabled: Boolean): Color =
    when (variant) {
        ButtonVariant.Default -> colors.onAccent
        ButtonVariant.Outline, ButtonVariant.Secondary, ButtonVariant.Ghost ->
            if (enabled) colors.label else colors.labelQuaternary
        ButtonVariant.Tinted, ButtonVariant.Plain ->
            if (enabled) colors.link else colors.link.copy(alpha = 0.4f)
        ButtonVariant.Destructive ->
            if (enabled) colors.danger else colors.danger.copy(alpha = 0.4f)
        ButtonVariant.Link -> if (enabled) colors.link else colors.labelQuaternary
    }

private fun buttonBackground(variant: ButtonVariant, colors: Colors, pressed: Boolean, enabled: Boolean): Color =
    when (variant) {
        ButtonVariant.Default -> when {
            !enabled -> colors.accentDisabled
            pressed -> colors.accentPressed
            else -> colors.accent
        }
        ButtonVariant.Outline -> when {
            pressed -> colors.itemPressed
            colors.isDark -> Color.Transparent
            else -> colors.surface
        }
        ButtonVariant.Secondary -> when {
            !enabled -> colors.controlDisabled
            pressed -> colors.controlPressed
            else -> colors.control
        }
        ButtonVariant.Tinted -> if (pressed) colors.accentSurfacePressed else colors.accentSurface
        ButtonVariant.Ghost -> if (pressed) colors.itemPressed else Color.Transparent
        ButtonVariant.Plain -> if (pressed) colors.itemPressed else Color.Transparent
        ButtonVariant.Destructive -> if (pressed) colors.dangerSurfacePressed else colors.dangerSurface
        ButtonVariant.Link -> Color.Transparent
    }
```

```kt title="kotlin/components/ButtonGroup.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.CornerSize
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.Stable
import androidx.compose.runtime.compositionLocalOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.drawOutline
import androidx.compose.ui.graphics.drawscope.Stroke
import androidx.compose.ui.graphics.drawscope.translate
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.Placeable
import androidx.compose.ui.layout.layout
import androidx.compose.ui.layout.layoutId
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.platform.LocalLayoutDirection
import androidx.compose.ui.semantics.isTraversalGroup
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.constrainHeight
import androidx.compose.ui.unit.constrainWidth
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ButtonGroupOrientation { Horizontal, Vertical }

@Stable
internal class ButtonGroupState(val orientation: ButtonGroupOrientation) {
    var nested by mutableIntStateOf(0)
    var outlined by mutableIntStateOf(0)
}

internal val LocalButtonGroup = compositionLocalOf<ButtonGroupState?> { null }

internal object ButtonGroupFill

private object ButtonGroupDivider

internal fun ButtonGroupState?.itemShape(default: Shape): Shape = if (this == null) default else RectangleShape

@Immutable
internal class ButtonGroupItem(val shape: Shape, val modifier: Modifier)

@Composable
internal fun rememberButtonGroupItem(group: ButtonGroupState?, default: Shape): ButtonGroupItem {
    var edges by remember { mutableIntStateOf(0) }
    val horizontal = group?.orientation != ButtonGroupOrientation.Vertical
    val rtl = LocalLayoutDirection.current == LayoutDirection.Rtl
    val shape = remember(edges, horizontal) {
        val round = if (horizontal) CornerSize(50) else CornerSize(Radius.xl2)
        val square = CornerSize(0)
        val start = if (edges and 1 != 0) round else square
        val end = if (edges and 2 != 0) round else square
        if (horizontal) {
            RoundedCornerShape(topStart = start, topEnd = end, bottomEnd = end, bottomStart = start)
        } else {
            RoundedCornerShape(topStart = start, topEnd = start, bottomEnd = end, bottomStart = end)
        }
    }
    if (group == null || group.nested > 0) return ButtonGroupItem(default, Modifier)
    return ButtonGroupItem(
        shape = shape,
        modifier = Modifier.onPlaced { coordinates ->
            val parent = coordinates.parentLayoutCoordinates ?: return@onPlaced
            val bounds = parent.localBoundingBoxOf(coordinates, clipBounds = false)
            val first: Boolean
            val last: Boolean
            if (horizontal) {
                val left = bounds.left <= 0.5f
                val right = bounds.right >= parent.size.width - 0.5f
                first = if (rtl) right else left
                last = if (rtl) left else right
            } else {
                first = bounds.top <= 0.5f
                last = bounds.bottom >= parent.size.height - 0.5f
            }
            edges = (if (first) 1 else 0) or (if (last) 2 else 0)
        },
    )
}

internal fun Modifier.buttonGroupEdge(group: ButtonGroupState?, color: Color): Modifier {
    if (group == null) return this
    return drawBehind {
        val stroke = 1.dp.toPx()
        if (group.orientation == ButtonGroupOrientation.Horizontal) {
            val x = if (layoutDirection == LayoutDirection.Rtl) 0f else size.width - stroke
            drawRect(color, Offset(x, 0f), Size(stroke, size.height))
        } else {
            drawRect(color, Offset(0f, size.height - stroke), Size(size.width, stroke))
        }
    }
}

@Composable
internal fun RegisterButtonGroupOutline(group: ButtonGroupState?, outlined: Boolean) {
    DisposableEffect(group, outlined) {
        if (group != null && outlined) group.outlined += 1
        onDispose {
            if (group != null && outlined) group.outlined -= 1
        }
    }
}

@Composable
fun ButtonGroup(
    modifier: Modifier = Modifier,
    orientation: ButtonGroupOrientation = ButtonGroupOrientation.Horizontal,
    content: @Composable () -> Unit,
) {
    val parent = LocalButtonGroup.current
    DisposableEffect(parent) {
        parent?.let { it.nested += 1 }
        onDispose { parent?.let { it.nested -= 1 } }
    }
    val state = remember(orientation) { ButtonGroupState(orientation) }
    val colors = EsuissTheme.colors
    val joined = state.nested == 0
    val horizontal = orientation == ButtonGroupOrientation.Horizontal
    val shape = if (horizontal) CircleShape else RoundedCornerShape(Radius.xl2)
    val outline = colors.separator
    Layout(
        content = {
            CompositionLocalProvider(LocalButtonGroup provides state, content = content)
        },
        modifier = modifier
            .semantics { isTraversalGroup = true }
            .then(
                if (joined) {
                    Modifier
                        .clip(shape)
                        .drawWithContent {
                            drawContent()
                            if (state.outlined > 0) {
                                val stroke = 1.dp.toPx()
                                val inset = stroke / 2
                                val path = shape.createOutline(
                                    Size(size.width - stroke, size.height - stroke),
                                    layoutDirection,
                                    this,
                                )
                                translate(inset, inset) {
                                    drawOutline(path, outline, style = Stroke(stroke))
                                }
                            }
                        }
                } else {
                    Modifier
                },
            ),
    ) { measurables, constraints ->
        val gap = if (joined) 0 else 8.dp.roundToPx()
        val items = measurables.filter { it.layoutId != ButtonGroupDivider }
        if (horizontal) {
            val height = if (constraints.hasFixedHeight) {
                constraints.maxHeight
            } else {
                constraints.constrainHeight(items.maxOfOrNull { it.maxIntrinsicHeight(Constraints.Infinity) } ?: 0)
            }
            val fills = measurables.count { it.layoutId == ButtonGroupFill }
            val placeables = arrayOfNulls<Placeable>(measurables.size)
            var used = 0
            measurables.forEachIndexed { index, measurable ->
                if (measurable.layoutId != ButtonGroupFill) {
                    val placeable = measurable.measure(Constraints(minHeight = height, maxHeight = height))
                    placeables[index] = placeable
                    used += placeable.width
                }
            }
            val gaps = gap * (items.size - 1).coerceAtLeast(0)
            val remaining = if (constraints.hasBoundedWidth) {
                (constraints.maxWidth - used - gaps).coerceAtLeast(0)
            } else {
                0
            }
            measurables.forEachIndexed { index, measurable ->
                if (measurable.layoutId == ButtonGroupFill) {
                    val placeable = if (constraints.hasBoundedWidth) {
                        val width = remaining / fills
                        measurable.measure(Constraints(width, width, height, height))
                    } else {
                        measurable.measure(Constraints(minHeight = height, maxHeight = height))
                    }
                    placeables[index] = placeable
                    used += placeable.width
                }
            }
            val width = constraints.constrainWidth(used + gaps)
            layout(width, height) {
                var x = 0
                measurables.forEachIndexed { index, measurable ->
                    val placeable = placeables[index] ?: return@forEachIndexed
                    val divider = measurable.layoutId == ButtonGroupDivider
                    placeable.placeRelative(x, 0, zIndex = if (divider) 1f else 0f)
                    if (!divider) x += placeable.width + gap
                }
            }
        } else {
            val width = if (constraints.hasFixedWidth) {
                constraints.maxWidth
            } else {
                constraints.constrainWidth(items.maxOfOrNull { it.maxIntrinsicWidth(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map { it.measure(Constraints(minWidth = width, maxWidth = width)) }
            val gaps = gap * (items.size - 1).coerceAtLeast(0)
            val height = constraints.constrainHeight(
                placeables.filterIndexed { index, _ -> measurables[index].layoutId != ButtonGroupDivider }.sumOf { it.height } + gaps,
            )
            layout(width, height) {
                var y = 0
                measurables.forEachIndexed { index, measurable ->
                    val divider = measurable.layoutId == ButtonGroupDivider
                    placeables[index].placeRelative(0, y, zIndex = if (divider) 1f else 0f)
                    if (!divider) y += placeables[index].height + gap
                }
            }
        }
    }
}

@Composable
fun ButtonGroupText(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val shape = LocalButtonGroup.current.itemShape(CircleShape)
    Row(
        modifier = modifier
            .clip(shape)
            .background(colors.control, shape)
            .padding(horizontal = 10.dp),
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalButtonGroup provides null,
            LocalContentStyle provides Typography.sm.copy(color = colors.label),
            LocalContentColor provides colors.label,
            LocalIconSize provides 16.dp,
        ) {
            content()
        }
    }
}

@Composable
fun ButtonGroupSeparator(
    modifier: Modifier = Modifier,
    orientation: Orientation = Orientation.Vertical,
    color: Color = Color.Unspecified,
) {
    val line = color.takeOrElse { EsuissTheme.colors.label.copy(alpha = 0.2f) }
    Box(
        modifier = modifier
            .layoutId(ButtonGroupDivider)
            .then(
                if (orientation == Orientation.Vertical) {
                    Modifier.layout { measurable, constraints ->
                        val placeable = measurable.measure(constraints.copy(minWidth = 0, maxWidth = 0))
                        layout(0, placeable.height) { placeable.place(0, 0) }
                    }
                } else {
                    Modifier.layout { measurable, constraints ->
                        val placeable = measurable.measure(constraints.copy(minHeight = 0, maxHeight = 0))
                        layout(placeable.width, 0) { placeable.place(0, 0) }
                    }
                },
            )
            .drawBehind {
                val stroke = 1.dp.toPx()
                val inset = 9.dp.toPx()
                if (orientation == Orientation.Vertical) {
                    val x = if (layoutDirection == LayoutDirection.Rtl) -stroke else 0f
                    drawRect(line, Offset(x, inset), Size(stroke, (size.height - inset * 2).coerceAtLeast(0f)))
                } else {
                    drawRect(line, Offset(inset, 0f), Size((size.width - inset * 2).coerceAtLeast(0f), stroke))
                }
            },
    )
}
```

```kt title="kotlin/components/Checkbox.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.selection.triStateToggleable
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.error
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.state.ToggleableState
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Check
import com.adamglin.phosphoricons.regular.Minus
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.shadow

@Composable
fun Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    TriStateCheckbox(
        state = ToggleableState(checked),
        onClick = onCheckedChange?.let { { it(!checked) } },
        modifier = modifier,
        enabled = enabled,
        invalid = invalid,
        interactionSource = interactionSource,
    )
}

@Composable
fun TriStateCheckbox(
    state: ToggleableState,
    onClick: (() -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val pressed by source.collectIsPressedAsState()
    val on = state != ToggleableState.Off
    val shape = RoundedCornerShape(4.dp)
    val look = selectionControlLook(colors, on, enabled, invalid, pressed)
    val toggle = if (onClick != null) {
        Modifier
            .triStateToggleable(
                state = state,
                interactionSource = source,
                indication = null,
                enabled = enabled,
                role = Role.Checkbox,
                onClick = {
                    haptics.toggle(state != ToggleableState.On)
                    onClick()
                },
            )
            .formTouchTarget()
    } else {
        Modifier
    }
    Box(
        modifier = modifier
            .then(toggle)
            .then(if (invalid) Modifier.semantics { error("Invalid") } else Modifier)
            .size(16.dp)
            .then(if (look.shadow) Modifier.shadow(FormShadowXs, shape) else Modifier)
            .background(look.background, shape)
            .border(1.dp, look.border, shape),
        contentAlignment = Alignment.Center,
    ) {
        if (on) {
            Icon(
                if (state == ToggleableState.Indeterminate) PhosphorIcons.Regular.Minus else PhosphorIcons.Regular.Check,
                contentDescription = null,
                size = 14.dp,
                tint = colors.onAccent,
            )
        }
    }
}

internal class SelectionControlLook(val background: Color, val border: Color, val shadow: Boolean)

internal fun selectionControlLook(
    colors: Colors,
    on: Boolean,
    enabled: Boolean,
    invalid: Boolean,
    pressed: Boolean,
): SelectionControlLook = when {
    on && !enabled -> SelectionControlLook(colors.accentDisabled, Color.Transparent, false)
    on -> {
        val color = if (pressed) colors.accentPressed else colors.accent
        SelectionControlLook(color, color, false)
    }
    !enabled -> SelectionControlLook(
        colors.controlDisabled,
        if (colors.isDark) Color.Transparent else colors.label.copy(alpha = 0.1f),
        false,
    )
    colors.isDark -> SelectionControlLook(
        colors.labelQuaternary,
        if (invalid) colors.danger else Color.Transparent,
        false,
    )
    else -> SelectionControlLook(
        if (pressed) colors.control else colors.surface,
        if (invalid) colors.danger else colors.label.copy(alpha = 0.25f),
        true,
    )
}
```

