mirror of https://framagit.org/tykayn/mastodon.git
51 lines
2.0 KiB
JavaScript
51 lines
2.0 KiB
JavaScript
import { unicodeMapping } from './emojione_light';
|
|
import Trie from 'substring-trie';
|
|
|
|
const trie = new Trie(Object.keys(unicodeMapping));
|
|
|
|
const emojify = (str, customEmojis = {}) => {
|
|
// This walks through the string from start to end, ignoring any tags (<p>, <br>, etc.)
|
|
// and replacing valid unicode strings
|
|
// that _aren't_ within tags with an <img> version.
|
|
// The goal is to be the same as an emojione.regUnicode replacement, but faster.
|
|
let i = -1;
|
|
let insideTag = false;
|
|
let insideShortname = false;
|
|
let shortnameStartIndex = -1;
|
|
let match;
|
|
while (++i < str.length) {
|
|
const char = str.charAt(i);
|
|
if (insideShortname && char === ':') {
|
|
const shortname = str.substring(shortnameStartIndex, i + 1);
|
|
if (shortname in customEmojis) {
|
|
const replacement = `<img draggable="false" class="emojione" alt="${shortname}" title="${shortname}" src="${customEmojis[shortname]}" />`;
|
|
str = str.substring(0, shortnameStartIndex) + replacement + str.substring(i + 1);
|
|
i += (replacement.length - shortname.length - 1); // jump ahead the length we've added to the string
|
|
} else {
|
|
i--;
|
|
}
|
|
insideShortname = false;
|
|
} else if (insideTag && char === '>') {
|
|
insideTag = false;
|
|
} else if (char === '<') {
|
|
insideTag = true;
|
|
insideShortname = false;
|
|
} else if (!insideTag && char === ':') {
|
|
insideShortname = true;
|
|
shortnameStartIndex = i;
|
|
} else if (!insideTag && (match = trie.search(str.substring(i)))) {
|
|
const unicodeStr = match;
|
|
if (unicodeStr in unicodeMapping) {
|
|
const [filename, shortCode] = unicodeMapping[unicodeStr];
|
|
const alt = unicodeStr;
|
|
const replacement = `<img draggable="false" class="emojione" alt="${alt}" title=":${shortCode}:" src="/emoji/${filename}.svg" />`;
|
|
str = str.substring(0, i) + replacement + str.substring(i + unicodeStr.length);
|
|
i += (replacement.length - unicodeStr.length); // jump ahead the length we've added to the string
|
|
}
|
|
}
|
|
}
|
|
return str;
|
|
};
|
|
|
|
export default emojify;
|