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.props = {
  13         "for": "htmlFor",
  14         "class": "className",
  15         readonly: "readOnly",
  16         maxlength: "maxLength",
  17         cellspacing: "cellSpacing",
  18         rowspan: "rowSpan",
  19         colspan: "colSpan",
  20         tabindex: "tabIndex",
  21         usemap: "useMap",
  22         frameborder: "frameBorder"
  23 };
  24
  25 jQuery.fn.extend({
  26         attr: function( name, value ) {
  27                 return jQuery.access( this, name, value, true, jQuery.attr );
  28         },
  29
  30         removeAttr: function( name, fn ) {
  31                 return this.each(function(){
  32                         jQuery.attr( this, name, "" );
  33                         if ( this.nodeType === 1 ) {
  34                                 this.removeAttribute( name );
  35                         }
  36                 });
  37         },
  38
  39         addClass: function( value ) {
  40                 if ( jQuery.isFunction(value) ) {
  41                         return this.each(function(i) {
  42                                 var self = jQuery(this);
  43                                 self.addClass( value.call(this, i, self.attr("class")) );
  44                         });
  45                 }
  46
  47                 if ( value && typeof value === "string" ) {
  48                         var classNames = (value || "").split( rspaces );
  49
  50                         for ( var i = 0, l = this.length; i < l; i++ ) {
  51                                 var elem = this[i];
  52
  53                                 if ( elem.nodeType === 1 ) {
  54                                         if ( !elem.className ) {
  55                                                 elem.className = value;
  56
  57                                         } else {
  58                                                 var className = " " + elem.className + " ", setClass = elem.className;
  59                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  60                                                         if ( className.indexOf( " " + classNames[c] + " " ) < 0 ) {
  61                                                                 setClass += " " + classNames[c];
  62                                                         }
  63                                                 }
  64                                                 elem.className = jQuery.trim( setClass );
  65                                         }
  66                                 }
  67                         }
  68                 }
  69
  70                 return this;
  71         },
  72
  73         removeClass: function( value ) {
  74                 if ( jQuery.isFunction(value) ) {
  75                         return this.each(function(i) {
  76                                 var self = jQuery(this);
  77                                 self.removeClass( value.call(this, i, self.attr("class")) );
  78                         });
  79                 }
  80
  81                 if ( (value && typeof value === "string") || value === undefined ) {
  82                         var classNames = (value || "").split( rspaces );
  83
  84                         for ( var i = 0, l = this.length; i < l; i++ ) {
  85                                 var elem = this[i];
  86
  87                                 if ( elem.nodeType === 1 && elem.className ) {
  88                                         if ( value ) {
  89                                                 var className = (" " + elem.className + " ").replace(rclass, " ");
  90                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  91                                                         className = className.replace(" " + classNames[c] + " ", " ");
  92                                                 }
  93                                                 elem.className = jQuery.trim( className );
  94
  95                                         } else {
  96                                                 elem.className = "";
  97                                         }
  98                                 }
  99                         }
 100                 }
 101
 102                 return this;
 103         },
 104
 105         toggleClass: function( value, stateVal ) {
 106                 var type = typeof value, isBool = typeof stateVal === "boolean";
 107
 108                 if ( jQuery.isFunction( value ) ) {
 109                         return this.each(function(i) {
 110                                 var self = jQuery(this);
 111                                 self.toggleClass( value.call(this, i, self.attr("class"), stateVal), stateVal );
 112                         });
 113                 }
 114
 115                 return this.each(function() {
 116                         if ( type === "string" ) {
 117                                 // toggle individual class names
 118                                 var className, i = 0, self = jQuery(this),
 119                                         state = stateVal,
 120                                         classNames = value.split( rspaces );
 121
 122                                 while ( (className = classNames[ i++ ]) ) {
 123                                         // check each className given, space seperated list
 124                                         state = isBool ? state : !self.hasClass( className );
 125                                         self[ state ? "addClass" : "removeClass" ]( className );
 126                                 }
 127
 128                         } else if ( type === "undefined" || type === "boolean" ) {
 129                                 if ( this.className ) {
 130                                         // store className if set
 131                                         jQuery.data( this, "__className__", this.className );
 132                                 }
 133
 134                                 // toggle whole className
