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dom/promise/PromiseCallback.h@925c144e1f1f (annotated)

dom/promise/PromiseCallback.h

Fri, 16 Jan 2015 18:13:44 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Fri, 16 Jan 2015 18:13:44 +0100

branch

TOR_BUG_9701

changeset 14

925c144e1f1f

permissions

-rw-r--r--

Integrate suggestion from review to improve consistency with existing code.

michael@0	1	/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
michael@0	2	/* vim: set ts=2 et sw=2 tw=80: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0	5	* You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#ifndef mozilla_dom_PromiseCallback_h
michael@0	8	#define mozilla_dom_PromiseCallback_h
michael@0	9
michael@0	10	#include "mozilla/dom/Promise.h"
michael@0	11	#include "nsCycleCollectionParticipant.h"
michael@0	12
michael@0	13	namespace mozilla {
michael@0	14	namespace dom {
michael@0	15
michael@0	16	// This is the base class for any PromiseCallback.
michael@0	17	// It's a logical step in the promise chain of callbacks.
michael@0	18	class PromiseCallback : public nsISupports
michael@0	19	{
michael@0	20	public:
michael@0	21	NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0	22	NS_DECL_CYCLE_COLLECTION_CLASS(PromiseCallback)
michael@0	23
michael@0	24	PromiseCallback();
michael@0	25	virtual ~PromiseCallback();
michael@0	26
michael@0	27	virtual void Call(JS::Handle<JS::Value> aValue) = 0;
michael@0	28
michael@0	29	enum Task {
michael@0	30	Resolve,
michael@0	31	Reject
michael@0	32	};
michael@0	33
michael@0	34	// This factory returns a PromiseCallback object with refcount of 0.
michael@0	35	static PromiseCallback*
michael@0	36	Factory(Promise* aNextPromise, JS::Handle<JSObject*> aObject,
michael@0	37	AnyCallback* aCallback, Task aTask);
michael@0	38	};
michael@0	39
michael@0	40	// WrapperPromiseCallback execs a JS Callback with a value, and then the return
michael@0	41	// value is sent to the aNextPromise->ResolveFunction() or to
michael@0	42	// aNextPromise->RejectFunction() if the JS Callback throws.
michael@0	43	class WrapperPromiseCallback MOZ_FINAL : public PromiseCallback
michael@0	44	{
michael@0	45	public:
michael@0	46	NS_DECL_ISUPPORTS_INHERITED
michael@0	47	NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(WrapperPromiseCallback,
michael@0	48	PromiseCallback)
michael@0	49
michael@0	50	void Call(JS::Handle<JS::Value> aValue) MOZ_OVERRIDE;
michael@0	51
michael@0	52	WrapperPromiseCallback(Promise* aNextPromise, JS::Handle<JSObject*> aGlobal,
michael@0	53	AnyCallback* aCallback);
michael@0	54	~WrapperPromiseCallback();
michael@0	55
michael@0	56	private:
michael@0	57	nsRefPtr<Promise> mNextPromise;
michael@0	58	JS::Heap<JSObject*> mGlobal;
michael@0	59	nsRefPtr<AnyCallback> mCallback;
michael@0	60	};
michael@0	61
michael@0	62	// ResolvePromiseCallback calls aPromise->ResolveFunction() with the value
michael@0	63	// received by Call().
michael@0	64	class ResolvePromiseCallback MOZ_FINAL : public PromiseCallback
michael@0	65	{
michael@0	66	public:
michael@0	67	NS_DECL_ISUPPORTS_INHERITED
michael@0	68	NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(ResolvePromiseCallback,
michael@0	69	PromiseCallback)
michael@0	70
michael@0	71	void Call(JS::Handle<JS::Value> aValue) MOZ_OVERRIDE;
michael@0	72
michael@0	73	ResolvePromiseCallback(Promise* aPromise, JS::Handle<JSObject*> aGlobal);
michael@0	74	~ResolvePromiseCallback();
michael@0	75
michael@0	76	private:
michael@0	77	nsRefPtr<Promise> mPromise;
michael@0	78	JS::Heap<JSObject*> mGlobal;
michael@0	79	};
michael@0	80
michael@0	81	// RejectPromiseCallback calls aPromise->RejectFunction() with the value
michael@0	82	// received by Call().
michael@0	83	class RejectPromiseCallback MOZ_FINAL : public PromiseCallback
michael@0	84	{
michael@0	85	public:
michael@0	86	NS_DECL_ISUPPORTS_INHERITED
michael@0	87	NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(RejectPromiseCallback,
michael@0	88	PromiseCallback)
michael@0	89
michael@0	90	void Call(JS::Handle<JS::Value> aValue) MOZ_OVERRIDE;
michael@0	91
michael@0	92	RejectPromiseCallback(Promise* aPromise, JS::Handle<JSObject*> aGlobal);
michael@0	93	~RejectPromiseCallback();
michael@0	94
michael@0	95	private:
michael@0	96	nsRefPtr<Promise> mPromise;
michael@0	97	JS::Heap<JSObject*> mGlobal;
michael@0	98	};
michael@0	99
michael@0	100	// NativePromiseCallback wraps a NativePromiseHandler.
michael@0	101	class NativePromiseCallback MOZ_FINAL : public PromiseCallback
michael@0	102	{
michael@0	103	public:
michael@0	104	NS_DECL_ISUPPORTS_INHERITED
michael@0	105	NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(NativePromiseCallback,
michael@0	106	PromiseCallback)
michael@0	107
michael@0	108	void Call(JS::Handle<JS::Value> aValue) MOZ_OVERRIDE;
michael@0	109
michael@0	110	NativePromiseCallback(PromiseNativeHandler* aHandler,
michael@0	111	Promise::PromiseState aState);
michael@0	112	~NativePromiseCallback();
michael@0	113
michael@0	114	private:
michael@0	115	nsRefPtr<PromiseNativeHandler> mHandler;
michael@0	116	Promise::PromiseState mState;
michael@0	117	};
michael@0	118
michael@0	119	} // namespace dom
michael@0	120	} // namespace mozilla
michael@0	121
michael@0	122	#endif // mozilla_dom_PromiseCallback_h