ngx-scrollbar-v8
Version:
Custom overlay-scrollbars with native scrolling mechanism.
199 lines • 17.4 kB
JavaScript
/**
* @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 { Directionality } from '@angular/cdk/bidi';
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 NgScrollbarX = /** @class */ (function (_super) {
tslib_1.__extends(NgScrollbarX, _super);
function NgScrollbarX(_document, _parent, _platform, _dir, _zone) {
var _this = _super.call(this, _parent, _platform, _zone) || this;
_this._document = _document;
_this._parent = _parent;
_this._dir = _dir;
_this._zone = _zone;
return _this;
}
Object.defineProperty(NgScrollbarX.prototype, "thumbSize", {
/**
* Calculate scrollbar thumbnail size
*/
get: /**
* Calculate scrollbar thumbnail size
* @return {?}
*/
function () {
/** @type {?} */
var barClientWidth = this.bar.nativeElement.clientWidth;
/** @type {?} */
var viewClientWidth = this._view.clientWidth;
/** @type {?} */
var viewScrollWidth = this._view.scrollWidth;
this._naturalThumbSize = barClientWidth / viewScrollWidth * barClientWidth;
this._scrollMax = viewScrollWidth - viewClientWidth;
return this.scrollBoundaries(this._naturalThumbSize, this._scrollMax);
},
enumerable: true,
configurable: true
});
/**
* Scrollbar click
* @param e Mouse event
*/
/**
* Scrollbar click
* @param {?} e Mouse event
* @return {?}
*/
NgScrollbarX.prototype.onScrollbarHolderClick = /**
* Scrollbar click
* @param {?} e Mouse event
* @return {?}
*/
function (e) {
if (e.target === e.currentTarget) {
/** @type {?} */
var offsetX = e.offsetX - this._naturalThumbSize * .5;
/** @type {?} */
var thumbPositionPercentage = offsetX * 100 / this.bar.nativeElement.clientWidth;
/** @type {?} */
var value = thumbPositionPercentage * this._view.scrollWidth / 100;
this._parent.scrollTo((/** @type {?} */ ({ left: value, duration: this.scrollToDuration }))).subscribe();
}
};
/**
* Update scrollbar
*/
/**
* Update scrollbar
* @protected
* @return {?}
*/
NgScrollbarX.prototype.updateScrollbar = /**
* Update scrollbar
* @protected
* @return {?}
*/
function () {
var _this = this;
this._thumbSize = this.thumb.nativeElement.clientWidth;
this._trackMax = this.bar.nativeElement.clientWidth - this._thumbSize;
this._currPos = this._view.scrollLeft * this._trackMax / this._scrollMax;
this._zone.run((/**
* @return {?}
*/
function () {
animationFrameScheduler.schedule((/**
* @return {?}
*/
function () {
return _this.updateState({
transform: "translate3d(" + (_this._dir.value === 'rtl' ? _this._currPos - _this._trackMax : _this._currPos) + "px, 0, 0)",
width: _this.thumbSize + "px"
});
}));
}));
};
/**
* Start horizontal thumb worker
*/
/**
* Start horizontal thumb worker
* @protected
* @return {?}
*/
NgScrollbarX.prototype.startThumbEvents = /**
* Start horizontal 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$.pipe(tap((/**
* @return {?}
*/
function () {
_this._document.onselectstart = (/**
* @return {?}
*/
function () { return false; });
// Initialize trackMax for before start dragging
_this._trackMax = _this.bar.nativeElement.clientWidth - _this._thumbSize;
})), pluck('offsetX'), mergeMap((/**
* @param {?} mouseDownOffset
* @return {?}
*/
function (mouseDownOffset) { return mouseMove$.pipe(takeUntil(mouseUp$), pluck('clientX'), tap((/**
* @param {?} mouseMoveClient
* @return {?}
*/
function (mouseMoveClient) {
/** @type {?} */
var offsetX = mouseMoveClient - _this.bar.nativeElement.getBoundingClientRect().left;
/** @type {?} */
var value = _this._scrollMax * (offsetX - mouseDownOffset) / _this._trackMax;
if (_this._dir.value === 'rtl') {
value = value === 0 ? offsetX - _this._trackMax : value;
}
_this._parent.scrollable.scrollTo({ left: value });
}))); })));
};
NgScrollbarX.decorators = [
{ type: Component, args: [{
selector: 'ng-scrollbar-x',
changeDetection: ChangeDetectionStrategy.OnPush,
template: "\n <div #bar class=\"ng-scrollbar {{barClass}}\" (mousedown)=\"onScrollbarHolderClick($event)\">\n <div #thumb class=\"ng-scrollbar-thumb {{thumbClass}}\" [ngStyle]=\"scrollbarStyle | async\"></div>\n </div>\n "
