define( [

  	"../core",

  	"../core/stripAndCollapse",
  	"../var/rnothtmlwhite",
  	"../data/var/dataPriv",

  	"../core/init"

  ], function( jQuery, stripAndCollapse, rnothtmlwhite, dataPriv ) {

  "use strict";

  function getClass( elem ) {
  	return elem.getAttribute && elem.getAttribute( "class" ) || "";
  }
  
  jQuery.fn.extend( {

  	addClass: function( value ) {

  		var classes, elem, cur, curValue, clazz, j, finalValue,
  			i = 0;

  
  		if ( jQuery.isFunction( value ) ) {

  			return this.each( function( j ) {
  				jQuery( this ).addClass( value.call( this, j, getClass( this ) ) );
  			} );

  		}

  		if ( typeof value === "string" && value ) {
  			classes = value.match( rnothtmlwhite ) || [];

  			while ( ( elem = this[ i++ ] ) ) {
  				curValue = getClass( elem );
  				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );

  
  				if ( cur ) {
  					j = 0;

  					while ( ( clazz = classes[ j++ ] ) ) {

  						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
  							cur += clazz + " ";
  						}
  					}

  					// Only assign if different to avoid unneeded rendering.
  					finalValue = stripAndCollapse( cur );
  					if ( curValue !== finalValue ) {
  						elem.setAttribute( "class", finalValue );

  					}
  				}
  			}
  		}
  
  		return this;
  	},
  
  	removeClass: function( value ) {

  		var classes, elem, cur, curValue, clazz, j, finalValue,
  			i = 0;

  
  		if ( jQuery.isFunction( value ) ) {

  			return this.each( function( j ) {
  				jQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );
  			} );
  		}
  
  		if ( !arguments.length ) {
  			return this.attr( "class", "" );

  		}

  		if ( typeof value === "string" && value ) {
  			classes = value.match( rnothtmlwhite ) || [];
  
  			while ( ( elem = this[ i++ ] ) ) {
  				curValue = getClass( elem );

  				// This expression is here for better compressibility (see addClass)

  				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );

  
  				if ( cur ) {
  					j = 0;

  					while ( ( clazz = classes[ j++ ] ) ) {

  						// Remove *all* instances

  						while ( cur.indexOf( " " + clazz + " " ) > -1 ) {

  							cur = cur.replace( " " + clazz + " ", " " );
  						}
  					}

  					// Only assign if different to avoid unneeded rendering.
  					finalValue = stripAndCollapse( cur );
  					if ( curValue !== finalValue ) {
  						elem.setAttribute( "class", finalValue );

  					}
  				}
  			}
  		}
  
  		return this;
  	},
  
  	toggleClass: function( value, stateVal ) {
  		var type = typeof value;
  
  		if ( typeof stateVal === "boolean" && type === "string" ) {
  			return stateVal ? this.addClass( value ) : this.removeClass( value );
  		}
  
  		if ( jQuery.isFunction( value ) ) {

  			return this.each( function( i ) {
  				jQuery( this ).toggleClass(
  					value.call( this, i, getClass( this ), stateVal ),
  					stateVal
  				);
  			} );

  		}

  		return this.each( function() {
  			var className, i, self, classNames;

  			if ( type === "string" ) {

  
  				// Toggle individual class names
  				i = 0;
  				self = jQuery( this );
  				classNames = value.match( rnothtmlwhite ) || [];
  
  				while ( ( className = classNames[ i++ ] ) ) {
  
  					// Check each className given, space separated list

  					if ( self.hasClass( className ) ) {
  						self.removeClass( className );
  					} else {
  						self.addClass( className );
  					}
  				}
  
  			// Toggle whole class name

  			} else if ( value === undefined || type === "boolean" ) {
  				className = getClass( this );
  				if ( className ) {
  
  					// Store className if set
  					dataPriv.set( this, "__className__", className );

  				}

  				// If the element has a class name or if we're passed `false`,

  				// then remove the whole classname (if there was one, the above saved it).
  				// Otherwise bring back whatever was previously saved (if anything),
  				// falling back to the empty string if nothing was stored.

  				if ( this.setAttribute ) {
  					this.setAttribute( "class",
  						className || value === false ?
  						"" :
  						dataPriv.get( this, "__className__" ) || ""
  					);
  				}

  			}

  		} );

  	},
  
  	hasClass: function( selector ) {

  		var className, elem,
  			i = 0;
  
  		className = " " + selector + " ";
  		while ( ( elem = this[ i++ ] ) ) {
  			if ( elem.nodeType === 1 &&
  				( " " + stripAndCollapse( getClass( elem ) ) + " " ).indexOf( className ) > -1 ) {
  					return true;

  			}
  		}
  
  		return false;
  	}

  } );

  } );