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
|
/* 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 file is loaded into the browser window scope.
/* eslint-env mozilla/browser-window */
/**
* Tab previews utility, produces thumbnails
*/
var tabPreviews = {
get aspectRatio() {
let { PageThumbUtils } = ChromeUtils.importESModule(
"resource://gre/modules/PageThumbUtils.sys.mjs"
);
let [width, height] = PageThumbUtils.getThumbnailSize(window);
delete this.aspectRatio;
return (this.aspectRatio = height / width);
},
/**
* Get the stored thumbnail URL for a given page URL and wait up to 1s for it
* to load. If the browser is discarded and there is no stored thumbnail, the
* image URL will fail to load and this method will return null after 1s.
* Callers should handle this case by doing nothing or using a fallback image.
* @param {String} uri The page URL.
* @returns {Promise<Image|null>}
*/
loadImage: async function tabPreviews_loadImage(uri) {
let img = new Image();
img.src = PageThumbs.getThumbnailURL(uri);
if (img.complete && img.naturalWidth) {
return img;
}
return new Promise(resolve => {
const controller = new AbortController();
img.addEventListener(
"load",
() => {
clearTimeout(timeout);
controller.abort();
resolve(img);
},
{ signal: controller.signal }
);
const timeout = setTimeout(() => {
controller.abort();
resolve(null);
}, 1000);
});
},
/**
* For a given tab, retrieve a preview thumbnail (a canvas or an image) from
* storage or capture a new one. If the tab's URL has changed since the
* previous call, the thumbnail will be regenerated.
* @param {MozTabbrowserTab} aTab The tab to get a preview for.
* @returns {Promise<HTMLCanvasElement|Image|null>} Resolves to...
* @resolves {HTMLCanvasElement} If a thumbnail can NOT be captured and stored
* for the tab, or if the tab is still loading, a snapshot is taken and
* returned as a canvas. It may be cached as a canvas (separately from
* thumbnail storage) in aTab.__thumbnail if the tab is finished loading. If
* the snapshot CAN be stored as a thumbnail, the snapshot is converted to a
* blob image and drawn in the returned canvas, but the image is added to
* thumbnail storage and cached in aTab.__thumbnail.
* @resolves {Image} A cached blob image from a previous thumbnail capture.
* e.g. <img src="moz-page-thumb://thumbnails/?url=foo.com&revision=bar">
* @resolves {null} If a thumbnail cannot be captured for any reason (e.g.
* because the tab is discarded) and there is no cached/stored thumbnail.
*/
get: async function tabPreviews_get(aTab) {
let browser = aTab.linkedBrowser;
let uri = browser.currentURI.spec;
// Invalidate the cached thumbnail since the tab has changed.
if (aTab.__thumbnail_lastURI && aTab.__thumbnail_lastURI != uri) {
aTab.__thumbnail = null;
aTab.__thumbnail_lastURI = null;
}
// A cached thumbnail (not from thumbnail storage) is available.
if (aTab.__thumbnail) {
return aTab.__thumbnail;
}
// This means the browser is discarded. Try to load a stored thumbnail, and
// use a fallback style otherwise.
if (!browser.browsingContext) {
return this.loadImage(uri);
}
// Don't cache or store the thumbnail if the tab is still loading.
return this.capture(aTab, !aTab.hasAttribute("busy"));
},
/**
* For a given tab, capture a preview thumbnail (a canvas), optionally cache
* it in aTab.__thumbnail, and possibly store it in thumbnail storage.
* @param {MozTabbrowserTab} aTab The tab to capture a preview for.
* @param {Boolean} aShouldCache Cache/store the captured thumbnail?
* @returns {Promise<HTMLCanvasElement|null>} Resolves to...
* @resolves {HTMLCanvasElement} A snapshot of the tab's content. If the
* snapshot is safe for storage and aShouldCache is true, the snapshot is
* converted to a blob image, stored and cached, and drawn in the returned
* canvas. The thumbnail can then be recovered even if the browser is
* discarded. Otherwise, the canvas itself is cached in aTab.__thumbnail.
* @resolves {null} If a fatal exception occurred during thumbnail capture.
