gecko-dev/dom/base/DOMException.cpp

456 строки
12 KiB
C++

/* -*- 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/. */
#include "mozilla/dom/DOMException.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/HoldDropJSObjects.h"
#include "mozilla/dom/Exceptions.h"
#include "nsContentUtils.h"
#include "nsCOMPtr.h"
#include "nsIDocument.h"
#include "nsIException.h"
#include "nsMemory.h"
#include "xpcprivate.h"
#include "mozilla/dom/DOMExceptionBinding.h"
#include "mozilla/ErrorResult.h"
using namespace mozilla;
using namespace mozilla::dom;
enum DOM4ErrorTypeCodeMap {
/* DOM4 errors from http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#domexception */
IndexSizeError = DOMException_Binding::INDEX_SIZE_ERR,
HierarchyRequestError = DOMException_Binding::HIERARCHY_REQUEST_ERR,
WrongDocumentError = DOMException_Binding::WRONG_DOCUMENT_ERR,
InvalidCharacterError = DOMException_Binding::INVALID_CHARACTER_ERR,
NoModificationAllowedError = DOMException_Binding::NO_MODIFICATION_ALLOWED_ERR,
NotFoundError = DOMException_Binding::NOT_FOUND_ERR,
NotSupportedError = DOMException_Binding::NOT_SUPPORTED_ERR,
// Can't remove until setNamedItem is removed
InUseAttributeError = DOMException_Binding::INUSE_ATTRIBUTE_ERR,
InvalidStateError = DOMException_Binding::INVALID_STATE_ERR,
SyntaxError = DOMException_Binding::SYNTAX_ERR,
InvalidModificationError = DOMException_Binding::INVALID_MODIFICATION_ERR,
NamespaceError = DOMException_Binding::NAMESPACE_ERR,
InvalidAccessError = DOMException_Binding::INVALID_ACCESS_ERR,
TypeMismatchError = DOMException_Binding::TYPE_MISMATCH_ERR,
SecurityError = DOMException_Binding::SECURITY_ERR,
NetworkError = DOMException_Binding::NETWORK_ERR,
AbortError = DOMException_Binding::ABORT_ERR,
URLMismatchError = DOMException_Binding::URL_MISMATCH_ERR,
QuotaExceededError = DOMException_Binding::QUOTA_EXCEEDED_ERR,
TimeoutError = DOMException_Binding::TIMEOUT_ERR,
InvalidNodeTypeError = DOMException_Binding::INVALID_NODE_TYPE_ERR,
DataCloneError = DOMException_Binding::DATA_CLONE_ERR,
InvalidPointerId = 0,
EncodingError = 0,
/* XXX Should be JavaScript native errors */
TypeError = 0,
RangeError = 0,
/* IndexedDB errors http://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#exceptions */
UnknownError = 0,
ConstraintError = 0,
DataError = 0,
TransactionInactiveError = 0,
ReadOnlyError = 0,
VersionError = 0,
/* File API errors http://dev.w3.org/2006/webapi/FileAPI/#ErrorAndException */
NotReadableError = 0,
/* FileHandle API errors */
FileHandleInactiveError = 0,
/* WebCrypto errors https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#dfn-DataError */
OperationError = 0,
/* Push API errors */
NotAllowedError = 0,
};
#define DOM4_MSG_DEF(name, message, nsresult) {(nsresult), name, #name, message},
#define DOM_MSG_DEF(val, message) {(val), NS_ERROR_GET_CODE(val), #val, message},
static constexpr struct ResultStruct
{
nsresult mNSResult;
uint16_t mCode;
const char* mName;
const char* mMessage;
} sDOMErrorMsgMap[] = {
#include "domerr.msg"
};
#undef DOM4_MSG_DEF
#undef DOM_MSG_DEF
static void
NSResultToNameAndMessage(nsresult aNSResult,
nsCString& aName,
nsCString& aMessage,
uint16_t* aCode)
{
aName.Truncate();
aMessage.Truncate();
*aCode = 0;
for (uint32_t idx = 0; idx < ArrayLength(sDOMErrorMsgMap); idx++) {
if (aNSResult == sDOMErrorMsgMap[idx].mNSResult) {
aName.Rebind(sDOMErrorMsgMap[idx].mName,
strlen(sDOMErrorMsgMap[idx].mName));
aMessage.Rebind(sDOMErrorMsgMap[idx].mMessage,
strlen(sDOMErrorMsgMap[idx].mMessage));
*aCode = sDOMErrorMsgMap[idx].mCode;
return;
}
}
