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Broke apart some of the browser-specific logic for CSS handling.

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This commit is contained in:
John Resig 2010-09-05 00:04:37 -04:00
parent 426045cc74
commit 2912f8ab95
1 changed files with 93 additions and 95 deletions
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186
src/css.js
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@ -11,6 +11,7 @@ var rexclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
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,
@ -35,49 +36,7 @@ jQuery.fn.css = function( name, value ) {
};
jQuery.extend({
cssHooks: {
opacity: {
get: function( elem, force ) {
var style = elem.style;
if ( jQuery.support.opacity && !style.filter ) {
return false; // move along, nothing to see here
}
// IE uses filters for opacity
var ret = ropacity.test(elem.currentStyle.filter || "") ?
(parseFloat(RegExp.$1) / 100) + "" :
"";
return ret === "" ?
"1" :
ret;
},
set: function( elem, value ) {
var style = elem.style;
if ( jQuery.support.opacity && !style.filter ) {
return false; // move along, nothing to see here
}
// 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.curCSS( elem, "filter" ) || "";
style.filter = ralpha.test(filter) ?
filter.replace(ralpha, opacity) :
opacity;
}
}
},
cssHooks: {},
style: function( elem, name, value ) {
// don't set styles on text and comment nodes
@ -133,7 +92,7 @@ jQuery.extend({
},
curCSS: function( elem, name, force ) {
var ret, style = elem.style, filter, hooks = jQuery.cssHooks[name] || {};
var ret, style = elem.style || {}, hooks = jQuery.cssHooks[name] || {};
// Make sure we're using the right name for getting the float value
if ( rfloat.test( name ) ) {
@ -144,58 +103,11 @@ jQuery.extend({
return ret;
}
if ( !force && style && style[ name ] ) {
if ( !force && name in style ) {
ret = style[ name ];
} else if ( getComputedStyle ) {
// Only "float" is needed here
if ( rfloat.test( name ) ) {
name = "float";
}
name = name.replace( rupper, "-$1" ).toLowerCase();
var defaultView = elem.ownerDocument.defaultView;
if ( !defaultView ) {
return null;
}
var computedStyle = defaultView.getComputedStyle( elem, null );
if ( computedStyle ) {
ret = computedStyle.getPropertyValue( name );
}
// We should always get a number back from opacity
if ( name === "opacity" && ret === "" ) {
ret = "1";
}
} else if ( elem.currentStyle ) {
var camelCase = name.replace(rdashAlpha, fcamelCase);
ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
// 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
var 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 = camelCase === "fontSize" ? "1em" : (ret || 0);
ret = style.pixelLeft + "px";
// Revert the changed values
style.left = left;
elem.runtimeStyle.left = rsLeft;
}
} else if ( curCSS ) {
ret = curCSS( elem, name );
}
return ret;
@ -220,6 +132,92 @@ jQuery.extend({
}
});
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.curCSS( elem, "filter" ) || "";
style.filter = ralpha.test(filter) ?
filter.replace(ralpha, opacity) :
opacity;
}
};
}
if ( getComputedStyle ) {
curCSS = function( elem, name ) {
var ret, defaultView, computedStyle;
// Only "float" is needed here
if ( rfloat.test( name ) ) {
name = "float";
}
name = name.replace( rupper, "-$1" ).toLowerCase();
if ( !(defaultView = elem.ownerDocument.defaultView) ) {
return null;
}
if ( (computedStyle = defaultView.getComputedStyle( elem, null )) ) {
ret = computedStyle.getPropertyValue( name );
}
// We should always get a number back from opacity
if ( name === "opacity" && ret === "" ) {
ret = "1";
}
return ret;
};
} else if ( document.documentElement.currentStyle ) {
curCSS = function( elem, name ) {
var left, rsLeft, camelCase = name.replace(rdashAlpha, fcamelCase),
ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
// 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 = camelCase === "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;