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 void ImplicitAnimationObserver::OnLayerAnimationEnded(
  80     LayerAnimationSequence* sequence) {
  81   bool destroyed = false;
  82   destroyed_ = &destroyed;
  83   sequence->RemoveObserver(this);
  84   if (destroyed)
  85     return;
  86   destroyed_ = NULL;
  87   DCHECK(attached_sequences().find(sequence) == attached_sequences().end());
  88   CheckCompleted();
  89 }
  90
  91 void ImplicitAnimationObserver::OnLayerAnimationAborted(
  92     LayerAnimationSequence* sequence) {
  93   sequence->RemoveObserver(this);
  94   DCHECK(attached_sequences().find(sequence) == attached_sequences().end());
  95   CheckCompleted();
  96 }
  97
  98 void ImplicitAnimationObserver::OnLayerAnimationScheduled(
  99     LayerAnimationSequence* sequence) {
 100   if (!first_sequence_scheduled_) {
 101     first_sequence_scheduled_ = true;
 102     OnImplicitAnimationsScheduled();
 103   }
 104 }
 105
 106 void ImplicitAnimationObserver::OnAttachedToSequence(
 107     LayerAnimationSequence* sequence) {
 108 }
 109
 110 void ImplicitAnimationObserver::OnDetachedFromSequence(
 111     LayerAnimationSequence* sequence) {
 112   DCHECK(attached_sequences().find(sequence) == attached_sequences().end());
 113   CheckCompleted();
 114 }
 115
 116 void ImplicitAnimationObserver::CheckCompleted() {
 117   if (active_ && attached_sequences().empty()) {
 118     active_ = false;
 119     OnImplicitAnimationsCompleted();
 120   }
 121 }
 122
 123 }  // namespace ui