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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_ClonedErrorHolder_h
#define mozilla_dom_ClonedErrorHolder_h
#include "nsISupportsImpl.h"
#include "js/ErrorReport.h"
#include "js/TypeDecls.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/StructuredCloneHolder.h"
#include "mozilla/Attributes.h"
class nsIGlobalObject;
class nsQueryActorChild;
namespace mozilla {
class ErrorResult;
namespace dom {
class ClonedErrorHolder final {
NS_INLINE_DECL_REFCOUNTING(ClonedErrorHolder)
public:
static already_AddRefed<ClonedErrorHolder> Constructor(
const GlobalObject& aGlobal, JS::Handle<JSObject*> aError,
ErrorResult& aRv);
static already_AddRefed<ClonedErrorHolder> Create(
JSContext* aCx, JS::Handle<JSObject*> aError, ErrorResult& aRv);
enum class Type : uint8_t {
Uninitialized,
JSError,
Exception,
DOMException,
Max_,
};
bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
JS::MutableHandle<JSObject*> aReflector);
bool WriteStructuredClone(JSContext* aCx, JSStructuredCloneWriter* aWriter,
StructuredCloneHolder* aHolder);
// Reads the structured clone data for the ClonedErrorHolder and returns the
// wrapped object (either a JS Error or an Exception/DOMException object)
// directly. Never returns an actual ClonedErrorHolder object.
static JSObject* ReadStructuredClone(JSContext* aCx,
JSStructuredCloneReader* aReader,
StructuredCloneHolder* aHolder);
private:
ClonedErrorHolder();
~ClonedErrorHolder() = default;
void Init(JSContext* aCx, JS::Handle<JSObject*> aError, ErrorResult& aRv);
bool Init(JSContext* aCx, JSStructuredCloneReader* aReader);
// Creates a new JS Error or Exception/DOMException object based on the
// values stored in the holder. Returns false and sets an exception on aCx
// if it fails.
bool ToErrorValue(JSContext* aCx, JS::MutableHandle<JS::Value> aResult);
class Holder final : public StructuredCloneHolder {
public:
using StructuredCloneHolder::StructuredCloneHolder;
bool ReadStructuredCloneInternal(JSContext* aCx,
JSStructuredCloneReader* aReader);
};
// Only a subset of the following fields are used, depending on the mType of
// the error stored:
nsCString mName; // Exception, DOMException
nsCString mMessage; // JSError, Exception, DOMException
nsCString mFilename; // JSError only
nsCString mSourceLine; // JSError only
uint32_t mLineNumber = 0; // JSError only
uint32_t mColumn = 0; // JSError only
uint32_t mTokenOffset = 0; // JSError only
uint32_t mErrorNumber = 0; // JSError only
Type mType = Type::Uninitialized;
uint16_t mCode = 0; // DOMException only
JSExnType mExnType = JSExnType(0); // JSError only
nsresult mResult = NS_OK; // Exception, DOMException
// JSError, Exception, DOMException
Holder mStack{Holder::CloningSupported, Holder::TransferringNotSupported,
Holder::StructuredCloneScope::DifferentProcess};
};
} // namespace dom
} // namespace mozilla
#endif // !defined(mozilla_dom_ClonedErrorHolder_h)
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