File: browser_navigator.cc

package info (click to toggle)
chromium 139.0.7258.127-1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 6,122,068 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (1018 lines) | stat: -rw-r--r-- 43,220 bytes parent folder | download | duplicates (3)
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
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/ui/browser_navigator.h"

#include <algorithm>
#include <memory>
#include <optional>
#include <string>
#include <string_view>
#include <utility>

#include "base/memory/raw_ptr.h"
#include "base/notimplemented.h"
#include "base/notreached.h"
#include "base/strings/utf_string_conversions.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "chrome/browser/apps/app_service/web_contents_app_id_utils.h"
#include "chrome/browser/apps/link_capturing/link_capturing_tab_data.h"
#include "chrome/browser/browser_about_handler.h"
#include "chrome/browser/picture_in_picture/picture_in_picture_window_manager.h"
#include "chrome/browser/platform_util.h"
#include "chrome/browser/prefs/incognito_mode_prefs.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/renderer_host/chrome_navigation_ui_data.h"
#include "chrome/browser/signin/signin_promo.h"
#include "chrome/browser/tab_contents/tab_util.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_navigator_params.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/location_bar/location_bar.h"
#include "chrome/browser/ui/singleton_tabs.h"
#include "chrome/browser/ui/status_bubble.h"
#include "chrome/browser/ui/tab_helpers.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/tabs/tab_strip_user_gesture_details.h"
#include "chrome/browser/ui/web_applications/app_browser_controller.h"
#include "chrome/browser/ui/web_applications/web_app_tabbed_utils.h"
#include "chrome/browser/web_applications/web_app_helpers.h"
#include "chrome/browser/web_applications/web_app_tab_helper.h"
#include "chrome/common/url_constants.h"
#include "components/captive_portal/core/buildflags.h"
#include "components/constrained_window/constrained_window_views.h"
#include "components/no_state_prefetch/browser/no_state_prefetch_manager.h"
#include "components/password_manager/content/common/web_ui_constants.h"
#include "components/policy/core/common/policy_pref_names.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/browser_url_handler.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/picture_in_picture_window_controller.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/site_isolation_policy.h"
#include "content/public/browser/web_contents.h"
#include "extensions/buildflags/buildflags.h"
#include "ui/base/window_open_disposition.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "url/url_constants.h"

#if !BUILDFLAG(IS_ANDROID)
#include "chrome/browser/ui/web_applications/navigation_capturing_process.h"
#include "chrome/browser/ui/web_applications/web_app_launch_utils.h"
#endif  // !BUILDFLAG(IS_ANDROID)

#if BUILDFLAG(IS_CHROMEOS)
#include "ash/public/cpp/multi_user_window_manager.h"
#include "chrome/browser/ui/ash/multi_user/multi_user_window_manager_helper.h"
#include "chrome/browser/ui/ash/system_web_apps/system_web_app_ui_utils.h"
#include "components/account_id/account_id.h"
#endif

#if defined(USE_AURA)
#include "ui/aura/window.h"
#endif

#if BUILDFLAG(ENABLE_CAPTIVE_PORTAL_DETECTION)
#include "components/captive_portal/content/captive_portal_tab_helper.h"
#endif

using content::GlobalRequestID;
using content::NavigationController;
using content::WebContents;
using WebExposedIsolationLevel = content::WebExposedIsolationLevel;

namespace {

// Returns true if |params.browser| exists and can open a new tab for
// |params.url|. Not all browsers support multiple tabs, such as app frames and
// popups. TYPE_APP will open a new tab if the browser was launched from a
// template, otherwise only if the URL is within the app scope.
bool WindowCanOpenTabs(const NavigateParams& params) {
  if (!params.browser) {
    return false;
  }

  // If the browser is created from a template, we do not need to check if the
  // url is in the app scope since we know it was saved directly from the app.
  if (params.browser->creation_source() !=
          Browser::CreationSource::kDeskTemplate &&
      params.browser->app_controller() &&
      !params.browser->app_controller()->IsUrlInAppScope(params.url)) {
    return false;
  }

  return params.browser->CanSupportWindowFeature(Browser::FEATURE_TABSTRIP) ||
         params.browser->tab_strip_model()->empty();
}

// Finds an existing Browser compatible with |profile|, making a new one if no
// such Browser is located.
Browser* GetOrCreateBrowser(Profile* profile, bool user_gesture) {
  Browser* browser = chrome::FindTabbedBrowser(profile, false);

  if (!browser && Browser::GetCreationStatusForProfile(profile) ==
                      Browser::CreationStatus::kOk) {
    browser = Browser::Create(Browser::CreateParams(profile, user_gesture));
  }
  return browser;
}

bool IncognitoModeForced(const Profile* profile) {
  return IncognitoModePrefs::GetAvailability(profile->GetPrefs()) ==
         policy::IncognitoModeAvailability::kForced;
}