NS_WARNING("Huh, someone is throwing non-DOM errors using the DOM module!");
}
nsresult
NS_GetNameAndMessageForDOMNSResult(nsresult aNSResult, nsACString& aName,
nsACString& aMessage, uint16_t* aCode)
{
nsCString name;
nsCString message;
uint16_t code = 0;
NSResultToNameAndMessage(aNSResult, name, message, &code);
if (!name.IsEmpty() && !message.IsEmpty()) {
aName = name;
aMessage = message;
if (aCode) {
*aCode = code;
}
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
namespace mozilla {
namespace dom {
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Exception)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(Exception)
NS_INTERFACE_MAP_ENTRY(nsIException)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(Exception)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Exception)
NS_IMPL_CYCLE_COLLECTION_CLASS(Exception)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Exception)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLocation)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mData)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(Exception)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mThrownJSVal)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Exception)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mLocation)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mData)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
tmp->mThrownJSVal.setNull();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
Exception::Exception(const nsACString& aMessage,
nsresult aResult,
const nsACString& aName,
nsIStackFrame *aLocation,
nsISupports *aData)
: mMessage(aMessage)
, mResult(aResult)
, mName(aName)
, mData(aData)
, mHoldingJSVal(false)
{
if (aLocation) {
mLocation = aLocation;
} else {
mLocation = GetCurrentJSStack();
// it is legal for there to be no active JS stack, if C++ code
// is operating on a JS-implemented interface pointer without
// having been called in turn by JS. This happens in the JS
// component loader.
}
}
Exception::~Exception()
{
if (mHoldingJSVal) {
MOZ_ASSERT(NS_IsMainThread());
mozilla::DropJSObjects(this);
}
}
bool
Exception::StealJSVal(JS::Value* aVp)
{
MOZ_ASSERT(NS_IsMainThread());
if (mHoldingJSVal) {
*aVp = mThrownJSVal;
mThrownJSVal.setNull();
mozilla::DropJSObjects(this);
mHoldingJSVal = false;
return true;
}
return false;
}
void
Exception::StowJSVal(JS::Value& aVp)
{
MOZ_ASSERT(NS_IsMainThread());
mThrownJSVal = aVp;
if (!mHoldingJSVal) {
mozilla::HoldJSObjects(this);
mHoldingJSVal = true;
}
}
void
Exception::GetName(nsAString& aName)
{
if (!mName.IsEmpty()) {
CopyUTF8toUTF16(mName, aName);
} else {
aName.Truncate();
const char* name = nullptr;
nsXPCException::NameAndFormatForNSResult(mResult, &name, nullptr);
if (name) {
CopyUTF8toUTF16(name, aName);
}
}
}
void
Exception::GetFilename(JSContext* aCx, nsAString& aFilename)
{
if (mLocation) {
mLocation->GetFilename(aCx, aFilename);
return;
}
aFilename.Truncate();
}
void
Exception::ToString(JSContext* aCx, nsACString& _retval)
{
static const char defaultMsg[] = "<no message>";
static const char defaultLocation[] = "<unknown>";
static const char format[] =
"[Exception... \"%s\" nsresult: \"0x%" PRIx32 " (%s)\" location: \"%s\" data: %s]";
nsCString location;
if (mLocation) {
// we need to free this if it does not fail
mLocation->ToString(aCx, location);
}
if (location.IsEmpty()) {
location.Assign(defaultLocation);
}
const char* msg = mMessage.IsEmpty() ? nullptr : mMessage.get();
const char* resultName = mName.IsEmpty() ? nullptr: mName.get();
if (!resultName &&
!nsXPCException::NameAndFormatForNSResult(mResult, &resultName,
