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/*******************************************************************************
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* Copyright (c) 2003, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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* Oakland Software (Francis Upton - francisu@ieee.org)
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* bug 197113 Project Explorer drag and drop selection not working properly
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*******************************************************************************/
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package org.eclipse.ui.navigator;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import org.eclipse.jface.viewers.IBaseLabelProvider;
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import org.eclipse.jface.viewers.ISelection;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.LabelProviderChangedEvent;
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import org.eclipse.jface.viewers.StructuredSelection;
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import org.eclipse.jface.viewers.TreeViewer;
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import org.eclipse.jface.viewers.ViewerSorter;
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import org.eclipse.swt.dnd.DND;
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import org.eclipse.swt.events.DisposeEvent;
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import org.eclipse.swt.events.MouseAdapter;
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import org.eclipse.swt.events.MouseEvent;
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import org.eclipse.swt.events.SelectionEvent;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Control;
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import org.eclipse.swt.widgets.Item;
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import org.eclipse.swt.widgets.Widget;
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import org.eclipse.ui.internal.navigator.CommonNavigatorFrameSource;
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import org.eclipse.ui.internal.navigator.ContributorTrackingSet;
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import org.eclipse.ui.internal.navigator.NavigatorContentService;
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//import org.eclipse.ui.internal.navigator.NavigatorDecoratingLabelProvider;
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import org.eclipse.ui.internal.navigator.NavigatorPipelineService;
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import org.eclipse.ui.internal.navigator.dnd.NavigatorDnDService;
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import org.eclipse.ui.internal.navigator.framelist.FrameList;
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/**
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*
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* Provides the Tree Viewer for the Common Navigator. Content and labels are
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* provided by an instance of {@link INavigatorContentService} which uses
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* the ID supplied in the constructor
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* {@link CommonViewer#CommonViewer(String, Composite, int)} or through
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* {@link NavigatorContentServiceFactory#createContentService(String, org.eclipse.jface.viewers.StructuredViewer)}.
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*
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* <p>
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* Clients may extend this class.
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* </p>
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*
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* <p>
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* Note that as of 3.2.1 and 3.3, the common viewer caches its selection.
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* Clients must not set the selection of the viewer's tree control directly.
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* </p>
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*
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* @since 3.2
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*/
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public class CommonViewer extends TreeViewer {
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private final NavigatorContentService contentService;
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private ISelection cachedSelection;
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private FrameList frameList;
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private CommonNavigator commonNavigator;
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private ICommonViewerMapper _mapper;
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/**
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* <p>
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* Constructs the Tree Viewer for the Common Navigator and the corresponding
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* NavigatorContentService. The NavigatorContentService will provide the
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* Content Provider and Label Provider -- these need not be supplied by
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* clients.
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* <p>
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* For the valid bits to supply in the style mask (aStyle), see
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* documentation provided by {@link TreeViewer}.
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* </p>
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*
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* @param aViewerId
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* An id tied to the extensions that is used to focus specific
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* content to a particular instance of the Common Navigator
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* @param aParent
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* A Composite parent to contain the actual SWT widget
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* @param aStyle
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* A style mask that will be used to create the TreeViewer
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* Composite.
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*/
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public CommonViewer(String aViewerId, Composite aParent, int aStyle) {
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super(aParent, aStyle);
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contentService = new NavigatorContentService(aViewerId, this);
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init();
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}
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/**
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* <p>
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* Initializes the content provider, label provider, and drag and drop
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* support. Should not be called by clients -- this method is invoked when
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* the constructor is invoked.
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* </p>
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*/
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protected void init() {
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setUseHashlookup(true);
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setContentProvider(contentService.createCommonContentProvider());
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// RAP [bmichalik]: label provider
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setLabelProvider(contentService.createCommonLabelProvider());
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// setLabelProvider(new NavigatorDecoratingLabelProvider(contentService.createCommonLabelProvider()));
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// RAPEND
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initDragAndDrop();
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}
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void setCommonNavigator(CommonNavigator navigator) {
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commonNavigator = navigator;
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}
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/**
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* Sets the {@link ICommonViewerMapper} to work with this viewer.
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*
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* @param mapper
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* @since 3.4
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*/
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public void setMapper(ICommonViewerMapper mapper) {
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_mapper = mapper;
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}
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/**
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* Gets the {@link ICommonViewerMapper} assigned to this viewer.
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*
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* @return the mapper
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* @since 3.4
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*/
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public ICommonViewerMapper getMapper() {
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return _mapper;
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}
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/**
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* @return the CommonNavigator
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* @since 3.4
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*/
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public CommonNavigator getCommonNavigator() {
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return commonNavigator;
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}
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protected void removeWithoutRefresh(Object[] elements) {
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super.remove(elements);
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}
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/**
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* <p>
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* Adds DND support to the Navigator. Uses hooks into the extensible
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* framework for DND.
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* </p>
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* <p>
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* By default, the following Transfer types are supported:
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* <ul>
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* <li>LocalSelectionTransfer.getInstance(),
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* <li>PluginTransfer.getInstance()
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* </ul>
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* </p>
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*
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* @see CommonDragAdapter
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* @see CommonDropAdapter
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*/
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protected void initDragAndDrop() {
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int operations = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK;
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CommonDragAdapter dragAdapter = createDragAdapter();
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addDragSupport(operations, dragAdapter.getSupportedDragTransfers(),
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dragAdapter);
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CommonDropAdapter dropAdapter = createDropAdapter();
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addDropSupport(operations, dropAdapter.getSupportedDropTransfers(),
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dropAdapter);
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NavigatorDnDService dnd = (NavigatorDnDService)contentService.getDnDService();
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dnd.setDropAdaptor(dropAdapter);
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}
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/**
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* Creates the {@link CommonDragAdapter}, this is used to provide a subclass
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* if desired.
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*
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* @return the CommonDragAdapter
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*
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* @since 3.4
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*/
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protected CommonDragAdapter createDragAdapter() {
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return new CommonDragAdapter(contentService, this);
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}
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/**
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* Creates the {@link CommonDropAdapter}, this is used to provide a subclass
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* if desired.
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*
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* @return the CommonDropAdapter
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*
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* @since 3.4
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*/
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protected CommonDropAdapter createDropAdapter() {
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return new CommonDropAdapter(contentService, this);
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}
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/*
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* @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent)
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*/
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protected void handleLabelProviderChanged(LabelProviderChangedEvent event) {
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Object[] changed = event.getElements();
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if (changed != null) {
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List others = new ArrayList();
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for (int i = 0; i < changed.length; i++) {
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if (changed[i] == null)
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continue;
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if (_mapper != null) {
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if (_mapper.handlesObject(changed[i])) {
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_mapper.objectChanged(changed[i]);
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continue;
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}
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}
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others.add(changed[i]);
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}
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if (others.isEmpty()) {
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return;
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}
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event = new LabelProviderChangedEvent((IBaseLabelProvider) event
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.getSource(), others.toArray());
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}
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super.handleLabelProviderChanged(event);
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}
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protected void handleDispose(DisposeEvent event) {
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dispose();
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super.handleDispose(event);
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}
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/**
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* <p>
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* Disposes of the NavigatorContentService, which will dispose the Content
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* and Label providers.
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* </p>
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*/
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public void dispose() {
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if (contentService != null) {
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contentService.dispose();
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}
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clearSelectionCache();
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}
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/**
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* Sets this viewer's sorter and triggers refiltering and resorting of this
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* viewer's element. Passing <code>null</code> turns sorting off.
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*
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* @param sorter
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* a viewer sorter, or <code>null</code> if none
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*/
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public void setSorter(ViewerSorter sorter) {
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if (sorter != null && sorter instanceof CommonViewerSorter) {
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((CommonViewerSorter) sorter).setContentService(contentService);
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}
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super.setSorter(sorter);
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}
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/**
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* <p>
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* The {@link INavigatorContentService}provides the hook into the framework
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* to provide content from the various extensions.
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* </p>
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*
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* @return The {@link INavigatorContentService}that was created when the
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* viewer was created.
