| /******************************************************************************* |
| * Copyright (c) 2007, 2012 Wind River Systems 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: |
| * Wind River Systems - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.dsf.debug.ui.viewmodel.expression; |
| |
| import java.util.Map; |
| |
| import org.eclipse.cdt.dsf.concurrent.CountingRequestMonitor; |
| import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor; |
| import org.eclipse.cdt.dsf.concurrent.RequestMonitor; |
| import org.eclipse.cdt.dsf.ui.viewmodel.DefaultVMModelProxyStrategy; |
| import org.eclipse.cdt.dsf.ui.viewmodel.IVMNode; |
| import org.eclipse.cdt.dsf.ui.viewmodel.VMDelta; |
| import org.eclipse.debug.core.model.IExpression; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta; |
| import org.eclipse.jface.viewers.TreePath; |
| |
| /** |
| * The IModelProxy implementation to be used with an expression |
| * view model provider. |
| * |
| * @see ExpressionVMProvider |
| */ |
| public class ExpressionVMProviderModelProxyStrategy extends DefaultVMModelProxyStrategy { |
| |
| public ExpressionVMProviderModelProxyStrategy(ExpressionVMProvider provider, Object rootElement) { |
| super(provider, rootElement); |
| } |
| |
| private ExpressionVMProvider getExpressionVMProvider() { |
| return (ExpressionVMProvider) getVMProvider(); |
| } |
| |
| public int getDeltaFlagsForExpression(IExpression expression, Object event) { |
| final IExpressionVMNode matchingNode = getExpressionVMProvider().findNodeToParseExpression(null, expression); |
| |
| if (matchingNode != null) { |
| return getNodeDeltaFlagsForExpression(matchingNode, expression, event); |
| } |
| return IModelDelta.NO_CHANGE; |
| } |
| |
| private int getNodeDeltaFlagsForExpression(IExpressionVMNode node, IExpression expression, Object event) { |
| int flags = node.getDeltaFlagsForExpression(expression, event); |
| |
| IExpressionVMNode matchingNode = getExpressionVMProvider().findNodeToParseExpression(node, expression); |
| if (matchingNode != null && !matchingNode.equals(node)) { |
| flags = flags | getNodeDeltaFlagsForExpression(matchingNode, expression, event); |
| } else { |
| // Check the child nodes of this expression node for additional |
| // delta flags. |
| for (IVMNode childNode : getVMProvider().getChildVMNodes(node)) { |
| if (!childNode.equals(node)) { |
| int childNodeDeltaFlags = getDeltaFlags(childNode, null, event); |
| if ((childNodeDeltaFlags & IModelDelta.CONTENT) != 0) { |
| childNodeDeltaFlags &= ~IModelDelta.CONTENT; |
| childNodeDeltaFlags |= IModelDelta.STATE; |
| } |
| flags |= childNodeDeltaFlags; |
| } |
| } |
| } |
| return flags; |
| } |
| |
| public void buildDeltaForExpression(IExpression expression, int expressionElementIdx, Object event, |
| VMDelta parentDelta, TreePath path, RequestMonitor rm) { |
| final IExpressionVMNode matchingNode = getExpressionVMProvider().findNodeToParseExpression(null, expression); |
| |
| if (matchingNode != null) { |
| buildNodeDeltaForExpression(matchingNode, expression, expressionElementIdx, event, parentDelta, path, rm); |
| } else { |
| rm.done(); |
| } |
| } |
| |
| private void buildNodeDeltaForExpression(final IExpressionVMNode node, final IExpression expression, |
| final int expressionElementIdx, final Object event, final VMDelta parentDelta, final TreePath path, |
| final RequestMonitor rm) { |
| node.buildDeltaForExpression(expression, expressionElementIdx, event, parentDelta, path, |
