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Diffstat (limited to 'target_explorer/plugins/org.eclipse.tcf.te.filesystem.ui/src/org/eclipse/tcf/te/tcf/filesystem/ui/internal/compare/EditableSharedDocumentAdapter.java')
-rw-r--r--target_explorer/plugins/org.eclipse.tcf.te.filesystem.ui/src/org/eclipse/tcf/te/tcf/filesystem/ui/internal/compare/EditableSharedDocumentAdapter.java256
1 files changed, 256 insertions, 0 deletions
diff --git a/target_explorer/plugins/org.eclipse.tcf.te.filesystem.ui/src/org/eclipse/tcf/te/tcf/filesystem/ui/internal/compare/EditableSharedDocumentAdapter.java b/target_explorer/plugins/org.eclipse.tcf.te.filesystem.ui/src/org/eclipse/tcf/te/tcf/filesystem/ui/internal/compare/EditableSharedDocumentAdapter.java
new file mode 100644
index 000000000..ae087ace0
--- /dev/null
+++ b/target_explorer/plugins/org.eclipse.tcf.te.filesystem.ui/src/org/eclipse/tcf/te/tcf/filesystem/ui/internal/compare/EditableSharedDocumentAdapter.java
@@ -0,0 +1,256 @@
+/*******************************************************************************
+ * Copyright (c) 2005, 2014 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.tcf.te.tcf.filesystem.ui.internal.compare;
+
+import org.eclipse.compare.SharedDocumentAdapter;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.texteditor.IDocumentProvider;
+import org.eclipse.ui.texteditor.IElementStateListener;
+
+/**
+ * A shared document adapter that tracks whether the element is connected to a
+ * shared document and whether the contents have been flushed from a compare
+ * viewer. When contents are flushed, this adapter will connect to the document
+ * provider to ensure that the changes are not lost (see
+ * {@link #hasBufferedContents()}). In order to avoid a leak, the buffer must
+ * either be saved (see
+ * {@link #saveDocument(IEditorInput, boolean, IProgressMonitor)}) or released
+ * (see {@link #releaseBuffer()}).
+ * <p>
+ * This adapter must have a one-to-one correspondence to a typed element.
+ *
+ * @since 3.7 - Copied from
+ * org.eclipse.team.internal.ui.synchronize.EditableSharedDocumentAdapter
+ */
+public class EditableSharedDocumentAdapter extends SharedDocumentAdapter implements IElementStateListener {
+
+ private int connectionCount;
+ private final ISharedDocumentAdapterListener listener;
+ private IEditorInput bufferedKey;
+
+ /**
+ * Interface that provides this adapter with the action of the typed element
+ * and supports call backs to the element when the adapter action changes.
+ */
+ public interface ISharedDocumentAdapterListener {
+
+ /**
+ * Method that is invoked when the adapter connects to the document
+ * provider. This method is only invoked when the adapter first connects
+ * to the document.
+ */
+ void handleDocumentConnected();
+
+ /**
+ * Method that is invoked when the adapter disconnects from the document
+ * provider. This method is only invoked when the adapter no longer has
+ * any connection to the document provider.
+ */
+ void handleDocumentDisconnected();
+
+ /**
+ * Method invoked when changes in the document are flushed to the
+ * adapter.
+ */
+ void handleDocumentFlushed();
+
+ /**
+ * Method invoked when the file behind the shared document is deleted.
+ */
+ void handleDocumentDeleted();
+
+ /**
+ * Method invoked when the document dirty action changes from dirty to
+ * clean.
+ */
+ void handleDocumentSaved();
+ }
+
+ /**
+ * Create the shared document adapter for the given element.
+ *
+ * @param listener
+ * access to element internals
+ */
+ public EditableSharedDocumentAdapter(ISharedDocumentAdapterListener listener) {
+ super();
+ this.listener = listener;
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.compare.SharedDocumentAdapter#connect(org.eclipse.ui.texteditor.IDocumentProvider, org.eclipse.ui.IEditorInput)
+ */
+ @Override
+ public void connect(IDocumentProvider provider, IEditorInput documentKey)
+ throws CoreException {
+ super.connect(provider, documentKey);
+ connectionCount++;
+ if (connectionCount == 1) {
+ provider.addElementStateListener(this);
+ listener.handleDocumentConnected();
+ }
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.compare.SharedDocumentAdapter#disconnect(org.eclipse.ui.texteditor.IDocumentProvider, org.eclipse.ui.IEditorInput)
+ */
+ @Override
+ public void disconnect(IDocumentProvider provider, IEditorInput documentKey) {
+ try {
+ super.disconnect(provider, documentKey);
+ } finally {
+ if (connectionCount > 0)
+ connectionCount--;
+ if (connectionCount == 0) {
+ provider.removeElementStateListener(this);
+ listener.handleDocumentDisconnected();
+ }
+ }
+ }
+
+ /**
+ * Return whether the element is connected to a shared document.