```kt title="kotlin/components/Content.kt"
package com.esuiss.ui.components

import androidx.compose.runtime.compositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

val LocalIconSize = compositionLocalOf { 20.dp }
```

```kt title="kotlin/components/Field.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.LayoutScopeMarker
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.layout.layout
import androidx.compose.ui.platform.LocalConfiguration
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class FieldOrientation { Vertical, Horizontal, Responsive }

enum class FieldGroupVariant { Default, Inset }

enum class FieldLegendVariant { Legend, Label }

@Immutable
internal class FieldState(val enabled: Boolean, val invalid: Boolean)

internal val LocalFieldState = staticCompositionLocalOf { FieldState(enabled = true, invalid = false) }

private val LocalFieldSetInset = staticCompositionLocalOf { false }

private val LocalFieldGroupVariant = staticCompositionLocalOf<FieldGroupVariant?> { null }

private val LocalFieldInset = staticCompositionLocalOf { false }

@LayoutScopeMarker
@Immutable
interface FieldScope {
    fun Modifier.weight(weight: Float): Modifier
}

private class RowFieldScope(private val scope: RowScope) : FieldScope {
    override fun Modifier.weight(weight: Float): Modifier = with(scope) { this@weight.weight(weight, true) }
}

private object ColumnFieldScope : FieldScope {
    override fun Modifier.weight(weight: Float): Modifier = this
}

@Composable
fun FieldSet(
    modifier: Modifier = Modifier,
    variant: FieldGroupVariant = FieldGroupVariant.Default,
    enabled: Boolean = true,
    content: @Composable ColumnScope.() -> Unit,
) {
    val inset = variant == FieldGroupVariant.Inset
    CompositionLocalProvider(
        LocalFieldSetInset provides inset,
        LocalFieldState provides FieldState(enabled, LocalFieldState.current.invalid),
    ) {
        Column(
            modifier = modifier.fillMaxWidth(),
            verticalArrangement = Arrangement.spacedBy(if (inset) 8.dp else 24.dp),
            content = content,
        )
    }
}

@Composable
fun FieldLegend(
    text: String,
    modifier: Modifier = Modifier,
    variant: FieldLegendVariant = FieldLegendVariant.Legend,
) {
    val colors = EsuissTheme.colors
    val inset = LocalFieldSetInset.current
    val enabled = LocalFieldState.current.enabled
    val style = if (inset) {
        Typography.xs.copy(color = if (enabled) colors.labelSecondary else colors.labelQuaternary)
    } else {
        Typography.base.copy(color = if (enabled) colors.label else colors.labelQuaternary, fontWeight = FontWeight.SemiBold)
    }
    BasicText(
        text = if (inset) text.uppercase() else text,
        modifier = modifier
            .then(if (variant == FieldLegendVariant.Legend) Modifier.semantics { heading() } else Modifier)
            .padding(start = if (inset) 16.dp else 0.dp, bottom = if (inset) 0.dp else 12.dp),
        style = style,
    )
}

@Composable
fun FieldGroup(
    modifier: Modifier = Modifier,
    variant: FieldGroupVariant = FieldGroupVariant.Default,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    CompositionLocalProvider(
        LocalFieldSetInset provides false,
        LocalFieldGroupVariant provides variant,
    ) {
        if (variant == FieldGroupVariant.Inset) {
            FormDividedStack(
                orientation = Orientation.Vertical,
                dividerColor = colors.separator,
                modifier = modifier
                    .fillMaxWidth()
                    .clip(RoundedCornerShape(Radius.xl2))
                    .background(colors.surfaceSecondary),
                dividerInsetStart = 16.dp,
                content = content,
            )
        } else {
            Column(
                modifier = modifier.fillMaxWidth(),
                verticalArrangement = Arrangement.spacedBy(28.dp),
            ) {
                content()
            }
        }
    }
}

@Composable
fun Field(
    modifier: Modifier = Modifier,
    orientation: FieldOrientation = FieldOrientation.Vertical,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = false,
    content: @Composable FieldScope.() -> Unit,
) {
    val inset = LocalFieldGroupVariant.current == FieldGroupVariant.Inset
    val horizontal = when (orientation) {
        FieldOrientation.Vertical -> false
        FieldOrientation.Horizontal -> true
        FieldOrientation.Responsive -> LocalConfiguration.current.screenWidthDp >= 768
    }
    val sizing = modifier
        .fillMaxWidth()
        .then(if (inset) Modifier.heightIn(min = 44.dp).padding(horizontal = 16.dp, vertical = 6.dp) else Modifier)
    CompositionLocalProvider(
        LocalFieldGroupVariant provides null,
        LocalFieldInset provides inset,
        LocalFieldState provides FieldState(enabled, invalid),
    ) {
        if (horizontal) {
            Row(
                modifier = sizing,
                horizontalArrangement = Arrangement.spacedBy(12.dp),
                verticalAlignment = Alignment.CenterVertically,
            ) {
                val scope = remember(this) { RowFieldScope(this) }
                scope.content()
            }
        } else {
            Column(
                modifier = sizing,
                verticalArrangement = Arrangement.spacedBy(12.dp, Alignment.CenterVertically),
            ) {
                ColumnFieldScope.content()
            }
        }
    }
}

@Composable
fun FieldScope.FieldContent(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(
        modifier = modifier.weight(1f),
        verticalArrangement = Arrangement.spacedBy(4.dp),
        content = content,
    )
}

@Composable
fun FieldLabel(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val enabled = LocalFieldState.current.enabled
    BasicText(
        text = text,
        modifier = modifier,
        style = Typography.base.copy(
            color = if (enabled) colors.label else colors.labelQuaternary,
            fontWeight = if (LocalFieldInset.current) FontWeight.Normal else FontWeight.SemiBold,
        ),
    )
}

@Composable
fun FieldTitle(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val enabled = LocalFieldState.current.enabled
    BasicText(
        text = text,
        modifier = modifier,
        style = Typography.base.copy(
            color = if (enabled) colors.label else colors.labelQuaternary,
            fontWeight = FontWeight.SemiBold,
        ),
    )
}

@Composable
fun FieldDescription(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val inset = LocalFieldSetInset.current
    BasicText(
        text = text,
        modifier = modifier.padding(start = if (inset) 16.dp else 0.dp),
        style = (if (inset) Typography.xs else Typography.sm).copy(color = colors.labelSecondary),
    )
}

@Composable
fun FieldSeparator(
    modifier: Modifier = Modifier,
    text: String? = null,
) {
    val colors = EsuissTheme.colors
    Box(
        modifier = modifier
            .fillMaxWidth()
            .layout { measurable, constraints ->
                val placeable = measurable.measure(constraints)
                val overlap = 8.dp.roundToPx()
                val height = (placeable.height - overlap * 2).coerceAtLeast(0)
                layout(placeable.width, height) { placeable.place(0, -overlap) }
            }
            .heightIn(min = 20.dp),
        contentAlignment = Alignment.Center,
    ) {
        Separator()
        if (text != null) {
            BasicText(
                text = text,
                modifier = Modifier.background(colors.surface).padding(horizontal = 8.dp),
                style = Typography.sm.copy(color = colors.labelSecondary),
            )
        }
    }
}

@Composable
fun FieldError(text: String?, modifier: Modifier = Modifier) {
    if (text.isNullOrEmpty()) return
    BasicText(
        text = text,
        modifier = modifier.semantics { liveRegion = LiveRegionMode.Polite },
        style = Typography.sm.copy(color = EsuissTheme.colors.danger),
    )
}

@Composable
fun FieldError(errors: List<String?>, modifier: Modifier = Modifier) {
    val messages = errors.filterNotNull().filter { it.isNotEmpty() }.distinct()
    val text = when (messages.size) {
        0 -> null
        1 -> messages[0]
        else -> messages.joinToString("\n") { "• $it" }
    }
    FieldError(text, modifier)
}
```

```kt title="kotlin/components/FormSupport.kt"
package com.esuiss.ui.components

import android.provider.Settings
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.text.selection.TextSelectionColors
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.layout
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.constrainHeight
import androidx.compose.ui.unit.constrainWidth
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.Shadow

internal val FormShadowXs = Shadow(0.dp, 1.dp, 2.dp, Color.Black.copy(alpha = 0.05f))

internal val FormShadowSm = Shadow(0.dp, 1.dp, 3.dp, Color.Black.copy(alpha = 0.1f))

internal val FormEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

internal fun Modifier.formTouchTarget(): Modifier = layout { measurable, constraints ->
    val minimum = 48.dp.roundToPx()
    val placeable = measurable.measure(constraints)
    val width = constraints.constrainWidth(maxOf(placeable.width, minimum))
    val height = constraints.constrainHeight(maxOf(placeable.height, minimum))
    layout(width, height) {
        placeable.place((width - placeable.width) / 2, (height - placeable.height) / 2)
    }
}

@Composable
internal fun formReducedMotion(): Boolean {
    val context = LocalContext.current
    return remember(context) {
        Settings.Global.getFloat(context.contentResolver, Settings.Global.ANIMATOR_DURATION_SCALE, 1f) == 0f
    }
}

internal fun formSelectionColors(colors: Colors) = TextSelectionColors(
    handleColor = colors.accent,
    backgroundColor = colors.accent.copy(alpha = 0.3f),
)

internal fun Modifier.formInputSurface(
    colors: Colors,
    shape: Shape,
    focused: Boolean,
    invalid: Boolean,
    enabled: Boolean,
): Modifier {
    val background = when {
        !enabled -> colors.controlDisabled
        invalid -> colors.danger.copy(alpha = if (colors.isDark) 0.1f else 0.05f)
        else -> colors.control
    }
    val border = when {
        invalid -> colors.danger
        focused -> colors.focus
        else -> Color.Transparent
    }
    return clip(shape).background(background, shape).border(1.dp, border, shape)
}

@Composable
internal fun FormDividedStack(
    orientation: Orientation,
    dividerColor: Color,
    modifier: Modifier = Modifier,
    dividerInsetStart: Dp = 0.dp,
    content: @Composable () -> Unit,
) {
    val boundaries = remember { mutableStateOf(IntArray(0)) }
    val vertical = orientation == Orientation.Vertical
    Layout(
        content = content,
        modifier = modifier.drawWithContent {
            drawContent()
            val stroke = 1.dp.toPx()
            val inset = dividerInsetStart.toPx()
            boundaries.value.forEach { position ->
                if (vertical) {
                    val start = if (layoutDirection == LayoutDirection.Rtl) 0f else inset
                    drawRect(dividerColor, Offset(start, position.toFloat()), Size(size.width - inset, stroke))
                } else {
                    val x = if (layoutDirection == LayoutDirection.Rtl) size.width - position - stroke else position.toFloat()
                    drawRect(dividerColor, Offset(x, 0f), Size(stroke, size.height))
                }
            }
        },
    ) { measurables, constraints ->
        if (vertical) {
            val width = if (constraints.hasFixedWidth) {
                constraints.maxWidth
            } else {
                constraints.constrainWidth(measurables.maxOfOrNull { it.maxIntrinsicWidth(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map {
                it.measure(Constraints(minWidth = width, maxWidth = width))
            }
            val offsets = IntArray(placeables.size)
            var y = 0
            placeables.forEachIndexed { index, placeable ->
                offsets[index] = y
                y += placeable.height
            }
            val next = offsets.drop(1).toIntArray()
            if (!next.contentEquals(boundaries.value)) boundaries.value = next
            layout(width, constraints.constrainHeight(y)) {
                placeables.forEachIndexed { index, placeable -> placeable.placeRelative(0, offsets[index]) }
            }
        } else {
            val height = if (constraints.hasFixedHeight) {
                constraints.maxHeight
            } else {
                constraints.constrainHeight(measurables.maxOfOrNull { it.maxIntrinsicHeight(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map {
                it.measure(Constraints(minHeight = height, maxHeight = height))
            }
            val offsets = IntArray(placeables.size)
            var x = 0
            placeables.forEachIndexed { index, placeable ->
                offsets[index] = x
                x += placeable.width
            }
            val next = offsets.drop(1).toIntArray()
            if (!next.contentEquals(boundaries.value)) boundaries.value = next
            layout(constraints.constrainWidth(x), height) {
                placeables.forEachIndexed { index, placeable -> placeable.placeRelative(offsets[index], 0) }
            }
        }
    }
}
```

