/*******************************************************************************
* Copyright (c) 2003, 2015 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.navigator.extensions;
import java.util.ArrayList;
import java.util.Set;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.ITreePathContentProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.internal.navigator.NavigatorSafeRunnable;
import org.eclipse.ui.navigator.ICommonContentExtensionSite;
import org.eclipse.ui.navigator.ICommonContentProvider;
import org.eclipse.ui.navigator.IMementoAware;
import org.eclipse.ui.navigator.IPipelinedTreeContentProvider;
import org.eclipse.ui.navigator.IPipelinedTreeContentProvider2;
import org.eclipse.ui.navigator.PipelinedShapeModification;
import org.eclipse.ui.navigator.PipelinedViewerUpdate;
/**
* @since 3.2
*/
public class SafeDelegateTreeContentProvider implements
IPipelinedTreeContentProvider2, ITreePathContentProvider {
private static final TreePath[] NO_PATHS = new TreePath[0];
private final ITreeContentProvider contentProvider;
private StructuredViewer viewer;
SafeDelegateTreeContentProvider(ITreeContentProvider aContentProvider) {
super();
contentProvider = aContentProvider;
}
/**
* @return true if the underlying content provider implements IPipelinedTreeContentProvider
*/
public boolean isPipelined() {
return contentProvider instanceof IPipelinedTreeContentProvider;
}
/**
* @return true if the underlying content provider implements IPipelinedTreeContentProviderHasChildren
*/
public boolean isPipelinedHasChildren() {
return contentProvider instanceof IPipelinedTreeContentProvider2;
}
/**
* @return true if the underlying content provider implements ITreePathContentProvider
*/
public boolean isTreePath() {
return contentProvider instanceof ITreePathContentProvider;
}
/**
*
*/
@Override
public void dispose() {
SafeRunner.run(new NavigatorSafeRunnable() {
@Override
public void run() throws Exception {
contentProvider.dispose();
}
});
}
@Override
public boolean equals(Object anObject) {
return contentProvider.equals(anObject);
}
@Override
public Object[] getChildren(Object aParentElement) {
if (aParentElement instanceof TreePath) {
TreePath tp = (TreePath) aParentElement;
return getChildren(tp);
}
Object[] children = contentProvider.getChildren(aParentElement);
return children;
}
@Override
public Object[] getElements(Object anInputElement) {
Object[] elements = contentProvider.getElements(anInputElement);
return elements;
}
@Override
public Object getParent(Object anElement) {
return contentProvider.getParent(anElement);
}
@Override
public boolean hasChildren(Object anElement) {
return contentProvider.hasChildren(anElement);
}
@Override
public int hashCode() {
return contentProvider.hashCode();
}
@Override
public void inputChanged(final Viewer aViewer, final Object anOldInput, final Object aNewInput) {
viewer = (StructuredViewer) aViewer;
SafeRunner.run(new NavigatorSafeRunnable() {
@Override
public void run() throws Exception {
contentProvider.inputChanged(aViewer, anOldInput, aNewInput);
}
});
}
@Override
public String toString() {
return contentProvider.toString();
}
/**
*
* @return The real content provider.
*/
public ITreeContentProvider getDelegateContentProvider() {
return contentProvider;
}
@Override
public void restoreState(IMemento aMemento) {
if (contentProvider != null && contentProvider instanceof IMementoAware) {
((IMementoAware) contentProvider).restoreState(aMemento);
}
}
@Override
public void saveState(IMemento aMemento) {
if (contentProvider != null && contentProvider instanceof IMementoAware) {
((IMementoAware) contentProvider).saveState(aMemento);
}
}
@Override
public void init(ICommonContentExtensionSite aConfig) {
if (contentProvider instanceof ICommonContentProvider) {
((ICommonContentProvider) contentProvider).init(aConfig);
}
}
@Override
public void getPipelinedChildren(Object aParent, Set theCurrentChildren) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
((IPipelinedTreeContentProvider) contentProvider)
.getPipelinedChildren(aParent, theCurrentChildren);
}
}
@Override
public void getPipelinedElements(Object anInput, Set theCurrentElements) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
((IPipelinedTreeContentProvider) contentProvider)
.getPipelinedElements(anInput, theCurrentElements);
}
}
@Override
public Object getPipelinedParent(Object anObject, Object aSuggestedParent) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
return ((IPipelinedTreeContentProvider) contentProvider)
.getPipelinedParent(anObject, aSuggestedParent);
}
return anObject;
}
@Override
public PipelinedShapeModification interceptAdd(
PipelinedShapeModification anAddModification) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
return ((IPipelinedTreeContentProvider) contentProvider)
.interceptAdd(anAddModification);
}
return anAddModification;
}
@Override
public PipelinedShapeModification interceptRemove(
PipelinedShapeModification aRemoveModification) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
return ((IPipelinedTreeContentProvider) contentProvider)
.interceptRemove(aRemoveModification);
}
return aRemoveModification;
}
@Override
public boolean interceptRefresh(
PipelinedViewerUpdate aRefreshSynchronization) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
return ((IPipelinedTreeContentProvider) contentProvider)
.interceptRefresh(aRefreshSynchronization);
}
return false;
}
@Override
public boolean interceptUpdate(
PipelinedViewerUpdate anUpdateSynchronization) {
if (contentProvider instanceof IPipelinedTreeContentProvider) {
return ((IPipelinedTreeContentProvider) contentProvider)
.interceptUpdate(anUpdateSynchronization);
}
return false;
}
@Override
public Object[] getChildren(TreePath parentPath) {
if (contentProvider instanceof ITreePathContentProvider) {
ITreePathContentProvider tpcp = (ITreePathContentProvider) contentProvider;
Object[] children = tpcp.getChildren(parentPath);
return children;
}
return getChildren(parentPath.getLastSegment());
}
@Override
public boolean hasChildren(TreePath path) {
if (contentProvider instanceof ITreePathContentProvider) {
ITreePathContentProvider tpcp = (ITreePathContentProvider) contentProvider;
return tpcp.hasChildren(path);
}
return hasChildren(path.getLastSegment());
}
@Override
public TreePath[] getParents(Object element) {
if (contentProvider instanceof ITreePathContentProvider) {
ITreePathContentProvider tpcp = (ITreePathContentProvider) contentProvider;
return tpcp.getParents(element);
}
ArrayList segments = new ArrayList();
Object parent = element;
do {
parent = contentProvider.getParent(parent);
if (parent != null && parent != viewer.getInput())
segments.add(0, parent);
} while (parent != null && parent != viewer.getInput());
if (!segments.isEmpty()) {
// Loop backwards over the array to create the path.
return new TreePath[] { new TreePath(segments.toArray()) };
}
return NO_PATHS;
}
@Override
public boolean hasPipelinedChildren(Object anInput, boolean currentHasChildren) {
if (contentProvider instanceof IPipelinedTreeContentProvider2) {
return ((IPipelinedTreeContentProvider2) contentProvider)
.hasPipelinedChildren(anInput, currentHasChildren);
}
return currentHasChildren;
}
}