mastodon-glitch/app/javascript/mastodon/features/emoji/emoji.js

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import Trie from 'substring-trie';
import { assetHost } from 'mastodon/utils/config';
import { autoPlayGif } from '../../initial_state';
import { unicodeMapping } from './emoji_unicode_mapping_light';
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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
const darkEmoji = emojiFilenames(['🎱', '🐜', '⚫', '🖤', '⬛', '◼️', '◾', '◼️', '✒️', '▪️', '💣', '🎳', '📷', '📸', '♣️', '🕶️', '✴️', '🔌', '💂‍♀️', '📽️', '🍳', '🦍', '💂', '🔪', '🕳️', '🕹️', '🕋', '🖊️', '🖋️', '💂‍♂️', '🎤', '🎓', '🎥', '🎼', '♠️', '🎩', '🦃', '📼', '📹', '🎮', '🐃', '🏴', '🐞', '🕺', '📱', '📲', '🚲', '🪮', '🐦‍⬛']);
const lightEmoji = emojiFilenames(['👽', '⚾', '🐔', '☁️', '💨', '🕊️', '👀', '🍥', '👻', '🐐', '❕', '❔', '⛸️', '🌩️', '🔊', '🔇', '📃', '🌧️', '🐏', '🍚', '🍙', '🐓', '🐑', '💀', '☠️', '🌨️', '🔉', '🔈', '💬', '💭', '🏐', '🏳️', '⚪', '⬜', '◽', '◻️', '▫️', '🪽', '🪿']);
/**
* @param {string} filename
* @param {"light" | "dark" } colorScheme
* @returns {string}
*/
const emojiFilename = (filename, colorScheme) => {
const borderedEmoji = colorScheme === "light" ? lightEmoji : darkEmoji;
return borderedEmoji.includes(filename) ? (filename + '_border') : filename;
};
const emojifyTextNode = (node, customEmojis) => {
const VS15 = 0xFE0E;
const VS16 = 0xFE0F;
let str = node.textContent;
const fragment = new DocumentFragment();
let i = 0;
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for (;;) {
let unicode_emoji;
// Skip to the next potential emoji to replace (either custom emoji or custom emoji :shortcode:
if (customEmojis === null) {
while (i < str.length && !(unicode_emoji = trie.search(str.slice(i)))) {
i += str.codePointAt(i) < 65536 ? 1 : 2;
}
} else {
while (i < str.length && str[i] !== ':' && !(unicode_emoji = trie.search(str.slice(i)))) {
i += str.codePointAt(i) < 65536 ? 1 : 2;
}
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}
// We reached the end of the string, nothing to replace
if (i === str.length) {
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break;
}
let rend, replacement = null;
if (str[i] === ':') { // Potentially the start of a custom emoji :shortcode:
rend = str.indexOf(':', i + 1) + 1;
// no matching ending ':', skip
if (!rend) {
i++;
continue;
}
const shortcode = str.slice(i, rend);
const custom_emoji = customEmojis[shortcode];
// not a recognized shortcode, skip
if (!custom_emoji) {
i++;
continue;
}
// now got a replacee as ':shortcode:'
// if you want additional emoji handler, add statements below which set replacement and return true.
const filename = autoPlayGif ? custom_emoji.url : custom_emoji.static_url;
replacement = document.createElement('img');
replacement.setAttribute('draggable', 'false');
replacement.setAttribute('class', 'emojione custom-emoji');
replacement.setAttribute('alt', shortcode);
replacement.setAttribute('title', shortcode);
replacement.setAttribute('src', filename);
replacement.setAttribute('data-original', custom_emoji.url);
replacement.setAttribute('data-static', custom_emoji.static_url);
} else { // start of an unicode emoji
rend = i + unicode_emoji.length;
// If the matched character was followed by VS15 (for selecting text presentation), skip it.
if (str.codePointAt(rend - 1) !== VS16 && str.codePointAt(rend) === VS15) {
i = rend + 1;
continue;
}
const { filename, shortCode } = unicodeMapping[unicode_emoji];
const title = shortCode ? `:${shortCode}:` : '';
replacement = document.createElement('picture');
const isSystemTheme = !!document.body?.classList.contains('theme-system');
if(isSystemTheme) {
let source = document.createElement('source');
source.setAttribute('media', '(prefers-color-scheme: dark)');
source.setAttribute('srcset', `${assetHost}/emoji/${emojiFilename(filename, "dark")}.svg`);
replacement.appendChild(source);
}
let img = document.createElement('img');
img.setAttribute('draggable', 'false');
img.setAttribute('class', 'emojione');
img.setAttribute('alt', unicode_emoji);
img.setAttribute('title', title);
let theme = "light";
if(!isSystemTheme && !document.body?.classList.contains('theme-mastodon-light'))
theme = "dark";
img.setAttribute('src', `${assetHost}/emoji/${emojiFilename(filename, theme)}.svg`);
replacement.appendChild(img);
}
// Add the processed-up-to-now string and the emoji replacement
fragment.append(document.createTextNode(str.slice(0, i)));
fragment.append(replacement);
str = str.slice(rend);
i = 0;
}
fragment.append(document.createTextNode(str));
node.parentElement.replaceChild(fragment, node);
};
const emojifyNode = (node, customEmojis) => {
for (const child of node.childNodes) {
switch(child.nodeType) {
case Node.TEXT_NODE:
emojifyTextNode(child, customEmojis);
break;
case Node.ELEMENT_NODE:
if (!child.classList.contains('invisible'))
emojifyNode(child, customEmojis);
break;
}
}
};
const emojify = (str, customEmojis = {}) => {
const wrapper = document.createElement('div');
wrapper.innerHTML = str;
if (!Object.keys(customEmojis).length)
customEmojis = null;
emojifyNode(wrapper, customEmojis);
return wrapper.innerHTML;
};
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export default emojify;
export const buildCustomEmojis = (customEmojis) => {
const emojis = [];
customEmojis.forEach(emoji => {
const shortcode = emoji.get('shortcode');
const url = autoPlayGif ? emoji.get('url') : emoji.get('static_url');
const name = shortcode.replace(':', '');
emojis.push({
id: name,
name,
short_names: [name],
text: '',
emoticons: [],
keywords: [name],
imageUrl: url,
custom: true,
customCategory: emoji.get('category'),
});
});
return emojis;
};
export const categoriesFromEmojis = customEmojis => customEmojis.reduce((set, emoji) => set.add(emoji.get('category') ? `custom-${emoji.get('category')}` : 'custom'), new Set(['custom']));