src/app/components/CallEmbedProvider.tsx

@@ -37,7 +37,7 @@ import {
   useCallThemeSync,
   useCallStart,
 } from '../hooks/useCallEmbed';
-import { callChatAtom, callEmbedAtom } from '../state/callEmbed';
+import { callChatAtom, callEmbedAtom, immersiveCallAtom } from '../state/callEmbed';
 import { toastQueueAtom } from '../state/toast';
 import { CallEmbed, useCallControlState, useScreensharePromptOpen } from '../plugins/call';
 import { hangupCallAndWait } from '../plugins/call/hangup';
@@ -954,6 +954,7 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
   const inCallRoom = callEmbed && selectedRoom === callEmbed.roomId;
   const callActive = callEmbed && joined;
   const callVisible = inCallRoom && callActive && !chatOnlyView;
+  const immersiveCall = useAtomValue(immersiveCallAtom);
   const pipMode = callActive && !inCallRoom;
   const pipPromptOpen = useScreensharePromptOpen(callEmbed?.control);
   const { navigateRoom } = useRoomNavigate();
@@ -1458,7 +1459,13 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
           ...(pipMode
             ? { background: color.Surface.Container }
             : callVisible
-              ? wallpaperStyle
+              ? {
+                  // [Gitea #126] Full screen: the frame is transparent, so give
+                  // it an opaque base under the wallpaper or the room's
+                  // sidebar / call bar show through.
+                  ...(immersiveCall ? { backgroundColor: color.Background.Container } : {}),
+                  ...wallpaperStyle,
+                }
               : {}),
         }}
         ref={callEmbedRef}

src/app/features/call/CallView.tsx

@@ -23,6 +23,7 @@ import { useVoiceChannelFull } from '../../hooks/useVoiceChannelFull';
 import { CallMemberRenderer } from './CallMemberCard';
 import * as css from './styles.css';
 import { CallControls } from './CallControls';
+import { ImmersiveCallOverlay } from './ImmersiveCallOverlay';
 import { useLivekitSupport } from '../../hooks/useLivekitSupport';
 import { CallsUnavailableMessage } from './CallsUnavailable';
 import { webRTCSupported } from '../../utils/rtc';
@@ -198,10 +199,24 @@ function CallLoadErrorMessage() {
 type CallJoinedProps = {
   containerRef: RefObject<HTMLDivElement>;
   joined: boolean;
+  /** [Gitea #126] Full screen: controls float over the call instead. */
+  onExitImmersive?: () => void;
 };
-function CallJoined({ joined, containerRef }: CallJoinedProps) {
+function CallJoined({ joined, containerRef, onExitImmersive }: CallJoinedProps) {
   const callEmbed = useCallEmbed();
 
+  if (onExitImmersive) {
+    return (
+      <Box grow="Yes" direction="Column" style={{ position: 'relative' }}>
+        <Box grow="Yes" ref={containerRef} />
+        {callEmbed && joined && (
+          <ImmersiveCallOverlay callEmbed={callEmbed} onExit={onExitImmersive} />
+        )}
+        {callEmbed && joined && <LotusDecorationPusher callEmbed={callEmbed} />}
+      </Box>
+    );
+  }
+
   return (
     <Box grow="Yes" direction="Column">
       <Box grow="Yes" ref={containerRef} />
@@ -212,7 +227,7 @@ function CallJoined({ joined, containerRef }: CallJoinedProps) {
   );
 }
 
-export function CallView() {
+export function CallView({ onExitImmersive }: { onExitImmersive?: () => void } = {}) {
   const room = useRoom();
   const callContainerRef = useRef<HTMLDivElement>(null) as React.RefObject<HTMLDivElement>;
   useCallEmbedPlacementSync(callContainerRef);
@@ -227,6 +242,26 @@ export function CallView() {
   // made it into the call (a hung iframe / blank spinner otherwise).
   const showLoadError = isCurrentRoom && !currentJoined && Boolean(loadError);
 
