| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_PROMISE_HANDLER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_PROMISE_HANDLER_H_ |
| |
| #include "third_party/blink/renderer/bindings/core/v8/script_function.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "v8/include/v8.h" |
| |
| namespace blink { |
| |
| // Common subclass for PromiseHandlers. |
| class CORE_EXPORT PromiseHandlerBase : public ScriptFunction { |
| public: |
| explicit PromiseHandlerBase(ScriptState* script_state) |
| : ScriptFunction(script_state) {} |
| |
| // Exposed for use by StreamThenPromise. |
| using ScriptFunction::BindToV8Function; |
| }; |
| |
| // A variant of ScriptFunction that avoids the conversion to and from a |
| // ScriptValue. Use this when the reaction doesn't need to return a value other |
| // than undefined. |
| class CORE_EXPORT PromiseHandler : public PromiseHandlerBase { |
| public: |
| explicit PromiseHandler(ScriptState* script_state); |
| |
| virtual void CallWithLocal(v8::Local<v8::Value>) = 0; |
| |
| private: |
| void CallRaw(const v8::FunctionCallbackInfo<v8::Value>&) final; |
| }; |
| |
| // A variant of PromiseHandler for when the reaction does need to return a |
| // value. |
| class CORE_EXPORT PromiseHandlerWithValue : public PromiseHandlerBase { |
| public: |
| explicit PromiseHandlerWithValue(ScriptState* script_state); |
| |
| virtual v8::Local<v8::Value> CallWithLocal(v8::Local<v8::Value>) = 0; |
| |
| private: |
| void CallRaw(const v8::FunctionCallbackInfo<v8::Value>&) final; |
| }; |
| |
| // A convenience wrapper for promise->Then() for when all paths are |
| // PromiseHandlers. It avoids having to call BindToV8Function() |
| // explicitly. If |on_rejected| is null then behaves like single-argument |
| // Then(). If |on_fulfilled| is null then it behaves like Catch(). |
| v8::Local<v8::Promise> StreamThenPromise( |
| v8::Local<v8::Context>, |
| v8::Local<v8::Promise>, |
| PromiseHandlerBase* on_fulfilled, |
| PromiseHandlerBase* on_rejected = nullptr); |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_PROMISE_HANDLER_H_ |