*/
capture: async function tabPreviews_capture(aTab, aShouldCache) {
let browser = aTab.linkedBrowser;
let uri = browser.currentURI.spec;
let canvas = PageThumbs.createCanvas(window);
const doStore = await PageThumbs.shouldStoreThumbnail(browser);
if (doStore && aShouldCache) {
await PageThumbs.captureAndStore(browser);
let img = await this.loadImage(uri);
if (img) {
// Cache the stored blob image for future use.
aTab.__thumbnail = img;
aTab.__thumbnail_lastURI = uri;
// Draw the stored blob image in the canvas.
canvas.getContext("2d").drawImage(img, 0, 0);
} else {
canvas = null;
}
} else {
try {
await PageThumbs.captureToCanvas(browser, canvas);
if (aShouldCache) {
// Cache the canvas itself for future use.
aTab.__thumbnail = canvas;
aTab.__thumbnail_lastURI = uri;
}
} catch (error) {
console.error(error);
canvas = null;
}
}
return canvas;
},
};
var tabPreviewPanelHelper = {
opening(host) {
host.panel.hidden = false;
var handler = this._generateHandler(host);
host.panel.addEventListener("popupshown", handler);
host.panel.addEventListener("popuphiding", handler);
host._prevFocus = document.commandDispatcher.focusedElement;
},
_generateHandler(host) {
var self = this;
return function listener(event) {
if (event.target == host.panel) {
host.panel.removeEventListener(event.type, listener);
self["_" + event.type](host);
}
};
},
_popupshown(host) {
if ("setupGUI" in host) {
host.setupGUI();
}
},
_popuphiding(host) {
if ("suspendGUI" in host) {
host.suspendGUI();
}
if (host._prevFocus) {
Services.focus.setFocus(
host._prevFocus,
Ci.nsIFocusManager.FLAG_NOSCROLL
);
host._prevFocus = null;
} else {
gBrowser.selectedBrowser.focus();
}
if (host.tabToSelect) {
gBrowser.selectedTab = host.tabToSelect;
host.tabToSelect = null;
}
},
};
/**
* Ctrl-Tab panel
*/
var ctrlTab = {
maxTabPreviews: 7,
get panel() {
delete this.panel;
return (this.panel = document.getElementById("ctrlTab-panel"));
},
get showAllButton() {
delete this.showAllButton;
this.showAllButton = document.createXULElement("button");
this.showAllButton.id = "ctrlTab-showAll";
this.showAllButton.addEventListener("mouseover", this);
this.showAllButton.addEventListener("command", this);
this.showAllButton.addEventListener("click", this);
document
.getElementById("ctrlTab-showAll-container")
.appendChild(this.showAllButton);
return this.showAllButton;
},
get previews() {
delete this.previews;
this.previews = [];
let previewsContainer = document.getElementById("ctrlTab-previews");
for (let i = 0; i < this.maxTabPreviews; i++) {
let preview = this._makePreview();
previewsContainer.appendChild(preview);
this.previews.push(preview);
}
this.previews.push(this.showAllButton);
return this.previews;
},
get keys() {
var keys = {};
["close", "find", "selectAll"].forEach(function (key) {
keys[key] = document
.getElementById("key_" + key)
.getAttribute("key")
.toLocaleLowerCase()
.charCodeAt(0);
});
delete this.keys;
return (this.keys = keys);
},
_selectedIndex: 0,
get selected() {
return this._selectedIndex < 0
? document.activeElement
: this.previews[this._selectedIndex];
},
get isOpen() {
return (
this.panel.state == "open" || this.panel.state == "showing" || this._timer
);
},
get tabCount() {
return this.tabList.length;
},
get tabPreviewCount() {
return Math.min(this.maxTabPreviews, this.tabCount);
},
get tabList() {
return this._recentlyUsedTabs;
},
init: function ctrlTab_init() {
if (!this._recentlyUsedTabs) {
this._initRecentlyUsedTabs();
this._init(true);
}
},
uninit: function ctrlTab_uninit() {
if (this._recentlyUsedTabs) {
this._recentlyUsedTabs = null;
this._init(false);
}
},
prefName: "browser.ctrlTab.sortByRecentlyUsed",
readPref: function ctrlTab_readPref() {
var enable =
Services.prefs.getBoolPref(this.prefName) &&
!Services.prefs.getBoolPref(
"browser.ctrlTab.disallowForScreenReaders",
false
);
if (enable) {
this.init();
} else {
this.uninit();
}
},
observe(aSubject, aTopic, aPrefName) {
this.readPref();
},
_makePreview() {
let preview = document.createXULElement("button");
preview.className = "ctrlTab-preview";
preview.setAttribute("pack", "center");
preview.setAttribute("flex", "1");
preview.addEventListener("mouseover", this);
preview.addEventListener("command", this);
