/*
 * Copyright (c) 2021-2023 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.
 */

/**
 * @file
 * @kit ArkUI
 */

/**
 * Content scroll direction.
 *
 * @enum { number }
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Content scroll direction.
 *
 * @enum { number }
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Content scroll direction.
 *
 * @enum { number }
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare enum ScrollDirection {
  /**
   * Vertical scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Vertical scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Vertical scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  Vertical,

  /**
   * Horizontal scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Horizontal scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Horizontal scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  Horizontal,

  /**
   * Free scrolling is supported.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   */
  Free,

  /**
   * Non-scrollable.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Non-scrollable.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Non-scrollable.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  None,
}

/**
 * ScrollAlign.
 *
 * @enum { number } ScrollAlign
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * ScrollAlign.
 *
 * @enum { number } ScrollAlign
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare enum ScrollAlign {
  /**
   * Start position alignment.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Start position alignment.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  START,

  /**
   * Center alignment.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Center alignment.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  CENTER,

  /**
   * End position alignment.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * End position alignment.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  END,

  /**
   * Scroll the minimum distance to fully display the specified item.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Scroll the minimum distance to fully display the specified item.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  AUTO,
}

/**
 * OffsetResult info.
 *
 * @interface OffsetResult
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare interface OffsetResult {
  /**
   * The X-axis offset.
   *
   * @type { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  xOffset: number;

  /**
   * The y-axis offset.
   *
   * @type { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  yOffset: number;
}

/**
 * Define scroll edge options
 *
 * @interface ScrollEdgeOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 12
 */
declare interface ScrollEdgeOptions {
  /**
   * The fasten speed of scrolling to the edge, unit is vp/s.
   *
   * @type { ?number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  velocity?: number;
}

/**
 * Define scrollToIndex options
 *
 * @interface ScrollToIndexOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 12
 */
declare interface ScrollToIndexOptions {
  /**
   * The extra offset of scrolling to the index, unit is vp.
   *
   * @type { ?LengthMetrics }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  extraOffset?: LengthMetrics;
}

/**
 * Provides custom animation parameters.
 *
 * @interface ScrollAnimationOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 12
 */
declare interface ScrollAnimationOptions {
  /**
   * Set the duration of the animation.
   *
   * @type { ?number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  duration?: number;

  /**
   * Set the curve of the animation.
   *
   * @type { ?(Curve | ICurve) }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  curve?: Curve | ICurve;

  /**
   * Set whether the animation can over the boundary.
   *
   * @type { ?boolean }
   * @default false
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  canOverScroll?: boolean;
}

/**
 * OffsetOptions info.
 *
 * @interface OffsetOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 12
 */
declare interface OffsetOptions {
  /**
   * The X-axis offset.
   *
   * @type { ?Dimension }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  xOffset?: Dimension;

  /**
   * The y-axis offset.
   *
   * @type { ?Dimension }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  yOffset?: Dimension;
}

/**
 * Scroller
 * 
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Scroller
 * 
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Scroller
 * 
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare class Scroller {
  /**
   * constructor.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * constructor.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * constructor.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  constructor();

  /**
   * Called when the setting slides to the specified position.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the setting slides to the specified position.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the setting slides to the specified position.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when the setting slides to the specified position.
   * Anonymous Object Rectification.
   *
   * @param { ScrollOptions } options - scroll options
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  scrollTo(options: ScrollOptions);

  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { Edge } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { Edge } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { Edge } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { Edge } value - Edge type of the container.
   * @param { ScrollEdgeOptions } [options] - Options of scrolling to edge.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  scrollEdge(value: Edge, options?: ScrollEdgeOptions);


  /**
   * Fling the scroll view.
   *
   * @param { number } velocity - initial velocity of fling, in vp/s.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 
   * <br> 1. Mandatory parameters are left unspecified.
   * <br> 2. Incorrect parameters types.
   * <br> 3. Parameter verification failed.
   * @throws { BusinessError } 100004 - Controller not bound to component.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  fling(velocity: number): void;

  /**
   * Called when page turning mode is set.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Called when page turning mode is set.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when page turning mode is set.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when page turning mode is set.
   *
   * @param { ScrollPageOptions } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 14
   */
  scrollPage(value: ScrollPageOptions);

  /**
   * Called when page turning mode is set.
   *
   * @param { object } value
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   */
  scrollPage(value: { next: boolean; direction?: Axis });

