DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (5350524bb654)

VCS Links

Line Code
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
/* -*- 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 <windows.h>
#include <shellapi.h>
#include "nsStyleConsts.h"
#include "nsUXThemeData.h"
#include "nsUXThemeConstants.h"
#include "gfxFont.h"
#include "WinUtils.h"
#include "mozilla/Telemetry.h"
#include "mozilla/WindowsVersion.h"
#include "gfxFontConstants.h"

using namespace mozilla;
using namespace mozilla::widget;

//static
LookAndFeel::OperatingSystemVersion
nsLookAndFeel::GetOperatingSystemVersion()
{
  static OperatingSystemVersion version = eOperatingSystemVersion_Unknown;

  if (version != eOperatingSystemVersion_Unknown) {
    return version;
  }

  if (IsWin10OrLater()) {
    version = eOperatingSystemVersion_Windows10;
  } else if (IsWin8OrLater()) {
    version = eOperatingSystemVersion_Windows8;
  } else if (IsWin7OrLater()) {
    version = eOperatingSystemVersion_Windows7;
  } else if (IsVistaOrLater()) {
    version = eOperatingSystemVersion_WindowsVista;
  } else {
    version = eOperatingSystemVersion_WindowsXP;
  }

  return version;
}

static nsresult GetColorFromTheme(nsUXThemeClass cls,
                           int32_t aPart,
                           int32_t aState,
                           int32_t aPropId,
                           nscolor &aColor)
{
  COLORREF color;
  HRESULT hr = GetThemeColor(nsUXThemeData::GetTheme(cls), aPart, aState, aPropId, &color);
  if (hr == S_OK)
  {
    aColor = COLOREF_2_NSRGB(color);
    return NS_OK;
  }
  return NS_ERROR_FAILURE;
}

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

nsLookAndFeel::nsLookAndFeel()
  : nsXPLookAndFeel()
  , mUseAccessibilityTheme(0)
{
  mozilla::Telemetry::Accumulate(mozilla::Telemetry::TOUCH_ENABLED_DEVICE,
                                 WinUtils::IsTouchDeviceSupportPresent());
}

nsLookAndFeel::~nsLookAndFeel()
{
}

nsresult
nsLookAndFeel::NativeGetColor(ColorID aID, nscolor &aColor)
{
  nsresult res = NS_OK;

  int idx;
  switch (aID) {
    case eColorID_WindowBackground:
        idx = COLOR_WINDOW;
        break;
    case eColorID_WindowForeground:
        idx = COLOR_WINDOWTEXT;
        break;
    case eColorID_WidgetBackground:
        idx = COLOR_BTNFACE;
        break;
    case eColorID_WidgetForeground:
        idx = COLOR_BTNTEXT;
        break;
    case eColorID_WidgetSelectBackground:
        idx = COLOR_HIGHLIGHT;
        break;
    case eColorID_WidgetSelectForeground:
        idx = COLOR_HIGHLIGHTTEXT;
        break;
    case eColorID_Widget3DHighlight:
        idx = COLOR_BTNHIGHLIGHT;
        break;
    case eColorID_Widget3DShadow:
        idx = COLOR_BTNSHADOW;
        break;
    case eColorID_TextBackground:
        idx = COLOR_WINDOW;
        break;
    case eColorID_TextForeground:
        idx = COLOR_WINDOWTEXT;
        break;
    case eColorID_TextSelectBackground:
    case eColorID_IMESelectedRawTextBackground:
    case eColorID_IMESelectedConvertedTextBackground:
        idx = COLOR_HIGHLIGHT;
        break;
    case eColorID_TextSelectForeground:
    case eColorID_IMESelectedRawTextForeground:
    case eColorID_IMESelectedConvertedTextForeground:
        idx = COLOR_HIGHLIGHTTEXT;
        break;
    case eColorID_IMERawInputBackground:
    case eColorID_IMEConvertedTextBackground:
        aColor = NS_TRANSPARENT;
        return NS_OK;
    case eColorID_IMERawInputForeground:
    case eColorID_IMEConvertedTextForeground:
        aColor = NS_SAME_AS_FOREGROUND_COLOR;
        return NS_OK;
    case eColorID_IMERawInputUnderline:
    case eColorID_IMEConvertedTextUnderline:
        aColor = NS_SAME_AS_FOREGROUND_COLOR;
        return NS_OK;
    case eColorID_IMESelectedRawTextUnderline:
    case eColorID_IMESelectedConvertedTextUnderline:
        aColor = NS_TRANSPARENT;
        return NS_OK;
    case eColorID_SpellCheckerUnderline:
        aColor = NS_RGB(0xff, 0, 0);
        return NS_OK;

