fix(es/codegen): Fix wrong sourcemap when there are new lines in tpl (#…

…9578)

**Description:**

1. split quasi by '\n' 
2. add the mapping between the original string and the generated string one by one.

<img width="873" alt="image"
src="https://github.com/user-attachments/assets/8a03da7f-2d22-4dd5-9bac-220418b10911">

**Related issue:**

 - Closes #9567

.changeset/gentle-cycles-repair.md

@@ -0,0 +1,6 @@
+---
+swc_ecma_codegen: patch
+swc_core: patch
+---
+
+fix(es/codegen): fix wrong sourcemap when there are new lines in tpl

crates/swc/tests/fixture/sourcemap/issue-9567/input/.swcrc

@@ -0,0 +1,22 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "tsx": true
+        },
+        "target": "es2015",
+        "externalHelpers": true,
+        "loose": false,
+        "minify": {
+            "compress": true,
+            "mangle": {
+                "toplevel": true
+            }
+        }
+    },
+    "module": {
+        "type": "es6"
+    },
+    "minify": true,
+    "sourceMaps": true
+}

crates/swc/tests/fixture/sourcemap/issue-9567/input/index.js

@@ -0,0 +1,12 @@
+function foo(span, error) {
+  span.setStatus({
+      message: `${error.message} ${
+          error.code
+              ? `\nMon\tgo\nos
+e Error\n C
+od\ne: ${error.code}`
+              : "1\n23"
+      }`,
+  });
+}
+foo();

crates/swc/tests/fixture/sourcemap/issue-9567/output/index.js

@@ -0,0 +1,7 @@
+function e(e,o){e.setStatus({message:`${o.message} ${o.code?`
+Mon	go
+os
+e Error
+ C
+od
+e: ${o.code}`:"1\n23"}`})}e();

crates/swc/tests/fixture/sourcemap/issue-9567/output/index.map

@@ -0,0 +1,18 @@
+{
+  "mappings": "AAAA,SAASA,EAAIC,CAAI,CAAEC,CAAK,EACtBD,EAAKE,SAAS,CAAC,CACXC,QAAS,CAAC,EAAEF,EAAME,OAAO,CAAC,CAAC,EACvBF,EAAMG,IAAI,CACJ,CAAC;AAAE;AAAS;AAC5B;AAAS;AACT;AAAI,GAAG,EAAEH,EAAMG,IAAI,CAAC,CAAC,CACL,QACT,CAAC,AACN,EACF,CACAL",
+  "names": [
+    "foo",
+    "span",
+    "error",
+    "setStatus",
+    "message",
+    "code"
+  ],
+  "sources": [
+    "../../input/index.js"
+  ],
+  "sourcesContent": [
+    "function foo(span, error) {\n  span.setStatus({\n      message: `${error.message} ${\n          error.code\n              ? `\\nMon\\tgo\\nos\ne Error\\n C\nod\\ne: ${error.code}`\n              : \"1\\n23\"\n      }`,\n  });\n}\nfoo();\n"
+  ],
+  "version": 3
+}

crates/swc_ecma_codegen/Cargo.toml

@@ -20,6 +20,7 @@ bench = false
 memchr     = { workspace = true }
 num-bigint = { workspace = true, features = ["serde"] }
 once_cell  = { workspace = true }
+regex      = { workspace = true }
 serde      = { workspace = true }
 sourcemap  = { workspace = true }
 tracing    = { workspace = true }

crates/swc_ecma_codegen/src/lib.rs

@@ -139,6 +139,8 @@ fn replace_close_inline_script(raw: &str) -> Cow<str> {
     Cow::Owned(result)
 }
 
+static NEW_LINE_TPL_REGEX: Lazy<regex::Regex> = Lazy::new(|| regex::Regex::new(r"\\n|\n").unwrap());
+
 impl<'a, W, S: SourceMapper> Emitter<'a, W, S>
 where
     W: WriteJs,
@@ -1979,17 +1981,31 @@ where
 
     #[emitter]
     fn emit_quasi(&mut self, node: &TplElement) -> Result {
-        srcmap!(node, true);
-
         let raw = node.raw.replace("\r\n", "\n").replace('\r', "\n");
         if self.cfg.minify || (self.cfg.ascii_only && !node.raw.is_ascii()) {
             let v = get_template_element_from_raw(&raw, self.cfg.ascii_only);
-            self.wr.write_str_lit(DUMMY_SP, &v)?;
+            let span = node.span();
+
+            let mut last_offset_gen = 0;
+            let mut last_offset_origin = 0;
+            for ((offset_gen, _), mat) in v
+                .match_indices('\n')
+                .zip(NEW_LINE_TPL_REGEX.find_iter(&raw))
+            {
+                self.wr
+                    .add_srcmap(span.lo + BytePos(last_offset_origin as u32))?;
+                self.wr
+                    .write_str_lit(DUMMY_SP, &v[last_offset_gen..=offset_gen])?;
+                last_offset_gen = offset_gen + 1;
+                last_offset_origin = mat.end();
+            }
+            self.wr
+                .add_srcmap(span.lo + BytePos(last_offset_origin as u32))?;
+            self.wr.write_str_lit(DUMMY_SP, &v[last_offset_gen..])?;
+            self.wr.add_srcmap(span.hi)?;
         } else {
-            self.wr.write_str_lit(DUMMY_SP, &raw)?;
+            self.wr.write_str_lit(node.span(), &raw)?;
         }
-
-        srcmap!(node, false);
     }
 
     #[emitter]