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Resolve libXss.so symbols at runtime

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This enables running the advanced scene switcher in environments in
which this library is not available with only minimal loss of
functionality (idle detection)
This commit is contained in:
WarmUpTill 2022-11-27 12:25:15 +01:00 committed by WarmUpTill
parent 20ba02be8d
commit cc3ce3f0e0
1 changed files with 25 additions and 5 deletions
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30
src/linux/advanced-scene-switcher-nix.cpp
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@ -39,6 +39,13 @@ typedef int (*keyPressFunc)(Display *, unsigned int, bool, unsigned long);
static keyPressFunc pressFunc = nullptr;
bool canSimulateKeyPresses = false;
static QLibrary *libXssHandle = nullptr;
typedef XScreenSaverInfo *(*XScreenSaverAllocInfoFunc)();
typedef int (*XScreenSaverQueryInfoFunc)(Display *, Window, XScreenSaverInfo *);
static XScreenSaverAllocInfoFunc allocSSFunc = nullptr;
static XScreenSaverQueryInfoFunc querySSFunc = nullptr;
bool canGetIdleTime = false;
Display *disp()
{
if (!xdisplay) {
@ -459,18 +466,22 @@ bool isInFocus(const QString &executable)
int secondsSinceLastInput()
{
if (!canGetIdleTime) {
return 0;
}
time_t idle_time;
static XScreenSaverInfo *mit_info;
Display *display;
int screen;
mit_info = XScreenSaverAllocInfo();
mit_info = allocSSFunc();
if ((display = disp()) == NULL) {
return -1;
}
screen = DefaultScreen(display);
XScreenSaverQueryInfo(display, RootWindow(display, screen), mit_info);
querySSFunc(display, RootWindow(display, screen), mit_info);
idle_time = (mit_info->idle) / 1000;
XFree(mit_info);
@ -636,17 +647,26 @@ void PressKeys(const std::vector<HotkeyType> keys, int duration)
void PlatformInit()
{
libXtstHandle = new QLibrary("libXtst.so", nullptr);
libXtstHandle = new QLibrary("libXtst", nullptr);
pressFunc = (keyPressFunc)libXtstHandle->resolve("XTestFakeKeyEvent");
int _;
canSimulateKeyPresses = pressFunc &&
!XQueryExtension(disp(), "XTEST", &_, &_, &_);
XQueryExtension(disp(), "XTEST", &_, &_, &_);
libXssHandle = new QLibrary("libXss", nullptr);
allocSSFunc = (XScreenSaverAllocInfoFunc)libXssHandle->resolve(
"XScreenSaverAllocInfo");
querySSFunc = (XScreenSaverQueryInfoFunc)libXssHandle->resolve(
"XScreenSaverQueryInfo");
canGetIdleTime = allocSSFunc && querySSFunc &&
XQueryExtension(disp(), ScreenSaverName, &_, &_, &_);
}
void PlatformCleanup()
{
delete libXtstHandle;
libXtstHandle = nullptr;
delete libXssHandle;
libXssHandle = nullptr;
cleanupDisplay();
}