    // New CSS 2 Color definitions
    case eColorID_activeborder:
      idx = COLOR_ACTIVEBORDER;
      break;
    case eColorID_activecaption:
      idx = COLOR_ACTIVECAPTION;
      break;
    case eColorID_appworkspace:
      idx = COLOR_APPWORKSPACE;
      break;
    case eColorID_background:
      idx = COLOR_BACKGROUND;
      break;
    case eColorID_buttonface:
    case eColorID__moz_buttonhoverface:
      idx = COLOR_BTNFACE;
      break;
    case eColorID_buttonhighlight:
      idx = COLOR_BTNHIGHLIGHT;
      break;
    case eColorID_buttonshadow:
      idx = COLOR_BTNSHADOW;
      break;
    case eColorID_buttontext:
    case eColorID__moz_buttonhovertext:
      idx = COLOR_BTNTEXT;
      break;
    case eColorID_captiontext:
      idx = COLOR_CAPTIONTEXT;
      break;
    case eColorID_graytext:
      idx = COLOR_GRAYTEXT;
      break;
    case eColorID_highlight:
    case eColorID__moz_html_cellhighlight:
    case eColorID__moz_menuhover:
      idx = COLOR_HIGHLIGHT;
      break;
    case eColorID__moz_menubarhovertext:
      if (!IsVistaOrLater() || !IsAppThemed())
      {
        idx = nsUXThemeData::sFlatMenus ?
                COLOR_HIGHLIGHTTEXT :
                COLOR_MENUTEXT;
        break;
      }
      // Fall through
    case eColorID__moz_menuhovertext:
      if (IsVistaOrLater() && IsAppThemed())
      {
        res = ::GetColorFromTheme(eUXMenu,
                                  MENU_POPUPITEM, MPI_HOT, TMT_TEXTCOLOR, aColor);
        if (NS_SUCCEEDED(res))
          return res;
        // fall through to highlight case
      }
    case eColorID_highlighttext:
    case eColorID__moz_html_cellhighlighttext:
      idx = COLOR_HIGHLIGHTTEXT;
      break;
    case eColorID_inactiveborder:
      idx = COLOR_INACTIVEBORDER;
      break;
    case eColorID_inactivecaption:
      idx = COLOR_INACTIVECAPTION;
      break;
    case eColorID_inactivecaptiontext:
      idx = COLOR_INACTIVECAPTIONTEXT;
      break;
    case eColorID_infobackground:
      idx = COLOR_INFOBK;
      break;
    case eColorID_infotext:
      idx = COLOR_INFOTEXT;
      break;
    case eColorID_menu:
      idx = COLOR_MENU;
      break;
    case eColorID_menutext:
    case eColorID__moz_menubartext:
      idx = COLOR_MENUTEXT;
      break;
    case eColorID_scrollbar:
      idx = COLOR_SCROLLBAR;
      break;
    case eColorID_threeddarkshadow:
      idx = COLOR_3DDKSHADOW;
      break;
    case eColorID_threedface:
      idx = COLOR_3DFACE;
      break;
    case eColorID_threedhighlight:
      idx = COLOR_3DHIGHLIGHT;
      break;
    case eColorID_threedlightshadow:
      idx = COLOR_3DLIGHT;
      break;
    case eColorID_threedshadow:
      idx = COLOR_3DSHADOW;
      break;
    case eColorID_window:
      idx = COLOR_WINDOW;
      break;
    case eColorID_windowframe:
      idx = COLOR_WINDOWFRAME;
      break;
    case eColorID_windowtext:
      idx = COLOR_WINDOWTEXT;
      break;
    case eColorID__moz_eventreerow:
    case eColorID__moz_oddtreerow:
    case eColorID__moz_field:
    case eColorID__moz_combobox:
      idx = COLOR_WINDOW;
      break;
    case eColorID__moz_fieldtext:
    case eColorID__moz_comboboxtext:
      idx = COLOR_WINDOWTEXT;
      break;
    case eColorID__moz_dialog:
    case eColorID__moz_cellhighlight:
      idx = COLOR_3DFACE;
      break;
    case eColorID__moz_win_mediatext:
      if (IsVistaOrLater() && IsAppThemed()) {
        res = ::GetColorFromTheme(eUXMediaToolbar,
                                  TP_BUTTON, TS_NORMAL, TMT_TEXTCOLOR, aColor);
        if (NS_SUCCEEDED(res))
          return res;
      }
      // if we've gotten here just return -moz-dialogtext instead
      idx = COLOR_WINDOWTEXT;
      break;
    case eColorID__moz_win_communicationstext:
      if (IsVistaOrLater() && IsAppThemed())
      {
        res = ::GetColorFromTheme(eUXCommunicationsToolbar,
                                  TP_BUTTON, TS_NORMAL, TMT_TEXTCOLOR, aColor);
        if (NS_SUCCEEDED(res))
          return res;
      }
      // if we've gotten here just return -moz-dialogtext instead
      idx = COLOR_WINDOWTEXT;
      break;
    case eColorID__moz_dialogtext:
    case eColorID__moz_cellhighlighttext:
      idx = COLOR_WINDOWTEXT;
      break;
    case eColorID__moz_dragtargetzone:
      idx = COLOR_HIGHLIGHTTEXT;
      break;
    case eColorID__moz_buttondefault:
      idx = COLOR_3DDKSHADOW;
      break;
    case eColorID__moz_nativehyperlinktext:
      idx = COLOR_HOTLIGHT;
      break;
    default:
      idx = COLOR_WINDOW;
      break;
    }

