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bower_components/jquery/src/css/support.js
vendored
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121
bower_components/jquery/src/css/support.js
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define( [
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"../core",
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"../var/document",
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"../var/documentElement",
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"../var/support"
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], function( jQuery, document, documentElement, support ) {
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( function() {
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var pixelPositionVal, boxSizingReliableVal, pixelMarginRightVal, reliableMarginLeftVal,
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container = document.createElement( "div" ),
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div = document.createElement( "div" );
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// Finish early in limited (non-browser) environments
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if ( !div.style ) {
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return;
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}
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// Support: IE9-11+
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// Style of cloned element affects source element cloned (#8908)
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div.style.backgroundClip = "content-box";
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div.cloneNode( true ).style.backgroundClip = "";
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support.clearCloneStyle = div.style.backgroundClip === "content-box";
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container.style.cssText = "border:0;width:8px;height:0;top:0;left:-9999px;" +
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"padding:0;margin-top:1px;position:absolute";
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container.appendChild( div );
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// Executing both pixelPosition & boxSizingReliable tests require only one layout
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// so they're executed at the same time to save the second computation.
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function computeStyleTests() {
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div.style.cssText =
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// Support: Firefox<29, Android 2.3
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// Vendor-prefix box-sizing
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"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;" +
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"position:relative;display:block;" +
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"margin:auto;border:1px;padding:1px;" +
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"top:1%;width:50%";
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div.innerHTML = "";
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documentElement.appendChild( container );
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var divStyle = window.getComputedStyle( div );
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pixelPositionVal = divStyle.top !== "1%";
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reliableMarginLeftVal = divStyle.marginLeft === "2px";
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boxSizingReliableVal = divStyle.width === "4px";
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// Support: Android 4.0 - 4.3 only
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// Some styles come back with percentage values, even though they shouldn't
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div.style.marginRight = "50%";
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pixelMarginRightVal = divStyle.marginRight === "4px";
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documentElement.removeChild( container );
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}
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jQuery.extend( support, {
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pixelPosition: function() {
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// This test is executed only once but we still do memoizing
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// since we can use the boxSizingReliable pre-computing.
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// No need to check if the test was already performed, though.
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computeStyleTests();
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return pixelPositionVal;
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},
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boxSizingReliable: function() {
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if ( boxSizingReliableVal == null ) {
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computeStyleTests();
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}
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return boxSizingReliableVal;
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},
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pixelMarginRight: function() {
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// Support: Android 4.0-4.3
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// We're checking for boxSizingReliableVal here instead of pixelMarginRightVal
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// since that compresses better and they're computed together anyway.
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if ( boxSizingReliableVal == null ) {
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computeStyleTests();
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}
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return pixelMarginRightVal;
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},
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reliableMarginLeft: function() {
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// Support: IE <=8 only, Android 4.0 - 4.3 only, Firefox <=3 - 37
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if ( boxSizingReliableVal == null ) {
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computeStyleTests();
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}
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return reliableMarginLeftVal;
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},
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reliableMarginRight: function() {
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// Support: Android 2.3
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// Check if div with explicit width and no margin-right incorrectly
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// gets computed margin-right based on width of container. (#3333)
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// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
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// This support function is only executed once so no memoizing is needed.
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var ret,
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marginDiv = div.appendChild( document.createElement( "div" ) );
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// Reset CSS: box-sizing; display; margin; border; padding
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marginDiv.style.cssText = div.style.cssText =
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// Support: Android 2.3
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// Vendor-prefix box-sizing
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"-webkit-box-sizing:content-box;box-sizing:content-box;" +
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"display:block;margin:0;border:0;padding:0";
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marginDiv.style.marginRight = marginDiv.style.width = "0";
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div.style.width = "1px";
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documentElement.appendChild( container );
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ret = !parseFloat( window.getComputedStyle( marginDiv ).marginRight );
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documentElement.removeChild( container );
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div.removeChild( marginDiv );
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return ret;
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}
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} );
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} )();
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return support;
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} );
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