# Fab

A floating action button pinned to the bottom corner, with an optional label and speed-dial actions.

Fab is an open-source mobile component 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/components/fab

![Preview](https://uim.suiss.app/previews/components-fab--default.light.webp)

```tsx
import { View } from "react-native"
import { Fab } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

export function FabExample() {
  return (
    <View className="flex-1">
      <Page />
      <Fab accessibilityLabel="New note" />
    </View>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabExample: View {
  var body: some View {
    FabStage {
      Fab(accessibilityLabel: "New note", action: {}) { Ph.plus.bold }
    }
  }
}

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabExample() {
    FabPage {
        Fab(PhosphorIcons.Regular.Plus, contentDescription = "New note", onClick = {})
    }
}

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}
```

`Fab` is a round accent `Pressable` rendered through a portal and pinned to the bottom-end corner of the screen, above the safe-area insets. It comes in `default` and `lg` sizes, and becomes an extended pill when you pass a `label`.

When it has `FabAction` children, pressing it opens a speed dial: a scrim dims the screen and the actions rise above the button one after another. The plus icon rotates 45 degrees into a close mark; other icons swap to an X.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add fab
```

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

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

The CLI also adds what it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text).

### Manual

**Uniwind**

1. Install the dependencies:

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

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), and the primitives `components/primitives/hooks.tsx`, `components/primitives/portal.tsx`.

3. Copy the source into `components/ui/fab.tsx`:

```tsx title="uniwind/components/ui/fab.tsx"
import { cn } from "cn"
import {
  type Icon as PhosphorIcon,
  PlusIcon,
  XIcon,
} from "phosphor-react-native"
import * as React from "react"
import { I18nManager, Pressable, View } from "react-native"
import {
  Easing,
  FadeIn,
  FadeInDown,
  FadeOut,
  FadeOutDown,
  ReduceMotion,
  useAnimatedStyle,
  withTiming,
} from "react-native-reanimated"
import { useSafeAreaInsets } from "react-native-safe-area-context"
import { useBackHandler } from "@/components/primitives/hooks"
import { Portal } from "@/components/primitives/portal"
import { AnimatedView } from "@/components/ui/animated-view"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

type FabSize = "default" | "lg"

const FabContext = React.createContext<{ close: () => void } | null>(null)

const EASING = Easing.bezier(0.32, 0.72, 0, 1)

function isAction(node: React.ReactNode) {
  return React.isValidElement(node) && node.type === FabAction
}

function Fab({
  size = "default",
  icon = PlusIcon,
  label,
  open: openProp,
  defaultOpen = false,
  onOpenChange,
  portalHost,
  className,
  children,
  onPress,
  accessibilityState,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children"> & {
  size?: FabSize
  icon?: PhosphorIcon
  label?: React.ReactNode
  open?: boolean
  defaultOpen?: boolean
  onOpenChange?: (open: boolean) => void
  portalHost?: string
  children?: React.ReactNode
}) {
  const insets = useSafeAreaInsets()
  const id = React.useId()
  const [uncontrolledOpen, setUncontrolledOpen] = React.useState(defaultOpen)
  const actions = React.Children.toArray(children).filter(isAction)
  const hasActions = actions.length > 0
  const open = hasActions && (openProp ?? uncontrolledOpen)
  const extended = label !== undefined && label !== null

  const setOpen = React.useCallback(
    (next: boolean) => {
      if (openProp === undefined) setUncontrolledOpen(next)
      onOpenChange?.(next)
    },
    [openProp, onOpenChange]
  )

  const close = React.useCallback(() => setOpen(false), [setOpen])

  useBackHandler(open, close)

  const rotated = open && icon === PlusIcon

  const rotateStyle = useAnimatedStyle(() => ({
    transform: [
      {
        rotate: withTiming(rotated ? "45deg" : "0deg", {
          duration: 250,
          easing: EASING,
          reduceMotion: ReduceMotion.System,
        }),
      },
    ],
  }))

  const context = React.useMemo(() => ({ close }), [close])

  return (
    <Portal name={`fab-${id}`} hostName={portalHost}>
      <FabContext.Provider value={context}>
        {open ? (
          <AnimatedView
            as="Pressable"
            accessible={false}
            importantForAccessibility="no"
            entering={FadeIn.duration(200).reduceMotion(ReduceMotion.System)}
            exiting={FadeOut.duration(200).reduceMotion(ReduceMotion.System)}
            className="absolute inset-0 z-40 bg-scrim"
            onPress={close}
          />
        ) : null}
        <View
          className="absolute z-40 items-end"
          style={{
            bottom: insets.bottom + 16,
            end: (I18nManager.isRTL ? insets.left : insets.right) + 16,
            pointerEvents: "box-none",
          }}
        >
          <View
            className={cn("items-end gap-3", open && "mb-4")}
            onAccessibilityEscape={close}
            style={{ pointerEvents: "box-none" }}
          >
            {open
              ? actions.map((action, index) => (
                  <AnimatedView
                    key={React.isValidElement(action) ? action.key : index}
                    entering={FadeInDown.delay(
                      (actions.length - 1 - index) * 30
                    )
                      .duration(250)
                      .reduceMotion(ReduceMotion.System)}
                    exiting={FadeOutDown.duration(150).reduceMotion(
                      ReduceMotion.System
                    )}
                  >
                    {action}
                  </AnimatedView>
                ))
              : null}
          </View>
          <Pressable
            role="button"
            accessibilityState={
              hasActions
                ? { ...accessibilityState, expanded: open }
                : accessibilityState
            }
            onPress={(event) => {
              if (hasActions) setOpen(!open)
              onPress?.(event)
            }}
            className={cn(
              "flex-row items-center justify-center rounded-full bg-accent shadow-lg active:bg-accent-pressed",
              size === "lg"
                ? extended
                  ? "h-16 gap-2.5 px-6"
                  : "size-16"
                : extended
                  ? "h-14 gap-2 px-5"
                  : "size-14",
              className
            )}
            {...props}
          >
            <AnimatedView style={rotateStyle}>
              <Icon
                as={open && icon !== PlusIcon ? XIcon : icon}
                weight="bold"
                className={cn(
                  "text-on-accent",
                  size === "lg" ? "size-7" : "size-6"
                )}
              />
            </AnimatedView>
            {extended ? (
              typeof label === "string" || typeof label === "number" ? (
                <Text className="text-base font-semibold text-on-accent">
                  {label}
                </Text>
              ) : (
                label
              )
            ) : null}
          </Pressable>
        </View>
      </FabContext.Provider>
    </Portal>
  )
}

