dom/ipc/MMPrinter.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   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 MMPrinter_h
   8 #define MMPrinter_h
   9
  10 #include "mozilla/Maybe.h"
  11 #include "mozilla/dom/DOMTypes.h"
  12 #include "nsString.h"
  13
  14 namespace mozilla::dom {
  15
  16 class MMPrinter {
  17  public:
  18   static void Print(char const* aLocation, const nsAString& aMsg,
  19                     ClonedMessageData const& aData) {
  20     if (MOZ_UNLIKELY(MOZ_LOG_TEST(MMPrinter::sMMLog, LogLevel::Debug))) {
  21       Maybe<uint64_t> msgId = MMPrinter::PrintHeader(aLocation, aMsg);
  22       if (!msgId.isSome()) {
  23         return;
  24       }
  25       MMPrinter::PrintData(*msgId, aData);
  26     }
  27   }
  28
  29   static void Print(char const* aLocation, const nsACString& aActorName,
  30                     const nsAString& aMessageName,
  31                     const Maybe<ClonedMessageData>& aData) {
  32     if (MOZ_UNLIKELY(MOZ_LOG_TEST(MMPrinter::sMMLog, LogLevel::Debug))) {
  33       Maybe<uint64_t> msgId = MMPrinter::PrintHeader(
  34           aLocation,
  35           NS_ConvertUTF8toUTF16(aActorName + " - "_ns) + aMessageName);
  36
  37       if (!msgId.isSome()) {
  38         return;
  39       }
  40
  41       if (aData.isSome()) {
  42         MMPrinter::PrintData(*msgId, *aData);
  43       } else {
  44         MMPrinter::PrintNoData(*msgId);
  45       }
  46     }
  47   }
  48
  49  private:
  50   static LazyLogModule sMMLog;
  51   static Maybe<uint64_t> PrintHeader(char const* aLocation,
  52                                      const nsAString& aMsg);
  53   static void PrintNoData(uint64_t aMsgId);
  54   static void PrintData(uint64_t aMsgId, ClonedMessageData const& aData);
  55 };
  56
  57 }  // namespace mozilla::dom
  58
  59 #endif /* MMPrinter_h */