# Keypad

A numeric keypad with round digit keys, a delete key and an optional decimal or biometric key.

Keypad 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/keypad

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

```tsx
import * as React from "react"
import { View } from "react-native"
import { Keypad, type KeypadAccessoryKey, type KeypadKeyValue } from "@/components/ui/keypad"
import { Text } from "@/components/ui/text"

function KeyLog({
  accessoryKey,
  disabled,
}: {
  accessoryKey?: KeypadAccessoryKey
  disabled?: boolean
}) {
  const [last, setLast] = React.useState<KeypadKeyValue | null>(null)
  return (
    <View className="items-center gap-6">
      <Text
        role="status"
        accessibilityLiveRegion="polite"
        className="text-sm text-label-secondary"
      >
        {last ? `Last key: ${last}` : "Press a key"}
      </Text>
      <Keypad
        accessoryKey={accessoryKey}
        disabled={disabled}
        onKeyPress={setLast}
      />
    </View>
  )
}

export function KeypadExample() {
  return (
    <KeyLog />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct KeypadExample: View {
  var body: some View {
    KeypadLog(accessory: .none)
  }
}

struct KeypadLog: View {
  let accessory: KeypadAccessory

  @State private var last: KeypadKey?

  var body: some View {
    VStack(spacing: 24) {
      Group {
        if let last {
          Text(verbatim: "Last key: \(name(last))")
        } else {
          Text("Press a key")
        }
      }
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .accessibilityAddTraits(.updatesFrequently)
      Keypad(accessory: accessory) { key in
        last = key
      }
    }
    .frame(maxWidth: .infinity)
  }

  func name(_ key: KeypadKey) -> String {
    switch key {
    case .digit(let value): "\(value)"
    case .decimal: "decimal"
    case .delete: "delete"
    case .biometric: "biometric"
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
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.Alignment
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.esuiss.ui.components.Keypad
import com.esuiss.ui.components.KeypadAccessory
import com.esuiss.ui.components.KeypadKey
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun KeypadExample() {
    KeypadKeyLog(KeypadAccessory.None)
}

fun keypadKeyName(key: KeypadKey): String = when (key) {
    is KeypadKey.Digit -> key.value.toString()
    KeypadKey.Decimal -> "decimal"
    KeypadKey.Biometric -> "biometric"
    KeypadKey.Delete -> "delete"
}

@Composable
fun KeypadKeyLog(accessory: KeypadAccessory, enabled: Boolean = true) {
    var last by rememberSaveable { mutableStateOf<String?>(null) }
    Column(
        modifier = Modifier.fillMaxWidth(),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.spacedBy(24.dp),
    ) {
        Text(
            last?.let { "Last key: $it" } ?: "Press a key",
            modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
            style = Typography.sm,
            color = EsuissTheme.colors.labelSecondary,
        )
        Keypad(onKeyPress = { last = keypadKeyName(it) }, accessory = accessory, enabled = enabled)
    }
}
```

`Keypad` lays out digits 1 to 9 in three rows and a bottom row with an accessory key, `0` and a delete key. Each key is a `KeypadKey`, a round `Pressable` with the `button` role. Digit keys have a filled background; the accessory and delete keys use the `plain` variant with no fill.

Use it for PIN entry, amounts and other numeric input where the system keyboard is not wanted.

## Installation

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

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

```bash title="Terminal"
npx @esuiss/uim@latest add keypad --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-svg
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text).

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

```tsx title="uniwind/components/ui/keypad.tsx"
import { cn } from "cn"
import {
  BackspaceIcon,
  FingerprintIcon,
  type Icon as PhosphorIcon,
} from "phosphor-react-native"
import type * as React from "react"
import { Pressable, View } from "react-native"
import { Icon, IconClassContext } from "@/components/ui/icon"
import { Text, TextClassContext } from "@/components/ui/text"

type KeypadDigit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

type KeypadKeyValue = KeypadDigit | "decimal" | "delete" | "biometric"

type KeypadAccessoryKey = "decimal" | "biometric"

const ROWS: readonly (readonly KeypadDigit[])[] = [
  ["1", "2", "3"],
  ["4", "5", "6"],
  ["7", "8", "9"],
]

