| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ash/wm/screen_dimmer.h" |
| |
| #include "ash/public/cpp/shell_window_ids.h" |
| #include "ash/shell.h" |
| #include "ash/window_user_data.h" |
| #include "ash/wm/container_finder.h" |
| #include "ash/wm/window_dimmer.h" |
| #include "ui/aura/window.h" |
| |
| namespace ash { |
| namespace { |
| |
| // Opacity when it's dimming the entire screen. |
| constexpr float kDimmingLayerOpacityForRoot = 0.4f; |
| |
| } // namespace |
| |
| ScreenDimmer::ScreenDimmer() |
| : window_dimmers_(std::make_unique<WindowUserData<WindowDimmer>>()) { |
| Shell::Get()->AddShellObserver(this); |
| } |
| |
| ScreenDimmer::~ScreenDimmer() { |
| // Usage in chrome results in ScreenDimmer outliving the shell. |
| if (Shell::HasInstance()) |
| Shell::Get()->RemoveShellObserver(this); |
| } |
| |
| void ScreenDimmer::SetDimming(bool should_dim) { |
| if (should_dim == is_dimming_) |
| return; |
| is_dimming_ = should_dim; |
| |
| Update(should_dim); |
| } |
| |
| void ScreenDimmer::OnRootWindowAdded(aura::Window* root_window) { |
| Update(is_dimming_); |
| } |
| |
| void ScreenDimmer::Update(bool should_dim) { |
| for (aura::Window* container : Shell::GetAllRootWindows()) { |
| WindowDimmer* window_dimmer = window_dimmers_->Get(container); |
| if (should_dim) { |
| if (!window_dimmer) { |
| window_dimmers_->Set(container, |
| std::make_unique<WindowDimmer>(container)); |
| window_dimmer = window_dimmers_->Get(container); |
| window_dimmer->SetDimOpacity(kDimmingLayerOpacityForRoot); |
| } |
| if (at_bottom_) |
| container->StackChildAtBottom(window_dimmer->window()); |
| else |
| container->StackChildAtTop(window_dimmer->window()); |
| window_dimmer->window()->Show(); |
| } else if (window_dimmer) { |
| window_dimmers_->Set(container, nullptr); |
| } |
| } |
| } |
| |
| } // namespace ash |