| // Copyright 2018 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. |
| |
| #ifndef ASH_ACCESSIBILITY_ACCESSIBILITY_PANEL_LAYOUT_MANAGER_H_ |
| #define ASH_ACCESSIBILITY_ACCESSIBILITY_PANEL_LAYOUT_MANAGER_H_ |
| |
| #include "ash/ash_export.h" |
| #include "ash/public/interfaces/accessibility_controller.mojom.h" |
| #include "ash/shell_observer.h" |
| #include "base/macros.h" |
| #include "ui/aura/layout_manager.h" |
| #include "ui/display/display_observer.h" |
| #include "ui/gfx/geometry/rect.h" |
| #include "ui/wm/public/activation_change_observer.h" |
| |
| namespace aura { |
| class Window; |
| } |
| |
| namespace ash { |
| |
| // AccessibilityPanelLayoutManager manages the container window used for the |
| // ChromeVox spoken feedback panel, which sits at the top of the display. It |
| // insets the display work area bounds when ChromeVox is visible. The ChromeVox |
| // panel is created by Chrome because spoken feedback is implemented by an |
| // extension. Exported for test. |
| class ASH_EXPORT AccessibilityPanelLayoutManager |
| : public aura::LayoutManager, |
| public display::DisplayObserver, |
| public ::wm::ActivationChangeObserver, |
| public ash::ShellObserver { |
| public: |
| // Height of the panel in DIPs. Public for test. |
| static constexpr int kDefaultPanelHeight = 35; |
| |
| AccessibilityPanelLayoutManager(); |
| ~AccessibilityPanelLayoutManager() override; |
| |
| // Controls the panel's visibility and location. |
| void SetAlwaysVisible(bool always_visible); |
| void SetPanelBounds(const gfx::Rect& bounds, |
| mojom::AccessibilityPanelState state); |
| |
| // aura::LayoutManager: |
| void OnWindowResized() override {} |
| void OnWindowAddedToLayout(aura::Window* child) override; |
| void OnWillRemoveWindowFromLayout(aura::Window* child) override {} |
| void OnWindowRemovedFromLayout(aura::Window* child) override; |
| void OnChildWindowVisibilityChanged(aura::Window* child, |
| bool visible) override; |
| void SetChildBounds(aura::Window* child, |
| const gfx::Rect& requested_bounds) override; |
| |
| // DisplayObserver: |
| void OnDisplayAdded(const display::Display& new_display) override {} |
| void OnDisplayRemoved(const display::Display& old_display) override {} |
| void OnDisplayMetricsChanged(const display::Display& display, |
| uint32_t changed_metrics) override; |
| |
| // ::wm::ActivationChangeObserver: |
| void OnWindowActivated(ActivationReason reason, |
| aura::Window* gained_active, |
| aura::Window* lost_active) override; |
| |
| // ShellObserver: |
| void OnFullscreenStateChanged(bool is_fullscreen, |
| aura::Window* container) override; |
| |
| aura::Window* panel_window_for_test() { return panel_window_; } |
| |
| private: |
| // Updates the panel window bounds. |
| void UpdateWindowBounds(); |
| |
| // Sets cached height of the accessibility panel. |
| void UpdateWorkAreaForPanelHeight(); |
| |
| // The panel being managed (e.g. the ChromeVoxPanel's native aura window). |
| aura::Window* panel_window_ = nullptr; |
| |
| // Window bounds when not in fullscreen |
| gfx::Rect panel_bounds_ = gfx::Rect(0, 0, 0, 0); |
| |
| // Determines whether panel is hidden when browser is in fullscreen. |
| bool always_visible_ = false; |
| |
| // Determines how the panel_bounds_ are used when displaying the panel. |
| mojom::AccessibilityPanelState panel_state_ = |
| mojom::AccessibilityPanelState::BOUNDED; |
| |
| DISALLOW_COPY_AND_ASSIGN(AccessibilityPanelLayoutManager); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_ACCESSIBILITY_ACCESSIBILITY_PANEL_LAYOUT_MANAGER_H_ |