1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
// 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.
#include "ash/display/output_configurator_animation.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "base/bind.h"
#include "base/stl_util.h"
#include "base/time/time.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/compositor/layer_animation_sequence.h"
#include "ui/compositor/layer_animator.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
namespace ash {
namespace internal {
namespace {
const int kFadingAnimationDurationInMS = 200;
const int kFadingTimeoutDurationInSeconds = 10;
// CallbackRunningObserver accepts multiple layer animations and
// runs the specified |callback| when all of the animations have finished.
class CallbackRunningObserver {
public:
CallbackRunningObserver(base::Closure callback)
: completed_counter_(0),
animation_aborted_(false),
callback_(callback) {}
void AddNewAnimator(ui::LayerAnimator* animator) {
Observer* observer = new Observer(animator, this);
animator->AddObserver(observer);
observer_list_.push_back(observer);
}
private:
void OnSingleTaskCompleted() {
completed_counter_++;
if (completed_counter_ >= observer_list_.size()) {
base::MessageLoopForUI::current()->DeleteSoon(FROM_HERE, this);
if (!animation_aborted_)
base::MessageLoopForUI::current()->PostTask(FROM_HERE, callback_);
}
}
void OnSingleTaskAborted() {
animation_aborted_ = true;
OnSingleTaskCompleted();
}
// The actual observer to listen each animation completion.
class Observer : public ui::LayerAnimationObserver {
public:
Observer(ui::LayerAnimator* animator,
CallbackRunningObserver* observer)
: animator_(animator),
observer_(observer) {}
protected:
// ui::LayerAnimationObserver overrides:
virtual void OnLayerAnimationEnded(
ui::LayerAnimationSequence* sequence) OVERRIDE {
animator_->RemoveObserver(this);
observer_->OnSingleTaskCompleted();
}
virtual void OnLayerAnimationAborted(
ui::LayerAnimationSequence* sequence) OVERRIDE {
animator_->RemoveObserver(this);
observer_->OnSingleTaskAborted();
}
virtual void OnLayerAnimationScheduled(
ui::LayerAnimationSequence* sequence) OVERRIDE {
}
virtual bool RequiresNotificationWhenAnimatorDestroyed() const OVERRIDE {
return true;
}
private:
ui::LayerAnimator* animator_;
CallbackRunningObserver* observer_;
DISALLOW_COPY_AND_ASSIGN(Observer);
};
size_t completed_counter_;
bool animation_aborted_;
ScopedVector<Observer> observer_list_;
base::Closure callback_;
DISALLOW_COPY_AND_ASSIGN(CallbackRunningObserver);
};
} // namespace
OutputConfiguratorAnimation::OutputConfiguratorAnimation() {
}
OutputConfiguratorAnimation::~OutputConfiguratorAnimation() {
ClearHidingLayers();
}
void OutputConfiguratorAnimation::StartFadeOutAnimation(
base::Closure callback) {
CallbackRunningObserver* observer = new CallbackRunningObserver(callback);
ClearHidingLayers();
// Make the fade-out animation for all root windows. Instead of actually
// hiding the root windows, we put a black layer over a root window for
// safety. These layers remain to hide root windows and will be deleted
// after the animation of OnDisplayModeChanged().
Shell::RootWindowList root_windows =
Shell::GetInstance()->GetAllRootWindows();
for (Shell::RootWindowList::const_iterator it = root_windows.begin();
it != root_windows.end(); ++it) {
aura::RootWindow* root_window = *it;
ui::Layer* hiding_layer = new ui::Layer(ui::LAYER_SOLID_COLOR);
hiding_layer->SetColor(SK_ColorBLACK);
hiding_layer->SetBounds(root_window->bounds());
ui::Layer* parent = ash::Shell::GetContainer(
root_window,
ash::internal::kShellWindowId_OverlayContainer)->layer();
parent->Add(hiding_layer);
hiding_layer->SetOpacity(0.0);
ui::ScopedLayerAnimationSettings settings(hiding_layer->GetAnimator());
settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
kFadingAnimationDurationInMS));
observer->AddNewAnimator(hiding_layer->GetAnimator());
hiding_layer->SetOpacity(1.0f);
hiding_layer->SetVisible(true);
hiding_layers_[root_window] = hiding_layer;
}
// In case that OnDisplayModeChanged() isn't called or its animator is
// canceled due to some unknown errors, we set a timer to clear these
// hiding layers.
