/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/** Horizontal dimension of a connection point on the perimeter of the origin or overlay element. */
import { Optional } from '@angular/core';
/** The points of the origin element and the overlay element to connect. */
export class ConnectionPositionPair {
    constructor(origin, overlay, 
    /** Offset along the X axis. */
    offsetX, 
    /** Offset along the Y axis. */
    offsetY, 
    /** Class(es) to be applied to the panel while this position is active. */
    panelClass) {
        this.offsetX = offsetX;
        this.offsetY = offsetY;
        this.panelClass = panelClass;
        this.originX = origin.originX;
        this.originY = origin.originY;
        this.overlayX = overlay.overlayX;
        this.overlayY = overlay.overlayY;
    }
}
/**
 * Set of properties regarding the position of the origin and overlay relative to the viewport
 * with respect to the containing Scrollable elements.
 *
 * The overlay and origin are clipped if any part of their bounding client rectangle exceeds the
 * bounds of any one of the strategy's Scrollable's bounding client rectangle.
 *
 * The overlay and origin are outside view if there is no overlap between their bounding client
 * rectangle and any one of the strategy's Scrollable's bounding client rectangle.
 *
 *       -----------                    -----------
 *       | outside |                    | clipped |
 *       |  view   |              --------------------------
 *       |         |              |     |         |        |
 *       ----------               |     -----------        |
 *  --------------------------    |                        |
 *  |                        |    |      Scrollable        |
 *  |                        |    |                        |
 *  |                        |     --------------------------
 *  |      Scrollable        |
 *  |                        |
 *  --------------------------
 *
 *  @docs-private
 */
export class ScrollingVisibility {
}
/** The change event emitted by the strategy when a fallback position is used. */
export class ConnectedOverlayPositionChange {
    constructor(
    /** The position used as a result of this change. */
    connectionPair, 
    /** @docs-private */
    scrollableViewProperties) {
        this.connectionPair = connectionPair;
        this.scrollableViewProperties = scrollableViewProperties;
    }
}
ConnectedOverlayPositionChange.ctorParameters = () => [
    { type: ConnectionPositionPair },
    { type: ScrollingVisibility, decorators: [{ type: Optional }] }
];
/**
 * Validates whether a vertical position property matches the expected values.
 * @param property Name of the property being validated.
 * @param value Value of the property being validated.
 * @docs-private
 */
export function validateVerticalPosition(property, value) {
    if (value !== 'top' && value !== 'bottom' && value !== 'center') {
        throw Error(`ConnectedPosition: Invalid ${property} "${value}". ` +
            `Expected "top", "bottom" or "center".`);
    }
}
/**
 * Validates whether a horizontal position property matches the expected values.
 * @param property Name of the property being validated.
 * @param value Value of the property being validated.
 * @docs-private
 */
export function validateHorizontalPosition(property, value) {
    if (value !== 'start' && value !== 'end' && value !== 'center') {
        throw Error(`ConnectedPosition: Invalid ${property} "${value}". ` +
            `Expected "start", "end" or "center".`);
    }
}
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Can be 'start', 'end', or 'center'. */\n  originX: HorizontalConnectionPos;\n  /** Y-axis attachment point for connected overlay origin. Can be 'top', 'bottom', or 'center'. */\n  originY: VerticalConnectionPos;\n  /** X-axis attachment point for connected overlay. Can be 'start', 'end', or 'center'. */\n  overlayX: HorizontalConnectionPos;\n  /** Y-axis attachment point for connected overlay. Can be 'top', 'bottom', or 'center'. */\n  overlayY: VerticalConnectionPos;\n\n  constructor(\n    origin: OriginConnectionPosition,\n    overlay: OverlayConnectionPosition,\n    /** Offset along the X axis. */\n    public offsetX?: number,\n    /** Offset along the Y axis. */\n    public offsetY?: number,\n    /** Class(es) to be applied to the panel while this position is active. */\n    public panelClass?: string | string[]) {\n\n    this.originX = origin.originX;\n    this.originY = origin.originY;\n    this.overlayX = overlay.overlayX;\n    this.overlayY = overlay.overlayY;\n  }\n}\n\n/**\n * Set of properties regarding the position of the origin and overlay relative to the viewport\n * with respect to the containing Scrollable elements.\n *\n * The overlay and origin are clipped if any part of their bounding client rectangle exceeds the\n * bounds of any one of the strategy's Scrollable's bounding client rectangle.\n *\n * The overlay and origin are outside view if there is no overlap between their bounding client\n * rectangle and any one of the strategy's Scrollable's bounding client rectangle.\n *\n *       -----------                    -----------\n *       | outside |                    | clipped |\n *       |  view   |              --------------------------\n *       |         |              |     |         |        |\n *       ----------               |     -----------        |\n *  --------------------------    |                        |\n *  |                        |    |      Scrollable        |\n *  |                        |    |                        |\n *  |                        |     --------------------------\n *  |      Scrollable        |\n *  |                        |\n *  --------------------------\n *\n *  @docs-private\n */\nexport class ScrollingVisibility {\n  isOriginClipped: boolean;\n  isOriginOutsideView: boolean;\n  isOverlayClipped: boolean;\n  isOverlayOutsideView: boolean;\n}\n\n/** The change event emitted by the strategy when a fallback position is used. */\nexport class ConnectedOverlayPositionChange {\n  constructor(\n      /** The position used as a result of this change. */\n      public connectionPair: ConnectionPositionPair,\n      /** @docs-private */\n      @Optional() public scrollableViewProperties: ScrollingVisibility) {}\n}\n\n/**\n * Validates whether a vertical position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nexport function validateVerticalPosition(property: string, value: VerticalConnectionPos) {\n  if (value !== 'top' && value !== 'bottom' && value !== 'center') {\n    throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n                `Expected \"top\", \"bottom\" or \"center\".`);\n  }\n}\n\n/**\n * Validates whether a horizontal position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nexport function validateHorizontalPosition(property: string, value: HorizontalConnectionPos) {\n  if (value !== 'start' && value !== 'end' && value !== 'center') {\n    throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n                `Expected \"start\", \"end\" or \"center\".`);\n  }\n}\n"]}