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         cssShow = { position: "absolute", visibility: "hidden", display:"block" },
  12         cssWidth = [ "Left", "Right" ],
  13         cssHeight = [ "Top", "Bottom" ],
  14
  15         // cache check for defaultView.getComputedStyle
  16         getComputedStyle = document.defaultView && document.defaultView.getComputedStyle,
  17         // normalize float css property
  18         styleFloat = jQuery.support.cssFloat ? "cssFloat" : "styleFloat",
  19         fcamelCase = function( all, letter ) {
  20                 return letter.toUpperCase();
  21         };
  22
  23 jQuery.fn.css = function( name, value ) {
  24         return access( this, name, value, true, function( elem, name, value ) {
  25                 if ( value === undefined ) {
  26                         return jQuery.curCSS( elem, name );
  27                 }
  28
  29                 if ( typeof value === "number" && !rexclude.test(name) ) {
  30                         value += "px";
  31                 }
  32
  33                 jQuery.style( elem, name, value );
  34         });
  35 };
  36
  37 jQuery.extend({
  38         style: function( elem, name, value ) {
  39                 // don't set styles on text and comment nodes
  40                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
  41                         return undefined;
  42                 }
  43
  44                 // ignore negative width and height values #1599
  45                 if ( (name === "width" || name === "height") && parseFloat(value) < 0 ) {
  46                         value = undefined;
  47                 }
  48
  49                 var style = elem.style || elem, set = value !== undefined;
  50
  51                 // IE uses filters for opacity
  52                 if ( !jQuery.support.opacity && name === "opacity" ) {
  53                         if ( set ) {
  54                                 // IE has trouble with opacity if it does not have layout
  55                                 // Force it by setting the zoom level
  56                                 style.zoom = 1;
  57
  58                                 // Set the alpha filter to set the opacity
  59                                 var opacity = parseInt( value, 10 ) + "" === "NaN" ? "" : "alpha(opacity=" + value * 100 + ")";
  60                                 var filter = style.filter || jQuery.curCSS( elem, "filter" ) || "";
  61                                 style.filter = ralpha.test(filter) ? filter.replace(ralpha, opacity) : opacity;
  62                         }
  63
  64                         return style.filter && style.filter.indexOf("opacity=") >= 0 ?
  65                                 (parseFloat( ropacity.exec(style.filter)[1] ) / 100) + "":
  66                                 "";
  67                 }
  68
  69                 // Make sure we're using the right name for getting the float value
  70                 if ( rfloat.test( name ) ) {
  71                         name = styleFloat;
  72                 }
  73
  74                 name = name.replace(rdashAlpha, fcamelCase);
  75
  76                 if ( set ) {
  77                         style[ name ] = value;
  78                 }
  79
  80                 return style[ name ];
  81         },
  82
  83         css: function( elem, name, force, extra ) {
  84                 if ( name === "width" || name === "height" ) {
  85                         var val, props = cssShow, which = name === "width" ? cssWidth : cssHeight;
  86
  87                         function getWH() {
  88                                 val = name === "width" ? elem.offsetWidth : elem.offsetHeight;
  89
  90                                 if ( extra === "border" ) {
  91                                         return;
  92                                 }
  93
  94                                 jQuery.each( which, function() {
  95                                         if ( !extra ) {
  96                                                 val -= parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
  97                                         }
  98
  99                                         if ( extra === "margin" ) {
 100                                                 val += parseFloat(jQuery.curCSS( elem, "margin" + this, true)) || 0;
 101                                         } else {
 102                                                 val -= parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 103                                         }
 104                                 });
 105                         }
 106
 107                         if ( elem.offsetWidth !== 0 ) {
 108                                 getWH();
 109                         } else {
 110                                 jQuery.swap( elem, props, getWH );
 111                         }
 112
 113                         return Math.max(0, Math.round(val));
 114                 }
 115
 116                 return jQuery.curCSS( elem, name, force );
 117         },
 118
 119         curCSS: function( elem, name, force ) {
 120                 var ret, style = elem.style, filter;
 121
 122                 // IE uses filters for opacity
 123                 if ( !jQuery.support.opacity && name === "opacity" && elem.currentStyle ) {
 124                         ret = ropacity.test(elem.currentStyle.filter || "") ?
