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wayland: Clarify the popup position restriction purpose 

Child popups don't necessarily need to be within, but must intersect or be partially adjacent to the parent, per the xdg-positioner spec.
This commit is contained in:
Frank Praznik 2023-03-16 13:35:06 -04:00
parent c270d151b0
commit be70d9a9c7
1 changed files with 9 additions and 7 deletions
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16
src/video/wayland/SDL_waylandwindow.c
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@ -242,12 +242,14 @@ static void ConfigureWindowGeometry(SDL_Window *window)
SDL_SendWindowEvent(window, SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED, data->drawable_width, data->drawable_height);
}
static void EnsurePopupIsWithinParent(SDL_Window *window)
static void EnsurePopupPositionIsValid(SDL_Window *window)
{
/* Per the spec, popup windows *must* overlap the parent window.
* Failure to do so on a compositor that enforces this restriction
* will result in the window being spuriously closed at best, and
* a protocol violation at worst.
/* Per the xdg-positioner spec, child popup windows must intersect or at
* least be partially adjacent to the parent window.
*
* Failure to ensure this on a compositor that enforces this restriction
* can result in behavior ranging from the window being spuriously closed
* to a protocol violation.
*/
if (window->x + window->w < 0) {
window->x = -window->w;
@ -1950,7 +1952,7 @@ int Wayland_CreateWindow(_THIS, SDL_Window *window)
}
if (SDL_WINDOW_IS_POPUP(window)) {
EnsurePopupIsWithinParent(window);
EnsurePopupPositionIsValid(window);
}
data->waylandData = c;
@ -2088,7 +2090,7 @@ void Wayland_SetWindowPosition(_THIS, SDL_Window *window)
xdg_popup_get_version(wind->shell_surface.xdg.roleobj.popup.popup) >= XDG_POPUP_REPOSITION_SINCE_VERSION) {
int x, y;
EnsurePopupIsWithinParent(window);
EnsurePopupPositionIsValid(window);
GetPopupPosition(window, window->x, window->y, &x, &y);
xdg_positioner_set_offset(wind->shell_surface.xdg.roleobj.popup.positioner, x, y);
xdg_popup_reposition(wind->shell_surface.xdg.roleobj.popup.popup,