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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ash/wm/window_cycle_list.h" | 5 #include "ash/wm/window_cycle_list.h" |
6 | 6 |
7 #include <list> | |
8 #include <map> | |
9 | |
10 #include "ash/common/ash_switches.h" | |
11 #include "ash/common/shell_window_ids.h" | |
12 #include "ash/common/wm/forwarding_layer_delegate.h" | |
7 #include "ash/common/wm/mru_window_tracker.h" | 13 #include "ash/common/wm/mru_window_tracker.h" |
8 #include "ash/common/wm/window_state.h" | 14 #include "ash/common/wm/window_state.h" |
15 #include "ash/common/wm_root_window_controller.h" | |
9 #include "ash/common/wm_shell.h" | 16 #include "ash/common/wm_shell.h" |
10 #include "ash/common/wm_window.h" | 17 #include "ash/common/wm_window.h" |
11 #include "ash/shell.h" | 18 #include "ash/shell.h" |
12 #include "ash/wm/window_animations.h" | 19 #include "ash/wm/window_animations.h" |
13 #include "ash/wm/window_util.h" | 20 #include "ash/wm/window_util.h" |
21 #include "base/command_line.h" | |
22 #include "ui/compositor/layer_tree_owner.h" | |
23 #include "ui/views/background.h" | |
24 #include "ui/views/layout/box_layout.h" | |
25 #include "ui/views/painter.h" | |
26 #include "ui/views/view.h" | |
27 #include "ui/views/widget/widget.h" | |
28 #include "ui/wm/core/visibility_controller.h" | |
29 #include "ui/wm/core/window_util.h" | |
14 | 30 |
15 namespace ash { | 31 namespace ash { |
16 | 32 |
33 void EnsureAllChildrenAreVisible(ui::Layer* layer) { | |
34 std::list<ui::Layer*> layers; | |
35 layers.push_back(layer); | |
36 while (!layers.empty()) { | |
37 for (auto child : layers.front()->children()) | |
38 layers.push_back(child); | |
39 layers.front()->SetVisible(true); | |
40 layers.pop_front(); | |
41 } | |
42 } | |
43 | |
17 // Returns the window immediately below |window| in the current container. | 44 // Returns the window immediately below |window| in the current container. |
18 WmWindow* GetWindowBelow(WmWindow* window) { | 45 WmWindow* GetWindowBelow(WmWindow* window) { |
19 WmWindow* parent = window->GetParent(); | 46 WmWindow* parent = window->GetParent(); |
20 if (!parent) | 47 if (!parent) |
21 return nullptr; | 48 return nullptr; |
22 const WmWindow::Windows children = parent->GetChildren(); | 49 const WmWindow::Windows children = parent->GetChildren(); |
23 auto iter = std::find(children.begin(), children.end(), window); | 50 auto iter = std::find(children.begin(), children.end(), window); |
24 CHECK(*iter == window); | 51 CHECK(*iter == window); |
25 return (iter != children.begin()) ? *(iter - 1) : nullptr; | 52 return (iter != children.begin()) ? *(iter - 1) : nullptr; |
26 } | 53 } |
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48 | 75 |
49 // The window immediately below where window_ belongs. | 76 // The window immediately below where window_ belongs. |
50 WmWindow* stack_window_above_; | 77 WmWindow* stack_window_above_; |
51 | 78 |
52 // If true, minimize window_ on going out of scope. | 79 // If true, minimize window_ on going out of scope. |
53 bool minimized_; | 80 bool minimized_; |
54 | 81 |
55 DISALLOW_COPY_AND_ASSIGN(ScopedShowWindow); | 82 DISALLOW_COPY_AND_ASSIGN(ScopedShowWindow); |
56 }; | 83 }; |
57 | 84 |
85 // A view that mirrors a single window. Layers are lifted from the underlying | |
86 // window (which gets new ones in their place). New paint calls, if any, are | |
87 // forwarded to the underlying window. | |
88 class WindowMirrorView : public views::View, public ::wm::LayerDelegateFactory { | |
