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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef ExclusiveStreamReader_h | |
6 #define ExclusiveStreamReader_h | |
7 | |
8 #include "bindings/core/v8/ScriptPromise.h" | |
9 #include "bindings/core/v8/ScriptPromiseProperty.h" | |
10 #include "bindings/core/v8/ScriptValue.h" | |
11 #include "bindings/core/v8/ScriptWrappable.h" | |
12 #include "bindings/core/v8/ToV8.h" | |
13 #include "core/dom/ActiveDOMObject.h" | |
14 #include "core/streams/ReadableStream.h" | |
15 #include "platform/heap/Handle.h" | |
16 | |
17 namespace blink { | |
18 | |
19 class DOMException; | |
20 class ExceptionState; | |
21 class ScriptState; | |
22 | |
23 // ExclusiveStreamReader corresponds to the same-name class in the Streams spec | |
24 // https://streams.spec.whatwg.org/. This class trusts ReadableStream, contrary | |
25 // to the class in the Streams spec, because we only support | |
26 // blink::Readable[Byte]Stream as this reader's customer. | |
27 class ExclusiveStreamReader final : public GarbageCollectedFinalized<ExclusiveSt
reamReader>, public ScriptWrappable, public ActiveDOMObject { | |
28 DEFINE_WRAPPERTYPEINFO(); | |
29 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ExclusiveStreamReader); | |
30 public: | |
31 // The stream must not be locked to any ExclusiveStreamReader when called. | |
32 ExclusiveStreamReader(ReadableStream*); | |
33 | |
34 ScriptPromise closed(ScriptState*); | |
35 bool isActive() const; | |
36 ScriptPromise ready(ScriptState*); | |
37 String state() const; | |
38 ScriptPromise cancel(ScriptState*, ScriptValue reason); | |
39 ScriptValue read(ScriptState*, ExceptionState&); | |
40 void releaseLock(); | |
41 ScriptPromise released(ScriptState*); | |
42 | |
43 bool hasPendingActivity() const override; | |
44 void stop() override; | |
45 | |
46 DECLARE_TRACE(); | |
47 | |
48 private: | |
49 using ReleasedPromise = ScriptPromiseProperty<Member<ExclusiveStreamReader>,
ToV8UndefinedGenerator, ToV8UndefinedGenerator>; | |
50 using ClosedPromise = ScriptPromiseProperty<Member<ExclusiveStreamReader>, T
oV8UndefinedGenerator, RefPtrWillBeMember<DOMException>>; | |
51 using ReadyPromise = ScriptPromiseProperty<Member<ExclusiveStreamReader>, To
V8UndefinedGenerator, ToV8UndefinedGenerator>; | |
52 | |
53 const Member<ReadableStream> m_stream; | |
54 const Member<ReleasedPromise> m_released; | |
55 ReadableStream::State m_stateAfterRelease; | |
56 Member<ClosedPromise> m_closedAfterRelease; | |
57 Member<ReadyPromise> m_readyAfterRelease; | |
58 }; | |
59 | |
60 } // namespace blink | |
61 | |
62 #endif // ExclusiveStreamReader_h | |
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