@ng-matero/extensions
Version:
Angular Material Extensions
82 lines • 12.9 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 { Directive } from '@angular/core';
import { fromEvent, merge, Subject } from 'rxjs';
import { filter, map, mapTo, pairwise, startWith, take, takeUntil } from 'rxjs/operators';
import { HEADER_CELL_SELECTOR, RESIZE_OVERLAY_SELECTOR } from './selectors';
import { closest } from './polyfill';
import * as i0 from "@angular/core";
const HOVER_OR_ACTIVE_CLASS = 'cdk-column-resize-hover-or-active';
const WITH_RESIZED_COLUMN_CLASS = 'cdk-column-resize-with-resized-column';
let nextId = 0;
/**
* Base class for ColumnResize directives which attach to mat-table elements to
* provide common events and services for column resizing.
*/
export class ColumnResize {
constructor() {
this.destroyed = new Subject();
/** Unique ID for this table instance. */
this.selectorId = `${++nextId}`;
}
ngAfterViewInit() {
this.elementRef.nativeElement.classList.add(this.getUniqueCssClass());
this._listenForRowHoverEvents();
this._listenForResizeActivity();
this._listenForHoverActivity();
}
ngOnDestroy() {
this.destroyed.next();
this.destroyed.complete();
}
/** Gets the unique CSS class name for this table instance. */
getUniqueCssClass() {
return `cdk-column-resize-${this.selectorId}`;
}
/** Called when a column in the table is resized. Applies a css class to the table element. */
setResized() {
this.elementRef.nativeElement.classList.add(WITH_RESIZED_COLUMN_CLASS);
}
_listenForRowHoverEvents() {
this.ngZone.runOutsideAngular(() => {
const element = this.elementRef.nativeElement;
fromEvent(element, 'mouseover')
.pipe(map(event => closest(event.target, HEADER_CELL_SELECTOR)), takeUntil(this.destroyed))
.subscribe(this.eventDispatcher.headerCellHovered);
fromEvent(element, 'mouseleave')
.pipe(filter(event => !!event.relatedTarget &&
!event.relatedTarget.matches(RESIZE_OVERLAY_SELECTOR)), mapTo(null), takeUntil(this.destroyed))
.subscribe(this.eventDispatcher.headerCellHovered);
});
}
_listenForResizeActivity() {
merge(this.eventDispatcher.overlayHandleActiveForCell.pipe(mapTo(undefined)), this.notifier.triggerResize.pipe(mapTo(undefined)), this.notifier.resizeCompleted.pipe(mapTo(undefined)))
.pipe(take(1), takeUntil(this.destroyed))
.subscribe(() => {
this.setResized();
});
}
_listenForHoverActivity() {
this.eventDispatcher.headerRowHoveredOrActiveDistinct
.pipe(startWith(null), pairwise(), takeUntil(this.destroyed))
.subscribe(([previousRow, hoveredRow]) => {
if (hoveredRow) {
hoveredRow.classList.add(HOVER_OR_ACTIVE_CLASS);
}
if (previousRow) {
previousRow.classList.remove(HOVER_OR_ACTIVE_CLASS);
}
});
}
/** @nocollapse */ static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.0", ngImport: i0, type: ColumnResize, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
/** @nocollapse */ static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.2.0", type: ColumnResize, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.0", ngImport: i0, type: ColumnResize, decorators: [{
type: Directive
}] });
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Exposed For use by column-level directives */\n  abstract readonly elementRef: ElementRef<HTMLElement>;\n\n  protected abstract readonly eventDispatcher: HeaderRowEventDispatcher;\n  protected abstract readonly ngZone: NgZone;\n  protected abstract readonly notifier: ColumnResizeNotifierSource;\n\n  /** Unique ID for this table instance. */\n  protected readonly selectorId = `${++nextId}`;\n\n  /** The id attribute of the table, if specified. */\n  id?: string;\n\n  ngAfterViewInit() {\n    this.elementRef.nativeElement.classList.add(this.getUniqueCssClass());\n\n    this._listenForRowHoverEvents();\n    this._listenForResizeActivity();\n    this._listenForHoverActivity();\n  }\n\n  ngOnDestroy() {\n    this.destroyed.next();\n    this.destroyed.complete();\n  }\n\n  /** Gets the unique CSS class name for this table instance. */\n  getUniqueCssClass() {\n    return `cdk-column-resize-${this.selectorId}`;\n  }\n\n  /** Called when a column in the table is resized. Applies a css class to the table element. */\n  setResized() {\n    this.elementRef.nativeElement.classList.add(WITH_RESIZED_COLUMN_CLASS);\n  }\n\n  private _listenForRowHoverEvents() {\n    this.ngZone.runOutsideAngular(() => {\n      const element = this.elementRef.nativeElement;\n\n      fromEvent<MouseEvent>(element, 'mouseover')\n        .pipe(\n          map(event => closest(event.target, HEADER_CELL_SELECTOR)),\n          takeUntil(this.destroyed)\n        )\n        .subscribe(this.eventDispatcher.headerCellHovered);\n      fromEvent<MouseEvent>(element, 'mouseleave')\n        .pipe(\n          filter(\n            event =>\n              !!event.relatedTarget &&\n              !(event.relatedTarget as Element).matches(RESIZE_OVERLAY_SELECTOR)\n          ),\n          mapTo(null),\n          takeUntil(this.destroyed)\n        )\n        .subscribe(this.eventDispatcher.headerCellHovered);\n    });\n  }\n\n  private _listenForResizeActivity() {\n    merge(\n      this.eventDispatcher.overlayHandleActiveForCell.pipe(mapTo(undefined)),\n      this.notifier.triggerResize.pipe(mapTo(undefined)),\n      this.notifier.resizeCompleted.pipe(mapTo(undefined))\n    )\n      .pipe(take(1), takeUntil(this.destroyed))\n      .subscribe(() => {\n        this.setResized();\n      });\n  }\n\n  private _listenForHoverActivity() {\n    this.eventDispatcher.headerRowHoveredOrActiveDistinct\n      .pipe(startWith(null), pairwise(), takeUntil(this.destroyed))\n      .subscribe(([previousRow, hoveredRow]) => {\n        if (hoveredRow) {\n          hoveredRow.classList.add(HOVER_OR_ACTIVE_CLASS);\n        }\n        if (previousRow) {\n          previousRow.classList.remove(HOVER_OR_ACTIVE_CLASS);\n        }\n      });\n  }\n}\n"]}