39 lines
1.6 KiB
JavaScript
39 lines
1.6 KiB
JavaScript
( function ( $ ) {
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'use strict';
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var img, url;
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function insertImg( png ) {
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$( '.mwe-math-fallback-image-inline, .mwe-math-fallback-image-display' ).each( function ( ) {
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// Create a new image to use as the fallback.
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img = document.createElement( 'img' );
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url = this.style.backgroundImage.match( /url\(\s*(['"]?)([^\1\)]*)\1\s*\)/ )[ 2 ];
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if ( png ) {
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url = url.replace( 'media/math/render/svg/', 'media/math/render/png/' );
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}
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img.setAttribute( 'src', url );
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img.setAttribute( 'class', 'tex mwe-math-fallback-image-' + ( $( this ).hasClass( 'mwe-math-fallback-image-inline' ) ? 'inline' : 'display' ) );
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img.setAttribute( 'aria-hidden', 'true' );
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this.parentNode.insertBefore( img, this );
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// Hide the old SVG fallback.
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$( this ).css( 'display', 'none' );
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} );
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}
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// If MathPlayer is installed we show the MathML rendering.
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if ( navigator.userAgent.indexOf( 'MathPlayer' ) > -1 ) {
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$( '.mwe-math-mathml-a11y' ).removeClass( 'mwe-math-mathml-a11y' );
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$( '.mwe-math-fallback-image-inline, .mwe-math-fallback-image-display' ).css( 'display', 'none' );
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return;
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}
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// We verify whether SVG as <img> is supported and otherwise use the
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// PNG fallback. See https://github.com/Modernizr/Modernizr/blob/master/feature-detects/svg/asimg.js
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if ( !document.implementation.hasFeature( 'http://www.w3.org/TR/SVG11/feature#Image', '1.1' ) ) {
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insertImg( true );
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} else if ( $.client.profile().name.match( /msie|edge/ ) ) {
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// For all IE versions the meta tags are rendered blurry, while img tags are rendered fine.
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insertImg( false );
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}
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}( jQuery ) );
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