function FabAction({
  icon,
  className,
  children,
  onPress,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children"> & {
  icon: PhosphorIcon
  children?: React.ReactNode
}) {
  const fab = React.useContext(FabContext)
  return (
    <Pressable
      role="button"
      className={cn("flex-row items-center gap-3", className)}
      onPress={(event) => {
        onPress?.(event)
        fab?.close()
      }}
      {...props}
    >
      {({ pressed }) => (
        <>
          {children !== undefined ? (
            <View className="rounded-full bg-surface-raised px-3 py-1.5 shadow-md dark:bg-surface-secondary">
              {pressed ? (
                <View className="absolute inset-0 rounded-full bg-item-pressed" />
              ) : null}
              {typeof children === "string" || typeof children === "number" ? (
                <Text numberOfLines={1} className="text-sm font-medium">
                  {children}
                </Text>
              ) : (
                children
              )}
            </View>
          ) : null}
          <View className="size-11 items-center justify-center rounded-full bg-surface-raised shadow-md dark:bg-surface-secondary">
            {pressed ? (
              <View className="absolute inset-0 rounded-full bg-item-pressed" />
            ) : null}
            <Icon as={icon} className="size-5" />
          </View>
        </>
      )}
    </Pressable>
  )
}

export type { FabSize }
export { Fab, FabAction }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

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

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), and the primitives `components/primitives/hooks.tsx`, `components/primitives/portal.tsx`.

3. Copy the source into `components/ui/fab.tsx`:

```tsx title="nativewind/components/ui/fab.tsx"
import { cn } from "cn"
import {
  type Icon as PhosphorIcon,
  PlusIcon,
  XIcon,
} from "phosphor-react-native"
import * as React from "react"
import { I18nManager, Pressable, View } from "react-native"
import {
  Easing,
  FadeIn,
  FadeInDown,
  FadeOut,
  FadeOutDown,
  ReduceMotion,
  useAnimatedStyle,
  withTiming,
} from "react-native-reanimated"
import { useSafeAreaInsets } from "react-native-safe-area-context"
import { useBackHandler } from "@/components/primitives/hooks"
import { Portal } from "@/components/primitives/portal"
import { AnimatedView } from "@/components/ui/animated-view"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

type FabSize = "default" | "lg"

const FabContext = React.createContext<{ close: () => void } | null>(null)

const EASING = Easing.bezier(0.32, 0.72, 0, 1)

function isAction(node: React.ReactNode) {
  return React.isValidElement(node) && node.type === FabAction
}

function Fab({
  size = "default",
  icon = PlusIcon,
  label,
  open: openProp,
  defaultOpen = false,
  onOpenChange,
  portalHost,
  className,
  children,
  onPress,
  accessibilityState,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children"> & {
  size?: FabSize
  icon?: PhosphorIcon
  label?: React.ReactNode
  open?: boolean
  defaultOpen?: boolean
  onOpenChange?: (open: boolean) => void
  portalHost?: string
  children?: React.ReactNode
}) {
  const insets = useSafeAreaInsets()
  const id = React.useId()
  const [uncontrolledOpen, setUncontrolledOpen] = React.useState(defaultOpen)
  const actions = React.Children.toArray(children).filter(isAction)
  const hasActions = actions.length > 0
  const open = hasActions && (openProp ?? uncontrolledOpen)
  const extended = label !== undefined && label !== null

  const setOpen = React.useCallback(
    (next: boolean) => {
      if (openProp === undefined) setUncontrolledOpen(next)
      onOpenChange?.(next)
    },
    [openProp, onOpenChange]
  )

  const close = React.useCallback(() => setOpen(false), [setOpen])

  useBackHandler(open, close)

  const rotated = open && icon === PlusIcon

  const rotateStyle = useAnimatedStyle(() => ({
    transform: [
      {
        rotate: withTiming(rotated ? "45deg" : "0deg", {
          duration: 250,
          easing: EASING,
          reduceMotion: ReduceMotion.System,
        }),
      },
    ],
  }))

  const context = React.useMemo(() => ({ close }), [close])

  return (
    <Portal name={`fab-${id}`} hostName={portalHost}>
      <FabContext.Provider value={context}>
        {open ? (
          <AnimatedView
            as="Pressable"
            accessible={false}
            importantForAccessibility="no"
            entering={FadeIn.duration(200).reduceMotion(ReduceMotion.System)}
            exiting={FadeOut.duration(200).reduceMotion(ReduceMotion.System)}
            className="absolute inset-0 z-40 bg-scrim"
            onPress={close}
          />
        ) : null}
        <View
          className="absolute z-40 items-end"
          style={{
            bottom: insets.bottom + 16,
            end: (I18nManager.isRTL ? insets.left : insets.right) + 16,
            pointerEvents: "box-none",
          }}
        >
          <View
            className={cn("items-end gap-3", open && "mb-4")}
            onAccessibilityEscape={close}
            style={{ pointerEvents: "box-none" }}
          >
            {open
              ? actions.map((action, index) => (
                  <AnimatedView
                    key={React.isValidElement(action) ? action.key : index}
                    entering={FadeInDown.delay(
                      (actions.length - 1 - index) * 30
                    )
                      .duration(250)
                      .reduceMotion(ReduceMotion.System)}
                    exiting={FadeOutDown.duration(150).reduceMotion(
                      ReduceMotion.System
                    )}
                  >
                    {action}
                  </AnimatedView>
                ))
              : null}
          </View>
          <Pressable
            role="button"
            accessibilityState={
              hasActions
                ? { ...accessibilityState, expanded: open }
                : accessibilityState
            }
            onPress={(event) => {
              if (hasActions) setOpen(!open)
              onPress?.(event)
            }}
            className={cn(
              "flex-row items-center justify-center rounded-full bg-accent shadow-lg active:bg-accent-pressed",
              size === "lg"
                ? extended
                  ? "h-16 gap-2.5 px-6"
                  : "size-16"
                : extended
                  ? "h-14 gap-2 px-5"
                  : "size-14",
              className
            )}
            {...props}
          >
            <AnimatedView style={rotateStyle}>
              <Icon
                as={open && icon !== PlusIcon ? XIcon : icon}
                weight="bold"
                className={cn(
                  "text-on-accent",
                  size === "lg" ? "size-7" : "size-6"
                )}
              />
            </AnimatedView>
            {extended ? (
              typeof label === "string" || typeof label === "number" ? (
                <Text className="text-base font-semibold text-on-accent">
                  {label}
                </Text>
              ) : (
                label
              )
            ) : null}
          </Pressable>
        </View>
      </FabContext.Provider>
    </Portal>
  )
}

function FabAction({
  icon,
  className,
  children,
  onPress,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children"> & {
  icon: PhosphorIcon
  children?: React.ReactNode
}) {
  const fab = React.useContext(FabContext)
  return (
    <Pressable
      role="button"
      className={cn("flex-row items-center gap-3", className)}
      onPress={(event) => {
        onPress?.(event)
        fab?.close()
      }}
      {...props}
    >
      {({ pressed }) => (
        <>
          {children !== undefined ? (
            <View className="rounded-full bg-surface-raised px-3 py-1.5 shadow-md dark:bg-surface-secondary">
              {pressed ? (
                <View className="absolute inset-0 rounded-full bg-item-pressed" />
              ) : null}
              {typeof children === "string" || typeof children === "number" ? (
                <Text numberOfLines={1} className="text-sm font-medium">
                  {children}
                </Text>
              ) : (
                children
              )}
            </View>
          ) : null}
          <View className="size-11 items-center justify-center rounded-full bg-surface-raised shadow-md dark:bg-surface-secondary">
            {pressed ? (
              <View className="absolute inset-0 rounded-full bg-item-pressed" />
            ) : null}
            <Icon as={icon} className="size-5" />
          </View>
        </>
      )}
    </Pressable>
  )
}

export type { FabSize }
export { Fab, FabAction }
```

