/* Soot - a J*va Optimization Framework
* Copyright (C) 2003 Ondrej Lhotak
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
package soot;
import java.util.*;
import soot.tagkit.*;
/**
* Adds PositionTags to ValueBoxes to identify their position in the output.
*/
public class AttributesUnitPrinter {
private Stack<Integer> startOffsets;
private int endOffset;
private int startStmtOffset;
private int startLn;
private int currentLn;
private int lastNewline;
private UnitPrinter printer;
public AttributesUnitPrinter( int currentLnNum ) {
this.currentLn = currentLnNum;
}
public void startUnit( Unit u ) {
startLn = currentLn;
startStmtOffset = output().length() - lastNewline;
}
public void endUnit( Unit u ) {
int endStmtOffset = output().length() - lastNewline;
//G.v().out.println("u: "+u.toString());
if (hasTag(u)){
//G.v().out.println("u: "+u.toString()+" has tag");
u.addTag( new JimpleLineNumberTag( startLn, currentLn ));
}
if (hasColorTag(u)) {
u.addTag( new PositionTag(startStmtOffset, endStmtOffset) );
}
}
public void startValueBox( ValueBox u ) {
if (startOffsets == null) {
startOffsets = new Stack<Integer>();
}
startOffsets.push(new Integer(output().length() - lastNewline));
}
public void endValueBox( ValueBox u ) {
endOffset = output().length() - lastNewline;
if (hasColorTag(u)) {
u.addTag(new PositionTag(startOffsets.pop().intValue(), endOffset));
}
}
private boolean hasTag(Host h) {
if (h instanceof Unit) {
Iterator usesAndDefsIt = ((Unit)h).getUseAndDefBoxes().iterator();
while (usesAndDefsIt.hasNext()){
if (hasTag((ValueBox)usesAndDefsIt.next())) return true;
}
}
if (h.getTags().isEmpty()) return false;
return true;
}
private boolean hasColorTag(Host h) {
Iterator it = h.getTags().iterator();
while (it.hasNext()){
if (it.next() instanceof ColorTag) return true;
}
return false;
}
public void setEndLn(int ln){
currentLn = ln;
}
public int getEndLn() {
return currentLn;
}
public void newline() {
currentLn++;
lastNewline = output().length();
}
private StringBuffer output() {
return printer.output();
}
public void setUnitPrinter( UnitPrinter up ) {
printer = up;
}
}