mirror of
https://github.com/twitter/twemoji.git
synced 2024-12-27 03:16:23 +00:00
611 lines
22 KiB
JavaScript
Executable File
611 lines
22 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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var path = require('path');
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var Utils = require('./utils');
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var regex = require('twemoji-parser/dist/lib/regex').default;
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var { version } = require('../package.json');
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function file(which) {
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return path.join(__dirname, '..', which);
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}
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function createTwemoji() {
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fs.mkdirSync('dist/',{ recursive: true })
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fs.writeFileSync(
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file('dist/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 scripts/build.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: 'https://twemoji.maxcdn.com/v/$VERSION/',
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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 "72x72"
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// available via Twitter CDN: 72
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size: '72x72',
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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, false), 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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* iconId: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(iconId, options) {
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* return '/assets/' + iconId + '.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(iconId, options) {
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* return '/assets/' + options.size + '/' + iconId + 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 callback will 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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* rawText, // the emoji match
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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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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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// used to escape HTML special chars in attributes
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escaper = {
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'&': '&',
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'<': '<',
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'>': '>',
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"'": ''',
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'"': '"'
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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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// avoid runtime RegExp creation for not so smart,
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// not JIT based, and old browsers / engines
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UFE0Fg = /\uFE0F/g,
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// avoid using a string literal like '\u200D' here because minifiers expand it inline
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U200D = String.fromCharCode(0x200D),
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// used to find HTML special chars in attributes
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rescaper = /[&<>'"]/g,
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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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// 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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/**
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* Shortcut to create text nodes
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* @param string text used to create DOM text node
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* @return Node a DOM node with that text
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*/
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function createText(text, clean) {
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return document.createTextNode(clean ? text.replace(UFE0Fg, '') : text);
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}
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/**
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* Utility function to escape html attribute text
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* @param string text use in HTML attribute
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* @return string text encoded to use in HTML attribute
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*/
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function escapeHTML(s) {
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return s.replace(rescaper, replacer);
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}
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/**
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* Default callback used to generate emoji src
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* based on Twitter CDN
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* @param string the emoji codepoint string
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* @param string the default size to use, i.e. "36x36"
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* @return string the image source to use
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*/
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function defaultImageSrcGenerator(icon, options) {
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return ''.concat(options.base, options.size, '/', icon, options.ext);
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}
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/**
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* Given a generic DOM nodeType 1, walk through all children
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* and store every nodeType 3 (#text) found in the tree.
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* @param Element a DOM Element with probably some text in it
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* @param Array the list of previously discovered text nodes
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* @return Array same list with new discovered nodes, if any
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*/
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function grabAllTextNodes(node, allText) {
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var
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childNodes = node.childNodes,
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length = childNodes.length,
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subnode,
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nodeType;
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while (length--) {
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subnode = childNodes[length];
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nodeType = subnode.nodeType;
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// parse emoji only in text nodes
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if (nodeType === 3) {
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// collect them to process emoji later
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allText.push(subnode);
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}
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// ignore all nodes that are not type 1, that are svg, or that
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// should not be parsed as script, style, and others
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else if (nodeType === 1 && !('ownerSVGElement' in subnode) &&
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!shouldntBeParsed.test(subnode.nodeName.toLowerCase())) {
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grabAllTextNodes(subnode, allText);
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}
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}
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return allText;
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}
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/**
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* Used to both remove the possible variant
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* and to convert utf16 into code points.
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* If there is a zero-width-joiner (U+200D), leave the variants in.
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* @param string the raw text of the emoji match
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* @return string the code point
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*/
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function grabTheRightIcon(rawText) {
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// if variant is present as \uFE0F
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return toCodePoint(rawText.indexOf(U200D) < 0 ?
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rawText.replace(UFE0Fg, '') :
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rawText
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);
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}
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/**
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* DOM version of the same logic / parser:
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* emojify all found sub-text nodes placing images node instead.
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* @param Element generic DOM node with some text in some child node
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* @param Object options containing info about how to parse
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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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* @return Element same generic node with emoji in place, if any.
