src/attributes.js

   1 (function( jQuery ) {
   2
   3 var rclass = /[\n\t]/g,
   4         rspaces = /\s+/,
   5         rreturn = /\r/g,
   6         rspecialurl = /^(?:href|src|style)$/,
   7         rtype = /^(?:button|input)$/i,
   8         rfocusable = /^(?:button|input|object|select|textarea)$/i,
   9         rclickable = /^a(?:rea)?$/i,
  10         rradiocheck = /^(?:radio|checkbox)$/i;
  11
  12 jQuery.fn.extend({
  13         attr: function( name, value ) {
  14                 return jQuery.access( this, name, value, true, jQuery.attr );
  15         },
  16
  17         removeAttr: function( name, fn ) {
  18                 return this.each(function(){
  19                         jQuery.attr( this, name, "" );
  20                         if ( this.nodeType === 1 ) {
  21                                 this.removeAttribute( name );
  22                         }
  23                 });
  24         },
  25
  26         addClass: function( value ) {
  27                 if ( jQuery.isFunction(value) ) {
  28                         return this.each(function(i) {
  29                                 var self = jQuery(this);
  30                                 self.addClass( value.call(this, i, self.attr("class")) );
  31                         });
  32                 }
  33
  34                 if ( value && typeof value === "string" ) {
  35                         var classNames = (value || "").split( rspaces );
  36
  37                         for ( var i = 0, l = this.length; i < l; i++ ) {
  38                                 var elem = this[i];
  39
  40                                 if ( elem.nodeType === 1 ) {
  41                                         if ( !elem.className ) {
  42                                                 elem.className = value;
  43
  44                                         } else {
  45                                                 var className = " " + elem.className + " ", setClass = elem.className;
  46                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  47                                                         if ( className.indexOf( " " + classNames[c] + " " ) < 0 ) {
  48                                                                 setClass += " " + classNames[c];
  49                                                         }
  50                                                 }
  51                                                 elem.className = jQuery.trim( setClass );
  52                                         }
  53                                 }
  54                         }
  55                 }
  56
  57                 return this;
  58         },
  59
  60         removeClass: function( value ) {
  61                 if ( jQuery.isFunction(value) ) {
  62                         return this.each(function(i) {
  63                                 var self = jQuery(this);
  64                                 self.removeClass( value.call(this, i, self.attr("class")) );
  65                         });
  66                 }
  67
  68                 if ( (value && typeof value === "string") || value === undefined ) {
  69                         var classNames = (value || "").split( rspaces );
  70
  71                         for ( var i = 0, l = this.length; i < l; i++ ) {
  72                                 var elem = this[i];
  73
  74                                 if ( elem.nodeType === 1 && elem.className ) {
  75                                         if ( value ) {
  76                                                 var className = (" " + elem.className + " ").replace(rclass, " ");
  77                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  78                                                         className = className.replace(" " + classNames[c] + " ", " ");
  79                                                 }
  80                                                 elem.className = jQuery.trim( className );
  81
  82                                         } else {
  83                                                 elem.className = "";
  84                                         }
  85                                 }
  86                         }
  87                 }
  88
  89                 return this;
  90         },
  91
  92         toggleClass: function( value, stateVal ) {
  93                 var type = typeof value, isBool = typeof stateVal === "boolean";
  94
  95                 if ( jQuery.isFunction( value ) ) {
  96                         return this.each(function(i) {
  97                                 var self = jQuery(this);
  98                                 self.toggleClass( value.call(this, i, self.attr("class"), stateVal), stateVal );
  99                         });
 100                 }
 101
 102                 return this.each(function() {
 103                         if ( type === "string" ) {
 104                                 // toggle individual class names
 105                                 var className, i = 0, self = jQuery(this),
 106                                         state = stateVal,
 107                                         classNames = value.split( rspaces );
 108
 109                                 while ( (className = classNames[ i++ ]) ) {
 110                                         // check each className given, space seperated list
 111                                         state = isBool ? state : !self.hasClass( className );
 112                                         self[ state ? "addClass" : "removeClass" ]( className );
 113                                 }
 114
 115                         } else if ( type === "undefined" || type === "boolean" ) {
 116                                 if ( this.className ) {
 117                                         // store className if set
 118                                         jQuery.data( this, "__className__", this.className );
