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 ) {
  16                 if ( jQuery.isFunction( name ) ) {
  17                         return this.each(function(i) {
  18                                 var self = jQuery(this);
  19                                 self.removeAttr( name.call(this, i, self.attr(name)) );
  20                         });
  21                 }
  22
  23                 return this.each(function(){
  24                         jQuery.attr( this, name, "" );
  25                         if ( this.nodeType === 1 ) {
  26                                 this.removeAttribute( name );
  27                         }
  28                 });
  29         },
  30
  31         addClass: function( value ) {
  32                 if ( jQuery.isFunction(value) ) {
  33                         return this.each(function(i) {
  34                                 var self = jQuery(this);
  35                                 self.addClass( value.call(this, i, self.attr("class")) );
  36                         });
  37                 }
  38
  39                 if ( value && typeof value === "string" ) {
  40                         var classNames = (value || "").split( rspace );
  41
  42                         for ( var i = 0, l = this.length; i < l; i++ ) {
  43                                 var elem = this[i];
  44
  45                                 if ( elem.nodeType === 1 ) {
  46                                         if ( !elem.className ) {
  47                                                 elem.className = value;
  48
  49                                         } else {
  50                                                 var className = " " + elem.className + " ";
  51                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  52                                                         if ( className.indexOf( " " + classNames[c] + " " ) < 0 ) {
  53                                                                 elem.className += " " + classNames[c];
  54                                                         }
  55                                                 }
  56                                         }
  57                                 }
  58                         }
  59                 }
  60
  61                 return this;
  62         },
  63
  64         removeClass: function( value ) {
  65                 if ( jQuery.isFunction(value) ) {
  66                         return this.each(function(i) {
  67                                 var self = jQuery(this);
  68                                 self.removeClass( value.call(this, i, self.attr("class")) );
  69                         });
  70                 }
  71
  72                 if ( (value && typeof value === "string") || value === undefined ) {
  73                         var classNames = (value || "").split(rspace);
  74
  75                         for ( var i = 0, l = this.length; i < l; i++ ) {
  76                                 var elem = this[i];
  77
  78                                 if ( elem.nodeType === 1 && elem.className ) {
  79                                         if ( value ) {
  80                                                 var className = (" " + elem.className + " ").replace(rclass, " ");
  81                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  82                                                         className = className.replace(" " + classNames[c] + " ", " ");
  83                                                 }
  84                                                 elem.className = className.substring(1, className.length - 1);
  85
  86                                         } else {
  87                                                 elem.className = "";
  88                                         }
  89                                 }
  90                         }
  91                 }
  92
  93                 return this;
  94         },
  95
  96         toggleClass: function( classNames, state ) {
  97                 var type = typeof classNames;
  98
  99                 if ( jQuery.isFunction( classNames ) ) {
 100                         return this.each(function(i) {
 101                                 var self = jQuery(this);
 102                                 self.toggleClass( classNames.call(this, i, self.attr("class")), state );
 103                         });
 104                 }
 105
 106                 return this.each(function(){
 107                         if ( type === "string" ) {
 108                                 // toggle individual class names
 109                                 var isBool = typeof state === "boolean", className, i = 0,
 110                                         classNames = classNames.split( rspace );
 111
 112                                 while ( (className = classNames[ i++ ]) ) {
 113                                         // check each className given, space seperated list
 114                                         state = isBool ? state : !jQuery(this).hasClass( className );
 115                                         jQuery(this)[ state ? "addClass" : "removeClass" ]( className );
 116                                 }
 117
 118                         } else if ( type === "undefined" || type === "boolean" ) {
 119                                 if ( this.className ) {
 120                                         // store className if set
 121                                         jQuery.data( this, "__className__", this.className );
 122                                 }
 123
 124                                 // toggle whole className
 125                                 this.className = this.className || classNames === false ? "" : jQuery.data( this, "__className__" ) || "";
 126                         }
 127                 });
 128         },
 129
 130         hasClass: function( selector ) {
 131                 var className = " " + selector + " ";
 132                 for ( var i = 0, l = this.length; i < l; i++ ) {
 133                         if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 134                                 return true;
 135                         }
 136                 }
 137
 138                 return false;
 139         },
 140
 141         val: function( value ) {
 142                 if ( value === undefined ) {
 143                         var elem = this[0];
 144
 145                         if ( elem ) {
 146                                 if ( jQuery.nodeName( elem, "option" ) ) {
 147                                         return (elem.attributes.value || {}).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                                                 if ( option.selected ) {
