src/ui/native_theme/native_theme_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/native_theme/native_theme_win.h"
   6
   7 #include <windows.h>
   8 #include <uxtheme.h>
   9 #include <vsstyle.h>
  10 #include <vssym32.h>
  11
  12 #include "base/basictypes.h"
  13 #include "base/logging.h"
  14 #include "base/memory/scoped_handle.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/win/scoped_gdi_object.h"
  17 #include "base/win/scoped_hdc.h"
  18 #include "base/win/scoped_select_object.h"
  19 #include "base/win/windows_version.h"
  20 #include "skia/ext/bitmap_platform_device.h"
  21 #include "skia/ext/platform_canvas.h"
  22 #include "skia/ext/skia_utils_win.h"
  23 #include "third_party/skia/include/core/SkCanvas.h"
  24 #include "third_party/skia/include/core/SkColorPriv.h"
  25 #include "third_party/skia/include/core/SkShader.h"
  26 #include "ui/gfx/color_utils.h"
  27 #include "ui/gfx/gdi_util.h"
  28 #include "ui/gfx/rect.h"
  29 #include "ui/gfx/rect_conversions.h"
  30 #include "ui/gfx/win/dpi.h"
  31 #include "ui/native_theme/common_theme.h"
  32
  33 // This was removed from Winvers.h but is still used.
  34 #if !defined(COLOR_MENUHIGHLIGHT)
  35 #define COLOR_MENUHIGHLIGHT 29
  36 #endif
  37
  38 namespace {
  39
  40 // TODO: Obtain the correct colors using GetSysColor.
  41 // Theme colors returned by GetSystemColor().
  42 const SkColor kInvalidColorIdColor = SkColorSetRGB(255, 0, 128);
  43 // Dialogs:
  44 const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
  45 // FocusableBorder:
  46 const SkColor kFocusedBorderColor = SkColorSetRGB(0x4d, 0x90, 0xfe);
  47 const SkColor kUnfocusedBorderColor = SkColorSetRGB(0xd9, 0xd9, 0xd9);
  48 // Button:
  49 const SkColor kButtonBackgroundColor = SkColorSetRGB(0xde, 0xde, 0xde);
  50 const SkColor kButtonHighlightColor = SkColorSetARGB(200, 255, 255, 255);
  51 const SkColor kButtonHoverColor = SkColorSetRGB(6, 45, 117);
  52 const SkColor kButtonHoverBackgroundColor = SkColorSetRGB(0xEA, 0xEA, 0xEA);
  53 // MenuItem:
  54 const SkColor kEnabledMenuItemForegroundColor = SkColorSetRGB(6, 45, 117);
  55 const SkColor kDisabledMenuItemForegroundColor = SkColorSetRGB(161, 161, 146);
  56 const SkColor kFocusedMenuItemBackgroundColor = SkColorSetRGB(246, 249, 253);
  57 const SkColor kMenuSeparatorColor = SkColorSetARGB(50, 0, 0, 0);
  58 // Table:
  59 const SkColor kTreeSelectionBackgroundUnfocused = SkColorSetRGB(240, 240, 240);
  60
  61 // Windows system color IDs cached and updated by the native theme.
  62 const int kSystemColors[] = {
  63   COLOR_3DFACE,
  64   COLOR_BTNTEXT,
  65   COLOR_GRAYTEXT,
  66   COLOR_HIGHLIGHT,
  67   COLOR_HIGHLIGHTTEXT,
  68   COLOR_SCROLLBAR,
  69   COLOR_WINDOW,
  70   COLOR_WINDOWTEXT,
  71   COLOR_BTNFACE,
  72   COLOR_MENUHIGHLIGHT,
  73 };
  74
  75 void SetCheckerboardShader(SkPaint* paint, const RECT& align_rect) {
  76   // Create a 2x2 checkerboard pattern using the 3D face and highlight colors.
  77   const SkColor face = color_utils::GetSysSkColor(COLOR_3DFACE);
  78   const SkColor highlight = color_utils::GetSysSkColor(COLOR_3DHILIGHT);
  79   SkColor buffer[] = { face, highlight, highlight, face };
  80   // Confusing bit: we first create a temporary bitmap with our desired pattern,
  81   // then copy it to another bitmap.  The temporary bitmap doesn't take
  82   // ownership of the pixel data, and so will point to garbage when this
  83   // function returns.  The copy will copy the pixel data into a place owned by
  84   // the bitmap, which is in turn owned by the shader, etc., so it will live
  85   // until we're done using it.
  86   SkBitmap temp_bitmap;
  87   temp_bitmap.setConfig(SkBitmap::kARGB_8888_Config, 2, 2);
  88   temp_bitmap.setPixels(buffer);
  89   SkBitmap bitmap;
  90   temp_bitmap.copyTo(&bitmap);
  91   skia::RefPtr<SkShader> shader = skia::AdoptRef(
  92       SkShader::CreateBitmapShader(
  93           bitmap, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
  94
  95   // Align the pattern with the upper corner of |align_rect|.
  96   SkMatrix matrix;
  97   matrix.setTranslate(SkIntToScalar(align_rect.left),
  98                       SkIntToScalar(align_rect.top));
  99   shader->setLocalMatrix(matrix);
 100   paint->setShader(shader.get());
 101 }
 102
 103 //    <-a->
 104 // [  *****             ]
 105 //  ____ |              |
 106 //  <-a-> <------b----->
 107 // a: object_width
 108 // b: frame_width
 109 // *: animating object
 110 //
 111 // - the animation goes from "[" to "]" repeatedly.
 112 // - the animation offset is at first "|"
 113 //
 114 int ComputeAnimationProgress(int frame_width,
 115                              int object_width,
 116                              int pixels_per_second,
 117                              double animated_seconds) {
 118   int animation_width = frame_width + object_width;
 119   double interval = static_cast<double>(animation_width) / pixels_per_second;
 120   double ratio = fmod(animated_seconds, interval) / interval;
 121   return static_cast<int>(animation_width * ratio) - object_width;
 122 }
 123
 124 RECT InsetRect(const RECT* rect, int size) {
 125   gfx::Rect result(*rect);
 126   result.Inset(size, size);
 127   return result.ToRECT();
 128 }
 129
 130 }  // namespace
 131
 132 namespace ui {
 133
 134 bool NativeThemeWin::IsThemingActive() const {
 135   if (is_theme_active_)
 136     return !!is_theme_active_();
 137   return false;
 138 }
 139
 140 bool NativeThemeWin::IsUsingHighContrastTheme() const {
 141   if (is_using_high_contrast_valid_)
 142     return is_using_high_contrast_;
 143   HIGHCONTRAST result;
 144   result.cbSize = sizeof(HIGHCONTRAST);
 145   is_using_high_contrast_ =
 146       SystemParametersInfo(SPI_GETHIGHCONTRAST, result.cbSize, &result, 0) &&
 147       (result.dwFlags & HCF_HIGHCONTRASTON) == HCF_HIGHCONTRASTON;
 148   is_using_high_contrast_valid_ = true;
 149   return is_using_high_contrast_;
 150 }
 151
 152 HRESULT NativeThemeWin::GetThemeColor(ThemeName theme,
 153                                       int part_id,
 154                                       int state_id,
 155                                       int prop_id,
 156                                       SkColor* color) const {
 157   HANDLE handle = GetThemeHandle(theme);
 158   if (handle && get_theme_color_) {
 159     COLORREF color_ref;
 160     if (get_theme_color_(handle, part_id, state_id, prop_id, &color_ref) ==
 161         S_OK) {
 162       *color = skia::COLORREFToSkColor(color_ref);
 163       return S_OK;
 164     }
 165   }
 166   return E_NOTIMPL;
 167 }
 168
 169 SkColor NativeThemeWin::GetThemeColorWithDefault(ThemeName theme,
 170                                                  int part_id,
 171                                                  int state_id,
 172                                                  int prop_id,
 173                                                  int default_sys_color) const {
 174   SkColor color;
 175   if (GetThemeColor(theme, part_id, state_id, prop_id, &color) != S_OK)
 176     color = color_utils::GetSysSkColor(default_sys_color);
 177   return color;
 178 }
 179
 180 gfx::Size NativeThemeWin::GetThemeBorderSize(ThemeName theme) const {
 181   // For simplicity use the wildcard state==0, part==0, since it works
 182   // for the cases we currently depend on.
 183   int border;
 184   if (GetThemeInt(theme, 0, 0, TMT_BORDERSIZE, &border) == S_OK)
 185     return gfx::Size(border, border);
 186   else
 187     return gfx::Size(GetSystemMetrics(SM_CXEDGE), GetSystemMetrics(SM_CYEDGE));
 188 }
 189
 190 void NativeThemeWin::DisableTheming() const {
 191   if (!set_theme_properties_)
 192     return;
 193   set_theme_properties_(0);
 194 }
 195
 196 void NativeThemeWin::CloseHandles() const {
 197   if (!close_theme_)
 198     return;
 199
 200   for (int i = 0; i < LAST; ++i) {
 201     if (theme_handles_[i]) {
 202       close_theme_(theme_handles_[i]);
 203       theme_handles_[i] = NULL;
 204     }
 205   }
 206 }
 207
 208 bool NativeThemeWin::IsClassicTheme(ThemeName name) const {
 209   if (!theme_dll_)
 210     return true;
 211
 212   return !GetThemeHandle(name);
 213 }
 214
 215 // static
 216 NativeThemeWin* NativeThemeWin::instance() {
 217   CR_DEFINE_STATIC_LOCAL(NativeThemeWin, s_native_theme, ());
 218   return &s_native_theme;
 219 }
 220
 221 gfx::Size NativeThemeWin::GetPartSize(Part part,
 222                                       State state,
 223                                       const ExtraParams& extra) const {
 224   gfx::Size part_size = CommonThemeGetPartSize(part, state, extra);
 225   if (!part_size.IsEmpty())
 226     return part_size;
 227
 228   // The GetThemePartSize call below returns the default size without
 229   // accounting for user customization (crbug/218291).
 230   switch (part) {
 231     case kScrollbarDownArrow:
 232     case kScrollbarLeftArrow:
 233     case kScrollbarRightArrow:
 234     case kScrollbarUpArrow:
 235     case kScrollbarHorizontalThumb:
 236     case kScrollbarVerticalThumb:
 237     case kScrollbarHorizontalTrack:
 238     case kScrollbarVerticalTrack: {
 239       int size = gfx::win::GetSystemMetricsInDIP(SM_CXVSCROLL);
 240       if (size == 0)
 241         size = 17;
 242       return gfx::Size(size, size);
 243     }
 244   }
 245
 246   int part_id = GetWindowsPart(part, state, extra);
 247   int state_id = GetWindowsState(part, state, extra);
 248
 249   SIZE size;
 250   HDC hdc = GetDC(NULL);
 251   HRESULT hr = GetThemePartSize(GetThemeName(part), hdc, part_id, state_id,
 252                                 NULL, TS_TRUE, &size);
 253   ReleaseDC(NULL, hdc);
 254
 255   if (FAILED(hr)) {
 256     // TODO(rogerta): For now, we need to support radio buttons and checkboxes
 257     // when theming is not enabled.  Support for other parts can be added
 258     // if/when needed.