 119                                 }
 120
 121                                 // toggle whole className
 122                                 this.className = this.className || value === false ? "" : jQuery.data( this, "__className__" ) || "";
 123                         }
 124                 });
 125         },
 126
 127         hasClass: function( selector ) {
 128                 var className = " " + selector + " ";
 129                 for ( var i = 0, l = this.length; i < l; i++ ) {
 130                         if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 131                                 return true;
 132                         }
 133                 }
 134
 135                 return false;
 136         },
 137
 138         val: function( value ) {
 139                 if ( !arguments.length ) {
 140                         var elem = this[0];
 141
 142                         if ( elem ) {
 143                                 if ( jQuery.nodeName( elem, "option" ) ) {
 144                                         // attributes.value is undefined in Blackberry 4.7 but
 145                                         // uses .value. See #6932
 146                                         var val = elem.attributes.value;
 147                                         return !val || val.specified ? elem.value : elem.text;
 148                                 }
 149
 150                                 // We need to handle select boxes special
 151                                 if ( jQuery.nodeName( elem, "select" ) ) {
 152                                         var index = elem.selectedIndex,
 153                                                 values = [],
 154                                                 options = elem.options,
 155                                                 one = elem.type === "select-one";
 156
 157                                         // Nothing was selected
 158                                         if ( index < 0 ) {
 159                                                 return null;
 160                                         }
 161
 162                                         // Loop through all the selected options
 163                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 164                                                 var option = options[ i ];
 165
 166                                                 // Don't return options that are disabled or in a disabled optgroup
 167                                                 if ( option.selected && (jQuery.support.optDisabled ? !option.disabled : option.getAttribute("disabled") === null ) &&
 168                                                                 (!option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" )) ) {
 169
 170                                                         // Get the specific value for the option
 171                                                         value = jQuery(option).val();
 172
 173                                                         // We don't need an array for one selects
 174                                                         if ( one ) {
 175                                                                 return value;
 176                                                         }
 177
 178                                                         // Multi-Selects return an array
 179                                                         values.push( value );
 180                                                 }
 181                                         }
 182
 183                                         return values;
 184                                 }
 185
 186                                 // Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
 187                                 if ( rradiocheck.test( elem.type ) && !jQuery.support.checkOn ) {
 188                                         return elem.getAttribute("value") === null ? "on" : elem.value;
 189                                 }
 190
 191
 192                                 // Everything else, we just grab the value
 193                                 return (elem.value || "").replace(rreturn, "");
 194
 195                         }
 196
 197                         return undefined;
 198                 }
 199
 200                 var isFunction = jQuery.isFunction(value);
 201
 202                 return this.each(function(i) {
 203                         var self = jQuery(this), val = value;
 204
 205                         if ( this.nodeType !== 1 ) {
 206                                 return;
 207                         }
 208
 209                         if ( isFunction ) {
 210                                 val = value.call(this, i, self.val());
 211                         }
 212
 213                         // Treat null/undefined as ""; convert numbers to string
 214                         if ( val == null ) {
 215                                 val = "";
 216                         } else if ( typeof val === "number" ) {
 217                                 val += "";
 218                         }
 219
 220                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 221                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 222
 223                         } else if ( jQuery.nodeName( this, "select" ) ) {
 224                                 var values = jQuery.makeArray(val);
 225
 226                                 jQuery( "option", this ).each(function() {
 227                                         this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
 228                                 });
 229
 230                                 if ( !values.length ) {
 231                                         this.selectedIndex = -1;
 232                                 }
 233
