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/*******************************************************************************
* Copyright (c) 2014 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
*
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.analysis;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.strobel.decompiler.languages.Region;
import com.strobel.decompiler.languages.java.ast.Identifier;
import cuchaz.enigma.mapping.Entry;
public class SourceIndex
{
private String m_source;
private TreeMap<Token,EntryReference<Entry,Entry>> m_tokenToReference;
private Multimap<EntryReference<Entry,Entry>,Token> m_referenceToTokens;
private Map<Entry,Token> m_declarationToToken;
private List<Integer> m_lineOffsets;
public SourceIndex( String source )
{
m_source = source;
m_tokenToReference = Maps.newTreeMap();
m_referenceToTokens = HashMultimap.create();
m_declarationToToken = Maps.newHashMap();
m_lineOffsets = Lists.newArrayList();
// count the lines
m_lineOffsets.add( 0 );
for( int i=0; i<source.length(); i++ )
{
if( source.charAt( i ) == '\n' )
{
m_lineOffsets.add( i + 1 );
}
}
}
public String getSource( )
{
return m_source;
}
public Token getToken( Identifier node )
{
// get a token for this node's region
Region region = node.getRegion();
if( region.getBeginLine() == 0 || region.getEndLine() == 0 )
{
System.err.println( "WARNING: " + node.getNodeType() + " node has invalid region: " + region );
return null;
}
Token token = new Token(
toPos( region.getBeginLine(), region.getBeginColumn() ),
toPos( region.getEndLine(), region.getEndColumn() )
);
// for tokens representing inner classes, make sure we only get the simple name
int pos = node.getName().lastIndexOf( '$' );
if( pos >= 0 )
{
token.end -= pos + 1;
}
// HACKHACK: sometimes node regions are off by one
// I think this is a bug in Procyon, but it's easy to work around
if( !Character.isJavaIdentifierStart( m_source.charAt( token.start ) ) )
{
token.start++;
token.end++;
if( !Character.isJavaIdentifierStart( m_source.charAt( token.start ) ) )
{
throw new IllegalArgumentException( "Region " + region + " does not describe valid token: '" + m_source.substring( token.start, token.end ) + "'" );
}
}
return token;
}
public void addReference( Identifier node, EntryReference<Entry,Entry> deobfReference )
{
Token token = getToken( node );
if( token != null )
{
m_tokenToReference.put( token, deobfReference );
m_referenceToTokens.put( deobfReference, token );
}
}
public void addDeclaration( Identifier node, Entry deobfEntry )
{
Token token = getToken( node );
if( token != null )
{
EntryReference<Entry,Entry> reference = new EntryReference<Entry,Entry>( deobfEntry );
m_tokenToReference.put( token, reference );
m_referenceToTokens.put( reference, token );
m_declarationToToken.put( deobfEntry, token );
}
}
public Token getReferenceToken( int pos )
{
Token token = m_tokenToReference.floorKey( new Token( pos, pos ) );
if( token.contains( pos ) )
{
return token;
}
return null;
}
public Collection<Token> getReferenceTokens( EntryReference<Entry,Entry> deobfReference )
{
return m_referenceToTokens.get( deobfReference );
}
public EntryReference<Entry,Entry> getDeobfReference( Token token )
{
if( token == null )
{
return null;
}
return m_tokenToReference.get( token );
}
public Iterable<Token> referenceTokens( )
{
return m_tokenToReference.keySet();
}
public Iterable<Token> declarationTokens( )
{
return m_declarationToToken.values();
}
public Token getDeclarationToken( Entry deobfEntry )
{
return m_declarationToToken.get( deobfEntry );
}
public int getLineNumber( int pos )
{
// line number is 1-based
int line = 0;
for( Integer offset : m_lineOffsets )
{
if( offset > pos )
{
break;
}
line++;
}
return line;
}
public int getColumnNumber( int pos )
{
// column number is 1-based
return pos - m_lineOffsets.get( getLineNumber( pos ) - 1 ) + 1;
}
private int toPos( int line, int col )
{
// line and col are 1-based
return m_lineOffsets.get( line - 1 ) + col - 1;
}
}
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