| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.ui; |
| |
| import java.io.BufferedReader; |
| import java.io.CharArrayWriter; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.jface.text.Document; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.team.core.subscribers.ITeamResourceChangeListener; |
| import org.eclipse.team.core.subscribers.TeamDelta; |
| import org.eclipse.team.internal.ccvs.core.CVSException; |
| import org.eclipse.team.internal.ccvs.core.CVSProviderPlugin; |
| import org.eclipse.team.internal.ccvs.core.ICVSFile; |
| import org.eclipse.team.internal.ccvs.core.ICVSRemoteResource; |
| import org.eclipse.team.internal.ccvs.core.resources.CVSWorkspaceRoot; |
| import org.eclipse.ui.IEditorInput; |
| import org.eclipse.ui.IFileEditorInput; |
| import org.eclipse.ui.editors.text.IStorageDocumentProvider; |
| import org.eclipse.ui.texteditor.IDocumentProvider; |
| import org.eclipse.ui.texteditor.IElementStateListener; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.ui.texteditor.quickdiff.IQuickDiffProviderImplementation; |
| |
| /** |
| * The CVS quick diff provider that returns the latest remote revision for a file |
| * that is managed by the CVS provider. |
| * |
| * |
| * |
| * @since 3.0 |
| */ |
| public class RemoteRevisionQuickDiffProvider implements IQuickDiffProviderImplementation { |
| |
| private boolean fDocumentRead = false; |
| private ITextEditor fEditor = null; |
| private IDocument fReference = null; |
| private IDocumentProvider documentProvider = null; |
| private IEditorInput input = null; |
| private String fId; |
| private ICVSFile cvsFile; |
| |
| protected Job updateJob; |
| |
| /** |
| * Updates the document if a sync changes occurs to the associated CVS file. |
| */ |
| private ITeamResourceChangeListener teamChangeListener = new ITeamResourceChangeListener() { |
| public void teamResourceChanged(TeamDelta[] deltas) { |
| if(cvsFile != null) { |
| for (int i = 0; i < deltas.length; i++) { |
| TeamDelta delta = deltas[i]; |
| try { |
| if(delta.getResource().equals(cvsFile.getIResource())) { |
| if(delta.getFlags() == TeamDelta.SYNC_CHANGED) { |
| fetchContentsInJob(); |
| } |
| } |
| } catch (CVSException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| } |
| }; |
| |
| /** |
| * Updates the document if the document is changed (e.g. replace with) |
| */ |
| private IElementStateListener documentListener = new IElementStateListener() { |
| public void elementDirtyStateChanged(Object element, boolean isDirty) { |
| } |
| |
| public void elementContentAboutToBeReplaced(Object element) { |
| } |
| |
| public void elementContentReplaced(Object element) { |
| if(element == input) { |
| fetchContentsInJob(); |
| } |
| } |
| |
| public void elementDeleted(Object element) { |
| } |
| |
| public void elementMoved(Object originalElement, Object movedElement) { |
| } |
| }; |
| |
| /* |
| * @see org.eclipse.test.quickdiff.DocumentLineDiffer.IQuickDiffReferenceProvider#getReference() |
| */ |
| public IDocument getReference(IProgressMonitor monitor) { |
| try { |
| if (!fDocumentRead) |
| readDocument(monitor); |
| if (fDocumentRead) |
| return fReference; |
| else |
| return null; |
| } catch(CoreException e) { |
| CVSUIPlugin.log(e); |
| return null; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.texteditor.quickdiff.IQuickDiffProviderImplementation#setActiveEditor(org.eclipse.ui.texteditor.ITextEditor) |
| */ |
| public void setActiveEditor(ITextEditor targetEditor) { |
| if (targetEditor != fEditor) { |
| dispose(); |
| fEditor= targetEditor; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.texteditor.quickdiff.IQuickDiffProviderImplementation#isEnabled() |
| */ |
| public boolean isEnabled() { |
| if (!initialized()) |
| return false; |
| return getCVSFile() != null; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.source.diff.DocumentLineDiffer.IQuickDiffReferenceProvider#dispose() |
| */ |
| public void dispose() { |
| fReference= null; |
| cvsFile = null; |
| fDocumentRead= false; |