function KeypadKey({
  variant = "default",
  disabled,
  className,
  children,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children"> & {
  variant?: "default" | "plain"
  className?: string
  children?: React.ReactNode
}) {
  const contentClassName = disabled ? "text-label-quaternary" : "text-label"
  return (
    <Pressable
      role="button"
      disabled={disabled}
      accessibilityState={{ disabled: !!disabled }}
      className={cn(
        "size-18 items-center justify-center rounded-full",
        variant === "default" &&
          (disabled ? "bg-control-disabled" : "bg-control"),
        !disabled && "active:bg-control-pressed",
        className
      )}
      {...props}
    >
      <TextClassContext.Provider
        value={cn("text-2xl tabular-nums", contentClassName)}
      >
        <IconClassContext.Provider value={cn("size-7", contentClassName)}>
          {children}
        </IconClassContext.Provider>
      </TextClassContext.Provider>
    </Pressable>
  )
}

function Keypad({
  onKeyPress,
  accessoryKey,
  decimalSeparator = ".",
  biometricIcon = FingerprintIcon,
  biometricLabel = "Use biometrics",
  decimalLabel = "Decimal separator",
  deleteLabel = "Delete",
  disabled = false,
  deleteDisabled = false,
  className,
  keyClassName,
  ...props
}: React.ComponentProps<typeof View> & {
  onKeyPress?: (key: KeypadKeyValue) => void
  accessoryKey?: KeypadAccessoryKey
  decimalSeparator?: string
  biometricIcon?: PhosphorIcon
  biometricLabel?: string
  decimalLabel?: string
  deleteLabel?: string
  disabled?: boolean
  deleteDisabled?: boolean
  keyClassName?: string
}) {
  const digit = (value: KeypadDigit) => (
    <KeypadKey
      key={value}
      accessibilityLabel={value}
      disabled={disabled}
      className={keyClassName}
      onPress={() => onKeyPress?.(value)}
    >
      <Text>{value}</Text>
    </KeypadKey>
  )

  return (
    <View className={cn("items-center gap-4", className)} {...props}>
      {ROWS.map((row) => (
        <View key={row.join("")} className="flex-row gap-6">
          {row.map(digit)}
        </View>
      ))}
      <View className="flex-row gap-6">
        {accessoryKey === "decimal" ? (
          <KeypadKey
            variant="plain"
            accessibilityLabel={decimalLabel}
            disabled={disabled}
            className={keyClassName}
            onPress={() => onKeyPress?.("decimal")}
          >
            <Text>{decimalSeparator}</Text>
          </KeypadKey>
        ) : accessoryKey === "biometric" ? (
          <KeypadKey
            variant="plain"
            accessibilityLabel={biometricLabel}
            disabled={disabled}
            className={keyClassName}
            onPress={() => onKeyPress?.("biometric")}
          >
            <Icon as={biometricIcon} />
          </KeypadKey>
        ) : (
          <View className="size-18" />
        )}
        {digit("0")}
        <KeypadKey
          variant="plain"
          accessibilityLabel={deleteLabel}
          disabled={disabled || deleteDisabled}
          className={keyClassName}
          onPress={() => onKeyPress?.("delete")}
        >
          <Icon as={BackspaceIcon} />
        </KeypadKey>
      </View>
    </View>
  )
}

export type { KeypadAccessoryKey, KeypadDigit, KeypadKeyValue }
export { Keypad, KeypadKey }
```

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-svg
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text).

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

```tsx title="nativewind/components/ui/keypad.tsx"
import { cn } from "cn"
import {
  BackspaceIcon,
  FingerprintIcon,
  type Icon as PhosphorIcon,
} from "phosphor-react-native"
import type * as React from "react"
import { Pressable, View } from "react-native"
import { Icon, IconClassContext } from "@/components/ui/icon"
import { Text, TextClassContext } from "@/components/ui/text"

type KeypadDigit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

type KeypadKeyValue = KeypadDigit | "decimal" | "delete" | "biometric"

type KeypadAccessoryKey = "decimal" | "biometric"

const ROWS: readonly (readonly KeypadDigit[])[] = [
  ["1", "2", "3"],
  ["4", "5", "6"],
  ["7", "8", "9"],
]

function KeypadKey({
  variant = "default",
  disabled,
  className,
  children,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children"> & {
  variant?: "default" | "plain"
  className?: string
  children?: React.ReactNode
}) {
  const contentClassName = disabled ? "text-label-quaternary" : "text-label"
  return (
    <Pressable
      role="button"
      disabled={disabled}
      accessibilityState={{ disabled: !!disabled }}
      className={cn(
        "size-[4.5rem] items-center justify-center rounded-full",
        variant === "default" &&
          (disabled ? "bg-control-disabled" : "bg-control"),
        !disabled && "active:bg-control-pressed",
        className
      )}
      {...props}
    >
      <TextClassContext.Provider
        value={cn("text-2xl tabular-nums", contentClassName)}
      >
        <IconClassContext.Provider value={cn("size-7", contentClassName)}>
          {children}
        </IconClassContext.Provider>
      </TextClassContext.Provider>
    </Pressable>
  )
}

