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#define PY_SSIZE_T_CLEAN
#include <Python.h>
#ifdef __linux__
#include <dlfcn.h>
#endif
#ifdef _WIN32
#include <Objbase.h>
#include <Shobjidl.h>
#include <Windows.h>
#endif
static PyObject*
mpl_display_is_valid(PyObject* module)
{
#ifdef __linux__
void* libX11;
// The getenv check is redundant but helps performance as it is much faster
// than dlopen().
if (getenv("DISPLAY")
&& (libX11 = dlopen("libX11.so.6", RTLD_LAZY))) {
struct Display* display = NULL;
struct Display* (* XOpenDisplay)(char const*) =
dlsym(libX11, "XOpenDisplay");
int (* XCloseDisplay)(struct Display*) =
dlsym(libX11, "XCloseDisplay");
if (XOpenDisplay && XCloseDisplay
&& (display = XOpenDisplay(NULL))) {
XCloseDisplay(display);
}
if (dlclose(libX11)) {
PyErr_SetString(PyExc_RuntimeError, dlerror());
return NULL;
}
if (display) {
Py_RETURN_TRUE;
}
}
void* libwayland_client;
if (getenv("WAYLAND_DISPLAY")
&& (libwayland_client = dlopen("libwayland-client.so.0", RTLD_LAZY))) {
struct wl_display* display = NULL;
struct wl_display* (* wl_display_connect)(char const*) =
dlsym(libwayland_client, "wl_display_connect");
void (* wl_display_disconnect)(struct wl_display*) =
dlsym(libwayland_client, "wl_display_disconnect");
if (wl_display_connect && wl_display_disconnect
&& (display = wl_display_connect(NULL))) {
wl_display_disconnect(display);
}
if (dlclose(libwayland_client)) {
PyErr_SetString(PyExc_RuntimeError, dlerror());
return NULL;
}
if (display) {
Py_RETURN_TRUE;
}
}
Py_RETURN_FALSE;
#else
Py_RETURN_TRUE;
#endif
}
static PyObject*
mpl_GetCurrentProcessExplicitAppUserModelID(PyObject* module)
{
#ifdef _WIN32
wchar_t* appid = NULL;
HRESULT hr = GetCurrentProcessExplicitAppUserModelID(&appid);
if (FAILED(hr)) {
return PyErr_SetFromWindowsErr(hr);
}
PyObject* py_appid = PyUnicode_FromWideChar(appid, -1);
CoTaskMemFree(appid);
return py_appid;
#else
Py_RETURN_NONE;
#endif
}
static PyObject*
mpl_SetCurrentProcessExplicitAppUserModelID(PyObject* module, PyObject* arg)
{
#ifdef _WIN32
wchar_t* appid = PyUnicode_AsWideCharString(arg, NULL);
if (!appid) {
return NULL;
}
HRESULT hr = SetCurrentProcessExplicitAppUserModelID(appid);
PyMem_Free(appid);
if (FAILED(hr)) {
return PyErr_SetFromWindowsErr(hr);
}
Py_RETURN_NONE;
#else
Py_RETURN_NONE;
#endif
}
static PyObject*
mpl_GetForegroundWindow(PyObject* module)
{
#ifdef _WIN32
return PyLong_FromVoidPtr(GetForegroundWindow());
#else
Py_RETURN_NONE;
#endif
}
static PyObject*
mpl_SetForegroundWindow(PyObject* module, PyObject *arg)
{
#ifdef _WIN32
HWND handle = PyLong_AsVoidPtr(arg);
if (PyErr_Occurred()) {
return NULL;
}
if (!SetForegroundWindow(handle)) {
return PyErr_Format(PyExc_RuntimeError, "Error setting window");
}
Py_RETURN_NONE;
#else
Py_RETURN_NONE;
#endif
}
static PyObject*
mpl_SetProcessDpiAwareness_max(PyObject* module)
{
#ifdef _WIN32
#ifdef _DPI_AWARENESS_CONTEXTS_
// These functions and options were added in later Windows 10 updates, so
// must be loaded dynamically.
