/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.dnd.internal;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.dnd.TemplateTransfer;
import org.eclipse.jst.pagedesigner.commands.PaletteDropInsertCommand;
import org.eclipse.jst.pagedesigner.editors.pagedesigner.PageDesignerResources;
import org.eclipse.jst.pagedesigner.editors.palette.IDropSourceData;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.graphics.Point;
import org.eclipse.ui.texteditor.ITextEditorDropTargetListener;
import org.eclipse.wst.sse.ui.StructuredTextEditor;
import org.eclipse.wst.sse.ui.internal.ExtendedEditorDropTargetAdapter;
/**
* @author mengbo
*/
public class DesignerSourceDropTargetListener extends
ExtendedEditorDropTargetAdapter implements
ITextEditorDropTargetListener {
private int _location;
private StructuredTextEditor _textEditor;
/**
* @param textEditor
*/
public DesignerSourceDropTargetListener(StructuredTextEditor textEditor) {
super(false);
_textEditor = textEditor;
setTextViewer(_textEditor.getTextViewer());
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ui.texteditor.ITextEditorDropTargetListener#getTransfers()
*/
public Transfer[] getTransfers() {
return new Transfer[] { TemplateTransfer.getInstance(),
TextTransfer.getInstance() };
}
/*
* (non-Javadoc)
*
* @see org.eclipse.swt.dnd.DropTargetListener#dragOperationChanged(org.eclipse.swt.dnd.DropTargetEvent)
*/
public void dragOperationChanged(DropTargetEvent event) {
super.dragOperationChanged(event);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.swt.dnd.DropTargetListener#dragOver(org.eclipse.swt.dnd.DropTargetEvent)
*/
public void dragOver(DropTargetEvent event) {
StyledText text = null;
if (_textEditor.getTextViewer() != null) {
text = _textEditor.getTextViewer().getTextWidget();
if (TemplateTransfer.getInstance().isSupportedType(
event.currentDataType)) {
if (_textEditor.getTextViewer() != null) {
Point p = new Point(event.x, event.y);
SourceViewerDragDropHelper.getInstance().updateCaret(
_textEditor, p);
_location = text.getCaretOffset();
if (TemplateTransfer.getInstance().isSupportedType(
event.currentDataType)) {
_location = SourceViewerDragDropHelper.getInstance()
.getValidLocation(_textEditor, _location);
}
SourceViewerDragDropHelper.getInstance().showCaret(
_textEditor, _location);
}
} else if (TextTransfer.getInstance().isSupportedType(
event.currentDataType)) {
super.dragOver(event);
_location = text.getCaretOffset();
}
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.swt.dnd.DropTargetListener#drop(org.eclipse.swt.dnd.DropTargetEvent)
*/
public void drop(DropTargetEvent event) {
StyledText text = null;
if (_textEditor.getTextViewer() != null) {
text = _textEditor.getTextViewer().getTextWidget();
}
text.setCaretOffset(_location);
Command command = getCommand(event);
if (command == null) {
return;
}
command.execute();
}
private Command getCommand(DropTargetEvent event) {
if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
Object data = event.data;
if (data instanceof String) {
SourceViewLocalDropCommand command = new SourceViewLocalDropCommand(
_textEditor, data, _location);
return command;
}
} else if (TemplateTransfer.getInstance().isSupportedType(
event.currentDataType)) {
Object data = event.data;
PaletteDropInsertCommand command = null;
if (data instanceof IDropSourceData) {
final IDropSourceData dropSourceData = (IDropSourceData) data;
// "Create new item"
command = new PaletteDropInsertCommand(
PageDesignerResources
.getInstance()
.getString(
"DesignerSourceDropTargetListener.InserCommandLabel"), _textEditor, dropSourceData, _location); //$NON-NLS-1$
}
return command;
}
return null;
}
}