summaryrefslogtreecommitdiffstats
path: root/widget/windows/nsLookAndFeel.cpp
blob: 01b126cd42317165aec5bfe769024f61634486e6 (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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#include "nsLookAndFeel.h"
#include <stdint.h>
#include <windows.h>
#include <shellapi.h>
#include "nsStyleConsts.h"
#include "nsUXThemeData.h"
#include "nsUXThemeConstants.h"
#include "nsWindowsHelpers.h"
#include "WinUtils.h"
#include "WindowsUIUtils.h"
#include "mozilla/FontPropertyTypes.h"
#include "mozilla/Telemetry.h"
#include "mozilla/widget/WinRegistry.h"

using namespace mozilla;
using namespace mozilla::widget;

static Maybe<nscolor> GetColorFromTheme(nsUXThemeClass cls, int32_t aPart,
                                        int32_t aState, int32_t aPropId) {
  COLORREF color;
  HRESULT hr = GetThemeColor(nsUXThemeData::GetTheme(cls), aPart, aState,
                             aPropId, &color);
  if (hr == S_OK) {
    return Some(COLOREF_2_NSRGB(color));
  }
  return Nothing();
}

static int32_t GetSystemParam(long flag, int32_t def) {
  DWORD value;
  return ::SystemParametersInfo(flag, 0, &value, 0) ? value : def;
}

static bool SystemWantsDarkTheme() {
  if (nsUXThemeData::IsHighContrastOn()) {
    return LookAndFeel::IsDarkColor(
        LookAndFeel::Color(StyleSystemColor::Window, ColorScheme::Light,
                           LookAndFeel::UseStandins::No));
  }

  WinRegistry::Key key(
      HKEY_CURRENT_USER,
      u"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize"_ns,
      WinRegistry::KeyMode::QueryValue);
  if (NS_WARN_IF(!key)) {
    return false;
  }
  uint32_t light = key.GetValueAsDword(u"AppsUseLightTheme"_ns).valueOr(1);
  return !light;
}

uint32_t nsLookAndFeel::SystemColorFilter() {
  if (NS_WARN_IF(!mColorFilterWatcher)) {
    return 0;
  }

  const auto& key = mColorFilterWatcher->GetKey();
  if (!key.GetValueAsDword(u"Active"_ns).valueOr(0)) {
    return 0;
  }
  return key.GetValueAsDword(u"FilterType"_ns).valueOr(0);
}

nsLookAndFeel::nsLookAndFeel() {
  mozilla::Telemetry::Accumulate(mozilla::Telemetry::TOUCH_ENABLED_DEVICE,
                                 WinUtils::IsTouchDeviceSupportPresent());
}

nsLookAndFeel::~nsLookAndFeel() = default;

void nsLookAndFeel::NativeInit() { EnsureInit(); }

/* virtual */
void nsLookAndFeel::RefreshImpl() {
  mInitialized = false;  // Fetch system colors next time they're used.
  nsXPLookAndFeel::RefreshImpl();
}

static bool UseNonNativeMenuColors(ColorScheme aScheme) {
  return !LookAndFeel::GetInt(LookAndFeel::IntID::UseAccessibilityTheme) ||
         aScheme == ColorScheme::Dark;
}

nsresult nsLookAndFeel::NativeGetColor(ColorID aID, ColorScheme aScheme,
                                       nscolor& aColor) {
  EnsureInit();

  auto IsHighlightColor = [&] {
    switch (aID) {
      case ColorID::MozMenuhover:
        return !UseNonNativeMenuColors(aScheme);
      case ColorID::Highlight:
      case ColorID::Selecteditem:
        // We prefer the generic dark selection color if we don't have an
        // explicit one.
        return aScheme != ColorScheme::Dark || mDarkHighlight;
      case ColorID::IMESelectedRawTextBackground:
      case ColorID::IMESelectedConvertedTextBackground:
        return true;
      default:
        return false;
    }
  };

  auto IsHighlightTextColor = [&] {
    switch (aID) {
      case ColorID::MozMenubarhovertext:
        if (UseNonNativeMenuColors(aScheme)) {
          return false;
        }
        [[fallthrough]];
      case ColorID::MozMenuhovertext:
        if (UseNonNativeMenuColors(aScheme)) {
          return false;
        }
        return !mColorMenuHoverText;
      case ColorID::Highlighttext:
      case ColorID::Selecteditemtext:
        // We prefer the generic dark selection color if we don't have an
        // explicit one.
        return aScheme != ColorScheme::Dark || mDarkHighlightText;
      case ColorID::IMESelectedRawTextForeground:
      case ColorID::IMESelectedConvertedTextForeground:
        return true;
      default:
        return false;
    }
  };

