1 files changed, 80 insertions, 0 deletions
diff --git a/dom/bindings/ToJSValue.cpp b/dom/bindings/ToJSValue.cpp
new file mode 100644
index 000000000..d84428fb3
--- /dev/null
+++ b/dom/bindings/ToJSValue.cpp
@@ -0,0 +1,80 @@
+/* -*- 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 "mozilla/dom/ToJSValue.h"
+#include "mozilla/dom/DOMException.h"
+#include "mozilla/dom/Exceptions.h"
+#ifdef SPIDERMONKEY_PROMISE
+#include "mozilla/dom/Promise.h"
+#endif // SPIDERMONKEY_PROMISE
+#include "nsAString.h"
+#include "nsContentUtils.h"
+#include "nsStringBuffer.h"
+#include "xpcpublic.h"
+
+namespace mozilla {
+namespace dom {
+
+bool
+ToJSValue(JSContext* aCx, const nsAString& aArgument,
+          JS::MutableHandle<JS::Value> aValue)
+{
+  // Make sure we're called in a compartment
+  MOZ_ASSERT(JS::CurrentGlobalOrNull(aCx));
+
+// XXXkhuey I'd love to use xpc::NonVoidStringToJsval here, but it requires
+  // a non-const nsAString for silly reasons.
+  nsStringBuffer* sharedBuffer;
+  if (!XPCStringConvert::ReadableToJSVal(aCx, aArgument, &sharedBuffer,
+                                         aValue)) {
+    return false;
+  }
+
+  if (sharedBuffer) {
+    NS_ADDREF(sharedBuffer);
+  }
+
+  return true;
+}
+
+
+bool
+ToJSValue(JSContext* aCx,
+          nsresult aArgument,
+          JS::MutableHandle<JS::Value> aValue)
+{
+  RefPtr<Exception> exception = CreateException(aCx, aArgument);
+  return ToJSValue(aCx, exception, aValue);
+}
+
+bool
+ToJSValue(JSContext* aCx,
+          ErrorResult& aArgument,
+          JS::MutableHandle<JS::Value> aValue)
+{
+  MOZ_ASSERT(aArgument.Failed());
+  MOZ_ASSERT(!aArgument.IsUncatchableException(),
+             "Doesn't make sense to convert uncatchable exception to a JS value!");
+  DebugOnly<bool> throwResult = aArgument.MaybeSetPendingException(aCx);
+  MOZ_ASSERT(throwResult);
+  DebugOnly<bool> getPendingResult = JS_GetPendingException(aCx, aValue);
+  MOZ_ASSERT(getPendingResult);
+  JS_ClearPendingException(aCx);
+  return true;
+}
+
+#ifdef SPIDERMONKEY_PROMISE
+bool
+ToJSValue(JSContext* aCx, Promise& aArgument,
+          JS::MutableHandle<JS::Value> aValue)
+{
+  aValue.setObject(*aArgument.PromiseObj());
+  return true;
+}
+#endif // SPIDERMONKEY_PROMISE
+
+} // namespace dom
+} // namespace mozilla