 259     switch (part) {
 260       case kCheckbox:
 261       case kRadio:
 262         // TODO(rogerta): I was not able to find any API to get the default
 263         // size of these controls, so determined these values empirically.
 264         size.cx = 13;
 265         size.cy = 13;
 266         break;
 267       default:
 268         size.cx = 0;
 269         size.cy = 0;
 270         break;
 271     }
 272   }
 273
 274   return gfx::Size(size.cx, size.cy);
 275 }
 276
 277 void NativeThemeWin::Paint(SkCanvas* canvas,
 278                            Part part,
 279                            State state,
 280                            const gfx::Rect& rect,
 281                            const ExtraParams& extra) const {
 282   if (rect.IsEmpty())
 283     return;
 284
 285   switch (part) {
 286     case kMenuPopupGutter:
 287       CommonThemePaintMenuGutter(canvas, rect);
 288       return;
 289     case kMenuPopupSeparator:
 290       CommonThemePaintMenuSeparator(canvas, rect, extra.menu_separator);
 291       return;
 292     case kMenuPopupBackground:
 293       CommonThemePaintMenuBackground(canvas, rect);
 294       return;
 295     case kMenuItemBackground:
 296       CommonThemePaintMenuItemBackground(canvas, state, rect);
 297       return;
 298   }
 299
 300   bool needs_paint_indirect = false;
 301   if (!skia::SupportsPlatformPaint(canvas)) {
 302     // This block will only get hit with --enable-accelerated-drawing flag.
 303     needs_paint_indirect = true;
 304   } else {
 305     // Scrollbar components on Windows Classic theme (on all Windows versions)
 306     // have particularly problematic alpha values, so always draw them
 307     // indirectly. In addition, scrollbar thumbs and grippers for the Windows XP
 308     // theme (available only on Windows XP) also need their alpha values
 309     // fixed.
 310     switch (part) {
 311       case kScrollbarDownArrow:
 312       case kScrollbarUpArrow:
 313       case kScrollbarLeftArrow:
 314       case kScrollbarRightArrow:
 315         if (!GetThemeHandle(SCROLLBAR))
 316           needs_paint_indirect = true;
 317         break;
 318       case kScrollbarHorizontalThumb:
 319       case kScrollbarVerticalThumb:
 320       case kScrollbarHorizontalGripper:
 321       case kScrollbarVerticalGripper:
 322         if (!GetThemeHandle(SCROLLBAR) ||
 323             base::win::GetVersion() == base::win::VERSION_XP)
 324           needs_paint_indirect = true;
 325         break;
 326       default:
 327         break;
 328     }
 329   }
 330
 331   if (needs_paint_indirect)
 332     PaintIndirect(canvas, part, state, rect, extra);
 333   else
 334     PaintDirect(canvas, part, state, rect, extra);
 335 }
 336
 337 NativeThemeWin::NativeThemeWin()
 338     : theme_dll_(LoadLibrary(L"uxtheme.dll")),
 339       draw_theme_(NULL),
 340       draw_theme_ex_(NULL),
 341       get_theme_color_(NULL),
 342       get_theme_content_rect_(NULL),
 343       get_theme_part_size_(NULL),
 344       open_theme_(NULL),
 345       close_theme_(NULL),
 346       set_theme_properties_(NULL),
 347       is_theme_active_(NULL),
 348       get_theme_int_(NULL),
 349       color_change_listener_(this),
 350       is_using_high_contrast_(false),
 351       is_using_high_contrast_valid_(false) {
 352   if (theme_dll_) {
 353     draw_theme_ = reinterpret_cast<DrawThemeBackgroundPtr>(
 354         GetProcAddress(theme_dll_, "DrawThemeBackground"));
 355     draw_theme_ex_ = reinterpret_cast<DrawThemeBackgroundExPtr>(
 356         GetProcAddress(theme_dll_, "DrawThemeBackgroundEx"));
 357     get_theme_color_ = reinterpret_cast<GetThemeColorPtr>(
 358         GetProcAddress(theme_dll_, "GetThemeColor"));
 359     get_theme_content_rect_ = reinterpret_cast<GetThemeContentRectPtr>(
 360         GetProcAddress(theme_dll_, "GetThemeBackgroundContentRect"));
 361     get_theme_part_size_ = reinterpret_cast<GetThemePartSizePtr>(
 362         GetProcAddress(theme_dll_, "GetThemePartSize"));
 363     open_theme_ = reinterpret_cast<OpenThemeDataPtr>(
 364         GetProcAddress(theme_dll_, "OpenThemeData"));
 365     close_theme_ = reinterpret_cast<CloseThemeDataPtr>(
 366         GetProcAddress(theme_dll_, "CloseThemeData"));
 367     set_theme_properties_ = reinterpret_cast<SetThemeAppPropertiesPtr>(
 368         GetProcAddress(theme_dll_, "SetThemeAppProperties"));
 369     is_theme_active_ = reinterpret_cast<IsThemeActivePtr>(
 370         GetProcAddress(theme_dll_, "IsThemeActive"));
 371     get_theme_int_ = reinterpret_cast<GetThemeIntPtr>(
 372         GetProcAddress(theme_dll_, "GetThemeInt"));
 373   }
 374   memset(theme_handles_, 0, sizeof(theme_handles_));
 375
 376   // Initialize the cached system colors.
 377   UpdateSystemColors();
 378 }
 379
 380 NativeThemeWin::~NativeThemeWin() {
 381   if (theme_dll_) {
 382     // todo (cpu): fix this soon.  Making a call to CloseHandles() here breaks
 383     // certain tests and the reliability bots.
 384     // CloseHandles();
 385     FreeLibrary(theme_dll_);
 386   }
 387 }
 388
 389 void NativeThemeWin::OnSysColorChange() {
 390   UpdateSystemColors();
 391   is_using_high_contrast_valid_ = false;
 392   NotifyObservers();
 393 }
 394
 395 void NativeThemeWin::UpdateSystemColors() {
 396   for (int i = 0; i < arraysize(kSystemColors); ++i) {
 397     system_colors_[kSystemColors[i]] =
 398         color_utils::GetSysSkColor(kSystemColors[i]);
 399   }
 400 }
 401
 402 void NativeThemeWin::PaintDirect(SkCanvas* canvas,
 403                                  Part part,
 404                                  State state,
 405                                  const gfx::Rect& rect,
 406                                  const ExtraParams& extra) const {
 407   skia::ScopedPlatformPaint scoped_platform_paint(canvas);
 408   HDC hdc = scoped_platform_paint.GetPlatformSurface();
 409
 410   switch (part) {
 411     case kCheckbox:
 412       PaintCheckbox(hdc, part, state, rect, extra.button);
 413       break;
 414     case kRadio:
 415       PaintRadioButton(hdc, part, state, rect, extra.button);
 416       break;
 417     case kPushButton:
 418       PaintPushButton(hdc, part, state, rect, extra.button);
 419       break;
 420     case kMenuPopupArrow:
 421       PaintMenuArrow(hdc, state, rect, extra.menu_arrow);
 422       break;
 423     case kMenuPopupGutter:
 424       PaintMenuGutter(hdc, rect);
 425       break;
 426     case kMenuPopupSeparator:
 427       PaintMenuSeparator(hdc, rect, extra.menu_separator);
 428       break;
 429     case kMenuPopupBackground:
 430       PaintMenuBackground(hdc, rect);
 431       break;
 432     case kMenuCheck:
 433       PaintMenuCheck(hdc, state, rect, extra.menu_check);
 434       break;
 435     case kMenuCheckBackground:
 436       PaintMenuCheckBackground(hdc, state, rect);
 437       break;
 438     case kMenuItemBackground:
 439       PaintMenuItemBackground(hdc, state, rect, extra.menu_item);
 440       break;
 441     case kMenuList:
 442       PaintMenuList(hdc, state, rect, extra.menu_list);
 443       break;
 444     case kScrollbarDownArrow:
 445     case kScrollbarUpArrow:
 446     case kScrollbarLeftArrow:
 447     case kScrollbarRightArrow:
 448       PaintScrollbarArrow(hdc, part, state, rect, extra.scrollbar_arrow);
 449       break;
 450     case kScrollbarHorizontalTrack:
 451     case kScrollbarVerticalTrack:
 452       PaintScrollbarTrack(canvas, hdc, part, state, rect,
 453                           extra.scrollbar_track);
 454       break;
 455     case kScrollbarCorner:
 456       canvas->drawColor(SK_ColorWHITE, SkXfermode::kSrc_Mode);
 457       break;
 458     case kScrollbarHorizontalThumb:
 459     case kScrollbarVerticalThumb:
 460     case kScrollbarHorizontalGripper:
 461     case kScrollbarVerticalGripper:
 462       PaintScrollbarThumb(hdc, part, state, rect, extra.scrollbar_thumb);
 463       break;
 464     case kInnerSpinButton:
 465       PaintSpinButton(hdc, part, state, rect, extra.inner_spin);
 466       break;
 467     case kTrackbarThumb:
 468     case kTrackbarTrack:
 469       PaintTrackbar(canvas, hdc, part, state, rect, extra.trackbar);
 470       break;
 471     case kProgressBar:
 472       PaintProgressBar(hdc, rect, extra.progress_bar);
 473       break;
 474     case kWindowResizeGripper:
 475       PaintWindowResizeGripper(hdc, rect);
 476       break;
 477     case kTabPanelBackground:
 478       PaintTabPanelBackground(hdc, rect);
 479       break;
 480     case kTextField:
 481       PaintTextField(hdc, part, state, rect, extra.text_field);
 482       break;
 483
 484     case kSliderTrack:
 485     case kSliderThumb:
 486     default:
 487       // While transitioning NativeThemeWin to the single Paint() entry point,
 488       // unsupported parts will DCHECK here.
