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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_indexeddatabase_h__
#define mozilla_dom_indexeddatabase_h__
#include "DatabaseFileInfoFwd.h"
#include "js/StructuredClone.h"
#include "mozilla/InitializedOnce.h"
#include "mozilla/Variant.h"
#include "nsCOMPtr.h"
#include "nsTArray.h"
#include "SafeRefPtr.h"
namespace mozilla::dom {
class Blob;
class IDBDatabase;
namespace indexedDB {
struct StructuredCloneFileBase {
enum FileType {
eBlob,
eMutableFile,
eStructuredClone,
eWasmBytecode,
eWasmCompiled,
eEndGuard
};
FileType Type() const { return mType; }
protected:
explicit StructuredCloneFileBase(FileType aType) : mType{aType} {}
FileType mType;
};
struct StructuredCloneFileChild : StructuredCloneFileBase {
StructuredCloneFileChild(const StructuredCloneFileChild&) = delete;
StructuredCloneFileChild& operator=(const StructuredCloneFileChild&) = delete;
#ifdef NS_BUILD_REFCNT_LOGGING
// In IndexedDatabaseInlines.h
StructuredCloneFileChild(StructuredCloneFileChild&&);
#else
StructuredCloneFileChild(StructuredCloneFileChild&&) = default;
#endif
StructuredCloneFileChild& operator=(StructuredCloneFileChild&&) = delete;
// In IndexedDatabaseInlines.h
~StructuredCloneFileChild();
// In IndexedDatabaseInlines.h
explicit StructuredCloneFileChild(FileType aType);
// In IndexedDatabaseInlines.h
StructuredCloneFileChild(FileType aType, RefPtr<Blob> aBlob);
const dom::Blob& Blob() const { return *mContents->as<RefPtr<dom::Blob>>(); }
// XXX This is currently used for a number of reasons. Bug 1620560 will remove
// the need for one of them, but the uses of do_GetWeakReference in
// IDBDatabase::GetOrCreateFileActorForBlob and WrapAsJSObject in
// CopyingStructuredCloneReadCallback are probably harder to change.
dom::Blob& MutableBlob() const { return *mContents->as<RefPtr<dom::Blob>>(); }
// In IndexedDatabaseInlines.h
RefPtr<dom::Blob> BlobPtr() const;
bool HasBlob() const { return mContents->is<RefPtr<dom::Blob>>(); }
private:
InitializedOnce<const Variant<Nothing, RefPtr<dom::Blob>>> mContents;
};
struct StructuredCloneFileParent : StructuredCloneFileBase {
StructuredCloneFileParent(const StructuredCloneFileParent&) = delete;
StructuredCloneFileParent& operator=(const StructuredCloneFileParent&) =
delete;
#ifdef NS_BUILD_REFCNT_LOGGING
// In IndexedDatabaseInlines.h
StructuredCloneFileParent(StructuredCloneFileParent&&);
#else
StructuredCloneFileParent(StructuredCloneFileParent&&) = default;
#endif
StructuredCloneFileParent& operator=(StructuredCloneFileParent&&) = delete;
// In IndexedDatabaseInlines.h
StructuredCloneFileParent(FileType aType,
SafeRefPtr<DatabaseFileInfo> aFileInfo);
// In IndexedDatabaseInlines.h
~StructuredCloneFileParent();
// XXX This is used for a schema upgrade hack in UpgradeSchemaFrom19_0To20_0.
// When this is eventually removed, this function can be removed, and mType
// can be declared const in the base class.
void MutateType(FileType aNewType) { mType = aNewType; }
const DatabaseFileInfo& FileInfo() const { return ***mContents; }
// In IndexedDatabaseInlines.h
SafeRefPtr<DatabaseFileInfo> FileInfoPtr() const;
private:
InitializedOnce<const Maybe<SafeRefPtr<DatabaseFileInfo>>> mContents;
};
struct StructuredCloneReadInfoBase {
// In IndexedDatabaseInlines.h
explicit StructuredCloneReadInfoBase(JSStructuredCloneData&& aData)
: mData{std::move(aData)} {}
const JSStructuredCloneData& Data() const { return mData; }
JSStructuredCloneData ReleaseData() { return std::move(mData); }
private:
JSStructuredCloneData mData;
};
template <typename StructuredCloneFileT>
struct StructuredCloneReadInfo : StructuredCloneReadInfoBase {
using StructuredCloneFile = StructuredCloneFileT;
// In IndexedDatabaseInlines.h
explicit StructuredCloneReadInfo(JS::StructuredCloneScope aScope);
// In IndexedDatabaseInlines.h
StructuredCloneReadInfo();
// In IndexedDatabaseInlines.h
StructuredCloneReadInfo(JSStructuredCloneData&& aData,
nsTArray<StructuredCloneFile> aFiles);
#ifdef NS_BUILD_REFCNT_LOGGING
// In IndexedDatabaseInlines.h
~StructuredCloneReadInfo();
// In IndexedDatabaseInlines.h
//
// This custom implementation of the move ctor is only necessary because of
// MOZ_COUNT_CTOR. It is less efficient as the compiler-generated move ctor,
// since it unnecessarily clears elements on the source.
