/*
 * Copyright (c) 2003-2004 Christopher Lenz and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     Christopher Lenz - initial API and implementation
 * 
 * $Id: CssNode.java,v 1.1 2004-09-02 18:11:49 jsurfer Exp $
 */

package net.sourceforge.phpeclipse.css.ui.internal.compare;

import net.sourceforge.phpeclipse.css.ui.CssUI;
import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;

import org.eclipse.compare.ITypedElement;
import org.eclipse.compare.structuremergeviewer.DocumentRangeNode;
import org.eclipse.jface.text.IDocument;
import org.eclipse.swt.graphics.Image;

/**
 * 
 */
public class CssNode extends DocumentRangeNode implements ITypedElement {

	// Constants ---------------------------------------------------------------

	/**
	 * Type code for the top-level style sheet.
	 */
	public static final int STYLE_SHEET = 0;

	/**
	 * Type code for at rules.
	 */
	public static final int AT_RULE = 1;

	/**
	 * Type code for style rules.
	 */
	public static final int STYLE_RULE = 2;

	/**
	 * Type code for declarations (property-value assignment).
	 */
	public static final int DECLARATION = 3;

	// Instance Variables ------------------------------------------------------

	/**
	 * The display name of the node.
	 */
	private String name;

	// Constructors ------------------------------------------------------------

	/**
	 * Constructor for the top-level style sheet node.
	 * 
	 * @param document The document
	 */
	public CssNode(IDocument document) {
		super(STYLE_SHEET, "root", document, 0, //$NON-NLS-1$
			document.getLength());
	}

	/**
	 * Constructor.
	 * 
	 * @param parent 
	 * @param typeCode
	 * @param id
	 * @param name
	 * @param start
	 * @param length
	 */
	public CssNode(CssNode parent, int typeCode, String id, String name,
		int start, int length) {
		super(typeCode, parent.getId() + Integer.toString(typeCode) + id,
			parent.getDocument(), start, length);
		this.name = name;
	}

	/**
	 * @see org.eclipse.compare.ITypedElement#getName()
	 */
	public String getName() {
		if (getTypeCode() == STYLE_SHEET) {
			return CssUIMessages.getString(
				"CssStructureViewer.styleSheet"); //$NON-NLS-1$
		}
		return name;
	}

	/**
	 * @see org.eclipse.compare.ITypedElement#getImage()
	 */
	public Image getImage() {
		String key = null;
		switch (getTypeCode()) {
			case STYLE_SHEET: {
				key = CssUI.ICON_STYLE_SHEET;
				break;
			}
			case AT_RULE: {
				key = CssUI.ICON_AT_RULE;
				break;
			}
			case STYLE_RULE: {
				key = CssUI.ICON_STYLE_RULE;
				break;
			}
			case DECLARATION: {
				key = CssUI.ICON_PROPERTY;
				break;
			}
			default: {
				// we'll just return null
			}
		}
		return CssUI.getDefault().getImageRegistry().get(key);
	}

	/**
	 * @see org.eclipse.compare.ITypedElement#getType()
	 */
	public String getType() {
		return "css"; //$NON-NLS-1$
	}

}