Add ActorLabel

package.json

@@ -165,6 +165,7 @@
     "react-avatar-editor": "^13.0.0",
     "react-compiler-runtime": "file:./lib/react-compiler-runtime",
     "react-dom": "^18.2.0",
+    "react-error-boundary": "^4.0.13",
     "react-keyed-flatten-children": "^3.0.0",
     "react-native": "0.74.1",
     "react-native-compressor": "^1.8.24",

src/Navigation.tsx

@@ -65,6 +65,7 @@ import {
 import {AccessibilitySettingsScreen} from './view/screens/AccessibilitySettings'
 import {CommunityGuidelinesScreen} from './view/screens/CommunityGuidelines'
 import {CopyrightPolicyScreen} from './view/screens/CopyrightPolicy'
+import {DebugAppcomScreen} from './view/screens/DebugAppcom'
 import {DebugModScreen} from './view/screens/DebugMod'
 import {FeedsScreen} from './view/screens/Feeds'
 import {HomeScreen} from './view/screens/Home'
@@ -233,6 +234,11 @@ function commonScreens(Stack: typeof HomeTab, unreadCountLabel?: string) {
         getComponent={() => DebugModScreen}
         options={{title: title(msg`Moderation states`), requireAuth: true}}
       />
+      <Stack.Screen
+        name="DebugAppcom"
+        getComponent={() => DebugAppcomScreen}
+        options={{title: title(msg`Application components`), requireAuth: true}}
+      />
       <Stack.Screen
         name="Log"
         getComponent={() => LogScreen}

src/components/appcom/AppCom.tsx

@@ -0,0 +1,43 @@
+import React from 'react'
+import {View} from 'react-native'
+
+import {atoms as a, useTheme} from '#/alf'
+import {Text} from '../Typography'
+import type {AppComNode} from './types'
+import {AppComponent} from './vocabulary'
+
+export function AppComponentRegion({
+  tree,
+  origin,
+}: {
+  tree: AppComNode
+  origin: string
+}) {
+  const t = useTheme()
+  return (
+    <View style={[a.border, t.atoms.border_contrast_medium, a.rounded_sm]}>
+      <View
+        style={[
+          t.atoms.bg_contrast_25,
+          a.px_md,
+          a.py_sm,
+          {
+            borderTopLeftRadius: a.rounded_sm.borderRadius,
+            borderTopRightRadius: a.rounded_sm.borderRadius,
+          },
+        ]}>
+        <Text
+          style={[
+            t.atoms.text_contrast_medium,
+            a.text_xs,
+            {fontFamily: 'monospace'},
+          ]}>
+          {origin}
+        </Text>
+      </View>
+      <View style={[a.px_md, a.py_lg]}>
+        <AppComponent node={tree} />
+      </View>
+    </View>
+  )
+}

src/components/appcom/types.ts

@@ -0,0 +1,6 @@
+export interface AppComNode {
+  type: string
+  key?: string
+  props?: Record<string, any>
+  children?: Array<AppComNode>
+}

src/components/appcom/vocabulary/ActorLabel.tsx

@@ -0,0 +1,54 @@
+import React from 'react'
+import {AtUri} from '@atproto/api'
+import {z} from 'zod'
+
+import {useProfileQuery} from '#/state/queries/profile'
+import {useResolveDidQuery} from '#/state/queries/resolve-uri'
+import {color} from './common'
+import {Label} from './Label'
+
+const actorLabelProps = z.object({
+  uri: z.string(),
+  field: z.enum(['handle', 'displayName', 'description']),
+  color,
+  size: z
+    .number()
+    .positive()
+    .default(16)
+    .transform(v => ({fontSize: v})),
+  lineHeight: z
+    .number()
+    .positive()
+    .default(1)
+    .transform(v => ({lineHeight: v})),
+  weight: z
+    .enum(['normal', 'semibold', 'bold'])
+    .default('normal')
+    .transform(v => ({fontWeight: v})),
+})
+
+export type ActorLabelProps = z.infer<typeof actorLabelProps>
+
+export function ActorLabel(props: React.PropsWithChildren<ActorLabelProps>) {
+  const propsParsed = actorLabelProps.parse(props)
+  const urip = new AtUri(propsParsed.uri)
+
+  const {data: did} = useResolveDidQuery(urip.host)
+  const {data: profile} = useProfileQuery({did})
+
+  let text = ''
+  if (profile) {
+    if (props.field === 'handle') {
+      text = profile.handle
+    }
+    if (props.field === 'displayName') {
+      text = profile.displayName || profile.handle
+    }
+    if (props.field === 'description') {
+      text = profile.description || ''
+    }
+  }
+
+  // TODO loading, error
+  return <Label {...props} text={text} />
+}

