actionparser.java

java版本的flash文件（swf）播放器

/****************************************************************
 * Copyright (c) 2001, David N. Main, All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the 
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the following 
 * disclaimer. 
 * 
 * 2. Redistributions in binary form must reproduce the above 
 * copyright notice, this list of conditions and the following 
 * disclaimer in the documentation and/or other materials 
 * provided with the distribution.
 * 
 * 3. The name of the author may not be used to endorse or 
 * promote products derived from this software without specific 
 * prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ****************************************************************/
package com.anotherbigidea.flash.readers;

import java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Stack;
import java.util.Vector;

import com.anotherbigidea.flash.SWFActionCodes;
import com.anotherbigidea.flash.SWFConstants;
import com.anotherbigidea.flash.interfaces.SWFActions;
import com.anotherbigidea.io.InStream;

/**
 * Parse action bytes and drive a SWFActions interface
 */
public class ActionParser implements SWFActionCodes 
{
    protected SWFActions actions;
    protected int blockDepth = 0;
    protected String mStringEncoding = SWFConstants.STRING_ENCODING_MX;
    
    public ActionParser( SWFActions actions, int flashVersion )
    {
        this.actions = actions;
        if( flashVersion < SWFConstants.FLASH_MX_VERSION ) {
	        mStringEncoding = SWFConstants.STRING_ENCODING_PRE_MX;
        }
    }
    
    public synchronized void parse( byte[] bytes ) throws IOException
    {
        Vector records = createRecords( bytes );
        processRecords( records );
    }
    
    public synchronized void parse( InStream in ) throws IOException
    {
        Vector records = createRecords( in );
        processRecords( records );
    }
        
    protected void processRecords( Vector records ) throws IOException
    {
        //--process action records
        for( Enumeration enum = records.elements(); enum.hasMoreElements(); )
        {
            ActionRecord rec = (ActionRecord)enum.nextElement();
            
            //actions.comment( "depth=" + rec.blockDepth );
            
            //detect end of block
            if( rec.blockDepth < blockDepth )
            {
                blockDepth--;
                actions.endBlock();
            }
            
            if( rec.label != null ) actions.jumpLabel( rec.label );
            
            int code = rec.code;
            byte[] data = rec.data;
            
            InStream in = (data!=null && data.length > 0) ? new InStream(data) : null;

            switch( code )
            {
                case 0: actions.end(); break;
                
                //--Flash 3
                case GOTO_FRAME    : actions.gotoFrame( in.readUI16() ); break;
                case GET_URL       : actions.getURL( in.readString(mStringEncoding), in.readString(mStringEncoding) ); break;
                case NEXT_FRAME    : actions.nextFrame(); break;
                case PREVIOUS_FRAME: actions.prevFrame(); break;
                case PLAY          : actions.play(); break;
                case STOP          : actions.stop(); break;
                case TOGGLE_QUALITY: actions.toggleQuality(); break;
                case STOP_SOUNDS   : actions.stopSounds(); break;
                case WAIT_FOR_FRAME: actions.waitForFrame( in.readUI16(), rec.jumpLabel ); break;
                case SET_TARGET    : actions.setTarget( in.readString(mStringEncoding) ); break;
                case GOTO_LABEL    : actions.gotoFrame( in.readString(mStringEncoding) ); break;
                
                //--Flash 4
                case IF              : actions.ifJump( rec.jumpLabel ); break;
                case JUMP            : actions.jump( rec.jumpLabel ); break;
                case WAIT_FOR_FRAME_2: actions.waitForFrame( rec.jumpLabel ); break;
                case POP             : actions.pop(); break;
                case PUSH            : parsePush( data.length, in ); break;
                case ADD             : actions.add(); break;
                case SUBTRACT        : actions.substract(); break;
                case MULTIPLY        : actions.multiply(); break;
                case DIVIDE          : actions.divide(); break;
                    
                case EQUALS          : actions.equals(); break;
                case LESS            : actions.lessThan(); break;
                case AND             : actions.and(); break;
                case OR              : actions.or(); break;
                case NOT             : actions.not(); break;
                                       
                case STRING_EQUALS     : actions.stringEquals(); break;
                case STRING_LENGTH     : actions.stringLength(); break;
                case STRING_ADD        : actions.concat(); break;
                case STRING_EXTRACT    : actions.substring(); break;
                case STRING_LESS       : actions.stringLessThan(); break;                                                        
                case MB_STRING_EXTRACT : actions.substringMB(); break;
                case MB_STRING_LENGTH  : actions.stringLengthMB(); break;

