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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.AstNode;
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;
private boolean m_ignoreBadTokens;
public SourceIndex(String source) {
this(source, true);
}
public SourceIndex(String source, boolean ignoreBadTokens) {
m_source = source;
m_ignoreBadTokens = ignoreBadTokens;
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(AstNode node) {
// get the text of the node
String name = "";
if (node instanceof Identifier) {
name = ((Identifier)node).getName();
}
// get a token for this node's region
Region region = node.getRegion();
if (region.getBeginLine() == 0 || region.getEndLine() == 0) {
// DEBUG
System.err.println(String.format("WARNING: %s \"%s\" has invalid region: %s", node.getNodeType(), name, region));
return null;
}
Token token = new Token(
toPos(region.getBeginLine(), region.getBeginColumn()),
toPos(region.getEndLine(), region.getEndColumn()),
m_source
);
if (token.start == 0) {
// DEBUG
System.err.println(String.format("WARNING: %s \"%s\" has invalid start: %s", node.getNodeType(), name, region));
return null;
}
// DEBUG
// System.out.println( String.format( "%s \"%s\" region: %s", node.getNodeType(), name, region ) );
// if the token has a $ in it, something's wrong. Ignore this token
if (name.lastIndexOf('$') >= 0 && m_ignoreBadTokens) {
// DEBUG
System.err.println(String.format("WARNING: %s \"%s\" is probably a bad token. It was ignored", node.getNodeType(), name));
return null;
}
return token;
}
public void addReference(AstNode node, Entry deobfEntry, Entry deobfContext) {
Token token = getToken(node);
if (token != null) {
EntryReference<Entry,Entry> deobfReference = new EntryReference<Entry,Entry>(deobfEntry, token.text, deobfContext);
m_tokenToReference.put(token, deobfReference);
m_referenceToTokens.put(deobfReference, token);
}
}
public void addDeclaration(AstNode node, Entry deobfEntry) {
Token token = getToken(node);
if (token != null) {
EntryReference<Entry,Entry> reference = new EntryReference<Entry,Entry>(deobfEntry, token.text);
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, null));
if (token != null && 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 void replaceDeobfReference(Token token, EntryReference<Entry,Entry> newDeobfReference) {
EntryReference<Entry,Entry> oldDeobfReference = m_tokenToReference.get(token);
m_tokenToReference.put(token, newDeobfReference);
Collection<Token> tokens = m_referenceToTokens.get(oldDeobfReference);
m_referenceToTokens.removeAll(oldDeobfReference);
m_referenceToTokens.putAll(newDeobfReference, tokens);
}
public Iterable<Token> referenceTokens() {
return m_tokenToReference.keySet();
}
public Iterable<Token> declarationTokens() {
return m_declarationToToken.values();
}
public Iterable<Entry> declarations() {
return m_declarationToToken.keySet();
}
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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