89 public: | |
90 explicit WindowMirrorView(WmWindow* window) : target_(window) { | |
91 DCHECK(window); | |
92 } | |
93 ~WindowMirrorView() override {} | |
94 | |
95 void Init() { | |
96 SetPaintToLayer(true); | |
97 | |
98 layer_owner_ = ::wm::RecreateLayers( | |
99 target_->GetInternalWidget()->GetNativeView(), this); | |
100 | |
101 GetMirrorLayer()->parent()->Remove(GetMirrorLayer()); | |
102 layer()->Add(GetMirrorLayer()); | |
103 | |
104 // Some extra work is needed when the target window is minimized. | |
105 if (target_->GetWindowState()->IsMinimized()) { | |
106 GetMirrorLayer()->SetVisible(true); | |
107 GetMirrorLayer()->SetOpacity(1); | |
108 EnsureAllChildrenAreVisible(GetMirrorLayer()); | |
109 } | |
110 } | |
111 | |
112 // views::View: | |
113 gfx::Size GetPreferredSize() const override { | |
114 const int kMaxWidth = 800; | |
115 const int kMaxHeight = 600; | |
116 | |
117 gfx::Size target_size = target_->GetBounds().size(); | |
118 if (target_size.width() <= kMaxWidth && | |
119 target_size.height() <= kMaxHeight) { | |
120 return target_size; | |
121 } | |
122 | |
123 float scale = | |
124 std::min(kMaxWidth / static_cast<float>(target_size.width()), | |
125 kMaxHeight / static_cast<float>(target_size.height())); | |
126 return gfx::ScaleToCeiledSize(target_size, scale, scale); | |
127 } | |
128 | |
129 void Layout() override { | |
130 // Position at 0, 0. | |
131 GetMirrorLayer()->SetBounds(gfx::Rect(GetMirrorLayer()->bounds().size())); | |
132 | |
133 // Scale down if necessary. | |
134 gfx::Transform mirror_transform; | |
135 if (size() != target_->GetBounds().size()) { | |
136 const float scale = | |
137 width() / static_cast<float>(target_->GetBounds().width()); | |
138 mirror_transform.Scale(scale, scale); | |
139 } | |
140 GetMirrorLayer()->SetTransform(mirror_transform); | |
141 } | |
142 | |
143 // ::wm::LayerDelegateFactory: | |
144 ui::LayerDelegate* CreateDelegate(ui::LayerDelegate* delegate) override { | |
145 if (!delegate) | |
146 return nullptr; | |
147 delegates_.push_back( | |
148 base::WrapUnique(new wm::ForwardingLayerDelegate(target_, delegate))); | |
149 | |
150 return delegates_.back().get(); | |
151 } | |
152 | |
153 private: | |
154 // Gets the root of the layer tree that was lifted from |target_| (and is now | |
155 // a child of |this->layer()|). | |
156 ui::Layer* GetMirrorLayer() { return layer_owner_->root(); } | |
157 | |
158 // The original window that is being represented by |this|. | |
159 WmWindow* target_; | |
160 | |
161 // Retains ownership of the mirror layer tree. | |
162 std::unique_ptr<ui::LayerTreeOwner> layer_owner_; | |
163 | |
164 std::vector<std::unique_ptr<wm::ForwardingLayerDelegate>> delegates_; | |
165 | |
166 DISALLOW_COPY_AND_ASSIGN(WindowMirrorView); | |
167 }; | |
168 | |
169 // A view that shows a collection of windows the user can tab through. | |
170 class WindowCycleView : public views::View { | |
171 public: | |
172 explicit WindowCycleView(const WindowCycleList::WindowList& windows) | |
173 : mirror_container_(new views::View()), | |
174 selector_view_(new views::View()), | |
175 target_window_(nullptr) { | |
176 DCHECK(!windows.empty()); | |
177 SetPaintToLayer(true); | |
178 layer()->SetFillsBoundsOpaquely(false); | |
179 | |
180 // TODO(estade): adjust constants in this function (colors, spacing, corner | |
181 // radius) as per mocks. | |
182 const float kCornerRadius = 5; | |
183 set_background(views::Background::CreateBackgroundPainter( | |