function Keypad({
  onKeyPress,
  accessoryKey,
  decimalSeparator = ".",
  biometricIcon = FingerprintIcon,
  biometricLabel = "Use biometrics",
  decimalLabel = "Decimal separator",
  deleteLabel = "Delete",
  disabled = false,
  deleteDisabled = false,
  className,
  keyClassName,
  ...props
}: React.ComponentProps<typeof View> & {
  onKeyPress?: (key: KeypadKeyValue) => void
  accessoryKey?: KeypadAccessoryKey
  decimalSeparator?: string
  biometricIcon?: PhosphorIcon
  biometricLabel?: string
  decimalLabel?: string
  deleteLabel?: string
  disabled?: boolean
  deleteDisabled?: boolean
  keyClassName?: string
}) {
  const digit = (value: KeypadDigit) => (
    <KeypadKey
      key={value}
      accessibilityLabel={value}
      disabled={disabled}
      className={keyClassName}
      onPress={() => onKeyPress?.(value)}
    >
      <Text>{value}</Text>
    </KeypadKey>
  )

  return (
    <View className={cn("items-center gap-4", className)} {...props}>
      {ROWS.map((row) => (
        <View key={row.join("")} className="flex-row gap-6">
          {row.map(digit)}
        </View>
      ))}
      <View className="flex-row gap-6">
        {accessoryKey === "decimal" ? (
          <KeypadKey
            variant="plain"
            accessibilityLabel={decimalLabel}
            disabled={disabled}
            className={keyClassName}
            onPress={() => onKeyPress?.("decimal")}
          >
            <Text>{decimalSeparator}</Text>
          </KeypadKey>
        ) : accessoryKey === "biometric" ? (
          <KeypadKey
            variant="plain"
            accessibilityLabel={biometricLabel}
            disabled={disabled}
            className={keyClassName}
            onPress={() => onKeyPress?.("biometric")}
          >
            <Icon as={biometricIcon} />
          </KeypadKey>
        ) : (
          <View className="size-[4.5rem]" />
        )}
        {digit("0")}
        <KeypadKey
          variant="plain"
          accessibilityLabel={deleteLabel}
          disabled={disabled || deleteDisabled}
          className={keyClassName}
          onPress={() => onKeyPress?.("delete")}
        >
          <Icon as={BackspaceIcon} />
        </KeypadKey>
      </View>
    </View>
  )
}

export type { KeypadAccessoryKey, KeypadDigit, KeypadKeyValue }
export { Keypad, KeypadKey }
```

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-svg
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text).

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

```tsx title="stylesheet/components/ui/keypad.tsx"
import {
  BackspaceIcon,
  FingerprintIcon,
  type Icon as PhosphorIcon,
} from "phosphor-react-native"
import type * as React from "react"
import {
  Pressable,
  type StyleProp,
  StyleSheet,
  View,
  type ViewStyle,
} from "react-native"
import { Icon, IconSizeContext } from "@/components/ui/icon"
import { Text, TextStyleContext } from "@/components/ui/text"
import { fontSize, radius, useTheme } from "@/components/ui/theme"

type KeypadDigit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

type KeypadKeyValue = KeypadDigit | "decimal" | "delete" | "biometric"

type KeypadAccessoryKey = "decimal" | "biometric"

const ROWS: readonly (readonly KeypadDigit[])[] = [
  ["1", "2", "3"],
  ["4", "5", "6"],
  ["7", "8", "9"],
]

const KEY_SIZE = 72

const styles = StyleSheet.create({
  root: { alignItems: "center", gap: 16 },
  row: { flexDirection: "row", gap: 24 },
  key: {
    width: KEY_SIZE,
    height: KEY_SIZE,
    alignItems: "center",
    justifyContent: "center",
    borderRadius: radius.full,
  },
  text: { ...fontSize["2xl"], fontVariant: ["tabular-nums"] },
})

function KeypadKey({
  variant = "default",
  disabled,
  style,
  children,
  ...props
}: Omit<React.ComponentProps<typeof Pressable>, "children" | "style"> & {
  variant?: "default" | "plain"
  style?: StyleProp<ViewStyle>
  children?: React.ReactNode
}) {
  const { colors } = useTheme()
  const color = disabled ? colors.labelQuaternary : colors.label
  return (
    <Pressable
      role="button"
      disabled={disabled}
      accessibilityState={{ disabled: !!disabled }}
      style={({ pressed }) => [
        styles.key,
        {
          backgroundColor:
            pressed && !disabled
              ? colors.controlPressed
              : variant === "plain"
                ? "transparent"
                : disabled
                  ? colors.controlDisabled
                  : colors.control,
        },
        style,
      ]}
      {...props}
    >
      <TextStyleContext.Provider value={{ ...styles.text, color }}>
        <IconSizeContext.Provider value={28}>
          {children}
        </IconSizeContext.Provider>
      </TextStyleContext.Provider>
    </Pressable>
  )
}

