From b10ff6d304580f9ae5f7cff6500c177aa258ea41 Mon Sep 17 00:00:00 2001
From: ldm0 <ldm2993593805@163.com>
Date: Fri, 2 Oct 2026 15:06:33 +0800
Subject: [PATCH] feat(media): expose native media stream track interface
 objects

---
 .../src/context_bootstrap/specs/registry.rs   |  8 ++++
 .../tests/media_stream_track_interfaces.rs    | 44 +++++++++++++++++++
 moli-renderer-v8/src/script_vm/tests/mod.rs   |  1 +
 moli-renderer-v8/src/web_api_interfaces.rs    |  2 +
 4 files changed, 55 insertions(+)
 create mode 100644 moli-renderer-v8/src/script_vm/tests/media_stream_track_interfaces.rs

diff --git a/moli-renderer-v8/src/context_bootstrap/specs/registry.rs b/moli-renderer-v8/src/context_bootstrap/specs/registry.rs
index 0f1d0f1aab..428ccb8924 100644
--- a/moli-renderer-v8/src/context_bootstrap/specs/registry.rs
+++ b/moli-renderer-v8/src/context_bootstrap/specs/registry.rs
@@ -548,6 +548,14 @@ const CONSTRUCTOR_SPECS_BEFORE_STREAMS: &[ConstructorSpec] = &[
         interface: web_api_interfaces::InputDeviceInfo::DESCRIPTOR,
         kind: ConstructorKind::Illegal,
     },
+    ConstructorSpec {
+        interface: web_api_interfaces::MediaStreamTrack::DESCRIPTOR,
+        kind: ConstructorKind::Illegal,
+    },
+    ConstructorSpec {
+        interface: web_api_interfaces::CanvasCaptureMediaStreamTrack::DESCRIPTOR,
+        kind: ConstructorKind::Illegal,
+    },
     ConstructorSpec {
         interface: web_api_interfaces::MediaDevices::DESCRIPTOR,
         kind: ConstructorKind::Illegal,
diff --git a/moli-renderer-v8/src/script_vm/tests/media_stream_track_interfaces.rs b/moli-renderer-v8/src/script_vm/tests/media_stream_track_interfaces.rs
new file mode 100644
index 0000000000..5a799d6a99
--- /dev/null
+++ b/moli-renderer-v8/src/script_vm/tests/media_stream_track_interfaces.rs
@@ -0,0 +1,44 @@
+use super::*;
+
+#[test]
+fn media_stream_track_interfaces_preserve_native_inheritance_and_realm_contracts() {
+    for url in [
+        "https://media-stream-track-interfaces.test/",
+        "http://media-stream-track-interfaces.test/",
+        "http://localhost/",
+    ] {
+        let mut vm = new_storage_page_task_executor_test_vm(url);
+        vm.eval("document.body.innerHTML = '<iframe id=child></iframe>'")
+            .unwrap();
+        assert_eq!(vm.eval(r#"(() => {
+  const assert = (ok, message) => { if (!ok) throw Error(message); };
+  {
+    const realms = [window, document.getElementById('child').contentWindow];
+    for (const w of realms) {
+      for (const [name, parentName] of [["MediaStreamTrack","EventTarget"],["CanvasCaptureMediaStreamTrack","MediaStreamTrack"]]) {
+        if (false && !w.isSecureContext) {
+          assert(!(name in w), name + ' hidden in an insecure realm');
+          continue;
+        }
+        const C = w[name], parent = w[parentName];
+        assert(typeof C === 'function' && C.name === name && C.length === 0, name + ' interface object');
+        const descriptor = Object.getOwnPropertyDescriptor(w, name);
+        assert(descriptor.writable && descriptor.configurable && !descriptor.enumerable, name + ' global descriptor');
+        assert(Object.getPrototypeOf(C.prototype) === parent.prototype, name + ' prototype inheritance');
+        assert(Object.getPrototypeOf(C) === (parentName === 'Object' ? w.Function.prototype : parent), name + ' interface inheritance');
+        assert(C.prototype.constructor === C, name + ' prototype constructor');
+        const tag = Object.getOwnPropertyDescriptor(C.prototype, Symbol.toStringTag);
+        assert(tag.value === name && !tag.writable && !tag.enumerable && tag.configurable, name + ' tag');
+        for (const call of [() => C(), () => new C()]) {
+          let error;
+          try { call(); } catch (caught) { error = caught; }
+          assert(error instanceof w.TypeError, name + ' rejects direct construction in the callee realm');
+          if (w !== window) assert(!(error instanceof TypeError), name + ' foreign error realm');
+        }
+      }
+    }
+    return true;
+  }
+})()"#).unwrap(), "true", "{url}");
+    }
+}
diff --git a/moli-renderer-v8/src/script_vm/tests/mod.rs b/moli-renderer-v8/src/script_vm/tests/mod.rs
index c6babb3828..4f36c67b6b 100644
--- a/moli-renderer-v8/src/script_vm/tests/mod.rs
+++ b/moli-renderer-v8/src/script_vm/tests/mod.rs
@@ -2144,6 +2144,7 @@ mod element_click;
 mod event_receivers;
 mod headers_list;
 mod http_fixture;
+mod media_stream_track_interfaces;
 
 mod audio_event_interfaces;
 mod import_meta;
diff --git a/moli-renderer-v8/src/web_api_interfaces.rs b/moli-renderer-v8/src/web_api_interfaces.rs
index 5acca2d265..86de6f2d7c 100644
--- a/moli-renderer-v8/src/web_api_interfaces.rs
+++ b/moli-renderer-v8/src/web_api_interfaces.rs
@@ -289,6 +289,8 @@ interfaces! {
     MediaCapabilities;
     MediaDeviceInfo;
     InputDeviceInfo: MediaDeviceInfo;
+    MediaStreamTrack: EventTarget;
+    CanvasCaptureMediaStreamTrack: MediaStreamTrack;
     MediaDevices: EventTarget;
     MediaError;
     MediaList;