forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 2
/
WebContentConverter.js
948 lines (845 loc) · 32.4 KB
/
WebContentConverter.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
# -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is the Web Content Converter System.
#
# The Initial Developer of the Original Code is Google Inc.
# Portions created by the Initial Developer are Copyright (C) 2006
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Ben Goodger <beng@google.com>
# Asaf Romano <mano@mozilla.com>
# Dan Mosedale <dmose@mozilla.org>
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK ***** */
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
function LOG(str) {
dump("*** " + str + "\n");
}
const WCCR_CONTRACTID = "@mozilla.org/embeddor.implemented/web-content-handler-registrar;1";
const WCCR_CLASSID = Components.ID("{792a7e82-06a0-437c-af63-b2d12e808acc}");
const WCC_CLASSID = Components.ID("{db7ebf28-cc40-415f-8a51-1b111851df1e}");
const WCC_CLASSNAME = "Web Service Handler";
const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
const TYPE_ANY = "*/*";
const PREF_CONTENTHANDLERS_AUTO = "browser.contentHandlers.auto.";
const PREF_CONTENTHANDLERS_BRANCH = "browser.contentHandlers.types.";
const PREF_SELECTED_WEB = "browser.feeds.handlers.webservice";
const PREF_SELECTED_ACTION = "browser.feeds.handler";
const PREF_SELECTED_READER = "browser.feeds.handler.default";
const PREF_HANDLER_EXTERNAL_PREFIX = "network.protocol-handler.external";
const PREF_ALLOW_DIFFERENT_HOST = "gecko.handlerService.allowRegisterFromDifferentHost";
const STRING_BUNDLE_URI = "chrome://browser/locale/feeds/subscribe.properties";
const NS_ERROR_MODULE_DOM = 2152923136;
const NS_ERROR_DOM_SYNTAX_ERR = NS_ERROR_MODULE_DOM + 12;
function WebContentConverter() {
}
WebContentConverter.prototype = {
convert: function WCC_convert() { },
asyncConvertData: function WCC_asyncConvertData() { },
onDataAvailable: function WCC_onDataAvailable() { },
onStopRequest: function WCC_onStopRequest() { },
onStartRequest: function WCC_onStartRequest(request, context) {
var wccr =
Cc[WCCR_CONTRACTID].
getService(Ci.nsIWebContentConverterService);
wccr.loadPreferredHandler(request);
},
QueryInterface: function WCC_QueryInterface(iid) {
if (iid.equals(Ci.nsIStreamConverter) ||
iid.equals(Ci.nsIStreamListener) ||
iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
var WebContentConverterFactory = {
createInstance: function WCCF_createInstance(outer, iid) {
if (outer != null)
throw Cr.NS_ERROR_NO_AGGREGATION;
return new WebContentConverter().QueryInterface(iid);
},
QueryInterface: function WCC_QueryInterface(iid) {
if (iid.equals(Ci.nsIFactory) ||
iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
function ServiceInfo(contentType, uri, name) {
this._contentType = contentType;
this._uri = uri;
this._name = name;
}
ServiceInfo.prototype = {
/**
* See nsIHandlerApp
*/
get name() {
return this._name;
},
/**
* See nsIHandlerApp
*/
equals: function SI_equals(aHandlerApp) {
if (!aHandlerApp)
throw Cr.NS_ERROR_NULL_POINTER;
if (aHandlerApp instanceof Ci.nsIWebContentHandlerInfo &&
aHandlerApp.contentType == this.contentType &&
aHandlerApp.uri == this.uri)
return true;
return false;
},
/**
* See nsIWebContentHandlerInfo
*/
get contentType() {
return this._contentType;
},
/**
* See nsIWebContentHandlerInfo
*/
get uri() {
return this._uri;
},
/**
* See nsIWebContentHandlerInfo
*/
getHandlerURI: function SI_getHandlerURI(uri) {
return this._uri.replace(/%s/gi, encodeURIComponent(uri));
},
QueryInterface: function SI_QueryInterface(iid) {
if (iid.equals(Ci.nsIWebContentHandlerInfo) ||
iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
function WebContentConverterRegistrar() {
this._contentTypes = { };
this._autoHandleContentTypes = { };
}
WebContentConverterRegistrar.prototype = {
get stringBundle() {
var sb = Cc["@mozilla.org/intl/stringbundle;1"].
