summaryrefslogtreecommitdiffstats
path: root/base/content/browser-places.js
blob: 590fe7ecd97ddcb4e179fe0e745a6bf035201a6c (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
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
# 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/.

////////////////////////////////////////////////////////////////////////////////
//// StarUI

var StarUI = {
  _itemId: -1,
  uri: null,
  _batching: false,

  _element: function(aID) {
    return document.getElementById(aID);
  },

  // Edit-bookmark panel
  get panel() {
    delete this.panel;
    var element = this._element("editBookmarkPanel");
    // initially the panel is hidden
    // to avoid impacting startup / new window performance
    element.hidden = false;
    element.addEventListener("popuphidden", this, false);
    element.addEventListener("keypress", this, false);
    return this.panel = element;
  },

  // Array of command elements to disable when the panel is opened.
  get _blockedCommands() {
    delete this._blockedCommands;
    return this._blockedCommands =
      ["cmd_close", "cmd_closeWindow"].map(function (id) this._element(id), this);
  },

  _blockCommands: function SU__blockCommands() {
    this._blockedCommands.forEach(function (elt) {
      // make sure not to permanently disable this item (see bug 409155)
      if (elt.hasAttribute("wasDisabled"))
        return;
      if (elt.getAttribute("disabled") == "true") {
        elt.setAttribute("wasDisabled", "true");
      } else {
        elt.setAttribute("wasDisabled", "false");
        elt.setAttribute("disabled", "true");
      }
    });
  },

  _restoreCommandsState: function SU__restoreCommandsState() {
    this._blockedCommands.forEach(function (elt) {
      if (elt.getAttribute("wasDisabled") != "true")
        elt.removeAttribute("disabled");
      elt.removeAttribute("wasDisabled");
    });
  },

  // nsIDOMEventListener
  handleEvent: function SU_handleEvent(aEvent) {
    switch (aEvent.type) {
      case "popuphidden":
        if (aEvent.originalTarget == this.panel) {
          if (!this._element("editBookmarkPanelContent").hidden)
            this.quitEditMode();

          this._restoreCommandsState();
          this._itemId = -1;
          if (this._batching) {
            PlacesUtils.transactionManager.endBatch(false);
            this._batching = false;
          }

          switch (this._actionOnHide) {
            case "cancel": {
              PlacesUtils.transactionManager.undoTransaction();
              break;
            }
            case "remove": {
              // Remove all bookmarks for the bookmark's url, this also removes
              // the tags for the url.
              PlacesUtils.transactionManager.beginBatch(null);
              let itemIds = PlacesUtils.getBookmarksForURI(this._uriForRemoval);
              for (let i = 0; i < itemIds.length; i++) {
                let txn = new PlacesRemoveItemTransaction(itemIds[i]);
                PlacesUtils.transactionManager.doTransaction(txn);
              }
              PlacesUtils.transactionManager.endBatch(false);
              break;
            }
          }
          this._actionOnHide = "";
        }
        break;
      case "keypress":
        if (aEvent.defaultPrevented) {
          // The event has already been consumed inside of the panel.
          break;
        }
        switch (aEvent.keyCode) {
          case KeyEvent.DOM_VK_ESCAPE:
            if (!this._element("editBookmarkPanelContent").hidden)
              this.cancelButtonOnCommand();
            break;
          case KeyEvent.DOM_VK_RETURN:
            if (aEvent.target.className == "expander-up" ||
                aEvent.target.className == "expander-down" ||
                aEvent.target.id == "editBMPanel_newFolderButton") {
              //XXX Why is this necessary? The defaultPrevented check should
              //    be enough.
              break;
            }
            this.panel.hidePopup();
            break;
        }
        break;
    }
  },

  _overlayLoaded: false,
  _overlayLoading: false,
  showEditBookmarkPopup:
  function SU_showEditBookmarkPopup(aItemId, aAnchorElement, aPosition) {
    // Performance: load the overlay the first time the panel is opened
    // (see bug 392443).
    if (this._overlayLoading)
      return;

    if (this._overlayLoaded) {
      this._doShowEditBookmarkPanel(aItemId, aAnchorElement, aPosition);
      return;
    }

    this._overlayLoading = true;
    document.loadOverlay(
      "chrome://browser/content/places/editBookmarkOverlay.xul",
      (function (aSubject, aTopic, aData) {
        //XXX We just caused localstore.rdf to be re-applied (bug 640158)
        retrieveToolbarIconsizesFromTheme();

        // Move the header (star, title, button) into the grid,
        // so that it aligns nicely with the other items (bug 484022).
        let header = this._element("editBookmarkPanelHeader");
        let rows = this._element("editBookmarkPanelGrid").lastChild;
        rows.insertBefore(header, rows.firstChild);
        header.hidden = false;

        this._overlayLoading = false;
        this._overlayLoaded = true;
        this._doShowEditBookmarkPanel(aItemId, aAnchorElement, aPosition);
      }).bind(this)
    );
  },

  _doShowEditBookmarkPanel:
  function SU__doShowEditBookmarkPanel(aItemId, aAnchorElement, aPosition) {
    if (this.panel.state != "closed")
      return;

    this._blockCommands(); // un-done in the popuphiding handler

    // Set panel title:
    // if we are batching, i.e. the bookmark has been added now,
    // then show Page Bookmarked, else if the bookmark did already exist,
    // we are about editing it, then use Edit This Bookmark.
    this._element("editBookmarkPanelTitle").value =
      this._batching ?
        gNavigatorBundle.getString("editBookmarkPanel.pageBookmarkedTitle") :
        gNavigatorBundle.getString("editBookmarkPanel.editBookmarkTitle");

    // No description; show the Done, Cancel;
    this._element("editBookmarkPanelDescription").textContent = "";
    this._element("editBookmarkPanelBottomButtons").hidden = false;
    this._element("editBookmarkPanelContent").hidden = false;