preview.addEventListener("click", this);
let previewInner = document.createXULElement("vbox");
previewInner.className = "ctrlTab-preview-inner";
preview.appendChild(previewInner);
let canvas = (preview._canvas = document.createXULElement("hbox"));
canvas.className = "ctrlTab-canvas";
previewInner.appendChild(canvas);
let faviconContainer = document.createXULElement("hbox");
faviconContainer.className = "ctrlTab-favicon-container";
previewInner.appendChild(faviconContainer);
let favicon = (preview._favicon = document.createXULElement("image"));
favicon.className = "ctrlTab-favicon";
faviconContainer.appendChild(favicon);
let label = (preview._label = document.createXULElement("label"));
label.className = "ctrlTab-label plain";
label.setAttribute("crop", "end");
previewInner.appendChild(label);
return preview;
},
updatePreviews: function ctrlTab_updatePreviews() {
for (let i = 0; i < this.previews.length; i++) {
this.updatePreview(this.previews[i], this.tabList[i]);
}
document.l10n.setAttributes(
this.showAllButton,
"tabbrowser-ctrl-tab-list-all-tabs",
{ tabCount: this.tabCount }
);
this.showAllButton.hidden = !gTabsPanel.canOpen;
},
updatePreview: function ctrlTab_updatePreview(aPreview, aTab) {
if (aPreview == this.showAllButton) {
return;
}
aPreview._tab = aTab;
if (aTab) {
let canvas = aPreview._canvas;
let canvasWidth = this.canvasWidth;
let canvasHeight = this.canvasHeight;
canvas.setAttribute("width", canvasWidth);
canvas.style.minWidth = canvasWidth + "px";
canvas.style.maxWidth = canvasWidth + "px";
canvas.style.minHeight = canvasHeight + "px";
canvas.style.maxHeight = canvasHeight + "px";
tabPreviews
.get(aTab)
.then(img => {
switch (aPreview._tab) {
case aTab:
this._clearCanvas(canvas);
if (img) {
canvas.appendChild(img);
}
break;
case null:
// The preview panel is not open, so don't render anything.
this._clearCanvas(canvas);
break;
// If the tab exists but it has changed since updatePreview was
// called, the preview will likely be handled by a later
// updatePreview call, e.g. on TabAttrModified.
}
})
.catch(error => console.error(error));
aPreview._label.setAttribute("value", aTab.label);
aPreview.setAttribute("tooltiptext", aTab.label);
if (aTab.image) {
aPreview._favicon.setAttribute("src", aTab.image);
} else {
aPreview._favicon.removeAttribute("src");
}
aPreview.hidden = false;
} else {
this._clearCanvas(aPreview._canvas);
aPreview.hidden = true;
aPreview._label.removeAttribute("value");
aPreview.removeAttribute("tooltiptext");
aPreview._favicon.removeAttribute("src");
}
},
// Remove previous preview images from the canvas box.
_clearCanvas(canvas) {
while (canvas.firstElementChild) {
canvas.firstElementChild.remove();
}
},
advanceFocus: function ctrlTab_advanceFocus(aForward) {
let selectedIndex = this.previews.indexOf(this.selected);
do {
selectedIndex += aForward ? 1 : -1;
if (selectedIndex < 0) {
selectedIndex = this.previews.length - 1;
} else if (selectedIndex >= this.previews.length) {
selectedIndex = 0;
}
} while (this.previews[selectedIndex].hidden);
if (this._selectedIndex == -1) {
// Focus is already in the panel.
this.previews[selectedIndex].focus();
} else {
this._selectedIndex = selectedIndex;
}
if (this.previews[selectedIndex]._tab) {
gBrowser.warmupTab(this.previews[selectedIndex]._tab);
}
if (this._timer) {
clearTimeout(this._timer);
this._timer = null;
this._openPanel();
}
},
_mouseOverFocus: function ctrlTab_mouseOverFocus(aPreview) {
if (this._trackMouseOver) {
aPreview.focus();
}
},
pick: function ctrlTab_pick(aPreview) {
if (!this.tabCount) {
return;
}
var select = aPreview || this.selected;
if (select == this.showAllButton) {
this.showAllTabs("ctrltab-all-tabs-button");
} else {
this.close(select._tab);
}
},
showAllTabs: function ctrlTab_showAllTabs(aEntrypoint = "unknown") {
this.close();
gTabsPanel.showAllTabsPanel(null, aEntrypoint);
},
remove: function ctrlTab_remove(aPreview) {
if (aPreview._tab) {
gBrowser.removeTab(aPreview._tab);
}
},
attachTab: function ctrlTab_attachTab(aTab, aPos) {
// If the tab is hidden, don't add it to the list unless it's selected
// (Normally hidden tabs would be unhidden when selected, but that doesn't
// happen for Firefox View).