// Change some of the navigation parameters based on the particular URL.
// Returns true on success. Otherwise, if changing params leads the browser
// into an erroneous state, returns false.
bool AdjustNavigateParamsForURL(NavigateParams* params) {
  // Check for some chrome:// pages which we always want to open in a
  // non-incognito window. Note that even though a ChromeOS guest session is
  // technically an incognito window, these URLs are allowed.
  Profile* profile = params->initiating_profile;
  if (!params->contents_to_insert && !params->switch_to_singleton_tab &&
      !IsURLAllowedInIncognito(params->url) && !profile->IsGuestSession() &&
      (profile->IsOffTheRecord() ||
       params->disposition == WindowOpenDisposition::OFF_THE_RECORD)) {
    profile = profile->GetOriginalProfile();

    // If incognito is forced, we punt.
    if (IncognitoModeForced(profile)) {
      return false;
    }
    params->disposition = WindowOpenDisposition::SINGLETON_TAB;
    params->browser = GetOrCreateBrowser(profile, params->user_gesture);
    params->window_action = NavigateParams::SHOW_WINDOW;
  }

  // Clicking a link to the home tab in a tabbed web app should always open the
  // link in the home tab.
  if (web_app::IsHomeTabUrl(params->browser, params->url)) {
    params->browser->tab_strip_model()->ActivateTabAt(0);
    // If the navigation URL is the same as the current home tab URL, skip the
    // navigation.
    if (params->browser->tab_strip_model()
            ->GetActiveWebContents()
            ->GetLastCommittedURL() == params->url) {
      return false;
    }
    params->disposition = WindowOpenDisposition::CURRENT_TAB;
  }

  return true;
}

Browser::ValueSpecified GetOriginSpecified(const NavigateParams& params) {
  return params.window_features.has_x && params.window_features.has_y
             ? Browser::ValueSpecified::kSpecified
             : Browser::ValueSpecified::kUnspecified;
}

// Returns a Browser and tab index. The browser can host the navigation or
// tab addition specified in |params|.  This might just return the same
// Browser specified in |params|, or some other if that Browser is deemed
// incompatible. The tab index will be -1 unless a singleton or tab switch
// was requested, in which case it might be the target tab index, or -1
// if not found.
std::tuple<Browser*, int> GetBrowserAndTabForDisposition(
    const NavigateParams& params) {
  Profile* profile = params.initiating_profile;

  switch (params.disposition) {
    case WindowOpenDisposition::SWITCH_TO_TAB:
#if !BUILDFLAG(IS_ANDROID)
    {
      std::pair<Browser*, int> browser_and_index =
          GetIndexAndBrowserOfExistingTab(profile, params);
      if (browser_and_index.first) {
        return browser_and_index;
      }
    }
#endif
      [[fallthrough]];
    case WindowOpenDisposition::CURRENT_TAB:
      if (params.browser) {
        return {params.browser, -1};
      }
      // Find a compatible window and re-execute this command in it. Otherwise
      // re-run with NEW_WINDOW.
      return {GetOrCreateBrowser(profile, params.user_gesture), -1};
    case WindowOpenDisposition::SINGLETON_TAB: {
      // If we have a browser window, check it first.
      if (params.browser) {
        int index = GetIndexOfExistingTab(params.browser, params);
        if (index >= 0) {
          return {params.browser, index};
        }
      }
      // If we don't have a a window, or if this window can't open tabs, then
      // it would load in a random window, potentially opening a second copy.
      // Instead, make an extra effort to see if there's an already open copy.
      if (!WindowCanOpenTabs(params)) {
        std::pair<Browser*, int> browser_and_index =
            GetIndexAndBrowserOfExistingTab(profile, params);
        if (browser_and_index.first) {
          return browser_and_index;
        }
      }
    }
      [[fallthrough]];
    case WindowOpenDisposition::NEW_FOREGROUND_TAB:
    case WindowOpenDisposition::NEW_BACKGROUND_TAB:
      // See if we can open the tab in the window this navigator is bound to.
      if (WindowCanOpenTabs(params)) {
        return {params.browser, -1};
      }

      // Find a compatible window and re-execute this command in it. Otherwise
      // re-run with NEW_WINDOW.
      return {GetOrCreateBrowser(profile, params.user_gesture), -1};
    case WindowOpenDisposition::NEW_PICTURE_IN_PICTURE:
#if !BUILDFLAG(IS_ANDROID)
    {
      // The picture in picture window should be part of the opener's web app,
      // if any.
      std::string app_name;
      if (!params.app_id.empty()) {
        app_name = web_app::GenerateApplicationNameFromAppId(params.app_id);
      } else if (params.browser && !params.browser->app_name().empty()) {
        app_name = params.browser->app_name();
      }

      auto browser_params = Browser::CreateParams::CreateForPictureInPicture(
          app_name, params.trusted_source, profile, params.user_gesture);
      DCHECK(params.contents_to_insert);
      auto pip_options =
          params.contents_to_insert->GetPictureInPictureOptions();
      if (!pip_options.has_value()) {
        return {nullptr, -1};
      }

      browser_params.pip_options = pip_options;

      const BrowserWindow* const browser_window = params.browser->window();
      const gfx::NativeWindow native_window =
          browser_window ? browser_window->GetNativeWindow()
                         : gfx::NativeWindow();
      const display::Screen* const screen = display::Screen::GetScreen();
      const display::Display display =
          browser_window ? screen->GetDisplayNearestWindow(native_window)
                         : screen->GetDisplayForNewWindows();

