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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_DOMException_h__
#define mozilla_dom_DOMException_h__
// We intentionally shadow non-virtual methods, but gcc gets confused.
#ifdef __GNUC__
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Woverloaded-virtual"
#endif
#include <stdint.h>
#include "js/Value.h"
#include "jspubtd.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsID.h"
#include "nsWrapperCache.h"
#include "nsIException.h"
#include "nsString.h"
#include "mozilla/dom/BindingDeclarations.h"
class nsIGlobalObject;
class nsIStackFrame;
nsresult NS_GetNameAndMessageForDOMNSResult(nsresult aNSResult,
nsACString& aName,
nsACString& aMessage,
uint16_t* aCode = nullptr);
namespace mozilla {
class ErrorResult;
namespace dom {
class GlobalObject;
#define MOZILLA_EXCEPTION_IID \
{ \
0x55eda557, 0xeba0, 0x4fe3, { \
0xae, 0x2e, 0xf3, 0x94, 0x49, 0x23, 0x62, 0xd6 \
} \
}
class Exception : public nsIException, public nsWrapperCache {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(MOZILLA_EXCEPTION_IID)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Exception)
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIEXCEPTION
const nsCString& GetMessageMoz() const { return mMessage; }
nsresult GetResult() const { return mResult; }
// DOMException wants different ToString behavior, so allow it to override.
virtual void ToString(JSContext* aCx, nsACString& aReturn);
// Cruft used by XPConnect for exceptions originating in JS implemented
// components.
bool StealJSVal(JS::Value* aVp);
void StowJSVal(JS::Value& aVp);
// WebIDL API
virtual JSObject* WrapObject(JSContext* cx,
JS::Handle<JSObject*> aGivenProto) override;
nsISupports* GetParentObject() const { return nullptr; }
void GetMessageMoz(nsString& retval);
uint32_t Result() const;
void GetName(nsAString& retval);
virtual void GetErrorMessage(nsAString& aRetVal) {
// Since GetName is non non-virtual and deals with different
// member variables in Exception vs. DOMException, have a virtual
// method to ensure the right error message creation.
nsAutoString name;
GetName(name);
CreateErrorMessage(name, aRetVal);
}
void GetFilename(JSContext* aCx, nsAString& aFilename);
uint32_t SourceId(JSContext* aCx) const;
uint32_t LineNumber(JSContext* aCx) const;
uint32_t ColumnNumber() const;
already_AddRefed<nsIStackFrame> GetLocation() const;
nsISupports* GetData() const;
void GetStack(JSContext* aCx, nsAString& aStack) const;
void Stringify(JSContext* aCx, nsString& retval);
Exception(const nsACString& aMessage, nsresult aResult,
const nsACString& aName, nsIStackFrame* aLocation,
nsISupports* aData);
Exception(nsCString&& aMessage, nsresult aResult, nsCString&& aName);
protected:
virtual ~Exception();
void CreateErrorMessage(const nsAString& aName, nsAString& aRetVal) {
// Create similar error message as what ErrorReport::init does in jsexn.cpp.
if (!aName.IsEmpty() && !mMessage.IsEmpty()) {
aRetVal.Assign(aName);
aRetVal.AppendLiteral(": ");
AppendUTF8toUTF16(mMessage, aRetVal);
} else if (!aName.IsEmpty()) {
aRetVal.Assign(aName);
} else if (!mMessage.IsEmpty()) {
CopyUTF8toUTF16(mMessage, aRetVal);
} else {
aRetVal.Truncate();
}
}
nsCString mMessage;
nsresult mResult;
nsCString mName;
nsCOMPtr<nsIStackFrame> mLocation;
nsCOMPtr<nsISupports> mData;
bool mHoldingJSVal;
JS::Heap<JS::Value> mThrownJSVal;
};
NS_DEFINE_STATIC_IID_ACCESSOR(Exception, MOZILLA_EXCEPTION_IID)
class DOMException : public Exception {
public:
DOMException(nsresult aRv, const nsACString& aMessage,
const nsACString& aName, uint16_t aCode,
nsIStackFrame* aLocation = nullptr);
DOMException(nsresult aRv, nsCString&& aMessage, nsCString&& aName,
uint16_t aCode);
NS_INLINE_DECL_REFCOUNTING_INHERITED(DOMException, Exception)
// nsWrapperCache overrides
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
static already_AddRefed<DOMException> Constructor(
GlobalObject& /* unused */, const nsAString& aMessage,
const Optional<nsAString>& aName);
uint16_t Code() const { return mCode; }
// Intentionally shadow the Exception version.
void GetName(nsString& retval);
// Exception overrides
void ToString(JSContext* aCx, nsACString& aReturn) override;
virtual void GetErrorMessage(nsAString& aRetVal) override {
// See the comment in Exception::GetErrorMessage.
nsAutoString name;
GetName(name);
CreateErrorMessage(name, aRetVal);
}
static already_AddRefed<DOMException> Create(nsresult aRv);
static already_AddRefed<DOMException> Create(nsresult aRv,
const nsACString& aMessage);
static already_AddRefed<DOMException> ReadStructuredClone(
JSContext* aCx, nsIGlobalObject* aGlobal,
JSStructuredCloneReader* aReader);
bool WriteStructuredClone(JSContext* aCx,
JSStructuredCloneWriter* aWriter) const;
protected:
virtual ~DOMException() = default;
uint16_t mCode;
};
} // namespace dom
} // namespace mozilla
#ifdef __GNUC__
# pragma GCC diagnostic pop
#endif
#endif
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