function Keypad({
  onKeyPress,
  accessoryKey,
  decimalSeparator = ".",
  biometricIcon = FingerprintIcon,
  biometricLabel = "Use biometrics",
  decimalLabel = "Decimal separator",
  deleteLabel = "Delete",
  disabled = false,
  deleteDisabled = false,
  style,
  keyStyle,
  ...props
}: React.ComponentProps<typeof View> & {
  onKeyPress?: (key: KeypadKeyValue) => void
  accessoryKey?: KeypadAccessoryKey
  decimalSeparator?: string
  biometricIcon?: PhosphorIcon
  biometricLabel?: string
  decimalLabel?: string
  deleteLabel?: string
  disabled?: boolean
  deleteDisabled?: boolean
  keyStyle?: StyleProp<ViewStyle>
}) {
  const digit = (value: KeypadDigit) => (
    <KeypadKey
      key={value}
      accessibilityLabel={value}
      disabled={disabled}
      style={keyStyle}
      onPress={() => onKeyPress?.(value)}
    >
      <Text>{value}</Text>
    </KeypadKey>
  )

  return (
    <View style={[styles.root, style]} {...props}>
      {ROWS.map((row) => (
        <View key={row.join("")} style={styles.row}>
          {row.map(digit)}
        </View>
      ))}
      <View style={styles.row}>
        {accessoryKey === "decimal" ? (
          <KeypadKey
            variant="plain"
            accessibilityLabel={decimalLabel}
            disabled={disabled}
            style={keyStyle}
            onPress={() => onKeyPress?.("decimal")}
          >
            <Text>{decimalSeparator}</Text>
          </KeypadKey>
        ) : accessoryKey === "biometric" ? (
          <KeypadKey
            variant="plain"
            accessibilityLabel={biometricLabel}
            disabled={disabled}
            style={keyStyle}
            onPress={() => onKeyPress?.("biometric")}
          >
            <Icon as={biometricIcon} />
          </KeypadKey>
        ) : (
          <View style={styles.key} />
        )}
        {digit("0")}
        <KeypadKey
          variant="plain"
          accessibilityLabel={deleteLabel}
          disabled={disabled || deleteDisabled}
          style={keyStyle}
          onPress={() => onKeyPress?.("delete")}
        >
          <Icon as={BackspaceIcon} />
        </KeypadKey>
      </View>
    </View>
  )
}

