mirror of
https://github.com/twitter/twemoji.git
synced 2024-11-16 11:18:37 +00:00
815 lines
29 KiB
JavaScript
Executable File
815 lines
29 KiB
JavaScript
Executable File
#!/usr/bin/env node
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/*! Copyright Twitter Inc. and other contributors. Licensed under MIT *//*
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https://github.com/twitter/twemoji/blob/gh-pages/LICENSE
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*/
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// dependencies
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var fs = require('fs');
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var http = require('http');
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// Twitter assets by property name
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var assets = {
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'16x16': [],
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'36x36': [],
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'72x72': []
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};
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// white spaces we don't want to catch via the RegExp
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// there is no asset equivalent for these
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var ignoreMissing = ['2002', '2003', '2005'];
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// basic utility to organize async code
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// see: http://webreflection.blogspot.co.uk/2012/03/tweet-sized-queue-system.html
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// or: http://webreflection.blogspot.co.uk/2012/06/working-with-queues.html
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function Queue(args, f) {
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setTimeout(args.next = function next() {
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return (f = args.shift()) ? !!f(args) || !0 : !1;
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}, 0);
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return args;
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}
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// main task
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Queue([
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// will populate assets arrays
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function grabAllAssets(q) {
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console.log('analyzing all assets ... ');
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// per each path/folder
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Object.keys(assets).forEach(function (path, i, paths) {
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// grab all files in that folder
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fs.readdir('./' + path, function (err, files) {
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// and add them to the assets path
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assets[path].push.apply(
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assets[path],
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files.map(upperCaseWithoutExtension)
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);
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// once all assets arrays have been populated
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if (paths.reduce(completed, true)) {
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console.log('[INFO] assets contains ' + assets[path].length + ' emoji.');
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q.next();
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}
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});
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});
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// drop extension + uppercase
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function upperCaseWithoutExtension(file) {
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return file.slice(0, file.lastIndexOf('.')).toUpperCase();
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}
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// returns true if all assets have been populated
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function completed(p, c) {
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return p && assets[c].length;
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}
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},
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// will fetch and store all emoji from unicode.org
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function fetchEmojiSources(q) {
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console.log('fetching EmojiSources.txt ... ');
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// grab all emoji and test them against them
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http.get("http://www.unicode.org/Public/UNIDATA/EmojiSources.txt", function (res) {
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var chunks = [];
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// if all good ...
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if (res.statusCode === 200) {
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// grab all data
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res.on('data', chunks.push.bind(chunks));
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// once done ...
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res.on('end', function () {
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console.log('analizing EmojiSources VS our assets ... ');
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// store all missing assets in one object
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var missing = {};
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// will be used to store an array with all missing
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var missingGrouped = {};
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// will be needed later on
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// parse it, clean it, and store it once
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q.emojiSource = chunks
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.join('')
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.split(/\r\n|\r|\n/)
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// filter once
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.filter(function (line) {
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return this.test(line);
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}, /^[0-9A-F]/)
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// take only emoji info
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.map(function (codePoint) {
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return codePoint
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.slice(0, codePoint.indexOf(';'))
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.toUpperCase()
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// drop spaces
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.replace(/\s+/g, '-')
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// drop 0 padded prefixes
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.replace(/^0+/g, '');
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});
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console.log('[INFO] parsed ' + q.emojiSource.length + ' standard emoji.');
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// find out which one is missing from our assets
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q.emojiSource.forEach(
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function (emoji) {
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// do not loop for emoji we know we should ignore
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if (ignoreMissing.indexOf(emoji) < 0) {
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// verify all others per each folder
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this.forEach(function (path) {
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if (assets[path].indexOf(emoji) < 0) {
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(missing[path] || (missing[path] = [])).push(emoji);
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missingGrouped[emoji] = true;
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}
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});
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}
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},
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// and per each folder
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Object.keys(assets)
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);
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// if some missing emoji has been found
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if (Object.keys(missing).length) {
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// warn and show which one is missing
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console.warn('[WARNING] missing assets for:');
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console.log(missing);
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}
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// create the array of all emoji we should ignore
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q.ignore = ignoreMissing.concat(Object.keys(missingGrouped));
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q.next();
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});
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} else {
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console.error('[ERROR] unable to fetch emoji at unicode.org');
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process.exit(1);
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}
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});
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},
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// grab the list of emoji that behave differently when
