summaryrefslogtreecommitdiffstats
path: root/modules/PopupNotifications.jsm
blob: 0cb970230135f85df76a973909cad7c5b4913ae2 (plain)
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
/* 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/. */

this.EXPORTED_SYMBOLS = ["PopupNotifications"];

var Cc = Components.classes, Ci = Components.interfaces, Cu = Components.utils;

Cu.import("resource://gre/modules/Services.jsm");

const NOTIFICATION_EVENT_DISMISSED = "dismissed";
const NOTIFICATION_EVENT_REMOVED = "removed";
const NOTIFICATION_EVENT_SHOWING = "showing";
const NOTIFICATION_EVENT_SHOWN = "shown";
const NOTIFICATION_EVENT_SWAPPING = "swapping";

const ICON_SELECTOR = ".notification-anchor-icon";
const ICON_ATTRIBUTE_SHOWING = "showing";

const PREF_SECURITY_DELAY = "security.notification_enable_delay";

var popupNotificationsMap = new WeakMap();
var gNotificationParents = new WeakMap;

function getAnchorFromBrowser(aBrowser) {
  let anchor = aBrowser.getAttribute("popupnotificationanchor") ||
                aBrowser.popupnotificationanchor;
  if (anchor) {
    if (anchor instanceof Ci.nsIDOMXULElement) {
      return anchor;
    }
    return aBrowser.ownerDocument.getElementById(anchor);
  }
  return null;
}

function getNotificationFromElement(aElement) {
  // Need to find the associated notification object, which is a bit tricky
  // since it isn't associated with the element directly - this is kind of
  // gross and very dependent on the structure of the popupnotification
  // binding's content.
  let notificationEl;
  let parent = aElement;
  while (parent && (parent = aElement.ownerDocument.getBindingParent(parent)))
    notificationEl = parent;
  return notificationEl;
}

/**
 * Notification object describes a single popup notification.
 *
 * @see PopupNotifications.show()
 */
function Notification(id, message, anchorID, mainAction, secondaryActions,
                      browser, owner, options) {
  this.id = id;
  this.message = message;
  this.anchorID = anchorID;
  this.mainAction = mainAction;
  this.secondaryActions = secondaryActions || [];
  this.browser = browser;
  this.owner = owner;
  this.options = options || {};
}

Notification.prototype = {

  id: null,
  message: null,
  anchorID: null,
  mainAction: null,
  secondaryActions: null,
  browser: null,
  owner: null,
  options: null,
  timeShown: null,

  /**
   * Removes the notification and updates the popup accordingly if needed.
   */
  remove: function Notification_remove() {
    this.owner.remove(this);
  },

  get anchorElement() {
    let iconBox = this.owner.iconBox;

    let anchorElement = getAnchorFromBrowser(this.browser);

    if (!iconBox)
      return anchorElement;

    if (!anchorElement && this.anchorID)
      anchorElement = iconBox.querySelector("#"+this.anchorID);

    // Use a default anchor icon if it's available
    if (!anchorElement)
      anchorElement = iconBox.querySelector("#default-notification-icon") ||
                      iconBox;

    return anchorElement;
  },

  reshow: function() {
    this.owner._reshowNotifications(this.anchorElement, this.browser);
  }
};

/**
 * The PopupNotifications object manages popup notifications for a given browser
 * window.
 * @param tabbrowser
 *        window's <xul:tabbrowser/>. Used to observe tab switching events and
 *        for determining the active browser element.
 * @param panel
 *        The <xul:panel/> element to use for notifications. The panel is
 *        populated with <popupnotification> children and displayed it as
 *        needed.
 * @param iconBox
 *        Reference to a container element that should be hidden or
 *        unhidden when notifications are hidden or shown. It should be the
 *        parent of anchor elements whose IDs are passed to show().
 *        It is used as a fallback popup anchor if notifications specify
 *        invalid or non-existent anchor IDs.
 */
this.PopupNotifications = function PopupNotifications(tabbrowser, panel, iconBox) {
  if (!(tabbrowser instanceof Ci.nsIDOMXULElement))
    throw "Invalid tabbrowser";
  if (iconBox && !(iconBox instanceof Ci.nsIDOMXULElement))
    throw "Invalid iconBox";
  if (!(panel instanceof Ci.nsIDOMXULElement))
    throw "Invalid panel";

  this.window = tabbrowser.ownerDocument.defaultView;
  this.panel = panel;
  this.tabbrowser = tabbrowser;
  this.iconBox = iconBox;
  this.buttonDelay = Services.prefs.getIntPref(PREF_SECURITY_DELAY);

  this.panel.addEventListener("popuphidden", this, true);

  this.window.addEventListener("activate", this, true);
  if (this.tabbrowser.tabContainer)
    this.tabbrowser.tabContainer.addEventListener("TabSelect", this, true);
}