                case TO_INTEGER       : actions.toInteger(); break;
                case CHAR_TO_ASCII    : actions.charToAscii(); break;
                case ASCII_TO_CHAR    : actions.asciiToChar(); break;
                case MB_CHAR_TO_ASCII : actions.charMBToAscii(); break;
                case MB_ASCII_TO_CHAR : actions.asciiToCharMB(); break;
    
                case CALL             : actions.call(); break;
                case GET_VARIABLE     : actions.getVariable(); break;
                case SET_VARIABLE     : actions.setVariable(); break;
                 
                case GET_URL_2        : parseGetURL2( in.readUI8() ); break;
                                        
                case GOTO_FRAME_2  : actions.gotoFrame( in.readUI8() != 0 ); break;
                case SET_TARGET_2  : actions.setTarget(); break;
                case GET_PROPERTY  : actions.getProperty(); break;
                case SET_PROPERTY  : actions.setProperty(); break;
                case CLONE_SPRITE  : actions.cloneSprite(); break;
                case REMOVE_SPRITE : actions.removeSprite(); break;
                case START_DRAG    : actions.startDrag(); break;
                case END_DRAG      : actions.endDrag(); break;
                case TRACE         : actions.trace(); break;
                case GET_TIME      : actions.getTime(); break;
                case RANDOM_NUMBER : actions.randomNumber(); break;

                //--Flash 5                         
                case INIT_ARRAY         : actions.initArray(); break;
                case LOOKUP_TABLE       : parseLookupTable( in ); break;
                case CALL_FUNCTION      : actions.callFunction(); break;
                case CALL_METHOD        : actions.callMethod(); break;
                case DEFINE_FUNCTION    : parseDefineFunction(in); break;
                case DEFINE_LOCAL_VAL   : actions.defineLocalValue(); break;
                case DEFINE_LOCAL       : actions.defineLocal(); break;
                case DEL_VAR            : actions.deleteProperty(); break;
                case DEL_THREAD_VARS    : actions.deleteThreadVars(); break;
                case ENUMERATE          : actions.enumerate(); break;
                case TYPED_EQUALS       : actions.typedEquals(); break;
                case GET_MEMBER         : actions.getMember(); break;
                case INIT_OBJECT        : actions.initObject(); break;
                case CALL_NEW_METHOD    : actions.newMethod(); break;
                case NEW_OBJECT         : actions.newObject(); break;
                case SET_MEMBER         : actions.setMember(); break;
                case GET_TARGET_PATH    : actions.getTargetPath(); break;
                case WITH               : parseWith( in ); break;
                case DUPLICATE          : actions.duplicate(); break;
                case RETURN             : actions.returnValue(); break;
                case SWAP               : actions.swap(); break;
                case REGISTER           : actions.storeInRegister( in.readUI8() ); break;
                case MODULO             : actions.modulo(); break;
                case TYPEOF             : actions.typeOf(); break;
                case TYPED_ADD          : actions.typedAdd(); break;
                case TYPED_LESS_THAN    : actions.typedLessThan(); break;
                case CONVERT_TO_NUMBER  : actions.convertToNumber(); break;
                case CONVERT_TO_STRING  : actions.convertToString(); break;
                case INCREMENT          : actions.increment(); break;
                case DECREMENT          : actions.decrement(); break;
                case BIT_AND            : actions.bitAnd(); break;
                case BIT_OR             : actions.bitOr(); break;
                case BIT_XOR            : actions.bitXor(); break;
                case SHIFT_LEFT         : actions.shiftLeft(); break;
                case SHIFT_RIGHT        : actions.shiftRight(); break;
                case SHIFT_UNSIGNED     : actions.shiftRightUnsigned(); break;

				//--Flash 6
				case INSTANCE_OF        : actions.instanceOf(); break;
				case ENUMERATE_OBJECT   : actions.enumerateObject(); break;
				case GREATER            : actions.greaterThan(); break;
				case STRICT_EQUALS      : actions.strictEquals(); break;
				case STRING_GREATER     : actions.stringGreaterThan(); break;

                default: actions.unknown( code, data ); break;
            }            
        }
    }

    protected void parseDefineFunction( InStream in ) throws IOException 
    {
        String name = in.readString(mStringEncoding);
        int paramCount = in.readUI16();
        
        String[] params = new String[ paramCount ];
        for( int i = 0; i < params.length; i++ )
        {
            params[i] = in.readString(mStringEncoding);
        }
        
        int codesize = in.readUI16();