Merge branch 'main' into matroska

src/ListBox.tsx

@@ -23,10 +23,10 @@ import classNames from "classnames";
 import styles from "./ListBox.module.css";
 
 interface ListBoxProps<T> extends AriaListBoxOptions<T> {
-  className: string;
   optionClassName: string;
-  listBoxRef: React.MutableRefObject<HTMLUListElement>;
   state: ListState<T>;
+  className?: string;
+  listBoxRef?: React.MutableRefObject<HTMLUListElement>;
 }
 
 export function ListBox<T>({

src/auth/RegisterPage.tsx

@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 import React, {
+  ChangeEvent,
   FC,
   FormEvent,
   useCallback,
@@ -166,7 +167,9 @@ export const RegisterPage: FC = () => {
                   required
                   name="password"
                   type="password"
-                  onChange={(e) => setPassword(e.target.value)}
+                  onChange={(e: ChangeEvent<HTMLInputElement>) =>
+                    setPassword(e.target.value)
+                  }
                   value={password}
                   placeholder="Password"
                   label="Password"
@@ -177,7 +180,9 @@ export const RegisterPage: FC = () => {
                   required
                   type="password"
                   name="passwordConfirmation"
-                  onChange={(e) => setPasswordConfirmation(e.target.value)}
+                  onChange={(e: ChangeEvent<HTMLInputElement>) =>
+                    setPasswordConfirmation(e.target.value)
+                  }
                   value={passwordConfirmation}
                   placeholder="Confirm Password"
                   label="Confirm Password"

src/button/Button.tsx

@@ -13,7 +13,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
-import React, { forwardRef } from "react";
+import React, { forwardRef, useCallback } from "react";
 import { PressEvent } from "@react-types/shared";
 import classNames from "classnames";
 import { useButton } from "@react-aria/button";
@@ -29,6 +29,8 @@ import { ReactComponent as ScreenshareIcon } from "../icons/Screenshare.svg";
 import { ReactComponent as SettingsIcon } from "../icons/Settings.svg";
 import { ReactComponent as AddUserIcon } from "../icons/AddUser.svg";
 import { ReactComponent as ArrowDownIcon } from "../icons/ArrowDown.svg";
+import { ReactComponent as Fullscreen } from "../icons/Fullscreen.svg";
+import { ReactComponent as FullscreenExit } from "../icons/FullscreenExit.svg";
 import { TooltipTrigger } from "../Tooltip";
 import { VolumeIcon } from "./VolumeIcon";
 
@@ -262,3 +264,24 @@ export function AudioButton({ volume, ...rest }: AudioButtonProps) {
     </TooltipTrigger>
   );
 }
+
+interface FullscreenButtonProps extends Omit<Props, "variant"> {
+  fullscreen?: boolean;
+}
+
+export function FullscreenButton({
+  fullscreen,
+  ...rest
+}: FullscreenButtonProps) {
+  const getTooltip = useCallback(() => {
+    return fullscreen ? "Exit full screen" : "Full screen";
+  }, [fullscreen]);
+
+  return (
+    <TooltipTrigger tooltip={getTooltip}>
+      <Button variant="icon" {...rest}>
+        {fullscreen ? <FullscreenExit /> : <Fullscreen />}
+      </Button>
+    </TooltipTrigger>
+  );
+}

src/icons/Fullscreen.svg

@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M21 8.59V4C21 3.45 20.55 3 20 3H15.41C14.52 3 14.07 4.08 14.7 4.71L16.29 6.3L6.29 16.3L4.7 14.71C4.08 14.08 3 14.52 3 15.41V20C3 20.55 3.45 21 4 21H8.59C9.48 21 9.93 19.92 9.3 19.29L7.71 17.7L17.71 7.7L19.3 9.29C19.92 9.92 21 9.48 21 8.59Z" fill="white"/>
+</svg>

