1 files changed, 8 insertions, 3 deletions
diff --git a/packages/svgbob/src/buffer/cell_buffer/span.rs b/packages/svgbob/src/buffer/cell_buffer/span.rs
index 28246c7..42c5f25 100644
--- a/packages/svgbob/src/buffer/cell_buffer/span.rs
+++ b/packages/svgbob/src/buffer/cell_buffer/span.rs
@@ -190,14 +190,19 @@ impl Span {
     pub fn hit_cell(&self, needle: Cell) -> bool {
         self.iter().any(|(cell, ch)| *cell == needle)
     }
+
+    /// merge as is without checking it it can
+    pub fn merge_no_check(&self, other: &Self) -> Self {
+        let mut cells = self.0.clone();
+        cells.extend(&other.0);
+        Span(cells)
+    }
 }
 
 impl Merge for Span {
     fn merge(&self, other: &Self) -> Option<Self> {
         if self.can_merge(other) {
-            let mut cells = self.0.clone();
-            cells.extend(&other.0);
-            Some(Span(cells))
+            Some(self.merge_no_check(other))
         } else {
             None
         }