PopupNotifications.prototype = {

  window: null,
  panel: null,
  tabbrowser: null,

  _iconBox: null,
  set iconBox(iconBox) {
    // Remove the listeners on the old iconBox, if needed
    if (this._iconBox) {
      this._iconBox.removeEventListener("click", this, false);
      this._iconBox.removeEventListener("keypress", this, false);
    }
    this._iconBox = iconBox;
    if (iconBox) {
      iconBox.addEventListener("click", this, false);
      iconBox.addEventListener("keypress", this, false);
    }
  },
  get iconBox() {
    return this._iconBox;
  },

  /**
   * Retrieve a Notification object associated with the browser/ID pair.
   * @param id
   *        The Notification ID to search for.
   * @param browser
   *        The browser whose notifications should be searched. If null, the
   *        currently selected browser's notifications will be searched.
   *
   * @returns the corresponding Notification object, or null if no such
   *          notification exists.
   */
  getNotification: function PopupNotifications_getNotification(id, browser) {
    let n = null;
    let notifications = this._getNotificationsForBrowser(browser || this.tabbrowser.selectedBrowser);
    notifications.some(function(x) x.id == id && (n = x));
    return n;
  },

  /**
   * Adds a new popup notification.
   * @param browser
   *        The <xul:browser> element associated with the notification. Must not
   *        be null.
   * @param id
   *        A unique ID that identifies the type of notification (e.g.
   *        "geolocation"). Only one notification with a given ID can be visible
   *        at a time. If a notification already exists with the given ID, it
   *        will be replaced.
   * @param message
   *        The text to be displayed in the notification.
   * @param anchorID
   *        The ID of the element that should be used as this notification
   *        popup's anchor. May be null, in which case the notification will be
   *        anchored to the iconBox.
   * @param mainAction
   *        A JavaScript object literal describing the notification button's
   *        action. If present, it must have the following properties:
   *          - label (string): the button's label.
   *          - accessKey (string): the button's accessKey.
   *          - callback (function): a callback to be invoked when the button is
   *            pressed, is passed an object that contains the following fields:
   *              - checkboxChecked: (boolean) If the optional checkbox is checked.
   *        If null, the notification will not have a button, and
   *        secondaryActions will be ignored.
   * @param secondaryActions
   *        An optional JavaScript array describing the notification's alternate
   *        actions. The array should contain objects with the same properties
   *        as mainAction. These are used to populate the notification button's
   *        dropdown menu.
   * @param options
   *        An options JavaScript object holding additional properties for the
   *        notification. The following properties are currently supported:
   *        persistence: An integer. The notification will not automatically
   *                     dismiss for this many page loads.
   *        timeout:     A time in milliseconds. The notification will not
   *                     automatically dismiss before this time.
   *        persistWhileVisible:
   *                     A boolean. If true, a visible notification will always
   *                     persist across location changes.
   *        dismissed:   Whether the notification should be added as a dismissed
   *                     notification. Dismissed notifications can be activated
   *                     by clicking on their anchorElement.
   *        eventCallback:
   *                     Callback to be invoked when the notification changes
   *                     state. The callback's first argument is a string
   *                     identifying the state change:
   *                     "dismissed": notification has been dismissed by the
   *                                  user (e.g. by clicking away or switching
   *                                  tabs)
   *                     "removed": notification has been removed (due to
   *                                location change or user action)
   *                     "showing": notification is about to be shown
   *                                (this can be fired multiple times as
   *                                 notifications are dismissed and re-shown)
   *                     "shown": notification has been shown (this can be fired
   *                              multiple times as notifications are dismissed
   *                              and re-shown)
   *                     "swapping": the docshell of the browser that created
   *                                 the notification is about to be swapped to
   *                                 another browser. A second parameter contains
   *                                 the browser that is receiving the docshell,
   *                                 so that the event callback can transfer stuff
   *                                 specific to this notification.
   *                                 If the callback returns true, the notification
   *                                 will be moved to the new browser.
   *                                 If the callback isn't implemented, returns false,
   *                                 or doesn't return any value, the notification
   *                                 will be removed.
   *        neverShow:   Indicate that no popup should be shown for this
   *                     notification. Useful for just showing the anchor icon.
   *        removeOnDismissal:
   *                     Notifications with this parameter set to true will be
   *                     removed when they would have otherwise been dismissed
   *                     (i.e. any time the popup is closed due to user
   *                     interaction).
   *        checkbox:    An object that allows you to add a checkbox and
   *                     control its behavior with these fields:
   *                       label:
   *                         (required) Label to be shown next to the checkbox.
   *                       checked:
   *                         (optional) Whether the checkbox should be checked
   *                         by default. Defaults to false.
   *                       checkedState:
   *                         (optional) An object that allows you to customize
   *                         the notification state when the checkbox is checked.
   *                           disableMainAction:
   *                             (optional) Whether the mainAction is disabled.
   *                             Defaults to false.
   *                           warningLabel:
   *                             (optional) A (warning) text that is shown below the
   *                             checkbox. Pass null to hide.
   *                       uncheckedState:
   *                         (optional) An object that allows you to customize
   *                         the notification state when the checkbox is not checked.
   *                         Has the same attributes as checkedState.
   *        popupIconURL:
   *                     A string. URL of the image to be displayed in the popup.
   *                     Normally specified in CSS using list-style-image and the
   *                     .popup-notification-icon[popupid=...] selector.
   *        learnMoreURL:
   *                     A string URL. Setting this property will make the
   *                     prompt display a "Learn More" link that, when clicked,
   *                     opens the URL in a new tab.
   * @returns the Notification object corresponding to the added notification.
   */
  show: function PopupNotifications_show(browser, id, message, anchorID,
                                         mainAction, secondaryActions, options) {
    function isInvalidAction(a) {
      return !a || !(typeof(a.callback) == "function") || !a.label || !a.accessKey;
    }

