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/actions/CommonActionProviderDescriptor.java
return false;
		} else if (!visibilityId.equals(other.visibilityId))
			return false;
		return true;
	} 
	
	 
	protected void addDependentDescriptor(
			CommonActionProviderDescriptor dependentDescriptor) {
		Assert.isTrue(this != dependentDescriptor);
		if (dependentDescriptors == null) {
			dependentDescriptors = new LinkedHashSet();
		}
		dependentDescriptors.add(dependentDescriptor);
	}
	protected void addOverridingDescriptor(
			CommonActionProviderDescriptor overridingDescriptor) {
		Assert.isTrue(this != overridingDescriptor);
		if (overridingDescriptors == null) {
			overridingDescriptors = new TreeSet(CommonActionProviderDescriptorCompator.INSTANCE);
		}
		overridingDescriptors.add(overridingDescriptor);
	}
	protected boolean hasDependentDescriptors() {
		return dependentDescriptors != null && !dependentDescriptors.isEmpty();
	}
	protected boolean hasOverridingDescriptors() {
		return overridingDescriptors != null
				&& !overridingDescriptors.isEmpty();
	}