      browser_params.initial_bounds =
          PictureInPictureWindowManager::GetInstance()
              ->CalculateInitialPictureInPictureWindowBounds(*pip_options,
                                                             display);

      browser_params.omit_from_session_restore = true;
      return {Browser::Create(browser_params), -1};
    }
#else   // !IS_ANDROID
      // For TYPE_PICTURE_IN_PICTURE
      NOTIMPLEMENTED_LOG_ONCE();
      return {nullptr, -1};
#endif  // !IS_ANDROID

    case WindowOpenDisposition::NEW_POPUP: {
      // Make a new popup window.
      // Coerce app-style if |source| represents an app.
      std::string app_name;
      if (!params.app_id.empty()) {
        app_name = web_app::GenerateApplicationNameFromAppId(params.app_id);
      } else if (params.browser && !params.browser->app_name().empty()) {
        app_name = params.browser->app_name();
      }
      if (Browser::GetCreationStatusForProfile(profile) !=
          Browser::CreationStatus::kOk) {
        return {nullptr, -1};
      }
      if (app_name.empty()) {
        Browser::CreateParams browser_params(Browser::TYPE_POPUP, profile,
                                             params.user_gesture);
        browser_params.trusted_source = params.trusted_source;
        browser_params.initial_bounds = params.window_features.bounds;
        browser_params.initial_origin_specified = GetOriginSpecified(params);
        browser_params.can_maximize = !params.is_tab_modal_popup_deprecated;
        browser_params.can_fullscreen = !params.is_tab_modal_popup_deprecated;
        return {Browser::Create(browser_params), -1};
      }
      Browser::CreateParams browser_params =
          Browser::CreateParams::CreateForAppPopup(
              app_name, params.trusted_source, params.window_features.bounds,
              profile, params.user_gesture);
      browser_params.initial_origin_specified = GetOriginSpecified(params);
      return {Browser::Create(browser_params), -1};
    }
    case WindowOpenDisposition::NEW_WINDOW: {
      // Make a new normal browser window.
      Browser* browser = nullptr;
      if (Browser::GetCreationStatusForProfile(profile) ==
          Browser::CreationStatus::kOk) {
        browser = Browser::Create(
            Browser::CreateParams(profile, params.user_gesture));
      }
      return {browser, -1};
    }
    case WindowOpenDisposition::OFF_THE_RECORD:
      // Make or find an incognito window.
      return {GetOrCreateBrowser(
                  profile->GetPrimaryOTRProfile(/*create_if_needed=*/true),
                  params.user_gesture),
              -1};
    // The following types result in no navigation.
    case WindowOpenDisposition::SAVE_TO_DISK:
    case WindowOpenDisposition::IGNORE_ACTION:
      return {nullptr, -1};
    default:
      NOTREACHED();
  }
}

// Fix disposition and other parameter values depending on prevailing
// conditions.
void NormalizeDisposition(NavigateParams* params) {
  // Calculate the WindowOpenDisposition if necessary.
  if (params->browser->tab_strip_model()->empty() &&
      (params->disposition == WindowOpenDisposition::NEW_BACKGROUND_TAB ||
       params->disposition == WindowOpenDisposition::CURRENT_TAB ||
       params->disposition == WindowOpenDisposition::SINGLETON_TAB)) {
    params->disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
  }
  if (params->browser->profile()->IsOffTheRecord() &&
      params->disposition == WindowOpenDisposition::OFF_THE_RECORD) {
    params->disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
  }
  if (!params->source_contents &&
      params->disposition == WindowOpenDisposition::CURRENT_TAB) {
    params->disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
  }

  switch (params->disposition) {
    case WindowOpenDisposition::NEW_BACKGROUND_TAB:
      // Disposition trumps add types. ADD_ACTIVE is a default, so we need to
      // remove it if disposition implies the tab is going to open in the
      // background.
      params->tabstrip_add_types &= ~AddTabTypes::ADD_ACTIVE;
      break;

    case WindowOpenDisposition::NEW_PICTURE_IN_PICTURE:
      PictureInPictureWindowManager::SetWindowParams(*params);
      break;

    case WindowOpenDisposition::NEW_WINDOW:
    case WindowOpenDisposition::NEW_POPUP: {
      // Code that wants to open a new window typically expects it to be shown
      // automatically.
      if (params->window_action == NavigateParams::NO_ACTION) {
        params->window_action = NavigateParams::SHOW_WINDOW;
      }
      [[fallthrough]];
    }
    case WindowOpenDisposition::NEW_FOREGROUND_TAB:
    case WindowOpenDisposition::SINGLETON_TAB:
      params->tabstrip_add_types |= AddTabTypes::ADD_ACTIVE;
      break;

    default:
      break;
  }
}

// Obtain the profile used by the code that originated the Navigate() request.
Profile* GetSourceProfile(NavigateParams* params) {
  // |source_site_instance| needs to be checked before |source_contents|. This
  // might matter when chrome.windows.create is used to open multiple URLs,
  // which would reuse |params| and modify |params->source_contents| across
  // navigations.
  if (params->source_site_instance) {
    return Profile::FromBrowserContext(
        params->source_site_instance->GetBrowserContext());
  }

  if (params->source_contents) {
    return Profile::FromBrowserContext(
        params->source_contents->GetBrowserContext());
  }