    if (!browser)
      throw "PopupNotifications_show: invalid browser";
    if (!id)
      throw "PopupNotifications_show: invalid ID";
    if (mainAction && isInvalidAction(mainAction))
      throw "PopupNotifications_show: invalid mainAction";
    if (secondaryActions && secondaryActions.some(isInvalidAction))
      throw "PopupNotifications_show: invalid secondaryActions";

    let notification = new Notification(id, message, anchorID, mainAction,
                                        secondaryActions, browser, this, options);

    if (options && options.dismissed)
      notification.dismissed = true;

    let existingNotification = this.getNotification(id, browser);
    if (existingNotification)
      this._remove(existingNotification);

    let notifications = this._getNotificationsForBrowser(browser);
    notifications.push(notification);

    let fm = Cc["@mozilla.org/focus-manager;1"].getService(Ci.nsIFocusManager);
    if (browser.docShell.isActive && fm.activeWindow == this.window) {
      // show panel now
      this._update(notifications, notification.anchorElement, true);
    } else {
      // Otherwise, update() will display the notification the next time the
      // relevant tab/window is selected.

      // If the tab is selected but the window is in the background, let the OS
      // tell the user that there's a notification waiting in that window.
      // At some point we might want to do something about background tabs here
      // too. When the user switches to this window, we'll show the panel if
      // this browser is a tab (thus showing the anchor icon). For
      // non-tabbrowser browsers, we need to make the icon visible now or the
      // user will not be able to open the panel.
      if (!notification.dismissed && browser.docShell.isActive) {
        this.window.getAttention();
        if (notification.anchorElement.parentNode != this.iconBox) {
          notification.anchorElement.setAttribute(ICON_ATTRIBUTE_SHOWING, "true");
        }
      }