184 true, views::Painter::CreateSolidRoundRectPainter( | |
185 SkColorSetA(SK_ColorBLACK, 0xA5), kCornerRadius))); | |
186 | |
187 views::BoxLayout* layout = | |
188 new views::BoxLayout(views::BoxLayout::kHorizontal, 25, 25, 20); | |
189 layout->set_cross_axis_alignment( | |
190 views::BoxLayout::CROSS_AXIS_ALIGNMENT_START); | |
191 mirror_container_->SetLayoutManager(layout); | |
192 | |
193 for (WmWindow* window : windows) { | |
194 WindowMirrorView* view = new WindowMirrorView(window); | |
195 view->Init(); | |
196 window_view_map_[window] = view; | |
197 mirror_container_->AddChildView(view); | |
198 } | |
199 | |
200 selector_view_->set_background(views::Background::CreateBackgroundPainter( | |
201 true, views::Painter::CreateSolidRoundRectPainter(SK_ColorBLUE, | |
202 kCornerRadius))); | |
203 | |
204 AddChildView(selector_view_); | |
205 AddChildView(mirror_container_); | |
206 SetTargetWindow(windows.front()); | |
207 } | |
208 | |
209 ~WindowCycleView() override {} | |
210 | |
211 void SetTargetWindow(WmWindow* target) { | |
212 target_window_ = target; | |
213 if (GetWidget()) | |
214 Layout(); | |
215 } | |
216 | |
217 void HandleWindowDestruction(WmWindow* destroying_window, | |
218 WmWindow* new_target) { | |
219 auto view_iter = window_view_map_.find(destroying_window); | |
220 view_iter->second->parent()->RemoveChildView(view_iter->second); | |
221 window_view_map_.erase(view_iter); | |
222 SetTargetWindow(new_target); | |
223 } | |
224 | |
225 // views::View overrides: | |
226 gfx::Size GetPreferredSize() const override { | |
227 return mirror_container_->GetPreferredSize(); | |
228 } | |
229 | |
230 void Layout() override { | |
231 // Possible if the last window is deleted. | |
232 if (!target_window_) | |
233 return; | |
234 | |
235 views::View* target_view = window_view_map_[target_window_]; | |
236 gfx::RectF target_bounds(target_view->GetLocalBounds()); | |
237 views::View::ConvertRectToTarget(target_view, this, &target_bounds); | |
238 target_bounds.Inset(gfx::InsetsF(-15)); | |
239 selector_view_->SetBoundsRect(gfx::ToEnclosingRect(target_bounds)); | |
240 | |
241 mirror_container_->SetBoundsRect(GetLocalBounds()); | |
242 } | |
243 | |
244 WmWindow* target_window() { return target_window_; } | |
245 | |
246 private: | |
247 std::map<WmWindow*, WindowMirrorView*> window_view_map_; | |
248 views::View* mirror_container_; | |
249 views::View* selector_view_; | |
250 WmWindow* target_window_; | |
251 | |
252 DISALLOW_COPY_AND_ASSIGN(WindowCycleView); | |
253 }; | |
254 | |
58 ScopedShowWindow::ScopedShowWindow() | 255 ScopedShowWindow::ScopedShowWindow() |
59 : window_(nullptr), stack_window_above_(nullptr), minimized_(false) {} | 256 : window_(nullptr), stack_window_above_(nullptr), minimized_(false) {} |
60 | 257 |
61 ScopedShowWindow::~ScopedShowWindow() { | 258 ScopedShowWindow::~ScopedShowWindow() { |
62 if (window_) { | 259 if (window_) { |
63 window_->GetParent()->RemoveObserver(this); | 260 window_->GetParent()->RemoveObserver(this); |
64 | 261 |
65 // Restore window's stacking position. | 262 // Restore window's stacking position. |
66 if (stack_window_above_) | 263 if (stack_window_above_) |
67 window_->GetParent()->StackChildAbove(window_, stack_window_above_); | 264 window_->GetParent()->StackChildAbove(window_, stack_window_above_); |
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100 if (params.target == window_) { | 297 if (params.target == window_) { |
