From 8cace1921823e250041f7d85d939960f33824451 Mon Sep 17 00:00:00 2001 From: Leonardo Hernandez Hernandez Date: Thu, 4 Nov 2021 08:19:13 -0600 Subject: fix crash when the last monitor is disconnected --- dwl.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/dwl.c b/dwl.c index 0619ff1..67a3cd5 100644 --- a/dwl.c +++ b/dwl.c @@ -57,7 +57,7 @@ #define MAX(A, B) ((A) > (B) ? (A) : (B)) #define MIN(A, B) ((A) < (B) ? (A) : (B)) #define CLEANMASK(mask) (mask & ~WLR_MODIFIER_CAPS) -#define VISIBLEON(C, M) ((C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags])) +#define VISIBLEON(C, M) ((M) && (C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags])) #define LENGTH(X) (sizeof X / sizeof X[0]) #define END(A) ((A) + LENGTH(A)) #define TAGMASK ((1 << LENGTH(tags)) - 1) @@ -720,10 +720,11 @@ cleanupmon(struct wl_listener *listener, void *data) wl_list_remove(&m->link); wlr_output_layout_remove(output_layout, m->wlr_output); - nmons = wl_list_length(&mons); - do // don't switch to disabled mons - selmon = wl_container_of(mons.prev, selmon, link); - while (!selmon->wlr_output->enabled && i++ < nmons); + if ((nmons = wl_list_length(&mons))) + do // don't switch to disabled mons + selmon = wl_container_of(mons.prev, selmon, link); + while (!selmon->wlr_output->enabled && i++ < nmons); + focusclient(focustop(selmon), 1); closemon(m); free(m); @@ -860,6 +861,16 @@ createmon(struct wl_listener *listener, void *data) wlr_output_layout_add(output_layout, wlr_output, r->x, r->y); sgeom = *wlr_output_layout_get_box(output_layout, NULL); + /* If length == 1 we need update selmon. + * Maybe it will change in run(). */ + if (wl_list_length(&mons) == 1) { + Client *c; + selmon = m; + /* If there is any client, set c->mon to this monitor */ + wl_list_for_each(c, &clients, link) + setmon(c, m, c->tags); + } + /* When adding monitors, the geometries of all monitors must be updated */ wl_list_for_each(m, &mons, link) { /* The first monitor in the list is the most recently added */ -- cgit v1.2.3