| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.compare; |
| |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.ResourceBundle; |
| import java.util.Set; |
| |
| import org.eclipse.swt.events.DisposeEvent; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.ToolBar; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| |
| import org.eclipse.core.resources.IResource; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.action.ActionContributionItem; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.action.ToolBarManager; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| |
| import org.eclipse.compare.CompareConfiguration; |
| import org.eclipse.compare.CompareViewerPane; |
| import org.eclipse.compare.IContentChangeNotifier; |
| import org.eclipse.compare.IResourceProvider; |
| import org.eclipse.compare.ITypedElement; |
| import org.eclipse.compare.structuremergeviewer.DiffNode; |
| import org.eclipse.compare.structuremergeviewer.Differencer; |
| import org.eclipse.compare.structuremergeviewer.ICompareInput; |
| import org.eclipse.compare.structuremergeviewer.IDiffContainer; |
| import org.eclipse.compare.structuremergeviewer.StructureDiffViewer; |
| |
| import org.eclipse.jdt.core.ElementChangedEvent; |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.IElementChangedListener; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaElementDelta; |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.JavaCore; |
| |
| import org.eclipse.jdt.internal.corext.util.JavaModelUtil; |
| |
| |
| // XXX: StructuredDiffViewer should allow subclassing, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=258907 |
| class JavaStructureDiffViewer extends StructureDiffViewer implements IElementChangedListener { |
| |
| /** |
| * Toggles a boolean property of an <code>CompareConfiguration</code>. |
| */ |
| static class ChangePropertyAction extends Action { |
| |
| private CompareConfiguration fCompareConfiguration; |
| private String fPropertyKey; |
| private ResourceBundle fBundle; |
| private String fPrefix; |
| |
| |
| public ChangePropertyAction(ResourceBundle bundle, CompareConfiguration cc, String rkey, String pkey) { |
| fPropertyKey= pkey; |
| fBundle= bundle; |
| fPrefix= rkey; |
| JavaCompareUtilities.initAction(this, fBundle, fPrefix); |
| setCompareConfiguration(cc); |
| } |
| |
| @Override |
| public void run() { |
| boolean b= !JavaCompareUtilities.getBoolean(fCompareConfiguration, fPropertyKey, false); |
| setChecked(b); |
| if (fCompareConfiguration != null) |
| fCompareConfiguration.setProperty(fPropertyKey, Boolean.valueOf(b)); |
| } |
| |
| @Override |
| public void setChecked(boolean state) { |
| super.setChecked(state); |
| JavaCompareUtilities.initToggleAction(this, fBundle, fPrefix, state); |
| } |
| |
| public void setCompareConfiguration(CompareConfiguration cc) { |
| fCompareConfiguration= cc; |
| setChecked(JavaCompareUtilities.getBoolean(fCompareConfiguration, fPropertyKey, false)); |
| } |
| } |
| |
| private static final String SMART= "SMART"; //$NON-NLS-1$ |
| |
| private ActionContributionItem fSmartActionItem; |
| private JavaStructureCreator fStructureCreator; |
| private boolean fThreeWay; |
| |
| public JavaStructureDiffViewer(Composite parent, CompareConfiguration configuration) { |
| super(parent, configuration); |
| fStructureCreator= new JavaStructureCreator(); |
| setStructureCreator(fStructureCreator); |
| JavaCore.addElementChangedListener(this); |
| } |
| |
| /** |
| * Overridden to find and expand the first class. |
| */ |
| @Override |
| protected void initialSelection() { |
| Object firstClass= null; |
| Object o= getRoot(); |
| if (o != null) { |
| Object[] children= getSortedChildren(o); |
| if (children != null && children.length > 0) { |
| for (int i= 0; i < children.length; i++) { |
| o= children[i]; |
| Object[] sortedChildren= getSortedChildren(o); |
| if (sortedChildren != null && sortedChildren.length > 0) { |
| for (int j= 0; j < sortedChildren.length; j++) { |
| o= sortedChildren[j]; |
| if (o instanceof DiffNode) { |
| DiffNode dn= (DiffNode) o; |
| ITypedElement e= dn.getId(); |
| if (e instanceof JavaNode) { |
| JavaNode jn= (JavaNode) e; |
| int tc= jn.getTypeCode(); |
