wp-includes/js/wp-emoji.js

   1
   2 ( function( window, settings ) {
   3         function wpEmoji() {
   4                 var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver,
   5
   6                 /**
   7                  * Flag to determine if we should replace emoji characters with images.
   8                  *
   9                  * @since 4.2.0
  10                  *
  11                  * @var Boolean
  12                  */
  13                 replaceEmoji = false,
  14
  15                 // Private
  16                 twemoji, timer,
  17                 loaded = false,
  18                 count = 0;
  19
  20                 /**
  21                  * Runs when the document load event is fired, so we can do our first parse of the page.
  22                  *
  23                  * @since 4.2.0
  24                  */
  25                 function load() {
  26                         if ( loaded ) {
  27                                 return;
  28                         }
  29
  30                         if ( typeof window.twemoji === 'undefined' ) {
  31                                 // Break if waiting for longer than 30 sec.
  32                                 if ( count > 600 ) {
  33                                         return;
  34                                 }
  35
  36                                 // Still waiting.
  37                                 window.clearTimeout( timer );
  38                                 timer = window.setTimeout( load, 50 );
  39                                 count++;
  40
  41                                 return;
  42                         }
  43
  44                         twemoji = window.twemoji;
  45                         loaded = true;
  46
  47                         if ( MutationObserver ) {
  48                                 new MutationObserver( function( mutationRecords ) {
  49                                         var i = mutationRecords.length,
  50                                                 addedNodes, removedNodes, ii, node;
  51
  52                                         while ( i-- ) {
  53                                                 addedNodes = mutationRecords[ i ].addedNodes;
  54                                                 removedNodes = mutationRecords[ i ].removedNodes;
  55                                                 ii = addedNodes.length;
  56
  57                                                 if (
  58                                                         ii === 1 && removedNodes.length === 1 &&
  59                                                         addedNodes[0].nodeType === 3 &&
  60                                                         removedNodes[0].nodeName === 'IMG' &&
  61                                                         addedNodes[0].data === removedNodes[0].alt &&
  62                                                         'load-failed' === removedNodes[0].getAttribute( 'data-error' )
  63                                                 ) {
  64                                                         return;
  65                                                 }
  66
  67                                                 while ( ii-- ) {
  68                                                         node = addedNodes[ ii ];
  69
  70                                                         if ( node.nodeType === 3 ) {
  71                                                                 node = node.parentNode;
  72                                                         }
  73
  74                                                         if ( ! node || node.nodeType !== 1 ||
  75                                                                 ( node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {
  76
  77                                                                 continue;
  78                                                         }
  79
  80                                                         if ( test( node.textContent ) ) {
  81                                                                 parse( node );
  82                                                         }
  83                                                 }
  84                                         }
  85                                 } ).observe( document.body, {
  86                                         childList: true,
  87                                         subtree: true
  88                                 } );
  89                         }
  90
  91                         parse( document.body );
  92                 }
  93
  94                 /**
  95                  * Test if a text string contains emoji characters.
  96                  *
  97                  * @since 4.3.0
  98                  *
  99                  * @param {String} text The string to test
 100                  *
 101                  * @return {Boolean} Whether the string contains emoji characters.
 102                  */
 103                 function test( text ) {
 104                         // Single char. U+20E3 to detect keycaps. U+00A9 "copyright sign" and U+00AE "registered sign" not included.
 105                         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]/,
 106                         // Surrogate pair range. Only tests for the second half.
 107                         pair = /[\uDC00-\uDFFF]/;
 108
 109                         if ( text ) {
 110                                 return  pair.test( text ) || single.test( text );
 111                         }
 112
 113                         return false;
 114                 }
 115
 116                 /**
 117                  * Given an element or string, parse any emoji characters into Twemoji images.
 118                  *
 119                  * @since 4.2.0
 120                  *
 121                  * @param {HTMLElement|String} object The element or string to parse.
 122                  * @param {Object} args Additional options for Twemoji.
 123                  */
 124                 function parse( object, args ) {
 125                         var params;
 126
 127                         if ( ! replaceEmoji || ! twemoji || ! object ||
 128                                 ( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) {
 129
 130                                 return object;
 131                         }
 132
 133                         args = args || {};
 134                         params = {
 135                                 base: settings.baseUrl,
 136                                 ext: settings.ext,
 137                                 className: args.className || 'emoji',
 138                                 callback: function( icon, options ) {
 139                                         // Ignore some standard characters that TinyMCE recommends in its character map.
 140                                         switch ( icon ) {
 141                                                 case 'a9':
 142                                                 case 'ae':
 143                                                 case '2122':
 144                                                 case '2194':
 145                                                 case '2660':
 146                                                 case '2663':
 147                                                 case '2665':
 148                                                 case '2666':
 149                                                         return false;
 150                                         }
 151
 152                                         if ( ! settings.supports.flag && settings.supports.simple && settings.supports.unicode8 &&
 153                                                 ! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) ) {
 154
 155                                                 return false;
 156                                         }
 157
 158                                         return ''.concat( options.base, icon, options.ext );
 159                                 },
 160                                 onerror: function() {
 161                                         if ( twemoji.parentNode ) {
 162                                                 this.setAttribute( 'data-error', 'load-failed' );
 163                                                 twemoji.parentNode.replaceChild( document.createTextNode( twemoji.alt ), twemoji );
 164                                         }
 165                                 }
 166                         };
 167
 168                         if ( typeof args.imgAttr === 'object' ) {
 169                                 params.attributes = function() {
 170                                         return args.imgAttr;
 171                                 };
 172                         }
 173
 174                         return twemoji.parse( object, params );
 175                 }
 176
 177                 /**
 178                  * Initialize our emoji support, and set up listeners.
 179                  */
 180                 if ( settings ) {
 181                         replaceEmoji = ! settings.supports.simple || ! settings.supports.flag || ! settings.supports.unicode8;
 182
 183                         if ( settings.DOMReady ) {
 184                                 load();
 185                         } else {
 186                                 settings.readyCallback = load;
 187                         }
 188                 }
 189
 190                 return {
 191                         replaceEmoji: replaceEmoji,
 192                         parse: parse,
 193                         test: test
 194                 };
 195         }
 196
 197         window.wp = window.wp || {};
 198         window.wp.emoji = new wpEmoji();
 199
 200 } )( window, window._wpemojiSettings );