      // Notify observers that we're not showing the popup (useful for testing)
      this._notify("backgroundShow");
    }

    return notification;
  },

  /**
   * Returns true if the notification popup is currently being displayed.
   */
  get isPanelOpen() {
    let panelState = this.panel.state;

    return panelState == "showing" || panelState == "open";
  },

  /**
   * Called by the consumer to indicate that a browser's location has changed,
   * so that we can update the active notifications accordingly.
   */
  locationChange: function PopupNotifications_locationChange(aBrowser) {
    if (!aBrowser)
      throw "PopupNotifications_locationChange: invalid browser";

    let notifications = this._getNotificationsForBrowser(aBrowser);

    notifications = notifications.filter(function (notification) {
      // The persistWhileVisible option allows an open notification to persist
      // across location changes
      if (notification.options.persistWhileVisible &&
          this.isPanelOpen) {
        if ("persistence" in notification.options &&
          notification.options.persistence)
          notification.options.persistence--;
        return true;
      }

      // The persistence option allows a notification to persist across multiple
      // page loads
      if ("persistence" in notification.options &&
          notification.options.persistence) {
        notification.options.persistence--;
        return true;
      }

      // The timeout option allows a notification to persist until a certain time
      if ("timeout" in notification.options &&
          Date.now() <= notification.options.timeout) {
        return true;
      }

      this._fireCallback(notification, NOTIFICATION_EVENT_REMOVED);
      return false;
    }, this);

    this._setNotificationsForBrowser(aBrowser, notifications);

    if (aBrowser.docShell.isActive) {
      // get the anchor element if the browser has defined one so it will
      // _update will handle both the tabs iconBox and non-tab permission
      // anchors.
      let anchorElement = notifications.length > 0 ? notifications[0].anchorElement : null;
      if (!anchorElement)
        anchorElement = getAnchorFromBrowser(aBrowser);
      this._update(notifications, anchorElement);
    }
  },

  /**
   * Removes a Notification.
   * @param notification
   *        The Notification object to remove.
   */
  remove: function PopupNotifications_remove(notification) {
    this._remove(notification);
    
    if (notification.browser.docShell.isActive) {
      let notifications = this._getNotificationsForBrowser(notification.browser);
      this._update(notifications, notification.anchorElement);
    }
  },

  handleEvent: function (aEvent) {
    switch (aEvent.type) {
      case "popuphidden":
        this._onPopupHidden(aEvent);
        break;
      case "activate":
      case "TabSelect":
        let self = this;
        // setTimeout(..., 0) needed, otherwise openPopup from "activate" event
        // handler results in the popup being hidden again for some reason...
        this.window.setTimeout(function () {
          self._update();
        }, 0);
        break;
      case "click":
      case "keypress":
        this._onIconBoxCommand(aEvent);
        break;
    }
  },

////////////////////////////////////////////////////////////////////////////////
// Utility methods
////////////////////////////////////////////////////////////////////////////////

  _ignoreDismissal: null,
  _currentAnchorElement: null,

  /**
   * Gets notifications for the currently selected browser.
   */
  get _currentNotifications() {
    return this.tabbrowser.selectedBrowser ? this._getNotificationsForBrowser(this.tabbrowser.selectedBrowser) : [];
  },

  _remove: function PopupNotifications_removeHelper(notification) {
    // This notification may already be removed, in which case let's just fail
    // silently.
    let notifications = this._getNotificationsForBrowser(notification.browser);
    if (!notifications)
      return;

    var index = notifications.indexOf(notification);
    if (index == -1)
      return;

    if (notification.browser.docShell.isActive)
      notification.anchorElement.removeAttribute(ICON_ATTRIBUTE_SHOWING);

    // remove the notification
    notifications.splice(index, 1);
    this._fireCallback(notification, NOTIFICATION_EVENT_REMOVED);
  },

  /**
   * Dismisses the notification without removing it.
   */
  _dismiss: function PopupNotifications_dismiss() {
    let browser = this.panel.firstChild &&
                  this.panel.firstChild.notification.browser;
    if (typeof this.panel.hidePopup === "function") {
      this.panel.hidePopup();
    }
    if (browser)
      browser.focus();
  },

  /**
   * Hides the notification popup.
   */
  _hidePanel: function PopupNotifications_hide() {
    this._ignoreDismissal = true;
    if (typeof this.panel.hidePopup === "function") {
      this.panel.hidePopup();
    }
    this._ignoreDismissal = false;
  },

  /**
   * Removes all notifications from the notification popup.
   */
  _clearPanel: function () {
    let popupnotification;
    while ((popupnotification = this.panel.lastChild)) {
      this.panel.removeChild(popupnotification);