export type { KeypadAccessoryKey, KeypadDigit, KeypadKeyValue }
export { Keypad, KeypadKey }
```

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/Keypad.swift"
import PhosphorSwift
import SwiftUI

public enum KeypadKey: Hashable, Sendable {
  case digit(Int)
  case decimal
  case delete
  case biometric
}

public enum KeypadAccessory {
  case none
  case decimal(String, label: LocalizedStringKey = "Decimal separator")
  case biometric(Image, label: LocalizedStringKey = "Use biometrics")
}

public struct Keypad: View {
  let accessory: KeypadAccessory
  let deleteLabel: LocalizedStringKey
  let canDelete: Bool
  let press: (KeypadKey) -> Bool

  public init(
    accessory: KeypadAccessory = .none,
    deleteLabel: LocalizedStringKey = "Delete",
    deleteDisabled: Bool = false,
    onKeyPress: @escaping (KeypadKey) -> Void
  ) {
    self.accessory = accessory
    self.deleteLabel = deleteLabel
    canDelete = !deleteDisabled
    press = { key in
      onKeyPress(key)
      return true
    }
  }

  init(
    accessory: KeypadAccessory,
    deleteLabel: LocalizedStringKey,
    canDelete: Bool,
    press: @escaping (KeypadKey) -> Bool
  ) {
    self.accessory = accessory
    self.deleteLabel = deleteLabel
    self.canDelete = canDelete
    self.press = press
  }

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

  public var body: some View {
    let size = min(max(72 * scale, 64), 80)
    VStack(spacing: 16) {
      ForEach(0..<3) { row in
        HStack(spacing: 24) {
          ForEach(1..<4) { column in
            digit(row * 3 + column, size: size)
          }
        }
      }
      HStack(spacing: 24) {
        accessoryKey(size: size)
        digit(0, size: size)
        key(.delete, size: size, filled: false) {
          Ph.backspace.regular
            .resizable()
            .frame(width: 28, height: 28)
        }
        .disabled(!canDelete)
        .accessibilityLabel(Text(deleteLabel))
      }
    }
    .accessibilityElement(children: .contain)
  }

  private func digit(_ value: Int, size: CGFloat) -> some View {
    key(.digit(value), size: size, filled: true) {
      Text(verbatim: "\(value)")
        .scaledFont(.xl2)
        .monospacedDigit()
    }
    .accessibilityLabel(Text(verbatim: "\(value)"))
  }

  @ViewBuilder
  private func accessoryKey(size: CGFloat) -> some View {
    switch accessory {
    case .none:
      Color.clear.frame(width: size, height: size)
        .accessibilityHidden(true)
    case .decimal(let separator, let label):
      key(.decimal, size: size, filled: false) {
        Text(verbatim: separator)
          .scaledFont(.xl2)
      }
      .accessibilityLabel(Text(label))
    case .biometric(let icon, let label):
      key(.biometric, size: size, filled: false) {
        icon
          .resizable()
          .frame(width: 28, height: 28)
      }
      .accessibilityLabel(Text(label))
    }
  }

  private func key<Label: View>(
    _ key: KeypadKey,
    size: CGFloat,
    filled: Bool,
    @ViewBuilder label: @escaping () -> Label
  ) -> some View {
    HapticButton(style: PressReader { pressed in
      KeypadFace(pressed: pressed, filled: filled, size: size, label: label)
    }) {
      press(key)
    }
  }
}

private struct KeypadFace<Label: View>: View {
  let pressed: Bool
  let filled: Bool
  let size: CGFloat
  let label: () -> Label

  @Environment(\.isEnabled) private var isEnabled

  var body: some View {
    label()
      .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
      .frame(width: size, height: size)
      .background(fill, in: Circle())
      .contentShape(Circle())
      .animation(.easeOut(duration: 0.12), value: pressed)
  }

  private var fill: Color {
    if pressed { return .controlPressed }
    if !filled { return .clear }
    return isEnabled ? .control : .controlDisabled
  }
}

private struct ShakeModifier: ViewModifier {
  let trigger: Int

  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  func body(content: Content) -> some View {
    let still = reduceMotion
    content.keyframeAnimator(initialValue: CGFloat(0), trigger: trigger) { view, offset in
      view.offset(x: still ? 0 : offset)
    } keyframes: { _ in
      KeyframeTrack {
        LinearKeyframe(-8, duration: 0.08)
        LinearKeyframe(7, duration: 0.08)
        LinearKeyframe(-5, duration: 0.08)
        LinearKeyframe(3, duration: 0.08)
        LinearKeyframe(0, duration: 0.08, timingCurve: .easeOut)
      }
    }
  }
}

extension View {
  func shake(trigger: Int) -> some View {
    modifier(ShakeModifier(trigger: trigger))
  }
}
```

```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/Keypad.kt"
package com.esuiss.ui.components

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.AnimationVector1D
import androidx.compose.animation.core.keyframes
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Backspace
import com.adamglin.phosphoricons.regular.Fingerprint
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

private val KeypadKeySize = 72.dp

private val KeypadColumnGap = 24.dp

private val KeypadRowGap = 16.dp

private val KeypadRows = listOf(listOf(1, 2, 3), listOf(4, 5, 6), listOf(7, 8, 9))