  /**
   * Called when viewing the scroll offset.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when viewing the scroll offset.
   *
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when viewing the scroll offset.
   *
   * @returns { OffsetResult } Returns the current scrolling offset. If the scroller not bound to a component, the return value is void.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  currentOffset() : OffsetResult;

  /**
   * Called when sliding to the specified index.
   *
   * @param { number } value
   * @param { boolean } smooth
   * @param { ScrollAlign } align
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when sliding to the specified index.
   *
   * @param { number } value - Index to jump to.
   * @param { boolean } smooth - If true, scroll to index item with animation. If false, scroll to index item without animation.
   * @param { ScrollAlign } align - Sets the alignment mode of a specified index.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when sliding to the specified index.
   *
   * @param { number } value - Index to jump to.
   * @param { boolean } smooth - If true, scroll to index item with animation. If false, scroll to index item without animation.
   * @param { ScrollAlign } align - Sets the alignment mode of a specified index.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Scroll to the specified index.
   *
   * @param { number } value - Index to jump to.
   * @param { boolean } [smooth] - If true, scroll to index item with animation. If false, scroll to index item without animation.
   * @param { ScrollAlign } [align] - Sets the alignment mode of a specified index.
   * @param { ScrollToIndexOptions } [options] - Sets the options of a specified index, such as extra offset.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  scrollToIndex(value: number, smooth?: boolean, align?: ScrollAlign, options?: ScrollToIndexOptions);

  /**
   * Called when the setting slides by offset.
   *
   * @param { Length } dx
   * @param { Length } dy
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Called when the setting slides by offset.
   *
   * @param { Length } dx
   * @param { Length } dy
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the setting slides by offset.
   *
   * @param { Length } dx
   * @param { Length } dy
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  scrollBy(dx: Length, dy: Length);

  /**
   * Indicates whether the component scrolls to the end position.
   *
   * @returns { boolean } Returns whether the component scrolls to the end position.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Indicates whether the component scrolls to the end position.
   *
   * @returns { boolean } Returns whether the component scrolls to the end position.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  isAtEnd(): boolean;

  /**
   * Get child item size and position.
   *
   * @param { number } index - Index of the item.
   * @returns { RectResult } Returns the size and position.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 
   * <br> 1. Mandatory parameters are left unspecified.
   * <br> 2. Incorrect parameters types.
   * <br> 3. Parameter verification failed.
   * @throws { BusinessError } 100004 - Controller not bound to component.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 11
   */
  /**
   * Get child item size and position.
   *
   * @param { number } index - Index of the item.
   * @returns { RectResult } Returns the size and position.
   * @throws { BusinessError } 401 - Parameter error. Possible causes: 
   * <br> 1. Mandatory parameters are left unspecified.
   * <br> 2. Incorrect parameters types.
   * <br> 3. Parameter verification failed.
   * @throws { BusinessError } 100004 - Controller not bound to component.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  getItemRect(index: number): RectResult;

  /**
   * Get item index by position.
   *
   * @param { number } x - X coordinate relative to the upper left corner of the current component's original area, in vp.
   * @param { number } y - Y coordinate relative to the upper left corner of the current component's original area, in vp.
   * @returns { number } Index of the item.
   * @throws { BusinessError } 401 - Parameter error. Possible causes:
   * <br> 1. Mandatory parameters are left unspecified.
   * <br> 2. Incorrect parameters types.
   * <br> 3. Parameter verification failed.
   * @throws { BusinessError } 100004 - The controller not bound to component.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 14
   */
  getItemIndex(x: number, y: number): number;
}

/**
 * Define scroll page options
 * @interface ScrollPageOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @atomicservice
 * @since 14
 */
declare interface ScrollPageOptions {
  /**
   * Control whether to scroll to the next page or the previous page.
   *
   * @type { boolean }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 14
   */
  next: boolean;

  /**
   * Set whether the scrollPage have animate.
   *
   * @type { ?boolean }
   * @default false
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 14
   */
  animation?: boolean;
}

/**
 * Define scroll options.
 *
 * @interface ScrollOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 18
 */
declare interface ScrollOptions {
  /**
   * The X-axis offset.
   *
   * @type { number | string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * The X-axis offset.
   *
   * @type { number | string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * The X-axis offset.
   * Anonymous Object Rectification.
   *
   * @type { number | string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  xOffset: number | string;

  /**
   * The Y-axis offset.
   *
   * @type { number | string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * The Y-axis offset.
   *
   * @type { number | string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * The Y-axis offset.
   * Anonymous Object Rectification.
   *
   * @type { number | string }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  yOffset: number | string;