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// variants such \uFE0E and \uFE0F are in place
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function grabStandardVariants(q) {
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console.log('fetching StandardizedVariants.txt ... ');
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http.get(
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"http://unicode.org/Public/UNIDATA/StandardizedVariants.txt",
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function(res) {
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var chunks = [];
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if (res.statusCode == 200) {
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res.on('data', chunks.push.bind(chunks));
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res.on('end', function () {
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// cleaning up parsing sensitive emoji
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q.variantsSensitive = chunks
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.join('') // all content
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.split(/\r\n|\r|\n/) // split in lines
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.filter(function (line) { // containing FE0E; info
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return this.test(line); // avoiding duplicated with FE0F
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}, / FE0E; text style/)
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.map(function (line) { // cleaned up to grab
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return line.replace(this, '$1') // only first unicode
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.toUpperCase(); // normalized as uppercase
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}, /^([0-9A-F]{4,}) FE0E;.+$/) // sensitive char
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;
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console.log('[INFO] parsed ' + q.variantsSensitive.length + ' variant sensitive emoji.');
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q.next();
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});
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} else {
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console.error('[ERROR] unable to fetch standard variants at unicode.org');
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process.exit(1);
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}
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}
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);
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},
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// add our own assets that are not part of the Unicode standard
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function addMissingEmojiAndSort(q) {
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q.nonStandard = [];
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Object.keys(assets).forEach(function (path, i) {
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assets[path].forEach(function (emoji) {
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if (
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q.emojiSource.indexOf(emoji) < 0 &&
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q.variantsSensitive.indexOf(emoji) < 0 &&
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q.nonStandard.indexOf(emoji) < 0
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) {
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q.nonStandard.push(emoji);
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}
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});
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});
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if (q.nonStandard.length) {
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console.warn('[WARNING] assets contain ' + q.nonStandard.length + ' non standard emoji:');
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// console.log(q.nonStandard.join(', '));
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}
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// order by sequence of chars length
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q.emojiSource = q.emojiSource.concat(q.nonStandard).sort(sort);
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// actually this is not needed
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// q.variantsSensitive.sort(sort);
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q.next();
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function sort(a, b) {
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var diff = b.length - a.length;
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if (diff) return diff;
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return parseInt(b.split('-')[0], 10) -
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parseInt(a.split('-')[0], 10)
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}
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},
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// with all info, generate a RegExp that will catch
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// only standard emoji that are present in our assets
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function generateRegExp(q) {
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console.log('generating a RegExp for available assets');
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var sensitive = [];
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var regular = [];
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q.emojiSource.forEach(function (codePoint) {
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var u;
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if (q.ignore.indexOf(codePoint) < 0) {
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u = codePoint.split('-').map(toJSON).join('');
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if (q.variantsSensitive.indexOf(codePoint) < 0) {
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regular.push(u);
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} else {
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sensitive.push(u);
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}
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}
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});
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// create a RegExp with properly ordered matches
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q.re = '((?:' +
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regular.join('|') + ')|(?:(?:' +
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sensitive.join('|') +
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')([\\uFE0E\\uFE0F]?)))';
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q.next();
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// basic utilities to convert codepoints to JSON strings
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function toJSON(point) {
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return UTF162JSON(fromCodePoint(point));
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}
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function fromCodePoint(codepoint) {
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var code = typeof codepoint === 'string' ?
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parseInt(codepoint, 16) : codepoint;
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if (code < 0x10000) {
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return String.fromCharCode(code);
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}
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code -= 0x10000;
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return String.fromCharCode(
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0xD800 + (code >> 10),
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0xDC00 + (code & 0x3FF)
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);
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}
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function UTF162JSON(text) {
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for (var i = 0, r = []; i < text.length; i++) {
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r.push('\\u' + ('000' + text.charCodeAt(i).toString(16)).slice(-4));
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}
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return r.join('');
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}
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},
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function generateFile(q) {
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console.log('generating ./twemoji.js');
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createTwemoji(q.re);
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require('child_process').spawn('node', ['twemoji-dist.js']);
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}
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]);
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function createTwemoji(re) {
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fs.writeFileSync(
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'twemoji.js',
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'/*jslint indent: 2, browser: true, bitwise: true, plusplus: true */\n' +
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'var twemoji = (' +
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function (
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/*! Copyright Twitter Inc. and other contributors. Licensed under MIT *//*
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https://github.com/twitter/twemoji/blob/gh-pages/LICENSE
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*/
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// WARNING: this file is generated automatically via
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// `node twemoji-generator.js`
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// please update its `createTwemoji` function
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// at the bottom of the same file instead.