sealed interface KeypadKey {
    data class Digit(val value: Int) : KeypadKey

    data object Decimal : KeypadKey

    data object Biometric : KeypadKey

    data object Delete : KeypadKey
}

sealed interface KeypadAccessory {
    data object None : KeypadAccessory

    data class Decimal(
        val separator: String = ".",
        val label: String = "Decimal separator",
    ) : KeypadAccessory

    data class Biometric(
        val icon: ImageVector = PhosphorIcons.Regular.Fingerprint,
        val label: String = "Use biometrics",
    ) : KeypadAccessory
}

@Composable
fun Keypad(
    onKeyPress: (KeypadKey) -> Unit,
    modifier: Modifier = Modifier,
    accessory: KeypadAccessory = KeypadAccessory.None,
    deleteLabel: String = "Delete",
    enabled: Boolean = true,
) {
    Column(
        modifier = modifier,
        verticalArrangement = Arrangement.spacedBy(KeypadRowGap),
        horizontalAlignment = Alignment.CenterHorizontally,
    ) {
        KeypadRows.forEach { row ->
            Row(horizontalArrangement = Arrangement.spacedBy(KeypadColumnGap)) {
                row.forEach { digit -> KeypadDigit(digit, enabled, onKeyPress) }
            }
        }
        Row(horizontalArrangement = Arrangement.spacedBy(KeypadColumnGap)) {
            when (accessory) {
                KeypadAccessory.None -> Box(Modifier.size(KeypadKeySize))
                is KeypadAccessory.Decimal -> KeypadButton(
                    onClick = { onKeyPress(KeypadKey.Decimal) },
                    enabled = enabled,
                    filled = true,
                    contentDescription = accessory.label,
                ) {
                    KeypadText(accessory.separator)
                }
                is KeypadAccessory.Biometric -> KeypadButton(
                    onClick = { onKeyPress(KeypadKey.Biometric) },
                    enabled = enabled,
                    filled = false,
                    contentDescription = accessory.label,
                ) {
                    Icon(accessory.icon, contentDescription = null, size = 32.dp)
                }
            }
            KeypadDigit(0, enabled, onKeyPress)
            KeypadButton(
                onClick = { onKeyPress(KeypadKey.Delete) },
                enabled = enabled,
                filled = false,
                contentDescription = deleteLabel,
            ) {
                Icon(PhosphorIcons.Regular.Backspace, contentDescription = null, size = 28.dp)
            }
        }
    }
}

@Composable
private fun KeypadDigit(digit: Int, enabled: Boolean, onKeyPress: (KeypadKey) -> Unit) {
    KeypadButton(onClick = { onKeyPress(KeypadKey.Digit(digit)) }, enabled = enabled, filled = true) {
        KeypadText(digit.toString())
    }
}

@Composable
private fun KeypadText(text: String) {
    BasicText(
        text,
        style = Typography.xl2.copy(
            color = LocalContentColor.current,
            fontWeight = FontWeight.Medium,
            fontFeatureSettings = "tnum",
        ),
    )
}

@Composable
private fun KeypadButton(
    onClick: () -> Unit,
    enabled: Boolean,
    filled: Boolean,
    contentDescription: String? = null,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    val haptics = rememberHaptics()
    val background = when {
        !enabled -> if (filled) colors.controlDisabled else Color.Transparent
        pressed -> colors.controlPressed
        filled -> colors.control
        else -> Color.Transparent
    }
    val foreground = if (enabled) colors.label else colors.labelQuaternary
    Box(
        modifier = Modifier
            .size(KeypadKeySize)
            .clip(CircleShape)
            .background(background, CircleShape)
            .clickable(
                interactionSource = interaction,
                indication = null,
                enabled = enabled,
                role = Role.Button,
            ) {
                haptics.selection()
                onClick()
            }
            .then(
                if (contentDescription != null) {
                    Modifier.semantics { this.contentDescription = contentDescription }
                } else {
                    Modifier
                },
            ),
        contentAlignment = Alignment.Center,
    ) {
        CompositionLocalProvider(LocalContentColor provides foreground) {
            content()
        }
    }
}

internal suspend fun Animatable<Float, AnimationVector1D>.shake() {
    snapTo(0f)
    animateTo(
        0f,
        keyframes {
            durationMillis = 400
            -8f at 60
            7f at 140
            -5f at 220
            3f at 300
            0f at 400
        },
    )
}
```

```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/Haptics.kt"
package com.esuiss.ui.components

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

val LocalHapticsEnabled = staticCompositionLocalOf { true }

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

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

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

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

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

