SGH / COMPONENTS

  define( [

  	"../core",
  	"../var/rnotwhite",

  	"./var/acceptData"
  ], function( jQuery, rnotwhite, acceptData ) {

  
  function Data() {

  	this.expando = jQuery.expando + Data.uid++;
  }
  
  Data.uid = 1;

  
  Data.prototype = {

  
  	register: function( owner, initial ) {
  		var value = initial || {};
  
  		// If it is a node unlikely to be stringify-ed or looped over
  		// use plain assignment
  		if ( owner.nodeType ) {
  			owner[ this.expando ] = value;
  
  		// Otherwise secure it in a non-enumerable, non-writable property
  		// configurability must be true to allow the property to be
  		// deleted with the delete operator
  		} else {
  			Object.defineProperty( owner, this.expando, {
  				value: value,
  				writable: true,
  				configurable: true
  			} );
  		}
  		return owner[ this.expando ];
  	},
  	cache: function( owner ) {
  

  		// We can accept data for non-element nodes in modern browsers,
  		// but we should not, see #8335.

  		// Always return an empty object.
  		if ( !acceptData( owner ) ) {
  			return {};

  		}
  

  		// Check if the owner object already has a cache
  		var value = owner[ this.expando ];

  
  		// If not, create one

  		if ( !value ) {
  			value = {};
  
  			// We can accept data for non-element nodes in modern browsers,
  			// but we should not, see #8335.
  			// Always return an empty object.
  			if ( acceptData( owner ) ) {
  
  				// If it is a node unlikely to be stringify-ed or looped over
  				// use plain assignment
  				if ( owner.nodeType ) {
  					owner[ this.expando ] = value;
  
  				// Otherwise secure it in a non-enumerable property
  				// configurable must be true to allow the property to be
  				// deleted when data is removed
  				} else {
  					Object.defineProperty( owner, this.expando, {
  						value: value,
  						configurable: true
  					} );
  				}

  			}
  		}
  

  		return value;

  	},
  	set: function( owner, data, value ) {
  		var prop,

  			cache = this.cache( owner );

  
  		// Handle: [ owner, key, value ] args
  		if ( typeof data === "string" ) {
  			cache[ data ] = value;
  
  		// Handle: [ owner, { properties } ] args
  		} else {

  
  			// Copy the properties one-by-one to the cache object
  			for ( prop in data ) {
  				cache[ prop ] = data[ prop ];

  			}
  		}
  		return cache;
  	},
  	get: function( owner, key ) {

  		return key === undefined ?

  			this.cache( owner ) :
  			owner[ this.expando ] && owner[ this.expando ][ key ];

  	},
  	access: function( owner, key, value ) {
  		var stored;

  		// In cases where either:
  		//
  		//   1. No key was specified
  		//   2. A string key was specified, but no value provided
  		//
  		// Take the "read" path and allow the get method to determine
  		// which value to return, respectively either:
  		//
  		//   1. The entire cache object
  		//   2. The data stored at the key
  		//
  		if ( key === undefined ||

  				( ( key && typeof key === "string" ) && value === undefined ) ) {

  
  			stored = this.get( owner, key );
  
  			return stored !== undefined ?

  				stored : this.get( owner, jQuery.camelCase( key ) );

  		}
  

  		// When the key is not a string, or both a key and value

  		// are specified, set or extend (existing objects) with either:
  		//
  		//   1. An object of properties
  		//   2. A key and value
  		//
  		this.set( owner, key, value );
  
  		// Since the "set" path can have two possible entry points
  		// return the expected data based on which path was taken[*]
  		return value !== undefined ? value : key;
  	},
  	remove: function( owner, key ) {
  		var i, name, camel,

  			cache = owner[ this.expando ];
  
  		if ( cache === undefined ) {
  			return;
  		}

  
  		if ( key === undefined ) {

  			this.register( owner );

  
  		} else {

  			// Support array or space separated string of keys
  			if ( jQuery.isArray( key ) ) {

  				// If "name" is an array of keys...
  				// When data is initially created, via ("key", "val") signature,
  				// keys will be converted to camelCase.
  				// Since there is no way to tell _how_ a key was added, remove
  				// both plain key and camelCase key. #12786
  				// This will only penalize the array argument path.
  				name = key.concat( key.map( jQuery.camelCase ) );
  			} else {
  				camel = jQuery.camelCase( key );

  				// Try the string as a key before any manipulation
  				if ( key in cache ) {
  					name = [ key, camel ];
  				} else {

  					// If a key with the spaces exists, use it.
  					// Otherwise, create an array by matching non-whitespace
  					name = camel;
  					name = name in cache ?
  						[ name ] : ( name.match( rnotwhite ) || [] );
  				}
  			}
  
  			i = name.length;

  			while ( i-- ) {
  				delete cache[ name[ i ] ];
  			}
  		}

  
  		// Remove the expando if there's no more data
  		if ( key === undefined || jQuery.isEmptyObject( cache ) ) {
  
  			// Support: Chrome <= 35-45+
  			// Webkit & Blink performance suffers when deleting properties
  			// from DOM nodes, so set to undefined instead
  			// https://code.google.com/p/chromium/issues/detail?id=378607
  			if ( owner.nodeType ) {
  				owner[ this.expando ] = undefined;
  			} else {
  				delete owner[ this.expando ];
  			}
  		}

  	},
  	hasData: function( owner ) {

  		var cache = owner[ this.expando ];
  		return cache !== undefined && !jQuery.isEmptyObject( cache );

  	}
  };
  
  return Data;

  } );