    // The remove button is shown only if we're not already batching, i.e.
    // if the cancel button/ESC does not remove the bookmark.
    this._element("editBookmarkPanelRemoveButton").hidden = this._batching;

    // The label of the remove button differs if the URI is bookmarked
    // multiple times.
    var bookmarks = PlacesUtils.getBookmarksForURI(gBrowser.currentURI);
    var forms = gNavigatorBundle.getString("editBookmark.removeBookmarks.label");
    var label = PluralForm.get(bookmarks.length, forms).replace("#1", bookmarks.length);
    this._element("editBookmarkPanelRemoveButton").label = label;

    // unset the unstarred state, if set
    this._element("editBookmarkPanelStarIcon").removeAttribute("unstarred");

    this._itemId = aItemId !== undefined ? aItemId : this._itemId;
    this.beginBatch();

    let onPanelReady = fn => {
      let target = this.panel;
      if (target.parentNode) {
        // By targeting the panel's parent and using a capturing listener, we
        // can have our listener called before others waiting for the panel to
        // be shown (which probably expect the panel to be fully initialized)
        target = target.parentNode;
      }
      target.addEventListener("popupshown", function(event) {
        fn();
      }, {"capture": true, "once": true});
    };
    gEditItemOverlay.initPanel(this._itemId,
                               { onPanelReady,
                                 hiddenRows: ["description", "location",
                                              "loadInSidebar", "keyword"] });

    this.panel.openPopup(aAnchorElement, aPosition);
  },

  panelShown:
  function SU_panelShown(aEvent) {
    if (aEvent.target == this.panel) {
      if (!this._element("editBookmarkPanelContent").hidden) {
        let fieldToFocus = "editBMPanel_" +
          gPrefService.getCharPref("browser.bookmarks.editDialog.firstEditField");
        var elt = this._element(fieldToFocus);
        elt.focus();
        elt.select();
      }
      else {
        // Note this isn't actually used anymore, we should remove this
        // once we decide not to bring back the page bookmarked notification
        this.panel.focus();
      }
    }
  },

  quitEditMode: function SU_quitEditMode() {
    this._element("editBookmarkPanelContent").hidden = true;
    this._element("editBookmarkPanelBottomButtons").hidden = true;
    gEditItemOverlay.uninitPanel(true);
  },

  cancelButtonOnCommand: function SU_cancelButtonOnCommand() {
    this._actionOnHide = "cancel";
    this.panel.hidePopup();
  },

  removeBookmarkButtonCommand: function SU_removeBookmarkButtonCommand() {
    this._uriForRemoval = PlacesUtils.bookmarks.getBookmarkURI(this._itemId);
    this._actionOnHide = "remove";
    this.panel.hidePopup();
  },

  beginBatch: function SU_beginBatch() {
    if (!this._batching) {
      PlacesUtils.transactionManager.beginBatch(null);
      this._batching = true;
    }
  }
}

////////////////////////////////////////////////////////////////////////////////
//// PlacesCommandHook

var PlacesCommandHook = {
  /**
   * Adds a bookmark to the page loaded in the given browser.
   *
   * @param aBrowser
   *        a <browser> element.
   * @param [optional] aParent
   *        The folder in which to create a new bookmark if the page loaded in
   *        aBrowser isn't bookmarked yet, defaults to the unfiled root.
   * @param [optional] aShowEditUI
   *        whether or not to show the edit-bookmark UI for the bookmark item
   */  
  bookmarkPage: function PCH_bookmarkPage(aBrowser, aParent, aShowEditUI) {
    var uri = aBrowser.currentURI;
    var itemId = PlacesUtils.getMostRecentBookmarkForURI(uri);
    if (itemId == -1) {
      // Copied over from addBookmarkForBrowser:
      // Bug 52536: We obtain the URL and title from the nsIWebNavigation
      // associated with a <browser/> rather than from a DOMWindow.
      // This is because when a full page plugin is loaded, there is
      // no DOMWindow (?) but information about the loaded document
      // may still be obtained from the webNavigation.
      var webNav = aBrowser.webNavigation;
      var url = webNav.currentURI;
      var title;
      var description;
      var charset;
      try {
        let isErrorPage = /^about:(neterror|certerror|blocked)/
                          .test(webNav.document.documentURI);
        title = isErrorPage ? PlacesUtils.history.getPageTitle(url)
                            : webNav.document.title;
        title = title || url.spec;
        description = PlacesUIUtils.getDescriptionFromDocument(webNav.document);
        charset = webNav.document.characterSet;
      }
      catch (e) { }

      if (aShowEditUI) {
        // If we bookmark the page here (i.e. page was not "starred" already)
        // but open right into the "edit" state, start batching here, so
        // "Cancel" in that state removes the bookmark.
        StarUI.beginBatch();
      }

      var parent = aParent != undefined ?
                   aParent : PlacesUtils.unfiledBookmarksFolderId;
      var descAnno = { name: PlacesUIUtils.DESCRIPTION_ANNO, value: description };
      var txn = new PlacesCreateBookmarkTransaction(uri, parent, 
                                                    PlacesUtils.bookmarks.DEFAULT_INDEX,
                                                    title, null, [descAnno]);
      PlacesUtils.transactionManager.doTransaction(txn);
      itemId = txn.item.id;
      // Set the character-set
      if (charset && !PrivateBrowsingUtils.isWindowPrivate(aBrowser.contentWindow))
        PlacesUtils.setCharsetForURI(uri, charset);
    }

    // Revert the contents of the location bar
    if (gURLBar)
      gURLBar.handleRevert();

    // If it was not requested to open directly in "edit" mode, we are done.
    if (!aShowEditUI)
      return;