src/components/appcom/vocabulary/Avatar.tsx

@@ -0,0 +1,24 @@
+import React from 'react'
+import {AtUri} from '@atproto/api'
+import {z} from 'zod'
+
+import {useProfileQuery} from '#/state/queries/profile'
+import {useResolveDidQuery} from '#/state/queries/resolve-uri'
+import {UserAvatar} from '#/view/com/util/UserAvatar'
+
+const avatarProps = z.object({
+  uri: z.string(),
+  size: z.number().default(50),
+})
+
+export type AvatarProps = z.infer<typeof avatarProps>
+
+export function Avatar(props: React.PropsWithChildren<AvatarProps>) {
+  const propsParsed = avatarProps.parse(props)
+  const urip = new AtUri(propsParsed.uri)
+
+  const {data: did} = useResolveDidQuery(urip.host)
+  const {data: profile} = useProfileQuery({did})
+
+  return <UserAvatar avatar={profile?.avatar} size={propsParsed.size} />
+}

src/components/appcom/vocabulary/Box.tsx

@@ -0,0 +1,71 @@
+import React from 'react'
+import {View} from 'react-native'
+import {z} from 'zod'
+
+import {pad} from './common'
+import {useBackgroundColor, useBorderColor} from './hooks'
+
+const boxProps = z.object({
+  pad,
+
+  corner: z
+    .union([
+      z
+        .number()
+        .positive()
+        .transform(v => ({borderRadius: v})),
+      z
+        .object({
+          tl: z.number().positive().optional(),
+          tr: z.number().positive().optional(),
+          bl: z.number().positive().optional(),
+          br: z.number().positive().optional(),
+        })
+        .transform(obj => ({
+          borderTopLeftRadius: obj.tl,
+          borderTopRightRadius: obj.tr,
+          borderBottomLeftRadius: obj.bl,
+          borderBottomRightRadius: obj.br,
+        })),
+    ])
+    .optional(),
+
+  background: z
+    .enum([
+      'default',
+      'primary',
+      'secondary',
+      'positive',
+      'negative',
+      'inverted',
+      'none',
+    ])
+    .optional(),
+
+  border: z
+    .enum([
+      'default',
+      'primary',
+      'secondary',
+      'positive',
+      'negative',
+      'inverted',
+      'none',
+    ])
+    .optional(),
+})
+
+export type BoxProps = z.infer<typeof boxProps>
+
+export function Box(props: React.PropsWithChildren<BoxProps>) {
+  const styles = boxProps.parse(props)
+
+  const backgroundColor = useBackgroundColor(styles.background)
+  const borderColor = useBorderColor(styles.border)
+
+  return (
+    <View style={[styles.pad, styles.corner, backgroundColor, borderColor]}>
+      {props.children}
+    </View>
+  )
+}

src/components/appcom/vocabulary/Embed.tsx

@@ -0,0 +1,58 @@
+import React from 'react'
+import {View} from 'react-native'
+import {AtUri} from '@atproto/api'
+import {z} from 'zod'
+
+import {usePostQuery} from '#/state/queries/post'
+import {useProfileQuery} from '#/state/queries/profile'
+import {useResolveDidQuery} from '#/state/queries/resolve-uri'
+import {Post as PostInner} from '#/view/com/post/Post'
+import {ProfileCardWithFollowBtn} from '#/view/com/profile/ProfileCard'
+import {Text} from '#/components/Typography'
+
+const embedProps = z.object({
+  uri: z.string(),
+})
+
+export type EmbedProps = z.infer<typeof embedProps>
+
+export function Embed(props: React.PropsWithChildren<EmbedProps>) {
+  const propsParsed = embedProps.parse(props)
+  const urip = new AtUri(propsParsed.uri)
+
+  if (!urip.pathname || urip.pathname === '/') {
+    return <Actor actor={urip.host} />
+  }
+  if (urip.collection === 'app.bsky.feed.post') {
+    return <Post uri={urip.toString()} />
+  }
+  return <Unknown urip={urip} />
+}
+
+function Actor({actor}: {actor: string}) {
+  const {data: did} = useResolveDidQuery(actor)
+  const {data: profile} = useProfileQuery({did})
+
+  if (profile) {
+    return <ProfileCardWithFollowBtn noBg noBorder profile={profile} />
+  }
+  // TODO error, loading
+  return <View />
+}
+
+function Post({uri}: {uri: string}) {
+  const {data: post} = usePostQuery(uri)
+  if (post) {
+    return <PostInner post={post} hideTopBorder />
+  }
+  // TODO error, loading
+  return <View />
+}
+
+function Unknown({urip}: {urip: AtUri}) {
+  return (
+    <View style={{paddingVertical: 10, paddingHorizontal: 15}}>
+      <Text>Unsupported record type: {urip.collection}</Text>
+    </View>
+  )
+}