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-safe-area-context react-native-svg react-native-worklets
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), and the primitives `components/primitives/hooks.tsx`, `components/primitives/portal.tsx`.

3. Copy the source into `components/ui/fab.tsx`:

```tsx title="stylesheet/components/ui/fab.tsx"
import {
  type Icon as PhosphorIcon,
  PlusIcon,
  XIcon,
} from "phosphor-react-native"
import * as React from "react"
import {
  I18nManager,
  Pressable,
  type StyleProp,
  StyleSheet,
  View,
  type ViewStyle,
} from "react-native"
import {
  Easing,
  FadeIn,
  FadeInDown,
  FadeOut,
  FadeOutDown,
  ReduceMotion,
  useAnimatedStyle,
  withTiming,
} from "react-native-reanimated"
import { useSafeAreaInsets } from "react-native-safe-area-context"
import { useBackHandler } from "@/components/primitives/hooks"
import { Portal } from "@/components/primitives/portal"
import { AnimatedView } from "@/components/ui/animated-view"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"
import { fontSize, radius, shadow, useTheme } from "@/components/ui/theme"

type FabSize = "default" | "lg"

const FabContext = React.createContext<{ close: () => void } | null>(null)

const EASING = Easing.bezier(0.32, 0.72, 0, 1)

const styles = StyleSheet.create({
  scrim: {
    position: "absolute",
    top: 0,
    right: 0,
    bottom: 0,
    left: 0,
    zIndex: 40,
  },
  frame: { position: "absolute", zIndex: 40, alignItems: "flex-end" },
  actions: { alignItems: "flex-end", gap: 12 },
  actionsOpen: { marginBottom: 16 },
  button: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "center",
    borderRadius: radius.full,
    ...shadow.lg,
  },
  default: { width: 56, height: 56 },
  lg: { width: 64, height: 64 },
  defaultExtended: { height: 56, gap: 8, paddingHorizontal: 20 },
  lgExtended: { height: 64, gap: 10, paddingHorizontal: 24 },
  label: { ...fontSize.base, fontWeight: "600" },
  action: { flexDirection: "row", alignItems: "center", gap: 12 },
  pill: {
    borderRadius: radius.full,
    paddingHorizontal: 12,
    paddingVertical: 6,
    ...shadow.md,
  },
  pillText: { ...fontSize.sm, fontWeight: "500" },
  circle: {
    width: 44,
    height: 44,
    alignItems: "center",
    justifyContent: "center",
    borderRadius: radius.full,
    ...shadow.md,
  },
  overlay: {
    position: "absolute",
    top: 0,
    right: 0,
    bottom: 0,
    left: 0,
    borderRadius: radius.full,
  },
})

function isAction(node: React.ReactNode) {
  return React.isValidElement(node) && node.type === FabAction
}

function Fab({
  size = "default",
  icon = PlusIcon,
  label,
  open: openProp,
  defaultOpen = false,
  onOpenChange,
  portalHost,
  style,
  children,
  onPress,
  accessibilityState,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children" | "style"> & {
  style?: StyleProp<ViewStyle>
  size?: FabSize
  icon?: PhosphorIcon
  label?: React.ReactNode
  open?: boolean
  defaultOpen?: boolean
  onOpenChange?: (open: boolean) => void
  portalHost?: string
  children?: React.ReactNode
}) {
  const { colors } = useTheme()
  const insets = useSafeAreaInsets()
  const id = React.useId()
  const [uncontrolledOpen, setUncontrolledOpen] = React.useState(defaultOpen)
  const actions = React.Children.toArray(children).filter(isAction)
  const hasActions = actions.length > 0
  const open = hasActions && (openProp ?? uncontrolledOpen)
  const extended = label !== undefined && label !== null

  const setOpen = React.useCallback(
    (next: boolean) => {
      if (openProp === undefined) setUncontrolledOpen(next)
      onOpenChange?.(next)
    },
    [openProp, onOpenChange]
  )

  const close = React.useCallback(() => setOpen(false), [setOpen])

  useBackHandler(open, close)

  const rotated = open && icon === PlusIcon

  const rotateStyle = useAnimatedStyle(() => ({
    transform: [
      {
        rotate: withTiming(rotated ? "45deg" : "0deg", {
          duration: 250,
          easing: EASING,
          reduceMotion: ReduceMotion.System,
        }),
      },
    ],
  }))

  const context = React.useMemo(() => ({ close }), [close])

  return (
    <Portal name={`fab-${id}`} hostName={portalHost}>
      <FabContext.Provider value={context}>
        {open ? (
          <AnimatedView
            as="Pressable"
            accessible={false}
            importantForAccessibility="no"
            entering={FadeIn.duration(200).reduceMotion(ReduceMotion.System)}
            exiting={FadeOut.duration(200).reduceMotion(ReduceMotion.System)}
            style={[styles.scrim, { backgroundColor: colors.scrim }]}
            onPress={close}
          />
        ) : null}
        <View
          style={[
            styles.frame,
            {
              bottom: insets.bottom + 16,
              end: (I18nManager.isRTL ? insets.left : insets.right) + 16,
              pointerEvents: "box-none",
            },
          ]}
        >
          <View
            onAccessibilityEscape={close}
            style={[
              styles.actions,
              open && styles.actionsOpen,
              { pointerEvents: "box-none" },
            ]}
          >
            {open
              ? actions.map((action, index) => (
                  <AnimatedView
                    key={React.isValidElement(action) ? action.key : index}
                    entering={FadeInDown.delay(
                      (actions.length - 1 - index) * 30
                    )
                      .duration(250)
                      .reduceMotion(ReduceMotion.System)}
                    exiting={FadeOutDown.duration(150).reduceMotion(
                      ReduceMotion.System
                    )}
                  >
                    {action}
                  </AnimatedView>
                ))
              : null}
          </View>
          <Pressable
            role="button"
            accessibilityState={
              hasActions
                ? { ...accessibilityState, expanded: open }
                : accessibilityState
            }
            onPress={(event) => {
              if (hasActions) setOpen(!open)
              onPress?.(event)
            }}
            style={({ pressed }) => [
              styles.button,
              styles[
                size === "lg"
                  ? extended
                    ? "lgExtended"
                    : "lg"
                  : extended
                    ? "defaultExtended"
                    : "default"
              ],
              {
                backgroundColor: pressed ? colors.accentPressed : colors.accent,
              },
              style,
            ]}
            {...props}
          >
            <AnimatedView style={rotateStyle}>
              <Icon
                as={open && icon !== PlusIcon ? XIcon : icon}
                weight="bold"
                size={size === "lg" ? 28 : 24}
                color={colors.onAccent}
              />
            </AnimatedView>
            {extended ? (
              typeof label === "string" || typeof label === "number" ? (
                <Text style={[styles.label, { color: colors.onAccent }]}>
                  {label}
                </Text>
              ) : (
                label
              )
            ) : null}
          </Pressable>
        </View>
      </FabContext.Provider>
    </Portal>
  )
}

function FabAction({
  icon,
  style,
  children,
  onPress,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children" | "style"> & {
  icon: PhosphorIcon
  children?: React.ReactNode
  style?: StyleProp<ViewStyle>
}) {
  const { colors, isDark } = useTheme()
  const raised = {
    backgroundColor: isDark ? colors.surfaceSecondary : colors.surfaceRaised,
  }
  const overlay = [styles.overlay, { backgroundColor: colors.itemPressed }]
  const fab = React.useContext(FabContext)
  return (
    <Pressable
      role="button"
      style={[styles.action, style]}
      onPress={(event) => {
        onPress?.(event)
        fab?.close()
      }}
      {...props}
    >
      {({ pressed }) => (
        <>
          {children !== undefined ? (
            <View style={[styles.pill, raised]}>
              {pressed ? <View style={overlay} /> : null}
              {typeof children === "string" || typeof children === "number" ? (
                <Text numberOfLines={1} style={styles.pillText}>
                  {children}
                </Text>
              ) : (
                children
              )}
            </View>
          ) : null}
          <View style={[styles.circle, raised]}>
            {pressed ? <View style={overlay} /> : null}
            <Icon as={icon} size={20} />
          </View>
        </>
      )}
    </Pressable>
  )
}

export type { FabSize }
export { Fab, FabAction }
```