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*/
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public INavigatorContentService getNavigatorContentService() {
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return contentService;
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}
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/*
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* (non-Javadoc)
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*
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* @see org.eclipse.jface.viewers.AbstractTreeViewer#add(java.lang.Object,
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* java.lang.Object[])
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*/
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public void add(Object parentElement, Object[] childElements) {
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NavigatorPipelineService pipeDream = (NavigatorPipelineService) contentService
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.getPipelineService();
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PipelinedShapeModification modification = new PipelinedShapeModification(
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parentElement, new ContributorTrackingSet(contentService,
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childElements));
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pipeDream.interceptAdd(modification);
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Object parent = (parentElement == getInput()) ? getInput()
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: modification.getParent();
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super.add(parent, modification.getChildren().toArray());
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}
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/**
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* <p>
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* Removals are handled by refreshing the parents of each of the given
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* elements. The parents are determined via calls ot the contentProvider.
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* </p>
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*
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* @see org.eclipse.jface.viewers.AbstractTreeViewer#remove(java.lang.Object[])
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*/
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public void remove(Object[] elements) {
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NavigatorPipelineService pipeDream = (NavigatorPipelineService) contentService
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.getPipelineService();
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PipelinedShapeModification modification = new PipelinedShapeModification(
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null, new ContributorTrackingSet(contentService, elements));
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pipeDream.interceptRemove(modification);
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super.remove(modification.getChildren().toArray());
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}
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/*
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* (non-Javadoc)
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*
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* @see org.eclipse.jface.viewers.StructuredViewer#refresh(java.lang.Object,
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* boolean)
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*/
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public void refresh(Object element, boolean updateLabels) {
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if(element != getInput()) {
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INavigatorPipelineService pipeDream = contentService
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.getPipelineService();
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PipelinedViewerUpdate update = new PipelinedViewerUpdate();
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update.getRefreshTargets().add(element);
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update.setUpdateLabels(updateLabels);
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/* if the update is modified */
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if (pipeDream.interceptRefresh(update)) {
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/* intercept and apply the update */
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boolean toUpdateLabels = update.isUpdateLabels();
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for (Iterator iter = update.getRefreshTargets().iterator(); iter
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.hasNext();) {
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super.refresh(iter.next(), toUpdateLabels);
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}
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} else {
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super.refresh(element, updateLabels);
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}
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} else {
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super.refresh(element, updateLabels);
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}
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}
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/*
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* (non-Javadoc)
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* @see org.eclipse.jface.viewers.Viewer#setSelection(org.eclipse.jface.viewers.ISelection, boolean)
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*/
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public void setSelection(ISelection selection, boolean reveal) {
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if(selection instanceof IStructuredSelection) {
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IStructuredSelection sSelection = (IStructuredSelection) selection;
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INavigatorPipelineService pipeDream = contentService
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.getPipelineService();
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PipelinedViewerUpdate update = new PipelinedViewerUpdate();
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update.getRefreshTargets().addAll(sSelection.toList());
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update.setUpdateLabels(false);
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/* if the update is modified */
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if (pipeDream.interceptRefresh(update)) {
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/* intercept and apply the update */
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super.setSelection(new StructuredSelection(update.getRefreshTargets().toArray()) , reveal);
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} else {
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super.setSelection(selection, reveal);
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}
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}
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.ContentViewer#hookControl(Control)
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*/
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protected void hookControl(Control control) {
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super.hookControl(control);
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// FIXME - This caching thing should not be here; it's brittle.
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394
|
// The underlying problem of over-calling of getSelection() should
|
|
395
|
// be addressed instead (see bugs 144294 and 140032)
|
|
396
|
// The DragStart event will come before the SelectionEvent on
|
|
397
|
// some platforms (GTK). Since DragStart can turn around and
|
|
398
|
// call getSelection(), we need to clear the cache.
|
|
399
|
control.addMouseListener(new MouseAdapter() {
|
|
400
|
public void mouseDown(MouseEvent e) {
|
|
401
|
clearSelectionCache();
|
|
402
|
}
|
|
403
|
});
|
|
404
|
}
|
|
405
|
|
|
406
|
|
|
407
|
/**
|
|
408
|
* Update an item in the tree.
