107 lines
3.1 KiB
Plaintext
107 lines
3.1 KiB
Plaintext
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import { registerOption } from 'pretty-text/pretty-text';
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import { buildEmojiUrl } from 'pretty-text/emoji';
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import { translations } from 'pretty-text/emoji/data';
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let _unicodeReplacements;
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let _unicodeRegexp;
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export function setUnicodeReplacements(replacements) {
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_unicodeReplacements = replacements;
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if (replacements) {
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_unicodeRegexp = new RegExp(Object.keys(replacements).join("|"), "g");
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}
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};
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function escapeRegExp(s) {
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return s.replace(/[-/\\^$*+?.()|[\]{}]/gi, '\\$&');
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}
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function checkPrev(prev) {
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if (prev && prev.length) {
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const lastToken = prev[prev.length-1];
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if (lastToken && lastToken.charAt) {
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const lastChar = lastToken.charAt(lastToken.length-1);
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if (!/\W/.test(lastChar)) return false;
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}
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}
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return true;
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}
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registerOption((siteSettings, opts, state) => {
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opts.features.emoji = !!siteSettings.enable_emoji;
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opts.emojiSet = siteSettings.emoji_set || "";
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opts.customEmoji = state.customEmoji;
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});
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export function setup(helper) {
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helper.whiteList('img.emoji');
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function imageFor(code) {
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code = code.toLowerCase();
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const url = buildEmojiUrl(code, helper.getOptions());
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if (url) {
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const title = `:${code}:`;
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return ['img', { href: url, title, 'class': 'emoji', alt: title }];
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}
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}
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const translationsWithColon = {};
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Object.keys(translations).forEach(t => {
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if (t[0] === ':') {
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translationsWithColon[t] = translations[t];
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} else {
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const replacement = translations[t];
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helper.inlineReplace(t, (token, match, prev) => {
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return checkPrev(prev) ? imageFor(replacement) : token;
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});
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}
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});
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const translationColonRegexp = new RegExp(Object.keys(translationsWithColon).map(t => `(${escapeRegExp(t)})`).join("|"));
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helper.registerInline(':', (text, match, prev) => {
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const endPos = text.indexOf(':', 1);
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const firstSpace = text.search(/\s/);
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if (!checkPrev(prev)) { return; }
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// If there is no trailing colon, check our translations that begin with colons
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if (endPos === -1 || (firstSpace !== -1 && endPos > firstSpace)) {
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translationColonRegexp.lastIndex = 0;
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const m = translationColonRegexp.exec(text);
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if (m && m[0] && text.indexOf(m[0]) === 0) {
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// Check outer edge
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const lastChar = text.charAt(m[0].length);
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if (lastChar && !/\s/.test(lastChar)) return;
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const contents = imageFor(translationsWithColon[m[0]]);
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if (contents) {
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return [m[0].length, contents];
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}
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}
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return;
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}
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// Simple find and replace from our array
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const between = text.slice(1, endPos);
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const contents = imageFor(between);
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if (contents) {
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return [endPos+1, contents];
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}
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});
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helper.addPreProcessor(text => {
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if (_unicodeReplacements) {
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_unicodeRegexp.lastIndex = 0;
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let m;
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while ((m = _unicodeRegexp.exec(text)) !== null) {
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let replacement = ":" + _unicodeReplacements[m[0]] + ":";
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const before = text.charAt(m.index-1);
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if (!/\B/.test(before)) {
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replacement = "\u200b" + replacement;
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}
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text = text.replace(m[0], replacement);
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}
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}
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return text;
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});
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}
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