import { Directive } from '@angular/core';
import { Observable, fromEvent, merge, map, switchMap, takeUntil, tap } from 'rxjs';
import { stopPropagation } from './scrollbar/common';
import * as i0 from "@angular/core";
export class ScrollViewport {
    // Get viewport size, clientHeight or clientWidth
    get clientHeight() {
        return this.nativeElement.clientHeight;
    }
    get clientWidth() {
        return this.nativeElement.clientWidth;
    }
    get scrollHeight() {
        return this.nativeElement.scrollHeight;
    }
    get scrollWidth() {
        return this.nativeElement.scrollWidth;
    }
    // Get viewport scroll offset, scrollTop or scrollLeft
    get scrollTop() {
        return this.nativeElement.scrollTop;
    }
    get scrollLeft() {
        return this.nativeElement.scrollLeft;
    }
    // Get the available scrollable size
    get scrollMaxX() {
        return this.scrollWidth - this.clientWidth;
    }
    get scrollMaxY() {
        return this.scrollHeight - this.clientHeight;
    }
    get contentHeight() {
        return this.contentWrapperElement?.clientHeight || 0;
    }
    get contentWidth() {
        return this.contentWrapperElement?.clientWidth || 0;
    }
    constructor(viewPort) {
        this.viewPort = viewPort;
        this.nativeElement = viewPort.nativeElement;
    }
    /**
     * Activate viewport pointer events such as 'hovered' and 'clicked' events
     */
    activatePointerEvents(propagate, destroyed) {
        this.hovered = new Observable((subscriber) => {
            // Stream that emits when pointer is moved over the viewport (used to set the hovered state)
            const mouseMoveStream = fromEvent(this.nativeElement, 'mousemove', { passive: true });
            const mouseMove = propagate ? mouseMoveStream : mouseMoveStream.pipe(stopPropagation());
            // Stream that emits when pointer leaves the viewport (used to remove the hovered state)
            const mouseLeave = fromEvent(this.nativeElement, 'mouseleave', { passive: true }).pipe(map(() => false));
            merge(mouseMove, mouseLeave).pipe(tap((e) => subscriber.next(e)), takeUntil(destroyed)).subscribe();
        });
        this.clicked = new Observable((subscriber) => {
            const mouseDown = fromEvent(this.nativeElement, 'mousedown', { passive: true }).pipe(tap((e) => subscriber.next(e)));
            const mouseUp = fromEvent(this.nativeElement, 'mouseup', { passive: true }).pipe(tap(() => subscriber.next(false)));
            mouseDown.pipe(switchMap(() => mouseUp), takeUntil(destroyed)).subscribe();
        });
    }
    /**
     * Set this directive as a non-functional wrapper, called when a custom viewport is used
     */
    setAsWrapper() {
        // In this case the default viewport and the default content wrapper will act as a mask
        this.nativeElement.className = 'ng-native-scrollbar-hider ng-scroll-layer';
        if (this.nativeElement.firstElementChild) {
            this.nativeElement.firstElementChild.className = 'ng-scroll-layer';
        }
    }
    /**
     * Set this directive as  the viewport, called when no custom viewport is used
     */
    setAsViewport(customClassName) {
        this.nativeElement.className += ` ng-native-scrollbar-hider ng-scroll-viewport ${customClassName}`;
        // Check if the custom viewport has only one child and set it as the content wrapper
        if (this.nativeElement.firstElementChild) {
            this.contentWrapperElement = this.nativeElement.firstElementChild;
            this.contentWrapperElement.classList.add('ng-scroll-content');
        }
    }
    /**
     * Scroll viewport vertically
     */
    scrollYTo(value) {
        this.nativeElement.scrollTop = value;
    }
    /**
     * Scroll viewport horizontally
     */
    scrollXTo(value) {
        this.nativeElement.scrollLeft = value;
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.1.5", ngImport: i0, type: ScrollViewport, deps: [{ token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive }); }
