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#include "screensaver.h"
#include <QX11Info>
#include <QStringList>
#include <QProcess>
#include <QTimer>
#include <X11/Xlib.h>
#ifdef X11_Xscreensaver_FOUND
# include <X11/extensions/scrnsaver.h>
#endif
#ifdef X11_dpms_FOUND
#include <X11/extensions/dpms.h>
#endif
namespace {
Display *display = nullptr;
bool extensionSupported = false;
bool dpmsSupported = false;
QTimer *timer = nullptr;
bool init()
{
if (display != nullptr) {
return true;
}
display = QX11Info::display();
if (display == nullptr) {
return false;
}
#ifdef X11_Xscreensaver_FOUND
int dummy;
extensionSupported = (XScreenSaverQueryExtension(display, &dummy, &dummy) == True);
#endif
#ifdef X11_dpms_FOUND
dpmsSupported = (DPMSCapable(display) == True);
#endif
return true;
}
}
namespace ScreenSaver {
void allowSaverAndStandby(bool allow)
{
if (!init())
return;
#ifdef X11_Xscreensaver_FOUND
if (extensionSupported) {
XScreenSaverSuspend(display, allow ? False : True);
return;
}
#endif
if (allow) {
if (timer != nullptr) {
timer->stop();
}
} else {
if (timer == nullptr) {
timer = new QTimer;
QObject::connect(timer, &QTimer::timeout, forceUnlockAndScreenOn);
}
timer->setSingleShot(false);
timer->start(55000);
}
}
void forceUnlockAndScreenOn()
{
if (!init())
return;
QProcess::startDetached("xscreensaver-command", QStringList() << "-deactivate");
#ifdef X11_dpms_FOUND
CARD16 power_level;
BOOL state;
if (DPMSInfo(display, &power_level, &state) && state) {
DPMSForceLevel(display, DPMSModeOn);
return;
}
#endif
}
}
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