| /******************************************************************************* |
| * Copyright (c) 2008 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.ua.ui.editor.ctxhelp.details; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.pde.internal.ua.core.ctxhelp.text.CtxHelpObject; |
| |
| /** |
| * The action used to remove one or more elements from the context help xml. |
| * @since 3.4 |
| */ |
| public class CtxHelpRemoveAction extends Action { |
| |
| private CtxHelpObject[] fObjects; |
| |
| //The next object to be selected after the |
| //selected object is removed |
| private CtxHelpObject fObjectToSelect; |
| |
| public CtxHelpRemoveAction() { |
| // Adds the 'Delete' keybinding to the action when displayed |
| // in a context menu |
| setActionDefinitionId("org.eclipse.ui.edit.delete"); //$NON-NLS-1$ |
| setText(CtxHelpDetailsMessages.CtxHelpRemoveAction_remove); |
| } |
| |
| /** |
| * Sets the objects to be removed when this action is run. |
| * @param objects objects to remove |
| */ |
| public void setToRemove(CtxHelpObject[] objects) { |
| fObjects = objects; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.action.Action#run() |
| */ |
| public void run() { |
| if (fObjects == null) |
| return; |
| |
| for (int i = 0; i < fObjects.length; ++i) { |
| if (fObjects[i] != null && fObjects[i].canBeRemoved()) { |
| CtxHelpObject parent = fObjects[i].getParent(); |
| if (parent != null) { |
| determineNextSelection(parent, i); |
| parent.removeChild(fObjects[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(CtxHelpObject parent, int index) { |
| // Select the next sibling |
| fObjectToSelect = parent.getNextSibling(fObjects[index]); |
| if (fObjectToSelect == null) { |
| // No next sibling |
| // Select the previous sibling |
| fObjectToSelect = parent.getPreviousSibling(fObjects[index]); |
| if (fObjectToSelect == null) { |
| // No previous sibling |
| // Select the parent |
| fObjectToSelect = parent; |
| } |
| } |
| } |
| |
| /** |
| * Returns the object that should be selected after the action is run. |
| * @return the object to select or <code>null</code> |
| */ |
| public CtxHelpObject getNextSelection() { |
| return fObjectToSelect; |
| } |
| |
| /** |
| * Clears the next selection returned by {@link #getNextSelection()}. |
| */ |
| public void clearNextSelection() { |
| fObjectToSelect = null; |
| } |
| |
| } |