```kt title="kotlin/components/Haptics.kt"
package com.esuiss.ui.components

import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.hapticfeedback.HapticFeedback
import androidx.compose.ui.hapticfeedback.HapticFeedbackType
import androidx.compose.ui.platform.LocalHapticFeedback

val LocalHapticsEnabled = staticCompositionLocalOf { true }

@Composable
fun ProvideHaptics(enabled: Boolean, content: @Composable () -> Unit) {
    CompositionLocalProvider(LocalHapticsEnabled provides enabled, content = content)
}

internal class Haptics(private val feedback: HapticFeedback, private val enabled: Boolean) {
    fun perform(type: HapticFeedbackType) {
        if (enabled) feedback.performHapticFeedback(type)
    }

    fun toggle(on: Boolean) = perform(if (on) HapticFeedbackType.ToggleOn else HapticFeedbackType.ToggleOff)

    fun selection() = perform(HapticFeedbackType.SegmentTick)
}

@Composable
internal fun rememberHaptics(): Haptics {
    val feedback = LocalHapticFeedback.current
    val enabled = LocalHapticsEnabled.current
    return remember(feedback, enabled) { Haptics(feedback, enabled) }
}
```

```kt title="kotlin/components/Header.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.animate
import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.tween
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableFloatStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clipToBounds
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.input.nestedscroll.NestedScrollConnection
import androidx.compose.ui.input.nestedscroll.NestedScrollSource
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.layoutId
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Velocity
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.CaretLeft
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

private val HeaderBarHeight = 44.dp

private enum class HeaderSlot { Back, Start, End, Title, LargeTitle }

enum class HeaderActionsSide { Leading, Trailing }

@Stable
class HeaderState {
    internal var range by mutableFloatStateOf(0f)
    internal var offset by mutableFloatStateOf(0f)

    val collapsedFraction: Float
        get() = if (range <= 0f) 1f else (offset / range).coerceIn(0f, 1f)

    val nestedScrollConnection: NestedScrollConnection = object : NestedScrollConnection {
        override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset {
            if (available.y >= 0f || range <= 0f) return Offset.Zero
            val next = (offset - available.y).coerceAtMost(range)
            val used = next - offset
            offset = next
            return Offset(0f, -used)
        }

        override fun onPostScroll(consumed: Offset, available: Offset, source: NestedScrollSource): Offset {
            if (available.y <= 0f || range <= 0f) return Offset.Zero
            val next = (offset - available.y).coerceAtLeast(0f)
            val used = offset - next
            offset = next
            return Offset(0f, used)
        }

        override suspend fun onPostFling(consumed: Velocity, available: Velocity): Velocity {
            settle()
            return Velocity.Zero
        }
    }

    internal suspend fun settle() {
        if (range <= 0f || offset <= 0f || offset >= range) return
        val target = if (offset < range / 2f) 0f else range
        animate(offset, target, animationSpec = tween(250)) { value, _ -> offset = value }
    }
}

@Composable
fun rememberHeaderState(): HeaderState = remember { HeaderState() }

private val LocalHeaderState = staticCompositionLocalOf<HeaderState?> { null }

@Composable
fun Header(
    modifier: Modifier = Modifier,
    state: HeaderState = rememberHeaderState(),
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    val collapsed = state.range > 0f && state.offset >= state.range
    val separator by animateFloatAsState(if (state.range <= 0f || collapsed) 1f else 0f, tween(150), label = "separator")
    CompositionLocalProvider(LocalHeaderState provides state) {
        Layout(
            content = content,
            modifier = modifier
                .clipToBounds()
                .drawWithContent {
                    drawContent()
                    val stroke = 1.dp.toPx()
                    drawRect(colors.separator.copy(alpha = colors.separator.alpha * separator), Offset(0f, size.height - stroke), Size(size.width, stroke))
                },
        ) { measurables, constraints ->
            val width = constraints.maxWidth
            val bar = HeaderBarHeight.roundToPx()
            val inset = 8.dp.roundToPx()
            val loose = Constraints(maxWidth = width, maxHeight = bar)
            val back = measurables.firstOrNull { it.layoutId == HeaderSlot.Back }?.measure(loose)
            val start = measurables.firstOrNull { it.layoutId == HeaderSlot.Start }?.measure(loose)
            val end = measurables.firstOrNull { it.layoutId == HeaderSlot.End }?.measure(loose)
            val leading = (back?.width ?: 0) + (start?.width ?: 0)
            val side = maxOf(leading, end?.width ?: 0) + inset
            val titleWidth = (width - side * 2).coerceAtLeast(0)
            val title = measurables.firstOrNull { it.layoutId == HeaderSlot.Title }
                ?.measure(Constraints(maxWidth = titleWidth, maxHeight = bar))
            val large = measurables.firstOrNull { it.layoutId == HeaderSlot.LargeTitle }
                ?.measure(Constraints(minWidth = width, maxWidth = width))
            val range = (large?.height ?: 0).toFloat()
            if (state.range != range) state.range = range
            val offset = state.offset.coerceIn(0f, range).toInt()
            val height = bar + (large?.height ?: 0) - offset
            layout(width, height) {
                var x = inset
                back?.let {
                    it.placeRelative(x, (bar - it.height) / 2)
                    x += it.width
                }
                start?.placeRelative(x, (bar - (start.height)) / 2)
                end?.let { it.placeRelative(width - inset - it.width, (bar - it.height) / 2) }
                title?.placeRelative((width - title.width) / 2, (bar - title.height) / 2)
                large?.placeRelative(0, bar - offset)
            }
        }
    }
}

@Composable
fun HeaderTitle(
    text: String,
    modifier: Modifier = Modifier,
    subtitle: String? = null,
) {
    val colors = EsuissTheme.colors
    val state = LocalHeaderState.current
    Column(
        modifier = modifier
            .layoutId(HeaderSlot.Title)
            .graphicsLayer {
                val fraction = state?.collapsedFraction ?: 1f
                alpha = if (state == null || state.range <= 0f) 1f else ((fraction - 0.6f) / 0.4f).coerceIn(0f, 1f)
            }
            .semantics { heading() },
        horizontalAlignment = Alignment.CenterHorizontally,
    ) {
        BasicText(
            text,
            style = Typography.base.copy(color = colors.label, fontWeight = FontWeight.SemiBold, textAlign = TextAlign.Center),
            maxLines = 1,
            overflow = TextOverflow.Ellipsis,
        )
        if (subtitle != null) {
            BasicText(
                subtitle,
                style = Typography.xs2.copy(color = colors.labelSecondary, textAlign = TextAlign.Center),
                maxLines = 1,
                overflow = TextOverflow.Ellipsis,
            )
        }
    }
}

@Composable
fun HeaderLargeTitle(
    text: String,
    modifier: Modifier = Modifier,
    subtitle: String? = null,
) {
    val colors = EsuissTheme.colors
    val state = LocalHeaderState.current
    Column(
        modifier = modifier
            .layoutId(HeaderSlot.LargeTitle)
            .graphicsLayer {
                val fraction = state?.collapsedFraction ?: 0f
                alpha = (1f - fraction * 1.4f).coerceIn(0f, 1f)
            }
            .padding(start = 16.dp, end = 16.dp, top = 4.dp, bottom = 8.dp),
        verticalArrangement = Arrangement.spacedBy(2.dp),
    ) {
        BasicText(
            text,
            modifier = Modifier.semantics { heading() },
            style = Typography.xl3.copy(color = colors.label, fontWeight = FontWeight.Bold),
            maxLines = 2,
            overflow = TextOverflow.Ellipsis,
        )
        if (subtitle != null) {
            BasicText(subtitle, style = Typography.sm.copy(color = colors.labelSecondary))
        }
    }
}

@Composable
fun HeaderBack(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    text: String? = "Back",
    contentDescription: String = text ?: "Back",
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Row(
        modifier = modifier
            .layoutId(HeaderSlot.Back)
            .height(HeaderBarHeight)
            .clickable(
                interactionSource = interaction,
                indication = null,
                role = Role.Button,
                onClickLabel = contentDescription,
                onClick = onClick,
            )
            .graphicsLayer { alpha = if (pressed) 0.4f else 1f }
            .padding(end = 8.dp),
        horizontalArrangement = Arrangement.spacedBy(2.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        Icon(PhosphorIcons.Regular.CaretLeft, contentDescription = if (text == null) contentDescription else null, size = 24.dp, tint = colors.link)
        if (text != null) {
            BasicText(text, style = Typography.base.copy(color = colors.link), maxLines = 1)
        }
    }
}

@Composable
fun HeaderActions(
    modifier: Modifier = Modifier,
    side: HeaderActionsSide = HeaderActionsSide.Trailing,
    content: @Composable RowScope.() -> Unit,
) {
    Row(
        modifier = modifier.layoutId(if (side == HeaderActionsSide.Leading) HeaderSlot.Start else HeaderSlot.End),
        horizontalArrangement = Arrangement.spacedBy(4.dp),
        verticalAlignment = Alignment.CenterVertically,
        content = content,
    )
}
```

```kt title="kotlin/components/Icon.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.ColorFilter
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.unit.Dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Icon(
    imageVector: ImageVector,
    contentDescription: String?,
    modifier: Modifier = Modifier,
    size: Dp = LocalIconSize.current,
    tint: Color = LocalContentColor.current.takeOrElse { EsuissTheme.colors.label },
) {
    Image(
        imageVector = imageVector,
        contentDescription = contentDescription,
        modifier = modifier.size(size),
        colorFilter = ColorFilter.tint(tint),
    )
}
```

```kt title="kotlin/components/Item.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.combinedClickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxScope
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.Measurable
import androidx.compose.ui.layout.Placeable
import androidx.compose.ui.layout.layoutId
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.isTraversalGroup
import androidx.compose.ui.semantics.selected
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ItemVariant { Default, Outline, Muted }

enum class ItemSize(
    internal val horizontalPadding: Dp,
    internal val verticalPadding: Dp,
    internal val gap: Dp,
    internal val contentGap: Dp,
    internal val imageSize: Dp,
) {
    Default(16.dp, 14.dp, 14.dp, 4.dp, 40.dp),
    Sm(14.dp, 12.dp, 14.dp, 4.dp, 32.dp),
    Xs(12.dp, 10.dp, 10.dp, 2.dp, 24.dp),
}

enum class ItemGroupVariant { Default, Inset }

enum class ItemMediaVariant { Default, Icon, Image }

private enum class ItemSlot { Media, Content, Actions, Header, Footer }

@Stable
private class ItemState(val size: ItemSize) {
    var descriptions by mutableIntStateOf(0)
}

private val LocalItemState = staticCompositionLocalOf<ItemState?> { null }

internal val LocalItemGroupVariant = staticCompositionLocalOf<ItemGroupVariant?> { null }

@Composable
fun ItemGroup(
    modifier: Modifier = Modifier,
    variant: ItemGroupVariant = ItemGroupVariant.Default,
    content: @Composable ColumnScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val inset = variant == ItemGroupVariant.Inset
    val shape = RoundedCornerShape(Radius.xl2)
    Column(
        modifier = modifier
            .fillMaxWidth()
            .then(if (inset) Modifier.clip(shape).background(colors.surfaceSecondary, shape) else Modifier)
            .semantics { isTraversalGroup = true },
        verticalArrangement = if (inset) Arrangement.Top else Arrangement.spacedBy(16.dp),
    ) {
        CompositionLocalProvider(LocalItemGroupVariant provides variant) {
            content()
        }
    }
}

@Composable
fun ItemSeparator(modifier: Modifier = Modifier) {
    val inset = LocalItemGroupVariant.current == ItemGroupVariant.Inset
    Box(
        modifier = modifier
            .fillMaxWidth()
            .padding(start = if (inset) 16.dp else 0.dp)
            .padding(vertical = if (inset) 0.dp else 8.dp)
            .height(1.dp)
            .background(EsuissTheme.colors.separator),
    )
}

@Composable
fun Item(
    modifier: Modifier = Modifier,
    variant: ItemVariant = ItemVariant.Default,
    size: ItemSize = ItemSize.Default,
    onClick: (() -> Unit)? = null,
    onLongClick: (() -> Unit)? = null,
    enabled: Boolean = true,
    selected: Boolean? = null,
    role: Role? = Role.Button,
    onClickLabel: String? = null,
    content: @Composable () -> Unit,
) {
    val inset = LocalItemGroupVariant.current == ItemGroupVariant.Inset
    val shape = if (inset) RectangleShape else RoundedCornerShape(Radius.xl)
    ItemFrame(
        modifier = modifier,
        variant = variant,
        size = size,
        shape = shape,
        padding = PaddingValues(horizontal = size.horizontalPadding, vertical = size.verticalPadding),
        onClick = onClick,
        onLongClick = onLongClick,
        enabled = enabled,
        selected = selected,
        role = role,
        onClickLabel = onClickLabel,
        content = content,
    )
}

