/*
 * Copyright (C) 2013-2018 Paul Davis <paul@linuxaudiosystems.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#include <iostream>
#include <gtkmm/window.h>

#include "gtkmm2ext/visibility_tracker.h"

using namespace Gtkmm2ext;

bool VisibilityTracker::_use_window_manager_visibility = true;

VisibilityTracker::VisibilityTracker (Gtk::Window& win)
	: _window (win)
#if (defined PLATFORM_WINDOWS || defined __APPLE__)
	, _visibility (GdkVisibilityState (0))
#else
	, _visibility (GDK_VISIBILITY_FULLY_OBSCURED)
#endif
{
	_window.add_events (Gdk::VISIBILITY_NOTIFY_MASK);
	_window.signal_visibility_notify_event().connect (sigc::mem_fun (*this, &VisibilityTracker::handle_visibility_notify_event));
}

void
VisibilityTracker::set_use_window_manager_visibility (bool yn)
{
	_use_window_manager_visibility = yn;
}

bool
VisibilityTracker::handle_visibility_notify_event (GdkEventVisibility* ev)
{
	_visibility = ev->state;
	return false;
}

void
VisibilityTracker::cycle_visibility ()
{
	if (fully_visible ()) {
		_window.hide ();
	} else {
		_window.present ();
	}
}

bool
VisibilityTracker::fully_visible () const
{
	if (_use_window_manager_visibility) {
		return _window.is_mapped() && (_visibility == GDK_VISIBILITY_UNOBSCURED);
	} else {
		return _window.is_mapped();
	}
}

bool
VisibilityTracker::not_visible () const
{
	if (_use_window_manager_visibility) {
		return !_window.is_mapped() || (_visibility == GDK_VISIBILITY_FULLY_OBSCURED);
	} else {
		return !_window.is_mapped();
	}
}

bool
VisibilityTracker::partially_visible () const
{
	if (_use_window_manager_visibility) {
		return _window.is_mapped() && ((_visibility == GDK_VISIBILITY_PARTIAL) || (_visibility == GDK_VISIBILITY_UNOBSCURED));
	} else {
		return _window.is_mapped();
	}
}