  return params->initiating_profile;
}

base::WeakPtr<content::NavigationHandle> LoadURLInContents(
    WebContents* target_contents,
    const GURL& url,
    NavigateParams* params) {
  NavigationController::LoadURLParams load_url_params(url);
  load_url_params.initiator_frame_token = params->initiator_frame_token;
  load_url_params.initiator_process_id = params->initiator_process_id;
  load_url_params.initiator_origin = params->initiator_origin;
  load_url_params.initiator_base_url = params->initiator_base_url;
  load_url_params.source_site_instance = params->source_site_instance;
  load_url_params.referrer = params->referrer;
  load_url_params.frame_name = params->frame_name;
  load_url_params.frame_tree_node_id = params->frame_tree_node_id;
  load_url_params.redirect_chain = params->redirect_chain;
  load_url_params.transition_type = params->transition;
  load_url_params.extra_headers = params->extra_headers;
  load_url_params.should_replace_current_entry =
      params->should_replace_current_entry;
  load_url_params.is_renderer_initiated = params->is_renderer_initiated;
  load_url_params.started_from_context_menu = params->started_from_context_menu;
  load_url_params.has_user_gesture = params->user_gesture;
  load_url_params.blob_url_loader_factory = params->blob_url_loader_factory;
  load_url_params.input_start = params->input_start;
  load_url_params.was_activated = params->was_activated;
  load_url_params.href_translate = params->href_translate;
  load_url_params.reload_type = params->reload_type;
  load_url_params.impression = params->impression;
  load_url_params.suggested_system_entropy = params->suggested_system_entropy;

  // |frame_tree_node_id| is invalid for main frame navigations.
  if (params->frame_tree_node_id.is_null()) {
    bool force_no_https_upgrade =
        params->url_typed_with_http_scheme ||
        params->captive_portal_window_type !=
            captive_portal::CaptivePortalWindowType::kNone;
    std::unique_ptr<ChromeNavigationUIData> navigation_ui_data =
        ChromeNavigationUIData::CreateForMainFrameNavigation(
            target_contents, params->is_using_https_as_default_scheme,
            force_no_https_upgrade);
    navigation_ui_data->set_navigation_initiated_from_sync(
        params->navigation_initiated_from_sync);
    load_url_params.navigation_ui_data = std::move(navigation_ui_data);
  }

  if (params->post_data) {
    load_url_params.load_type = NavigationController::LOAD_TYPE_HTTP_POST;
    load_url_params.post_data = params->post_data;
  }

  return target_contents->GetController().LoadURLWithParams(load_url_params);
}

// This class makes sure the Browser object held in |params| is made visible
// by the time it goes out of scope, provided |params| wants it to be shown.
class ScopedBrowserShower {
 public:
  explicit ScopedBrowserShower(NavigateParams* params,
                               content::WebContents** contents)
      : params_(params), contents_(contents) {}

  ScopedBrowserShower(const ScopedBrowserShower&) = delete;
  ScopedBrowserShower& operator=(const ScopedBrowserShower&) = delete;

  ~ScopedBrowserShower() {
    BrowserWindow* window = params_->browser->window();
    if (params_->window_action == NavigateParams::SHOW_WINDOW_INACTIVE) {
      // TODO(crbug.com/40284685): investigate if SHOW_WINDOW_INACTIVE needs to
      // be supported for tab modal popups.
      CHECK_EQ(params_->is_tab_modal_popup_deprecated, false);
      window->ShowInactive();
    } else if (params_->window_action == NavigateParams::SHOW_WINDOW) {
      if (params_->is_tab_modal_popup_deprecated) {
        CHECK_EQ(params_->disposition, WindowOpenDisposition::NEW_POPUP);
        CHECK_NE(source_contents_, nullptr);
        window->SetIsTabModalPopupDeprecated(true);
        constrained_window::ShowModalDialog(window->GetNativeWindow(),
                                            source_contents_);
      } else {
        window->Show();
      }
      // If a user gesture opened a popup window, focus the contents.
      if (params_->user_gesture &&
          (params_->disposition == WindowOpenDisposition::NEW_POPUP ||
           params_->disposition ==
               WindowOpenDisposition::NEW_PICTURE_IN_PICTURE) &&
          *contents_) {
        (*contents_)->Focus();
        window->Activate();
      }
    }
  }

  void set_source_contents(content::WebContents* source_contents) {
    source_contents_ = source_contents;
  }

 private:
  raw_ptr<NavigateParams> params_;
  raw_ptr<content::WebContents*> contents_;
  raw_ptr<content::WebContents> source_contents_;
};

std::unique_ptr<content::WebContents> CreateTargetContents(
    const NavigateParams& params,
    const GURL& url) {
  // Always create the new WebContents in a new SiteInstance (and therefore a
  // new BrowsingInstance), *unless* there's a |params.opener|.
  //
  // Note that the SiteInstance below is only for the "initial" placement of the
  // new WebContents (i.e. if subsequent navigation [including the initial
  // navigation] triggers a cross-process transfer, then the opener and new
  // contents can end up in separate processes).  This is fine, because even if
  // subsequent navigation is cross-process (i.e. cross-SiteInstance), then it
  // will stay in the same BrowsingInstance (creating frame proxies as needed)
  // preserving the requested opener relationship along the way.
  scoped_refptr<content::SiteInstance> initial_site_instance_for_new_contents =
      params.opener
          ? params.opener->GetSiteInstance()
          : tab_util::GetSiteInstanceForNewTab(params.browser->profile(), url);