      // If this notification was provided by the chrome document rather than
      // created ad hoc, move it back to where we got it from.
      let originalParent = gNotificationParents.get(popupnotification);
      if (originalParent) {
        popupnotification.notification = null;

        // Remove nodes dynamically added to the notification's menu button
        // in _refreshPanel. Keep popupnotificationcontent nodes; they are
        // provided by the chrome document.
        let contentNode = popupnotification.lastChild;
        while (contentNode) {
          let previousSibling = contentNode.previousSibling;
          if (contentNode.nodeName != "popupnotificationcontent")
            popupnotification.removeChild(contentNode);
          contentNode = previousSibling;
        }

        // Re-hide the notification such that it isn't rendered in the chrome
        // document. _refreshPanel will unhide it again when needed.
        popupnotification.hidden = true;

        originalParent.appendChild(popupnotification);
      }
    }
  },

  _refreshPanel: function PopupNotifications_refreshPanel(notificationsToShow) {
    this._clearPanel();

    const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";

    notificationsToShow.forEach(function (n) {
      let doc = this.window.document;

      // Append "-notification" to the ID to try to avoid ID conflicts with other stuff
      // in the document.
      let popupnotificationID = n.id + "-notification";

      // If the chrome document provides a popupnotification with this id, use
      // that. Otherwise create it ad-hoc.
      let popupnotification = doc.getElementById(popupnotificationID);
      if (popupnotification)
        gNotificationParents.set(popupnotification, popupnotification.parentNode);
      else
        popupnotification = doc.createElementNS(XUL_NS, "popupnotification");

      popupnotification.setAttribute("label", n.message);
      popupnotification.setAttribute("id", popupnotificationID);
      popupnotification.setAttribute("popupid", n.id);
      popupnotification.setAttribute("closebuttoncommand", "PopupNotifications._dismiss();");
      if (n.mainAction) {
        popupnotification.setAttribute("buttonlabel", n.mainAction.label);
        popupnotification.setAttribute("buttonaccesskey", n.mainAction.accessKey);
        popupnotification.setAttribute("buttoncommand", "PopupNotifications._onButtonCommand(event);");
        popupnotification.setAttribute("menucommand", "PopupNotifications._onMenuCommand(event);");
        popupnotification.setAttribute("closeitemcommand", "PopupNotifications._dismiss();event.stopPropagation();");
      } else {
        popupnotification.removeAttribute("buttonlabel");
        popupnotification.removeAttribute("buttonaccesskey");
        popupnotification.removeAttribute("buttoncommand");
        popupnotification.removeAttribute("menucommand");
        popupnotification.removeAttribute("closeitemcommand");
      }

      if (n.options.popupIconURL)
        popupnotification.setAttribute("icon", n.options.popupIconURL);
      if (n.options.learnMoreURL)
        popupnotification.setAttribute("learnmoreurl", n.options.learnMoreURL);
      else
        popupnotification.removeAttribute("learnmoreurl");

      popupnotification.notification = n;

      if (n.secondaryActions) {
        n.secondaryActions.forEach(function (a) {
          let item = doc.createElementNS(XUL_NS, "menuitem");
          item.setAttribute("label", a.label);
          item.setAttribute("accesskey", a.accessKey);
          item.notification = n;
          item.action = a;

          popupnotification.appendChild(item);
        }, this);

        if (n.secondaryActions.length) {
          let closeItemSeparator = doc.createElementNS(XUL_NS, "menuseparator");
          popupnotification.appendChild(closeItemSeparator);
        }
      }

      let checkbox = n.options.checkbox;
      if (checkbox && checkbox.label) {
        let checked = n._checkboxChecked != null ? n._checkboxChecked : !!checkbox.checked;

        popupnotification.setAttribute("checkboxhidden", "false");
        popupnotification.setAttribute("checkboxchecked", checked);
        popupnotification.setAttribute("checkboxlabel", checkbox.label);

        popupnotification.setAttribute("checkboxcommand", "PopupNotifications._onCheckboxCommand(event);");

        if (checked) {
          this._setNotificationUIState(popupnotification, checkbox.checkedState);
        } else {
          this._setNotificationUIState(popupnotification, checkbox.uncheckedState);
        }
      } else {
        popupnotification.setAttribute("checkboxhidden", "true");
      }

      this.panel.appendChild(popupnotification);