  DWORD color = ::GetSysColor(idx);
  aColor = COLOREF_2_NSRGB(color);

  return res;
}

nsresult
nsLookAndFeel::GetIntImpl(IntID aID, int32_t &aResult)
{
  nsresult res = nsXPLookAndFeel::GetIntImpl(aID, aResult);
  if (NS_SUCCEEDED(res))
    return res;
  res = NS_OK;

  switch (aID) {
    case eIntID_CaretBlinkTime:
        aResult = (int32_t)::GetCaretBlinkTime();
        break;
    case eIntID_CaretWidth:
        aResult = 1;
        break;
    case eIntID_ShowCaretDuringSelection:
        aResult = 0;
        break;
    case eIntID_SelectTextfieldsOnKeyFocus:
        // Select textfield content when focused by kbd
        // used by EventStateManager::sTextfieldSelectModel
        aResult = 1;
        break;
    case eIntID_SubmenuDelay:
        // This will default to the Windows' default
        // (400ms) on error.
        aResult = GetSystemParam(SPI_GETMENUSHOWDELAY, 400);
        break;
    case eIntID_TooltipDelay:
        aResult = 500;
        break;
    case eIntID_MenusCanOverlapOSBar:
        // we want XUL popups to be able to overlap the task bar.
        aResult = 1;
        break;
    case eIntID_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 eIntID_DragThresholdY:
        aResult = ::GetSystemMetrics(SM_CYDRAG) - 1;
        break;
    case eIntID_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.
        if (XRE_IsContentProcess()) {
          // If we're running in the content process, then the parent should
          // have sent us the accessibility state when nsLookAndFeel
          // initialized, and stashed it in the mUseAccessibilityTheme cache.
          aResult = mUseAccessibilityTheme;
        } else {
          // Otherwise, we can ask the OS to see if we're using High Contrast
          // mode.
          aResult = nsUXThemeData::IsHighContrastOn();
        }
        break;
    case eIntID_ScrollArrowStyle:
        aResult = eScrollArrowStyle_Single;
        break;
    case eIntID_ScrollSliderStyle:
        aResult = eScrollThumbStyle_Proportional;
        break;
    case eIntID_TreeOpenDelay:
        aResult = 1000;
        break;
    case eIntID_TreeCloseDelay:
        aResult = 0;
        break;
    case eIntID_TreeLazyScrollDelay:
        aResult = 150;
        break;
    case eIntID_TreeScrollDelay:
        aResult = 100;
        break;
    case eIntID_TreeScrollLinesMax:
        aResult = 3;
        break;
    case eIntID_WindowsClassic:
        aResult = !IsAppThemed();
        break;
    case eIntID_TouchEnabled:
        aResult = WinUtils::IsTouchDeviceSupportPresent();
        break;
    case eIntID_WindowsDefaultTheme:
        aResult = nsUXThemeData::IsDefaultWindowTheme();
        break;
    case eIntID_WindowsThemeIdentifier:
        aResult = nsUXThemeData::GetNativeThemeId();
        break;