@Composable
internal fun ItemFrame(
    modifier: Modifier,
    variant: ItemVariant,
    size: ItemSize,
    shape: Shape,
    padding: PaddingValues,
    onClick: (() -> Unit)?,
    onLongClick: (() -> Unit)?,
    enabled: Boolean,
    selected: Boolean?,
    role: Role?,
    onClickLabel: String?,
    minHeight: Dp = 0.dp,
    gap: Dp = size.gap,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val state = remember(size) { ItemState(size) }
    val interactive = onClick != null || onLongClick != null
    val background = when {
        pressed && enabled && interactive -> colors.itemPressed
        selected == true -> colors.itemSelected
        variant == ItemVariant.Muted -> colors.surfaceSecondary.copy(alpha = colors.surfaceSecondary.alpha * 0.5f)
        else -> Color.Transparent
    }
    val foreground = if (enabled) colors.label else colors.labelQuaternary
    val behaviour = if (interactive) {
        Modifier
            .heightIn(min = maxOf(minHeight, 48.dp))
            .combinedClickable(
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                onClickLabel = onClickLabel,
                role = role,
                onLongClick = onLongClick,
                onClick = onClick ?: {},
            )
    } else {
        Modifier
            .heightIn(min = minHeight)
            .semantics(mergeDescendants = true) {}
    }
    Box(
        modifier = modifier
            .fillMaxWidth()
            .clip(shape)
            .background(background, shape)
            .then(if (variant == ItemVariant.Outline) Modifier.border(1.dp, colors.separator, shape) else Modifier)
            .then(if (selected != null) Modifier.semantics { this.selected = selected } else Modifier)
            .then(behaviour)
            .padding(padding),
        contentAlignment = Alignment.CenterStart,
    ) {
        CompositionLocalProvider(
            LocalItemState provides state,
            LocalContentStyle provides Typography.base.copy(color = foreground),
            LocalContentColor provides foreground,
            LocalIconSize provides 16.dp,
        ) {
            ItemLayout(gap, state.descriptions > 0, content)
        }
    }
}

@Composable
private fun ItemLayout(gap: Dp, mediaAtTop: Boolean, content: @Composable () -> Unit) {
    Layout(content = content, modifier = Modifier.fillMaxWidth()) { measurables, constraints ->
        val gapPx = gap.roundToPx()
        val nudge = if (mediaAtTop) 2.dp.roundToPx() else 0
        val lines = mutableListOf<List<Measurable>>()
        var current = mutableListOf<Measurable>()
        measurables.forEach { measurable ->
            val slot = measurable.layoutId
            if (slot == ItemSlot.Header || slot == ItemSlot.Footer) {
                if (current.isNotEmpty()) lines += current
                lines += listOf(measurable)
                current = mutableListOf()
            } else {
                current += measurable
            }
        }
        if (current.isNotEmpty()) lines += current
        val bounded = constraints.hasBoundedWidth
        val available = if (bounded) constraints.maxWidth else Constraints.Infinity
        val measured = lines.map { line ->
            val placeables = arrayOfNulls<Placeable>(line.size)
            val flexIndex = line.indexOfFirst { it.layoutId == ItemSlot.Content }
            var used = gapPx * (line.size - 1).coerceAtLeast(0)
            line.forEachIndexed { index, measurable ->
                if (index == flexIndex) return@forEachIndexed
                val full = measurable.layoutId == ItemSlot.Header || measurable.layoutId == ItemSlot.Footer
                val childConstraints = when {
                    full && bounded -> Constraints(minWidth = available, maxWidth = available)
                    bounded -> Constraints(maxWidth = (available - used).coerceAtLeast(0))
                    else -> Constraints()
                }
                val placeable = measurable.measure(childConstraints)
                placeables[index] = placeable
                used += placeable.width
            }
            if (flexIndex >= 0) {
                val remaining = (available - used).coerceAtLeast(0)
                placeables[flexIndex] = line[flexIndex].measure(
                    if (bounded) Constraints(minWidth = remaining, maxWidth = remaining) else Constraints(),
                )
            }
            placeables.requireNoNulls().toList()
        }
        val width = if (bounded) {
            constraints.maxWidth
        } else {
            measured.maxOfOrNull { line -> line.sumOf { it.width } + gapPx * (line.size - 1).coerceAtLeast(0) } ?: 0
        }
        val lineHeights = measured.mapIndexed { lineIndex, line ->
            line.mapIndexed { index, placeable ->
                val isMedia = lines[lineIndex][index].layoutId == ItemSlot.Media
                placeable.height + if (isMedia) nudge else 0
            }.maxOrNull() ?: 0
        }
        val height = (lineHeights.sum() + gapPx * (measured.size - 1).coerceAtLeast(0))
            .coerceIn(constraints.minHeight, constraints.maxHeight)
        layout(width, height) {
            var y = 0
            measured.forEachIndexed { lineIndex, line ->
                val lineHeight = lineHeights[lineIndex]
                var x = 0
                line.forEachIndexed { index, placeable ->
                    val isMedia = lines[lineIndex][index].layoutId == ItemSlot.Media
                    val top = if (isMedia && mediaAtTop) nudge else (lineHeight - placeable.height) / 2
                    placeable.placeRelative(x, y + top)
                    x += placeable.width + gapPx
                }
                y += lineHeight + gapPx
            }
        }
    }
}

@Composable
fun ItemMedia(
    modifier: Modifier = Modifier,
    variant: ItemMediaVariant = ItemMediaVariant.Default,
    content: @Composable BoxScope.() -> Unit,
) {
    val size = LocalItemState.current?.size ?: ItemSize.Default
    val sizing = when (variant) {
        ItemMediaVariant.Image -> {
            val shape = RoundedCornerShape(if (size == ItemSize.Xs) Radius.sm else Radius.md)
            Modifier.size(size.imageSize).clip(shape)
        }
        else -> Modifier
    }
    Box(
        modifier = modifier.layoutId(ItemSlot.Media).then(sizing),
        contentAlignment = Alignment.Center,
    ) {
        CompositionLocalProvider(LocalIconSize provides if (variant == ItemMediaVariant.Icon) 16.dp else LocalIconSize.current) {
            content()
        }
    }
}

@Composable
fun ItemContent(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    val size = LocalItemState.current?.size ?: ItemSize.Default
    Column(
        modifier = modifier.layoutId(ItemSlot.Content),
        verticalArrangement = Arrangement.spacedBy(size.contentGap),
        content = content,
    )
}

@Composable
fun ItemTitle(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    val color = LocalContentColor.current
    Row(
        modifier = modifier,
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.base.copy(color = color, fontWeight = FontWeight.SemiBold),
        ) {
            content()
        }
    }
}

@Composable
fun ItemTitle(text: String, modifier: Modifier = Modifier) {
    val color = LocalContentColor.current
    BasicText(
        text,
        modifier = modifier,
        style = Typography.base.copy(color = color, fontWeight = FontWeight.SemiBold),
        maxLines = 1,
        overflow = TextOverflow.Ellipsis,
    )
}

@Composable
fun ItemDescription(text: String, modifier: Modifier = Modifier) {
    val state = LocalItemState.current
    if (state != null) {
        DisposableEffect(state) {
            state.descriptions += 1
            onDispose { state.descriptions -= 1 }
        }
    }
    BasicText(
        text,
        modifier = modifier,
        style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
        maxLines = 2,
        overflow = TextOverflow.Ellipsis,
    )
}

@Composable
fun ItemActions(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    Row(
        modifier = modifier.layoutId(ItemSlot.Actions),
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
        content = content,
    )
}

@Composable
fun ItemHeader(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    Row(
        modifier = modifier.layoutId(ItemSlot.Header),
        horizontalArrangement = Arrangement.SpaceBetween,
        verticalAlignment = Alignment.CenterVertically,
        content = content,
    )
}

@Composable
fun ItemFooter(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    Row(
        modifier = modifier.layoutId(ItemSlot.Footer),
        horizontalArrangement = Arrangement.SpaceBetween,
        verticalAlignment = Alignment.CenterVertically,
        content = content,
    )
}
```

```kt title="kotlin/components/Label.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun Label(
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val color = if (enabled) colors.label else colors.labelQuaternary
    Row(
        modifier = modifier,
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.base.copy(color = color, fontWeight = FontWeight.SemiBold),
            LocalContentColor provides color,
        ) {
            content()
        }
    }
}

@Composable
fun Label(
    text: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    Label(modifier, enabled) {
        BasicText(text, style = LocalContentStyle.current)
    }
}
```

```kt title="kotlin/components/Overlay.kt"
package com.esuiss.ui.components

import android.os.Build
import android.view.Window
import android.view.WindowManager
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.AnimatedVisibilityScope
import androidx.compose.animation.EnterExitState
import androidx.compose.animation.core.MutableTransitionState
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.scaleIn
import androidx.compose.animation.scaleOut
import androidx.compose.animation.slideIn
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.gestures.awaitEachGesture
import androidx.compose.foundation.gestures.awaitFirstDown
import androidx.compose.foundation.gestures.detectTapGestures
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.ime
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberUpdatedState
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.graphics.CompositingStrategy
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.TransformOrigin
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.input.pointer.PointerEventPass
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.platform.LocalView
import androidx.compose.ui.platform.LocalWindowInfo
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.IntRect
import androidx.compose.ui.unit.IntSize
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.dp
import androidx.compose.ui.window.Dialog as WindowDialog
import androidx.compose.ui.window.DialogProperties
import androidx.compose.ui.window.DialogWindowProvider
import androidx.compose.ui.window.Popup
import androidx.compose.ui.window.PopupPositionProvider
import androidx.compose.ui.window.PopupProperties
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.X
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Shadow
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.Typography
import com.esuiss.ui.theme.shadow
import kotlin.math.max
import kotlin.math.min

enum class PopupSide { Top, Bottom, Left, Right }

enum class PopupAlign { Start, Center, End }

internal val PopupInset = 16.dp

internal val PopupMargin = 8.dp

@Stable
internal class PopupPlacement {
    var anchorWidth by mutableIntStateOf(0)
}

internal class AnchoredPositionProvider(
    private val side: PopupSide,
    private val align: PopupAlign,
    private val sideOffset: Int,
    private val alignOffset: Int,
    private val inset: Int,
    private val margin: Int,
    private val bottomLimit: Int,
    private val point: IntOffset?,
    private val placement: PopupPlacement,
) : PopupPositionProvider {
    override fun calculatePosition(
        anchorBounds: IntRect,
        windowSize: IntSize,
        layoutDirection: LayoutDirection,
        popupContentSize: IntSize,
    ): IntOffset {
        val anchor = if (point != null) {
            val x = anchorBounds.left + point.x
            val y = anchorBounds.top + point.y
            IntRect(x, y, x, y)
        } else {
            anchorBounds
        }
        val width = (popupContentSize.width - inset * 2).coerceAtLeast(0)
        val height = (popupContentSize.height - inset * 2).coerceAtLeast(0)
        val left = margin
        val top = margin
        val right = windowSize.width - margin
        val bottom = min(windowSize.height, bottomLimit) - margin

        fun space(candidate: PopupSide): Int = when (candidate) {
            PopupSide.Bottom -> bottom - anchor.bottom - sideOffset
            PopupSide.Top -> anchor.top - sideOffset - top
            PopupSide.Right -> right - anchor.right - sideOffset
            PopupSide.Left -> anchor.left - sideOffset - left
        }

        val opposite = when (side) {
            PopupSide.Bottom -> PopupSide.Top
            PopupSide.Top -> PopupSide.Bottom
            PopupSide.Left -> PopupSide.Right
            PopupSide.Right -> PopupSide.Left
        }
        val vertical = side == PopupSide.Top || side == PopupSide.Bottom
        val needed = if (vertical) height else width
        val resolved = if (space(side) >= needed || space(side) >= space(opposite)) side else opposite
        val rtl = layoutDirection == LayoutDirection.Rtl

        var x: Int
        var y: Int
        if (vertical) {
            x = when (align) {
                PopupAlign.Start -> if (rtl) anchor.right - width else anchor.left
                PopupAlign.Center -> anchor.left + (anchor.width - width) / 2
                PopupAlign.End -> if (rtl) anchor.left else anchor.right - width
            } + if (rtl) -alignOffset else alignOffset
            y = if (resolved == PopupSide.Bottom) anchor.bottom + sideOffset else anchor.top - sideOffset - height
        } else {
            y = when (align) {
                PopupAlign.Start -> anchor.top
                PopupAlign.Center -> anchor.top + (anchor.height - height) / 2
                PopupAlign.End -> anchor.bottom - height
            } + alignOffset
            x = if (resolved == PopupSide.Right) anchor.right + sideOffset else anchor.left - sideOffset - width
        }
        x = x.coerceIn(left, max(left, right - width))
        y = y.coerceIn(top, max(top, bottom - height))
        placement.anchorWidth = anchorBounds.width
        return IntOffset(x - inset, y - inset)
    }
}

private fun transformOrigin(side: PopupSide): TransformOrigin = when (side) {
    PopupSide.Bottom -> TransformOrigin(0.5f, 0f)
    PopupSide.Top -> TransformOrigin(0.5f, 1f)
    PopupSide.Left -> TransformOrigin(1f, 0.5f)
    PopupSide.Right -> TransformOrigin(0f, 0.5f)
}

