@taiga-ui/core
Version:
Core library for creating Angular components and applications using Taiga UI
93 lines • 14.6 kB
JavaScript
import { Directive, inject, Input } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { WA_ANIMATION_FRAME } from '@ng-web-apis/common';
import { tuiScrollFrom, tuiZonefree, tuiZonefreeScheduler, } from '@taiga-ui/cdk/observables';
import { tuiInjectElement } from '@taiga-ui/cdk/utils/dom';
import { TUI_SCROLL_REF } from '@taiga-ui/core/tokens';
import { merge, throttleTime } from 'rxjs';
import { TuiScrollbarService } from './scrollbar.service';
import * as i0 from "@angular/core";
const MIN_WIDTH = 24;
class TuiScrollbarDirective {
constructor() {
this.el = inject(TUI_SCROLL_REF).nativeElement;
this.style = tuiInjectElement().style;
this.scrollSub = inject(TuiScrollbarService)
.pipe(takeUntilDestroyed())
.subscribe(([top, left]) => {
this.el.style.scrollBehavior = 'auto';
if (this.tuiScrollbar === 'horizontal') {
this.el.scrollLeft = left;
}
else {
this.el.scrollTop = top;
}
this.el.style.scrollBehavior = '';
});
this.styleSub = merge(inject(WA_ANIMATION_FRAME).pipe(throttleTime(100, tuiZonefreeScheduler())), tuiScrollFrom(this.el))
.pipe(tuiZonefree(), takeUntilDestroyed())
.subscribe(() => {
const dimension = {
scrollTop: this.el.scrollTop,
scrollHeight: this.el.scrollHeight,
clientHeight: this.el.clientHeight,
scrollLeft: this.el.scrollLeft,
scrollWidth: this.el.scrollWidth,
clientWidth: this.el.clientWidth,
};
const thumb = `${this.getThumb(dimension) * 100}%`;
const view = `${this.getView(dimension) * 100}%`;
if (this.tuiScrollbar === 'vertical') {
this.style.top = thumb;
this.style.height = view;
}
else {
this.style.left = thumb;
this.style.insetInlineStart = thumb;
this.style.width = view;
}
});
this.tuiScrollbar = 'vertical';
}
getScrolled(dimension) {
return this.tuiScrollbar === 'vertical'
? dimension.scrollTop / (dimension.scrollHeight - dimension.clientHeight)
: dimension.scrollLeft / (dimension.scrollWidth - dimension.clientWidth);
}
getCompensation(dimension) {
if (((dimension.clientHeight * dimension.clientHeight) / dimension.scrollHeight >
MIN_WIDTH &&
this.tuiScrollbar === 'vertical') ||
((dimension.clientWidth * dimension.clientWidth) / dimension.scrollWidth >
MIN_WIDTH &&
this.tuiScrollbar === 'horizontal')) {
return 0;
}
return this.tuiScrollbar === 'vertical'
? MIN_WIDTH / dimension.clientHeight
: MIN_WIDTH / dimension.clientWidth;
}
getThumb(dimension) {
const compensation = this.getCompensation(dimension) || this.getView(dimension);
return Math.abs(this.getScrolled(dimension) * (1 - compensation));
}
getView(dimension) {
return this.tuiScrollbar === 'vertical'
? Math.ceil((dimension.clientHeight / dimension.scrollHeight) * 100) / 100
: Math.ceil((dimension.clientWidth / dimension.scrollWidth) * 100) / 100;
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiScrollbarDirective, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.2.12", type: TuiScrollbarDirective, isStandalone: true, selector: "[tuiScrollbar]", inputs: { tuiScrollbar: "tuiScrollbar" }, providers: [TuiScrollbarService], ngImport: i0 }); }
}
export { TuiScrollbarDirective };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiScrollbarDirective, decorators: [{
type: Directive,
args: [{
standalone: true,
selector: '[tuiScrollbar]',
providers: [TuiScrollbarService],
}]
}], propDecorators: { tuiScrollbar: [{
type: Input
}] } });
