fsshape.java

利用opensource的开源jar实现生成flash文件

/*
 * FSShape.java
 * Transform
 * 
 * Copyright (c) 2001-2006 Flagstone Software Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *  * 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.
 *  * Neither the name of Flagstone Software Ltd. nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.flagstone.transform;

import java.util.*;

/**
FSShape is a container for the shape objects (FSLine, FSCurve and FSShapeStyle objects) 
that describe how a particular shape is drawn.

<table class="datasheet">

<tr><th align="left" colspan="2">Attributes</th></tr>

<tr><td><a name="FSShape_0">objects</a></td>
<td>An array of shape (FSLine, FSCurve and FSShapeStyle) objects which are used to draw the outline of the shape.</td>
</tr>

</table>
</p>

<p>FSShapes are used in shape and font definitions. The FSShape class is used to simplify the design of these classes and provides no added functionality other than acting as a container class.</p>

<h1 class="datasheet">History</h1>

<p>The FSShape class represents the Shape record from the Macromedia Flash (SWF) File Format Specification. It was introduced in Flash 1.</p>
 */
public class FSShape extends FSTransformObject
{
    private ArrayList objects = null;
    private byte[] encodedObjects = null; 

    /*
     * This method is only used when lazily decoding shapes.
     */
    FSShape(FSCoder coder, int length)
    {
        /*
         * This test is used to overcome a bug in SWFTool's pdf2swf where empty 
         * glyphs are only encoded using 1 byte - should be 2.
         */
        if (length > 1)
            encodedObjects = new byte[length];
        
        decode(coder);
    }

    /**
     * Construct an FSShape object, initalizing it with values decoded from an
     * encoded object.
     * 
     * @param coder an FSCoder containing the binary data.
     */
    public FSShape(FSCoder coder)
    {
        decode(coder);
    }
    /** Constructs an FSShape object with no shape objects. */
    public FSShape()
    {
        objects = new ArrayList();
    }
    /** Constructs an FSShape object, specifying the Objects that describe how the shape is drawn.

        @param anArray the array of shape records.
        */
    public FSShape(ArrayList anArray)
    {
        setObjects(anArray);
    }
    /**
     * Constructs an FSShape object by copying values from an existing object.
     *
     * @param obj an FSShape object.
     */
    public FSShape(FSShape obj)
    {
        if (objects != null)
        {
            objects = new ArrayList();
        
            for (Iterator i = obj.objects.iterator(); i.hasNext();)
                objects.add(((FSTransformObject)i.next()).clone());
        }
        else
        {
            encodedObjects = Transform.clone(obj.encodedObjects);
        }
    }

    /** Adds the object to the array of shape records.

        @param anObject an instance of FSShapeStyle, FSLine or FSCurve.
        */
    public void add(FSTransformObject anObject)
    {
        if (encodedObjects != null)
        {
            objects = FSMovie.decodeShape(encodedObjects);
            encodedObjects = null;
        }            
        objects.add(anObject);
     }

    /** Gets the array of shape records that define the shape.

        @return the array of shape records.
        */
    public ArrayList getObjects() 
    {
        if (encodedObjects != null)
        {
            objects = FSMovie.decodeShape(encodedObjects);
            encodedObjects = null;
        }
        return objects;
    }

    /** Sets the array of shape records.

        @param anArray the array of shape records.
        */
    public void setObjects(ArrayList anArray)
    {
        objects = anArray;
    }

    public Object clone()
    {
        FSShape anObject = (FSShape)super.clone();
        
        if (objects != null)
        {
            anObject.objects = new ArrayList();
        
            for (Iterator i = objects.iterator(); i.hasNext();)
                anObject.objects.add(((FSTransformObject)i.next()).clone());
        }
        else
        {
            anObject.encodedObjects = Transform.clone(encodedObjects);
        }

        return anObject;
    }

    /** 
     * Returns true if anObject is equal to this one. Objects are considered 
     * equal if they would generate identical binary data when they are encoded 
     * to a Flash file.
     *
     * @return true if this object would be identical to anObject when encoded.
     */
    public boolean equals(Object anObject)
    {
        boolean result = false;
        
        if (super.equals(anObject))
        {
            FSShape typedObject = (FSShape)anObject;
            
            if (objects != null)
                result = objects.equals(typedObject.objects);
            else
                result = objects == typedObject.objects;
        }
        return result;
    }

    public void appendDescription(StringBuffer buffer, int depth)
    {
        buffer.append(name());

        if (depth > 0)
        {
            buffer.append(": { ");
            Transform.append(buffer, "objects", objects, depth);
            buffer.append("}");
        }
    }

    public int length(FSCoder coder)
    {
        int numberOfBits = 0;
        
        coder.context[FSCoder.NumberOfShapeBits] = numberOfBits;
        
        if (objects != null)
        {
            numberOfBits += 8;
            
            for (Iterator shapeIterator = objects.iterator(); shapeIterator.hasNext();) 
                numberOfBits += ((FSTransformObject)shapeIterator.next()).length(coder);
                
            numberOfBits += 6; // Add size of end of shape
        
            numberOfBits += (numberOfBits % 8 > 0) ? 8-(numberOfBits % 8) : 0;
        }
        else
        {
            numberOfBits += encodedObjects.length << 3;
        }
        return numberOfBits>>3;
    }

    public void encode(FSCoder coder)
    {
        if (objects != null)
        {      
            coder.writeBits(coder.context[FSCoder.NumberOfFillBits], 4);
            coder.writeBits(coder.context[FSCoder.NumberOfLineBits], 4);

            for (Iterator shapeIterator = objects.iterator(); shapeIterator.hasNext();) 
                ((FSTransformObject)shapeIterator.next()).encode(coder);
        
            coder.writeBits(0, 6); // End of shape
            coder.alignToByte();
        }
        else
        {
            coder.writeBytes(encodedObjects);
        }
    }
    
    public void decode(FSCoder coder)
    {
        if (encodedObjects != null)
        {
            coder.readBytes(encodedObjects);            
        }
        else
        {
            objects = FSMovie.decodeShape(coder);
        }
    }
}