 489       NOTREACHED();
 490   }
 491 }
 492
 493 SkColor NativeThemeWin::GetSystemColor(ColorId color_id) const {
 494   SkColor color;
 495   if (CommonThemeGetSystemColor(color_id, &color))
 496     return color;
 497
 498   switch (color_id) {
 499     // Windows
 500     case kColorId_WindowBackground:
 501       return system_colors_[COLOR_WINDOW];
 502
 503     // Dialogs
 504     case kColorId_DialogBackground:
 505       if (gfx::IsInvertedColorScheme())
 506         return color_utils::InvertColor(kDialogBackgroundColor);
 507       return kDialogBackgroundColor;
 508
 509     // FocusableBorder
 510     case kColorId_FocusedBorderColor:
 511       return kFocusedBorderColor;
 512     case kColorId_UnfocusedBorderColor:
 513       return kUnfocusedBorderColor;
 514
 515     // Button
 516     case kColorId_ButtonBackgroundColor:
 517       return kButtonBackgroundColor;
 518     case kColorId_ButtonEnabledColor:
 519       return system_colors_[COLOR_BTNTEXT];
 520     case kColorId_ButtonDisabledColor:
 521       return system_colors_[COLOR_GRAYTEXT];
 522     case kColorId_ButtonHighlightColor:
 523       return kButtonHighlightColor;
 524     case kColorId_ButtonHoverColor:
 525       return kButtonHoverColor;
 526     case kColorId_ButtonHoverBackgroundColor:
 527       return kButtonHoverBackgroundColor;
 528
 529     // MenuItem
 530     case kColorId_EnabledMenuItemForegroundColor:
 531       return kEnabledMenuItemForegroundColor;
 532     case kColorId_DisabledMenuItemForegroundColor:
 533       return kDisabledMenuItemForegroundColor;
 534     case kColorId_DisabledEmphasizedMenuItemForegroundColor:
 535       return SK_ColorBLACK;
 536     case kColorId_FocusedMenuItemBackgroundColor:
 537       return kFocusedMenuItemBackgroundColor;
 538     case kColorId_MenuSeparatorColor:
 539       return kMenuSeparatorColor;
 540
 541     // Label
 542     case kColorId_LabelEnabledColor:
 543       return system_colors_[COLOR_BTNTEXT];
 544     case kColorId_LabelDisabledColor:
 545       return system_colors_[COLOR_GRAYTEXT];
 546     case kColorId_LabelBackgroundColor:
 547       return system_colors_[COLOR_WINDOW];
 548
 549     // Textfield
 550     case kColorId_TextfieldDefaultColor:
 551       return system_colors_[COLOR_WINDOWTEXT];
 552     case kColorId_TextfieldDefaultBackground:
 553       return system_colors_[COLOR_WINDOW];
 554     case kColorId_TextfieldReadOnlyColor:
 555       return system_colors_[COLOR_GRAYTEXT];
 556     case kColorId_TextfieldReadOnlyBackground:
 557       return system_colors_[COLOR_3DFACE];
 558     case kColorId_TextfieldSelectionColor:
 559       return system_colors_[COLOR_HIGHLIGHTTEXT];
 560     case kColorId_TextfieldSelectionBackgroundFocused:
 561       return system_colors_[COLOR_HIGHLIGHT];
 562
 563     // Tree
 564     // NOTE: these aren't right for all themes, but as close as I could get.
 565     case kColorId_TreeBackground:
 566       return system_colors_[COLOR_WINDOW];
 567     case kColorId_TreeText:
 568       return system_colors_[COLOR_WINDOWTEXT];
 569     case kColorId_TreeSelectedText:
 570       return system_colors_[COLOR_HIGHLIGHTTEXT];
 571     case kColorId_TreeSelectedTextUnfocused:
 572       return system_colors_[COLOR_BTNTEXT];
 573     case kColorId_TreeSelectionBackgroundFocused:
 574       return system_colors_[COLOR_HIGHLIGHT];
 575     case kColorId_TreeSelectionBackgroundUnfocused:
 576       return system_colors_[IsUsingHighContrastTheme() ?
 577                               COLOR_MENUHIGHLIGHT : COLOR_BTNFACE];
 578     case kColorId_TreeArrow:
 579       return system_colors_[COLOR_WINDOWTEXT];
 580
 581     // Table
 582     case kColorId_TableBackground:
 583       return system_colors_[COLOR_WINDOW];
 584     case kColorId_TableText:
 585       return system_colors_[COLOR_WINDOWTEXT];
 586     case kColorId_TableSelectedText:
 587       return system_colors_[COLOR_HIGHLIGHTTEXT];
 588     case kColorId_TableSelectedTextUnfocused:
 589       return system_colors_[COLOR_BTNTEXT];
 590     case kColorId_TableSelectionBackgroundFocused:
 591       return system_colors_[COLOR_HIGHLIGHT];
 592     case kColorId_TableSelectionBackgroundUnfocused:
 593       return system_colors_[IsUsingHighContrastTheme() ?
 594                               COLOR_MENUHIGHLIGHT : COLOR_BTNFACE];
 595     case kColorId_TableGroupingIndicatorColor:
 596       return system_colors_[COLOR_GRAYTEXT];
 597
 598     // Results Tables
 599     case kColorId_ResultsTableNormalBackground:
 600       return system_colors_[COLOR_WINDOW];
 601     case kColorId_ResultsTableHoveredBackground:
 602       return color_utils::AlphaBlend(system_colors_[COLOR_HIGHLIGHT],
 603                                      system_colors_[COLOR_WINDOW], 0x40);
 604     case kColorId_ResultsTableSelectedBackground:
 605       return system_colors_[COLOR_HIGHLIGHT];
 606     case kColorId_ResultsTableNormalText:
 607     case kColorId_ResultsTableHoveredText:
 608       return system_colors_[COLOR_WINDOWTEXT];
 609     case kColorId_ResultsTableSelectedText:
 610       return system_colors_[COLOR_HIGHLIGHTTEXT];
 611     case kColorId_ResultsTableNormalDimmedText:
 612       return color_utils::AlphaBlend(system_colors_[COLOR_WINDOWTEXT],
 613                                      system_colors_[COLOR_WINDOW], 0x80);
 614     case kColorId_ResultsTableHoveredDimmedText:
 615       return color_utils::AlphaBlend(
 616           system_colors_[COLOR_WINDOWTEXT],
 617           GetSystemColor(kColorId_ResultsTableHoveredBackground), 0x80);
 618     case kColorId_ResultsTableSelectedDimmedText:
 619       return color_utils::AlphaBlend(system_colors_[COLOR_HIGHLIGHTTEXT],
 620                                      system_colors_[COLOR_HIGHLIGHT], 0x80);
 621     case kColorId_ResultsTableNormalUrl:
 622       return color_utils::GetReadableColor(SkColorSetRGB(0, 128, 0),
 623                                            system_colors_[COLOR_WINDOW]);
 624     case kColorId_ResultsTableHoveredUrl:
 625       return color_utils::GetReadableColor(
 626           SkColorSetRGB(0, 128, 0),
 627           GetSystemColor(kColorId_ResultsTableHoveredBackground));
 628     case kColorId_ResultsTableSelectedUrl:
 629       return color_utils::GetReadableColor(SkColorSetRGB(0, 128, 0),
 630                                            system_colors_[COLOR_HIGHLIGHT]);
 631     case kColorId_ResultsTableNormalDivider:
 632       return color_utils::AlphaBlend(system_colors_[COLOR_WINDOWTEXT],
 633                                      system_colors_[COLOR_WINDOW], 0x34);
 634     case kColorId_ResultsTableHoveredDivider:
 635       return color_utils::AlphaBlend(
 636           system_colors_[COLOR_WINDOWTEXT],
 637           GetSystemColor(kColorId_ResultsTableHoveredBackground), 0x34);
 638     case kColorId_ResultsTableSelectedDivider:
 639       return color_utils::AlphaBlend(system_colors_[COLOR_HIGHLIGHTTEXT],
 640                                      system_colors_[COLOR_HIGHLIGHT], 0x34);
 641
 642     default:
 643       NOTREACHED();
 644       break;
 645   }
 646   return kInvalidColorIdColor;
 647 }
 648
 649 void NativeThemeWin::PaintIndirect(SkCanvas* canvas,
 650                                    Part part,
 651                                    State state,
 652                                    const gfx::Rect& rect,
 653                                    const ExtraParams& extra) const {
 654   // TODO(asvitkine): This path is pretty inefficient - for each paint operation
 655   //                  it creates a new offscreen bitmap Skia canvas. This can
 656   //                  be sped up by doing it only once per part/state and
 657   //                  keeping a cache of the resulting bitmaps.
 658
 659   // Create an offscreen canvas that is backed by an HDC.
 660   skia::RefPtr<skia::BitmapPlatformDevice> device = skia::AdoptRef(
 661       skia::BitmapPlatformDevice::Create(
 662           rect.width(), rect.height(), false, NULL));
 663   DCHECK(device);
 664   if (!device)
 665     return;
 666   SkCanvas offscreen_canvas(device.get());
 667   DCHECK(skia::SupportsPlatformPaint(&offscreen_canvas));
 668
 669   // Some of the Windows theme drawing operations do not write correct alpha
 670   // values for fully-opaque pixels; instead the pixels get alpha 0. This is
 671   // especially a problem on Windows XP or when using the Classic theme.
 672   //
 673   // To work-around this, mark all pixels with a placeholder value, to detect
 674   // which pixels get touched by the paint operation. After paint, set any
 675   // pixels that have alpha 0 to opaque and placeholders to fully-transparent.
 676   const SkColor placeholder = SkColorSetARGB(1, 0, 0, 0);
 677   offscreen_canvas.clear(placeholder);
 678
 679   // Offset destination rects to have origin (0,0).
 680   gfx::Rect adjusted_rect(rect.size());
 681   ExtraParams adjusted_extra(extra);
 682   switch (part) {
 683     case kProgressBar:
 684       adjusted_extra.progress_bar.value_rect_x = 0;
 685       adjusted_extra.progress_bar.value_rect_y = 0;
 686       break;
 687     case kScrollbarHorizontalTrack:
 688     case kScrollbarVerticalTrack:
 689       adjusted_extra.scrollbar_track.track_x = 0;
 690       adjusted_extra.scrollbar_track.track_y = 0;
 691       break;
 692     default: break;
 693   }
 694   // Draw the theme controls using existing HDC-drawing code.
 695   PaintDirect(&offscreen_canvas,
 696               part,
 697               state,
 698               adjusted_rect,
 699               adjusted_extra);
 700
 701   // Copy the pixels to a bitmap that has ref-counted pixel storage, which is
 702   // necessary to have when drawing to a SkPicture.
 703   const SkBitmap& hdc_bitmap =
 704       offscreen_canvas.getDevice()->accessBitmap(false);
 705   SkBitmap bitmap;
 706   hdc_bitmap.copyTo(&bitmap, kPMColor_SkColorType);
 707
 708   // Post-process the pixels to fix up the alpha values (see big comment above).
 709   const SkPMColor placeholder_value = SkPreMultiplyColor(placeholder);
 710   const int pixel_count = rect.width() * rect.height();
 711   SkPMColor* pixels = bitmap.getAddr32(0, 0);
 712   for (int i = 0; i < pixel_count; i++) {
 713     if (pixels[i] == placeholder_value) {
 714       // Pixel wasn't touched - make it fully transparent.
 715       pixels[i] = SkPackARGB32(0, 0, 0, 0);
 716     } else if (SkGetPackedA32(pixels[i]) == 0) {
 717       // Pixel was touched but has incorrect alpha of 0, make it fully opaque.
 718       pixels[i] = SkPackARGB32(0xFF,
 719                                SkGetPackedR32(pixels[i]),
 720                                SkGetPackedG32(pixels[i]),
 721                                SkGetPackedB32(pixels[i]));
 722     }
 723   }
 724
 725   // Draw the offscreen bitmap to the destination canvas.
