silk.navigation = ( xb.core.object.extend( {

		ctor: function( domNode ) {
			this.__init( domNode );			
		},

		handle: function( path, handler ) {
			this.handlers.push( {
				path: path,
				handler: handler
			} );
		},


		goto: function( path, state, evt ) {
			var hObject = this.__getHandlerObject( path );
			if ( hObject !== null ) {
				var state = ( typeof( state ) === "object" && state !== null ) ? state : {};
				console.log( "silk.navigation.goto", path, state );
				if ( typeof( evt ) !== "undefined" ) {
					evt.preventDefault();
					evt.stopImmediatePropagation();
				}

				//var inEditMode = ( document.body.getAttribute( "data-simply-edit" ) !== null );
				var a = document.createElement( "a" );
				a.href = path;
				history.pushState( state, "", a.href );

				hObject.handler( path );
				return true;
			}
			return false;
		},

		__init: function( domNode ) {
			var self = this;
			this.handlers = [];
			this.domNode = domNode;
			this.domNode.addEventListener( "click", function( evt ) { return self.__onClick( evt ); }, true );
			this.domNode.addEventListener( "dblclick", function( evt ) { return self.__onDblClick( evt ); }, true );
			window.addEventListener( "popstate", function( evt ) { return self.__onHistoryBack( evt ); }, true );
		},

		__getHandlerObject: function( pathname ) {
			var result = null;
			var pathname = ( pathname[ 0 ] === "/" ) ? pathname : "/" + pathname;
			for ( var i = 0, il = this.handlers.length; i < il; i++ ) {
				var hInfo = this.handlers[ i ];
				if ( typeof( hInfo.path ) === "string" ) {
					if ( pathname.indexOf( hInfo.path ) === 0 ) {
						result = hInfo;
						break;
					}
				}
			}
			return result;
		},

		__onClick: function( evt ) {
			var inEditMode = ( document.body.getAttribute( "data-simply-edit" ) !== null );
			var tag = evt.target.tagName.toLowerCase();
			if ( !inEditMode && tag === "a" ) {
				if ( !$( evt.target ).hasClass( "nonav" ) && ( $( evt.target ).parents( ".nonav" ).length === 0 ) ) {
					var path = evt.target.pathname;
					return this.goto( path, null, evt );
				}
			}
		},

		__onDblClick: function( evt ) {
			var inEditMode = ( document.body.getAttribute( "data-simply-edit" ) !== null );
			var tag = evt.target.tagName.toLowerCase();
			if ( inEditMode && tag === "a" && !$( evt.target ).hasClass( "nonav" ) ) {
				var path = evt.target.pathname;
				return this.goto( path, null, evt );
			}
		},

		__onHistoryBack: function( evt ) {
			console.log( "popstate", window.location.href, history );
			var hObject = this.__getHandlerObject( window.location.pathname );
			if ( hObject !== null ) {
				evt.preventDefault();
				evt.stopImmediatePropagation();
				hObject.handler( evt.target );
				return false;
			}
		}

	} ) )( document );