  /**
   * Descriptive animation.
   *
   * @type { ?({ duration?: number; curve?: Curve | ICurve } | boolean) } The object type provides custom animation parameters
   * and the boolean type enables default spring animation.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Descriptive animation.
   *
   * @type { ?({ duration?: number; curve?: Curve | ICurve } | boolean) } The object type provides custom animation parameters
   * and the boolean type enables default spring animation.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Descriptive animation.
   *
   * @type { ?( ScrollAnimationOptions | boolean) } The ScrollAnimationOptions type provides custom animation parameters
   * and the boolean type enables default spring animation.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  /**
   * Descriptive animation.
   * Anonymous Object Rectification.
   *
   * @type { ?( ScrollAnimationOptions | boolean) } The ScrollAnimationOptions type provides custom animation parameters
   * and the boolean type enables default spring animation.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  animation?: ScrollAnimationOptions | boolean;
}

/**
 * Define scroll snap options
 * 
 * @interface ScrollSnapOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 10
 */
/**
 * Define scroll snap options
 * 
 * @interface ScrollSnapOptions
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @atomicservice
 * @since 11
 */
declare interface ScrollSnapOptions {
  /**
   * Set scroll snap alignment.
   *
   * @type { ScrollSnapAlign }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 10
   */
  /**
   * Set scroll snap alignment.
   *
   * @type { ScrollSnapAlign }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @atomicservice
   * @since 11
   */
  snapAlign: ScrollSnapAlign;

  /**
   * Set snap positions. When the type of snapPositions is Dimension, Scroll content is paginated by an integer
   * multiple of snapPositions. When the type of snapPositions is Array<number>, Scroll content is paginated based
   * on the array of snapPositions.
   *
   * @type { ?(Dimension | Array<Dimension>) }
   * @default 100%
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 10
   */
  /**
   * Set snap positions. When the type of snapPositions is Dimension, Scroll content is paginated by an integer
   * multiple of snapPositions. When the type of snapPositions is Array<number>, Scroll content is paginated based
   * on the array of snapPositions.
   *
   * @type { ?(Dimension | Array<Dimension>) }
   * @default 100%
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @atomicservice
   * @since 11
   */
  snapPagination?: Dimension | Array<Dimension>;

  /**
   * Set whether the beginning of the Scroll content counts an a snap.
   *
   * @type { ?boolean }
   * @default true
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 10
   */
  /**
   * Set whether the beginning of the Scroll content counts an a snap.
   *
   * @type { ?boolean }
   * @default true
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @atomicservice
   * @since 11
   */
  enableSnapToStart?: boolean;

  /**
   * Set whether the end of the Scroll content counts an a snap.
   *
   * @type { ?boolean }
   * @default true
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 10
   */
  /**
   * Set whether the end of the Scroll content counts an a snap.
   *
   * @type { ?boolean }
   * @default true
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @atomicservice
   * @since 11
   */
  enableSnapToEnd?: boolean;
}

/**
 * Provides interfaces for scrollable containers.
 *
 * @interface ScrollInterface
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Provides interfaces for scrollable containers.
 *
 * @interface ScrollInterface
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Provides interfaces for scrollable containers.
 *
 * @interface ScrollInterface
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
interface ScrollInterface {
  /**
   * Called when a scrollable container is set.
   *
   * @param { Scroller } scroller
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when a scrollable container is set.
   *
   * @param { Scroller } scroller
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when a scrollable container is set.
   *
   * @param { Scroller } scroller
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  (scroller?: Scroller): ScrollAttribute;
}

/**
 * Defines a Scroll onScrollEdge callback.
 *
 * @typedef { function } OnScrollEdgeCallback
 * @param { Edge } side - the edge position scrolled to
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 18
 */
declare type OnScrollEdgeCallback = (side: Edge) => void;

/**
 * The data returned by the event handler when onScrollFrameBegin.
 *
 * @interface OnScrollFrameBeginHandlerResult
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 18
 */
interface OnScrollFrameBeginHandlerResult {
  /**
   * Actual sliding amount, unit vp.
   *
   * @type { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Actual sliding amount, unit vp.
   *
   * @type { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Actual sliding amount, unit vp.
   *
   * @type { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Actual sliding amount, unit vp.
   * Anonymous Object Rectification.
   *
   * @type { number }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  offsetRemain: number;
}