 726   canvas->drawBitmap(bitmap, rect.x(), rect.y());
 727 }
 728
 729 HRESULT NativeThemeWin::GetThemePartSize(ThemeName theme_name,
 730                                          HDC hdc,
 731                                          int part_id,
 732                                          int state_id,
 733                                          RECT* rect,
 734                                          int ts,
 735                                          SIZE* size) const {
 736   HANDLE handle = GetThemeHandle(theme_name);
 737   if (handle && get_theme_part_size_)
 738     return get_theme_part_size_(handle, hdc, part_id, state_id, rect, ts, size);
 739
 740   return E_NOTIMPL;
 741 }
 742
 743 HRESULT NativeThemeWin::PaintButton(HDC hdc,
 744                                     State state,
 745                                     const ButtonExtraParams& extra,
 746                                     int part_id,
 747                                     int state_id,
 748                                     RECT* rect) const {
 749   HANDLE handle = GetThemeHandle(BUTTON);
 750   if (handle && draw_theme_)
 751     return draw_theme_(handle, hdc, part_id, state_id, rect, NULL);
 752
 753   // Adjust classic_state based on part, state, and extras.
 754   int classic_state = extra.classic_state;
 755   switch (part_id) {
 756     case BP_CHECKBOX:
 757       classic_state |= DFCS_BUTTONCHECK;
 758       break;
 759     case BP_RADIOBUTTON:
 760       classic_state |= DFCS_BUTTONRADIO;
 761       break;
 762     case BP_PUSHBUTTON:
 763       classic_state |= DFCS_BUTTONPUSH;
 764       break;
 765     default:
 766       NOTREACHED() << "Unknown part_id: " << part_id;
 767       break;
 768   }
 769
 770   switch (state) {
 771     case kDisabled:
 772       classic_state |= DFCS_INACTIVE;
 773       break;
 774     case kPressed:
 775       classic_state |= DFCS_PUSHED;
 776       break;
 777     case kNormal:
 778     case kHovered:
 779       break;
 780     default:
 781       NOTREACHED() << "Unknown state: " << state;
 782       break;
 783   }
 784
 785   if (extra.checked)
 786     classic_state |= DFCS_CHECKED;
 787
 788   // Draw it manually.
 789   // All pressed states have both low bits set, and no other states do.
 790   const bool focused = ((state_id & ETS_FOCUSED) == ETS_FOCUSED);
 791   const bool pressed = ((state_id & PBS_PRESSED) == PBS_PRESSED);
 792   if ((BP_PUSHBUTTON == part_id) && (pressed || focused)) {
 793     // BP_PUSHBUTTON has a focus rect drawn around the outer edge, and the
 794     // button itself is shrunk by 1 pixel.
 795     HBRUSH brush = GetSysColorBrush(COLOR_3DDKSHADOW);
 796     if (brush) {
 797       FrameRect(hdc, rect, brush);
 798       InflateRect(rect, -1, -1);
 799     }
 800   }
 801   DrawFrameControl(hdc, rect, DFC_BUTTON, classic_state);
 802
 803   // Draw the focus rectangle (the dotted line box) only on buttons.  For radio
 804   // and checkboxes, we let webkit draw the focus rectangle (orange glow).
 805   if ((BP_PUSHBUTTON == part_id) && focused) {
 806     // The focus rect is inside the button.  The exact number of pixels depends
 807     // on whether we're in classic mode or using uxtheme.
 808     if (handle && get_theme_content_rect_) {
 809       get_theme_content_rect_(handle, hdc, part_id, state_id, rect, rect);
 810     } else {
 811       InflateRect(rect, -GetSystemMetrics(SM_CXEDGE),
 812                   -GetSystemMetrics(SM_CYEDGE));
 813     }
 814     DrawFocusRect(hdc, rect);
 815   }
 816
 817   // Classic theme doesn't support indeterminate checkboxes.  We draw
 818   // a recangle inside a checkbox like IE10 does.
 819   if (part_id == BP_CHECKBOX && extra.indeterminate) {
 820     RECT inner_rect = *rect;
 821     // "4 / 13" is same as IE10 in classic theme.
 822     int padding = (inner_rect.right - inner_rect.left) * 4 / 13;
 823     InflateRect(&inner_rect, -padding, -padding);
 824     int color_index = state == kDisabled ? COLOR_GRAYTEXT : COLOR_WINDOWTEXT;
 825     FillRect(hdc, &inner_rect, GetSysColorBrush(color_index));
 826   }
 827
 828   return S_OK;
 829 }
 830
 831 HRESULT NativeThemeWin::PaintMenuSeparator(
 832     HDC hdc,
 833     const gfx::Rect& rect,
 834     const MenuSeparatorExtraParams& extra) const {
 835   RECT rect_win = rect.ToRECT();
 836
 837   HANDLE handle = GetThemeHandle(MENU);
 838   if (handle && draw_theme_) {
 839     // Delta is needed for non-classic to move separator up slightly.
 840     --rect_win.top;
 841     --rect_win.bottom;
 842     return draw_theme_(handle, hdc, MENU_POPUPSEPARATOR, MPI_NORMAL, &rect_win,
 843                        NULL);
 844   }
 845
 846   DrawEdge(hdc, &rect_win, EDGE_ETCHED, BF_TOP);
 847   return S_OK;
 848 }
 849
 850 HRESULT NativeThemeWin::PaintMenuGutter(HDC hdc,
 851                                         const gfx::Rect& rect) const {
 852   RECT rect_win = rect.ToRECT();
 853   HANDLE handle = GetThemeHandle(MENU);
 854   if (handle && draw_theme_)
 855     return draw_theme_(handle, hdc, MENU_POPUPGUTTER, MPI_NORMAL, &rect_win,
 856                        NULL);
 857   return E_NOTIMPL;
 858 }
 859
 860 HRESULT NativeThemeWin::PaintMenuArrow(HDC hdc,
 861                                        State state,
 862                                        const gfx::Rect& rect,
 863                                        const MenuArrowExtraParams& extra)
 864     const {
 865   int state_id = MSM_NORMAL;
 866   if (state == kDisabled)
 867     state_id = MSM_DISABLED;
 868
 869   HANDLE handle = GetThemeHandle(MENU);
 870   RECT rect_win = rect.ToRECT();
 871   if (handle && draw_theme_) {
 872     if (extra.pointing_right) {
 873       return draw_theme_(handle, hdc, MENU_POPUPSUBMENU, state_id, &rect_win,
 874                          NULL);
 875     } else {
 876       // There is no way to tell the uxtheme API to draw a left pointing arrow;
 877       // it doesn't have a flag equivalent to DFCS_MENUARROWRIGHT.  But they
 878       // are needed for RTL locales on Vista.  So use a memory DC and mirror
 879       // the region with GDI's StretchBlt.
 880       gfx::Rect r(rect);
 881       base::win::ScopedCreateDC mem_dc(CreateCompatibleDC(hdc));
 882       base::win::ScopedBitmap mem_bitmap(CreateCompatibleBitmap(hdc, r.width(),
 883                                                                 r.height()));
 884       base::win::ScopedSelectObject select_bitmap(mem_dc, mem_bitmap);
 885       // Copy and horizontally mirror the background from hdc into mem_dc. Use
 886       // a negative-width source rect, starting at the rightmost pixel.
 887       StretchBlt(mem_dc, 0, 0, r.width(), r.height(),
 888                  hdc, r.right()-1, r.y(), -r.width(), r.height(), SRCCOPY);
 889       // Draw the arrow.
 890       RECT theme_rect = {0, 0, r.width(), r.height()};
 891       HRESULT result = draw_theme_(handle, mem_dc, MENU_POPUPSUBMENU,
 892                                    state_id, &theme_rect, NULL);
 893       // Copy and mirror the result back into mem_dc.
 894       StretchBlt(hdc, r.x(), r.y(), r.width(), r.height(),
 895                  mem_dc, r.width()-1, 0, -r.width(), r.height(), SRCCOPY);
 896       return result;
 897     }
 898   }
 899
 900   // For some reason, Windows uses the name DFCS_MENUARROWRIGHT to indicate a
 901   // left pointing arrow. This makes the following 'if' statement slightly
 902   // counterintuitive.
 903   UINT pfc_state;
 904   if (extra.pointing_right)
 905     pfc_state = DFCS_MENUARROW;
 906   else
 907     pfc_state = DFCS_MENUARROWRIGHT;
 908   return PaintFrameControl(hdc, rect, DFC_MENU, pfc_state, extra.is_selected,
 909                            state);
 910 }
 911
 912 HRESULT NativeThemeWin::PaintMenuBackground(HDC hdc,
 913                                             const gfx::Rect& rect) const {
 914   HANDLE handle = GetThemeHandle(MENU);
 915   RECT rect_win = rect.ToRECT();
 916   if (handle && draw_theme_) {
 917     HRESULT result = draw_theme_(handle, hdc, MENU_POPUPBACKGROUND, 0,
 918                                  &rect_win, NULL);
 919     FrameRect(hdc, &rect_win, GetSysColorBrush(COLOR_3DSHADOW));
 920     return result;
 921   }
 922
 923   FillRect(hdc, &rect_win, GetSysColorBrush(COLOR_MENU));
 924   DrawEdge(hdc, &rect_win, EDGE_RAISED, BF_RECT);
 925   return S_OK;
 926 }
 927
 928 HRESULT NativeThemeWin::PaintMenuCheck(
 929     HDC hdc,
 930     State state,
 931     const gfx::Rect& rect,
 932     const MenuCheckExtraParams& extra) const {
 933   HANDLE handle = GetThemeHandle(MENU);
 934   int state_id;
 935   if (extra.is_radio) {
 936     state_id = state == kDisabled ? MC_BULLETDISABLED : MC_BULLETNORMAL;
 937   } else {
 938     state_id = state == kDisabled ? MC_CHECKMARKDISABLED : MC_CHECKMARKNORMAL;
 939   }
 940
 941   RECT rect_win = rect.ToRECT();
 942   if (handle && draw_theme_)
 943     return draw_theme_(handle, hdc, MENU_POPUPCHECK, state_id, &rect_win, NULL);
 944
 945   return PaintFrameControl(hdc, rect, DFC_MENU,
 946                            extra.is_radio ? DFCS_MENUBULLET : DFCS_MENUCHECK,
 947                            extra.is_selected, state);
 948 }
 949
 950 HRESULT NativeThemeWin::PaintMenuCheckBackground(HDC hdc,
 951                                                  State state,
 952                                                  const gfx::Rect& rect) const {
 953   HANDLE handle = GetThemeHandle(MENU);
 954   int state_id = state == kDisabled ? MCB_DISABLED : MCB_NORMAL;
 955   RECT rect_win = rect.ToRECT();
 956   if (handle && draw_theme_)
 957     return draw_theme_(handle, hdc, MENU_POPUPCHECKBACKGROUND, state_id,
 958                        &rect_win, NULL);
 959   // Nothing to do for background.
