src/attributes.js

   1 (function( jQuery ) {
   2
   3 var rclass = /[\n\t\r]/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 + " ",
  59                                                         setClass = elem.className;
  60
  61                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  62                                                         if ( className.indexOf( " " + classNames[c] + " " ) < 0 ) {
  63                                                                 setClass += " " + classNames[c];
  64                                                         }
  65                                                 }
  66                                                 elem.className = jQuery.trim( setClass );
  67                                         }
  68                                 }
  69                         }
  70                 }
  71
  72                 return this;
  73         },
  74
  75         removeClass: function( value ) {
  76                 if ( jQuery.isFunction(value) ) {
  77                         return this.each(function(i) {
  78                                 var self = jQuery(this);
  79                                 self.removeClass( value.call(this, i, self.attr("class")) );
  80                         });
  81                 }
  82
  83                 if ( (value && typeof value === "string") || value === undefined ) {
  84                         var classNames = (value || "").split( rspaces );
  85
  86                         for ( var i = 0, l = this.length; i < l; i++ ) {
  87                                 var elem = this[i];
  88
  89                                 if ( elem.nodeType === 1 && elem.className ) {
  90                                         if ( value ) {
  91                                                 var className = (" " + elem.className + " ").replace(rclass, " ");
  92                                                 for ( var c = 0, cl = classNames.length; c < cl; c++ ) {
  93                                                         className = className.replace(" " + classNames[c] + " ", " ");
  94                                                 }
  95                                                 elem.className = jQuery.trim( className );
  96
  97                                         } else {
  98                                                 elem.className = "";
  99                                         }
 100                                 }
 101                         }
 102                 }
 103
 104                 return this;
 105         },
 106
 107         toggleClass: function( value, stateVal ) {
 108                 var type = typeof value,
 109                         isBool = typeof stateVal === "boolean";
 110
 111                 if ( jQuery.isFunction( value ) ) {
 112                         return this.each(function(i) {
 113                                 var self = jQuery(this);
 114                                 self.toggleClass( value.call(this, i, self.attr("class"), stateVal), stateVal );
 115                         });
 116                 }
 117
 118                 return this.each(function() {
 119                         if ( type === "string" ) {
 120                                 // toggle individual class names
 121                                 var className,
 122                                         i = 0,
 123                                         self = jQuery( this ),
 124                                         state = stateVal,
 125                                         classNames = value.split( rspaces );
 126
 127                                 while ( (className = classNames[ i++ ]) ) {
 128                                         // check each className given, space seperated list
 129                                         state = isBool ? state : !self.hasClass( className );
 130                                         self[ state ? "addClass" : "removeClass" ]( className );
 131                                 }
 132
 133                         } else if ( type === "undefined" || type === "boolean" ) {
 134                                 if ( this.className ) {
 135                                         // store className if set
 136                                         jQuery._data( this, "__className__", this.className );
 137                                 }
 138
 139                                 // toggle whole className
 140                                 this.className = this.className || value === false ? "" : jQuery._data( this, "__className__" ) || "";
 141                         }
 142                 });
 143         },
 144
 145         hasClass: function( selector ) {
 146                 var className = " " + selector + " ";
 147                 for ( var i = 0, l = this.length; i < l; i++ ) {
 148                         if ( (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
 149                                 return true;
 150                         }
 151                 }
 152
 153                 return false;
 154         },
 155
 156         val: function( value ) {
 157                 if ( !arguments.length ) {
 158                         var elem = this[0];
 159
 160                         if ( elem ) {
 161                                 if ( jQuery.nodeName( elem, "option" ) ) {
 162                                         // attributes.value is undefined in Blackberry 4.7 but
 163                                         // uses .value. See #6932
 164                                         var val = elem.attributes.value;
 165                                         return !val || val.specified ? elem.value : elem.text;
 166                                 }
 167
 168                                 // We need to handle select boxes special
 169                                 if ( jQuery.nodeName( elem, "select" ) ) {
 170                                         var index = elem.selectedIndex,
 171                                                 values = [],
 172                                                 options = elem.options,
 173                                                 one = elem.type === "select-one";
 174
 175                                         // Nothing was selected
 176                                         if ( index < 0 ) {
 177                                                 return null;
 178                                         }
 179
 180                                         // Loop through all the selected options
 181                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 182                                                 var option = options[ i ];
 183
 184                                                 // Don't return options that are disabled or in a disabled optgroup
 185                                                 if ( option.selected && (jQuery.support.optDisabled ? !option.disabled : option.getAttribute("disabled") === null) &&
 186                                                                 (!option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" )) ) {
 187
 188                                                         // Get the specific value for the option
 189                                                         value = jQuery(option).val();
 190
 191                                                         // We don't need an array for one selects
 192                                                         if ( one ) {
 193                                                                 return value;
 194                                                         }
 195
 196                                                         // Multi-Selects return an array
 197                                                         values.push( value );
 198                                                 }
 199                                         }
 200
 201                                         return values;
 202                                 }
 203
 204                                 // Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
 205                                 if ( rradiocheck.test( elem.type ) && !jQuery.support.checkOn ) {
 206                                         return elem.getAttribute("value") === null ? "on" : elem.value;
 207                                 }
 208
 209                                 // Everything else, we just grab the value
 210                                 return (elem.value || "").replace(rreturn, "");
 211
