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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_COMPOSITOR_SCOPED_ANIMATION_DURATION_SCALE_MODE_H_
      6 #define UI_COMPOSITOR_SCOPED_ANIMATION_DURATION_SCALE_MODE_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "ui/compositor/compositor_export.h"
     10 
     11 namespace ui {
     12 
     13 // Speed up or slow down animations for testing or debugging.
     14 class COMPOSITOR_EXPORT ScopedAnimationDurationScaleMode {
     15  public:
     16   enum DurationScaleMode {
     17     NORMAL_DURATION,
     18     FAST_DURATION,
     19     SLOW_DURATION,
     20     // A very short but guaranteed non-zero duration for individual tests that
     21     // need to assert things about animations after creating them.
     22     NON_ZERO_DURATION,
     23     // Animations complete immediately after being created. Used by most tests.
     24     ZERO_DURATION
     25   };
     26 
     27   explicit ScopedAnimationDurationScaleMode(
     28       DurationScaleMode scoped_duration_scale_mode)
     29       : old_duration_scale_mode_(duration_scale_mode_) {
     30     duration_scale_mode_ = scoped_duration_scale_mode;
     31   }
     32 
     33   ~ScopedAnimationDurationScaleMode() {
     34     duration_scale_mode_ = old_duration_scale_mode_;
     35   }
     36 
     37   static DurationScaleMode duration_scale_mode() {
     38     return duration_scale_mode_;
     39   }
     40 
     41  private:
     42   DurationScaleMode old_duration_scale_mode_;
     43 
     44   static DurationScaleMode duration_scale_mode_;
     45 
     46   DISALLOW_COPY_AND_ASSIGN(ScopedAnimationDurationScaleMode);
     47 };
     48 
     49 }  // namespace ui
     50 
     51 #endif  // UI_COMPOSITOR_SCOPED_ANIMATION_DURATION_SCALE_MODE_H
     52