 125                                 (parseFloat(RegExp.$1) / 100) + "" :
 126                                 "";
 127
 128                         return ret === "" ?
 129                                 "1" :
 130                                 ret;
 131                 }
 132
 133                 // Make sure we're using the right name for getting the float value
 134                 if ( rfloat.test( name ) ) {
 135                         name = styleFloat;
 136                 }
 137
 138                 if ( !force && style && style[ name ] ) {
 139                         ret = style[ name ];
 140
 141                 } else if ( getComputedStyle ) {
 142
 143                         // Only "float" is needed here
 144                         if ( rfloat.test( name ) ) {
 145                                 name = "float";
 146                         }
 147
 148                         name = name.replace( rupper, "-$1" ).toLowerCase();
 149
 150                         var defaultView = elem.ownerDocument.defaultView;
 151
 152                         if ( !defaultView ) {
 153                                 return null;
 154                         }
 155
 156                         var computedStyle = defaultView.getComputedStyle( elem, null );
 157
 158                         if ( computedStyle ) {
 159                                 ret = computedStyle.getPropertyValue( name );
 160                         }
 161
 162                         // We should always get a number back from opacity
 163                         if ( name === "opacity" && ret === "" ) {
 164                                 ret = "1";
 165                         }
 166
 167                 } else if ( elem.currentStyle ) {
 168                         var camelCase = name.replace(rdashAlpha, fcamelCase);
 169
 170                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 171
 172                         // From the awesome hack by Dean Edwards
 173                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 174
 175                         // If we're not dealing with a regular pixel number
 176                         // but a number that has a weird ending, we need to convert it to pixels
 177                         if ( !rnumpx.test( ret ) && rnum.test( ret ) ) {
 178                                 // Remember the original values
 179                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 180
 181                                 // Put in the new values to get a computed value out
 182                                 elem.runtimeStyle.left = elem.currentStyle.left;
 183                                 style.left = camelCase === "fontSize" ? "1em" : (ret || 0);
 184                                 ret = style.pixelLeft + "px";
 185
 186                                 // Revert the changed values
 187                                 style.left = left;
 188                                 elem.runtimeStyle.left = rsLeft;
 189                         }
 190                 }
 191
 192                 return ret;
 193         },
 194
 195         // A method for quickly swapping in/out CSS properties to get correct calculations
 196         swap: function( elem, options, callback ) {
 197                 var old = {};
 198
 199                 // Remember the old values, and insert the new ones
 200                 for ( var name in options ) {
 201                         old[ name ] = elem.style[ name ];
 202                         elem.style[ name ] = options[ name ];
 203                 }
 204
 205                 callback.call( elem );
 206
 207                 // Revert the old values
 208                 for ( var name in options ) {
 209                         elem.style[ name ] = old[ name ];
 210                 }
 211         }
 212 });
 213
 214 if ( jQuery.expr && jQuery.expr.filters ) {
 215         jQuery.expr.filters.hidden = function( elem ) {
 216                 var width = elem.offsetWidth, height = elem.offsetHeight,
 217                         skip = elem.nodeName.toLowerCase() === "tr";
 218
 219                 return width === 0 && height === 0 && !skip ?
 220                         true :
 221                         width > 0 && height > 0 && !skip ?
 222                                 false :
 223                                 jQuery.curCSS(elem, "display") === "none";
 224         };
 225
 226         jQuery.expr.filters.visible = function( elem ) {
 227                 return !jQuery.expr.filters.hidden( elem );
 228         };
 229 }