+  if (onExitImmersive && currentJoined) {
+    // [Gitea #126] Cover the screen with a transparent layer above the call
+    // frame: the frame follows the placeholder (useCallEmbedPlacementSync), so
+    // it goes full screen too; the layer only takes touches on its own
+    // tap-catcher / controls, so the call underneath stays usable.
+    return (
+      <Box
+        style={{
+          position: 'fixed',
+          inset: 0,
+          zIndex: 10,
+          pointerEvents: 'none',
+          paddingTop: 'env(safe-area-inset-top)',
+        }}
+      >
+        <CallJoined joined containerRef={callContainerRef} onExitImmersive={onExitImmersive} />
+      </Box>
+    );
+  }
+
   return (
     <Box
       className={ContainerColor({ variant: 'Surface' })}

src/app/features/call/ImmersiveCallOverlay.tsx

@@ -0,0 +1,129 @@
+import React, { useCallback, useEffect, useRef, useState } from 'react';
+import { useSetAtom } from 'jotai';
+import { Box, Button, Icon, Icons, Text, config, toRem } from 'folds';
+import { CallEmbed } from '../../plugins/call';
+import { CallControls } from './CallControls';
+import { callChatAtom } from '../../state/callEmbed';
+import { CONTROLS_AUTOHIDE_MS, wantsBrowserFullscreen } from './landscapeCall';
+
+const isStandalone = (): boolean =>
+  window.matchMedia?.('(display-mode: standalone)').matches ||
+  (navigator as { standalone?: boolean }).standalone === true;
+
+/**
+ * [Gitea #126] Full-screen call controls. Taps inside the call frame never
+ * reach us, so while the controls are hidden a transparent layer covers the
+ * call: the first tap shows them (and is otherwise swallowed, as in native
+ * video apps); with them up the layer is gone, so the call stays usable. They
+ * hide again after a few seconds without a touch. The first tap in an Android
+ * browser tab also enters the browser's own full screen (hides the address
+ * bar); it is left again when this unmounts (rotate back, hang up, exit).
+ */
+export function ImmersiveCallOverlay({
+  callEmbed,
+  onExit,
+}: {
+  callEmbed: CallEmbed;
+  onExit: () => void;
+}) {
+  const [shown, setShown] = useState(false);
+  const timer = useRef<number | undefined>(undefined);
+  const enteredFullscreen = useRef(false);
+  const setChat = useSetAtom(callChatAtom);
+
+  const armHide = useCallback(() => {
+    window.clearTimeout(timer.current);
+    timer.current = window.setTimeout(() => setShown(false), CONTROLS_AUTOHIDE_MS);
+  }, []);
+
+  useEffect(
+    () => () => {
+      window.clearTimeout(timer.current);
+      if (enteredFullscreen.current && document.fullscreenElement === document.documentElement) {
+        document.exitFullscreen().catch(() => undefined);
+      }
+    },
+    [],
+  );
+
+  const reveal = () => {
+    if (
+      wantsBrowserFullscreen({
+        userAgent: navigator.userAgent,
+        standalone: isStandalone(),
+        fullscreenEnabled: !!document.fullscreenEnabled,
+        alreadyFullscreen: !!document.fullscreenElement,
+      })
+    ) {
+      document.documentElement
+        .requestFullscreen({ navigationUI: 'hide' })
+        .then(() => {
+          enteredFullscreen.current = true;
+        })
+        .catch(() => undefined);
+    }
+    setShown(true);
+    armHide();
+  };
+
+  if (!shown) {
+    return (
+      <div
+        role="button"
+        tabIndex={0}
+        aria-label="Show call controls"
+        onClick={reveal}
+        onKeyDown={(e) => (e.key === 'Enter' || e.key === ' ') && reveal()}
+        style={{ position: 'absolute', inset: 0, pointerEvents: 'auto' }}
+      />
+    );
+  }
+
+  return (
+    <Box
+      direction="Column"
+      // Any touch on the controls keeps them up a little longer.
+      onPointerDown={armHide}
+      style={{
+        position: 'absolute',
+        left: 0,
+        right: 0,
+        bottom: 0,
+        pointerEvents: 'auto',
+        paddingLeft: 'env(safe-area-inset-left)',
+        paddingRight: 'env(safe-area-inset-right)',
+        paddingBottom: 'env(safe-area-inset-bottom)',
+        background: 'linear-gradient(to top, rgba(0,0,0,0.7), rgba(0,0,0,0))',
+      }}
+    >
+      <Box
+        justifyContent="End"
+        gap="200"
+        style={{ padding: `${config.space.S200} ${config.space.S300} 0` }}
+      >
+        <Button
+          size="300"
+          variant="Secondary"
+          fill="Soft"
+          radii="Pill"
+          before={<Icon size="100" src={Icons.Message} />}
+          onClick={() => setChat(true)}
+        >
+          <Text size="B300">Chat</Text>
+        </Button>
+        <Button
+          size="300"
+          variant="Secondary"
+          fill="Soft"
+          radii="Pill"
+          before={<Icon size="100" src={Icons.Cross} />}
+          onClick={onExit}
+          style={{ minWidth: toRem(40) }}
+        >
+          <Text size="B300">Exit full screen</Text>
+        </Button>
+      </Box>
+      <CallControls callEmbed={callEmbed} />
+    </Box>
+  );
+}

