Make vertical selection movement work properly.

1 files changed, 7 insertions, 0 deletions

diff --git a/helix-core/src/line_ending.rs b/helix-core/src/line_ending.rs
index e3ff6478..18ea5f9f 100644
--- a/helix-core/src/line_ending.rs
+++ b/helix-core/src/line_ending.rs
@@ -159,6 +159,13 @@ pub fn line_end_char_index(slice: &RopeSlice, line: usize) -> usize {
             .unwrap_or(0)
 }
 
+/// Fetches line `line_idx` from the passed rope slice, sans any line ending.
+pub fn line_without_line_ending<'a>(slice: &'a RopeSlice, line_idx: usize) -> RopeSlice<'a> {
+    let start = slice.line_to_char(line_idx);
+    let end = line_end_char_index(slice, line_idx);
+    slice.slice(start..end)
+}
+
 /// Returns the char index of the end of the given RopeSlice, not including
 /// any final line ending.
 pub fn rope_end_without_line_ending(slice: &RopeSlice) -> usize {