56 lines
2.5 KiB
JavaScript
56 lines
2.5 KiB
JavaScript
import emojione from 'emojione';
|
|
import Trie from 'substring-trie';
|
|
|
|
const mappedUnicode = emojione.mapUnicodeToShort();
|
|
const trie = new Trie(Object.keys(emojione.jsEscapeMap));
|
|
|
|
function emojify(str) {
|
|
// This walks through the string from start to end, ignoring any tags (<p>, <br>, etc.)
|
|
// and replacing valid shortnames like :smile: and :wink: as well as unicode strings
|
|
// that _aren't_ within tags with an <img> version.
|
|
// The goal is to be the same as an emojione.regShortNames/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 emojione.emojioneList) {
|
|
const unicode = emojione.emojioneList[shortname].unicode[emojione.emojioneList[shortname].unicode.length - 1];
|
|
const alt = emojione.convert(unicode.toUpperCase());
|
|
const replacement = `<img draggable="false" class="emojione" alt="${alt}" title="${shortname}" src="/emoji/${unicode}.svg" />`;
|
|
str = str.substring(0, shortnameStartIndex) + replacement + str.substring(i + 1);
|
|
i += (replacement.length - shortname.length - 1); // jump ahead the length we've added to the string
|
|
} else {
|
|
i--; // stray colon, try again
|
|
}
|
|
insideShortname = false;
|
|
} else if (insideTag && char === '>') {
|
|
insideTag = false;
|
|
} else if (char === '<') {
|
|
insideTag = true;
|
|
insideShortname = false;
|
|
} else if (!insideTag && char === ':') {
|
|
insideShortname = true;
|
|
shortnameStartIndex = i;
|
|
} else if (!insideTag && (match = trie.search(str.substring(i)))) {
|
|
const unicodeStr = match;
|
|
if (unicodeStr in emojione.jsEscapeMap) {
|
|
const unicode = emojione.jsEscapeMap[unicodeStr];
|
|
const short = mappedUnicode[unicode];
|
|
const filename = emojione.emojioneList[short].fname;
|
|
const alt = emojione.convert(unicode.toUpperCase());
|
|
const replacement = `<img draggable="false" class="emojione" alt="${alt}" title="${short}" src="/emoji/${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;
|