StructuredCloneReadInfo(StructuredCloneReadInfo&& aOther) noexcept;
#else
StructuredCloneReadInfo(StructuredCloneReadInfo&& aOther) = default;
#endif
StructuredCloneReadInfo& operator=(StructuredCloneReadInfo&& aOther) =
default;
StructuredCloneReadInfo(const StructuredCloneReadInfo& aOther) = delete;
StructuredCloneReadInfo& operator=(const StructuredCloneReadInfo& aOther) =
delete;
// In IndexedDatabaseInlines.h
size_t Size() const;
// XXX This is only needed for a schema upgrade (UpgradeSchemaFrom19_0To20_0).
// If support for older schemas is dropped, we can probably remove this method
// and make mFiles InitializedOnce.
StructuredCloneFile& MutableFile(const size_t aIndex) {
return mFiles[aIndex];
}
const nsTArray<StructuredCloneFile>& Files() const { return mFiles; }
nsTArray<StructuredCloneFile> ReleaseFiles() { return std::move(mFiles); }
bool HasFiles() const { return !mFiles.IsEmpty(); }
private:
nsTArray<StructuredCloneFile> mFiles;
};
struct StructuredCloneReadInfoChild
: StructuredCloneReadInfo<StructuredCloneFileChild> {
inline StructuredCloneReadInfoChild(JSStructuredCloneData&& aData,
nsTArray<StructuredCloneFileChild> aFiles,
IDBDatabase* aDatabase);
IDBDatabase* Database() const { return mDatabase; }
private:
IDBDatabase* mDatabase;
};
// This is only defined in the header file to satisfy the clang-plugin static
// analysis, it could be placed in ActorsParent.cpp otherwise.
struct StructuredCloneReadInfoParent
: StructuredCloneReadInfo<StructuredCloneFileParent> {
StructuredCloneReadInfoParent(JSStructuredCloneData&& aData,
nsTArray<StructuredCloneFileParent> aFiles,
bool aHasPreprocessInfo)
: StructuredCloneReadInfo{std::move(aData), std::move(aFiles)},
mHasPreprocessInfo{aHasPreprocessInfo} {}
bool HasPreprocessInfo() const { return mHasPreprocessInfo; }
private:
bool mHasPreprocessInfo;
};
template <typename StructuredCloneReadInfo>
JSObject* CommonStructuredCloneReadCallback(
JSContext* aCx, JSStructuredCloneReader* aReader,
const JS::CloneDataPolicy& aCloneDataPolicy, uint32_t aTag, uint32_t aData,
StructuredCloneReadInfo* aCloneReadInfo, IDBDatabase* aDatabase);
template <typename StructuredCloneReadInfoType>
JSObject* StructuredCloneReadCallback(
JSContext* aCx, JSStructuredCloneReader* aReader,
const JS::CloneDataPolicy& aCloneDataPolicy, uint32_t aTag, uint32_t aData,
void* aClosure);
} // namespace indexedDB
} // namespace mozilla::dom
MOZ_DECLARE_RELOCATE_USING_MOVE_CONSTRUCTOR(
mozilla::dom::indexedDB::StructuredCloneReadInfo<
mozilla::dom::indexedDB::StructuredCloneFileChild>);
MOZ_DECLARE_RELOCATE_USING_MOVE_CONSTRUCTOR(
mozilla::dom::indexedDB::StructuredCloneReadInfo<
mozilla::dom::indexedDB::StructuredCloneFileParent>);
MOZ_DECLARE_RELOCATE_USING_MOVE_CONSTRUCTOR(
mozilla::dom::indexedDB::StructuredCloneReadInfoChild);
MOZ_DECLARE_RELOCATE_USING_MOVE_CONSTRUCTOR(
mozilla::dom::indexedDB::StructuredCloneReadInfoParent);
#endif // mozilla_dom_indexeddatabase_h__
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