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) {
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'use strict';
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/*jshint maxparams:4 */
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var
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// the exported module object
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twemoji = {
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/////////////////////////
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// properties //
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/////////////////////////
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// default assets url, by default will be Twitter Inc. CDN
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base: (location.protocol === 'https:' ? 'https:' : 'http:') +
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'//twemoji.maxcdn.com/',
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// default assets file extensions, by default '.png'
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ext: '.png',
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// default assets/folder size, by default "36x36"
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// available via Twitter CDN: 16, 36, 72
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size: '36x36',
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// default class name, by default 'emoji'
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className: 'emoji',
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// basic utilities / helpers to convert code points
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// to JavaScript surrogates and vice versa
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convert: {
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/**
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* Given an HEX codepoint, returns UTF16 surrogate pairs.
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*
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* @param string generic codepoint, i.e. '1F4A9'
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* @return string codepoint transformed into utf16 surrogates pair,
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* i.e. \uD83D\uDCA9
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*
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* @example
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* twemoji.convert.fromCodePoint('1f1e8');
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* // "\ud83c\udde8"
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*
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* '1f1e8-1f1f3'.split('-').map(twemoji.convert.fromCodePoint).join('')
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* // "\ud83c\udde8\ud83c\uddf3"
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*/
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fromCodePoint: fromCodePoint,
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/**
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* Given UTF16 surrogate pairs, returns the equivalent HEX codepoint.
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*
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* @param string generic utf16 surrogates pair, i.e. \uD83D\uDCA9
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* @param string optional separator for double code points, default='-'
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* @return string utf16 transformed into codepoint, i.e. '1F4A9'
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*
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* @example
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* twemoji.convert.toCodePoint('\ud83c\udde8\ud83c\uddf3');
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* // "1f1e8-1f1f3"
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*
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* twemoji.convert.toCodePoint('\ud83c\udde8\ud83c\uddf3', '~');
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* // "1f1e8~1f1f3"
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*/
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toCodePoint: toCodePoint
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},
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/////////////////////////
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// methods //
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/////////////////////////
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/**
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* User first: used to remove missing images
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* preserving the original text intent when
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* a fallback for network problems is desired.
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* Automatically added to Image nodes via DOM
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* It could be recycled for string operations via:
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* $('img.emoji').on('error', twemoji.onerror)
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*/
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onerror: function onerror() {
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if (this.parentNode) {
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this.parentNode.replaceChild(createText(this.alt), this);
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}
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},
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/**
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* Main method/logic to generate either <img> tags or HTMLImage nodes.
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* "emojify" a generic text or DOM Element.
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*
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* @overloads
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*
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* String replacement for `innerHTML` or server side operations
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* twemoji.parse(string);
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* twemoji.parse(string, Function);
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* twemoji.parse(string, Object);
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*
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* HTMLElement tree parsing for safer operations over existing DOM
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* twemoji.parse(HTMLElement);
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* twemoji.parse(HTMLElement, Function);
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* twemoji.parse(HTMLElement, Object);
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*
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* @param string|HTMLElement the source to parse and enrich with emoji.
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*
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* string replace emoji matches with <img> tags.
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* Mainly used to inject emoji via `innerHTML`
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* It does **not** parse the string or validate it,
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* it simply replaces found emoji with a tag.
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* NOTE: be sure this won't affect security.
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*
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* HTMLElement walk through the DOM tree and find emoji
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* that are inside **text node only** (nodeType === 3)
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* Mainly used to put emoji in already generated DOM
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* without compromising surrounding nodes and
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* **avoiding** the usage of `innerHTML`.
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* NOTE: Using DOM elements instead of strings should
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* improve security without compromising too much
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* performance compared with a less safe `innerHTML`.
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*
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* @param Function|Object [optional]
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* either the callback that will be invoked or an object
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* with all properties to use per each found emoji.
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*
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* Function if specified, this will be invoked per each emoji
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* that has been found through the RegExp except
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* those follwed by the invariant \uFE0E ("as text").
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* Once invoked, parameters will be:
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*
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* codePoint:string the lower case HEX code point
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* i.e. "1f4a9"
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*
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* options:Object all info for this parsing operation
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*
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* variant:char the optional \uFE0F ("as image")
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* variant, in case this info
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* is anyhow meaningful.