/**
 * Defines a Scroll onScrollFrameBegin callback.
 *
 * @typedef { function } OnScrollFrameBeginCallback
 * @param { number } offset - The upcoming sliding amount, unit vp
 * @param { ScrollState } state - current sliding status
 * @returns { OnScrollFrameBeginHandlerResult } data - the scroll data return by handler
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 18
 */
declare type OnScrollFrameBeginCallback = (offset: number, state: ScrollState) => OnScrollFrameBeginHandlerResult;

/**
 * Defines the scroll attribute functions.
 *
 * @extends CommonMethod<ScrollAttribute>
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Defines the scroll attribute functions.
 *
 * @extends CommonMethod<ScrollAttribute>
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Defines the scroll attribute functions.
 *
 * @extends ScrollableCommonMethod<ScrollAttribute>
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare class ScrollAttribute extends ScrollableCommonMethod<ScrollAttribute> {
  /**
   * Called when the scroll method is slid.
   *
   * @param { ScrollDirection } value
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the scroll method is slid.
   *
   * @param { ScrollDirection } value
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the scroll method is slid.
   *
   * @param { ScrollDirection } value
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  scrollable(value: ScrollDirection): ScrollAttribute;

  /**
   * Called when the setting slides to the specified position.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the setting slides to the specified position.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the setting slides to the specified position.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   * @deprecated since 12
   * @useinstead scroll/Scroll#onWillScroll
   * 
   */
  onScroll(event: (xOffset: number, yOffset: number) => void): ScrollAttribute;

  /**
   * Called when the Scroll will scroll.
   *
   * @param { ScrollOnWillScrollCallback } handler - callback of Scroll
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  onWillScroll(handler: ScrollOnWillScrollCallback): ScrollAttribute;

  /**
   * Called when the Scroll did scroll.
   *
   * @param { ScrollOnScrollCallback } handler - callback of Scroll,
   * xOffset and yOffset are offsets this frame did scroll, scrollState is current scroll state.
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  onDidScroll(handler: ScrollOnScrollCallback): ScrollAttribute;

  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when scrolling to the edge of the container.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when scrolling to the edge of the container.
   * Anonymous Object Rectification.
   *
   * @param { OnScrollEdgeCallback } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  onScrollEdge(event: OnScrollEdgeCallback): ScrollAttribute;

  /**
   * Called when scrolling start.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Called when scrolling start.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when scrolling start.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when scrolling start.
   * Anonymous Object Rectification.
   *
   * @param { VoidCallback } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  onScrollStart(event: VoidCallback): ScrollAttribute;

  /**
   * Called when scrolling has stopped.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   * @deprecated since 9
   * @useinstead scroll/Scroll#onScrollStop
   */
  onScrollEnd(event: () => void): ScrollAttribute;

  /**
   * Called when scrolling has stopped.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Called when scrolling has stopped.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when scrolling has stopped.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when scrolling has stopped.
   * Anonymous Object Rectification.
   *
   * @param { VoidCallback } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  onScrollStop(event: VoidCallback): ScrollAttribute;

  /**
   * Called when the status of the scroll bar is set.
   *
   * @param { BarState } barState
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the status of the scroll bar is set.
   *
   * @param { BarState } barState
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the status of the scroll bar is set.
   *
   * @param { BarState } barState
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  scrollBar(barState: BarState): ScrollAttribute;

  /**
   * Called when the color of the scroll bar is set.
   *
   * @param { Color | number | string } color
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the color of the scroll bar is set.
   *
   * @param { Color | number | string } color
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the color of the scroll bar is set.
   *
   * @param { Color | number | string } color
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  scrollBarColor(color: Color | number | string): ScrollAttribute;

  /**
   * Called when the width of the scroll bar is set.
   *
   * @param { number | string } value
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the width of the scroll bar is set.
   *
   * @param { number | string } value
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the width of the scroll bar is set.
   *
   * @param { number | string } value
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  scrollBarWidth(value: number | string): ScrollAttribute;

  /**
   * Called when the sliding effect is set.
   *
   * @param { EdgeEffect } edgeEffect
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 7
   */
  /**
   * Called when the sliding effect is set.
   *
   * @param { EdgeEffect } edgeEffect
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when the sliding effect is set.
   *
   * @param { EdgeEffect } edgeEffect
   * @param { EdgeEffectOptions } options
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  edgeEffect(edgeEffect: EdgeEffect, options?: EdgeEffectOptions): ScrollAttribute;

