| /******************************************************************************* |
| * Copyright (c) 2008, 2015 Wind River Systems, Inc. and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Anton Leherbauer (Wind River Systems) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.dsf.debug.ui.viewmodel.launch; |
| |
| import java.util.concurrent.ExecutionException; |
| |
| import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor; |
| import org.eclipse.cdt.dsf.concurrent.ImmediateExecutor; |
| import org.eclipse.cdt.dsf.concurrent.Query; |
| import org.eclipse.cdt.dsf.datamodel.DMContexts; |
| import org.eclipse.cdt.dsf.datamodel.IDMContext; |
| import org.eclipse.cdt.dsf.debug.service.IRunControl; |
| import org.eclipse.cdt.dsf.debug.service.IRunControl.IContainerDMContext; |
| import org.eclipse.cdt.dsf.debug.service.IRunControl.IExecutionDMContext; |
| import org.eclipse.cdt.dsf.debug.service.IRunControl.IExecutionDMData; |
| import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext; |
| import org.eclipse.cdt.dsf.internal.ui.DsfUIPlugin; |
| import org.eclipse.cdt.dsf.service.DsfServicesTracker; |
| import org.eclipse.cdt.dsf.service.DsfSession; |
| import org.eclipse.cdt.dsf.ui.viewmodel.datamodel.IDMVMContext; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelSelectionPolicy; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext; |
| import org.eclipse.debug.ui.IDebugUIConstants; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.ITreeSelection; |
| import org.eclipse.jface.viewers.TreePath; |
| import org.eclipse.jface.viewers.TreeSelection; |
| |
| /** |
| * Default DSF selection policy implementation modeled after platform version |
| * (<code>DefaultSelectionPolicy</code>). |
| * @since 1.1 |
| */ |
| public class DefaultDsfSelectionPolicy implements IModelSelectionPolicy { |
| |
| private IDMContext fDMContext; |
| |
| /** |
| * Create selection policy instance for the given data model context. |
| * |
| * @param dmContext |
| */ |
| public DefaultDsfSelectionPolicy(IDMContext dmContext) { |
| fDMContext = dmContext; |
| } |
| |
| /* |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IModelSelectionPolicy#contains(org.eclipse.jface.viewers.ISelection, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext) |
| */ |
| @Override |
| public boolean contains(ISelection selection, IPresentationContext context) { |
| if (IDebugUIConstants.ID_DEBUG_VIEW.equals(context.getId())) { |
| if (selection instanceof IStructuredSelection) { |
| IStructuredSelection ss = (IStructuredSelection) selection; |
| Object element = ss.getFirstElement(); |
| if (element instanceof IDMVMContext) { |
| IDMVMContext dmvmContext = (IDMVMContext) element; |
| IDMContext dmContext = dmvmContext.getDMContext(); |
| if (dmContext != null) { |
| return fDMContext.getSessionId().equals(dmContext.getSessionId()); |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IModelSelectionPolicy#isSticky(org.eclipse.jface.viewers.ISelection, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext) |
| */ |
| @Override |
| public boolean isSticky(ISelection selection, IPresentationContext context) { |
| if (IDebugUIConstants.ID_DEBUG_VIEW.equals(context.getId())) { |
| if (selection instanceof IStructuredSelection) { |
| IStructuredSelection ss = (IStructuredSelection) selection; |
| Object element = ss.getFirstElement(); |
| return isSticky(element); |
| } |
| } |
| return false; |
| } |
| |
| protected boolean isSticky(Object element) { |
| if (element instanceof IDMVMContext) { |
| IDMVMContext dmvmContext = (IDMVMContext) element; |
| final IDMContext dmContext = dmvmContext.getDMContext(); |
| if (dmContext instanceof IFrameDMContext) { |
| final IExecutionDMContext execContext = DMContexts.getAncestorOfType(dmContext, |
| IExecutionDMContext.class); |
| if (execContext != null) { |
| Query<Boolean> query = new Query<>() { |
| @Override |
| protected void execute(DataRequestMonitor<Boolean> rm) { |
| DsfServicesTracker servicesTracker = new DsfServicesTracker(DsfUIPlugin.getBundleContext(), |
| dmContext.getSessionId()); |
| try { |
| IRunControl runControl = servicesTracker.getService(IRunControl.class); |
| if (runControl != null) { |
| rm.setData(runControl.isSuspended(execContext)); |
| } else { |
| rm.setData(false); |
| } |
| } finally { |
| servicesTracker.dispose(); |
| rm.done(); |
| } |
| } |
| }; |
| DsfSession session = DsfSession.getSession(dmContext.getSessionId()); |
| if (session != null) { |
| if (session.getExecutor().isInExecutorThread()) { |
| query.run(); |
| } else { |
| session.getExecutor().execute(query); |
| } |
| try { |
| Boolean result = query.get(); |
| return result != null && result.booleanValue(); |
| } catch (InterruptedException exc) { |
| Thread.currentThread().interrupt(); |
| } catch (ExecutionException exc) { |
| DsfUIPlugin.log(exc); |
| } |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IModelSelectionPolicy#overrides(org.eclipse.jface.viewers.ISelection, org.eclipse.jface.viewers.ISelection, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext) |
| */ |
