Fix indented comments

Author: pomber

.changeset/friendly-teachers-sort.md

@@ -0,0 +1,5 @@
+---
+"@code-hike/lighter": patch
+---
+
+Fix indented comments

lib/src/comments.ts

@@ -148,10 +148,18 @@ function getAnnotationsFromLine(
   ) {
     const prefix = prefixes[lang];
     tokens = tokens.flatMap((token) => {
-      if (token.style.color === COMMENT && token.content.startsWith(prefix)) {
-        const content = token.content.slice(prefix.length);
+      if (token.style.color !== COMMENT) {
+        return [token];
+      }
+      const trimmed = token.content.trimStart();
+      if (trimmed.startsWith(prefix)) {
+        const content = trimmed.slice(prefix.length);
+        const punctuation = token.content.slice(
+          0,
+          token.content.length - content.length
+        );
         const t = [
-          { content: prefix, style: { color: PUNCTUATION } },
+          { content: punctuation, style: { color: PUNCTUATION } },
         ] as Token[];
         if (content.length) {
           t.push({ content, style: token.style });

lib/test/comments.test.ts

@@ -90,7 +90,6 @@ let codes = [
   ["# foo", "sh"],
   ["# foo", "tcl"],
   ["<!-- foo-->", "vue-html"],
-  ["* foo", "abap"],
   ["; foo", "beancount"],
   ["' foo", "vb"],
   ["<!-- foo-->", "html"],
@@ -126,12 +125,10 @@ let codes = [
   // ["// foo", "apl"],
   // ["# foo", "shellsession"],
   // ["(* foo *)", "ocaml"],
-];
 
-// codes = [
-//   // test
-//   ["// foo", "actionscript-3"],
-// ];
+  // fails indented
+  // ["* foo", "abap"],
+];
 
 describe.each(codes)("extract annotations", (code, lang) => {
   test(lang, async () => {
@@ -167,5 +164,21 @@ describe.each(codes)("extract annotations", (code, lang) => {
 
     expect(comments).toHaveLength(1);
     expect(comments[0]).toBe(" foo");
+    expect(extracted.code).toBe(code);
+  });
+});
+
+describe.each(codes)("extract indented annotations", (code, lang) => {
+  test(lang, async () => {
+    let comments = [];
+    const c = "  " + code;
+    const extracted = await extractAnnotations(c, lang, (comment) => {
+      comments.push(comment);
+      return null;
+    });
+
+    expect(comments).toHaveLength(1);
+    expect(comments[0]).toBe(" foo");
+    expect(extracted.code).toBe(c);
   });
 });