  WebContents::CreateParams create_params(
      params.browser->profile(), initial_site_instance_for_new_contents);
  create_params.main_frame_name = params.frame_name;
  if (params.opener) {
    create_params.opener_render_frame_id = params.opener->GetRoutingID();
    create_params.opener_render_process_id =
        params.opener->GetProcess()->GetDeprecatedID();
  }

  create_params.opened_by_another_window = params.opened_by_another_window;

  if (params.disposition == WindowOpenDisposition::NEW_BACKGROUND_TAB) {
    create_params.initially_hidden = true;
  }

#if defined(USE_AURA)
  if (params.browser->window() && params.browser->window()->GetNativeWindow()) {
    create_params.context = params.browser->window()->GetNativeWindow();
  }
#endif

  return WebContents::Create(create_params);
}

bool IsHostAllowedInIncognito(const GURL& url) {
  std::string scheme = url.scheme();
  std::string_view host = url.host_piece();
  if (scheme != content::kChromeUIScheme) {
    return true;
  }

  if (host == chrome::kChromeUIChromeSigninHost) {
#if BUILDFLAG(IS_WIN)
    // Allow incognito mode for the chrome-signin url if we only want to
    // retrieve the login scope token without touching any profiles. This
    // option is only available on Windows for use with Google Credential
    // Provider for Windows.
    return signin::GetSigninReasonForEmbeddedPromoURL(url) ==
           signin_metrics::Reason::kFetchLstOnly;
#else
    return false;
#endif  // BUILDFLAG(IS_WIN)
  }

  // Most URLs are allowed in incognito; the following are exceptions.
  // chrome://extensions is on the list because it redirects to
  // chrome://settings.
  return host != chrome::kChromeUIAppLauncherPageHost &&
         host != chrome::kChromeUISettingsHost &&
#if BUILDFLAG(IS_CHROMEOS)
         host != chrome::kChromeUIOSSettingsHost &&
#endif
         host != chrome::kChromeUIHelpHost &&
         host != chrome::kChromeUIHistoryHost &&
         host != chrome::kChromeUIExtensionsHost &&
         host != password_manager::kChromeUIPasswordManagerHost;
}

}  // namespace

base::WeakPtr<content::NavigationHandle> Navigate(NavigateParams* params) {
  TRACE_EVENT1("navigation", "chrome::Navigate", "disposition",
               params->disposition);
  Browser* source_browser = params->browser;
  if (source_browser) {
    params->initiating_profile = source_browser->profile();
  }
  DCHECK(params->initiating_profile);

  // If the created window is a partitioned popin, a valid source exists, and
  // the disposition is NEW_POPUP then the resulting popup should be tab-modal.
  // See: https://explainers-by-googlers.github.io/partitioned-popins/
  params->is_tab_modal_popup_deprecated |=
      params->window_features.is_partitioned_popin && params->source_contents &&
      params->disposition == WindowOpenDisposition::NEW_POPUP;

#if BUILDFLAG(IS_CHROMEOS)
  if (params->initiating_profile->IsOffTheRecord() &&
      params->initiating_profile->GetOTRProfileID().IsCaptivePortal() &&
      params->disposition != WindowOpenDisposition::NEW_POPUP &&
      params->disposition != WindowOpenDisposition::CURRENT_TAB &&
      !IncognitoModeForced(params->initiating_profile)) {
    // Navigation outside of the current tab or the initial popup window from a
    // captive portal signin window should be prevented.
    params->disposition = WindowOpenDisposition::CURRENT_TAB;
  }
#endif

  if (params->initiating_profile->ShutdownStarted()) {
    // Don't navigate when the profile is shutting down.
    return nullptr;
  }

  // Block navigation requests when in locked fullscreen mode. We allow
  // navigation requests in the webapp when locked for OnTask (only relevant for
  // non-web browser scenarios).
  // TODO(b/365146870): Remove once we consolidate locked fullscreen with
  // OnTask.
  if (source_browser) {
    bool should_block_navigation =
        platform_util::IsBrowserLockedFullscreen(source_browser);
#if BUILDFLAG(IS_CHROMEOS)
    if (source_browser->IsLockedForOnTask()) {
      should_block_navigation = false;
    }
#endif  // BUILDFLAG(IS_CHROMEOS)
    if (should_block_navigation) {
      return nullptr;
    }
  }

  // Open System Apps in their standalone window if necessary.
  // TODO(crbug.com/40136163): Remove this code after we integrate with intent
  // handling.
#if BUILDFLAG(IS_CHROMEOS)
  const std::optional<ash::SystemWebAppType> capturing_system_app_type =
      ash::GetCapturingSystemAppForURL(params->initiating_profile, params->url);
  if (capturing_system_app_type &&
      (!params->browser ||
       !ash::IsBrowserForSystemWebApp(params->browser,
                                      capturing_system_app_type.value()))) {
    ash::SystemAppLaunchParams swa_params;
    swa_params.url = params->url;
    ash::LaunchSystemWebAppAsync(params->initiating_profile,
                                 capturing_system_app_type.value(), swa_params);

