xref: /foundation/barrierfree/accessibility/interfaces/kits/js/@ohos.application.AccessibilityExtensionAbility.d.ts

/*
 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License"),
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import type accessibility from './@ohos.accessibility';
import type { KeyEvent } from './@ohos.multimodalInput.keyEvent';
import type {
  AccessibilityElement as _AccessibilityElement,
  ElementAttributeValues as _ElementAttributeValues,
  FocusDirection as _FocusDirection,
  FocusType as _FocusType,
  WindowType as _WindowType,
  Rect as _Rect,
  Span as _Span,
} from './application/AccessibilityExtensionContext';
import type * as _AccessibilityExtensionContext from './application/AccessibilityExtensionContext';


/**
 * Indicates an accessibility element.
 * Supports querying element attributes, requesting execution actions, and finding child elements by condition.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type AccessibilityElement = _AccessibilityElement;

/**
 * Indicates the possible attributes of the element and the type of the attribute value.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type ElementAttributeValues = _ElementAttributeValues;

/**
 * Indicates the direction of the search focus.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type FocusDirection = _FocusDirection;

/**
 * Indicates the key of the attribute value.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type ElementAttributeKeys = keyof ElementAttributeValues;

/**
 * Indicates the type of the focus.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type FocusType = _FocusType;

/**
 * Indicates the type of the window.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type WindowType = _WindowType;

/**
 * Indicates rectangle.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */
export type Rect = _Rect;

/**
 * Indicates rectangle.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 12
 */
export type Span = _Span;

/**
 * The accessibility extension context. Used to configure, query information, and inject gestures.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 10
 */

export type AccessibilityExtensionContext = _AccessibilityExtensionContext.default;

/**
 * class of accessibility extension ability.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 9
 */
export default class AccessibilityExtensionAbility {
  /**
   * Indicates accessibility extension ability context.
   *
   * @syscap SystemCapability.BarrierFree.Accessibility.Core
   * @since 9
   */
  context: AccessibilityExtensionContext;

  /**
   * Called when extension ability is connected.
   *
   * @syscap SystemCapability.BarrierFree.Accessibility.Core
   * @since 9
   */
  onConnect(): void;

  /**
   * Called when extension ability is disconnected.
   *
   * @syscap SystemCapability.BarrierFree.Accessibility.Core
   * @since 9
   */
  onDisconnect(): void;

  /**
   * Called when an accessibility event occurs, such as when the user touches the application interface.
   *
   * @param { AccessibilityEvent } event Indicates an accessibility event.
   * @syscap SystemCapability.BarrierFree.Accessibility.Core
   * @since 9
   */
  onAccessibilityEvent(event: AccessibilityEvent): void;

  /**
   * Called when a physical key is pressed, such as when the user presses the volume button .
   *
   * @param { KeyEvent } keyEvent Indicates the physical key event.
   * @returns { boolean }
   * @syscap SystemCapability.BarrierFree.Accessibility.Core
   * @since 9
   */
  onKeyEvent(keyEvent: KeyEvent): boolean;
}

/**
 * Indicates the accessibility event.
 * It provides the event type and the target element of the event if any.
 *
 * @typedef AccessibilityEvent
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 9
 */
declare interface AccessibilityEvent {
  eventType: accessibility.EventType | accessibility.WindowUpdateType | TouchGuideType | GestureType | PageUpdateType;
  target?: AccessibilityElement;
  timeStamp?: number;
  elementId?: number;
  textAnnouncedForAccessibility?: string;
}

/**
 * Indicates the gesture type.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 9
 */
type GestureType = 'left' | 'leftThenRight' | 'leftThenUp' | 'leftThenDown' |
  'right' | 'rightThenLeft' | 'rightThenUp' | 'rightThenDown' |
  'up' | 'upThenLeft' | 'upThenRight' | 'upThenDown' |
  'down' | 'downThenLeft' | 'downThenRight' | 'downThenUp' |
  'twoFingerSingleTap' | 'twoFingerDoubleTap' | 'twoFingerDoubleTapAndHold' | 'twoFingerTripleTap' |
  'twoFingerTripleTapAndHold' | 'threeFingerSingleTap' | 'threeFingerDoubleTap' | 'threeFingerDoubleTapAndHold' |
  'threeFingerTripleTap' | 'threeFingerTripleTapAndHold' | 'fourFingerSingleTap' | 'fourFingerDoubleTap' |
  'fourFingerDoubleTapAndHold' | 'fourFingerTripleTap' | 'fourFingerTripleTapAndHold' |
  'threeFingerSwipeUp' | 'threeFingerSwipeDown' | 'threeFingerSwipeLeft' | 'threeFingerSwipeRight' |
  'fourFingerSwipeUp' | 'fourFingerSwipeDown' | 'fourFingerSwipeLeft' | 'fourFingerSwipeRight';

/**
 * Indicates the page update type.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 9
 */
type PageUpdateType = 'pageContentUpdate' | 'pageStateUpdate';

/**
 * Indicates the type of touch event during touch browsing.
 *
 * @syscap SystemCapability.BarrierFree.Accessibility.Core
 * @since 9
 */
type TouchGuideType = 'touchBegin' | 'touchEnd';