 960   return S_OK;
 961 }
 962
 963 HRESULT NativeThemeWin::PaintMenuItemBackground(
 964     HDC hdc,
 965     State state,
 966     const gfx::Rect& rect,
 967     const MenuItemExtraParams& extra) const {
 968   HANDLE handle = GetThemeHandle(MENU);
 969   RECT rect_win = rect.ToRECT();
 970   int state_id;
 971   switch (state) {
 972     case kNormal:
 973       state_id = MPI_NORMAL;
 974       break;
 975     case kDisabled:
 976       state_id = extra.is_selected ? MPI_DISABLEDHOT : MPI_DISABLED;
 977       break;
 978     case kHovered:
 979       state_id = MPI_HOT;
 980       break;
 981     default:
 982       NOTREACHED() << "Invalid state " << state;
 983       break;
 984   }
 985
 986   if (handle && draw_theme_)
 987     return draw_theme_(handle, hdc, MENU_POPUPITEM, state_id, &rect_win, NULL);
 988
 989   if (extra.is_selected)
 990     FillRect(hdc, &rect_win, GetSysColorBrush(COLOR_HIGHLIGHT));
 991   return S_OK;
 992 }
 993
 994 HRESULT NativeThemeWin::PaintPushButton(HDC hdc,
 995                                         Part part,
 996                                         State state,
 997                                         const gfx::Rect& rect,
 998                                         const ButtonExtraParams& extra) const {
 999   int state_id;
1000   switch (state) {
1001     case kDisabled:
1002       state_id = PBS_DISABLED;
1003       break;
1004     case kHovered:
1005       state_id = PBS_HOT;
1006       break;
1007     case kNormal:
1008       state_id = extra.is_default ? PBS_DEFAULTED : PBS_NORMAL;
1009       break;
1010     case kPressed:
1011       state_id = PBS_PRESSED;
1012       break;
1013     default:
1014       NOTREACHED() << "Invalid state: " << state;
1015       break;
1016   }
1017
1018   RECT rect_win = rect.ToRECT();
1019   return PaintButton(hdc, state, extra, BP_PUSHBUTTON, state_id, &rect_win);
1020 }
1021
1022 HRESULT NativeThemeWin::PaintRadioButton(HDC hdc,
1023                                          Part part,
1024                                          State state,
1025                                          const gfx::Rect& rect,
1026                                          const ButtonExtraParams& extra) const {
1027   int state_id;
1028   switch (state) {
1029     case kDisabled:
1030       state_id = extra.checked ? RBS_CHECKEDDISABLED : RBS_UNCHECKEDDISABLED;
1031       break;
1032     case kHovered:
1033       state_id = extra.checked ? RBS_CHECKEDHOT : RBS_UNCHECKEDHOT;
1034       break;
1035     case kNormal:
1036       state_id = extra.checked ? RBS_CHECKEDNORMAL : RBS_UNCHECKEDNORMAL;
1037       break;
1038     case kPressed:
1039       state_id = extra.checked ? RBS_CHECKEDPRESSED : RBS_UNCHECKEDPRESSED;
1040       break;
1041     default:
1042       NOTREACHED() << "Invalid state: " << state;
1043       break;
1044   }
1045
1046   RECT rect_win = rect.ToRECT();
1047   return PaintButton(hdc, state, extra, BP_RADIOBUTTON, state_id, &rect_win);
1048 }
1049
1050 HRESULT NativeThemeWin::PaintCheckbox(HDC hdc,
1051                                       Part part,
1052                                       State state,
1053                                       const gfx::Rect& rect,
1054                                       const ButtonExtraParams& extra) const {
1055   int state_id;
1056   switch (state) {
1057     case kDisabled:
1058       state_id = extra.checked ? CBS_CHECKEDDISABLED :
1059           extra.indeterminate ? CBS_MIXEDDISABLED :
1060               CBS_UNCHECKEDDISABLED;
1061       break;
1062     case kHovered:
1063       state_id = extra.checked ? CBS_CHECKEDHOT :
1064           extra.indeterminate ? CBS_MIXEDHOT :
1065               CBS_UNCHECKEDHOT;
1066       break;
1067     case kNormal:
1068       state_id = extra.checked ? CBS_CHECKEDNORMAL :
1069           extra.indeterminate ? CBS_MIXEDNORMAL :
1070               CBS_UNCHECKEDNORMAL;
1071       break;
1072     case kPressed:
1073       state_id = extra.checked ? CBS_CHECKEDPRESSED :
1074           extra.indeterminate ? CBS_MIXEDPRESSED :
1075               CBS_UNCHECKEDPRESSED;
1076       break;
1077     default:
1078       NOTREACHED() << "Invalid state: " << state;
1079       break;
1080   }
1081
1082   RECT rect_win = rect.ToRECT();
1083   return PaintButton(hdc, state, extra, BP_CHECKBOX, state_id, &rect_win);
1084 }
1085
1086 HRESULT NativeThemeWin::PaintMenuList(HDC hdc,
1087                                       State state,
1088                                       const gfx::Rect& rect,
1089                                       const MenuListExtraParams& extra) const {
1090   HANDLE handle = GetThemeHandle(MENULIST);
1091   RECT rect_win = rect.ToRECT();
1092   int state_id;
1093   switch (state) {
1094     case kNormal:
1095       state_id = CBXS_NORMAL;
1096       break;
1097     case kDisabled:
1098       state_id = CBXS_DISABLED;
1099       break;
1100     case kHovered:
1101       state_id = CBXS_HOT;
1102       break;
1103     case kPressed:
1104       state_id = CBXS_PRESSED;
1105       break;
1106     default:
1107       NOTREACHED() << "Invalid state " << state;
1108       break;
1109   }
1110
1111   if (handle && draw_theme_)
1112     return draw_theme_(handle, hdc, CP_DROPDOWNBUTTON, state_id, &rect_win,
1113                        NULL);
1114
1115   // Draw it manually.
1116   DrawFrameControl(hdc, &rect_win, DFC_SCROLL,
1117                    DFCS_SCROLLCOMBOBOX | extra.classic_state);
1118   return S_OK;
1119 }
1120
1121 HRESULT NativeThemeWin::PaintScrollbarArrow(
1122     HDC hdc,
1123     Part part,
1124     State state,
1125     const gfx::Rect& rect,
1126     const ScrollbarArrowExtraParams& extra) const {
1127   static const int state_id_matrix[4][kMaxState] = {
1128       ABS_DOWNDISABLED, ABS_DOWNHOT, ABS_DOWNNORMAL, ABS_DOWNPRESSED,
1129       ABS_LEFTDISABLED, ABS_LEFTHOT, ABS_LEFTNORMAL, ABS_LEFTPRESSED,
1130       ABS_RIGHTDISABLED, ABS_RIGHTHOT, ABS_RIGHTNORMAL, ABS_RIGHTPRESSED,
1131       ABS_UPDISABLED, ABS_UPHOT, ABS_UPNORMAL, ABS_UPPRESSED
1132   };
1133   HANDLE handle = GetThemeHandle(SCROLLBAR);
1134   RECT rect_win = rect.ToRECT();
1135   if (handle && draw_theme_) {
1136     int index = part - kScrollbarDownArrow;
1137     DCHECK(index >=0 && index < 4);
1138     int state_id = state_id_matrix[index][state];
1139
1140     // Hovering means that the cursor is over the scroolbar, but not over the
1141     // specific arrow itself.  We don't want to show it "hot" mode, but only
1142     // in "hover" mode.
1143     if (state == kHovered && extra.is_hovering) {
1144       switch (part) {
1145         case kScrollbarDownArrow:
1146           state_id = ABS_DOWNHOVER;
1147           break;
1148         case kScrollbarLeftArrow:
1149           state_id = ABS_LEFTHOVER;
1150           break;
1151         case kScrollbarRightArrow:
1152           state_id = ABS_RIGHTHOVER;
1153           break;
1154         case kScrollbarUpArrow:
1155           state_id = ABS_UPHOVER;
1156           break;
1157         default:
1158           NOTREACHED() << "Invalid part: " << part;
1159           break;
1160       }
1161     }
1162     return PaintScaledTheme(handle, hdc, SBP_ARROWBTN, state_id, rect);
1163   }
1164
1165   int classic_state = DFCS_SCROLLDOWN;
1166   switch (part) {
1167     case kScrollbarDownArrow:
1168       classic_state = DFCS_SCROLLDOWN;
1169       break;
1170     case kScrollbarLeftArrow:
1171       classic_state = DFCS_SCROLLLEFT;
1172       break;
1173     case kScrollbarRightArrow:
1174       classic_state = DFCS_SCROLLRIGHT;
1175       break;
1176     case kScrollbarUpArrow:
1177       classic_state = DFCS_SCROLLUP;
1178       break;
1179     default:
1180       NOTREACHED() << "Invalid part: " << part;
1181       break;
1182   }
1183   switch (state) {
1184     case kDisabled:
1185       classic_state |= DFCS_INACTIVE;
1186       break;
1187     case kHovered:
1188       classic_state |= DFCS_HOT;
1189       break;
1190     case kNormal:
1191       break;
1192     case kPressed:
1193       classic_state |= DFCS_PUSHED;
1194       break;
1195     default:
1196       NOTREACHED() << "Invalid state: " << state;
1197       break;
1198   }
1199   DrawFrameControl(hdc, &rect_win, DFC_SCROLL, classic_state);
1200   return S_OK;
1201 }
1202
1203 HRESULT NativeThemeWin::PaintScrollbarThumb(
1204     HDC hdc,
1205     Part part,
1206     State state,
1207     const gfx::Rect& rect,
1208     const ScrollbarThumbExtraParams& extra) const {
1209   HANDLE handle = GetThemeHandle(SCROLLBAR);
1210   RECT rect_win = rect.ToRECT();
1211   int part_id;
1212   int state_id;
1213
1214   switch (part) {
1215     case NativeTheme::kScrollbarHorizontalThumb:
1216       part_id = SBP_THUMBBTNHORZ;
1217       break;
1218     case NativeTheme::kScrollbarVerticalThumb:
1219       part_id = SBP_THUMBBTNVERT;
1220       break;
1221     case NativeTheme::kScrollbarHorizontalGripper:
1222       part_id = SBP_GRIPPERHORZ;
1223       break;
1224     case NativeTheme::kScrollbarVerticalGripper:
1225       part_id = SBP_GRIPPERVERT;
1226       break;
1227     default:
1228       NOTREACHED() << "Invalid part: " << part;
1229       break;
1230   }
1231
1232   switch (state) {
1233     case kDisabled:
1234       state_id = SCRBS_DISABLED;
1235       break;
1236     case kHovered:
1237       state_id = extra.is_hovering ? SCRBS_HOVER : SCRBS_HOT;
1238       break;
1239     case kNormal:
1240       state_id = SCRBS_NORMAL;
1241       break;
1242     case kPressed:
1243       state_id = SCRBS_PRESSED;
1244       break;
1245     default:
1246       NOTREACHED() << "Invalid state: " << state;
1247       break;
1248   }
1249
1250   if (handle && draw_theme_)
1251     return PaintScaledTheme(handle, hdc, part_id, state_id, rect);
1252
1253   // Draw it manually.