    // Try to dock the panel to:
    // 1. the bookmarks menu button
    // 2. the page-proxy-favicon
    // 3. the content area
    if (BookmarkingUI.anchor) {
      StarUI.showEditBookmarkPopup(itemId, BookmarkingUI.anchor,
                                   "bottomcenter topright");
      return;
    }

    let pageProxyFavicon = document.getElementById("page-proxy-favicon");
    if (isElementVisible(pageProxyFavicon)) {
      StarUI.showEditBookmarkPopup(itemId, pageProxyFavicon,
                                   "bottomcenter topright");
    } else {
      StarUI.showEditBookmarkPopup(itemId, aBrowser, "overlap");
    }
  },

  /**
   * Adds a bookmark to the page loaded in the current tab. 
   */
  bookmarkCurrentPage: function PCH_bookmarkCurrentPage(aShowEditUI, aParent) {
    this.bookmarkPage(gBrowser.selectedBrowser, aParent, aShowEditUI);
  },

  /**
   * Adds a bookmark to the page targeted by a link.
   * @param aParent
   *        The folder in which to create a new bookmark if aURL isn't
   *        bookmarked.
   * @param aURL (string)
   *        the address of the link target
   * @param aTitle
   *        The link text
   */
  bookmarkLink: function PCH_bookmarkLink(aParent, aURL, aTitle) {
    var linkURI = makeURI(aURL);
    var itemId = PlacesUtils.getMostRecentBookmarkForURI(linkURI);
    if (itemId == -1) {
      PlacesUIUtils.showBookmarkDialog({ action: "add"
                                       , type: "bookmark"
                                       , uri: linkURI
                                       , title: aTitle
                                       , hiddenRows: [ "description"
                                                     , "location"
                                                     , "loadInSidebar"
                                                     , "keyword" ]
                                       }, window);
    }
    else {
      PlacesUIUtils.showBookmarkDialog({ action: "edit"
                                       , type: "bookmark"
                                       , itemId: itemId
                                       }, window);
    }
  },

  /**
   * List of nsIURI objects characterizing the tabs currently open in the
   * browser, modulo pinned tabs.  The URIs will be in the order in which their
   * corresponding tabs appeared and duplicates are discarded.
   */
  get uniqueCurrentPages() {
    let uniquePages = {};
    let URIs = [];
    gBrowser.visibleTabs.forEach(function (tab) {
      let spec = tab.linkedBrowser.currentURI.spec;
      if (!tab.pinned && !(spec in uniquePages)) {
        uniquePages[spec] = null;
        URIs.push(tab.linkedBrowser.currentURI);
      }
    });
    return URIs;
  },

  /**
   * Adds a folder with bookmarks to all of the currently open tabs in this 
   * window.
   */
  bookmarkCurrentPages: function PCH_bookmarkCurrentPages() {
    let pages = this.uniqueCurrentPages;
    if (pages.length > 1) {
    PlacesUIUtils.showBookmarkDialog({ action: "add"
                                     , type: "folder"
                                     , URIList: pages
                                     , hiddenRows: [ "description" ]
                                     }, window);
    }
  },

  /**
   * Updates disabled state for the "Bookmark All Tabs" command.
   */
  updateBookmarkAllTabsCommand:
  function PCH_updateBookmarkAllTabsCommand() {
    // There's nothing to do in non-browser windows.
    if (window.location.href != getBrowserURL())
      return;

    // Disable "Bookmark All Tabs" if there are less than two
    // "unique current pages".
    goSetCommandEnabled("Browser:BookmarkAllTabs",
                        this.uniqueCurrentPages.length >= 2);
  },

  /**
   * Adds a Live Bookmark to a feed associated with the current page. 
   * @param     url
   *            The nsIURI of the page the feed was attached to
   * @title     title
   *            The title of the feed. Optional.
   * @subtitle  subtitle
   *            A short description of the feed. Optional.
   */
  addLiveBookmark: function PCH_addLiveBookmark(url, feedTitle, feedSubtitle) {
    let toolbarIP = new InsertionPoint(PlacesUtils.toolbarFolderId, -1);

    let feedURI = makeURI(url);
    let title = feedTitle || gBrowser.contentTitle;
    let description = feedSubtitle;
    if (!description) {
      description = PlacesUIUtils.getDescriptionFromDocument(gBrowser.contentDocument);
    }

    PlacesUIUtils.showBookmarkDialog({ action: "add"
                                     , type: "livemark"
                                     , feedURI: feedURI
                                     , siteURI: gBrowser.currentURI
                                     , title: title
                                     , description: description
                                     , defaultInsertionPoint: toolbarIP
                                     , hiddenRows: [ "feedLocation"
                                                   , "siteLocation"
                                                   , "description" ]
                                     }, window);
  },

  /**
   * Opens the Places Organizer. 
   * @param   aLeftPaneRoot
   *          The query to select in the organizer window - options
   *          are: History, AllBookmarks, BookmarksMenu, BookmarksToolbar,
   *          UnfiledBookmarks, Tags and Downloads.
   */
  showPlacesOrganizer: function PCH_showPlacesOrganizer(aLeftPaneRoot) {
    var organizer = Services.wm.getMostRecentWindow("Places:Organizer");
    // Due to bug 528706, getMostRecentWindow can return closed windows.
    if (!organizer || organizer.closed) {
      // No currently open places window, so open one with the specified mode.
      openDialog("chrome://browser/content/places/places.xul", 
                 "", "chrome,toolbar=yes,dialog=no,resizable", aLeftPaneRoot);
    }
    else {
      organizer.PlacesOrganizer.selectLeftPaneQuery(aLeftPaneRoot);
      organizer.focus();
    }
  }
};

////////////////////////////////////////////////////////////////////////////////
//// HistoryMenu

