29 lines
1.3 KiB
JavaScript
29 lines
1.3 KiB
JavaScript
( function ( $ ) {
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'use strict';
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var img, url;
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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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$( '.mwe-math-fallback-image-inline, .mwe-math-fallback-image-display' ).each(function() {
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// Create a new PNG image to use as the fallback.
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img = document.createElement('img');
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url = this.style.backgroundImage.match(/url\('?([^']*)'?\)/)[1];
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img.setAttribute( 'src', url.replace('mode=' + 'mathml', 'mode=' + 'png') );
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img.setAttribute( 'class', 'tex mwe-math-fallback-image-' + ($( this ).hasClass('mwe-math-fallback-image-inline') ? 'inline' : 'display') );
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img.setAttribute( 'aria-hidden', 'true' );
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this.parentNode.insertBefore( img, this );
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// Hide the SVG fallback.
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$( this ).css( 'display', 'none' );
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});
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}
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}( jQuery ) );
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