Reland r107720 - Enable the new layer animation framework.

chrome/browser/ui/touch/animation/screen_rotation_animator.cc

 // Copyright (c) 2011 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.
 
-#include "chrome/browser/ui/touch/animation/screen_rotation_setter.h"
+#include "chrome/browser/ui/touch/animation/screen_rotation_animator.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/touch/animation/screen_rotation.h"
 #include "ui/gfx/compositor/layer.h"
 #include "ui/gfx/interpolated_transform.h"
-#include "views/layer_property_setter.h"
 #include "views/view.h"
 
 namespace {
 
 static int SymmetricRound(float x) {
   return static_cast<int>(
     x > 0
       ? std::floor(x + 0.5f)
       : std::ceil(x - 0.5f));
 }
 
-// A screen rotation setter is a LayerPropertySetter that initiates screen
+// A screen rotation animator is a LayerAnimator that initiates screen
 // rotations in response to calls to |SetTransform|. Calls to |SetBounds| are
 // applied to the layer immediately.
-class ScreenRotationSetter : public views::LayerPropertySetter,
-                             public ScreenRotationListener {
+class ScreenRotationAnimator : public ui::LayerAnimator,
+                               public ScreenRotationListener {
  public:
-  explicit ScreenRotationSetter(views::View* view);
+  explicit ScreenRotationAnimator(views::View* view);
+  virtual ~ScreenRotationAnimator();
 
-  // implementation of LayerPropertySetter
-  virtual void Installed(ui::Layer* layer) OVERRIDE;
-  virtual void Uninstalled(ui::Layer* layer) OVERRIDE;
-  virtual void SetTransform(ui::Layer* layer,
-                            const ui::Transform& transform) OVERRIDE;
-  virtual void SetBounds(ui::Layer* layer, const gfx::Rect& bounds) OVERRIDE;
+ private:
+  // implementation of LayerAnimator
+  virtual void SetLayer(ui::Layer* layer) OVERRIDE;
+  virtual void SetTransform(const ui::Transform& transform) OVERRIDE;
+  virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
 
   // implementation of ScreenRotationListener
   virtual void OnScreenRotationCompleted(const ui::Transform& final_transform,
                                          const gfx::Rect& final_rect) OVERRIDE;
 
- private:
   // This is the currently animating rotation. We hang onto it so that if a
   // call to |SetTransform| is made during the rotation, we can update the
   // target orientation of this rotation.
   scoped_ptr<ScreenRotation> rotation_;
 
   // If a call to SetBounds happens during a rotation its effect is delayed
   // until the rotation completes. If this happens several times, only the last
   // call to SetBounds will have any effect.
   scoped_ptr<gfx::Rect> pending_bounds_;
 
   // If a call to SetTransform happens during a rotation its effect is delayed
   // until the rotation completes. If this happens several times, only the last
   // call to SetTransform will have any effect.
   scoped_ptr<ui::Transform> pending_transform_;
 
-  // The screen rotation setter is associated with a view so that the view's
+  // The screen rotation animator is associated with a view so that the view's
   // bounds may be set when the animation completes.
   views::View* view_;
 
-  DISALLOW_COPY_AND_ASSIGN(ScreenRotationSetter);
+  DISALLOW_COPY_AND_ASSIGN(ScreenRotationAnimator);
 };
 
 
-ScreenRotationSetter::ScreenRotationSetter(views::View* view) : view_(view) {
+ScreenRotationAnimator::ScreenRotationAnimator(views::View* view)
+    : ui::LayerAnimator(base::TimeDelta::FromMilliseconds(0)),
+      view_(view) {
 }
 
-void ScreenRotationSetter::Installed(ui::Layer* layer) OVERRIDE {
+ScreenRotationAnimator::~ScreenRotationAnimator() {
 }
 
-void ScreenRotationSetter::Uninstalled(ui::Layer* layer) OVERRIDE {
-  if (rotation_.get())
+void ScreenRotationAnimator::SetLayer(ui::Layer* layer) {
+  if (!layer && rotation_.get())
     rotation_->Stop();
+
+  DCHECK(!layer || layer == view_->layer());
+  ui::LayerAnimator::SetDelegate(layer);
 }
 
-void ScreenRotationSetter::SetTransform(ui::Layer* layer,
-                                        const ui::Transform& transform) {
+void ScreenRotationAnimator::SetTransform(const ui::Transform& transform) {
   if (rotation_.get()) {
     pending_transform_.reset(new ui::Transform(transform));
   } else {
     float new_degrees, old_degrees;
-    if (ui::InterpolatedTransform::FactorTRS(transform,
-                                             NULL, &new_degrees, NULL) &&
-        ui::InterpolatedTransform::FactorTRS(layer->transform(),
-                                             NULL, &old_degrees, NULL)) {
+    if (ui::InterpolatedTransform::FactorTRS(
+            transform, NULL, &new_degrees, NULL) &&
+        ui::InterpolatedTransform::FactorTRS(
+            delegate()->GetTransformForAnimation(), NULL, &old_degrees, NULL)) {
       rotation_.reset(new ScreenRotation(view_,
+                                         delegate(),
                                          this,
                                          SymmetricRound(old_degrees),
                                          SymmetricRound(new_degrees)));
     }
   }
 }
 
-void ScreenRotationSetter::SetBounds(ui::Layer* layer,
-                                     const gfx::Rect& bounds) {
+void ScreenRotationAnimator::SetBounds(const gfx::Rect& bounds) {
   // cache bounds changes during an animation.
   if (rotation_.get())
     pending_bounds_.reset(new gfx::Rect(bounds));
   else
-    layer->SetBounds(bounds);
+    delegate()->SetBoundsFromAnimation(bounds);
 }
 
-void ScreenRotationSetter::OnScreenRotationCompleted(
+void ScreenRotationAnimator::OnScreenRotationCompleted(
     const ui::Transform& final_transform,
     const gfx::Rect& final_bounds) {
   // destroy the animation.
   rotation_.reset();
 
-  if (pending_bounds_.get() && view_->layer()) {
+  if (pending_bounds_.get() && delegate()) {
     // If there are any pending bounds changes, they will have already been
     // applied to the view, and are waiting to be applied to the layer.
-    view_->layer()->SetBounds(*pending_bounds_);
+    delegate()->SetBoundsFromAnimation(*pending_bounds_);
     pending_bounds_.reset();
   } else if (!final_bounds.IsEmpty()) {
     // Otherwise we may have new bounds as the result of the completed screen
     // rotation. Apply these to the view.
     view_->SetBoundsRect(final_bounds);
   }
 
-  if (pending_transform_.get() && view_->layer()) {
+  if (pending_transform_.get() && delegate()) {
     // If there is a pending transformation, we need to initiate another
     // animation.
-    SetTransform(view_->layer(), *pending_transform_);
+    SetTransform(*pending_transform_);
     pending_transform_.reset();
   }
 }
 
 }  // namespace
 
-views::LayerPropertySetter* ScreenRotationSetterFactory::Create(
-    views::View* view) {
-  return new ScreenRotationSetter(view);
+ui::LayerAnimator* ScreenRotationAnimatorFactory::Create(views::View* view) {
+  return new ScreenRotationAnimator(view);
 }