  /**
   * Called when scrolling begin each frame.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 9
   */
  /**
   * Called when scrolling begin each frame.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when scrolling begin each frame.
   *
   * @param { function } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  /**
   * Called when scrolling begin each frame.
   * Anonymous Object Rectification.
   *
   * @param { OnScrollFrameBeginCallback } event
   * @returns { ScrollAttribute }
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 18
   */
  onScrollFrameBegin(event: OnScrollFrameBeginCallback): ScrollAttribute;

  /**
   * Called to setting the nested scroll options.
   *
   * @param { NestedScrollOptions } value - options for nested scrolling.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 10
   */
  /**
   * Called to setting the nested scroll options.
   *
   * @param { NestedScrollOptions } value - options for nested scrolling.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  nestedScroll(value: NestedScrollOptions): ScrollAttribute;

  /**
   * Called when setting whether to enable scroll by gesture or mouse.
   *
   * @param { boolean } value
   * @returns { ScrollAttribute } The attribute of the scroll
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called when setting whether to enable scroll by gesture or mouse.
   *
   * @param { boolean } value
   * @returns { ScrollAttribute } The attribute of the scroll
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  enableScrollInteraction(value: boolean): ScrollAttribute;

  /**
   * Called to setting the friction.
   *
   * @param { number | Resource } value - options for scrolling friction.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 10
   */
  /**
   * Called to setting the friction.
   *
   * @param { number | Resource } value - options for scrolling friction.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 11
   */
  friction(value: number | Resource): ScrollAttribute;

  /**
   * Called to setting the scroll snap options.
   *
   * @param { ScrollSnapOptions } value - options for scroll snap.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @since 10
   */
  /**
   * Called to setting the scroll snap options.
   *
   * @param { ScrollSnapOptions } value - options for scroll snap.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @atomicservice
   * @since 11
   */
  scrollSnap(value: ScrollSnapOptions): ScrollAttribute;

  /**
   * Determines whether the scroll view stops on multiples of the content size when the user scrolls.
   *
   * @param { boolean } value - A boolean value determines whether paging is enabled for scroll.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @since 11
   */
  /**
   * Determines whether the scroll view stops on multiples of the content size when the user scrolls.
   *
   * @param { boolean } value - A boolean value determines whether paging is enabled for scroll.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  enablePaging(value: boolean): ScrollAttribute;
  
  /**
   * Called to setting the initial offset
   *
   * @param { OffsetOptions } value - options for scroll initial offset.
   * @returns { ScrollAttribute } the attribute of the scroll.
   * @syscap SystemCapability.ArkUI.ArkUI.Full
   * @crossplatform
   * @atomicservice
   * @since 12
   */
  initialOffset(value: OffsetOptions): ScrollAttribute;
}

/**
 * callback of Scroll, using in onDidScroll.
 * 
 * @typedef { function } ScrollOnScrollCallback
 * @param { number } xOffset - horizontal offset this frame did scroll.
 * @param { number } yOffset - vertical offset this frame did scroll.
 * @param { ScrollState } scrollState - current scroll state.
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 12
 */
declare type ScrollOnScrollCallback = (xOffset: number, yOffset: number, scrollState: ScrollState) => void;

/**
  * Called before scroll to allow developer to control real offset the Scroll can scroll.
  *
  * @typedef { function } ScrollOnWillScrollCallback
  * @param { number } xOffset - horizontal offset this frame will scroll, which may or may not be reached.
  * @param { number } yOffset - vertical offset this frame will scroll, which may or may not be reached.
  * @param { ScrollState } scrollState - current scroll state.
  * @param { ScrollSource } scrollSource - source of current scroll.
  * @returns { void | OffsetResult } the remain offset for the Scroll, 
  *     same as (xOffset, yOffset) when no OffsetResult is returned.
  * @syscap SystemCapability.ArkUI.ArkUI.Full
  * @crossplatform
  * @atomicservice
  * @since 12
  */
declare type ScrollOnWillScrollCallback =
 (xOffset: number, yOffset: number, scrollState: ScrollState, scrollSource: ScrollSource) => void | OffsetResult;

/**
 * Defines Scroll Component.
 *
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Defines Scroll Component.
 *
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Defines Scroll Component.
 *
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare const Scroll: ScrollInterface;

/**
 * Defines Scroll Component instance.
 *
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @since 7
 */
/**
 * Defines Scroll Component instance.
 *
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @since 10
 */
/**
 * Defines Scroll Component instance.
 *
 * @syscap SystemCapability.ArkUI.ArkUI.Full
 * @crossplatform
 * @atomicservice
 * @since 11
 */
declare const ScrollInstance: ScrollAttribute;