replace duplicated handler code

app/javascript/mastodon/components/display_name/index.tsx

@@ -61,13 +61,19 @@ export const DisplayName: FC<Props & ComponentPropsWithoutRef<'span'>> = ({
   if (simple) {
     return (
       <bdi>
-        <EmojiHTML {...props} htmlString={accountName} shallow as='span' />
+        <EmojiHTML
+          {...props}
+          className={`animate-parent ${className}`}
+          htmlString={accountName}
+          shallow
+          as='span'
+        />
       </bdi>
     );
   }
 
   return (
-    <span {...props} className={`display-name ${className}`}>
+    <span {...props} className={`display-name animate-parent ${className}`}>
       <bdi>
         <EmojiHTML
           {...props}

app/javascript/mastodon/components/status_content.jsx

@@ -13,8 +13,9 @@ import ChevronRightIcon from '@/material-icons/400-24px/chevron_right.svg?react'
 import { Icon }  from 'mastodon/components/icon';
 import { Poll } from 'mastodon/components/poll';
 import { identityContextPropShape, withIdentity } from 'mastodon/identity_context';
-import { autoPlayGif, languages as preloadedLanguages } from 'mastodon/initial_state';
+import { languages as preloadedLanguages } from 'mastodon/initial_state';
 import { EmojiHTML } from '../features/emoji/emoji_html';
+import { handleAnimateEnter, handleAnimateLeave } from '../features/emoji/handlers';
 import { isModernEmojiEnabled } from '../utils/environment';
 
 const MAX_HEIGHT = 706; // 22px * 32 (+ 2px padding at the top)
@@ -150,32 +151,6 @@ class StatusContent extends PureComponent {
     }
   }
 
-  handleMouseEnter = ({ currentTarget }) => {
-    if (autoPlayGif) {
-      return;
-    }
-
-    const emojis = currentTarget.querySelectorAll('.custom-emoji');
-
-    for (var i = 0; i < emojis.length; i++) {
-      let emoji = emojis[i];
-      emoji.src = emoji.getAttribute('data-original');
-    }
-  };
-
-  handleMouseLeave = ({ currentTarget }) => {
-    if (autoPlayGif) {
-      return;
-    }
-
-    const emojis = currentTarget.querySelectorAll('.custom-emoji');
-
-    for (var i = 0; i < emojis.length; i++) {
-      let emoji = emojis[i];
-      emoji.src = emoji.getAttribute('data-static');
-    }
-  };
-
   componentDidMount () {
     this._updateStatusLinks();
   }
@@ -245,7 +220,7 @@ class StatusContent extends PureComponent {
 
     const content = statusContent ?? getStatusContent(status);
     const language = status.getIn(['translation', 'language']) || status.get('language');
-    const classNames = classnames('status__content', {
+    const classNames = classnames('status__content animate-parent', {
       'status__content--with-action': this.props.onClick && this.props.history,
       'status__content--collapsed': renderReadMore,
     });
@@ -267,7 +242,15 @@ class StatusContent extends PureComponent {
     if (this.props.onClick) {
       return (
         <>
-          <div className={classNames} ref={this.setRef} onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp} key='status-content' onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
+          <div
+            className={classNames}
+            ref={this.setRef}
+            onMouseDown={this.handleMouseDown}
+            onMouseUp={this.handleMouseUp}
+            key='status-content'
+            onMouseEnter={handleAnimateEnter}
+            onMouseLeave={handleAnimateLeave}
+          >
             <EmojiHTML
               className='status__content__text status__content__text--visible translate'
               lang={language}
@@ -284,7 +267,7 @@ class StatusContent extends PureComponent {
       );
     } else {
       return (
-        <div className={classNames} ref={this.setRef} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
+        <div className={classNames} ref={this.setRef} onMouseEnter={handleAnimateEnter} onMouseLeave={handleAnimateLeave}>
           <EmojiHTML
             className='status__content__text status__content__text--visible translate'
             lang={language}

app/javascript/mastodon/features/account_timeline/components/account_header.tsx

@@ -8,6 +8,10 @@ import { NavLink } from 'react-router-dom';
 
 import { AccountBio } from '@/mastodon/components/account_bio';
 import { DisplayName } from '@/mastodon/components/display_name';
+import {
+  handleAnimateEnter,
+  handleAnimateLeave,
+} from '@/mastodon/features/emoji/handlers';
 import CheckIcon from '@/material-icons/400-24px/check.svg?react';
 import LockIcon from '@/material-icons/400-24px/lock.svg?react';
 import MoreHorizIcon from '@/material-icons/400-24px/more_horiz.svg?react';
@@ -379,36 +383,6 @@ export const AccountHeader: React.FC<{
     });
   }, [account]);
 
