src/css.js

   1 (function( jQuery ) {
   2
   3 var ralpha = /alpha\([^)]*\)/i,
   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         // Setting 'undefined' is a no-op
  24         if ( arguments.length === 2 && value === undefined ) {
  25                 return this;
  26         }
  27
  28         return jQuery.access( this, name, value, true, function( elem, name, value ) {
  29                 return value !== undefined ?
  30                         jQuery.style( elem, name, value ) :
  31                         jQuery.css( elem, name );
  32         });
  33 };
  34
  35 jQuery.extend({
  36         // Add in style property hooks for overriding the default
  37         // behavior of getting and setting a style property
  38         cssHooks: {
  39                 opacity: {
  40                         get: function( elem, computed ) {
  41                                 if ( computed ) {
  42                                         // We should always get a number back from opacity
  43                                         var ret = curCSS( elem, "opacity", "opacity" );
  44                                         return ret === "" ? "1" : ret;
  45
  46                                 } else {
  47                                         return elem.style.opacity;
  48                                 }
  49                         }
  50                 }
  51         },
  52
  53         // Exclude the following css properties to add px
  54         cssNumber: {
  55                 "zIndex": true,
  56                 "fontWeight": true,
  57                 "opacity": true,
  58                 "zoom": true,
  59                 "lineHeight": true
  60         },
  61
  62         // Add in properties whose names you wish to fix before
  63         // setting or getting the value
  64         cssProps: {
  65                 // normalize float css property
  66                 "float": jQuery.support.cssFloat ? "cssFloat" : "styleFloat"
  67         },
  68
  69         // Get and set the style property on a DOM Node
  70         style: function( elem, name, value, extra ) {
  71                 // Don't set styles on text and comment nodes
  72                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
  73                         return undefined;
  74                 }
  75
  76                 // Make sure that we're working with the right name
  77                 var ret, origName = jQuery.camelCase( name ),
  78                         style = elem.style, hooks = jQuery.cssHooks[ origName ];
  79
  80                 name = jQuery.cssProps[ origName ] || origName;
  81
  82                 // Check if we're setting a value
  83                 if ( value !== undefined ) {
  84                         // If a number was passed in, add 'px' to the (except for certain CSS properties)
  85                         if ( typeof value === "number" && !jQuery.cssNumber[ origName ] ) {
  86                                 value += "px";
  87                         }
  88
  89                         // If a hook was provided, use that value, otherwise just set the specified value
  90                         if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value )) !== undefined ) {
  91                                 style[ name ] = value;
  92                         }
  93
  94                 } else {
  95                         // If a hook was provided get the non-computed value from there
  96                         if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
  97                                 return ret;
  98                         }
  99
 100                         // Otherwise just get the value from the style object
 101                         return style[ name ];
 102                 }
 103         },
 104
 105         css: function( elem, name, extra ) {
 106                 // Make sure that we're working with the right name
 107                 var ret, origName = jQuery.camelCase( name ),
 108                         hooks = jQuery.cssHooks[ origName ];
 109
 110                 name = jQuery.cssProps[ origName ] || origName;
 111
 112                 // If a hook was provided get the computed value from there
 113                 if ( hooks && "get" in hooks && (ret = hooks.get( elem, true, extra )) !== undefined ) {
 114                         return ret;
 115
 116                 // Otherwise, if a way to get the computed value exists, use that
 117                 } else if ( curCSS ) {
 118                         return curCSS( elem, name, origName );
 119                 }
 120         },
 121
 122         // A method for quickly swapping in/out CSS properties to get correct calculations
 123         swap: function( elem, options, callback ) {
 124                 var old = {};
 125
 126                 // Remember the old values, and insert the new ones
 127                 for ( var name in options ) {
 128                         old[ name ] = elem.style[ name ];
 129                         elem.style[ name ] = options[ name ];
 130                 }
 131
 132                 callback.call( elem );
 133
 134                 // Revert the old values
 135                 for ( name in options ) {
 136                         elem.style[ name ] = old[ name ];
 137                 }
 138         },
 139
 140         camelCase: function( string ) {
 141                 return string.replace( rdashAlpha, fcamelCase );
 142         }
 143 });
 144
 145 // DEPRECATED, Use jQuery.css() instead
 146 jQuery.curCSS = jQuery.css;
 147
 148 jQuery.each(["height", "width"], function( i, name ) {
 149         jQuery.cssHooks[ name ] = {
 150                 get: function( elem, computed, extra ) {
 151                         var val;
 152
 153                         if ( computed ) {
 154                                 if ( elem.offsetWidth !== 0 ) {
 155                                         val = getWH( elem, name, extra );
 156
 157                                 } else {
 158                                         jQuery.swap( elem, cssShow, function() {
 159                                                 val = getWH( elem, name, extra );
 160                                         });
 161                                 }
 162
 163                                 return val + "px";
 164                         }
 165                 },
 166
 167                 set: function( elem, value ) {
 168                         if ( rnumpx.test( value ) ) {
 169                                 // ignore negative width and height values #1599
 170                                 value = parseFloat(value);
 171
 172                                 if ( value >= 0 ) {
 173                                         return value + "px";
 174                                 }
 175
 176                         } else {
 177                                 return value;
 178                         }
 179                 }
 180         };
 181 });
 182
 183 if ( !jQuery.support.opacity ) {
 184         jQuery.cssHooks.opacity = {
 185                 get: function( elem, computed ) {
 186                         // IE uses filters for opacity
 187                         return ropacity.test((computed && elem.currentStyle ? elem.currentStyle.filter : elem.style.filter) || "") ?
