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+/* -*- 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/. */
+
+/**
+ * A common base class for representing WebIDL callback function types in C++.
+ *
+ * This class implements common functionality like lifetime
+ * management, initialization with the callable, and setup of the call
+ * environment. Subclasses corresponding to particular callback
+ * function types should provide a Call() method that actually does
+ * the call.
+ */
+
+#ifndef mozilla_dom_CallbackFunction_h
+#define mozilla_dom_CallbackFunction_h
+
+#include "mozilla/dom/CallbackObject.h"
+
+namespace mozilla {
+namespace dom {
+
+class CallbackFunction : public CallbackObject
+{
+public:
+ // See CallbackObject for an explanation of the arguments.
+ explicit CallbackFunction(JSContext* aCx, JS::Handle<JSObject*> aCallable,
+ nsIGlobalObject* aIncumbentGlobal)
+ : CallbackObject(aCx, aCallable, aIncumbentGlobal)
+ {
+ }
+
+ // See CallbackObject for an explanation of the arguments.
+ explicit CallbackFunction(JS::Handle<JSObject*> aCallable,
+ JS::Handle<JSObject*> aAsyncStack,
+ nsIGlobalObject* aIncumbentGlobal)
+ : CallbackObject(aCallable, aAsyncStack, aIncumbentGlobal)
+ {
+ }
+
+ JS::Handle<JSObject*> Callable() const
+ {
+ return Callback();
+ }
+
+ JS::Handle<JSObject*> CallablePreserveColor() const
+ {
+ return CallbackPreserveColor();
+ }
+
+ bool HasGrayCallable() const
+ {
+ // Play it safe in case this gets called after unlink.
+ return mCallback && JS::ObjectIsMarkedGray(mCallback);
+ }
+
+protected:
+ explicit CallbackFunction(CallbackFunction* aCallbackFunction)
+ : CallbackObject(aCallbackFunction)
+ {
+ }
+
+ // See CallbackObject for an explanation of the arguments.
+ CallbackFunction(JSContext* aCx, JS::Handle<JSObject*> aCallable,
+ nsIGlobalObject* aIncumbentGlobal,
+ const FastCallbackConstructor&)
+ : CallbackObject(aCx, aCallable, aIncumbentGlobal,
+ FastCallbackConstructor())
+ {
+ }
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_CallbackFunction_h