forked from CesiumGS/cesium
-
Notifications
You must be signed in to change notification settings - Fork 0
/
FeatureDetection.js
411 lines (365 loc) · 11.3 KB
/
FeatureDetection.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
import defaultValue from "./defaultValue.js";
import defined from "./defined.js";
import DeveloperError from "./DeveloperError.js";
import Fullscreen from "./Fullscreen.js";
let theNavigator;
if (typeof navigator !== "undefined") {
theNavigator = navigator;
} else {
theNavigator = {};
}
function extractVersion(versionString) {
const parts = versionString.split(".");
for (let i = 0, len = parts.length; i < len; ++i) {
parts[i] = parseInt(parts[i], 10);
}
return parts;
}
let isChromeResult;
let chromeVersionResult;
function isChrome() {
if (!defined(isChromeResult)) {
isChromeResult = false;
// Edge contains Chrome in the user agent too
if (!isEdge()) {
const fields = / Chrome\/([\.0-9]+)/.exec(theNavigator.userAgent);
if (fields !== null) {
isChromeResult = true;
chromeVersionResult = extractVersion(fields[1]);
}
}
}
return isChromeResult;
}
function chromeVersion() {
return isChrome() && chromeVersionResult;
}
let isSafariResult;
let safariVersionResult;
function isSafari() {
if (!defined(isSafariResult)) {
isSafariResult = false;
// Chrome and Edge contain Safari in the user agent too
if (
!isChrome() &&
!isEdge() &&
/ Safari\/[\.0-9]+/.test(theNavigator.userAgent)
) {
const fields = / Version\/([\.0-9]+)/.exec(theNavigator.userAgent);
if (fields !== null) {
isSafariResult = true;
safariVersionResult = extractVersion(fields[1]);
}
}
}
return isSafariResult;
}
function safariVersion() {
return isSafari() && safariVersionResult;
}
let isWebkitResult;
let webkitVersionResult;
function isWebkit() {
if (!defined(isWebkitResult)) {
isWebkitResult = false;
const fields = / AppleWebKit\/([\.0-9]+)(\+?)/.exec(theNavigator.userAgent);
if (fields !== null) {
isWebkitResult = true;
webkitVersionResult = extractVersion(fields[1]);
webkitVersionResult.isNightly = !!fields[2];
}
}
return isWebkitResult;
}
function webkitVersion() {
return isWebkit() && webkitVersionResult;
}
let isInternetExplorerResult;
let internetExplorerVersionResult;
function isInternetExplorer() {
if (!defined(isInternetExplorerResult)) {
isInternetExplorerResult = false;
let fields;
if (theNavigator.appName === "Microsoft Internet Explorer") {
fields = /MSIE ([0-9]{1,}[\.0-9]{0,})/.exec(theNavigator.userAgent);
if (fields !== null) {
isInternetExplorerResult = true;
internetExplorerVersionResult = extractVersion(fields[1]);
}
} else if (theNavigator.appName === "Netscape") {
fields = /Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/.exec(
theNavigator.userAgent
);
if (fields !== null) {
isInternetExplorerResult = true;
internetExplorerVersionResult = extractVersion(fields[1]);
}
}
}
return isInternetExplorerResult;
}
function internetExplorerVersion() {
return isInternetExplorer() && internetExplorerVersionResult;
}
let isEdgeResult;
let edgeVersionResult;
function isEdge() {
if (!defined(isEdgeResult)) {
isEdgeResult = false;
const fields = / Edg\/([\.0-9]+)/.exec(theNavigator.userAgent);
if (fields !== null) {
isEdgeResult = true;
edgeVersionResult = extractVersion(fields[1]);
}
}
return isEdgeResult;
}
function edgeVersion() {
return isEdge() && edgeVersionResult;
}
let isFirefoxResult;
let firefoxVersionResult;
function isFirefox() {
if (!defined(isFirefoxResult)) {
isFirefoxResult = false;
const fields = /Firefox\/([\.0-9]+)/.exec(theNavigator.userAgent);
if (fields !== null) {
isFirefoxResult = true;
firefoxVersionResult = extractVersion(fields[1]);
}
}
return isFirefoxResult;
}
let isWindowsResult;
function isWindows() {
if (!defined(isWindowsResult)) {
isWindowsResult = /Windows/i.test(theNavigator.appVersion);
}
return isWindowsResult;
}
let isIPadOrIOSResult;
function isIPadOrIOS() {
if (!defined(isIPadOrIOSResult)) {
isIPadOrIOSResult =
navigator.platform === "iPhone" ||
navigator.platform === "iPod" ||
navigator.platform === "iPad";
}
return isIPadOrIOSResult;
}
function firefoxVersion() {
return isFirefox() && firefoxVersionResult;
}
let hasPointerEvents;
function supportsPointerEvents() {
if (!defined(hasPointerEvents)) {
//While navigator.pointerEnabled is deprecated in the W3C specification
//we still need to use it if it exists in order to support browsers
//that rely on it, such as the Windows WebBrowser control which defines
//PointerEvent but sets navigator.pointerEnabled to false.
