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/sorters/CommonSorterDescriptor.java
parentExpression = new CustomAndExpression(children[0]);
		}
	}
	/**
	 * 
	 * @return An identifier used to determine whether the sorter is visible.
	 *         May not be unique.
	 */
	public String getId() {
		return id;
	}
 
	/**
	 * 
	 * @param aParent
	 *            An element from the viewer
	 * @return True if and only if this CommonSorter can sort the children of
	 *         the given parent.
	 */
	public boolean isEnabledForParent(Object aParent) {
		if(aParent == null) {
			return false;
		}
		if (parentExpression != null) {
			EvaluationContext context = new EvaluationContext(null, aParent);
			context.setAllowPluginActivation(true);
			try {
				return parentExpression.evaluate(context) == EvaluationResult.TRUE;
			} catch (CoreException e) {
				NavigatorPlugin.logError(0, e.getMessage(), e);