refactor: adjust RoomView component for improved mobile composer behavior and styling

overlay/src/app/features/room/RoomView.tsx

@@ -14,7 +14,7 @@ import { RoomTimeline } from './RoomTimeline';
 import { RoomViewTyping } from './RoomViewTyping';
 import { RoomTombstone } from './RoomTombstone';
 import { RoomInput } from './RoomInput';
-import { RoomViewFollowing, RoomViewFollowingPlaceholder } from './RoomViewFollowing';
+import { RoomViewFollowing } from './RoomViewFollowing';
 import { Page } from '../../components/page';
 import { RoomViewHeader } from './RoomViewHeader';
 import { useKeyDown } from '../../hooks/useKeyDown';
@@ -27,6 +27,7 @@ import { activeThreadIdAtomFamily } from '../../state/activeThread';
 import { ThreadView } from './ThreadView';
 import { MobileSwipeToReplyLayer } from '../../components/mobile/MobileSwipeToReplyLayer';
 import { useMobileKeyboardLayout } from '../../hooks/useMobileKeyboardLayout';
+import * as composerCss from './room-composer-mobile.css';
 
 const FN_KEYS_REGEX = /^F\d+$/;
 const shouldFocusMessageField = (evt: KeyboardEvent): boolean => {
@@ -103,7 +104,8 @@ export function RoomView({ room, eventId }: { room: Room; eventId?: string }) {
     )
   );
 
-  const composerPadding = isLandscape ? '0' : `0 ${config.space.S400}`;
+  const flushComposer = keyboardOpen || isLandscape;
+  const composerPadding = flushComposer ? '0' : `0 ${config.space.S400}`;
   const showHeader = !keyboardOpen;
 
   return (
@@ -125,7 +127,20 @@ export function RoomView({ room, eventId }: { room: Room; eventId?: string }) {
               <RoomViewTyping room={room} />
             </Box>
           </MobileSwipeToReplyLayer>
-          <Box shrink="No" direction="Column" data-disable-swipe-back="true">
+          <Box
+            shrink="No"
+            direction="Column"
+            data-disable-swipe-back="true"
+            data-composer-flush={flushComposer ? 'true' : undefined}
+            className={composerCss.ComposerDock}
+          >
+            {!hideActivity && (
+              <div className={composerCss.FollowingFloat}>
+                <div className={composerCss.FollowingFloatHit}>
+                  <RoomViewFollowing room={room} />
+                </div>
+              </div>
+            )}
             <div style={{ padding: composerPadding }}>
               {tombstoneEvent ? (
                 <RoomTombstone
@@ -156,7 +171,6 @@ export function RoomView({ room, eventId }: { room: Room; eventId?: string }) {
                 </>
               )}
             </div>
-            {hideActivity ? <RoomViewFollowingPlaceholder /> : <RoomViewFollowing room={room} />}
           </Box>
         </>
       )}

overlay/src/app/features/room/RoomViewFollowing.css.ts

@@ -0,0 +1,41 @@
+import { style } from '@vanilla-extract/css';
+import { recipe } from '@vanilla-extract/recipes';
+import { DefaultReset, color, config } from 'folds';
+
+export const RoomViewFollowingPlaceholder = style([
+  DefaultReset,
+  {
+    display: 'none',
+    height: 0,
+  },
+]);
+
+export const RoomViewFollowing = recipe({
+  base: [
+    DefaultReset,
+    {
+      minHeight: 0,
+      padding: `${config.space.S100} ${config.space.S200}`,
+      width: 'auto',
+      maxWidth: '100%',
+      backgroundColor: 'transparent',
+      color: color.Surface.OnContainer,
+      outline: 'none',
+    },
+  ],
+  variants: {
+    clickable: {
+      true: {
+        cursor: 'pointer',
+        selectors: {
+          '&:hover, &:focus-visible': {
+            color: color.Primary.Main,
+          },
+          '&:active': {
+            color: color.Primary.Main,
+          },
+        },
+      },
+    },
+  },
+});

overlay/src/app/features/room/room-composer-mobile.css.ts

@@ -0,0 +1,63 @@
+import { style } from '@vanilla-extract/css';
+import { recipe } from '@vanilla-extract/recipes';
+import { DefaultReset, color, config } from 'folds';
+
+export const ComposerDock = style({
+  position: 'relative',
+});
+
+/** Read receipts float above the input so they don't reserve layout height. */
+export const FollowingFloat = style({
+  position: 'absolute',
+  bottom: '100%',
+  left: 0,
+  right: 0,
+  zIndex: 2,
+  display: 'flex',
+  justifyContent: 'flex-end',
+  pointerEvents: 'none',
+  padding: `0 ${config.space.S200}`,
+});
+
+export const FollowingFloatHit = style({
+  pointerEvents: 'auto',
+  maxWidth: '100%',
+});
+
+export const RoomViewFollowingPlaceholder = style([
+  DefaultReset,
+  {
+    display: 'none',
+    height: 0,
+  },
+]);
+
+export const RoomViewFollowing = recipe({
+  base: [
+    DefaultReset,
+    {
+      minHeight: 0,
+      padding: `${config.space.S100} ${config.space.S200}`,
+      width: 'auto',
+      maxWidth: '100%',
+      backgroundColor: 'transparent',
+      color: color.Surface.OnContainer,
+      outline: 'none',
+    },
+  ],
+  variants: {
+    clickable: {
+      true: {
+        cursor: 'pointer',
+        selectors: {
+          '&:hover, &:focus-visible': {
+            color: color.Primary.Main,
+          },
+          '&:active': {
+            color: color.Primary.Main,
+          },
+        },
+      },
+    },
+  },
+});