| /******************************************************************************* |
| * Copyright (c) 2004, 2011 Mylyn project committers and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.cdt.ui; |
| |
| import org.eclipse.cdt.core.model.ElementChangedEvent; |
| import org.eclipse.cdt.core.model.ICElement; |
| import org.eclipse.cdt.core.model.ICElementDelta; |
| import org.eclipse.cdt.core.model.IElementChangedListener; |
| import org.eclipse.cdt.core.model.ITranslationUnit; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.mylyn.commons.core.StatusHandler; |
| import org.eclipse.mylyn.context.core.ContextCore; |
| import org.eclipse.mylyn.context.core.IInteractionElement; |
| import org.eclipse.ui.IWorkbench; |
| import org.eclipse.ui.PlatformUI; |
| |
| /** |
| * @author Mik Kersten |
| * @author Jeff Johnston |
| */ |
| public class InterestUpdateDeltaListener implements IElementChangedListener { |
| |
| private static boolean asyncExecMode = true; |
| |
| public void elementChanged(ElementChangedEvent event) { |
| ICElementDelta delta = event.getDelta(); |
| handleDelta(delta.getAffectedChildren()); |
| } |
| |
| /** |
| * Only handles first addition/removal |
| */ |
| private void handleDelta(ICElementDelta[] delta) { |
| try { |
| ICElement added = null; |
| ICElement removed = null; |
| for (ICElementDelta child : delta) { |
| if (child.getElement() instanceof ITranslationUnit) { |
| // FIXME: not sure I modified this correctly from the java version |
| if (((ITranslationUnit) child.getElement()).getParent() != null) { |
| // see bug 195361, do not reduce interest of temporary working copy |
| return; |
| } |
| } |
| |
| if (child.getKind() == ICElementDelta.ADDED) { |
| if (added == null) { |
| added = child.getElement(); |
| } |
| } else if (child.getKind() == ICElementDelta.REMOVED) { |
| if (removed == null) { |
| removed = child.getElement(); |
| } |
| } |
| handleDelta(child.getAffectedChildren()); |
| } |
| |
| if (added != null && removed != null) { |
| IInteractionElement element = ContextCore.getContextManager().getElement( |
| CDTStructureBridge.getHandleForElement(removed)); |
| if (element != null) { |
| resetHandle(element, CDTStructureBridge.getHandleForElement(added)); |
| } |
| } else if (removed != null) { |
| |
| IInteractionElement element = ContextCore.getContextManager().getElement( |
| CDTStructureBridge.getHandleForElement(removed)); |
| if (element != null) { |
| delete(element); |
| } |
| } |
| } catch (Throwable t) { |
| StatusHandler.log(new Status(IStatus.ERROR, CDTUIBridgePlugin.ID_PLUGIN, |
| "Unexpected error while updating interest", t)); //$NON-NLS-1$ |
| } |
| } |
| |
| private void resetHandle(final IInteractionElement element, final String newHandle) { |
| if (!asyncExecMode) { |
| ContextCore.getContextManager().updateHandle(element, newHandle); |
| } else { |
| IWorkbench workbench = PlatformUI.getWorkbench(); |
| if (workbench != null) { |
| workbench.getDisplay().asyncExec(new Runnable() { |
| public void run() { |
| ContextCore.getContextManager().updateHandle(element, newHandle); |
| } |
| }); |
| } |
| } |
| } |
| |
| private void delete(final IInteractionElement element) { |
| if (!asyncExecMode) { |
| ContextCore.getContextManager().deleteElement(element); |
| } else { |
| IWorkbench workbench = PlatformUI.getWorkbench(); |
| if (workbench != null) { |
| workbench.getDisplay().asyncExec(new Runnable() { |
| public void run() { |
| ContextCore.getContextManager().deleteElement(element); |
| } |
| }); |
| } |
| } |
| } |
| |
| /** |
| * For testing |
| */ |
| public static void setAsyncExecMode(boolean asyncExecMode) { |
| InterestUpdateDeltaListener.asyncExecMode = asyncExecMode; |
| } |
| } |