src/icons/FullscreenExit.svg

@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M21.29 4.12L16.7 8.71L18.29 10.3C18.92 10.93 18.47 12.01 17.58 12.01H13C12.45 12.01 12 11.56 12 11.01V6.41C12 5.52 13.08 5.07 13.71 5.7L15.3 7.29L19.89 2.7C20.28 2.31 20.91 2.31 21.3 2.7C21.68 3.1 21.68 3.73 21.29 4.12ZM4.11997 21.29L8.70997 16.7L10.3 18.29C10.93 18.92 12.01 18.47 12.01 17.58V13C12.01 12.45 11.56 12 11.01 12H6.40997C5.51997 12 5.06997 13.08 5.69997 13.71L7.28997 15.3L2.69997 19.89C2.30997 20.28 2.30997 20.91 2.69997 21.3C3.09997 21.68 3.72997 21.68 4.11997 21.29Z" fill="white"/>
+</svg>

src/input/AvatarInputField.tsx

@@ -15,42 +15,52 @@ limitations under the License.
 */
 
 import { useObjectRef } from "@react-aria/utils";
-import React, { useEffect } from "react";
+import React, { AllHTMLAttributes, useEffect } from "react";
 import { useCallback } from "react";
 import { useState } from "react";
 import { forwardRef } from "react";
-import { Avatar } from "../Avatar";
-import { Button } from "../button";
 import classNames from "classnames";
+
+import { Avatar, Size } from "../Avatar";
+import { Button } from "../button";
 import { ReactComponent as EditIcon } from "../icons/Edit.svg";
 import styles from "./AvatarInputField.module.css";
 
-export const AvatarInputField = forwardRef(
+interface Props extends AllHTMLAttributes<HTMLInputElement> {
+  id: string;
+  label: string;
+  avatarUrl: string;
+  displayName: string;
+  onRemoveAvatar: () => void;
+}
+
+export const AvatarInputField = forwardRef<HTMLInputElement, Props>(
   (
     { id, label, className, avatarUrl, displayName, onRemoveAvatar, ...rest },
     ref
   ) => {
     const [removed, setRemoved] = useState(false);
-    const [objUrl, setObjUrl] = useState(null);
+    const [objUrl, setObjUrl] = useState<string>(null);
 
     const fileInputRef = useObjectRef(ref);
 
     useEffect(() => {
-      const onChange = (e) => {
-        if (e.target.files.length > 0) {
-          setObjUrl(URL.createObjectURL(e.target.files[0]));
+      const currentInput = fileInputRef.current;
+
+      const onChange = (e: Event) => {
+        const inputEvent = e as unknown as React.ChangeEvent<HTMLInputElement>;
+        if (inputEvent.target.files.length > 0) {
+          setObjUrl(URL.createObjectURL(inputEvent.target.files[0]));
           setRemoved(false);
         } else {
           setObjUrl(null);
         }
       };
 
-      fileInputRef.current.addEventListener("change", onChange);
+      currentInput.addEventListener("change", onChange);
 
       return () => {
-        if (fileInputRef.current) {
-          fileInputRef.current.removeEventListener("change", onChange);
-        }
+        currentInput?.removeEventListener("change", onChange);
       };
     });
 
@@ -63,7 +73,7 @@ export const AvatarInputField = forwardRef(
       <div className={classNames(styles.avatarInputField, className)}>
         <div className={styles.avatarContainer}>
           <Avatar
-            size="xl"
+            size={Size.XL}
             src={removed ? null : objUrl || avatarUrl}
             fallback={displayName.slice(0, 1).toUpperCase()}
           />

src/input/Input.tsx

@@ -14,12 +14,23 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { forwardRef } from "react";
+import React, { ChangeEvent, forwardRef, ReactNode } from "react";
 import classNames from "classnames";
+
 import styles from "./Input.module.css";
 import { ReactComponent as CheckIcon } from "../icons/Check.svg";
 
-export function FieldRow({ children, rightAlign, className, ...rest }) {
+interface FieldRowProps {
+  children: ReactNode;
+  rightAlign?: boolean;
+  className?: string;
+}
+
+export function FieldRow({
+  children,
+  rightAlign,
+  className,
+}: FieldRowProps): JSX.Element {
   return (
     <div
       className={classNames(
@@ -33,11 +44,42 @@ export function FieldRow({ children, rightAlign, className, ...rest }) {
   );
 }
 
-export function Field({ children, className, ...rest }) {
+interface FieldProps {
+  children: ReactNode;
+  className?: string;
+}
+
+export function Field({ children, className }: FieldProps): JSX.Element {
   return <div className={classNames(styles.field, className)}>{children}</div>;
 }
 
