DoAction.java

/*
 * JSwiff is an open source Java API for Macromedia Flash file generation
 * and manipulation
 *
 * Copyright (C) 2004-2005 Ralf Terdic (contact@jswiff.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.jswiff.swfrecords.tags;

import com.jswiff.io.InputBitStream;
import com.jswiff.io.OutputBitStream;
import com.jswiff.swfrecords.actions.Action;
import com.jswiff.swfrecords.actions.ActionBlock;
import com.jswiff.swfrecords.actions.ActionBlockReader;

import java.io.IOException;

/**
 * This tag instructs Flash Player to execute a series of actions when
 * encountering the next <code>ShowFrame</code> tag, after all drawing for the
 * current frame has completed.
 * 
 * @since SWF 3
 */
public class DoAction extends Tag {
	
	private ActionBlockReader actions;

	/**
	 * Creates a new DoAction instance.
	 */
	public DoAction() {
		code = TagConstants.DO_ACTION;
	}

	/**
	 * Returns the action block containing actions this tag is supposed to
	 * perform. Use <code>addAction()</code> to add action records to this
	 * block.
	 * 
	 * @return contained actions
	 */
	public ActionBlockReader getActions() {
		if (actions == null) {
			actions = ActionBlock.getInstance();
		}
		return actions;
	}

	/**
	 * Adds an action record.
	 * 
	 * @param action
	 *            action record
	 */
	public void addAction(Action action) {
		getActions().addAction(action);
	}

	protected void writeData(OutputBitStream outStream) throws IOException {
		forceLongHeader = true;
		getActions().write(outStream, true);
	}

	void setData(byte[] data) throws IOException {
		InputBitStream inStream = new InputBitStream(data);
		if (getSWFVersion() < 6) {
			if (isJapanese()) {
				inStream.setShiftJIS(true);
			} else {
				inStream.setANSI(true);
			}
		}
		// actions = new ActionBlock(inStream);
		actions = ActionBlock.getInstance();
		actions.read(inStream);
	}

}