  if (IsHighlightColor()) {
    if (aScheme == ColorScheme::Dark && mDarkHighlight) {
      aColor = *mDarkHighlight;
    } else {
      aColor = GetColorForSysColorIndex(COLOR_HIGHLIGHT);
    }
    return NS_OK;
  }

  if (IsHighlightTextColor()) {
    if (aScheme == ColorScheme::Dark && mDarkHighlightText) {
      aColor = *mDarkHighlightText;
    } else {
      aColor = GetColorForSysColorIndex(COLOR_HIGHLIGHTTEXT);
    }
    return NS_OK;
  }

  // Titlebar colors are color-scheme aware.
  switch (aID) {
    case ColorID::Activecaption:
      aColor = mTitlebarColors.Get(aScheme, true).mBg;
      return NS_OK;
    case ColorID::Captiontext:
      aColor = mTitlebarColors.Get(aScheme, true).mFg;
      return NS_OK;
    case ColorID::Activeborder:
      aColor = mTitlebarColors.Get(aScheme, true).mBorder;
      return NS_OK;
    case ColorID::Inactivecaption:
      aColor = mTitlebarColors.Get(aScheme, false).mBg;
      return NS_OK;
    case ColorID::Inactivecaptiontext:
      aColor = mTitlebarColors.Get(aScheme, false).mFg;
      return NS_OK;
    case ColorID::Inactiveborder:
      aColor = mTitlebarColors.Get(aScheme, false).mBorder;
      return NS_OK;
    default:
      break;
  }

  if (aScheme == ColorScheme::Dark) {
    if (auto color = GenericDarkColor(aID)) {
      aColor = *color;
      return NS_OK;
    }
  }

  static constexpr auto kNonNativeMenuText = NS_RGB(0x15, 0x14, 0x1a);
  nsresult res = NS_OK;
  int idx;
  switch (aID) {
    case ColorID::IMERawInputBackground:
    case ColorID::IMEConvertedTextBackground:
      aColor = NS_TRANSPARENT;
      return NS_OK;
    case ColorID::IMERawInputForeground:
    case ColorID::IMEConvertedTextForeground:
      aColor = NS_SAME_AS_FOREGROUND_COLOR;
      return NS_OK;
    case ColorID::IMERawInputUnderline:
    case ColorID::IMEConvertedTextUnderline:
      aColor = NS_SAME_AS_FOREGROUND_COLOR;
      return NS_OK;
    case ColorID::IMESelectedRawTextUnderline:
    case ColorID::IMESelectedConvertedTextUnderline:
      aColor = NS_TRANSPARENT;
      return NS_OK;