src/components/appcom/vocabulary/Expandable.tsx

@@ -0,0 +1,58 @@
+import React from 'react'
+import {View} from 'react-native'
+import {z} from 'zod'
+
+import {atoms as a, useTheme} from '#/alf'
+import {Button} from '#/components/Button'
+import {
+  ChevronBottom_Stroke2_Corner0_Rounded as ChevronBottom,
+  ChevronRight_Stroke2_Corner0_Rounded as ChevronRight,
+} from '#/components/icons/Chevron'
+import {Text} from '#/components/Typography'
+
+const expandableProps = z.object({
+  label: z.string(),
+  defaultExpanded: z.boolean().default(false),
+})
+
+export type ExpandableProps = z.infer<typeof expandableProps>
+
+export function Expandable(props: React.PropsWithChildren<ExpandableProps>) {
+  const t = useTheme()
+
+  const propsParsed = expandableProps.parse(props)
+  const [expanded, setExpanded] = React.useState(propsParsed.defaultExpanded)
+
+  return (
+    <View>
+      <Button onPress={() => setExpanded(v => !v)} label={propsParsed.label}>
+        {({hovered}) => (
+          <View
+            style={[
+              a.flex_1,
+              a.flex_row,
+              a.align_center,
+              a.gap_sm,
+              a.px_md,
+              a.py_md,
+              a.rounded_xs,
+              hovered && t.atoms.bg_contrast_25,
+            ]}>
+            {expanded ? (
+              <ChevronBottom
+                width={14}
+                fill={t.atoms.text_contrast_low.color}
+              />
+            ) : (
+              <ChevronRight width={14} fill={t.atoms.text_contrast_low.color} />
+            )}
+            <Text style={[t.atoms.text, a.text_md]}>{props.label}</Text>
+          </View>
+        )}
+      </Button>
+      <View style={{display: expanded ? 'flex' : 'none'}}>
+        {props.children}
+      </View>
+    </View>
+  )
+}

src/components/appcom/vocabulary/Label.tsx

@@ -0,0 +1,37 @@
+import React from 'react'
+import {z} from 'zod'
+
+import {Text} from '#/components/Typography'
+import {color} from './common'
+import {useFontColor} from './hooks'
+
+export const labelProps = z.object({
+  text: z.string(),
+  color,
+  size: z
+    .number()
+    .positive()
+    .default(16)
+    .transform(v => ({fontSize: v})),
+  lineHeight: z
+    .number()
+    .positive()
+    .default(1)
+    .transform(v => ({lineHeight: v})),
+  weight: z
+    .enum(['normal', 'semibold', 'bold'])
+    .default('normal')
+    .transform(v => ({fontWeight: v})),
+})
+
+export type LabelProps = z.infer<typeof labelProps>
+
+export function Label(props: React.PropsWithChildren<LabelProps>) {
+  const styles = labelProps.parse(props)
+  const fontColor = useFontColor(styles.color)
+  return (
+    <Text style={[fontColor, styles.size, styles.lineHeight, styles.weight]}>
+      {props.text}
+    </Text>
+  )
+}

