vis: simplify modes implementation

Make replace mode a child of insert mode and visual line a
child of visual mode. This means any key binding for the
former is automatically available in the latter. Also keys
can not be unmapped solely from the child modes.

1 files changed, 2 insertions, 0 deletions

diff --git a/vis.c b/vis.c
index 42bc0a0..96ee002 100644
--- a/vis.c
+++ b/vis.c
@@ -662,6 +662,8 @@ static const char *vis_keys_raw(Vis *vis, Buffer *buf, const char *input) {
 		}
 
 		for (; mode && !binding && !prefix; mode = mode->parent) {
+			if (!mode->bindings)
+				continue;
 			binding = map_get(mode->bindings, start);
 			/* "<" is never treated as a prefix because it is used to denote
 			 * special key symbols */