/*jslint indent: 2, browser: true, bitwise: true, plusplus: true */ var twemoji = (function ( /*! Copyright Twitter Inc. and other contributors. Licensed under MIT *//* https://github.com/twitter/twemoji/blob/gh-pages/LICENSE */ // WARNING: this file is generated automatically via // `node scripts/build.js` // please update its `createTwemoji` function // at the bottom of the same file instead. ) { 'use strict'; /*jshint maxparams:4 */ var // the exported module object twemoji = { ///////////////////////// // properties // ///////////////////////// // default assets url, by default will be Twitter Inc. CDN base: 'https://twemoji.maxcdn.com/v/13.1.0/', // default assets file extensions, by default '.png' ext: '.png', // default assets/folder size, by default "72x72" // available via Twitter CDN: 72 size: '72x72', // default class name, by default 'emoji' className: 'emoji', // basic utilities / helpers to convert code points // to JavaScript surrogates and vice versa convert: { /** * Given an HEX codepoint, returns UTF16 surrogate pairs. * * @param string generic codepoint, i.e. '1F4A9' * @return string codepoint transformed into utf16 surrogates pair, * i.e. \uD83D\uDCA9 * * @example * twemoji.convert.fromCodePoint('1f1e8'); * // "\ud83c\udde8" * * '1f1e8-1f1f3'.split('-').map(twemoji.convert.fromCodePoint).join('') * // "\ud83c\udde8\ud83c\uddf3" */ fromCodePoint: fromCodePoint, /** * Given UTF16 surrogate pairs, returns the equivalent HEX codepoint. * * @param string generic utf16 surrogates pair, i.e. \uD83D\uDCA9 * @param string optional separator for double code points, default='-' * @return string utf16 transformed into codepoint, i.e. '1F4A9' * * @example * twemoji.convert.toCodePoint('\ud83c\udde8\ud83c\uddf3'); * // "1f1e8-1f1f3" * * twemoji.convert.toCodePoint('\ud83c\udde8\ud83c\uddf3', '~'); * // "1f1e8~1f1f3" */ toCodePoint: toCodePoint }, ///////////////////////// // methods // ///////////////////////// /** * User first: used to remove missing images * preserving the original text intent when * a fallback for network problems is desired. * Automatically added to Image nodes via DOM * It could be recycled for string operations via: * $('img.emoji').on('error', twemoji.onerror) */ onerror: function onerror() { if (this.parentNode) { this.parentNode.replaceChild(createText(this.alt, false), this); } }, /** * Main method/logic to generate either <img> tags or HTMLImage nodes. * "emojify" a generic text or DOM Element. * * @overloads * * String replacement for `innerHTML` or server side operations * twemoji.parse(string); * twemoji.parse(string, Function); * twemoji.parse(string, Object); * * HTMLElement tree parsing for safer operations over existing DOM * twemoji.parse(HTMLElement); * twemoji.parse(HTMLElement, Function); * twemoji.parse(HTMLElement, Object); * * @param string|HTMLElement the source to parse and enrich with emoji. * * string replace emoji matches with <img> tags. * Mainly used to inject emoji via `innerHTML` * It does **not** parse the string or validate it, * it simply replaces found emoji with a tag. * NOTE: be sure this won't affect security. * * HTMLElement walk through the DOM tree and find emoji * that are inside **text node only** (nodeType === 3) * Mainly used to put emoji in already generated DOM * without compromising surrounding nodes and * **avoiding** the usage of `innerHTML`. * NOTE: Using DOM elements instead of strings should * improve security without compromising too much * performance compared with a less safe `innerHTML`. * * @param Function|Object [optional] * either the callback that will be invoked or an object * with all properties to use per each found emoji. * * Function if specified, this will be invoked per each emoji * that has been found through the RegExp except * those follwed by the invariant \uFE0E ("as text"). * Once invoked, parameters will be: * * iconId:string the lower case HEX code point * i.e. "1f4a9" * * options:Object all info for this parsing operation * * variant:char the optional \uFE0F ("as image") * variant, in case this info * is anyhow meaningful. * By default this is ignored. * * If such callback will return a falsy value instead * of a valid `src` to use for the image, nothing will * actually change for that specific emoji. * * * Object if specified, an object containing the following properties * * 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 * * @example * * twemoji.parse("I \u2764\uFE0F emoji!"); * // I <img class="emoji" draggable="false" alt="❤️" src="/assets/2764.gif"/> emoji! * * * twemoji.parse("I \u2764\uFE0F emoji!", function(iconId, options) { * return '/assets/' + iconId + '.gif'; * }); * // I <img class="emoji" draggable="false" alt="❤️" src="/assets/2764.gif"/> emoji! * * * twemoji.parse("I \u2764\uFE0F emoji!", { * size: 72, * callback: function(iconId, options) { * return '/assets/' + options.size + '/' + iconId + options.ext; * } * }); * // I <img class="emoji" draggable="false" alt="❤️" src="/assets/72x72/2764.png"/> emoji! * */ parse: parse, /** * Given a string, invokes