1 files changed, 199 insertions, 0 deletions
diff --git a/src/components/Layout/Header/index.tsx b/src/components/Layout/Header/index.tsx
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index 000000000..a35a09537
--- /dev/null
+++ b/src/components/Layout/Header/index.tsx
@@ -0,0 +1,199 @@
+import {createContext, useCallback, useContext} from 'react'
+import {GestureResponderEvent, View} from 'react-native'
+import {msg} from '@lingui/macro'
+import {useLingui} from '@lingui/react'
+import {useNavigation} from '@react-navigation/native'
+
+import {HITSLOP_30} from '#/lib/constants'
+import {NavigationProp} from '#/lib/routes/types'
+import {isIOS} from '#/platform/detection'
+import {useSetDrawerOpen} from '#/state/shell'
+import {
+  atoms as a,
+  platform,
+  TextStyleProp,
+  useBreakpoints,
+  useGutterStyles,
+  useTheme,
+} from '#/alf'
+import {Button, ButtonIcon, ButtonProps} from '#/components/Button'
+import {ArrowLeft_Stroke2_Corner0_Rounded as ArrowLeft} from '#/components/icons/Arrow'
+import {Menu_Stroke2_Corner0_Rounded as Menu} from '#/components/icons/Menu'
+import {
+  BUTTON_VISUAL_ALIGNMENT_OFFSET,
+  HEADER_SLOT_SIZE,
+} from '#/components/Layout/const'
+import {ScrollbarOffsetContext} from '#/components/Layout/context'
+import {Text} from '#/components/Typography'
+
+export function Outer({
+  children,
+  noBottomBorder,
+}: {
+  children: React.ReactNode
+  noBottomBorder?: boolean
+}) {
+  const t = useTheme()
+  const gutter = useGutterStyles()
+  const {gtMobile} = useBreakpoints()
+  const {isWithinOffsetView} = useContext(ScrollbarOffsetContext)
+
+  return (
+    <View
+      style={[
+        a.w_full,
+        !noBottomBorder && a.border_b,
+        a.flex_row,
+        a.align_center,
+        a.gap_sm,
+        gutter,
+        platform({
+          native: [a.pb_sm, a.pt_xs],
+          web: [a.py_sm],
+        }),
+        t.atoms.border_contrast_low,
+        gtMobile && [a.mx_auto, {maxWidth: 600}],
+        !isWithinOffsetView && a.scrollbar_offset,
+      ]}>
+      {children}
+    </View>
+  )
+}
+
+const AlignmentContext = createContext<'platform' | 'left'>('platform')
+
+export function Content({
+  children,
+  align = 'platform',
+}: {
+  children?: React.ReactNode
+  align?: 'platform' | 'left'
+}) {
+  return (
+    <View
+      style={[
+        a.flex_1,
+        a.justify_center,
+        isIOS && align === 'platform' && a.align_center,
+        {minHeight: HEADER_SLOT_SIZE},
+      ]}>
+      <AlignmentContext.Provider value={align}>
+        {children}
+      </AlignmentContext.Provider>
+    </View>
+  )
+}
+
+export function Slot({children}: {children?: React.ReactNode}) {
+  return (
+    <View
+      style={[
+        a.z_50,
+        {
+          width: HEADER_SLOT_SIZE,
+        },
+      ]}>
+      {children}
+    </View>
+  )
+}
+
+export function BackButton({onPress, style, ...props}: Partial<ButtonProps>) {
+  const {_} = useLingui()
+  const navigation = useNavigation<NavigationProp>()
+
+  const onPressBack = useCallback(
+    (evt: GestureResponderEvent) => {
+      onPress?.(evt)
+      if (evt.defaultPrevented) return
+      if (navigation.canGoBack()) {
+        navigation.goBack()
+      } else {
+        navigation.navigate('Home')
+      }
+    },
+    [onPress, navigation],
+  )
+
+  return (
+    <Slot>
+      <Button
+        label={_(msg`Go back`)}
+        size="small"
+        variant="ghost"
+        color="secondary"
+        shape="square"
+        onPress={onPressBack}
+        hitSlop={HITSLOP_30}
+        style={[{marginLeft: -BUTTON_VISUAL_ALIGNMENT_OFFSET}, style]}
+        {...props}>
+        <ButtonIcon icon={ArrowLeft} size="lg" />
+      </Button>
+    </Slot>
+  )
+}
+
+export function MenuButton() {
+  const {_} = useLingui()
+  const setDrawerOpen = useSetDrawerOpen()
+  const {gtMobile} = useBreakpoints()
+
+  const onPress = useCallback(() => {
+    setDrawerOpen(true)
+  }, [setDrawerOpen])
+
+  return gtMobile ? null : (
+    <Slot>
+      <Button
+        label={_(msg`Open drawer menu`)}
+        size="small"
+        variant="ghost"
+        color="secondary"
+        shape="square"
+        onPress={onPress}
+        hitSlop={HITSLOP_30}
+        style={[{marginLeft: -BUTTON_VISUAL_ALIGNMENT_OFFSET}]}>
+        <ButtonIcon icon={Menu} size="lg" />
+      </Button>
+    </Slot>
+  )
+}
+
+export function TitleText({
+  children,
+  style,
+}: {children: React.ReactNode} & TextStyleProp) {
+  const {gtMobile} = useBreakpoints()
+  const align = useContext(AlignmentContext)
+  return (
+    <Text
+      style={[
+        a.text_lg,
+        a.font_heavy,
+        a.leading_tight,
+        isIOS && align === 'platform' && a.text_center,
+        gtMobile && a.text_xl,
+        style,
+      ]}
+      numberOfLines={2}>
+      {children}
+    </Text>
+  )
+}
+
+export function SubtitleText({children}: {children: React.ReactNode}) {
+  const t = useTheme()
+  const align = useContext(AlignmentContext)
+  return (
+    <Text
+      style={[
+        a.text_sm,
+        a.leading_snug,
+        isIOS && align === 'platform' && a.text_center,
+        t.atoms.text_contrast_medium,
+      ]}
+      numberOfLines={2}>
+      {children}
+    </Text>
+  )
+}