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/Components/Fab.swift"
import PhosphorSwift
import SwiftUI

public enum FabSize: CaseIterable, Sendable {
  case `default`, lg

  var dimension: CGFloat {
    switch self {
    case .default: 56
    case .lg: 64
    }
  }

  var iconSize: CGFloat {
    switch self {
    case .default: 24
    case .lg: 28
    }
  }
}

struct FabContext {
  var inset: CGFloat
  var close: () -> Void
}

extension EnvironmentValues {
  @Entry var fab: FabContext?
}

public struct Fab<Icon: View, Actions: View>: View {
  let label: Text?
  let accessibility: Text?
  let size: FabSize
  let external: Binding<Bool>?
  let action: (() -> Void)?
  let plus: Bool
  let icon: Icon
  let actions: Actions

  @State private var local = false
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    _ label: LocalizedStringKey? = nil,
    size: FabSize = .default,
    isExpanded: Binding<Bool>? = nil,
    @ViewBuilder icon: () -> Icon,
    @ViewBuilder actions: () -> Actions
  ) {
    self.label = label.map { Text($0) }
    accessibility = nil
    self.size = size
    external = isExpanded
    action = nil
    plus = false
    self.icon = icon()
    self.actions = actions()
  }

  public init(
    accessibilityLabel: LocalizedStringKey,
    size: FabSize = .default,
    isExpanded: Binding<Bool>? = nil,
    @ViewBuilder icon: () -> Icon,
    @ViewBuilder actions: () -> Actions
  ) {
    label = nil
    accessibility = Text(accessibilityLabel)
    self.size = size
    external = isExpanded
    action = nil
    plus = false
    self.icon = icon()
    self.actions = actions()
  }

  private var expanded: Binding<Bool> { external ?? $local }

  private func set(_ value: Bool) {
    if reduceMotion {
      expanded.wrappedValue = value
    } else {
      withAnimation(.timingCurve(0.32, 0.72, 0, 1, duration: 0.3)) { expanded.wrappedValue = value }
    }
  }

  public var body: some View {
    let open = action == nil && expanded.wrappedValue
    ZStack(alignment: .bottomTrailing) {
      if open {
        Color.scrim
          .ignoresSafeArea()
          .contentShape(Rectangle())
          .onTapGesture { set(false) }
          .accessibilityHidden(true)
          .transition(.opacity)
      }
      VStack(alignment: .trailing, spacing: 16) {
        if open {
          VStack(alignment: .trailing, spacing: 12) {
            actions
          }
          .environment(\.fab, FabContext(inset: max(0, (size.dimension - 44) / 2)) { set(false) })
          .transition(
            reduceMotion
              ? .opacity
              : .offset(y: 24).combined(with: .scale(scale: 0.9, anchor: .bottomTrailing)).combined(with: .opacity)
          )
        }
        main(open: open)
      }
      .padding(16)
    }
    .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .bottomTrailing)
    .accessibilityElement(children: .contain)
    .accessibilityAction(.escape) {
      if open { set(false) }
    }
  }

