/*******************************************************************************
 * Copyright (c) 2007, 2009 Wind River Systems, Inc. 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:
 *    Markus Schorn - initial API and implementation
 *******************************************************************************/ 
package org.eclipse.cdt.internal.ui.search.actions;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.window.Window;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.IWorkingSetManager;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.IWorkingSetSelectionDialog;

import org.eclipse.cdt.core.model.ICElement;

import org.eclipse.cdt.internal.ui.editor.CEditor;
import org.eclipse.cdt.internal.ui.search.CSearchMessages;
import org.eclipse.cdt.internal.ui.search.CSearchUtil;
import org.eclipse.cdt.internal.ui.util.Messages;

public abstract class FindInWorkingSetAction extends FindAction {
	
	private IWorkingSet[] fWorkingSets;
	private String scopeDescription = ""; //$NON-NLS-1$
	
	public FindInWorkingSetAction(CEditor editor, String label, String tooltip, IWorkingSet[] workingSets) {
		super(editor);
		setText(label); 
		setToolTipText(tooltip); 
		fWorkingSets = workingSets;
	}
	
	public FindInWorkingSetAction(IWorkbenchSite site, String label, String tooltip, IWorkingSet[] workingSets){
		super(site);
		setText(label); 
		setToolTipText(tooltip); 
		fWorkingSets= workingSets;
	}
	
	@Override
	final public void run() {
		IWorkingSet[] initial= fWorkingSets;
		if (fWorkingSets == null) {
			fWorkingSets= askForWorkingSets();
		}
		if (fWorkingSets != null) {
			scopeDescription = Messages.format(CSearchMessages.WorkingSetScope, CSearchUtil.toString(fWorkingSets)); 
			super.run();
		}
		fWorkingSets= initial;
	}

	@Override
	final protected String getScopeDescription() {
		return scopeDescription;
	}

	@Override
	final protected ICElement[] getScope() {
		if (fWorkingSets == null) {
			return new ICElement[0];
		}
		List<ICElement> scope = new ArrayList<ICElement>();
		for (int i = 0; i < fWorkingSets.length; ++i) {
			IAdaptable[] elements = fWorkingSets[i].getElements();
			for (int j = 0; j < elements.length; ++j) {
				ICElement element = (ICElement)elements[j].getAdapter(ICElement.class);
				if (element != null)
					scope.add(element);
			}
		}
		
		return scope.toArray(new ICElement[scope.size()]);
	}
	
	private IWorkingSet[] askForWorkingSets() {
		IWorkingSetManager wsm= PlatformUI.getWorkbench().getWorkingSetManager();
		IWorkingSetSelectionDialog dlg= 
			wsm.createWorkingSetSelectionDialog(getSite().getShell(), true);
		IWorkingSet[] mru= wsm.getRecentWorkingSets();
		if (mru != null && mru.length > 0) {
			dlg.setSelection(new IWorkingSet[] {mru[0]});
		}
		if (dlg.open() == Window.OK) {
			mru= dlg.getSelection();
			if (mru != null && mru.length == 1) {
				wsm.addRecentWorkingSet(mru[0]);
			}
			return mru;
		}
		return null;
	}
}
