src/css.js

   1 (function( jQuery ) {
   2
   3 var ralpha = /alpha\([^)]*\)/,
   4         ropacity = /opacity=([^)]*)/,
   5         rdashAlpha = /-([a-z])/ig,
   6         rupper = /([A-Z])/g,
   7         rnumpx = /^-?\d+(?:px)?$/i,
   8         rnum = /^-?\d/,
   9
  10         cssShow = { position: "absolute", visibility: "hidden", display: "block" },
  11         cssWidth = [ "Left", "Right" ],
  12         cssHeight = [ "Top", "Bottom" ],
  13         curCSS,
  14
  15         // cache check for defaultView.getComputedStyle
  16         getComputedStyle = document.defaultView && document.defaultView.getComputedStyle,
  17
  18         fcamelCase = function( all, letter ) {
  19                 return letter.toUpperCase();
  20         };
  21
  22 jQuery.fn.css = function( name, value ) {
  23         return jQuery.access( this, name, value, true, function( elem, name, value ) {
  24                 return value !== undefined ?
  25                         jQuery.style( elem, name, value ) :
  26                         jQuery.css( elem, name );
  27         });
  28 };
  29
  30 jQuery.extend({
  31         // Add in style property hooks for overriding the default
  32         // behavior of getting and setting a style property
  33         cssHooks: {
  34                 opacity: {
  35                         get: function( elem ) {
  36                                 // We should always get a number back from opacity
  37                                 var ret = curCSS( elem, "opacity", "opacity" );
  38                                 return ret === "" ? "1" : ret;
  39                         }
  40                 }
  41         },
  42
  43         // Exclude the following css properties to add px
  44         cssNumber: {
  45                 "zIndex": true,
  46                 "fontWeight": true,
  47                 "opacity": true,
  48                 "zoom": true,
  49                 "lineHeight": true
  50         },
  51
  52         // Add in properties whose names you wish to fix before
  53         // setting or getting the value
  54         cssProps: {
  55                 // normalize float css property
  56                 "float": jQuery.support.cssFloat ? "cssFloat" : "styleFloat"
  57         },
  58
  59         // Get and set the style property on a DOM Node
  60         style: function( elem, name, value, extra ) {
  61                 // Don't set styles on text and comment nodes
  62                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
  63                         return undefined;
  64                 }
  65
  66                 // Make sure that we're working with the right name
  67                 var ret, origName = jQuery.camelCase( name ),
  68                         style = elem.style, hooks = jQuery.cssHooks[ origName ];
  69
  70                 name = jQuery.cssProps[ origName ] || origName;
  71
  72                 // Check if we're setting a value
  73                 if ( value !== undefined ) {
  74                         // If a number was passed in, add 'px' to the (except for certain CSS properties)
  75                         if ( typeof value === "number" && !jQuery.cssNumber[ origName ] ) {
  76                                 value += "px";
  77                         }
  78
  79                         // If a hook was provided, use that value, otherwise just set the specified value
  80                         if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value )) !== undefined ) {
  81                                 style[ name ] = value;
  82                         }
  83
  84                 } else {
  85                         // If a hook was provided get the non-computed value from there
  86                         if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
  87                                 return ret;
  88                         }
  89
  90                         // Otherwise just get the value from the style object
  91                         return style[ name ];
  92                 }
  93         },
  94
  95         css: function( elem, name, extra ) {
  96                 // Make sure that we're working with the right name
  97                 var ret, origName = jQuery.camelCase( name ),
  98                         hooks = jQuery.cssHooks[ origName ];
  99
 100                 name = jQuery.cssProps[ origName ] || origName;
 101
 102                 // If a hook was provided get the computed value from there
 103                 if ( hooks && "get" in hooks && (ret = hooks.get( elem, true, extra )) !== undefined ) {
 104                         return ret;
 105
 106                 // Otherwise, if a way to get the computed value exists, use that
 107                 } else if ( curCSS ) {
 108                         return curCSS( elem, name, origName );
 109                 }
 110         },
 111
 112         // A method for quickly swapping in/out CSS properties to get correct calculations
 113         swap: function( elem, options, callback ) {
 114                 var old = {};
 115
 116                 // Remember the old values, and insert the new ones
 117                 for ( var name in options ) {
 118                         old[ name ] = elem.style[ name ];
 119                         elem.style[ name ] = options[ name ];
 120                 }
 121
 122                 callback.call( elem );
 123
 124                 // Revert the old values
 125                 for ( name in options ) {
 126                         elem.style[ name ] = old[ name ];
 127                 }
 128         },
 129
 130         camelCase: function( string ) {
 131                 return string.replace( rdashAlpha, fcamelCase );
 132         }
 133 });
 134
 135 // DEPRECATED, Use jQuery.css() instead
 136 jQuery.curCSS = jQuery.css;
 137
 138 jQuery.each(["height", "width"], function( i, name ) {
 139         jQuery.cssHooks[ name ] = {
 140                 get: function( elem, computed, extra ) {
 141                         var val;
 142
 143                         if ( computed ) {
 144                                 if ( elem.offsetWidth !== 0 ) {
 145                                         val = getWH( elem, name, extra );
 146
 147                                 } else {
 148                                         jQuery.swap( elem, cssShow, function() {
 149                                                 val = getWH( elem, name, extra );
 150                                         });
 151                                 }
 152
 153                                 return val + "px";
 154                         }
 155                 },
 156
 157                 set: function( elem, value ) {
 158                         if ( value !== "" ) {
 159                                 // ignore negative width and height values #1599
 160                                 value = parseFloat(value);
 161
 162                                 if ( value >= 0 ) {
 163                                         return value + "px";
 164                                 }
 165
 166                         } else {
 167                                 return value;
 168                         }
 169                 }
 170         };
 171 });
 172
 173 if ( !jQuery.support.opacity ) {
 174         jQuery.cssHooks.opacity = {
 175                 get: function( elem, computed ) {
 176                         // IE uses filters for opacity
 177                         return ropacity.test((computed ? elem.currentStyle.filter : elem.style.filter) || "") ?