  private func main(open: Bool) -> some View {
    Button {
      if let action {
        action()
      } else {
        set(!expanded.wrappedValue)
      }
    } label: {
      EmptyView()
    }
    .buttonStyle(FabButtonStyle(size: size, label: label, open: open, rotates: plus) { icon })
    .accessibilityLabel(label ?? accessibility ?? Text(open ? "Close actions" : "Show actions"))
    .accessibilityValue(action == nil ? Text(open ? "Expanded" : "Collapsed") : Text(verbatim: ""))
  }
}

extension Fab where Actions == EmptyView {
  public init(
    _ label: LocalizedStringKey,
    size: FabSize = .default,
    action: @escaping () -> Void,
    @ViewBuilder icon: () -> Icon
  ) {
    self.label = Text(label)
    accessibility = nil
    self.size = size
    external = nil
    self.action = action
    plus = false
    self.icon = icon()
    actions = EmptyView()
  }

  public init(
    accessibilityLabel: LocalizedStringKey,
    size: FabSize = .default,
    action: @escaping () -> Void,
    @ViewBuilder icon: () -> Icon
  ) {
    label = nil
    accessibility = Text(accessibilityLabel)
    self.size = size
    external = nil
    self.action = action
    plus = false
    self.icon = icon()
    actions = EmptyView()
  }
}

extension Fab where Icon == Image {
  public init(
    _ label: LocalizedStringKey? = nil,
    size: FabSize = .default,
    isExpanded: Binding<Bool>? = nil,
    @ViewBuilder actions: () -> Actions
  ) {
    self.label = label.map { Text($0) }
    accessibility = nil
    self.size = size
    external = isExpanded
    action = nil
    plus = true
    icon = Ph.plus.bold
    self.actions = actions()
  }

  public init(
    accessibilityLabel: LocalizedStringKey,
    size: FabSize = .default,
    isExpanded: Binding<Bool>? = nil,
    @ViewBuilder actions: () -> Actions
  ) {
    label = nil
    accessibility = Text(accessibilityLabel)
    self.size = size
    external = isExpanded
    action = nil
    plus = true
    icon = Ph.plus.bold
    self.actions = actions()
  }
}

private struct FabButtonStyle<Icon: View>: ButtonStyle {
  let size: FabSize
  let label: Text?
  let open: Bool
  let rotates: Bool
  @ViewBuilder let icon: () -> Icon

  @Environment(\.isEnabled) private var isEnabled

  func makeBody(configuration: Configuration) -> some View {
    let pressed = configuration.isPressed
    HStack(spacing: 8) {
      Group {
        if open && !rotates {
          Ph.x.bold
        } else {
          icon()
        }
      }
      .frame(width: size.iconSize, height: size.iconSize)
      .rotationEffect(.degrees(open && rotates ? 45 : 0))
      if let label {
        label
          .scaledFont(.base, weight: .semibold)
          .lineLimit(1)
      }
    }
    .foregroundStyle(Color.onAccent)
    .padding(.horizontal, label == nil ? 0 : 20)
    .frame(minWidth: size.dimension, minHeight: size.dimension, maxHeight: size.dimension)
    .background {
      Capsule()
        .fill(!isEnabled ? Color.accentDisabled : pressed ? .accentPressed : .accent)
        .shadow(isEnabled ? .lg : Shadow(color: .clear, radius: 0))
    }
    .scaleEffect(pressed ? 0.96 : 1)
    .animation(.easeOut(duration: 0.15), value: pressed)
    .contentShape(Capsule())
  }
}

public struct FabAction<Icon: View>: View {
  let title: Text
  let action: () -> Void
  let icon: Icon

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

  public init(_ title: LocalizedStringKey, action: @escaping () -> Void, @ViewBuilder icon: () -> Icon) {
    self.title = Text(title)
    self.action = action
    self.icon = icon()
  }

  public init(verbatim title: String, action: @escaping () -> Void, @ViewBuilder icon: () -> Icon) {
    self.title = Text(verbatim: title)
    self.action = action
    self.icon = icon()
  }

  public var body: some View {
    Button {
      fab?.close()
      action()
    } label: {
      EmptyView()
    }
    .buttonStyle(PressReader { pressed in
      HStack(spacing: 12) {
        title
          .scaledFont(.sm, weight: .medium)
          .lineLimit(1)
          .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          .padding(.horizontal, 12)
          .frame(height: 32)
          .background {
            Capsule()
              .fill(pressed ? Color.itemPressed : .clear)
              .background(Color.surfaceRaised, in: Capsule())
              .shadow(.md)
          }
        icon
          .frame(width: 20, height: 20)
          .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          .frame(width: 44, height: 44)
          .background {
            Circle()
              .fill(pressed ? Color.itemPressed : .clear)
              .background(Color.surfaceRaised, in: Circle())
              .shadow(.md)
          }
      }
      .padding(.trailing, fab?.inset ?? 0)
      .contentShape(Rectangle())
    })
    .accessibilityLabel(title)
  }
}
```