| if (tc == JavaNode.CLASS || tc == JavaNode.INTERFACE) { |
| firstClass= dn; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| if (firstClass != null) |
| expandToLevel(firstClass, 1); |
| else |
| expandToLevel(2); |
| } |
| |
| @Override |
| protected void compareInputChanged(ICompareInput input) { |
| |
| fThreeWay= input != null ? input.getAncestor() != null |
| : false; |
| setSmartButtonVisible(fThreeWay); |
| |
| if (input != null) { |
| Map<String, String> compilerOptions= getCompilerOptions(input.getAncestor()); |
| if (compilerOptions == null) |
| compilerOptions= getCompilerOptions(input.getLeft()); |
| if (compilerOptions == null) |
| compilerOptions= getCompilerOptions(input.getRight()); |
| if (compilerOptions != null) |
| fStructureCreator.setDefaultCompilerOptions(compilerOptions); |
| } |
| |
| super.compareInputChanged(input); |
| } |
| |
| private Map<String, String> getCompilerOptions(ITypedElement input) { |
| IJavaElement element= findJavaElement(input); |
| if (element != null) { |
| IJavaProject javaProject= element.getJavaProject(); |
| if (javaProject != null) |
| return javaProject.getOptions(true); |
| } |
| return null; |
| } |
| |
| /* |
| * @see org.eclipse.compare.structuremergeviewer.StructureDiffViewer#handleDispose(org.eclipse.swt.events.DisposeEvent) |
| * @since 3.5 |
| */ |
| @Override |
| protected void handleDispose(DisposeEvent event) { |
| JavaCore.removeElementChangedListener(this); |
| super.handleDispose(event); |
| } |
| |
| private IJavaElement findJavaElement(ITypedElement element) { |
| if (element instanceof IResourceProvider) { |
| IResource resource= ((IResourceProvider)element).getResource(); |
| if (resource != null) { |
| return JavaCore.create(resource); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Overriden to create a "smart" button in the viewer's pane control bar. |
| * <p> |
| * Clients can override this method and are free to decide whether they want to call |
| * the inherited method. |
| * |
| * @param toolBarManager the toolbar manager for which to add the buttons |
| */ |
| @Override |
| protected void createToolItems(ToolBarManager toolBarManager) { |
| |
| super.createToolItems(toolBarManager); |
| |
| IAction a= new ChangePropertyAction(getBundle(), getCompareConfiguration(), "action.Smart.", SMART); //$NON-NLS-1$ |
| fSmartActionItem= new ActionContributionItem(a); |
| fSmartActionItem.setVisible(fThreeWay); |
| toolBarManager.appendToGroup("modes", fSmartActionItem); //$NON-NLS-1$ |
| } |
| |
| @Override |
| protected void postDiffHook(Differencer differencer, IDiffContainer root, IProgressMonitor monitor) { |
| if (fStructureCreator.canRewriteTree()) { |
| boolean smart= JavaCompareUtilities.getBoolean(getCompareConfiguration(), SMART, false); |
| if (smart && root != null) |
| fStructureCreator.rewriteTree(differencer, root); |
| } |
| } |
| |
| /** |
| * Tracks property changes of the configuration object. Clients may override to track their own |
| * property changes. In this case they must call the inherited method. |
| * |
| * @param event the property change event |
| */ |
| @Override |
| protected void propertyChange(PropertyChangeEvent event) { |
| if (event.getProperty().equals(SMART)) |
| diff(); |
| else |
| super.propertyChange(event); |
| } |
| |
| private void setSmartButtonVisible(boolean visible) { |
| if (fSmartActionItem == null) |
| return; |
| Control c= getControl(); |
| if (c == null || c.isDisposed()) |
| return; |
| |
| fSmartActionItem.setVisible(visible); |
| ToolBarManager tbm= CompareViewerPane.getToolBarManager(c.getParent()); |
| if (tbm != null) { |
| tbm.update(true); |
| ToolBar tb= tbm.getControl(); |
| if (!tb.isDisposed()) |
| tb.getParent().layout(true); |
| } |
| } |
| |
| /* |
| * @see org.eclipse.jdt.core.IElementChangedListener#elementChanged(org.eclipse.jdt.core.ElementChangedEvent) |
| * @since 3.5 |
| */ |
| @Override |
| public void elementChanged(ElementChangedEvent event) { |
| ITypedElement[] elements= findAffectedElement(event); |
| for (int i= 0; i < elements.length; i++) { |
| ITypedElement e= elements[i]; |
| if (e == null || !(e instanceof IContentChangeNotifier)) |
| continue; |
