ui/compositor/layer_animation_observer.cc

   1 // Copyright (c) 2012 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 #include "ui/compositor/layer_animation_observer.h"
   6
   7 #include "ui/compositor/layer_animation_sequence.h"
   8
   9 namespace ui {
  10
  11 ////////////////////////////////////////////////////////////////////////////////
  12 // LayerAnimationObserver
  13
  14 LayerAnimationObserver::LayerAnimationObserver() {
  15 }
  16
  17 LayerAnimationObserver::~LayerAnimationObserver() {
  18   StopObserving();
  19 }
  20
  21 bool LayerAnimationObserver::RequiresNotificationWhenAnimatorDestroyed() const {
  22   return false;
  23 }
  24
  25 void LayerAnimationObserver::OnAttachedToSequence(
  26     LayerAnimationSequence* sequence) {
  27 }
  28
  29 void LayerAnimationObserver::OnDetachedFromSequence(
  30     LayerAnimationSequence* sequence) {
  31 }
  32
  33 void LayerAnimationObserver::StopObserving() {
  34   while (!attached_sequences_.empty()) {
  35     LayerAnimationSequence* sequence = *attached_sequences_.begin();
  36     sequence->RemoveObserver(this);
  37   }
  38 }
  39
  40 void LayerAnimationObserver::AttachedToSequence(
  41     LayerAnimationSequence* sequence) {
  42   DCHECK(attached_sequences_.find(sequence) == attached_sequences_.end());
  43   attached_sequences_.insert(sequence);
  44   OnAttachedToSequence(sequence);
  45 }
  46
  47 void LayerAnimationObserver::DetachedFromSequence(
  48     LayerAnimationSequence* sequence, bool send_notification) {
  49   if (attached_sequences_.find(sequence) != attached_sequences_.end())
  50     attached_sequences_.erase(sequence);
  51   if (send_notification)
  52     OnDetachedFromSequence(sequence);
  53 }
  54
  55 ////////////////////////////////////////////////////////////////////////////////
  56 // ImplicitAnimationObserver
  57
  58 ImplicitAnimationObserver::ImplicitAnimationObserver()
  59     : active_(false),
  60       destroyed_(NULL),
  61       first_sequence_scheduled_(false) {
  62 }
  63
  64 ImplicitAnimationObserver::~ImplicitAnimationObserver() {
  65   if (destroyed_)
  66     *destroyed_ = true;
  67 }
  68
  69 void ImplicitAnimationObserver::SetActive(bool active) {
  70   active_ = active;
  71   CheckCompleted();
  72 }
  73
  74 void ImplicitAnimationObserver::StopObservingImplicitAnimations() {
  75   SetActive(false);
  76   StopObserving();
  77 }
  78
  79 bool ImplicitAnimationObserver::WasAnimationAbortedForProperty(
  80     LayerAnimationElement::AnimatableProperty property) const {
  81   return AnimationStatusForProperty(property) == ANIMATION_STATUS_ABORTED;
  82 }
  83
  84 bool ImplicitAnimationObserver::WasAnimationCompletedForProperty(
  85     LayerAnimationElement::AnimatableProperty property) const {
  86   return AnimationStatusForProperty(property) == ANIMATION_STATUS_COMPLETED;
  87 }
  88
  89 void ImplicitAnimationObserver::OnLayerAnimationEnded(
  90     LayerAnimationSequence* sequence) {
  91   UpdatePropertyAnimationStatus(sequence, ANIMATION_STATUS_COMPLETED);
  92   bool destroyed = false;
  93   destroyed_ = &destroyed;
  94   sequence->RemoveObserver(this);
  95   if (destroyed)
  96     return;
  97   destroyed_ = NULL;
  98   DCHECK(attached_sequences().find(sequence) == attached_sequences().end());
  99   CheckCompleted();
 100 }
 101
 102 void ImplicitAnimationObserver::OnLayerAnimationAborted(
 103     LayerAnimationSequence* sequence) {
 104   UpdatePropertyAnimationStatus(sequence, ANIMATION_STATUS_ABORTED);
 105   bool destroyed = false;
 106   destroyed_ = &destroyed;
 107   sequence->RemoveObserver(this);
 108   if (destroyed)
 109     return;
 110   destroyed_ = NULL;
 111   DCHECK(attached_sequences().find(sequence) == attached_sequences().end());
 112   CheckCompleted();
 113 }
 114
 115 void ImplicitAnimationObserver::OnLayerAnimationScheduled(
 116     LayerAnimationSequence* sequence) {
 117   if (!first_sequence_scheduled_) {
 118     first_sequence_scheduled_ = true;
 119     OnImplicitAnimationsScheduled();
 120   }
 121 }
 122
 123 void ImplicitAnimationObserver::OnAttachedToSequence(
 124     LayerAnimationSequence* sequence) {
 125 }
 126
 127 void ImplicitAnimationObserver::OnDetachedFromSequence(
 128     LayerAnimationSequence* sequence) {
 129   DCHECK(attached_sequences().find(sequence) == attached_sequences().end());
 130   CheckCompleted();
 131 }
 132
 133 void ImplicitAnimationObserver::CheckCompleted() {
 134   if (active_ && attached_sequences().empty()) {
 135     active_ = false;
 136     OnImplicitAnimationsCompleted();
 137   }
 138 }
 139
 140 void ImplicitAnimationObserver::UpdatePropertyAnimationStatus(
 141     LayerAnimationSequence* sequence,
 142     AnimationStatus status) {
 143   LayerAnimationElement::AnimatableProperties properties =
 144       sequence->properties();
 145   for (unsigned i = LayerAnimationElement::FIRST_PROPERTY;
 146        i != LayerAnimationElement::SENTINEL;
 147        i = i << 1) {
 148     if (i & properties) {
 149       LayerAnimationElement::AnimatableProperty property =
 150           static_cast<LayerAnimationElement::AnimatableProperty>(i);
 151       property_animation_status_[property] = status;
 152     }
 153   }
 154 }
 155
 156 ImplicitAnimationObserver::AnimationStatus
 157 ImplicitAnimationObserver::AnimationStatusForProperty(
 158     LayerAnimationElement::AnimatableProperty property) const {
 159   PropertyAnimationStatusMap::const_iterator iter =
 160       property_animation_status_.find(property);
 161   return iter == property_animation_status_.end() ? ANIMATION_STATUS_UNKNOWN :
 162       iter->second;
 163 }
 164
 165 }  // namespace ui