/*******************************************************************************
* Copyright (c) 2007 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.pde.internal.ui.editor.toc.actions;
import org.eclipse.jface.action.Action;
import org.eclipse.pde.internal.core.text.toc.TocObject;
import org.eclipse.pde.internal.core.text.toc.TocTopic;
import org.eclipse.pde.internal.ui.PDEUIMessages;
public class TocRemoveObjectAction extends Action {
//The object designated for removal
private TocObject[] fTocObjects;
//The next object to be selected after the
//selected object is removed
private TocObject fObjectToSelect;
public TocRemoveObjectAction() {
// Adds the 'Delete' keybinding to the action when displayed
// in a context menu
setActionDefinitionId("org.eclipse.ui.edit.delete"); //$NON-NLS-1$
setText(PDEUIMessages.TocPage_remove);
fTocObjects = null;
fObjectToSelect = null;
}
/**
* @param tocObjects the objects to remove
*/
public void setToRemove(TocObject[] tocObjects) {
fTocObjects = tocObjects;
}
/**
* @param tocObject the object to remove
*/
public void setToRemove(TocObject tocObject) {
fTocObjects = new TocObject[] { tocObject };
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.Action#run()
*/
public void run() {
if (fTocObjects == null) return;
for(int i = 0; i < fTocObjects.length; ++i)
{ if (fTocObjects[i] != null && fTocObjects[i].canBeRemoved()) {
TocObject parent = fTocObjects[i].getParent();
if (parent != null && parent.canBeParent()) {
// Determine the object to select after the deletion
// takes place
determineNextSelection(parent, i);
// Remove the TOC object
((TocTopic)parent).removeChild(fTocObjects[i]);
}
}
}
}
/**
* Determine the next object that should be selected
* after the designated object has been removed
*
* @param parent The parent of the deleted object
*/
private void determineNextSelection(TocObject parent, int index) {
// Select the next sibling
fObjectToSelect = parent.getNextSibling(fTocObjects[index]);
if (fObjectToSelect == null) {
// No next sibling
// Select the previous sibling
fObjectToSelect = parent.getPreviousSibling(fTocObjects[index]);
if (fObjectToSelect == null) {
// No previous sibling
// Select the parent
fObjectToSelect = parent;
}
}
}
/**
* @return the object that should be selected
* after the current one is removed
*/
public TocObject getNextSelection() {
return fObjectToSelect;
}
}
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