forked from mirrors/gecko-dev
162 lines
4 KiB
C++
162 lines
4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsStructuredCloneContainer.h"
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#include <cstddef>
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#include <utility>
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#include "ErrorList.h"
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#include "js/RootingAPI.h"
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#include "js/StructuredClone.h"
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#include "js/Value.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Base64.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/fallible.h"
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#include "nsCOMPtr.h"
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#include "nsDebug.h"
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#include "nsError.h"
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#include "nsIVariant.h"
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#include "nsIXPConnect.h"
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#include "nsString.h"
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#include "nscore.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_ADDREF(nsStructuredCloneContainer)
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NS_IMPL_RELEASE(nsStructuredCloneContainer)
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NS_INTERFACE_MAP_BEGIN(nsStructuredCloneContainer)
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NS_INTERFACE_MAP_ENTRY(nsIStructuredCloneContainer)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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nsStructuredCloneContainer::nsStructuredCloneContainer() : mVersion(0) {}
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nsStructuredCloneContainer::nsStructuredCloneContainer(uint32_t aVersion)
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: mVersion(aVersion) {}
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nsStructuredCloneContainer::~nsStructuredCloneContainer() = default;
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NS_IMETHODIMP
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nsStructuredCloneContainer::InitFromJSVal(JS::Handle<JS::Value> aData,
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JSContext* aCx) {
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if (DataLength()) {
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return NS_ERROR_FAILURE;
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}
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ErrorResult rv;
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Write(aCx, aData, rv);
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if (NS_WARN_IF(rv.Failed())) {
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// XXX propagate the error message as well.
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// We cannot StealNSResult because we threw a DOM exception.
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rv.SuppressException();
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return NS_ERROR_DOM_DATA_CLONE_ERR;
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}
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mVersion = JS_STRUCTURED_CLONE_VERSION;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStructuredCloneContainer::InitFromBase64(const nsAString& aData,
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uint32_t aFormatVersion) {
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if (DataLength()) {
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return NS_ERROR_FAILURE;
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}
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NS_ConvertUTF16toUTF8 data(aData);
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nsAutoCString binaryData;
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nsresult rv = Base64Decode(data, binaryData);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!CopyExternalData(binaryData.get(), binaryData.Length())) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mVersion = aFormatVersion;
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return NS_OK;
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}
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nsresult nsStructuredCloneContainer::DeserializeToJsval(
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JSContext* aCx, JS::MutableHandle<JS::Value> aValue) {
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aValue.setNull();
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JS::Rooted<JS::Value> jsStateObj(aCx);
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ErrorResult rv;
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Read(aCx, &jsStateObj, rv);
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if (NS_WARN_IF(rv.Failed())) {
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// XXX propagate the error message as well.
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// We cannot StealNSResult because we threw a DOM exception.
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rv.SuppressException();
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return NS_ERROR_DOM_DATA_CLONE_ERR;
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}
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aValue.set(jsStateObj);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStructuredCloneContainer::GetDataAsBase64(nsAString& aOut) {
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aOut.Truncate();
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if (!DataLength()) {
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return NS_ERROR_FAILURE;
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}
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if (HasClonedDOMObjects()) {
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return NS_ERROR_FAILURE;
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}
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auto iter = Data().Start();
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size_t size = Data().Size();
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CheckedInt<nsAutoCString::size_type> sizeCheck(size);
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if (!sizeCheck.isValid()) {
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return NS_ERROR_FAILURE;
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}
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nsAutoCString binaryData;
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if (!binaryData.SetLength(size, fallible)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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DebugOnly<bool> res = Data().ReadBytes(iter, binaryData.BeginWriting(), size);
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MOZ_ASSERT(res);
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nsresult rv = Base64Encode(binaryData, aOut);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStructuredCloneContainer::GetSerializedNBytes(uint64_t* aSize) {
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NS_ENSURE_ARG_POINTER(aSize);
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if (!DataLength()) {
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return NS_ERROR_FAILURE;
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}
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*aSize = DataLength();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStructuredCloneContainer::GetFormatVersion(uint32_t* aFormatVersion) {
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NS_ENSURE_ARG_POINTER(aFormatVersion);
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if (!DataLength()) {
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return NS_ERROR_FAILURE;
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}
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*aFormatVersion = mVersion;
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return NS_OK;
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}
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