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subsurface: handle NULL parent in get_root_surface
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2 changed files with 5 additions and 1 deletions
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@ -220,7 +220,8 @@ struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
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struct wl_list *resource_list);
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/**
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* Get the root of the subsurface tree for this surface.
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* Get the root of the subsurface tree for this surface. Can return NULL if
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* a surface in the tree has been destroyed.
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*/
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struct wlr_surface *wlr_surface_get_root_surface(struct wlr_surface *surface);
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@ -1061,6 +1061,9 @@ struct wlr_surface *wlr_surface_get_root_surface(struct wlr_surface *surface) {
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if (subsurface == NULL) {
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break;
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}
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if (subsurface->parent == NULL) {
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return NULL;
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}
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surface = subsurface->parent;
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}
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return surface;
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