Revert to old modal on android (#4458)

* revert to old modal on android

* close alf dialogs before closing composer

* Try to fix white area

* Use hook

* Fix Back button

* oops

---------

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/view/shell/Composer.ios.tsx b/src/view/shell/Composer.ios.tsx
new file mode 100644
index 000000000..a732e0cde
--- /dev/null
+++ b/src/view/shell/Composer.ios.tsx
@@ -0,0 +1,80 @@
+import React, {useLayoutEffect} from 'react'
+import {Modal, View} from 'react-native'
+import {StatusBar} from 'expo-status-bar'
+import * as SystemUI from 'expo-system-ui'
+import {observer} from 'mobx-react-lite'
+
+import {useComposerState} from '#/state/shell/composer'
+import {atoms as a, useTheme} from '#/alf'
+import {getBackgroundColor, useThemeName} from '#/alf/util/useColorModeTheme'
+import {ComposePost, useComposerCancelRef} from '../com/composer/Composer'
+
+export const Composer = observer(function ComposerImpl({}: {
+  winHeight: number
+}) {
+  const t = useTheme()
+  const state = useComposerState()
+  const ref = useComposerCancelRef()
+
+  const open = !!state
+
+  return (
+    <Modal
+      aria-modal
+      accessibilityViewIsModal
+      visible={open}
+      presentationStyle="pageSheet"
+      animationType="slide"
+      onRequestClose={() => ref.current?.onPressCancel()}>
+      <View style={[t.atoms.bg, a.flex_1]}>
+        <Providers open={open}>
+          <ComposePost
+            cancelRef={ref}
+            replyTo={state?.replyTo}
+            onPost={state?.onPost}
+            quote={state?.quote}
+            mention={state?.mention}
+            text={state?.text}
+            imageUris={state?.imageUris}
+          />
+        </Providers>
+      </View>
+    </Modal>
+  )
+})
+
+function Providers({
+  children,
+  open,
+}: {
+  children: React.ReactNode
+  open: boolean
+}) {
+  // on iOS, it's a native formSheet. We use FullWindowOverlay to make
+  // the dialogs appear over it
+  return (
+    <>
+      {children}
+      <IOSModalBackground active={open} />
+    </>
+  )
+}
+
+// Generally, the backdrop of the app is the theme color, but when this is open
+// we want it to be black due to the modal being a form sheet.
+function IOSModalBackground({active}: {active: boolean}) {
+  const theme = useThemeName()
+
+  useLayoutEffect(() => {
+    SystemUI.setBackgroundColorAsync('black')
+
+    return () => {
+      SystemUI.setBackgroundColorAsync(getBackgroundColor(theme))
+    }
+  }, [theme])
+
+  // Set the status bar to light - however, only if the modal is active
+  // If we rely on this component being mounted to set this,
+  // there'll be a delay before it switches back to default.
+  return active ? <StatusBar style="light" animated /> : null
+}