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/*******************************************************************************
* Copyright (c) 2004 - 2005 University Of British Columbia 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:
* University Of British Columbia - initial API and implementation
*******************************************************************************/
package org.eclipse.mylar.internal.tasklist.ui.views;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.mylar.internal.tasklist.MylarTaskListPlugin;
import org.eclipse.mylar.internal.tasklist.Task;
import org.eclipse.mylar.internal.tasklist.ui.AbstractTaskFilter;
import org.eclipse.mylar.internal.tasklist.ui.ITaskListElement;
import org.eclipse.mylar.tasklist.ITask;
import org.eclipse.mylar.tasklist.ITaskCategory;
import org.eclipse.mylar.tasklist.IRepositoryQuery;
import org.eclipse.swt.widgets.Text;
/**
* @author Mik Kersten
*/
public class TasklistContentProvider implements IStructuredContentProvider, ITreeContentProvider {
private final TaskListView view;
private static class ContentTaskFilter extends AbstractTaskFilter {
@Override
public boolean select(Object element) {
return true;
}
@Override
public boolean shouldAlwaysShow(ITask task) {
return super.shouldAlwaysShow(task);
}
};
private ContentTaskFilter contentTaskFilter = new ContentTaskFilter();
public TasklistContentProvider(TaskListView view) {
this.view = view;
}
public void inputChanged(Viewer v, Object oldInput, Object newInput) {
this.view.expandToActiveTasks();
}
public void dispose() {
// ignore
}
public Object[] getElements(Object parent) {
if (parent.equals(this.view.getViewSite())) {
return applyFilter(MylarTaskListPlugin.getTaskListManager().getTaskList().getRoots()).toArray();
}
return getChildren(parent);
}
public Object getParent(Object child) {
if (child instanceof ITask) {
if (((ITask) child).getParent() != null) {
return ((ITask) child).getParent();
} else {
return ((ITask) child).getCategory();
}
}
return null;
}
public Object[] getChildren(Object parent) {
return getFilteredChildrenFor(parent).toArray();
}
public boolean hasChildren(Object parent) {
if (parent instanceof ITaskCategory) {
ITaskCategory cat = (ITaskCategory) parent;
return cat.getChildren() != null && cat.getChildren().size() > 0;
} else if (parent instanceof Task) {
Task t = (Task) parent;
return t.getChildren() != null && t.getChildren().size() > 0;
} else if (parent instanceof IRepositoryQuery) {
IRepositoryQuery t = (IRepositoryQuery) parent;
return t.getHits() != null && t.getHits().size() > 0;
}
return false;
}
private List<Object> applyFilter(List<Object> list) {
String filterText = ((Text) this.view.tree.getFilterControl()).getText();
if (containsNoFilterText(filterText)) {
List<Object> filteredRoots = new ArrayList<Object>();
for (int i = 0; i < list.size(); i++) {
if (list.get(i) instanceof ITask) {
if (!filter(list.get(i))) {
filteredRoots.add(list.get(i));
}
} else if (list.get(i) instanceof ITaskCategory) {
// if(((ITaskCategory)list.get(i)).isArchive())
// continue;
if (selectCategory((ITaskCategory) list.get(i))) {
filteredRoots.add(list.get(i));
}
} else if (list.get(i) instanceof IRepositoryQuery) {
if (selectQuery((IRepositoryQuery) list.get(i))) {
filteredRoots.add(list.get(i));
}
}
}
return filteredRoots;
} else {
return list;
}
}
/**
* See bug 109693
*/
private boolean containsNoFilterText(String filterText) {
return filterText == null || filterText.length() == 0;
}
private boolean selectQuery(IRepositoryQuery cat) {
List<? extends ITaskListElement> list = cat.getHits();
if (list.size() == 0) {
return true;
}
for (int i = 0; i < list.size(); i++) {
if (!filter(list.get(i))) {
return true;
}
}
return false;
}
private boolean selectCategory(ITaskCategory cat) {
if (cat.isArchive()) {
for (ITask task : cat.getChildren()) {
if (contentTaskFilter.shouldAlwaysShow(task)) {
ITask t = MylarTaskListPlugin.getTaskListManager().getTaskForHandle(task.getHandleIdentifier(),
false);
if (t == null)
return true;
}
}
return false;
}
List<? extends ITaskListElement> list = cat.getChildren();
if (list.size() == 0) {
return true;
}
for (int i = 0; i < list.size(); i++) {
if (!filter(list.get(i))) {
return true;
}
}
return false;
}
private List<Object> getFilteredChildrenFor(Object parent) {
if (containsNoFilterText(((Text) this.view.tree.getFilterControl()).getText())
|| ((Text) this.view.tree.getFilterControl()).getText().startsWith(TaskListView.FILTER_LABEL)) {
List<Object> children = new ArrayList<Object>();
if (parent instanceof ITaskCategory) {
if (((ITaskCategory) parent).isArchive()) {
for (ITask task : ((ITaskCategory) parent).getChildren()) {
if (contentTaskFilter.shouldAlwaysShow(task)) {
ITask t = MylarTaskListPlugin.getTaskListManager().getTaskForHandle(
task.getHandleIdentifier(), false);
if (t == null)
children.add(task);
}
}
return children;
}
List<? extends ITaskListElement> list = ((ITaskCategory) parent).getChildren();
for (int i = 0; i < list.size(); i++) {
if (!filter(list.get(i))) {
children.add(list.get(i));
}
}
return children;
} else if (parent instanceof IRepositoryQuery) {
List<? extends ITaskListElement> list = ((IRepositoryQuery) parent).getHits();
for (int i = 0; i < list.size(); i++) {
if (!filter(list.get(i))) {
children.add(list.get(i));
}
}
return children;
} else if (parent instanceof Task) {
List<ITask> subTasks = ((Task) parent).getChildren();
for (ITask t : subTasks) {
if (!filter(t)) {
children.add(t);
}
}
return children;
}
} else {
List<Object> children = new ArrayList<Object>();
if (parent instanceof ITaskCategory) {
children.addAll(((ITaskCategory) parent).getChildren());
return children;
} else if (parent instanceof IRepositoryQuery) {
children.addAll(((IRepositoryQuery) parent).getHits());
return children;
} else if (parent instanceof Task) {
children.addAll(((Task) parent).getChildren());
return children;
}
}
return new ArrayList<Object>();
}
private boolean filter(Object obj) {
for (AbstractTaskFilter filter : this.view.filters) {
if (!filter.select(obj)) {
return true;
}
}
return false;
}
}
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