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Editing: wp-emoji.js
/** * wp-emoji.js is used to replace emoji with images in browsers when the browser * doesn't support emoji natively. * * @output wp-includes/js/wp-emoji.js */ ( function( window, settings ) { /** * Replaces emoji with images when browsers don't support emoji. * * @since 4.2.0 * @access private * * @class * * @see Twitter Emoji library * @link https://github.com/twitter/twemoji * * @return {Object} The wpEmoji parse and test functions. */ function wpEmoji() { var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver, // Compression and maintain local scope. document = window.document, // Private. twemoji, timer, loaded = false, count = 0, ie11 = window.navigator.userAgent.indexOf( 'Trident/7.0' ) > 0; /** * Detect if the browser supports SVG. * * @since 4.6.0 * @private * * @see Modernizr * @link https://github.com/Modernizr/Modernizr/blob/master/feature-detects/svg/asimg.js * * @return {boolean} True if the browser supports svg, false if not. */ function browserSupportsSvgAsImage() { if ( !! document.implementation.hasFeature ) { return document.implementation.hasFeature( 'http://www.w3.org/TR/SVG11/feature#Image', '1.1' ); } // document.implementation.hasFeature is deprecated. It can be presumed // if future browsers remove it, the browser will support SVGs as images. return true; } /** * Runs when the document load event is fired, so we can do our first parse of * the page. * * Listens to all the DOM mutations and checks for added nodes that contain * emoji characters and replaces those with twitter emoji images. * * @since 4.2.0 * @private */ function load() { if ( loaded ) { return; } // Ensure twemoji is available on the global window before proceeding. if ( typeof window.twemoji === 'undefined' ) { // Break if waiting for longer than 30 seconds. if ( count > 600 ) { return; } // Still waiting. window.clearTimeout( timer ); timer = window.setTimeout( load, 50 ); count++; return; } twemoji = window.twemoji; loaded = true; // Initialize the mutation observer, which checks all added nodes for // replaceable emoji characters. if ( MutationObserver ) { new MutationObserver( function( mutationRecords ) { var i = mutationRecords.length, addedNodes, removedNodes, ii, node; while ( i-- ) { addedNodes = mutationRecords[ i ].addedNodes; removedNodes = mutationRecords[ i ].removedNodes; ii = addedNodes.length; /* * Checks if an image has been replaced by a text element * with the same text as the alternate description of the replaced image. * (presumably because the image could not be loaded). * If it is, do absolutely nothing. * * Node type 3 is a TEXT_NODE. * * @link https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType */ if ( ii === 1 && removedNodes.length === 1 && addedNodes[0].nodeType === 3 && removedNodes[0].nodeName === 'IMG' && addedNodes[0].data === removedNodes[0].alt && 'load-failed' === removedNodes[0].getAttribute( 'data-error' ) ) { return; } // Loop through all the added nodes. while ( ii-- ) { node = addedNodes[ ii ]; // Node type 3 is a TEXT_NODE. if ( node.nodeType === 3 ) { if ( ! node.parentNode ) { continue; } if ( ie11 ) { /* * IE 11's implementation of MutationObserver is buggy. * It unnecessarily splits text nodes when it encounters a HTML * template interpolation symbol ( "{{", for example ). So, we * join the text nodes back together as a work-around. * * Node type 3 is a TEXT_NODE. */ while( node.nextSibling && 3 === node.nextSibling.nodeType ) { node.nodeValue = node.nodeValue + node.nextSibling.nodeValue; node.parentNode.removeChild( node.nextSibling ); } } node = node.parentNode; } if ( test( node.textContent ) ) { parse( node ); } } } } ).observe( document.body, { childList: true, subtree: true } ); } parse( document.body ); } /** * Tests if a text string contains emoji characters. * * @since 4.3.0 * * @memberOf wp.emoji * * @param {string} text The string to test. * * @return {boolean} Whether the string contains emoji characters. */ function test( text ) { // Single char. U+20E3 to detect keycaps. U+00A9 "copyright sign" and U+00AE "registered sign" not included. var single = /[\u203C\u2049\u20E3\u2122\u2139\u2194-\u2199\u21A9\u21AA\u2300\u231A\u231B\u2328\u2388\u23CF\u23E9-\u23F3\u23F8-\u23FA\u24C2\u25AA\u25AB\u25B6\u25C0\u25FB-\u25FE\u2600-\u2604\u260E\u2611\u2614\u2615\u2618\u261D\u2620\u2622\u2623\u2626\u262A\u262E\u262F\u2638\u2639\u263A\u2648-\u2653\u2660\u2663\u2665\u2666\u2668\u267B\u267F\u2692\u2693\u2694\u2696\u2697\u2699\u269B\u269C\u26A0\u26A1\u26AA\u26AB\u26B0\u26B1\u26BD\u26BE\u26C4\u26C5\u26C8\u26CE\u26CF\u26D1\u26D3\u26D4\u26E9\u26EA\u26F0-\u26F5\u26F7-\u26FA\u26FD\u2702\u2705\u2708-\u270D\u270F\u2712\u2714\u2716\u271D\u2721\u2728\u2733\u2734\u2744\u2747\u274C\u274E\u2753\u2754\u2755\u2757\u2763\u2764\u2795\u2796\u2797\u27A1\u27B0\u27BF\u2934\u2935\u2B05\u2B06\u2B07\u2B1B\u2B1C\u2B50\u2B55\u3030\u303D\u3297\u3299]/, // Surrogate pair range. Only tests for the second half. pair = /[\uDC00-\uDFFF]/; if ( text ) { return pair.test( text ) || single.test( text ); } return false; } /** * Parses any emoji characters into Twemoji images. * * - When passed an element the emoji characters are replaced inline. * - When passed a string the emoji characters are replaced and the result is * returned. * * @since 4.2.0 * * @memberOf wp.emoji * * @param {HTMLElement|string} object The element or string to parse. * @param {Object} args Additional options for Twemoji. * * @return {HTMLElement|string} A string where all emoji are now image tags of * emoji. Or the element that was passed as the first argument. */ function parse( object, args ) { var params; /* * If the browser has full support, twemoji is not loaded or our * object is not what was expected, we do not parse anything. */ if ( settings.supports.everything || ! twemoji || ! object || ( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) { return object; } // Compose the params for the twitter emoji library. args = args || {}; params = { base: browserSupportsSvgAsImage() ? settings.svgUrl : settings.baseUrl, ext: browserSupportsSvgAsImage() ? settings.svgExt : settings.ext, className: args.className || 'emoji', callback: function( icon, options ) { // Ignore some standard characters that TinyMCE recommends in its character map. switch ( icon ) { case 'a9': case 'ae': case '2122': case '2194': case '2660': case '2663': case '2665': case '2666': return false; } if ( settings.supports.everythingExceptFlag && ! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) && // Country flags. ! /^(1f3f3-fe0f-200d-1f308|1f3f4-200d-2620-fe0f)$/.test( icon ) // Rainbow and pirate flags. ) { return false; } return ''.concat( options.base, icon, options.ext ); }, attributes: function() { return { role: 'img' }; }, onerror: function() { if ( twemoji.parentNode ) { this.setAttribute( 'data-error', 'load-failed' ); twemoji.parentNode.replaceChild( document.createTextNode( twemoji.alt ), twemoji ); } }, doNotParse: function( node ) { if ( node && node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) { // Do not parse this node. Emojis will not be replaced in this node and all sub-nodes. return true; } return false; } }; if ( typeof args.imgAttr === 'object' ) { params.attributes = function() { return args.imgAttr; }; } return twemoji.parse( object, params ); } load(); return { parse: parse, test: test }; } window.wp = window.wp || {}; /** * @namespace wp.emoji */ window.wp.emoji = new wpEmoji(); } )( window, window._wpemojiSettings );
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