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wp-emoji-loader.js
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/** * @output wp-includes/js/wp-emoji-loader.js */ ( function( window, document, settings ) { var src, ready, ii, tests; // Create a canvas element for testing native browser support of emoji. var canvas = document.createElement( 'canvas' ); var context = canvas.getContext && canvas.getContext( '2d' ); /** * Checks if two sets of Emoji characters render the same visually. * * @since 4.9.0 * * @private * * @param {number[]} set1 Set of Emoji character codes. * @param {number[]} set2 Set of Emoji character codes. * * @return {boolean} True if the two sets render the same. */ function emojiSetsRenderIdentically( set1, set2 ) { var stringFromCharCode = String.fromCharCode; // Cleanup from previous test. context.clearRect( 0, 0, canvas.width, canvas.height ); context.fillText( stringFromCharCode.apply( this, set1 ), 0, 0 ); var rendered1 = canvas.toDataURL(); // Cleanup from previous test. context.clearRect( 0, 0, canvas.width, canvas.height ); context.fillText( stringFromCharCode.apply( this, set2 ), 0, 0 ); var rendered2 = canvas.toDataURL(); return rendered1 === rendered2; } /** * Detects 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 * * @private * * @param {string} type Whether to test for support of "flag" or "emoji". * * @return {boolean} True if the browser can render emoji, false if it cannot. */ function browserSupportsEmoji( type ) { var isIdentical; 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'; switch ( type ) { case 'flag': /* * Test for Transgender flag compatibility. This flag is shortlisted for the Emoji 13 spec, * but has landed in Twemoji early, so we can add support for it, too. * * To test for support, we try to render it, and compare the rendering to how it would look if * the browser doesn't render it correctly (white flag emoji + transgender symbol). */ isIdentical = emojiSetsRenderIdentically( [ 0x1F3F3, 0xFE0F, 0x200D, 0x26A7, 0xFE0F ], [ 0x1F3F3, 0xFE0F, 0x200B, 0x26A7, 0xFE0F ] ); if ( isIdentical ) { return false; } /* * Test for UN flag compatibility. This is the least supported of the letter locale flags, * so gives us an easy test for full support. * * To test for support, we try to render it, and compare the rendering to how it would look if * the browser doesn't render it correctly ([U] + [N]). */ isIdentical = emojiSetsRenderIdentically( [ 0xD83C, 0xDDFA, 0xD83C, 0xDDF3 ], [ 0xD83C, 0xDDFA, 0x200B, 0xD83C, 0xDDF3 ] ); if ( isIdentical ) { return false; } /* * Test for English flag compatibility. England is a country in the United Kingdom, it * does not have a two letter locale code but rather an five letter sub-division code. * * To test for support, we try to render it, and compare the rendering to how it would look if * the browser doesn't render it correctly (black flag emoji + [G] + [B] + [E] + [N] + [G]). */ isIdentical = emojiSetsRenderIdentically( [ 0xD83C, 0xDFF4, 0xDB40, 0xDC67, 0xDB40, 0xDC62, 0xDB40, 0xDC65, 0xDB40, 0xDC6E, 0xDB40, 0xDC67, 0xDB40, 0xDC7F ], [ 0xD83C, 0xDFF4, 0x200B, 0xDB40, 0xDC67, 0x200B, 0xDB40, 0xDC62, 0x200B, 0xDB40, 0xDC65, 0x200B, 0xDB40, 0xDC6E, 0x200B, 0xDB40, 0xDC67, 0x200B, 0xDB40, 0xDC7F ] ); return ! isIdentical; case 'emoji': /* * Burning Love: Just a hunk, a hunk of burnin' love. * * To test for Emoji 13.1 support, try to render a new emoji: Heart on Fire! * * The Heart on Fire emoji is a ZWJ sequence combining ❤️ Red Heart, a Zero Width Joiner and 🔥 Fire. * * 0x2764, 0xfe0f == Red Heart emoji. * 0x200D == Zero-Width Joiner (ZWJ) that links the two code points for the new emoji or * 0x200B == Zero-Width Space (ZWS) that is rendered for clients not supporting the new emoji. * 0xD83D, 0xDD25 == Fire. * * When updating this test for future Emoji releases, ensure that individual emoji that make up the * sequence come from older emoji standards. */ isIdentical = emojiSetsRenderIdentically( [0x2764, 0xfe0f, 0x200D, 0xD83D, 0xDD25], [0x2764, 0xfe0f, 0x200B, 0xD83D, 0xDD25] ); return ! isIdentical; } return false; } /** * Adds a script to the head of the document. * * @ignore * * @since 4.2.0 * * @param {Object} src The url where the script is located. * @return {void} */ function addScript( src ) { var script = document.createElement( 'script' ); script.src = src; script.defer = script.type = 'text/javascript'; document.getElementsByTagName( 'head' )[0].appendChild( script ); } tests = Array( 'flag', 'emoji' ); settings.supports = { everything: true, everythingExceptFlag: true }; /* * Tests the browser support for flag emojis and other emojis, and adjusts the * support settings accordingly. */ for( ii = 0; ii < tests.length; ii++ ) { settings.supports[ tests[ ii ] ] = browserSupportsEmoji( tests[ ii ] ); settings.supports.everything = settings.supports.everything && settings.supports[ tests[ ii ] ]; if ( 'flag' !== tests[ ii ] ) { settings.supports.everythingExceptFlag = settings.supports.everythingExceptFlag && settings.supports[ tests[ ii ] ]; } } settings.supports.everythingExceptFlag = settings.supports.everythingExceptFlag && ! settings.supports.flag; // Sets DOMReady to false and assigns a ready function to settings. settings.DOMReady = false; settings.readyCallback = function() { settings.DOMReady = true; }; // When the browser can not render everything we need to load a polyfill. if ( ! settings.supports.everything ) { ready = function() { settings.readyCallback(); }; /* * Cross-browser version of adding a dom ready event. */ 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 );
/home/sudancam/.trash/wp-includes/block-supports/../assets/../js/wp-emoji-loader.js