/*******************************************************************************
* Copyright (c) 2000, 2017 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
*
*******************************************************************************/
package org.eclipse.dltk.internal.ui.scriptview;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.dltk.core.DLTKCore;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.core.IScriptModel;
import org.eclipse.dltk.core.IScriptProject;
import org.eclipse.dltk.internal.ui.navigator.ScriptExplorerContentProvider;
import org.eclipse.dltk.internal.ui.workingsets.WorkingSetIDs;
import org.eclipse.dltk.internal.ui.workingsets.WorkingSetModel;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.IWorkingSetManager;
public abstract class WorkingSetAwareContentProvider
extends ScriptExplorerContentProvider
implements IMultiElementTreeContentProvider {
private WorkingSetModel fWorkingSetModel;
private IPropertyChangeListener fListener;
public WorkingSetAwareContentProvider(boolean provideMembers,
WorkingSetModel model) {
super(provideMembers);
fWorkingSetModel = model;
fListener = event -> workingSetModelChanged(event);
fWorkingSetModel.addPropertyChangeListener(fListener);
}
@Override
public void dispose() {
fWorkingSetModel.removePropertyChangeListener(fListener);
super.dispose();
}
@Override
public boolean hasChildren(Object element) {
if (element instanceof IWorkingSet)
return true;
return super.hasChildren(element);
}
@Override
public Object[] getChildren(Object element) {
Object[] children;
if (element instanceof WorkingSetModel) {
Assert.isTrue(fWorkingSetModel == element);
return fWorkingSetModel.getActiveWorkingSets();
} else if (element instanceof IWorkingSet) {
children = getWorkingSetChildren((IWorkingSet) element);
} else {
children = super.getChildren(element);
}
return children;
}
private Object[] getWorkingSetChildren(IWorkingSet set) {
IAdaptable[] elements = fWorkingSetModel.getChildren(set);
boolean isKnownWorkingSet = isKnownWorkingSet(set);
List result = new ArrayList(elements.length);
for (int i = 0; i < elements.length; i++) {
IAdaptable element = elements[i];
boolean add = false;
if (element instanceof IProject) {
add = true;
} else if (element instanceof IResource) {
IProject project = ((IResource) element).getProject();
add = project == null || project.isOpen();
} else if (element instanceof IScriptProject) {
add = true;
} else if (element instanceof IModelElement) {
IProject project = getProject((IModelElement) element);
add = project == null || project.isOpen();
}
if (add) {
if (isKnownWorkingSet) {
result.add(element);
} else {
IProject project = element.getAdapter(IProject.class);
if (project != null && project.exists()) {
IScriptProject jp = DLTKCore.create(project);
if (jp != null && jp.exists()) {
result.add(jp);
} else {
result.add(project);
}
}
}
}
}
return result.toArray();
}
private boolean isKnownWorkingSet(IWorkingSet set) {
String id = set.getId();
return WorkingSetIDs.OTHERS.equals(id)
|| WorkingSetIDs.SCRIPT.equals(id)
|| WorkingSetIDs.RESOURCE.equals(id);
}
private IProject getProject(IModelElement element) {
if (element == null)
return null;
IScriptProject project = element.getScriptProject();
if (project == null)
return null;
return project.getProject();
}
/**
* {@inheritDoc}
*/
@Override
public TreePath[] getTreePaths(Object element) {
if (element instanceof IWorkingSet) {
TreePath path = new TreePath(new Object[] { element });
return new TreePath[] { path };
}
List modelParents = getModelPath(element);
List<TreePath> result = new ArrayList<>();
for (int i = 0; i < modelParents.size(); i++) {
result.addAll(getTreePaths(modelParents, i));
}
return result.toArray(new TreePath[result.size()]);
}
private List getModelPath(Object element) {
List result = new ArrayList();
result.add(element);
Object parent = super.getParent(element);
Object input = getViewerInput();
// stop at input or on ScriptModel. We never visualize it anyway.
while (parent != null && !parent.equals(input)
&& !(parent instanceof IScriptModel)) {
result.add(parent);
parent = super.getParent(parent);
}
Collections.reverse(result);
return result;
}
private List<TreePath> getTreePaths(List modelParents, int index) {
List<TreePath> result = new ArrayList<>();
Object input = getViewerInput();
Object element = modelParents.get(index);
Object[] parents = fWorkingSetModel.getAllParents(element);
for (int i = 0; i < parents.length; i++) {
List chain = new ArrayList();
if (!parents[i].equals(input))
chain.add(parents[i]);
for (int m = index; m < modelParents.size(); m++) {
chain.add(modelParents.get(m));
}
result.add(new TreePath(chain.toArray()));
}
return result;
}
@Override
public Object getParent(Object child) {
Object parent = getExtendedParent(child);
if (parent != null) {
return parent;
}
Object[] parents = fWorkingSetModel.getAllParents(child);
if (parents.length == 0)
return super.getParent(child);
Object first = parents[0];
return first;
}
@Override
protected void augmentElementToRefresh(List toRefresh, int relation,
Object affectedElement) {
// we are refreshing the ScriptModel and are in working set mode.
if (DLTKCore.create(ResourcesPlugin.getWorkspace().getRoot())
.equals(affectedElement)) {
toRefresh.remove(affectedElement);
toRefresh.add(fWorkingSetModel);
} else if (relation == GRANT_PARENT) {
Object parent = internalGetParent(affectedElement);
if (parent != null) {
toRefresh.addAll(
Arrays.asList(fWorkingSetModel.getAllParents(parent)));
}
}
List nonProjetTopLevelElemens = fWorkingSetModel
.getNonProjectTopLevelElements();
if (nonProjetTopLevelElemens.isEmpty())
return;
List toAdd = new ArrayList();
for (Iterator iter = nonProjetTopLevelElemens.iterator(); iter
.hasNext();) {
Object element = iter.next();
if (isChildOf(element, toRefresh))
toAdd.add(element);
}
toRefresh.addAll(toAdd);
}
private void workingSetModelChanged(PropertyChangeEvent event) {
String property = event.getProperty();
Object newValue = event.getNewValue();
List toRefresh = new ArrayList(1);
if (WorkingSetModel.CHANGE_WORKING_SET_MODEL_CONTENT.equals(property)) {
toRefresh.add(fWorkingSetModel);
} else if (IWorkingSetManager.CHANGE_WORKING_SET_CONTENT_CHANGE
.equals(property)) {
toRefresh.add(newValue);
} else if (IWorkingSetManager.CHANGE_WORKING_SET_NAME_CHANGE
.equals(property)) {
toRefresh.add(newValue);
}
ArrayList runnables = new ArrayList();
postRefresh(toRefresh, true, runnables);
executeRunnables(runnables);
}
private boolean isChildOf(Object element, List potentialParents) {
// Calling super get parent to bypass working set mapping
Object parent = super.getParent(element);
if (parent == null)
return false;
for (Iterator iter = potentialParents.iterator(); iter.hasNext();) {
Object potentialParent = iter.next();
while (parent != null) {
if (parent.equals(potentialParent))
return true;
parent = super.getParent(parent);
}
}
return false;
}
}