1254   if ((part_id == SBP_THUMBBTNHORZ) || (part_id == SBP_THUMBBTNVERT))
1255     DrawEdge(hdc, &rect_win, EDGE_RAISED, BF_RECT | BF_MIDDLE);
1256   // Classic mode doesn't have a gripper.
1257   return S_OK;
1258 }
1259
1260 HRESULT NativeThemeWin::PaintScrollbarTrack(
1261     SkCanvas* canvas,
1262     HDC hdc,
1263     Part part,
1264     State state,
1265     const gfx::Rect& rect,
1266     const ScrollbarTrackExtraParams& extra) const {
1267   HANDLE handle = GetThemeHandle(SCROLLBAR);
1268   RECT rect_win = rect.ToRECT();
1269   int part_id;
1270   int state_id;
1271
1272   switch (part) {
1273     case NativeTheme::kScrollbarHorizontalTrack:
1274       part_id = extra.is_upper ? SBP_UPPERTRACKHORZ : SBP_LOWERTRACKHORZ;
1275       break;
1276     case NativeTheme::kScrollbarVerticalTrack:
1277       part_id = extra.is_upper ? SBP_UPPERTRACKVERT : SBP_LOWERTRACKVERT;
1278       break;
1279     default:
1280       NOTREACHED() << "Invalid part: " << part;
1281       break;
1282   }
1283
1284   switch (state) {
1285     case kDisabled:
1286       state_id = SCRBS_DISABLED;
1287       break;
1288     case kHovered:
1289       state_id = SCRBS_HOVER;
1290       break;
1291     case kNormal:
1292       state_id = SCRBS_NORMAL;
1293       break;
1294     case kPressed:
1295       state_id = SCRBS_PRESSED;
1296       break;
1297     default:
1298       NOTREACHED() << "Invalid state: " << state;
1299       break;
1300   }
1301
1302   if (handle && draw_theme_)
1303     return draw_theme_(handle, hdc, part_id, state_id, &rect_win, NULL);
1304
1305   // Draw it manually.
1306   if ((system_colors_[COLOR_SCROLLBAR] != system_colors_[COLOR_3DFACE]) &&
1307       (system_colors_[COLOR_SCROLLBAR] != system_colors_[COLOR_WINDOW])) {
1308     FillRect(hdc, &rect_win, reinterpret_cast<HBRUSH>(COLOR_SCROLLBAR + 1));
1309   } else {
1310     SkPaint paint;
1311     RECT align_rect = gfx::Rect(extra.track_x, extra.track_y, extra.track_width,
1312                                 extra.track_height).ToRECT();
1313     SetCheckerboardShader(&paint, align_rect);
1314     canvas->drawIRect(skia::RECTToSkIRect(rect_win), paint);
1315   }
1316   if (extra.classic_state & DFCS_PUSHED)
1317     InvertRect(hdc, &rect_win);
1318   return S_OK;
1319 }
1320
1321 HRESULT NativeThemeWin::PaintSpinButton(
1322     HDC hdc,
1323     Part part,
1324     State state,
1325     const gfx::Rect& rect,
1326     const InnerSpinButtonExtraParams& extra) const {
1327   HANDLE handle = GetThemeHandle(SPIN);
1328   RECT rect_win = rect.ToRECT();
1329   int part_id = extra.spin_up ? SPNP_UP : SPNP_DOWN;
1330   int state_id;
1331   switch (state) {
1332     case kDisabled:
1333       state_id = extra.spin_up ? UPS_DISABLED : DNS_DISABLED;
1334       break;
1335     case kHovered:
1336       state_id = extra.spin_up ? UPS_HOT : DNS_HOT;
1337       break;
1338     case kNormal:
1339       state_id = extra.spin_up ? UPS_NORMAL : DNS_NORMAL;
1340       break;
1341     case kPressed:
1342       state_id = extra.spin_up ? UPS_PRESSED : DNS_PRESSED;
1343       break;
1344     default:
1345       NOTREACHED() << "Invalid state " << state;
1346       break;
1347   }
1348
1349   if (handle && draw_theme_)
1350     return draw_theme_(handle, hdc, part_id, state_id, &rect_win, NULL);
1351   DrawFrameControl(hdc, &rect_win, DFC_SCROLL, extra.classic_state);
1352   return S_OK;
1353 }
1354
1355 HRESULT NativeThemeWin::PaintTrackbar(
1356     SkCanvas* canvas,
1357     HDC hdc,
1358     Part part,
1359     State state,
1360     const gfx::Rect& rect,
1361     const TrackbarExtraParams& extra) const {
1362   int part_id = part == kTrackbarTrack ? TKP_TRACK : TKP_THUMBBOTTOM;
1363   if (extra.vertical)
1364     part_id = part == kTrackbarTrack ? TKP_TRACKVERT : TKP_THUMBVERT;
1365
1366   int state_id = 0;
1367   switch (state) {
1368     case kDisabled:
1369       state_id = TUS_DISABLED;
1370       break;
1371     case kHovered:
1372       state_id = TUS_HOT;
1373       break;
1374     case kNormal:
1375       state_id = TUS_NORMAL;
1376       break;
1377     case kPressed:
1378       state_id = TUS_PRESSED;
1379       break;
1380     default:
1381       NOTREACHED() << "Invalid state " << state;
1382       break;
1383   }
1384
1385   // Make the channel be 4 px thick in the center of the supplied rect.  (4 px
1386   // matches what XP does in various menus; GetThemePartSize() doesn't seem to
1387   // return good values here.)
1388   RECT rect_win = rect.ToRECT();
1389   RECT channel_rect = rect.ToRECT();
1390   const int channel_thickness = 4;
1391   if (part_id == TKP_TRACK) {
1392     channel_rect.top +=
1393         ((channel_rect.bottom - channel_rect.top - channel_thickness) / 2);
1394     channel_rect.bottom = channel_rect.top + channel_thickness;
1395   } else if (part_id == TKP_TRACKVERT) {
1396     channel_rect.left +=
1397         ((channel_rect.right - channel_rect.left - channel_thickness) / 2);
1398     channel_rect.right = channel_rect.left + channel_thickness;
1399   }  // else this isn't actually a channel, so |channel_rect| == |rect|.
1400
1401   HANDLE handle = GetThemeHandle(TRACKBAR);
1402   if (handle && draw_theme_)
1403     return draw_theme_(handle, hdc, part_id, state_id, &channel_rect, NULL);
1404
1405   // Classic mode, draw it manually.
1406   if ((part_id == TKP_TRACK) || (part_id == TKP_TRACKVERT)) {
1407     DrawEdge(hdc, &channel_rect, EDGE_SUNKEN, BF_RECT);
1408   } else if (part_id == TKP_THUMBVERT) {
1409     DrawEdge(hdc, &rect_win, EDGE_RAISED, BF_RECT | BF_SOFT | BF_MIDDLE);
1410   } else {
1411     // Split rect into top and bottom pieces.
1412     RECT top_section = rect.ToRECT();
1413     RECT bottom_section = rect.ToRECT();
1414     top_section.bottom -= ((bottom_section.right - bottom_section.left) / 2);
1415     bottom_section.top = top_section.bottom;
1416     DrawEdge(hdc, &top_section, EDGE_RAISED,
1417              BF_LEFT | BF_TOP | BF_RIGHT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
1418
1419     // Split triangular piece into two diagonals.
1420     RECT& left_half = bottom_section;
1421     RECT right_half = bottom_section;
1422     right_half.left += ((bottom_section.right - bottom_section.left) / 2);
1423     left_half.right = right_half.left;
1424     DrawEdge(hdc, &left_half, EDGE_RAISED,
1425              BF_DIAGONAL_ENDTOPLEFT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
1426     DrawEdge(hdc, &right_half, EDGE_RAISED,
1427              BF_DIAGONAL_ENDBOTTOMLEFT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
1428
1429     // If the button is pressed, draw hatching.
1430     if (extra.classic_state & DFCS_PUSHED) {
1431       SkPaint paint;
1432       SetCheckerboardShader(&paint, rect_win);
1433
1434       // Fill all three pieces with the pattern.
1435       canvas->drawIRect(skia::RECTToSkIRect(top_section), paint);
1436
1437       SkScalar left_triangle_top = SkIntToScalar(left_half.top);
1438       SkScalar left_triangle_right = SkIntToScalar(left_half.right);
1439       SkPath left_triangle;
1440       left_triangle.moveTo(SkIntToScalar(left_half.left), left_triangle_top);
1441       left_triangle.lineTo(left_triangle_right, left_triangle_top);
1442       left_triangle.lineTo(left_triangle_right,
1443                            SkIntToScalar(left_half.bottom));
1444       left_triangle.close();
1445       canvas->drawPath(left_triangle, paint);
1446
1447       SkScalar right_triangle_left = SkIntToScalar(right_half.left);
1448       SkScalar right_triangle_top = SkIntToScalar(right_half.top);
1449       SkPath right_triangle;
1450       right_triangle.moveTo(right_triangle_left, right_triangle_top);
1451       right_triangle.lineTo(SkIntToScalar(right_half.right),
1452                             right_triangle_top);
1453       right_triangle.lineTo(right_triangle_left,
1454                             SkIntToScalar(right_half.bottom));
1455       right_triangle.close();
1456       canvas->drawPath(right_triangle, paint);
1457     }
1458   }
1459   return S_OK;
1460 }
1461
1462 HRESULT NativeThemeWin::PaintProgressBar(
1463     HDC hdc,
1464     const gfx::Rect& rect,
1465     const ProgressBarExtraParams& extra) const {
1466   // There is no documentation about the animation speed, frame-rate, nor
1467   // size of moving overlay of the indeterminate progress bar.
1468   // So we just observed real-world programs and guessed following parameters.
1469   const int kDeteminateOverlayPixelsPerSecond = 300;
1470   const int kDeteminateOverlayWidth = 120;
1471   const int kIndeterminateOverlayPixelsPerSecond =  175;
1472   const int kVistaIndeterminateOverlayWidth = 120;
1473   const int kXPIndeterminateOverlayWidth = 55;
1474   // The thickness of the bar frame inside |value_rect|
1475   const int kXPBarPadding = 3;
1476
1477   RECT bar_rect = rect.ToRECT();
1478   RECT value_rect = gfx::Rect(extra.value_rect_x,
1479                               extra.value_rect_y,
1480                               extra.value_rect_width,
1481                               extra.value_rect_height).ToRECT();
1482
1483   bool pre_vista = base::win::GetVersion() < base::win::VERSION_VISTA;
1484   HANDLE handle = GetThemeHandle(PROGRESS);
1485   if (handle && draw_theme_ && draw_theme_ex_) {
1486     draw_theme_(handle, hdc, PP_BAR, 0, &bar_rect, NULL);
1487
1488     int bar_width = bar_rect.right - bar_rect.left;
1489     if (extra.determinate) {
1490       // TODO(morrita): this RTL guess can be wrong.