    // It's okay to early return here, because LaunchSystemWebAppAsync uses a
    // different logic to choose (and create if necessary) a browser window for
    // system apps.
    //
    // It's okay to skip the checks and cleanups below. The link captured system
    // app will either open in its own browser window, or navigate an existing
    // browser window exclusively used by this app. For the initiating browser,
    // the navigation should appear to be cancelled.
    return nullptr;
  }
#endif

  if (!AdjustNavigateParamsForURL(params)) {
    return nullptr;
  }

  // Picture-in-picture browser windows must have a source contents in order for
  // the window to function correctly. If we have no source contents to work
  // with (e.g. if an extension popup attempts to open a PiP window), we should
  // cancel the navigation.  The source URL must also be of a type that's
  // allowed to open document PiP.  See `PictureInPictureWindowManager` for
  // details on what's allowed.
  if (params->disposition == WindowOpenDisposition::NEW_PICTURE_IN_PICTURE) {
    const GURL& url = params->source_contents
                          ? params->source_contents->GetLastCommittedURL()
                          : GURL();
    if (!PictureInPictureWindowManager::IsSupportedForDocumentPictureInPicture(
            url)) {
      return nullptr;
    }
  }

  // If no source WebContents was specified, we use the selected one from the
  // target browser. This must happen before GetBrowserAndTabForDisposition()
  // has a chance to replace |params->browser| with another one, but after the
  // above check that relies on the original source_contents value.
  if (!params->source_contents && params->browser) {
    params->source_contents =
        params->browser->tab_strip_model()->GetActiveWebContents();
  }

  WebContents* contents_to_navigate_or_insert =
      params->contents_to_insert.get();
  if (params->switch_to_singleton_tab) {
    DCHECK_EQ(params->disposition, WindowOpenDisposition::SINGLETON_TAB);
    contents_to_navigate_or_insert = params->switch_to_singleton_tab;
  }

#if !BUILDFLAG(IS_ANDROID)
  // If this is a Picture in Picture window, then notify the pip manager about
  // it. This enables the opener and pip window to stay connected, so that (for
  // example), the pip window does not outlive the opener.
  //
  // We do this before creating the browser window, so that the browser can talk
  // to the PictureInPictureWindowManager.  Otherwise, the manager has no idea
  // that there's a pip window.
  if (params->disposition == WindowOpenDisposition::NEW_PICTURE_IN_PICTURE) {
    // Picture in picture windows may not be opened by other picture in
    // picture windows, or without an opener.
    if (!params->browser || params->browser->is_type_picture_in_picture()) {
      params->browser = nullptr;
      return nullptr;
    }

    PictureInPictureWindowManager::GetInstance()->EnterDocumentPictureInPicture(
        params->source_contents, contents_to_navigate_or_insert);
  }
#endif  // !BUILDFLAG(IS_ANDROID)

  // TODO(crbug.com/364657540): Revisit integration with web_application system
  // later if needed.
  int singleton_index;

#if !BUILDFLAG(IS_ANDROID)
  std::unique_ptr<web_app::NavigationCapturingProcess> app_navigation =
      web_app::NavigationCapturingProcess::MaybeHandleAppNavigation(*params);
  std::optional<std::tuple<Browser*, int>> app_browser_tab_override;
  if (app_navigation) {
    app_browser_tab_override =
        app_navigation->GetInitialBrowserAndTabOverrideForNavigation(*params);
  }
  std::tie(params->browser, singleton_index) =
      app_browser_tab_override.has_value()
          ? *app_browser_tab_override
          : GetBrowserAndTabForDisposition(*params);
#else  // !BUILDFLAG(IS_ANDROID)
  std::tie(params->browser, singleton_index) =
      GetBrowserAndTabForDisposition(*params);
#endif

  if (!params->browser) {
    return nullptr;
  }

  // Trying to open a background tab when in a non-tabbed app browser results in
  // focusing a regular browser window and opening a tab in the background
  // of that window. Change the disposition to NEW_FOREGROUND_TAB so that
  // the new tab is focused.
  if (source_browser && source_browser->is_type_app() &&
      params->disposition == WindowOpenDisposition::NEW_BACKGROUND_TAB &&
      !(source_browser->app_controller() &&
        source_browser->app_controller()->has_tab_strip())) {
    params->disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
  }

