// rTorrent - BitTorrent client
// Copyright (C) 2005-2011, Jari Sundell
//
// 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
//
// In addition, as a special exception, the copyright holders give
// permission to link the code of portions of this program with the
// OpenSSL library under certain conditions as described in each
// individual source file, and distribute linked combinations
// including the two.
//
// You must obey the GNU General Public License in all respects for
// all of the code used other than OpenSSL.  If you modify file(s)
// with this exception, you may extend this exception to your version
// of the file(s), but you are not obligated to do so.  If you do not
// wish to do so, delete this exception statement from your version.
// If you delete this exception statement from all source files in the
// program, then also delete it here.
//
// Contact:  Jari Sundell <jaris@ifi.uio.no>
//
//           Skomakerveien 33
//           3185 Skoppum, NORWAY

#ifndef RTORRENT_WINDOW_BASE_H
#define RTORRENT_WINDOW_BASE_H

#include <rak/timer.h>
#include <functional>

#include "canvas.h"
#include "globals.h"

namespace display {

class Canvas;

class Window {
public:
  typedef uint32_t extent_type;

  typedef std::function<void()>                    Slot;
  typedef std::function<void(Window*)>             SlotWindow;
  typedef std::function<void(Window*, rak::timer)> SlotTimer;

  static const int flag_active    = (1 << 0);
  static const int flag_offscreen = (1 << 1);
  static const int flag_focused   = (1 << 2);
  static const int flag_left      = (1 << 3);
  static const int flag_bottom    = (1 << 4);

  static const extent_type extent_static = extent_type();
  static const extent_type extent_full   = ~extent_type();

  Window(Canvas* canvas, int flags,
         extent_type minWidth, extent_type minHeight,
         extent_type maxWidth, extent_type maxHeight);

  virtual ~Window();

  bool                is_active() const                    { return m_flags & flag_active; }
  void                set_active(bool state);

  bool                is_offscreen() const                 { return m_flags & flag_offscreen; }
  void                set_offscreen(bool state)            { if (state) m_flags |= flag_offscreen; else m_flags &= ~flag_offscreen; }

  bool                is_focused() const                   { return m_flags & flag_focused; }
  void                set_focused(bool state)              { if (state) m_flags |= flag_focused; else m_flags &= ~flag_focused; }

  bool                is_left() const                      { return m_flags & flag_left; }
  void                set_left(bool state)                 { if (state) m_flags |= flag_left; else m_flags &= ~flag_left; }

  bool                is_bottom() const                    { return m_flags & flag_bottom; }
  void                set_bottom(bool state)               { if (state) m_flags |= flag_bottom; else m_flags &= ~flag_bottom; }

  bool                is_width_dynamic() const             { return m_maxWidth > m_minWidth; }
  bool                is_height_dynamic() const            { return m_maxHeight > m_minHeight; }

  // Do not call mark_dirty() from withing redraw() as it may cause
  // infinite looping in the display scheduler.
  bool                is_dirty()                           { return m_taskUpdate.is_queued(); }
  void                mark_dirty()                         { if (!is_active()) return; m_slotSchedule(this, cachedTime); }

  extent_type         min_width() const                    { return m_minWidth; }
  extent_type         min_height() const                   { return m_minHeight; }

  extent_type         max_width() const                    { return std::max(m_maxWidth, m_minWidth); }
  extent_type         max_height() const                   { return std::max(m_maxHeight, m_minHeight); }

  extent_type         width() const                        { return m_canvas->width(); }
  extent_type         height() const                       { return m_canvas->height(); }

  void                refresh()                            { m_canvas->refresh(); }
  void                resize(int x, int y, int w, int h);

  virtual void        redraw() = 0;

  rak::priority_item* task_update()                        { return &m_taskUpdate; }

  // Slot for adjust and refresh.
  static void         slot_schedule(SlotTimer s)           { m_slotSchedule = s; }
  static void         slot_unschedule(SlotWindow s)        { m_slotUnschedule = s; }
  static void         slot_adjust(Slot s)                  { m_slotAdjust = s; }

protected:
  Window(const Window&);
  void operator = (const Window&);

  static SlotTimer    m_slotSchedule;
  static SlotWindow   m_slotUnschedule;
  static Slot         m_slotAdjust;

  Canvas*             m_canvas;

  int                 m_flags;

  extent_type         m_minWidth;
  extent_type         m_minHeight;

  extent_type         m_maxWidth;
  extent_type         m_maxHeight;

  rak::priority_item  m_taskUpdate;
};

}

#endif