timer_.reset(new base::OneShotTimer<OutputConfiguratorAnimation>());
timer_->Start(FROM_HERE,
base::TimeDelta::FromSeconds(kFadingTimeoutDurationInSeconds),
this,
&OutputConfiguratorAnimation::ClearHidingLayers);
}
void OutputConfiguratorAnimation::StartFadeInAnimation() {
// We want to make sure clearing all of hiding layers after the animation
// finished. Note that this callback can be canceled, but the cancel only
// happens when the next animation is scheduled. Thus the hiding layers
// should be deleted eventually.
CallbackRunningObserver* observer = new CallbackRunningObserver(
base::Bind(&OutputConfiguratorAnimation::ClearHidingLayers,
base::Unretained(this)));
// Ensure that layers are not animating.
for (std::map<aura::RootWindow*, ui::Layer*>::iterator it =
hiding_layers_.begin(); it != hiding_layers_.end(); ++it) {
ui::LayerAnimator* animator = it->second->GetAnimator();
if (animator->is_animating())
animator->StopAnimating();
}
// Schedules the fade-in effect for all root windows. Because we put the
// black layers for fade-out, here we actually turn those black layers
// invisible.
Shell::RootWindowList root_windows =
Shell::GetInstance()->GetAllRootWindows();
for (Shell::RootWindowList::const_iterator it = root_windows.begin();
it != root_windows.end(); ++it) {
aura::RootWindow* root_window = *it;
ui::Layer* hiding_layer = NULL;
if (hiding_layers_.find(root_window) == hiding_layers_.end()) {
// In case of the transition from mirroring->non-mirroring, new root
// windows appear and we do not have the black layers for them. Thus
// we need to create the layer and make it visible.
hiding_layer = new ui::Layer(ui::LAYER_SOLID_COLOR);
hiding_layer->SetColor(SK_ColorBLACK);
hiding_layer->SetBounds(root_window->bounds());
ui::Layer* parent = ash::Shell::GetContainer(
root_window,
ash::internal::kShellWindowId_OverlayContainer)->layer();
parent->Add(hiding_layer);
hiding_layer->SetOpacity(1.0f);
hiding_layer->SetVisible(true);
hiding_layers_[root_window] = hiding_layer;
} else {
hiding_layer = hiding_layers_[root_window];
if (hiding_layer->bounds() != root_window->bounds())
hiding_layer->SetBounds(root_window->bounds());
}
ui::ScopedLayerAnimationSettings settings(hiding_layer->GetAnimator());
settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
kFadingAnimationDurationInMS));
observer->AddNewAnimator(hiding_layer->GetAnimator());
hiding_layer->SetOpacity(0.0f);
hiding_layer->SetVisible(false);
}
}
void OutputConfiguratorAnimation::OnDisplayModeChanged() {
if (!hiding_layers_.empty())
StartFadeInAnimation();
}
void OutputConfiguratorAnimation::OnDisplayModeChangeFailed(
chromeos::OutputState failed_new_state) {
if (!hiding_layers_.empty())
StartFadeInAnimation();
}
void OutputConfiguratorAnimation::ClearHidingLayers() {
if (timer_) {
timer_->Stop();
timer_.reset();
}
STLDeleteContainerPairSecondPointers(
hiding_layers_.begin(), hiding_layers_.end());
hiding_layers_.clear();
}
} // namespace internal
} // namespace ash
|
