From 4f6256c486aa0484134e3e3ddf14b0a0281b060a Mon Sep 17 00:00:00 2001
From: Nigel Ihza Firdausy <106657905+Ni-zav@users.noreply.github.com>
Date: Sat, 10 Oct 2026 15:49:32 +0700
Subject: [PATCH] fix(script): keep pending TextDocument baseline reads in sync
 (#549)

---
 crates/script/src/prelude.js | 11 ++++++++--
 crates/script/src/tests.rs   | 40 ++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/crates/script/src/prelude.js b/crates/script/src/prelude.js
index f52765e7..76155b82 100644
--- a/crates/script/src/prelude.js
+++ b/crates/script/src/prelude.js
@@ -480,9 +480,16 @@ TextDocument.prototype = {
   get smallCaps() { return this.__style("smallCaps", false); },
   set smallCaps(v) { this.__set("smallCaps", !!v); },
   get superscript() { return this.__style("baseline", "normal") === "superscript"; },
-  set superscript(v) { this.__set("superscript", !!v); },
+  set superscript(v) {
+    // The pending document reads the same canonical baseline that setValue will apply.
+    if (v) this.__set("baseline", "superscript");
+    else if (this.superscript) this.__set("baseline", "normal");
+  },
   get subscript() { return this.__style("baseline", "normal") === "subscript"; },
-  set subscript(v) { this.__set("subscript", !!v); },
+  set subscript(v) {
+    if (v) this.__set("baseline", "subscript");
+    else if (this.subscript) this.__set("baseline", "normal");
+  },
   get tsume() { return this.__style("tsume", 0); },
   set tsume(v) { this.__set("tsume", __num(v)); },
   get boxText() { return !!(this.__base && this.__base.box_size); },
diff --git a/crates/script/src/tests.rs b/crates/script/src/tests.rs
index 10deb79b..60f59ca3 100644
--- a/crates/script/src/tests.rs
+++ b/crates/script/src/tests.rs
@@ -524,3 +524,43 @@ fn comp_preserves_nested_frame_rate_and_resolution() {
     let (_, c) = comp_named(&s, "Nested");
     assert!(c.preserve_frame_rate && c.preserve_resolution);
 }
+
+#[test]
+fn text_document_baseline_flags_reflect_pending_edits_and_applied_value() {
+    let mut s = session();
+    let o = ok(
+        &mut s,
+        r#"
+        var comp = app.project.items.addComp("Baseline", 64, 64, 1, 1, 24);
+        var src = comp.layers.addText("AB").text.sourceText;
+        var doc = src.value;
+        doc.superscript = true;
+        var pendingSuper = [doc.superscript, doc.subscript];
+        doc.text = doc.superscript ? "super" : "normal";
+        src.setValue(doc);
+        var appliedSuper = [src.value.text, src.value.superscript, src.value.subscript];
+        doc = src.value;
+        doc.subscript = true;
+        var pendingSub = [doc.superscript, doc.subscript];
+        src.setValue(doc);
+        var appliedSub = [src.value.superscript, src.value.subscript];
+        doc = src.value;
+        doc.subscript = false;
+        var cleared = [doc.superscript, doc.subscript];
+        src.setValue(doc);
+        var appliedClear = [src.value.superscript, src.value.subscript];
+        doc = src.value;
+        doc.superscript = true;
+        doc.superscript = false;
+        var repeatClear = [doc.superscript, doc.subscript];
+        [pendingSuper, appliedSuper, pendingSub, appliedSub, cleared, appliedClear, repeatClear];
+        "#,
+    );
+    assert_eq!(
+        o.result,
+        json!([
+            [true, false], ["super", true, false], [false, true], [false, true],
+            [false, false], [false, false], [false, false]
+        ])
+    );
+}