From 6114dd6a838c1c4ebeb5c8f2a66f7c1e628d11d5 Mon Sep 17 00:00:00 2001 From: John Lindgren Date: Wed, 11 Oct 2023 03:37:46 -0400 Subject: [PATCH] xwayland: stop translating _NET_WM_STRUT_PARTIAL coordinates Translating the right/bottom coordinates from offsets to absolute coordinates in wlroots (rather than in the compositor) was supposed to be more reliable, since wlroots had access to the X11 screen size. It ended up being less reliable, because the screen size values (xwm->screen->width_in_pixels/height_in_pixels) are not updated when the output layout changes. So let's remove the translation from wlroots, and let the compositor figure it out. From what I can understand of the current XWayland code, the X11 screen size should generally match the overall wlr_output_layout bounding box, which the compositor has access to. --- include/wlr/xwayland/xwayland.h | 7 +++++-- xwayland/xwm.c | 14 -------------- 2 files changed, 5 insertions(+), 16 deletions(-) diff --git a/include/wlr/xwayland/xwayland.h b/include/wlr/xwayland/xwayland.h index 240ee3a5..75e9cdac 100644 --- a/include/wlr/xwayland/xwayland.h +++ b/include/wlr/xwayland/xwayland.h @@ -124,8 +124,11 @@ struct wlr_xwayland_surface { xcb_icccm_wm_hints_t *hints; xcb_size_hints_t *size_hints; /* - * _NET_WM_STRUT_PARTIAL (used by e.g. XWayland panels; - * right/bottom are translated into root x/y coordinates) + * _NET_WM_STRUT_PARTIAL (used by e.g. XWayland panels). + * Note that right/bottom values are offsets from the lower + * right corner of the X11 screen, and the exact relation + * between X11 screen coordinates and the wlr_output_layout + * depends on the XWayland implementation. */ xcb_ewmh_wm_strut_partial_t *strut_partial; diff --git a/xwayland/xwm.c b/xwayland/xwm.c index 6597af9a..92d68c7b 100644 --- a/xwayland/xwm.c +++ b/xwayland/xwm.c @@ -775,20 +775,6 @@ static void read_surface_strut_partial(struct wlr_xwm *xwm, return; } xcb_ewmh_get_wm_strut_partial_from_reply(xsurface->strut_partial, reply); - - /* - * Translate right/bottom into root x/y coordinates here since - * the compositor is ignorant of X11 screen width/height. - * - * (This could result in an incorrect position if the X11 screen - * size changes but _NET_WM_STRUT_PARTIAL doesn't. It's probably - * not worth the additional code to fix this corner case.) - */ - xsurface->strut_partial->right = - xwm->screen->width_in_pixels - xsurface->strut_partial->right; - xsurface->strut_partial->bottom = - xwm->screen->height_in_pixels - xsurface->strut_partial->bottom; - wl_signal_emit_mutable(&xsurface->events.set_strut_partial, NULL); }