| new RequestMonitor(getVMProvider().getExecutor(), rm) { |
| @Override |
| protected void handleSuccess() { |
| final IExpressionVMNode matchingNode = getExpressionVMProvider().findNodeToParseExpression(node, |
| expression); |
| if (matchingNode != null && !matchingNode.equals(node)) { |
| buildNodeDeltaForExpression(matchingNode, expression, expressionElementIdx, event, |
| parentDelta, path, rm); |
| } else { |
| getExpressionVMProvider().update( |
| new VMExpressionUpdate(parentDelta, getVMProvider().getPresentationContext(), |
| expression, new DataRequestMonitor<>(getVMProvider().getExecutor(), rm) { |
| @Override |
| protected void handleSuccess() { |
| buildDeltaForExpressionElement(node, expression, getData(), |
| expressionElementIdx, event, parentDelta, path, rm); |
| } |
| |
| @Override |
| protected void handleErrorOrWarning() { |
| // Avoid propagating the error to avoid processing the delta by |
| // all nodes. |
| rm.done(); |
| } |
| })); |
| } |
| } |
| }); |
| } |
| |
| private void buildDeltaForExpressionElement(IExpressionVMNode node, IExpression expression, |
| Object expressionElement, int expressionElementIdx, Object event, VMDelta parentDelta, TreePath path, |
| RequestMonitor rm) { |
| CountingRequestMonitor multiRm = new CountingRequestMonitor(getVMProvider().getExecutor(), rm); |
| int multiRmCount = 0; |
| |
| node.buildDeltaForExpressionElement(expressionElement, expressionElementIdx, event, parentDelta, multiRm); |
| multiRmCount++; |
| |
| // Find the child nodes that have deltas for the given event. |
| Map<IVMNode, Integer> childNodesWithDeltaFlags = getChildNodesWithDeltaFlags(node, parentDelta, event); |
| |
| // If no child layout nodes have deltas we can stop here. |
| if (childNodesWithDeltaFlags.size() != 0) { |
| callChildNodesToBuildDelta(node, childNodesWithDeltaFlags, |
| parentDelta.addNode(expressionElement, expressionElementIdx, IModelDelta.NO_CHANGE), event, |
| multiRm); |
| multiRmCount++; |
| } |
| |
| if (event instanceof ExpressionsChangedEvent) { |
| buildDeltaForExpressionsChangedEvent(expressionElement, expressionElementIdx, |
| (ExpressionsChangedEvent) event, parentDelta, multiRm); |
| multiRmCount++; |
| } |
| |
| multiRm.setDoneCount(multiRmCount); |
| } |
| |
| private void buildDeltaForExpressionsChangedEvent(Object element, int elementIdx, ExpressionsChangedEvent event, |
| VMDelta parentDelta, final RequestMonitor rm) { |
| switch (event.getType()) { |
| case ADDED: |
| // New expressions are always added one element before last. |
| // Last element is the "Add new expression" element. |
| // Note: Index should be calculated when the IExpressionListener.expressionsAdded |
| // is called. If it's not, try to calculate it here based on parent count. |
| int parentCount = parentDelta.getChildCount(); |
| if (elementIdx == -1 && parentCount > 1) { |
| elementIdx = parentCount - 2; |
| } |
| parentDelta.addNode(element, elementIdx, IModelDelta.ADDED); |
| break; |
| case CHANGED: |
| parentDelta.setFlags(parentDelta.getFlags() | IModelDelta.CONTENT); |
| break; |
| case MOVED: |
| parentDelta.addNode(element, -1, IModelDelta.REMOVED); |
| parentDelta.addNode(element, elementIdx, IModelDelta.INSERTED); |
| break; |
| case REMOVED: |
| parentDelta.addNode(element, -1, IModelDelta.REMOVED); |
| break; |
| case INSERTED: |
| parentDelta.addNode(element, elementIdx, IModelDelta.INSERTED); |
| break; |
| default: |
| break; |
| } |
| rm.done(); |
| } |
| } |