  if (singleton_index != -1) {
    contents_to_navigate_or_insert =
        params->browser->tab_strip_model()->GetWebContentsAt(singleton_index);
  } else if (params->disposition == WindowOpenDisposition::SWITCH_TO_TAB) {
    // The user is trying to open a tab that no longer exists. If we open a new
    // tab, it could leave orphaned NTPs around, but always overwriting the
    // current tab could could clobber state that the user was trying to
    // preserve. Fallback to the behavior used for singletons: overwrite the
    // current tab if it's the NTP, otherwise open a new tab.
    params->disposition = WindowOpenDisposition::SINGLETON_TAB;
    ShowSingletonTabOverwritingNTP(params);
    return nullptr;
  }
  if (content::SiteIsolationPolicy::ShouldUrlUseApplicationIsolationLevel(
          params->initiating_profile, params->url)) {
    CHECK(web_app::AppBrowserController::IsWebApp(params->browser));
  }
#if BUILDFLAG(IS_CHROMEOS)
  if (source_browser && source_browser != params->browser) {
    // When the newly created browser was spawned by a browser which visits
    // another user's desktop, it should be shown on the same desktop as the
    // originating one. (This is part of the desktop separation per profile).
    auto* window_manager = MultiUserWindowManagerHelper::GetWindowManager();
    // Some unit tests have no client instantiated.
    if (window_manager) {
      aura::Window* src_window = source_browser->window()->GetNativeWindow();
      aura::Window* new_window = params->browser->window()->GetNativeWindow();
      const AccountId& src_account_id =
          window_manager->GetUserPresentingWindow(src_window);
      if (src_account_id !=
          window_manager->GetUserPresentingWindow(new_window)) {
        // Once the window gets presented, it should be shown on the same
        // desktop as the desktop of the creating browser. Note that this
        // command will not show the window if it wasn't shown yet by the
        // browser creation.
        window_manager->ShowWindowForUser(new_window, src_account_id);
      }
    }
  }
#endif

  // Navigate() must not return early after this point.

  if (GetSourceProfile(params) != params->browser->profile()) {
    // A tab is being opened from a link from a different profile, we must reset
    // source information that may cause state to be shared.
    params->opener = nullptr;
    params->source_contents = nullptr;
    params->source_site_instance = nullptr;
    params->referrer = content::Referrer();
  }

  // Make sure the Browser is shown if params call for it.
  ScopedBrowserShower shower(params, &contents_to_navigate_or_insert);
  if (params->is_tab_modal_popup_deprecated) {
    shower.set_source_contents(params->source_contents);
  }

  // Some dispositions need coercion to base types.
  NormalizeDisposition(params);

  // If a new window has been created, it needs to be shown.
  if (params->window_action == NavigateParams::NO_ACTION &&
      source_browser != params->browser &&
      params->browser->tab_strip_model()->empty()) {
    params->window_action = NavigateParams::SHOW_WINDOW;
  }

  // If we create a popup window from a non user-gesture, don't activate it.
  if (params->window_action == NavigateParams::SHOW_WINDOW &&
      params->disposition == WindowOpenDisposition::NEW_POPUP &&
      params->user_gesture == false) {
    params->window_action = NavigateParams::SHOW_WINDOW_INACTIVE;
  }

  // Determine if the navigation was user initiated. If it was, we need to
  // inform the target WebContents, and we may need to update the UI.
  bool user_initiated =
      params->transition & ui::PAGE_TRANSITION_FROM_ADDRESS_BAR ||
      !ui::PageTransitionIsWebTriggerable(params->transition);

  base::WeakPtr<content::NavigationHandle> navigation_handle;

  std::unique_ptr<tabs::TabModel> tab_to_insert;
  if (params->contents_to_insert) {
    tab_to_insert =
        std::make_unique<tabs::TabModel>(std::move(params->contents_to_insert),
                                         params->browser->tab_strip_model());
  }

  // If no target WebContents was specified (and we didn't seek and find a
  // singleton), we need to construct one if we are supposed to target a new
  // tab.
  if (!contents_to_navigate_or_insert) {
    DCHECK(!params->url.is_empty());
    if (params->disposition != WindowOpenDisposition::CURRENT_TAB) {
      tab_to_insert = std::make_unique<tabs::TabModel>(
          CreateTargetContents(*params, params->url),
          params->browser->tab_strip_model());
      contents_to_navigate_or_insert = tab_to_insert->GetContents();

      apps::SetAppIdForWebContents(params->browser->profile(),
                                   contents_to_navigate_or_insert,
                                   params->app_id);
#if BUILDFLAG(ENABLE_CAPTIVE_PORTAL_DETECTION)
      captive_portal::CaptivePortalTabHelper::FromWebContents(
          contents_to_navigate_or_insert)
          ->set_window_type(params->captive_portal_window_type);
#endif
    } else {
      // ... otherwise if we're loading in the current tab, the target is the
      // same as the source.
      DCHECK(params->source_contents);
      contents_to_navigate_or_insert = params->source_contents;
    }

    // Try to handle non-navigational URLs that popup dialogs and such, these
    // should not actually navigate.
    if (!HandleNonNavigationAboutURL(
            params->url, contents_to_navigate_or_insert->GetBrowserContext())) {
      // Perform the actual navigation, tracking whether it came from the
      // renderer.
      navigation_handle = LoadURLInContents(contents_to_navigate_or_insert,
                                            params->url, params);
    }
  } else {
    // |contents_to_navigate_or_insert| was specified non-NULL, and so we assume
    // it has already been navigated appropriately. We need to do nothing more
    // other than add it to the appropriate tabstrip.
  }

