зеркало из https://github.com/mozilla/gecko-dev.git
122 строки
3.5 KiB
C++
122 строки
3.5 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_FutureCallback_h
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#define mozilla_dom_FutureCallback_h
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#include "mozilla/dom/Future.h"
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#include "nsCycleCollectionParticipant.h"
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namespace mozilla {
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namespace dom {
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class FutureResolver;
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// This is the base class for any FutureCallback.
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// It's a logical step in the future chain of callbacks.
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class FutureCallback : public nsISupports
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{
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(FutureCallback)
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FutureCallback();
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virtual ~FutureCallback();
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virtual void Call(const Optional<JS::Handle<JS::Value> >& aValue) = 0;
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enum Task {
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Resolve,
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Reject
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};
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// This factory returns a FutureCallback object with refcount of 0.
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static FutureCallback*
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Factory(FutureResolver* aNextResolver, AnyCallback* aCallback,
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Task aTask);
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};
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// WrapperFutureCallback execs a JS Callback with a value, and then the return
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// value is sent to the aNextResolver->resolve() or to aNextResolver->Reject()
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// if the JS Callback throws.
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class WrapperFutureCallback MOZ_FINAL : public FutureCallback
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(WrapperFutureCallback,
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FutureCallback)
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void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
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WrapperFutureCallback(FutureResolver* aNextResolver,
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AnyCallback* aCallback);
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~WrapperFutureCallback();
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private:
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nsRefPtr<FutureResolver> mNextResolver;
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nsRefPtr<AnyCallback> mCallback;
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};
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// SimpleWrapperFutureCallback execs a JS Callback with a value.
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class SimpleWrapperFutureCallback MOZ_FINAL : public FutureCallback
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SimpleWrapperFutureCallback,
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FutureCallback)
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void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
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SimpleWrapperFutureCallback(Future* aFuture,
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AnyCallback* aCallback);
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~SimpleWrapperFutureCallback();
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private:
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nsRefPtr<Future> mFuture;
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nsRefPtr<AnyCallback> mCallback;
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};
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// ResolveFutureCallback calls aResolver->Resolve() with the value received by
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// Call().
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class ResolveFutureCallback MOZ_FINAL : public FutureCallback
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ResolveFutureCallback,
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FutureCallback)
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void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
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ResolveFutureCallback(FutureResolver* aResolver);
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~ResolveFutureCallback();
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private:
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nsRefPtr<FutureResolver> mResolver;
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};
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// RejectFutureCallback calls aResolver->Reject() with the value received by
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// Call().
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class RejectFutureCallback MOZ_FINAL : public FutureCallback
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(RejectFutureCallback,
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FutureCallback)
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void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
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RejectFutureCallback(FutureResolver* aResolver);
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~RejectFutureCallback();
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private:
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nsRefPtr<FutureResolver> mResolver;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_FutureCallback_h
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