// View for the history menu.
function HistoryMenu(aPopupShowingEvent) {
  // Workaround for Bug 610187.  The sidebar does not include all the Places
  // views definitions, and we don't need them there.
  // Defining the prototype inheritance in the prototype itself would cause
  // browser.js to halt on "PlacesMenu is not defined" error.
  this.__proto__.__proto__ = PlacesMenu.prototype;
  XPCOMUtils.defineLazyServiceGetter(this, "_ss",
                                     "@mozilla.org/browser/sessionstore;1",
                                     "nsISessionStore");
  PlacesMenu.call(this, aPopupShowingEvent,
                  "place:sort=4&maxResults=15");
}

HistoryMenu.prototype = {
  toggleRestoreLastSession: function HM_toggleRestoreLastSession() {
    let restoreItem = this._rootElt.ownerDocument.getElementById("Browser:RestoreLastSession");
    
    if (this._ss.canRestoreLastSession &&
        !PrivateBrowsingUtils.isWindowPrivate(window))
      restoreItem.removeAttribute("disabled");
    else
      restoreItem.setAttribute("disabled", true);
  },
 
  toggleRecentlyClosedTabs: function HM_toggleRecentlyClosedTabs() {
    // enable/disable the Recently Closed Tabs sub menu
    var undoMenu = this._rootElt.getElementsByClassName("recentlyClosedTabsMenu")[0];

    // no restorable tabs, so disable menu
    if (this._ss.getClosedTabCount(window) == 0)
      undoMenu.setAttribute("disabled", true);
    else
      undoMenu.removeAttribute("disabled");
  },

  /**
    * Re-open a closed tab and put it to the end of the tab strip.
    * Used for a middle click.
    * @param aEvent
    *        The event when the user clicks the menu item
    */
  _undoCloseMiddleClick: function PHM__undoCloseMiddleClick(aEvent) {
    if (aEvent.button != 1)
      return;

    undoCloseTab(aEvent.originalTarget.value);
    gBrowser.moveTabToEnd();
  },

  /**
   * Populate when the history menu is opened
   */
  populateUndoSubmenu: function PHM_populateUndoSubmenu() {
    var undoMenu = this._rootElt.getElementsByClassName("recentlyClosedTabsMenu")[0];
    var undoPopup = undoMenu.firstChild;

    // remove existing menu items
    while (undoPopup.hasChildNodes())
      undoPopup.removeChild(undoPopup.firstChild);

    // no restorable tabs, so make sure menu is disabled, and return
    if (this._ss.getClosedTabCount(window) == 0) {
      undoMenu.setAttribute("disabled", true);
      return;
    }

    // enable menu
    undoMenu.removeAttribute("disabled");

    // populate menu
    var undoItems = JSON.parse(this._ss.getClosedTabData(window));
    for (var i = 0; i < undoItems.length; i++) {
      var m = document.createElement("menuitem");
      m.setAttribute("label", undoItems[i].title);
      if (undoItems[i].image) {
        let iconURL = undoItems[i].image;
        // don't initiate a connection just to fetch a favicon (see bug 467828)
        if (/^https?:/.test(iconURL))
          iconURL = "moz-anno:favicon:" + iconURL;
        m.setAttribute("image", iconURL);
      }
      m.setAttribute("class", "menuitem-iconic bookmark-item menuitem-with-favicon");
      m.setAttribute("value", i);
      m.setAttribute("oncommand", "undoCloseTab(" + i + ");");

      // Set the targetURI attribute so it will be shown in tooltip and trigger
      // onLinkHovered. SessionStore uses one-based indexes, so we need to
      // normalize them.
      let tabData = undoItems[i].state;
      let activeIndex = (tabData.index || tabData.entries.length) - 1;
      if (activeIndex >= 0 && tabData.entries[activeIndex])
        m.setAttribute("targetURI", tabData.entries[activeIndex].url);

      m.addEventListener("click", this._undoCloseMiddleClick, false);
      if (i == 0)
        m.setAttribute("key", "key_undoCloseTab");
      undoPopup.appendChild(m);
    }

    // "Restore All Tabs"
    var strings = gNavigatorBundle;
    undoPopup.appendChild(document.createElement("menuseparator"));
    m = undoPopup.appendChild(document.createElement("menuitem"));
    m.id = "menu_restoreAllTabs";
    m.setAttribute("label", strings.getString("menuRestoreAllTabs.label"));
    m.addEventListener("command", function() {
      for (var i = 0; i < undoItems.length; i++)
        undoCloseTab();
    }, false);
  },

  toggleRecentlyClosedWindows: function PHM_toggleRecentlyClosedWindows() {
    // enable/disable the Recently Closed Windows sub menu
    var undoMenu = this._rootElt.getElementsByClassName("recentlyClosedWindowsMenu")[0];

    // no restorable windows, so disable menu
    if (this._ss.getClosedWindowCount() == 0)
      undoMenu.setAttribute("disabled", true);
    else
      undoMenu.removeAttribute("disabled");
  },

  /**
   * Populate when the history menu is opened
   */
  populateUndoWindowSubmenu: function PHM_populateUndoWindowSubmenu() {
    let undoMenu = this._rootElt.getElementsByClassName("recentlyClosedWindowsMenu")[0];
    let undoPopup = undoMenu.firstChild;
    let menuLabelString = gNavigatorBundle.getString("menuUndoCloseWindowLabel");
    let menuLabelStringSingleTab =
      gNavigatorBundle.getString("menuUndoCloseWindowSingleTabLabel");

    // remove existing menu items
    while (undoPopup.hasChildNodes())
      undoPopup.removeChild(undoPopup.firstChild);

    // no restorable windows, so make sure menu is disabled, and return
    if (this._ss.getClosedWindowCount() == 0) {
      undoMenu.setAttribute("disabled", true);
      return;
    }

    // enable menu
    undoMenu.removeAttribute("disabled");

