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ngx-scrollbar-v8

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Custom overlay-scrollbars with native scrolling mechanism.

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/** * @fileoverview added by tsickle * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc */ import * as tslib_1 from "tslib"; import { Component, Inject, NgZone, ChangeDetectionStrategy, forwardRef, PLATFORM_ID } from '@angular/core'; import { DOCUMENT } from '@angular/common'; import { fromEvent, animationFrameScheduler } from 'rxjs'; import { mergeMap, pluck, takeUntil, tap } from 'rxjs/operators'; import { NgScrollbar } from './ng-scrollbar'; import { NgScrollbarThumb } from './ng-scrollbar-thumb'; var NgScrollbarY = /** @class */ (function (_super) { tslib_1.__extends(NgScrollbarY, _super); function NgScrollbarY(_document, _parent, _platform, _zone) { var _this = _super.call(this, _parent, _platform, _zone) || this; _this._document = _document; _this._parent = _parent; _this._zone = _zone; return _this; } Object.defineProperty(NgScrollbarY.prototype, "thumbSize", { /** * Calculate scrollbar thumbnail size */ get: /** * Calculate scrollbar thumbnail size * @return {?} */ function () { /** @type {?} */ var barClientHeight = this.bar.nativeElement.clientHeight; /** @type {?} */ var viewClientHeight = this._view.clientHeight; /** @type {?} */ var viewScrollHeight = this._view.scrollHeight; this._naturalThumbSize = barClientHeight / viewScrollHeight * barClientHeight; this._scrollMax = viewScrollHeight - viewClientHeight; return this.scrollBoundaries(this._naturalThumbSize, this._scrollMax); }, enumerable: true, configurable: true }); /** * Scrollbar click * @param e Mouse event */ /** * Scrollbar click * @param {?} e Mouse event * @return {?} */ NgScrollbarY.prototype.onScrollbarHolderClick = /** * Scrollbar click * @param {?} e Mouse event * @return {?} */ function (e) { if (e.target === e.currentTarget) { /** @type {?} */ var offsetY = e.offsetY - this._naturalThumbSize * .5; /** @type {?} */ var thumbPositionPercentage = offsetY * 100 / this.bar.nativeElement.clientHeight; /** @type {?} */ var value = thumbPositionPercentage * this._view.scrollHeight / 100; this._parent.scrollTo((/** @type {?} */ ({ top: value, duration: this.scrollToDuration }))).subscribe(); } }; /** * Update scrollbar */ /** * Update scrollbar * @protected * @return {?} */ NgScrollbarY.prototype.updateScrollbar = /** * Update scrollbar * @protected * @return {?} */ function () { var _this = this; this._thumbSize = this.thumb.nativeElement.clientHeight; this._trackMax = this.bar.nativeElement.clientHeight - this._thumbSize; this._currPos = this._view.scrollTop * this._trackMax / this._scrollMax; this._zone.run((/** * @return {?} */ function () { animationFrameScheduler.schedule((/** * @return {?} */ function () { return _this.updateState({ transform: "translate3d(0, " + _this._currPos + "px, 0)", height: _this.thumbSize + "px" }); })); })); }; /** * Start vertical thumb worker */ /** * Start vertical thumb worker * @protected * @return {?} */ NgScrollbarY.prototype.startThumbEvents = /** * Start vertical thumb worker * @protected * @return {?} */ function () { var _this = this; /** @type {?} */ var mouseDown$ = fromEvent(this.thumb.nativeElement, 'mousedown'); /** @type {?} */ var mouseMove$ = fromEvent(this._document, 'mousemove'); /** @type {?} */ var mouseUp$ = fromEvent(this._document, 'mouseup').pipe(tap((/** * @return {?} */ function () { return _this._document.onselectstart = null; }))); return mouseDown$.pipe(tap((/** * @return {?} */ function () { _this._document.onselectstart = (/** * @return {?} */ function () { return false; }); // Initialize trackMax for before start dragging _this._trackMax = _this.bar.nativeElement.clientHeight - _this._thumbSize; })), pluck('offsetY'), mergeMap((/** * @param {?} mouseDownOffset * @return {?} */ function (mouseDownOffset) { return mouseMove$.pipe(takeUntil(mouseUp$), pluck('clientY'), tap((/** * @param {?} mouseMoveClient * @return {?} */ function (mouseMoveClient) { /** @type {?} */ var offsetY = mouseMoveClient - _this.bar.nativeElement.getBoundingClientRect().top; /** @type {?