```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/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/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/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)
  }
}
```

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/components/Fab.kt"
package com.esuiss.ui.components

import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.core.MutableTransitionState
import androidx.compose.animation.core.animateFloatAsState
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.slideInVertically
import androidx.compose.animation.slideOutVertically
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.gestures.detectTapGestures
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.Row
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
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.windowInsetsPadding
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.getValue
import androidx.compose.runtime.mutableStateOf
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.draw.drawBehind
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.layout.onGloballyPositioned
import androidx.compose.ui.layout.positionInWindow
import androidx.compose.ui.platform.LocalWindowInfo
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.clearAndSetSemantics
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.semantics.stateDescription
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Plus
import com.adamglin.phosphoricons.regular.X
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.Typography
import com.esuiss.ui.theme.shadow

enum class FabSize(internal val size: Dp, internal val iconSize: Dp) {
    Default(56.dp, 24.dp),
    Lg(64.dp, 28.dp),
}

private val LocalFabClose = staticCompositionLocalOf<() -> Unit> { {} }

@Composable
fun Fab(
    icon: ImageVector,
    contentDescription: String,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    size: FabSize = FabSize.Default,
    label: String? = null,
    enabled: Boolean = true,
) {
    FabFrame(modifier) {
        FabButton(icon, contentDescription, onClick, size, label, enabled, rotation = 0f, expanded = null)
    }
}

@Composable
fun Fab(
    icon: ImageVector,
    contentDescription: String,
    open: Boolean,
    onOpenChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    size: FabSize = FabSize.Default,
    label: String? = null,
    enabled: Boolean = true,
    actions: @Composable ColumnScope.() -> Unit,
) {
    val transition = remember { MutableTransitionState(false) }
    transition.targetState = open
    val plus = icon == PhosphorIcons.Regular.Plus
    val rotation by animateFloatAsState(if (open && plus) 45f else 0f, tween(250, easing = FormEasing), label = "fab")
    Box(modifier = Modifier.fillMaxSize()) {
        FabScrim(open, onDismiss = { onOpenChange(false) })
        FabFrame(modifier) {
            Column(
                horizontalAlignment = Alignment.End,
                verticalArrangement = Arrangement.spacedBy(16.dp),
            ) {
                AnimatedVisibility(
                    visibleState = transition,
                    enter = fadeIn(tween(200)) + slideInVertically(tween(250, easing = FormEasing)) { it / 4 } +
                        scaleIn(tween(250, easing = FormEasing), initialScale = 0.9f),
                    exit = fadeOut(tween(150)) + slideOutVertically(tween(200, easing = FormEasing)) { it / 4 } +
                        scaleOut(tween(200, easing = FormEasing), targetScale = 0.9f),
                ) {
                    CompositionLocalProvider(LocalFabClose provides { onOpenChange(false) }) {
                        Column(
                            modifier = Modifier.padding(end = (size.size - FabActionSize) / 2),
                            horizontalAlignment = Alignment.End,
                            verticalArrangement = Arrangement.spacedBy(12.dp),
                            content = actions,
                        )
                    }
                }
                FabButton(
                    if (open && !plus) PhosphorIcons.Regular.X else icon,
                    contentDescription,
                    { onOpenChange(!open) },
                    size,
                    label,
                    enabled,
                    rotation,
                    expanded = open,
                )
            }
        }
    }
}

private val FabActionSize = 44.dp

@Composable
private fun FabScrim(open: Boolean, onDismiss: () -> Unit) {
    val color = EsuissTheme.colors.scrim
    val alpha by animateFloatAsState(if (open) 1f else 0f, tween(200), label = "scrim")
    val container = LocalWindowInfo.current.containerSize
    var origin by remember { mutableStateOf(Offset.Zero) }
    if (alpha == 0f && !open) return
    Box(
        modifier = Modifier
            .fillMaxSize()
            .onGloballyPositioned { origin = it.positionInWindow() }
            .drawBehind {
                drawRect(
                    color = color.copy(alpha = color.alpha * alpha),
                    topLeft = -origin,
                    size = Size(container.width.toFloat(), container.height.toFloat()),
                )
            }
            .then(if (open) Modifier.pointerInput(Unit) { detectTapGestures { onDismiss() } } else Modifier),
    )
}

@Composable
fun FabAction(
    icon: ImageVector,
    label: String,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
) {
    val colors = EsuissTheme.colors
    val close = LocalFabClose.current
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Row(
        modifier = modifier
            .clickable(interactionSource = interaction, indication = null, role = Role.Button) {
                onClick()
                close()
            }
            .clearAndSetSemantics { contentDescription = label },
        horizontalArrangement = Arrangement.spacedBy(12.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        BasicText(
            label,
            modifier = Modifier
                .shadow(Shadows.md, CircleShape)
                .background(if (pressed) colors.surfaceSecondary else colors.surfaceRaised, CircleShape)
                .padding(horizontal = 12.dp, vertical = 6.dp),
            style = Typography.sm.copy(color = colors.label, fontWeight = FontWeight.Medium),
            maxLines = 1,
        )
        Box(
            modifier = Modifier
                .size(FabActionSize)
                .shadow(Shadows.md, CircleShape)
                .background(if (pressed) colors.surfaceSecondary else colors.surfaceRaised, CircleShape),
            contentAlignment = Alignment.Center,
        ) {
            Icon(icon, contentDescription = null, size = 20.dp, tint = colors.label)
        }
    }
}

@Composable
private fun FabFrame(modifier: Modifier, content: @Composable () -> Unit) {
    Box(
        modifier = Modifier
            .fillMaxSize()
            .windowInsetsPadding(WindowInsets.safeDrawing.only(WindowInsetsSides.Bottom + WindowInsetsSides.End))
            .padding(16.dp),
        contentAlignment = Alignment.BottomEnd,
    ) {
        Box(modifier = modifier) { content() }
    }
}

@Composable
private fun FabButton(
    icon: ImageVector,
    contentDescription: String,
    onClick: () -> Unit,
    size: FabSize,
    label: String?,
    enabled: Boolean,
    rotation: Float,
    expanded: Boolean?,
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val scale by animateFloatAsState(if (pressed && enabled) 0.95f else 1f, tween(150), label = "press")
    val background = when {
        !enabled -> colors.accentDisabled
        pressed -> colors.accentPressed
        else -> colors.accent
    }
    Row(
        modifier = Modifier
            .graphicsLayer {
                scaleX = scale
                scaleY = scale
            }
            .height(size.size)
            .then(if (label == null) Modifier.size(size.size) else Modifier)
            .then(if (enabled) Modifier.shadow(Shadows.lg, CircleShape) else Modifier)
            .clip(CircleShape)
            .background(background, CircleShape)
            .clickable(
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                role = Role.Button,
                onClick = onClick,
            )
            .semantics {
                this.contentDescription = contentDescription
                if (expanded != null) stateDescription = if (expanded) "Expanded" else "Collapsed"
            }
            .padding(horizontal = if (label == null) 0.dp else 20.dp),
        horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.CenterHorizontally),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        Icon(
            icon,
            contentDescription = null,
            modifier = Modifier.graphicsLayer { rotationZ = rotation },
            size = size.iconSize,
            tint = colors.onAccent,
        )
        if (label != null) {
            BasicText(
                label,
                style = Typography.base.copy(color = colors.onAccent, fontWeight = FontWeight.SemiBold),
                maxLines = 1,
            )
        }
    }
}
```

```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/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/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/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),
    )
}
```

4. Update the `com.esuiss.ui` package names to match your project.

## Usage

```tsx
import { Fab, FabAction } from "@/components/ui/fab"
```

```tsx
<View className="flex-1">
  <Page />
  <Fab accessibilityLabel="New note" />
</View>
```

Use the default plus icon or pass any Phosphor icon to `icon`. Give an icon-only button an `accessibilityLabel`.

For a speed dial, add `FabAction` children with an `icon` and an optional text label. Pressing an action calls its `onPress` and closes the dial. Tapping the scrim or pressing the Android back button also closes it. Use `open`, `defaultOpen` and `onOpenChange` to control it.

Pass `portalHost` to render into a named portal host.

## Examples

### Large

The `lg` size with a custom icon.

