storage/src/mozStorageAsyncStatementJSHelper.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_storage_mozStorageAsyncStatementJSHelper_h_
   8 #define mozilla_storage_mozStorageAsyncStatementJSHelper_h_
   9
  10 #include "nsIXPCScriptable.h"
  11 #include "nsIXPConnect.h"
  12
  13 class AsyncStatement;
  14
  15 namespace mozilla {
  16 namespace storage {
  17
  18 /**
  19  * A modified version of StatementJSHelper that only exposes the async-specific
  20  * 'params' helper.  We do not expose 'row' or 'step' as they do not apply to
  21  * us.
  22  */
  23 class AsyncStatementJSHelper : public nsIXPCScriptable
  24 {
  25 public:
  26   NS_DECL_ISUPPORTS
  27   NS_DECL_NSIXPCSCRIPTABLE
  28
  29 private:
  30   nsresult getParams(AsyncStatement *, JSContext *, JSObject *, JS::Value *);
  31 };
  32
  33 /**
  34  * Wrapper used to clean up the references JS helpers hold to the statement.
  35  * For cycle-avoidance reasons they do not hold reference-counted references,
  36  * so it is important we do this.
  37  */
  38 class AsyncStatementParamsHolder MOZ_FINAL : public nsIXPConnectJSObjectHolder
  39 {
  40 public:
  41   NS_DECL_ISUPPORTS
  42   NS_DECL_NSIXPCONNECTJSOBJECTHOLDER
  43
  44   explicit AsyncStatementParamsHolder(nsIXPConnectJSObjectHolder* aHolder);
  45
  46 private:
  47   virtual ~AsyncStatementParamsHolder();
  48   nsCOMPtr<nsIXPConnectJSObjectHolder> mHolder;
  49 };
  50
  51 } // namespace storage
  52 } // namespace mozilla
  53
  54 #endif // mozilla_storage_mozStorageAsyncStatementJSHelper_h_