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( value, stateVal ) {
  97                 var type = typeof value, isBool = typeof stateVal === "boolean";
  98
  99                 if ( jQuery.isFunction( value ) ) {
 100                         return this.each(function(i) {
 101                                 var self = jQuery(this);
 102                                 self.toggleClass( value.call(this, i, self.attr("class")), stateVal );
 103                         });
 104                 }
 105
 106                 return this.each(function() {
 107                         if ( type === "string" ) {
 108                                 // toggle individual class names
 109                                 var className, i = 0, self = jQuery(this),
 110                                         state = stateVal,
 111                                         classNames = value.split( rspace );
 112
 113                                 while ( (className = classNames[ i++ ]) ) {
 114                                         // check each className given, space seperated list
 115                                         state = isBool ? state : !self.hasClass( className );
 116                                         self[ state ? "addClass" : "removeClass" ]( className );
 117                                 }
 118
 119                         } else if ( type === "undefined" || type === "boolean" ) {
 120                                 if ( this.className ) {
 121                                         // store className if set
 122                                         jQuery.data( this, "__className__", this.className );
 123                                 }
 124
 125                                 // toggle whole className
 126                                 this.className = this.className || value === false ? "" : jQuery.data( this, "__className__" ) || "";
 127                         }
 128                 });
 129         },
 130
 131         hasClass: function( selector ) {
 132                 var className = " " + selector + " ";
 133                 for ( var i = 0, l = this.length; i < l; i++ ) {
 134                         if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 135                                 return true;
 136                         }
 137                 }
 138
 139                 return false;
 140         },
 141
 142         val: function( value ) {
 143                 if ( value === undefined ) {
 144                         var elem = this[0];
 145
 146                         if ( elem ) {
 147                                 if ( jQuery.nodeName( elem, "option" ) ) {
 148                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 149                                 }
 150
 151                                 // We need to handle select boxes special
 152                                 if ( jQuery.nodeName( elem, "select" ) ) {
 153                                         var index = elem.selectedIndex,
 154                                                 values = [],
 155                                                 options = elem.options,
 156                                                 one = elem.type === "select-one";
 157
 158                                         // Nothing was selected
 159                                         if ( index < 0 ) {
 160                                                 return null;
 161                                         }
 162
 163                                         // Loop through all the selected options
 164                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 165                                                 var option = options[ i ];
 166
 167                                                 if ( option.selected ) {
 168                                                         // Get the specifc value for the option
 169                                                         value = jQuery(option).val();
 170
 171                                                         // We don't need an array for one selects
 172                                                         if ( one ) {
 173                                                                 return value;
 174                                                         }
 175
 176                                                         // Multi-Selects return an array
 177                                                         values.push( value );
 178                                                 }
 179                                         }
 180
 181                                         return values;
 182                                 }
 183
 184                                 // Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
 185                                 if ( rradiocheck.test( elem.type ) && !jQuery.support.checkOn ) {
 186                                         return elem.getAttribute("value") === null ? "on" : elem.value;
 187                                 }
 188
 189
 190                                 // Everything else, we just grab the value
 191                                 return (elem.value || "").replace(rreturn, "");
 192
 193                         }
 194
 195                         return undefined;
 196                 }
 197
 198                 var isFunction = jQuery.isFunction(value);
 199
 200                 return this.each(function(i) {
 201                         var self = jQuery(this), val = value;
 202
 203                         if ( this.nodeType !== 1 ) {
 204                                 return;
 205                         }
 206
 207                         if ( isFunction ) {
 208                                 val = value.call(this, i, self.val());
 209                         }
 210
 211                         // Typecast each time if the value is a Function and the appended
 212                         // value is therefore different each time.
 213                         if ( typeof val === "number" ) {
 214                                 val += "";
 215                         }
 216
 217                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 218                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 219
 220                         } else if ( jQuery.nodeName( this, "select" ) ) {
 221                                 var values = jQuery.makeArray(val);
 222
 223                                 jQuery( "option", this ).each(function() {
 224                                         this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
 225                                 });
 226
 227                                 if ( !values.length ) {
 228                                         this.selectedIndex = -1;
 229                                 }
 230
 231                         } else {
 232                                 this.value = val;
 233                         }
 234                 });
 235         }
 236 });
 237
 238 jQuery.extend({
 239         attrFn: {
 240                 val: true,
 241                 css: true,
 242                 html: true,
 243                 text: true,
 244                 data: true,
 245                 width: true,
 246                 height: true,
 247                 offset: true
 248         },
 249
 250         attr: function( elem, name, value, pass ) {
 251                 // don't set attributes on text and comment nodes
 252                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 253                         return undefined;
 254                 }
 255
 256                 if ( pass && name in jQuery.attrFn ) {
 257                         return jQuery(elem)[name](value);
 258                 }
 259
 260                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 261                         // Whether we are setting (or getting)
 262                         set = value !== undefined;
 263
 264                 // Try to normalize/fix the name
 265                 name = notxml && jQuery.props[ name ] || name;
 266
 267                 // Only do all the following if this is a node (faster for style)
 268                 if ( elem.nodeType === 1 ) {
 269                         // These attributes require special treatment
 270                         var special = rspecialurl.test( name );
 271
 272                         // Safari mis-reports the default selected property of an option
 273                         // Accessing the parent's selectedIndex property fixes it
 274                         if ( name === "selected" && !jQuery.support.optSelected ) {
 275                                 var parent = elem.parentNode;
 276                                 if ( parent ) {
 277                                         parent.selectedIndex;
 278
 279                                         // Make sure that it also works with optgroups, see #5701
 280                                         if ( parent.parentNode ) {
 281                                                 parent.parentNode.selectedIndex;
 282                                         }
 283                                 }
 284                         }
 285
 286                         // If applicable, access the attribute via the DOM 0 way
 287                         if ( name in elem && notxml && !special ) {
 288                                 if ( set ) {
 289                                         // We can't allow the type property to be changed (since it causes problems in IE)
 290                                         if ( name === "type" && rtype.test( elem.nodeName ) && elem.parentNode ) {
 291                                                 throw "type property can't be changed";
 292                                         }
 293
 294                                         elem[ name ] = value;
 295                                 }
 296
 297                                 // browsers index elements by id/name on forms, give priority to attributes.
 298                                 if ( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) ) {
 299                                         return elem.getAttributeNode( name ).nodeValue;
 300                                 }
 301
 302                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 303                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 304                                 if ( name === "tabIndex" ) {
 305                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
 306
 307                                         return attributeNode && attributeNode.specified ?
 308                                                 attributeNode.value :
 309                                                 rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
 310                                                         0 :
 311                                                         undefined;
 312                                 }
 313
 314                                 return elem[ name ];
 315                         }
 316
 317                         if ( !jQuery.support.style && notxml && name === "style" ) {
 318                                 if ( set ) {
 319                                         elem.style.cssText = "" + value;
 320                                 }
 321
 322                                 return elem.style.cssText;
 323                         }
 324
 325                         if ( set ) {
 326                                 // convert the value to a string (all browsers do this but IE) see #1070
 327                                 elem.setAttribute( name, "" + value );
 328                         }
 329
 330                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 331                                         // Some attributes require a special call on IE
 332                                         elem.getAttribute( name, 2 ) :
 333                                         elem.getAttribute( name );
 334
 335                         // Non-existent attributes return null, we normalize to undefined
 336                         return attr === null ? undefined : attr;
 337                 }
 338
 339                 // elem is actually elem.style ... set the style
 340                 // Using attr for specific style information is now deprecated. Use style insead.
 341                 return jQuery.style( elem, name, value );
 342         }
 343 });