Refactor how InsetCompletionHide hook parameter is computed

Keep track of inserted ranges instead of trying to re-derive them.

Fixes #3556

1 files changed, 2 insertions, 0 deletions

diff --git a/src/range.hh b/src/range.hh
index eb8be269..21443b51 100644
--- a/src/range.hh
+++ b/src/range.hh
@@ -24,6 +24,8 @@ struct Range
     {
         return hash_values(range.begin, range.end);
     }
+
+    bool empty() const { return begin == end; }
 };
 
 }