 135                                 this.className = this.className || value === false ? "" : jQuery.data( this, "__className__" ) || "";
 136                         }
 137                 });
 138         },
 139
 140         hasClass: function( selector ) {
 141                 var className = " " + selector + " ";
 142                 for ( var i = 0, l = this.length; i < l; i++ ) {
 143                         if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 144                                 return true;
 145                         }
 146                 }
 147
 148                 return false;
 149         },
 150
 151         val: function( value ) {
 152                 if ( !arguments.length ) {
 153                         var elem = this[0];
 154
 155                         if ( elem ) {
 156                                 if ( jQuery.nodeName( elem, "option" ) ) {
 157                                         // attributes.value is undefined in Blackberry 4.7 but
 158                                         // uses .value. See #6932
 159                                         var val = elem.attributes.value;
 160                                         return !val || val.specified ? elem.value : elem.text;
 161                                 }
 162
 163                                 // We need to handle select boxes special
 164                                 if ( jQuery.nodeName( elem, "select" ) ) {
 165                                         var index = elem.selectedIndex,
 166                                                 values = [],
 167                                                 options = elem.options,
 168                                                 one = elem.type === "select-one";
 169
 170                                         // Nothing was selected
 171                                         if ( index < 0 ) {
 172                                                 return null;
 173                                         }
 174
 175                                         // Loop through all the selected options
 176                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 177                                                 var option = options[ i ];
 178
 179                                                 // Don't return options that are disabled or in a disabled optgroup
 180                                                 if ( option.selected && (jQuery.support.optDisabled ? !option.disabled : option.getAttribute("disabled") === null) &&
 181                                                                 (!option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" )) ) {
 182
 183                                                         // Get the specific value for the option
 184                                                         value = jQuery(option).val();
 185
 186                                                         // We don't need an array for one selects
 187                                                         if ( one ) {
 188                                                                 return value;
 189                                                         }
 190
 191                                                         // Multi-Selects return an array
 192                                                         values.push( value );
 193                                                 }
 194                                         }
 195
 196                                         return values;
 197                                 }
 198
 199                                 // Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
 200                                 if ( rradiocheck.test( elem.type ) && !jQuery.support.checkOn ) {
 201                                         return elem.getAttribute("value") === null ? "on" : elem.value;
 202                                 }
 203
 204
 205                                 // Everything else, we just grab the value
 206                                 return (elem.value || "").replace(rreturn, "");
 207
 208                         }
 209
 210                         return undefined;
 211                 }
 212
 213                 var isFunction = jQuery.isFunction(value);
 214
 215                 return this.each(function(i) {
 216                         var self = jQuery(this), val = value;
 217
 218                         if ( this.nodeType !== 1 ) {
 219                                 return;
 220                         }
 221
 222                         if ( isFunction ) {
 223                                 val = value.call(this, i, self.val());
 224                         }
 225
 226                         // Treat null/undefined as ""; convert numbers to string
 227                         if ( val == null ) {
 228                                 val = "";
 229                         } else if ( typeof val === "number" ) {
 230                                 val += "";
 231                         } else if ( jQuery.isArray(val) ) {
 232                                 val = jQuery.map(val, function (value) {
 233                                         return value == null ? "" : value + "";
 234                                 });
 235                         }
 236
 237                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 238                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 239
 240                         } else if ( jQuery.nodeName( this, "select" ) ) {
 241                                 var values = jQuery.makeArray(val);
 242
 243                                 jQuery( "option", this ).each(function() {
 244                                         this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
 245                                 });
 246
 247                                 if ( !values.length ) {
 248                                         this.selectedIndex = -1;
 249                                 }
 250
 251                         } else {
 252                                 this.value = val;
 253                         }
 254                 });
 255         }
 256 });
 257
 258 jQuery.extend({