typedef BOOL (WINAPI *IsValidDpiAwarenessContext_t)(DPI_AWARENESS_CONTEXT);
typedef BOOL (WINAPI *SetProcessDpiAwarenessContext_t)(DPI_AWARENESS_CONTEXT);
HMODULE user32 = LoadLibrary("user32.dll");
IsValidDpiAwarenessContext_t IsValidDpiAwarenessContextPtr =
(IsValidDpiAwarenessContext_t)GetProcAddress(
user32, "IsValidDpiAwarenessContext");
SetProcessDpiAwarenessContext_t SetProcessDpiAwarenessContextPtr =
(SetProcessDpiAwarenessContext_t)GetProcAddress(
user32, "SetProcessDpiAwarenessContext");
DPI_AWARENESS_CONTEXT ctxs[3] = {
DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2, // Win10 Creators Update
DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE, // Win10
DPI_AWARENESS_CONTEXT_SYSTEM_AWARE}; // Win10
if (IsValidDpiAwarenessContextPtr != NULL
&& SetProcessDpiAwarenessContextPtr != NULL) {
for (int i = 0; i < sizeof(ctxs) / sizeof(DPI_AWARENESS_CONTEXT); ++i) {
if (IsValidDpiAwarenessContextPtr(ctxs[i])) {
SetProcessDpiAwarenessContextPtr(ctxs[i]);
break;
}
}
} else {
// Added in Windows Vista.
SetProcessDPIAware();
}
FreeLibrary(user32);
#else
// Added in Windows Vista.
SetProcessDPIAware();
#endif
#endif
Py_RETURN_NONE;
}
static PyMethodDef functions[] = {
{"display_is_valid", (PyCFunction)mpl_display_is_valid, METH_NOARGS,
"display_is_valid()\n--\n\n"
"Check whether the current X11 or Wayland display is valid.\n\n"
"On Linux, returns True if either $DISPLAY is set and XOpenDisplay(NULL)\n"
"succeeds, or $WAYLAND_DISPLAY is set and wl_display_connect(NULL)\n"
"succeeds.\n\n"
"On other platforms, always returns True."},
{"Win32_GetCurrentProcessExplicitAppUserModelID",
(PyCFunction)mpl_GetCurrentProcessExplicitAppUserModelID, METH_NOARGS,
"Win32_GetCurrentProcessExplicitAppUserModelID()\n--\n\n"
"Wrapper for Windows's GetCurrentProcessExplicitAppUserModelID.\n\n"
"On non-Windows platforms, always returns None."},
{"Win32_SetCurrentProcessExplicitAppUserModelID",
(PyCFunction)mpl_SetCurrentProcessExplicitAppUserModelID, METH_O,
"Win32_SetCurrentProcessExplicitAppUserModelID(appid, /)\n--\n\n"
"Wrapper for Windows's SetCurrentProcessExplicitAppUserModelID.\n\n"
"On non-Windows platforms, does nothing."},
{"Win32_GetForegroundWindow",
(PyCFunction)mpl_GetForegroundWindow, METH_NOARGS,
"Win32_GetForegroundWindow()\n--\n\n"
"Wrapper for Windows' GetForegroundWindow.\n\n"
"On non-Windows platforms, always returns None."},
{"Win32_SetForegroundWindow",
(PyCFunction)mpl_SetForegroundWindow, METH_O,
"Win32_SetForegroundWindow(hwnd, /)\n--\n\n"
"Wrapper for Windows' SetForegroundWindow.\n\n"
"On non-Windows platforms, does nothing."},
{"Win32_SetProcessDpiAwareness_max",
(PyCFunction)mpl_SetProcessDpiAwareness_max, METH_NOARGS,
"Win32_SetProcessDpiAwareness_max()\n--\n\n"
"Set Windows' process DPI awareness to best option available.\n\n"
"On non-Windows platforms, does nothing."},
{NULL, NULL}}; // sentinel.
static PyModuleDef util_module = {
PyModuleDef_HEAD_INIT, "_c_internal_utils", NULL, 0, functions
};
#pragma GCC visibility push(default)
PyMODINIT_FUNC PyInit__c_internal_utils(void)
{
return PyModule_Create(&util_module);
}
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