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define([
"../core",
"../var/support"
], function( jQuery, support ) {
(function() {
var a, reliableHiddenOffsetsVal, boxSizingVal, boxSizingReliableVal,
pixelPositionVal,
div = document.createElement( "div" ),
containerStyles = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px",
// Support: Firefox<29, Android 2.3 (Prefixed box-sizing versions).
divReset =
"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box;" +
"display:block;padding:0;margin:0;border:0";
// Setup
div.innerHTML = " <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
a = div.getElementsByTagName( "a" )[ 0 ];
a.style.cssText = "float:left;opacity:.5";
// Make sure that element opacity exists
// (IE uses filter instead)
// Use a regex to work around a WebKit issue. See #5145
support.opacity = /^0.5/.test( a.style.opacity );
// Verify style float existence
// (IE uses styleFloat instead of cssFloat)
support.cssFloat = !!a.style.cssFloat;
div.style.backgroundClip = "content-box";
div.cloneNode( true ).style.backgroundClip = "";
support.clearCloneStyle = div.style.backgroundClip === "content-box";
// Null elements to avoid leaks in IE.
a = div = null;
jQuery.extend(support, {
reliableHiddenOffsets: function() {
if ( reliableHiddenOffsetsVal != null ) {
return reliableHiddenOffsetsVal;
}
var container, tds, isSupported,
div = document.createElement( "div" ),
body = document.getElementsByTagName( "body" )[ 0 ];
if ( !body ) {
// Return for frameset docs that don't have a body
return;
}
// Setup
div.setAttribute( "className", "t" );
div.innerHTML = " <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
container = document.createElement( "div" );
container.style.cssText = containerStyles;
body.appendChild( container ).appendChild( div );
// Support: IE8
// Check if table cells still have offsetWidth/Height when they are set
// to display:none and there are still other visible table cells in a
// table row; if so, offsetWidth/Height are not reliable for use when
// determining if an element has been hidden directly using
// display:none (it is still safe to use offsets if a parent element is
// hidden; don safety goggles and see bug #4512 for more information).
div.innerHTML = "<table><tr><td></td><td>t</td></tr></table>";
tds = div.getElementsByTagName( "td" );
tds[ 0 ].style.cssText = "padding:0;margin:0;border:0;display:none";
isSupported = ( tds[ 0 ].offsetHeight === 0 );
tds[ 0 ].style.display = "";
tds[ 1 ].style.display = "none";
// Support: IE8
// Check if empty table cells still have offsetWidth/Height
reliableHiddenOffsetsVal = isSupported && ( tds[ 0 ].offsetHeight === 0 );
body.removeChild( container );
// Null elements to avoid leaks in IE.
div = body = null;
return reliableHiddenOffsetsVal;
},
boxSizing: function() {
if ( boxSizingVal == null ) {
computeStyleTests();
}
return boxSizingVal;
},
boxSizingReliable: function() {
if ( boxSizingReliableVal == null ) {
computeStyleTests();
}
return boxSizingReliableVal;
},
pixelPosition: function() {
if ( pixelPositionVal == null ) {
computeStyleTests();
}
return pixelPositionVal;
},
// Support: Android 2.3
reliableMarginRight: function() {
var body, container, div, marginDiv,
// Support: IE<9.
// IE should pass the test but we're using getComputedStyle
// to compute it so just return true if the method is not present.
reliableMarginRightVal = true;
// Use window.getComputedStyle because jsdom on node.js will break without it.
if ( window.getComputedStyle ) {
body = document.getElementsByTagName( "body" )[ 0 ];
if ( !body ) {
// Test fired too early or in an unsupported environment, exit.
return;
}
container = document.createElement( "div" );
div = document.createElement( "div" );
container.style.cssText = containerStyles;
body.appendChild( container ).appendChild( div );
// Check if div with explicit width and no margin-right incorrectly
// gets computed margin-right based on width of container. (#3333)
// Fails in WebKit before Feb 2011 nightlies
// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
marginDiv = div.appendChild( document.createElement( "div" ) );
marginDiv.style.cssText = div.style.cssText = divReset;
marginDiv.style.marginRight = marginDiv.style.width = "0";
div.style.width = "1px";
reliableMarginRightVal =
!parseFloat( ( window.getComputedStyle( marginDiv, null ) || {} ).marginRight );
body.removeChild( container );
}
return reliableMarginRightVal;
}
});
function computeStyleTests() {
var container, div,
body = document.getElementsByTagName( "body" )[ 0 ];
if ( !body ) {
// Test fired too early or in an unsupported environment, exit.
return;
}
container = document.createElement( "div" );
div = document.createElement( "div" );
container.style.cssText = containerStyles;
body.appendChild( container ).appendChild( div );
// Support: Firefox<29, Android 2.3 (Prefixed box-sizing versions).
div.style.cssText =
"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;" +
"position:absolute;display:block;padding:1px;border:1px;width:4px;" +
"margin-top:1%;top:1%";
// Workaround failing boxSizing test due to offsetWidth returning wrong value
// with some non-1 values of body zoom, ticket #13543
jQuery.swap( body, body.style.zoom != null ? { zoom: 1 } : {}, function() {
boxSizingVal = div.offsetWidth === 4;
});
// Will be changed later if needed.
boxSizingReliableVal = true;
pixelPositionVal = false;
// Use window.getComputedStyle because jsdom on node.js will break without it.
if ( window.getComputedStyle ) {
pixelPositionVal = ( window.getComputedStyle( div, null ) || {} ).top !== "1%";
boxSizingReliableVal =
( window.getComputedStyle( div, null ) || { width: "4px" } ).width === "4px";
}
body.removeChild( container );
// Null elements to avoid leaks in IE.
div = body = null;
}
})();
return support;
});
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