moonlight-qt/app/wm.cpp
2021-03-13 15:20:58 -06:00

98 lines
2.5 KiB
C++

#include <QtGlobal>
#include "utils.h"
#include <SDL.h>
#ifdef HAS_X11
#include <X11/Xlib.h>
#endif
#ifdef HAS_WAYLAND
#include <wayland-client.h>
#endif
#define VALUE_SET 0x01
#define VALUE_TRUE 0x02
bool WMUtils::isRunningX11()
{
#ifdef HAS_X11
static SDL_atomic_t isRunningOnX11;
// If the value is not set yet, populate it now.
int val = SDL_AtomicGet(&isRunningOnX11);
if (!(val & VALUE_SET)) {
Display* display = XOpenDisplay(nullptr);
if (display != nullptr) {
XCloseDisplay(display);
}
// Populate the value to return and have for next time.
// This can race with another thread populating the same data,
// but that's no big deal.
val = VALUE_SET | ((display != nullptr) ? VALUE_TRUE : 0);
SDL_AtomicSet(&isRunningOnX11, val);
}
return !!(val & VALUE_TRUE);
#endif
return false;
}
bool WMUtils::isRunningWayland()
{
#ifdef HAS_WAYLAND
static SDL_atomic_t isRunningOnWayland;
// If the value is not set yet, populate it now.
int val = SDL_AtomicGet(&isRunningOnWayland);
if (!(val & VALUE_SET)) {
struct wl_display* display = wl_display_connect(nullptr);
if (display != nullptr) {
wl_display_disconnect(display);
}
// Populate the value to return and have for next time.
// This can race with another thread populating the same data,
// but that's no big deal.
val = VALUE_SET | ((display != nullptr) ? VALUE_TRUE : 0);
SDL_AtomicSet(&isRunningOnWayland, val);
}
return !!(val & VALUE_TRUE);
#endif
return false;
}
bool WMUtils::isRunningWindowManager()
{
#if defined(Q_OS_WIN) || defined(Q_OS_DARWIN)
// Windows and macOS are always running a window manager
return true;
#else
// On Unix OSes, look for Wayland or X
return WMUtils::isRunningWayland() || WMUtils::isRunningX11();
#endif
}
bool WMUtils::isRunningDesktopEnvironment()
{
if (qEnvironmentVariableIsSet("HAS_DESKTOP_ENVIRONMENT")) {
return qEnvironmentVariableIntValue("HAS_DESKTOP_ENVIRONMENT");
}
#if defined(Q_OS_WIN) || defined(Q_OS_DARWIN)
// Windows and macOS are always running a desktop environment
return true;
#elif defined(EMBEDDED_BUILD)
// Embedded systems don't run desktop environments
return false;
#else
// On non-embedded systems, assume we have a desktop environment
// if we have a WM running.
return isRunningWindowManager();
#endif
}