    // New CSS 2 Color definitions
    case ColorID::Appworkspace:
      idx = COLOR_APPWORKSPACE;
      break;
    case ColorID::Background:
      idx = COLOR_BACKGROUND;
      break;
    case ColorID::Buttonface:
    case ColorID::MozButtonhoverface:
    case ColorID::MozButtonactiveface:
    case ColorID::MozButtondisabledface:
    case ColorID::MozColheader:
    case ColorID::MozColheaderhover:
    case ColorID::MozColheaderactive:
      idx = COLOR_BTNFACE;
      break;
    case ColorID::Buttonhighlight:
      idx = COLOR_BTNHIGHLIGHT;
      break;
    case ColorID::Buttonshadow:
      idx = COLOR_BTNSHADOW;
      break;
    case ColorID::Buttontext:
    case ColorID::MozButtonhovertext:
    case ColorID::MozButtonactivetext:
      idx = COLOR_BTNTEXT;
      break;
    case ColorID::MozCellhighlighttext:
      aColor = NS_RGB(0, 0, 0);
      return NS_OK;
    case ColorID::MozCellhighlight:
      aColor = NS_RGB(206, 206, 206);
      return NS_OK;
    case ColorID::Graytext:
      idx = COLOR_GRAYTEXT;
      break;
    case ColorID::MozMenubarhovertext:
      if (UseNonNativeMenuColors(aScheme)) {
        aColor = kNonNativeMenuText;
        return NS_OK;
      }
      [[fallthrough]];
    case ColorID::MozMenuhovertext:
      if (UseNonNativeMenuColors(aScheme)) {
        aColor = kNonNativeMenuText;
        return NS_OK;
      }
      if (mColorMenuHoverText) {
        aColor = *mColorMenuHoverText;
        return NS_OK;
      }
      idx = COLOR_HIGHLIGHTTEXT;
      break;
    case ColorID::MozMenuhover:
      MOZ_ASSERT(UseNonNativeMenuColors(aScheme));
      aColor = NS_RGB(0xe0, 0xe0, 0xe6);
      return NS_OK;
    case ColorID::MozMenuhoverdisabled:
      if (UseNonNativeMenuColors(aScheme)) {
        aColor = NS_RGB(0xf0, 0xf0, 0xf3);
        return NS_OK;
      }
      aColor = NS_TRANSPARENT;
      return NS_OK;
    case ColorID::Infobackground:
      idx = COLOR_INFOBK;
      break;
    case ColorID::Infotext:
      idx = COLOR_INFOTEXT;
      break;
    case ColorID::Menu:
      if (UseNonNativeMenuColors(aScheme)) {
        aColor = NS_RGB(0xf9, 0xf9, 0xfb);
        return NS_OK;
      }
      idx = COLOR_MENU;
      break;
    case ColorID::Menutext:
      if (UseNonNativeMenuColors(aScheme)) {
        aColor = kNonNativeMenuText;
        return NS_OK;
      }
      idx = COLOR_MENUTEXT;
      break;
    case ColorID::Scrollbar:
      idx = COLOR_SCROLLBAR;
      break;
    case ColorID::Threeddarkshadow:
      idx = COLOR_3DDKSHADOW;
      break;
    case ColorID::Threedface:
      idx = COLOR_3DFACE;
      break;
    case ColorID::Threedhighlight:
      idx = COLOR_3DHIGHLIGHT;
      break;
    case ColorID::Threedlightshadow:
    case ColorID::Buttonborder:
    case ColorID::MozDisabledfield:
    case ColorID::MozSidebarborder:
      idx = COLOR_3DLIGHT;
      break;
    case ColorID::Threedshadow:
      idx = COLOR_3DSHADOW;
      break;
    case ColorID::Window:
      idx = COLOR_WINDOW;
      break;
    case ColorID::Windowframe:
      idx = COLOR_WINDOWFRAME;
      break;
    case ColorID::Windowtext:
      idx = COLOR_WINDOWTEXT;
      break;
    case ColorID::MozEventreerow:
    case ColorID::MozOddtreerow:
    case ColorID::Field:
    case ColorID::MozSidebar:
    case ColorID::MozCombobox:
      idx = COLOR_WINDOW;
      break;
    case ColorID::Fieldtext:
    case ColorID::MozSidebartext:
    case ColorID::MozComboboxtext:
      idx = COLOR_WINDOWTEXT;
      break;
    case ColorID::MozHeaderbar:
    case ColorID::MozHeaderbarinactive:
    case ColorID::MozDialog:
      idx = COLOR_3DFACE;
      break;
    case ColorID::Accentcolor:
      aColor = mColorAccent;
      return NS_OK;
    case ColorID::Accentcolortext:
      aColor = mColorAccentText;
      return NS_OK;
    case ColorID::MozHeaderbartext:
    case ColorID::MozHeaderbarinactivetext:
    case ColorID::MozDialogtext:
    case ColorID::MozColheadertext:
    case ColorID::MozColheaderhovertext:
    case ColorID::MozColheaderactivetext:
      idx = COLOR_WINDOWTEXT;
      break;
    case ColorID::MozNativehyperlinktext:
      idx = COLOR_HOTLIGHT;
      break;
    case ColorID::Marktext:
    case ColorID::Mark:
    case ColorID::SpellCheckerUnderline:
      aColor = GetStandinForNativeColor(aID, aScheme);
      return NS_OK;
    default:
      idx = COLOR_WINDOW;
      res = NS_ERROR_FAILURE;
      break;
  }

  aColor = GetColorForSysColorIndex(idx);

  return res;
}

nsresult nsLookAndFeel::NativeGetInt(IntID aID, int32_t& aResult) {
  EnsureInit();
  nsresult res = NS_OK;