getService(Ci.nsIStringBundleService).
createBundle(STRING_BUNDLE_URI);
delete WebContentConverterRegistrar.prototype.stringBundle;
return WebContentConverterRegistrar.prototype.stringBundle = sb;
},
_getFormattedString: function WCCR__getFormattedString(key, params) {
return this.stringBundle.formatStringFromName(key, params, params.length);
},
_getString: function WCCR_getString(key) {
return this.stringBundle.GetStringFromName(key);
},
/**
* See nsIWebContentConverterService
*/
getAutoHandler:
function WCCR_getAutoHandler(contentType) {
contentType = this._resolveContentType(contentType);
if (contentType in this._autoHandleContentTypes)
return this._autoHandleContentTypes[contentType];
return null;
},
/**
* See nsIWebContentConverterService
*/
setAutoHandler:
function WCCR_setAutoHandler(contentType, handler) {
if (handler && !this._typeIsRegistered(contentType, handler.uri))
throw Cr.NS_ERROR_NOT_AVAILABLE;
contentType = this._resolveContentType(contentType);
this._setAutoHandler(contentType, handler);
var ps =
Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
var autoBranch = ps.getBranch(PREF_CONTENTHANDLERS_AUTO);
if (handler)
autoBranch.setCharPref(contentType, handler.uri);
else if (autoBranch.prefHasUserValue(contentType))
autoBranch.clearUserPref(contentType);
ps.savePrefFile(null);
},
/**
* Update the internal data structure (not persistent)
*/
_setAutoHandler:
function WCCR__setAutoHandler(contentType, handler) {
if (handler)
this._autoHandleContentTypes[contentType] = handler;
else if (contentType in this._autoHandleContentTypes)
delete this._autoHandleContentTypes[contentType];
},
/**
* See nsIWebContentConverterService
*/
getWebContentHandlerByURI:
function WCCR_getWebContentHandlerByURI(contentType, uri) {
var handlers = this.getContentHandlers(contentType, { });
for (var i = 0; i < handlers.length; ++i) {
if (handlers[i].uri == uri)
return handlers[i];
}
return null;
},
/**
* See nsIWebContentConverterService
*/
loadPreferredHandler:
function WCCR_loadPreferredHandler(request) {
var channel = request.QueryInterface(Ci.nsIChannel);
var contentType = this._resolveContentType(channel.contentType);
var handler = this.getAutoHandler(contentType);
if (handler) {
request.cancel(Cr.NS_ERROR_FAILURE);
var webNavigation =
channel.notificationCallbacks.getInterface(Ci.nsIWebNavigation);
webNavigation.loadURI(handler.getHandlerURI(channel.URI.spec),
Ci.nsIWebNavigation.LOAD_FLAGS_NONE,
null, null, null);
}
},
/**
* See nsIWebContentConverterService
*/
removeProtocolHandler:
function WCCR_removeProtocolHandler(aProtocol, aURITemplate) {
var eps = Cc["@mozilla.org/uriloader/external-protocol-service;1"].
getService(Ci.nsIExternalProtocolService);
var handlerInfo = eps.getProtocolHandlerInfo(aProtocol);
var handlers = handlerInfo.possibleApplicationHandlers;
for (let i = 0; i < handlers.length; i++) {
try { // We only want to test web handlers
let handler = handlers.queryElementAt(i, Ci.nsIWebHandlerApp);
if (handler.uriTemplate == aURITemplate) {
handlers.removeElementAt(i);
var hs = Cc["@mozilla.org/uriloader/handler-service;1"].
getService(Ci.nsIHandlerService);
hs.store(handlerInfo);
return;
}
} catch (e) { /* it wasn't a web handler */ }
}
},
/**
* See nsIWebContentConverterService
*/
removeContentHandler:
function WCCR_removeContentHandler(contentType, uri) {
function notURI(serviceInfo) {
return serviceInfo.uri != uri;
}
if (contentType in this._contentTypes) {
this._contentTypes[contentType] =
this._contentTypes[contentType].filter(notURI);
}
},
/**
*
*/
_mappings: {
"application/rss+xml": TYPE_MAYBE_FEED,
"application/atom+xml": TYPE_MAYBE_FEED,
},
/**
* These are types for which there is a separate content converter aside
* from our built in generic one. We should not automatically register
* a factory for creating a converter for these types.
