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/*******************************************************************************
* 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.itemcreation;
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.RectangleFigure;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.GraphicalEditPolicy;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.jst.pagedesigner.commands.CreateItemCommand;
import org.eclipse.jst.pagedesigner.dom.DOMPositionHelper;
import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
import org.eclipse.jst.pagedesigner.tools.ExposeHelper;
import org.eclipse.jst.pagedesigner.validation.caret.ActionData;
import org.eclipse.jst.pagedesigner.validation.caret.DnDPositionValidator;
import org.eclipse.jst.pagedesigner.viewer.DesignPosition;
import org.eclipse.jst.pagedesigner.viewer.EditPartPositionHelper;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
/**
* @author mengbo
*/
public class ItemCreationEditPolicy extends GraphicalEditPolicy {
private RectangleFigure _feedbackFigure;
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.editpolicies.AbstractEditPolicy#getCommand(org.eclipse.gef.Request)
*/
public Command getCommand(Request request) {
if (request instanceof ItemCreationRequest) {
ItemCreationRequest r = (ItemCreationRequest) request;
DesignPosition position = EditPartPositionHelper
.findEditPartPosition(getHost(), r.getLocation(),
new DnDPositionValidator(new ActionData(
ActionData.PALETTE_DND, request)));
IDOMPosition domposition = null;
if (position == null) {
return null;
} else {
domposition = DOMPositionHelper.toDOMPosition(position);
}
if (domposition == null) {
return null;
}
return new CreateItemCommand(
PDPlugin
.getResourceString("ItemCreationEditPolicy.CommandLabel.CreateItem"),//$NON-NLS-1$
getViewer(getHost()), domposition, r.getItemDescriptor());
}
return null;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.editpolicies.AbstractEditPolicy#getTargetEditPart(org.eclipse.gef.Request)
*/
public EditPart getTargetEditPart(Request request) {
if (request instanceof ItemCreationRequest) {
ItemCreationRequest r = (ItemCreationRequest) request;
DesignPosition position = EditPartPositionHelper
.findEditPartPosition(getHost(), r.getLocation(),
new DnDPositionValidator(new ActionData(
ActionData.PALETTE_DND, request)));
if (position == null) {
return null;
}
EditPart container = position.getContainerPart();
return container;
}
return null;
}
/**
* @param host
* @return
*/
private IHTMLGraphicalViewer getViewer(EditPart host) {
return (IHTMLGraphicalViewer) ((GraphicalEditPart) host).getViewer();
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.editpolicies.AbstractEditPolicy#eraseTargetFeedback(org.eclipse.gef.Request)
*/
public void eraseTargetFeedback(Request request) {
if (_feedbackFigure != null) {
removeFeedback(_feedbackFigure);
_feedbackFigure = null;
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.editpolicies.AbstractEditPolicy#showTargetFeedback(org.eclipse.gef.Request)
*/
public void showTargetFeedback(Request request) {
if (request instanceof ItemCreationRequest) {
ItemCreationRequest r = (ItemCreationRequest) request;
DesignPosition position = EditPartPositionHelper
.findEditPartPosition(getHost(), r.getLocation(),
new DnDPositionValidator(new ActionData(
ActionData.PALETTE_DND, request)));
if (position == null) {
return;
}
Rectangle rect = EditPartPositionHelper
.convertToAbsoluteCaretRect(position);
showFeedbackRect(rect);
if (getHost() instanceof GraphicalEditPart) {
ExposeHelper exposeHelper = new ExposeHelper(
getViewer(getHost()));
exposeHelper.adjustVertical(r.getLocation());
}
}
}
protected RectangleFigure getFeedbackFigure() {
if (_feedbackFigure == null) {
_feedbackFigure = new RectangleFigure();
_feedbackFigure.setFill(true);
_feedbackFigure.setXOR(true);
_feedbackFigure.setOutline(true);
_feedbackFigure.setLineWidth(1);
_feedbackFigure.setForegroundColor(ColorConstants.red);
_feedbackFigure.setBounds(new Rectangle(0, 0, 0, 0));
addFeedback(_feedbackFigure);
}
return _feedbackFigure;
}
protected void showFeedbackRect(Rectangle rect) {
RectangleFigure pf = getFeedbackFigure();
pf.translateToRelative(rect);
pf.setBounds(rect);
}
}
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