  switch (aID) {
    case IntID::ScrollButtonLeftMouseButtonAction:
      aResult = 0;
      break;
    case IntID::ScrollButtonMiddleMouseButtonAction:
    case IntID::ScrollButtonRightMouseButtonAction:
      aResult = 3;
      break;
    case IntID::CaretBlinkTime:
      aResult = static_cast<int32_t>(::GetCaretBlinkTime());
      break;
    case IntID::CaretBlinkCount: {
      int32_t timeout = GetSystemParam(SPI_GETCARETTIMEOUT, 5000);
      auto blinkTime = ::GetCaretBlinkTime();
      if (timeout <= 0 || blinkTime <= 0) {
        aResult = -1;
        break;
      }
      // 2 * blinkTime because this integer is a full blink cycle.
      aResult = std::ceil(float(timeout) / (2.0f * float(blinkTime)));
      break;
    }

    case IntID::CaretWidth:
      aResult = 1;
      break;
    case IntID::ShowCaretDuringSelection:
      aResult = 0;
      break;
    case IntID::SelectTextfieldsOnKeyFocus:
      // Select textfield content when focused by kbd
      // used by EventStateManager::sTextfieldSelectModel
      aResult = 1;
      break;
    case IntID::SubmenuDelay:
      // This will default to the Windows' default
      // (400ms) on error.
      aResult = GetSystemParam(SPI_GETMENUSHOWDELAY, 400);
      break;
    case IntID::TooltipDelay:
      aResult = 500;
      break;
    case IntID::MenusCanOverlapOSBar:
      // we want XUL popups to be able to overlap the task bar.
      aResult = 1;
      break;
    case IntID::DragThresholdX:
      // The system metric is the number of pixels at which a drag should
      // start.  Our look and feel metric is the number of pixels you can
      // move before starting a drag, so subtract 1.
      aResult = ::GetSystemMetrics(SM_CXDRAG) - 1;
      break;
    case IntID::DragThresholdY:
      aResult = ::GetSystemMetrics(SM_CYDRAG) - 1;
      break;
    case IntID::UseAccessibilityTheme:
      // High contrast is a misnomer under Win32 -- any theme can be used with
      // it, e.g. normal contrast with large fonts, low contrast, etc. The high
      // contrast flag really means -- use this theme and don't override it.
      aResult = nsUXThemeData::IsHighContrastOn();
      break;
    case IntID::ScrollArrowStyle:
      aResult = eScrollArrowStyle_Single;
      break;
    case IntID::TreeOpenDelay:
      aResult = 1000;
      break;
    case IntID::TreeCloseDelay:
      aResult = 0;
      break;
    case IntID::TreeLazyScrollDelay:
      aResult = 150;
      break;
    case IntID::TreeScrollDelay:
      aResult = 100;
      break;
    case IntID::TreeScrollLinesMax:
      aResult = 3;
      break;
    case IntID::WindowsAccentColorInTitlebar: {
      aResult = mTitlebarColors.mUseAccent;
    } break;
    case IntID::AlertNotificationOrigin:
      aResult = 0;
      {
        // Get task bar window handle
        HWND shellWindow = FindWindowW(L"Shell_TrayWnd", nullptr);

