| // Copyright 2020 The Fuchsia 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 SRC_UI_A11Y_LIB_SCREEN_READER_LINEAR_NAVIGATION_ACTION_H_ |
| #define SRC_UI_A11Y_LIB_SCREEN_READER_LINEAR_NAVIGATION_ACTION_H_ |
| |
| #include <lib/fpromise/scope.h> |
| |
| #include "src/ui/a11y/lib/screen_reader/screen_reader_action.h" |
| |
| namespace a11y { |
| |
| // The LinearNavigationAction allows users to navigate in the UI forward and backwards (AKA the next |
| // / previous element). |
| class LinearNavigationAction : public ScreenReaderAction { |
| public: |
| // The direction of the action when navigating. |
| enum LinearNavigationDirection { kNextAction, kPreviousAction }; |
| |
| explicit LinearNavigationAction(ActionContext* action_context, |
| ScreenReaderContext* screen_reader_context, |
| LinearNavigationDirection action_type); |
| |
| ~LinearNavigationAction() override; |
| |
| // Invokes the linear navigation action, navigating to the node following |direction_| to select |
| // next / previous. |
| void Run(a11y::gesture_util_v2::GestureContext gesture_context) override; |
| |
| private: |
| // Direction of the linear navigation. |
| LinearNavigationDirection direction_; |
| fpromise::scope scope_; |
| }; |
| } // namespace a11y |
| |
| #endif // SRC_UI_A11Y_LIB_SCREEN_READER_LINEAR_NAVIGATION_ACTION_H_ |