if (aTab.closing || (aTab.hidden && !aTab.selected)) {
return;
}
// If the tab is already in the list, remove it before re-inserting it.
this.detachTab(aTab);
if (aPos == 0) {
this._recentlyUsedTabs.unshift(aTab);
} else if (aPos) {
this._recentlyUsedTabs.splice(aPos, 0, aTab);
} else {
this._recentlyUsedTabs.push(aTab);
}
},
detachTab: function ctrlTab_detachTab(aTab) {
var i = this._recentlyUsedTabs.indexOf(aTab);
if (i >= 0) {
this._recentlyUsedTabs.splice(i, 1);
}
},
open: function ctrlTab_open() {
if (this.isOpen) {
return;
}
this.canvasWidth = Math.ceil(
(screen.availWidth * 0.85) / this.maxTabPreviews
);
this.canvasHeight = Math.round(this.canvasWidth * tabPreviews.aspectRatio);
this.updatePreviews();
this._selectedIndex = 1;
gBrowser.warmupTab(this.selected._tab);
// Add a slight delay before showing the UI, so that a quick
// "ctrl-tab" keypress just flips back to the MRU tab.
this._timer = setTimeout(() => {
this._timer = null;
this._openPanel();
}, 200);
},
_openPanel: function ctrlTab_openPanel() {
tabPreviewPanelHelper.opening(this);
let width = Math.min(
screen.availWidth * 0.99,
this.canvasWidth * 1.25 * this.tabPreviewCount
);
this.panel.style.width = width + "px";
var estimateHeight = this.canvasHeight * 1.25 + 75;
this.panel.openPopupAtScreen(
screen.availLeft + (screen.availWidth - width) / 2,
screen.availTop + (screen.availHeight - estimateHeight) / 2,
false
);
},
close: function ctrlTab_close(aTabToSelect) {
if (!this.isOpen) {
return;
}
if (this._timer) {
clearTimeout(this._timer);
this._timer = null;
this.suspendGUI();
if (aTabToSelect) {
gBrowser.selectedTab = aTabToSelect;
}
return;
}
this.tabToSelect = aTabToSelect;
this.panel.hidePopup();
},
setupGUI: function ctrlTab_setupGUI() {
this.selected.focus();
this._selectedIndex = -1;
// Track mouse movement after a brief delay so that the item that happens
// to be under the mouse pointer initially won't be selected unintentionally.
this._trackMouseOver = false;
setTimeout(
function (self) {
if (self.isOpen) {
self._trackMouseOver = true;
}
},
0,
this
);
},
suspendGUI: function ctrlTab_suspendGUI() {
for (let preview of this.previews) {
this.updatePreview(preview, null);
}
},
onKeyDown(event) {
let action = ShortcutUtils.getSystemActionForEvent(event);
if (action != ShortcutUtils.CYCLE_TABS) {
return;
}
event.preventDefault();
event.stopPropagation();
if (this.isOpen) {
this.advanceFocus(!event.shiftKey);
return;
}
if (event.shiftKey) {
this.showAllTabs("shift-tab");
return;
}
document.addEventListener("keyup", this, { mozSystemGroup: true });
let tabs = gBrowser.visibleTabs;
if (tabs.length > 2) {
this.open();
} else if (tabs.length == 2) {
let index = tabs[0].selected ? 1 : 0;
gBrowser.selectedTab = tabs[index];
}
},
onKeyPress(event) {
if (!this.isOpen || !event.ctrlKey) {
return;
}
event.preventDefault();
event.stopPropagation();
if (event.keyCode == event.DOM_VK_DELETE) {
this.remove(this.selected);
return;
}
switch (event.charCode) {
case this.keys.close:
this.remove(this.selected);
break;
case this.keys.find:
this.showAllTabs("ctrltab-key-find");
break;
case this.keys.selectAll:
this.showAllTabs("ctrltab-key-selectAll");
break;
}
},
removeClosingTabFromUI: function ctrlTab_removeClosingTabFromUI(aTab) {
if (this.tabCount == 2) {
this.close();
return;
}
this.updatePreviews();
if (this.selected.hidden) {
this.advanceFocus(false);
}
if (this.selected == this.showAllButton) {
this.advanceFocus(false);
}
// If the current tab is removed, another tab can steal our focus.