 212                         }
 213
 214                         return undefined;
 215                 }
 216
 217                 var isFunction = jQuery.isFunction(value);
 218
 219                 return this.each(function(i) {
 220                         var self = jQuery(this), val = value;
 221
 222                         if ( this.nodeType !== 1 ) {
 223                                 return;
 224                         }
 225
 226                         if ( isFunction ) {
 227                                 val = value.call(this, i, self.val());
 228                         }
 229
 230                         // Treat null/undefined as ""; convert numbers to string
 231                         if ( val == null ) {
 232                                 val = "";
 233                         } else if ( typeof val === "number" ) {
 234                                 val += "";
 235                         } else if ( jQuery.isArray(val) ) {
 236                                 val = jQuery.map(val, function (value) {
 237                                         return value == null ? "" : value + "";
 238                                 });
 239                         }
 240
 241                         if ( jQuery.isArray(val) && rradiocheck.test( this.type ) ) {
 242                                 this.checked = jQuery.inArray( self.val(), val ) >= 0;
 243
 244                         } else if ( jQuery.nodeName( this, "select" ) ) {
 245                                 var values = jQuery.makeArray(val);
 246
 247                                 jQuery( "option", this ).each(function() {
 248                                         this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
 249                                 });
 250
 251                                 if ( !values.length ) {
 252                                         this.selectedIndex = -1;
 253                                 }
 254
 255                         } else {
 256                                 this.value = val;
 257                         }
 258                 });
 259         }
 260 });
 261
 262 jQuery.extend({
 263         attrFn: {
 264                 val: true,
 265                 css: true,
 266                 html: true,
 267                 text: true,
 268                 data: true,
 269                 width: true,
 270                 height: true,
 271                 offset: true
 272         },
 273
 274         attr: function( elem, name, value, pass ) {
 275                 // don't get/set attributes on text, comment and attribute nodes
 276                 if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || elem.nodeType === 2 ) {
 277                         return undefined;
 278                 }
 279
 280                 if ( pass && name in jQuery.attrFn ) {
 281                         return jQuery(elem)[name](value);
 282                 }
 283
 284                 var notxml = elem.nodeType !== 1 || !jQuery.isXMLDoc( elem ),
 285                         // Whether we are setting (or getting)
 286                         set = value !== undefined;
 287
 288                 // Try to normalize/fix the name
 289                 name = notxml && jQuery.props[ name ] || name;
 290
 291                 // Only do all the following if this is a node (faster for style)
 292                 if ( elem.nodeType === 1 ) {
 293                         // These attributes require special treatment
 294                         var special = rspecialurl.test( name );
 295
 296                         // Safari mis-reports the default selected property of an option
 297                         // Accessing the parent's selectedIndex property fixes it
 298                         if ( name === "selected" && !jQuery.support.optSelected ) {
 299                                 var parent = elem.parentNode;
 300                                 if ( parent ) {
 301                                         parent.selectedIndex;
 302
 303                                         // Make sure that it also works with optgroups, see #5701
 304                                         if ( parent.parentNode ) {
 305                                                 parent.parentNode.selectedIndex;
 306                                         }
 307                                 }
 308                         }
 309
 310                         // If applicable, access the attribute via the DOM 0 way
 311                         // 'in' checks fail in Blackberry 4.7 #6931
 312                         if ( (name in elem || elem[ name ] !== undefined) && notxml && !special ) {
 313                                 if ( set ) {
 314                                         // We can't allow the type property to be changed (since it causes problems in IE)
 315                                         if ( name === "type" && rtype.test( elem.nodeName ) && elem.parentNode ) {
 316                                                 jQuery.error( "type property can't be changed" );
 317                                         }
 318
 319                                         if ( value === null ) {
 320                                                 if ( elem.nodeType === 1 ) {
 321                                                         elem.removeAttribute( name );
 322                                                 }
 323
 324                                         } else {
 325                                                 elem[ name ] = value;
 326                                         }
 327                                 }
 328
 329                                 // browsers index elements by id/name on forms, give priority to attributes.
 330                                 if ( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) ) {
 331                                         return elem.getAttributeNode( name ).nodeValue;
 332                                 }
 333
 334                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 335                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 336                                 if ( name === "tabIndex" ) {
 337                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
 338
 339                                         return attributeNode && attributeNode.specified ?
 340                                                 attributeNode.value :
 341                                                 rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
 342                                                         0 :
 343                                                         undefined;
 344                                 }
 345
 346                                 return elem[ name ];
 347                         }
 348
 349                         if ( !jQuery.support.style && notxml && name === "style" ) {
 350                                 if ( set ) {
 351                                         elem.style.cssText = "" + value;
 352                                 }
 353
 354                                 return elem.style.cssText;
 355                         }
 356
 357                         if ( set ) {
 358                                 // convert the value to a string (all browsers do this but IE) see #1070
 359                                 elem.setAttribute( name, "" + value );
 360                         }
 361
 362                         // Ensure that missing attributes return undefined
 363                         // Blackberry 4.7 returns "" from getAttribute #6938
 364                         if ( !elem.attributes[ name ] && (elem.hasAttribute && !elem.hasAttribute( name )) ) {
 365                                 return undefined;
 366                         }
 367
 368                         var attr = !jQuery.support.hrefNormalized && notxml && special ?
 369                                         // Some attributes require a special call on IE
 370                                         elem.getAttribute( name, 2 ) :
 371                                         elem.getAttribute( name );
 372
 373                         // Non-existent attributes return null, we normalize to undefined
 374                         return attr === null ? undefined : attr;
 375                 }
 376                 // Handle everything which isn't a DOM element node
 377                 if ( set ) {
 378                         elem[ name ] = value;
 379                 }
 380                 return elem[ name ];
 381         }
 382 });
 383
 384 })( jQuery );