| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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.ui; |
| |
| import org.eclipse.swt.widgets.Control; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.resources.IResourceDelta; |
| |
| import org.eclipse.jface.viewers.IBasicPropertyConstants; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| |
| import org.eclipse.jdt.core.ElementChangedEvent; |
| import org.eclipse.jdt.core.IClassFile; |
| 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.IPackageFragment; |
| import org.eclipse.jdt.core.IPackageFragmentRoot; |
| import org.eclipse.jdt.core.JavaCore; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| import org.eclipse.jdt.internal.corext.util.JavaModelUtil; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| |
| /** |
| * A tree content provider for Java elements. It extends the |
| * StandardJavaElementContentProvider with support for listening to changes. |
| * <p> |
| * This class may be instantiated; it is not intended to be subclassed. |
| * </p> |
| * @deprecated use the StandardJavaElementContentProvider instead |
| * @see StandardJavaElementContentProvider |
| * |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| @Deprecated |
| public class JavaElementContentProvider extends StandardJavaElementContentProvider implements IElementChangedListener { |
| |
| /** The tree viewer */ |
| protected TreeViewer fViewer; |
| /** The input object */ |
| protected Object fInput; |
| |
| @Override |
| public void dispose() { |
| super.dispose(); |
| JavaCore.removeElementChangedListener(this); |
| } |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| super.inputChanged(viewer, oldInput, newInput); |
| fViewer= (TreeViewer)viewer; |
| if (oldInput == null && newInput != null) { |
| JavaCore.addElementChangedListener(this); |
| } else if (oldInput != null && newInput == null) { |
| JavaCore.removeElementChangedListener(this); |
| } |
| fInput= newInput; |
| } |
| /** |
| * Creates a new content provider for Java elements. |
| */ |
| public JavaElementContentProvider() { |
| } |
| |
| /** |
| * Creates a new content provider for Java elements. |
| * |
| * @param provideMembers if <code>true</code> members below compilation units |
| * and class files are provided. |
| * @param provideWorkingCopy if <code>true</code> the element provider provides |
| * working copies for members of compilation units which have an associated working |
| * copy. Otherwise only original elements are provided. |
| * |
| * @since 2.0 |
| */ |
| public JavaElementContentProvider(boolean provideMembers, boolean provideWorkingCopy) { |
| super(provideMembers, provideWorkingCopy); |
| } |
| |
| @Override |
| public void elementChanged(final ElementChangedEvent event) { |
| try { |
| processDelta(event.getDelta()); |
| } catch(JavaModelException e) { |
| JavaPlugin.log(e); |
| } |
| } |
| |
| /** |
| * Processes a delta recursively. When more than two children are affected the |
| * tree is fully refreshed starting at this node. The delta is processed in the |
| * current thread but the viewer updates are posted to the UI thread. |
| * |
| * @param delta the delta to be processed |
| * |
| * @throws JavaModelException if an error occurs while processing the delta |
| */ |
| protected void processDelta(IJavaElementDelta delta) throws JavaModelException { |
| int kind= delta.getKind(); |
| int flags= delta.getFlags(); |
| IJavaElement element= delta.getElement(); |
| |
| if (element instanceof ICompilationUnit) { |
| if (!getProvideWorkingCopy()) |
| return; |
| |
| ICompilationUnit cu= (ICompilationUnit) element; |
| if (!JavaModelUtil.isPrimary(cu) || !isOnClassPath((ICompilationUnit)element)) { |
| return; |
| } |
| } |
| |
| // handle open and closing of a solution or project |
| if (((flags & IJavaElementDelta.F_CLOSED) != 0) || ((flags & IJavaElementDelta.F_OPENED) != 0)) { |
| postRefresh(element); |
| return; |
| } |
| |
| if (kind == IJavaElementDelta.REMOVED) { |
| Object parent= internalGetParent(element); |
| postRemove(element); |
| if (parent instanceof IPackageFragment) |
| updatePackageIcon((IPackageFragment)parent); |
| // we are filtering out empty subpackages, so we |
| // a package becomes empty we remove it from the viewer. |
| if (isPackageFragmentEmpty(element.getParent())) { |
| if (fViewer.testFindItem(parent) != null) |
| postRefresh(internalGetParent(parent)); |
| } |
| return; |
| } |
| |
| if (kind == IJavaElementDelta.ADDED) { |
| Object parent= internalGetParent(element); |
| // we are filtering out empty subpackages, so we |
| // have to handle additions to them specially. |
| if (parent instanceof IPackageFragment) { |
| Object grandparent= internalGetParent(parent); |
| // 1GE8SI6: ITPJUI:WIN98 - Rename is not shown in Packages View |
| // avoid posting a refresh to an invisible parent |
| if (parent.equals(fInput)) { |
| postRefresh(parent); |
| } else { |
| // refresh from grandparent if parent isn't visible yet |