```kt title="kotlin/components/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 { KeypadKey, Keypad } from "@/components/ui/keypad"
```

```tsx
<KeyLog />
```

Handle input in `onKeyPress`, which receives a digit string (`"0"` to `"9"`), `"decimal"`, `"delete"` or `"biometric"`. The keypad holds no value of its own.

Set `accessoryKey` to `decimal` or `biometric` to fill the bottom-left slot; otherwise it stays empty. Change the decimal character with `decimalSeparator` and the biometric icon with `biometricIcon`.

Use `deleteDisabled` to turn off only the delete key, for example when the value is empty. `KeypadKey` is exported for custom layouts, along with the `KeypadDigit`, `KeypadKeyValue` and `KeypadAccessoryKey` types.

## Examples

### Decimal

A keypad with a decimal separator key.

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

```tsx
import * as React from "react"
import { View } from "react-native"
import { Keypad, type KeypadAccessoryKey, type KeypadKeyValue } from "@/components/ui/keypad"
import { Text } from "@/components/ui/text"

function KeyLog({
  accessoryKey,
  disabled,
}: {
  accessoryKey?: KeypadAccessoryKey
  disabled?: boolean
}) {
  const [last, setLast] = React.useState<KeypadKeyValue | null>(null)
  return (
    <View className="items-center gap-6">
      <Text
        role="status"
        accessibilityLiveRegion="polite"
        className="text-sm text-label-secondary"
      >
        {last ? `Last key: ${last}` : "Press a key"}
      </Text>
      <Keypad
        accessoryKey={accessoryKey}
        disabled={disabled}
        onKeyPress={setLast}
      />
    </View>
  )
}

export function KeypadDecimalExample() {
  return (
    <KeyLog accessoryKey="decimal" />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct KeypadDecimalExample: View {
  var body: some View {
    KeypadLog(accessory: .decimal("."))
  }
}

struct KeypadLog: View {
  let accessory: KeypadAccessory

  @State private var last: KeypadKey?

  var body: some View {
    VStack(spacing: 24) {
      Group {
        if let last {
          Text(verbatim: "Last key: \(name(last))")
        } else {
          Text("Press a key")
        }
      }
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .accessibilityAddTraits(.updatesFrequently)
      Keypad(accessory: accessory) { key in
        last = key
      }
    }
    .frame(maxWidth: .infinity)
  }

  func name(_ key: KeypadKey) -> String {
    switch key {
    case .digit(let value): "\(value)"
    case .decimal: "decimal"
    case .delete: "delete"
    case .biometric: "biometric"
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
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.Alignment
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.esuiss.ui.components.Keypad
import com.esuiss.ui.components.KeypadAccessory
import com.esuiss.ui.components.KeypadKey
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun KeypadDecimalExample() {
    KeypadKeyLog(KeypadAccessory.Decimal())
}

fun keypadKeyName(key: KeypadKey): String = when (key) {
    is KeypadKey.Digit -> key.value.toString()
    KeypadKey.Decimal -> "decimal"
    KeypadKey.Biometric -> "biometric"
    KeypadKey.Delete -> "delete"
}

@Composable
fun KeypadKeyLog(accessory: KeypadAccessory, enabled: Boolean = true) {
    var last by rememberSaveable { mutableStateOf<String?>(null) }
    Column(
        modifier = Modifier.fillMaxWidth(),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.spacedBy(24.dp),
    ) {
        Text(
            last?.let { "Last key: $it" } ?: "Press a key",
            modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
            style = Typography.sm,
            color = EsuissTheme.colors.labelSecondary,
        )
        Keypad(onKeyPress = { last = keypadKeyName(it) }, accessory = accessory, enabled = enabled)
    }
}
```

### Biometric

A keypad with a biometric key.

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

```tsx
import * as React from "react"
import { View } from "react-native"
import { Keypad, type KeypadAccessoryKey, type KeypadKeyValue } from "@/components/ui/keypad"
import { Text } from "@/components/ui/text"

function KeyLog({
  accessoryKey,
  disabled,
}: {
  accessoryKey?: KeypadAccessoryKey
  disabled?: boolean
}) {
  const [last, setLast] = React.useState<KeypadKeyValue | null>(null)
  return (
    <View className="items-center gap-6">
      <Text
        role="status"
        accessibilityLiveRegion="polite"
        className="text-sm text-label-secondary"
      >
        {last ? `Last key: ${last}` : "Press a key"}
      </Text>
      <Keypad
        accessoryKey={accessoryKey}
        disabled={disabled}
        onKeyPress={setLast}
      />
    </View>
  )
}

export function KeypadBiometricExample() {
  return (
    <KeyLog accessoryKey="biometric" />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct KeypadBiometricExample: View {
  var body: some View {
    KeypadLog(accessory: .biometric(Ph.fingerprint.regular))
  }
}

struct KeypadLog: View {
  let accessory: KeypadAccessory

  @State private var last: KeypadKey?

  var body: some View {
    VStack(spacing: 24) {
      Group {
        if let last {
          Text(verbatim: "Last key: \(name(last))")
        } else {
          Text("Press a key")
        }
      }
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .accessibilityAddTraits(.updatesFrequently)
      Keypad(accessory: accessory) { key in
        last = key
      }
    }
    .frame(maxWidth: .infinity)
  }

  func name(_ key: KeypadKey) -> String {
    switch key {
    case .digit(let value): "\(value)"
    case .decimal: "decimal"
    case .delete: "delete"
    case .biometric: "biometric"
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
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.Alignment
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.esuiss.ui.components.Keypad
import com.esuiss.ui.components.KeypadAccessory
import com.esuiss.ui.components.KeypadKey
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun KeypadBiometricExample() {
    KeypadKeyLog(KeypadAccessory.Biometric())
}

fun keypadKeyName(key: KeypadKey): String = when (key) {
    is KeypadKey.Digit -> key.value.toString()
    KeypadKey.Decimal -> "decimal"
    KeypadKey.Biometric -> "biometric"
    KeypadKey.Delete -> "delete"
}