+ *
+ * @return whether the element is connected to a shared document
+ */
+ public boolean isConnected() {
+ return connectionCount > 0;
+ }
+
+ /**
+ * Save the shared document of the element of this adapter.
+ *
+ * @param input
+ * the document key of the element.
+ * @param monitor
+ * a progress monitor
+ * @return whether the save succeeded or not
+ * @throws CoreException
+ */
+ public boolean saveDocument(IEditorInput input, IProgressMonitor monitor)
+ throws CoreException {
+ if (isConnected()) {
+ IDocumentProvider provider = SharedDocumentAdapter
+ .getDocumentProvider(input);
+ try {
+ saveDocument(provider, input, provider.getDocument(input),
+ true, monitor);
+ } finally {
+ // When we write the document, remove out hold on the buffer
+ releaseBuffer();
+ }
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Release the buffer if this adapter has buffered the contents in response
+ * to a
+ * {@link #flushDocument(IDocumentProvider, IEditorInput, IDocument, boolean)}
+ * .
+ */
+ public void releaseBuffer() {
+ if (bufferedKey != null) {
+ IDocumentProvider provider = SharedDocumentAdapter
+ .getDocumentProvider(bufferedKey);
+ provider.disconnect(bufferedKey);
+ bufferedKey = null;
+ }
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.compare.ISharedDocumentAdapter#flushDocument(org.eclipse.ui.texteditor.IDocumentProvider, org.eclipse.ui.IEditorInput, org.eclipse.jface.text.IDocument, boolean)
+ */
+ @Override
+ public void flushDocument(IDocumentProvider provider,
+ IEditorInput documentKey, IDocument document, boolean overwrite)
+ throws CoreException {
+ if (!hasBufferedContents()) {
+ // On a flush, make an extra connection to the shared document so it
+ // will be kept even
+ // if it is no longer being viewed.
+ bufferedKey = documentKey;
+ provider.connect(bufferedKey);
+ }
+ this.listener.handleDocumentFlushed();
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.ui.texteditor.IElementStateListener#elementContentAboutToBeReplaced(java.lang.Object)
+ */
+ @Override
+ public void elementContentAboutToBeReplaced(Object element) {
+ // Nothing to do
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.ui.texteditor.IElementStateListener#elementContentReplaced(java.lang.Object)
+ */
+ @Override
+ public void elementContentReplaced(Object element) {
+ // Nothing to do
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.ui.texteditor.IElementStateListener#elementDeleted(java.lang.Object)
+ */
+ @Override
+ public void elementDeleted(Object element) {
+ listener.handleDocumentDeleted();
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.ui.texteditor.IElementStateListener#elementDirtyStateChanged(java.lang.Object, boolean)
+ */
+ @Override
+ public void elementDirtyStateChanged(Object element, boolean isDirty) {
+ if (!isDirty) {
+ this.listener.handleDocumentSaved();
+ }
+ }
+
+ /* (non-Javadoc)
+ * @see org.eclipse.ui.texteditor.IElementStateListener#elementMoved(java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public void elementMoved(Object originalElement, Object movedElement) {
+ // Nothing to do
+ }
+
+ /**
+ * Return whether the adapter has buffered contents. The adapter buffers
+ * contents by connecting to the document through the document provider.
+ * This means that the adapter must be disconnected either by saving or
+ * discarding the buffer.
+ *
+ * @return whether the adapter has buffered contents
+ */
+ public boolean hasBufferedContents() {
+ return bufferedKey != null;
+ }
+
+ /**
+ * Override getDocumentKey in the super class to provide an editor input
+ * when the element is a <code>LocalTypedElement</code>.
+ */
+ @Override
+ public IEditorInput getDocumentKey(Object element) {
+ if (element instanceof LocalTypedElement) {
+ LocalTypedElement localElement = (LocalTypedElement) element;
+ return localElement.getEditorInput();
+ }
+ return super.getDocumentKey(element);
+ }
+}

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