    // populate menu
    let undoItems = JSON.parse(this._ss.getClosedWindowData());
    for (let i = 0; i < undoItems.length; i++) {
      let undoItem = undoItems[i];
      let otherTabsCount = undoItem.tabs.length - 1;
      let label = (otherTabsCount == 0) ? menuLabelStringSingleTab
                                        : PluralForm.get(otherTabsCount, menuLabelString);
      let menuLabel = label.replace("#1", undoItem.title)
                           .replace("#2", otherTabsCount);
      let m = document.createElement("menuitem");
      m.setAttribute("label", menuLabel);
      let selectedTab = undoItem.tabs[undoItem.selected - 1];
      if (selectedTab.image) {
        let iconURL = selectedTab.image;
        // don't initiate a connection just to fetch a favicon (see bug 467828)
        if (/^https?:/.test(iconURL))
          iconURL = "moz-anno:favicon:" + iconURL;
        m.setAttribute("image", iconURL);
      }
      m.setAttribute("class", "menuitem-iconic bookmark-item menuitem-with-favicon");
      m.setAttribute("oncommand", "undoCloseWindow(" + i + ");");

      // Set the targetURI attribute so it will be shown in tooltip.
      // SessionStore uses one-based indexes, so we need to normalize them.
      let activeIndex = (selectedTab.index || selectedTab.entries.length) - 1;
      if (activeIndex >= 0 && selectedTab.entries[activeIndex])
        m.setAttribute("targetURI", selectedTab.entries[activeIndex].url);

      if (i == 0)
        m.setAttribute("key", "key_undoCloseWindow");
      undoPopup.appendChild(m);
    }

    // "Open All in Windows"
    undoPopup.appendChild(document.createElement("menuseparator"));
    let m = undoPopup.appendChild(document.createElement("menuitem"));
    m.id = "menu_restoreAllWindows";
    m.setAttribute("label", gNavigatorBundle.getString("menuRestoreAllWindows.label"));
    m.setAttribute("oncommand",
      "for (var i = 0; i < " + undoItems.length + "; i++) undoCloseWindow();");
  },

  toggleTabsFromOtherComputers: function PHM_toggleTabsFromOtherComputers() {
    // This is a no-op if MOZ_SERVICES_SYNC isn't defined
#ifdef MOZ_SERVICES_SYNC
    // Enable/disable the Tabs From Other Computers menu. Some of the menus handled
    // by HistoryMenu do not have this menuitem.
    let menuitem = this._rootElt.getElementsByClassName("syncTabsMenuItem")[0];
    if (!menuitem)
      return;

    // If Sync isn't configured yet, then don't show the menuitem.
    if (Weave.Status.checkSetup() == Weave.CLIENT_NOT_CONFIGURED ||
        Weave.Svc.Prefs.get("firstSync", "") == "notReady") {
      menuitem.setAttribute("hidden", true);
      return;
    }

    // The tabs engine might never be inited (if services.sync.registerEngines
    // is modified), so make sure we avoid undefined errors.
    let enabled = Weave.Service.isLoggedIn &&
                  Weave.Service.engineManager.get("tabs") &&
                  Weave.Service.engineManager.get("tabs").enabled;
    menuitem.setAttribute("disabled", !enabled);
    menuitem.setAttribute("hidden", false);
#endif
  },

  _onPopupShowing: function HM__onPopupShowing(aEvent) {
    PlacesMenu.prototype._onPopupShowing.apply(this, arguments);

    // Don't handle events for submenus.
    if (aEvent.target != aEvent.currentTarget)
      return;

    this.toggleRestoreLastSession();
    this.toggleRecentlyClosedTabs();
    this.toggleRecentlyClosedWindows();
    this.toggleTabsFromOtherComputers();
  },

  _onCommand: function HM__onCommand(aEvent) {
    let placesNode = aEvent.target._placesNode;
    if (placesNode) {
      if (!PrivateBrowsingUtils.isWindowPrivate(window))
        PlacesUIUtils.markPageAsTyped(placesNode.uri);
      openUILink(placesNode.uri, aEvent, { ignoreAlt: true });
    }
  }
};

////////////////////////////////////////////////////////////////////////////////
//// BookmarksEventHandler

/**
 * Functions for handling events in the Bookmarks Toolbar and menu.
 */
var BookmarksEventHandler = {
  /**
   * Handler for click event for an item in the bookmarks toolbar or menu.
   * Menus and submenus from the folder buttons bubble up to this handler.
   * Left-click is handled in the onCommand function.
   * When items are middle-clicked (or clicked with modifier), open in tabs.
   * If the click came through a menu, close the menu.
   * @param aEvent
   *        DOMEvent for the click
   * @param aView
   *        The places view which aEvent should be associated with.
   */
  onClick: function BEH_onClick(aEvent, aView) {
    // Only handle middle-click or left-click with modifiers.
#ifdef XP_MACOSX
    var modifKey = aEvent.metaKey || aEvent.shiftKey;
#else
    var modifKey = aEvent.ctrlKey || aEvent.shiftKey;
#endif
    if (aEvent.button == 2 || (aEvent.button == 0 && !modifKey))
      return;

    var target = aEvent.originalTarget;
    // If this event bubbled up from a menu or menuitem, close the menus.
    // Do this before opening tabs, to avoid hiding the open tabs confirm-dialog.
    if (target.localName == "menu" || target.localName == "menuitem") {
      for (node = target.parentNode; node; node = node.parentNode) {
        if (node.localName == "menupopup")
          node.hidePopup();
        else if (node.localName != "menu" &&
                 node.localName != "splitmenu" &&
                 node.localName != "hbox" &&
                 node.localName != "vbox" )
          break;
      }
    }

    if (target._placesNode && PlacesUtils.nodeIsContainer(target._placesNode)) {
      // Don't open the root folder in tabs when the empty area on the toolbar
      // is middle-clicked or when a non-bookmark item except for Open in Tabs)
      // in a bookmarks menupopup is middle-clicked.
      if (target.localName == "menu" || target.localName == "toolbarbutton")
        PlacesUIUtils.openContainerNodeInTabs(target._placesNode, aEvent, aView);
    }
    else if (aEvent.button == 1) {
      // left-clicks with modifier are already served by onCommand
      this.onCommand(aEvent, aView);
    }
  },