*/
_blockedTypes: {
"application/vnd.mozilla.maybe.feed": true,
},
/**
* Determines the "internal" content type based on the _mappings.
* @param contentType
* @returns The resolved contentType value.
*/
_resolveContentType:
function WCCR__resolveContentType(contentType) {
if (contentType in this._mappings)
return this._mappings[contentType];
return contentType;
},
_makeURI: function(aURL, aOriginCharset, aBaseURI) {
var ioService = Components.classes["@mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
return ioService.newURI(aURL, aOriginCharset, aBaseURI);
},
_checkAndGetURI:
function WCCR_checkAndGetURI(aURIString, aContentWindow)
{
try {
var uri = this._makeURI(aURIString);
} catch (ex) {
// not supposed to throw according to spec
return;
}
// For security reasons we reject non-http(s) urls (see bug 354316),
// we may need to revise this once we support more content types
// XXX this should be a "security exception" according to spec, but that
// isn't defined yet.
if (uri.scheme != "http" && uri.scheme != "https")
throw("Permission denied to add " + uri.spec + " as a content or protocol handler");
// We also reject handlers registered from a different host (see bug 402287)
// The pref allows us to test the feature
var pb = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
if ((!pb.prefHasUserValue(PREF_ALLOW_DIFFERENT_HOST) ||
!pb.getBoolPref(PREF_ALLOW_DIFFERENT_HOST)) &&
aContentWindow.location.hostname != uri.host)
throw("Permission denied to add " + uri.spec + " as a content or protocol handler");
// If the uri doesn't contain '%s', it won't be a good handler
if (uri.spec.indexOf("%s") < 0)
throw NS_ERROR_DOM_SYNTAX_ERR;
return uri;
},
/**
* Determines if a web handler is already registered.
*
* @param aProtocol
* The scheme of the web handler we are checking for.
* @param aURITemplate
* The URI template that the handler uses to handle the protocol.
* @return true if it is already registered, false otherwise.
*/
_protocolHandlerRegistered:
function WCCR_protocolHandlerRegistered(aProtocol, aURITemplate) {
var eps = Cc["@mozilla.org/uriloader/external-protocol-service;1"].
getService(Ci.nsIExternalProtocolService);
var handlerInfo = eps.getProtocolHandlerInfo(aProtocol);
var handlers = handlerInfo.possibleApplicationHandlers;
for (let i = 0; i < handlers.length; i++) {
try { // We only want to test web handlers
let handler = handlers.queryElementAt(i, Ci.nsIWebHandlerApp);
if (handler.uriTemplate == aURITemplate)
return true;
} catch (e) { /* it wasn't a web handler */ }
}
return false;
},
/**
* See nsIWebContentHandlerRegistrar
*/
registerProtocolHandler:
function WCCR_registerProtocolHandler(aProtocol, aURIString, aTitle, aContentWindow) {
LOG("registerProtocolHandler(" + aProtocol + "," + aURIString + "," + aTitle + ")");
if (Cc["@mozilla.org/privatebrowsing;1"].
getService(Ci.nsIPrivateBrowsingService).
privateBrowsingEnabled) {
// Inside the private browsing mode, we don't want to alert the user to save
// a protocol handler. We log it to the error console so that web developers
// would have some way to tell what's going wrong.