1491       // We should pass the direction from WebKit side.
1492       bool is_rtl = (bar_rect.right == value_rect.right &&
1493                      bar_rect.left != value_rect.left);
1494       // We should care the direction here because PP_CNUNK painting
1495       // is asymmetric.
1496       DTBGOPTS value_draw_options;
1497       value_draw_options.dwSize = sizeof(DTBGOPTS);
1498       value_draw_options.dwFlags = is_rtl ? DTBG_MIRRORDC : 0;
1499       value_draw_options.rcClip = bar_rect;
1500
1501       if (pre_vista) {
1502         // On XP, progress bar is chunk-style and has no glossy effect.
1503         // We need to shrink destination rect to fit the part inside the bar
1504         // with an appropriate margin.
1505         RECT shrunk_value_rect = InsetRect(&value_rect, kXPBarPadding);
1506         draw_theme_ex_(handle, hdc, PP_CHUNK, 0,
1507                        &shrunk_value_rect, &value_draw_options);
1508       } else  {
1509         // On Vista or later, the progress bar part has a
1510         // single-block value part. It also has glossy effect.
1511         // And the value part has exactly same height as the bar part
1512         // so we don't need to shrink the rect.
1513         draw_theme_ex_(handle, hdc, PP_FILL, 0,
1514                        &value_rect, &value_draw_options);
1515
1516         int dx = ComputeAnimationProgress(bar_width,
1517                                           kDeteminateOverlayWidth,
1518                                           kDeteminateOverlayPixelsPerSecond,
1519                                           extra.animated_seconds);
1520         RECT overlay_rect = value_rect;
1521         overlay_rect.left += dx;
1522         overlay_rect.right = overlay_rect.left + kDeteminateOverlayWidth;
1523         draw_theme_(handle, hdc, PP_MOVEOVERLAY, 0, &overlay_rect, &value_rect);
1524       }
1525     } else {
1526       // A glossy overlay for indeterminate progress bar has small pause
1527       // after each animation. We emulate this by adding an invisible margin
1528       // the animation has to traverse.
1529       int width_with_margin = bar_width + kIndeterminateOverlayPixelsPerSecond;
1530       int overlay_width = pre_vista ?
1531           kXPIndeterminateOverlayWidth : kVistaIndeterminateOverlayWidth;
1532       int dx = ComputeAnimationProgress(width_with_margin,
1533                                         overlay_width,
1534                                         kIndeterminateOverlayPixelsPerSecond,
1535                                         extra.animated_seconds);
1536       RECT overlay_rect = bar_rect;
1537       overlay_rect.left += dx;
1538       overlay_rect.right = overlay_rect.left + overlay_width;
1539       if (pre_vista) {
1540         RECT shrunk_rect = InsetRect(&overlay_rect, kXPBarPadding);
1541         RECT shrunk_bar_rect = InsetRect(&bar_rect, kXPBarPadding);
1542         draw_theme_(handle, hdc, PP_CHUNK, 0, &shrunk_rect, &shrunk_bar_rect);
1543       } else {
1544         draw_theme_(handle, hdc, PP_MOVEOVERLAY, 0, &overlay_rect, &bar_rect);
1545       }
1546     }
1547
1548     return S_OK;
1549   }
1550
1551   HBRUSH bg_brush = GetSysColorBrush(COLOR_BTNFACE);
1552   HBRUSH fg_brush = GetSysColorBrush(COLOR_BTNSHADOW);
1553   FillRect(hdc, &bar_rect, bg_brush);
1554   FillRect(hdc, &value_rect, fg_brush);
1555   DrawEdge(hdc, &bar_rect, EDGE_SUNKEN, BF_RECT | BF_ADJUST);
1556   return S_OK;
1557 }
1558
1559 HRESULT NativeThemeWin::PaintWindowResizeGripper(HDC hdc,
1560                                                  const gfx::Rect& rect) const {
1561   HANDLE handle = GetThemeHandle(STATUS);
1562   RECT rect_win = rect.ToRECT();
1563   if (handle && draw_theme_) {
1564     // Paint the status bar gripper.  There doesn't seem to be a
1565     // standard gripper in Windows for the space between
1566     // scrollbars.  This is pretty close, but it's supposed to be
1567     // painted over a status bar.
1568     return draw_theme_(handle, hdc, SP_GRIPPER, 0, &rect_win, NULL);
1569   }
1570
1571   // Draw a windows classic scrollbar gripper.
1572   DrawFrameControl(hdc, &rect_win, DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
1573   return S_OK;
1574 }
1575
1576 HRESULT NativeThemeWin::PaintTabPanelBackground(HDC hdc,
1577                                                 const gfx::Rect& rect) const {
1578   HANDLE handle = GetThemeHandle(TAB);
1579   RECT rect_win = rect.ToRECT();
1580   if (handle && draw_theme_)
1581     return draw_theme_(handle, hdc, TABP_BODY, 0, &rect_win, NULL);
1582
1583   // Classic just renders a flat color background.
1584   FillRect(hdc, &rect_win, reinterpret_cast<HBRUSH>(COLOR_3DFACE + 1));
1585   return S_OK;
1586 }
1587
1588 HRESULT NativeThemeWin::PaintTextField(
1589     HDC hdc,
1590     Part part,
1591     State state,
1592     const gfx::Rect& rect,
1593     const TextFieldExtraParams& extra) const {
1594   int part_id = EP_EDITTEXT;
1595   int state_id = ETS_NORMAL;
1596   switch (state) {
1597     case kNormal:
1598       if (extra.is_read_only) {
1599         state_id = ETS_READONLY;
1600       } else if (extra.is_focused) {
1601         state_id = ETS_FOCUSED;
1602       } else {
1603         state_id = ETS_NORMAL;
1604       }
1605       break;
1606     case kHovered:
1607       state_id = ETS_HOT;
1608       break;
1609     case kPressed:
1610       state_id = ETS_SELECTED;
1611       break;
1612     case kDisabled:
1613       state_id = ETS_DISABLED;
1614       break;
1615     default:
1616       NOTREACHED() << "Invalid state: " << state;
1617       break;
1618   }
1619
1620   RECT rect_win = rect.ToRECT();
1621   return PaintTextField(hdc, part_id, state_id, extra.classic_state,
1622                         &rect_win,
1623                         skia::SkColorToCOLORREF(extra.background_color),
1624                         extra.fill_content_area, extra.draw_edges);
1625 }
1626
1627 HRESULT NativeThemeWin::PaintTextField(HDC hdc,
1628                                        int part_id,
1629                                        int state_id,
1630                                        int classic_state,
1631                                        RECT* rect,
1632                                        COLORREF color,
1633                                        bool fill_content_area,
1634                                        bool draw_edges) const {
1635   // TODO(ojan): http://b/1210017 Figure out how to give the ability to
1636   // exclude individual edges from being drawn.
1637
1638   HANDLE handle = GetThemeHandle(TEXTFIELD);
1639   // TODO(mpcomplete): can we detect if the color is specified by the user,
1640   // and if not, just use the system color?
1641   // CreateSolidBrush() accepts a RGB value but alpha must be 0.
1642   HBRUSH bg_brush = CreateSolidBrush(color);
1643   HRESULT hr;
1644   // DrawThemeBackgroundEx was introduced in XP SP2, so that it's possible
1645   // draw_theme_ex_ is NULL and draw_theme_ is non-null.
1646   if (handle && (draw_theme_ex_ || (draw_theme_ && draw_edges))) {
1647     if (draw_theme_ex_) {
1648       static const DTBGOPTS omit_border_options = {
1649         sizeof(DTBGOPTS),
1650         DTBG_OMITBORDER,
1651         { 0, 0, 0, 0 }
1652       };
1653       const DTBGOPTS* draw_opts = draw_edges ? NULL : &omit_border_options;
1654       hr = draw_theme_ex_(handle, hdc, part_id, state_id, rect, draw_opts);
1655     } else {
1656       hr = draw_theme_(handle, hdc, part_id, state_id, rect, NULL);
1657     }
1658
1659     // TODO(maruel): Need to be fixed if get_theme_content_rect_ is NULL.
1660     if (fill_content_area && get_theme_content_rect_) {
1661       RECT content_rect;
1662       hr = get_theme_content_rect_(handle, hdc, part_id, state_id, rect,
1663                                    &content_rect);
1664       FillRect(hdc, &content_rect, bg_brush);
1665     }
1666   } else {
1667     // Draw it manually.
1668     if (draw_edges)
1669       DrawEdge(hdc, rect, EDGE_SUNKEN, BF_RECT | BF_ADJUST);
1670
1671     if (fill_content_area) {
1672       FillRect(hdc, rect, (classic_state & DFCS_INACTIVE) ?
1673                    reinterpret_cast<HBRUSH>(COLOR_BTNFACE + 1) : bg_brush);
1674     }
1675     hr = S_OK;
1676   }
1677   DeleteObject(bg_brush);
1678   return hr;
1679 }
1680
1681 HRESULT NativeThemeWin::PaintScaledTheme(HANDLE theme,
1682                                          HDC hdc,
1683                                          int part_id,
1684                                          int state_id,
1685                                          const gfx::Rect& rect) const {
1686   // Correct the scaling and positioning of sub-components such as scrollbar
1687   // arrows and thumb grippers in the event that the world transform applies
1688   // scaling (e.g. in high-DPI mode).
