gecko-dev/dom/promise/PromiseCallback.h
2013-09-11 18:03:04 +02:00

118 lines
3.4 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=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/. */
#ifndef mozilla_dom_PromiseCallback_h
#define mozilla_dom_PromiseCallback_h
#include "mozilla/dom/Promise.h"
#include "nsCycleCollectionParticipant.h"
namespace mozilla {
namespace dom {
// This is the base class for any PromiseCallback.
// It's a logical step in the promise chain of callbacks.
class PromiseCallback : public nsISupports
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS(PromiseCallback)
PromiseCallback();
virtual ~PromiseCallback();
virtual void Call(const Optional<JS::Handle<JS::Value> >& aValue) = 0;
enum Task {
Resolve,
Reject
};
// This factory returns a PromiseCallback object with refcount of 0.
static PromiseCallback*
Factory(Promise* aNextPromise, AnyCallback* aCallback, Task aTask);
};
// WrapperPromiseCallback execs a JS Callback with a value, and then the return
// value is sent to the aNextPromise->resolveFunction() or to
// aNextPromise->RejectFunction() if the JS Callback throws.
class WrapperPromiseCallback MOZ_FINAL : public PromiseCallback
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(WrapperPromiseCallback,
PromiseCallback)
void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
WrapperPromiseCallback(Promise* aNextPromise, AnyCallback* aCallback);
~WrapperPromiseCallback();
private:
nsRefPtr<Promise> mNextPromise;
nsRefPtr<AnyCallback> mCallback;
};
// SimpleWrapperPromiseCallback execs a JS Callback with a value.
class SimpleWrapperPromiseCallback MOZ_FINAL : public PromiseCallback
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SimpleWrapperPromiseCallback,
PromiseCallback)
void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
SimpleWrapperPromiseCallback(Promise* aPromise,
AnyCallback* aCallback);
~SimpleWrapperPromiseCallback();
private:
nsRefPtr<Promise> mPromise;
nsRefPtr<AnyCallback> mCallback;
};
// ResolvePromiseCallback calls aPromise->ResolveFunction() with the value
// received by Call().
class ResolvePromiseCallback MOZ_FINAL : public PromiseCallback
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ResolvePromiseCallback,
PromiseCallback)
void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
ResolvePromiseCallback(Promise* aPromise);
~ResolvePromiseCallback();
private:
nsRefPtr<Promise> mPromise;
};
// RejectPromiseCallback calls aPromise->RejectFunction() with the value
// received by Call().
class RejectPromiseCallback MOZ_FINAL : public PromiseCallback
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(RejectPromiseCallback,
PromiseCallback)
void Call(const Optional<JS::Handle<JS::Value> >& aValue) MOZ_OVERRIDE;
RejectPromiseCallback(Promise* aPromise);
~RejectPromiseCallback();
private:
nsRefPtr<Promise> mPromise;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_PromiseCallback_h