@taiga-ui/kit
Version:
Taiga UI Angular main components kit
85 lines • 16.1 kB
JavaScript
import { inject, Injectable } from '@angular/core';
import { WaMutationObserverService } from '@ng-web-apis/mutation-observer';
import { WaResizeObserverService } from '@ng-web-apis/resize-observer';
import { tuiZonefreeScheduler, tuiZoneOptimized } from '@taiga-ui/cdk/observables';
import { tuiInjectElement } from '@taiga-ui/cdk/utils/dom';
import { tuiClamp } from '@taiga-ui/cdk/utils/math';
import { debounceTime, distinctUntilChanged, map, merge, Observable, share } from 'rxjs';
import { TuiItemsWithMoreDirective } from './items-with-more.directive';
import * as i0 from "@angular/core";
class TuiItemsWithMoreService extends Observable {
constructor() {
super((subscriber) => this.stream$.subscribe(subscriber));
this.el = tuiInjectElement();
this.directive = inject(TuiItemsWithMoreDirective);
this.stream$ = merge(this.directive.change$, inject(WaMutationObserverService, { self: true }), inject(WaResizeObserverService, { self: true })).pipe(debounceTime(0, tuiZonefreeScheduler()), map(() => this.directive.linesLimit > 1
? this.getOverflowIndexMultiline()
: this.getOverflowIndex(Array.from(this.el.children))), distinctUntilChanged(), tuiZoneOptimized(), share());
}
getOverflowIndex(children) {
const { computedSide, itemsLimit } = this.directive;
const { clientWidth } = this.el;
const items = Array.from(children, ({ clientWidth }) => clientWidth);
const index = computedSide === 'start' ? 0 : items.length - 1;
const more = children[index]?.tagName === 'SPAN' ? (items[index] ?? 0) : 0;
const total = items.reduce((sum, width) => sum + width, 0) - more;
if (total <= clientWidth && itemsLimit >= items.length) {
return computedSide === 'end' ? itemsLimit : 0;
}
return computedSide === 'start'
? this.getIndexStart(items, total, more)
: this.getIndexEnd(items, total, more);
}
getIndexStart(items, total, more) {
const { required, itemsLimit } = this.directive;
const { clientWidth } = this.el;
const min = Number.isFinite(itemsLimit) ? items.length - itemsLimit - 1 : 0;
const last = items.length - 1;
const mandatory = required === -1 ? last : required;
for (let i = 1; i < last; i++) {
if (i === mandatory + 1) {
continue;
}
total -= items[i] ?? 0;
if (total + more <= clientWidth) {
return tuiClamp(i, mandatory < min ? min + 1 : min, items.length);
}
}
return items.length;
}
getIndexEnd(items, total, more) {
const { required, itemsLimit } = this.directive;
const { clientWidth } = this.el;
const max = itemsLimit > required ? itemsLimit - 1 : itemsLimit - 2;
const last = items.length - 1;
const mandatory = required === -1 ? 0 : required;
for (let i = last - 1; i > 0; i--) {
if (i === mandatory) {
continue;
}
total -= items[i] ?? 0;
if (total + more <= clientWidth) {
return tuiClamp(i - 1, -1, max);
}
}
return -1;
}
getOverflowIndexMultiline() {
const { children } = this.el;
const { linesLimit, itemsLimit } = this.directive;
const items = Array.from(children);
const rows = new Set(items.map((item) => item.offsetTop));
const offset = Array.from(rows)[linesLimit - 1];
const firstItemLastRow = items.findIndex((i) => i.offsetTop === offset);
const lastRow = items.slice(firstItemLastRow);
const index = firstItemLastRow + this.getOverflowIndex(lastRow);
return Math.min(itemsLimit - 1, index);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiItemsWithMoreService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiItemsWithMoreService }); }
}
export { TuiItemsWithMoreService };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiItemsWithMoreService, decorators: [{
type: Injectable
}], ctorParameters: function () { return []; } });
