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/*******************************************************************************
* Copyright (c) 2004, 2008 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui;
import java.util.Collection;
import org.eclipse.mylyn.internal.tasks.core.ITasksCoreConstants;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.mylyn.tasks.core.ITaskContainer;
/**
* Custom filters are used so that the "Find:" filter can 'see through' any filters that may have been applied.
*
* @author Mik Kersten
*/
// XXX duplicate implementation in hasDescendantIncoming/hasIncompleteDescendant: consider replacing this by a visitor
public abstract class AbstractTaskListFilter {
public abstract boolean select(Object parent, Object element);
/**
* @return true if this filter should be applied even with filter text is present
*/
public boolean applyToFilteredText() {
return false;
}
/**
* NOTE: performance implication of looking down children
*
* TODO: Move to an internal utility class
*/
public static boolean hasDescendantIncoming(ITaskContainer container) {
return hasDescendantIncoming(container, ITasksCoreConstants.MAX_SUBTASK_DEPTH);
}
public static boolean hasIncompleteDescendant(ITaskContainer container) {
return hasIncompleteDescendant(container, ITasksCoreConstants.MAX_SUBTASK_DEPTH);
}
private static boolean hasDescendantIncoming(ITaskContainer container, int depth) {
Collection<ITask> children = container.getChildren();
if (children == null || depth <= 0) {
return false;
}
for (ITask task : children) {
if (task != null) {
ITask containedRepositoryTask = task;
if (containedRepositoryTask.getSynchronizationState().isIncoming()) {
return true;
} else if (TasksUiPlugin.getDefault().groupSubtasks(container) && task instanceof ITaskContainer
&& hasDescendantIncoming((ITaskContainer) task, depth - 1)) {
return true;
}
}
}
return false;
}
private static boolean hasIncompleteDescendant(ITaskContainer container, int depth) {
Collection<ITask> children = container.getChildren();
if (children == null || depth <= 0) {
return false;
}
for (ITask task : children) {
if (task != null) {
ITask containedRepositoryTask = task;
if (!containedRepositoryTask.isCompleted()) {
return true;
} else if (task instanceof ITaskContainer && hasIncompleteDescendant((ITaskContainer) task, depth - 1)) {
return true;
}
}
}
return false;
}
}
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