@angular/cdk
Version:
Angular Material Component Development Kit
117 lines • 18.4 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 { DOCUMENT } from '@angular/common';
import { Inject, Injectable } from '@angular/core';
import { Platform, _getEventTarget } from '@angular/cdk/platform';
import { BaseOverlayDispatcher } from './base-overlay-dispatcher';
import * as i0 from "@angular/core";
import * as i1 from "@angular/cdk/platform";
/**
* Service for dispatching mouse click events that land on the body to appropriate overlay ref,
* if any. It maintains a list of attached overlays to determine best suited overlay based
* on event target and order of overlay opens.
*/
export class OverlayOutsideClickDispatcher extends BaseOverlayDispatcher {
constructor(document, _platform) {
super(document);
this._platform = _platform;
this._cursorStyleIsSet = false;
/** Store pointerdown event target to track origin of click. */
this._pointerDownListener = (event) => {
this._pointerDownEventTarget = _getEventTarget(event);
};
/** Click event listener that will be attached to the body propagate phase. */
this._clickListener = (event) => {
const target = _getEventTarget(event);
// In case of a click event, we want to check the origin of the click
// (e.g. in case where a user starts a click inside the overlay and
// releases the click outside of it).
// This is done by using the event target of the preceding pointerdown event.
// Every click event caused by a pointer device has a preceding pointerdown
// event, unless the click was programmatically triggered (e.g. in a unit test).
const origin = event.type === 'click' && this._pointerDownEventTarget
? this._pointerDownEventTarget
: target;
// Reset the stored pointerdown event target, to avoid having it interfere
// in subsequent events.
this._pointerDownEventTarget = null;
// We copy the array because the original may be modified asynchronously if the
// outsidePointerEvents listener decides to detach overlays resulting in index errors inside
// the for loop.
const overlays = this._attachedOverlays.slice();
// Dispatch the mouse event to the top overlay which has subscribers to its mouse events.
// We want to target all overlays for which the click could be considered as outside click.
// As soon as we reach an overlay for which the click is not outside click we break off
// the loop.
for (let i = overlays.length - 1; i > -1; i--) {
const overlayRef = overlays[i];
if (overlayRef._outsidePointerEvents.observers.length < 1 || !overlayRef.hasAttached()) {
continue;
}
// If it's a click inside the overlay, just break - we should do nothing
// If it's an outside click (both origin and target of the click) dispatch the mouse event,
// and proceed with the next overlay
if (overlayRef.overlayElement.contains(target) ||
overlayRef.overlayElement.contains(origin)) {
break;
}
overlayRef._outsidePointerEvents.next(event);
}
};
}
/** Add a new overlay to the list of attached overlay refs. */
add(overlayRef) {
super.add(overlayRef);
// Safari on iOS does not generate click events for non-interactive
// elements. However, we want to receive a click for any element outside
// the overlay. We can force a "clickable" state by setting
// `cursor: pointer` on the document body. See:
// https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event#Safari_Mobile
// https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html
if (!this._isAttached) {
const body = this._document.body;
body.addEventListener('pointerdown', this._pointerDownListener, true);
body.addEventListener('click', this._clickListener, true);
body.addEventListener('auxclick', this._clickListener, true);
body.addEventListener('contextmenu', this._clickListener, true);
// click event is not fired on iOS. To make element "clickable" we are
// setting the cursor to pointer
if (this._platform.IOS && !this._cursorStyleIsSet) {
this._cursorOriginalValue = body.style.cursor;
body.style.cursor = 'pointer';
this._cursorStyleIsSet = true;
}
this._isAttached = true;
}
}
/** Detaches the global keyboard event listener. */
detach() {
if (this._isAttached) {
const body = this._document.body;
body.removeEventListener('pointerdown', this._pointerDownListener, true);
body.removeEventListener('click', this._clickListener, true);
body.removeEventListener('auxclick', this._clickListener, true);
body.removeEventListener('contextmenu', this._clickListener, true);
if (this._platform.IOS && this._cursorStyleIsSet) {
body.style.cursor = this._cursorOriginalValue;
this._cursorStyleIsSet = false;
}
this._isAttached = false;
}
}
}
OverlayOutsideClickDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.2.0", ngImport: i0, type: OverlayOutsideClickDispatcher, deps: [{ token: DOCUMENT }, { token: i1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });
OverlayOutsideClickDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "13.2.0", ngImport: i0, type: OverlayOutsideClickDispatcher, providedIn: 'root' });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.2.0", ngImport: i0, type: OverlayOutsideClickDispatcher, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }, { type: i1.Platform }]; } });
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It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\n@Injectable({providedIn: 'root'})\nexport class OverlayOutsideClickDispatcher extends BaseOverlayDispatcher {\n  private _cursorOriginalValue: string;\n  private _cursorStyleIsSet = false;\n  private _pointerDownEventTarget: EventTarget | null;\n\n  constructor(@Inject(DOCUMENT) document: any, private _platform: Platform) {\n    super(document);\n  }\n\n  /** Add a new overlay to the list of attached overlay refs. */\n  override add(overlayRef: OverlayReference): void {\n    super.add(overlayRef);\n\n    // Safari on iOS does not generate click events for non-interactive\n    // elements. However, we want to receive a click for any element outside\n    // the overlay. We can force a \"clickable\" state by setting\n    // `cursor: pointer` on the document body. See:\n    // https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event#Safari_Mobile\n    // https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html\n    if (!this._isAttached) {\n      const body = this._document.body;\n      body.addEventListener('pointerdown', this._pointerDownListener, true);\n      body.addEventListener('click', this._clickListener, true);\n      body.addEventListener('auxclick', this._clickListener, true);\n      body.addEventListener('contextmenu', this._clickListener, true);\n\n      // click event is not fired on iOS. To make element \"clickable\" we are\n      // setting the cursor to pointer\n      if (this._platform.IOS && !this._cursorStyleIsSet) {\n        this._cursorOriginalValue = body.style.cursor;\n        body.style.cursor = 'pointer';\n        this._cursorStyleIsSet = true;\n      }\n\n      this._isAttached = true;\n    }\n  }\n\n  /** Detaches the global keyboard event listener. */\n  protected detach() {\n    if (this._isAttached) {\n      const body = this._document.body;\n      body.removeEventListener('pointerdown', this._pointerDownListener, true);\n      body.removeEventListener('click', this._clickListener, true);\n      body.removeEventListener('auxclick', this._clickListener, true);\n      body.removeEventListener('contextmenu', this._clickListener, true);\n      if (this._platform.IOS && this._cursorStyleIsSet) {\n        body.style.cursor = this._cursorOriginalValue;\n        this._cursorStyleIsSet = false;\n      }\n      this._isAttached = false;\n    }\n  }\n\n  /** Store pointerdown event target to track origin of click. */\n  private _pointerDownListener = (event: PointerEvent) => {\n    this._pointerDownEventTarget = _getEventTarget(event);\n  };\n\n  /** Click event listener that will be attached to the body propagate phase. */\n  private _clickListener = (event: MouseEvent) => {\n    const target = _getEventTarget(event);\n    // In case of a click event, we want to check the origin of the click\n    // (e.g. in case where a user starts a click inside the overlay and\n    // releases the click outside of it).\n    // This is done by using the event target of the preceding pointerdown event.\n    // Every click event caused by a pointer device has a preceding pointerdown\n    // event, unless the click was programmatically triggered (e.g. in a unit test).\n    const origin =\n      event.type === 'click' && this._pointerDownEventTarget\n        ? this._pointerDownEventTarget\n        : target;\n    // Reset the stored pointerdown event target, to avoid having it interfere\n    // in subsequent events.\n    this._pointerDownEventTarget = null;\n\n    // We copy the array because the original may be modified asynchronously if the\n    // outsidePointerEvents listener decides to detach overlays resulting in index errors inside\n    // the for loop.\n    const overlays = this._attachedOverlays.slice();\n\n    // Dispatch the mouse event to the top overlay which has subscribers to its mouse events.\n    // We want to target all overlays for which the click could be considered as outside click.\n    // As soon as we reach an overlay for which the click is not outside click we break off\n    // the loop.\n    for (let i = overlays.length - 1; i > -1; i--) {\n      const overlayRef = overlays[i];\n      if (overlayRef._outsidePointerEvents.observers.length < 1 || !overlayRef.hasAttached()) {\n        continue;\n      }\n\n      // If it's a click inside the overlay, just break - we should do nothing\n      // If it's an outside click (both origin and target of the click) dispatch the mouse event,\n      // and proceed with the next overlay\n      if (\n        overlayRef.overlayElement.contains(target as Node) ||\n        overlayRef.overlayElement.contains(origin as Node)\n      ) {\n        break;\n      }\n\n      overlayRef._outsidePointerEvents.next(event);\n    }\n  };\n}\n"]}