The Tor Browser: dom/bindings/CallbackFunction.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim:set ts=2 sw=2 sts=2 et cindent: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 /**

     8  * A common base class for representing WebIDL callback function types in C++.

     9  *

    10  * This class implements common functionality like lifetime

    11  * management, initialization with the callable, and setup of the call

    12  * environment.  Subclasses corresponding to particular callback

    13  * function types should provide a Call() method that actually does

    14  * the call.

    15  */

    17 #ifndef mozilla_dom_CallbackFunction_h

    18 #define mozilla_dom_CallbackFunction_h

    20 #include "mozilla/dom/CallbackObject.h"

    22 namespace mozilla {

    23 namespace dom {

    25 class CallbackFunction : public CallbackObject

    26 {

    27 public:

    28   explicit CallbackFunction(JS::Handle<JSObject*> aCallable,

    29                             nsIGlobalObject* aIncumbentGlobal)

    30     : CallbackObject(aCallable, aIncumbentGlobal)

    31   {

    32   }

    34   JS::Handle<JSObject*> Callable() const

    35   {

    36     return Callback();

    37   }

    39   bool HasGrayCallable() const

    40   {

    41     // Play it safe in case this gets called after unlink.

    42     return mCallback && xpc_IsGrayGCThing(mCallback);

    43   }

    45 protected:

    46   explicit CallbackFunction(CallbackFunction* aCallbackFunction)

    47     : CallbackObject(aCallbackFunction)

    48   {

    49   }

    50 };

    52 } // namespace dom

    53 } // namespace mozilla

    55 #endif // mozilla_dom_CallbackFunction_h

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