layout/base/nsAutoLayoutPhase.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 nsAutoLayoutPhase_h
   8 #define nsAutoLayoutPhase_h
   9
  10 #ifdef DEBUG
  11
  12 #  include <stdint.h>
  13
  14 enum class nsLayoutPhase : uint8_t;
  15 class nsPresContext;
  16
  17 struct nsAutoLayoutPhase {
  18   nsAutoLayoutPhase(nsPresContext* aPresContext, nsLayoutPhase aPhase);
  19   ~nsAutoLayoutPhase();
  20
  21   void Enter();
  22   void Exit();
  23
  24  private:
  25   nsPresContext* mPresContext;
  26   nsLayoutPhase mPhase;
  27   uint32_t mCount;
  28 };
  29
  30 #  define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
  31     nsAutoLayoutPhase autoLayoutPhase((pc_), (nsLayoutPhase::phase_))
  32 #  define LAYOUT_PHASE_TEMP_EXIT() \
  33     PR_BEGIN_MACRO                 \
  34     autoLayoutPhase.Exit();        \
  35     PR_END_MACRO
  36 #  define LAYOUT_PHASE_TEMP_REENTER() \
  37     PR_BEGIN_MACRO                    \
  38     autoLayoutPhase.Enter();          \
  39     PR_END_MACRO
  40
  41 #else  // DEBUG
  42
  43 #  define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) PR_BEGIN_MACRO PR_END_MACRO
  44 #  define LAYOUT_PHASE_TEMP_EXIT() PR_BEGIN_MACRO PR_END_MACRO
  45 #  define LAYOUT_PHASE_TEMP_REENTER() PR_BEGIN_MACRO PR_END_MACRO
  46
  47 #endif  // DEBUG
  48
  49 #endif  // nsAutoLayoutPhase_h