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* By default this is ignored.
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*
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* If such callback will return a falsy value instead
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* of a valid `src` to use for the image, nothing will
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* actually change for that specific emoji.
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*
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*
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* Object if specified, an object containing the following properties
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*
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* callback Function the callback to invoke per each found emoji.
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* base string the base url, by default twemoji.base
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* ext string the image extension, by default twemoji.ext
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* size string the assets size, by default twemoji.size
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*
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* @example
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*
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* twemoji.parse("I \u2764\uFE0F emoji!");
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* // I <img class="emoji" draggable="false" alt="❤️" src="/assets/2764.gif"> emoji!
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*
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*
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* twemoji.parse("I \u2764\uFE0F emoji!", function(icon, options, variant) {
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* return '/assets/' + icon + '.gif';
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* });
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* // I <img class="emoji" draggable="false" alt="❤️" src="/assets/2764.gif"> emoji!
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*
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*
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* twemoji.parse("I \u2764\uFE0F emoji!", {
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* size: 72,
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* callback: function(icon, options, variant) {
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* return '/assets/' + options.size + '/' + icon + options.ext;
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* }
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* });
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* // I <img class="emoji" draggable="false" alt="❤️" src="/assets/72x72/2764.png"> emoji!
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*
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*/
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parse: parse,
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/**
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* Given a string, invokes the callback argument
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* per each emoji found in such string.
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* This is the most raw version used by
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* the .parse(string) method itself.
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*
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* @param string generic string to parse
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* @param Function a generic callback that will be
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* invoked to replace the content.
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* This calback wil receive standard
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* String.prototype.replace(str, callback)
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* arguments such:
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* callback(
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* match, // the emoji match
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* icon, // the emoji text (same as text)
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* variant // either '\uFE0E' or '\uFE0F', if present
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* );
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*
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* and others commonly received via replace.
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*
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* NOTE: When the variant \uFE0E is found, remember this is an explicit intent
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* from the user: the emoji should **not** be replaced with an image.
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* In \uFE0F case one, it's the opposite, it should be graphic.
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* This utility convetion is that only \uFE0E are not translated into images.
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*/
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replace: replace,
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/**
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* Simplify string tests against emoji.
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*
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* @param string some text that might contain emoji
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* @return boolean true if any emoji was found, false otherwise.
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*
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* @example
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*
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* if (twemoji.test(someContent)) {
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* console.log("emoji All The Things!");
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* }
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*/
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test: test
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},
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// RegExp based on emoji's official Unicode standards
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// http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
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re = /twemoji/,
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// nodes with type 1 which should **not** be parsed
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shouldntBeParsed = /IFRAME|NOFRAMES|NOSCRIPT|SCRIPT|SELECT|STYLE|TEXTAREA/,
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|
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// just a private shortcut
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fromCharCode = String.fromCharCode;
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return twemoji;
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/////////////////////////
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// private functions //
|
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// declaration //
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/////////////////////////
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/**
|
|
* Shortcut to create text nodes
|
|
* @param string text used to create DOM text node
|
|
* @return Node a DOM node with that text
|
|
*/
|
|
function createText(text) {
|
|
return document.createTextNode(text);
|
|
}
|
|
|
|
/**
|
|
* Default callback used to generate emoji src
|
|
* based on Twitter CDN
|
|
* @param string the emoji codepoint string
|
|
* @param string the default size to use, i.e. "36x36"
|
|
* @param string optional "\uFE0F" variant char, ignored by default
|
|
* @return string the image source to use
|
|
*/
|
|
function defaultImageSrcGenerator(icon, options) {
|
|
return ''.concat(options.base, options.size, '/', icon, options.ext);
|
|
}
|
|
|
|
/**
|
|
* Given a generic DOM nodeType 1, walk through all children
|
|
* and store every nodeType 3 (#text) found in the tree.
