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                 // Compression and maintain local scope
   7                 document = window.document,
   8
   9                 // Private
  10                 twemoji, timer,
  11                 loaded = false,
  12                 count = 0,
  13                 ie11 = window.navigator.userAgent.indexOf( 'Trident/7.0' ) > 0;
  14
  15                 /**
  16                  * Detect if the browser supports SVG.
  17                  *
  18                  * @since 4.6.0
  19                  *
  20                  * @return {Boolean} True if the browser supports svg, false if not.
  21                  */
  22                 function browserSupportsSvgAsImage() {
  23                         if ( !! document.implementation.hasFeature ) {
  24                                 // Source: Modernizr
  25                                 // https://github.com/Modernizr/Modernizr/blob/master/feature-detects/svg/asimg.js
  26                                 return document.implementation.hasFeature( 'http://www.w3.org/TR/SVG11/feature#Image', '1.1' );
  27                         }
  28
  29                         // document.implementation.hasFeature is deprecated. It can be presumed
  30                         // if future browsers remove it, the browser will support SVGs as images.
  31                         return true;
  32                 }
  33
  34                 /**
  35                  * Runs when the document load event is fired, so we can do our first parse of the page.
  36                  *
  37                  * @since 4.2.0
  38                  */
  39                 function load() {
  40                         if ( loaded ) {
  41                                 return;
  42                         }
  43
  44                         if ( typeof window.twemoji === 'undefined' ) {
  45                                 // Break if waiting for longer than 30 sec.
  46                                 if ( count > 600 ) {
  47                                         return;
  48                                 }
  49
  50                                 // Still waiting.
  51                                 window.clearTimeout( timer );
  52                                 timer = window.setTimeout( load, 50 );
  53                                 count++;
  54
  55                                 return;
  56                         }
  57
  58                         twemoji = window.twemoji;
  59                         loaded = true;
  60
  61                         if ( MutationObserver ) {
  62                                 new MutationObserver( function( mutationRecords ) {
  63                                         var i = mutationRecords.length,
  64                                                 addedNodes, removedNodes, ii, node;
  65
  66                                         while ( i-- ) {
  67                                                 addedNodes = mutationRecords[ i ].addedNodes;
  68                                                 removedNodes = mutationRecords[ i ].removedNodes;
  69                                                 ii = addedNodes.length;
  70
  71                                                 if (
  72                                                         ii === 1 && removedNodes.length === 1 &&
  73                                                         addedNodes[0].nodeType === 3 &&
  74                                                         removedNodes[0].nodeName === 'IMG' &&
  75                                                         addedNodes[0].data === removedNodes[0].alt &&
  76                                                         'load-failed' === removedNodes[0].getAttribute( 'data-error' )
  77                                                 ) {
  78                                                         return;
  79                                                 }
  80
  81                                                 while ( ii-- ) {
  82                                                         node = addedNodes[ ii ];
  83
  84                                                         if ( node.nodeType === 3 ) {
  85                                                                 if ( ! node.parentNode ) {
  86                                                                         continue;
  87                                                                 }
  88
  89                                                                 if ( ie11 ) {
  90                                                                         /*
  91                                                                          * IE 11's implementation of MutationObserver is buggy.
  92                                                                          * It unnecessarily splits text nodes when it encounters a HTML
  93                                                                          * template interpolation symbol ( "{{", for example ). So, we
  94                                                                          * join the text nodes back together as a work-around.
  95                                                                          */
  96                                                                         while( node.nextSibling && 3 === node.nextSibling.nodeType ) {
  97                                                                                 node.nodeValue = node.nodeValue + node.nextSibling.nodeValue;
  98                                                                                 node.parentNode.removeChild( node.nextSibling );
  99                                                                         }
 100                                                                 }
 101
 102                                                                 node = node.parentNode;
 103                                                         }
 104
 105                                                         if ( ! node || node.nodeType !== 1 ||
 106                                                                 ( node.className && typeof node.className === 'string' && node.className.indexOf( 'wp-exclude-emoji' ) !== -1 ) ) {
 107
 108                                                                 continue;
 109                                                         }
 110
 111                                                         if ( test( node.textContent ) ) {
 112                                                                 parse( node );
 113                                                         }
 114                                                 }
 115                                         }
 116                                 } ).observe( document.body, {
 117                                         childList: true,
 118                                         subtree: true
 119                                 } );
 120                         }
 121
 122                         parse( document.body );
 123                 }
 124
 125                 /**
 126                  * Test if a text string contains emoji characters.