 167                                                         // Get the specifc value for the option
 168                                                         value = jQuery(option).val();
 169
 170                                                         // We don't need an array for one selects
 171                                                         if ( one ) {
 172                                                                 return value;
 173                                                         }
 174
 175                                                         // Multi-Selects return an array
 176                                                         values.push( value );
 177                                                 }
 178                                         }
 179
 180                                         return values;
 181                                 }
 182
 183                                 // Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
 184                                 if ( rradiocheck.test( elem.type ) && !jQuery.support.checkOn ) {
 185                                         return elem.getAttribute("value") === null ? "on" : elem.value;
 186                                 }
 187
 188
 189                                 // Everything else, we just grab the value
 190                                 return (elem.value || "").replace(rreturn, "");
 191
 192                         }
 193
 194                         return undefined;
 195                 }
 196
 197                 // Typecast once if the value is a number
 198                 if ( typeof value === "number" ) {
 199                         value += "";
 200                 }
 201
 202                 var val = value;
 203
 204                 return this.each(function(i) {
 205                         var self = jQuery(this);
 206
 207                         if ( jQuery.isFunction(value) ) {
 208                                 val = value.call(this, i, self.val());
 209
 210                                 // Typecast each time if the value is a Function and the appended
 211                                 // value is therefore different each time.
 212                                 if ( typeof val === "number" ) {
 213                                         val += "";
 214                                 }
 215                         }
 216
 217                         if ( this.nodeType !== 1 ) {
 218                                 return;
 219                         }
 220
 221                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 222                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 223
 224                         } else if ( jQuery.nodeName( this, "select" ) ) {
 225                                 var values = jQuery.makeArray(val);
 226
 227                                 jQuery( "option", this ).each(function() {
 228                                         this.selected = jQuery.inArray( self.val(), values ) >= 0;
 229                                 });
 230
 231                                 if ( !values.length ) {
 232                                         this.selectedIndex = -1;
 233                                 }
 234
 235                         } else {
 236                                 this.value = val;
 237                         }
 238                 });
 239         }
 240 });
 241
 242 jQuery.extend({
 243         attrFn: {
 244                 val: true,
 245                 css: true,
 246                 html: true,
 247                 text: true,
 248                 data: true,
 249                 width: true,
 250                 height: true,
 251                 offset: true
 252         },
 253
 254         attr: function( elem, name, value, pass ) {
 255                 // don't set attributes on text and comment nodes
 256                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 257                         return undefined;
 258                 }
 259
 260                 if ( pass && name in jQuery.attrFn ) {
 261                         return jQuery(elem)[name](value);
 262                 }
 263
 264                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 265                         // Whether we are setting (or getting)
 266                         set = value !== undefined;
 267
 268                 // Try to normalize/fix the name
 269                 name = notxml && jQuery.props[ name ] || name;
 270
 271                 // Only do all the following if this is a node (faster for style)
 272                 if ( elem.nodeType === 1 ) {
 273                         // These attributes require special treatment
 274                         var special = rspecialurl.test( name );
 275
 276                         // Safari mis-reports the default selected property of an option
 277                         // Accessing the parent's selectedIndex property fixes it
 278                         if ( name === "selected" && !jQuery.support.optSelected ) {
 279                                 var parent = elem.parentNode;
 280                                 if ( parent ) {
 281                                         parent.selectedIndex;
 282
 283                                         // Make sure that it also works with optgroups, see #5701
 284                                         if ( parent.parentNode ) {
 285                                                 parent.parentNode.selectedIndex;
 286                                         }
 287                                 }
 288                         }
 289
 290                         // If applicable, access the attribute via the DOM 0 way
 291                         if ( name in elem && 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                                                 throw "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                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 335                                         // Some attributes require a special call on IE
 336                                         elem.getAttribute( name, 2 ) :
 337                                         elem.getAttribute( name );
 338
 339                         // Non-existent attributes return null, we normalize to undefined
 340                         return attr === null ? undefined : attr;
 341                 }
 342
 343                 // elem is actually elem.style ... set the style
 344                 // Using attr for specific style information is now deprecated. Use style insead.
 345                 return jQuery.style( elem, name, value );
 346         }
 347 });