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whippy-edition/app/javascript/mastodon/features/emoji/emoji.js

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import { autoPlayGif } from '../../initial_state';
import unicodeMapping from './emoji_unicode_mapping_light';
import { assetHost } from 'mastodon/utils/config';
import Trie from 'substring-trie';
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const trie = new Trie(Object.keys(unicodeMapping));
// Convert to file names from emojis. (For different variation selector emojis)
const emojiFilenames = (emojis) => {
return emojis.map(v => unicodeMapping[v].filename);
};
// Emoji requiring extra borders depending on theme
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const darkEmoji = emojiFilenames(['🎱', '🐜', '⚫', '🖤', '⬛', '◼️', '◾', '◼️', '✒️', '▪️', '💣', '🎳', '📷', '📸', '♣️', '🕶️', '✴️', '🔌', '💂‍♀️', '📽️', '🍳', '🦍', '💂', '🔪', '🕳️', '🕹️', '🕋', '🖊️', '🖋️', '💂‍♂️', '🎤', '🎓', '🎥', '🎼', '♠️', '🎩', '🦃', '📼', '📹', '🎮', '🐃', '🏴', '🐞', '🕺', '📱', '📲', '🚲']);
const lightEmoji = emojiFilenames(['👽', '⚾', '🐔', '☁️', '💨', '🕊️', '👀', '🍥', '👻', '🐐', '❕', '❔', '⛸️', '🌩️', '🔊', '🔇', '📃', '🌧️', '🐏', '🍚', '🍙', '🐓', '🐑', '💀', '☠️', '🌨️', '🔉', '🔈', '💬', '💭', '🏐', '🏳️', '⚪', '⬜', '◽', '◻️', '▫️']);
const emojiFilename = (filename) => {
const borderedEmoji = (document.body && document.body.classList.contains('theme-mastodon-light')) ? lightEmoji : darkEmoji;
return borderedEmoji.includes(filename) ? (filename + '_border') : filename;
};
const emojifyTextNode = (node, customEmojis) => {
let str = node.textContent;
const fragment = new DocumentFragment();
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for (;;) {
let match, i = 0;
if (customEmojis === null) {
while (i < str.length && !(match = trie.search(str.slice(i)))) {
i += str.codePointAt(i) < 65536 ? 1 : 2;
}
} else {
while (i < str.length && str[i] !== ':' && !(match = trie.search(str.slice(i)))) {
i += str.codePointAt(i) < 65536 ? 1 : 2;
}
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}
let rend, replacement = null;
if (i === str.length) {
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break;
} else if (str[i] === ':') {
if (!(() => {
rend = str.indexOf(':', i + 1) + 1;
if (!rend) return false; // no pair of ':'
const shortname = str.slice(i, rend);
// now got a replacee as ':shortname:'
// if you want additional emoji handler, add statements below which set replacement and return true.
if (shortname in customEmojis) {
const filename = autoPlayGif ? customEmojis[shortname].url : 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;
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}
return false;
})()) rend = ++i;
} else { // matched to unicode emoji
const { filename, shortCode } = unicodeMapping[match];
const title = shortCode ? `:${shortCode}:` : '';
replacement = document.createElement('img');
replacement.setAttribute('draggable', false);
replacement.setAttribute('class', 'emojione');
replacement.setAttribute('alt', match);
replacement.setAttribute('title', title);
replacement.setAttribute('src', `${assetHost}/emoji/${emojiFilename(filename)}.svg`);
rend = i + match.length;
// If the matched character was followed by VS15 (for selecting text presentation), skip it.
if (str.codePointAt(rend) === 65038) {
rend += 1;
}
}
fragment.append(document.createTextNode(str.slice(0, i)));
if (replacement) {
fragment.append(replacement);
}
str = str.slice(rend);
}
fragment.append(document.createTextNode(str));
node.parentElement.replaceChild(fragment, node);
};
const emojifyNode = (node, customEmojis) => {
for (const child of node.childNodes) {
switch(child.nodeType) {
case Node.TEXT_NODE:
emojifyTextNode(child, customEmojis);
break;
case Node.ELEMENT_NODE:
if (!child.classList.contains('invisible'))
emojifyNode(child, customEmojis);
break;
}
}
};
const emojify = (str, customEmojis = {}) => {
const wrapper = document.createElement('div');
wrapper.innerHTML = str;
if (!Object.keys(customEmojis).length)
customEmojis = null;
emojifyNode(wrapper, customEmojis);
return wrapper.innerHTML;
};
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export default emojify;
export const buildCustomEmojis = (customEmojis) => {
const emojis = [];
customEmojis.forEach(emoji => {
const shortcode = emoji.get('shortcode');
const url = autoPlayGif ? emoji.get('url') : emoji.get('static_url');
const name = shortcode.replace(':', '');
emojis.push({
id: name,
name,
short_names: [name],
text: '',
emoticons: [],
keywords: [name],
imageUrl: url,
custom: true,
customCategory: emoji.get('category'),
});
});
return emojis;
};
export const categoriesFromEmojis = customEmojis => customEmojis.reduce((set, emoji) => set.add(emoji.get('category') ? `custom-${emoji.get('category')}` : 'custom'), new Set(['custom']));