Fix crash

There might be a better way to track cursor state such that these checks
aren't necessary.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/grid.rs b/src/grid.rs
index d62903c9..c3473d8c 100644
--- a/src/grid.rs
+++ b/src/grid.rs
@@ -134,6 +134,10 @@ impl<T> Grid<T> {
         }
     }
 
+    pub fn contains(&self, cursor: &Cursor) -> bool {
+        self.lines > cursor.line && self.cols > cursor.col
+    }
+
     /// Swap two lines in the grid
     ///
     /// This could have used slice::swap internally, but we are able to have