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// 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.
#include "third_party/blink/renderer/core/streams/stream_promise_resolver.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
namespace blink {
StreamPromiseResolver* StreamPromiseResolver::CreateResolved(
ScriptState* script_state,
v8::Local<v8::Value> value) {
auto* promise = MakeGarbageCollected<StreamPromiseResolver>(script_state);
promise->Resolve(script_state, value);
return promise;
}
StreamPromiseResolver* StreamPromiseResolver::CreateResolvedWithUndefined(
ScriptState* script_state) {
return CreateResolved(script_state,
v8::Undefined(script_state->GetIsolate()));
}
StreamPromiseResolver* StreamPromiseResolver::CreateRejected(
ScriptState* script_state,
v8::Local<v8::Value> reason) {
auto* promise = MakeGarbageCollected<StreamPromiseResolver>(script_state);
promise->Reject(script_state, reason);
return promise;
}
StreamPromiseResolver* StreamPromiseResolver::CreateRejectedAndSilent(
ScriptState* script_state,
v8::Local<v8::Value> reason) {
auto* promise = MakeGarbageCollected<StreamPromiseResolver>(script_state);
promise->MarkAsSilent(script_state->GetIsolate());
promise->Reject(script_state, reason);
return promise;
}
StreamPromiseResolver::StreamPromiseResolver(ScriptState* script_state) {
v8::Local<v8::Promise::Resolver> resolver;
if (v8::Promise::Resolver::New(script_state->GetContext())
.ToLocal(&resolver)) {
resolver_.Set(script_state->GetIsolate(), resolver);
}
}
void StreamPromiseResolver::Resolve(ScriptState* script_state,
v8::Local<v8::Value> value) {
if (resolver_.IsEmpty()) {
return;
}
if (is_settled_) {
return;
}
is_settled_ = true;
v8::Isolate* isolate = script_state->GetIsolate();
v8::MicrotasksScope microtasks_scope(
isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
auto result =
resolver_.NewLocal(isolate)->Resolve(script_state->GetContext(), value);
if (result.IsNothing()) {
DVLOG(3) << "Assuming JS shutdown and ignoring failed Resolve";
}
}
void StreamPromiseResolver::ResolveWithUndefined(ScriptState* script_state) {
Resolve(script_state, v8::Undefined(script_state->GetIsolate()));
}
void StreamPromiseResolver::Reject(ScriptState* script_state,
v8::Local<v8::Value> reason) {
if (resolver_.IsEmpty()) {
return;
}
if (is_settled_) {
return;
}
is_settled_ = true;
v8::Isolate* isolate = script_state->GetIsolate();
v8::MicrotasksScope microtasks_scope(
isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
auto result =
resolver_.NewLocal(isolate)->Reject(script_state->GetContext(), reason);
if (result.IsNothing()) {
DVLOG(3) << "Assuming JS shutdown and ignoring failed Reject";
}
}
ScriptPromise StreamPromiseResolver::GetScriptPromise(
ScriptState* script_state) const {
return ScriptPromise(script_state, V8Promise(script_state->GetIsolate()));
}
v8::Local<v8::Promise> StreamPromiseResolver::V8Promise(
v8::Isolate* isolate) const {
if (resolver_.IsEmpty()) {
return v8::Local<v8::Promise>();
}
return resolver_.NewLocal(isolate)->GetPromise();
}
void StreamPromiseResolver::MarkAsHandled(v8::Isolate* isolate) {
v8::Local<v8::Promise> promise = V8Promise(isolate);
if (promise.IsEmpty()) {
return;
}
promise->MarkAsHandled();
}
void StreamPromiseResolver::MarkAsSilent(v8::Isolate* isolate) {
v8::Local<v8::Promise> promise = V8Promise(isolate);
if (promise.IsEmpty()) {
return;
}
promise->MarkAsSilent();
}
v8::Promise::PromiseState StreamPromiseResolver::State(
v8::Isolate* isolate) const {
v8::Local<v8::Promise> promise = V8Promise(isolate);
if (promise.IsEmpty()) {
return v8::Promise::PromiseState::kPending;
}
return promise->State();
}
void StreamPromiseResolver::Trace(Visitor* visitor) const {
visitor->Trace(resolver_);
}
} // namespace blink
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