| // 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_THREE_FINGER_SWIPE_ACTION_H_ |
| #define SRC_UI_A11Y_LIB_SCREEN_READER_THREE_FINGER_SWIPE_ACTION_H_ |
| |
| #include <fuchsia/accessibility/gesture/cpp/fidl.h> |
| #include <lib/fpromise/scope.h> |
| |
| #include "src/ui/a11y/lib/gesture_manager/gesture_listener_registry.h" |
| #include "src/ui/a11y/lib/screen_reader/screen_reader_action.h" |
| |
| namespace a11y { |
| // This class implements three finger swipe action. |
| // Responsibilities of three finger swipe Action is: |
| // * Calls OnGesture() for |gesture_type_| on the Gesture listener. |
| // As part of the callback from OnGesture() if an utterance is returned then call TTS to speak. |
| // This Action is different than 1 Finger swipe, since it uses GestureListener to complete the |
| // action. |
| class ThreeFingerSwipeAction : public ScreenReaderAction { |
| public: |
| // |action_context| and |screen_reader_context| are expected to be be initialized and they must |
| // outlive this class. This class doesn't take ownership of the pointers which are passed. |
| ThreeFingerSwipeAction(ActionContext* action_context, ScreenReaderContext* screen_reader_context, |
| GestureListenerRegistry* gesture_listener_registry, |
| fuchsia::accessibility::gesture::Type gesture_type); |
| ~ThreeFingerSwipeAction() override; |
| |
| // This method implements the actual sequence of events that should |
| // happens when an associated gesture is performed on an element. |
| void Run(a11y::gesture_util_v2::GestureContext gesture_context) override; |
| |
| private: |
| // Pointer to Gesture Listener Registry. |
| GestureListenerRegistry* gesture_listener_registry_; |
| |
| // Stores which swipe action is being handled. |
| fuchsia::accessibility::gesture::Type gesture_type_; |
| |
| fpromise::scope scope_; |
| }; |
| |
| } // namespace a11y |
| |
| #endif // SRC_UI_A11Y_LIB_SCREEN_READER_THREE_FINGER_SWIPE_ACTION_H_ |