//Firefox disabled because of https://github.com/CesiumGS/cesium/issues/6372
hasPointerEvents =
!isFirefox() &&
typeof PointerEvent !== "undefined" &&
(!defined(theNavigator.pointerEnabled) || theNavigator.pointerEnabled);
}
return hasPointerEvents;
}
let imageRenderingValueResult;
let supportsImageRenderingPixelatedResult;
function supportsImageRenderingPixelated() {
if (!defined(supportsImageRenderingPixelatedResult)) {
const canvas = document.createElement("canvas");
canvas.setAttribute(
"style",
"image-rendering: -moz-crisp-edges;" + "image-rendering: pixelated;"
);
//canvas.style.imageRendering will be undefined, null or an empty string on unsupported browsers.
const tmp = canvas.style.imageRendering;
supportsImageRenderingPixelatedResult = defined(tmp) && tmp !== "";
if (supportsImageRenderingPixelatedResult) {
imageRenderingValueResult = tmp;
}
}
return supportsImageRenderingPixelatedResult;
}
function imageRenderingValue() {
return supportsImageRenderingPixelated()
? imageRenderingValueResult
: undefined;
}
function supportsWebP() {
//>>includeStart('debug', pragmas.debug);
if (!supportsWebP.initialized) {
throw new DeveloperError(
"You must call FeatureDetection.supportsWebP.initialize and wait for the promise to resolve before calling FeatureDetection.supportsWebP"
);
}
//>>includeEnd('debug');
return supportsWebP._result;
}
supportsWebP._promise = undefined;
supportsWebP._result = undefined;
supportsWebP.initialize = function () {
// From https://developers.google.com/speed/webp/faq#how_can_i_detect_browser_support_for_webp
if (defined(supportsWebP._promise)) {
return supportsWebP._promise;
}
supportsWebP._promise = new Promise((resolve) => {
const image = new Image();
image.onload = function () {
supportsWebP._result = image.width > 0 && image.height > 0;
resolve(supportsWebP._result);
};
image.onerror = function () {
supportsWebP._result = false;
resolve(supportsWebP._result);
};
image.src =
"data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA";
});
return supportsWebP._promise;
};
Object.defineProperties(supportsWebP, {
initialized: {
get: function () {
return defined(supportsWebP._result);
},
},
});
const typedArrayTypes = [];
if (typeof ArrayBuffer !== "undefined") {
typedArrayTypes.push(
Int8Array,
Uint8Array,
Int16Array,
Uint16Array,
Int32Array,
Uint32Array,
Float32Array,
Float64Array
);
if (typeof Uint8ClampedArray !== "undefined") {
typedArrayTypes.push(Uint8ClampedArray);
}
if (typeof Uint8ClampedArray !== "undefined") {
typedArrayTypes.push(Uint8ClampedArray);
}
if (typeof BigInt64Array !== "undefined") {
// eslint-disable-next-line no-undef
typedArrayTypes.push(BigInt64Array);
}
if (typeof BigUint64Array !== "undefined") {
// eslint-disable-next-line no-undef
typedArrayTypes.push(BigUint64Array);
}
}
/**
* A set of functions to detect whether the current browser supports
* various features.
