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CustomDefaultLogger.cpp
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2017-2018 CERN for the benefit of the Acts project
4 //
5 // This Source Code Form is subject to the terms of the Mozilla Public
6 // License, v. 2.0. If a copy of the MPL was not distributed with this
7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 
9 #include <algorithm>
10 
12 
13 namespace Acts {
14 
15 namespace Logging {
16 
20 class MirrorOutputDecorator final : public OutputDecorator {
21  public:
26  MirrorOutputDecorator(std::unique_ptr<OutputPrintPolicy> wrappee,
27  unsigned int maxWidth = 180)
28  : OutputDecorator(std::move(wrappee)), m_maxWidth(maxWidth) {}
29 
36  void flush(const Level& lvl, const std::ostringstream& input) override {
37  std::ostringstream os;
38  std::string text = input.str();
39  std::reverse(text.begin(), text.end());
40  os << std::right << std::setw(m_maxWidth) << text;
41  OutputDecorator::flush(lvl, os);
42  }
43 
44  private:
46  unsigned int m_maxWidth;
47 };
48 
49 } // namespace Logging
50 
62 std::unique_ptr<const Logger> getDefaultLogger(const std::string& name,
63  const Logging::Level& lvl,
64  std::ostream* log_stream) {
65  using namespace Logging;
66  auto output = std::make_unique<LevelOutputDecorator>(
67  std::make_unique<NamedOutputDecorator>(
68  std::make_unique<TimedOutputDecorator>(
69  std::make_unique<MirrorOutputDecorator>(
70  std::make_unique<DefaultPrintPolicy>(log_stream))),
71  name));
72  auto print = std::make_unique<DefaultFilterPolicy>(lvl);
73  return std::make_unique<const Logger>(std::move(output), std::move(print));
74 }
75 
76 } // namespace Acts