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x11: Synthesize fullscreen size events on Openbox

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Openbox doesn't send size events when entering fullscreen, so they must be synthesized. This is not desirable on any other window manager, as it can break fullscreen positioning on multi-monitor configurations.

(cherry picked from commit e7abbf158a)
This commit is contained in:
Frank Praznik
2025-03-04 12:00:12 -05:00
parent 6aab3b9da8
commit 26d1afa29c
1 changed files with 25 additions and 2 deletions
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27
src/video/x11/SDL_x11video.c
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@@ -78,6 +78,23 @@ static bool X11_IsXWayland(Display *d)
return X11_XQueryExtension(d, "XWAYLAND", &opcode, &event, &error) == True;
}
static bool X11_CheckCurrentDesktop(const char *name)
{
SDL_Environment *env = SDL_GetEnvironment();
const char *desktopVar = SDL_GetEnvironmentVariable(env, "DESKTOP_SESSION");
if (desktopVar && SDL_strcasecmp(desktopVar, name) == 0) {
return true;
}
desktopVar = SDL_GetEnvironmentVariable(env, "XDG_CURRENT_DESKTOP");
if (desktopVar && SDL_strcasestr(desktopVar, name)) {
return true;
}
return false;
}
static SDL_VideoDevice *X11_CreateDevice(void)
{
SDL_VideoDevice *device;
@@ -256,8 +273,14 @@ static SDL_VideoDevice *X11_CreateDevice(void)
device->system_theme = SDL_SystemTheme_Get();
#endif
device->device_caps = VIDEO_DEVICE_CAPS_HAS_POPUP_WINDOW_SUPPORT |
VIDEO_DEVICE_CAPS_SENDS_FULLSCREEN_DIMENSIONS;
device->device_caps = VIDEO_DEVICE_CAPS_HAS_POPUP_WINDOW_SUPPORT;
/* Openbox doesn't send the new window dimensions when entering fullscreen, so the events must be synthesized.
* This is otherwise not wanted, as it can break fullscreen window positioning on multi-monitor configurations.
*/
if (!X11_CheckCurrentDesktop("openbox")) {
device->device_caps |= VIDEO_DEVICE_CAPS_SENDS_DISPLAY_CHANGES;
}
data->is_xwayland = X11_IsXWayland(x11_display);
if (data->is_xwayland) {