-  const handleMouseEnter = useCallback(
-    ({ currentTarget }: React.MouseEvent) => {
-      if (autoPlayGif) {
-        return;
-      }
-
-      currentTarget
-        .querySelectorAll<HTMLImageElement>('.custom-emoji')
-        .forEach((emoji) => {
-          emoji.src = emoji.getAttribute('data-original') ?? '';
-        });
-    },
-    [],
-  );
-
-  const handleMouseLeave = useCallback(
-    ({ currentTarget }: React.MouseEvent) => {
-      if (autoPlayGif) {
-        return;
-      }
-
-      currentTarget
-        .querySelectorAll<HTMLImageElement>('.custom-emoji')
-        .forEach((emoji) => {
-          emoji.src = emoji.getAttribute('data-static') ?? '';
-        });
-    },
-    [],
-  );
-
   const suspended = account?.suspended;
   const isRemote = account?.acct !== account?.username;
   const remoteDomain = isRemote ? account?.acct.split('@')[1] : null;
@@ -808,11 +782,11 @@ export const AccountHeader: React.FC<{
       )}
 
       <div
-        className={classNames('account__header', {
+        className={classNames('account__header animate-parent', {
           inactive: !!account.moved,
         })}
-        onMouseEnter={handleMouseEnter}
-        onMouseLeave={handleMouseLeave}
+        onMouseEnter={handleAnimateEnter}
+        onMouseLeave={handleAnimateLeave}
       >
         {!(suspended || hidden || account.moved) &&
           relationship?.requested_by && (

app/javascript/mastodon/features/direct_timeline/components/conversation.jsx

@@ -23,9 +23,9 @@ import { IconButton } from 'mastodon/components/icon_button';
 import { RelativeTimestamp } from 'mastodon/components/relative_timestamp';
 import StatusContent from 'mastodon/components/status_content';
 import { Dropdown } from 'mastodon/components/dropdown_menu';
-import { autoPlayGif } from 'mastodon/initial_state';
 import { makeGetStatus } from 'mastodon/selectors';
 import { LinkedDisplayName } from '@/mastodon/components/display_name';
+import { handleAnimateEnter, handleAnimateLeave } from '@/mastodon/features/emoji/handlers';
 
 const messages = defineMessages({
   more: { id: 'status.more', defaultMessage: 'More' },
@@ -57,31 +57,8 @@ export const Conversation = ({ conversation, scrollKey, onMoveUp, onMoveDown })
   const lastStatus = useSelector(state => getStatus(state, { id: lastStatusId }));
   const accounts = useSelector(state => getAccounts(state, accountIds));
 
-  const handleMouseEnter = useCallback(({ currentTarget }) => {
-    if (autoPlayGif) {
-      return;
-    }
-
-    const emojis = currentTarget.querySelectorAll('.custom-emoji');
-
-    for (var i = 0; i < emojis.length; i++) {
-      let emoji = emojis[i];
-      emoji.src = emoji.getAttribute('data-original');
-    }
-  }, []);
-
-  const handleMouseLeave = useCallback(({ currentTarget }) => {
-    if (autoPlayGif) {
-      return;
-    }
-
-    const emojis = currentTarget.querySelectorAll('.custom-emoji');
-
-    for (var i = 0; i < emojis.length; i++) {
-      let emoji = emojis[i];
-      emoji.src = emoji.getAttribute('data-static');
-    }
-  }, []);
+  const handleMouseEnter = useCallback(handleAnimateEnter, []);
+  const handleMouseLeave = useCallback(handleAnimateLeave, []);
 
   const handleClick = useCallback(() => {
     if (unread) {
@@ -173,7 +150,7 @@ export const Conversation = ({ conversation, scrollKey, onMoveUp, onMoveDown })
               {unread && <span className='conversation__unread' />} <RelativeTimestamp timestamp={lastStatus.get('created_at')} />
             </div>
 
-            <div className='conversation__content__names' onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave}>
+            <div className='conversation__content__names animate-parent' onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave}>
               <FormattedMessage id='conversation.with' defaultMessage='With {names}' values={{ names: <span>{names}</span> }} />
             </div>
           </div>

app/javascript/mastodon/features/directory/components/account_card.tsx

@@ -1,4 +1,3 @@
-import type { MouseEventHandler } from 'react';
 import { useCallback } from 'react';
 
 import { FormattedMessage, defineMessages, useIntl } from 'react-intl';
@@ -6,6 +5,10 @@ import { FormattedMessage, defineMessages, useIntl } from 'react-intl';
 import classNames from 'classnames';
 import { Link } from 'react-router-dom';
 