  /**
   * Handler for command event for an item in the bookmarks toolbar.
   * Menus and submenus from the folder buttons bubble up to this handler.
   * Opens the item.
   * @param aEvent 
   *        DOMEvent for the command
   * @param aView
   *        The places view which aEvent should be associated with.
   */
  onCommand: function BEH_onCommand(aEvent, aView) {
    var target = aEvent.originalTarget;
    if (target._placesNode)
      PlacesUIUtils.openNodeWithEvent(target._placesNode, aEvent, aView);
  },

  fillInBHTooltip: function BEH_fillInBHTooltip(aDocument, aEvent) {
    var node;
    var cropped = false;
    var targetURI;

    if (aDocument.tooltipNode.localName == "treechildren") {
      var tree = aDocument.tooltipNode.parentNode;
      var tbo = tree.treeBoxObject;
      var cell = tbo.getCellAt(aEvent.clientX, aEvent.clientY);
      if (cell.row == -1)
        return false;
      node = tree.view.nodeForTreeIndex(cell.row);
      cropped = tbo.isCellCropped(cell.row, cell.col);
    }
    else {
      // Check whether the tooltipNode is a Places node.
      // In such a case use it, otherwise check for targetURI attribute.
      var tooltipNode = aDocument.tooltipNode;
      if (tooltipNode._placesNode)
        node = tooltipNode._placesNode;
      else {
        // This is a static non-Places node.
        targetURI = tooltipNode.getAttribute("targetURI");
      }
    }

    if (!node && !targetURI)
      return false;

    // Show node.label as tooltip's title for non-Places nodes.
    var title = node ? node.title : tooltipNode.label;

    // Show URL only for Places URI-nodes or nodes with a targetURI attribute.
    var url;
    if (targetURI || PlacesUtils.nodeIsURI(node))
      url = targetURI || node.uri;

    // Show tooltip for containers only if their title is cropped.
    if (!cropped && !url)
      return false;

    var tooltipTitle = aDocument.getElementById("bhtTitleText");
    tooltipTitle.hidden = (!title || (title == url));
    if (!tooltipTitle.hidden)
      tooltipTitle.textContent = title;

    var tooltipUrl = aDocument.getElementById("bhtUrlText");
    tooltipUrl.hidden = !url;
    if (!tooltipUrl.hidden)
      tooltipUrl.value = url;

    // Show tooltip.
    return true;
  }
};

////////////////////////////////////////////////////////////////////////////////
//// PlacesMenuDNDHandler

// Handles special drag and drop functionality for Places menus that are not
// part of a Places view (e.g. the bookmarks menu in the menubar).
var PlacesMenuDNDHandler = {
  _springLoadDelay: 350, // milliseconds
  _loadTimer: null,
  _closerTimer: null,

  /**
   * Called when the user enters the <menu> element during a drag.
   * @param   event
   *          The DragEnter event that spawned the opening. 
   */
  onDragEnter: function PMDH_onDragEnter(event) {
    // Opening menus in a Places popup is handled by the view itself.
    if (!this._isStaticContainer(event.target))
      return;

    let popup = event.target.lastChild;
    if (this._loadTimer || popup.state === "showing" || popup.state === "open")
      return;

    this._loadTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
    this._loadTimer.initWithCallback(() => {
      this._loadTimer = null;
      popup.setAttribute("autoopened", "true");
      popup.showPopup(popup);
    }, this._springLoadDelay, Ci.nsITimer.TYPE_ONE_SHOT);
    event.preventDefault();
    event.stopPropagation();
  },

  /**
   * Handles dragleave on the <menu> element.
   * @returns true if the element is a container element (menu or 
   *          menu-toolbarbutton), false otherwise.
   */
  onDragLeave: function PMDH_onDragLeave(event) {
    // Handle menu-button separate targets.
    if (event.relatedTarget === event.currentTarget ||
        event.relatedTarget.parentNode === event.currentTarget)
      return;

    // Closing menus in a Places popup is handled by the view itself.
    if (!this._isStaticContainer(event.target))
      return;

    let popup = event.target.lastChild;

    if (this._loadTimer) {
      this._loadTimer.cancel();
      this._loadTimer = null;
    }
    this._closeTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
    this._closeTimer.initWithCallback(function() {
      this._closeTimer = null;
      let node = PlacesControllerDragHelper.currentDropTarget;
      let inHierarchy = false;
      while (node && !inHierarchy) {
        inHierarchy = node == event.target;
        node = node.parentNode;
      }
      if (!inHierarchy && popup && popup.hasAttribute("autoopened")) {
        popup.removeAttribute("autoopened");
        popup.hidePopup();
      }
    }, this._springLoadDelay, Ci.nsITimer.TYPE_ONE_SHOT);
  },

  /**
   * Determines if a XUL element represents a static container.
   * @returns true if the element is a container element (menu or 
   *`         menu-toolbarbutton), false otherwise.
   */
  _isStaticContainer: function PMDH__isContainer(node) {
    let isMenu = node.localName == "menu" ||
                 (node.localName == "toolbarbutton" &&
                  (node.getAttribute("type") == "menu" ||
                   node.getAttribute("type") == "menu-button"));
    let isStatic = !("_placesNode" in node) && node.lastChild &&
                   node.lastChild.hasAttribute("placespopup") &&
                   !node.parentNode.hasAttribute("placespopup");
    return isMenu && isStatic;
  },

