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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 */
#ifndef mozilla_dom_indexeddb_keypath_h__
#define mozilla_dom_indexeddb_keypath_h__
#include <new>
#include <utility>
#include "js/TypeDecls.h"
#include "mozilla/Result.h"
#include "mozilla/ipc/IPCForwards.h"
#include "nsISupports.h"
#include "nsError.h"
#include "nsString.h"
#include "nsTArray.h"
namespace JS {
template <class T>
class Heap;
namespace mozilla::dom {
class OwningStringOrStringSequence;
template <typename T>
class Sequence;
template <typename T>
struct Nullable;
namespace indexedDB {
class IndexMetadata;
class Key;
class ObjectStoreMetadata;
class KeyPath {
// This private constructor is only to be used by IPDL-generated classes.
friend class IndexMetadata;
friend class ObjectStoreMetadata;
KeyPath() : mType(KeyPathType::NonExistent) { MOZ_COUNT_CTOR(KeyPath); }
using VoidOrObjectStoreKeyPathString = nsAString;
enum class KeyPathType { NonExistent, String, Array, EndGuard };
void SetType(KeyPathType aType);
bool AppendStringWithValidation(const nsAString& aString);
explicit KeyPath(int aDummy) : mType(KeyPathType::NonExistent) {
KeyPath(KeyPath&& aOther) {
*this = std::move(aOther);
KeyPath& operator=(KeyPath&&) = default;
KeyPath(const KeyPath& aOther) {
*this = aOther;
KeyPath& operator=(const KeyPath&) = default;
static Result<KeyPath, nsresult> Parse(const nsAString& aString);
static Result<KeyPath, nsresult> Parse(const Sequence<nsString>& aStrings);
static Result<KeyPath, nsresult> Parse(
const Nullable<OwningStringOrStringSequence>& aValue);
nsresult ExtractKey(
JSContext* aCx, const JS::Value& aValue, Key& aKey,
const VoidOrObjectStoreKeyPathString& aAutoIncrementedObjectStoreKeyPath =
VoidString()) const;
nsresult ExtractKeyAsJSVal(JSContext* aCx, const JS::Value& aValue,
JS::Value* aOutVal) const;
using ExtractOrCreateKeyCallback = nsresult (*)(JSContext*, void*);
nsresult ExtractOrCreateKey(JSContext* aCx, const JS::Value& aValue,
Key& aKey, ExtractOrCreateKeyCallback aCallback,
void* aClosure) const;
inline bool IsValid() const { return mType != KeyPathType::NonExistent; }
inline bool IsArray() const { return mType == KeyPathType::Array; }
inline bool IsString() const { return mType == KeyPathType::String; }
inline bool IsEmpty() const {
return mType == KeyPathType::String && mStrings[0].IsEmpty();
bool operator==(const KeyPath& aOther) const {
return mType == aOther.mType && mStrings == aOther.mStrings;
nsAutoString SerializeToString() const;
static KeyPath DeserializeFromString(const nsAString& aString);
nsresult ToJSVal(JSContext* aCx, JS::MutableHandle<JS::Value> aValue) const;
nsresult ToJSVal(JSContext* aCx, JS::Heap<JS::Value>& aValue) const;
bool IsAllowedForObjectStore(bool aAutoIncrement) const;
KeyPathType mType;
CopyableTArray<nsString> mStrings;
} // namespace indexedDB
} // namespace mozilla::dom
#endif // mozilla_dom_indexeddb_keypath_h__