/*******************************************************************************
 * Copyright (c) 2008, 2015 Angelo Zerr 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:
 *     Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 *******************************************************************************/
package org.eclipse.e4.ui.css.core.impl.engine;

import java.util.HashMap;
import java.util.Map;
import org.eclipse.e4.ui.css.core.dom.CSSStylableElement;
import org.eclipse.e4.ui.css.core.dom.IElementProvider;
import org.eclipse.e4.ui.css.core.engine.CSSElementContext;
import org.w3c.dom.Element;

public class CSSElementContextImpl implements CSSElementContext {

	private Element element;

	private Map<Object, Object> datas;

	private IElementProvider elementProvider;

	public CSSElementContextImpl() {

	}

	@Override
	public void setData(Object key, Object value) {
		if (datas == null) {
			datas = new HashMap<>();
		}
		datas.put(key, value);
	}

	@Override
	public Object getData(Object key) {
		if (datas == null) {
			return null;
		}
		return datas.get(key);
	}

	@Override
	public Element getElement() {
		return element;
	}

	@Override
	public void setElement(Element newElement) {
		if (element != null && element instanceof CSSStylableElement && newElement instanceof CSSStylableElement) {
			((CSSStylableElement) newElement).copyDefaultStyleDeclarations(((CSSStylableElement) element));
		}
		this.element = newElement;
	}

	@Override
	public boolean elementMustBeRefreshed(IElementProvider elementProvider) {
		if (this.elementProvider == null) {
			return (elementProvider != null);
		}
		return !this.elementProvider.equals(elementProvider);
	}

	@Override
	public void setElementProvider(IElementProvider elementProvider) {
		this.elementProvider = elementProvider;
	}
}