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