1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/bindings/CallbackFunction.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,55 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/**
1.11 + * A common base class for representing WebIDL callback function types in C++.
1.12 + *
1.13 + * This class implements common functionality like lifetime
1.14 + * management, initialization with the callable, and setup of the call
1.15 + * environment. Subclasses corresponding to particular callback
1.16 + * function types should provide a Call() method that actually does
1.17 + * the call.
1.18 + */
1.19 +
1.20 +#ifndef mozilla_dom_CallbackFunction_h
1.21 +#define mozilla_dom_CallbackFunction_h
1.22 +
1.23 +#include "mozilla/dom/CallbackObject.h"
1.24 +
1.25 +namespace mozilla {
1.26 +namespace dom {
1.27 +
1.28 +class CallbackFunction : public CallbackObject
1.29 +{
1.30 +public:
1.31 + explicit CallbackFunction(JS::Handle<JSObject*> aCallable,
1.32 + nsIGlobalObject* aIncumbentGlobal)
1.33 + : CallbackObject(aCallable, aIncumbentGlobal)
1.34 + {
1.35 + }
1.36 +
1.37 + JS::Handle<JSObject*> Callable() const
1.38 + {
1.39 + return Callback();
1.40 + }
1.41 +
1.42 + bool HasGrayCallable() const
1.43 + {
1.44 + // Play it safe in case this gets called after unlink.
1.45 + return mCallback && xpc_IsGrayGCThing(mCallback);
1.46 + }
1.47 +
1.48 +protected:
1.49 + explicit CallbackFunction(CallbackFunction* aCallbackFunction)
1.50 + : CallbackObject(aCallbackFunction)
1.51 + {
1.52 + }
1.53 +};
1.54 +
1.55 +} // namespace dom
1.56 +} // namespace mozilla
1.57 +
1.58 +#endif // mozilla_dom_CallbackFunction_h