+import {
+  handleAnimateEnter,
+  handleAnimateLeave,
+} from '@/mastodon/features/emoji/handlers';
 import {
   followAccount,
   unblockAccount,
@@ -44,38 +47,8 @@ export const AccountCard: React.FC<{ accountId: string }> = ({ accountId }) => {
   const account = useAppSelector((s) => getAccount(s, accountId));
   const dispatch = useAppDispatch();
 
-  const handleMouseEnter = useCallback<MouseEventHandler>(
-    ({ currentTarget }) => {
-      if (autoPlayGif) {
-        return;
-      }
-      const emojis =
-        currentTarget.querySelectorAll<HTMLImageElement>('.custom-emoji');
-
-      emojis.forEach((emoji) => {
-        const original = emoji.getAttribute('data-original');
-        if (original) emoji.src = original;
-      });
-    },
-    [],
-  );
-
-  const handleMouseLeave = useCallback<MouseEventHandler>(
-    ({ currentTarget }) => {
-      if (autoPlayGif) {
-        return;
-      }
-
-      const emojis =
-        currentTarget.querySelectorAll<HTMLImageElement>('.custom-emoji');
-
-      emojis.forEach((emoji) => {
-        const staticUrl = emoji.getAttribute('data-static');
-        if (staticUrl) emoji.src = staticUrl;
-      });
-    },
-    [],
-  );
+  const handleMouseEnter = useCallback(handleAnimateEnter, []);
+  const handleMouseLeave = useCallback(handleAnimateLeave, []);
 
   const handleFollow = useCallback(() => {
     if (!account) return;
@@ -185,7 +158,7 @@ export const AccountCard: React.FC<{ accountId: string }> = ({ accountId }) => {
 
       {account.get('note').length > 0 && (
         <div
-          className='account-card__bio translate'
+          className='account-card__bio translate animate-parent'
           onMouseEnter={handleMouseEnter}
           onMouseLeave={handleMouseLeave}
           dangerouslySetInnerHTML={{ __html: account.get('note_emojified') }}

app/javascript/mastodon/features/emoji/emoji_html.tsx

@@ -5,22 +5,23 @@ import type { CustomEmojiMapArg } from './types';
 
 type EmojiHTMLProps<Element extends ElementType = 'div'> = Omit<
   ComponentPropsWithoutRef<Element>,
-  'dangerouslySetInnerHTML'
+  'dangerouslySetInnerHTML' | 'className'
 > & {
   htmlString: string;
   extraEmojis?: CustomEmojiMapArg;
   as?: Element;
   shallow?: boolean;
+  className?: string;
 };
 
-export const EmojiHTML = <Element extends ElementType>({
+export const EmojiHTML = ({
   extraEmojis,
   htmlString,
-  as: asElement, // Rename for syntax highlighting
+  as: Wrapper = 'div', // Rename for syntax highlighting
   shallow,
+  className = '',
   ...props
-}: EmojiHTMLProps<Element>) => {
-  const Wrapper = asElement ?? 'div';
+}: EmojiHTMLProps<ElementType>) => {
   const emojifiedHtml = useEmojify({
     text: htmlString,
     extraEmojis,
@@ -32,6 +33,10 @@ export const EmojiHTML = <Element extends ElementType>({
   }
 
   return (
-    <Wrapper {...props} dangerouslySetInnerHTML={{ __html: emojifiedHtml }} />
+    <Wrapper
+      {...props}
+      className={`${className} animate-parent`}
+      dangerouslySetInnerHTML={{ __html: emojifiedHtml }}
+    />
   );
 };