  // If the user navigated from the omnibox, and the selected tab is going to
  // lose focus, then make sure the focus for the source tab goes away from the
  // omnibox.
  if (params->source_contents &&
      (params->disposition == WindowOpenDisposition::NEW_FOREGROUND_TAB ||
       params->disposition == WindowOpenDisposition::NEW_WINDOW) &&
      (params->tabstrip_add_types & AddTabTypes::ADD_INHERIT_OPENER)) {
    params->source_contents->Focus();
  }

  if (tab_to_insert) {
    // Save data needed for link capturing into apps that cannot otherwise be
    // inferred later in the navigation. These are only needed when the
    // navigation happens in a different tab to the link click.
    apps::SetLinkCapturingSourceDisposition(tab_to_insert->GetContents(),
                                            params->disposition);
  }

  if (params->source_contents == contents_to_navigate_or_insert) {
    // The navigation occurred in the source tab.
    params->browser->UpdateUIForNavigationInTab(
        contents_to_navigate_or_insert, params->transition,
        params->window_action, user_initiated);
  } else if (singleton_index == -1) {
    if (source_browser != params->browser) {
      params->tabstrip_index = params->browser->tab_strip_model()->count();
    }

    // If some non-default value is set for the index, we should tell the
    // TabStripModel to respect it.
    if (params->tabstrip_index != -1) {
      params->tabstrip_add_types |= AddTabTypes::ADD_FORCE_INDEX;
    }

    // Maybe notify that an open operation has been done from a gesture.
    // TODO(crbug.com/40719979): preferably pipe this information through the
    // TabStripModel instead. See bug for deeper discussion.
    if (params->user_gesture && source_browser == params->browser) {
      params->browser->window()->LinkOpeningFromGesture(params->disposition);
    }

    DCHECK(tab_to_insert);
    // The navigation should insert a new tab into the target Browser.
    params->browser->tab_strip_model()->AddTab(
        std::move(tab_to_insert), params->tabstrip_index, params->transition,
        params->tabstrip_add_types, params->group);
  }

  if (singleton_index >= 0) {
    // If switching browsers, make sure it is shown.
    if (params->disposition == WindowOpenDisposition::SWITCH_TO_TAB &&
        params->browser != source_browser) {
      params->window_action = NavigateParams::SHOW_WINDOW;
    }

    if (contents_to_navigate_or_insert->IsCrashed()) {
      contents_to_navigate_or_insert->GetController().Reload(
          content::ReloadType::NORMAL, true);
    } else if (params->path_behavior == NavigateParams::IGNORE_AND_NAVIGATE &&
               contents_to_navigate_or_insert->GetURL() != params->url) {
      navigation_handle = LoadURLInContents(contents_to_navigate_or_insert,
                                            params->url, params);
    }

    // If the singleton tab isn't already selected, select it.
    if (params->source_contents != contents_to_navigate_or_insert) {
      // Use the index before the potential close below, because it could
      // make the index refer to a different tab.
      auto gesture_type = user_initiated
                              ? TabStripUserGestureDetails::GestureType::kOther
                              : TabStripUserGestureDetails::GestureType::kNone;
      bool should_close_this_tab = false;
      if (params->disposition == WindowOpenDisposition::SWITCH_TO_TAB) {
        // Close orphaned NTP (and the like) with no history when the user
        // switches away from them.
        if (params->source_contents) {
          if (params->source_contents->GetController().CanGoBack() ||
              (params->source_contents->GetLastCommittedURL().spec() !=
                   chrome::kChromeUINewTabURL &&
               params->source_contents->GetLastCommittedURL().spec() !=
                   url::kAboutBlankURL)) {
            // Blur location bar before state save in ActivateTabAt() below.
            params->source_contents->Focus();
          } else {
            should_close_this_tab = true;
          }
        }
      }
      params->browser->tab_strip_model()->ActivateTabAt(
          singleton_index, TabStripUserGestureDetails(gesture_type));
      // Close tab after switch so index remains correct.
      if (should_close_this_tab) {
        params->source_contents->Close();
      }
    }
  }

  params->navigated_or_inserted_contents = contents_to_navigate_or_insert;

// At this point, the `params->navigated_or_inserted_contents` is guaranteed to
// be non null, so perform tasks if the navigation has been captured by a web
// app, like enqueueing launch params.
#if !BUILDFLAG(IS_ANDROID)
  if (app_navigation) {
    web_app::NavigationCapturingProcess::AfterWebContentsCreation(
        std::move(app_navigation), *params->navigated_or_inserted_contents,
        navigation_handle.get());
  }
#endif  // !BUILDFLAG(IS_ANDROID)
  return navigation_handle;
}

bool IsURLAllowedInIncognito(const GURL& url) {
  if (url.scheme() == content::kViewSourceScheme) {
    // A view-source URL is allowed in incognito mode only if the URL itself
    // is allowed in incognito mode. Remove the "view-source:" from the start
    // of the URL and validate the rest.
    const size_t scheme_len = strlen(content::kViewSourceScheme);
    CHECK_GT(url.spec().size(), scheme_len);
    std::string_view stripped_url_str(url.spec());
    // Adding +1 for ':' character.
    stripped_url_str.remove_prefix(scheme_len + 1);
    const GURL stripped_url(stripped_url_str);
    if (stripped_url.is_empty()) {
      return true;
    }
    return stripped_url.is_valid() && IsURLAllowedInIncognito(stripped_url);
  }

  return IsHostAllowedInIncognito(url);
}