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The V8 check\n// is necessary to detect all Blink based browsers.\nlet hasV8BreakIterator: boolean;\n\n// We need a try/catch around the reference to `Intl`, because accessing it in some cases can\n// cause IE to throw. These cases are tied to particular versions of Windows and can happen if\n// the consumer is providing a polyfilled `Map`. See:\n// https://github.com/Microsoft/ChakraCore/issues/3189\n// https://github.com/angular/components/issues/15687\ntry {\n hasV8BreakIterator = (typeof Intl !== 'undefined' && (Intl as any).v8BreakIterator);\n} catch {\n hasV8BreakIterator = false;\n}\n\n/**\n * Service to detect the current platform by comparing the userAgent strings and\n * checking browser-specific global properties.\n */\n@Injectable({ providedIn: 'root' })\nexport class Platform {\n // We want to use the Angular platform check because if the Document is shimmed\n // without the navigator, the following checks will fail. This is preferred because\n // sometimes the Document may be shimmed without the user's knowledge or intention\n /** Whether the Angular application is being rendered in the browser. */\n isBrowser: boolean = this._platformId ?\n isPlatformBrowser(this._platformId) : typeof document === 'object' && !!document;\n\n /** Whether the current browser is Microsoft Edge. */\n EDGE: boolean = this.isBrowser && /(edge)/i.test(navigator.userAgent);\n\n /** Whether the current rendering engine is Microsoft Trident. */\n TRIDENT: boolean = this.isBrowser && /(msie|trident)/i.test(navigator.userAgent);\n\n // EdgeHTML and Trident mock Blink specific things and need to be excluded from this check.\n /** Whether the current rendering engine is Blink. */\n BLINK: boolean = this.isBrowser && (!!((window as any).chrome || hasV8BreakIterator) &&\n typeof CSS !== 'undefined' && !this.EDGE && !this.TRIDENT);\n\n // Webkit is part of the userAgent in EdgeHTML, Blink and Trident. Therefore we need to\n // ensure that Webkit runs standalone and is not used as another engine's base.\n /** Whether the current rendering engine is WebKit. */\n WEBKIT: boolean = this.isBrowser &&\n /AppleWebKit/i.test(navigator.userAgent) && !this.BLINK && !this.EDGE && !this.TRIDENT;\n\n /** Whether the current platform is Apple iOS. */\n IOS: boolean = this.isBrowser && /iPad|iPhone|iPod/.test(navigator.userAgent) &&\n !('MSStream' in window);\n\n // It's difficult to detect the plain Gecko engine, because most of the browsers identify\n // them self as Gecko-like browsers and modify the userAgent's according to that.\n // Since we only cover one explicit Firefox case, we can simply check for Firefox\n // instead of having an unstable check for Gecko.\n /** Whether the current browser is Firefox. */\n FIREFOX: boolean = this.isBrowser && /(firefox|minefield)/i.test(navigator.userAgent);\n\n /** Whether the current platform is Android. */\n // Trident on mobile adds the android platform to the userAgent to trick detections.\n ANDROID: boolean = this.isBrowser && /android/i.test(navigator.userAgent) && !this.TRIDENT;\n\n // Safari browsers will include the Safari keyword in their userAgent. Some browsers may fake\n // this and just place the Safari keyword in the userAgent. To be more safe about Safari every\n // Safari browser should also use Webkit as its layout engine.\n /** Whether the current browser is Safari. */\n SAFARI: boolean = this.isBrowser && /safari/i.test(navigator.userAgent) && this.WEBKIT;\n\n constructor(@Inject(PLATFORM_ID) private _platformId: Object) {\n }\n}\n"]} |