@atlaskit/editor-plugin-interactivity/dist/es2019/collector/lifecycle-observer.js

Interactivity plugin for @atlaskit/editor-core

import { bind } from 'bind-event-listener';
import { getDocument } from '@atlaskit/browser-apis';
/**
 * Reports the page lifecycle signals that force an extra snapshot: the tab being hidden or
 * shown again, and the page being unloaded or restored from the back/forward cache.
 *
 * None of them is guaranteed to arrive — a mobile browser being killed raises nothing at all.
 * Snapshots carry session-to-date values, so losing the last one costs only the tail of that
 * session.
 */
export class LifecycleObserver {
  constructor(handlers) {
    this.handlers = handlers;
  }
  start() {
    const doc = getDocument();
    const unbindVisibilityChange = doc ? bind(doc, {
      type: 'visibilitychange',
      listener: () => {
        if (doc.visibilityState === 'hidden') {
          this.handlers.onHidden();
        } else {
          this.handlers.onVisible();
        }
      }
    }) : undefined;
    const unbindPageHide = bind(window, {
      type: 'pagehide',
      listener: () => this.handlers.onPageHide()
    });
    const unbindPageShow = bind(window, {
      type: 'pageshow',
      listener: () => this.handlers.onPageShow()
    });
    this.unbind = () => {
      unbindVisibilityChange === null || unbindVisibilityChange === void 0 ? void 0 : unbindVisibilityChange();
      unbindPageHide();
      unbindPageShow();
    };
  }
  stop() {
    var _this$unbind;
    (_this$unbind = this.unbind) === null || _this$unbind === void 0 ? void 0 : _this$unbind.call(this);
    this.unbind = undefined;
  }
}