Bug 296728 [CommonNavigator] Problem with enablement on navigatorContent extension point
If I use the enablement node with the expression "WITH", no variable was found because no real context is given. example : <extension point="org.eclipse.ui.navigator.navigatorContent"> <commonWizard type="new" wizardId="com.mywizard"> <enablement> <with variable="activeWorkbenchWindow.activePerspective"> <equals value="com.myperpective"> </equals> </with> </enablement> </commonWizard> make this error : org.eclipse.core.runtime.CoreException: The variable activeWorkbenchWindow.activePerspective is not defined at org.eclipse.core.internal.expressions.WithExpression.evaluate(WithExpression.java:65) at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53) at org.eclipse.core.internal.expressions.EnablementExpression.evaluate(EnablementExpression.java:53) at org.eclipse.ui.internal.navigator.wizards.CommonWizardDescriptor.isEnabledFor(CommonWizardDescriptor.java:145) at org.eclipse.ui.internal.navigator.wizards.CommonWizardDescriptorManager.getEnabledCommonWizardDescriptors(CommonWizardDescriptorManager.java:158) at org.eclipse.ui.navigator.WizardActionGroup.setContext(WizardActionGroup.java:193) at org.eclipse.ui.internal.navigator.resources.actions.NewActionProvider.fillContextMenu(NewActionProvider.java:107) You could do use the currentState of the IEvaluationService. (see WorkbenchWindow line 3035)
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptor.java
if(aSelection.isEmpty()) {
			return false;
		}
		for (Iterator iter = aSelection.iterator(); iter.hasNext();) {
			Object element = iter.next();
			if(!isPossibleChild(element)) {
				return false;
			}
		}
		return true;
	}
	/**
	 * 
	 * Does not force the creation of the set of overriding extensions.
	 * 
	 * @return True if this extension has overriding extensions.
	 */
	public boolean hasOverridingExtensions() {
		return overridingExtensions != null && overridingExtensions.size() > 0;
	}
	/**
	 * @return The set of overriding extensions (of type
	 *         {@link INavigatorContentDescriptor}
	 */
	public Set getOverriddingExtensions() {
		if (overridingExtensions == null) {
			overridingExtensions = new TreeSet(ExtensionPriorityComparator.DESCENDING);
		}
		return overridingExtensions;
	}