src/components/appcom/vocabulary/Stack.tsx

@@ -0,0 +1,67 @@
+import React from 'react'
+import {FlexAlignType, FlexStyle, View} from 'react-native'
+import {z} from 'zod'
+
+import {gap, pad} from './common'
+
+const stackProps = z.object({
+  gap,
+  pad,
+
+  direction: z
+    .enum(['row', 'column'])
+    .default('column')
+    .transform(v => ({flexDirection: v})),
+
+  align: z
+    .enum(['start', 'center', 'end', 'stretch'])
+    .default('stretch')
+    .transform(v => {
+      if (v === 'start') {
+        return {alignItems: 'flex-start' as FlexAlignType}
+      }
+      if (v === 'end') {
+        return {alignItems: 'flex-end' as FlexAlignType}
+      }
+      return {alignItems: v as FlexAlignType}
+    }),
+
+  justify: z
+    .enum([
+      'start',
+      'center',
+      'end',
+      'space-between',
+      'space-around',
+      'space-evenly',
+    ])
+    .default('start')
+    .transform(v => {
+      if (v === 'start') {
+        return {justifyContent: 'flex-start' as FlexStyle['justifyContent']}
+      }
+      if (v === 'end') {
+        return {justifyContent: 'flex-end' as FlexStyle['justifyContent']}
+      }
+      return {justifyContent: v as FlexStyle['justifyContent']}
+    }),
+})
+
+export type StackProps = z.infer<typeof stackProps>
+
+export function Stack(props: React.PropsWithChildren<StackProps>) {
+  const styles = stackProps.parse(props)
+  return (
+    <View
+      style={[
+        {flexWrap: 'nowrap'},
+        styles.direction,
+        styles.align,
+        styles.justify,
+        styles.gap,
+        styles.pad,
+      ]}>
+      {props.children}
+    </View>
+  )
+}

src/components/appcom/vocabulary/Tabs.tsx

@@ -0,0 +1,68 @@
+import React from 'react'
+import {View} from 'react-native'
+import {z} from 'zod'
+
+import {atoms as a, useTheme} from '#/alf'
+import {Button} from '#/components/Button'
+import {Text} from '#/components/Typography'
+
+const tabsProps = z.object({
+  labels: z.array(z.string()),
+})
+
+export type TabsProps = z.infer<typeof tabsProps>
+
+export function Tabs(props: React.PropsWithChildren<TabsProps>) {
+  const t = useTheme()
+
+  const [selected, setSelected] = React.useState(0)
+  const propsParsed = tabsProps.parse(props)
+
+  return (
+    <View>
+      <View style={[a.flex_row]}>
+        {propsParsed.labels.map((label, i) => (
+          <Button
+            key={`${i}-${label}`}
+            onPress={() => setSelected(i)}
+            label={label}>
+            {({hovered}) => (
+              <View
+                style={[
+                  a.px_lg,
+                  a.py_md,
+                  a.border_b,
+                  hovered && t.atoms.bg_contrast_25,
+                  {
+                    borderColor:
+                      hovered || selected === i
+                        ? t.palette.black
+                        : 'transparent',
+                  },
+                ]}>
+                <Text style={[t.atoms.text, a.text_md]}>{label}</Text>
+              </View>
+            )}
+          </Button>
+        ))}
+      </View>
+      {arr(props.children).map((child, i) => (
+        <View
+          key={`tab-content-${i}`}
+          style={{display: i === selected ? 'flex' : 'none'}}>
+          {child}
+        </View>
+      ))}
+    </View>
+  )
+}
+
+function arr(v: any): Array<any> {
+  if (Array.isArray(v)) {
+    return v
+  }
+  if (!v) {
+    return []
+  }
+  return [v]
+}

src/components/appcom/vocabulary/common.ts

@@ -0,0 +1,36 @@
+import {z} from 'zod'
+
+export const gap = z
+  .number()
+  .optional()
+  .transform(v => ({gap: v}))
+
+export const pad = z
+  .union([
+    z
+      .number()
+      .positive()
+      .transform(v => ({padding: v})),
+    z
+      .object({
+        x: z.number().positive().optional(),
+        y: z.number().positive().optional(),
+        t: z.number().positive().optional(),
+        b: z.number().positive().optional(),
+        l: z.number().positive().optional(),
+        r: z.number().positive().optional(),
+      })
+      .transform(obj => ({
+        paddingHorizontal: obj.x,
+        paddingVertical: obj.y,
+        paddingTop: obj.t,
+        paddingBottom: obj.b,
+        paddingLeft: obj.l,
+        paddingRight: obj.r,
+      })),
+  ])
+  .optional()
+
+export const color = z
+  .enum(['default', 'primary', 'secondary', 'positive', 'negative', 'inverted'])
+  .default('default')