        if (shellWindow != nullptr) {
          // Determine position
          APPBARDATA appBarData;
          appBarData.hWnd = shellWindow;
          appBarData.cbSize = sizeof(appBarData);
          if (SHAppBarMessage(ABM_GETTASKBARPOS, &appBarData)) {
            // Set alert origin as a bit field - see LookAndFeel.h
            // 0 represents bottom right, sliding vertically.
            switch (appBarData.uEdge) {
              case ABE_LEFT:
                aResult = NS_ALERT_HORIZONTAL | NS_ALERT_LEFT;
                break;
              case ABE_RIGHT:
                aResult = NS_ALERT_HORIZONTAL;
                break;
              case ABE_TOP:
                aResult = NS_ALERT_TOP;
                [[fallthrough]];
              case ABE_BOTTOM:
                // If the task bar is right-to-left,
                // move the origin to the left
                if (::GetWindowLong(shellWindow, GWL_EXSTYLE) & WS_EX_LAYOUTRTL)
                  aResult |= NS_ALERT_LEFT;
                break;
            }
          }
        }
      }
      break;
    case IntID::IMERawInputUnderlineStyle:
    case IntID::IMEConvertedTextUnderlineStyle:
      aResult = static_cast<int32_t>(StyleTextDecorationStyle::Dashed);
      break;
    case IntID::IMESelectedRawTextUnderlineStyle:
    case IntID::IMESelectedConvertedTextUnderline:
      aResult = static_cast<int32_t>(StyleTextDecorationStyle::None);
      break;
    case IntID::SpellCheckerUnderlineStyle:
      aResult = static_cast<int32_t>(StyleTextDecorationStyle::Wavy);
      break;
    case IntID::ScrollbarButtonAutoRepeatBehavior:
      aResult = 0;
      break;
    case IntID::SwipeAnimationEnabled:
      // Forcibly enable the swipe animation on Windows. It doesn't matter on
      // platforms where "Drag two fingers to scroll" isn't supported since on
      // the platforms we will never generate any swipe gesture events.
      aResult = 1;
      break;
    case IntID::UseOverlayScrollbars:
      aResult = WindowsUIUtils::ComputeOverlayScrollbars();
      break;
    case IntID::AllowOverlayScrollbarsOverlap:
      aResult = 0;
      break;
    case IntID::ScrollbarDisplayOnMouseMove:
      aResult = 1;
      break;
    case IntID::ScrollbarFadeBeginDelay:
      aResult = 2500;
      break;
    case IntID::ScrollbarFadeDuration:
      aResult = 350;
      break;
    case IntID::ContextMenuOffsetVertical:
    case IntID::ContextMenuOffsetHorizontal:
      aResult = 2;
      break;
    case IntID::SystemUsesDarkTheme:
      aResult = SystemWantsDarkTheme();
      break;
    case IntID::SystemScrollbarSize:
      aResult = std::max(WinUtils::GetSystemMetricsForDpi(SM_CXVSCROLL, 96),
                         WinUtils::GetSystemMetricsForDpi(SM_CXHSCROLL, 96));
      break;
    case IntID::PrefersReducedMotion: {
      BOOL enable = TRUE;
      ::SystemParametersInfoW(SPI_GETCLIENTAREAANIMATION, 0, &enable, 0);
      aResult = !enable;
      break;
    }
    case IntID::PrefersReducedTransparency: {
      // Prefers reduced transparency if the option for "Transparency Effects"
      // is disabled
      aResult = !WindowsUIUtils::ComputeTransparencyEffects();
      break;
    }
    case IntID::InvertedColors: {
      // Color filter values
      // 1: Inverted
      // 2: Grayscale inverted
      aResult = mCurrentColorFilter == 1 || mCurrentColorFilter == 2;
      break;
    }
    case IntID::PrimaryPointerCapabilities: {
      aResult = static_cast<int32_t>(
          widget::WinUtils::GetPrimaryPointerCapabilities());
      break;
    }
    case IntID::AllPointerCapabilities: {
      aResult =
          static_cast<int32_t>(widget::WinUtils::GetAllPointerCapabilities());
      break;
    }
    case IntID::TouchDeviceSupportPresent:
      aResult = !!WinUtils::IsTouchDeviceSupportPresent();
      break;
    case IntID::PanelAnimations:
      aResult = 1;
      break;
    case IntID::HideCursorWhileTyping: {
      BOOL enable = TRUE;
      ::SystemParametersInfoW(SPI_GETMOUSEVANISH, 0, &enable, 0);
      aResult = enable;
      break;
    }
    default:
      aResult = 0;
      res = NS_ERROR_FAILURE;
  }
  return res;
}

nsresult nsLookAndFeel::NativeGetFloat(FloatID aID, float& aResult) {
  nsresult res = NS_OK;

  switch (aID) {
    case FloatID::IMEUnderlineRelativeSize:
      aResult = 1.0f;
      break;
    case FloatID::SpellCheckerUnderlineRelativeSize:
      aResult = 1.0f;
      break;
    case FloatID::TextScaleFactor:
      aResult = WindowsUIUtils::ComputeTextScaleFactor();
      break;
    default:
      aResult = -1.0;
      res = NS_ERROR_FAILURE;
  }
  return res;
}

LookAndFeelFont nsLookAndFeel::GetLookAndFeelFontInternal(
    const LOGFONTW& aLogFont, bool aUseShellDlg) {
  LookAndFeelFont result{};

  result.haveFont() = false;

  // Get scaling factor from physical to logical pixels
  double pixelScale =
      1.0 / WinUtils::SystemScaleFactor() / LookAndFeel::GetTextScaleFactor();