Cc["@mozilla.org/consoleservice;1"].
getService(Ci.nsIConsoleService).
logStringMessage("Web page denied access to register a protocol handler inside private browsing mode");
return;
}
// First, check to make sure this isn't already handled internally (we don't
// want to let them take over, say "chrome").
var ios = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
var handler = ios.getProtocolHandler(aProtocol);
if (!(handler instanceof Ci.nsIExternalProtocolHandler)) {
// This is handled internally, so we don't want them to register
// XXX this should be a "security exception" according to spec, but that
// isn't defined yet.
throw("Permission denied to add " + aURIString + "as a protocol handler");
}
// check if it is in the black list
var pb = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
var allowed;
try {
allowed = pb.getBoolPref(PREF_HANDLER_EXTERNAL_PREFIX + "." + aProtocol);
}
catch (e) {
allowed = pb.getBoolPref(PREF_HANDLER_EXTERNAL_PREFIX + "-default");
}
if (!allowed) {
// XXX this should be a "security exception" according to spec
throw("Not allowed to register a protocol handler for " + aProtocol);
}
var uri = this._checkAndGetURI(aURIString, aContentWindow);
var buttons, message;
if (this._protocolHandlerRegistered(aProtocol, uri.spec))
message = this._getFormattedString("protocolHandlerRegistered",
[aTitle, aProtocol]);
else {
// Now Ask the user and provide the proper callback
message = this._getFormattedString("addProtocolHandler",
[aTitle, uri.host, aProtocol]);
var fis = Cc["@mozilla.org/browser/favicon-service;1"].
getService(Ci.nsIFaviconService);
var notificationIcon = fis.getFaviconLinkForIcon(uri);
var notificationValue = "Protocol Registration: " + aProtocol;
var addButton = {
label: this._getString("addProtocolHandlerAddButton"),
accessKey: this._getString("addHandlerAddButtonAccesskey"),
protocolInfo: { protocol: aProtocol, uri: uri.spec, name: aTitle },
callback:
function WCCR_addProtocolHandlerButtonCallback(aNotification, aButtonInfo) {
var protocol = aButtonInfo.protocolInfo.protocol;
var uri = aButtonInfo.protocolInfo.uri;
var name = aButtonInfo.protocolInfo.name;
var handler = Cc["@mozilla.org/uriloader/web-handler-app;1"].
createInstance(Ci.nsIWebHandlerApp);
handler.name = name;
handler.uriTemplate = uri;
var eps = Cc["@mozilla.org/uriloader/external-protocol-service;1"].
getService(Ci.nsIExternalProtocolService);
var handlerInfo = eps.getProtocolHandlerInfo(protocol);
handlerInfo.possibleApplicationHandlers.appendElement(handler, false);
// Since the user has agreed to add a new handler, chances are good
// that the next time they see a handler of this type, they're going
// to want to use it. Reset the handlerInfo to ask before the next
// use.
handlerInfo.alwaysAskBeforeHandling = true;
var hs = Cc["@mozilla.org/uriloader/handler-service;1"].
getService(Ci.nsIHandlerService);
hs.store(handlerInfo);
}
};
buttons = [addButton];
}
var browserWindow = this._getBrowserWindowForContentWindow(aContentWindow);
var browserElement = this._getBrowserForContentWindow(browserWindow, aContentWindow);
var notificationBox = browserWindow.getBrowser().getNotificationBox(browserElement);
notificationBox.appendNotification(message,
notificationValue,
notificationIcon,
notificationBox.PRIORITY_INFO_LOW,
buttons);
},
/**
* See nsIWebContentHandlerRegistrar
* If a DOM window is provided, then the request came from content, so we
* prompt the user to confirm the registration.
*/
registerContentHandler:
function WCCR_registerContentHandler(aContentType, aURIString, aTitle, aContentWindow) {
LOG("registerContentHandler(" + aContentType + "," + aURIString + "," + aTitle + ")");
// We only support feed types at present.
// XXX this should be a "security exception" according to spec, but that
// isn't defined yet.
var contentType = this._resolveContentType(aContentType);
if (contentType != TYPE_MAYBE_FEED)
return;
if (aContentWindow) {
var uri = this._checkAndGetURI(aURIString, aContentWindow);
var browserWindow = this._getBrowserWindowForContentWindow(aContentWindow);
var browserElement = this._getBrowserForContentWindow(browserWindow, aContentWindow);
var notificationBox = browserWindow.getBrowser().getNotificationBox(browserElement);
this._appendFeedReaderNotification(uri, aTitle, notificationBox);
}
else
this._registerContentHandler(contentType, aURIString, aTitle);
},
/**
* Returns the browser chrome window in which the content window is in
*/
_getBrowserWindowForContentWindow:
function WCCR__getBrowserWindowForContentWindow(aContentWindow) {
return aContentWindow.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShellTreeItem)
.rootTreeItem
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindow)
.wrappedJSObject;
},
/**
* Returns the <xul:browser> element associated with the given content
* window.
