/*
Copyright 2012 GanttProject Team
This file is part of GanttProject, an opensource project management tool.
GanttProject is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GanttProject is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sourceforge.ganttproject.action.task;
import java.util.Collection;
import net.sourceforge.ganttproject.task.Task;
import net.sourceforge.ganttproject.task.TaskContainmentHierarchyFacade;
import net.sourceforge.ganttproject.task.TaskManager;
import com.google.common.base.Function;
/**
* Creates functions resolving move target for indent operations. Function depends on the set of tasks being moved so
* it is different every time
*
* @author dbarashev
*/
class IndentTargetFunctionFactory implements Function<Collection<Task>, Function<Task, Task>> {
private final TaskManager myTaskManager;
IndentTargetFunctionFactory(TaskManager taskManager) {
myTaskManager = taskManager;
}
@Override
public Function<Task, Task> apply(final Collection<Task> indentRoots) {
return new Function<Task, Task>() {
private final TaskContainmentHierarchyFacade myTaskHierarchy = myTaskManager.getTaskHierarchy();
@Override
public Task apply(Task whatMove) {
Task moveTarget = whatMove;
for (; moveTarget != null && indentRoots.contains(moveTarget);
moveTarget = myTaskHierarchy.getPreviousSibling(moveTarget));
return moveTarget;
}
};
}
};