// -*- c-basic-offset: 2 -*-
/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
 *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
 *
 *  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 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include "debugger.h"
#include "nodes.h"
#include <config.h>
#include "ustring.h"

#include "internal.h"

using namespace KJS;

// ------------------------------ Debugger -------------------------------------

namespace KJS {
  struct AttachedInterpreter
  {
    AttachedInterpreter(Interpreter *i, AttachedInterpreter *ai) : interp(i), next(ai) { ++Debugger::debuggersPresent; }
    ~AttachedInterpreter() { --Debugger::debuggersPresent; }
    Interpreter *interp;
    AttachedInterpreter *next;
  };

}

int Debugger::debuggersPresent = 0;

Debugger::Debugger()
{
  lastLineRan = 0;
  rep = new DebuggerImp();
}

Debugger::~Debugger()
{
  detach(0);
  delete rep;
}

void Debugger::attach(Interpreter* interp)
{
  Debugger *other = interp->debugger();
  if (other == this)
    return;
  if (other)
    other->detach(interp);
  interp->setDebugger(this);
  rep->interps = new AttachedInterpreter(interp, rep->interps);
}

void Debugger::detach(Interpreter* interp)
{
  // iterate the addresses where AttachedInterpreter pointers are stored
  // so we can unlink items from the list
  AttachedInterpreter **p = &rep->interps;
  AttachedInterpreter *q;
  while ((q = *p)) {
    if (!interp || q->interp == interp) {
      *p = q->next;
      q->interp->setDebugger(0);
      delete q;
    } else
      p = &q->next;
  }

  if (interp)
    latestExceptions.remove(interp);
  else
    latestExceptions.clear();
}

bool Debugger::hasHandledException(ExecState *exec, JSValue *exception)
{
    if (latestExceptions.get(exec->dynamicInterpreter()).get() == exception)
        return true;

    latestExceptions.set(exec->dynamicInterpreter(), exception);
    return false;
}

bool Debugger::sourceParsed(ExecState * /*exec*/, int /*sourceId*/, const UString &/*sourceURL*/, 
                           const UString &/*source*/, int /*startingLineNumber*/, int /*errorLine*/, const UString & /*errorMsg*/)
{
  return true;
}

bool Debugger::exception(ExecState * /*exec*/, int /*sourceId*/, int /*lineno*/,
                         JSValue * /*exception*/)
{
  return true;
}

bool Debugger::atStatement(ExecState * /*exec*/, int /*sourceId*/, int /*firstLine*/,
                           int /*lastLine*/)
{
  return true;
}

void Debugger::reportAtStatement(ExecState *exec, int sourceId, int firstLine, int lastLine)
{
  lastLineRan = firstLine;
  atStatement(exec, sourceId, firstLine, lastLine);
}

void Debugger::reportException(ExecState *exec, JSValue *exceptionVal)
{
  if (!hasHandledException(exec, exceptionVal))
      exception(exec, exec->currentBody()->sourceId(), lastLineRan, exceptionVal);
}

bool Debugger::enterContext(ExecState * /*exec*/, int /*sourceId*/, int /*lineno*/,
                            JSObject * /*function*/, const List & /*args*/)
{
  return true;
}

bool Debugger::exitContext(ExecState * /*exec*/, int /*sourceId*/, int /*lineno*/,
                           JSObject * /*function*/)
{
  return true;
}