src/components/appcom/vocabulary/hooks.ts

@@ -0,0 +1,66 @@
+import {useTheme} from '#/alf'
+
+export function useBackgroundColor(value: string | undefined) {
+  const t = useTheme()
+
+  let background
+  if (value === 'default') {
+    background = t.atoms.bg
+  } else if (value === 'primary') {
+    background = {backgroundColor: t.palette.primary_500}
+  } else if (value === 'secondary') {
+    background = t.atoms.bg_contrast_100
+  } else if (value === 'positive') {
+    background = {backgroundColor: t.palette.positive_500}
+  } else if (value === 'negative') {
+    background = {backgroundColor: t.palette.negative_500}
+  } else if (value === 'inverted') {
+    background = t.atoms.bg_contrast_950
+  }
+  return background
+}
+
+export function useBorderColor(value: string | undefined) {
+  const t = useTheme()
+
+  let borderColor
+  if (value === 'default') {
+    borderColor = {
+      borderWidth: 1,
+      borderColor: t.atoms.border_contrast_medium.borderColor,
+    }
+  } else if (value === 'primary') {
+    borderColor = {borderWidth: 1, borderColor: t.palette.primary_500}
+  } else if (value === 'secondary') {
+    borderColor = {
+      borderWidth: 1,
+      borderColor: t.atoms.border_contrast_low.borderColor,
+    }
+  } else if (value === 'positive') {
+    borderColor = {borderWidth: 1, borderColor: t.palette.positive_500}
+  } else if (value === 'negative') {
+    borderColor = {borderWidth: 1, borderColor: t.palette.negative_500}
+  }
+
+  return borderColor
+}
+
+export function useFontColor(value: string | undefined) {
+  const t = useTheme()
+
+  let fontColor
+  if (value === 'default') {
+    fontColor = t.atoms.text
+  } else if (value === 'primary') {
+    fontColor = {color: t.palette.primary_500}
+  } else if (value === 'secondary') {
+    fontColor = t.atoms.text_contrast_medium
+  } else if (value === 'positive') {
+    fontColor = {color: t.palette.positive_500}
+  } else if (value === 'negative') {
+    fontColor = {color: t.palette.negative_500}
+  } else if (value === 'inverted') {
+    fontColor = {color: t.atoms.bg.backgroundColor}
+  }
+  return fontColor
+}

src/components/appcom/vocabulary/index.tsx

@@ -0,0 +1,56 @@
+import React from 'react'
+import {View} from 'react-native'
+import {ErrorBoundary} from 'react-error-boundary'
+import {ZodError} from 'zod'
+
+import {Text} from '#/components/Typography'
+import type {AppComNode} from '../types'
+import {ActorLabel} from './ActorLabel'
+import {Avatar} from './Avatar'
+import {Box} from './Box'
+import {Embed} from './Embed'
+import {Expandable} from './Expandable'
+import {Label} from './Label'
+import {Stack} from './Stack'
+import {Tabs} from './Tabs'
+
+export const VOCAB: Record<string, React.ComponentType<any>> = {
+  ActorLabel,
+  Avatar,
+  Box,
+  Embed,
+  Expandable,
+  Label,
+  Stack,
+  Tabs,
+}
+
+export function AppComponent({node}: {node: AppComNode}) {
+  const Com = VOCAB[node.type]
+  if (!Com) {
+    console.error('Unknown component:', node.type)
+    return <></>
+  }
+  return (
+    <ErrorBoundary fallbackRender={fallbackRender}>
+      <Com {...node.props}>
+        {node.children?.length
+          ? node.children.map((child, i) => (
+              <AppComponent key={child.key || String(i)} node={child} />
+            ))
+          : null}
+      </Com>
+    </ErrorBoundary>
+  )
+}
+function fallbackRender({error}: {error: Error}) {
+  const msg =
+    error instanceof ZodError
+      ? `${error.issues[0].path.join('.')}: ${error.issues[0].message}`
+      : error.toString()
+  return (
+    <View>
+      <Text>{msg}</Text>
+    </View>
+  )
+}

src/lib/routes/types.ts

@@ -25,6 +25,7 @@ export type CommonNavigatorParams = {
   ProfileLabelerLikedBy: {name: string}
   Debug: undefined
   DebugMod: undefined
+  DebugAppcom: undefined
   Log: undefined
   Support: undefined
   PrivacyPolicy: undefined

