--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/js/wp-emoji-loader.js Tue Jun 09 03:35:32 2015 +0200
@@ -0,0 +1,97 @@
+( function( window, document, settings ) {
+ var src, ready;
+
+ /**
+ * Detect if the browser supports rendering emoji or flag emoji. Flag emoji are a single glyph
+ * made of two characters, so some browsers (notably, Firefox OS X) don't support them.
+ *
+ * @since 4.2.0
+ *
+ * @param type {String} Whether to test for support of "simple" or "flag" emoji.
+ * @return {Boolean} True if the browser can render emoji, false if it cannot.
+ */
+ function browserSupportsEmoji( type ) {
+ var canvas = document.createElement( 'canvas' ),
+ context = canvas.getContext && canvas.getContext( '2d' );
+
+ if ( ! context || ! context.fillText ) {
+ return false;
+ }
+
+ /*
+ * Chrome on OS X added native emoji rendering in M41. Unfortunately,
+ * it doesn't work when the font is bolder than 500 weight. So, we
+ * check for bold rendering support to avoid invisible emoji in Chrome.
+ */
+ context.textBaseline = 'top';
+ context.font = '600 32px Arial';
+
+ if ( type === 'flag' ) {
+ /*
+ * This works because the image will be one of three things:
+ * - Two empty squares, if the browser doesn't render emoji
+ * - Two squares with 'G' and 'B' in them, if the browser doesn't render flag emoji
+ * - The British flag
+ *
+ * The first two will encode to small images (1-2KB data URLs), the third will encode
+ * to a larger image (4-5KB data URL).
+ */
+ context.fillText( String.fromCharCode( 55356, 56812, 55356, 56807 ), 0, 0 );
+ return canvas.toDataURL().length > 3000;
+ } else {
+ /*
+ * This creates a smiling emoji, and checks to see if there is any image data in the
+ * center pixel. In browsers that don't support emoji, the character will be rendered
+ * as an empty square, so the center pixel will be blank.
+ */
+ context.fillText( String.fromCharCode( 55357, 56835 ), 0, 0 );
+ return context.getImageData( 16, 16, 1, 1 ).data[0] !== 0;
+ }
+ }
+
+ function addScript( src ) {
+ var script = document.createElement( 'script' );
+
+ script.src = src;
+ script.type = 'text/javascript';
+ document.getElementsByTagName( 'head' )[0].appendChild( script );
+ }
+
+ settings.supports = {
+ simple: browserSupportsEmoji( 'simple' ),
+ flag: browserSupportsEmoji( 'flag' )
+ };
+
+ settings.DOMReady = false;
+ settings.readyCallback = function() {
+ settings.DOMReady = true;
+ };
+
+ if ( ! settings.supports.simple || ! settings.supports.flag ) {
+ ready = function() {
+ settings.readyCallback();
+ };
+
+ if ( document.addEventListener ) {
+ document.addEventListener( 'DOMContentLoaded', ready, false );
+ window.addEventListener( 'load', ready, false );
+ } else {
+ window.attachEvent( 'onload', ready );
+ document.attachEvent( 'onreadystatechange', function() {
+ if ( 'complete' === document.readyState ) {
+ settings.readyCallback();
+ }
+ } );
+ }
+
+ src = settings.source || {};
+
+ if ( src.concatemoji ) {
+ addScript( src.concatemoji );
+ } else if ( src.wpemoji && src.twemoji ) {
+ addScript( src.twemoji );
+ addScript( src.wpemoji );
+ }
+ }
+
+} )( window, document, window._wpemojiSettings );