app/javascript/mastodon/features/emoji/handlers.ts

@@ -0,0 +1,78 @@
+import type { MouseEventHandler } from 'react';
+
+import { autoPlayGif } from '@/mastodon/initial_state';
+import { isModernEmojiEnabled } from '@/mastodon/utils/environment';
+
+export const handleAnimateEnter: MouseEventHandler = ({ currentTarget }) => {
+  if (autoPlayGif || isModernEmojiEnabled()) {
+    return;
+  }
+
+  currentTarget
+    .querySelectorAll<HTMLImageElement>('img.custom-emoji')
+    .forEach((emoji) => {
+      toggleAnimatedGif(emoji, true);
+    });
+};
+
+export const handleAnimateLeave: MouseEventHandler = ({ currentTarget }) => {
+  if (autoPlayGif || isModernEmojiEnabled()) {
+    return;
+  }
+
+  currentTarget
+    .querySelectorAll<HTMLImageElement>('img.custom-emoji')
+    .forEach((emoji) => {
+      toggleAnimatedGif(emoji, false);
+    });
+};
+
+const PARENT_MAX_DEPTH = 10;
+
+export function handleAnimateGif(event: MouseEvent) {
+  const { target, type } = event;
+  const animate = type === 'mouseover';
+  if (target instanceof HTMLImageElement) {
+    toggleAnimatedGif(target, animate);
+  } else if (!(target instanceof HTMLElement) || target === document.body) {
+    return;
+  }
+  let parent: HTMLElement | null = null;
+  let iter = 0;
+  if (target.classList.contains('animate-parent')) {
+    parent = target;
+  } else {
+    let current: HTMLElement | null = target;
+    while (current) {
+      if (iter >= PARENT_MAX_DEPTH) {
+        return; // We can just exit right now.
+      }
+      current = current.parentElement;
+      if (current?.classList.contains('animate-parent')) {
+        parent = current;
+        break;
+      }
+      iter++;
+    }
+  }
+
+  if (parent) {
+    const animatedChildren =
+      parent.querySelectorAll<HTMLImageElement>('img.custom-emoji');
+    for (const child of animatedChildren) {
+      toggleAnimatedGif(child, animate);
+    }
+  }
+}
+
+function toggleAnimatedGif(image: HTMLImageElement, animate: boolean) {
+  const { classList, dataset } = image;
+  if (
+    !classList.contains('custom-emoji') ||
+    !dataset.static ||
+    !dataset.original
+  ) {
+    return;
+  }
+  image.src = animate ? dataset.original : dataset.static;
+}

app/javascript/mastodon/features/emoji/index.ts

@@ -1,6 +1,7 @@
-import initialState from '@/mastodon/initial_state';
+import initialState, { autoPlayGif } from '@/mastodon/initial_state';
 import { loadWorker } from '@/mastodon/utils/workers';
 
+import { handleAnimateGif } from './handlers';
 import { toSupportedLocale } from './locale';
 import { emojiLogger } from './utils';
 
@@ -22,6 +23,11 @@ export function initializeEmoji() {
     }
   }
 
+  if (typeof document !== 'undefined' && !autoPlayGif) {
+    document.addEventListener('mouseover', handleAnimateGif, { passive: true });
+    document.addEventListener('mouseout', handleAnimateGif, { passive: true });
+  }
+
   if (worker) {
     // Assign worker to const to make TS happy inside the event listener.
     const thisWorker = worker;
@@ -51,16 +57,6 @@ export function initializeEmoji() {
   }
 }
 
-async function fallbackLoad() {
-  log('falling back to main thread for loading');
-  const { importCustomEmojiData } = await import('./loader');
-  await importCustomEmojiData();
-  await loadEmojiLocale(userLocale);
-  if (userLocale !== 'en') {
-    await loadEmojiLocale('en');
-  }
-}
-
 export async function loadEmojiLocale(localeString: string) {
   const locale = toSupportedLocale(localeString);
 
@@ -71,3 +67,13 @@ export async function loadEmojiLocale(localeString: string) {
     await importEmojiData(locale);
   }
 }
+
+async function fallbackLoad() {
+  log('falling back to main thread for loading');
+  const { importCustomEmojiData } = await import('./loader');
+  await importCustomEmojiData();
+  await loadEmojiLocale(userLocale);
+  if (userLocale !== 'en') {
+    await loadEmojiLocale('en');
+  }
+}

app/javascript/mastodon/features/getting_started/components/announcements.jsx

@@ -24,6 +24,7 @@ import { unicodeMapping } from 'mastodon/features/emoji/emoji_unicode_mapping_li
 import { autoPlayGif, reduceMotion, disableSwiping, mascot } from 'mastodon/initial_state';
 import { assetHost } from 'mastodon/utils/config';
 import { WithRouterPropTypes } from 'mastodon/utils/react_router';
+import { handleAnimateEnter, handleAnimateLeave } from '../../emoji/handlers';
 
 const messages = defineMessages({
   close: { id: 'lightbox.close', defaultMessage: 'Close' },
@@ -111,42 +112,16 @@ class ContentWithRouter extends ImmutablePureComponent {
     }
   };
 
