Bug 343295 Maximize throws NPE if no editor area or perspectives
java.lang.NullPointerException at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.match(ModelServiceImpl.java:63) at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.findElementsRecursive(ModelServiceImpl.java:86) at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.findElements(ModelServiceImpl.java:165) at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.find(ModelServiceImpl.java:201) at org.eclipse.e4.ui.workbench.addons.minmax.MinMaxAddon.maximize(MinMaxAddon.java:421) at org.eclipse.e4.ui.workbench.addons.minmax.MinMaxAddon$5.handleEvent(MinMaxAddon.java:246) at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:41) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:179) at org.eclipse.swt.widgets.Display.syncExec(Display.java:4681) at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:182) at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38) at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:81) at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:380) at org.eclipse.emf.ecore.util.EcoreEList.dispatchNotification(EcoreEList.java:255) at org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:310) at org.eclipse.emf.common.util.AbstractEList.add(AbstractEList.java:307) at org.eclipse.e4.ui.workbench.addons.minmax.MinMaxAddon.setState(MinMaxAddon.java:173) at org.eclipse.e4.ui.workbench.addons.minmax.MinMaxAddon.access$0(MinMaxAddon.java:159) at org.eclipse.e4.ui.workbench.addons.minmax.MinMaxAddon$1.maximize(MinMaxAddon.java:87) at org.eclipse.e4.ui.widgets.CTabFolder.onSelection(CTabFolder.java:1915) at org.eclipse.e4.ui.widgets.CTabFolder$1.handleEvent(CTabFolder.java:275)
bundles/org.eclipse.e4.ui.workbench.addons.swt/src/org/eclipse/e4/ui/workbench/addons/minmax/MinMaxAddon.java
}
				}
				
				MPlaceholder eaPlaceholder = (MPlaceholder) modelService.find(ID_EDITOR_AREA,
						curPersp);
				adjustCTFButtons(eaPlaceholder);
			}
			
			if (event.getProperty(EventTags.OLD_VALUE) instanceof MPerspective) {
				MPerspective oldPersp = (MPerspective) event.getProperty(EventTags.OLD_VALUE);
				String perspId = '(' + oldPersp.getElementId() + ')';
				for (MToolControl tc : tcList) {
					if (tc.getObject() instanceof TrimStack && tc.getElementId().contains(perspId)) {
						TrimStack ts = (TrimStack) tc.getObject();
						ts.showStack(false);
						tc.setVisible(false);
					}
				}
			}
			final Shell winShell = (Shell) window.getWidget();
			winShell.getDisplay().asyncExec(new Runnable() {
				public void run() {
					winShell.layout(true, true);
				}
			});
		}
	};
	private EventHandler tagChangeListener = new EventHandler() {
		public void handleEvent(Event event) {
			Object changedObj = event.getProperty(EventTags.ELEMENT);