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                                                 ) {
  63                                                         return;
  64                                                 }
  65
  66                                                 while ( ii-- ) {
  67                                                         node = addedNodes[ ii ];
  68
  69                                                         if ( node.nodeType === 3 ) {
  70                                                                 node = node.parentNode;
  71                                                         }
  72
  73                                                         if ( ! node || node.nodeType !== 1 ||
  74                                                                 ( node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {
  75
  76                                                                 continue;
  77                                                         }
  78
  79                                                         if ( test( node.textContent ) ) {
  80                                                                 parse( node );
  81                                                         }
  82                                                 }
  83                                         }
  84                                 } ).observe( document.body, {
  85                                         childList: true,
  86                                         subtree: true
  87                                 } );
  88                         }
  89
  90                         parse( document.body );
  91                 }
  92
  93                 /**
  94                  * Test if a text string contains emoji characters.
  95                  *
  96                  * @since 4.3.0
  97                  *
  98                  * @param {String} text The string to test
  99                  *
 100                  * @return {Boolean} Whether the string contains emoji characters.
 101                  */
 102                 function test( text ) {
 103                         // Single char. U+20E3 to detect keycaps. U+00A9 "copyright sign" and U+00AE "registered sign" not included.
 104                         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]/,
 105                         // Surrogate pair range. Only tests for the second half.
 106                         pair = /[\uDC00-\uDFFF]/;
 107
 108                         if ( text ) {
 109                                 return  pair.test( text ) || single.test( text );
 110                         }
 111
 112                         return false;
 113                 }
 114
 115                 /**
 116                  * Given an element or string, parse any emoji characters into Twemoji images.
 117                  *
 118                  * @since 4.2.0
 119                  *
 120                  * @param {HTMLElement|String} object The element or string to parse.
 121                  * @param {Object} args Additional options for Twemoji.
 122                  */
 123                 function parse( object, args ) {
 124                         var params;
 125
 126                         if ( ! replaceEmoji || ! twemoji || ! object ||
 127                                 ( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) {
 128
 129                                 return object;
 130                         }
 131
 132                         args = args || {};
 133                         params = {
 134                                 base: settings.baseUrl,
 135                                 ext: settings.ext,
 136                                 className: args.className || 'emoji',
 137                                 callback: function( icon, options ) {
 138                                         // Ignore some standard characters that TinyMCE recommends in its character map.
 139                                         switch ( icon ) {
 140                                                 case 'a9':
 141                                                 case 'ae':
 142                                                 case '2122':
 143                                                 case '2194':
 144                                                 case '2660':
 145                                                 case '2663':
 146                                                 case '2665':
 147                                                 case '2666':
 148                                                         return false;
 149                                         }
 150
 151                                         if ( ! settings.supports.flag && settings.supports.simple &&
 152                                                 ! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) ) {
 153
 154                                                 return false;
 155                                         }
 156
 157                                         return ''.concat( options.base, icon, options.ext );
 158                                 }
 159                         };
 160
 161                         if ( typeof args.imgAttr === 'object' ) {
 162                                 params.attributes = function() {
 163                                         return args.imgAttr;
 164                                 };
 165                         }
 166
 167                         return twemoji.parse( object, params );
 168                 }
 169
 170                 /**
 171                  * Initialize our emoji support, and set up listeners.
 172                  */
 173                 if ( settings ) {
 174                         replaceEmoji = ! settings.supports.simple || ! settings.supports.flag;
 175
 176                         if ( settings.DOMReady ) {
 177                                 load();
 178                         } else {
 179                                 settings.readyCallback = load;
 180                         }
 181                 }
 182
 183                 return {
 184                         replaceEmoji: replaceEmoji,
 185                         parse: parse,
 186                         test: test
 187                 };
 188         }
 189
 190         window.wp = window.wp || {};
 191         window.wp.emoji = new wpEmoji();
 192
 193 } )( window, window._wpemojiSettings );