101 CancelRestore(); | 298 CancelRestore(); |
102 } else if (params.target == stack_window_above_) { | 299 } else if (params.target == stack_window_above_) { |
103 // If the window this window was above is removed, use the next window down | 300 // If the window this window was above is removed, use the next window down |
104 // as the restore marker. | 301 // as the restore marker. |
105 stack_window_above_ = GetWindowBelow(stack_window_above_); | 302 stack_window_above_ = GetWindowBelow(stack_window_above_); |
106 } | 303 } |
107 } | 304 } |
108 | 305 |
109 WindowCycleList::WindowCycleList(const WindowList& windows) | 306 WindowCycleList::WindowCycleList(const WindowList& windows) |
110 : windows_(windows), current_index_(0) { | 307 : windows_(windows), current_index_(0), cycle_view_(nullptr) { |
111 WmShell::Get()->mru_window_tracker()->SetIgnoreActivations(true); | 308 WmShell::Get()->mru_window_tracker()->SetIgnoreActivations(true); |
112 | 309 |
113 for (WmWindow* window : windows_) | 310 for (WmWindow* window : windows_) |
114 window->AddObserver(this); | 311 window->AddObserver(this); |
312 | |
313 if (ShouldShowUi()) { | |
314 WmWindow* root_window = WmShell::Get()->GetTargetRootWindow(); | |
315 views::Widget* widget = new views::Widget; | |
316 views::Widget::InitParams params; | |
317 params.type = views::Widget::InitParams::TYPE_WINDOW_FRAMELESS; | |
318 params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET; | |
319 params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW; | |
320 params.accept_events = true; | |
321 // TODO(estade): make sure nothing untoward happens when the lock screen | |
322 // or a system modal dialog is shown. | |
323 root_window->GetRootWindowController() | |
324 ->ConfigureWidgetInitParamsForContainer( | |
325 widget, kShellWindowId_OverlayContainer, ¶ms); | |
326 widget->Init(params); | |
327 | |
328 cycle_view_ = new WindowCycleView(windows_); | |
329 | |
330 widget->SetContentsView(cycle_view_); | |
331 // TODO(estade): right now this just extends past the edge of the screen if | |
332 // there are too many windows. Handle this more gracefully. Also, if | |
333 // the display metrics change, cancel the UI. | |
334 gfx::Rect widget_rect = widget->GetWorkAreaBoundsInScreen(); | |
335 gfx::Size widget_size = cycle_view_->GetPreferredSize(); | |
336 widget_rect.ClampToCenteredSize(widget_size); | |
337 widget_rect.set_width(widget_size.width()); | |
338 widget->SetBounds(widget_rect); | |
339 widget->Show(); | |
340 cycle_ui_widget_.reset(widget); | |
341 } | |
115 } | 342 } |
116 | 343 |
117 WindowCycleList::~WindowCycleList() { | 344 WindowCycleList::~WindowCycleList() { |
118 WmShell::Get()->mru_window_tracker()->SetIgnoreActivations(false); | 345 WmShell::Get()->mru_window_tracker()->SetIgnoreActivations(false); |
119 for (WmWindow* window : windows_) { | 346 for (WmWindow* window : windows_) |
120 // TODO(oshima): Remove this once crbug.com/483491 is fixed. | |
121 CHECK(window); | |
122 window->RemoveObserver(this); | 347 window->RemoveObserver(this); |
123 } | 348 |
124 if (showing_window_) | 349 if (showing_window_) |
125 showing_window_->CancelRestore(); | 350 showing_window_->CancelRestore(); |
351 | |
352 if (cycle_view_ && cycle_view_->target_window()) { | |
353 cycle_view_->target_window()->Show(); | |
oshima
2016/07/15 23:33:00
Did you need this? Activating minimiezd window sho
Evan Stade
2016/07/15 23:39:29
I think it's necessary (90% sure I tried without u
oshima
2016/07/15 23:40:22
Acknowledged.