  /**
   * Called when the user drags over the <menu> element.
   * @param   event
   *          The DragOver event. 
   */
  onDragOver: function PMDH_onDragOver(event) {
    let ip = new InsertionPoint(PlacesUtils.bookmarksMenuFolderId,
                                PlacesUtils.bookmarks.DEFAULT_INDEX,
                                Ci.nsITreeView.DROP_ON);
    if (ip && PlacesControllerDragHelper.canDrop(ip, event.dataTransfer))
      event.preventDefault();

    event.stopPropagation();
  },

  /**
   * Called when the user drops on the <menu> element.
   * @param   event
   *          The Drop event. 
   */
  onDrop: function PMDH_onDrop(event) {
    // Put the item at the end of bookmark menu.
    let ip = new InsertionPoint(PlacesUtils.bookmarksMenuFolderId,
                                PlacesUtils.bookmarks.DEFAULT_INDEX,
                                Ci.nsITreeView.DROP_ON);
    PlacesControllerDragHelper.onDrop(ip, event.dataTransfer);
    event.stopPropagation();
  }
};

////////////////////////////////////////////////////////////////////////////////
//// PlacesToolbarHelper

/**
 * This object handles the initialization and uninitialization of the bookmarks
 * toolbar.
 */
var PlacesToolbarHelper = {
  _place: "place:folder=TOOLBAR",

  get _viewElt() {
    return document.getElementById("PlacesToolbar");
  },

  init: function PTH_init() {
    let viewElt = this._viewElt;
    if (!viewElt || viewElt._placesView)
      return;

    // If the bookmarks toolbar item is hidden because the parent toolbar is
    // collapsed or hidden (i.e. in a popup), spare the initialization.  Also,
    // there is no need to initialize the toolbar if customizing because
    // init() will be called when the customization is done.
    let toolbar = viewElt.parentNode.parentNode;
    if (toolbar.collapsed ||
        getComputedStyle(toolbar, "").display == "none" ||
        this._isCustomizing)
      return;

    new PlacesToolbar(this._place);
  },

  customizeStart: function PTH_customizeStart() {
    let viewElt = this._viewElt;
    if (viewElt && viewElt._placesView)
      viewElt._placesView.uninit();

    this._isCustomizing = true;
  },

  customizeDone: function PTH_customizeDone() {
    this._isCustomizing = false;
    this.init();
  }
};

////////////////////////////////////////////////////////////////////////////////
//// BookmarkingUI

/**
 * Handles the bookmarks star button in the URL bar, as well as the bookmark
 * menu button.
 */

var BookmarkingUI = {
  get button() {
    if (!this._button) {
      this._button = document.getElementById("bookmarks-menu-button");
    }
    return this._button;
  },

  get star() {
    if (!this._star) {
      this._star = document.getElementById("star-button");
    }
    return this._star;
  },

  get anchor() {
    if (this.star && isElementVisible(this.star)) {
      // Anchor to the icon, so the panel looks more natural.
      return this.star;
    }
    return null;
  },

  STATUS_UPDATING: -1,
  STATUS_UNSTARRED: 0,
  STATUS_STARRED: 1,
  get status() {
    if (this._pendingStmt)
      return this.STATUS_UPDATING;
    return this.star &&
           this.star.hasAttribute("starred") ? this.STATUS_STARRED
                                             : this.STATUS_UNSTARRED;
  },

  get _starredTooltip()
  {
    delete this._starredTooltip;
    return this._starredTooltip =
      gNavigatorBundle.getString("starButtonOn.tooltip");
  },

  get _unstarredTooltip()
  {
    delete this._unstarredTooltip;
    return this._unstarredTooltip =
      gNavigatorBundle.getString("starButtonOff.tooltip");
  },

  /**
   * The popup contents must be updated when the user customizes the UI, or
   * changes the personal toolbar collapsed status.  In such a case, any needed
   * change should be handled in the popupshowing helper, for performance
   * reasons.
   */
  _popupNeedsUpdate: true,
  onToolbarVisibilityChange: function BUI_onToolbarVisibilityChange() {
    this._popupNeedsUpdate = true;
  },

  onPopupShowing: function BUI_onPopupShowing(event) {
    // Don't handle events for submenus.
    if (event.target != event.currentTarget)
      return;

    if (!this._popupNeedsUpdate)
      return;
    this._popupNeedsUpdate = false;

    let popup = event.target;
    let getPlacesAnonymousElement =
      aAnonId => document.getAnonymousElementByAttribute(popup.parentNode,
                                                         "placesanonid",
                                                         aAnonId);

    let viewToolbarMenuitem = getPlacesAnonymousElement("view-toolbar");
    if (viewToolbarMenuitem) {
      // Update View bookmarks toolbar checkbox menuitem.
      let personalToolbar = document.getElementById("PersonalToolbar");
      viewToolbarMenuitem.setAttribute("checked", !personalToolbar.collapsed);
    }

    let toolbarMenuitem = getPlacesAnonymousElement("toolbar-autohide");
    if (toolbarMenuitem) {
      // If bookmarks items are visible, hide Bookmarks Toolbar menu and the
      // separator after it.
      toolbarMenuitem.collapsed = toolbarMenuitem.nextSibling.collapsed =
        isElementVisible(document.getElementById("personal-bookmarks"));
    }
  },

  /**
   * Handles star styling based on page proxy state changes.
   */
  onPageProxyStateChanged: function BUI_onPageProxyStateChanged(aState) {
    if (!this.star) {
      return;
    }

    if (aState == "invalid") {
      this.star.setAttribute("disabled", "true");
      this.star.removeAttribute("starred");
    }
    else {
      this.star.removeAttribute("disabled");
    }
  },