src/app/features/call/landscapeCall.test.ts

@@ -0,0 +1,34 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { shouldGoImmersive, wantsBrowserFullscreen } from './landscapeCall';
+
+const base = { landscapePhone: true, joinedHere: true, chatOpen: false, dismissed: false };
+
+test('[#126] full screen only for a joined call on a sideways phone', () => {
+  assert.equal(shouldGoImmersive(base), true);
+  assert.equal(shouldGoImmersive({ ...base, landscapePhone: false }), false, 'upright / tablet');
+  assert.equal(shouldGoImmersive({ ...base, joinedHere: false }), false, 'prescreen / other room');
+  assert.equal(shouldGoImmersive({ ...base, chatOpen: true }), false, 'chat open');
+  assert.equal(shouldGoImmersive({ ...base, dismissed: true }), false, 'user exited');
+});
+
+test('[#126] browser full screen only in an Android browser tab', () => {
+  const env = {
+    userAgent: 'Mozilla/5.0 (Linux; Android 14; Pixel 8) Chrome/140 Mobile',
+    standalone: false,
+    fullscreenEnabled: true,
+    alreadyFullscreen: false,
+  };
+  assert.equal(wantsBrowserFullscreen(env), true);
+  assert.equal(wantsBrowserFullscreen({ ...env, standalone: true }), false, 'installed app');
+  assert.equal(
+    wantsBrowserFullscreen({
+      ...env,
+      userAgent: 'Mozilla/5.0 (iPhone; CPU iPhone OS 18_0) Safari',
+    }),
+    false,
+    'iPhone',
+  );
+  assert.equal(wantsBrowserFullscreen({ ...env, alreadyFullscreen: true }), false);
+  assert.equal(wantsBrowserFullscreen({ ...env, fullscreenEnabled: false }), false);
+});

src/app/features/call/landscapeCall.ts

@@ -0,0 +1,41 @@
+/**
+ * [Gitea #126] Phone turned sideways in a call: the call takes the whole
+ * screen. A phone in landscape is ~840px wide (the "Tablet" size class), so
+ * the trigger is the shape of the screen, not the size class: landscape, at
+ * most 500px tall, touch input. Tablets and desktops never match.
+ */
+export const LANDSCAPE_PHONE_QUERY =
+  '(orientation: landscape) and (max-height: 500px) and (pointer: coarse)';
+
+/** Controls hide again after this long without a touch on them. */
+export const CONTROLS_AUTOHIDE_MS = 4000;
+
+export type ImmersiveInputs = {
+  landscapePhone: boolean;
+  /** This room's call is the one we are in, and we have joined it. */
+  joinedHere: boolean;
+  /** The in-call chat is open (it replaces the call on small screens). */
+  chatOpen: boolean;
+  /** "Exit full screen" was pressed since the phone was last upright. */
+  dismissed: boolean;
+};
+
+/** Pure: whether the call should be full screen. */
+export const shouldGoImmersive = (i: ImmersiveInputs): boolean =>
+  i.landscapePhone && i.joinedHere && !i.chatOpen && !i.dismissed;
+
+/**
+ * Pure: use the browser's own full-screen mode too? Only where an address bar
+ * takes room: an Android browser tab (not the installed app / iOS, which have
+ * none or don't support it), when the page isn't already full screen.
+ */
+export const wantsBrowserFullscreen = (env: {
+  userAgent: string;
+  standalone: boolean;
+  fullscreenEnabled: boolean;
+  alreadyFullscreen: boolean;
+}): boolean =>
+  /Android/i.test(env.userAgent) &&
+  !env.standalone &&
+  env.fullscreenEnabled &&
+  !env.alreadyFullscreen;

