Reland r107720 - Enable the new layer animation framework.

ui/gfx/compositor/layer_animation_manager.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 "ui/gfx/compositor/layer_animation_manager.h"
-
-#include "base/logging.h"
-#include "base/stl_util.h"
-#include "ui/base/animation/animation_container.h"
-#include "ui/base/animation/animation.h"
-#include "ui/base/animation/tween.h"
-#include "ui/gfx/compositor/compositor.h"
-#include "ui/gfx/compositor/layer.h"
-#include "ui/gfx/compositor/layer_animator_delegate.h"
-#include "ui/gfx/transform.h"
-#include "ui/gfx/rect.h"
-
-namespace {
-
-void SetMatrixElement(SkMatrix44& matrix, int index, SkMScalar value) {
-  int row = index / 4;
-  int col = index % 4;
-  matrix.set(row, col, value);
-}
-
-SkMScalar GetMatrixElement(const SkMatrix44& matrix, int index) {
-  int row = index / 4;
-  int col = index % 4;
-  return matrix.get(row, col);
-}
-
-} // anonymous namespace
-
-namespace ui {
-
-LayerAnimationManager::LayerAnimationManager(Layer* layer)
-    : layer_(layer),
-      got_initial_tick_(false) {
-}
-
-LayerAnimationManager::~LayerAnimationManager() {
-}
-
-void LayerAnimationManager::SetAnimation(Animation* animation) {
-  animation_.reset(animation);
-  if (animation_.get()) {
-    static ui::AnimationContainer* container = NULL;
-    if (!container) {
-      container = new AnimationContainer;
-      container->AddRef();
-    }
-    animation_->set_delegate(this);
-    animation_->SetContainer(container);
-    got_initial_tick_ = false;
-  }
-}
-
-void LayerAnimationManager::AnimateToPoint(const gfx::Point& target) {
-  StopAnimating(LOCATION);
-  const gfx::Rect& layer_bounds = layer_->bounds();
-  if (target == layer_bounds.origin())
-    return;  // Already there.
-
-  Params& element = elements_[LOCATION];
-  element.location.target_x = target.x();
-  element.location.target_y = target.y();
-  element.location.start_x = layer_bounds.origin().x();
-  element.location.start_y = layer_bounds.origin().y();
-}
-
-void LayerAnimationManager::AnimateTransform(const Transform& transform) {
-  StopAnimating(TRANSFORM);
-  const Transform& layer_transform = layer_->transform();
-  if (transform == layer_transform)
-    return;  // Already there.
-
-  Params& element = elements_[TRANSFORM];
-  for (int i = 0; i < 16; ++i) {
-    element.transform.start[i] =
-        GetMatrixElement(layer_transform.matrix(), i);
-    element.transform.target[i] =
-        GetMatrixElement(transform.matrix(), i);
-  }
-}
-
-void LayerAnimationManager::AnimateOpacity(float target_opacity) {
-  StopAnimating(OPACITY);
-  if (layer_->opacity() == target_opacity)
-    return;
-
-  Params& element = elements_[OPACITY];
-  element.opacity.start = layer_->opacity();
-  element.opacity.target = target_opacity;
-}
-
-gfx::Point LayerAnimationManager::GetTargetPoint() {
-  return IsAnimating(LOCATION) ?
-      gfx::Point(elements_[LOCATION].location.target_x,
-                 elements_[LOCATION].location.target_y) :
-      layer_->bounds().origin();
-}
-
-float LayerAnimationManager::GetTargetOpacity() {
-  return IsAnimating(OPACITY) ?
-      elements_[OPACITY].opacity.target : layer_->opacity();
-}
-
-ui::Transform LayerAnimationManager::GetTargetTransform() {
-  if (IsAnimating(TRANSFORM)) {
-    Transform transform;
-    for (int i = 0; i < 16; ++i) {
-      SetMatrixElement(transform.matrix(), i,
-                       elements_[TRANSFORM].transform.target[i]);
-    }
-    return transform;
-  }
-  return layer_->transform();
-}
-
-bool LayerAnimationManager::IsAnimating(AnimationProperty property) const {
-  return elements_.count(property) > 0;
-}
-
-bool LayerAnimationManager::IsRunning() const {
-  return animation_.get() && animation_->is_animating();
-}
-
-void LayerAnimationManager::AnimationProgressed(
-    const ui::Animation* animation) {
-  got_initial_tick_ = true;
-  for (Elements::const_iterator i = elements_.begin(); i != elements_.end();
-       ++i) {
-    switch (i->first) {
-      case LOCATION: {
-        const gfx::Rect& current_bounds(layer_->bounds());
-        gfx::Rect new_bounds = animation_->CurrentValueBetween(
-            gfx::Rect(gfx::Point(i->second.location.start_x,
-                                 i->second.location.start_y),
-                      current_bounds.size()),
-            gfx::Rect(gfx::Point(i->second.location.target_x,
-                                 i->second.location.target_y),
-                      current_bounds.size()));
-        delegate()->SetBoundsFromAnimator(new_bounds);
-        break;
-      }
-
-      case TRANSFORM: {
-        Transform transform;
-        for (int j = 0; j < 16; ++j) {
-          SkMScalar value = animation_->CurrentValueBetween(
-              i->second.transform.start[j],
-              i->second.transform.target[j]);
-          SetMatrixElement(transform.matrix(), j, value);
-        }
-        delegate()->SetTransformFromAnimator(transform);
-        break;
-      }
-
-      case OPACITY: {
-        delegate()->SetOpacityFromAnimator(animation_->CurrentValueBetween(
-            i->second.opacity.start, i->second.opacity.target));
-        break;
-      }
-
-      default:
-        NOTREACHED();
-    }
-  }
-  layer_->ScheduleDraw();
-}
-
-void LayerAnimationManager::AnimationEnded(const ui::Animation* animation) {
-  AnimationProgressed(animation);
-  if (layer_->delegate())
-    layer_->delegate()->OnLayerAnimationEnded(animation);
-}
-
-void LayerAnimationManager::StopAnimating(AnimationProperty property) {
-  if (!IsAnimating(property))
-    return;
-
-  elements_.erase(property);
-}
-
-LayerAnimatorDelegate* LayerAnimationManager::delegate() {
-  return static_cast<LayerAnimatorDelegate*>(layer_);
-}
-
-}  // namespace ui