@Composable
internal fun AnchoredPopup(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    side: PopupSide = PopupSide.Bottom,
    align: PopupAlign = PopupAlign.Center,
    sideOffset: Dp = 4.dp,
    alignOffset: Dp = 0.dp,
    focusable: Boolean = true,
    point: IntOffset? = null,
    enterMillis: Int = 150,
    exitMillis: Int = 100,
    content: @Composable (PopupPlacement) -> Unit,
) {
    val transition = remember { MutableTransitionState(false) }
    transition.targetState = expanded
    if (!transition.currentState && !transition.targetState) return

    val density = LocalDensity.current
    val imeBottom = WindowInsets.ime.getBottom(density)
    val containerHeight = LocalWindowInfo.current.containerSize.height
    val bottomLimit = if (containerHeight > 0) containerHeight - imeBottom else Int.MAX_VALUE
    val placement = remember { PopupPlacement() }
    val provider = remember(side, align, sideOffset, alignOffset, point, bottomLimit, density) {
        with(density) {
            AnchoredPositionProvider(
                side = side,
                align = align,
                sideOffset = sideOffset.roundToPx(),
                alignOffset = alignOffset.roundToPx(),
                inset = PopupInset.roundToPx(),
                margin = PopupMargin.roundToPx(),
                bottomLimit = bottomLimit,
                point = point,
                placement = placement,
            )
        }
    }
    val currentExpanded by rememberUpdatedState(expanded)
    val dismiss by rememberUpdatedState(onDismissRequest)
    val properties = PopupProperties(
        focusable = focusable,
        dismissOnBackPress = true,
        dismissOnClickOutside = true,
    )
    val slide = with(density) { 8.dp.roundToPx() }
    val origin = transformOrigin(side)
    Popup(
        popupPositionProvider = provider,
        onDismissRequest = { if (currentExpanded) dismiss() },
        properties = properties,
    ) {
        Box(
            modifier = Modifier
                .pointerInput(Unit) {
                    val insetPx = PopupInset.toPx()
                    detectTapGestures { position ->
                        val inside = position.x >= insetPx && position.y >= insetPx &&
                            position.x <= size.width - insetPx && position.y <= size.height - insetPx
                        if (!inside && currentExpanded) dismiss()
                    }
                }
                .padding(PopupInset),
        ) {
            AnimatedVisibility(
                visibleState = transition,
                enter = scaleIn(tween(enterMillis), initialScale = 0.95f, transformOrigin = origin) +
                    slideIn(tween(enterMillis)) {
                        when (side) {
                            PopupSide.Bottom -> IntOffset(0, -slide)
                            PopupSide.Top -> IntOffset(0, slide)
                            PopupSide.Left -> IntOffset(slide, 0)
                            PopupSide.Right -> IntOffset(-slide, 0)
                        }
                    },
                exit = scaleOut(tween(exitMillis), targetScale = 0.95f, transformOrigin = origin),
            ) {
                Box(fadeWithShadow(enterMillis, exitMillis)) {
                    CompositionLocalProvider(LocalButtonGroup provides null) {
                        content(placement)
                    }
                }
            }
        }
    }
}

@Composable
internal fun ModalWindow(
    visible: Boolean,
    onDismissRequest: () -> Unit,
    dismissOnBackPress: Boolean,
    paneTitle: String?,
    content: @Composable () -> Unit,
) {
    if (!visible) return
    WindowDialog(
        onDismissRequest = onDismissRequest,
        properties = DialogProperties(
            dismissOnBackPress = dismissOnBackPress,
            dismissOnClickOutside = false,
            usePlatformDefaultWidth = false,
            decorFitsSystemWindows = false,
            windowTitle = paneTitle.orEmpty(),
        ),
    ) {
        val window = (LocalView.current.parent as? DialogWindowProvider)?.window
        SideEffect {
            window?.apply {
                setDimAmount(0f)
                clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
                setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT)
                val params = attributes
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                    params.fitInsetsTypes = 0
                    params.fitInsetsSides = 0
                    params.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS
                } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                    params.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
                }
                attributes = params
                addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
                clearSystemBarColors()
            }
        }
        CompositionLocalProvider(LocalButtonGroup provides null, content = content)
    }
}

@Suppress("DEPRECATION")
private fun Window.clearSystemBarColors() {
    statusBarColor = android.graphics.Color.TRANSPARENT
    navigationBarColor = android.graphics.Color.TRANSPARENT
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        isStatusBarContrastEnforced = false
        isNavigationBarContrastEnforced = false
    }
}

@Composable
internal fun AnimatedVisibilityScope.fadeWithShadow(enterMillis: Int, exitMillis: Int): Modifier {
    val alpha by transition.animateFloat(
        transitionSpec = { tween(if (targetState == EnterExitState.Visible) enterMillis else exitMillis) },
        label = "alpha",
    ) { if (it == EnterExitState.Visible) 1f else 0f }
    return Modifier.graphicsLayer {
        this.alpha = alpha
        compositingStrategy = CompositingStrategy.ModulateAlpha
    }
}

@Composable
internal fun Scrim(
    transition: MutableTransitionState<Boolean>,
    enterMillis: Int,
    exitMillis: Int,
    onClick: (() -> Unit)?,
) {
    val color = EsuissTheme.colors.scrim
    val click by rememberUpdatedState(onClick)
    AnimatedVisibility(
        visibleState = transition,
        enter = fadeIn(tween(enterMillis)),
        exit = fadeOut(tween(exitMillis)),
    ) {
        Box(
            modifier = Modifier
                .fillMaxSize()
                .background(color)
                .pointerInput(Unit) { detectTapGestures { click?.invoke() } },
        )
    }
}

@Stable
internal class PaneTitleState {
    var value by mutableStateOf<String?>(null)
}

internal val LocalPaneTitle = staticCompositionLocalOf<PaneTitleState?> { null }

@Composable
internal fun RegisterPaneTitle(text: String) {
    val state = LocalPaneTitle.current
    SideEffect { state?.value = text }
}

internal fun Modifier.raisedSurface(colors: Colors, shape: Shape, shadow: Shadow = Shadows.lg): Modifier =
    this
        .shadow(shadow, shape)
        .clip(shape)
        .background(colors.surfaceRaised, shape)
        .border(1.dp, colors.label.copy(alpha = if (colors.isDark) 0.1f else 0.05f), shape)

internal fun titleStyle(colors: Colors, style: TextStyle = Typography.base, centered: Boolean = false): TextStyle =
    style.copy(
        color = colors.label,
        fontWeight = FontWeight.SemiBold,
        textAlign = if (centered) TextAlign.Center else TextAlign.Unspecified,
    )

internal fun descriptionStyle(colors: Colors, centered: Boolean = false): TextStyle =
    Typography.sm.copy(
        color = colors.labelSecondary,
        textAlign = if (centered) TextAlign.Center else TextAlign.Unspecified,
    )

@Composable
internal fun OverlayTitle(text: String, modifier: Modifier, style: TextStyle) {
    RegisterPaneTitle(text)
    BasicText(text, modifier = modifier.semantics { heading() }, style = style)
}

@Composable
internal fun OverlayCloseButton(
    onClick: () -> Unit,
    label: String?,
    modifier: Modifier = Modifier,
) {
    val colors = EsuissTheme.colors
    if (label != null) {
        Button(onClick = onClick, modifier = modifier, variant = ButtonVariant.Plain, size = ButtonSize.Sm) {
            BasicText(label, style = Typography.base.copy(color = LocalContentColor.current), maxLines = 1)
        }
        return
    }
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Box(
        modifier = modifier
            .size(44.dp)
            .clip(CircleShape)
            .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = onClick)
            .semantics { contentDescription = "Close" },
        contentAlignment = Alignment.Center,
    ) {
        Box(
            modifier = Modifier
                .size(32.dp)
                .background(if (pressed) colors.separator else colors.surfaceTertiary, CircleShape),
            contentAlignment = Alignment.Center,
        ) {
            Icon(PhosphorIcons.Regular.X, contentDescription = null, size = 16.dp, tint = colors.label)
        }
    }
}

@Composable
internal fun rememberLongPressModifier(enabled: Boolean, onLongPress: (Offset) -> Unit): Modifier {
    val callback by rememberUpdatedState(onLongPress)
    if (!enabled) return Modifier
    return Modifier.pointerInput(Unit) {
        awaitEachGesture {
            val down = awaitFirstDown(requireUnconsumed = false, pass = PointerEventPass.Initial)
            val released = withTimeoutOrNull(viewConfiguration.longPressTimeoutMillis) {
                while (true) {
                    val event = awaitPointerEvent(PointerEventPass.Initial)
                    val change = event.changes.firstOrNull { it.id == down.id }
                    if (change == null || !change.pressed) break
                    if ((change.position - down.position).getDistance() > viewConfiguration.touchSlop) break
                }
                true
            }
            if (released == null) {
                callback(down.position)
                while (true) {
                    val event = awaitPointerEvent(PointerEventPass.Initial)
                    event.changes.forEach { it.consume() }
                    if (event.changes.none { it.pressed }) break
                }
            }
        }
    }
}
```

```kt title="kotlin/components/Screen.kt"
package com.esuiss.ui.components

import android.app.Activity
import android.content.Context
import android.content.ContextWrapper
import android.os.Build
import android.view.View
import android.view.Window
import android.view.WindowInsetsController
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxScope
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ExperimentalLayoutApi
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.displayCutout
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.statusBarsIgnoringVisibility
import androidx.compose.foundation.layout.systemBars
import androidx.compose.foundation.layout.union
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.Stable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalView
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Stable
internal class KeyboardAccessoryInset {
    var height by mutableIntStateOf(0)
}

internal val LocalKeyboardAccessory = staticCompositionLocalOf<KeyboardAccessoryInset?> { null }

enum class ScreenEdge { Top, Bottom, Left, Right }

enum class ScreenVariant { Default, Secondary }

private val AllScreenEdges = setOf(ScreenEdge.Top, ScreenEdge.Bottom, ScreenEdge.Left, ScreenEdge.Right)

private fun Set<ScreenEdge>.sides(): WindowInsetsSides? = map {
    when (it) {
        ScreenEdge.Top -> WindowInsetsSides.Top
        ScreenEdge.Bottom -> WindowInsetsSides.Bottom
        ScreenEdge.Left -> WindowInsetsSides.Left
        ScreenEdge.Right -> WindowInsetsSides.Right
    }
}.reduceOrNull { sides, side -> sides + side }

internal tailrec fun Context.findActivity(): Activity? = when (this) {
    is Activity -> this
    is ContextWrapper -> baseContext.findActivity()
    else -> null
}

@Suppress("DEPRECATION")
private fun Window.applyLightBars(light: Boolean) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
        val mask = WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS or WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS
        insetsController?.setSystemBarsAppearance(if (light) mask else 0, mask)
        return
    }
    var flags = decorView.systemUiVisibility
    flags = if (light) flags or View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR else flags and View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR.inv()
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        flags = if (light) flags or View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR else flags and View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR.inv()
    }
    if (decorView.systemUiVisibility != flags) decorView.systemUiVisibility = flags
}

@OptIn(ExperimentalLayoutApi::class)
@Composable
fun Screen(
    modifier: Modifier = Modifier,
    edges: Set<ScreenEdge> = AllScreenEdges,
    variant: ScreenVariant = ScreenVariant.Default,
    content: @Composable BoxScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val view = LocalView.current
    val light = !colors.isDark
    SideEffect {
        if (!view.isInEditMode) view.context.findActivity()?.window?.applyLightBars(light)
    }
    val sides = edges.sides()
    val accessory = remember { KeyboardAccessoryInset() }
    val fill = when (variant) {
        ScreenVariant.Default -> colors.surface
        ScreenVariant.Secondary -> colors.surfaceSecondary
    }
    Box(
        modifier = modifier
            .fillMaxSize()
            .background(fill)
            .then(
                if (sides != null) {
                    Modifier.windowInsetsPadding(WindowInsets.systemBars.union(WindowInsets.displayCutout).union(WindowInsets.statusBarsIgnoringVisibility).only(sides))
                } else {
                    Modifier
                },
            ),
    ) {
        CompositionLocalProvider(
            LocalKeyboardAccessory provides accessory,
            LocalContentStyle provides Typography.base.copy(color = colors.label),
            LocalContentColor provides colors.label,
        ) {
            content()
        }
    }
}

@Composable
fun ScreenContent(
    modifier: Modifier = Modifier,
    scrollable: Boolean = false,
    contentPadding: PaddingValues = PaddingValues(16.dp),
    verticalArrangement: Arrangement.Vertical = Arrangement.spacedBy(16.dp),
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(
        modifier = modifier
            .fillMaxWidth()
            .then(if (scrollable) Modifier.verticalScroll(rememberScrollState()) else Modifier)
            .padding(contentPadding),
        verticalArrangement = verticalArrangement,
        content = content,
    )
}
```

```kt title="kotlin/components/Select.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.IntrinsicSize
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.snapshots.SnapshotStateMap
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.semantics.stateDescription
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.max
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.CaretUpDown
import com.adamglin.phosphoricons.regular.Check
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class SelectSize(val height: Dp, val radius: Dp) {
    Default(44.dp, Radius.lg),
    Sm(36.dp, Radius.md),
}

@Immutable
class SelectOption(val value: String, val label: String, val enabled: Boolean = true)

