fix: tree sitter rendering glitches with multiple selection edits

1 files changed, 4 insertions, 2 deletions

diff --git a/helix-core/src/syntax.rs b/helix-core/src/syntax.rs
index 60d44976..4bceb73b 100644
--- a/helix-core/src/syntax.rs
+++ b/helix-core/src/syntax.rs
@@ -656,8 +656,10 @@ impl LanguageLayer {
         let edits = Self::generate_edits(old_source.slice(..), changeset);
 
         // Notify the tree about all the changes
-        for edit in edits {
-            self.tree.as_mut().unwrap().edit(&edit);
+        for edit in edits.iter().rev() {
+            // apply the edits in reverse. If we applied them in order then edit 1 would disrupt
+            // the positioning of edit 2
+            self.tree.as_mut().unwrap().edit(edit);
         }
 
         self.parse(