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