-
Notifications
You must be signed in to change notification settings - Fork 0
/
polyfill.js
1392 lines (1307 loc) · 42.5 KB
/
polyfill.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
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/******/ (() => { // webpackBootstrap
/******/ var __webpack_modules__ = ({
/***/ 935:
/***/ (function(module, exports) {
var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;(function (global, factory) {
if (true) {
!(__WEBPACK_AMD_DEFINE_ARRAY__ = [module], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory),
__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
(__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__),
__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
} else { var mod; }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (module) {
/* webextension-polyfill - v0.8.0 - Tue Apr 20 2021 11:27:38 */
/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set sts=2 sw=2 et tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
if (typeof browser === "undefined" || Object.getPrototypeOf(browser) !== Object.prototype) {
const CHROME_SEND_MESSAGE_CALLBACK_NO_RESPONSE_MESSAGE = "The message port closed before a response was received.";
const SEND_RESPONSE_DEPRECATION_WARNING = "Returning a Promise is the preferred way to send a reply from an onMessage/onMessageExternal listener, as the sendResponse will be removed from the specs (See https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/runtime/onMessage)"; // Wrapping the bulk of this polyfill in a one-time-use function is a minor
// optimization for Firefox. Since Spidermonkey does not fully parse the
// contents of a function until the first time it's called, and since it will
// never actually need to be called, this allows the polyfill to be included
// in Firefox nearly for free.
const wrapAPIs = extensionAPIs => {
// NOTE: apiMetadata is associated to the content of the api-metadata.json file
// at build time by replacing the following "include" with the content of the
// JSON file.
const apiMetadata = {
"alarms": {
"clear": {
"minArgs": 0,
"maxArgs": 1
},
"clearAll": {
"minArgs": 0,
"maxArgs": 0
},
"get": {
"minArgs": 0,
"maxArgs": 1
},
"getAll": {
"minArgs": 0,
"maxArgs": 0
}
},
"bookmarks": {
"create": {
"minArgs": 1,
"maxArgs": 1
},
"get": {
"minArgs": 1,
"maxArgs": 1
},
"getChildren": {
"minArgs": 1,
"maxArgs": 1
},
"getRecent": {
"minArgs": 1,
"maxArgs": 1
},
"getSubTree": {
"minArgs": 1,
"maxArgs": 1
},
"getTree": {
"minArgs": 0,
"maxArgs": 0
},
"move": {
"minArgs": 2,
"maxArgs": 2
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"removeTree": {
"minArgs": 1,
"maxArgs": 1
},
"search": {
"minArgs": 1,
"maxArgs": 1
},
"update": {
"minArgs": 2,
"maxArgs": 2
}
},
"browserAction": {
"disable": {
"minArgs": 0,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"enable": {
"minArgs": 0,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"getBadgeBackgroundColor": {
"minArgs": 1,
"maxArgs": 1
},
"getBadgeText": {
"minArgs": 1,
"maxArgs": 1
},
"getPopup": {
"minArgs": 1,
"maxArgs": 1
},
"getTitle": {
"minArgs": 1,
"maxArgs": 1
},
"openPopup": {
"minArgs": 0,
"maxArgs": 0
},
"setBadgeBackgroundColor": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"setBadgeText": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"setIcon": {
