X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/7f1521bf193b382565eb753043c161f4cb3fcda7..refs/tags/wordpress-4.3:/wp-includes/js/wp-emoji.js

diff --git a/wp-includes/js/wp-emoji.js b/wp-includes/js/wp-emoji.js
index 0ff3c6f6..4acf4342 100644
--- a/wp-includes/js/wp-emoji.js
+++ b/wp-includes/js/wp-emoji.js
@@ -3,24 +3,6 @@
 	function wpEmoji() {
 		var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver,
 
-		/**
-		 * Flag to determine if the browser and the OS support emoji.
-		 *
-		 * @since 4.2.0
-		 *
-		 * @var Boolean
-		 */
-		supportsEmoji = false,
-
-		/**
-		 * Flag to determine if the browser and the OS support flag (two character) emoji.
-		 *
-		 * @since 4.2.0
-		 *
-		 * @var Boolean
-		 */
-		supportsFlagEmoji = false,
-
 		/**
 		 * Flag to determine if we should replace emoji characters with images.
 		 *
@@ -30,10 +12,9 @@
 		 */
 		replaceEmoji = false,
 
-		isIE8 = window.navigator.userAgent.indexOf( 'IE 8' ) !== -1,
-
 		// Private
 		twemoji, timer,
+		loaded = false,
 		count = 0;
 
 		/**
@@ -42,6 +23,10 @@
 		 * @since 4.2.0
 		 */
 		function load() {
+			if ( loaded ) {
+				return;
+			}
+
 			if ( typeof window.twemoji === 'undefined' ) {
 				// Break if waiting for longer than 30 sec.
 				if ( count > 600 ) {
@@ -57,23 +42,41 @@
 			}
 
 			twemoji = window.twemoji;
+			loaded = true;
 
 			if ( MutationObserver ) {
 				new MutationObserver( function( mutationRecords ) {
 					var i = mutationRecords.length,
-						ii, node;
+						addedNodes, removedNodes, ii, node;
 
 					while ( i-- ) {
-						ii = mutationRecords[ i ].addedNodes.length;
+						addedNodes = mutationRecords[ i ].addedNodes;
+						removedNodes = mutationRecords[ i ].removedNodes;
+						ii = addedNodes.length;
+
+						if (
+							ii === 1 && removedNodes.length === 1 &&
+							addedNodes[0].nodeType === 3 &&
+							removedNodes[0].nodeName === 'IMG' &&
+							addedNodes[0].data === removedNodes[0].alt
+						) {
+							return;
+						}
 
 						while ( ii-- ) {
-							node = mutationRecords[ i ].addedNodes[ ii ];
+							node = addedNodes[ ii ];
 
 							if ( node.nodeType === 3 ) {
 								node = node.parentNode;
 							}
 
-							if ( node && node.nodeType === 1 ) {
+							if ( ! node || node.nodeType !== 1 ||
+								( node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {
+
+								continue;
+							}
+
+							if ( test( node.textContent ) ) {
 								parse( node );
 							}
 						}
@@ -87,6 +90,28 @@
 			parse( document.body );
 		}
 
+		/**
+		 * Test if a text string contains emoji characters.
+		 *
+		 * @since 4.3.0
+		 *
+		 * @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;
+		}
+
 		/**
 		 * Given an element or string, parse any emoji characters into Twemoji images.
 		 *
@@ -96,17 +121,19 @@
 		 * @param {Object} args Additional options for Twemoji.
 		 */
 		function parse( object, args ) {
-			if ( ! replaceEmoji ) {
+			var params;
+
+			if ( ! replaceEmoji || ! twemoji || ! object ||
+				( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) {
+
 				return object;
 			}
 
 			args = args || {};
-
-			return twemoji.parse( object, {
+			params = {
 				base: settings.baseUrl,
 				ext: settings.ext,
 				className: args.className || 'emoji',
-				imgAttr: args.imgAttr,
 				callback: function( icon, options ) {
 					// Ignore some standard characters that TinyMCE recommends in its character map.
 					switch ( icon ) {
@@ -121,7 +148,7 @@
 							return false;
 					}
 
-					if ( ! supportsFlagEmoji && supportsEmoji &&
+					if ( ! settings.supports.flag && settings.supports.simple &&
 						! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) ) {
 
 						return false;
@@ -129,38 +156,34 @@
 
 					return ''.concat( options.base, icon, options.ext );
 				}
-			} );
-		}
+			};
 
-		// Load when the readyState changes to 'interactive', not 'complete'.
-		function onLoad() {
-			if ( ( ! isIE8 && 'interactive' === document.readyState ) || ( isIE8 && 'complete' === document.readyState ) ) {
-				load();
+			if ( typeof args.imgAttr === 'object' ) {
+				params.attributes = function() {
+					return args.imgAttr;
+				};
 			}
+
+			return twemoji.parse( object, params );
 		}
 
 		/**
 		 * Initialize our emoji support, and set up listeners.
 		 */
 		if ( settings ) {
-			supportsEmoji = window._wpemojiSettings.supports.simple;
-			supportsFlagEmoji = window._wpemojiSettings.supports.flag;
-			replaceEmoji = ! supportsEmoji || ! supportsFlagEmoji;
-
-			if ( ( ! isIE8 && 'loading' === document.readyState ) || ( isIE8 && 'complete' !== document.readyState ) ) {
-				if ( document.addEventListener ) {
-					document.addEventListener( 'readystatechange', onLoad, false );
-				} else if ( document.attachEvent ) {
-					document.attachEvent( 'onreadystatechange', onLoad );
-				}
-			} else {
+			replaceEmoji = ! settings.supports.simple || ! settings.supports.flag;
+
+			if ( settings.DOMReady ) {
 				load();
+			} else {
+				settings.readyCallback = load;
 			}
 		}
 
 		return {
 			replaceEmoji: replaceEmoji,
-			parse: parse
+			parse: parse,
+			test: test
 		};
 	}