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*/
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function parseNode(node, options) {
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var
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allText = grabAllTextNodes(node, []),
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length = allText.length,
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attrib,
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attrname,
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modified,
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fragment,
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subnode,
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text,
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match,
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i,
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index,
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img,
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rawText,
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iconId,
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src;
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while (length--) {
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modified = false;
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fragment = document.createDocumentFragment();
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subnode = allText[length];
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text = subnode.nodeValue;
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i = 0;
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while ((match = re.exec(text))) {
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index = match.index;
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if (index !== i) {
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fragment.appendChild(
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createText(text.slice(i, index), true)
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);
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}
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rawText = match[0];
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iconId = grabTheRightIcon(rawText);
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i = index + rawText.length;
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src = options.callback(iconId, options);
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if (iconId && src) {
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img = new Image();
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img.onerror = options.onerror;
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img.setAttribute('draggable', 'false');
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attrib = options.attributes(rawText, iconId);
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for (attrname in attrib) {
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if (
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attrib.hasOwnProperty(attrname) &&
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// don't allow any handlers to be set + don't allow overrides
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attrname.indexOf('on') !== 0 &&
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!img.hasAttribute(attrname)
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) {
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img.setAttribute(attrname, attrib[attrname]);
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}
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}
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img.className = options.className;
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img.alt = rawText;
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img.src = src;
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modified = true;
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fragment.appendChild(img);
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}
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if (!img) fragment.appendChild(createText(rawText, false));
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img = null;
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}
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// is there actually anything to replace in here ?
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if (modified) {
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// any text left to be added ?
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if (i < text.length) {
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fragment.appendChild(
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createText(text.slice(i), true)
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);
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}
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// replace the text node only, leave intact
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// anything else surrounding such text
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subnode.parentNode.replaceChild(fragment, subnode);
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}
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}
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return node;
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}
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/**
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* String/HTML version of the same logic / parser:
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* emojify a generic text placing images tags instead of surrogates pair.
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* @param string generic string with possibly some emoji in it
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* @param Object options containing info about how to parse
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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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* @return the string with <img tags> replacing all found and parsed emoji
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*/
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function parseString(str, options) {
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return replace(str, function (rawText) {
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var
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ret = rawText,
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iconId = grabTheRightIcon(rawText),
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src = options.callback(iconId, options),
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attrib,
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attrname;
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if (iconId && src) {
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// recycle the match string replacing the emoji
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// with its image counter part
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ret = '<img '.concat(
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'class="', options.className, '" ',
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'draggable="false" ',
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// needs to preserve user original intent
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// when variants should be copied and pasted too
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'alt="',
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rawText,
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'"',
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' src="',
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src,
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'"'
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);
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attrib = options.attributes(rawText, iconId);
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for (attrname in attrib) {
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if (
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attrib.hasOwnProperty(attrname) &&
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// don't allow any handlers to be set + don't allow overrides
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attrname.indexOf('on') !== 0 &&
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ret.indexOf(' ' + attrname + '=') === -1
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) {
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ret = ret.concat(' ', attrname, '="', escapeHTML(attrib[attrname]), '"');
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}
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}
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ret = ret.concat('/>');
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}
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return ret;
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});
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}
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/**
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* Function used to actually replace HTML special chars
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* @param string HTML special char
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* @return string encoded HTML special char
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*/
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function replacer(m) {
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return escaper[m];
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}
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/**
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* Default options.attribute callback
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* @return null
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*/
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function returnNull() {
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return null;
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}
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/**
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* Given a generic value, creates its squared counterpart if it's a number.
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* As example, number 36 will return '36x36'.
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* @param any a generic value.
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* @return any a string representing asset size, i.e. "36x36"
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* only in case the value was a number.
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* Returns initial value otherwise.
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*/
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function toSizeSquaredAsset(value) {
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return typeof value === 'number' ?
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value + 'x' + value :
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value;
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}
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/////////////////////////
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// exported functions //
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// declaration //
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/////////////////////////
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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 fromCharCode(code);
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}
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code -= 0x10000;
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return fromCharCode(
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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,
|
|
attributes: typeof how.attributes === 'function' ? how.attributes : returnNull,
|
|
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,
|
|
onerror: how.onerror || twemoji.onerror
|
|
});
|
|
}
|
|
|
|
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 = ${regex.toString()}`)
|
|
.replace('$VERSION', version)
|
|
// add the full license
|
|
.replace('/*! (C) Twitter Inc. */',
|
|
'/*! (C) Twitter Inc. *//*\n' +
|
|
fs.readFileSync(file('LICENSE')).toString().replace(
|
|
/^./gm, ' '
|
|
) +
|
|
'\n */'
|
|
) + '());');
|
|
|
|
}
|
|
|
|
createTwemoji();
|
|
require('./create-dist');
|
|
require('./preview');
|