}] }
];
/** @nocollapse */
NgScrollbarX.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: Directionality },
{ type: NgZone }
]; };
return NgScrollbarX;
}(NgScrollbarThumb));
export { NgScrollbarX };
if (false) {
/**
* @type {?}
* @protected
*/
NgScrollbarX.prototype._document;
/**
* @type {?}
* @protected
*/
NgScrollbarX.prototype._parent;
/**
* @type {?}
* @protected
*/
NgScrollbarX.prototype._dir;
/**
* @type {?}
* @protected
*/
NgScrollbarX.prototype._zone;
}
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{ Component, Inject, NgZone, ChangeDetectionStrategy, forwardRef, PLATFORM_ID } from '@angular/core';\nimport { DOCUMENT } from '@angular/common';\nimport { Directionality } from '@angular/cdk/bidi';\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-x',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  template: `\n    <div #bar class=\"ng-scrollbar {{barClass}}\" (mousedown)=\"onScrollbarHolderClick($event)\">\n      <div #thumb class=\"ng-scrollbar-thumb {{thumbClass}}\" [ngStyle]=\"scrollbarStyle | async\"></div>\n    </div>\n  `\n})\nexport class NgScrollbarX extends NgScrollbarThumb {\n\n  /**\n   * Calculate scrollbar thumbnail size\n   */\n  get thumbSize(): number {\n    const barClientWidth = this.bar.nativeElement.clientWidth;\n    const viewClientWidth = this._view.clientWidth;\n    const viewScrollWidth = this._view.scrollWidth;\n    this._naturalThumbSize = barClientWidth / viewScrollWidth * barClientWidth;\n    this._scrollMax = viewScrollWidth - viewClientWidth;\n    return this.scrollBoundaries(this._naturalThumbSize, this._scrollMax);\n  }\n\n  constructor(@Inject(DOCUMENT) protected _document: any,\n              @Inject(forwardRef(() => NgScrollbar)) protected _parent: NgScrollbar,\n              @Inject(PLATFORM_ID) _platform: Object,\n              protected _dir: Directionality,\n              protected _zone: NgZone) {\n    super(_parent, _platform, _zone);\n  }\n\n  /**\n   * Scrollbar click\n   * @param e Mouse event\n   */\n  onScrollbarHolderClick(e: any) {\n    if (e.target === e.currentTarget) {\n      const offsetX = e.offsetX - this._naturalThumbSize * .5;\n      const thumbPositionPercentage = offsetX * 100 / this.bar.nativeElement.clientWidth;\n      const value = thumbPositionPercentage * this._view.scrollWidth / 100;\n      this._parent.scrollTo({left: value, duration: this.scrollToDuration} as any).subscribe();\n    }\n  }\n\n  /**\n   * Update scrollbar\n   */\n  protected updateScrollbar() {\n    this._thumbSize = this.thumb.nativeElement.clientWidth;\n    this._trackMax = this.bar.nativeElement.clientWidth - this._thumbSize;\n    this._currPos = this._view.scrollLeft * this._trackMax / this._scrollMax;\n    this._zone.run(() => {\n      animationFrameScheduler.schedule(() =>\n        this.updateState({\n          transform: `translate3d(${this._dir.value === 'rtl' ? this._currPos - this._trackMax : this._currPos}px, 0, 0)`,\n          width: `${this.thumbSize}px`\n        })\n      );\n    });\n  }\n\n  /**\n   * Start horizontal thumb worker\n   */\n  protected startThumbEvents(): Observable<any> {\n    const mouseDown$ = 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$.pipe(\n      tap(() => {\n        this._document.onselectstart = () => false;\n        // Initialize trackMax for before start dragging\n        this._trackMax = this.bar.nativeElement.clientWidth - this._thumbSize;\n      }),\n      pluck('offsetX'),\n      mergeMap((mouseDownOffset: number) => mouseMove$.pipe(\n        takeUntil(mouseUp$),\n        pluck('clientX'),\n        tap((mouseMoveClient: number) => {\n          const offsetX = mouseMoveClient - this.bar.nativeElement.getBoundingClientRect().left;\n          let value = this._scrollMax * (offsetX - mouseDownOffset) / this._trackMax;\n          if (this._dir.value === 'rtl') {\n            value = value === 0 ? offsetX - this._trackMax : value;\n          }\n          this._parent.scrollable.scrollTo({left: value});\n        })\n      ))\n    );\n  }\n}\n"]}