// -*- 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 Steet, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include "config.h"
#include "debugger.h"
#include "value.h"
#include "object.h"
#include "types.h"
#include "interpreter.h"
#include "internal.h"
#include "ustring.h"

using namespace KJS;

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

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

}

int Debugger::debuggersPresent = 0;

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

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

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

void Debugger::detach(Interpreter *interp)
{
  if (interp && interp->imp()->debugger() == this)
    interp->imp()->setDebugger(0);

  // 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;
      delete q;
    } else {
      p = &q->next;
    }
  }
}

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

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

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

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

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

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