 178                                 (parseFloat(RegExp.$1) / 100) + "" :
 179                                 "1";
 180                 },
 181
 182                 set: function( elem, value ) {
 183                         var style = elem.style;
 184
 185                         // IE has trouble with opacity if it does not have layout
 186                         // Force it by setting the zoom level
 187                         style.zoom = 1;
 188
 189                         // Set the alpha filter to set the opacity
 190                         var opacity = parseInt( value, 10 ) + "" === "NaN" ?
 191                                 "" :
 192                                 "alpha(opacity=" + value * 100 + ")";
 193
 194                         var filter = style.filter || elem.currentStyle.filter || "";
 195
 196                         style.filter = ralpha.test(filter) ?
 197                                 filter.replace(ralpha, opacity) :
 198                                 opacity;
 199                 }
 200         };
 201 }
 202
 203 if ( getComputedStyle ) {
 204         curCSS = function( elem, newName, name ) {
 205                 var ret, defaultView, computedStyle;
 206
 207                 name = name.replace( rupper, "-$1" ).toLowerCase();
 208
 209                 if ( !(defaultView = elem.ownerDocument.defaultView) ) {
 210                         return undefined;
 211                 }
 212
 213                 if ( (computedStyle = defaultView.getComputedStyle( elem, null )) ) {
 214                         ret = computedStyle.getPropertyValue( name );
 215                 }
 216
 217                 return ret;
 218         };
 219
 220 } else if ( document.documentElement.currentStyle ) {
 221         curCSS = function( elem, name ) {
 222                 var left, rsLeft, ret = elem.currentStyle[ name ], style = elem.style;
 223
 224                 // From the awesome hack by Dean Edwards
 225                 // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 226
 227                 // If we're not dealing with a regular pixel number
 228                 // but a number that has a weird ending, we need to convert it to pixels
 229                 if ( !rnumpx.test( ret ) && rnum.test( ret ) ) {
 230                         // Remember the original values
 231                         left = style.left;
 232                         rsLeft = elem.runtimeStyle.left;
 233
 234                         // Put in the new values to get a computed value out
 235                         elem.runtimeStyle.left = elem.currentStyle.left;
 236                         style.left = name === "fontSize" ? "1em" : (ret || 0);
 237                         ret = style.pixelLeft + "px";
 238
 239                         // Revert the changed values
 240                         style.left = left;
 241                         elem.runtimeStyle.left = rsLeft;
 242                 }
 243
 244                 return ret;
 245         };
 246 }
 247
 248 function getWH( elem, name, extra ) {
 249         var which = name === "width" ? cssWidth : cssHeight,
 250                 val = name === "width" ? elem.offsetWidth : elem.offsetHeight;
 251
 252         if ( extra === "border" ) {
 253                 return val;
 254         }
 255
 256         jQuery.each( which, function() {
 257                 if ( !extra ) {
 258                         val -= parseFloat(jQuery.css( elem, "padding" + this )) || 0;
 259                 }
 260
 261                 if ( extra === "margin" ) {
 262                         val += parseFloat(jQuery.css( elem, "margin" + this )) || 0;
 263
 264                 } else {
 265                         val -= parseFloat(jQuery.css( elem, "border" + this + "Width" )) || 0;
 266                 }
 267         });
 268
 269         return val;
 270 }
 271
 272 if ( jQuery.expr && jQuery.expr.filters ) {
 273         jQuery.expr.filters.hidden = function( elem ) {
 274                 var width = elem.offsetWidth, height = elem.offsetHeight,
 275                         skip = elem.nodeName.toLowerCase() === "tr";
 276
 277                 return width === 0 && height === 0 && !skip ?
 278                         true :
 279                         width > 0 && height > 0 && !skip ?
 280                                 false :
 281                                 (elem.style.display || jQuery.css( elem, "display" )) === "none";
 282         };
 283
 284         jQuery.expr.filters.visible = function( elem ) {
 285                 return !jQuery.expr.filters.hidden( elem );
 286         };
 287 }
 288
 289 })( jQuery );