@ng-matero/extensions
Version:
Angular Material Extensions
70 lines • 11.2 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { Injectable } from '@angular/core';
import { combineLatest, Observable, Subject } from 'rxjs';
import { distinctUntilChanged, map, share, skip, startWith } from 'rxjs/operators';
import { closest } from './polyfill';
import { HEADER_ROW_SELECTOR } from './selectors';
import * as i0 from "@angular/core";
/** Coordinates events between the column resize directives. */
export class HeaderRowEventDispatcher {
constructor(_ngZone) {
this._ngZone = _ngZone;
/**
* Emits the currently hovered header cell or null when no header cells are hovered.
* Exposed publicly for events to feed in, but subscribers should use headerCellHoveredDistinct,
* defined below.
*/
this.headerCellHovered = new Subject();
/**
* Emits the header cell for which a user-triggered resize is active or null
* when no resize is in progress.
*/
this.overlayHandleActiveForCell = new Subject();
/** Distinct and shared version of headerCellHovered. */
this.headerCellHoveredDistinct = this.headerCellHovered.pipe(distinctUntilChanged(), share());
/**
* Emits the header that is currently hovered or hosting an active resize event (with active
* taking precedence).
*/
this.headerRowHoveredOrActiveDistinct = combineLatest([
this.headerCellHoveredDistinct.pipe(map(cell => closest(cell, HEADER_ROW_SELECTOR)), startWith(null), distinctUntilChanged()),
this.overlayHandleActiveForCell.pipe(map(cell => closest(cell, HEADER_ROW_SELECTOR)), startWith(null), distinctUntilChanged()),
]).pipe(skip(1), // Ignore initial [null, null] emission.
map(([hovered, active]) => active || hovered), distinctUntilChanged(), share());
this._headerRowHoveredOrActiveDistinctReenterZone = this.headerRowHoveredOrActiveDistinct.pipe(this._enterZone(), share());
// Optimization: Share row events observable with subsequent callers.
// At startup, calls will be sequential by row (and typically there's only one).
this._lastSeenRow = null;
this._lastSeenRowHover = null;
}
/**
* Emits whether the specified row should show its overlay controls.
* Emission occurs within the NgZone.
*/
resizeOverlayVisibleForHeaderRow(row) {
if (row !== this._lastSeenRow) {
this._lastSeenRow = row;
this._lastSeenRowHover = this._headerRowHoveredOrActiveDistinctReenterZone.pipe(map(hoveredRow => hoveredRow === row), distinctUntilChanged(), share());
}
return this._lastSeenRowHover;
}
_enterZone() {
return (source) => new Observable(observer => source.subscribe({
next: value => this._ngZone.run(() => observer.next(value)),
error: err => observer.error(err),
complete: () => observer.complete(),
}));
}
/** @nocollapse */ static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.0", ngImport: i0, type: HeaderRowEventDispatcher, deps: [{ token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Injectable }); }
/** @nocollapse */ static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.2.0", ngImport: i0, type: HeaderRowEventDispatcher }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.0", ngImport: i0, type: HeaderRowEventDispatcher, decorators: [{
type: Injectable
}], ctorParameters: () => [{ type: i0.NgZone }] });
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