"minArgs": 1,
"maxArgs": 1
},
"setPopup": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"setTitle": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
}
},
"browsingData": {
"remove": {
"minArgs": 2,
"maxArgs": 2
},
"removeCache": {
"minArgs": 1,
"maxArgs": 1
},
"removeCookies": {
"minArgs": 1,
"maxArgs": 1
},
"removeDownloads": {
"minArgs": 1,
"maxArgs": 1
},
"removeFormData": {
"minArgs": 1,
"maxArgs": 1
},
"removeHistory": {
"minArgs": 1,
"maxArgs": 1
},
"removeLocalStorage": {
"minArgs": 1,
"maxArgs": 1
},
"removePasswords": {
"minArgs": 1,
"maxArgs": 1
},
"removePluginData": {
"minArgs": 1,
"maxArgs": 1
},
"settings": {
"minArgs": 0,
"maxArgs": 0
}
},
"commands": {
"getAll": {
"minArgs": 0,
"maxArgs": 0
}
},
"contextMenus": {
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"removeAll": {
"minArgs": 0,
"maxArgs": 0
},
"update": {
"minArgs": 2,
"maxArgs": 2
}
},
"cookies": {
"get": {
"minArgs": 1,
"maxArgs": 1
},
"getAll": {
"minArgs": 1,
"maxArgs": 1
},
"getAllCookieStores": {
"minArgs": 0,
"maxArgs": 0
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"set": {
"minArgs": 1,
"maxArgs": 1
}
},
"devtools": {
"inspectedWindow": {
"eval": {
"minArgs": 1,
"maxArgs": 2,
"singleCallbackArg": false
}
},
"panels": {
"create": {
"minArgs": 3,
"maxArgs": 3,
"singleCallbackArg": true
},
"elements": {
"createSidebarPane": {
"minArgs": 1,
"maxArgs": 1
}
}
}
},
"downloads": {
"cancel": {
"minArgs": 1,
"maxArgs": 1
},
"download": {
"minArgs": 1,
"maxArgs": 1
},
"erase": {
"minArgs": 1,
"maxArgs": 1
},
"getFileIcon": {
"minArgs": 1,
"maxArgs": 2
},
"open": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"pause": {
"minArgs": 1,
"maxArgs": 1
},
"removeFile": {
"minArgs": 1,
"maxArgs": 1
},
"resume": {
"minArgs": 1,
"maxArgs": 1
},
"search": {
"minArgs": 1,
"maxArgs": 1
},
"show": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
}
},
"extension": {
"isAllowedFileSchemeAccess": {
"minArgs": 0,
"maxArgs": 0
},
"isAllowedIncognitoAccess": {
"minArgs": 0,
"maxArgs": 0
}
},
"history": {
"addUrl": {
"minArgs": 1,
"maxArgs": 1
},
"deleteAll": {
"minArgs": 0,
"maxArgs": 0
},
"deleteRange": {
"minArgs": 1,
"maxArgs": 1
},
"deleteUrl": {
"minArgs": 1,
"maxArgs": 1
},
"getVisits": {
"minArgs": 1,
"maxArgs": 1
},
"search": {
"minArgs": 1,
"maxArgs": 1
}
},
"i18n": {
"detectLanguage": {
"minArgs": 1,
"maxArgs": 1
},
"getAcceptLanguages": {
"minArgs": 0,
"maxArgs": 0
}
},
"identity": {
"launchWebAuthFlow": {
"minArgs": 1,
"maxArgs": 1
}
},
"idle": {
"queryState": {
"minArgs": 1,
"maxArgs": 1
}
},
"management": {
"get": {
"minArgs": 1,
"maxArgs": 1
},
"getAll": {
"minArgs": 0,
"maxArgs": 0
},
"getSelf": {
"minArgs": 0,
"maxArgs": 0
},
"setEnabled": {
"minArgs": 2,
"maxArgs": 2
},
"uninstallSelf": {
"minArgs": 0,
"maxArgs": 1
}
},
"notifications": {
"clear": {
"minArgs": 1,
"maxArgs": 1
},
"create": {
"minArgs": 1,
"maxArgs": 2
},
"getAll": {
"minArgs": 0,
"maxArgs": 0
},
"getPermissionLevel": {
"minArgs": 0,
"maxArgs": 0
},
"update": {
"minArgs": 2,
"maxArgs": 2
}
},
"pageAction": {
"getPopup": {
"minArgs": 1,
"maxArgs": 1
},
"getTitle": {
"minArgs": 1,
"maxArgs": 1
},
"hide": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"setIcon": {
"minArgs": 1,
"maxArgs": 1
},
"setPopup": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"setTitle": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
