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surface: fix place_below handling

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If a subsurface is being placed below a subsurface right above it, this
should be a noop. However, `node` pointed to the subsurface that was
moved, which resulted in `subsurface->parent_pending_link` being
inserted into itself, breaking parent's pending subsurface list.

This commit separates finding the requested node and getting it's `prev`
field, fixing the issue.
This commit is contained in:
Kirill Primak 2021-08-17 15:20:37 +03:00 committed by Simon Ser
parent cdd9a60f72
commit 109405729b
1 changed files with 3 additions and 3 deletions
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6
types/wlr_surface.c
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@ -961,7 +961,7 @@ static void subsurface_handle_place_below(struct wl_client *client,
struct wl_list *node; struct wl_list *node;
if (sibling_surface == subsurface->parent) { if (sibling_surface == subsurface->parent) {
node = subsurface->parent->subsurfaces_pending_below.prev; node = &subsurface->parent->subsurfaces_pending_below;
} else { } else {
struct wlr_subsurface *sibling = struct wlr_subsurface *sibling =
subsurface_find_sibling(subsurface, sibling_surface); subsurface_find_sibling(subsurface, sibling_surface);
@ -972,11 +972,11 @@ static void subsurface_handle_place_below(struct wl_client *client,
"place_below", wl_resource_get_id(sibling_resource)); "place_below", wl_resource_get_id(sibling_resource));
return; return;
} }
node = sibling->parent_pending_link.prev; node = &sibling->parent_pending_link;
} }
wl_list_remove(&subsurface->parent_pending_link); wl_list_remove(&subsurface->parent_pending_link);
wl_list_insert(node, &subsurface->parent_pending_link); wl_list_insert(node->prev, &subsurface->parent_pending_link);
subsurface->reordered = true; subsurface->reordered = true;
} }