![Preview](https://uim.suiss.app/previews/components-fab--large.light.webp)

```tsx
import { PencilSimpleIcon } from "phosphor-react-native"
import { View } from "react-native"
import { Fab } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

export function FabLargeExample() {
  return (
    <View className="flex-1">
      <Page />
      <Fab size="lg" icon={PencilSimpleIcon} accessibilityLabel="Compose" />
    </View>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabLargeExample: View {
  var body: some View {
    FabStage {
      Fab(accessibilityLabel: "Compose", size: .lg, action: {}) { Ph.pencilSimple.bold }
    }
  }
}

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.PencilSimple
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.FabSize
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabLargeExample() {
    FabPage {
        Fab(PhosphorIcons.Regular.PencilSimple, contentDescription = "Compose", onClick = {}, size = FabSize.Lg)
    }
}

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}
```

### Extended

A label beside the icon.

![Preview](https://uim.suiss.app/previews/components-fab--extended.light.webp)

```tsx
import { PencilSimpleIcon } from "phosphor-react-native"
import { View } from "react-native"
import { Fab } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

export function FabExtendedExample() {
  return (
    <View className="flex-1">
      <Page />
      <Fab icon={PencilSimpleIcon} label="Compose" />
    </View>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabExtendedExample: View {
  var body: some View {
    FabStage {
      Fab("Compose", action: {}) { Ph.pencilSimple.bold }
    }
  }
}

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.PencilSimple
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabExtendedExample() {
    FabPage {
        Fab(PhosphorIcons.Regular.PencilSimple, contentDescription = "Compose", onClick = {}, label = "Compose")
    }
}

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}
```

### Large extended

A large extended button.

![Preview](https://uim.suiss.app/previews/components-fab--large-extended.light.webp)

```tsx
import { View } from "react-native"
import { Fab } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

export function FabLargeExtendedExample() {
  return (
    <View className="flex-1">
      <Page />
      <Fab size="lg" label="New note" />
    </View>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabLargeExtendedExample: View {
  var body: some View {
    FabStage {
      Fab("New note", size: .lg, action: {}) { Ph.plus.bold }
    }
  }
}

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.FabSize
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabLargeExtendedExample() {
    FabPage {
        Fab(PhosphorIcons.Regular.Plus, contentDescription = "New note", onClick = {}, size = FabSize.Lg, label = "New note")
    }
}

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}
```

### Speed dial open

A speed dial that starts open.

![Preview](https://uim.suiss.app/previews/components-fab--speed-dial-open.light.webp)

```tsx
import { CameraIcon, FileTextIcon, ImageIcon, NotePencilIcon } from "phosphor-react-native"
import * as React from "react"
import { View } from "react-native"
import { Fab, FabAction } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

function SpeedDial({ defaultOpen = false }: { defaultOpen?: boolean }) {
  const [log, setLog] = React.useState("")
  return (
    <View className="flex-1">
      <Page log={log} />
      <Fab accessibilityLabel="Create" defaultOpen={defaultOpen}>
        <FabAction icon={NotePencilIcon} onPress={() => setLog("New note")}>
          New note
        </FabAction>
        <FabAction icon={CameraIcon} onPress={() => setLog("Take photo")}>
          Take photo
        </FabAction>
        <FabAction icon={ImageIcon} onPress={() => setLog("Add image")}>
          Add image
        </FabAction>
        <FabAction icon={FileTextIcon} onPress={() => setLog("Scan document")}>
          Scan document
        </FabAction>
      </Fab>
    </View>
  )
}

export function FabSpeedDialOpenExample() {
  return (
    <SpeedDial defaultOpen />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabSpeedDialOpenExample: View {
  var body: some View {
    FabSpeedDial(open: true)
  }
}

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}

struct FabSpeedDial: View {
  @State private var open: Bool
  @State private var log = ""

  init(open: Bool) {
    _open = State(initialValue: open)
  }

  var body: some View {
    FabStage(log: log) {
      Fab(accessibilityLabel: "Create", isExpanded: $open) {
        FabAction("New note", action: { log = "New note" }) { Ph.notePencil.regular }
        FabAction("Take photo", action: { log = "Take photo" }) { Ph.camera.regular }
        FabAction("Add image", action: { log = "Add image" }) { Ph.image.regular }
        FabAction("Scan document", action: { log = "Scan document" }) { Ph.fileText.regular }
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Camera
import com.adamglin.phosphoricons.regular.FileText
import com.adamglin.phosphoricons.regular.Image
import com.adamglin.phosphoricons.regular.NotePencil
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.FabAction
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabSpeedDialOpenExample() {
    FabSpeedDial(defaultOpen = true)
}

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}

@Composable
fun FabSpeedDial(defaultOpen: Boolean) {
    var open by rememberSaveable { mutableStateOf(defaultOpen) }
    var log by rememberSaveable { mutableStateOf("") }
    FabPage(log) {
        Fab(PhosphorIcons.Regular.Plus, contentDescription = "Create", open = open, onOpenChange = { open = it }) {
            FabAction(PhosphorIcons.Regular.NotePencil, "New note", { log = "New note" })
            FabAction(PhosphorIcons.Regular.Camera, "Take photo", { log = "Take photo" })
            FabAction(PhosphorIcons.Regular.Image, "Add image", { log = "Add image" })
            FabAction(PhosphorIcons.Regular.FileText, "Scan document", { log = "Scan document" })
        }
    }
}
```

### Speed dial closed

A speed dial that opens on press.

