| // 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_HIGHLIGHT_CONTROLLER_H_ |
| #define ASH_ACCESSIBILITY_ACCESSIBILITY_HIGHLIGHT_CONTROLLER_H_ |
| |
| #include "ash/ash_export.h" |
| #include "base/macros.h" |
| #include "ui/aura/client/cursor_client_observer.h" |
| #include "ui/base/ime/input_method_observer.h" |
| #include "ui/events/event_handler.h" |
| #include "ui/gfx/geometry/point.h" |
| #include "ui/gfx/geometry/rect.h" |
| |
| namespace ui { |
| class KeyEvent; |
| class InputMethod; |
| class MouseEvent; |
| class TextInputClient; |
| } // namespace ui |
| |
| namespace ash { |
| |
| // Controls visual highlights that Chrome OS can draw around the focused object, |
| // the cursor, and the text caret for accessibility. |
| class ASH_EXPORT AccessibilityHighlightController |
| : public ui::EventHandler, |
| public ui::InputMethodObserver, |
| public aura::client::CursorClientObserver { |
| public: |
| AccessibilityHighlightController(); |
| ~AccessibilityHighlightController() override; |
| |
| void HighlightFocus(bool focus); |
| void HighlightCursor(bool cursor); |
| void HighlightCaret(bool caret); |
| void SetFocusHighlightRect(const gfx::Rect& bounds_in_screen); |
| |
| // Updates the visual highlight position for the text input caret. Removes |
| // the highlight if the caret is not visible. |
| void SetCaretBounds(const gfx::Rect& caret_bounds_in_screen); |
| |
| // ui::EventHandler: |
| void OnMouseEvent(ui::MouseEvent* event) override; |
| void OnKeyEvent(ui::KeyEvent* event) override; |
| |
| // ui::InputMethodObserver: |
| void OnFocus() override {} |
| void OnBlur() override {} |
| void OnInputMethodDestroyed(const ui::InputMethod* input_method) override {} |
| void OnShowVirtualKeyboardIfEnabled() override {} |
| void OnTextInputStateChanged(const ui::TextInputClient* client) override; |
| void OnCaretBoundsChanged(const ui::TextInputClient* client) override; |
| |
| // aura::client::CursorClientObserver: |
| void OnCursorVisibilityChanged(bool is_visible) override; |
| |
| private: |
| bool IsCursorVisible(); |
| bool IsCaretVisible(const gfx::Rect& caret_bounds_in_screen); |
| void UpdateFocusAndCaretHighlights(); |
| void UpdateCursorHighlight(); |
| |
| bool focus_ = false; |
| gfx::Rect focus_rect_; |
| |
| bool cursor_ = false; |
| gfx::Point cursor_point_; |
| |
| bool caret_ = false; |
| bool caret_visible_ = false; |
| gfx::Point caret_point_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AccessibilityHighlightController); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_ACCESSIBILITY_ACCESSIBILITY_HIGHLIGHT_CONTROLLER_H_ |