@Immutable
private data class SelectContext(val value: String?, val onSelect: (String) -> Unit)

private val LocalSelect = staticCompositionLocalOf { SelectContext(null) {} }

private val LocalSelectLabels = staticCompositionLocalOf<SnapshotStateMap<String, String>?> { null }

internal fun controlBackground(colors: Colors, invalid: Boolean, enabled: Boolean): Color = when {
    !enabled -> colors.controlDisabled
    invalid -> colors.danger.copy(alpha = if (colors.isDark) 0.1f else 0.05f)
    else -> colors.control
}

@Composable
fun Select(
    value: String?,
    onValueChange: (String) -> Unit,
    options: List<SelectOption>,
    modifier: Modifier = Modifier,
    placeholder: String = "",
    size: SelectSize = SelectSize.Default,
    invalid: Boolean? = null,
    enabled: Boolean = true,
    side: PopupSide = PopupSide.Bottom,
    align: PopupAlign = PopupAlign.Center,
    sideOffset: Dp = 4.dp,
) {
    Select(
        value = value,
        onValueChange = onValueChange,
        displayValue = options.firstOrNull { it.value == value }?.label,
        modifier = modifier,
        placeholder = placeholder,
        size = size,
        invalid = invalid,
        enabled = enabled,
        side = side,
        align = align,
        sideOffset = sideOffset,
    ) {
        SelectGroup {
            options.forEach { SelectItem(it.value, it.label, enabled = it.enabled) }
        }
    }
}

@Composable
fun Select(
    value: String?,
    onValueChange: (String) -> Unit,
    displayValue: String?,
    modifier: Modifier = Modifier,
    placeholder: String = "",
    size: SelectSize = SelectSize.Default,
    invalid: Boolean? = null,
    enabled: Boolean = true,
    side: PopupSide = PopupSide.Bottom,
    align: PopupAlign = PopupAlign.Center,
    sideOffset: Dp = 4.dp,
    content: @Composable ColumnScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val field = LocalFieldState.current
    val isInvalid = invalid ?: field.invalid
    val isEnabled = enabled && field.enabled
    var expanded by remember { mutableStateOf(false) }
    val item = rememberButtonGroupItem(LocalButtonGroup.current, RoundedCornerShape(size.radius))
    val shape = item.shape
    val labels = remember { mutableStateMapOf<String, String>() }
    val text = displayValue ?: value?.let { labels[it] ?: it }
    val foreground = when {
        !isEnabled -> colors.labelQuaternary
        text == null -> colors.labelSecondary
        else -> colors.label
    }
    Box(modifier = modifier.then(item.modifier), propagateMinConstraints = true) {
        if (displayValue == null) {
            Layout(
                content = {
                    CompositionLocalProvider(LocalSelectLabels provides labels) { Column(content = content) }
                },
            ) { _, _ -> layout(0, 0) {} }
        }
        Row(
            modifier = Modifier
                .width(IntrinsicSize.Max)
                .height(size.height)
                .clip(shape)
                .background(controlBackground(colors, isInvalid, isEnabled), shape)
                .border(1.dp, if (isInvalid) colors.danger else Color.Transparent, shape)
                .semantics { stateDescription = if (expanded) "Expanded" else "Collapsed" }
                .clickable(
                    interactionSource = remember { MutableInteractionSource() },
                    indication = null,
                    enabled = isEnabled,
                    role = Role.DropdownList,
                    onClick = { expanded = !expanded },
                )
                .padding(horizontal = 12.dp),
            horizontalArrangement = Arrangement.spacedBy(6.dp),
            verticalAlignment = Alignment.CenterVertically,
        ) {
            BasicText(
                text ?: placeholder,
                modifier = Modifier.weight(1f),
                style = Typography.base.copy(color = foreground),
                maxLines = 1,
                overflow = TextOverflow.Ellipsis,
            )
            Icon(PhosphorIcons.Regular.CaretUpDown, contentDescription = null, size = 16.dp, tint = colors.labelSecondary)
        }
        AnchoredPopup(
            expanded = expanded,
            onDismissRequest = { expanded = false },
            side = side,
            align = align,
            sideOffset = sideOffset,
        ) { placement ->
            val anchorWidth = with(LocalDensity.current) { placement.anchorWidth.toDp() }
            CompositionLocalProvider(
                LocalSelect provides SelectContext(value) {
                    onValueChange(it)
                    expanded = false
                },
                LocalContentStyle provides Typography.base.copy(color = colors.label),
                LocalContentColor provides colors.label,
            ) {
                Column(
                    modifier = Modifier
                        .width(max(anchorWidth, 144.dp))
                        .raisedSurface(colors, RoundedCornerShape(Radius.xl))
                        .verticalScroll(rememberScrollState()),
                    content = content,
                )
            }
        }
    }
}

@Composable
fun SelectGroup(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(modifier = modifier.fillMaxWidth().padding(6.dp), content = content)
}

@Composable
fun SelectLabel(text: String, modifier: Modifier = Modifier) {
    BasicText(
        text,
        modifier = modifier
            .fillMaxWidth()
            .semantics { heading() }
            .padding(horizontal = 12.dp, vertical = 10.dp),
        style = Typography.xs.copy(color = EsuissTheme.colors.labelSecondary, fontWeight = FontWeight.SemiBold),
    )
}

@Composable
fun SelectItem(
    value: String,
    text: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    val labels = LocalSelectLabels.current
    if (labels != null) {
        DisposableEffect(labels, value, text) {
            labels[value] = text
            onDispose { labels.remove(value) }
        }
        return
    }
    val colors = EsuissTheme.colors
    val select = LocalSelect.current
    val selected = select.value == value
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val shape = RoundedCornerShape(Radius.md)
    Box(
        modifier = modifier
            .fillMaxWidth()
            .heightIn(min = 44.dp)
            .clip(shape)
            .background(if (pressed && enabled) colors.itemPressed else Color.Transparent, shape)
            .selectable(
                selected = selected,
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                role = Role.RadioButton,
                onClick = { select.onSelect(value) },
            )
            .padding(start = 12.dp, end = 8.dp),
        contentAlignment = Alignment.CenterStart,
    ) {
        BasicText(
            text,
            modifier = Modifier.padding(end = 24.dp, top = 8.dp, bottom = 8.dp),
            style = Typography.base.copy(color = if (enabled) colors.label else colors.labelQuaternary),
            maxLines = 1,
            overflow = TextOverflow.Ellipsis,
        )
        if (selected) {
            Icon(
                PhosphorIcons.Regular.Check,
                contentDescription = null,
                modifier = Modifier.align(Alignment.CenterEnd),
                size = 16.dp,
                tint = colors.link,
            )
        }
    }
}

@Composable
fun SelectSeparator(modifier: Modifier = Modifier) {
    Box(
        modifier = modifier
            .padding(vertical = 6.dp)
            .fillMaxWidth()
            .height(1.dp)
            .background(EsuissTheme.colors.separator),
    )
}
```

```kt title="kotlin/components/Separator.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.width
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Separator(
    modifier: Modifier = Modifier,
    orientation: Orientation = Orientation.Horizontal,
) {
    val sizing = if (orientation == Orientation.Horizontal) {
        Modifier.fillMaxWidth().height(1.dp)
    } else {
        Modifier.fillMaxHeight().width(1.dp)
    }
    Box(modifier.then(sizing).background(EsuissTheme.colors.separator))
}
```

```kt title="kotlin/components/Switch.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.animateDpAsState
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.selection.toggleable
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.error
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.shadow

enum class SwitchSize(
    internal val width: Dp,
    internal val height: Dp,
    internal val thumbHeight: Dp,
    internal val thumbWidth: Dp,
    internal val pressedThumbWidth: Dp,
    internal val travel: Dp,
    internal val pressedTravel: Dp,
) {
    Default(52.dp, 24.dp, 20.dp, 32.dp, 36.dp, 16.dp, 12.dp),
    Sm(44.dp, 20.dp, 16.dp, 26.dp, 30.dp, 14.dp, 10.dp),
}

@Composable
fun Switch(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    size: SwitchSize = SwitchSize.Default,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val pressed by source.collectIsPressedAsState()
    val squeezed = pressed && enabled && onCheckedChange != null
    val spec = tween<Dp>(200, easing = FormEasing)
    val thumbWidth by animateDpAsState(if (squeezed) size.pressedThumbWidth else size.thumbWidth, spec, label = "thumb")
    val travel by animateDpAsState(
        when {
            !checked -> 0.dp
            squeezed -> size.pressedTravel
            else -> size.travel
        },
        spec,
        label = "travel",
    )
    val track = when {
        checked && !enabled -> colors.accentDisabled
        checked -> colors.accent
        !enabled -> colors.controlDisabled
        else -> colors.labelQuaternary
    }
    val border = when {
        invalid && enabled -> colors.danger
        checked && enabled -> colors.accent
        else -> Color.Transparent
    }
    val toggle = if (onCheckedChange != null) {
        Modifier
            .toggleable(
                value = checked,
                interactionSource = source,
                indication = null,
                enabled = enabled,
                role = Role.Switch,
                onValueChange = {
                    haptics.toggle(it)
                    onCheckedChange(it)
                },
            )
            .formTouchTarget()
    } else {
        Modifier
    }
    Box(
        modifier = modifier
            .then(toggle)
            .then(if (invalid) Modifier.semantics { error("Invalid") } else Modifier)
            .size(size.width, size.height)
            .background(track, CircleShape)
            .border(2.dp, border, CircleShape)
            .padding(2.dp),
        contentAlignment = Alignment.CenterStart,
    ) {
        Box(
            Modifier
                .offset(x = travel)
                .size(thumbWidth, size.thumbHeight)
                .shadow(FormShadowSm, CircleShape)
                .background(if (colors.isDark) colors.label else colors.surface, CircleShape),
        )
    }
}
```

```kt title="kotlin/components/TabBar.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.Spring
import androidx.compose.animation.core.spring
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.exclude
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.onConsumedWindowInsetsChanged
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.widthIn
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.selection.selectableGroup
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.Stable
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.geometry.CornerRadius
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.layout.positionInParent
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.coerceAtLeast
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography
import kotlinx.coroutines.launch

@Immutable
private class TabBarIndicator(val x: Float, val y: Float, val width: Float, val height: Float)

@Stable
private class TabBarLayout {
    val items = mutableStateMapOf<String, TabBarIndicator>()
}

@Immutable
private class TabBarContext(
    val value: String,
    val onValueChange: (String) -> Unit,
    val layout: TabBarLayout,
)

private val LocalTabBar = staticCompositionLocalOf<TabBarContext?> { null }

@Composable
fun TabBar(
    value: String,
    onValueChange: (String) -> Unit,
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val density = LocalDensity.current
    var consumed by remember { mutableStateOf(WindowInsets(0, 0, 0, 0)) }
    val remaining = with(density) { WindowInsets.safeDrawing.exclude(consumed).getBottom(density).toDp() }
    val bottom = (remaining - 8.dp).coerceAtLeast(12.dp)
    val layout = remember { TabBarLayout() }
    val x = remember { Animatable(0f) }
    val width = remember { Animatable(0f) }
    var placed by remember { mutableStateOf(false) }
    val target = layout.items[value]
    LaunchedEffect(target?.x, target?.width) {
        if (target == null) return@LaunchedEffect
        if (!placed) {
            x.snapTo(target.x)
            width.snapTo(target.width)
            placed = true
            return@LaunchedEffect
        }
        val motion = spring<Float>(dampingRatio = 0.85f, stiffness = Spring.StiffnessMediumLow)
        launch { x.animateTo(target.x, motion) }
        launch { width.animateTo(target.width, motion) }
    }
    CompositionLocalProvider(LocalTabBar provides TabBarContext(value, onValueChange, layout)) {
        Column(
            modifier = modifier
                .fillMaxWidth()
                .onConsumedWindowInsetsChanged { consumed = it }
                .windowInsetsPadding(WindowInsets.safeDrawing.only(WindowInsetsSides.Horizontal))
                .padding(start = 16.dp, end = 16.dp, top = 8.dp, bottom = bottom),
        ) {
            Row(
                modifier = Modifier
                    .fillMaxWidth()
                    .raisedSurface(colors, CircleShape)
                    .padding(4.dp)
                    .drawBehind {
                        val current = layout.items[value]
                        if (placed && current != null) {
                            drawRoundRect(
                                color = colors.control,
                                topLeft = Offset(x.value, current.y),
                                size = Size(width.value, current.height),
                                cornerRadius = CornerRadius(current.height / 2f),
                            )
                        }
                    }
                    .selectableGroup(),
                verticalAlignment = Alignment.CenterVertically,
                content = content,
            )
        }
    }
}