![Preview](https://uim.suiss.app/previews/components-fab--speed-dial-closed.light.webp)

```tsx
import { CameraIcon, FileTextIcon, ImageIcon, NotePencilIcon } from "phosphor-react-native"
import * as React from "react"
import { View } from "react-native"
import { Fab, FabAction } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

function SpeedDial({ defaultOpen = false }: { defaultOpen?: boolean }) {
  const [log, setLog] = React.useState("")
  return (
    <View className="flex-1">
      <Page log={log} />
      <Fab accessibilityLabel="Create" defaultOpen={defaultOpen}>
        <FabAction icon={NotePencilIcon} onPress={() => setLog("New note")}>
          New note
        </FabAction>
        <FabAction icon={CameraIcon} onPress={() => setLog("Take photo")}>
          Take photo
        </FabAction>
        <FabAction icon={ImageIcon} onPress={() => setLog("Add image")}>
          Add image
        </FabAction>
        <FabAction icon={FileTextIcon} onPress={() => setLog("Scan document")}>
          Scan document
        </FabAction>
      </Fab>
    </View>
  )
}

export function FabSpeedDialClosedExample() {
  return (
    <SpeedDial />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabSpeedDialClosedExample: View {
  var body: some View {
    FabSpeedDial(open: false)
  }
}

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}

struct FabSpeedDial: View {
  @State private var open: Bool
  @State private var log = ""

  init(open: Bool) {
    _open = State(initialValue: open)
  }

  var body: some View {
    FabStage(log: log) {
      Fab(accessibilityLabel: "Create", isExpanded: $open) {
        FabAction("New note", action: { log = "New note" }) { Ph.notePencil.regular }
        FabAction("Take photo", action: { log = "Take photo" }) { Ph.camera.regular }
        FabAction("Add image", action: { log = "Add image" }) { Ph.image.regular }
        FabAction("Scan document", action: { log = "Scan document" }) { Ph.fileText.regular }
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Camera
import com.adamglin.phosphoricons.regular.FileText
import com.adamglin.phosphoricons.regular.Image
import com.adamglin.phosphoricons.regular.NotePencil
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.FabAction
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabSpeedDialClosedExample() {
    FabSpeedDial(defaultOpen = false)
}

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}

@Composable
fun FabSpeedDial(defaultOpen: Boolean) {
    var open by rememberSaveable { mutableStateOf(defaultOpen) }
    var log by rememberSaveable { mutableStateOf("") }
    FabPage(log) {
        Fab(PhosphorIcons.Regular.Plus, contentDescription = "Create", open = open, onOpenChange = { open = it }) {
            FabAction(PhosphorIcons.Regular.NotePencil, "New note", { log = "New note" })
            FabAction(PhosphorIcons.Regular.Camera, "Take photo", { log = "Take photo" })
            FabAction(PhosphorIcons.Regular.Image, "Add image", { log = "Add image" })
            FabAction(PhosphorIcons.Regular.FileText, "Scan document", { log = "Scan document" })
        }
    }
}
```

### Controlled

A speed dial controlled with `open` and `onOpenChange`.

![Preview](https://uim.suiss.app/previews/components-fab--controlled.light.webp)

```tsx
import { CameraIcon, NotePencilIcon, PencilSimpleIcon } from "phosphor-react-native"
import * as React from "react"
import { View } from "react-native"
import { Fab, FabAction } from "@/components/ui/fab"
import { Text } from "@/components/ui/text"

function Page({ log }: { log?: string }) {
  return (
    <View className="gap-2">
      <Text variant="h3">Notes</Text>
      <Text variant="muted">
        The button floats at the bottom end of the screen.
      </Text>
      {log ? (
        <Text role="status" className="text-sm text-label-secondary">
          {log}
        </Text>
      ) : null}
    </View>
  )
}

function ControlledDemo() {
  const [open, setOpen] = React.useState(true)
  return (
    <View className="flex-1">
      <Page log={open ? "Open" : "Closed"} />
      <Fab
        icon={PencilSimpleIcon}
        label="Create"
        open={open}
        onOpenChange={setOpen}
      >
        <FabAction icon={NotePencilIcon}>New note</FabAction>
        <FabAction icon={CameraIcon}>Take photo</FabAction>
      </Fab>
    </View>
  )
}

export function FabControlledExample() {
  return (
    <ControlledDemo />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FabPage: View {
  var log: String?

  var body: some View {
    VStack(alignment: .leading, spacing: 8) {
      Text("Notes")
        .textVariant(.h3)
      Text("The button floats at the bottom end of the screen.")
        .textVariant(.muted)
      if let log, !log.isEmpty {
        Text(verbatim: log)
          .textStyle(.sm)
          .foregroundStyle(Color.labelSecondary)
          .accessibilityAddTraits(.updatesFrequently)
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

struct FabStage<Content: View>: View {
  var log: String?
  @ViewBuilder let content: () -> Content

  var body: some View {
    ZStack(alignment: .topLeading) {
      FabPage(log: log)
      content()
    }
    .containerRelativeFrame(.vertical) { height, _ in max(height - 32, 0) }
  }
}

struct FabControlled: View {
  @State private var open = true

  var body: some View {
    FabStage(log: open ? "Open" : "Closed") {
      Fab("Create", isExpanded: $open) {
        Ph.pencilSimple.bold
      } actions: {
        FabAction("New note", action: {}) { Ph.notePencil.regular }
        FabAction("Take photo", action: {}) { Ph.camera.regular }
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Camera
import com.adamglin.phosphoricons.regular.NotePencil
import com.adamglin.phosphoricons.regular.PencilSimple
import com.esuiss.ui.components.Fab
import com.esuiss.ui.components.FabAction
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.TextVariant
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun FabPage(log: String? = null, fab: @Composable () -> Unit) {
    Box(Modifier.fillMaxSize()) {
        Column(
            modifier = Modifier
                .fillMaxWidth()
                .windowInsetsPadding(WindowInsets.safeDrawing)
                .padding(16.dp),
            verticalArrangement = Arrangement.spacedBy(8.dp),
        ) {
            Text("Notes", variant = TextVariant.H3)
            Text("The button floats at the bottom end of the screen.", variant = TextVariant.Muted)
            if (!log.isNullOrEmpty()) {
                Text(
                    log,
                    modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
                    style = Typography.sm.copy(color = EsuissTheme.colors.labelSecondary),
                )
            }
        }
        fab()
    }
}

@Composable
fun FabControlled() {
    var open by rememberSaveable { mutableStateOf(true) }
    FabPage(if (open) "Open" else "Closed") {
        Fab(
            PhosphorIcons.Regular.PencilSimple,
            contentDescription = "Create",
            open = open,
            onOpenChange = { open = it },
            label = "Create",
        ) {
            FabAction(PhosphorIcons.Regular.NotePencil, "New note", {})
            FabAction(PhosphorIcons.Regular.Camera, "Take photo", {})
        }
    }
}
```

## API Reference

### Fab

Floating button that also hosts the speed dial.

### FabAction

One action in the speed dial, with an icon and optional label.

## Accessibility

- The button and each action have the `button` role.
- With actions, the button reports its `expanded` state.
- The VoiceOver escape gesture and the Android back button close the speed dial.
- The scrim is hidden from screen readers.

## Notes

- Position follows the safe-area insets and flips sides in right-to-left layouts.
- Animations respect the system Reduce Motion setting.
- Uses `bg-accent`, `bg-surface-raised` and `bg-scrim` tokens; actions use a secondary surface in dark mode.