|
|
409
|
*
|
|
410
|
* @param item the item in the tree to update
|
|
411
|
* @since 3.4
|
|
412
|
*
|
|
413
|
*/
|
|
414
|
public void doUpdateItem(Widget item) {
|
|
415
|
doUpdateItem(item, item.getData(), true);
|
|
416
|
}
|
|
417
|
|
|
418
|
/*
|
|
419
|
* @see StructuredViewer#mapElement(Object, Widget)
|
|
420
|
*/
|
|
421
|
protected void mapElement(Object element, Widget item) {
|
|
422
|
super.mapElement(element, item);
|
|
423
|
if (_mapper != null && item instanceof Item) {
|
|
424
|
_mapper.addToMap(element, (Item) item);
|
|
425
|
}
|
|
426
|
}
|
|
427
|
|
|
428
|
/*
|
|
429
|
* @see StructuredViewer#unmapElement(Object, Widget)
|
|
430
|
*/
|
|
431
|
protected void unmapElement(Object element, Widget item) {
|
|
432
|
if (_mapper != null && item instanceof Item) {
|
|
433
|
_mapper.removeFromMap(element, (Item) item);
|
|
434
|
}
|
|
435
|
super.unmapElement(element, item);
|
|
436
|
}
|
|
437
|
|
|
438
|
/*
|
|
439
|
* @see StructuredViewer#unmapAllElements()
|
|
440
|
*/
|
|
441
|
protected void unmapAllElements() {
|
|
442
|
if (_mapper != null)
|
|
443
|
_mapper.clearMap();
|
|
444
|
super.unmapAllElements();
|
|
445
|
}
|
|
446
|
|
|
447
|
/* (non-Javadoc)
|
|
448
|
* @see org.eclipse.jface.viewers.AbstractTreeViewer#setSelectionToWidget(java.util.List, boolean)
|
|
449
|
*/
|
|
450
|
protected void setSelectionToWidget(List v, boolean reveal) {
|
|
451
|
clearSelectionCache();
|
|
452
|
super.setSelectionToWidget(v, reveal);
|
|
453
|
}
|
|
454
|
|
|
455
|
/* (non-Javadoc)
|
|
456
|
* @see org.eclipse.jface.viewers.AbstractTreeViewer#handleDoubleSelect(org.eclipse.swt.events.SelectionEvent)
|
|
457
|
*/
|
|
458
|
protected void handleDoubleSelect(SelectionEvent event) {
|
|
459
|
clearSelectionCache();
|
|
460
|
super.handleDoubleSelect(event);
|
|
461
|
}
|
|
462
|
|
|
463
|
/* (non-Javadoc)
|
|
464
|
* @see org.eclipse.jface.viewers.StructuredViewer#handleOpen(org.eclipse.swt.events.SelectionEvent)
|
|
465
|
*/
|
|
466
|
protected void handleOpen(SelectionEvent event) {
|
|
467
|
clearSelectionCache();
|
|
468
|
super.handleOpen(event);
|
|
469
|
}
|
|
470
|
|
|
471
|
/* (non-Javadoc)
|
|
472
|
* @see org.eclipse.jface.viewers.StructuredViewer#handlePostSelect(org.eclipse.swt.events.SelectionEvent)
|
|
473
|
*/
|
|
474
|
protected void handlePostSelect(SelectionEvent e) {
|
|
475
|
clearSelectionCache();
|
|
476
|
super.handlePostSelect(e);
|
|
477
|
}
|
|
478
|
|
|
479
|
/* (non-Javadoc)
|
|
480
|
* @see org.eclipse.jface.viewers.StructuredViewer#handleSelect(org.eclipse.swt.events.SelectionEvent)
|
|
481
|
*/
|
|
482
|
protected void handleSelect(SelectionEvent event) {
|
|
483
|
clearSelectionCache();
|
|
484
|
super.handleSelect(event);
|
|
485
|
}
|
|
486
|
|
|
487
|
/**
|
|
488
|
* Clears the selection cache.
|
|
489
|
*/
|
|
490
|
private void clearSelectionCache() {
|
|
491
|
cachedSelection = null;
|
|
492
|
}
|
|
493
|
|
|
494
|
/**
|
|
495
|
* Returns the current selection.
|
|
496
|
* <p>
|
|
497
|
* Note that as of 3.2.1 and 3.3, the common viewer caches its selection.
|
|
498
|
* Clients must not set the selection of the viewer's tree control directly.
