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.className && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {
  74                                                                 continue;
  75                                                         }
  76
  77                                                         if ( node && node.nodeType === 1 ) {
  78                                                                 parse( node );
  79                                                         }
  80                                                 }
  81                                         }
  82                                 } ).observe( document.body, {
  83                                         childList: true,
  84                                         subtree: true
  85                                 } );
  86                         }
  87
  88                         parse( document.body );
  89                 }
  90
  91                 /**
  92                  * Given an element or string, parse any emoji characters into Twemoji images.
  93                  *
  94                  * @since 4.2.0
  95                  *
  96                  * @param {HTMLElement|String} object The element or string to parse.
  97                  * @param {Object} args Additional options for Twemoji.
  98                  */
  99                 function parse( object, args ) {
 100                         if ( ! replaceEmoji || ! twemoji ) {
 101                                 return object;
 102                         }
 103
 104                         args = args || {};
 105
 106                         return twemoji.parse( object, {
 107                                 base: settings.baseUrl,
 108                                 ext: settings.ext,
 109                                 className: args.className || 'emoji',
 110                                 imgAttr: args.imgAttr,
 111                                 callback: function( icon, options ) {
 112                                         // Ignore some standard characters that TinyMCE recommends in its character map.
 113                                         switch ( icon ) {
 114                                                 case 'a9':
 115                                                 case 'ae':
 116                                                 case '2122':
 117                                                 case '2194':
 118                                                 case '2660':
 119                                                 case '2663':
 120                                                 case '2665':
 121                                                 case '2666':
 122                                                         return false;
 123                                         }
 124
 125                                         if ( ! settings.supports.flag && settings.supports.simple &&
 126                                                 ! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) ) {
 127
 128                                                 return false;
 129                                         }
 130
 131                                         return ''.concat( options.base, icon, options.ext );
 132                                 }
 133                         } );
 134                 }
 135
 136                 /**
 137                  * Initialize our emoji support, and set up listeners.
 138                  */
 139                 if ( settings ) {
 140                         replaceEmoji = ! settings.supports.simple || ! settings.supports.flag;
 141
 142                         if ( settings.DOMReady ) {
 143                                 load();
 144                         } else {
 145                                 settings.readyCallback = load;
 146                         }
 147                 }
 148
 149                 return {
 150                         replaceEmoji: replaceEmoji,
 151                         parse: parse
 152                 };
 153         }
 154
 155         window.wp = window.wp || {};
 156         window.wp.emoji = new wpEmoji();
 157
 158 } )( window, window._wpemojiSettings );