*
* @param aBrowserWindow
* The browser window in which the content window is in.
* @param aContentWindow
* The content window. It's possible to pass a child content window
* (i.e. the content window of a frame/iframe).
*/
_getBrowserForContentWindow:
function WCCR__getBrowserForContentWindow(aBrowserWindow, aContentWindow) {
// This depends on pseudo APIs of browser.js and tabbrowser.xml
aContentWindow = aContentWindow.top;
var browsers = aBrowserWindow.getBrowser().browsers;
for (var i = 0; i < browsers.length; ++i) {
if (browsers[i].contentWindow == aContentWindow)
return browsers[i];
}
},
/**
* Appends a notifcation for the given feed reader details.
*
* The notification could be either a pseudo-dialog which lets
* the user to add the feed reader:
* [ [icon] Add %feed-reader-name% (%feed-reader-host%) as a Feed Reader? (Add) [x] ]
*
* or a simple message for the case where the feed reader is already registered:
* [ [icon] %feed-reader-name% is already registered as a Feed Reader [x] ]
*
* A new notification isn't appended if the given notificationbox has a
* notification for the same feed reader.
*
* @param aURI
* The url of the feed reader as a nsIURI object
* @param aName
* The feed reader name as it was passed to registerContentHandler
* @param aNotificationBox
* The notification box to which a notification might be appended
* @return true if a notification has been appended, false otherwise.
*/
_appendFeedReaderNotification:
function WCCR__appendFeedReaderNotification(aURI, aName, aNotificationBox) {
var uriSpec = aURI.spec;
var notificationValue = "feed reader notification: " + uriSpec;
var notificationIcon = aURI.prePath + "/favicon.ico";
// Don't append a new notification if the notificationbox
// has a notification for the given feed reader already
if (aNotificationBox.getNotificationWithValue(notificationValue))
return false;
var buttons, message;
if (this.getWebContentHandlerByURI(TYPE_MAYBE_FEED, uriSpec))
message = this._getFormattedString("handlerRegistered", [aName]);
else {
message = this._getFormattedString("addHandler", [aName, aURI.host]);
var self = this;
var addButton = {
_outer: self,
label: self._getString("addHandlerAddButton"),
accessKey: self._getString("addHandlerAddButtonAccesskey"),
feedReaderInfo: { uri: uriSpec, name: aName },
/* static */
callback:
function WCCR__addFeedReaderButtonCallback(aNotification, aButtonInfo) {
var uri = aButtonInfo.feedReaderInfo.uri;
var name = aButtonInfo.feedReaderInfo.name;
var outer = aButtonInfo._outer;
// The reader could have been added from another window mean while
if (!outer.getWebContentHandlerByURI(TYPE_MAYBE_FEED, uri))
outer._registerContentHandler(TYPE_MAYBE_FEED, uri, name);
// avoid reference cycles
aButtonInfo._outer = null;
return false;
}
};
buttons = [addButton];
}
aNotificationBox.appendNotification(message,
notificationValue,
notificationIcon,
aNotificationBox.PRIORITY_INFO_LOW,
buttons);
return true;
},
/**
* Save Web Content Handler metadata to persistent preferences.
