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Remove use of DOMParser in front-end emoji rewriting code (#20758)

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* Add jstest for node ordering in emojify

* Remove use of DOMParser in front-end emoji rewriting code
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Claire 2022-11-17 11:24:59 +01:00 committed by GitHub
parent 4f15fd0ba1
commit 585cc1a604
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2 changed files with 21 additions and 7 deletions
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5
app/javascript/mastodon/features/emoji/__tests__/emoji-test.js
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@ -88,5 +88,10 @@ describe('emoji', () => {
expect(emojify('💂‍♀️💂‍♂️')) expect(emojify('💂‍♀️💂‍♂️'))
.toEqual('<img draggable="false" class="emojione" alt="💂\u200D♀️" title=":female-guard:" src="/emoji/1f482-200d-2640-fe0f_border.svg"><img draggable="false" class="emojione" alt="💂\u200D♂️" title=":male-guard:" src="/emoji/1f482-200d-2642-fe0f_border.svg">'); .toEqual('<img draggable="false" class="emojione" alt="💂\u200D♀️" title=":female-guard:" src="/emoji/1f482-200d-2640-fe0f_border.svg"><img draggable="false" class="emojione" alt="💂\u200D♂️" title=":male-guard:" src="/emoji/1f482-200d-2642-fe0f_border.svg">');
}); });
it('keeps ordering as expected (issue fixed by PR 20677)', () => {
expect(emojify('<p>💕 <a class="hashtag" href="https://example.com/tags/foo" rel="nofollow noopener noreferrer" target="_blank">#<span>foo</span></a> test: foo.</p>'))
.toEqual('<p><img draggable="false" class="emojione" alt="💕" title=":two_hearts:" src="/emoji/1f495.svg"> <a class="hashtag" href="https://example.com/tags/foo" rel="nofollow noopener noreferrer" target="_blank">#<span>foo</span></a> test: foo.</p>');
});
}); });
}); });

23
app/javascript/mastodon/features/emoji/emoji.js
View file

@ -19,8 +19,6 @@ const emojiFilename = (filename) => {
return borderedEmoji.includes(filename) ? (filename + '_border') : filename; return borderedEmoji.includes(filename) ? (filename + '_border') : filename;
}; };
const domParser = new DOMParser();
const emojifyTextNode = (node, customEmojis) => { const emojifyTextNode = (node, customEmojis) => {
let str = node.textContent; let str = node.textContent;
@ -39,7 +37,7 @@ const emojifyTextNode = (node, customEmojis) => {
} }
} }
let rend, replacement = ''; let rend, replacement = null;
if (i === str.length) { if (i === str.length) {
break; break;
} else if (str[i] === ':') { } else if (str[i] === ':') {
@ -51,7 +49,14 @@ const emojifyTextNode = (node, customEmojis) => {
// if you want additional emoji handler, add statements below which set replacement and return true. // if you want additional emoji handler, add statements below which set replacement and return true.
if (shortname in customEmojis) { if (shortname in customEmojis) {
const filename = autoPlayGif ? customEmojis[shortname].url : customEmojis[shortname].static_url; const filename = autoPlayGif ? customEmojis[shortname].url : customEmojis[shortname].static_url;
replacement = `<img draggable="false" class="emojione custom-emoji" alt="${shortname}" title="${shortname}" src="${filename}" data-original="${customEmojis[shortname].url}" data-static="${customEmojis[shortname].static_url}" />`; replacement = document.createElement('img');
replacement.setAttribute('draggable', false);
replacement.setAttribute('class', 'emojione custom-emoji');
replacement.setAttribute('alt', shortname);
replacement.setAttribute('title', shortname);
replacement.setAttribute('src', filename);
replacement.setAttribute('data-original', customEmojis[shortname].url);
replacement.setAttribute('data-static', customEmojis[shortname].static_url);
return true; return true;
} }
return false; return false;
@ -59,7 +64,12 @@ const emojifyTextNode = (node, customEmojis) => {
} else { // matched to unicode emoji } else { // matched to unicode emoji
const { filename, shortCode } = unicodeMapping[match]; const { filename, shortCode } = unicodeMapping[match];
const title = shortCode ? `:${shortCode}:` : ''; const title = shortCode ? `:${shortCode}:` : '';
replacement = `<img draggable="false" class="emojione" alt="${match}" title="${title}" src="${assetHost}/emoji/${emojiFilename(filename)}.svg" />`; replacement = document.createElement('img');
replacement.setAttribute('draggable', false);
replacement.setAttribute('class', 'emojione');
replacement.setAttribute('alt', match);
replacement.setAttribute('title', title);
replacement.setAttribute('src', `${assetHost}/emoji/${emojiFilename(filename)}.svg`);
rend = i + match.length; rend = i + match.length;
// If the matched character was followed by VS15 (for selecting text presentation), skip it. // If the matched character was followed by VS15 (for selecting text presentation), skip it.
if (str.codePointAt(rend) === 65038) { if (str.codePointAt(rend) === 65038) {
@ -69,9 +79,8 @@ const emojifyTextNode = (node, customEmojis) => {
fragment.append(document.createTextNode(str.slice(0, i))); fragment.append(document.createTextNode(str.slice(0, i)));
if (replacement) { if (replacement) {
fragment.append(domParser.parseFromString(replacement, 'text/html').documentElement.getElementsByTagName('img')[0]); fragment.append(replacement);
} }
node.textContent = str.slice(0, i);
str = str.slice(rend); str = str.slice(rend);
} }