Zengtudor/glfw
1
0
Fork 0
mirror of https://github.com/glfw/glfw.git synced 2024-11-22 10:05:10 +00:00
Code Issues Packages Projects Releases Wiki Activity

X11: Clean up EWMH feature detection

Browse Source 
The EWMH feature detection atoms are now named and loaded the same way
as other X11 atoms.  Detection is now performed after all
non-conditional atoms have been loaded.  The EWMH detection now has
hopefully more readable comments.
This commit is contained in:
Camilla Löwy 2019-06-04 16:52:40 +02:00
parent 0c6b505619
commit fad9896d38
2 changed files with 30 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
src/x11_init.c
View File

@ -371,18 +371,11 @@ static Atom getSupportedAtom(Atom* supportedAtoms,
//
static void detectEWMH(void)
{
// First we read the _NET_SUPPORTING_WM_CHECK property on the root window
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,
_glfw.x11.NET_SUPPORTING_WM_CHECK,
XA_WINDOW,
(unsigned char**) &windowFromRoot))
{
@ -391,10 +384,12 @@ static void detectEWMH(void)
_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 it exists, it should be the XID of a top-level window
// Then we look for the same property on that window
Window* windowFromChild = NULL;
if (!_glfwGetWindowPropertyX11(*windowFromRoot,
supportingWmCheck,
_glfw.x11.NET_SUPPORTING_WM_CHECK,
XA_WINDOW,
(unsigned char**) &windowFromChild))
{
@ -404,7 +399,8 @@ static void detectEWMH(void)
_glfwReleaseErrorHandlerX11();
// It should be the ID of that same child window
// If the property exists, it should contain the XID of the window
if (*windowFromRoot != *windowFromChild)
{
XFree(windowFromRoot);
@ -415,19 +411,20 @@ static void detectEWMH(void)
XFree(windowFromRoot);
XFree(windowFromChild);
// We are now fairly sure that an EWMH-compliant window manager is running
// We are now fairly sure that an EWMH-compliant WM is currently running
// We can now start querying the WM about what features it supports by
// looking in the _NET_SUPPORTED property on the root window
// It should contain a list of supported EWMH protocol and state atoms
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);
Atom* supportedAtoms = NULL;
const unsigned long atomCount =
_glfwGetWindowPropertyX11(_glfw.x11.root,
_glfw.x11.NET_SUPPORTED,
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 =
@ -707,9 +704,6 @@ static GLFWbool initExtensions(void)
// the keyboard mapping.
createKeyTables();
// Detect whether an EWMH-conformant window manager is running
detectEWMH();
// String format atoms
_glfw.x11.NULL_ = XInternAtom(_glfw.x11.display, "NULL", False);
_glfw.x11.UTF8_STRING = XInternAtom(_glfw.x11.display, "UTF8_STRING", False);
@ -753,6 +747,10 @@ static GLFWbool initExtensions(void)
XInternAtom(_glfw.x11.display, "WM_STATE", False);
_glfw.x11.WM_DELETE_WINDOW =
XInternAtom(_glfw.x11.display, "WM_DELETE_WINDOW", False);
_glfw.x11.NET_SUPPORTED =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTED", False);
_glfw.x11.NET_SUPPORTING_WM_CHECK =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTING_WM_CHECK", False);
_glfw.x11.NET_WM_ICON =
XInternAtom(_glfw.x11.display, "_NET_WM_ICON", False);
_glfw.x11.NET_WM_PING =
@ -777,6 +775,9 @@ static GLFWbool initExtensions(void)
_glfw.x11.NET_WM_CM_Sx = XInternAtom(_glfw.x11.display, name, False);
}
// Detect whether an EWMH-conformant window manager is running
detectEWMH();
return GLFW_TRUE;
}

2
src/x11_platform.h
View File

@ -239,6 +239,8 @@ typedef struct _GLFWlibraryX11
_GLFWwindow* disabledCursorWindow;
// Window manager atoms
Atom NET_SUPPORTED;
Atom NET_SUPPORTING_WM_CHECK;
Atom WM_PROTOCOLS;
Atom WM_STATE;
Atom WM_DELETE_WINDOW;