1 files changed, 67 insertions, 0 deletions
diff --git a/dom/workers/ChromeWorkerScope.cpp b/dom/workers/ChromeWorkerScope.cpp
new file mode 100644
index 0000000000..e2ec334016
--- /dev/null
+++ b/dom/workers/ChromeWorkerScope.cpp
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ChromeWorkerScope.h"
+
+#include "jsapi.h"
+#include "js/PropertyAndElement.h"  // JS_GetProperty
+#include "js/experimental/CTypes.h"  // JS::InitCTypesClass, JS::CTypesCallbacks, JS::SetCTypesCallbacks
+#include "js/MemoryFunctions.h"
+
+#include "nsNativeCharsetUtils.h"
+#include "nsString.h"
+
+namespace mozilla::dom {
+
+namespace {
+
+#ifdef BUILD_CTYPES
+
+char* UnicodeToNative(JSContext* aCx, const char16_t* aSource,
+                      size_t aSourceLen) {
+  nsDependentSubstring unicode(aSource, aSourceLen);
+
+  nsAutoCString native;
+  if (NS_FAILED(NS_CopyUnicodeToNative(unicode, native))) {
+    JS_ReportErrorASCII(aCx, "Could not convert string to native charset!");
+    return nullptr;
+  }
+
+  char* result = static_cast<char*>(JS_malloc(aCx, native.Length() + 1));
+  if (!result) {
+    return nullptr;
+  }
+
+  memcpy(result, native.get(), native.Length());
+  result[native.Length()] = 0;
+  return result;
+}
+
+#endif  // BUILD_CTYPES
+
+}  // namespace
+
+bool DefineChromeWorkerFunctions(JSContext* aCx,
+                                 JS::Handle<JSObject*> aGlobal) {
+  // Currently ctypes is the only special property given to ChromeWorkers.
+#ifdef BUILD_CTYPES
+  {
+    JS::Rooted<JS::Value> ctypes(aCx);
+    if (!JS::InitCTypesClass(aCx, aGlobal) ||
+        !JS_GetProperty(aCx, aGlobal, "ctypes", &ctypes)) {
+      return false;
+    }
+
+    static const JS::CTypesCallbacks callbacks = {UnicodeToNative};
+
+    JS::SetCTypesCallbacks(ctypes.toObjectOrNull(), &callbacks);
+  }
+#endif  // BUILD_CTYPES
+
+  return true;
+}
+
+}  // namespace mozilla::dom