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                 // Private
   7                 twemoji, timer,
   8                 loaded = false,
   9                 count = 0,
  10                 ie11 = window.navigator.userAgent.indexOf( 'Trident/7.0' ) > 0;
  11
  12                 /**
  13                  * Runs when the document load event is fired, so we can do our first parse of the page.
  14                  *
  15                  * @since 4.2.0
  16                  */
  17                 function load() {
  18                         if ( loaded ) {
  19                                 return;
  20                         }
  21
  22                         if ( typeof window.twemoji === 'undefined' ) {
  23                                 // Break if waiting for longer than 30 sec.
  24                                 if ( count > 600 ) {
  25                                         return;
  26                                 }
  27
  28                                 // Still waiting.
  29                                 window.clearTimeout( timer );
  30                                 timer = window.setTimeout( load, 50 );
  31                                 count++;
  32
  33                                 return;
  34                         }
  35
  36                         twemoji = window.twemoji;
  37                         loaded = true;
  38
  39                         if ( MutationObserver ) {
  40                                 new MutationObserver( function( mutationRecords ) {
  41                                         var i = mutationRecords.length,
  42                                                 addedNodes, removedNodes, ii, node;
  43
  44                                         while ( i-- ) {
  45                                                 addedNodes = mutationRecords[ i ].addedNodes;
  46                                                 removedNodes = mutationRecords[ i ].removedNodes;
  47                                                 ii = addedNodes.length;
  48
  49                                                 if (
  50                                                         ii === 1 && removedNodes.length === 1 &&
  51                                                         addedNodes[0].nodeType === 3 &&
  52                                                         removedNodes[0].nodeName === 'IMG' &&
  53                                                         addedNodes[0].data === removedNodes[0].alt &&
  54                                                         'load-failed' === removedNodes[0].getAttribute( 'data-error' )
  55                                                 ) {
  56                                                         return;
  57                                                 }
  58
  59                                                 while ( ii-- ) {
  60                                                         node = addedNodes[ ii ];
  61
  62                                                         if ( node.nodeType === 3 ) {
  63                                                                 if ( ! node.parentNode ) {
  64                                                                         continue;
  65                                                                 }
  66
  67                                                                 if ( ie11 ) {
  68                                                                         /*
  69                                                                          * IE 11's implementation of MutationObserver is buggy.
  70                                                                          * It unnecessarily splits text nodes when it encounters a HTML
  71                                                                          * template interpolation symbol ( "{{", for example ). So, we
  72                                                                          * join the text nodes back together as a work-around.
  73                                                                          */
  74                                                                         while( node.nextSibling && 3 === node.nextSibling.nodeType ) {
  75                                                                                 node.nodeValue = node.nodeValue + node.nextSibling.nodeValue;
  76                                                                                 node.parentNode.removeChild( node.nextSibling );
  77                                                                         }
  78                                                                 }
  79
  80                                                                 node = node.parentNode;
  81                                                         }
  82
  83                                                         if ( ! node || node.nodeType !== 1 ||
  84                                                                 ( node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {
  85
  86                                                                 continue;
  87                                                         }
  88
  89                                                         if ( test( node.textContent ) ) {
  90                                                                 parse( node );
  91                                                         }
  92                                                 }
  93                                         }
  94                                 } ).observe( document.body, {
  95                                         childList: true,
  96                                         subtree: true
  97                                 } );
  98                         }
  99
 100                         parse( document.body );
 101                 }
 102
 103                 /**
 104                  * Test if a text string contains emoji characters.
 105                  *
 106                  * @since 4.3.0
 107                  *
 108                  * @param {String} text The string to test
 109                  *
 110                  * @return {Boolean} Whether the string contains emoji characters.
 111                  */
 112                 function test( text ) {
 113                         // Single char. U+20E3 to detect keycaps. U+00A9 "copyright sign" and U+00AE "registered sign" not included.
 114                         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]/,
 115                         // Surrogate pair range. Only tests for the second half.
 116                         pair = /[\uDC00-\uDFFF]/;
 117
 118                         if ( text ) {
 119                                 return  pair.test( text ) || single.test( text );
 120                         }
 121
 122                         return false;
 123                 }
 124
 125                 /**
 126                  * Given an element or string, parse any emoji characters into Twemoji images.
 127                  *
 128                  * @since 4.2.0
 129                  *
 130                  * @param {HTMLElement|String} object The element or string to parse.
 131                  * @param {Object} args Additional options for Twemoji.
 132                  */
 133                 function parse( object, args ) {
 134                         var params;
 135
 136                         if ( settings.supports.everything || ! twemoji || ! object ||
 137                                 ( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) {
 138
 139                                 return object;
 140                         }
 141
 142                         args = args || {};
 143                         params = {
 144                                 base: settings.baseUrl,
 145                                 ext: settings.ext,
 146                                 className: args.className || 'emoji',
 147                                 callback: function( icon, options ) {
 148                                         // Ignore some standard characters that TinyMCE recommends in its character map.
 149                                         switch ( icon ) {
 150                                                 case 'a9':
 151                                                 case 'ae':
 152                                                 case '2122':
 153                                                 case '2194':
 154                                                 case '2660':
 155                                                 case '2663':
 156                                                 case '2665':
 157                                                 case '2666':
 158                                                         return false;
 159                                         }
 160
 161                                         if ( settings.supports.everythingExceptFlag && ! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) ) {
 162
 163                                                 return false;
 164                                         }
 165
 166                                         return ''.concat( options.base, icon, options.ext );
 167                                 },
 168                                 onerror: function() {
 169                                         if ( twemoji.parentNode ) {
 170                                                 this.setAttribute( 'data-error', 'load-failed' );
 171                                                 twemoji.parentNode.replaceChild( document.createTextNode( twemoji.alt ), twemoji );
 172                                         }
 173                                 }
 174                         };
 175
 176                         if ( typeof args.imgAttr === 'object' ) {
 177                                 params.attributes = function() {
 178                                         return args.imgAttr;
 179                                 };
 180                         }
 181
 182                         return twemoji.parse( object, params );
 183                 }
 184
 185                 /**
 186                  * Initialize our emoji support, and set up listeners.
 187                  */
 188                 if ( settings ) {
 189                         if ( settings.DOMReady ) {
 190                                 load();
 191                         } else {
 192                                 settings.readyCallback = load;
 193                         }
 194                 }
 195
 196                 return {
 197                         parse: parse,
 198                         test: test
 199                 };
 200         }
 201
 202         window.wp = window.wp || {};
 203         window.wp.emoji = new wpEmoji();
 204
 205 } )( window, window._wpemojiSettings );