import from la bonne adresse and first refactoring for ouidade.com
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// Browser support test for the HTML5 <ruby>, <rt> and <rp> elements
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// http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-ruby-element
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//
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// by @alrra
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Modernizr.addTest('ruby', function () {
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var ruby = document.createElement('ruby'),
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rt = document.createElement('rt'),
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rp = document.createElement('rp'),
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docElement = document.documentElement,
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displayStyleProperty = 'display',
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fontSizeStyleProperty = 'fontSize'; // 'fontSize' - because it`s only used for IE6 and IE7
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ruby.appendChild(rp);
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ruby.appendChild(rt);
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docElement.appendChild(ruby);
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// browsers that support <ruby> hide the <rp> via "display:none"
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if ( getStyle(rp, displayStyleProperty) == 'none' || // for non-IE browsers
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// but in IE browsers <rp> has "display:inline" so, the test needs other conditions:
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getStyle(ruby, displayStyleProperty) == 'ruby' && getStyle(rt, displayStyleProperty) == 'ruby-text' || // for IE8 & IE9
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getStyle(rp, fontSizeStyleProperty) == '6pt' && getStyle(rt, fontSizeStyleProperty) == '6pt' ) { // for IE6 & IE7
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cleanUp();
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return true;
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} else {
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cleanUp();
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return false;
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}
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function getStyle( element, styleProperty ) {
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var result;
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if ( window.getComputedStyle ) { // for non-IE browsers
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result = document.defaultView.getComputedStyle(element,null).getPropertyValue(styleProperty);
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} else if ( element.currentStyle ) { // for IE
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result = element.currentStyle[styleProperty];
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}
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return result;
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}
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function cleanUp() {
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docElement.removeChild(ruby);
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// the removed child node still exists in memory, so ...
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ruby = null;
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rt = null;
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rp = null;
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}
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});
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