  // The lfHeight is in pixels, and it needs to be adjusted for the
  // device it will be displayed on.
  // Screens and Printers will differ in DPI
  //
  // So this accounts for the difference in the DeviceContexts
  // The pixelScale will typically be 1.0 for the screen
  // (though larger for hi-dpi screens where the Windows resolution
  // scale factor is 125% or 150% or even more), and could be
  // any value when going to a printer, for example pixelScale is
  // 6.25 when going to a 600dpi printer.
  float pixelHeight = -aLogFont.lfHeight;
  if (pixelHeight < 0) {
    nsAutoFont hFont(::CreateFontIndirectW(&aLogFont));
    if (!hFont) {
      return result;
    }

    nsAutoHDC dc(::GetDC(nullptr));
    HGDIOBJ hObject = ::SelectObject(dc, hFont);
    TEXTMETRIC tm;
    ::GetTextMetrics(dc, &tm);
    ::SelectObject(dc, hObject);

    pixelHeight = tm.tmAscent;
  }

  pixelHeight *= pixelScale;

  // we have problem on Simplified Chinese system because the system
  // report the default font size is 8 points. but if we use 8, the text
  // display very ugly. force it to be at 9 points (12 pixels) on that
  // system (cp936), but leave other sizes alone.
  if (pixelHeight < 12 && ::GetACP() == 936) {
    pixelHeight = 12;
  }

  result.haveFont() = true;

  if (aUseShellDlg) {
    result.name() = u"MS Shell Dlg 2"_ns;
  } else {
    result.name() = aLogFont.lfFaceName;
  }

  result.size() = pixelHeight;
  result.italic() = !!aLogFont.lfItalic;
  // FIXME: Other weights?
  result.weight() =
      ((aLogFont.lfWeight == FW_BOLD) ? FontWeight::BOLD : FontWeight::NORMAL)
          .ToFloat();

  return result;
}

LookAndFeelFont nsLookAndFeel::GetLookAndFeelFont(LookAndFeel::FontID anID) {
  LookAndFeelFont result{};

  result.haveFont() = false;

  // FontID::Icon is handled differently than the others
  if (anID == LookAndFeel::FontID::Icon) {
    LOGFONTW logFont;
    if (::SystemParametersInfoW(SPI_GETICONTITLELOGFONT, sizeof(logFont),
                                (PVOID)&logFont, 0)) {
      result = GetLookAndFeelFontInternal(logFont, false);
    }
    return result;
  }

  NONCLIENTMETRICSW ncm;
  ncm.cbSize = sizeof(NONCLIENTMETRICSW);
  if (!::SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, sizeof(ncm),
                               (PVOID)&ncm, 0)) {
    return result;
  }

  switch (anID) {
    case LookAndFeel::FontID::Menu:
    case LookAndFeel::FontID::MozPullDownMenu:
      result = GetLookAndFeelFontInternal(ncm.lfMenuFont, false);
      break;
    case LookAndFeel::FontID::Caption:
      result = GetLookAndFeelFontInternal(ncm.lfCaptionFont, false);
      break;
    case LookAndFeel::FontID::SmallCaption:
      result = GetLookAndFeelFontInternal(ncm.lfSmCaptionFont, false);
      break;
    case LookAndFeel::FontID::StatusBar:
      result = GetLookAndFeelFontInternal(ncm.lfStatusFont, false);
      break;
    case LookAndFeel::FontID::MozButton:
    case LookAndFeel::FontID::MozField:
    case LookAndFeel::FontID::MozList:
      // XXX It's not clear to me whether this is exactly the right
      // set of LookAndFeel values to map to the dialog font; we may
      // want to add or remove cases here after reviewing the visual
      // results under various Windows versions.
      result = GetLookAndFeelFontInternal(ncm.lfMessageFont, true);
      break;
    default:
      result = GetLookAndFeelFontInternal(ncm.lfMessageFont, false);
      break;
  }

  return result;
}

bool nsLookAndFeel::NativeGetFont(LookAndFeel::FontID anID, nsString& aFontName,
                                  gfxFontStyle& aFontStyle) {
  LookAndFeelFont font = GetLookAndFeelFont(anID);
  return LookAndFeelFontToStyle(font, aFontName, aFontStyle);
}

