/*
 * @(#)TextHolderContentProducer.java
 *
 * Project:		JHotdraw - a GUI framework for technical drawings
 *				http://www.jhotdraw.org
 *				http://jhotdraw.sourceforge.net
 * Copyright:	© by the original author(s) and all contributors
 * License:		Lesser GNU Public License (LGPL)
 *				http://www.opensource.org/licenses/lgpl-license.html
 */
package CH.ifa.draw.contrib.html;

import java.io.IOException;

import java.io.Serializable;
import CH.ifa.draw.util.StorableInput;
import CH.ifa.draw.util.StorableOutput;
import CH.ifa.draw.standard.TextHolder;

/**
 * TextAreaFigureContentProducer produces text contents from an existing
 * TextHolder figure<br>
 * It can either be specific if set for a specific figure, or generic, encoding
 * any color passed to the getContents method.<br>
 * The main usage of this producer is to embed a "master" or "shared" drawing
 * figure into other figures so that updating the master figure automatically
 * changes all dependent figures as well. Kind of a hot text snippet if you like<br>
 *
 * @author  Eduardo Francos - InContext
 * @created 30 avril 2002
 * @version <$CURRENT_VERSION$>
 */
public class TextHolderContentProducer extends AbstractContentProducer
		 implements Serializable {

	private TextHolder myTextHolder;

	/**
	 * Constructor for the TextAreaFigureContentProducer object
	 */
	public TextHolderContentProducer() { }

	/**
	 *Constructor for the TextAreaFigureContentProducer object
	 *
	 * @param figure  Description of the Parameter
	 */
	public TextHolderContentProducer(TextHolder figure) {
		setTextHolder(figure);
	}

	/**
	 * Gets the text from the text figure
	 *
	 * @param context       Description of the Parameter
	 * @param ctxAttrName   Description of the Parameter
	 * @param ctxAttrValue  Description of the Parameter
	 * @return              The content value
	 */
	public Object getContent(ContentProducerContext context, String ctxAttrName, Object ctxAttrValue) {
		// if we have our own figure then use it
		// otherwise use the one supplied
		TextHolder figure = (getTextHolder() != null) ? getTextHolder() : (TextHolder)ctxAttrValue;
		// return the areas text
		return figure.getText();
	}

	/**
	 * Writes the storable
	 *
	 * @param dw  the storable output
	 */
	public void write(StorableOutput dw) {
		super.write(dw);
		dw.writeStorable(getTextHolder().getRepresentingFigure());
	}

	/**
	 * Writes the storable
	 *
	 * @param dr               the storable input
	 * @exception IOException  thrown by called methods
	 */
	public void read(StorableInput dr) throws IOException {
		super.read(dr);
		setTextHolder((TextHolder)dr.readStorable());
	}

	protected TextHolder getTextHolder() {
		return myTextHolder;
	}

	public void setTextHolder(TextHolder newFigure) {
		myTextHolder = newFigure;
	}
}