// *************************************************************************
//
// Copyleft 2004-2007 Bruno PAGES  .
//
// This file is part of the BOUML Uml Toolkit.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// e-mail : bouml@free.fr
// home   : http://bouml.free.fr
//
// *************************************************************************

#include "Namespace.h"

// namespace stack, namespaces.last() = current namespace full name + "::",
// i.e. A::B...::Z:: in case it is embeded in other one(s)
QStringList Namespace::Stack;

// using list, each element ended by "::"
QStringList Namespace::Usings;

// to lost usings defined under a namespace/class block
QValueList<QStringList> Namespace::UsingScope;

// namespace aliases
QMap<QCString,QCString> Namespace::Aliases;

void Namespace::enter(const QCString & s)
{
  save_using_scope();
  Stack.append((Stack.isEmpty())
	       ? QString(s) + "::"
	       : Stack.last() + QString(s) + "::");
}

void Namespace::exit()
{
  Stack.remove(Stack.last());
  restore_using_scope();
}

void Namespace::restore_using_scope()
{ 
  Usings = UsingScope.first();
  UsingScope.remove(UsingScope.begin());
}

QString Namespace::namespacify(QCString s) {
  int index = s.find("::");
  
  if (index == 0)
    return ((const char *) s) + 2;
  
  if (index != -1) {
    QMap<QCString,QCString>::ConstIterator it = 
      Aliases.find(s.left(index));
    
    if (it != Aliases.end())
      s.replace(0, index, *it);
  }

  return (Stack.isEmpty())
    ? QString(s)
    : Stack.last() + QString(s);
}

QCString Namespace::current() {
  if (Stack.isEmpty())
    return 0;
  
  QString & s = Stack.last();
  
  return QCString(s.left(s.length() - 2));
}