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/*
* SPDX-FileCopyrightText: 2015 Kai Uwe Broulik <kde@privat.broulik.de>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "kwinkscreenhelpereffect.h"
#include <QCoreApplication>
#include <chrono>
#include <private/qtx11extras_p.h>
using namespace std::chrono_literals;
namespace PowerDevil
{
KWinKScreenHelperEffect::KWinKScreenHelperEffect(QObject *parent)
: QObject(parent)
{
m_abortTimer.setSingleShot(true);
m_abortTimer.setInterval(11s);
connect(&m_abortTimer, &QTimer::timeout, this, &KWinKScreenHelperEffect::stop);
qApp->installNativeEventFilter(this);
}
KWinKScreenHelperEffect::~KWinKScreenHelperEffect()
{
stop();
}
bool KWinKScreenHelperEffect::start()
{
m_isValid = checkValid();
if (!m_isValid) {
// emit fade out right away since the effect is not available
Q_EMIT fadedOut();
return false;
}
m_running = true;
setEffectProperty(1);
m_abortTimer.start();
return true;
}
void KWinKScreenHelperEffect::stop()
{
// Maybe somebody got confused, just reset the property then
if (m_state == NormalState) {
setEffectProperty(0);
} else {
setEffectProperty(3);
}
m_running = false;
m_abortTimer.stop();
}
bool KWinKScreenHelperEffect::checkValid()
{
#if HAVE_XCB
if (QX11Info::isPlatformX11()) {
QScopedPointer<xcb_list_properties_reply_t, QScopedPointerPodDeleter> propsReply(
xcb_list_properties_reply(QX11Info::connection(), xcb_list_properties_unchecked(QX11Info::connection(), QX11Info::appRootWindow()), nullptr));
QScopedPointer<xcb_intern_atom_reply_t, QScopedPointerPodDeleter> atomReply(
xcb_intern_atom_reply(QX11Info::connection(), xcb_intern_atom_unchecked(QX11Info::connection(), false, 25, "_KDE_KWIN_KSCREEN_SUPPORT"), nullptr));
if (propsReply.isNull() || atomReply.isNull()) {
return false;
}
auto *atoms = xcb_list_properties_atoms(propsReply.data());
for (int i = 0; i < propsReply->atoms_len; ++i) {
if (atoms[i] == atomReply->atom) {
m_atom = atomReply->atom;
return true;
}
}
m_atom = 0;
return false;
}
#endif
return false;
}
void KWinKScreenHelperEffect::setEffectProperty(long value)
{
#if HAVE_XCB
if (m_isValid && QX11Info::isPlatformX11()) {
xcb_change_property(QX11Info::connection(), XCB_PROP_MODE_REPLACE, QX11Info::appRootWindow(), m_atom, XCB_ATOM_CARDINAL, 32, 1, &value);
}
#else
Q_UNUSED(value);
#endif
}
bool KWinKScreenHelperEffect::nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result)
{
Q_UNUSED(result);
if (eventType != "xcb_generic_event_t") {
return false;
}
#if HAVE_XCB
if (m_isValid && QX11Info::isPlatformX11()) {
auto e = static_cast<xcb_generic_event_t *>(message);
const uint8_t type = e->response_type & ~0x80;
if (type == XCB_PROPERTY_NOTIFY) {
auto *event = reinterpret_cast<xcb_property_notify_event_t *>(e);
if (event->window == QX11Info::appRootWindow()) {
if (event->atom != m_atom) {
return false;
}
auto cookie = xcb_get_property(QX11Info::connection(), false, QX11Info::appRootWindow(), m_atom, XCB_ATOM_CARDINAL, 0, 1);
QScopedPointer<xcb_get_property_reply_t, QScopedPointerPodDeleter> reply(xcb_get_property_reply(QX11Info::connection(), cookie, nullptr));
if (reply.isNull() || reply.data()->value_len != 1 || reply.data()->format != uint8_t(32)) {
return false;
}
auto *data = reinterpret_cast<uint32_t *>(xcb_get_property_value(reply.data()));
if (!data) {
return false;
}
switch (*data) {
case 1:
m_state = FadingOutState;
break;
case 2:
m_state = FadedOutState;
if (m_running) {
Q_EMIT fadedOut();
}
break;
case 3:
m_state = FadingInState;
m_running = false;
m_abortTimer.stop();
break;
default:
m_state = NormalState;
m_running = false;
}
Q_EMIT stateChanged(m_state);
}
}
}
#else
Q_UNUSED(message);
#endif
return false;
}
} // namespace PowerDevil
#include "moc_kwinkscreenhelpereffect.cpp"
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