(!msg) ? &msg : nullptr)) {
if (!msg) {
msg = defaultMsg;
}
resultName = "<unknown>";
}
const char* data = mData ? "yes" : "no";
_retval.Truncate();
_retval.AppendPrintf(format, msg, static_cast<uint32_t>(mResult), resultName,
location.get(), data);
}
JSObject*
Exception::WrapObject(JSContext* cx, JS::Handle<JSObject*> aGivenProto)
{
return Exception_Binding::Wrap(cx, this, aGivenProto);
}
void
Exception::GetMessageMoz(nsString& retval)
{
CopyUTF8toUTF16(mMessage, retval);
}
uint32_t
Exception::Result() const
{
return (uint32_t)mResult;
}
uint32_t
Exception::LineNumber(JSContext* aCx) const
{
if (mLocation) {
return mLocation->GetLineNumber(aCx);
}
return 0;
}
uint32_t
Exception::ColumnNumber() const
{
return 0;
}
already_AddRefed<nsIStackFrame>
Exception::GetLocation() const
{
nsCOMPtr<nsIStackFrame> location = mLocation;
return location.forget();
}
nsISupports*
Exception::GetData() const
{
return mData;
}
void
Exception::GetStack(JSContext* aCx, nsAString& aStack) const
{
if (mLocation) {
mLocation->GetFormattedStack(aCx, aStack);
}
}
void
Exception::Stringify(JSContext* aCx, nsString& retval)
{
nsCString str;
ToString(aCx, str);
CopyUTF8toUTF16(str, retval);
}
DOMException::DOMException(nsresult aRv, const nsACString& aMessage,
const nsACString& aName, uint16_t aCode)
: Exception(aMessage, aRv, aName, nullptr, nullptr),
mCode(aCode)
{
}
void
DOMException::ToString(JSContext* aCx, nsACString& aReturn)
{
aReturn.Truncate();
static const char defaultMsg[] = "<no message>";
static const char defaultLocation[] = "<unknown>";
static const char defaultName[] = "<unknown>";
static const char format[] =
"[Exception... \"%s\" code: \"%d\" nsresult: \"0x%" PRIx32 " (%s)\" location: \"%s\"]";
nsAutoCString location;
if (location.IsEmpty()) {
location = defaultLocation;
}
const char* msg = !mMessage.IsEmpty() ? mMessage.get() : defaultMsg;
const char* resultName = !mName.IsEmpty() ? mName.get() : defaultName;
aReturn.AppendPrintf(format, msg, mCode, static_cast<uint32_t>(mResult), resultName,
location.get());
}
void
DOMException::GetName(nsString& retval)
{
CopyUTF8toUTF16(mName, retval);
}
already_AddRefed<DOMException>
DOMException::Constructor(GlobalObject& /* unused */,
const nsAString& aMessage,
const Optional<nsAString>& aName,
ErrorResult& aError)
{
nsresult exceptionResult = NS_OK;
uint16_t exceptionCode = 0;
nsCString name(NS_LITERAL_CSTRING("Error"));
if (aName.WasPassed()) {
CopyUTF16toUTF8(aName.Value(), name);
for (uint32_t idx = 0; idx < ArrayLength(sDOMErrorMsgMap); idx++) {
if (name.EqualsASCII(sDOMErrorMsgMap[idx].mName)) {
exceptionResult = sDOMErrorMsgMap[idx].mNSResult;
exceptionCode = sDOMErrorMsgMap[idx].mCode;
break;
}
}
}
RefPtr<DOMException> retval =
new DOMException(exceptionResult,
NS_ConvertUTF16toUTF8(aMessage),
name,
exceptionCode);
return retval.forget();
}
JSObject*
DOMException::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return DOMException_Binding::Wrap(aCx, this, aGivenProto);
}
/* static */already_AddRefed<DOMException>
DOMException::Create(nsresult aRv)
{
nsCString name;
nsCString message;
uint16_t code;
NSResultToNameAndMessage(aRv, name, message, &code);
RefPtr<DOMException> inst =
new DOMException(aRv, message, name, code);
return inst.forget();
}
/* static */already_AddRefed<DOMException>
DOMException::Create(nsresult aRv, const nsACString& aMessage)
{
nsCString name;
nsCString message;
uint16_t code;
NSResultToNameAndMessage(aRv, name, message, &code);
RefPtr<DOMException> inst =
new DOMException(aRv, aMessage, name, code);
return inst.forget();
}
} // namespace dom
} // namespace mozilla