src/app/features/room/Room.tsx

@@ -1,4 +1,4 @@
-import React, { useCallback, useEffect, useRef } from 'react';
+import React, { useCallback, useEffect, useRef, useState } from 'react';
 import { Box, Line } from 'folds';
 import { useParams } from 'react-router-dom';
 import { isKeyHotkey } from 'is-hotkey';
@@ -11,7 +11,6 @@ import { WidgetsPanel } from './widgets/WidgetsPanel';
 import { widgetsPanelAtom } from '../../state/widgetsPanel';
 import { mobileMembersPanelAtom } from '../../state/mobileMembersPanel';
 import { ScreenSize, useScreenSizeContext } from '../../hooks/useScreenSize';
-import { useMediaQuery } from '../../hooks/useMediaQuery';
 import { useSetting } from '../../state/hooks/settings';
 import { settingsAtom } from '../../state/settings';
 import { PowerLevelsContextProvider, usePowerLevels } from '../../hooks/usePowerLevels';
@@ -21,10 +20,12 @@ import { markAsRead } from '../../utils/notifications';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useRoomMembers } from '../../hooks/useRoomMembers';
 import { CallView } from '../call/CallView';
+import { LANDSCAPE_PHONE_QUERY, shouldGoImmersive } from '../call/landscapeCall';
+import { useMediaQuery } from '../../hooks/useMediaQuery';
 import { RoomViewHeader } from './RoomViewHeader';
-import { callChatAtom } from '../../state/callEmbed';
+import { callChatAtom, immersiveCallAtom } from '../../state/callEmbed';
 import { CallChatView } from './CallChatView';
-import { useCallEmbed } from '../../hooks/useCallEmbed';
+import { useCallEmbed, useCallJoined } from '../../hooks/useCallEmbed';
 import { useCallMembers, useCallSession } from '../../hooks/useCall';
 import { roomIdToActiveThreadIdAtomFamily } from '../../state/room/thread';
 import { threadsListAtom } from '../../state/threadsList';
@@ -57,6 +58,25 @@ export function Room() {
   const powerLevels = usePowerLevels(room);
   const members = useRoomMembers(mx, room.roomId);
   const chat = useAtomValue(callChatAtom);
+  // [Gitea #126] Phone turned sideways in this room's call: full screen.
+  const landscapePhone = useMediaQuery(LANDSCAPE_PHONE_QUERY);
+  const joinedAnywhere = useCallJoined(callEmbed);
+  const [immersiveDismissed, setImmersiveDismissed] = useState(false);
+  useEffect(() => {
+    // "Exit full screen" lasts until the phone is upright again.
+    if (!landscapePhone) setImmersiveDismissed(false);
+  }, [landscapePhone]);
+  const setImmersiveCall = useSetAtom(immersiveCallAtom);
+  const immersive = shouldGoImmersive({
+    landscapePhone,
+    joinedHere: joinedAnywhere && callEmbed?.roomId === room.roomId,
+    chatOpen: chat,
+    dismissed: immersiveDismissed,
+  });
+  useEffect(() => {
+    setImmersiveCall(immersive);
+    return () => setImmersiveCall(false);
+  }, [immersive, setImmersiveCall]);
   // Hoisted here (instead of inside RoomTimeline) so ThreadPanel/ThreadTimeline —
   // rendered as siblings of RoomView, not descendants — share the same computed
   // positions instead of falling back to the context default (Gitea #38).
@@ -170,7 +190,8 @@ export function Room() {
     <PowerLevelsContextProvider value={powerLevels}>
       <ReadPositionsContext.Provider value={readPositions}>
         <Box grow="Yes">
-          {callView && (screenSize === ScreenSize.Desktop || !chat) && (
+          {immersive && <CallView onExitImmersive={() => setImmersiveDismissed(true)} />}
+          {!immersive && callView && (screenSize === ScreenSize.Desktop || !chat) && (
             <Box grow="Yes" direction="Column">
               <RoomViewHeader callView />
               <Box grow="Yes">

src/app/pages/CallStatusRenderer.tsx

@@ -1,4 +1,6 @@
 import React from 'react';
+import { useAtomValue } from 'jotai';
+import { immersiveCallAtom } from '../state/callEmbed';
 import { useCallEmbed } from '../hooks/useCallEmbed';
 import { CallStatus } from '../features/call-status';
 import { useSelectedRoom } from '../hooks/router/useSelectedRoom';
@@ -9,8 +11,10 @@ export function CallStatusRenderer() {
   const selectedRoom = useSelectedRoom();
 
   const screenSize = useScreenSizeContext();
+  // [Gitea #126] The full-screen call has its own controls.
+  const immersive = useAtomValue(immersiveCallAtom);
 
-  if (!callEmbed) return null;
+  if (!callEmbed || immersive) return null;
 
   if (screenSize === ScreenSize.Mobile && callEmbed.roomId === selectedRoom) return null;
 

src/app/state/callEmbed.ts

@@ -18,3 +18,6 @@ export const callEmbedAtom = atom<CallEmbed | undefined, [CallEmbed | undefined]
 );
 
 export const callChatAtom = atom<boolean>(false);
+
+/** [Gitea #126] The call is full screen (phone turned sideways). */
+export const immersiveCallAtom = atom<boolean>(false);