|
|
* @param Element a DOM Element with probably some text in it
|
|
* @param Array the list of previously discovered text nodes
|
|
* @return Array same list with new discovered nodes, if any
|
|
*/
|
|
function grabAllTextNodes(node, allText) {
|
|
var
|
|
childNodes = node.childNodes,
|
|
length = childNodes.length,
|
|
subnode,
|
|
nodeType;
|
|
while (length--) {
|
|
subnode = childNodes[length];
|
|
nodeType = subnode.nodeType;
|
|
// parse emoji only in text nodes
|
|
if (nodeType === 3) {
|
|
// collect them to process emoji later
|
|
allText.push(subnode);
|
|
}
|
|
// ignore all nodes that are not type 1 or that
|
|
// should not be parsed as script, style, and others
|
|
else if (nodeType === 1 && !shouldntBeParsed.test(subnode.nodeName)) {
|
|
grabAllTextNodes(subnode, allText);
|
|
}
|
|
}
|
|
return allText;
|
|
}
|
|
|
|
/**
|
|
* Used to both remove the possible variant
|
|
* and to convert utf16 into code points
|
|
* @param string the emoji surrogate pair
|
|
* @param string the optional variant char, if any
|
|
*/
|
|
function grabTheRightIcon(icon, variant) {
|
|
// if variant is present as \uFE0F
|
|
return toCodePoint(
|
|
variant === '\uFE0F' ?
|
|
// the icon should not contain it
|
|
icon.slice(0, -1) :
|
|
// fix non standard OSX behavior
|
|
(icon.length === 3 && icon.charAt(1) === '\uFE0F' ?
|
|
icon.charAt(0) + icon.charAt(2) : icon)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* DOM version of the same logic / parser:
|
|
* emojify all found sub-text nodes placing images node instead.
|
|
* @param Element generic DOM node with some text in some child node
|
|
* @param Object options containing info about how to parse
|
|
*
|
|
* .callback Function the callback to invoke per each found emoji.
|
|
* .base string the base url, by default twemoji.base
|
|
* .ext string the image extension, by default twemoji.ext
|
|
* .size string the assets size, by default twemoji.size
|
|
*
|
|
* @return Element same generic node with emoji in place, if any.
|
|
*/
|
|
function parseNode(node, options) {
|
|
var
|
|
allText = grabAllTextNodes(node, []),
|
|
length = allText.length,
|
|
modified,
|
|
fragment,
|
|
subnode,
|
|
text,
|
|
match,
|
|
i,
|
|
index,
|
|
img,
|
|
alt,
|
|
icon,
|
|
variant,
|
|
src;
|
|
while (length--) {
|
|
modified = false;
|
|
fragment = document.createDocumentFragment();
|
|
subnode = allText[length];
|
|
text = subnode.nodeValue;
|
|
i = 0;
|
|
while ((match = re.exec(text))) {
|
|
index = match.index;
|
|
if (index !== i) {
|
|
fragment.appendChild(
|
|
createText(text.slice(i, index))
|
|
);
|
|
}
|
|
alt = match[0];
|
|
icon = match[1];
|
|
variant = match[2];
|
|
i = index + alt.length;
|
|
if (variant !== '\uFE0E') {
|
|
src = options.callback(
|
|
grabTheRightIcon(icon, variant),
|
|
options,
|
|
variant
|
|
);
|
|
if (src) {
|
|
img = new Image();
|
|
img.onerror = twemoji.onerror;
|
|
img.className = options.className;
|
|
img.setAttribute('draggable', 'false');
|
|
img.alt = alt;
|
|
img.src = src;
|
|
modified = true;
|
|
fragment.appendChild(img);
|
|
}
|
|
}
|
|
if (!img) fragment.appendChild(createText(alt));
|
|
img = null;
|
|
}
|
|
// is there actually anything to replace in here ?
|
|
if (modified) {
|
|
// any text left to be added ?
|
|
if (i < text.length) {
|
|
fragment.appendChild(
|
|
createText(text.slice(i))
|
|
);
|
|
}
|
|
// replace the text node only, leave intact
|
|
// anything else surrounding such text
|
|
subnode.parentNode.replaceChild(fragment, subnode);
|
|
}
|
|
}
|
|
return node;
|
|
}
|
|
|
|
/**
|
|
* String/HTML version of the same logic / parser:
|
|
* emojify a generic text placing images tags instead of surrogates pair.
|
|
* @param string generic string with possibly some emoji in it
|
|
* @param Object options containing info about how to parse
|
|
*
|
|
* .callback Function the callback to invoke per each found emoji.