 234                         } else {
 235                                 this.value = val;
 236                         }
 237                 });
 238         }
 239 });
 240
 241 jQuery.extend({
 242         attrFn: {
 243                 val: true,
 244                 css: true,
 245                 html: true,
 246                 text: true,
 247                 data: true,
 248                 width: true,
 249                 height: true,
 250                 offset: true
 251         },
 252
 253         attr: function( elem, name, value, pass ) {
 254                 // don't set attributes on text and comment nodes
 255                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 256                         return undefined;
 257                 }
 258
 259                 if ( pass && name in jQuery.attrFn ) {
 260                         return jQuery(elem)[name](value);
 261                 }
 262
 263                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 264                         // Whether we are setting (or getting)
 265                         set = value !== undefined;
 266
 267                 // Try to normalize/fix the name
 268                 name = notxml && jQuery.props[ name ] || name;
 269
 270                 // Only do all the following if this is a node (faster for style)
 271                 if ( elem.nodeType === 1 ) {
 272                         // These attributes require special treatment
 273                         var special = rspecialurl.test( name );
 274
 275                         // Safari mis-reports the default selected property of an option
 276                         // Accessing the parent's selectedIndex property fixes it
 277                         if ( name === "selected" && !jQuery.support.optSelected ) {
 278                                 var parent = elem.parentNode;
 279                                 if ( parent ) {
 280                                         parent.selectedIndex;
 281
 282                                         // Make sure that it also works with optgroups, see #5701
 283                                         if ( parent.parentNode ) {
 284                                                 parent.parentNode.selectedIndex;
 285                                         }
 286                                 }
 287                         }
 288
 289                         // If applicable, access the attribute via the DOM 0 way
 290                         // 'in' checks fail in Blackberry 4.7 #6931
 291                         if ( (name in elem || elem[ name ] !== undefined) && notxml && !special ) {
 292                                 if ( set ) {
 293                                         // We can't allow the type property to be changed (since it causes problems in IE)
 294                                         if ( name === "type" && rtype.test( elem.nodeName ) && elem.parentNode ) {
 295                                                 jQuery.error( "type property can't be changed" );
 296                                         }
 297
 298                                         elem[ name ] = value;
 299                                 }
 300
 301                                 // browsers index elements by id/name on forms, give priority to attributes.
 302                                 if ( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) ) {
 303                                         return elem.getAttributeNode( name ).nodeValue;
 304                                 }
 305
 306                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 307                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 308                                 if ( name === "tabIndex" ) {
 309                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
 310
 311                                         return attributeNode && attributeNode.specified ?
 312                                                 attributeNode.value :
 313                                                 rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
 314                                                         0 :
 315                                                         undefined;
 316                                 }
 317
 318                                 return elem[ name ];
 319                         }
 320
 321                         if ( !jQuery.support.style && notxml && name === "style" ) {
 322                                 if ( set ) {
 323                                         elem.style.cssText = "" + value;
 324                                 }
 325
 326                                 return elem.style.cssText;
 327                         }
 328
 329                         if ( set ) {
 330                                 // convert the value to a string (all browsers do this but IE) see #1070
 331                                 elem.setAttribute( name, "" + value );
 332                         }
 333
 334                         // Ensure that missing attributes return undefined
 335                         // Blackberry 4.7 returns "" from getAttribute #6938
 336                         if ( !elem.attributes[ name ] && (elem.hasAttribute && !elem.hasAttribute( name )) ) {
 337                                 return undefined;
 338                         }
 339
 340                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 341                                         // Some attributes require a special call on IE
 342                                         elem.getAttribute( name, 2 ) :
 343                                         elem.getAttribute( name );
 344
 345                         // Non-existent attributes return null, we normalize to undefined
 346                         return attr === null ? undefined : attr;
 347                 }
 348         }
 349 });
 350
 351 })( jQuery );