/*******************************************************************************
 * Copyright (c) 2005, 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
 *     QNX Software System
 *     Red Hat Inc. - convert to use with Automake editor
 *******************************************************************************/
package org.eclipse.cdt.internal.autotools.ui.editors.automake;

import org.eclipse.cdt.core.model.ICElement;
import org.eclipse.cdt.internal.autotools.ui.MakeUIImages;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.ViewerSorter;



public class LexicalSortingAction extends Action {
	
	private static final String ACTION_NAME= "LexicalSortingAction"; //$NON-NLS-1$
	private static final String DIALOG_STORE_KEY= ACTION_NAME + ".sort"; //$NON-NLS-1$
	
	private LexicalCSorter fSorter;
	private TreeViewer fTreeViewer;
	
	public LexicalSortingAction(TreeViewer treeViewer) {
		super(CUIPlugin.getResourceString(ACTION_NAME + ".label")); //$NON-NLS-1$
		
		setDescription(CUIPlugin.getResourceString(ACTION_NAME + ".description")); //$NON-NLS-1$
		setToolTipText(CUIPlugin.getResourceString(ACTION_NAME + ".tooltip")); //$NON-NLS-1$
	
		MakeUIImages.setImageDescriptors(this, MakeUIImages.T_TOOL, MakeUIImages.IMG_TOOLS_ALPHA_SORTING);
	
		fTreeViewer= treeViewer;
		fSorter= new LexicalCSorter();
		
		boolean checked= CUIPlugin.getDefault().getDialogSettings().getBoolean(DIALOG_STORE_KEY);
		valueChanged(checked, false);
	}
	
	public void run() {
		valueChanged(isChecked(), true);
	}
	
	private void valueChanged(boolean on, boolean store) {
		setChecked(on);
		fTreeViewer.setSorter(on ? fSorter : null);
		
		String key= ACTION_NAME + ".tooltip" + (on ? ".on" : ".off"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
		setToolTipText(CUIPlugin.getResourceString(key));
		
		if (store) {
			CUIPlugin.getDefault().getDialogSettings().put(DIALOG_STORE_KEY, on);
		}
	}
	
	private static class LexicalCSorter extends ViewerSorter {		
		@SuppressWarnings("unused")
		public boolean isSorterProperty(Object element, Object property) {
			return true;
		}
		
		public int category(Object obj) {
			if (obj instanceof ICElement) {
				ICElement elem= (ICElement)obj;
				switch (elem.getElementType()) {
					case ICElement.C_MACRO: return 1;
					case ICElement.C_INCLUDE: return 2;
					
					case ICElement.C_CLASS: return 3;
					case ICElement.C_STRUCT: return 4;
					case ICElement.C_UNION: return 5;
					
					case ICElement.C_FIELD: return 6;
					case ICElement.C_FUNCTION: return 7;		
				}
				
			}
			return 0;
		}
	}
	
}
