From 5841954f58702ba2eabc17d96f0bf167cb13af24 Mon Sep 17 00:00:00 2001
From: Nathan Vegdahl
Date: Thu, 22 Jul 2021 11:17:03 -0700
Subject: Calculate the line that the range head is on correctly.

---
 helix-core/src/selection.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'helix-core')

diff --git a/helix-core/src/selection.rs b/helix-core/src/selection.rs
index 3d4ee768..6ca52ebf 100644
--- a/helix-core/src/selection.rs
+++ b/helix-core/src/selection.rs
@@ -73,6 +73,18 @@ impl Range {
         std::cmp::max(self.anchor, self.head)
     }
 
+    /// The line number that the head is on (using 1-width semantics).
+    #[inline]
+    #[must_use]
+    pub fn head_line(&self, text: RopeSlice) -> usize {
+        let head = if self.anchor < self.head {
+            prev_grapheme_boundary(text, self.head)
+        } else {
+            self.head
+        };
+        text.char_to_line(head)
+    }
+
     /// The (inclusive) range of lines that the range overlaps.
     #[inline]
     #[must_use]
-- 
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