    case eIntID_OperatingSystemVersionIdentifier:
    {
        aResult = GetOperatingSystemVersion();
        break;
    }

    case eIntID_MacGraphiteTheme:
        aResult = 0;
        res = NS_ERROR_NOT_IMPLEMENTED;
        break;
    case eIntID_DWMCompositor:
        aResult = nsUXThemeData::CheckForCompositor();
        break;
    case eIntID_WindowsGlass:
        // Aero Glass is only available prior to Windows 8 when DWM is used.
        aResult = (nsUXThemeData::CheckForCompositor() && !IsWin8OrLater());
        break;
    case eIntID_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;
                  // fall through for the right-to-left handling.
                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 eIntID_IMERawInputUnderlineStyle:
    case eIntID_IMEConvertedTextUnderlineStyle:
        aResult = NS_STYLE_TEXT_DECORATION_STYLE_DASHED;
        break;
    case eIntID_IMESelectedRawTextUnderlineStyle:
    case eIntID_IMESelectedConvertedTextUnderline:
        aResult = NS_STYLE_TEXT_DECORATION_STYLE_NONE;
        break;
    case eIntID_SpellCheckerUnderlineStyle:
        aResult = NS_STYLE_TEXT_DECORATION_STYLE_WAVY;
        break;
    case eIntID_ScrollbarButtonAutoRepeatBehavior:
        aResult = 0;
        break;
    case eIntID_SwipeAnimationEnabled:
        aResult = 0;
        break;
    case eIntID_ColorPickerAvailable:
        aResult = true;
        break;
    case eIntID_UseOverlayScrollbars:
        aResult = false;
        break;
    case eIntID_AllowOverlayScrollbarsOverlap:
        aResult = 0;
        break;
    case eIntID_ScrollbarDisplayOnMouseMove:
        aResult = 1;
        break;
    case eIntID_ScrollbarFadeBeginDelay:
        aResult = 2500;
        break;
    case eIntID_ScrollbarFadeDuration:
        aResult = 350;
        break;
    case eIntID_ContextMenuOffsetVertical:
    case eIntID_ContextMenuOffsetHorizontal:
        aResult = 2;
        break;
    default:
        aResult = 0;
        res = NS_ERROR_FAILURE;
    }
  return res;
}

nsresult
nsLookAndFeel::GetFloatImpl(FloatID aID, float &aResult)
{
  nsresult res = nsXPLookAndFeel::GetFloatImpl(aID, aResult);
  if (NS_SUCCEEDED(res))
    return res;
  res = NS_OK;

  switch (aID) {
    case eFloatID_IMEUnderlineRelativeSize:
        aResult = 1.0f;
        break;
    case eFloatID_SpellCheckerUnderlineRelativeSize:
        aResult = 1.0f;
        break;
    default:
        aResult = -1.0;
        res = NS_ERROR_FAILURE;
    }
  return res;
}

static bool
GetSysFontInfo(HDC aHDC, LookAndFeel::FontID anID,
               nsString &aFontName,
               gfxFontStyle &aFontStyle)
{
  LOGFONTW* ptrLogFont = nullptr;
  LOGFONTW logFont;
  NONCLIENTMETRICSW ncm;
  char16_t name[LF_FACESIZE];
  bool useShellDlg = false;