-  handleMouseEnter = ({ currentTarget }) => {
-    if (autoPlayGif) {
-      return;
-    }
-
-    const emojis = currentTarget.querySelectorAll('.custom-emoji');
-
-    for (var i = 0; i < emojis.length; i++) {
-      let emoji = emojis[i];
-      emoji.src = emoji.getAttribute('data-original');
-    }
-  };
-
-  handleMouseLeave = ({ currentTarget }) => {
-    if (autoPlayGif) {
-      return;
-    }
-
-    const emojis = currentTarget.querySelectorAll('.custom-emoji');
-
-    for (var i = 0; i < emojis.length; i++) {
-      let emoji = emojis[i];
-      emoji.src = emoji.getAttribute('data-static');
-    }
-  };
-
   render () {
     const { announcement } = this.props;
 
     return (
       <div
-        className='announcements__item__content translate'
+        className='announcements__item__content translate animate-parent'
         ref={this.setRef}
         dangerouslySetInnerHTML={{ __html: announcement.get('contentHtml') }}
-        onMouseEnter={this.handleMouseEnter}
-        onMouseLeave={this.handleMouseLeave}
+        onMouseEnter={handleAnimateEnter}
+        onMouseLeave={handleAnimateLeave}
       />
     );
   }
@@ -238,9 +213,20 @@ class Reaction extends ImmutablePureComponent {
     }
 
     return (
-      <animated.button className={classNames('reactions-bar__item', { active: reaction.get('me') })} onClick={this.handleClick} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave} title={`:${shortCode}:`} style={this.props.style}>
-        <span className='reactions-bar__item__emoji'><Emoji hovered={this.state.hovered} emoji={reaction.get('name')} emojiMap={this.props.emojiMap} /></span>
-        <span className='reactions-bar__item__count'><AnimatedNumber value={reaction.get('count')} /></span>
+      <animated.button
+        className={classNames('reactions-bar__item', { active: reaction.get('me') })}
+        onClick={this.handleClick}
+        onMouseEnter={this.handleMouseEnter}
+        onMouseLeave={this.handleMouseLeave}
+        title={`:${shortCode}:`}
+        style={this.props.style}
+      >
+        <span className='reactions-bar__item__emoji'>
+          <Emoji hovered={this.state.hovered} emoji={reaction.get('name')} emojiMap={this.props.emojiMap} />
+        </span>
+        <span className='reactions-bar__item__count'>
+          <AnimatedNumber value={reaction.get('count')} />
+        </span>
       </animated.button>
     );
   }

app/javascript/mastodon/features/notifications_v2/components/embedded_status.tsx

@@ -15,6 +15,8 @@ import { DisplayName } from 'mastodon/components/display_name';
 import { Icon } from 'mastodon/components/icon';
 import { useAppSelector, useAppDispatch } from 'mastodon/store';
 
+import { handleAnimateEnter, handleAnimateLeave } from '../../emoji/handlers';
+
 import { EmbeddedStatusContent } from './embedded_status_content';
 
 export type Mention = RecordOf<{ url: string; acct: string }>;
@@ -76,31 +78,9 @@ export const EmbeddedStatus: React.FC<{ statusId: string }> = ({
     [clickCoordinatesRef, statusId, account, history],
   );
 
-  const handleMouseEnter = useCallback<React.MouseEventHandler<HTMLDivElement>>(
-    ({ currentTarget }) => {
-      const emojis =
-        currentTarget.querySelectorAll<HTMLImageElement>('.custom-emoji');
+  const handleMouseEnter = useCallback(handleAnimateEnter, []);
 
-      for (const emoji of emojis) {
-        const newSrc = emoji.getAttribute('data-original');
-        if (newSrc) emoji.src = newSrc;
-      }
-    },
-    [],
-  );
-
-  const handleMouseLeave = useCallback<React.MouseEventHandler<HTMLDivElement>>(
-    ({ currentTarget }) => {
-      const emojis =
-        currentTarget.querySelectorAll<HTMLImageElement>('.custom-emoji');
-
-      for (const emoji of emojis) {
-        const newSrc = emoji.getAttribute('data-static');
-        if (newSrc) emoji.src = newSrc;
-      }
-    },
-    [],
-  );
+  const handleMouseLeave = useCallback(handleAnimateLeave, []);
 
   const handleContentWarningClick = useCallback(() => {
     dispatch(toggleStatusSpoilers(statusId));
@@ -123,7 +103,7 @@ export const EmbeddedStatus: React.FC<{ statusId: string }> = ({
 
   return (
     <div
-      className='notification-group__embedded-status'
+      className='notification-group__embedded-status animate-parent'
       role='button'
       tabIndex={-1}
       onMouseDown={handleMouseDown}