ReadableStreamDefaultController.h [plain text]
#pragma once
#if ENABLE(STREAMS_API)
#include "JSDOMConvertBufferSource.h"
#include "JSReadableStreamDefaultController.h"
#include <JavaScriptCore/JSCJSValue.h>
#include <JavaScriptCore/JSCJSValueInlines.h>
#include <JavaScriptCore/TypedArrays.h>
namespace WebCore {
class ReadableStreamSource;
class ReadableStreamDefaultController {
public:
explicit ReadableStreamDefaultController(JSReadableStreamDefaultController* controller) : m_jsController(controller) { }
static JSC::JSValue invoke(JSC::JSGlobalObject&, JSC::JSObject&, const char*, JSC::JSValue);
bool enqueue(RefPtr<JSC::ArrayBuffer>&&);
void error(const Exception&);
void close() { invoke(globalObject(), jsController(), "close", JSC::jsUndefined()); }
private:
void error(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value) { invoke(lexicalGlobalObject, jsController(), "error", value); }
void enqueue(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value) { invoke(lexicalGlobalObject, jsController(), "enqueue", value); }
JSReadableStreamDefaultController& jsController() const;
JSDOMGlobalObject& globalObject() const;
JSReadableStreamDefaultController* m_jsController { nullptr };
};
inline JSReadableStreamDefaultController& ReadableStreamDefaultController::jsController() const
{
ASSERT(m_jsController);
return *m_jsController;
}
inline JSDOMGlobalObject& ReadableStreamDefaultController::globalObject() const
{
ASSERT(m_jsController);
ASSERT(m_jsController->globalObject());
return *static_cast<JSDOMGlobalObject*>(m_jsController->globalObject());
}
inline bool ReadableStreamDefaultController::enqueue(RefPtr<JSC::ArrayBuffer>&& buffer)
{
auto& globalObject = this->globalObject();
JSC::VM& vm = globalObject.vm();
JSC::JSLockHolder locker(vm);
auto scope = DECLARE_THROW_SCOPE(vm);
JSC::JSGlobalObject& lexicalGlobalObject = globalObject;
if (!buffer) {
error(lexicalGlobalObject, createOutOfMemoryError(&lexicalGlobalObject));
return false;
}
auto length = buffer->byteLength();
auto chunk = JSC::Uint8Array::create(WTFMove(buffer), 0, length);
enqueue(lexicalGlobalObject, toJS(&lexicalGlobalObject, &globalObject, chunk.ptr()));
scope.assertNoException();
return true;
}
inline void ReadableStreamDefaultController::error(const Exception& exception)
{
JSC::JSGlobalObject& lexicalGlobalObject = globalObject();
JSC::JSLockHolder locker(&lexicalGlobalObject);
error(lexicalGlobalObject, createDOMException(&lexicalGlobalObject, exception.code(), exception.message()));
}
}
#endif // ENABLE(STREAMS_API)