From 2912f8ab9520e042e8b27865617e586e34a05704 Mon Sep 17 00:00:00 2001 From: John Resig Date: Sun, 5 Sep 2010 00:04:37 -0400 Subject: [PATCH] Broke apart some of the browser-specific logic for CSS handling. --- src/css.js | 188 ++++++++++++++++++++++++++--------------------------- 1 file changed, 93 insertions(+), 95 deletions(-) diff --git a/src/css.js b/src/css.js index dab3783f..5d50d32f 100644 --- a/src/css.js +++ b/src/css.js @@ -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 @@ -133,69 +92,22 @@ 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 ) ) { name = styleFloat; } - if ( "get" in hooks && ( ret = hooks.get( elem, force ) ) !== false ) { + if ( "get" in hooks && (ret = hooks.get( elem, force )) !== false ) { 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;