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/*
* Copyright (c) 2014 Eike Stepper (Loehne, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v20.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.oomph.setup.ui.actions;
import org.eclipse.oomph.setup.SetupTaskContainer;
import org.eclipse.oomph.ui.UIUtil;
import org.eclipse.emf.common.command.CommandStack;
import org.eclipse.emf.common.ui.viewer.IViewerProvider;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.ChangeCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
*/
public abstract class AbstractContainerAction extends Action
{
private ISelectionProvider selectionProvider;
private SetupTaskContainer container;
public AbstractContainerAction()
{
}
public AbstractContainerAction(String text, ImageDescriptor image)
{
super(text, image);
}
public AbstractContainerAction(String text, int style)
{
super(text, style);
}
public AbstractContainerAction(String text)
{
super(text);
}
public final ISelectionProvider getSelectionProvider()
{
return selectionProvider;
}
public final SetupTaskContainer getContainer()
{
return container;
}
public final void selectionChanged(SelectionChangedEvent event)
{
if (getStyle() != AS_CHECK_BOX || !isChecked())
{
selectionProvider = event.getSelectionProvider();
ISelection selection = event.getSelection();
if (selection instanceof IStructuredSelection)
{
IStructuredSelection structuredSelection = (IStructuredSelection)selection;
if (structuredSelection.size() == 1)
{
Object element = structuredSelection.getFirstElement();
if (element instanceof EObject)
{
container = getSetupTaskContainer((EObject)element);
if (container != null)
{
setEnabled(true);
return;
}
}
}
}
container = null;
setEnabled(false);
}
}
@Override
public final void run()
{
if (getStyle() == AS_PUSH_BUTTON || isChecked())
{
if (runInit(container))
{
ChangeCommand command = new ChangeCommand(container.eResource())
{
@Override
protected void doExecute()
{
runModify(container);
}
};
EditingDomain editingDomain = AdapterFactoryEditingDomain.getEditingDomainFor(container);
CommandStack commandStack = editingDomain.getCommandStack();
commandStack.execute(command);
runDone(container);
if (getStyle() == AS_CHECK_BOX)
{
setChecked(false);
}
}
}
}
protected boolean runInit(SetupTaskContainer container)
{
return true;
}
protected abstract void runModify(SetupTaskContainer container);
protected void runDone(SetupTaskContainer container)
{
expandItem(container);
}
protected final void expandItem(final EObject object)
{
if (selectionProvider instanceof IViewerProvider)
{
IViewerProvider viewerProvider = (IViewerProvider)selectionProvider;
final Viewer viewer = viewerProvider.getViewer();
if (viewer instanceof TreeViewer)
{
UIUtil.getDisplay().asyncExec(new Runnable()
{
public void run()
{
TreeViewer treeViewer = (TreeViewer)viewer;
expand(treeViewer, object);
IStructuredSelection selection = (IStructuredSelection)treeViewer.getSelection();
@SuppressWarnings("unchecked")
List<Object> list = selection.toList();
list = new ArrayList<Object>(list);
list.add(object);
treeViewer.setSelection(new StructuredSelection(list));
}
private void expand(TreeViewer treeViewer, EObject object)
{
treeViewer.setExpandedState(object, true);
EObject eContainer = object.eContainer();
if (eContainer != null)
{
expand(treeViewer, eContainer);
}
}
});
}
}
}
private SetupTaskContainer getSetupTaskContainer(EObject object)
{
while (object != null && !(object instanceof SetupTaskContainer))
{
object = object.eContainer();
}
return (SetupTaskContainer)object;
}
}
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