the callback argument * per each emoji found in such string. * This is the most raw version used by * the .parse(string) method itself. * * @param string generic string to parse * @param Function a generic callback that will be * invoked to replace the content. * This callback will receive standard * String.prototype.replace(str, callback) * arguments such: * callback( * rawText, // the emoji match * ); * * and others commonly received via replace. */ replace: replace, /** * Simplify string tests against emoji. * * @param string some text that might contain emoji * @return boolean true if any emoji was found, false otherwise. * * @example * * if (twemoji.test(someContent)) { * console.log("emoji All The Things!"); * } */ test: test }, // used to escape HTML special chars in attributes escaper = { '&': '&', '<': '<', '>': '>', "'": ''', '"': '"' }, // RegExp based on emoji's official Unicode standards // http://www.unicode.org/Public/UNIDATA/EmojiSources.txt re = 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// avoid runtime RegExp creation for not so smart, // not JIT based, and old browsers / engines UFE0Fg = /\uFE0F/g, // avoid using a string literal like '\u200D' here because minifiers expand it inline U200D = String.fromCharCode(0x200D), // used to find HTML special chars in attributes rescaper = /[&<>'"]/g, // nodes with type 1 which should **not** be parsed shouldntBeParsed = /^(?:iframe|noframes|noscript|script|select|style|textarea)$/, // just a private shortcut fromCharCode = String.fromCharCode; return twemoji; ///////////////////////// // private functions // // declaration // ///////////////////////// /** * 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, clean) { return document.createTextNode(clean ? text.replace(UFE0Fg, '') : text); } /** * Utility function to escape html attribute text * @param string text use in HTML attribute * @return string text encoded to use in HTML attribute */ function escapeHTML(s) { return s.replace(rescaper, replacer); } /** * 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" * @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, that are svg, or that // should not be parsed as script, style, and others else if (nodeType === 1 && !('ownerSVGElement' in subnode) && !shouldntBeParsed.test(subnode.nodeName.toLowerCase())) { grabAllTextNodes(subnode, allText); } } return allText; } /** * Used to both remove the possible variant * and to convert utf16 into code points. * If there is a zero-width-joiner (U+200D), leave the variants in. * @param string the raw text of the emoji match * @return string the code point */ function grabTheRightIcon(rawText) { // if variant is present as \uFE0F return toCodePoint(rawText.indexOf(U200D) < 0 ? rawText.replace(UFE0Fg, '') : rawText ); } /** * 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, attrib, attrname, modified, fragment, subnode, text, match, i, index, img, rawText, iconId, 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), true) ); } rawText = match[0]; iconId = grabTheRightIcon(rawText); i = index + rawText.length; src = options.callback(iconId, options); if (iconId && src) { img = new Image(); img.onerror = options.onerror; img.setAttribute('draggable', 'false'); attrib = options.attributes(rawText, iconId); for (attrname in attrib) { if ( attrib.hasOwnProperty(attrname) && // don't allow any handlers to be set + don't allow overrides attrname.indexOf('on') !== 0 && !img.hasAttribute(attrname) ) { img.setAttribute(attrname, attrib[attrname]); } } img.className = options.className; img.alt = rawText; img.src = src; modified = true; fragment.appendChild(img); } if (!img) fragment.appendChild(createText(rawText, false)); 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), true) ); } // 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 (rawText) { var ret = rawText, iconId = grabTheRightIcon(rawText), src = options.callback(iconId, options), attrib, attrname; if (iconId && src) { // recycle the match string replacing the emoji // with its image counter part ret = '<img '.concat( 'class="', options.className, '" ', 'draggable="false" ', // needs to preserve user original intent // when variants should be copied and pasted too 'alt="', rawText, '"', ' src="', src, '"' ); attrib = options.attributes(rawText, iconId); for (attrname in attrib) { if ( attrib.hasOwnProperty(attrname) && // don't allow any handlers to be set + don't allow overrides attrname.indexOf('on') !== 0 && ret.indexOf(' ' + attrname + '=') === -1 ) { ret = ret.concat(' ', attrname, '="', escapeHTML(attrib[attrname]), '"'); } } ret = ret.concat('/>'); } return ret; }); } /** * Function used to actually replace HTML special chars * @param string HTML special char * @return string encoded HTML special char */ function replacer(m) { return escaper[m]; } /** * Default options.attribute callback * @return null */ function returnNull() { return null; } /** * 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, 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 || '-'); } }());