-export const InputField = forwardRef(
+interface InputFieldProps {
+  label: string;
+  type: string;
+  prefix?: string;
+  suffix?: string;
+  id?: string;
+  checked?: boolean;
+  className?: string;
+  description?: string;
+  disabled?: boolean;
+  required?: boolean;
+  // this is a hack. Those variables should be part of `HTMLAttributes<HTMLInputElement> | HTMLAttributes<HTMLTextAreaElement>`
+  // but extending from this union type does not work
+  name?: string;
+  autoComplete?: string;
+  autoCorrect?: string;
+  autoCapitalize?: string;
+  value?: string;
+  placeholder?: string;
+  defaultChecked?: boolean;
+  onChange?: (event: ChangeEvent) => void;
+}
+
+export const InputField = forwardRef<
+  HTMLInputElement | HTMLTextAreaElement,
+  InputFieldProps
+>(
   (
     {
       id,
@@ -68,19 +110,18 @@ export const InputField = forwardRef(
         {type === "textarea" ? (
           <textarea
             id={id}
-            {...rest}
-            ref={ref}
-            type={type}
+            ref={ref as React.ForwardedRef<HTMLTextAreaElement>}
             disabled={disabled}
+            {...rest}
           />
         ) : (
           <input
             id={id}
-            {...rest}
-            ref={ref}
+            ref={ref as React.ForwardedRef<HTMLInputElement>}
             type={type}
             checked={checked}
             disabled={disabled}
+            {...rest}
           />
         )}
 
@@ -99,6 +140,10 @@ export const InputField = forwardRef(
   }
 );
 
-export function ErrorMessage({ children }) {
+export function ErrorMessage({
+  children,
+}: {
+  children: ReactNode;
+}): JSX.Element {
   return <p className={styles.errorMessage}>{children}</p>;
 }

src/input/SelectInput.tsx

@@ -15,16 +15,21 @@ limitations under the License.
 */
 
 import React, { useRef } from "react";
-import { HiddenSelect, useSelect } from "@react-aria/select";
+import { AriaSelectOptions, HiddenSelect, useSelect } from "@react-aria/select";
 import { useButton } from "@react-aria/button";
 import { useSelectState } from "@react-stately/select";
+import classNames from "classnames";
+
 import { Popover } from "../popover/Popover";
 import { ListBox } from "../ListBox";
 import styles from "./SelectInput.module.css";
-import classNames from "classnames";
 import { ReactComponent as ArrowDownIcon } from "../icons/ArrowDown.svg";
 
-export function SelectInput(props) {
+interface Props extends AriaSelectOptions<object> {
+  className?: string;
+}
+
+export function SelectInput(props: Props): JSX.Element {
   const state = useSelectState(props);
 
   const ref = useRef();

src/input/Toggle.tsx

@@ -15,22 +15,37 @@ limitations under the License.
 */
 
 import React, { useCallback, useRef } from "react";
-import styles from "./Toggle.module.css";
 import { useToggleButton } from "@react-aria/button";
 import classNames from "classnames";
+
+import styles from "./Toggle.module.css";
 import { Field } from "./Input";
 
-export function Toggle({ id, label, className, onChange, isSelected }) {
-  const buttonRef = useRef();
+interface Props {
+  id: string;
+  label: string;
+  onChange: (selected: boolean) => void;
+  isSelected: boolean;
+  className?: string;
+}
+
+export function Toggle({
+  id,
+  label,
+  className,
+  onChange,
+  isSelected,
+}: Props): JSX.Element {
+  const buttonRef = useRef<HTMLButtonElement>();
   const toggle = useCallback(() => {
     onChange(!isSelected);
-  });
-  const { buttonProps } = useToggleButton(
+  }, [isSelected, onChange]);
+
+  const buttonProps = useToggleButton(
     { isSelected },
-    { toggle },
+    { isSelected: isSelected, setSelected: undefined, toggle },
     buttonRef
   );
-
   return (
     <Field
       className={classNames(

