1 files changed, 54 insertions, 0 deletions
diff --git a/ui/compositor/scoped_layer_animation_settings.h b/ui/compositor/scoped_layer_animation_settings.h
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+++ b/ui/compositor/scoped_layer_animation_settings.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
+#define UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
+#pragma once
+
+#include <set>
+
+#include "base/time.h"
+
+#include "ui/base/animation/tween.h"
+#include "ui/compositor/compositor_export.h"
+#include "ui/compositor/layer_animator.h"
+
+namespace ui {
+
+class ImplicitAnimationObserver;
+class LayerAnimationObserver;
+
+// Scoped settings allow you to temporarily change the animator's settings and
+// these changes are reverted when the object is destroyed. NOTE: when the
+// settings object is created, it applies the default transition duration
+// (200ms).
+class COMPOSITOR_EXPORT ScopedLayerAnimationSettings {
+ public:
+  explicit ScopedLayerAnimationSettings(LayerAnimator* animator);
+  virtual ~ScopedLayerAnimationSettings();
+
+  void AddObserver(ImplicitAnimationObserver* observer);
+
+  void SetTransitionDuration(base::TimeDelta duration);
+  base::TimeDelta GetTransitionDuration() const;
+
+  void SetTweenType(Tween::Type tween_type);
+  Tween::Type GetTweenType() const;
+
+  void SetPreemptionStrategy(LayerAnimator::PreemptionStrategy strategy);
+  LayerAnimator::PreemptionStrategy GetPreemptionStrategy() const;
+
+ private:
+  LayerAnimator* animator_;
+  base::TimeDelta old_transition_duration_;
+  Tween::Type old_tween_type_;
+  LayerAnimator::PreemptionStrategy old_preemption_strategy_;
+  std::set<ImplicitAnimationObserver*> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedLayerAnimationSettings);
+};
+
+}  // namespace ui
+
+#endif  // UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_