      // The popupnotification may be hidden if we got it from the chrome
      // document rather than creating it ad hoc.
      popupnotification.hidden = false;
    }, this);
  },

  _setNotificationUIState(notification, state={}) {
    notification.setAttribute("mainactiondisabled", state.disableMainAction || "false");

    if (state.warningLabel) {
      notification.setAttribute("warninglabel", state.warningLabel);
      notification.setAttribute("warninghidden", "false");
    } else {
      notification.setAttribute("warninghidden", "true");
    }
  },

  _onCheckboxCommand(event) {
    let notificationEl = getNotificationFromElement(event.originalTarget);
    let checked = notificationEl.checkbox.checked;
    let notification = notificationEl.notification;

    // Save checkbox state to be able to persist it when re-opening the doorhanger.
    notification._checkboxChecked = checked;

    if (checked) {
      this._setNotificationUIState(notificationEl, notification.options.checkbox.checkedState);
    } else {
      this._setNotificationUIState(notificationEl, notification.options.checkbox.uncheckedState);
    }
  },

  _showPanel: function PopupNotifications_showPanel(notificationsToShow, anchorElement) {
    this.panel.hidden = false;

    notificationsToShow.forEach(function (n) {
      this._fireCallback(n, NOTIFICATION_EVENT_SHOWING);
    }, this);
    this._refreshPanel(notificationsToShow);

    if (this.isPanelOpen && this._currentAnchorElement == anchorElement)
      return;

    // If the panel is already open but we're changing anchors, we need to hide
    // it first.  Otherwise it can appear in the wrong spot.  (_hidePanel is
    // safe to call even if the panel is already hidden.)
    this._hidePanel();

    // If the anchor element is hidden or null, use the tab as the anchor. We
    // only ever show notifications for the current browser, so we can just use
    // the current tab.
    let selectedTab = this.tabbrowser.selectedTab;
    if (anchorElement) {
      let bo = anchorElement.boxObject;
      if (bo.height == 0 && bo.width == 0)
        anchorElement = selectedTab; // hidden
    } else {
      anchorElement = selectedTab; // null
    }

    this._currentAnchorElement = anchorElement;

    // On OS X and Linux we need a different panel arrow color for
    // click-to-play plugins, so copy the popupid and use css.
    this.panel.setAttribute("popupid", this.panel.firstChild.getAttribute("popupid"));
    notificationsToShow.forEach(function (n) {
      // Remember the time the notification was shown for the security delay.
      n.timeShown = this.window.performance.now();
    }, this);
    this.panel.openPopup(anchorElement, "bottomcenter topleft");
    notificationsToShow.forEach(function (n) {
      this._fireCallback(n, NOTIFICATION_EVENT_SHOWN);
    }, this);
  },

  /**
   * Updates the notification state in response to window activation or tab
   * selection changes.
   *
   * @param notifications an array of Notification instances. if null,
   *                      notifications will be retrieved off the current
   *                      browser tab
   * @param anchor is a XUL element that the notifications panel will be
   *                      anchored to
   * @param dismissShowing if true, dismiss any currently visible notifications
   *                       if there are no notifications to show. Otherwise,
   *                       currently displayed notifications will be left alone.
   */
  _update: function PopupNotifications_update(notifications, anchor, dismissShowing = false) {
    let useIconBox = this.iconBox && (!anchor || anchor.parentNode == this.iconBox);
    if (useIconBox) {
      // hide icons of the previous tab.
      this._hideIcons();
    }

    let anchorElement = anchor, notificationsToShow = [];
    if (!notifications)
      notifications = this._currentNotifications;
    let haveNotifications = notifications.length > 0;
    if (haveNotifications) {
      // Only show the notifications that have the passed-in anchor (or the
      // first notification's anchor, if none was passed in). Other
      // notifications will be shown once these are dismissed.
      anchorElement = anchor || notifications[0].anchorElement;

      if (useIconBox) {
        this._showIcons(notifications);
        this.iconBox.hidden = false;
      } else if (anchorElement) {
        anchorElement.setAttribute(ICON_ATTRIBUTE_SHOWING, "true");
        // use the anchorID as a class along with the default icon class as a
        // fallback if anchorID is not defined in CSS. We always use the first
        // notifications icon, so in the case of multiple notifications we'll
        // only use the default icon
        if (anchorElement.classList.contains("notification-anchor-icon")) {
          // remove previous icon classes
          let className = anchorElement.className.replace(/([-\w]+-notification-icon\s?)/g,"")
          className = "default-notification-icon " + className;
          if (notifications.length == 1) {
            className = notifications[0].anchorID + " " + className;
          }
          anchorElement.className = className;
        }
      }

