// Check whether the running window manager is EWMH-compliant
//
static void detectEWMH(void)
{
Window* windowFromRoot = NULL;
Window* windowFromChild = NULL;
// First we need a couple of atoms
const Atom supportingWmCheck =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTING_WM_CHECK", False);
const Atom wmSupported =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTED", False);
// Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
if (_glfwGetWindowPropertyX11(_glfw.x11.root,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromRoot) != 1)
{
if (windowFromRoot)
XFree(windowFromRoot);
return;
}
_glfwGrabErrorHandlerX11();
// It should be the ID of a child window (of the root)
// Then we look for the same property on the child window
if (_glfwGetWindowPropertyX11(*windowFromRoot,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromChild) != 1)
{
XFree(windowFromRoot);
if (windowFromChild)
XFree(windowFromChild);
return;
}
_glfwReleaseErrorHandlerX11();
// It should be the ID of that same child window
if (*windowFromRoot != *windowFromChild)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return;
}
XFree(windowFromRoot);
XFree(windowFromChild);
// We are now fairly sure that an EWMH-compliant window manager is running
Atom* supportedAtoms;
unsigned long atomCount;
// Now we need to check the _NET_SUPPORTED property of the root window
// It should be a list of supported WM protocol and state atoms
atomCount = _glfwGetWindowPropertyX11(_glfw.x11.root,
wmSupported,
XA_ATOM,
(unsigned char**) &supportedAtoms);
// See which of the atoms we support that are supported by the WM
_glfw.x11.NET_WM_STATE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
_glfw.x11.NET_WM_STATE_ABOVE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
_glfw.x11.NET_WM_STATE_FULLSCREEN =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
_glfw.x11.NET_WM_STATE_MAXIMIZED_VERT =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_VERT");
_glfw.x11.NET_WM_STATE_MAXIMIZED_HORZ =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_HORZ");
_glfw.x11.NET_WM_FULLSCREEN_MONITORS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
_glfw.x11.NET_WM_WINDOW_TYPE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE");
_glfw.x11.NET_WM_WINDOW_TYPE_NORMAL =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE_NORMAL");
_glfw.x11.NET_ACTIVE_WINDOW =
getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
_glfw.x11.NET_FRAME_EXTENTS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
_glfw.x11.NET_REQUEST_FRAME_EXTENTS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");
XFree(supportedAtoms);
}
// Check whether the running window manager is EWMH-compliant
//
static void detectEWMH(void)
{
Window* windowFromRoot = NULL;
Window* windowFromChild = NULL;
// First we need a couple of atoms, which should already be there
Atom supportingWmCheck =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTING_WM_CHECK", True);
Atom wmSupported =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTED", True);
if (supportingWmCheck == None || wmSupported == None)
return;
// Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
if (_glfwGetWindowProperty(_glfw.x11.root,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromRoot) != 1)
{
if (windowFromRoot)
XFree(windowFromRoot);
return;
}
_glfwGrabXErrorHandler();
// It should be the ID of a child window (of the root)
// Then we look for the same property on the child window
if (_glfwGetWindowProperty(*windowFromRoot,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromChild) != 1)
{
XFree(windowFromRoot);
if (windowFromChild)
XFree(windowFromChild);
return;
}
_glfwReleaseXErrorHandler();
// It should be the ID of that same child window
if (*windowFromRoot != *windowFromChild)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return;
}
XFree(windowFromRoot);
XFree(windowFromChild);
// We are now fairly sure that an EWMH-compliant window manager is running
Atom* supportedAtoms;
unsigned long atomCount;
// Now we need to check the _NET_SUPPORTED property of the root window
// It should be a list of supported WM protocol and state atoms
atomCount = _glfwGetWindowProperty(_glfw.x11.root,
wmSupported,
XA_ATOM,
(unsigned char**) &supportedAtoms);
// See which of the atoms we support that are supported by the WM
_glfw.x11.NET_WM_STATE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
_glfw.x11.NET_WM_STATE_ABOVE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
_glfw.x11.NET_WM_STATE_FULLSCREEN =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
_glfw.x11.NET_WM_FULLSCREEN_MONITORS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
_glfw.x11.NET_WM_NAME =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_NAME");
_glfw.x11.NET_WM_ICON_NAME =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_ICON_NAME");
_glfw.x11.NET_WM_PID =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PID");
_glfw.x11.NET_WM_PING =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PING");
_glfw.x11.NET_ACTIVE_WINDOW =
getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
_glfw.x11.NET_FRAME_EXTENTS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
_glfw.x11.NET_REQUEST_FRAME_EXTENTS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");
_glfw.x11.NET_WM_BYPASS_COMPOSITOR =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_BYPASS_COMPOSITOR");
XFree(supportedAtoms);
}
static void initEWMH(void)
{
Window* windowFromRoot = NULL;
Window* windowFromChild = NULL;
// First we need a couple of atoms, which should already be there
Atom supportingWmCheck =
XInternAtom(_glfwLibrary.X11.display, "_NET_SUPPORTING_WM_CHECK", True);
Atom wmSupported =
XInternAtom(_glfwLibrary.X11.display, "_NET_SUPPORTED", True);
if (supportingWmCheck == None || wmSupported == None)
return;
// Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
if (getWindowProperty(_glfwLibrary.X11.root,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromRoot) != 1)
{
XFree(windowFromRoot);
return;
}
// It should be the ID of a child window (of the root)
// Then we look for the same property on the child window
if (getWindowProperty(*windowFromRoot,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromChild) != 1)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return;
}
// It should be the ID of that same child window
if (*windowFromRoot != *windowFromChild)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return;
}
XFree(windowFromRoot);
XFree(windowFromChild);
// We are now fairly sure that an EWMH-compliant window manager is running
Atom* supportedAtoms;
unsigned long atomCount;
// Now we need to check the _NET_SUPPORTED property of the root window
// It should be a list of supported WM protocol and state atoms
atomCount = getWindowProperty(_glfwLibrary.X11.root,
wmSupported,
XA_ATOM,
(unsigned char**) &supportedAtoms);
// See which of the atoms we support that are supported by the WM
_glfwLibrary.X11.wmState =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
_glfwLibrary.X11.wmStateFullscreen =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
_glfwLibrary.X11.wmName =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_NAME");
_glfwLibrary.X11.wmIconName =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_ICON_NAME");
_glfwLibrary.X11.wmPing =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PING");
_glfwLibrary.X11.wmActiveWindow =
getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
XFree(supportedAtoms);
_glfwLibrary.X11.hasEWMH = GL_TRUE;
}