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/*******************************************************************************
* Copyright (c) 2006, 2007 Oracle. 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: Oracle. - initial API and implementation
*******************************************************************************/
package org.eclipse.jpt.ui.internal.views;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ITreeSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jpt.core.internal.IJpaContentNode;
import org.eclipse.jpt.core.internal.IJpaFile;
import org.eclipse.jpt.ui.internal.IJpaPlatformUi;
import org.eclipse.jpt.ui.internal.JptUiMessages;
import org.eclipse.jpt.ui.internal.PlatformRegistry;
import org.eclipse.jpt.ui.internal.jface.NullLabelProvider;
import org.eclipse.jpt.ui.internal.jface.NullTreeContentProvider;
import org.eclipse.jpt.ui.internal.selection.Selection;
import org.eclipse.jpt.ui.internal.structure.IJpaStructureProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.IWorkbenchActionConstants;
public class JpaStructureView extends AbstractJpaView
{
private StructureComposite structureComposite;
public JpaStructureView() {
super(JptUiMessages.JpaStructureView_viewNotAvailable);
}
@Override
public void subcreatePartControl(Composite parent) {
structureComposite =
new StructureComposite(pageBook, SWT.NULL);
}
public Selection getSelection() {
if (structureComposite.isVisible()) {
return structureComposite.getSelection();
}
else {
return Selection.NULL_SELECTION;
}
}
@Override
public void select(Selection newSelection) {
Selection currentSelection = getSelection();
if (newSelection.equals(currentSelection)) {
return;
}
if (newSelection == Selection.NULL_SELECTION) {
showDefaultPage();
}
else {
pageBook.showPage(structureComposite);
}
structureComposite.select(newSelection);
}
public void addSelectionChangedListener(ISelectionChangedListener listener) {
structureComposite.viewer.addSelectionChangedListener(listener);
}
public void removeSelectionChangedListener(ISelectionChangedListener listener) {
structureComposite.viewer.removeSelectionChangedListener(listener);
}
private class StructureComposite extends Composite
{
/* key: String file content id, value: IJpaStructureProvider */
private Map structureProviders;
private TreeViewer viewer;
private StructureComposite(Composite parent, int style) {
super(parent, style);
structureProviders = new HashMap();
this.setLayout(new FillLayout());
viewer = new TreeViewer(this, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
viewer.setAutoExpandLevel(2);
initContextMenu();
}
protected void initContextMenu() {
// Create dynamic menu mgr. Dynamic is currently required to
// support action contributions.
MenuManager mgr = new MenuManager();
mgr.setRemoveAllWhenShown(true);
mgr.addMenuListener(new IMenuListener() {
public void menuAboutToShow(IMenuManager mgr) {
fillContextMenu(mgr);
}
});
Menu menu = mgr.createContextMenu(viewer.getControl());
viewer.getControl().setMenu(menu);
getSite().registerContextMenu(mgr, viewer);
}
/**
* Called when the context menu is about to open.
* Delegates to the action group using the viewer's selection as the action context.
* @since 2.0
*/
protected void fillContextMenu(IMenuManager manager) {
manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
}
private Selection getSelection() {
ITreeSelection viewerSelection = (ITreeSelection) viewer.getSelection();
if (viewerSelection.isEmpty() || viewerSelection.size() > 1) {
if (viewer.getInput() == null) {
return Selection.NULL_SELECTION;
}
else {
return new Selection((IJpaContentNode) viewer.getInput());
}
}
else {
return new Selection((IJpaContentNode) viewerSelection.getFirstElement());
}
}
private void select(Selection selection) {
// note: checks for null and equals() selection have already been performed
if (selection.equals(Selection.NULL_SELECTION)) {
clearViewer();
return;
}
Selection currentSelection = getSelection();
IJpaContentNode newNode = selection.getSelectedNode();
IJpaFile newFile = newNode.getJpaFile();
IJpaContentNode currentNode =
(currentSelection == Selection.NULL_SELECTION) ?
null : getSelection().getSelectedNode();
IJpaFile currentFile =
(currentNode == null) ?
null : currentNode.getJpaFile();
if (newFile.equals(currentFile)) {
viewer.setSelection(new StructuredSelection(newNode), true);
}
else if (currentFile != null && newFile.getContentId().equals(currentFile.getContentId())) {
viewer.setInput(newFile.getContent());
viewer.setSelection(new StructuredSelection(newNode), true);
}
else {
// new content type
// replace composite and set selection of tree
IJpaStructureProvider provider = getStructureProvider(newNode);
if (provider == null) {
clearViewer();
}
else {
viewer.setContentProvider(provider.buildContentProvider());
viewer.setLabelProvider(provider.buildLabelProvider());
viewer.setInput(newFile.getContent());
}
}
}
private void clearViewer() {
viewer.setContentProvider(NullTreeContentProvider.INSTANCE);
viewer.setLabelProvider(NullLabelProvider.INSTANCE);
viewer.setInput(null);
}
private IJpaStructureProvider getStructureProvider(IJpaContentNode contentNode) {
String contentId = contentNode.getJpaFile().getContentId();
IJpaStructureProvider provider =
(IJpaStructureProvider) structureProviders.get(contentId);
if (provider == null) {
String vendorId = contentNode.getJpaProject().getPlatform().getId();
IJpaPlatformUi jpaPlatformUI = PlatformRegistry.INSTANCE.getJpaPlatform(vendorId);
for (IJpaStructureProvider p : jpaPlatformUI.structureProviders()) {
if (p.fileContentType().equals(contentId)) {
provider = p;
break;
}
}
//TODO this view and the detailsProviders Map is not created on a per project basis.
//the detailsProviders and their fileContentTypes could overlap across project, this would cause problems with storing this map.
if (provider != null) {
structureProviders.put(contentId, provider);
}
}
return provider;
}
}
}
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