src/routes.ts

@@ -25,6 +25,7 @@ export const router = new Router({
   ProfileLabelerLikedBy: '/profile/:name/labeler/liked-by',
   Debug: '/sys/debug',
   DebugMod: '/sys/debug-mod',
+  DebugAppcom: '/sys/debug-appcom',
   Log: '/sys/log',
   AppPasswords: '/settings/app-passwords',
   PreferencesFollowingFeed: '/settings/following-feed',

src/view/screens/DebugAppcom.tsx

@@ -0,0 +1,204 @@
+import React from 'react'
+import {View} from 'react-native'
+
+import {CommonNavigatorParams, NativeStackScreenProps} from 'lib/routes/types'
+import {CenteredView, ScrollView} from '#/view/com/util/Views'
+import {atoms as a, useTheme} from '#/alf'
+import {AppComponentRegion} from '#/components/appcom/AppCom'
+import * as TextField from '#/components/forms/TextField'
+import {Text} from '#/components/Typography'
+
+const DEFAULT_AC = h('Stack', {gap: 10}, [
+  h('Label', {
+    size: 36,
+    lineHeight: 1.2,
+    weight: 'bold',
+    text: 'Hello, world!',
+  }),
+  h('Label', {
+    lineHeight: 1.2,
+    text: 'This is the initial version of a fantastic new feature of the AT Protocol called "application components."',
+  }),
+  h('Tabs', {labels: ['Layout', 'Display', 'Inputs', 'Forms', 'ATProto']}, [
+    h('Stack', {gap: 10, pad: {t: 20}}, [
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'Stack', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'default', corner: 10, pad: {x: 2, y: 6}}, [
+        h(
+          'Stack',
+          {
+            direction: 'row',
+            align: 'center',
+            gap: 10,
+            pad: {x: 10},
+          },
+          [
+            h('Label', {text: 'One'}),
+            h('Label', {text: 'Two', color: 'positive'}),
+            h('Box', {border: 'default', corner: 4, pad: 10}, [
+              {type: 'Label', props: {text: 'Three'}},
+            ]),
+            h('Box', {background: 'secondary', corner: 4, pad: 10}, [
+              {type: 'Label', props: {text: 'Four'}},
+            ]),
+            h('Label', {text: 'Five', color: 'secondary'}),
+          ],
+        ),
+      ]),
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'Box', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'default', corner: 10, pad: {x: 10, y: 14}}, [
+        h('Label', {
+          text: 'You can use the Box element as somewhat similar to a div.',
+        }),
+        h('Label', {text: 'Its children flow vertically with no gap.'}),
+        h('Label', {
+          text: 'What it offers is styling -- border, corner radius, background, and padding.',
+        }),
+        h('Label', {
+          text: 'If you want to control layout then you use a Stack, then if you want styling you use a Box.',
+        }),
+        h('Label', {
+          text: 'Boxes also make good neutral containers.',
+        }),
+      ]),
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'Expandable', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'default', corner: 10, pad: 6}, [
+        h('Expandable', {label: 'Expandable'}, [h('Label', {text: 'Content'})]),
+      ]),
+    ]),
+    h('Label', {text: 'Display TODO'}),
+    h('Label', {text: 'Inputs TODO'}),
+    h('Label', {text: 'Forms TODO'}),
+    h('Stack', {gap: 10, pad: {t: 20}}, [
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'Avatar', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8, pad: {x: 16, y: 12}}, [
+        h('Stack', {direction: 'row', gap: 10}, [
+          h('Avatar', {uri: 'bsky.app'}),
+          h('Avatar', {uri: 'at://atproto.com'}),
+          h('Avatar', {uri: 'at://pfrazee.com/'}),
+        ]),
+      ]),
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'ActorLabel', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8, pad: {x: 16, y: 12}}, [
+        h('Stack', {gap: 10}, [
+          h('Stack', {direction: 'row', gap: 8}, [
+            h('Label', {weight: 'bold', text: 'Display Name:'}),
+            h('ActorLabel', {uri: 'bsky.app', field: 'displayName'}),