* @param contentType
* The content Type being handled
* @param uri
* The uri of the web service
* @param title
* The human readable name of the web service
*
* This data is stored under:
*
* browser.contentHandlers.type0 = content/type
* browser.contentHandlers.uri0 = http://www.foo.com/q=%s
* browser.contentHandlers.title0 = Foo 2.0alphr
*/
_saveContentHandlerToPrefs:
function WCCR__saveContentHandlerToPrefs(contentType, uri, title) {
var ps =
Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
var i = 0;
var typeBranch = null;
while (true) {
typeBranch =
ps.getBranch(PREF_CONTENTHANDLERS_BRANCH + i + ".");
try {
typeBranch.getCharPref("type");
++i;
}
catch (e) {
// No more handlers
break;
}
}
if (typeBranch) {
typeBranch.setCharPref("type", contentType);
var pls =
Cc["@mozilla.org/pref-localizedstring;1"].
createInstance(Ci.nsIPrefLocalizedString);
pls.data = uri;
typeBranch.setComplexValue("uri", Ci.nsIPrefLocalizedString, pls);
pls.data = title;
typeBranch.setComplexValue("title", Ci.nsIPrefLocalizedString, pls);
ps.savePrefFile(null);
}
},
/**
* Determines if there is a type with a particular uri registered for the
* specified content type already.
* @param contentType
* The content type that the uri handles
* @param uri
* The uri of the
*/
_typeIsRegistered: function WCCR__typeIsRegistered(contentType, uri) {
if (!(contentType in this._contentTypes))
return false;
var services = this._contentTypes[contentType];
for (var i = 0; i < services.length; ++i) {
// This uri has already been registered
if (services[i].uri == uri)
return true;
}
return false;
},
/**
* Gets a stream converter contract id for the specified content type.
* @param contentType
* The source content type for the conversion.
* @returns A contract id to construct a converter to convert between the
* contentType and *\/*.
*/
_getConverterContractID: function WCCR__getConverterContractID(contentType) {
const template = "@mozilla.org/streamconv;1?from=%s&to=*/*";
return template.replace(/%s/, contentType);
},
/**
* Register a web service handler for a content type.
*
* @param contentType
* the content type being handled
* @param uri
* the URI of the web service
* @param title
* the human readable name of the web service
*/
_registerContentHandler:
function WCCR__registerContentHandler(contentType, uri, title) {
this._updateContentTypeHandlerMap(contentType, uri, title);
this._saveContentHandlerToPrefs(contentType, uri, title);
if (contentType == TYPE_MAYBE_FEED) {
// Make the new handler the last-selected reader in the preview page
// and make sure the preview page is shown the next time a feed is visited
var pb = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService).getBranch(null);
pb.setCharPref(PREF_SELECTED_READER, "web");
var supportsString =
Cc["@mozilla.org/supports-string;1"].
createInstance(Ci.nsISupportsString);
supportsString.data = uri;
pb.setComplexValue(PREF_SELECTED_WEB, Ci.nsISupportsString,
supportsString);
pb.setCharPref(PREF_SELECTED_ACTION, "ask");
this._setAutoHandler(TYPE_MAYBE_FEED, null);
}
},
/**
* Update the content type -> handler map. This mapping is not persisted, use
* registerContentHandler or _saveContentHandlerToPrefs for that purpose.
* @param contentType
* The content Type being handled
* @param uri
* The uri of the web service
* @param title
* The human readable name of the web service
*/
_updateContentTypeHandlerMap:
function WCCR__updateContentTypeHandlerMap(contentType, uri, title) {
if (!(contentType in this._contentTypes))
this._contentTypes[contentType] = [];
// Avoid adding duplicates
if (this._typeIsRegistered(contentType, uri))
return;
this._contentTypes[contentType].push(new ServiceInfo(contentType, uri, title));
if (!(contentType in this._blockedTypes)) {
var converterContractID = this._getConverterContractID(contentType);
var cr = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
cr.registerFactory(WCC_CLASSID, WCC_CLASSNAME, converterContractID,
WebContentConverterFactory);
}
},
/**
* See nsIWebContentConverterService
*/
getContentHandlers:
function WCCR_getContentHandlers(contentType, countRef) {
countRef.value = 0;
if (!(contentType in this._contentTypes))
return [];
var handlers = this._contentTypes[contentType];
countRef.value = handlers.length;
return handlers;
},
/**
* See nsIWebContentConverterService
*/
resetHandlersForType:
function WCCR_resetHandlersForType(contentType) {
// currently unused within the tree, so only useful for extensions; previous
// impl. was buggy (and even infinite-looped!), so I argue that this is a
// definite improvement
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
},
/**
* Registers a handler from the settings on a preferences branch.
