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6d6f0db0 SR |
1 | /* |
2 | * noVNC: HTML5 VNC client | |
84586c0f | 3 | * Copyright (C) 2018 The noVNC Authors |
6d6f0db0 SR |
4 | * Licensed under MPL 2.0 (see LICENSE.txt) |
5 | * | |
6 | * See README.md for usage and integration instructions. | |
7 | */ | |
8 | ||
9 | import * as Log from './logging.js'; | |
10 | ||
6d6f0db0 | 11 | // Touch detection |
2b5f94fa | 12 | export let isTouchDevice = ('ontouchstart' in document.documentElement) || |
6d6f0db0 SR |
13 | // requried for Chrome debugger |
14 | (document.ontouchstart !== undefined) || | |
15 | // required for MS Surface | |
16 | (navigator.maxTouchPoints > 0) || | |
17 | (navigator.msMaxTouchPoints > 0); | |
18 | window.addEventListener('touchstart', function onFirstTouch() { | |
19 | isTouchDevice = true; | |
20 | window.removeEventListener('touchstart', onFirstTouch, false); | |
21 | }, false); | |
22 | ||
3b7c4741 SM |
23 | |
24 | // The goal is to find a certain physical width, the devicePixelRatio | |
25 | // brings us a bit closer but is not optimal. | |
26 | export let dragThreshold = 10 * (window.devicePixelRatio || 1); | |
27 | ||
2b5f94fa | 28 | let _cursor_uris_supported = null; |
6d6f0db0 | 29 | |
2c5491e1 | 30 | export function supportsCursorURIs() { |
6d6f0db0 SR |
31 | if (_cursor_uris_supported === null) { |
32 | try { | |
2b5f94fa | 33 | const target = document.createElement('canvas'); |
6d6f0db0 SR |
34 | target.style.cursor = 'url("data:image/x-icon;base64,AAACAAEACAgAAAIAAgA4AQAAFgAAACgAAAAIAAAAEAAAAAEAIAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////AAAAAAAAAAAAAAAAAAAAAA==") 2 2, default'; |
35 | ||
36 | if (target.style.cursor) { | |
37 | Log.Info("Data URI scheme cursor supported"); | |
38 | _cursor_uris_supported = true; | |
39 | } else { | |
40 | Log.Warn("Data URI scheme cursor not supported"); | |
41 | _cursor_uris_supported = false; | |
42 | } | |
43 | } catch (exc) { | |
44 | Log.Error("Data URI scheme cursor test exception: " + exc); | |
45 | _cursor_uris_supported = false; | |
46 | } | |
47 | } | |
48 | ||
49 | return _cursor_uris_supported; | |
8727f598 | 50 | } |
59ef2916 JD |
51 | |
52 | export function isMac() { | |
53 | return navigator && !!(/mac/i).exec(navigator.platform); | |
54 | } | |
55 | ||
97e23ebb SM |
56 | export function isWindows() { |
57 | return navigator && !!(/win/i).exec(navigator.platform); | |
58 | } | |
59 | ||
60 | export function isIOS() { | |
61 | return navigator && | |
62 | (!!(/ipad/i).exec(navigator.platform) || | |
63 | !!(/iphone/i).exec(navigator.platform) || | |
64 | !!(/ipod/i).exec(navigator.platform)); | |
65 | } | |
66 | ||
47b3eac8 SM |
67 | export function isSafari() { |
68 | return navigator && (navigator.userAgent.indexOf('Safari') !== -1 && | |
69 | navigator.userAgent.indexOf('Chrome') === -1); | |
70 | } | |
71 | ||
59ef2916 JD |
72 | export function isIE() { |
73 | return navigator && !!(/trident/i).exec(navigator.userAgent); | |
74 | } | |
75 | ||
76 | export function isEdge() { | |
77 | return navigator && !!(/edge/i).exec(navigator.userAgent); | |
78 | } | |
79 | ||
3a7c0c67 PO |
80 | export function isFirefox() { |
81 | return navigator && !!(/firefox/i).exec(navigator.userAgent); | |
82 | } | |
83 |