 188                                 (parseFloat(RegExp.$1) / 100) + "" :
 189                                 computed ? "1" : "";
 190                 },
 191
 192                 set: function( elem, value ) {
 193                         var style = elem.style;
 194
 195                         // IE has trouble with opacity if it does not have layout
 196                         // Force it by setting the zoom level
 197                         style.zoom = 1;
 198
 199                         // Set the alpha filter to set the opacity
 200                         var opacity = jQuery.isNaN(value) ?
 201                                 "" :
 202                                 "alpha(opacity=" + value * 100 + ")",
 203                                 filter = style.filter || "";
 204
 205                         style.filter = ralpha.test(filter) ?
 206                                 filter.replace(ralpha, opacity) :
 207                                 opacity;
 208                 }
 209         };
 210 }
 211
 212 if ( getComputedStyle ) {
 213         curCSS = function( elem, newName, name ) {
 214                 var ret, defaultView, computedStyle;
 215
 216                 name = name.replace( rupper, "-$1" ).toLowerCase();
 217
 218                 if ( !(defaultView = elem.ownerDocument.defaultView) ) {
 219                         return undefined;
 220                 }
 221
 222                 if ( (computedStyle = defaultView.getComputedStyle( elem, null )) ) {
 223                         ret = computedStyle.getPropertyValue( name );
 224                 }
 225
 226                 return ret;
 227         };
 228
 229 } else if ( document.documentElement.currentStyle ) {
 230         curCSS = function( elem, name ) {
 231                 var left, rsLeft, ret = elem.currentStyle && elem.currentStyle[ name ], style = elem.style;
 232
 233                 // From the awesome hack by Dean Edwards
 234                 // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 235
 236                 // If we're not dealing with a regular pixel number
 237                 // but a number that has a weird ending, we need to convert it to pixels
 238                 if ( !rnumpx.test( ret ) && rnum.test( ret ) ) {
 239                         // Remember the original values
 240                         left = style.left;
 241                         rsLeft = elem.runtimeStyle.left;
 242
 243                         // Put in the new values to get a computed value out
 244                         elem.runtimeStyle.left = elem.currentStyle.left;
 245                         style.left = name === "fontSize" ? "1em" : (ret || 0);
 246                         ret = style.pixelLeft + "px";
 247
 248                         // Revert the changed values
 249                         style.left = left;
 250                         elem.runtimeStyle.left = rsLeft;
 251                 }
 252
 253                 return ret;
 254         };
 255 }
 256
 257 function getWH( elem, name, extra ) {
 258         var which = name === "width" ? cssWidth : cssHeight,
 259                 val = name === "width" ? elem.offsetWidth : elem.offsetHeight;
 260
 261         if ( extra === "border" ) {
 262                 return val;
 263         }
 264
 265         jQuery.each( which, function() {
 266                 if ( !extra ) {
 267                         val -= parseFloat(jQuery.css( elem, "padding" + this )) || 0;
 268                 }
 269
 270                 if ( extra === "margin" ) {
 271                         val += parseFloat(jQuery.css( elem, "margin" + this )) || 0;
 272
 273                 } else {
 274                         val -= parseFloat(jQuery.css( elem, "border" + this + "Width" )) || 0;
 275                 }
 276         });
 277
 278         return val;
 279 }
 280
 281 if ( jQuery.expr && jQuery.expr.filters ) {
 282         jQuery.expr.filters.hidden = function( elem ) {
 283                 var width = elem.offsetWidth, height = elem.offsetHeight,
 284                         skip = elem.nodeName.toLowerCase() === "tr";
 285
 286                 return width === 0 && height === 0 && !skip ?
 287                         true :
 288                         width > 0 && height > 0 && !skip ?
 289                                 false :
 290                                 (elem.style.display || jQuery.css( elem, "display" )) === "none";
 291         };
 292
 293         jQuery.expr.filters.visible = function( elem ) {
 294                 return !jQuery.expr.filters.hidden( elem );
 295         };
 296 }
 297
 298 })( jQuery );