Bug 3733 'close project' not available in the package view (1GEHFLT)
AK (5/29/01 12:05:55 PM) should the 'close project' action be available also in the package view? NOTES: EG (5/29/01 5:31:26 PM) not for June EG (7/12/01 2:23:28 PM) this requires JavaModel support so that closed projects show up in the UI. Otherwise closing a project makes it disappear.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerActionGroup.java
private boolean isNewTarget(IJavaElement element) {
		if (element == null)
			return false;
		int type= element.getElementType();
		return type == IJavaElement.JAVA_PROJECT ||
			type == IJavaElement.PACKAGE_FRAGMENT_ROOT || 
			type == IJavaElement.PACKAGE_FRAGMENT ||
			type == IJavaElement.COMPILATION_UNIT ||
			type == IJavaElement.TYPE;
	}
	
	private boolean isGoIntoTarget(Object element) {
		if (element == null)
			return false;
		if (element instanceof IJavaElement) {
			int type= ((IJavaElement)element).getElementType();
			return type == IJavaElement.JAVA_PROJECT || 
				type == IJavaElement.PACKAGE_FRAGMENT_ROOT || 
				type == IJavaElement.PACKAGE_FRAGMENT;
		}
		return false;
	}
	private void addOpenNewWindowAction(IMenuManager menu, Object element) {
		if (element instanceof IJavaElement) {
			try {
				element= ((IJavaElement)element).getCorrespondingResource();
			} catch(JavaModelException e) {
			}
		}
		if (!(element instanceof IContainer))