|
|
* .base string the base url, by default twemoji.base
|
|
* .ext string the image extension, by default twemoji.ext
|
|
* .size string the assets size, by default twemoji.size
|
|
*
|
|
* @return the string with <img tags> replacing all found and parsed emoji
|
|
*/
|
|
function parseString(str, options) {
|
|
return replace(str, function (match, icon, variant) {
|
|
var src;
|
|
// verify the variant is not the FE0E one
|
|
// this variant means "emoji as text" and should not
|
|
// require any action/replacement
|
|
// http://unicode.org/Public/UNIDATA/StandardizedVariants.html
|
|
if (variant !== '\uFE0E') {
|
|
src = options.callback(
|
|
grabTheRightIcon(icon, variant),
|
|
options,
|
|
variant
|
|
);
|
|
if (src) {
|
|
// recycle the match string replacing the emoji
|
|
// with its image counter part
|
|
match = '<img '.concat(
|
|
'class="', options.className, '" ',
|
|
'draggable="false" ',
|
|
// needs to preserve user original intent
|
|
// when variants should be copied and pasted too
|
|
'alt="',
|
|
match,
|
|
'" ',
|
|
'src="',
|
|
src,
|
|
'"',
|
|
'>'
|
|
);
|
|
}
|
|
}
|
|
return match;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Given a generic value, creates its squared counterpart if it's a number.
|
|
* As example, number 36 will return '36x36'.
|
|
* @param any a generic value.
|
|
* @return any a string representing asset size, i.e. "36x36"
|
|
* only in case the value was a number.
|
|
* Returns initial value otherwise.
|
|
*/
|
|
function toSizeSquaredAsset(value) {
|
|
return typeof value === 'number' ?
|
|
value + 'x' + value :
|
|
value;
|
|
}
|
|
|
|
|
|
/////////////////////////
|
|
// exported functions //
|
|
// declaration //
|
|
/////////////////////////
|
|
|
|
function fromCodePoint(codepoint) {
|
|
var code = typeof codepoint === 'string' ?
|
|
parseInt(codepoint, 16) : codepoint;
|
|
if (code < 0x10000) {
|
|
return fromCharCode(code);
|
|
}
|
|
code -= 0x10000;
|
|
return fromCharCode(
|
|
0xD800 + (code >> 10),
|
|
0xDC00 + (code & 0x3FF)
|
|
);
|
|
}
|
|
|
|
function parse(what, how) {
|
|
if (!how || typeof how === 'function') {
|
|
how = {callback: how};
|
|
}
|
|
// if first argument is string, inject html <img> tags
|
|
// otherwise use the DOM tree and parse text nodes only
|
|
return (typeof what === 'string' ? parseString : parseNode)(what, {
|
|
callback: how.callback || defaultImageSrcGenerator,
|
|
base: typeof how.base === 'string' ? how.base : twemoji.base,
|
|
ext: how.ext || twemoji.ext,
|
|
size: how.folder || toSizeSquaredAsset(how.size || twemoji.size),
|
|
className:how.className || twemoji.className
|
|
});
|
|
}
|
|
|
|
function replace(text, callback) {
|
|
return String(text).replace(re, callback);
|
|
}
|
|
|
|
function test(text) {
|
|
// IE6 needs a reset before too
|
|
re.lastIndex = 0;
|
|
var result = re.test(text);
|
|
re.lastIndex = 0;
|
|
return result;
|
|
}
|
|
|
|
function toCodePoint(unicodeSurrogates, sep) {
|
|
var
|
|
r = [],
|
|
c = 0,
|
|
p = 0,
|
|
i = 0;
|
|
while (i < unicodeSurrogates.length) {
|
|
c = unicodeSurrogates.charCodeAt(i++);
|
|
if (p) {
|
|
r.push((0x10000 + ((p - 0xD800) << 10) + (c - 0xDC00)).toString(16));
|
|
p = 0;
|
|
} else if (0xD800 <= c && c <= 0xDBFF) {
|
|
p = c;
|
|
} else {
|
|
r.push(c.toString(16));
|
|
}
|
|
}
|
|
return r.join(sep || '-');
|
|
}
|
|
|
|
}.toString()
|
|
// drop current indentation
|
|
.replace(/^ /gm, '')
|
|
// add the RegExp in the right place
|
|
.replace('re = /twemoji/', 're = /' + re + '/g')
|
|
.replace(/(\\u00[2-3][0-9])(\\u20e3)/g, '$1\\ufe0f?$2')
|
|
// add the full license
|
|
.replace('/*! (C) Twitter Inc. */',
|
|
'/*! (C) Twitter Inc. *//*\n' +
|
|
fs.readFileSync('LICENSE').toString().replace(
|
|
/^./gm, ' '
|
|
) +
|
|
'\n */'
|
|
) + '());');
|
|
}
|