////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2019-2022 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave 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 3 of the License, or
// (at your option) any later version.
//
// Octave 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 Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <QApplication>
#include <QSettings>

#include "gui-settings.h"

OCTAVE_BEGIN_NAMESPACE(octave)

QColor gui_settings::get_color_value (const QVariant& def, int mode) const
{
  QColor default_color;

  // Determine whether the default value in pref is given as
  // QPalette::ColorRole or as QColor
  if (def.canConvert (QMetaType::QColor))
    default_color = def.value<QColor> ();
  else
    {
      // The default colors are given as color roles for
      // the application's palette
      default_color = QApplication::palette ().color
        (static_cast<QPalette::ColorRole> (def.toInt ()));
      // FIXME: use value<QPalette::ColorRole> instead of static cast after
      //        dropping support of Qt 5.4
    }

  if ((mode == 1) && (default_color != settings_color_no_change))
    {
      // In second mode, determine the default color from the first mode
      qreal h, s, l, a;
      default_color.getHslF (&h, &s, &l, &a);
      qreal l_new = 1.0-l*0.85;
      if (l < 0.3)
        l_new = 1.0-l*0.7;  // convert darker into lighter colors
      default_color.setHslF (h, s, l_new, a);
    }

  return default_color;
}

QColor gui_settings::color_value (const gui_pref& pref, int mode) const
{
  QColor default_color = get_color_value (pref.def, mode);

  return value (pref.key + settings_color_modes_ext[mode],
                QVariant (default_color)).value<QColor> ();
}

void gui_settings::set_color_value (const gui_pref& pref,
                                    const QColor& color, int mode)
{
  int m = mode;
  if (m > 1)
    m = 1;

  setValue (pref.key + settings_color_modes_ext[m], QVariant (color));
}

QString gui_settings::sc_value (const sc_pref& pref) const
{
  QKeySequence key_seq = sc_def_value (pref);

  // Get the value from the settings where the key sequences are stored
  // as strings
  return value (sc_group + pref.key, key_seq.toString ()).toString ();
}

QKeySequence gui_settings::sc_def_value (const sc_pref& pref) const
{
  QKeySequence key_seq = QKeySequence ();

  // Check, which of the elements for the default value in the sc_pref
  // structure has a valid value and take this as default.  If both
  // elements are not valid, leave the key sequence empty
  if (pref.def)
    key_seq = QKeySequence (pref.def);
  else if (pref.def_std != QKeySequence::UnknownKey)
    key_seq = QKeySequence (pref.def_std);

  return key_seq;
}

OCTAVE_END_NAMESPACE(octave)