},
"show": {
"minArgs": 1,
"maxArgs": 1,
"fallbackToNoCallback": true
}
},
"permissions": {
"contains": {
"minArgs": 1,
"maxArgs": 1
},
"getAll": {
"minArgs": 0,
"maxArgs": 0
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"request": {
"minArgs": 1,
"maxArgs": 1
}
},
"runtime": {
"getBackgroundPage": {
"minArgs": 0,
"maxArgs": 0
},
"getPlatformInfo": {
"minArgs": 0,
"maxArgs": 0
},
"openOptionsPage": {
"minArgs": 0,
"maxArgs": 0
},
"requestUpdateCheck": {
"minArgs": 0,
"maxArgs": 0
},
"sendMessage": {
"minArgs": 1,
"maxArgs": 3
},
"sendNativeMessage": {
"minArgs": 2,
"maxArgs": 2
},
"setUninstallURL": {
"minArgs": 1,
"maxArgs": 1
}
},
"sessions": {
"getDevices": {
"minArgs": 0,
"maxArgs": 1
},
"getRecentlyClosed": {
"minArgs": 0,
"maxArgs": 1
},
"restore": {
"minArgs": 0,
"maxArgs": 1
}
},
"storage": {
"local": {
"clear": {
"minArgs": 0,
"maxArgs": 0
},
"get": {
"minArgs": 0,
"maxArgs": 1
},
"getBytesInUse": {
"minArgs": 0,
"maxArgs": 1
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"set": {
"minArgs": 1,
"maxArgs": 1
}
},
"managed": {
"get": {
"minArgs": 0,
"maxArgs": 1
},
"getBytesInUse": {
"minArgs": 0,
"maxArgs": 1
}
},
"sync": {
"clear": {
"minArgs": 0,
"maxArgs": 0
},
"get": {
"minArgs": 0,
"maxArgs": 1
},
"getBytesInUse": {
"minArgs": 0,
"maxArgs": 1
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"set": {
"minArgs": 1,
"maxArgs": 1
}
}
},
"tabs": {
"captureVisibleTab": {
"minArgs": 0,
"maxArgs": 2
},
"create": {
"minArgs": 1,
"maxArgs": 1
},
"detectLanguage": {
"minArgs": 0,
"maxArgs": 1
},
"discard": {
"minArgs": 0,
"maxArgs": 1
},
"duplicate": {
"minArgs": 1,
"maxArgs": 1
},
"executeScript": {
"minArgs": 1,
"maxArgs": 2
},
"get": {
"minArgs": 1,
"maxArgs": 1
},
"getCurrent": {
"minArgs": 0,
"maxArgs": 0
},
"getZoom": {
"minArgs": 0,
"maxArgs": 1
},
"getZoomSettings": {
"minArgs": 0,
"maxArgs": 1
},
"goBack": {
"minArgs": 0,
"maxArgs": 1
},
"goForward": {
"minArgs": 0,
"maxArgs": 1
},
"highlight": {
"minArgs": 1,
"maxArgs": 1
},
"insertCSS": {
"minArgs": 1,
"maxArgs": 2
},
"move": {
"minArgs": 2,
"maxArgs": 2
},
"query": {
"minArgs": 1,
"maxArgs": 1
},
"reload": {
"minArgs": 0,
"maxArgs": 2
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"removeCSS": {
"minArgs": 1,
"maxArgs": 2
},
"sendMessage": {
"minArgs": 2,
"maxArgs": 3
},
"setZoom": {
"minArgs": 1,
"maxArgs": 2
},
"setZoomSettings": {
"minArgs": 1,
"maxArgs": 2
},
"update": {
"minArgs": 1,
"maxArgs": 2
}
},
"topSites": {
"get": {
"minArgs": 0,
"maxArgs": 0
}
},
"webNavigation": {
"getAllFrames": {
"minArgs": 1,
"maxArgs": 1
},
"getFrame": {
"minArgs": 1,
"maxArgs": 1
}
},
"webRequest": {
"handlerBehaviorChanged": {
"minArgs": 0,
"maxArgs": 0
}
},
"windows": {
"create": {
"minArgs": 0,
"maxArgs": 1
},
"get": {
"minArgs": 1,
"maxArgs": 2
},
"getAll": {
"minArgs": 0,
"maxArgs": 1
},
"getCurrent": {
"minArgs": 0,
"maxArgs": 1
},
"getLastFocused": {
"minArgs": 0,
"maxArgs": 1
},
"remove": {
"minArgs": 1,
"maxArgs": 1
},
"update": {
"minArgs": 2,
"maxArgs": 2
}
}
};
if (Object.keys(apiMetadata).length === 0) {
throw new Error("api-metadata.json has not been included in browser-polyfill");
}
/**
* A WeakMap subclass which creates and stores a value for any key which does
* not exist when accessed, but behaves exactly as an ordinary WeakMap
* otherwise.