@Composable
fun RowScope.TabBarItem(
    value: String,
    label: String,
    icon: ImageVector,
    modifier: Modifier = Modifier,
    selectedIcon: ImageVector? = null,
    badge: String? = null,
    enabled: Boolean = true,
) {
    val context = checkNotNull(LocalTabBar.current) { "TabBarItem must be used within a TabBar" }
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    val selected = context.value == value
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val foreground = when {
        !enabled -> colors.labelQuaternary
        selected -> colors.accent
        else -> colors.labelSecondary
    }
    DisposableEffect(context.layout, value) {
        onDispose { context.layout.items.remove(value) }
    }
    Column(
        modifier = modifier
            .weight(1f)
            .onPlaced { coordinates ->
                val position = coordinates.positionInParent()
                val next = TabBarIndicator(position.x, position.y, coordinates.size.width.toFloat(), coordinates.size.height.toFloat())
                val previous = context.layout.items[value]
                if (previous == null || previous.x != next.x || previous.y != next.y || previous.width != next.width || previous.height != next.height) {
                    context.layout.items[value] = next
                }
            }
            .clip(CircleShape)
            .then(if (pressed) Modifier.background(colors.itemPressed, CircleShape) else Modifier)
            .selectable(
                selected = selected,
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                role = Role.Tab,
            ) {
                if (!selected) haptics.selection()
                context.onValueChange(value)
            }
            .padding(vertical = 6.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.spacedBy(2.dp, Alignment.CenterVertically),
    ) {
        Box {
            Icon(if (selected && selectedIcon != null) selectedIcon else icon, contentDescription = null, size = 24.dp, tint = foreground)
            if (badge != null) TabBarBadge(badge, Modifier.align(Alignment.TopStart).offset(x = if (badge.isEmpty()) 18.dp else 14.dp, y = (-4).dp))
        }
        BasicText(
            label,
            style = Typography.xs3.copy(color = foreground, fontWeight = FontWeight.Medium, textAlign = TextAlign.Center),
            maxLines = 1,
            overflow = TextOverflow.Ellipsis,
        )
    }
}

@Composable
private fun TabBarBadge(text: String, modifier: Modifier) {
    val colors = EsuissTheme.colors
    if (text.isEmpty()) {
        Box(
            modifier = modifier
                .size(10.dp)
                .clip(CircleShape)
                .background(colors.danger, CircleShape)
                .border(2.dp, colors.surfaceRaised, CircleShape),
        )
        return
    }
    Box(
        modifier = modifier
            .heightIn(min = 18.dp)
            .widthIn(min = 18.dp)
            .clip(CircleShape)
            .background(colors.danger, CircleShape)
            .border(2.dp, colors.surfaceRaised, CircleShape)
            .padding(horizontal = 5.dp),
        contentAlignment = Alignment.Center,
    ) {
        BasicText(
            text,
            style = Typography.xs3.copy(color = colors.onAccent, fontWeight = FontWeight.SemiBold, textAlign = TextAlign.Center),
            maxLines = 1,
        )
    }
}
```

```kt title="kotlin/components/Toggle.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.defaultMinSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.selection.toggleable
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ToggleVariant { Default, Outline }

enum class ToggleSize(internal val height: Dp, internal val horizontalPadding: Dp) {
    Default(36.dp, 12.dp),
    Sm(32.dp, 12.dp),
    Lg(40.dp, 16.dp),
}

@Composable
fun Toggle(
    pressed: Boolean,
    onPressedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
) {
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val touching by source.collectIsPressedAsState()
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    ToggleSurface(
        modifier = modifier.toggleSemantics(pressed, enabled, source, multiple = true) {
            haptics.toggle(!pressed)
            onPressedChange(!pressed)
        },
        size = size,
        shape = RoundedCornerShape(Radius.lg),
        outlined = variant == ToggleVariant.Outline,
        background = toggleBackground(colors, pressed, enabled, touching),
        foreground = toggleForeground(colors, pressed, enabled),
        scaled = touching && enabled,
        content = content,
    )
}

@Composable
fun Toggle(
    text: String,
    pressed: Boolean,
    onPressedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    enabled: Boolean = true,
) {
    Toggle(pressed, onPressedChange, modifier, variant, size, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}

internal fun toggleBackground(colors: Colors, on: Boolean, enabled: Boolean, touching: Boolean): Color = when {
    !enabled -> if (on) colors.controlDisabled else Color.Transparent
    on -> if (touching) colors.itemPressed else colors.itemSelected
    touching -> colors.itemPressed
    else -> Color.Transparent
}

internal fun toggleForeground(colors: Colors, on: Boolean, enabled: Boolean): Color = when {
    !enabled -> colors.labelQuaternary
    on -> colors.link
    else -> colors.label
}

@Composable
internal fun ToggleSurface(
    modifier: Modifier,
    size: ToggleSize,
    shape: Shape,
    outlined: Boolean,
    background: Color,
    foreground: Color,
    scaled: Boolean,
    horizontalPadding: Dp = size.horizontalPadding,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val scale by animateFloatAsState(if (scaled) 0.96f else 1f, tween(150), label = "toggle")
    Row(
        modifier = modifier
            .graphicsLayer {
                scaleX = scale
                scaleY = scale
            }
            .height(size.height)
            .defaultMinSize(minWidth = size.height)
            .clip(shape)
            .background(background, shape)
            .then(if (outlined) Modifier.border(1.dp, colors.separator, shape) else Modifier)
            .padding(horizontal = horizontalPadding),
        horizontalArrangement = Arrangement.spacedBy(4.dp, Alignment.CenterHorizontally),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.sm.copy(color = foreground),
            LocalContentColor provides foreground,
            LocalIconSize provides 16.dp,
        ) {
            content()
        }
    }
}

internal fun Modifier.toggleSemantics(
    on: Boolean,
    enabled: Boolean,
    source: MutableInteractionSource,
    multiple: Boolean,
    onClick: () -> Unit,
): Modifier = if (multiple) {
    toggleable(
        value = on,
        interactionSource = source,
        indication = null,
        enabled = enabled,
        role = Role.Checkbox,
        onValueChange = { onClick() },
    )
} else {
    selectable(
        selected = on,
        interactionSource = source,
        indication = null,
        enabled = enabled,
        role = Role.RadioButton,
        onClick = onClick,
    )
}
```

```kt title="kotlin/components/ToggleGroup.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.IntrinsicSize
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.selection.selectableGroup
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.geometry.Rect
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.layout.boundsInParent
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.shadow
import kotlin.math.roundToInt
import kotlinx.coroutines.launch

private val IndicatorEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

private class ToggleGroupIndicator {
    val bounds = mutableStateMapOf<String, Rect>()
    val active = mutableStateMapOf<String, Boolean>()
}

private class ToggleGroupState(
    val isSelected: (String) -> Boolean,
    val toggle: (String) -> Unit,
    val variant: ToggleVariant,
    val size: ToggleSize,
    val spacing: Int,
    val orientation: Orientation,
    val enabled: Boolean,
    val multiple: Boolean,
    val selected: String? = null,
    val indicator: ToggleGroupIndicator? = null,
) {
    val segmented: Boolean get() = spacing == 0 && variant == ToggleVariant.Default
    val attached: Boolean get() = spacing == 0 && variant == ToggleVariant.Outline
}

private val LocalToggleGroupState = staticCompositionLocalOf<ToggleGroupState?> { null }

@Composable
fun ToggleGroup(
    value: String?,
    onValueChange: (String?) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    content: @Composable () -> Unit,
) {
    val indicator = remember { ToggleGroupIndicator() }
    val state = ToggleGroupState(
        isSelected = { it == value },
        toggle = { onValueChange(if (it == value) null else it) },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
        multiple = false,
        selected = value,
        indicator = if (spacing == 0 && variant == ToggleVariant.Default) indicator else null,
    )
    ToggleGroupLayout(state, modifier, content)
}

@Composable
fun ToggleGroup(
    values: Set<String>,
    onValuesChange: (Set<String>) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    content: @Composable () -> Unit,
) {
    val state = ToggleGroupState(
        isSelected = { it in values },
        toggle = { onValuesChange(if (it in values) values - it else values + it) },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
        multiple = true,
    )
    ToggleGroupLayout(state, modifier, content)
}

@Composable
private fun ToggleGroupLayout(
    state: ToggleGroupState,
    modifier: Modifier,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    val vertical = state.orientation == Orientation.Vertical
    val base = modifier.then(if (state.multiple) Modifier else Modifier.selectableGroup())
    CompositionLocalProvider(LocalToggleGroupState provides state) {
        if (state.attached) {
            val shape = RoundedCornerShape(if (vertical) Radius.xl else Radius.lg)
            FormDividedStack(
                orientation = state.orientation,
                dividerColor = colors.separator,
                modifier = base.clip(shape).border(1.dp, colors.separator, shape),
                content = content,
            )
        } else {
            val gap = if (state.segmented) 4.dp else (state.spacing * 4).dp
            val container = if (state.segmented) {
                val shape = RoundedCornerShape(Radius.xl)
                base.clip(shape).background(colors.control, shape).padding(4.dp)
            } else {
                base
            }
            val indicator = state.indicator
            if (indicator != null) {
                Box(modifier = if (vertical) container.width(IntrinsicSize.Max) else container) {
                    if (state.enabled) ToggleGroupIndicatorLayer(indicator, state.selected)
                    ToggleGroupStack(vertical, gap, if (vertical) Modifier.fillMaxWidth() else Modifier, content)
                }
            } else {
                ToggleGroupStack(vertical, gap, if (vertical) container.width(IntrinsicSize.Max) else container, content)
            }
        }
    }
}

@Composable
private fun ToggleGroupStack(
    vertical: Boolean,
    gap: Dp,
    modifier: Modifier,
    content: @Composable () -> Unit,
) {
    if (vertical) {
        Column(
            modifier = modifier,
            verticalArrangement = Arrangement.spacedBy(gap),
        ) {
            content()
        }
    } else {
        Row(
            modifier = modifier,
            horizontalArrangement = Arrangement.spacedBy(gap),
            verticalAlignment = Alignment.CenterVertically,
        ) {
            content()
        }
    }
}

@Composable
private fun ToggleGroupIndicatorLayer(indicator: ToggleGroupIndicator, selected: String?) {
    val colors = EsuissTheme.colors
    val density = LocalDensity.current
    val reduced = formReducedMotion()
    val target = selected?.takeIf { indicator.active[it] != false }?.let { indicator.bounds[it] } ?: return
    val left = remember { Animatable(target.left) }
    val top = remember { Animatable(target.top) }
    val width = remember { Animatable(target.width) }
    val height = remember { Animatable(target.height) }
    LaunchedEffect(target) {
        if (reduced) {
            left.snapTo(target.left)
            top.snapTo(target.top)
            width.snapTo(target.width)
            height.snapTo(target.height)
        } else {
            val spec = tween<Float>(300, easing = IndicatorEasing)
            launch { left.animateTo(target.left, spec) }
            launch { top.animateTo(target.top, spec) }
            launch { width.animateTo(target.width, spec) }
            launch { height.animateTo(target.height, spec) }
        }
    }
    val shape = RoundedCornerShape(Radius.md)
    Box(
        modifier = Modifier
            .offset { IntOffset(left.value.roundToInt(), top.value.roundToInt()) }
            .size(with(density) { width.value.toDp() }, with(density) { height.value.toDp() })
            .shadow(FormShadowSm, shape)
            .background(if (colors.isDark) colors.labelQuaternary else colors.surfaceRaised, shape),
    )
}

@Composable
fun ToggleGroupItem(
    value: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val group = LocalToggleGroupState.current ?: return
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val touching by source.collectIsPressedAsState()
    val haptics = rememberHaptics()
    val on = group.isSelected(value)
    val active = enabled && group.enabled
    val fill = if (group.orientation == Orientation.Vertical) Modifier.fillMaxWidth() else Modifier
    val semantics = modifier
        .then(fill)
        .toggleSemantics(on, active, source, group.multiple) {
            if (group.multiple) haptics.toggle(!on) else haptics.selection()
            group.toggle(value)
        }
    val indicator = group.indicator
    if (indicator != null) {
        SideEffect { indicator.active[value] = active }
        DisposableEffect(indicator, value) {
            onDispose {
                indicator.bounds.remove(value)
                indicator.active.remove(value)
            }
        }
    }
    val sliding = indicator != null && on && active
    when {
        group.segmented -> {
            val shape = RoundedCornerShape(Radius.md)
            val background = when {
                !on || sliding -> Color.Transparent
                !active -> colors.controlDisabled
                colors.isDark -> colors.labelQuaternary
                else -> colors.surfaceRaised
            }
            val foreground = when {
                !active -> colors.labelQuaternary
                on -> colors.label
                else -> colors.labelSecondary
            }
            val placed = if (indicator != null) {
                semantics.onPlaced { indicator.bounds[value] = it.boundsInParent() }
            } else {
                semantics
            }
            ToggleSurface(
                modifier = placed.then(if (on && active && !sliding) Modifier.shadow(FormShadowSm, shape) else Modifier),
                size = group.size,
                shape = shape,
                outlined = false,
                background = background,
                foreground = foreground,
                scaled = false,
                horizontalPadding = 12.dp,
                content = content,
            )
        }
        else -> ToggleSurface(
            modifier = semantics,
            size = group.size,
            shape = if (group.attached) RectangleShape else RoundedCornerShape(Radius.lg),
            outlined = !group.attached && group.variant == ToggleVariant.Outline,
            background = toggleBackground(colors, on, active, touching),
            foreground = toggleForeground(colors, on, active),
            scaled = touching && active,
            content = content,
        )
    }
}

@Composable
fun ToggleGroupItem(
    text: String,
    value: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    ToggleGroupItem(value, modifier, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}
```