| contentChanged((IContentChangeNotifier)e); |
| } |
| } |
| |
| /** |
| * Tells which elements of the comparison are affected by the change. |
| * |
| * @param event element changed event |
| * @return array of typed elements affected by the event. May return an empty array. |
| * @since 3.5 |
| */ |
| private ITypedElement[] findAffectedElement(ElementChangedEvent event) { |
| Object input= getInput(); |
| if (!(input instanceof ICompareInput)) |
| return new ITypedElement[0]; |
| |
| Set<ITypedElement> affectedElements= new HashSet<>(); |
| ICompareInput ci= (ICompareInput)input; |
| IJavaElementDelta delta= event.getDelta(); |
| addAffectedElement(ci.getAncestor(), delta, affectedElements); |
| addAffectedElement(ci.getLeft(), delta, affectedElements); |
| addAffectedElement(ci.getRight(), delta, affectedElements); |
| |
| return affectedElements.toArray(new ITypedElement[affectedElements.size()]); |
| } |
| |
| /** |
| * Tests whether the given element is affected by the change and if so, adds it to given set. |
| * |
| * @param element the element to test |
| * @param delta the Java element delta |
| * @param affectedElements the set of affected elements |
| * @since 3.5 |
| */ |
| private void addAffectedElement(ITypedElement element, IJavaElementDelta delta, Set<ITypedElement> affectedElements) { |
| IJavaElement javaElement= findJavaElement(element); |
| if (isEditable(javaElement) && findJavaElementDelta(javaElement, delta) != null) |
| affectedElements.add(element); |
| } |
| |
| /** |
| * Tells whether the given Java element can be edited. |
| * |
| * @param javaElement the element to test |
| * @return <code>true</code> if the element can be edited, <code>false</code> otherwise |
| * @since 3.5 |
| */ |
| private boolean isEditable(IJavaElement javaElement) { |
| return (javaElement instanceof ICompilationUnit) && JavaModelUtil.isEditable((ICompilationUnit)javaElement); |
| } |
| |
| /** |
| * Test whether the given delta represents a significant change. |
| * |
| * @param cuDelta the Java element delta |
| * @return <code>true</code> if the delta represents a content change |
| * @since 3.5 |
| */ |
| private boolean isContentChange(IJavaElementDelta cuDelta) { |
| int flags= cuDelta.getFlags(); |
| return flags != IJavaElementDelta.F_AST_AFFECTED && (cuDelta.getKind() == IJavaElementDelta.CHANGED || (flags & IJavaElementDelta.F_CONTENT) != 0); |
| } |
| |
| /** |
| * Check whether the given delta has been sent when saving this reconciler's editor. |
| * |
| * @param cu the compilation unit |
| * @param delta the deltas |
| * @return <code>true</code> if the given delta |
| * @since 3.5 |
| */ |
| private boolean canIgnore(IJavaElement cu, IJavaElementDelta[] delta) { |
| if (delta.length != 1) |
| return false; |
| |
| int flags= delta[0].getFlags(); |
| |
| // become working copy |
| if (flags == IJavaElementDelta.F_PRIMARY_WORKING_COPY) |
| return true; |
| |
| // save |
| if (flags == IJavaElementDelta.F_PRIMARY_RESOURCE && delta[0].getElement().equals(cu)) |
| return true; |
| |
| return canIgnore(cu, delta[0].getAffectedChildren()); |
| } |
| |
| |
| |
| /* |
| * This is a copy of the internal JavaOutlinePage.ElementChangedListener#findElement method. |
| * @see org.eclipse.jdt.internal.ui.javaeditor.JavaOutlinePage.ElementChangedListener#findElement(IJavaElement, IJavaElementDelta) |
| * @since 3.5 |
| */ |
| protected IJavaElementDelta findJavaElementDelta(IJavaElement unit, IJavaElementDelta delta) { |
| |
| if (delta == null || unit == null) |
| return null; |
| |
| IJavaElement element= delta.getElement(); |
| |
| if (canIgnore(unit, delta.getAffectedChildren())) |
| return null; |
| |
| if (unit.equals(element)) { |
| if (isContentChange(delta)) { |
| return delta; |
| } |
| return null; |
| } |
| |
| |
| if (element.getElementType() > IJavaElement.CLASS_FILE) |
| return null; |
| |
| IJavaElementDelta[] children= delta.getAffectedChildren(); |
| if (children == null || children.length == 0) |
| return null; |
| |
| for (int i= 0; i < children.length; i++) { |
| IJavaElementDelta d= findJavaElementDelta(unit, children[i]); |
| if (d != null) |
| return d; |
| } |
| |
| return null; |
| } |
| } |