  _updateToolbarStyle: function BUI__updateToolbarStyle() {
    if (!this.button) {
      return;
    }

    let personalToolbar = document.getElementById("PersonalToolbar");
    let onPersonalToolbar = this.button.parentNode == personalToolbar ||
                            this.button.parentNode.parentNode == personalToolbar;

    if (onPersonalToolbar) {
      this.button.classList.add("bookmark-item");
      this.button.classList.remove("toolbarbutton-1");
    }
    else {
      this.button.classList.remove("bookmark-item");
      this.button.classList.add("toolbarbutton-1");
    }
  },

  _uninitView: function BUI__uninitView() {
    // When an element with a placesView attached is removed and re-inserted,
    // XBL reapplies the binding causing any kind of issues and possible leaks,
    // so kill current view and let popupshowing generate a new one.
    if (this.button && this.button._placesView) {
      this.button._placesView.uninit();
    }
    // Also uninit the main menubar placesView, since it would have the same
    // issues.
    let menubar = document.getElementById("bookmarksMenu");
    if (menubar && menubar._placesView) {
      menubar._placesView.uninit();
    }
  },

  customizeStart: function BUI_customizeStart() {
    this._uninitView();
  },

  customizeChange: function BUI_customizeChange() {
    this._updateToolbarStyle();
  },

  customizeDone: function BUI_customizeDone() {
    delete this._button;
    this.onToolbarVisibilityChange();
    this._updateToolbarStyle();
  },

  _hasBookmarksObserver: false,
  uninit: function BUI_uninit() {
    this._uninitView();

    if (this._hasBookmarksObserver) {
      PlacesUtils.removeLazyBookmarkObserver(this);
    }

    if (this._pendingStmt) {
      this._pendingStmt.cancel();
      delete this._pendingStmt;
    }
  },

  onLocationChange: function BUI_onLocationChange() {
    if (this._uri && gBrowser.currentURI.equals(this._uri)) {
      return;
    }
    this.updateStarState();
  },

  updateStarState: function BUI_updateStarState() {
    // Reset tracked values.
    this._uri = gBrowser.currentURI;
    this._itemIds = [];

    if (this._pendingStmt) {
      this._pendingStmt.cancel();
      delete this._pendingStmt;
    }

    // We can load about:blank before the actual page, but there is no point in handling that page.
    if (isBlankPageURL(this._uri.spec)) {
      return;
    }

    this._pendingStmt = PlacesUtils.asyncGetBookmarkIds(this._uri, (aItemIds, aURI) => {
      // Safety check that the bookmarked URI equals the tracked one.
      if (!aURI.equals(this._uri)) {
        Components.utils.reportError("BookmarkingUI did not receive current URI");
        return;
      }

      // It's possible that onItemAdded gets called before the async statement
      // calls back.  For such an edge case, retain all unique entries from both
      // arrays.
      this._itemIds = this._itemIds.filter(
        function (id) aItemIds.indexOf(id) == -1
      ).concat(aItemIds);

      this._updateStar();

      // Start observing bookmarks if needed.
      if (!this._hasBookmarksObserver) {
        try {
          PlacesUtils.addLazyBookmarkObserver(this);
          this._hasBookmarksObserver = true;
        } catch(ex) {
          Components.utils.reportError("BookmarkingUI failed adding a bookmarks observer: " + ex);
        }
      }

      delete this._pendingStmt;
    }, this);
  },

  _updateStar: function BUI__updateStar() {
    if (!this.star) {
      return;
    }

    if (this._itemIds.length > 0) {
      this.star.setAttribute("starred", "true");
      this.star.setAttribute("tooltiptext", this._starredTooltip);
    }
    else {
      this.star.removeAttribute("starred");
      this.star.setAttribute("tooltiptext", this._unstarredTooltip);
    }
  },

  onCommand: function BUI_onCommand(aEvent) {
    if (aEvent.target != aEvent.currentTarget) {
      return;
    }
    // Ignore clicks on the star if we are updating its state.
    if (!this._pendingStmt) {
      PlacesCommandHook.bookmarkCurrentPage(this._itemIds.length > 0);
    }
  },

  // nsINavBookmarkObserver
  onItemAdded: function BUI_onItemAdded(aItemId, aParentId, aIndex, aItemType,
                                        aURI) {
    if (aURI && aURI.equals(this._uri)) {
      // If a new bookmark has been added to the tracked uri, register it.
      if (this._itemIds.indexOf(aItemId) == -1) {
        this._itemIds.push(aItemId);
        this._updateStar();
      }
    }
  },

  onItemRemoved: function BUI_onItemRemoved(aItemId) {
    let index = this._itemIds.indexOf(aItemId);
    // If one of the tracked bookmarks has been removed, unregister it.
    if (index != -1) {
      this._itemIds.splice(index, 1);
      this._updateStar();
    }
  },

  onItemChanged: function BUI_onItemChanged(aItemId, aProperty,
                                            aIsAnnotationProperty, aNewValue) {
    if (aProperty == "uri") {
      let index = this._itemIds.indexOf(aItemId);
      // If the changed bookmark was tracked, check if it is now pointing to
      // a different uri and unregister it.
      if (index != -1 && aNewValue != this._uri.spec) {
        this._itemIds.splice(index, 1);
        this._updateStar();
      }
      // If another bookmark is now pointing to the tracked uri, register it.
      else if (index == -1 && aNewValue == this._uri.spec) {
        this._itemIds.push(aItemId);
        this._updateStar();
      }
    }
  },

  onBeginUpdateBatch: function () {},
  onEndUpdateBatch: function () {},
  onBeforeItemRemoved: function () {},
  onItemVisited: function () {},
  onItemMoved: function () {},

  QueryInterface: XPCOMUtils.generateQI([
    Ci.nsINavBookmarkObserver
  ])
};