src/css.js

   1 // exclude the following css properties to add px
   2 var rexclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
   3         ralpha = /alpha\([^)]*\)/,
   4         ropacity = /opacity=([^)]*)/,
   5         rfloat = /float/i,
   6         rdashAlpha = /-([a-z])/ig,
   7         rupper = /([A-Z])/g,
   8         rnumpx = /^\d+(?:px)?$/i,
   9         rnum = /^\d/,
  10
  11         // cache check for defaultView.getComputedStyle
  12         getComputedStyle = document.defaultView && document.defaultView.getComputedStyle,
  13         // normalize float css property
  14         styleFloat = jQuery.support.cssFloat ? "cssFloat" : "styleFloat",
  15         fcamelCase = function(all, letter){
  16                 return letter.toUpperCase();
  17         };
  18
  19 jQuery.fn.css = function( name, value ) {
  20         return access( this, name, value, true, function( elem, name, value ) {
  21                 if (value === undefined) {
  22                         return jQuery.css( elem, name );
  23                 }
  24
  25                 if ( typeof value === "number" && !rexclude.test(name) ) {
  26                         value += "px";
  27                 }
  28
  29                 jQuery.style( elem, name, value );
  30         });
  31 };
  32
  33 jQuery.extend({
  34         style: function( elem, name, value ) {
  35                 // don't set styles on text and comment nodes
  36                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
  37                         return undefined;
  38                 }
  39
  40                 // ignore negative width and height values #1599
  41                 if ( (name === "width" || name === "height") && parseFloat(value) < 0 ) {
  42                         value = undefined;
  43                 }
  44
  45                 var style = elem.style || elem, set = value !== undefined;
  46
  47                 // IE uses filters for opacity
  48                 if ( !jQuery.support.opacity && name === "opacity" ) {
  49                         if ( set ) {
  50                                 // IE has trouble with opacity if it does not have layout
  51                                 // Force it by setting the zoom level
  52                                 style.zoom = 1;
  53
  54                                 // Set the alpha filter to set the opacity
  55                                 style.filter = (style.filter || "").replace( ralpha, "" ) +
  56                                         (parseInt( value ) + '' === "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
  57                         }
  58
  59                         return style.filter && style.filter.indexOf("opacity=") >= 0 ?
  60                                 (parseFloat( ropacity.exec(style.filter)[1] ) / 100) + '':
  61                                 "";
  62                 }
  63
  64                 // Make sure we're using the right name for getting the float value
  65                 if ( rfloat.test( name ) ) {
  66                         name = styleFloat;
  67                 }
  68
  69                 name = name.replace(rdashAlpha, fcamelCase);
  70
  71                 if ( set ) {
  72                         style[ name ] = value;
  73                 }
  74
  75                 return style[ name ];
  76         },
  77
  78         css: function( elem, name, force, extra ) {
  79                 if ( name === "width" || name === "height" ) {
  80                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name === "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
  81
  82                         function getWH() {
  83                                 val = name === "width" ? elem.offsetWidth : elem.offsetHeight;
  84
  85                                 if ( extra === "border" ) { return; }
  86
  87                                 jQuery.each( which, function() {
  88                                         if ( !extra ) {
  89                                                 val -= parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
  90                                         }
  91
  92                                         if ( extra === "margin" ) {
  93                                                 val += parseFloat(jQuery.curCSS( elem, "margin" + this, true)) || 0;
  94                                         } else {
  95                                                 val -= parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
  96                                         }
  97                                 });
  98                         }
  99
 100                         if ( elem.offsetWidth !== 0 ) {
 101                                 getWH();
 102                         } else {
 103                                 jQuery.swap( elem, props, getWH );
 104                         }
 105
 106                         return Math.max(0, Math.round(val));
 107                 }
 108
 109                 return jQuery.curCSS( elem, name, force );
 110         },
 111
 112         curCSS: function( elem, name, force ) {
 113                 var ret, style = elem.style, filter;
 114
 115                 // IE uses filters for opacity
 116                 if ( !jQuery.support.opacity && name === "opacity" && elem.currentStyle ) {
 117                         ret = ropacity.test(elem.currentStyle.filter || "") ?
 118                                 (parseFloat(RegExp.$1) / 100) + "" :
 119                                 "";
 120
 121                         return ret === "" ?
 122                                 "1" :
 123                                 ret;
 124                 }
 125
 126                 // Make sure we're using the right name for getting the float value
 127                 if ( rfloat.test( name ) ) {
 128                         name = styleFloat;
 129                 }
 130
 131                 if ( !force && style && style[ name ] ) {
 132                         ret = style[ name ];
 133
 134                 } else if ( getComputedStyle ) {
 135
 136                         // Only "float" is needed here
 137                         if ( rfloat.test( name ) ) {
 138                                 name = "float";
 139                         }
 140
 141                         name = name.replace( rupper, "-$1" ).toLowerCase();
 142
 143                         var computedStyle = elem.ownerDocument.defaultView.getComputedStyle( elem, null );
 144
 145                         if ( computedStyle ) {
 146                                 ret = computedStyle.getPropertyValue( name );
 147                         }
 148
 149                         // We should always get a number back from opacity
 150                         if ( name === "opacity" && ret === "" ) {
 151                                 ret = "1";
 152                         }
 153
 154                 } else if ( elem.currentStyle ) {
 155                         var camelCase = name.replace(rdashAlpha, fcamelCase);
 156
 157                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 158
 159                         // From the awesome hack by Dean Edwards
 160                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 161
 162                         // If we're not dealing with a regular pixel number
 163                         // but a number that has a weird ending, we need to convert it to pixels
 164                         if ( !rnumpx.test( ret ) && rnum.test( ret ) ) {
 165                                 // Remember the original values
 166                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 167
 168                                 // Put in the new values to get a computed value out
 169                                 elem.runtimeStyle.left = elem.currentStyle.left;
 170                                 style.left = camelCase === "fontSize" ? "1em" : (ret || 0);
 171                                 ret = style.pixelLeft + "px";
 172
 173                                 // Revert the changed values
 174                                 style.left = left;
 175                                 elem.runtimeStyle.left = rsLeft;
 176                         }
 177                 }
 178
 179                 return ret;
 180         },
 181
 182         // A method for quickly swapping in/out CSS properties to get correct calculations
 183         swap: function( elem, options, callback ) {
 184                 var old = {};
 185
 186                 // Remember the old values, and insert the new ones
 187                 for ( var name in options ) {
 188                         old[ name ] = elem.style[ name ];
 189                         elem.style[ name ] = options[ name ];
 190                 }
 191
 192                 callback.call( elem );
 193
 194                 // Revert the old values
 195                 for ( var name in options ) {
 196                         elem.style[ name ] = old[ name ];
 197                 }
 198         }
 199 });
 200
 201 if ( jQuery.expr && jQuery.expr.filters ) {
 202         jQuery.expr.filters.hidden = function(elem){
 203                 var width = elem.offsetWidth, height = elem.offsetHeight,
 204                          force = /^tr$/i.test( elem.nodeName ); // ticket #4512
 205                 return ( width === 0 && height === 0 && !force ) ?
 206                         true :
 207                                 ( width !== 0 && height !== 0 && !force ) ?
 208                                         false :
 209                                                 !!( jQuery.curCSS(elem, "display") === "none" );
 210         };
 211
 212         jQuery.expr.filters.visible = function(elem){
 213                 return !jQuery.expr.filters.hidden(elem);
 214         };
 215 }