src/attributes.js

   1 var rclass = /[\n\t]/g,
   2         rspace = /\s+/,
   3         rreturn = /\r/g,
   4         rspecialurl = /href|src|style/,
   5         rtype = /(button|input)/i,
   6         rfocusable = /(button|input|object|select|textarea)/i,
   7         rclickable = /^(a|area)$/i,
   8         rradiocheck = /radio|checkbox/;
   9
  10 jQuery.fn.extend({
  11         attr: function( name, value ) {
  12                 return jQuery.access( this, name, value, true, jQuery.attr );
  13         },
  14
  15         removeAttr: function( name, fn ) {
  16                 return this.each(function(){
  17                         jQuery.attr( this, name, "" );
  18                         if ( this.nodeType === 1 ) {
  19                                 this.removeAttribute( name );
  20                         }
  21                 });
  22         },
  23
  24         addClass: function( value ) {
  25                 if ( jQuery.isFunction(value) ) {
  26                         return this.each(function(i) {
  27                                 var self = jQuery(this);
  28                                 self.addClass( value.call(this, i, self.attr("class")) );
  29                         });
  30                 }
  31
  32                 if ( value && typeof value === "string" ) {
  33                         var classNames = (value || "").split( rspace );
  34
  35                         for ( var i = 0, l = this.length; i < l; i++ ) {
  36                                 var elem = this[i];
  37
  38                                 if ( elem.nodeType === 1 ) {
  39                                         if ( !elem.className ) {
  40                                                 elem.className = value;
  41
  42                                         } else {
  43                                                 var className = " " + elem.className + " ", setClass = elem.className;
  44                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  45                                                         if ( className.indexOf( " " + classNames[c] + " " ) < 0 ) {
  46                                                                 setClass += " " + classNames[c];
  47                                                         }
  48                                                 }
  49                                                 elem.className = jQuery.trim( setClass );
  50                                         }
  51                                 }
  52                         }
  53                 }
  54
  55                 return this;
  56         },
  57
  58         removeClass: function( value ) {
  59                 if ( jQuery.isFunction(value) ) {
  60                         return this.each(function(i) {
  61                                 var self = jQuery(this);
  62                                 self.removeClass( value.call(this, i, self.attr("class")) );
  63                         });
  64                 }
  65
  66                 if ( (value && typeof value === "string") || value === undefined ) {
  67                         var classNames = (value || "").split(rspace);
  68
  69                         for ( var i = 0, l = this.length; i < l; i++ ) {
  70                                 var elem = this[i];
  71
  72                                 if ( elem.nodeType === 1 && elem.className ) {
  73                                         if ( value ) {
  74                                                 var className = (" " + elem.className + " ").replace(rclass, " ");
  75                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  76                                                         className = className.replace(" " + classNames[c] + " ", " ");
  77                                                 }
  78                                                 elem.className = jQuery.trim( className );
  79
  80                                         } else {
  81                                                 elem.className = "";
  82                                         }
  83                                 }
  84                         }
  85                 }
  86
  87                 return this;
  88         },
  89
  90         toggleClass: function( value, stateVal ) {
  91                 var type = typeof value, isBool = typeof stateVal === "boolean";
  92
  93                 if ( jQuery.isFunction( value ) ) {
  94                         return this.each(function(i) {
  95                                 var self = jQuery(this);
  96                                 self.toggleClass( value.call(this, i, self.attr("class"), stateVal), stateVal );
  97                         });
  98                 }
  99
 100                 return this.each(function() {
 101                         if ( type === "string" ) {
 102                                 // toggle individual class names
 103                                 var className, i = 0, self = jQuery(this),
 104                                         state = stateVal,
 105                                         classNames = value.split( rspace );
 106
 107                                 while ( (className = classNames[ i++ ]) ) {
 108                                         // check each className given, space seperated list
 109                                         state = isBool ? state : !self.hasClass( className );
 110                                         self[ state ? "addClass" : "removeClass" ]( className );
 111                                 }
 112
 113                         } else if ( type === "undefined" || type === "boolean" ) {
 114                                 if ( this.className ) {
 115                                         // store className if set
 116                                         jQuery.data( this, "__className__", this.className );
 117                                 }
 118
 119                                 // toggle whole className
 120                                 this.className = this.className || value === false ? "" : jQuery.data( this, "__className__" ) || "";
 121                         }
 122                 });
 123         },
 124
 125         hasClass: function( selector ) {
 126                 var className = " " + selector + " ";
 127                 for ( var i = 0, l = this.length; i < l; i++ ) {
 128                         if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 129                                 return true;
 130                         }
 131                 }
 132
 133                 return false;
 134         },
 135
 136         val: function( value ) {
 137                 if ( value === undefined ) {
 138                         var elem = this[0];
 139
 140                         if ( elem ) {
 141                                 if ( jQuery.nodeName( elem, "option" ) ) {
 142                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 143                                 }
 144
 145                                 // We need to handle select boxes special
 146                                 if ( jQuery.nodeName( elem, "select" ) ) {
 147                                         var index = elem.selectedIndex,
 148                                                 values = [],
 149                                                 options = elem.options,
 150                                                 one = elem.type === "select-one";
 151
 152                                         // Nothing was selected
 153                                         if ( index < 0 ) {
 154                                                 return null;
 155                                         }
 156
 157                                         // Loop through all the selected options
 158                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 159                                                 var option = options[ i ];
 160
 161                                                 if ( option.selected ) {
 162                                                         // Get the specifc value for the option
 163                                                         value = jQuery(option).val();
 164
 165                                                         // We don't need an array for one selects
 166                                                         if ( one ) {
 167                                                                 return value;
 168                                                         }
 169
 170                                                         // Multi-Selects return an array
 171                                                         values.push( value );
 172                                                 }
 173                                         }
 174
 175                                         return values;
 176                                 }
 177
 178                                 // Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
 179                                 if ( rradiocheck.test( elem.type ) && !jQuery.support.checkOn ) {
 180                                         return elem.getAttribute("value") === null ? "on" : elem.value;
 181                                 }
 182
 183
 184                                 // Everything else, we just grab the value
 185                                 return (elem.value || "").replace(rreturn, "");
 186
 187                         }
 188
 189                         return undefined;
 190                 }
 191
 192                 var isFunction = jQuery.isFunction(value);
 193
 194                 return this.each(function(i) {
 195                         var self = jQuery(this), val = value;
 196
 197                         if ( this.nodeType !== 1 ) {
 198                                 return;
 199                         }
 200
 201                         if ( isFunction ) {
 202                                 val = value.call(this, i, self.val());
 203                         }
 204
 205                         // Typecast each time if the value is a Function and the appended
 206                         // value is therefore different each time.