|
|
499
|
* </p>
|
|
500
|
*
|
|
501
|
* @see org.eclipse.jface.viewers.AbstractTreeViewer#getSelection()
|
|
502
|
*/
|
|
503
|
public ISelection getSelection() {
|
|
504
|
if (cachedSelection == null) {
|
|
505
|
cachedSelection = super.getSelection();
|
|
506
|
}
|
|
507
|
return cachedSelection;
|
|
508
|
}
|
|
509
|
|
|
510
|
/*
|
|
511
|
* (non-Javadoc)
|
|
512
|
*
|
|
513
|
* @see org.eclipse.jface.viewers.StructuredViewer#refresh(java.lang.Object)
|
|
514
|
*/
|
|
515
|
public void refresh(Object element) {
|
|
516
|
refresh(element, true);
|
|
517
|
}
|
|
518
|
|
|
519
|
/*
|
|
520
|
* (non-Javadoc)
|
|
521
|
*
|
|
522
|
* @see org.eclipse.jface.viewers.StructuredViewer#update(java.lang.Object,
|
|
523
|
* java.lang.String[])
|
|
524
|
*/
|
|
525
|
public void update(Object element, String[] properties) {
|
|
526
|
if(element != getInput()) {
|
|
527
|
INavigatorPipelineService pipeDream = contentService
|
|
528
|
.getPipelineService();
|
|
529
|
|
|
530
|
PipelinedViewerUpdate update = new PipelinedViewerUpdate();
|
|
531
|
update.getRefreshTargets().add(element);
|
|
532
|
update.setUpdateLabels(true);
|
|
533
|
/* if the update is modified */
|
|
534
|
if (pipeDream.interceptUpdate(update)) {
|
|
535
|
/* intercept and apply the update */
|
|
536
|
for (Iterator iter = update.getRefreshTargets().iterator(); iter
|
|
537
|
.hasNext();) {
|
|
538
|
super.update(iter.next(), properties);
|
|
539
|
}
|
|
540
|
} else {
|
|
541
|
super.update(element, properties);
|
|
542
|
}
|
|
543
|
} else {
|
|
544
|
super.update(element, properties);
|
|
545
|
}
|
|
546
|
}
|
|
547
|
|
|
548
|
/*
|
|
549
|
* (non-Javadoc)
|
|
550
|
*
|
|
551
|
* @see java.lang.Object#toString()
|
|
552
|
*/
|
|
553
|
public String toString() {
|
|
554
|
return contentService.toString() + " Viewer"; //$NON-NLS-1$
|
|
555
|
}
|
|
556
|
|
|
557
|
/*
|
|
558
|
* (non-Javadoc)
|
|
559
|
*
|
|
560
|
* @see org.eclipse.jface.viewers.AbstractTreeViewer#internalRefresh(java.lang.Object,
|
|
561
|
* boolean)
|
|
562
|
*/
|
|
563
|
protected void internalRefresh(Object element, boolean updateLabels) {
|
|
564
|
if (element == null && getRoot() == null) {
|
|
565
|
return;
|
|
566
|
}
|
|
567
|
super.internalRefresh(element, updateLabels);
|
|
568
|
}
|
|
569
|
|
|
570
|
/**
|
|
571
|
* @noreference This method is not intended to be referenced by clients.
|
|
572
|
* @nooverride This method is not intended to be re-implemented or extended by clients.
|
|
573
|
* @since 3.4
|
|
574
|
*/
|
|
575
|
public void createFrameList() {
|
|
576
|
CommonNavigatorFrameSource frameSource = new CommonNavigatorFrameSource(commonNavigator);
|
|
577
|
frameList = new FrameList(frameSource);
|
|
578
|
frameSource.connectTo(frameList);
|
|
579
|
}
|
|
580
|
|
|
581
|
/**
|
|
582
|
* @return a FrameList
|
|
583
|
* @noreference This method is not intended to be referenced by clients.
|
|
584
|
* @nooverride This method is not intended to be re-implemented or extended by clients.
|
|
585
|
* @since 3.4
|
|
586
|
*/
|
|
587
|
public FrameList getFrameList() {
|
|
588
|
return frameList;
|
|
589
|
}
|
|
590
|
|
|
591
|
|
|
592
|
}
|