src/attributes.js

   1 (function( jQuery ) {
   2
   3 var rclass = /[\n\t]/g,
   4         rspace = /\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|area)$/i,
  10         rradiocheck = /radio|checkbox/;
  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( rspace );
  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(rspace);
  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( rspace );
 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 ( value === undefined ) {
 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                                                 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                 var isFunction = jQuery.isFunction(value);
 198
 199                 return this.each(function(i) {
 200                         var self = jQuery(this), val = value;
 201
 202                         if ( this.nodeType !== 1 ) {
 203                                 return;
 204                         }
 205
 206                         if ( isFunction ) {
 207                                 val = value.call(this, i, self.val());
 208                         }
 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                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 217                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 218
 219                         } else if ( jQuery.nodeName( this, "select" ) ) {
 220                                 var values = jQuery.makeArray(val);
 221
 222                                 jQuery( "option", this ).each(function() {
 223                                         this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
 224                                 });
 225
 226                                 if ( !values.length ) {
 227                                         this.selectedIndex = -1;
 228                                 }
 229
 230                         } else {
 231                                 this.value = val;
 232                         }
 233                 });
 234         }
 235 });
 236
 237 jQuery.extend({
 238         attrFn: {
 239                 val: true,
 240                 css: true,
 241                 html: true,
 242                 text: true,
 243                 data: true,
 244                 width: true,
 245                 height: true,
 246                 offset: true
 247         },
 248
 249         attr: function( elem, name, value, pass ) {
 250                 // don't set attributes on text and comment nodes
 251                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 252                         return undefined;
 253                 }
 254
 255                 if ( pass && name in jQuery.attrFn ) {
 256                         return jQuery(elem)[name](value);
 257                 }
 258
 259                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 260                         // Whether we are setting (or getting)
 261                         set = value !== undefined;
 262
 263                 // Try to normalize/fix the name
 264                 name = notxml && jQuery.props[ name ] || name;
 265
 266                 // Only do all the following if this is a node (faster for style)
 267                 if ( elem.nodeType === 1 ) {
 268                         // These attributes require special treatment
 269                         var special = rspecialurl.test( name );
 270
 271                         // Safari mis-reports the default selected property of an option
 272                         // Accessing the parent's selectedIndex property fixes it
 273                         if ( name === "selected" && !jQuery.support.optSelected ) {
 274                                 var parent = elem.parentNode;
 275                                 if ( parent ) {
 276                                         parent.selectedIndex;
 277
 278                                         // Make sure that it also works with optgroups, see #5701
 279                                         if ( parent.parentNode ) {
 280                                                 parent.parentNode.selectedIndex;
 281                                         }
 282                                 }
 283                         }
 284
 285                         // If applicable, access the attribute via the DOM 0 way
 286                         // 'in' checks fail in Blackberry 4.7 #6931
 287                         if ( (name in elem || elem[ name ] !== undefined) && 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                                                 jQuery.error( "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                         // Ensure that missing attributes return undefined
 331                         // Blackberry 4.7 returns "" from getAttribute #6938
 332                         if ( !elem.attributes[ name ] && !elem.hasAttribute( name ) ) {
 333                                 return undefined;
 334                         }
 335
 336                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 337                                         // Some attributes require a special call on IE
 338                                         elem.getAttribute( name, 2 ) :
 339                                         elem.getAttribute( name );
 340
 341                         // Non-existent attributes return null, we normalize to undefined
 342                         return attr === null ? undefined : attr;
 343                 }
 344
 345                 // elem is actually elem.style ... set the style
 346                 // Using attr for specific style information is now deprecated. Use style instead.
 347                 return jQuery.style( elem, name, value );
 348         }
 349 });
 350
 351 })( jQuery );