/*******************************************************************************
 * Copyright (c) 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
 ******************************************************************************/

package org.eclipse.ui.examples.navigator.actions;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.FindReplaceDocumentAdapter;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.examples.navigator.PropertiesTreeData;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.internal.examples.navigator.Activator;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.ITextEditor;

/**
 * @since 3.2
 *
 */
public class OpenPropertyAction extends Action {
	
	private IWorkbenchPage page;
	private PropertiesTreeData data;
	private ISelectionProvider provider; 


	/**
	 * Construct the OpenPropertyAction with the given page. 
	 * @param p The page to use as context to open the editor.
	 * @param selectionProvider The selection provider 
	 */
	public OpenPropertyAction(IWorkbenchPage p, ISelectionProvider selectionProvider) {
		setText("Open Property"); //$NON-NLS-1$
		page = p;
		provider = selectionProvider;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.Action#isEnabled()
	 */
	public boolean isEnabled() {
		ISelection selection = provider.getSelection();
		if(!selection.isEmpty()) {
			IStructuredSelection sSelection = (IStructuredSelection) selection;
			if(sSelection.size() == 1 && 
			   sSelection.getFirstElement() instanceof PropertiesTreeData) 
			{
				data = ((PropertiesTreeData)sSelection.getFirstElement()); 				
				return true;
			}
		}
		return false;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.Action#run()
	 */
	public void run() { 
		/* In production code, you should always externalize strings, 
		 * 	but this is an example. */
		try {
			if(isEnabled()) {
				IFile propertiesFile = data.getFile();
				IEditorPart editor = IDE.openEditor(page, propertiesFile); 
				
				if (editor instanceof ITextEditor) {
					ITextEditor textEditor = (ITextEditor) editor;
					
					IDocumentProvider documentProvider = 
						textEditor.getDocumentProvider();
					IDocument document = 
						documentProvider.getDocument(editor.getEditorInput());
					
					FindReplaceDocumentAdapter searchAdapter = 
						new FindReplaceDocumentAdapter(document);
					
					try {
						String searchText = data.getName()+"="; //$NON-NLS-1$ 
						IRegion region = searchAdapter.find(0, 
															searchText, 
															true /* forwardSearch */, 
															true /* caseSensitive */, 
															false /* wholeWord */, 
															false /* regExSearch */); 
						
						((ITextEditor)editor).selectAndReveal(region.getOffset(), region.getLength());
						
					} catch (BadLocationException e) {
						Activator.logError(0, "Could not open property!", e); //$NON-NLS-1$
						MessageDialog.openError(Display.getDefault().getActiveShell(), 
				 				"Error Opening Property",  //$NON-NLS-1$
				 				"Could not open property!");   //$NON-NLS-1$
					}
					return;
				}
			} 
		} catch (PartInitException e) { 
			Activator.logError(0, "Could not open property!", e); //$NON-NLS-1$
			MessageDialog.openError(Display.getDefault().getActiveShell(), 
	 				"Error Opening Property",  //$NON-NLS-1$
	 				"Could not open property!");   //$NON-NLS-1$
		}
	}
}