ngx-foldable
Version:
Angular library to help you build dual-screen experiences for foldable or dual-screen devices
96 lines • 11.9 kB
JavaScript
import { Injectable } from '@angular/core';
import { fromEvent, merge, ReplaySubject } from 'rxjs';
import { map, filter, shareReplay, startWith, takeUntil } from 'rxjs/operators';
import { dualVerticalViewport, dualHorizontalViewport } from './media-queries';
import { ScreenSpanning } from './screen-spanning';
import * as i0 from "@angular/core";
/**
* This service allows to query and receive updates about current device's
* screen context.
*
* See {@link ScreenContextData}
*/
export class ScreenContext {
constructor() {
this.destroyed$ = new ReplaySubject(1);
this.currentContext = this.getScreenContext();
this.screenContext$ = merge(fromEvent(matchMedia(dualVerticalViewport), 'change'), fromEvent(matchMedia(dualHorizontalViewport), 'change')).pipe(filter(() => this.getScreenSpanning() !== this.currentContext.screenSpanning), startWith(1), map(() => {
this.currentContext = this.getScreenContext();
return this.currentContext;
}), shareReplay(1), takeUntil(this.destroyed$));
this.screenContext$.subscribe();
}
/** @ignored */
ngOnDestroy() {
this.destroyed$.next();
this.destroyed$.complete();
}
/**
* The list of available window segments.
*/
get windowSegments() {
return this.currentContext.windowSegments;
}
/**
* The current screen spanning mode.
*/
get screenSpanning() {
return this.currentContext.screenSpanning;
}
/**
* True is current device have multiple screens available.
*/
get isMultiScreen() {
return this.currentContext.isMultiScreen;
}
/**
* Gets an observable emitting when the screen context changes.
*/
asObservable() {
return this.screenContext$;
}
/**
* Gets the current screen context.
*/
asObject() {
return this.currentContext;
}
getScreenContext() {
const windowSegments = this.getWindowSegments();
const screenSpanning = this.getScreenSpanning();
return {
windowSegments,
screenSpanning,
isMultiScreen: screenSpanning !== ScreenSpanning.None,
};
}
getScreenSpanning() {
if (matchMedia(dualVerticalViewport).matches) {
return ScreenSpanning.DualVertical;
}
else if (matchMedia(dualHorizontalViewport).matches) {
return ScreenSpanning.DualHorizontal;
}
return ScreenSpanning.None;
}
getWindowSegments() {
if ('getWindowSegments' in window) {
console.warn('getWindowSegments() is not supported anymore, please update your browser to use the new visualViewport API');
}
if ('visualViewport' in window) {
return window.visualViewport.segments;
}
return [
new DOMRect(window.pageXOffset, window.pageYOffset, window.innerWidth, window.innerHeight),
];
}
}
ScreenContext.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.0.1", ngImport: i0, type: ScreenContext, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
ScreenContext.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.0.1", ngImport: i0, type: ScreenContext, providedIn: 'root' });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.0.1", ngImport: i0, type: ScreenContext, decorators: [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}], ctorParameters: function () { return []; } });
//# 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{ Injectable, OnDestroy } from '@angular/core';\nimport { fromEvent, merge, Observable, ReplaySubject } from 'rxjs';\nimport { map, filter, shareReplay, startWith, takeUntil } from 'rxjs/operators';\nimport { dualVerticalViewport, dualHorizontalViewport } from './media-queries';\nimport { ScreenSpanning } from './screen-spanning';\n\ndeclare global {\n  interface Window {\n    getWindowSegments: () => DOMRect[];\n  }\n}\n\n/**\n * Holds information about the device screen context.\n */\nexport interface ScreenContextData {\n  /** The list of available window segments. */\n  readonly windowSegments: DOMRect[];\n  /** The current screen spanning mode. */\n  readonly screenSpanning: ScreenSpanning;\n  /** True is current device have multiple screens available. */\n  readonly isMultiScreen: boolean;\n}\n\n/**\n * This service allows to query and receive updates about current device's\n * screen context.\n *\n * See {@link ScreenContextData}\n */\n@Injectable({\n  providedIn: 'root',\n})\nexport class ScreenContext implements ScreenContextData, OnDestroy {\n  private currentContext: ScreenContextData;\n  private screenContext$: Observable<ScreenContextData>;\n  private destroyed$: ReplaySubject<void> = new ReplaySubject(1);\n\n  constructor() {\n    this.currentContext = this.getScreenContext();\n    this.screenContext$ = merge(\n      fromEvent(matchMedia(dualVerticalViewport), 'change'),\n      fromEvent(matchMedia(dualHorizontalViewport), 'change')\n    ).pipe(\n      filter(\n        () => this.getScreenSpanning() !== this.currentContext.screenSpanning\n      ),\n      startWith(1),\n      map(() => {\n        this.currentContext = this.getScreenContext();\n        return this.currentContext;\n      }),\n      shareReplay(1),\n      takeUntil(this.destroyed$)\n    );\n    this.screenContext$.subscribe();\n  }\n\n  /** @ignored */\n  ngOnDestroy() {\n    this.destroyed$.next();\n    this.destroyed$.complete();\n  }\n\n  /**\n   * The list of available window segments.\n   */\n  get windowSegments(): DOMRect[] {\n    return this.currentContext.windowSegments;\n  }\n\n  /**\n   * The current screen spanning mode.\n   */\n  get screenSpanning(): ScreenSpanning {\n    return this.currentContext.screenSpanning;\n  }\n\n  /**\n   * True is current device have multiple screens available.\n   */\n  get isMultiScreen(): boolean {\n    return this.currentContext.isMultiScreen;\n  }\n\n  /**\n   * Gets an observable emitting when the screen context changes.\n   */\n  asObservable(): Observable<ScreenContextData> {\n    return this.screenContext$;\n  }\n\n  /**\n   * Gets the current screen context.\n   */\n  asObject(): ScreenContextData {\n    return this.currentContext;\n  }\n\n  private getScreenContext(): ScreenContextData {\n    const windowSegments = this.getWindowSegments();\n    const screenSpanning = this.getScreenSpanning();\n    return {\n      windowSegments,\n      screenSpanning,\n      isMultiScreen: screenSpanning !== ScreenSpanning.None,\n    };\n  }\n\n  private getScreenSpanning(): ScreenSpanning {\n    if (matchMedia(dualVerticalViewport).matches) {\n      return ScreenSpanning.DualVertical;\n    } else if (matchMedia(dualHorizontalViewport).matches) {\n      return ScreenSpanning.DualHorizontal;\n    }\n    return ScreenSpanning.None;\n  }\n\n  private getWindowSegments(): DOMRect[] {\n    if ('getWindowSegments' in window) {\n      console.warn('getWindowSegments() is not supported anymore, please update your browser to use the new visualViewport API');\n    }\n    if ('visualViewport' in window) {\n      return (window.visualViewport as any).segments;\n    }\n    return [\n      new DOMRect(\n        window.pageXOffset,\n        window.pageYOffset,\n        window.innerWidth,\n        window.innerHeight\n      ),\n    ];\n  }\n}\n"]}