```kt title="kotlin/patterns/Picker.kt"
package com.esuiss.ui.patterns

import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.runtime.Composable
import androidx.compose.runtime.Immutable
import androidx.compose.ui.Modifier
import com.esuiss.ui.components.Select
import com.esuiss.ui.components.SelectGroup
import com.esuiss.ui.components.SelectItem
import com.esuiss.ui.components.SelectLabel
import com.esuiss.ui.components.SelectSeparator
import com.esuiss.ui.components.SelectSize

@Immutable
class PickerItemData(
    val value: String,
    val label: String,
    val enabled: Boolean = true,
)

@Composable
fun Picker(
    value: String?,
    onValueChange: (String) -> Unit,
    modifier: Modifier = Modifier,
    items: List<PickerItemData> = emptyList(),
    placeholder: String = "",
    size: SelectSize = SelectSize.Default,
    enabled: Boolean = true,
    invalid: Boolean? = null,
    content: (@Composable ColumnScope.() -> Unit)? = null,
) {
    Select(
        value = value,
        onValueChange = onValueChange,
        displayValue = items.firstOrNull { it.value == value }?.label,
        modifier = modifier,
        placeholder = placeholder,
        size = size,
        invalid = invalid,
        enabled = enabled,
    ) {
        if (content != null) {
            content()
        } else {
            SelectGroup {
                items.forEach { PickerItem(it.value, it.label, enabled = it.enabled) }
            }
        }
    }
}

@Composable
fun PickerGroup(
    label: String? = null,
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    SelectGroup(modifier) {
        if (label != null) SelectLabel(label)
        content()
    }
}

@Composable
fun PickerItem(
    value: String,
    text: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    SelectItem(value, text, modifier, enabled)
}

@Composable
fun PickerSeparator() {
    SelectSeparator()
}
```

```kt title="kotlin/patterns/SplitView.kt"
package com.esuiss.ui.patterns

import androidx.compose.animation.AnimatedContent
import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.slideInHorizontally
import androidx.compose.animation.slideOutHorizontally
import androidx.compose.animation.togetherWith
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.foundation.verticalScroll
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableFloatStateOf
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.layout.positionInRoot
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.semantics.selected
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Bold
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.bold.CaretLeft
import com.adamglin.phosphoricons.regular.CaretRight
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.LocalContentColor
import com.esuiss.ui.components.LocalContentStyle
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography
import kotlin.math.abs

enum class SplitViewColumn { Sidebar, List, Detail }

private class SplitViewPane(
    val kind: SplitViewColumn,
    val title: String?,
    val modifier: Modifier,
    val content: @Composable ColumnScope.() -> Unit,
)

interface SplitViewScope {
    fun SplitViewSidebar(title: String? = null, modifier: Modifier = Modifier, content: @Composable ColumnScope.() -> Unit)

    fun SplitViewList(title: String? = null, modifier: Modifier = Modifier, content: @Composable ColumnScope.() -> Unit)

    fun SplitViewDetail(title: String? = null, modifier: Modifier = Modifier, content: @Composable ColumnScope.() -> Unit)
}

private class SplitViewScopeImpl : SplitViewScope {
    val panes = mutableListOf<SplitViewPane>()

    override fun SplitViewSidebar(title: String?, modifier: Modifier, content: @Composable ColumnScope.() -> Unit) {
        panes += SplitViewPane(SplitViewColumn.Sidebar, title, modifier, content)
    }

    override fun SplitViewList(title: String?, modifier: Modifier, content: @Composable ColumnScope.() -> Unit) {
        panes += SplitViewPane(SplitViewColumn.List, title, modifier, content)
    }

    override fun SplitViewDetail(title: String?, modifier: Modifier, content: @Composable ColumnScope.() -> Unit) {
        panes += SplitViewPane(SplitViewColumn.Detail, title, modifier, content)
    }
}

private class SplitViewItemEdges {
    val edges = mutableStateMapOf<Any, Pair<Float, Float>>()
}

@Immutable
private class SplitViewContext(
    val compact: Boolean,
    val kind: SplitViewColumn,
    val setColumn: (SplitViewColumn) -> Unit,
    val items: SplitViewItemEdges = SplitViewItemEdges(),
)

private val LocalSplitView = staticCompositionLocalOf<SplitViewContext?> { null }

private fun next(kind: SplitViewColumn): SplitViewColumn = when (kind) {
    SplitViewColumn.Sidebar -> SplitViewColumn.List
    SplitViewColumn.List, SplitViewColumn.Detail -> SplitViewColumn.Detail
}

private fun previous(kind: SplitViewColumn): SplitViewColumn? = when (kind) {
    SplitViewColumn.Sidebar -> null
    SplitViewColumn.List -> SplitViewColumn.Sidebar
    SplitViewColumn.Detail -> SplitViewColumn.List
}

private val WideBreakpoint = 768.dp

@Composable
fun SplitView(
    modifier: Modifier = Modifier,
    column: SplitViewColumn? = null,
    defaultColumn: SplitViewColumn = SplitViewColumn.List,
    onColumnChange: (SplitViewColumn) -> Unit = {},
    content: SplitViewScope.() -> Unit,
) {
    val panes = SplitViewScopeImpl().apply(content).panes.toList()
    var uncontrolled by rememberSaveable { mutableStateOf(defaultColumn) }
    val current = column ?: uncontrolled
    val setColumn: (SplitViewColumn) -> Unit = { nextColumn ->
        if (column == null) uncontrolled = nextColumn
        onColumnChange(nextColumn)
    }
    val titles = panes.associate { it.kind to it.title }
    BoxWithConstraints(modifier = modifier) {
        if (maxWidth >= WideBreakpoint) {
            WideSplitView(panes, setColumn)
        } else {
            AnimatedContent(
                targetState = current,
                transitionSpec = {
                    val forward = targetState.ordinal > initialState.ordinal
                    (slideInHorizontally(tween(300)) { if (forward) it / 3 else -it / 3 } + fadeIn(tween(300))) togetherWith
                        (slideOutHorizontally(tween(300)) { if (forward) -it / 3 else it / 3 } + fadeOut(tween(200)))
                },
                label = "splitView",
            ) { shown ->
                val pane = panes.firstOrNull { it.kind == shown }
                if (pane != null) {
                    val back = previous(pane.kind)?.takeIf { target ->
                        panes.any { it.kind == target } && !(target == SplitViewColumn.Sidebar && titles[target] == null)
                    }
                    CompactPane(pane, back, back?.let { titles[it] }, setColumn)
                }
            }
        }
    }
}

@Composable
private fun CompactPane(
    pane: SplitViewPane,
    back: SplitViewColumn?,
    backTitle: String?,
    setColumn: (SplitViewColumn) -> Unit,
) {
    val colors = EsuissTheme.colors
    CompositionLocalProvider(
        LocalSplitView provides SplitViewContext(compact = true, kind = pane.kind, setColumn = setColumn, items = remember { SplitViewItemEdges() }),
        LocalContentStyle provides Typography.base.copy(color = colors.label),
        LocalContentColor provides colors.label,
    ) {
        Column(
            modifier = pane.modifier
                .fillMaxSize()
                .verticalScroll(rememberScrollState())
                .padding(PaddingValues(horizontal = 16.dp, vertical = 8.dp)),
        ) {
            if (back != null) {
                val interaction = remember { MutableInteractionSource() }
                val pressed by interaction.collectIsPressedAsState()
                val tint = if (pressed) colors.link.copy(alpha = 0.6f) else colors.link
                Row(
                    modifier = Modifier
                        .heightIn(min = 44.dp)
                        .clickable(interactionSource = interaction, indication = null, role = Role.Button) { setColumn(back) },
                    verticalAlignment = Alignment.CenterVertically,
                    horizontalArrangement = Arrangement.spacedBy(2.dp),
                ) {
                    Icon(PhosphorIcons.Bold.CaretLeft, contentDescription = if (backTitle == null) "Back" else null, size = 18.dp, tint = tint)
                    if (backTitle != null) BasicText(backTitle, style = Typography.base.copy(color = tint))
                }
            }
            if (pane.title != null) {
                BasicText(
                    pane.title,
                    modifier = Modifier.padding(bottom = 8.dp).semantics { heading() },
                    style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.Bold),
                )
            }
            pane.content(this)
        }
    }
}

@Composable
private fun WideSplitView(panes: List<SplitViewPane>, setColumn: (SplitViewColumn) -> Unit) {
    val colors = EsuissTheme.colors
    val weights = panes.map {
        when (it.kind) {
            SplitViewColumn.Sidebar -> 0.20f
            SplitViewColumn.List -> 0.32f
            SplitViewColumn.Detail -> 0.48f
        }
    }
    Row(modifier = Modifier.fillMaxSize()) {
        panes.forEachIndexed { index, pane ->
            if (index > 0) Box(modifier = Modifier.width(1.dp).fillMaxHeight().background(colors.separator))
            CompositionLocalProvider(
                LocalSplitView provides SplitViewContext(compact = false, kind = pane.kind, setColumn = setColumn),
                LocalContentStyle provides Typography.base.copy(color = colors.label),
                LocalContentColor provides colors.label,
            ) {
                Column(
                    modifier = Modifier
                        .weight(weights[index])
                        .fillMaxHeight()
                        .verticalScroll(rememberScrollState())
                        .then(pane.modifier)
                        .padding(
                            when (pane.kind) {
                                SplitViewColumn.Sidebar -> PaddingValues(start = 12.dp, end = 12.dp, top = 4.dp, bottom = 12.dp)
                                SplitViewColumn.List -> PaddingValues(12.dp)
                                SplitViewColumn.Detail -> PaddingValues(32.dp)
                            },
                        ),
                ) {
                    if (pane.title != null) {
                        when (pane.kind) {
                            SplitViewColumn.Sidebar -> BasicText(
                                pane.title,
                                modifier = Modifier.padding(start = 12.dp, end = 12.dp, top = 12.dp, bottom = 8.dp).semantics { heading() },
                                style = Typography.xs.copy(color = colors.labelSecondary, fontWeight = FontWeight.SemiBold),
                            )
                            SplitViewColumn.List -> Box(
                                modifier = Modifier.semantics {
                                    heading()
                                    contentDescription = pane.title
                                },
                            )
                            SplitViewColumn.Detail -> BasicText(
                                pane.title,
                                modifier = Modifier.padding(bottom = 4.dp).semantics { heading() },
                                style = Typography.xl2.copy(color = colors.label, fontWeight = FontWeight.SemiBold),
                            )
                        }
                    }
                    pane.content(this)
                }
            }
        }
    }
}

@Composable
fun SplitViewItem(
    modifier: Modifier = Modifier,
    isActive: Boolean = false,
    onClick: () -> Unit = {},
    content: @Composable ColumnScope.() -> Unit,
) {
    val context = LocalSplitView.current ?: SplitViewContext(compact = true, kind = SplitViewColumn.List, setColumn = {})
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val id = remember { Any() }
    var top by remember { mutableFloatStateOf(Float.NaN) }
    val click = {
        onClick()
        context.setColumn(next(context.kind))
    }
    if (context.compact) {
        val separator = colors.separator
        val edges = context.items.edges
        DisposableEffect(edges) { onDispose { edges.remove(id) } }
        val divided = edges.any { (key, edge) -> key !== id && abs(edge.second - top) < 1f }
        Row(
            modifier = modifier
                .fillMaxWidth()
                .heightIn(min = 44.dp)
                .onPlaced {
                    val y = it.positionInRoot().y
                    top = y
                    edges[id] = y to y + it.size.height
                }
                .background(if (pressed) colors.itemPressed else Color.Transparent)
                .drawBehind { if (divided) drawRect(separator, Offset.Zero, Size(size.width, 1.dp.toPx())) }
                .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = click)
                .semantics { selected = isActive }
                .padding(vertical = 12.dp),
            horizontalArrangement = Arrangement.spacedBy(12.dp),
            verticalAlignment = Alignment.CenterVertically,
        ) {
            Column(modifier = Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(2.dp), content = content)
            if (context.kind != SplitViewColumn.Detail) {
                Icon(PhosphorIcons.Regular.CaretRight, contentDescription = null, size = 16.dp, tint = colors.labelTertiary)
            }
        }
    } else {
        val list = context.kind == SplitViewColumn.List
        val shape = RoundedCornerShape(if (list) Radius.xl else Radius.lg)
        Row(
            modifier = modifier
                .fillMaxWidth()
                .clip(shape)
                .background(
                    when {
                        pressed -> colors.itemPressed
                        isActive -> colors.surfaceSecondary
                        else -> Color.Transparent
                    },
                    shape,
                )
                .clickable(interactionSource = interaction, indication = null, role = Role.Button, onClick = click)
                .semantics { selected = isActive }
                .padding(horizontal = 12.dp, vertical = if (list) 12.dp else 8.dp),
            horizontalArrangement = Arrangement.spacedBy(12.dp),
            verticalAlignment = Alignment.CenterVertically,
        ) {
            Column(modifier = Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(2.dp), content = content)
        }
    }
}
```

4. Update the `com.esuiss.ui` package names to match your project.

## Usage

```tsx
import { UsersDetail } from "@/components/blocks/users-detail"
```

```tsx
<UsersDetail />
```

Replace `USERS`, `ROLES` and `INITIAL_SESSIONS` with your data. Use `onRoleChange`, `onSignOut`, `onSignOutAll`, `onSecurityChange`, `onSendPasswordReset` and `onNavigate` to call your API.