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{Directive, inject, Input} from '@angular/core';\nimport {takeUntilDestroyed} from '@angular/core/rxjs-interop';\nimport {WA_ANIMATION_FRAME} from '@ng-web-apis/common';\nimport {\n    tuiScrollFrom,\n    tuiZonefree,\n    tuiZonefreeScheduler,\n} from '@taiga-ui/cdk/observables';\nimport {tuiInjectElement} from '@taiga-ui/cdk/utils/dom';\nimport {TUI_SCROLL_REF} from '@taiga-ui/core/tokens';\nimport {merge, throttleTime} from 'rxjs';\n\nimport {TuiScrollbarService} from './scrollbar.service';\n\nconst MIN_WIDTH = 24;\n\ninterface ComputedDimension {\n    scrollTop: number;\n    scrollHeight: number;\n    clientHeight: number;\n    scrollLeft: number;\n    scrollWidth: number;\n    clientWidth: number;\n}\n\n@Directive({\n    standalone: true,\n    selector: '[tuiScrollbar]',\n    providers: [TuiScrollbarService],\n})\nexport class TuiScrollbarDirective {\n    private readonly el = inject(TUI_SCROLL_REF).nativeElement;\n    private readonly style = tuiInjectElement().style;\n\n    protected readonly scrollSub = inject(TuiScrollbarService)\n        .pipe(takeUntilDestroyed())\n        .subscribe(([top, left]) => {\n            this.el.style.scrollBehavior = 'auto';\n\n            if (this.tuiScrollbar === 'horizontal') {\n                this.el.scrollLeft = left;\n            } else {\n                this.el.scrollTop = top;\n            }\n\n            this.el.style.scrollBehavior = '';\n        });\n\n    protected readonly styleSub = merge(\n        inject(WA_ANIMATION_FRAME).pipe(throttleTime(100, tuiZonefreeScheduler())),\n        tuiScrollFrom(this.el),\n    )\n        .pipe(tuiZonefree(), takeUntilDestroyed())\n        .subscribe(() => {\n            const dimension: ComputedDimension = {\n                scrollTop: this.el.scrollTop,\n                scrollHeight: this.el.scrollHeight,\n                clientHeight: this.el.clientHeight,\n                scrollLeft: this.el.scrollLeft,\n                scrollWidth: this.el.scrollWidth,\n                clientWidth: this.el.clientWidth,\n            };\n\n            const thumb = `${this.getThumb(dimension) * 100}%`;\n            const view = `${this.getView(dimension) * 100}%`;\n\n            if (this.tuiScrollbar === 'vertical') {\n                this.style.top = thumb;\n                this.style.height = view;\n            } else {\n                this.style.left = thumb;\n                this.style.insetInlineStart = thumb;\n                this.style.width = view;\n            }\n        });\n\n    @Input()\n    public tuiScrollbar: 'horizontal' | 'vertical' = 'vertical';\n\n    private getScrolled(dimension: ComputedDimension): number {\n        return this.tuiScrollbar === 'vertical'\n            ? dimension.scrollTop / (dimension.scrollHeight - dimension.clientHeight)\n            : dimension.scrollLeft / (dimension.scrollWidth - dimension.clientWidth);\n    }\n\n    private getCompensation(dimension: ComputedDimension): number {\n        if (\n            ((dimension.clientHeight * dimension.clientHeight) / dimension.scrollHeight >\n                MIN_WIDTH &&\n                this.tuiScrollbar === 'vertical') ||\n            ((dimension.clientWidth * dimension.clientWidth) / dimension.scrollWidth >\n                MIN_WIDTH &&\n                this.tuiScrollbar === 'horizontal')\n        ) {\n            return 0;\n        }\n\n        return this.tuiScrollbar === 'vertical'\n            ? MIN_WIDTH / dimension.clientHeight\n            : MIN_WIDTH / dimension.clientWidth;\n    }\n\n    private getThumb(dimension: ComputedDimension): number {\n        const compensation = this.getCompensation(dimension) || this.getView(dimension);\n\n        return Math.abs(this.getScrolled(dimension) * (1 - compensation));\n    }\n\n    private getView(dimension: ComputedDimension): number {\n        return this.tuiScrollbar === 'vertical'\n            ? Math.ceil((dimension.clientHeight / dimension.scrollHeight) * 100) / 100\n            : Math.ceil((dimension.clientWidth / dimension.scrollWidth) * 100) / 100;\n    }\n}\n"]}