/**

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* wp-emoji.js is used to replace emoji with images in browsers when the browser

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* doesn't support emoji natively.

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*

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* @output wp-includes/js/wp-emoji.js

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*/

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( function( window, settings ) {

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/**

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* Replaces emoji with images when browsers don't support emoji.

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*

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* @since 4.2.0

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* @access private

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*

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* @class

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*

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* @see Twitter Emoji library

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* @link https://github.com/twitter/twemoji

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*

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* @return {Object} The wpEmoji parse and test functions.

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*/

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function wpEmoji() {

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var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver,

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// Compression and maintain local scope.

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document = window.document,

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// Private.

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twemoji, timer,

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loaded = false,

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count = 0,

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ie11 = window.navigator.userAgent.indexOf( 'Trident/7.0' ) > 0;

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/**

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* Detect if the browser supports SVG.

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*

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* @since 4.6.0

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* @private

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*

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* @see Modernizr

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* @link https://github.com/Modernizr/Modernizr/blob/master/feature-detects/svg/asimg.js

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*

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* @return {boolean} True if the browser supports svg, false if not.

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*/

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function browserSupportsSvgAsImage() {

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if ( !! document.implementation.hasFeature ) {

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return document.implementation.hasFeature( 'http://www.w3.org/TR/SVG11/feature#Image', '1.1' );

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}

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// document.implementation.hasFeature is deprecated. It can be presumed

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// if future browsers remove it, the browser will support SVGs as images.

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return true;

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}

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/**

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* Runs when the document load event is fired, so we can do our first parse of

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* the page.

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*

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* Listens to all the DOM mutations and checks for added nodes that contain

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* emoji characters and replaces those with twitter emoji images.

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*

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* @since 4.2.0

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* @private

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*/

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function load() {

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if ( loaded ) {

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return;

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}

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// Ensure twemoji is available on the global window before proceeding.

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if ( typeof window.twemoji === 'undefined' ) {

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// Break if waiting for longer than 30 seconds.

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if ( count > 600 ) {

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return;

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}

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// Still waiting.

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window.clearTimeout( timer );

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timer = window.setTimeout( load, 50 );

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count++;

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return;

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}

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twemoji = window.twemoji;

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loaded = true;

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// Initialize the mutation observer, which checks all added nodes for

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// replaceable emoji characters.

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if ( MutationObserver ) {

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new MutationObserver( function( mutationRecords ) {

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var i = mutationRecords.length,

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addedNodes, removedNodes, ii, node;

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while ( i-- ) {

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addedNodes = mutationRecords[ i ].addedNodes;

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removedNodes = mutationRecords[ i ].removedNodes;

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ii = addedNodes.length;

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/*

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* Checks if an image has been replaced by a text element

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* with the same text as the alternate description of the replaced image.

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* (presumably because the image could not be loaded).

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* If it is, do absolutely nothing.

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*

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* Node type 3 is a TEXT_NODE.

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*

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* @link https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType

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*/

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if (

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ii === 1 && removedNodes.length === 1 &&

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addedNodes[0].nodeType === 3 &&

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removedNodes[0].nodeName === 'IMG' &&

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addedNodes[0].data === removedNodes[0].alt &&

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'load-failed' === removedNodes[0].getAttribute( 'data-error' )

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) {

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return;

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}

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// Loop through all the added nodes.

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while ( ii-- ) {

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node = addedNodes[ ii ];

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// Node type 3 is a TEXT_NODE.

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if ( node.nodeType === 3 ) {

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if ( ! node.parentNode ) {

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continue;

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}

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if ( ie11 ) {

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/*

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* IE 11's implementation of MutationObserver is buggy.

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* It unnecessarily splits text nodes when it encounters a HTML

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* template interpolation symbol ( "{{", for example ). So, we

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* join the text nodes back together as a work-around.

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*

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* Node type 3 is a TEXT_NODE.

