Tree.SelectionManager=Class.create();Tree.SelectionManager.prototype={initialize:function(tree){this.tree=tree;if(!this.tree.disableKeyboardNavigation){this.eventKeyDown=this.processKeyDown.bindAsEventListener(this);Event.observe(document,"keydown",this.eventKeyDown);}
this.eventLostFocus=this.processLostFocus.bindAsEventListener(this);Event.observe(document,"click",this.eventLostFocus);this.eventPreventLostFocus=this.processPreventLostFocus.bindAsEventListener(this);Event.observe(this.tree.element,"click",this.eventPreventLostFocus);},destroy:function(){this.activeItem=null;this.tree=null;if(this.eventKeyDown){Event.stopObserving(document,"keydown",this.eventKeyDown);}
Event.stopObserving(document,"click",this.eventLostFocus);},restoreSelection:function(){if(this.tree.input.value)
{var e=$(this.tree.input.value);if(e)
{this.inFocus=true;this.setSelection(e.object);}}},processPreventLostFocus:function(event){if(Richfaces.eventIsSynthetic(event)){return;}
this.inFocus=true;this.preventLostFocus=true;},processLostFocus:function(event){if(Richfaces.eventIsSynthetic(event)){return;}
if(!this.preventLostFocus){this.lostFocus();}else{this.preventLostFocus=false;}},lostFocus:function(){this.inFocus=false;},setSelection:function(item){item.toggleSelection();this.activeItem=item;},processKeyDown:function(event){if(!this.activeItem)return;if(!($(this.activeItem.id))){this.activeItem=null;this.tree.input.value="";return;}
var noDefault=false;var key=event.keyCode||event.charCode;switch(key){case Event.KEY_UP:if(this.inFocus){if(!event.ctrlKey&&!event.shiftKey&&!event.altKey){var item=this.activeItem;do{var newItem=this.getPreviousItemForSelection(item);if(newItem&&newItem!=item){item=newItem;if(item.toggleSelection(event)){this.activeItem=item;item=null;}}else{item=null;}}while(item);}
noDefault=true;}
break;case Event.KEY_DOWN:if(this.inFocus){if(!event.ctrlKey&&!event.shiftKey&&!event.altKey){var item=this.activeItem;do{var newItem=this.getNextItemForSelection(item);if(newItem&&newItem!=item){item=newItem;if(item.toggleSelection(event)){this.activeItem=item;item=null;}}else{item=null;}}while(item);}
noDefault=true;}
break;case Event.KEY_LEFT:if(this.inFocus){if(!event.ctrlKey&&!event.shiftKey&&!event.altKey&&!this.activeItem.isLeaf()){this.activeItem.collapse();}
noDefault=true;}
break;case Event.KEY_RIGHT:if(this.inFocus){if(!event.ctrlKey&&!event.shiftKey&&!event.altKey&&!this.activeItem.isLeaf()){this.activeItem.expand();}
noDefault=true;}
break;case Event.KEY_TAB:this.lostFocus();}
if(noDefault){if(event.preventBubble)event.preventBubble();Event.stop(event);}},getNextItemForSelection:function(item){if(!item.isCollapsed()&&item.hasChilds()){return item.childs.first();}else{var next=item.next();if(next!=item){return next;}else{var parentItem=item.parent;while(parentItem&&parentItem!=this.tree){var next=parentItem.next();if(next!=parentItem){return next;}else{parentItem=parentItem.parent;}}
return item;}}},getPreviousItemForSelection:function(item){var prev=item.previous();if(prev==item){if(item.parent!=this.tree&&item.parent){prev=item.parent;}}else if(!prev.isCollapsed()&&prev.hasChilds()){prev=prev.childs.last();while(!prev.isCollapsed()&&prev.hasChilds()){prev=prev.childs.last();}}
return prev;}}