src/profile/ProfileModal.tsx

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { useCallback, useEffect, useState } from "react";
+import React, { ChangeEvent, useCallback, useEffect, useState } from "react";
 import { MatrixClient } from "matrix-js-sdk";
 
 import { Button } from "../button";
@@ -47,7 +47,7 @@ export function ProfileModal({ client, ...rest }: Props) {
   }, []);
 
   const onChangeDisplayName = useCallback(
-    (e) => {
+    (e: ChangeEvent<HTMLInputElement>) => {
       setDisplayName(e.target.value);
     },
     [setDisplayName]

src/room/GroupCallInspector.tsx

@@ -22,7 +22,6 @@ import React, {
   useRef,
   createContext,
   useContext,
-  Dispatch,
 } from "react";
 import ReactJson, { CollapsedFieldProps } from "react-json-view";
 import mermaid from "mermaid";
@@ -156,7 +155,7 @@ interface SequenceDiagramViewerProps {
   localUserId: string;
   remoteUserIds: string[];
   selectedUserId: string;
-  onSelectUserId: Dispatch<(prevState: undefined) => undefined>;
+  onSelectUserId: (userId: string) => void;
   events: SequenceDiagramMatrixEvent[];
 }
 

src/room/InCallView.module.css

@@ -54,6 +54,12 @@ limitations under the License.
   margin-right: 0px;
 }
 
+.footerFullscreen {
+  position: absolute;
+  width: 100%;
+  bottom: 0;
+}
+
 .avatar {
   position: absolute;
   top: 50%;

src/room/InCallView.tsx

@@ -14,10 +14,11 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { useCallback, useMemo } from "react";
+import React, { useCallback, useMemo, useRef } from "react";
 import { usePreventScroll } from "@react-aria/overlays";
 import { GroupCall, MatrixClient } from "matrix-js-sdk";
 import { CallFeed } from "matrix-js-sdk/src/webrtc/callFeed";
+import classNames from "classnames";
 
 import styles from "./InCallView.module.css";
 import {
@@ -46,6 +47,7 @@ import { useMediaHandler } from "../settings/useMediaHandler";
 import { useShowInspector } from "../settings/useSetting";
 import { useModalTriggerState } from "../Modal";
 import { useAudioContext } from "../video-grid/useMediaStream";
+import { useFullscreen } from "../video-grid/useFullscreen";
 
 const canScreenshare = "getDisplayMedia" in (navigator.mediaDevices ?? {});
 // There is currently a bug in Safari our our code with cloning and sending MediaStreams
@@ -72,7 +74,8 @@ interface Props {
   roomIdOrAlias: string;
   unencryptedEventsFromUsers: Set<string>;
 }
-interface Participant {
+
+export interface Participant {
   id: string;
   callFeed: CallFeed;
   focused: boolean;
@@ -100,7 +103,9 @@ export function InCallView({
   unencryptedEventsFromUsers,
 }: Props) {
   usePreventScroll();
+  const elementRef = useRef<HTMLDivElement>();
   const [layout, setLayout] = useVideoGridLayout(screenshareFeeds.length > 0);
+  const { toggleFullscreen, fullscreenParticipant } = useFullscreen(elementRef);
 
   const [audioContext, audioDestination, audioRef] = useAudioContext();
   const { audioOutput } = useMediaHandler();
@@ -161,14 +166,73 @@ export function InCallView({
     );
   }, []);
 
+  const renderContent = useCallback((): JSX.Element => {
+    if (items.length === 0) {
+      return (
+        <div className={styles.centerMessage}>
+          <p>Waiting for other participants...</p>
+        </div>
+      );
+    }
+    if (fullscreenParticipant) {
+      return (
+        <VideoTileContainer
+          key={fullscreenParticipant.id}
+          item={fullscreenParticipant}
+          getAvatar={renderAvatar}
+          audioOutputDevice={audioOutput}
+          audioContext={audioContext}
+          audioDestination={audioDestination}
+          disableSpeakingIndicator={true}
+          isFullscreen={fullscreenParticipant}
+          onFullscreen={toggleFullscreen}
+        />
+      );
+    }
+
+    return (
+      <VideoGrid items={items} layout={layout} disableAnimations={isSafari}>
+        {({ item, ...rest }: { item: Participant; [x: string]: unknown }) => (
+          <VideoTileContainer
+            key={item.id}
+            item={item}
+            getAvatar={renderAvatar}
+            showName={items.length > 2 || item.focused}
+            audioOutputDevice={audioOutput}
+            audioContext={audioContext}
+            audioDestination={audioDestination}
+            disableSpeakingIndicator={items.length < 3}
+            isFullscreen={fullscreenParticipant}
+            onFullscreen={toggleFullscreen}
+            {...rest}
+          />
+        )}
+      </VideoGrid>
+    );
+  }, [
+    fullscreenParticipant,
+    items,
+    audioContext,
+    audioDestination,
+    audioOutput,
+    layout,
+    renderAvatar,
+    toggleFullscreen,
+  ]);
+
   const {
     modalState: rageshakeRequestModalState,
     modalProps: rageshakeRequestModalProps,
   } = useRageshakeRequestModal(groupCall.room.roomId);
 