| |
354 cycle_view_->target_window()->GetWindowState()->Activate(); | |
355 } | |
126 } | 356 } |
127 | 357 |
128 void WindowCycleList::Step(WindowCycleController::Direction direction) { | 358 void WindowCycleList::Step(WindowCycleController::Direction direction) { |
129 if (windows_.empty()) | 359 if (windows_.empty()) |
130 return; | 360 return; |
131 | 361 |
132 // When there is only one window, we should give feedback to the user. If the | 362 // When there is only one window, we should give feedback to the user. If the |
133 // window is minimized, we should also show it. | 363 // window is minimized, we should also show it. |
134 if (windows_.size() == 1) { | 364 if (windows_.size() == 1) { |
135 windows_[0]->Animate(::wm::WINDOW_ANIMATION_TYPE_BOUNCE); | 365 windows_[0]->Animate(::wm::WINDOW_ANIMATION_TYPE_BOUNCE); |
136 windows_[0]->Show(); | 366 windows_[0]->Show(); |
137 windows_[0]->GetWindowState()->Activate(); | 367 windows_[0]->GetWindowState()->Activate(); |
138 return; | 368 return; |
139 } | 369 } |
140 | 370 |
141 DCHECK(static_cast<size_t>(current_index_) < windows_.size()); | 371 DCHECK(static_cast<size_t>(current_index_) < windows_.size()); |
142 | 372 |
143 // We're in a valid cycle, so step forward or backward. | 373 // We're in a valid cycle, so step forward or backward. |
144 current_index_ += direction == WindowCycleController::FORWARD ? 1 : -1; | 374 current_index_ += direction == WindowCycleController::FORWARD ? 1 : -1; |
145 | 375 |
146 // Wrap to window list size. | 376 // Wrap to window list size. |
147 current_index_ = (current_index_ + windows_.size()) % windows_.size(); | 377 current_index_ = (current_index_ + windows_.size()) % windows_.size(); |
148 DCHECK(windows_[current_index_]); | 378 DCHECK(windows_[current_index_]); |
149 | 379 |
380 if (cycle_view_) { | |
381 cycle_view_->SetTargetWindow(windows_[current_index_]); | |
382 return; | |
383 } | |
384 | |
150 // Make sure the next window is visible. | 385 // Make sure the next window is visible. |
151 showing_window_.reset(new ScopedShowWindow); | 386 showing_window_.reset(new ScopedShowWindow); |
152 showing_window_->Show(windows_[current_index_]); | 387 showing_window_->Show(windows_[current_index_]); |
153 } | 388 } |
154 | 389 |
155 void WindowCycleList::OnWindowDestroying(WmWindow* window) { | 390 void WindowCycleList::OnWindowDestroying(WmWindow* window) { |
156 window->RemoveObserver(this); | 391 window->RemoveObserver(this); |
157 | 392 |
158 WindowList::iterator i = std::find(windows_.begin(), windows_.end(), window); | 393 WindowList::iterator i = std::find(windows_.begin(), windows_.end(), window); |
159 // TODO(oshima): Change this back to DCHECK once crbug.com/483491 is fixed. | 394 // TODO(oshima): Change this back to DCHECK once crbug.com/483491 is fixed. |
160 CHECK(i != windows_.end()); | 395 CHECK(i != windows_.end()); |
161 int removed_index = static_cast<int>(i - windows_.begin()); | 396 int removed_index = static_cast<int>(i - windows_.begin()); |
162 windows_.erase(i); | 397 windows_.erase(i); |
163 if (current_index_ > removed_index || | 398 if (current_index_ > removed_index || |
164 current_index_ == static_cast<int>(windows_.size())) { | 399 current_index_ == static_cast<int>(windows_.size())) { |
165 current_index_--; | 400 current_index_--; |
166 } | 401 } |
402 | |
403 if (cycle_view_) { | |
404 WmWindow* new_target_window = | |
405 windows_.empty() ? nullptr : windows_[current_index_]; | |
406 cycle_view_->HandleWindowDestruction(window, new_target_window); | |
407 if (windows_.empty()) { | |
408 // This deletes us. | |
409 Shell::GetInstance()->window_cycle_controller()->StopCycling(); | |
410 return; | |
411 } | |
412 } | |
413 } | |
414 | |
415 bool WindowCycleList::ShouldShowUi() { | |
416 return windows_.size() > 1 && | |
417 base::CommandLine::ForCurrentProcess()->HasSwitch( | |
418 switches::kAshEnableWindowCycleUi); | |
167 } | 419 } |
168 | 420 |
169 } // namespace ash | 421 } // namespace ash |
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