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*/

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while( node.nextSibling && 3 === node.nextSibling.nodeType ) {

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node.nodeValue = node.nodeValue + node.nextSibling.nodeValue;

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node.parentNode.removeChild( node.nextSibling );

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}

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}

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node = node.parentNode;

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}

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/*

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* If the class name of a non-element node contains 'wp-exclude-emoji' ignore it.

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*

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* Node type 1 is an ELEMENT_NODE.

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*/

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if ( ! node || node.nodeType !== 1 ||

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( node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {

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continue;

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}

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if ( test( node.textContent ) ) {

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parse( node );

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}

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}

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}

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} ).observe( document.body, {

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childList: true,

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subtree: true

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} );

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}

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parse( document.body );

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}

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/**

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* Tests if a text string contains emoji characters.

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*

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* @since 4.3.0

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*

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* @memberOf wp.emoji

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*

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* @param {string} text The string to test.

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*

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* @return {boolean} Whether the string contains emoji characters.

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*/

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function test( text ) {

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// Single char. U+20E3 to detect keycaps. U+00A9 "copyright sign" and U+00AE "registered sign" not included.

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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]/,

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// Surrogate pair range. Only tests for the second half.

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pair = /[\uDC00-\uDFFF]/;

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if ( text ) {

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return pair.test( text ) || single.test( text );

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}

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return false;

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}

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/**

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* Parses any emoji characters into Twemoji images.

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*

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* - When passed an element the emoji characters are replaced inline.

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* - When passed a string the emoji characters are replaced and the result is

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* returned.

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*

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* @since 4.2.0

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*

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* @memberOf wp.emoji

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*

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* @param {HTMLElement|string} object The element or string to parse.

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* @param {Object} args Additional options for Twemoji.

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*

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* @return {HTMLElement|string} A string where all emoji are now image tags of

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* emoji. Or the element that was passed as the first argument.

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*/

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function parse( object, args ) {

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var params;

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/*

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* If the browser has full support, twemoji is not loaded or our

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* object is not what was expected, we do not parse anything.

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*/

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if ( settings.supports.everything || ! twemoji || ! object ||

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( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) {

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return object;

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}

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// Compose the params for the twitter emoji library.

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args = args || {};

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params = {

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base: browserSupportsSvgAsImage() ? settings.svgUrl : settings.baseUrl,

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ext: browserSupportsSvgAsImage() ? settings.svgExt : settings.ext,

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className: args.className || 'emoji',

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callback: function( icon, options ) {

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// Ignore some standard characters that TinyMCE recommends in its character map.

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switch ( icon ) {

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case 'a9':

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case 'ae':

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case '2122':

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case '2194':

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case '2660':

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case '2663':

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case '2665':

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case '2666':

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return false;

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}

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if ( settings.supports.everythingExceptFlag &&

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! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) && // Country flags.

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! /^(1f3f3-fe0f-200d-1f308|1f3f4-200d-2620-fe0f)$/.test( icon ) // Rainbow and pirate flags.

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) {

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return false;

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}

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return ''.concat( options.base, icon, options.ext );

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},

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attributes: function() {

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return {

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role: 'img'

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};

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},

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onerror: function() {

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if ( twemoji.parentNode ) {

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this.setAttribute( 'data-error', 'load-failed' );

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twemoji.parentNode.replaceChild( document.createTextNode( twemoji.alt ), twemoji );

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}

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}

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};

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if ( typeof args.imgAttr === 'object' ) {

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params.attributes = function() {

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return args.imgAttr;

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};

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}

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return twemoji.parse( object, params );

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}

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/**

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* Initialize our emoji support, and set up listeners.

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*/

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if ( settings ) {

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if ( settings.DOMReady ) {

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load();

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} else {

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settings.readyCallback = load;

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}

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}

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return {

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parse: parse,

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test: test

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};

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}

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window.wp = window.wp || {};

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/**

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* @namespace wp.emoji

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*/

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window.wp.emoji = new wpEmoji();

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} )( window, window._wpemojiSettings );

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