@Composable
fun KeypadKeyLog(accessory: KeypadAccessory, enabled: Boolean = true) {
    var last by rememberSaveable { mutableStateOf<String?>(null) }
    Column(
        modifier = Modifier.fillMaxWidth(),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.spacedBy(24.dp),
    ) {
        Text(
            last?.let { "Last key: $it" } ?: "Press a key",
            modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
            style = Typography.sm,
            color = EsuissTheme.colors.labelSecondary,
        )
        Keypad(onKeyPress = { last = keypadKeyName(it) }, accessory = accessory, enabled = enabled)
    }
}
```

### Disabled

A fully disabled keypad.

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

```tsx
import * as React from "react"
import { View } from "react-native"
import { Keypad, type KeypadAccessoryKey, type KeypadKeyValue } from "@/components/ui/keypad"
import { Text } from "@/components/ui/text"

function KeyLog({
  accessoryKey,
  disabled,
}: {
  accessoryKey?: KeypadAccessoryKey
  disabled?: boolean
}) {
  const [last, setLast] = React.useState<KeypadKeyValue | null>(null)
  return (
    <View className="items-center gap-6">
      <Text
        role="status"
        accessibilityLiveRegion="polite"
        className="text-sm text-label-secondary"
      >
        {last ? `Last key: ${last}` : "Press a key"}
      </Text>
      <Keypad
        accessoryKey={accessoryKey}
        disabled={disabled}
        onKeyPress={setLast}
      />
    </View>
  )
}

export function KeypadDisabledExample() {
  return (
    <KeyLog accessoryKey="biometric" disabled />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct KeypadDisabledExample: View {
  var body: some View {
    KeypadLog(accessory: .biometric(Ph.fingerprint.regular))
      .disabled(true)
  }
}

struct KeypadLog: View {
  let accessory: KeypadAccessory

  @State private var last: KeypadKey?

  var body: some View {
    VStack(spacing: 24) {
      Group {
        if let last {
          Text(verbatim: "Last key: \(name(last))")
        } else {
          Text("Press a key")
        }
      }
      .textStyle(.sm)
      .foregroundStyle(Color.labelSecondary)
      .accessibilityAddTraits(.updatesFrequently)
      Keypad(accessory: accessory) { key in
        last = key
      }
    }
    .frame(maxWidth: .infinity)
  }

  func name(_ key: KeypadKey) -> String {
    switch key {
    case .digit(let value): "\(value)"
    case .decimal: "decimal"
    case .delete: "delete"
    case .biometric: "biometric"
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
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.Alignment
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.esuiss.ui.components.Keypad
import com.esuiss.ui.components.KeypadAccessory
import com.esuiss.ui.components.KeypadKey
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun KeypadDisabledExample() {
    KeypadKeyLog(KeypadAccessory.Biometric(), enabled = false)
}

fun keypadKeyName(key: KeypadKey): String = when (key) {
    is KeypadKey.Digit -> key.value.toString()
    KeypadKey.Decimal -> "decimal"
    KeypadKey.Biometric -> "biometric"
    KeypadKey.Delete -> "delete"
}

@Composable
fun KeypadKeyLog(accessory: KeypadAccessory, enabled: Boolean = true) {
    var last by rememberSaveable { mutableStateOf<String?>(null) }
    Column(
        modifier = Modifier.fillMaxWidth(),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.spacedBy(24.dp),
    ) {
        Text(
            last?.let { "Last key: $it" } ?: "Press a key",
            modifier = Modifier.semantics { liveRegion = LiveRegionMode.Polite },
            style = Typography.sm,
            color = EsuissTheme.colors.labelSecondary,
        )
        Keypad(onKeyPress = { last = keypadKeyName(it) }, accessory = accessory, enabled = enabled)
    }
}
```

## API Reference

### KeypadKey

A single round key that passes text and icon styles to its children.

### Keypad

The full grid of keys.

## Accessibility

- Every key has the `button` role and an `accessibilityLabel`: the digit itself, or `decimalLabel`, `biometricLabel` and `deleteLabel` for the other keys.
- Disabled keys set `disabled` in their accessibility state and block presses.
- Translate the default labels (`Decimal separator`, `Use biometrics`, `Delete`) for localized apps.

## Notes

- Filled keys use `bg-control`, `bg-control-pressed` when pressed and `bg-control-disabled` when disabled.
- Digits use `text-2xl` with tabular numbers.
- Light and dark colors follow the system appearance.