+          ]),
+          h('Stack', {direction: 'row', gap: 8}, [
+            h('Label', {weight: 'bold', text: 'Handle:'}),
+            h('ActorLabel', {uri: 'bsky.app', field: 'handle'}),
+          ]),
+          h('Stack', {direction: 'row', gap: 8}, [
+            h('Label', {weight: 'bold', text: 'Description:'}),
+            h('ActorLabel', {uri: 'bsky.app', field: 'description'}),
+          ]),
+        ]),
+      ]),
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'Embed (Actor)', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8}, [
+        h('Embed', {uri: 'bsky.app'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8}, [
+        h('Embed', {uri: 'at://atproto.com/'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8}, [
+        h('Embed', {uri: 'at://pfrazee.com'}),
+      ]),
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {text: 'Embed (Post)', size: 10, weight: 'bold'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8}, [
+        h('Embed', {uri: 'at://pfrazee.com/app.bsky.feed.post/3ku7fbojcqs25'}),
+      ]),
+      h('Box', {border: 'secondary', corner: 8}, [
+        h('Embed', {uri: 'at://bsky.app/app.bsky.feed.post/3ku73zs755e27'}),
+      ]),
+      h('Box', {pad: {x: 10}}, [
+        h('Label', {
+          text: 'Embed (Unsupported record type)',
+          size: 10,
+          weight: 'bold',
+        }),
+      ]),
+      h('Box', {border: 'secondary', corner: 8}, [
+        h('Embed', {uri: 'at://pfrazee.com/com.example.unknown/123'}),
+      ]),
+    ]),
+  ]),
+])
+
+export const DebugAppcomScreen = ({}: NativeStackScreenProps<
+  CommonNavigatorParams,
+  'DebugAppcom'
+>) => {
+  const t = useTheme()
+  const [acJson, setAcJson] = React.useState(
+    JSON.stringify(DEFAULT_AC, null, 2),
+  )
+  const [acObj, setAcObj] = React.useState(undefined)
+  const [error, setError] = React.useState('')
+
+  React.useEffect(() => {
+    try {
+      setAcObj(JSON.parse(acJson))
+      setError('')
+    } catch (e: any) {
+      setError(e.toString())
+    }
+  }, [acJson, setAcObj, setError])
+
+  return (
+    <ScrollView>
+      <CenteredView style={[t.atoms.bg, a.px_lg, a.py_lg]}>
+        <Text style={[a.text_5xl, a.font_bold, a.pb_lg]}>
+          Application components
+        </Text>
+
+        <TextField.LabelText>Application JSON component</TextField.LabelText>
+        <TextField.Input
+          multiline
+          numberOfLines={20}
+          value={acJson}
+          onChangeText={setAcJson}
+          label="Application component JSON"
+        />
+
+        {error && (
+          <View
+            style={[
+              {backgroundColor: t.palette.negative_500},
+              a.px_lg,
+              a.py_md,
+              a.rounded_sm,
+            ]}>
+            <Text style={{color: '#fff'}}>{error}</Text>
+          </View>
+        )}
+
+        <View style={{height: 40}} />
+
+        {acObj && <AppComponentRegion tree={acObj} origin="@bsky.app" />}
+      </CenteredView>
+    </ScrollView>
+  )
+}
+
+function h(type: string, props?: any | Array<any>, children?: Array<any>) {
+  return {
+    type,
+    props: Array.isArray(props) ? undefined : props,
+    children: Array.isArray(props) ? props : children,
+  }
+}

yarn.lock

@@ -18820,6 +18820,13 @@ react-dom@^18.2.0:
     loose-envify "^1.1.0"
     scheduler "^0.23.0"
 
+react-error-boundary@^4.0.13:
+  version "4.0.13"
+  resolved "https://registry.yarnpkg.com/react-error-boundary/-/react-error-boundary-4.0.13.tgz#80386b7b27b1131c5fbb7368b8c0d983354c7947"
+  integrity sha512-b6PwbdSv8XeOSYvjt8LpgpKrZ0yGdtZokYwkwV2wlcZbxgopHX/hgPl5VgpnoVOWd868n1hktM8Qm4b+02MiLQ==
+  dependencies:
+    "@babel/runtime" "^7.12.5"
+
 react-error-overlay@^6.0.11:
   version "6.0.11"
   resolved "https://registry.yarnpkg.com/react-error-overlay/-/react-error-overlay-6.0.11.tgz#92835de5841c5cf08ba00ddd2d677b6d17ff9adb"