feat(isolated_declarations): print jsdoc comments (#5858)

crates/oxc_codegen/src/gen.rs

@@ -3550,6 +3550,7 @@ impl<'a> Gen for TSInterfaceDeclaration<'a> {
         p.print_curly_braces(self.body.span, self.body.body.is_empty(), |p| {
             for item in &self.body.body {
                 p.print_indent();
+                p.print_leading_comments(item.span().start);
                 item.print(p, ctx);
                 p.print_semicolon();
                 p.print_soft_newline();

crates/oxc_isolated_declarations/examples/isolated_declarations.rs

@@ -2,7 +2,7 @@
 use std::{env, path::Path};
 
 use oxc_allocator::Allocator;
-use oxc_codegen::CodeGenerator;
+use oxc_codegen::{CodeGenerator, CommentOptions};
 use oxc_isolated_declarations::IsolatedDeclarations;
 use oxc_parser::Parser;
 use oxc_span::SourceType;
@@ -32,8 +32,15 @@ fn main() {
     println!("Original:\n");
     println!("{source_text}\n");
 
-    let ret = IsolatedDeclarations::new(&allocator).build(&ret.program);
-    let printed = CodeGenerator::new().build(&ret.program).source_text;
+    let id_ret = IsolatedDeclarations::new(&allocator).build(&ret.program);
+    let printed = CodeGenerator::new()
+        .enable_comment(
+            &source_text,
+            ret.trivias,
+            CommentOptions { preserve_annotate_comments: false },
+        )
+        .build(&id_ret.program)
+        .source_text;
 
     println!("Dts Emit:\n");
     println!("{printed}\n");

crates/oxc_isolated_declarations/src/module.rs

@@ -8,12 +8,12 @@ use crate::{diagnostics::default_export_inferred, IsolatedDeclarations};
 impl<'a> IsolatedDeclarations<'a> {
     pub fn transform_export_named_declaration(
         &mut self,
-        decl: &ExportNamedDeclaration<'a>,
+        prev_decl: &ExportNamedDeclaration<'a>,
     ) -> Option<ExportNamedDeclaration<'a>> {
-        let decl = self.transform_declaration(decl.declaration.as_ref()?, false)?;
+        let decl = self.transform_declaration(prev_decl.declaration.as_ref()?, false)?;
 
         Some(self.ast.export_named_declaration(
-            decl.span(),
+            prev_decl.span,
             Some(decl),
             self.ast.vec(),
             None,

crates/oxc_isolated_declarations/tests/mod.rs

@@ -3,7 +3,7 @@ mod deno;
 use std::{fs, path::Path, sync::Arc};
 
 use oxc_allocator::Allocator;
-use oxc_codegen::CodeGenerator;
+use oxc_codegen::{CodeGenerator, CommentOptions};
 use oxc_isolated_declarations::IsolatedDeclarations;
 use oxc_parser::Parser;
 use oxc_span::SourceType;
@@ -11,15 +11,22 @@ use oxc_span::SourceType;
 fn transform(path: &Path, source_text: &str) -> String {
     let allocator = Allocator::default();
     let source_type = SourceType::from_path(path).unwrap();
-    let program = Parser::new(&allocator, source_text, source_type).parse().program;
+    let parser_ret = Parser::new(&allocator, source_text, source_type).parse();
 
-    let ret = IsolatedDeclarations::new(&allocator).build(&program);
-    let code = CodeGenerator::new().build(&ret.program).source_text;
+    let id_ret = IsolatedDeclarations::new(&allocator).build(&parser_ret.program);
+    let code = CodeGenerator::new()
+        .enable_comment(
+            source_text,
+            parser_ret.trivias,
+            CommentOptions { preserve_annotate_comments: false },
+        )
+        .build(&id_ret.program)
+        .source_text;
 
     let mut snapshot = format!("==================== .D.TS ====================\n\n{code}\n\n");
-    if !ret.errors.is_empty() {
+    if !id_ret.errors.is_empty() {
         let source = Arc::new(source_text.to_string());
-        let error_messages = ret
+        let error_messages = id_ret
             .errors
             .iter()
             .map(|d| d.clone().with_source_code(Arc::clone(&source)))

napi/transform/src/isolated_declaration.rs

@@ -1,6 +1,6 @@
 use napi_derive::napi;
 use oxc_allocator::Allocator;
-use oxc_codegen::CodegenReturn;
+use oxc_codegen::{CodegenReturn, CommentOptions};
 use oxc_isolated_declarations::IsolatedDeclarations;
 use oxc_span::SourceType;
 
@@ -47,5 +47,11 @@ pub fn isolated_declaration(
 pub(crate) fn build_declarations(ctx: &TransformContext<'_>) -> CodegenReturn {
     let transformed_ret = IsolatedDeclarations::new(ctx.allocator).build(&ctx.program());
     ctx.add_diagnostics(transformed_ret.errors);
-    ctx.codegen().build(&transformed_ret.program)
+    ctx.codegen()
+        .enable_comment(
+            ctx.source_text(),
+            ctx.trivias.clone(),
+            CommentOptions { preserve_annotate_comments: false },
+        )
+        .build(&transformed_ret.program)
 }

napi/transform/test.mjs

@@ -4,23 +4,38 @@ import oxc from './index.js';
 console.log(`Testing on ${process.platform}-${process.arch}`);
 
 function test(ret, expected) {
-  console.log(ret.code);
-  console.log(ret.map);
-  for (const error of ret.errors) {
-    console.log(error);
-  }
   assert.equal(ret.code, expected.code);
   assert.deepEqual(ret.map, expected.map);
   assert(ret.errors.length == 0);
 }
 
-test(oxc.isolatedDeclaration('test.ts', 'class A {}', { sourcemap: true }), {
-  code: 'declare class A {}\n',
+const id = `
+/**
+ * jsdoc 1
+ */
+export class A {
+  /**
+   * jsdoc 2
+   */
+  foo = "bar";
+}
+`;
+
+test(oxc.isolatedDeclaration('test.ts', id, { sourcemap: true }), {
+  code: '/**\n' +
+    '* jsdoc 1\n' +
+    '*/\n' +
+    'export declare class A {\n' +
+    '\t/**\n' +
+    '\t* jsdoc 2\n' +
+    '\t*/\n' +
+    '\tfoo: string;\n' +
+    '}\n',
   map: {
-    mappings: 'AAAA,cAAM,EAAE,CAAE',
+    mappings: ';;;AAIA,OAAO,cAAM,EAAE;;;;CAIb;AACD',
     names: [],
     sources: ['test.ts'],
-    sourcesContent: ['class A {}'],
+    sourcesContent: [id],
     version: 3,
   },
 });
@@ -67,3 +82,5 @@ test(
       '$RefreshReg$(_c, "App");\n',
   },
 );
+
+console.log('Success.');