if (aTab.selected && this.panel.state == "open") {
setTimeout(
function (selected) {
selected.focus();
},
0,
this.selected
);
}
},
handleEvent: function ctrlTab_handleEvent(event) {
switch (event.type) {
case "SSWindowRestored":
this._initRecentlyUsedTabs();
break;
case "TabAttrModified":
// tab attribute modified (i.e. label, busy, image)
// update preview only if tab attribute modified in the list
if (
event.detail.changed.some((elem, ind, arr) =>
["label", "busy", "image"].includes(elem)
)
) {
for (let i = this.previews.length - 1; i >= 0; i--) {
if (
this.previews[i]._tab &&
this.previews[i]._tab == event.target
) {
this.updatePreview(this.previews[i], event.target);
break;
}
}
}
break;
case "TabSelect":
this.attachTab(event.target, 0);
// If the previous tab was hidden (e.g. Firefox View), remove it from
// the list when it's deselected.
let previousTab = event.detail.previousTab;
if (previousTab.hidden) {
this.detachTab(previousTab);
}
break;
case "TabOpen":
this.attachTab(event.target, 1);
break;
case "TabClose":
this.detachTab(event.target);
if (this.isOpen) {
this.removeClosingTabFromUI(event.target);
}
break;
case "TabHide":
this.detachTab(event.target);
break;
case "TabShow":
this.attachTab(event.target);
this._sortRecentlyUsedTabs();
break;
case "keydown":
this.onKeyDown(event);
break;
case "keypress":
this.onKeyPress(event);
break;
case "keyup":
// During cycling tabs, we avoid sending keyup event to content document.
event.preventDefault();
event.stopPropagation();
if (event.keyCode === event.DOM_VK_CONTROL) {
document.removeEventListener("keyup", this, { mozSystemGroup: true });
if (this.isOpen) {
this.pick();
}
}
break;
case "popupshowing":
if (event.target.id == "menu_viewPopup") {
document.getElementById("menu_showAllTabs").hidden =
!gTabsPanel.canOpen;
}
break;
case "mouseover":
this._mouseOverFocus(event.currentTarget);
break;
case "command":
this.pick(event.currentTarget);
break;
case "click":
if (event.button == 1) {
this.remove(event.currentTarget);
} else if (AppConstants.platform == "macosx" && event.button == 2) {
// Control+click is a right click on macOS, but in this case we want
// to handle it like a left click.
this.pick(event.currentTarget);
}
break;
}
},
filterForThumbnailExpiration(aCallback) {
// Save a few more thumbnails than we actually display, so that when tabs
// are closed, the previews we add instead still get thumbnails.
const extraThumbnails = 3;
const thumbnailCount = Math.min(
this.tabPreviewCount + extraThumbnails,
this.tabCount
);
let urls = [];
for (let i = 0; i < thumbnailCount; i++) {
urls.push(this.tabList[i].linkedBrowser.currentURI.spec);
}
aCallback(urls);
},
_sortRecentlyUsedTabs() {
this._recentlyUsedTabs.sort(
(tab1, tab2) => tab2.lastAccessed - tab1.lastAccessed
);
},
_initRecentlyUsedTabs() {
this._recentlyUsedTabs = Array.prototype.filter.call(
gBrowser.tabs,
tab => !tab.closing && !tab.hidden
);
this._sortRecentlyUsedTabs();
},
_init: function ctrlTab__init(enable) {
var toggleEventListener = enable
? "addEventListener"
: "removeEventListener";
window[toggleEventListener]("SSWindowRestored", this);
var tabContainer = gBrowser.tabContainer;
tabContainer[toggleEventListener]("TabOpen", this);
tabContainer[toggleEventListener]("TabAttrModified", this);
tabContainer[toggleEventListener]("TabSelect", this);
tabContainer[toggleEventListener]("TabClose", this);
tabContainer[toggleEventListener]("TabHide", this);
tabContainer[toggleEventListener]("TabShow", this);
if (enable) {
document.addEventListener("keydown", this, { mozSystemGroup: true });
} else {
document.removeEventListener("keydown", this, { mozSystemGroup: true });
}
document[toggleEventListener]("keypress", this);
gBrowser.tabbox.handleCtrlTab = !enable;
if (enable) {
PageThumbs.addExpirationFilter(this);
} else {
PageThumbs.removeExpirationFilter(this);
}
// If we're not running, hide the "Show All Tabs" menu item,
// as Shift+Ctrl+Tab will be handled by the tab bar.
document.getElementById("menu_showAllTabs").hidden = !enable;
document
.getElementById("menu_viewPopup")
[toggleEventListener]("popupshowing", this);
},
};
|