 207                         if ( typeof val === "number" ) {
 208                                 val += "";
 209                         }
 210
 211                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 212                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 213
 214                         } else if ( jQuery.nodeName( this, "select" ) ) {
 215                                 var values = jQuery.makeArray(val);
 216
 217                                 jQuery( "option", this ).each(function() {
 218                                         this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
 219                                 });
 220
 221                                 if ( !values.length ) {
 222                                         this.selectedIndex = -1;
 223                                 }
 224
 225                         } else {
 226                                 this.value = val;
 227                         }
 228                 });
 229         }
 230 });
 231
 232 jQuery.extend({
 233         attrFn: {
 234                 val: true,
 235                 css: true,
 236                 html: true,
 237                 text: true,
 238                 data: true,
 239                 width: true,
 240                 height: true,
 241                 offset: true
 242         },
 243
 244         attr: function( elem, name, value, pass ) {
 245                 // don't set attributes on text and comment nodes
 246                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 247                         return undefined;
 248                 }
 249
 250                 if ( pass && name in jQuery.attrFn ) {
 251                         return jQuery(elem)[name](value);
 252                 }
 253
 254                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 255                         // Whether we are setting (or getting)
 256                         set = value !== undefined;
 257
 258                 // Try to normalize/fix the name
 259                 name = notxml && jQuery.props[ name ] || name;
 260
 261                 // Only do all the following if this is a node (faster for style)
 262                 if ( elem.nodeType === 1 ) {
 263                         // These attributes require special treatment
 264                         var special = rspecialurl.test( name );
 265
 266                         // Safari mis-reports the default selected property of an option
 267                         // Accessing the parent's selectedIndex property fixes it
 268                         if ( name === "selected" && !jQuery.support.optSelected ) {
 269                                 var parent = elem.parentNode;
 270                                 if ( parent ) {
 271                                         parent.selectedIndex;
 272
 273                                         // Make sure that it also works with optgroups, see #5701
 274                                         if ( parent.parentNode ) {
 275                                                 parent.parentNode.selectedIndex;
 276                                         }
 277                                 }
 278                         }
 279
 280                         // If applicable, access the attribute via the DOM 0 way
 281                         // 'in' checks fail in Blackberry 4.7 #6931
 282                         if ( (name in elem || elem[ name ] !== undefined) && notxml && !special ) {
 283                                 if ( set ) {
 284                                         // We can't allow the type property to be changed (since it causes problems in IE)
 285                                         if ( name === "type" && rtype.test( elem.nodeName ) && elem.parentNode ) {
 286                                                 jQuery.error( "type property can't be changed" );
 287                                         }
 288
 289                                         elem[ name ] = value;
 290                                 }
 291
 292                                 // browsers index elements by id/name on forms, give priority to attributes.
 293                                 if ( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) ) {
 294                                         return elem.getAttributeNode( name ).nodeValue;
 295                                 }
 296
 297                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 298                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 299                                 if ( name === "tabIndex" ) {
 300                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
 301
 302                                         return attributeNode && attributeNode.specified ?
 303                                                 attributeNode.value :
 304                                                 rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
 305                                                         0 :
 306                                                         undefined;
 307                                 }
 308
 309                                 return elem[ name ];
 310                         }
 311
 312                         if ( !jQuery.support.style && notxml && name === "style" ) {
 313                                 if ( set ) {
 314                                         elem.style.cssText = "" + value;
 315                                 }
 316
 317                                 return elem.style.cssText;
 318                         }
 319
 320                         if ( set ) {
 321                                 // convert the value to a string (all browsers do this but IE) see #1070
 322                                 elem.setAttribute( name, "" + value );
 323                         }
 324
 325                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 326                                         // Some attributes require a special call on IE
 327                                         elem.getAttribute( name, 2 ) :
 328                                         elem.getAttribute( name );
 329
 330                         // Non-existent attributes return null, we normalize to undefined
 331                         return attr === null ? undefined : attr;
 332                 }
 333
 334                 // elem is actually elem.style ... set the style
 335                 // Using attr for specific style information is now deprecated. Use style instead.
 336                 return jQuery.style( elem, name, value );
 337         }
 338 });