+  const footerClassNames = classNames(styles.footer, {
+    [styles.footerFullscreen]: fullscreenParticipant,
+  });
+
   return (
-    <div className={styles.inRoom}>
+    <div className={styles.inRoom} ref={elementRef}>
       <audio ref={audioRef} />
+      {!fullscreenParticipant && (
         <Header>
           <LeftNav>
             <RoomHeaderInfo roomName={roomName} avatarUrl={avatarUrl} />
@@ -182,36 +246,18 @@ export function InCallView({
             <UserMenuContainer preventNavigation />
           </RightNav>
         </Header>
-      {items.length === 0 ? (
-        <div className={styles.centerMessage}>
-          <p>Waiting for other participants...</p>
-        </div>
-      ) : (
-        <VideoGrid items={items} layout={layout} disableAnimations={isSafari}>
-          {({ item, ...rest }: { item: Participant; [x: string]: unknown }) => (
-            <VideoTileContainer
-              key={item.id}
-              item={item}
-              getAvatar={renderAvatar}
-              showName={items.length > 2 || item.focused}
-              audioOutputDevice={audioOutput}
-              audioContext={audioContext}
-              audioDestination={audioDestination}
-              disableSpeakingIndicator={items.length < 3}
-              {...rest}
-            />
       )}
-        </VideoGrid>
-      )}
-      <div className={styles.footer}>
+      {renderContent()}
+      <div className={footerClassNames}>
         <MicButton muted={microphoneMuted} onPress={toggleMicrophoneMuted} />
         <VideoButton muted={localVideoMuted} onPress={toggleLocalVideoMuted} />
-        {canScreenshare && !isSafari && (
+        {canScreenshare && !isSafari && !fullscreenParticipant && (
           <ScreenshareButton
             enabled={isScreensharing}
             onPress={toggleScreensharing}
           />
         )}
+        {!fullscreenParticipant && (
           <OverflowMenu
             inCall
             roomIdOrAlias={roomIdOrAlias}
@@ -220,6 +266,7 @@ export function InCallView({
             feedbackModalState={feedbackModalState}
             feedbackModalProps={feedbackModalProps}
           />
+        )}
         <HangupButton onPress={onLeave} />
       </div>
       <GroupCallInspector

src/video-grid/VideoTile.jsx

@@ -20,7 +20,7 @@ import classNames from "classnames";
 import styles from "./VideoTile.module.css";
 import { ReactComponent as MicMutedIcon } from "../icons/MicMuted.svg";
 import { ReactComponent as VideoMutedIcon } from "../icons/VideoMuted.svg";
-import { AudioButton } from "../button/Button";
+import { AudioButton, FullscreenButton } from "../button/Button";
 
 export const VideoTile = forwardRef(
   (
@@ -39,6 +39,8 @@ export const VideoTile = forwardRef(
       onOptionsPress,
       showOptions,
       localVolume,
+      isFullscreen,
+      onFullscreen,
       ...rest
     },
     ref
@@ -50,17 +52,27 @@ export const VideoTile = forwardRef(
           [styles.speaking]: speaking,
           [styles.muted]: audioMuted,
           [styles.screenshare]: screenshare,
+          [styles.fullscreen]: isFullscreen,
         })}
         ref={ref}
         {...rest}
       >
-        {showOptions && (
+        {(!isLocal || screenshare) && (
           <div className={classNames(styles.toolbar)}>
+            {!isLocal && (
               <AudioButton
                 className={styles.button}
                 volume={localVolume}
                 onPress={onOptionsPress}
               />
+            )}
+            {screenshare && (
+              <FullscreenButton
+                className={styles.button}
+                fullscreen={isFullscreen}
+                onPress={onFullscreen}
+              />
+            )}
           </div>
         )}
         {(videoMuted || noVideo) && (

