1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 DOM_STREAMS_TRANSFORMSTREAM_H_
#define DOM_STREAMS_TRANSFORMSTREAM_H_
#include "TransformStreamDefaultController.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/QueuingStrategyBinding.h"
#include "mozilla/dom/TransformerBinding.h"
#include "nsCycleCollectionParticipant.h"
#include "nsWrapperCache.h"
namespace mozilla::dom {
class WritableStream;
class ReadableStream;
class UniqueMessagePortId;
class MessagePort;
class TransformerAlgorithmsWrapper;
class TransformStream final : public nsISupports, public nsWrapperCache {
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(TransformStream)
// https://streams.spec.whatwg.org/#transformstream-set-up
// Intended to be used by interfaces using GenericTransformStream mixin.
MOZ_CAN_RUN_SCRIPT static already_AddRefed<TransformStream> CreateGeneric(
const GlobalObject& aGlobal, TransformerAlgorithmsWrapper& aAlgorithms,
ErrorResult& aRv);
// Internal slot accessors
bool Backpressure() const { return mBackpressure; }
Promise* BackpressureChangePromise() { return mBackpressureChangePromise; }
void SetBackpressure(bool aBackpressure);
MOZ_KNOWN_LIVE TransformStreamDefaultController* Controller() {
return mController;
}
void SetController(TransformStreamDefaultController& aController) {
MOZ_ASSERT(!mController);
mController = &aController;
}
// [Transferable]
// https://html.spec.whatwg.org/multipage/structured-data.html#transfer-steps
MOZ_CAN_RUN_SCRIPT bool Transfer(JSContext* aCx,
UniqueMessagePortId& aPortId1,
UniqueMessagePortId& aPortId2);
// https://html.spec.whatwg.org/multipage/structured-data.html#transfer-receiving-steps
static MOZ_CAN_RUN_SCRIPT bool ReceiveTransfer(
JSContext* aCx, nsIGlobalObject* aGlobal, MessagePort& aPort1,
MessagePort& aPort2, JS::MutableHandle<JSObject*> aReturnObject);
protected:
TransformStream(nsIGlobalObject* aGlobal, ReadableStream* aReadable,
WritableStream* aWritable);
explicit TransformStream(nsIGlobalObject* aGlobal);
~TransformStream();
MOZ_CAN_RUN_SCRIPT void Initialize(
JSContext* aCx, Promise* aStartPromise, double aWritableHighWaterMark,
QueuingStrategySize* aWritableSizeAlgorithm,
double aReadableHighWaterMark,
QueuingStrategySize* aReadableSizeAlgorithm, ErrorResult& aRv);
public:
nsIGlobalObject* GetParentObject() const { return mGlobal; }
JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
// WebIDL methods
// TODO: Mark as MOZ_CAN_RUN_SCRIPT when IDL constructors can be (bug 1749042)
MOZ_CAN_RUN_SCRIPT_BOUNDARY static already_AddRefed<TransformStream>
Constructor(const GlobalObject& aGlobal,
const Optional<JS::Handle<JSObject*>>& aTransformer,
const QueuingStrategy& aWritableStrategy,
const QueuingStrategy& aReadableStrategy, ErrorResult& aRv);
ReadableStream* Readable() const { return mReadable; }
WritableStream* Writable() const { return mWritable; }
private:
nsCOMPtr<nsIGlobalObject> mGlobal;
// Internal slots
// MOZ_KNOWN_LIVE for slots that will never be reassigned
bool mBackpressure = false;
RefPtr<Promise> mBackpressureChangePromise;
RefPtr<TransformStreamDefaultController> mController;
RefPtr<ReadableStream> mReadable;
RefPtr<WritableStream> mWritable;
};
namespace streams_abstract {
MOZ_CAN_RUN_SCRIPT void TransformStreamErrorWritableAndUnblockWrite(
JSContext* aCx, TransformStream* aStream, JS::Handle<JS::Value> aError,
ErrorResult& aRv);
MOZ_CAN_RUN_SCRIPT void TransformStreamError(JSContext* aCx,
TransformStream* aStream,
JS::Handle<JS::Value> aError,
ErrorResult& aRv);
} // namespace streams_abstract
} // namespace mozilla::dom
#endif // DOM_STREAMS_TRANSFORMSTREAM_H_
|
