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// Copyright 2015 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 "core/streams/ReadableStreamOperations.h"
#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/ScriptState.h"
#include "bindings/core/v8/ToV8.h"
#include "bindings/core/v8/V8ScriptRunner.h"
#include "core/streams/UnderlyingSourceBase.h"
namespace blink {
ScriptValue ReadableStreamOperations::createReadableStream(
ScriptState* scriptState,
UnderlyingSourceBase* underlyingSource,
ScriptValue strategy) {
ScriptState::Scope scope(scriptState);
v8::Local<v8::Value> jsUnderlyingSource = ToV8(underlyingSource, scriptState);
v8::Local<v8::Value> jsStrategy = strategy.v8Value();
v8::Local<v8::Value> args[] = {jsUnderlyingSource, jsStrategy};
return ScriptValue(
scriptState,
V8ScriptRunner::callExtraOrCrash(
scriptState, "createReadableStreamWithExternalController", args));
}
ScriptValue ReadableStreamOperations::createCountQueuingStrategy(
ScriptState* scriptState,
size_t highWaterMark) {
ScriptState::Scope scope(scriptState);
v8::Local<v8::Value> args[] = {
v8::Number::New(scriptState->isolate(), highWaterMark)};
return ScriptValue(
scriptState, V8ScriptRunner::callExtraOrCrash(
scriptState, "createBuiltInCountQueuingStrategy", args));
}
ScriptValue ReadableStreamOperations::getReader(ScriptState* scriptState,
ScriptValue stream,
ExceptionState& es) {
ASSERT(isReadableStream(scriptState, stream));
v8::TryCatch block(scriptState->isolate());
v8::Local<v8::Value> args[] = {stream.v8Value()};
ScriptValue result(
scriptState,
V8ScriptRunner::callExtra(scriptState,
"AcquireReadableStreamDefaultReader", args));
if (block.HasCaught())
es.rethrowV8Exception(block.Exception());
return result;
}
bool ReadableStreamOperations::isReadableStream(ScriptState* scriptState,
ScriptValue value) {
ASSERT(!value.isEmpty());
if (!value.isObject())
return false;
v8::Local<v8::Value> args[] = {value.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState, "IsReadableStream", args)
->ToBoolean()
->Value();
}
bool ReadableStreamOperations::isDisturbed(ScriptState* scriptState,
ScriptValue stream) {
ASSERT(isReadableStream(scriptState, stream));
v8::Local<v8::Value> args[] = {stream.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState,
"IsReadableStreamDisturbed", args)
->ToBoolean()
->Value();
}
bool ReadableStreamOperations::isLocked(ScriptState* scriptState,
ScriptValue stream) {
ASSERT(isReadableStream(scriptState, stream));
v8::Local<v8::Value> args[] = {stream.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState, "IsReadableStreamLocked",
args)
->ToBoolean()
->Value();
}
bool ReadableStreamOperations::isReadable(ScriptState* scriptState,
ScriptValue stream) {
ASSERT(isReadableStream(scriptState, stream));
v8::Local<v8::Value> args[] = {stream.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState,
"IsReadableStreamReadable", args)
->ToBoolean()
->Value();
}
bool ReadableStreamOperations::isClosed(ScriptState* scriptState,
ScriptValue stream) {
ASSERT(isReadableStream(scriptState, stream));
v8::Local<v8::Value> args[] = {stream.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState, "IsReadableStreamClosed",
args)
->ToBoolean()
->Value();
}
bool ReadableStreamOperations::isErrored(ScriptState* scriptState,
ScriptValue stream) {
ASSERT(isReadableStream(scriptState, stream));
v8::Local<v8::Value> args[] = {stream.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState,
"IsReadableStreamErrored", args)
->ToBoolean()
->Value();
}
bool ReadableStreamOperations::isReadableStreamDefaultReader(
ScriptState* scriptState,
ScriptValue value) {
ASSERT(!value.isEmpty());
if (!value.isObject())
return false;
v8::Local<v8::Value> args[] = {value.v8Value()};
return V8ScriptRunner::callExtraOrCrash(scriptState,
"IsReadableStreamDefaultReader", args)
->ToBoolean()
->Value();
}
ScriptPromise ReadableStreamOperations::defaultReaderRead(
ScriptState* scriptState,
ScriptValue reader) {
ASSERT(isReadableStreamDefaultReader(scriptState, reader));
v8::Local<v8::Value> args[] = {reader.v8Value()};
return ScriptPromise::cast(
scriptState, V8ScriptRunner::callExtraOrCrash(
scriptState, "ReadableStreamDefaultReaderRead", args));
}
void ReadableStreamOperations::tee(ScriptState* scriptState,
ScriptValue stream,
ScriptValue* newStream1,
ScriptValue* newStream2) {
DCHECK(isReadableStream(scriptState, stream));
DCHECK(!isLocked(scriptState, stream));
v8::Local<v8::Value> args[] = {stream.v8Value()};
ScriptValue result(scriptState, V8ScriptRunner::callExtraOrCrash(
scriptState, "ReadableStreamTee", args));
DCHECK(result.v8Value()->IsArray());
v8::Local<v8::Array> branches = result.v8Value().As<v8::Array>();
DCHECK_EQ(2u, branches->Length());
*newStream1 = ScriptValue(
scriptState, branches->Get(scriptState->context(), 0).ToLocalChecked());
*newStream2 = ScriptValue(
scriptState, branches->Get(scriptState->context(), 1).ToLocalChecked());
DCHECK(isReadableStream(scriptState, *newStream1));
DCHECK(isReadableStream(scriptState, *newStream2));
}
} // namespace blink
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