/* virtual */
char16_t nsLookAndFeel::GetPasswordCharacterImpl() {
#define UNICODE_BLACK_CIRCLE_CHAR 0x25cf
  return UNICODE_BLACK_CIRCLE_CHAR;
}

static nscolor GetAccentColorText(const nscolor aAccentColor) {
  // We want the color that we return for text that will be drawn over
  // a background that has the accent color to have good contrast with
  // the accent color.  Windows itself uses either white or black text
  // depending on how light or dark the accent color is.  We do the same
  // here based on the luminance of the accent color with a threshhold
  // value.  This algorithm should match what Windows does.  It comes from:
  //
  // https://docs.microsoft.com/en-us/windows/uwp/style/color
  float luminance = (NS_GET_R(aAccentColor) * 2 + NS_GET_G(aAccentColor) * 5 +
                     NS_GET_B(aAccentColor)) /
                    8;
  return luminance <= 128 ? NS_RGB(255, 255, 255) : NS_RGB(0, 0, 0);
}

static Maybe<nscolor> GetAccentColorText(const Maybe<nscolor>& aAccentColor) {
  if (!aAccentColor) {
    return Nothing();
  }
  return Some(GetAccentColorText(*aAccentColor));
}

nscolor nsLookAndFeel::GetColorForSysColorIndex(int index) {
  MOZ_ASSERT(index >= SYS_COLOR_MIN && index <= SYS_COLOR_MAX);
  return mSysColorTable[index - SYS_COLOR_MIN];
}

auto nsLookAndFeel::ComputeTitlebarColors() -> TitlebarColors {
  TitlebarColors result;

  // Start with the native / non-accent-in-titlebar colors.
  result.mActiveLight = {GetColorForSysColorIndex(COLOR_ACTIVECAPTION),
                         GetColorForSysColorIndex(COLOR_CAPTIONTEXT),
                         GetColorForSysColorIndex(COLOR_ACTIVEBORDER)};

  result.mInactiveLight = {GetColorForSysColorIndex(COLOR_INACTIVECAPTION),
                           GetColorForSysColorIndex(COLOR_INACTIVECAPTIONTEXT),
                           GetColorForSysColorIndex(COLOR_INACTIVEBORDER)};

  if (!nsUXThemeData::IsHighContrastOn()) {
    // Use our non-native colors.
    result.mActiveLight = {
        GetStandinForNativeColor(ColorID::Activecaption, ColorScheme::Light),
        GetStandinForNativeColor(ColorID::Captiontext, ColorScheme::Light),
        GetStandinForNativeColor(ColorID::Activeborder, ColorScheme::Light)};
    result.mInactiveLight = {
        GetStandinForNativeColor(ColorID::Inactivecaption, ColorScheme::Light),
        GetStandinForNativeColor(ColorID::Inactivecaptiontext,
                                 ColorScheme::Light),
        GetStandinForNativeColor(ColorID::Inactiveborder, ColorScheme::Light)};
  }

  // Our dark colors are always non-native.
  result.mActiveDark = {*GenericDarkColor(ColorID::Activecaption),
                        *GenericDarkColor(ColorID::Captiontext),
                        *GenericDarkColor(ColorID::Activeborder)};
  result.mInactiveDark = {*GenericDarkColor(ColorID::Inactivecaption),
                          *GenericDarkColor(ColorID::Inactivecaptiontext),
                          *GenericDarkColor(ColorID::Inactiveborder)};

  // TODO(bug 1825241): Somehow get notified when this changes? Hopefully the
  // sys color notification is enough.
  WinRegistry::Key dwmKey(HKEY_CURRENT_USER,
                          u"SOFTWARE\\Microsoft\\Windows\\DWM"_ns,
                          WinRegistry::KeyMode::QueryValue);
  if (NS_WARN_IF(!dwmKey)) {
    return result;
  }

  // The order of the color components in the DWORD stored in the registry
  // happens to be the same order as we store the components in nscolor
  // so we can just assign directly here.
  result.mAccent = dwmKey.GetValueAsDword(u"AccentColor"_ns);
  result.mAccentText = GetAccentColorText(result.mAccent);

  if (!result.mAccent) {
    return result;
  }

  result.mAccentInactive = dwmKey.GetValueAsDword(u"AccentColorInactive"_ns);
  result.mAccentInactiveText = GetAccentColorText(result.mAccentInactive);

  // The ColorPrevalence value is set to 1 when the "Show color on title bar"
  // setting in the Color section of Window's Personalization settings is
  // turned on.
  result.mUseAccent =
      dwmKey.GetValueAsDword(u"ColorPrevalence"_ns).valueOr(0) == 1;
  if (!result.mUseAccent) {
    return result;
  }

