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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
*
* 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:
* Vincent Lorenzo (CEA LIST) Vincent.Lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.example.uml.comment.editor.newresource.editor;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.SetRequest;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.text.ITextListener;
import org.eclipse.jface.text.TextEvent;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.IVerticalRuler;
import org.eclipse.papyrus.commands.wrappers.GMFtoEMFCommandWrapper;
import org.eclipse.papyrus.example.text.instance.papyrustextinstance.PapyrusTextInstance;
import org.eclipse.papyrus.example.uml.comment.editor.newresource.Activator;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.core.services.ServicesRegistry;
import org.eclipse.papyrus.infra.core.utils.ServiceUtils;
import org.eclipse.papyrus.infra.services.edit.service.ElementEditServiceUtils;
import org.eclipse.papyrus.infra.services.edit.service.IElementEditService;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IPersistableElement;
import org.eclipse.ui.IStorageEditorInput;
import org.eclipse.ui.editors.text.TextEditor;
import org.eclipse.uml2.uml.Comment;
public class PapyrusCommentEditor extends TextEditor {
/** the service registry */
protected final ServicesRegistry registry;
/** the papyrus text instance */
protected final PapyrusTextInstance papyrusTextInstance;
/** the text listener */
protected ITextListener listener;
/** the editing domain */
protected TransactionalEditingDomain domain;
public static final String EDITOR_DEFAULT_NAME = "Comment Editor New Resource";
public static final String EDITOR_TYPE = "CommentEditorNewResource";
/**
*
* Constructor.
*
* @param registry
* @param papyrusTextInstance
*/
public PapyrusCommentEditor(final ServicesRegistry registry, final PapyrusTextInstance papyrusTextInstance) {
super();
this.registry = registry;
this.papyrusTextInstance = papyrusTextInstance;
try {
domain = ServiceUtils.getInstance().getTransactionalEditingDomain(registry);
} catch (ServiceException e) {
Activator.log.error(e);
}
}
/**
*
* @see org.eclipse.ui.texteditor.AbstractDecoratedTextEditor#createSourceViewer(org.eclipse.swt.widgets.Composite,
* org.eclipse.jface.text.source.IVerticalRuler, int)
*
* @param parent
* @param ruler
* @param styles
* @return
*/
@Override
protected ISourceViewer createSourceViewer(Composite parent, IVerticalRuler ruler, int styles) {
ISourceViewer viewer = super.createSourceViewer(parent, ruler, styles);
//we add a listener on the viewer to be notified when the text is edited
//TODO try to improve, because we execute a command for each character
listener = new ITextListener() {
//we edit the uml.Comment
public void textChanged(TextEvent event) {
String currentText = getSourceViewer().getTextWidget().getText();
Comment cmt = (Comment)papyrusTextInstance.getEditedObject();
EStructuralFeature feature = cmt.eClass().getEStructuralFeature("body");
IElementEditService elementEditService = ElementEditServiceUtils.getCommandProvider(cmt);
SetRequest request = new SetRequest(domain, cmt, feature, currentText);
ICommand command = elementEditService.getEditCommand(request);
if(command.canExecute()) {
domain.getCommandStack().execute(new GMFtoEMFCommandWrapper(command));
}
}
};
viewer.addTextListener(listener);
return viewer;
}
/**
* We override this method because setInput can't be overriden for TextEditor.
* We replace the default papyrus input by our input for Comment
*
* @see org.eclipse.ui.editors.text.TextEditor#doSetInput(org.eclipse.ui.IEditorInput)
*
* @param input
* @throws CoreException
*/
@Override
protected void doSetInput(IEditorInput input) throws CoreException {
String string = ((Comment)papyrusTextInstance.getEditedObject()).getBody();
if(string == null) {
string = "";
}
IStorage storage = new TextStorage(string);
super.doSetInput(new TextInput(storage));
}
/**
*
* @see org.eclipse.ui.editors.text.TextEditor#dispose()
*
*/
@Override
public void dispose() {
//we remove the listener
getSourceViewer().removeTextListener(listener);
super.dispose();
}
//for this classes , see : http://wiki.eclipse.org/FAQ_How_do_I_open_an_editor_on_something_that_is_not_a_file%3F
class TextStorage implements IStorage {
private String string;
TextStorage(String input) {
this.string = input;
}
public InputStream getContents() throws CoreException {
return new ByteArrayInputStream(string.getBytes());
}
public IPath getFullPath() {
return null;
}
public Object getAdapter(Class adapter) {
return null;
}
public String getName() {
int len = Math.min(5, string.length());
return string.substring(0, len).concat("..."); //$NON-NLS-1$
}
public boolean isReadOnly() {
return false;
}
}
//for this classes , see : http://wiki.eclipse.org/FAQ_How_do_I_open_an_editor_on_something_that_is_not_a_file%3F
class TextInput implements IStorageEditorInput {
private IStorage storage;
TextInput(IStorage storage) {
this.storage = storage;
}
public boolean exists() {
return true;
}
public ImageDescriptor getImageDescriptor() {
return null;
}
public String getName() {
return storage.getName();
}
public IPersistableElement getPersistable() {
return null;
}
public IStorage getStorage() {
return storage;
}
public String getToolTipText() {
return "String-based file: " + storage.getName();
}
public Object getAdapter(Class adapter) {
return null;
}
}
}
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