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matplotlib/src/_c_internal_utils.c at doc-git · timhoffm/matplotlib · GitHub
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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
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. On other platforms, always returns True."
},
{
"Win32_GetCurrentProcessExplicitAppUserModelID"
,
(
PyCFunction
)
mpl_GetCurrentProcessExplicitAppUserModelID
,
METH_NOARGS
,
"Win32_GetCurrentProcessExplicitAppUserModelID()\n--\n\n"
"Wrapper for Windows's GetCurrentProcessExplicitAppUserModelID. On \n"
"non-Windows platforms, always returns None."
},
{
"Win32_SetCurrentProcessExplicitAppUserModelID"
,
(
PyCFunction
)
mpl_SetCurrentProcessExplicitAppUserModelID
,
METH_O
,
"Win32_SetCurrentProcessExplicitAppUserModelID(appid, /)\n--\n\n"
"Wrapper for Windows's SetCurrentProcessExplicitAppUserModelID. On \n"
"non-Windows platforms, a no-op."
},
{
"Win32_GetForegroundWindow"
,
(
PyCFunction
)
mpl_GetForegroundWindow
,
METH_NOARGS
,
"Win32_GetForegroundWindow()\n--\n\n"
"Wrapper for Windows' GetForegroundWindow. On non-Windows platforms, \n"
"always returns None."
},
{
"Win32_SetForegroundWindow"
,
(
PyCFunction
)
mpl_SetForegroundWindow
,
METH_O
,
"Win32_SetForegroundWindow(hwnd, /)\n--\n\n"
"Wrapper for Windows' SetForegroundWindow. On non-Windows platforms, \n"
"a no-op."
},
{
NULL
,
NULL
}};
// sentinel.
static
PyModuleDef
util_module
=
{
PyModuleDef_HEAD_INIT
,
"_c_internal_utils"
,
""
,
0
,
functions
,
NULL
,
NULL
,
NULL
,
NULL
};
#pragma
GCC visibility push(default)
PyMODINIT_FUNC
PyInit__c_internal_utils
(
void
)
{
return
PyModule_Create
(
&
util_module
);
}
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