| if(documentProvider != null) { |
| documentProvider.removeElementStateListener(documentListener); |
| } |
| CVSProviderPlugin.getPlugin().getCVSWorkspaceSubscriber().removeListener(teamChangeListener); |
| } |
| |
| /* |
| * @see org.eclipse.quickdiff.QuickDiffTestPlugin.IQuickDiffProviderImplementation#setId(java.lang.String) |
| */ |
| public void setId(String id) { |
| fId= id; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.source.diff.DocumentLineDiffer.IQuickDiffReferenceProvider#getId() |
| */ |
| public String getId() { |
| return fId; |
| } |
| |
| private boolean initialized() { |
| return fEditor != null; |
| } |
| |
| private void readDocument(IProgressMonitor monitor) throws CoreException { |
| if (!initialized()) |
| return; |
| |
| fDocumentRead= false; |
| |
| if (fReference == null) { |
| fReference= new Document(); |
| } |
| |
| cvsFile = getCVSFile(); |
| if(cvsFile != null) { |
| ICVSRemoteResource remote = CVSWorkspaceRoot.getRemoteTree(cvsFile.getIResource(), cvsFile.getSyncInfo().getTag(), monitor); |
| IDocumentProvider docProvider= fEditor.getDocumentProvider(); |
| if (docProvider instanceof IStorageDocumentProvider) { |
| documentProvider = docProvider; |
| IStorageDocumentProvider provider= (IStorageDocumentProvider) documentProvider; |
| String encoding= provider.getEncoding(fEditor.getEditorInput()); |
| if (encoding == null) { |
| encoding= provider.getDefaultEncoding(); |
| } |
| InputStream stream= remote.getContents(monitor); |
| if (stream == null) { |
| return; |
| } |
| setDocumentContent(fReference, stream, encoding); |
| |
| CVSProviderPlugin.getPlugin().getCVSWorkspaceSubscriber().addListener(teamChangeListener); |
| ((IDocumentProvider)provider).addElementStateListener(documentListener); |
| } |
| } |
| fDocumentRead= true; |
| } |
| |
| /** |
| * Intitializes the given document with the given stream using the given encoding. |
| * |
| * @param document the document to be initialized |
| * @param contentStream the stream which delivers the document content |
| * @param encoding the character encoding for reading the given stream |
| * @exception CoreException if the given stream can not be read |
| */ |
| private static void setDocumentContent(IDocument document, InputStream contentStream, String encoding) throws CoreException { |
| Reader in= null; |
| try { |
| final int DEFAULT_FILE_SIZE= 15 * 1024; |
| |
| in= new BufferedReader(new InputStreamReader(contentStream, encoding), DEFAULT_FILE_SIZE); |
| CharArrayWriter caw= new CharArrayWriter(DEFAULT_FILE_SIZE); |
| char[] readBuffer= new char[2048]; |
| int n= in.read(readBuffer); |
| while (n > 0) { |
| caw.write(readBuffer, 0, n); |
| n= in.read(readBuffer); |
| } |
| document.set(caw.toString()); |
| } catch (IOException x) { |
| throw new CVSException(Policy.bind("RemoteRevisionQuickDiffProvider.readingFile"), x); |
| } finally { |
| if (in != null) { |
| try { |
| in.close(); |
| } catch (IOException x) { |
| throw new CVSException(Policy.bind("RemoteRevisionQuickDiffProvider.closingFile"), x); |
| } |
| } |
| } |
| } |
| |
| private ICVSFile getCVSFile() { |
| IEditorInput input= fEditor.getEditorInput(); |
| if (input instanceof IFileEditorInput) { |
| IFile file= ((IFileEditorInput)input).getFile(); |
| try { |
| if(CVSWorkspaceRoot.isSharedWithCVS(file)) { |
| return CVSWorkspaceRoot.getCVSFileFor(file); |
| } |
| } catch (CVSException e) { |
| CVSUIPlugin.log(e); |
| } |
| } |
| return null; |
| } |
| |
| private void fetchContentsInJob() { |
| if(updateJob != null && updateJob.getState() != Job.NONE) { |
| updateJob.cancel(); |
| try { |
| updateJob.join(); |
| } catch (InterruptedException e) { |
| } |
| } |
| Job updateJob = new Job(Policy.bind("RemoteRevisionQuickDiffProvider.fetchingFile")) { |
| protected IStatus run(IProgressMonitor monitor) { |
| try { |
| readDocument(monitor); |
| } catch (CoreException e) { |
| return e.getStatus(); |
| } |
| return Status.OK_STATUS; |
| } |
| }; |
| updateJob.schedule(); |
| } |
| } |