| @Override |
| public boolean overrides(ISelection existing, ISelection candidate, IPresentationContext context) { |
| if (IDebugUIConstants.ID_DEBUG_VIEW.equals(context.getId())) { |
| if (existing instanceof IStructuredSelection && candidate instanceof IStructuredSelection) { |
| IStructuredSelection ssExisting = (IStructuredSelection) existing; |
| IStructuredSelection ssCandidate = (IStructuredSelection) candidate; |
| return overrides(ssExisting.getFirstElement(), ssCandidate.getFirstElement()); |
| } |
| } |
| return true; |
| } |
| |
| protected boolean overrides(Object existing, Object candidate) { |
| if (existing == null || existing.equals(candidate)) { |
| return true; |
| } |
| if (existing instanceof IDMVMContext && candidate instanceof IDMVMContext) { |
| IDMContext curr = ((IDMVMContext) existing).getDMContext(); |
| IDMContext cand = ((IDMVMContext) candidate).getDMContext(); |
| if (curr instanceof IFrameDMContext && cand instanceof IFrameDMContext) { |
| IExecutionDMContext currExecContext = DMContexts.getAncestorOfType(curr, IExecutionDMContext.class); |
| if (currExecContext != null) { |
| IExecutionDMContext candExecContext = DMContexts.getAncestorOfType(cand, IExecutionDMContext.class); |
| return currExecContext.equals(candExecContext) || !isSticky(existing) |
| || frameOverrides((IFrameDMContext) curr, (IFrameDMContext) cand); |
| } |
| } |
| } |
| return !isSticky(existing); |
| } |
| |
| /** |
| * Last test for whether a stack frame overrides another stack frame. |
| * If two stack frames are from the same execution container (process) and |
| * the entire process has stopped (as in all-stop run control), and the |
| * current frame's thread was stopped due to the container stopping, then |
| * the new frame selection should override the current one. This is because |
| * the new thread is most likely a the thread that triggered the container |
| * to stop. |
| * @param curr Currently selected stack frame. |
| * @param cand Candidate stack frame to be selected. |
| * @return <code>true</code> if the new frame should override current selection. |
| */ |
| private boolean frameOverrides(final IFrameDMContext curr, final IFrameDMContext cand) { |
| // We're assuming that frames are from different execution contexts. |
| |
| // Check if they are from the same container context: |
| final IContainerDMContext currContContext = DMContexts.getAncestorOfType(curr, IContainerDMContext.class); |
| IContainerDMContext candContContext = DMContexts.getAncestorOfType(cand, IContainerDMContext.class); |
| if (currContContext == null || !currContContext.equals(candContContext)) { |
| // If from different containers, frames should not override each other. |
| return false; |
| } |
| |
| Query<Boolean> query = new Query<>() { |
| @Override |
| protected void execute(final DataRequestMonitor<Boolean> rm) { |
| DsfServicesTracker servicesTracker = new DsfServicesTracker(DsfUIPlugin.getBundleContext(), |
| curr.getSessionId()); |
| |
| // Check if container is not suspended. |
| IRunControl runControl = servicesTracker.getService(IRunControl.class); |
| if (runControl != null && runControl.isSuspended(currContContext)) { |
| IExecutionDMContext execDmc = DMContexts.getAncestorOfType(curr, IExecutionDMContext.class); |
| // If container is suspended, check whether the current thread was stopped due |
| // to container suspended event. |
| runControl.getExecutionData(execDmc, |
| new DataRequestMonitor<IExecutionDMData>(ImmediateExecutor.getInstance(), rm) { |
| @Override |
| protected void handleSuccess() { |
| rm.setData(getData() |
| .getStateChangeReason() == IRunControl.StateChangeReason.CONTAINER); |
| rm.done(); |
| } |
| }); |
| } else { |
| // If container is not suspended it's running, then do not override the selection. |
| rm.setData(false); |
| rm.done(); |
| } |
| // In either case, we won't need the services tracker anymore. |
| servicesTracker.dispose(); |
| } |
| }; |
| |
| DsfSession session = DsfSession.getSession(curr.getSessionId()); |
| if (session != null) { |
| if (session.getExecutor().isInExecutorThread()) { |
| query.run(); |
| } else { |
| session.getExecutor().execute(query); |
| } |
| try { |
| Boolean result = query.get(); |
| return result != null && result.booleanValue(); |
| } catch (InterruptedException exc) { |
| Thread.currentThread().interrupt(); |
| } catch (ExecutionException exc) { |
| DsfUIPlugin.log(exc); |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IModelSelectionPolicy#replaceInvalidSelection(org.eclipse.jface.viewers.ISelection, org.eclipse.jface.viewers.ISelection) |
| */ |
| @Override |
| public ISelection replaceInvalidSelection(ISelection invalidSelection, ISelection newSelection) { |
| if (invalidSelection instanceof ITreeSelection) { |
| ITreeSelection treeSelection = (ITreeSelection) invalidSelection; |
| if (treeSelection.getPaths().length == 1) { |
| TreePath path = treeSelection.getPaths()[0]; |
| if (path.getSegmentCount() > 1) { |
| return new TreeSelection(path.getParentPath()); |
| } |
| } |
| } |
| return newSelection; |
| } |
| |
| } |
