Merge pull request #3075 from jramosg/fix/insert-semicolon-sof

Fix insert semicolon when a multi-line form starts at the beginning of the file
Fixes #3072

Author: jramosg

CHANGELOG.md

@@ -7,6 +7,7 @@ Changes to Calva.
 - Fix: [Connecting a REPL sequence disconnects the previous prematurely](https://github.com/BetterThanTomorrow/calva/issues/3065)
 - Fix: [Toggle Line Comment produces incorrect output for multi-line selections](https://github.com/BetterThanTomorrow/calva/issues/3066)
 - Fix: [Toggle Line Comment loses the selection when you run the command](https://github.com/BetterThanTomorrow/calva/issues/3067)
+- Fix: [Insert Semicolon does not work correctly in the first line of a file](https://github.com/BetterThanTomorrow/calva/issues/3072)
 
 ## [2.0.554] - 2026-02-17
 

src/cursor-doc/paredit.ts

@@ -2617,7 +2617,7 @@ export function _semiColonWouldBreakStructureWhere(
 
 export async function insertSemiColon(doc: EditableDocument, p = doc.selections[0].active) {
   const wouldBreakWhere = _semiColonWouldBreakStructureWhere(doc, p);
-  if (wouldBreakWhere) {
+  if (wouldBreakWhere !== false) {
     const cursor = doc.getTokenCursor(p);
     const lineText = doc.model.getLineText(cursor.line);
     const indent = lineText.match(/^\s*/)[0];

src/extension-test/unit/cursor-doc/paredit-test.ts

@@ -3326,6 +3326,12 @@ describe('paredit util', () => {
       await paredit.insertSemiColon(a);
       expect(textAndSelection(a)).toEqual(textAndSelection(b));
     });
+    it('inserts a newline to preserve structure at offset 0', async () => {
+      const a = docFromTextNotation('|(defn hi []•  (prn "hi"))');
+      const b = docFromTextNotation(';|•(defn hi []•  (prn "hi"))');
+      await paredit.insertSemiColon(a);
+      expect(textAndSelection(a)).toEqual(textAndSelection(b));
+    });
   });
 
   describe('_semiColonWouldBreakStructureWhere', () => {
@@ -3412,5 +3418,12 @@ describe('paredit util', () => {
         paredit._semiColonWouldBreakStructureWhere(docFromTextNotation('|a (b {•} c•) d '))
       ).toBe(2);
     });
+    it('returns 0 when a multi-line form starts at offset 0', () => {
+      expect(
+        paredit._semiColonWouldBreakStructureWhere(
+          docFromTextNotation('|(defn hi []•  (prn "hi"))')
+        )
+      ).toBe(0);
+    });
   });
 });