} */ var value = _this._scrollMax * (offsetY - mouseDownOffset) / _this._trackMax; _this._parent.scrollable.scrollTo({ top: value }); }))); }))); }; NgScrollbarY.decorators = [ { type: Component, args: [{ selector: 'ng-scrollbar-y', changeDetection: ChangeDetectionStrategy.OnPush, template: "\n <div #bar class=\"ng-scrollbar {{barClass}}\" (mousedown)=\"onScrollbarHolderClick($event)\">\n <div #thumb class=\"ng-scrollbar-thumb {{thumbClass}}\" [ngStyle]=\"scrollbarStyle | async\"></div>\n </div>\n " }] } ]; /** @nocollapse */ NgScrollbarY.ctorParameters = function () { return [ { type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }, { type: NgScrollbar, decorators: [{ type: Inject, args: [forwardRef((/** * @return {?} */ function () { return NgScrollbar; })),] }] }, { type: Object, decorators: [{ type: Inject, args: [PLATFORM_ID,] }] }, { type: NgZone } ]; }; return NgScrollbarY; }(NgScrollbarThumb)); export { NgScrollbarY }; if (false) { /** * @type {?} * @protected */ NgScrollbarY.prototype._document; /** * @type {?} * @protected */ NgScrollbarY.prototype._parent; /** * @type {?} * @protected */ NgScrollbarY.prototype._zone; } //# 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{ Component, Inject, NgZone, ChangeDetectionStrategy, forwardRef, PLATFORM_ID } from '@angular/core';\nimport { DOCUMENT } from '@angular/common';\nimport { fromEvent, Observable, animationFrameScheduler } from 'rxjs';\nimport { mergeMap, pluck, takeUntil, tap } from 'rxjs/operators';\nimport { NgScrollbar } from './ng-scrollbar';\nimport { NgScrollbarThumb } from './ng-scrollbar-thumb';\n\n@Component({\n  selector: 'ng-scrollbar-y',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  template: `\n    <div #bar class=\"ng-scrollbar {{barClass}}\" (mousedown)=\"onScrollbarHolderClick($event)\">\n      <div #thumb class=\"ng-scrollbar-thumb {{thumbClass}}\" [ngStyle]=\"scrollbarStyle | async\"></div>\n    </div>\n  `\n})\nexport class NgScrollbarY extends NgScrollbarThumb {\n\n  /**\n   * Calculate scrollbar thumbnail size\n   */\n  get thumbSize(): number {\n    const barClientHeight = this.bar.nativeElement.clientHeight;\n    const viewClientHeight = this._view.clientHeight;\n    const viewScrollHeight = this._view.scrollHeight;\n    this._naturalThumbSize = barClientHeight / viewScrollHeight * barClientHeight;\n    this._scrollMax = viewScrollHeight - viewClientHeight;\n    return this.scrollBoundaries(this._naturalThumbSize, this._scrollMax);\n  }\n\n  constructor(@Inject(DOCUMENT) protected _document: any,\n              @Inject(forwardRef(() => NgScrollbar)) protected _parent: NgScrollbar,\n              @Inject(PLATFORM_ID) _platform: Object,\n              protected _zone: NgZone) {\n    super(_parent, _platform, _zone);\n  }\n\n  /**\n   * Scrollbar click\n   * @param e Mouse event\n   */\n  onScrollbarHolderClick(e: any) {\n    if (e.target === e.currentTarget) {\n      const offsetY = e.offsetY - this._naturalThumbSize * .5;\n      const thumbPositionPercentage = offsetY * 100 / this.bar.nativeElement.clientHeight;\n      const value = thumbPositionPercentage * this._view.scrollHeight / 100;\n      this._parent.scrollTo({top: value, duration: this.scrollToDuration} as any).subscribe();\n    }\n  }\n\n  /**\n   * Update scrollbar\n   */\n  protected updateScrollbar() {\n    this._thumbSize = this.thumb.nativeElement.clientHeight;\n    this._trackMax = this.bar.nativeElement.clientHeight - this._thumbSize;\n    this._currPos = this._view.scrollTop * this._trackMax / this._scrollMax;\n    this._zone.run(() => {\n      animationFrameScheduler.schedule(() =>\n        this.updateState({\n          transform: `translate3d(0, ${this._currPos}px, 0)`,\n          height: `${this.thumbSize}px`\n        })\n      );\n    });\n  }\n\n  /**\n   * Start vertical thumb worker\n   */\n  protected startThumbEvents(): Observable<any> {\n    const mouseDown$ = fromEvent(this.thumb.nativeElement, 'mousedown');\n    const mouseMove$ = fromEvent(this._document, 'mousemove');\n    const mouseUp$ = fromEvent(this._document, 'mouseup').pipe(\n      tap(() => this._document.onselectstart = null)\n    );\n    return mouseDown$.pipe(\n      tap(() => {\n        this._document.onselectstart = () => false;\n        // Initialize trackMax for before start dragging\n        this._trackMax = this.bar.nativeElement.clientHeight - this._thumbSize;\n      }),\n      pluck('offsetY'),\n      mergeMap((mouseDownOffset: number) => mouseMove$.pipe(\n        takeUntil(mouseUp$),\n        pluck('clientY'),\n        tap((mouseMoveClient: number) => {\n          const offsetY = mouseMoveClient - this.bar.nativeElement.getBoundingClientRect().top;\n          const value = this._scrollMax * (offsetY - mouseDownOffset) / this._trackMax;\n          this._parent.scrollable.scrollTo({top: value});\n        })\n      ))\n    );\n  }\n}\n"]}