*
* @param branch
* an nsIPrefBranch containing "type", "uri", and "title" preferences
* corresponding to the content handler to be registered
*/
_registerContentHandlerWithBranch: function(branch) {
/**
* Since we support up to six predefined readers, we need to handle gaps
* better, since the first branch with user-added values will be .6
*
* How we deal with that is to check to see if there's no prefs in the
* branch and stop cycling once that's true. This doesn't fix the case
* where a user manually removes a reader, but that's not supported yet!
*/
var vals = branch.getChildList("");
if (vals.length == 0)
return;
try {
var type = branch.getCharPref("type");
var uri = branch.getComplexValue("uri", Ci.nsIPrefLocalizedString).data;
var title = branch.getComplexValue("title",
Ci.nsIPrefLocalizedString).data;
this._updateContentTypeHandlerMap(type, uri, title);
}
catch(ex) {
// do nothing, the next branch might have values
}
},
/**
* Load the auto handler, content handler and protocol tables from
* preferences.
*/
_init: function WCCR__init() {
var ps =
Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
var kids = ps.getBranch(PREF_CONTENTHANDLERS_BRANCH)
.getChildList("");
// first get the numbers of the providers by getting all ###.uri prefs
var nums = [];
for (var i = 0; i < kids.length; i++) {
var match = /^(\d+)\.uri$/.exec(kids[i]);
if (!match)
continue;
else
nums.push(match[1]);
}
// sort them, to get them back in order
nums.sort(function(a, b) {return a - b;});
// now register them
for (var i = 0; i < nums.length; i++) {
var branch = ps.getBranch(PREF_CONTENTHANDLERS_BRANCH + nums[i] + ".");
this._registerContentHandlerWithBranch(branch);
}
// We need to do this _after_ registering all of the available handlers,
// so that getWebContentHandlerByURI can return successfully.
try {
var autoBranch = ps.getBranch(PREF_CONTENTHANDLERS_AUTO);
var childPrefs = autoBranch.getChildList("");
for (var i = 0; i < childPrefs.length; ++i) {
var type = childPrefs[i];
var uri = autoBranch.getCharPref(type);
if (uri) {
var handler = this.getWebContentHandlerByURI(type, uri);
this._setAutoHandler(type, handler);
}
}
}
catch (e) {
// No auto branch yet, that's fine
//LOG("WCCR.init: There is no auto branch, benign");
}
},
/**
* See nsIObserver
*/
observe: function WCCR_observe(subject, topic, data) {
var os =
Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
switch (topic) {
case "app-startup":
os.addObserver(this, "browser-ui-startup-complete", false);
break;
case "browser-ui-startup-complete":
os.removeObserver(this, "browser-ui-startup-complete");
this._init();
break;
}
},
/**
* See nsIFactory
*/
createInstance: function WCCR_createInstance(outer, iid) {
if (outer != null)
throw Cr.NS_ERROR_NO_AGGREGATION;
return this.QueryInterface(iid);
},
/**
* See nsIClassInfo
*/
getInterfaces: function WCCR_getInterfaces(countRef) {
var interfaces =
[Ci.nsIWebContentConverterService, Ci.nsIWebContentHandlerRegistrar,
Ci.nsIObserver, Ci.nsIClassInfo, Ci.nsIFactory, Ci.nsISupports];
countRef.value = interfaces.length;
return interfaces;
},
getHelperForLanguage: function WCCR_getHelperForLanguage(language) {
return null;
},
classID: WCCR_CLASSID,
implementationLanguage: Ci.nsIProgrammingLanguage.JAVASCRIPT,
flags: Ci.nsIClassInfo.DOM_OBJECT,
/**
* See nsISupports
*/
QueryInterface: XPCOMUtils.generateQI(
[Ci.nsIWebContentConverterService,
Ci.nsIWebContentHandlerRegistrar,
Ci.nsIObserver,
Ci.nsIClassInfo,
Ci.nsIFactory,
Ci.nsISupports]),
_xpcom_categories: [{
category: "app-startup",
service: true
}]
};
var NSGetFactory = XPCOMUtils.generateNSGetFactory([WebContentConverterRegistrar]);