*
* @param {function} createItem
* A function which will be called in order to create the value for any
* key which does not exist, the first time it is accessed. The
* function receives, as its only argument, the key being created.
*/
class DefaultWeakMap extends WeakMap {
constructor(createItem, items = undefined) {
super(items);
this.createItem = createItem;
}
get(key) {
if (!this.has(key)) {
this.set(key, this.createItem(key));
}
return super.get(key);
}
}
/**
* Returns true if the given object is an object with a `then` method, and can
* therefore be assumed to behave as a Promise.
*
* @param {*} value The value to test.
* @returns {boolean} True if the value is thenable.
*/
const isThenable = value => {
return value && typeof value === "object" && typeof value.then === "function";
};
/**
* Creates and returns a function which, when called, will resolve or reject
* the given promise based on how it is called:
*
* - If, when called, `chrome.runtime.lastError` contains a non-null object,
* the promise is rejected with that value.
* - If the function is called with exactly one argument, the promise is
* resolved to that value.
* - Otherwise, the promise is resolved to an array containing all of the
* function's arguments.
*
* @param {object} promise
* An object containing the resolution and rejection functions of a
* promise.
* @param {function} promise.resolve
* The promise's resolution function.
* @param {function} promise.reject
* The promise's rejection function.
* @param {object} metadata
* Metadata about the wrapped method which has created the callback.
* @param {boolean} metadata.singleCallbackArg
* Whether or not the promise is resolved with only the first
* argument of the callback, alternatively an array of all the
* callback arguments is resolved. By default, if the callback
* function is invoked with only a single argument, that will be
* resolved to the promise, while all arguments will be resolved as
* an array if multiple are given.
*
* @returns {function}
* The generated callback function.
*/
const makeCallback = (promise, metadata) => {
return (...callbackArgs) => {
if (extensionAPIs.runtime.lastError) {
promise.reject(new Error(extensionAPIs.runtime.lastError.message));
} else if (metadata.singleCallbackArg || callbackArgs.length <= 1 && metadata.singleCallbackArg !== false) {
promise.resolve(callbackArgs[0]);
} else {
promise.resolve(callbackArgs);
}
};
};
const pluralizeArguments = numArgs => numArgs == 1 ? "argument" : "arguments";
/**
* Creates a wrapper function for a method with the given name and metadata.
*
* @param {string} name
* The name of the method which is being wrapped.
* @param {object} metadata
* Metadata about the method being wrapped.
* @param {integer} metadata.minArgs
* The minimum number of arguments which must be passed to the
* function. If called with fewer than this number of arguments, the
* wrapper will raise an exception.
* @param {integer} metadata.maxArgs
* The maximum number of arguments which may be passed to the
* function. If called with more than this number of arguments, the
* wrapper will raise an exception.
* @param {boolean} metadata.singleCallbackArg
* Whether or not the promise is resolved with only the first
* argument of the callback, alternatively an array of all the
* callback arguments is resolved. By default, if the callback
* function is invoked with only a single argument, that will be
* resolved to the promise, while all arguments will be resolved as
* an array if multiple are given.
*
* @returns {function(object, ...*)}
* The generated wrapper function.
*/
const wrapAsyncFunction = (name, metadata) => {
return function asyncFunctionWrapper(target, ...args) {
if (args.length < metadata.minArgs) {
throw new Error(`Expected at least ${metadata.minArgs} ${pluralizeArguments(metadata.minArgs)} for ${name}(), got ${args.length}`);
}
if (args.length > metadata.maxArgs) {
throw new Error(`Expected at most ${metadata.maxArgs} ${pluralizeArguments(metadata.maxArgs)} for ${name}(), got ${args.length}`);
}
return new Promise((resolve, reject) => {
if (metadata.fallbackToNoCallback) {
// This API method has currently no callback on Chrome, but it return a promise on Firefox,
// and so the polyfill will try to call it with a callback first, and it will fallback
// to not passing the callback if the first call fails.
