a tool for shared writing and social publishing
leaflet.pub
1/*
2 * Copyright 2020 Adobe. All rights reserved.
3 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License. You may obtain a copy
5 * of the License at http://www.apache.org/licenses/LICENSE-2.0
6 *
7 * Unless required by applicable law or agreed to in writing, software distributed under
8 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
9 * OF ANY KIND, either express or implied. See the License for the specific language
10 * governing permissions and limitations under the License.
11 */
12
13function testUserAgent(re: RegExp) {
14 if (typeof window === "undefined" || window.navigator == null) {
15 return false;
16 }
17 return (
18 //@ts-ignore
19 window.navigator["userAgentData"]?.brands.some(
20 (brand: { brand: string; version: string }) => re.test(brand.brand),
21 ) || re.test(window.navigator.userAgent)
22 );
23}
24
25function testPlatform(re: RegExp) {
26 return typeof window !== "undefined" && window.navigator != null
27 ? re.test(
28 //@ts-ignore
29 window.navigator["userAgentData"]?.platform ||
30 window.navigator.platform,
31 )
32 : false;
33}
34
35function cached(fn: () => boolean) {
36 if (process.env.NODE_ENV === "test") {
37 return fn;
38 }
39
40 let res: boolean | null = null;
41 return () => {
42 if (res == null) {
43 res = fn();
44 }
45 return res;
46 };
47}
48
49export const isMac = cached(function () {
50 return testPlatform(/^Mac/i);
51});
52
53export const isIPhone = cached(function () {
54 return testPlatform(/^iPhone/i);
55});
56
57export const isIPad = cached(function () {
58 return (
59 testPlatform(/^iPad/i) ||
60 // iPadOS 13 lies and says it's a Mac, but we can distinguish by detecting touch support.
61 (isMac() && navigator.maxTouchPoints > 1)
62 );
63});
64
65export const isIOS = cached(function () {
66 return isIPhone() || isIPad();
67});
68
69export const isAppleDevice = cached(function () {
70 return isMac() || isIOS();
71});
72
73export const isWebKit = cached(function () {
74 return testUserAgent(/AppleWebKit/i) && !isChrome();
75});
76
77export const isChrome = cached(function () {
78 return testUserAgent(/Chrome/i);
79});
80
81export const isAndroid = cached(function () {
82 return testUserAgent(/Android/i);
83});
84
85export const isFirefox = cached(function () {
86 return testUserAgent(/Firefox/i);
87});