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/*******************************************************************************
* Copyright (c) 2006 Ken Gilmer 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: Ken Gilmer - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.example.collab.editor.listeners;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.ecf.core.ContainerFactory;
import org.eclipse.ecf.core.IContainer;
import org.eclipse.ecf.core.identity.ID;
import org.eclipse.ecf.core.identity.IDFactory;
import org.eclipse.ecf.core.util.ECFException;
import org.eclipse.ecf.datashare.IChannel;
import org.eclipse.ecf.datashare.IChannelContainerAdapter;
import org.eclipse.ecf.datashare.IChannelListener;
import org.eclipse.ecf.example.collab.editor.Activator;
import org.eclipse.ecf.example.collab.editor.message.EditorChangeMessage;
import org.eclipse.ecf.example.collab.editor.message.EditorUpdateRequest;
import org.eclipse.ecf.example.collab.editor.preferences.ClientPreferencePage;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentListener;
import org.eclipse.ui.texteditor.AbstractTextEditor;
public class EditorListener implements IDocumentListener {
public static final String SESSION_NAME_DELIMITER = "_";
private IDocument document;
private AbstractTextEditor editor;
private IChannel channel;
private IContainer container = null;
private IChannelListener channelListener;
private String sessionID;
private boolean documentOwner;
public EditorListener(IDocument document, AbstractTextEditor textEditor, boolean owner) {
this.document = document;
this.editor = textEditor;
this.documentOwner = owner;
try {
intializeEditorSession();
if (Activator.getDefault().getPresenceChannelListener() == null) {
Activator.getDefault().intializePresenceSession(new PresenceChannelListener());
}
} catch (ECFException e) {
Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, 0, e.getLocalizedMessage(), e));
} catch (IOException e) {
Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, 0, e.getLocalizedMessage(), e)); }
}
public void documentAboutToBeChanged(DocumentEvent event) {
}
public void documentChanged(DocumentEvent event) {
if (channel == null) {
// Communication error has occured. Stop listening to
// document.
document.removeDocumentListener(this);
return;
}
if (!Activator.getDefault().isListenerActive()) {
//The local editor is being updated by an remote peer, so we do not
//wish to echo this change.
return;
}
sendDocumentUpdateMessage();
}
public void sendDocumentUpdateMessage() {
try {
channel.sendMessage(createMessageFromEvent(document));
} catch (ECFException e) {
Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, 0, e.getLocalizedMessage(), e));
} catch (IOException e) {
Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, 0, e.getLocalizedMessage(), e));
}
}
private byte[] createMessageFromEvent(IDocument document) throws IOException, ECFException {
ByteArrayOutputStream bouts = new ByteArrayOutputStream();
ObjectOutputStream douts = new ObjectOutputStream(bouts);
douts.writeObject(new EditorChangeMessage(document.get()));
return bouts.toByteArray();
}
public void intializeEditorSession() throws ECFException, IOException {
container = ContainerFactory.getDefault().createContainer(
Activator.getDefault().getPreferenceStore().getString(ClientPreferencePage.CONTAINER_TYPE));
IChannelContainerAdapter channelContainer = (IChannelContainerAdapter) container.getAdapter(IChannelContainerAdapter.class);
sessionID = Activator.getDefault().getPreferenceStore().getString(ClientPreferencePage.CHANNEL_ID) + SESSION_NAME_DELIMITER + editor.getTitle();
Activator.getDefault().addSession(sessionID, editor.getTitle());
final ID channelID = IDFactory.getDefault().createID(channelContainer.getChannelNamespace(), sessionID);
channelListener = new EditChannelListener(document, editor, documentOwner, this);
channel = channelContainer.createChannel(channelID, channelListener, new HashMap());
container.connect(IDFactory.getDefault().createID(container.getConnectNamespace(),
Activator.getDefault().getPreferenceStore().getString(ClientPreferencePage.TARGET_SERVER)), null);
//If we don't own the document, request a fresh copy from the owner.
if (!documentOwner) {
sendEditorUpdateRequest();
}
}
private void sendEditorUpdateRequest() throws ECFException, IOException {
if (channel != null) {
channel.sendMessage((new EditorUpdateRequest()).toByteArray());
}
}
public String getSessionID() {
return sessionID;
}
}
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