try {
target[name](...args, makeCallback({
resolve,
reject
}, metadata));
} catch (cbError) {
console.warn(`${name} API method doesn't seem to support the callback parameter, ` + "falling back to call it without a callback: ", cbError);
target[name](...args); // Update the API method metadata, so that the next API calls will not try to
// use the unsupported callback anymore.
metadata.fallbackToNoCallback = false;
metadata.noCallback = true;
resolve();
}
} else if (metadata.noCallback) {
target[name](...args);
resolve();
} else {
target[name](...args, makeCallback({
resolve,
reject
}, metadata));
}
});
};
};
/**
* Wraps an existing method of the target object, so that calls to it are
* intercepted by the given wrapper function. The wrapper function receives,
* as its first argument, the original `target` object, followed by each of
* the arguments passed to the original method.
*
* @param {object} target
* The original target object that the wrapped method belongs to.
* @param {function} method
* The method being wrapped. This is used as the target of the Proxy
* object which is created to wrap the method.
* @param {function} wrapper
* The wrapper function which is called in place of a direct invocation
* of the wrapped method.
*
* @returns {Proxy<function>}
* A Proxy object for the given method, which invokes the given wrapper
* method in its place.
*/
const wrapMethod = (target, method, wrapper) => {
return new Proxy(method, {
apply(targetMethod, thisObj, args) {
return wrapper.call(thisObj, target, ...args);
}
});
};
let hasOwnProperty = Function.call.bind(Object.prototype.hasOwnProperty);
/**
* Wraps an object in a Proxy which intercepts and wraps certain methods
* based on the given `wrappers` and `metadata` objects.
*
* @param {object} target
* The target object to wrap.
*
* @param {object} [wrappers = {}]
* An object tree containing wrapper functions for special cases. Any
* function present in this object tree is called in place of the
* method in the same location in the `target` object tree. These
* wrapper methods are invoked as described in {@see wrapMethod}.
*
* @param {object} [metadata = {}]
* An object tree containing metadata used to automatically generate
* Promise-based wrapper functions for asynchronous. Any function in
* the `target` object tree which has a corresponding metadata object
* in the same location in the `metadata` tree is replaced with an
* automatically-generated wrapper function, as described in
* {@see wrapAsyncFunction}
*
* @returns {Proxy<object>}
*/
const wrapObject = (target, wrappers = {}, metadata = {}) => {
let cache = Object.create(null);
let handlers = {
has(proxyTarget, prop) {
return prop in target || prop in cache;
},
get(proxyTarget, prop, receiver) {
if (prop in cache) {
return cache[prop];
}
if (!(prop in target)) {
return undefined;
}
let value = target[prop];
if (typeof value === "function") {
// This is a method on the underlying object. Check if we need to do
// any wrapping.
if (typeof wrappers[prop] === "function") {
// We have a special-case wrapper for this method.
value = wrapMethod(target, target[prop], wrappers[prop]);
} else if (hasOwnProperty(metadata, prop)) {
// This is an async method that we have metadata for. Create a
// Promise wrapper for it.
let wrapper = wrapAsyncFunction(prop, metadata[prop]);
value = wrapMethod(target, target[prop], wrapper);
} else {
// This is a method that we don't know or care about. Return the
// original method, bound to the underlying object.
value = value.bind(target);
}
} else if (typeof value === "object" && value !== null && (hasOwnProperty(wrappers, prop) || hasOwnProperty(metadata, prop))) {
// This is an object that we need to do some wrapping for the children
// of. Create a sub-object wrapper for it with the appropriate child
// metadata.
value = wrapObject(value, wrappers[prop], metadata[prop]);
} else if (hasOwnProperty(metadata, "*")) {
// Wrap all properties in * namespace.
value = wrapObject(value, wrappers[prop], metadata["*"]);
} else {
// We don't need to do any wrapping for this property,
// so just forward all access to the underlying object.
Object.defineProperty(cache, prop, {
configurable: true,
enumerable: true,
get() {
return target[prop];
},
set(value) {
target[prop] = value;
}
});
return value;
}
cache[prop] = value;
return value;
},
set(proxyTarget, prop, value, receiver) {
if (prop in cache) {
cache[prop] = value;
} else {
target[prop] = value;
}
return true;
},
defineProperty(proxyTarget, prop, desc) {
return Reflect.defineProperty(cache, prop, desc);
},