| if (fViewer.testFindItem(parent) == null) |
| postRefresh(grandparent); |
| else { |
| postRefresh(parent); |
| } |
| } |
| } else { |
| postAdd(parent, element); |
| } |
| } |
| |
| if (element instanceof ICompilationUnit) { |
| if (kind == IJavaElementDelta.CHANGED) { |
| postRefresh(element); |
| return; |
| } |
| } |
| // we don't show the contents of a compilation or IClassFile, so don't go any deeper |
| if ((element instanceof ICompilationUnit) || (element instanceof IClassFile)) |
| return; |
| |
| // the contents of an external JAR has changed |
| if (element instanceof IPackageFragmentRoot && ((flags & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0)) |
| postRefresh(element); |
| |
| if (isClassPathChange(delta)) { |
| // throw the towel and do a full refresh of the affected java project. |
| postRefresh(element.getJavaProject()); |
| } |
| |
| if (delta.getResourceDeltas() != null) { |
| IResourceDelta[] rd= delta.getResourceDeltas(); |
| for (int i= 0; i < rd.length; i++) { |
| processResourceDelta(rd[i], element); |
| } |
| } |
| |
| IJavaElementDelta[] affectedChildren= delta.getAffectedChildren(); |
| if (affectedChildren.length > 1) { |
| // a package fragment might become non empty refresh from the parent |
| if (element instanceof IPackageFragment) { |
| IJavaElement parent= (IJavaElement)internalGetParent(element); |
| // 1GE8SI6: ITPJUI:WIN98 - Rename is not shown in Packages View |
| // avoid posting a refresh to an invisible parent |
| if (element.equals(fInput)) { |
| postRefresh(element); |
| } else { |
| postRefresh(parent); |
| } |
| return; |
| } |
| // more than one child changed, refresh from here downwards |
| if (element instanceof IPackageFragmentRoot) |
| postRefresh(skipProjectPackageFragmentRoot((IPackageFragmentRoot)element)); |
| else |
| postRefresh(element); |
| return; |
| } |
| for (int i= 0; i < affectedChildren.length; i++) { |
| processDelta(affectedChildren[i]); |
| } |
| } |
| |
| private boolean isOnClassPath(ICompilationUnit element) { |
| IJavaProject project= element.getJavaProject(); |
| if (project == null || !project.exists()) |
| return false; |
| return project.isOnClasspath(element); |
| } |
| |
| |
| /* |
| * Updates the package icon |
| */ |
| private void updatePackageIcon(final IJavaElement element) { |
| postRunnable(new Runnable() { |
| @Override |
| public void run() { |
| // 1GF87WR: ITPUI:ALL - SWTEx + NPE closing a workbench window. |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) |
| fViewer.update(element, new String[]{IBasicPropertyConstants.P_IMAGE}); |
| } |
| }); |
| } |
| |
| /* |
| * Process resource deltas |
| */ |
| private void processResourceDelta(IResourceDelta delta, Object parent) { |
| int status= delta.getKind(); |
| IResource resource= delta.getResource(); |
| // filter out changes affecting the output folder |
| if (resource == null) |
| return; |
| |
| // this could be optimized by handling all the added children in the parent |
| if ((status & IResourceDelta.REMOVED) != 0) { |
| if (parent instanceof IPackageFragment) |
| // refresh one level above to deal with empty package filtering properly |
| postRefresh(internalGetParent(parent)); |
| else |
| postRemove(resource); |
| } |
| if ((status & IResourceDelta.ADDED) != 0) { |
| if (parent instanceof IPackageFragment) |
| // refresh one level above to deal with empty package filtering properly |
| postRefresh(internalGetParent(parent)); |
| else |
| postAdd(parent, resource); |
| } |
| IResourceDelta[] affectedChildren= delta.getAffectedChildren(); |
| |
| if (affectedChildren.length > 1) { |
| // more than one child changed, refresh from here downwards |
| postRefresh(resource); |
| return; |
| } |
| |
| for (int i= 0; i < affectedChildren.length; i++) |
| processResourceDelta(affectedChildren[i], resource); |
| } |
| |
| private void postRefresh(final Object root) { |
| postRunnable(new Runnable() { |
| @Override |
| public void run() { |
| // 1GF87WR: ITPUI:ALL - SWTEx + NPE closing a workbench window. |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) |
| fViewer.refresh(root); |
| } |
| }); |
| } |
| |
| private void postAdd(final Object parent, final Object element) { |
| postRunnable(new Runnable() { |
| @Override |
| public void run() { |
| // 1GF87WR: ITPUI:ALL - SWTEx + NPE closing a workbench window. |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) |
| fViewer.add(parent, element); |
| } |
| }); |
| } |
| |
| private void postRemove(final Object element) { |
| postRunnable(new Runnable() { |
| @Override |
| public void run() { |
| // 1GF87WR: ITPUI:ALL - SWTEx + NPE closing a workbench window. |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) |
| fViewer.remove(element); |
| } |
| }); |
| } |
| |
| private void postRunnable(final Runnable r) { |
| Control ctrl= fViewer.getControl(); |
| if (ctrl != null && !ctrl.isDisposed()) { |
| ctrl.getDisplay().asyncExec(r); |
| } |
| } |
| } |