    static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.1.5", type: ScrollViewport, isStandalone: true, selector: "[scrollViewport]", ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.1.5", ngImport: i0, type: ScrollViewport, decorators: [{
            type: Directive,
            args: [{
                    selector: '[scrollViewport]',
                    standalone: true
                }]
        }], ctorParameters: function () { return [{ type: i0.ElementRef }]; } });
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this.clientWidth;\r\n  }\r\n\r\n  get scrollMaxY(): number {\r\n    return this.scrollHeight - this.clientHeight;\r\n  }\r\n\r\n  get contentHeight(): number {\r\n    return this.contentWrapperElement?.clientHeight || 0;\r\n  }\r\n\r\n  get contentWidth(): number {\r\n    return this.contentWrapperElement?.clientWidth || 0;\r\n  }\r\n\r\n  constructor(public viewPort: ElementRef) {\r\n    this.nativeElement = viewPort.nativeElement;\r\n  }\r\n\r\n  /**\r\n   * Activate viewport pointer events such as 'hovered' and 'clicked' events\r\n   */\r\n  activatePointerEvents(propagate: boolean, destroyed: Observable<void>): void {\r\n    this.hovered = new Observable((subscriber: Subscriber<MouseEvent | false>) => {\r\n      // Stream that emits when pointer is moved over the viewport (used to set the hovered state)\r\n      const mouseMoveStream = fromEvent<MouseEvent>(this.nativeElement, 'mousemove', { passive: true });\r\n      const mouseMove = propagate ? mouseMoveStream : mouseMoveStream.pipe(stopPropagation());\r\n      // Stream that emits when pointer leaves the viewport (used to remove the hovered state)\r\n      const mouseLeave = fromEvent<false>(this.nativeElement, 'mouseleave', { passive: true }).pipe(map(() => false));\r\n      merge(mouseMove, mouseLeave).pipe(\r\n        tap((e: MouseEvent | false) => subscriber.next(e)),\r\n        takeUntil(destroyed)\r\n      ).subscribe();\r\n    });\r\n\r\n    this.clicked = new Observable((subscriber: Subscriber<MouseEvent | false>) => {\r\n      const mouseDown = fromEvent<MouseEvent>(this.nativeElement, 'mousedown', { passive: true }).pipe(\r\n        tap((e: MouseEvent) => subscriber.next(e))\r\n      );\r\n      const mouseUp = fromEvent<false>(this.nativeElement, 'mouseup', { passive: true }).pipe(\r\n        tap(() => subscriber.next(false))\r\n      );\r\n      mouseDown.pipe(\r\n        switchMap(() => mouseUp),\r\n        takeUntil(destroyed)\r\n      ).subscribe();\r\n    });\r\n  }\r\n\r\n  /**\r\n   * Set this directive as a non-functional wrapper, called when a custom viewport is used\r\n   */\r\n  setAsWrapper(): void {\r\n    // In this case the default viewport and the default content wrapper will act as a mask\r\n    this.nativeElement.className = 'ng-native-scrollbar-hider ng-scroll-layer';\r\n    if (this.nativeElement.firstElementChild) {\r\n      this.nativeElement.firstElementChild.className = 'ng-scroll-layer';\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Set this directive as  the viewport, called when no custom viewport is used\r\n   */\r\n  setAsViewport(customClassName: string): void {\r\n    this.nativeElement.className += ` ng-native-scrollbar-hider ng-scroll-viewport ${ customClassName }`;\r\n    // Check if the custom viewport has only one child and set it as the content wrapper\r\n    if (this.nativeElement.firstElementChild) {\r\n      this.contentWrapperElement = this.nativeElement.firstElementChild as HTMLElement;\r\n      this.contentWrapperElement.classList.add('ng-scroll-content');\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Scroll viewport vertically\r\n   */\r\n  scrollYTo(value: number): void {\r\n    this.nativeElement.scrollTop = value;\r\n  }\r\n\r\n  /**\r\n   * Scroll viewport horizontally\r\n   */\r\n  scrollXTo(value: number): void {\r\n    this.nativeElement.scrollLeft = value;\r\n  }\r\n}\r\n"]}