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(function( jQuery ) {
var ralpha = /alpha\([^)]*\)/,
ropacity = /opacity=([^)]*)/,
rdashAlpha = /-([a-z])/ig,
rupper = /([A-Z])/g,
rnumpx = /^-?\d+(?:px)?$/i,
rnum = /^-?\d/,
cssShow = { position: "absolute", visibility: "hidden", display: "block" },
cssWidth = [ "Left", "Right" ],
cssHeight = [ "Top", "Bottom" ],
curCSS,
// cache check for defaultView.getComputedStyle
getComputedStyle = document.defaultView && document.defaultView.getComputedStyle,
fcamelCase = function( all, letter ) {
return letter.toUpperCase();
};
jQuery.fn.css = function( name, value ) {
return jQuery.access( this, name, value, true, function( elem, name, value ) {
jQuery.css( elem, name, value );
});
};
jQuery.extend({
cssHooks: {
opacity: {
get: function( elem ) {
// We should always get a number back from opacity
var ret = curCSS( elem, "opacity", "opacity" );
return ret === "" ? "1" : ret;
}
}
},
// exclude the following css properties to add px
cssNumber: {
"zIndex": true,
"fontWeight": true,
"opacity": true,
"zoom": true,
"lineHeight": true
},
cssProps: {
// normalize float css property
"float": jQuery.support.cssFloat ? "cssFloat" : "styleFloat"
},
css: function( elem, name, value, force, extra ) {
// don't set styles on text and comment nodes
if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
return undefined;
}
var ret, origName = name.replace( rdashAlpha, fcamelCase ),
style = elem.style || {}, hooks = jQuery.cssHooks[ origName ] || {};
name = jQuery.cssProps[ origName ] || origName;
if ( value !== undefined ) {
if ( typeof value === "number" && !jQuery.cssNumber[ origName ] ) {
value += "px";
}
if ( !("set" in hooks) || (value = hooks.set( elem, value )) === false ) {
style[ name ] = value;
}
} else {
if ( "get" in hooks && (ret = hooks.get( elem, force, extra )) !== false ) {
return ret;
}
if ( !force && name in style ) {
ret = style[ name ];
} else if ( curCSS ) {
ret = curCSS( elem, name, origName );
}
return ret;
}
},
// A method for quickly swapping in/out CSS properties to get correct calculations
swap: function( elem, options, callback ) {
var old = {};
// Remember the old values, and insert the new ones
for ( var name in options ) {
old[ name ] = elem.style[ name ];
elem.style[ name ] = options[ name ];
}
callback.call( elem );
// Revert the old values
for ( name in options ) {
elem.style[ name ] = old[ name ];
}
}
});
jQuery.each(["height", "width"], function( i, name ) {
jQuery.cssHooks[ name ] = {
get: function( elem, force, extra ) {
if ( elem.offsetWidth !== 0 ) {
val = getWH( elem, name, extra );
} else {
jQuery.swap( elem, cssShow, function() {
val = getWH( elem, name, extra );
});
}
},
set: function( elem, value ) {
// ignore negative width and height values #1599
elem.style[ name ] = Math.max( parseFloat(value), 0 ) + "px";
}
};
});
if ( !jQuery.support.opacity ) {
jQuery.cssHooks.opacity = {
get: function( elem, force ) {
// IE uses filters for opacity
return ropacity.test(elem.currentStyle.filter || "") ?
(parseFloat(RegExp.$1) / 100) + "" :
"1";
},
set: function( elem, value ) {
var style = elem.style;
// IE has trouble with opacity if it does not have layout
// Force it by setting the zoom level
style.zoom = 1;
// Set the alpha filter to set the opacity
var opacity = parseInt( value, 10 ) + "" === "NaN" ?
"" :
"alpha(opacity=" + value * 100 + ")";
var filter = style.filter || jQuery.css( elem, "filter" ) || "";
style.filter = ralpha.test(filter) ?
filter.replace(ralpha, opacity) :
opacity;
}
};
}
if ( getComputedStyle ) {
curCSS = function( elem, newName, name ) {
var ret, defaultView, computedStyle;
name = name.replace( rupper, "-$1" ).toLowerCase();
if ( !(defaultView = elem.ownerDocument.defaultView) ) {
return undefined;
}
if ( (computedStyle = defaultView.getComputedStyle( elem, null )) ) {
ret = computedStyle.getPropertyValue( name );
}
return ret;
};
} else if ( document.documentElement.currentStyle ) {
curCSS = function( elem, name ) {
var left, rsLeft, ret = elem.currentStyle[ name ];
// From the awesome hack by Dean Edwards
// http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
// If we're not dealing with a regular pixel number
// but a number that has a weird ending, we need to convert it to pixels
if ( !rnumpx.test( ret ) && rnum.test( ret ) ) {
// Remember the original values
left = style.left;
rsLeft = elem.runtimeStyle.left;
// Put in the new values to get a computed value out
elem.runtimeStyle.left = elem.currentStyle.left;
style.left = name === "fontSize" ? "1em" : (ret || 0);
ret = style.pixelLeft + "px";
// Revert the changed values
style.left = left;
elem.runtimeStyle.left = rsLeft;
}
return ret;
};
}
function getWH( elem, name, extra ) {
var which = name === "width" ? cssWidth : cssHeight,
val = name === "width" ? elem.offsetWidth : elem.offsetHeight;
if ( extra === "border" ) {
return val;
}
jQuery.each( which, function() {
if ( !extra ) {
val -= parseFloat(jQuery.css( elem, "padding" + this, undefined, true)) || 0;
}
if ( extra === "margin" ) {
val += parseFloat(jQuery.css( elem, "margin" + this, undefined, true)) || 0;
} else {
val -= parseFloat(jQuery.css( elem, "border" + this + "Width", undefined, true)) || 0;
}
});
return val;
}
if ( jQuery.expr && jQuery.expr.filters ) {
jQuery.expr.filters.hidden = function( elem ) {
var width = elem.offsetWidth, height = elem.offsetHeight,
skip = elem.nodeName.toLowerCase() === "tr";
return width === 0 && height === 0 && !skip ?
true :
width > 0 && height > 0 && !skip ?
false :
jQuery.css(elem, "display") === "none";
};
jQuery.expr.filters.visible = function( elem ) {
return !jQuery.expr.filters.hidden( elem );
};
}
})( jQuery );
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