      // Also filter out notifications that have been dismissed.
      notificationsToShow = notifications.filter(function (n) {
        return !n.dismissed && n.anchorElement == anchorElement &&
               !n.options.neverShow;
      });
    }

    if (notificationsToShow.length > 0) {
      this._showPanel(notificationsToShow, anchorElement);
    } else {
      // Notify observers that we're not showing the popup (useful for testing)
      this._notify("updateNotShowing");

      // Close the panel if there are no notifications to show.
      // When called from PopupNotifications.show() we should never close the
      // panel, however. It may just be adding a dismissed notification, in
      // which case we want to continue showing any existing notifications.
      if (!dismissShowing)
        this._dismiss();

      // Only hide the iconBox if we actually have no notifications (as opposed
      // to not having any showable notifications)
      if (!haveNotifications) {
        if (useIconBox)
          this.iconBox.hidden = true;
        else if (anchorElement)
          anchorElement.removeAttribute(ICON_ATTRIBUTE_SHOWING);
      }
    }
  },

  _showIcons: function PopupNotifications_showIcons(aCurrentNotifications) {
    for (let notification of aCurrentNotifications) {
      let anchorElm = notification.anchorElement;
      if (anchorElm) {
        anchorElm.setAttribute(ICON_ATTRIBUTE_SHOWING, "true");
      }
    }
  },

  _hideIcons: function PopupNotifications_hideIcons() {
    let icons = this.iconBox.querySelectorAll(ICON_SELECTOR);
    for (let icon of icons) {
      icon.removeAttribute(ICON_ATTRIBUTE_SHOWING);
    }
  },

  /**
   * Gets and sets notifications for the browser.
   */
  _getNotificationsForBrowser: function PopupNotifications_getNotifications(browser) {
    let notifications = popupNotificationsMap.get(browser);
    if (!notifications) {
      // Initialize the WeakMap for the browser so callers can reference/manipulate the array.
      notifications = [];
      popupNotificationsMap.set(browser, notifications);
    }
    return notifications;
  },
  _setNotificationsForBrowser: function PopupNotifications_setNotifications(browser, notifications) {
    popupNotificationsMap.set(browser, notifications);
    return notifications;
  },

  _onIconBoxCommand: function PopupNotifications_onIconBoxCommand(event) {
    // Left click, space or enter only
    let type = event.type;
    if (type == "click" && event.button != 0)
      return;

    if (type == "keypress" &&
        !(event.charCode == Ci.nsIDOMKeyEvent.DOM_VK_SPACE ||
          event.keyCode == Ci.nsIDOMKeyEvent.DOM_VK_RETURN))
      return;

    if (this._currentNotifications.length == 0)
      return;

    // Get the anchor that is the immediate child of the icon box
    let anchor = event.target;
    while (anchor && anchor.parentNode != this.iconBox)
      anchor = anchor.parentNode;

    this._reshowNotifications(anchor);
  },

  _reshowNotifications: function PopupNotifications_reshowNotifications(anchor, browser) {
    // Mark notifications anchored to this anchor as un-dismissed
    let notifications = this._getNotificationsForBrowser(browser || this.tabbrowser.selectedBrowser);
    notifications.forEach(function (n) {
      if (n.anchorElement == anchor)
        n.dismissed = false;
    });

    // ...and then show them.
    this._update(notifications, anchor);
  },

  _swapBrowserNotifications: function PopupNotifications_swapBrowserNoficications(ourBrowser, otherBrowser) {
    // When swaping browser docshells (e.g. dragging tab to new window) we need
    // to update our notification map.

