| /******************************************************************************* |
| * Copyright (c) 2004, 2008 Tasktop Technologies 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 |
| * |
| * Contributors: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.dltk.internal.mylyn; |
| |
| import java.util.Iterator; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.dltk.core.IMethod; |
| import org.eclipse.dltk.core.IModelElement; |
| import org.eclipse.dltk.core.IPackageDeclaration; |
| import org.eclipse.dltk.core.IType; |
| import org.eclipse.dltk.core.ModelException; |
| import org.eclipse.dltk.internal.mylyn.search.DLTKImplementorsProvider; |
| import org.eclipse.dltk.internal.mylyn.search.DLTKReferencesProvider; |
| import org.eclipse.dltk.internal.ui.actions.SelectionConverter; |
| import org.eclipse.jface.text.TextSelection; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.mylyn.commons.core.StatusHandler; |
| import org.eclipse.mylyn.monitor.ui.AbstractUserInteractionMonitor; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.IWorkbenchPart; |
| |
| /** |
| * @author Mik Kersten |
| */ |
| public class DLTKEditingMonitor extends AbstractUserInteractionMonitor { |
| |
| protected IModelElement lastSelectedElement = null; |
| |
| protected IModelElement lastResolvedElement = null; |
| |
| protected IEditorPart currentEditor; |
| |
| protected StructuredSelection currentSelection = null; |
| |
| public DLTKEditingMonitor() { |
| super(); |
| } |
| |
| /** |
| * Only public for testing. Note: Two sequential selections on the same element are deemed to be an edit of the |
| * selection as this is the best guess that can be made. See bug 252306. |
| */ |
| @Override |
| public void handleWorkbenchPartSelection(IWorkbenchPart part, ISelection selection, boolean contributeToContext) { |
| try { |
| IModelElement selectedElement = null; |
| if (selection instanceof StructuredSelection) { |
| StructuredSelection structuredSelection = (StructuredSelection) selection; |
| |
| if (structuredSelection.equals(currentSelection)) { |
| return; |
| } |
| currentSelection = structuredSelection; |
| |
| for (Iterator<?> iterator = structuredSelection.iterator(); iterator.hasNext();) { |
| Object selectedObject = iterator.next(); |
| if (selectedObject instanceof IModelElement) { |
| IModelElement checkedElement = checkIfAcceptedAndPromoteIfNecessary( |
| (IModelElement) selectedObject); |
| if (checkedElement == null) { |
| return; |
| } else { |
| selectedElement = checkedElement; |
| } |
| } |
| if (selectedElement != null) { |
| super.handleElementSelection(part, selectedElement, contributeToContext); |
| } |
| } |
| } else { |
| if (selection instanceof TextSelection && part instanceof IEditorPart) { |
| currentEditor = (IEditorPart) part; |
| TextSelection textSelection = (TextSelection) selection; |
| selectedElement = SelectionConverter.resolveEnclosingElement(currentEditor, textSelection); |
| if (selectedElement instanceof IPackageDeclaration) { |
| // HACK: ignoring these selections |
| return; |
| } |
| IModelElement[] resolved = SelectionConverter.codeResolve(currentEditor); |
| if (resolved != null && resolved.length == 1 && !resolved[0].equals(selectedElement)) { |
| lastResolvedElement = resolved[0]; |
| } |
| |
| boolean selectionResolved = false; |
| if (selectedElement instanceof IMethod && lastSelectedElement instanceof IMethod) { |
| // navigation between two elements |
| if (lastResolvedElement != null && lastSelectedElement != null |
| && lastResolvedElement.equals(selectedElement) |
| && !lastSelectedElement.equals(lastResolvedElement)) { |
| super.handleNavigation(part, selectedElement, DLTKReferencesProvider.ID, |
| contributeToContext); |
| selectionResolved = true; |
| } else if (lastSelectedElement != null && lastSelectedElement.equals(lastResolvedElement) |
| && !lastSelectedElement.equals(selectedElement)) { |
| super.handleNavigation(part, selectedElement, DLTKReferencesProvider.ID, |
| contributeToContext); |
| selectionResolved = true; |
| } |
| } else if (selectedElement != null && lastSelectedElement != null |
| && !lastSelectedElement.equals(selectedElement)) { |
| if (lastSelectedElement.getElementName().equals(selectedElement.getElementName())) { |
| // navigation between two elements |
| if (selectedElement instanceof IMethod && lastSelectedElement instanceof IMethod) { |
| super.handleNavigation(part, selectedElement, DLTKImplementorsProvider.ID, |
| contributeToContext); |
| selectionResolved = true; |
| } else if (selectedElement instanceof IType && lastSelectedElement instanceof IType) { |
| super.handleNavigation(part, selectedElement, DLTKImplementorsProvider.ID, |
| contributeToContext); |
| selectionResolved = true; |
| } |
| } |
| } |
| if (selectedElement != null) { |
| // selection of an element |
| if (!selectionResolved && selectedElement.equals(lastSelectedElement)) { |
| // we no longer produce edit events from here. See bug 371222 http://eclip.se/371222 |
| //super.handleElementEdit(part, selectedElement, contributeToContext); |
| } else if (!selectedElement.equals(lastSelectedElement)) { |
| super.handleElementSelection(part, selectedElement, contributeToContext); |
| } |
| } |
| |
| IModelElement checkedElement = checkIfAcceptedAndPromoteIfNecessary(selectedElement); |
| if (checkedElement == null) { |
| return; |
| } else { |
| selectedElement = checkedElement; |
| } |
| } |
| } |
| if (selectedElement != null) { |
| lastSelectedElement = selectedElement; |
| } |
| } catch (ModelException e) { |
| // ignore, fine to fail to resolve an element if the model is not up-to-date |
| } catch (Throwable t) { |
| StatusHandler.log(new Status(IStatus.ERROR, DLTKUiBridgePlugin.ID_PLUGIN, |
| "Failed to update model based on selection", t)); //$NON-NLS-1$ |
| } |
| } |
| |
| /** |
| * @return null for elements that aren't modeled |
| */ |
| protected IModelElement checkIfAcceptedAndPromoteIfNecessary(IModelElement element) { |
| // if (element instanceof IPackageDeclaration) return null; |
| // if (element instanceof IImportContainer) { |
| // return element.getParent(); |
| // } else if (element instanceof IImportDeclaration) { |
| // return element.getParent().getParent(); |
| // } else { |
| return element; |
| // } |
| } |
| } |