diff options
Diffstat (limited to 'jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/dnd/internal/LocalDropEditPolicy.java')
| -rw-r--r-- | jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/dnd/internal/LocalDropEditPolicy.java | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/dnd/internal/LocalDropEditPolicy.java b/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/dnd/internal/LocalDropEditPolicy.java new file mode 100644 index 000000000..f78f8f4e1 --- /dev/null +++ b/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/dnd/internal/LocalDropEditPolicy.java @@ -0,0 +1,235 @@ +/******************************************************************************* + * 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 java.util.HashMap; +import java.util.Map; + +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.dnd.FeedBackInfo; +import org.eclipse.jst.pagedesigner.dnd.ILocalDropHandler; +import org.eclipse.jst.pagedesigner.dnd.LocalDropRequest; +import org.eclipse.jst.pagedesigner.dom.DOMPositionHelper; +import org.eclipse.jst.pagedesigner.dom.IDOMPosition; +import org.eclipse.jst.pagedesigner.editpolicies.LocationHelper; +import org.eclipse.jst.pagedesigner.parts.ElementEditPart; +import org.eclipse.jst.pagedesigner.parts.NodeEditPart; +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; +import org.w3c.dom.Node; + +/** + * This is the editpolicy to handle LocalSelectionDrop + * + * @author mengbo + */ +public class LocalDropEditPolicy extends GraphicalEditPolicy { + private RectangleFigure _feedbackFigure; + + // indicate whether update is checked + private static boolean _checkUpdate = true; + + public boolean checkUpdateWidget(EditPart widgetEditPart, + LocalDropRequest request, Map results) { + if (!(widgetEditPart instanceof ElementEditPart)) { + return false; + } + Node widget = ((ElementEditPart) widgetEditPart).getIDOMNode(); + ILocalDropHandler[] handlers = RegistryReader.getAllHandlers(); + Object localData = request.getLocalObject(); + for (int i = 0; i < handlers.length; i++) { + FeedBackInfo feedback = handlers[i].supportUpdateWidget(localData, + widget); + if (feedback != null) { + results.put(feedback, handlers[i]); + } + } + return !results.isEmpty(); + } + + public boolean checkInsertElement(LocalDropRequest request, + EditPart[] host, Map results, DesignPosition[] dpHolder, + IDOMPosition[] position) { + DesignPosition designPosition = EditPartPositionHelper + .findEditPartPosition(host[0], request.getLocation(), + new DnDPositionValidator(new ActionData( + ActionData.DATABINDING_DND, request))); + dpHolder[0] = designPosition; + if (designPosition == null) { + return false; + } + + host[0] = designPosition.getContainerPart(); + position[0] = DOMPositionHelper.toDOMPosition(designPosition); + ILocalDropHandler[] handlers = RegistryReader.getAllHandlers(); + Object localData = request.getLocalObject(); + for (int i = 0; i < handlers.length; i++) { + FeedBackInfo feedback = handlers[i].supportInsertElements( + localData, position[0]); + if (feedback != null) { + results.put(feedback, handlers[i]); + } + } + return !results.isEmpty(); + } + + /* + * (non-Javadoc) + * + * @see org.eclipse.gef.editpolicies.AbstractEditPolicy#getTargetEditPart(org.eclipse.gef.Request) + */ + public EditPart getTargetEditPart(Request request) { + if (request instanceof LocalDropRequest) { + LocalDropRequest r = (LocalDropRequest) request; + EditPart host = getHost(); + if (_checkUpdate && checkUpdateWidget(host, r, new HashMap())) { + return host; + } + EditPart[] hostHolder = new EditPart[] { host }; + if (checkInsertElement(r, hostHolder, new HashMap(), + new DesignPosition[1], new IDOMPosition[1])) { + return hostHolder[0]; + } + } + return null; + } + + /* + * (non-Javadoc) + * + * @see org.eclipse.gef.editpolicies.AbstractEditPolicy#getCommand(org.eclipse.gef.Request) + */ + public Command getCommand(Request request) { + if (request instanceof LocalDropRequest) { + LocalDropRequest r = (LocalDropRequest) request; + EditPart host = getHost(); + + Map result = new HashMap(); + if (_checkUpdate && checkUpdateWidget(host, r, result)) { + LocalDropCommand command = new LocalDropCommand( + getViewer(host), r.getLocalObject(), result); + command.setWidget(((NodeEditPart) host).getIDOMNode()); + return command; + } + result.clear(); + + EditPart[] hostHolder = new EditPart[] { host }; + IDOMPosition[] positionHolder = new IDOMPosition[1]; + if (checkInsertElement(r, hostHolder, result, + new DesignPosition[1], positionHolder)) { + LocalDropCommand command = new LocalDropCommand( + getViewer(host), r.getLocalObject(), result); + command.setDOMPosition(positionHolder[0]); + return command; + } + } + 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 LocalDropRequest) { + LocalDropRequest r = (LocalDropRequest) request; + EditPart host = getHost(); + if (_checkUpdate && checkUpdateWidget(host, r, new HashMap())) { + Rectangle rect = LocationHelper + .getAbsoluteBounds((GraphicalEditPart) host); + showFeedbackRect(rect); + return; + } + EditPart[] hostHolder = new EditPart[] { host }; + DesignPosition[] holder = new DesignPosition[1]; + if (checkInsertElement(r, hostHolder, new HashMap(), holder, + new IDOMPosition[1])) { + Rectangle rect = EditPartPositionHelper + .convertToAbsoluteCaretRect(holder[0]); + showFeedbackRect(rect); + if (getHost() instanceof GraphicalEditPart) { + ExposeHelper exposeHelper = new ExposeHelper( + getViewer(getHost())); + exposeHelper.adjustVertical(r.getLocation()); + } + return; + } + } + } + + protected RectangleFigure getFeedbackFigure() { + if (_feedbackFigure == null) { + _feedbackFigure = new RectangleFigure(); + _feedbackFigure.setFill(true); + _feedbackFigure.setOutline(true); + _feedbackFigure.setLineWidth(1); + _feedbackFigure.setForegroundColor(ColorConstants.red); + _feedbackFigure.setBounds(new Rectangle(0, 0, 0, 0)); + _feedbackFigure.setXOR(true); + addFeedback(_feedbackFigure); + } + return _feedbackFigure; + } + + protected void showFeedbackRect(Rectangle rect) { + RectangleFigure pf = getFeedbackFigure(); + pf.translateToRelative(rect); + pf.setBounds(rect); + } + + /** + * @return Returns the _forUpdate. + */ + public static boolean isCheckUpdate() { + return _checkUpdate; + } + + /** + * @param update + * The _forUpdate to set. + */ + public static void setCheckUpdate(boolean update) { + _checkUpdate = update; + } +} |