DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (cdf352f02ac4)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
/* -*- 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_idbrequest_h__
#define mozilla_dom_idbrequest_h__

#include "js/RootingAPI.h"
#include "mozilla/Attributes.h"
#include "mozilla/EventForwards.h"
#include "mozilla/dom/IDBRequestBinding.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "nsCycleCollectionParticipant.h"
#include "SafeRefPtr.h"

#define PRIVATE_IDBREQUEST_IID                       \
  {                                                  \
    0xe68901e5, 0x1d50, 0x4ee9, {                    \
      0xaf, 0x49, 0x90, 0x99, 0x4a, 0xff, 0xc8, 0x39 \
    }                                                \
  }

class nsIGlobalObject;

namespace mozilla {

class ErrorResult;

namespace dom {

class DOMException;
class IDBCursor;
class IDBDatabase;
class IDBFactory;
class IDBIndex;
class IDBObjectStore;
class IDBTransaction;
template <typename>
struct Nullable;
class OwningIDBObjectStoreOrIDBIndexOrIDBCursor;
class StrongWorkerRef;

class IDBRequest : public DOMEventTargetHelper {
 protected:
  // mSourceAsObjectStore and mSourceAsIndex are exclusive and one must always
  // be set. mSourceAsCursor is sometimes set also.
  RefPtr<IDBObjectStore> mSourceAsObjectStore;
  RefPtr<IDBIndex> mSourceAsIndex;
  RefPtr<IDBCursor> mSourceAsCursor;

  RefPtr<IDBTransaction> mTransaction;

  JS::Heap<JS::Value> mResultVal;
  RefPtr<DOMException> mError;

  nsString mFilename;
  uint64_t mLoggingSerialNumber;
  nsresult mErrorCode;
  uint32_t mLineNo;
  uint32_t mColumn;
  bool mHaveResultOrErrorCode;

 public:
  class ResultCallback;

  static MOZ_MUST_USE RefPtr<IDBRequest> Create(JSContext* aCx,
                                                IDBDatabase* aDatabase,
                                                IDBTransaction* aTransaction);

  static MOZ_MUST_USE RefPtr<IDBRequest> Create(JSContext* aCx,
                                                IDBObjectStore* aSource,
                                                IDBDatabase* aDatabase,
                                                IDBTransaction* aTransaction);

  static MOZ_MUST_USE RefPtr<IDBRequest> Create(JSContext* aCx,
                                                IDBIndex* aSource,
                                                IDBDatabase* aDatabase,
                                                IDBTransaction* aTransaction);

  static void CaptureCaller(JSContext* aCx, nsAString& aFilename,
                            uint32_t* aLineNo, uint32_t* aColumn);

  static uint64_t NextSerialNumber();

  // EventTarget
  void GetEventTargetParent(EventChainPreVisitor& aVisitor) override;

  void GetSource(
      Nullable<OwningIDBObjectStoreOrIDBIndexOrIDBCursor>& aSource) const;

  void Reset();

  void SetResultCallback(ResultCallback* aCallback);

  void SetError(nsresult aRv);

  nsresult GetErrorCode() const
#ifdef DEBUG
      ;
#else
  {
    return mErrorCode;
  }
#endif

  DOMException* GetErrorAfterResult() const
#ifdef DEBUG
      ;
#else
  {
    return mError;
  }
#endif

  DOMException* GetError(ErrorResult& aRv);

  void GetCallerLocation(nsAString& aFilename, uint32_t* aLineNo,
                         uint32_t* aColumn) const;

  bool IsPending() const { return !mHaveResultOrErrorCode; }

  uint64_t LoggingSerialNumber() const {
    AssertIsOnOwningThread();

    return mLoggingSerialNumber;
  }

  void SetLoggingSerialNumber(uint64_t aLoggingSerialNumber);

  nsIGlobalObject* GetParentObject() const { return GetOwnerGlobal(); }

  void GetResult(JS::MutableHandle<JS::Value> aResult, ErrorResult& aRv) const;

  void GetResult(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
                 ErrorResult& aRv) const {
    GetResult(aResult, aRv);
  }

  IDBTransaction* GetTransaction() const {
    AssertIsOnOwningThread();

    return mTransaction;
  }

  IDBRequestReadyState ReadyState() const;

  void SetSource(IDBCursor* aSource);

  IMPL_EVENT_HANDLER(success);
  IMPL_EVENT_HANDLER(error);

  void AssertIsOnOwningThread() const { NS_ASSERT_OWNINGTHREAD(IDBRequest); }

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(IDBRequest,
                                                         DOMEventTargetHelper)

  // nsWrapperCache
  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;

 protected:
  explicit IDBRequest(IDBDatabase* aDatabase);
  explicit IDBRequest(nsIGlobalObject* aGlobal);
  ~IDBRequest();

  void InitMembers();

  void ConstructResult();
};

class NS_NO_VTABLE IDBRequest::ResultCallback {
 public:
  virtual nsresult GetResult(JSContext* aCx,
                             JS::MutableHandle<JS::Value> aResult) = 0;

 protected:
  ResultCallback() = default;
};

class IDBOpenDBRequest final : public IDBRequest {
  // Only touched on the owning thread.
  SafeRefPtr<IDBFactory> mFactory;

  RefPtr<StrongWorkerRef> mWorkerRef;

  const bool mFileHandleDisabled;
  bool mIncreasedActiveDatabaseCount;

 public:
  static MOZ_MUST_USE RefPtr<IDBOpenDBRequest> Create(
      JSContext* aCx, SafeRefPtr<IDBFactory> aFactory,
      nsIGlobalObject* aGlobal);

  bool IsFileHandleDisabled() const { return mFileHandleDisabled; }

  void SetTransaction(IDBTransaction* aTransaction);

  void DispatchNonTransactionError(nsresult aErrorCode);

  void NoteComplete();

  // EventTarget
  virtual nsresult PostHandleEvent(EventChainPostVisitor& aVisitor) override;

  IMPL_EVENT_HANDLER(blocked);
  IMPL_EVENT_HANDLER(upgradeneeded);

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(IDBOpenDBRequest, IDBRequest)

  // nsWrapperCache
  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;

 private:
  IDBOpenDBRequest(SafeRefPtr<IDBFactory> aFactory, nsIGlobalObject* aGlobal,
                   bool aFileHandleDisabled);

  ~IDBOpenDBRequest();

  void IncreaseActiveDatabaseCount();

  void MaybeDecreaseActiveDatabaseCount();
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_idbrequest_h__