New Web Layout (#2126)

* Rip out virtualization on the web

* Screw around with layout

* onEndReached

* scrollToOffset

* Fix background

* onScroll

* Shell bars

* More scroll

* Fixes

* position: sticky

* Clean up 1

* Clean up 2

* Undo PagerWithHeader changes and fork it

* Trim down both versions

* Cleanup 3

* Memoize, lint

* Don't scroll away modal or lightbox

* Add content-visibility for rows

* Fix composer

* Fix types

* Fix borked scroll animation

* Fixes to layout

* More FlatList parity

* Layout fixes

* Fix more layout

* More layout

* More layouts

* Fix profile layout

* Remove onScroll

* Display: none inactive pages

* Add an intermediate List component

* Fix type

* Add onScrolledDownChange

* Port pager to use onScrolledDownChange

* Fix on mobile

* Don't pass down onScroll (replacement TBD)

* Remove resetMainScroll

* Replace onMainScroll with MainScrollProvider

* Hook ScrollProvider to pager

* Fix the remaining special case

* Optimize a bit

* Enforce that onScroll cannot be passed

* Keep value updated even if no handler

* Also memo it

* Move the fork to List.web

* Add scroll handler

* Consolidate List props a bit

* More stuff

* Rm unused

* Simplify

* Make isScrolledDown work

* Oops

* Fixes

* Hook up context scroll handlers

* Scroll restore for tabs

* Route scroll restoration POC

* Fix some issues with restoration

* Remove bad idea

* Fix pager scroll restoration

* Undo accidental locale changes

* onContentSizeChange

* Scroll to post

* Better positioning

* Layout fixes

* Factor out navigation stuff

* Cleanup

* Oops

* Cleanup

* Fixes and types

* Naming etc

* Fix crash

* Match FL semantics

* Snap the header scroll on the web

* Add body scroll lock

* Scroll to top on search

* Fix types

* Typos

* Fix Safari overflow

* Fix search positioning

* Add border

* Patch react navigation

* Revert "Patch react navigation"

This reverts commit 62516ed9c20410d166e1582b43b656c819495ddc.

* fixes

* scroll

* scrollbar

* cleanup unrelated

* undo unrel

* flatter

* Fix css

* twk

src/view/com/util/MainScrollProvider.tsx

@@ -1,9 +1,10 @@
-import React, {useCallback} from 'react'
+import React, {useCallback, useEffect} from 'react'
+import EventEmitter from 'eventemitter3'
 import {ScrollProvider} from '#/lib/ScrollContext'
 import {NativeScrollEvent} from 'react-native'
 import {useSetMinimalShellMode, useMinimalShellMode} from '#/state/shell'
 import {useShellLayout} from '#/state/shell/shell-layout'
-import {isNative} from 'platform/detection'
+import {isNative, isWeb} from 'platform/detection'
 import {useSharedValue, interpolate} from 'react-native-reanimated'
 
 const WEB_HIDE_SHELL_THRESHOLD = 200
@@ -20,6 +21,15 @@ export function MainScrollProvider({children}: {children: React.ReactNode}) {
   const startDragOffset = useSharedValue<number | null>(null)
   const startMode = useSharedValue<number | null>(null)
 
+  useEffect(() => {
+    if (isWeb) {
+      return listenToForcedWindowScroll(() => {
+        startDragOffset.value = null
+        startMode.value = null
+      })
+    }
+  })
+
   const onBeginDrag = useCallback(
     (e: NativeScrollEvent) => {
       'worklet'
@@ -100,3 +110,26 @@ export function MainScrollProvider({children}: {children: React.ReactNode}) {
     </ScrollProvider>
   )
 }
+
+const emitter = new EventEmitter()
+
+if (isWeb) {
+  const originalScroll = window.scroll
+  window.scroll = function () {
+    emitter.emit('forced-scroll')
+    return originalScroll.apply(this, arguments as any)
+  }
+
+  const originalScrollTo = window.scrollTo
+  window.scrollTo = function () {
+    emitter.emit('forced-scroll')
+    return originalScrollTo.apply(this, arguments as any)
+  }
+}
+
+function listenToForcedWindowScroll(listener: () => void) {
+  emitter.addListener('forced-scroll', listener)
+  return () => {
+    emitter.removeListener('forced-scroll', listener)
+  }
+}