  // Depending on which stock font we want, there are a couple of
  // places we might have to look it up.
  switch (anID) {
  case LookAndFeel::eFont_Icon:
    if (!::SystemParametersInfoW(SPI_GETICONTITLELOGFONT,
                                 sizeof(logFont), (PVOID)&logFont, 0))
      return false;

    ptrLogFont = &logFont;
    break;

  default:
    ncm.cbSize = sizeof(NONCLIENTMETRICSW);
    if (!::SystemParametersInfoW(SPI_GETNONCLIENTMETRICS,
                                 sizeof(ncm), (PVOID)&ncm, 0))
      return false;

    switch (anID) {
    case LookAndFeel::eFont_Menu:
    case LookAndFeel::eFont_PullDownMenu:
      ptrLogFont = &ncm.lfMenuFont;
      break;
    case LookAndFeel::eFont_Caption:
      ptrLogFont = &ncm.lfCaptionFont;
      break;
    case LookAndFeel::eFont_SmallCaption:
      ptrLogFont = &ncm.lfSmCaptionFont;
      break;
    case LookAndFeel::eFont_StatusBar:
    case LookAndFeel::eFont_Tooltips:
      ptrLogFont = &ncm.lfStatusFont;
      break;
    case LookAndFeel::eFont_Widget:
    case LookAndFeel::eFont_Dialog:
    case LookAndFeel::eFont_Button:
    case LookAndFeel::eFont_Field:
    case LookAndFeel::eFont_List:
      // 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.
      useShellDlg = true;
      // Fall through so that we can get size from lfMessageFont;
      // but later we'll use the (virtual) "MS Shell Dlg 2" font name
      // instead of the LOGFONT's.
    default:
      ptrLogFont = &ncm.lfMessageFont;
      break;
    }
    break;
  }

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

  // 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 = -ptrLogFont->lfHeight;
  if (pixelHeight < 0) {
    HFONT hFont = ::CreateFontIndirectW(ptrLogFont);
    if (!hFont)
      return false;
    HGDIOBJ hObject = ::SelectObject(aHDC, hFont);
    TEXTMETRIC tm;
    ::GetTextMetrics(aHDC, &tm);
    ::SelectObject(aHDC, hObject);
    ::DeleteObject(hFont);
    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;

  aFontStyle.size = pixelHeight;

  // FIXME: What about oblique?
  aFontStyle.style =
    (ptrLogFont->lfItalic) ? NS_FONT_STYLE_ITALIC : NS_FONT_STYLE_NORMAL;

  // FIXME: Other weights?
  aFontStyle.weight =
    (ptrLogFont->lfWeight == FW_BOLD ?
        NS_FONT_WEIGHT_BOLD : NS_FONT_WEIGHT_NORMAL);

  // FIXME: Set aFontStyle->stretch correctly!
  aFontStyle.stretch = NS_FONT_STRETCH_NORMAL;

  aFontStyle.systemFont = true;

  if (useShellDlg) {
    aFontName = NS_LITERAL_STRING("MS Shell Dlg 2");
  } else {
    memcpy(name, ptrLogFont->lfFaceName, LF_FACESIZE*sizeof(char16_t));
    aFontName = name;
  }

  return true;
}

bool
nsLookAndFeel::GetFontImpl(FontID anID, nsString &aFontName,
                           gfxFontStyle &aFontStyle,
                           float aDevPixPerCSSPixel)
{
  HDC tdc = GetDC(nullptr);
  bool status = GetSysFontInfo(tdc, anID, aFontName, aFontStyle);
  ReleaseDC(nullptr, tdc);
  // now convert the logical font size from GetSysFontInfo into device pixels for layout
  aFontStyle.size *= aDevPixPerCSSPixel;
  return status;
}

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

nsTArray<LookAndFeelInt>
nsLookAndFeel::GetIntCacheImpl()
{
  nsTArray<LookAndFeelInt> lookAndFeelIntCache =
    nsXPLookAndFeel::GetIntCacheImpl();

  LookAndFeelInt useAccessibilityTheme;
  useAccessibilityTheme.id = eIntID_UseAccessibilityTheme;
  useAccessibilityTheme.value = GetInt(eIntID_UseAccessibilityTheme);
  lookAndFeelIntCache.AppendElement(useAccessibilityTheme);

  return lookAndFeelIntCache;
}

void
nsLookAndFeel::SetIntCacheImpl(const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache)
{
  for (auto entry : aLookAndFeelIntCache) {
    if (entry.id == eIntID_UseAccessibilityTheme) {
      mUseAccessibilityTheme = entry.value;
      break;
    }
  }
}