 259         attrFn: {
 260                 val: true,
 261                 css: true,
 262                 html: true,
 263                 text: true,
 264                 data: true,
 265                 width: true,
 266                 height: true,
 267                 offset: true
 268         },
 269
 270         attr: function( elem, name, value, pass ) {
 271                 // don't set attributes on text and comment nodes
 272                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
 273                         return undefined;
 274                 }
 275
 276                 if ( pass && name in jQuery.attrFn ) {
 277                         return jQuery(elem)[name](value);
 278                 }
 279
 280                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 281                         // Whether we are setting (or getting)
 282                         set = value !== undefined;
 283
 284                 // Try to normalize/fix the name
 285                 name = notxml && jQuery.props[ name ] || name;
 286
 287                 // Only do all the following if this is a node (faster for style)
 288                 if ( elem.nodeType === 1 ) {
 289                         // These attributes require special treatment
 290                         var special = rspecialurl.test( name );
 291
 292                         // Safari mis-reports the default selected property of an option
 293                         // Accessing the parent's selectedIndex property fixes it
 294                         if ( name === "selected" && !jQuery.support.optSelected ) {
 295                                 var parent = elem.parentNode;
 296                                 if ( parent ) {
 297                                         parent.selectedIndex;
 298
 299                                         // Make sure that it also works with optgroups, see #5701
 300                                         if ( parent.parentNode ) {
 301                                                 parent.parentNode.selectedIndex;
 302                                         }
 303                                 }
 304                         }
 305
 306                         // If applicable, access the attribute via the DOM 0 way
 307                         // 'in' checks fail in Blackberry 4.7 #6931
 308                         if ( (name in elem || elem[ name ] !== undefined) && notxml && !special ) {
 309                                 if ( set ) {
 310                                         // We can't allow the type property to be changed (since it causes problems in IE)
 311                                         if ( name === "type" && rtype.test( elem.nodeName ) && elem.parentNode ) {
 312                                                 jQuery.error( "type property can't be changed" );
 313                                         }
 314
 315                                         if ( value === null ) {
 316                                                 if ( elem.nodeType === 1 ) {
 317                                                         elem.removeAttribute( name );
 318                                                 }
 319
 320                                         } else {
 321                                                 elem[ name ] = value;
 322                                         }
 323                                 }
 324
 325                                 // browsers index elements by id/name on forms, give priority to attributes.
 326                                 if ( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) ) {
 327                                         return elem.getAttributeNode( name ).nodeValue;
 328                                 }
 329
 330                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 331                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 332                                 if ( name === "tabIndex" ) {
 333                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
 334
 335                                         return attributeNode && attributeNode.specified ?
 336                                                 attributeNode.value :
 337                                                 rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
 338                                                         0 :
 339                                                         undefined;
 340                                 }
 341
 342                                 return elem[ name ];
 343                         }
 344
 345                         if ( !jQuery.support.style && notxml && name === "style" ) {
 346                                 if ( set ) {
 347                                         elem.style.cssText = "" + value;
 348                                 }
 349
 350                                 return elem.style.cssText;
 351                         }
 352
 353                         if ( set ) {
 354                                 // convert the value to a string (all browsers do this but IE) see #1070
 355                                 elem.setAttribute( name, "" + value );
 356                         }
 357
 358                         // Ensure that missing attributes return undefined
 359                         // Blackberry 4.7 returns "" from getAttribute #6938
 360                         if ( !elem.attributes[ name ] && (elem.hasAttribute && !elem.hasAttribute( name )) ) {
 361                                 return undefined;
 362                         }
 363
 364                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 365                                         // Some attributes require a special call on IE
 366                                         elem.getAttribute( name, 2 ) :
 367                                         elem.getAttribute( name );
 368
 369                         // Non-existent attributes return null, we normalize to undefined
 370                         return attr === null ? undefined : attr;
 371                 }
 372         }
 373 });
 374
 375 })( jQuery );