  // TODO(emilio): Consider reading ColorizationColorBalance to compute a
  // more correct border color, see [1]. Though for opaque accent colors this
  // isn't needed.
  //
  // [1]:
  // https://source.chromium.org/chromium/chromium/src/+/refs/heads/main:ui/color/win/accent_color_observer.cc;l=42;drc=9d4eb7ed25296abba8fd525a6bdd0fdbf4bcdd9f
  result.mActiveDark.mBorder = result.mActiveLight.mBorder = *result.mAccent;
  result.mInactiveDark.mBorder = result.mInactiveLight.mBorder =
      result.mAccentInactive.valueOr(NS_RGB(57, 57, 57));
  result.mActiveLight.mBg = result.mActiveDark.mBg = *result.mAccent;
  result.mActiveLight.mFg = result.mActiveDark.mFg = *result.mAccentText;
  if (result.mAccentInactive) {
    result.mInactiveLight.mBg = result.mInactiveDark.mBg =
        *result.mAccentInactive;
    result.mInactiveLight.mFg = result.mInactiveDark.mFg =
        *result.mAccentInactiveText;
  } else {
    // This is hand-picked to .8 to change the accent color a bit but not too
    // much.
    constexpr uint8_t kBgAlpha = 208;
    const auto BlendWithAlpha = [](nscolor aBg, nscolor aFg,
                                   uint8_t aAlpha) -> nscolor {
      return NS_ComposeColors(
          aBg, NS_RGBA(NS_GET_R(aFg), NS_GET_G(aFg), NS_GET_B(aFg), aAlpha));
    };
    result.mInactiveLight.mBg =
        BlendWithAlpha(NS_RGB(255, 255, 255), *result.mAccent, kBgAlpha);
    result.mInactiveDark.mBg =
        BlendWithAlpha(NS_RGB(0, 0, 0), *result.mAccent, kBgAlpha);
    result.mInactiveLight.mFg = result.mInactiveDark.mFg = *result.mAccentText;
  }
  return result;
}

void nsLookAndFeel::EnsureInit() {
  if (mInitialized) {
    return;
  }
  mInitialized = true;

  mColorMenuHoverText =
      ::GetColorFromTheme(eUXMenu, MENU_POPUPITEM, MPI_HOT, TMT_TEXTCOLOR);

  // Fill out the sys color table.
  for (int i = SYS_COLOR_MIN; i <= SYS_COLOR_MAX; ++i) {
    mSysColorTable[i - SYS_COLOR_MIN] = [&] {
      if (auto c = WindowsUIUtils::GetSystemColor(ColorScheme::Light, i)) {
        return *c;
      }
      DWORD color = ::GetSysColor(i);
      return COLOREF_2_NSRGB(color);
    }();
  }

  mDarkHighlight =
      WindowsUIUtils::GetSystemColor(ColorScheme::Dark, COLOR_HIGHLIGHT);
  mDarkHighlightText =
      WindowsUIUtils::GetSystemColor(ColorScheme::Dark, COLOR_HIGHLIGHTTEXT);

  mTitlebarColors = ComputeTitlebarColors();

  mColorAccent = [&] {
    if (auto accent = WindowsUIUtils::GetAccentColor()) {
      return *accent;
    }
    // Try the titlebar accent as a fallback.
    if (mTitlebarColors.mAccent) {
      return *mTitlebarColors.mAccent;
    }
    // Seems to be the default color (hardcoded because of bug 1065998)
    return NS_RGB(0, 120, 215);
  }();
  mColorAccentText = GetAccentColorText(mColorAccent);

  if (!mColorFilterWatcher) {
    WinRegistry::Key key(
        HKEY_CURRENT_USER, u"Software\\Microsoft\\ColorFiltering"_ns,
        WinRegistry::KeyMode::QueryValue | WinRegistry::KeyMode::Notify);
    if (key) {
      mColorFilterWatcher = MakeUnique<WinRegistry::KeyWatcher>(
          std::move(key), GetCurrentSerialEventTarget(), [this] {
            MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
            if (mCurrentColorFilter != SystemColorFilter()) {
              LookAndFeel::NotifyChangedAllWindows(
                  widget::ThemeChangeKind::MediaQueriesOnly);
            }
          });
    }
  }
  mCurrentColorFilter = SystemColorFilter();

  RecordTelemetry();
}