// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
 * Color selected in color selector widget.
 * This file was created during the refactoring of SPColorSelector
 *//*
 * Authors:
 *	 bulia byak <buliabyak@users.sf.net>
 *   Jon A. Cruz <jon@joncruz.org>
 *   Tomasz Boczkowski <penginsbacon@gmail.com>
 *
 * Copyright (C) 2014 Authors
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */

#include <glibmm/ustring.h>
#include <cmath>

#include "svg/svg-icc-color.h"
#include "ui/selected-color.h"

namespace Inkscape {
namespace UI {

double const SelectedColor::_EPSILON = 1e-4;

SelectedColor::SelectedColor()
	: _color(0)
    , _alpha(1.0)
    , _held(false)
    , _virgin(true)
    , _updating(false)
{

}

SelectedColor::~SelectedColor() = default;

void SelectedColor::setColor(SPColor const &color)
{
    setColorAlpha( color, _alpha);
}

SPColor SelectedColor::color() const
{
    return _color;
}

void SelectedColor::setAlpha(gfloat alpha)
{
    g_return_if_fail( ( 0.0 <= alpha ) && ( alpha <= 1.0 ) );
    setColorAlpha( _color, alpha);
}

gfloat SelectedColor::alpha() const
{
    return _alpha;
}

void SelectedColor::setValue(guint32 value)
{
    SPColor color(value);
    gfloat alpha = SP_RGBA32_A_F(value);
    setColorAlpha(color, alpha);
}

guint32 SelectedColor::value() const
{
    return color().toRGBA32(_alpha);
}

void SelectedColor::setColorAlpha(SPColor const &color, gfloat alpha, bool emit_signal)
{
#ifdef DUMP_CHANGE_INFO
    g_message("SelectedColor::setColorAlpha( this=%p, %f, %f, %f, %s,   %f,   %s)", this, color.v.c[0], color.v.c[1], color.v.c[2], (color.icc?color.icc->colorProfile.c_str():"<null>"), alpha, (emit_signal?"YES":"no"));
#endif
    g_return_if_fail( ( 0.0 <= alpha ) && ( alpha <= 1.0 ) );

    if (_updating) {
        return;
    }

#ifdef DUMP_CHANGE_INFO
    g_message("---- SelectedColor::setColorAlpha    virgin:%s   !close:%s    alpha is:%s",
              (_virgin?"YES":"no"),
              (!color.isClose( _color, _EPSILON )?"YES":"no"),
              ((fabs((_alpha) - (alpha)) >= _EPSILON )?"YES":"no")
              );
#endif

    if ( _virgin || !color.isClose( _color, _EPSILON ) ||
         (fabs((_alpha) - (alpha)) >= _EPSILON )) {

        _virgin = false;

        _color = color;
        _alpha = alpha;

        if (emit_signal)
        {
            _updating = true;
            if (_held) {
                signal_dragged.emit();
            } else {
                signal_changed.emit();
            }
            _updating = false;
        }

#ifdef DUMP_CHANGE_INFO
    } else {
        g_message("++++ SelectedColor::setColorAlpha   color:%08x  ==>  _color:%08X   isClose:%s", color.toRGBA32(alpha), _color.toRGBA32(_alpha),
                  (color.isClose( _color, _EPSILON )?"YES":"no"));
#endif
    }
}

void SelectedColor::colorAlpha(SPColor &color, gfloat &alpha) const {
	color = _color;
	alpha = _alpha;
}

void SelectedColor::setHeld(bool held) {
    if (_updating) {
        return;
    }
    bool grabbed = held && !_held;
    bool released = !held && _held;

    _held = held;

    _updating = true;
    if (grabbed) {
        signal_grabbed.emit();
    }

    if (released) {
        signal_released.emit();
        // signal_changed.emit();  // TODO: signal_changed isn't emitted after dragging!
    }
    _updating = false;
}

void SelectedColor::preserveICC() {
    _color.icc = _color.icc ? new SVGICCColor(*_color.icc) : nullptr;
}

}
}

/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :