/*******************************************************************************
 * Copyright (c) 2001, 2006 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
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.xml.ui.internal.actions;

import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.wst.xml.ui.internal.XMLUIMessages;
import org.eclipse.wst.xml.ui.internal.XMLUIPlugin;
import org.eclipse.wst.xml.ui.internal.dialogs.EditProcessingInstructionDialog;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.ProcessingInstruction;

/**
 * EditProcessingInstructionAction
 */
public class EditProcessingInstructionAction extends NodeAction {
	protected Node childRef;
	protected AbstractNodeActionManager manager;
	protected Node parent;
	protected ProcessingInstruction pi;
	protected String title;

	/**
	 * This constructor is used to add a new ProcessingInstruction
	 */
	public EditProcessingInstructionAction(AbstractNodeActionManager manager, Node parent, Node childRef, String actionLabel, String title) {
		setText(actionLabel);
		this.manager = manager;
		this.parent = parent;
		this.childRef = childRef;
		this.title = title;
	}

	/**
	 * This constructor is used to edit a ProcessingInstruction
	 */
	public EditProcessingInstructionAction(AbstractNodeActionManager manager, ProcessingInstruction pi, String actionLabel, String title) {
		setText(actionLabel);
		this.manager = manager;
		this.pi = pi;
		this.parent = pi.getParentNode();
		this.title = title;
	}

	public String getUndoDescription() {
		return title;
	}

	public void run() {
		manager.beginNodeAction(this);
		Shell shell = XMLUIPlugin.getInstance().getWorkbench().getActiveWorkbenchWindow().getShell();

		EditProcessingInstructionDialog dialog = null;
		if (pi != null) {
			dialog = new EditProcessingInstructionDialog(shell, pi);
		}
		else {
			dialog = new EditProcessingInstructionDialog(shell, XMLUIMessages._UI_PI_TARGET_VALUE, XMLUIMessages._UI_PI_DATA_VALUE);
		}

		dialog.create();
		dialog.getShell().setText(title);
		dialog.setBlockOnOpen(true);
		dialog.open();

		if (dialog.getReturnCode() == Window.OK) {
			if (pi != null) {
				childRef = pi;
			}

			Document document = parent.getNodeType() == Node.DOCUMENT_NODE ? (Document) parent : parent.getOwnerDocument();
			Node newNode = document.createProcessingInstruction(dialog.getTarget(), dialog.getData());
			parent.insertBefore(newNode, childRef);

			if (pi != null) {
				parent.removeChild(pi);
			}

			manager.reformat(newNode, false);
			manager.setViewerSelection(newNode);
		}
		manager.endNodeAction(this);
	}
}