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#
include
<
Python.h
>
/*
Python.h must be included before any system headers,
to ensure visibility macros are properly set.
*/
#
include
<
stdexcept
>
#
ifdef
_WIN32
#
define
WIN32_LEAN_AND_MEAN
//
Windows 10, for latest HiDPI API support.
#
define
WINVER
0x0A00
#
define
_WIN32_WINNT
0x0A00
#
endif
#
include
<
pybind11/pybind11.h
>
#
ifdef
__linux__
#
include
<
dlfcn.h
>
#
endif
#
ifdef
_WIN32
#
include
<
Objbase.h
>
#
include
<
Shobjidl.h
>
#
include
<
Windows.h
>
#
define
UNUSED_ON_NON_WINDOWS
(
x
) x
#
else
#
define
UNUSED_ON_NON_WINDOWS
Py_UNUSED
#
endif
namespace
py
=
pybind11;
using
namespace
pybind11
::literals
;
static
bool
mpl_display_is_valid
(
void
)
{
#
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
))) {
typedef
struct
Display
* (*XOpenDisplay_t)(
char
const
*);
typedef
int
(*XCloseDisplay_t)(
struct
Display
*);
struct
Display
* display =
NULL
;
XOpenDisplay_t XOpenDisplay = (XOpenDisplay_t)
dlsym
(libX11,
"
XOpenDisplay
"
);
XCloseDisplay_t XCloseDisplay = (XCloseDisplay_t)
dlsym
(libX11,
"
XCloseDisplay
"
);
if
(XOpenDisplay && XCloseDisplay
&& (display =
XOpenDisplay
(
NULL
))) {
XCloseDisplay
(display);
}
if
(
dlclose
(libX11)) {
throw
std::runtime_error
(
dlerror
());
}
if
(display) {
return
true
;
}
}
void
* libwayland_client;
if
(
getenv
(
"
WAYLAND_DISPLAY
"
)
&& (libwayland_client =
dlopen
(
"
libwayland-client.so.0
"
,
RTLD_LAZY
))) {
typedef
struct
wl_display
* (*
wl_display_connect_t
)(
char
const
*);
typedef
void
(*
wl_display_disconnect_t
)(
struct
wl_display
*);
struct
wl_display
* display =
NULL
;
wl_display_connect_t
wl_display_connect =
(
wl_display_connect_t
)
dlsym
(libwayland_client,
"
wl_display_connect
"
);
wl_display_disconnect_t
wl_display_disconnect =
(
wl_display_disconnect_t
)
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)) {
throw
std::runtime_error
(
dlerror
());
}
if
(display) {
return
true
;
}
}
return
false
;
#
else
return
true
;
#
endif
}
static
py::object
mpl_GetCurrentProcessExplicitAppUserModelID
(
void
)
{
#
ifdef
_WIN32
wchar_t
* appid =
NULL
;
HRESULT
hr =
GetCurrentProcessExplicitAppUserModelID
(&appid);
if
(
FAILED
(hr)) {
PyErr_SetFromWindowsErr
(hr);
throw
py::error_already_set
();
}
auto
py_appid =
py::cast
(appid);
CoTaskMemFree
(appid);
return
py_appid;
#
else
return
py::none
();
#
endif
}
static
void
mpl_SetCurrentProcessExplicitAppUserModelID
(
const
wchar_t
*
UNUSED_ON_NON_WINDOWS
(appid))
{
#
ifdef
_WIN32
HRESULT
hr =
SetCurrentProcessExplicitAppUserModelID
(appid);
if
(
FAILED
(hr)) {
PyErr_SetFromWindowsErr
(hr);
throw
py::error_already_set
();
}
#
endif
}
static
py::object
mpl_GetForegroundWindow
(
void
)
{
#
ifdef
_WIN32
if
(
HWND
hwnd =
GetForegroundWindow
()) {
return
py::capsule
(hwnd,
"
HWND
"
);
}
else
{
return
py::none
();
}
#
else
return
py::none
();
#
endif
}
static
void
mpl_SetForegroundWindow
(py::capsule
UNUSED_ON_NON_WINDOWS
(handle_p))
{
#
ifdef
_WIN32
if
(handle_p.
name
() !=
"
HWND
"
) {
throw
std::runtime_error
(
"
Handle must be a value returned from Win32_GetForegroundWindow
"
);
}
HWND
handle =
static_cast
<
HWND
>(handle_p.
get_pointer
());
if
(!
SetForegroundWindow
(handle)) {
throw
std::runtime_error
(
"
Error setting window
"
);
}
#
endif
}
static
void
mpl_SetProcessDpiAwareness_max
(
void
)
{
#
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
}
PYBIND11_MODULE
(_c_internal_utils, m)
{
m.
def
(
"
display_is_valid
"
, &mpl_display_is_valid,
R"""(
--
Check whether the current X11 or Wayland display is valid.
On Linux, returns True if either $DISPLAY is set and XOpenDisplay(NULL)
succeeds, or $WAYLAND_DISPLAY is set and wl_display_connect(NULL)
succeeds.
On other platforms, always returns True.
)"""
);
m.
def
(
"
Win32_GetCurrentProcessExplicitAppUserModelID
"
,
&mpl_GetCurrentProcessExplicitAppUserModelID,
R"""(
--
Wrapper for Windows's GetCurrentProcessExplicitAppUserModelID.
On non-Windows platforms, always returns None.
)"""
);
m.
def
(
"
Win32_SetCurrentProcessExplicitAppUserModelID
"
,
&mpl_SetCurrentProcessExplicitAppUserModelID,
"
appid
"
_a,
py::pos_only
(),
R"""(
--
Wrapper for Windows's SetCurrentProcessExplicitAppUserModelID.
On non-Windows platforms, does nothing.
)"""
);
m.
def
(
"
Win32_GetForegroundWindow
"
, &mpl_GetForegroundWindow,
R"""(
--
Wrapper for Windows' GetForegroundWindow.
On non-Windows platforms, always returns None.
)"""
);
m.
def
(
"
Win32_SetForegroundWindow
"
, &mpl_SetForegroundWindow,
"
hwnd
"
_a,
R"""(
--
Wrapper for Windows' SetForegroundWindow.
On non-Windows platforms, does nothing.
)"""
);
m.
def
(
"
Win32_SetProcessDpiAwareness_max
"
, &mpl_SetProcessDpiAwareness_max,
R"""(
--
Set Windows' process DPI awareness to best option available.
On non-Windows platforms, does nothing.
)"""
);
}
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