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[3.x] X11: Properly check for fullscreen toggle made through the Window Manager #62543

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merged 1 commit into from
Jun 30, 2022
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[3.x] X11: Properly check for fullscreen toggle made through the Window Manager #62543

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44 changes: 44 additions & 0 deletions platform/x11/os_x11.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1814,6 +1814,49 @@ bool OS_X11::window_maximize_check(const char *p_atom_name) const {
return retval;
}

bool OS_X11::window_fullscreen_check() const {
// Using EWMH -- Extended Window Manager Hints
Atom property = XInternAtom(x11_display, "_NET_WM_STATE", False);
Atom type;
int format;
unsigned long len;
unsigned long remaining;
unsigned char *data = nullptr;
bool retval = false;

if (property == None) {
return retval;
}

int result = XGetWindowProperty(
x11_display,
x11_window,
property,
0,
1024,
False,
XA_ATOM,
&type,
&format,
&len,
&remaining,
&data);

if (result == Success) {
Atom *atoms = (Atom *)data;
Atom wm_fullscreen = XInternAtom(x11_display, "_NET_WM_STATE_FULLSCREEN", False);
for (uint64_t i = 0; i < len; i++) {
if (atoms[i] == wm_fullscreen) {
retval = true;
break;
}
}
XFree(data);
}

return retval;
}

bool OS_X11::is_window_maximize_allowed() const {
return window_maximize_check("_NET_WM_ALLOWED_ACTIONS");
}
Expand Down Expand Up @@ -2663,6 +2706,7 @@ void OS_X11::process_xevents() {
switch (event.type) {
case Expose: {
DEBUG_LOG_X11("[%u] Expose window=%lu, count='%u' \n", frame, event.xexpose.window, event.xexpose.count);
current_videomode.fullscreen = window_fullscreen_check();

Main::force_redraw();
} break;
Expand Down
1 change: 1 addition & 0 deletions platform/x11/os_x11.h
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Original file line number Diff line number Diff line change
Expand Up @@ -247,6 +247,7 @@ class OS_X11 : public OS_Unix {
void _window_changed(XEvent *event);

bool window_maximize_check(const char *p_atom_name) const;
bool window_fullscreen_check() const;
bool is_window_maximize_allowed() const;

public:
Expand Down