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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_idbcursortype_h__
#define mozilla_dom_idbcursortype_h__
#include "IndexedDatabase.h"
#include "mozilla/dom/indexedDB/Key.h"
namespace mozilla::dom {
namespace indexedDB {
class ObjectStoreCursorResponse;
class ObjectStoreKeyCursorResponse;
class IndexCursorResponse;
class IndexKeyCursorResponse;
} // namespace indexedDB
enum struct IDBCursorType {
ObjectStore,
ObjectStoreKey,
Index,
IndexKey,
};
template <IDBCursorType CursorType>
struct CursorTypeTraits;
class IDBIndex;
class IDBObjectStore;
class IDBIndexCursor;
class IDBIndexKeyCursor;
class IDBObjectStoreCursor;
class IDBObjectStoreKeyCursor;
template <>
struct CursorTypeTraits<IDBCursorType::Index> {
using Type = IDBIndexCursor;
using ResponseType = indexedDB::IndexCursorResponse;
static constexpr bool IsObjectStoreCursor = false;
static constexpr bool IsKeyOnlyCursor = false;
};
template <>
struct CursorTypeTraits<IDBCursorType::IndexKey> {
using Type = IDBIndexKeyCursor;
using ResponseType = indexedDB::IndexKeyCursorResponse;
static constexpr bool IsObjectStoreCursor = false;
static constexpr bool IsKeyOnlyCursor = true;
};
template <>
struct CursorTypeTraits<IDBCursorType::ObjectStore> {
using Type = IDBObjectStoreCursor;
using ResponseType = indexedDB::ObjectStoreCursorResponse;
static constexpr bool IsObjectStoreCursor = true;
static constexpr bool IsKeyOnlyCursor = false;
};
template <>
struct CursorTypeTraits<IDBCursorType::ObjectStoreKey> {
using Type = IDBObjectStoreKeyCursor;
using ResponseType = indexedDB::ObjectStoreKeyCursorResponse;
static constexpr bool IsObjectStoreCursor = true;
static constexpr bool IsKeyOnlyCursor = true;
};
template <IDBCursorType CursorType>
using CursorSourceType =
std::conditional_t<CursorTypeTraits<CursorType>::IsObjectStoreCursor,
IDBObjectStore, IDBIndex>;
using Key = indexedDB::Key;
using StructuredCloneReadInfoChild = indexedDB::StructuredCloneReadInfoChild;
struct CommonCursorDataBase {
CommonCursorDataBase() = delete;
explicit CommonCursorDataBase(Key aKey);
Key mKey; ///< The current key, i.e. the key representing the cursor's
///< position
///< (https://w3c.github.io/IndexedDB/#cursor-position).
};
template <IDBCursorType CursorType>
struct CursorData;
struct ObjectStoreCursorDataBase : CommonCursorDataBase {
using CommonCursorDataBase::CommonCursorDataBase;
const Key& GetSortKey(const bool aIsLocaleAware) const {
MOZ_ASSERT(!aIsLocaleAware);
return GetObjectStoreKey();
}
const Key& GetObjectStoreKey() const { return mKey; }
static constexpr const char* GetObjectStoreKeyForLogging() { return "NA"; }
};
struct IndexCursorDataBase : CommonCursorDataBase {
IndexCursorDataBase(Key aKey, Key aLocaleAwareKey, Key aObjectStoreKey);
const Key& GetSortKey(const bool aIsLocaleAware) const {
return aIsLocaleAware ? mLocaleAwareKey : mKey;
}
const Key& GetObjectStoreKey() const { return mObjectStoreKey; }
const char* GetObjectStoreKeyForLogging() const {
return GetObjectStoreKey().GetBuffer().get();
}
Key mLocaleAwareKey; ///< If the index's mLocale is set, this is mKey
///< converted to mLocale. Otherwise, it is unset.
Key mObjectStoreKey; ///< The key representing the cursor's object store
///< position
///< (https://w3c.github.io/IndexedDB/#cursor-object-store-position).
};
struct ValueCursorDataBase {
explicit ValueCursorDataBase(StructuredCloneReadInfoChild&& aCloneInfo);
StructuredCloneReadInfoChild mCloneInfo;
};
template <>
struct CursorData<IDBCursorType::ObjectStoreKey> : ObjectStoreCursorDataBase {
using ObjectStoreCursorDataBase::ObjectStoreCursorDataBase;
};
template <>
struct CursorData<IDBCursorType::ObjectStore> : ObjectStoreCursorDataBase,
ValueCursorDataBase {
CursorData(Key aKey, StructuredCloneReadInfoChild&& aCloneInfo);
};
template <>
struct CursorData<IDBCursorType::IndexKey> : IndexCursorDataBase {
using IndexCursorDataBase::IndexCursorDataBase;
};
template <>
struct CursorData<IDBCursorType::Index> : IndexCursorDataBase,
ValueCursorDataBase {
CursorData(Key aKey, Key aLocaleAwareKey, Key aObjectStoreKey,
StructuredCloneReadInfoChild&& aCloneInfo);
};
} // namespace mozilla::dom
#endif
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