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{inject, Injectable} from '@angular/core';\nimport {WaMutationObserverService} from '@ng-web-apis/mutation-observer';\nimport {WaResizeObserverService} from '@ng-web-apis/resize-observer';\nimport {tuiZonefreeScheduler, tuiZoneOptimized} from '@taiga-ui/cdk/observables';\nimport {tuiInjectElement} from '@taiga-ui/cdk/utils/dom';\nimport {tuiClamp} from '@taiga-ui/cdk/utils/math';\nimport {debounceTime, distinctUntilChanged, map, merge, Observable, share} from 'rxjs';\n\nimport {TuiItemsWithMoreDirective} from './items-with-more.directive';\n\n@Injectable()\nexport class TuiItemsWithMoreService extends Observable<number> {\n    private readonly el = tuiInjectElement();\n    private readonly directive = inject(TuiItemsWithMoreDirective);\n\n    protected readonly stream$ = merge(\n        this.directive.change$,\n        inject(WaMutationObserverService, {self: true}),\n        inject(WaResizeObserverService, {self: true}),\n    ).pipe(\n        debounceTime(0, tuiZonefreeScheduler()),\n        map(() =>\n            this.directive.linesLimit > 1\n                ? this.getOverflowIndexMultiline()\n                : this.getOverflowIndex(Array.from(this.el.children)),\n        ),\n        distinctUntilChanged(),\n        tuiZoneOptimized(),\n        share(),\n    );\n\n    constructor() {\n        super((subscriber) => this.stream$.subscribe(subscriber));\n    }\n\n    private getOverflowIndex(children: Element[]): number {\n        const {computedSide, itemsLimit} = this.directive;\n        const {clientWidth} = this.el;\n        const items = Array.from(children, ({clientWidth}) => clientWidth);\n        const index = computedSide === 'start' ? 0 : items.length - 1;\n        const more = children[index]?.tagName === 'SPAN' ? (items[index] ?? 0) : 0;\n        const total = items.reduce((sum, width) => sum + width, 0) - more;\n\n        if (total <= clientWidth && itemsLimit >= items.length) {\n            return computedSide === 'end' ? itemsLimit : 0;\n        }\n\n        return computedSide === 'start'\n            ? this.getIndexStart(items, total, more)\n            : this.getIndexEnd(items, total, more);\n    }\n\n    private getIndexStart(items: number[], total: number, more: number): number {\n        const {required, itemsLimit} = this.directive;\n        const {clientWidth} = this.el;\n        const min = Number.isFinite(itemsLimit) ? items.length - itemsLimit - 1 : 0;\n        const last = items.length - 1;\n        const mandatory = required === -1 ? last : required;\n\n        for (let i = 1; i < last; i++) {\n            if (i === mandatory + 1) {\n                continue;\n            }\n\n            total -= items[i] ?? 0;\n\n            if (total + more <= clientWidth) {\n                return tuiClamp(i, mandatory < min ? min + 1 : min, items.length);\n            }\n        }\n\n        return items.length;\n    }\n\n    private getIndexEnd(items: number[], total: number, more: number): number {\n        const {required, itemsLimit} = this.directive;\n        const {clientWidth} = this.el;\n        const max = itemsLimit > required ? itemsLimit - 1 : itemsLimit - 2;\n        const last = items.length - 1;\n        const mandatory = required === -1 ? 0 : required;\n\n        for (let i = last - 1; i > 0; i--) {\n            if (i === mandatory) {\n                continue;\n            }\n\n            total -= items[i] ?? 0;\n\n            if (total + more <= clientWidth) {\n                return tuiClamp(i - 1, -1, max);\n            }\n        }\n\n        return -1;\n    }\n\n    private getOverflowIndexMultiline(): number {\n        const {children} = this.el;\n        const {linesLimit, itemsLimit} = this.directive;\n        const items = Array.from(children) as HTMLElement[];\n        const rows = new Set(items.map((item) => item.offsetTop));\n        const offset = Array.from(rows)[linesLimit - 1];\n        const firstItemLastRow = items.findIndex((i) => i.offsetTop === offset);\n        const lastRow = items.slice(firstItemLastRow);\n        const index = firstItemLastRow + this.getOverflowIndex(lastRow);\n\n        return Math.min(itemsLimit - 1, index);\n    }\n}\n"]}