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/*
* Copyright 2012-2013 Inalogic® Inc.
*
* This program 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 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE.  See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Brandon Schaefer <brandon.schaefer@canonical.com>
*
*/

#ifndef XICCLIENT_H
#define XICCLIENT_H

/* Xlib.h is the default header that is included and has the core functionallity */
#include <X11/Xlib.h>

namespace nux
{
  class TextEntry;

class XICClient
{
public:
  XICClient();

  void ResetXIC(XIM xim, Window window, Display* display);
  void SetCurrentTextEntry(TextEntry* text_entry_);

  bool HasXIC() const;
  XIC GetXIC() const;

  void Reinitialize();

  void FocusInXIC();
  void FocusOutXIC();
  bool IsFocused() const;

  void DestroyXIC();
private:
  void SetupXIC(XIM xim, Window window, Display* display);
  void SetupXIMStyle(XIM xim);

  XVaNestedList GetPreeditCallbacks();
  XVaNestedList GetStatusCallbacks();
  XIMStyle FilterXIMStyle();

  static int PreeditStartCallback(XIC xic, XPointer clientdata, XPointer data);
  static int PreeditDoneCallback(XIC xic, XPointer clientdata, XPointer data);

  static int PreeditDrawCallback(XIC xic, XPointer clientdata,
                                 XIMPreeditDrawCallbackStruct* call_data);

  TextEntry* text_entry_;
  XIC xic_;
  XIMStyle xim_style_;

  XIMCallback preedit_start_cb_;
  XIMCallback preedit_done_cb_;
  XIMCallback preedit_draw_cb_;
  XIMCallback preedit_caret_cb_;

  XIMCallback status_start_cb_;
  XIMCallback status_done_cb_;
  XIMCallback status_draw_cb_;

  bool focused_;
};

} //namespace nux

#endif // XICClient.h