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The Apache Royale Compiler SWF Utility classes
/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package flash.swf;
import flash.swf.tags.DefineTag;
import flash.swf.tags.DefineFont;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
/**
* Represents the collection of definitions in a SWF.
*/
public class Dictionary
{
private static DefineTag INVALID_TAG = new DefineTag(Tag.stagEnd) { public void visit(TagHandler t) {} };
Map ids = new HashMap();
Map tags = new HashMap();
Map names = new HashMap();
Map fonts = new HashMap();
private int nextId = 1;
public boolean contains(int id)
{
return ids.containsKey(new Integer(id));
}
public boolean contains(DefineTag tag)
{
return tags.containsKey(tag);
}
public int getId(DefineTag tag)
{
if (tag == null || tag == INVALID_TAG)
{
return -1;//throw new NullPointerException("no ids for null tags");
}
else
{
// when we're encoding, we should definitely find the tag here.
Object idobj = tags.get(tag);
if (idobj == null)
{
// When we're decoding, we don't fill in the tags map, and so we'll have
// to search for the tag to see what it had when we read it in.
Iterator iterator = ids.entrySet().iterator();
while (iterator.hasNext())
{
Entry entry = (Entry) iterator.next();
// [ets 1/14/04] we use an exact comparison here instead of equals() because this point
// should only be reached during *decoding*, by tools that want to report the id
// that is only stored in the ids map. Since each DefineTag from a single swf will
// be a unique object, this should be safe. During encoding, we will find ID's stored
// in the tags map, and the ids map should be empty. if we use equals(), it is possible
// for tools to report the wrong ID, because the defineTags may not be fully decoded yet,
// for example the ExportAssets may not have been reached, so the tag might not have its
// name yet, and therefore compare equal to another unique but yet-unnamed tag.
if (entry.getValue() == tag)
{
idobj = entry.getKey();
break;
}
}
}
if (idobj == null)
{
assert false : ("encoding error, " + tag.name + " not in dictionary");
}
return ((Integer) idobj).intValue();
}
}
/**
* This is the method used during encoding.
*/
public int add(DefineTag tag)
{
assert (tag != null);
Integer obj = tags.get(tag);
if (obj!=null)
{
//throw new IllegalArgumentException("symbol " +tag+ " redefined");
return obj.intValue();
}
else
{
Integer key = new Integer(nextId++);
tags.put(tag, key);
ids.put(key, tag);
return key.intValue();
}
}
/**
* This is method used during decoding.
*
* @param id
* @param s
* @throws IllegalArgumentException if the dictionary already has that id
*/
public void add(int id, DefineTag s)
throws IllegalArgumentException
{
Integer key = new Integer(id);
Tag t = ids.get(key);
if (t == null)
{
ids.put(key, s);
// This DefineTag is potentially very generic, for example
// it's name is most likely null, so don't bother adding
// it to the tags Map.
}
else
{
if (t.equals(s))
throw new IllegalArgumentException("symbol " + id + " redefined by identical tag");
else
throw new IllegalArgumentException("symbol " + id + " redefined by different tag");
}
}
public void addName(DefineTag s, String name)
{
names.put(name, s);
}
private static String makeFontKey( String name, boolean bold, boolean italic )
{
return name + (bold? "_bold_" : "_normal_") + (italic? "_italic" : "_regular");
}
public void addFontFace(DefineFont defineFont)
{
fonts.put( makeFontKey(defineFont.getFontName(), defineFont.isBold(), defineFont.isItalic() ), defineFont );
}
public DefineFont getFontFace(String name, boolean bold, boolean italic)
{
return fonts.get( makeFontKey( name, bold, italic ) );
}
public boolean contains(String name)
{
return names.containsKey(name);
}
public DefineTag getTag(String name)
{
return names.get(name);
}
/**
* @throws IllegalArgumentException if the id is not defined
* @param idref
* @return
*/
public DefineTag getTag(int idref)
throws IllegalArgumentException
{
Integer key = new Integer(idref);
DefineTag t = ids.get(key);
if (t == null)
{
// [tpr 7/6/04] work around authoring tool bug of bogus 65535 ids
if(idref != 65535)
throw new IllegalArgumentException("symbol " + idref + " not defined");
else
return INVALID_TAG;
}
return t;
}
// method added to support Flash Authoring - jkamerer 2007.07.30
public void setNextId(int nextId)
{
this.nextId = nextId;
}
// method added to support Flash Authoring - jkamerer 2007.07.30
public int getNextId()
{
return nextId;
}
}