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/*****************************************************************************
* Copyright (c) 2013 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:
* Camille Letavernier (camille.letavernier@cea.fr) - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.properties.ui.widgets;
import java.util.Iterator;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.emf.utils.TextReferencesHelper;
import org.eclipse.papyrus.infra.widgets.editors.ICommitListener;
import org.eclipse.papyrus.infra.widgets.providers.IStaticContentProvider;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTarget;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.DropTargetListener;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
/**
*
* A StringMultiline property editor with support for TextReferences
*
* @author Camille Letavernier
*
* @see {@link org.eclipse.papyrus.infra.emf.utils.TextReferencesHelper}
*/
public class StringMultilineWithReferences extends AbstractPropertyEditor {
protected TextReferencesHelper textReferencesHelper;
protected StringEditorWithReferences editor;
public void setTextReferencesHelper(TextReferencesHelper helper) {
this.textReferencesHelper = helper;
editor.setTextReferencesHelper(helper);
installDropListener();
}
@Override
protected void doBinding() {
super.doBinding();
IStaticContentProvider provider = input.getContentProvider(propertyPath);
if (provider != null) {
editor.setReferenceBrowserContentProvider(provider);
}
if (getInputObservableValue() instanceof ICommitListener) {
editor.addCommitListener((ICommitListener) getInputObservableValue());
}
}
public StringMultilineWithReferences(Composite parent, int style) {
super();
setEditor(editor = new StringEditorWithReferences(parent, style));
}
protected void installDropListener() {
DropTarget target = new DropTarget(getStringEditor().getText(), DND.DROP_LINK);
LocalSelectionTransfer selectionTransfer = LocalSelectionTransfer.getTransfer();
target.setTransfer(new Transfer[] { selectionTransfer });
target.addDropListener(new DropTargetListener() {
public void dropAccept(DropTargetEvent event) {
}
public void drop(DropTargetEvent event) {
IStructuredSelection dropSelection = getSelection(event);
if (dropSelection == null) {
return;
}
Iterator<?> selectionIterator = dropSelection.iterator();
Text textWidget = getStringEditor().getText();
String textToEdit = textWidget.getText();
int caretPosition = textWidget.getCaretPosition();
while (selectionIterator.hasNext()) {
EObject selectedEObject = EMFHelper.getEObject(selectionIterator.next());
if (selectedEObject == null) {
continue;
}
textToEdit = textReferencesHelper.insertReference(selectedEObject, textToEdit, caretPosition);
}
textWidget.setText(textToEdit);
getStringEditor().setFocus();
}
public void dragOver(DropTargetEvent event) {
verifyDrop(event);
}
public void dragOperationChanged(DropTargetEvent event) {
verifyDrop(event);
}
public void dragLeave(DropTargetEvent event) {
}
public void dragEnter(DropTargetEvent event) {
verifyDrop(event);
}
private void verifyDrop(DropTargetEvent event) {
IStructuredSelection selection = getSelection(event);
if (isValidSelection(selection)) {
event.feedback = DND.FEEDBACK_INSERT_AFTER;
event.detail = DND.DROP_LINK;
} else {
event.detail = DND.DROP_NONE;
}
}
private IStructuredSelection getSelection(DropTargetEvent event) {
if (!(event.getSource() instanceof DropTarget)) {
return null;
}
DropTarget target = (DropTarget) event.getSource();
for (Transfer transfer : target.getTransfer()) {
if (transfer instanceof LocalSelectionTransfer) {
LocalSelectionTransfer selectionTransfer = (LocalSelectionTransfer) transfer;
ISelection selection = selectionTransfer.getSelection();
if (selection instanceof IStructuredSelection) {
return (IStructuredSelection) selection;
}
}
}
return null;
}
private boolean isValidSelection(IStructuredSelection dropSelection) {
if (textReferencesHelper == null) {
return false;
}
if (dropSelection.isEmpty()) {
return false;
}
IStructuredSelection structuredSelection = dropSelection;
Iterator<?> selectionIterator = structuredSelection.iterator();
while (selectionIterator.hasNext()) {
EObject selectedElement = EMFHelper.getEObject(selectionIterator.next());
if (selectedElement == null) {
return false;
}
}
return true;
}
});
}
protected org.eclipse.papyrus.infra.widgets.editors.StringEditor getStringEditor() {
return (org.eclipse.papyrus.infra.widgets.editors.StringEditor) valueEditor;
}
public void setContentProvider(IStaticContentProvider provider) {
editor.setReferenceBrowserContentProvider(provider);
}
public void setLabelProvider(ILabelProvider labelProvider) {
editor.setLabelProvider(labelProvider);
}
}
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