    let ourNotifications = this._getNotificationsForBrowser(ourBrowser);
    let other = otherBrowser.ownerDocument.defaultView.PopupNotifications;
    if (!other) {
      if (ourNotifications.length > 0)
        Cu.reportError("unable to swap notifications: otherBrowser doesn't support notifications");
      return;
    }
    let otherNotifications = other._getNotificationsForBrowser(otherBrowser);
    if (ourNotifications.length < 1 && otherNotifications.length < 1) {
      // No notification to swap.
      return;
    }

    otherNotifications = otherNotifications.filter(n => {
      if (this._fireCallback(n, NOTIFICATION_EVENT_SWAPPING, ourBrowser)) {
        n.browser = ourBrowser;
        n.owner = this;
        return true;
      }
      other._fireCallback(n, NOTIFICATION_EVENT_REMOVED);
      return false;
    });

    ourNotifications = ourNotifications.filter(n => {
      if (this._fireCallback(n, NOTIFICATION_EVENT_SWAPPING, otherBrowser)) {
        n.browser = otherBrowser;
        n.owner = other;
        return true;
      }
      this._fireCallback(n, NOTIFICATION_EVENT_REMOVED);
      return false;
    });

    this._setNotificationsForBrowser(otherBrowser, ourNotifications);
    other._setNotificationsForBrowser(ourBrowser, otherNotifications);

    if (otherNotifications.length > 0)
      this._update(otherNotifications, otherNotifications[0].anchorElement);
    if (ourNotifications.length > 0)
      other._update(ourNotifications, ourNotifications[0].anchorElement);
  },

  _fireCallback: function PopupNotifications_fireCallback(n, event, ...args) {
    try {
      if (n.options.eventCallback)
        return n.options.eventCallback.call(n, event, ...args);
    } catch (error) {
      Cu.reportError(error);
    }
    return undefined;
  },

  _onPopupHidden: function PopupNotifications_onPopupHidden(event) {
    if (event.target != this.panel || this._ignoreDismissal)
      return;

    let browser = this.panel.firstChild &&
                  this.panel.firstChild.notification.browser;
    if (!browser)
      return;

    let notifications = this._getNotificationsForBrowser(browser);
    // Mark notifications as dismissed and call dismissal callbacks
    Array.forEach(this.panel.childNodes, function (nEl) {
      let notificationObj = nEl.notification;
      // Never call a dismissal handler on a notification that's been removed.
      if (notifications.indexOf(notificationObj) == -1)
        return;

      // Do not mark the notification as dismissed or fire NOTIFICATION_EVENT_DISMISSED
      // if the notification is removed.
      if (notificationObj.options.removeOnDismissal)
        this._remove(notificationObj);
      else {
        notificationObj.dismissed = true;
        this._fireCallback(notificationObj, NOTIFICATION_EVENT_DISMISSED);
      }
    }, this);

    this._clearPanel();

    this._update();
  },

  _onButtonCommand: function PopupNotifications_onButtonCommand(event) {
    let notificationEl = getNotificationFromElement(event.originalTarget);

    if (!notificationEl)
      throw "PopupNotifications_onButtonCommand: couldn't find notification element";

    if (!notificationEl.notification)
      throw "PopupNotifications_onButtonCommand: couldn't find notification";

    let notification = notificationEl.notification;
    let timeSinceShown = this.window.performance.now() - notification.timeShown;

    // Only report the first time mainAction is triggered and remember that this occurred.
    if (!notification.timeMainActionFirstTriggered) {
      notification.timeMainActionFirstTriggered = timeSinceShown;
    }

    if (timeSinceShown < this.buttonDelay) {
      Services.console.logStringMessage("PopupNotifications_onButtonCommand: " +
                                        "Button click happened before the security delay: " +
                                        timeSinceShown + "ms");
      return;
    }

    try {   
      notification.mainAction.callback.call(undefined, {
        checkboxChecked: notificationEl.checkbox.checked
      });
    } catch (error) {
      Cu.reportError(error);
    }

    this._remove(notification);
    this._update();
  },

  _onMenuCommand: function PopupNotifications_onMenuCommand(event) {
    let target = event.originalTarget;
    if (!target.action || !target.notification)
      throw "menucommand target has no associated action/notification";

    let notificationEl = target.parentElement;
    event.stopPropagation();
    
    try {
      target.action.callback.call(undefined, {
        checkboxChecked: notificationEl.checkbox.checked
      });
    } catch (error) {
      Cu.reportError(error);
    }

    this._remove(target.notification);
    this._update();
  },

  _notify: function PopupNotifications_notify(topic) {
    Services.obs.notifyObservers(null, "PopupNotifications-" + topic, "");
  },
};