*
* @namespace FeatureDetection
*/
const FeatureDetection = {
isChrome: isChrome,
chromeVersion: chromeVersion,
isSafari: isSafari,
safariVersion: safariVersion,
isWebkit: isWebkit,
webkitVersion: webkitVersion,
isInternetExplorer: isInternetExplorer,
internetExplorerVersion: internetExplorerVersion,
isEdge: isEdge,
edgeVersion: edgeVersion,
isFirefox: isFirefox,
firefoxVersion: firefoxVersion,
isWindows: isWindows,
isIPadOrIOS: isIPadOrIOS,
hardwareConcurrency: defaultValue(theNavigator.hardwareConcurrency, 3),
supportsPointerEvents: supportsPointerEvents,
supportsImageRenderingPixelated: supportsImageRenderingPixelated,
supportsWebP: supportsWebP,
imageRenderingValue: imageRenderingValue,
typedArrayTypes: typedArrayTypes,
};
/**
* Detects whether the current browser supports Basis Universal textures and the web assembly modules needed to transcode them.
*
* @param {Scene} scene
* @returns {Boolean} true if the browser supports web assembly modules and the scene supports Basis Universal textures, false if not.
*/
FeatureDetection.supportsBasis = function (scene) {
return FeatureDetection.supportsWebAssembly() && scene.context.supportsBasis;
};
/**
* Detects whether the current browser supports the full screen standard.
*
* @returns {Boolean} true if the browser supports the full screen standard, false if not.
*
* @see Fullscreen
* @see {@link http://dvcs.w3.org/hg/fullscreen/raw-file/tip/Overview.html|W3C Fullscreen Living Specification}
*/
FeatureDetection.supportsFullscreen = function () {
return Fullscreen.supportsFullscreen();
};
/**
* Detects whether the current browser supports typed arrays.
*
* @returns {Boolean} true if the browser supports typed arrays, false if not.
*
* @see {@link https://tc39.es/ecma262/#sec-typedarray-objects|Typed Array Specification}
*/
FeatureDetection.supportsTypedArrays = function () {
return typeof ArrayBuffer !== "undefined";
};
/**
* Detects whether the current browser supports BigInt64Array typed arrays.
*
* @returns {Boolean} true if the browser supports BigInt64Array typed arrays, false if not.
*
* @see {@link https://tc39.es/ecma262/#sec-typedarray-objects|Typed Array Specification}
*/
FeatureDetection.supportsBigInt64Array = function () {
return typeof BigInt64Array !== "undefined";
};
/**
* Detects whether the current browser supports BigUint64Array typed arrays.
*
* @returns {Boolean} true if the browser supports BigUint64Array typed arrays, false if not.
*
* @see {@link https://tc39.es/ecma262/#sec-typedarray-objects|Typed Array Specification}
*/
FeatureDetection.supportsBigUint64Array = function () {
return typeof BigUint64Array !== "undefined";
};
/**
* Detects whether the current browser supports BigInt.
*
* @returns {Boolean} true if the browser supports BigInt, false if not.
*
* @see {@link https://tc39.es/ecma262/#sec-bigint-objects|BigInt Specification}
*/
FeatureDetection.supportsBigInt = function () {
return typeof BigInt !== "undefined";
};
/**
* Detects whether the current browser supports Web Workers.
*
* @returns {Boolean} true if the browsers supports Web Workers, false if not.
*
* @see {@link http://www.w3.org/TR/workers/}
*/
FeatureDetection.supportsWebWorkers = function () {
return typeof Worker !== "undefined";
};
/**
* Detects whether the current browser supports Web Assembly.
*
* @returns {Boolean} true if the browsers supports Web Assembly, false if not.
*
* @see {@link https://developer.mozilla.org/en-US/docs/WebAssembly}
*/
FeatureDetection.supportsWebAssembly = function () {
return typeof WebAssembly !== "undefined";
};
export default FeatureDetection;