src/video-grid/VideoTile.module.css

@@ -40,6 +40,11 @@
   box-shadow: inset 0 0 0 4px var(--accent) !important;
 }
 
+.videoTile.fullscreen {
+  position: relative;
+  border-radius: 0;
+}
+
 .videoTile.screenshare > video {
   object-fit: contain;
 }
@@ -79,11 +84,11 @@
   z-index: 1;
 }
 
-.videoTile:not(.isLocal):not(:hover) .toolbar {
-  display: none;
+.toolbar:not(:hover) {
+  opacity: 0;
 }
 
-.videoTile:not(.isLocal):hover .presenterLabel {
+.toolbar:hover + .presenterLabel {
   top: calc(42px + 20px); /* toolbar + margin */
 }
 

src/video-grid/VideoTileContainer.jsx

@@ -22,6 +22,7 @@ import { useRoomMemberName } from "./useRoomMemberName";
 import { VideoTile } from "./VideoTile";
 import { VideoTileSettingsModal } from "./VideoTileSettingsModal";
 import { useModalTriggerState } from "../Modal";
+import { useCallback } from "react";
 
 export function VideoTileContainer({
   item,
@@ -33,6 +34,8 @@ export function VideoTileContainer({
   audioContext,
   audioDestination,
   disableSpeakingIndicator,
+  isFullscreen,
+  onFullscreen,
   ...rest
 }) {
   const {
@@ -63,6 +66,10 @@ export function VideoTileContainer({
     videoTileSettingsModalState.open();
   };
 
+  const onFullscreenCallback = useCallback(() => {
+    onFullscreen(item);
+  }, [onFullscreen, item]);
+
   // Firefox doesn't respect the disablePictureInPicture attribute
   // https://bugzilla.mozilla.org/show_bug.cgi?id=1611831
 
@@ -81,8 +88,9 @@ export function VideoTileContainer({
         mediaRef={mediaRef}
         avatar={getAvatar && getAvatar(member, width, height)}
         onOptionsPress={onOptionsPress}
-        showOptions={!item.callFeed.isLocal()}
         localVolume={localVolume}
+        isFullscreen={isFullscreen}
+        onFullscreen={onFullscreenCallback}
         {...rest}
       />
       {videoTileSettingsModalState.isOpen && (

src/video-grid/useFullscreen.tsx

@@ -0,0 +1,56 @@
+/*
+Copyright 2022 New Vector Ltd
+
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { useCallback, useState } from "react";
+
+import { Participant } from "../room/InCallView";
+import { useEventTarget } from "../useEvents";
+
+export function useFullscreen(ref: React.RefObject<HTMLElement>): {
+  toggleFullscreen: (participant: Participant) => void;
+  fullscreenParticipant: Participant | null;
+} {
+  const [fullscreenParticipant, setFullscreenParticipant] =
+    useState<Participant | null>(null);
+
+  const toggleFullscreen = useCallback(
+    (participant: Participant) => {
+      if (fullscreenParticipant) {
+        document.exitFullscreen();
+        setFullscreenParticipant(null);
+      } else {
+        try {
+          ref.current.requestFullscreen();
+          setFullscreenParticipant(participant);
+        } catch (error) {
+          console.warn("Failed to fullscreen:", error);
+        }
+      }
+    },
+    [fullscreenParticipant, setFullscreenParticipant, ref]
+  );
+
+  const onFullscreenChanged = useCallback(() => {
+    if (!document.fullscreenElement) {
+      setFullscreenParticipant(null);
+    }
+  }, [setFullscreenParticipant]);
+
+  useEventTarget(ref.current, "fullscreenchange", onFullscreenChanged);
+
+  return { toggleFullscreen, fullscreenParticipant };
+}