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