 127                  *
 128                  * @since 4.3.0
 129                  *
 130                  * @param {String} text The string to test
 131                  *
 132                  * @return {Boolean} Whether the string contains emoji characters.
 133                  */
 134                 function test( text ) {
 135                         // Single char. U+20E3 to detect keycaps. U+00A9 "copyright sign" and U+00AE "registered sign" not included.
 136                         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]/,
 137                         // Surrogate pair range. Only tests for the second half.
 138                         pair = /[\uDC00-\uDFFF]/;
 139
 140                         if ( text ) {
 141                                 return  pair.test( text ) || single.test( text );
 142                         }
 143
 144                         return false;
 145                 }
 146
 147                 /**
 148                  * Given an element or string, parse any emoji characters into Twemoji images.
 149                  *
 150                  * @since 4.2.0
 151                  *
 152                  * @param {HTMLElement|String} object The element or string to parse.
 153                  * @param {Object} args Additional options for Twemoji.
 154                  */
 155                 function parse( object, args ) {
 156                         var params;
 157
 158                         if ( settings.supports.everything || ! twemoji || ! object ||
 159                                 ( 'string' !== typeof object && ( ! object.childNodes || ! object.childNodes.length ) ) ) {
 160
 161                                 return object;
 162                         }
 163
 164                         args = args || {};
 165                         params = {
 166                                 base: browserSupportsSvgAsImage() ? settings.svgUrl : settings.baseUrl,
 167                                 ext:  browserSupportsSvgAsImage() ? settings.svgExt : settings.ext,
 168                                 className: args.className || 'emoji',
 169                                 callback: function( icon, options ) {
 170                                         // Ignore some standard characters that TinyMCE recommends in its character map.
 171                                         switch ( icon ) {
 172                                                 case 'a9':
 173                                                 case 'ae':
 174                                                 case '2122':
 175                                                 case '2194':
 176                                                 case '2660':
 177                                                 case '2663':
 178                                                 case '2665':
 179                                                 case '2666':
 180                                                         return false;
 181                                         }
 182
 183                                         if ( settings.supports.everythingExceptFlag &&
 184                                                 ! /^1f1(?:e[6-9a-f]|f[0-9a-f])-1f1(?:e[6-9a-f]|f[0-9a-f])$/.test( icon ) && // Country flags
 185                                                 ! /^(1f3f3-fe0f-200d-1f308|1f3f4-200d-2620-fe0f)$/.test( icon )             // Rainbow and pirate flags
 186                                         ) {
 187                                                 return false;
 188                                         }
 189
 190                                         return ''.concat( options.base, icon, options.ext );
 191                                 },
 192                                 onerror: function() {
 193                                         if ( twemoji.parentNode ) {
 194                                                 this.setAttribute( 'data-error', 'load-failed' );
 195                                                 twemoji.parentNode.replaceChild( document.createTextNode( twemoji.alt ), twemoji );
 196                                         }
 197                                 }
 198                         };
 199
 200                         if ( typeof args.imgAttr === 'object' ) {
 201                                 params.attributes = function() {
 202                                         return args.imgAttr;
 203                                 };
 204                         }
 205
 206                         return twemoji.parse( object, params );
 207                 }
 208
 209                 /**
 210                  * Initialize our emoji support, and set up listeners.
 211                  */
 212                 if ( settings ) {
 213                         if ( settings.DOMReady ) {
 214                                 load();
 215                         } else {
 216                                 settings.readyCallback = load;
 217                         }
 218                 }
 219
 220                 return {
 221                         parse: parse,
 222                         test: test
 223                 };
 224         }
 225
 226         window.wp = window.wp || {};
 227         window.wp.emoji = new wpEmoji();
 228
 229 } )( window, window._wpemojiSettings );