1689   XFORM save_transform;
1690   if (GetWorldTransform(hdc, &save_transform)) {
1691     float scale = save_transform.eM11;
1692     if (scale != 1 && save_transform.eM12 == 0) {
1693       ModifyWorldTransform(hdc, NULL, MWT_IDENTITY);
1694       gfx::Rect scaled_rect = gfx::ToEnclosedRect(
1695           gfx::ScaleRect(rect, scale));
1696       RECT bounds = gfx::Rect(scaled_rect.x() + save_transform.eDx,
1697                               scaled_rect.y() + save_transform.eDy,
1698                               scaled_rect.width(),
1699                               scaled_rect.height()).ToRECT();
1700       HRESULT result = draw_theme_(theme, hdc, part_id, state_id, &bounds,
1701                                    NULL);
1702       SetWorldTransform(hdc, &save_transform);
1703       return result;
1704     }
1705   }
1706   RECT bounds = rect.ToRECT();
1707   return draw_theme_(theme, hdc, part_id, state_id, &bounds, NULL);
1708 }
1709
1710 // static
1711 NativeThemeWin::ThemeName NativeThemeWin::GetThemeName(Part part) {
1712   ThemeName name;
1713   switch (part) {
1714     case kCheckbox:
1715     case kRadio:
1716     case kPushButton:
1717       name = BUTTON;
1718       break;
1719     case kInnerSpinButton:
1720       name = SPIN;
1721       break;
1722     case kMenuCheck:
1723     case kMenuPopupGutter:
1724     case kMenuList:
1725     case kMenuPopupArrow:
1726     case kMenuPopupSeparator:
1727       name = MENU;
1728       break;
1729     case kProgressBar:
1730       name = PROGRESS;
1731       break;
1732     case kScrollbarDownArrow:
1733     case kScrollbarLeftArrow:
1734     case kScrollbarRightArrow:
1735     case kScrollbarUpArrow:
1736     case kScrollbarHorizontalThumb:
1737     case kScrollbarVerticalThumb:
1738     case kScrollbarHorizontalTrack:
1739     case kScrollbarVerticalTrack:
1740       name = SCROLLBAR;
1741       break;
1742     case kSliderTrack:
1743     case kSliderThumb:
1744       name = TRACKBAR;
1745       break;
1746     case kTextField:
1747       name = TEXTFIELD;
1748       break;
1749     case kWindowResizeGripper:
1750       name = STATUS;
1751       break;
1752     default:
1753       NOTREACHED() << "Invalid part: " << part;
1754       break;
1755   }
1756   return name;
1757 }
1758
1759 // static
1760 int NativeThemeWin::GetWindowsPart(Part part,
1761                                    State state,
1762                                    const ExtraParams& extra) {
1763   int part_id;
1764   switch (part) {
1765     case kCheckbox:
1766       part_id = BP_CHECKBOX;
1767       break;
1768     case kMenuCheck:
1769       part_id = MENU_POPUPCHECK;
1770       break;
1771     case kMenuPopupArrow:
1772       part_id = MENU_POPUPSUBMENU;
1773       break;
1774     case kMenuPopupGutter:
1775       part_id = MENU_POPUPGUTTER;
1776       break;
1777     case kMenuPopupSeparator:
1778       part_id = MENU_POPUPSEPARATOR;
1779       break;
1780     case kPushButton:
1781       part_id = BP_PUSHBUTTON;
1782       break;
1783     case kRadio:
1784       part_id = BP_RADIOBUTTON;
1785       break;
1786     case kWindowResizeGripper:
1787       part_id = SP_GRIPPER;
1788       break;
1789     case kScrollbarDownArrow:
1790     case kScrollbarLeftArrow:
1791     case kScrollbarRightArrow:
1792     case kScrollbarUpArrow:
1793       part_id = SBP_ARROWBTN;
1794       break;
1795     case kScrollbarHorizontalThumb:
1796       part_id = SBP_THUMBBTNHORZ;
1797       break;
1798     case kScrollbarVerticalThumb:
1799       part_id = SBP_THUMBBTNVERT;
1800       break;
1801     default:
1802       NOTREACHED() << "Invalid part: " << part;
1803       break;
1804   }
1805   return part_id;
1806 }
1807
1808 int NativeThemeWin::GetWindowsState(Part part,
1809                                     State state,
1810                                     const ExtraParams& extra) {
1811   int state_id;
1812   switch (part) {
1813     case kCheckbox:
1814       switch (state) {
1815         case kNormal:
1816           state_id = CBS_UNCHECKEDNORMAL;
1817           break;
1818         case kHovered:
1819           state_id = CBS_UNCHECKEDHOT;
1820           break;
1821         case kPressed:
1822           state_id = CBS_UNCHECKEDPRESSED;
1823           break;
1824         case kDisabled:
1825           state_id = CBS_UNCHECKEDDISABLED;
1826           break;
1827         default:
1828           NOTREACHED() << "Invalid state: " << state;
1829           break;
1830       }
1831       break;
1832     case kMenuCheck:
1833       switch (state) {
1834         case kNormal:
1835         case kHovered:
1836         case kPressed:
1837           state_id = extra.menu_check.is_radio ? MC_BULLETNORMAL
1838                                                : MC_CHECKMARKNORMAL;
1839           break;
1840         case kDisabled:
1841           state_id = extra.menu_check.is_radio ? MC_BULLETDISABLED
1842                                                : MC_CHECKMARKDISABLED;
1843           break;
1844         default:
1845           NOTREACHED() << "Invalid state: " << state;
1846           break;
1847       }
1848       break;
1849     case kMenuPopupArrow:
1850     case kMenuPopupGutter:
1851     case kMenuPopupSeparator:
1852       switch (state) {
1853         case kNormal:
1854           state_id = MBI_NORMAL;
1855           break;
1856         case kHovered:
1857           state_id = MBI_HOT;
1858           break;
1859         case kPressed:
1860           state_id = MBI_PUSHED;
1861           break;
1862         case kDisabled:
1863           state_id = MBI_DISABLED;
1864           break;
1865         default:
1866           NOTREACHED() << "Invalid state: " << state;
1867           break;
1868       }
1869       break;
1870     case kPushButton:
1871       switch (state) {
1872         case kNormal:
1873           state_id = PBS_NORMAL;
1874           break;
1875         case kHovered:
1876           state_id = PBS_HOT;
1877           break;
1878         case kPressed:
1879           state_id = PBS_PRESSED;
1880           break;
1881         case kDisabled:
1882           state_id = PBS_DISABLED;
1883           break;
1884         default:
1885           NOTREACHED() << "Invalid state: " << state;
1886           break;
1887       }
1888       break;
1889     case kRadio:
1890       switch (state) {
1891         case kNormal:
1892           state_id = RBS_UNCHECKEDNORMAL;
1893           break;
1894         case kHovered:
1895           state_id = RBS_UNCHECKEDHOT;
1896           break;
1897         case kPressed:
1898           state_id = RBS_UNCHECKEDPRESSED;
1899           break;
1900         case kDisabled:
1901           state_id = RBS_UNCHECKEDDISABLED;
1902           break;
1903         default:
1904           NOTREACHED() << "Invalid state: " << state;
1905           break;
1906       }
1907       break;
1908     case kWindowResizeGripper:
1909       switch (state) {
1910         case kNormal:
1911         case kHovered:
1912         case kPressed:
1913         case kDisabled:
1914           state_id = 1;  // gripper has no windows state
1915           break;
1916         default:
1917           NOTREACHED() << "Invalid state: " << state;
1918           break;
1919       }
1920       break;
1921     case kScrollbarDownArrow:
1922       switch (state) {
1923         case kNormal:
1924           state_id = ABS_DOWNNORMAL;
1925           break;
1926         case kHovered:
1927           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1928           state_id = base::win::GetVersion() < base::win::VERSION_VISTA ?
1929               ABS_DOWNHOT : ABS_DOWNHOVER;
1930           break;
1931         case kPressed:
1932           state_id = ABS_DOWNPRESSED;
1933           break;
1934         case kDisabled:
1935           state_id = ABS_DOWNDISABLED;
1936           break;
1937         default:
1938           NOTREACHED() << "Invalid state: " << state;
1939           break;
1940       }
1941       break;
1942     case kScrollbarLeftArrow:
1943       switch (state) {
1944         case kNormal:
1945           state_id = ABS_LEFTNORMAL;
1946           break;
1947         case kHovered:
1948           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1949           state_id = base::win::GetVersion() < base::win::VERSION_VISTA ?
1950               ABS_LEFTHOT : ABS_LEFTHOVER;
1951           break;
1952         case kPressed:
1953           state_id = ABS_LEFTPRESSED;
1954           break;
1955         case kDisabled:
1956           state_id = ABS_LEFTDISABLED;
1957           break;
1958         default:
1959           NOTREACHED() << "Invalid state: " << state;
1960           break;
1961       }
1962       break;
1963     case kScrollbarRightArrow:
1964       switch (state) {
1965         case kNormal:
1966           state_id = ABS_RIGHTNORMAL;
1967           break;
1968         case kHovered:
1969           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1970           state_id = base::win::GetVersion() < base::win::VERSION_VISTA ?
1971               ABS_RIGHTHOT : ABS_RIGHTHOVER;
1972           break;
1973         case kPressed:
1974           state_id = ABS_RIGHTPRESSED;
1975           break;
1976         case kDisabled:
1977           state_id = ABS_RIGHTDISABLED;
1978           break;
1979         default:
1980           NOTREACHED() << "Invalid state: " << state;
1981           break;
1982       }
1983       break;
1984     case kScrollbarUpArrow:
1985       switch (state) {
1986         case kNormal:
1987           state_id = ABS_UPNORMAL;
1988           break;
1989         case kHovered:
1990           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1991           state_id = base::win::GetVersion() < base::win::VERSION_VISTA ?
1992               ABS_UPHOT : ABS_UPHOVER;
1993           break;
1994         case kPressed:
1995           state_id = ABS_UPPRESSED;
1996           break;
1997         case kDisabled:
1998           state_id = ABS_UPDISABLED;
1999           break;
2000         default:
2001           NOTREACHED() << "Invalid state: " << state;
2002           break;
2003       }
2004       break;
2005     case kScrollbarHorizontalThumb:
2006     case kScrollbarVerticalThumb:
2007       switch (state) {
2008         case kNormal:
2009           state_id = SCRBS_NORMAL;
2010           break;
2011         case kHovered:
2012           // Mimic WebKit's behaviour in ScrollbarThemeChromiumWin.cpp.
2013           state_id = base::win::GetVersion() < base::win::VERSION_VISTA ?
2014               SCRBS_HOT : SCRBS_HOVER;
2015           break;
2016         case kPressed:
2017           state_id = SCRBS_PRESSED;
2018           break;
2019         case kDisabled:
2020           state_id = SCRBS_DISABLED;
2021           break;
2022         default:
2023           NOTREACHED() << "Invalid state: " << state;
2024           break;
2025       }
2026       break;
2027     default:
2028       NOTREACHED() << "Invalid part: " << part;
2029       break;
2030   }
2031   return state_id;
2032 }
2033
2034 HRESULT NativeThemeWin::GetThemeInt(ThemeName theme,
2035                                     int part_id,
2036                                     int state_id,
2037                                     int prop_id,
2038                                     int *value) const {
2039   HANDLE handle = GetThemeHandle(theme);
2040   if (handle && get_theme_int_)
2041     return get_theme_int_(handle, part_id, state_id, prop_id, value);
2042   return E_NOTIMPL;
2043 }
2044
2045 HRESULT NativeThemeWin::PaintFrameControl(HDC hdc,
2046                                           const gfx::Rect& rect,
2047                                           UINT type,
2048                                           UINT state,
2049                                           bool is_selected,
2050                                           State control_state) const {
2051   const int width = rect.width();
2052   const int height = rect.height();
2053
2054   // DrawFrameControl for menu arrow/check wants a monochrome bitmap.
2055   base::win::ScopedBitmap mask_bitmap(CreateBitmap(width, height, 1, 1, NULL));
2056
2057   if (mask_bitmap == NULL)
2058     return E_OUTOFMEMORY;
2059
2060   base::win::ScopedCreateDC bitmap_dc(CreateCompatibleDC(NULL));
2061   base::win::ScopedSelectObject select_bitmap(bitmap_dc, mask_bitmap);
2062   RECT local_rect = { 0, 0, width, height };
2063   DrawFrameControl(bitmap_dc, &local_rect, type, state);
2064
2065   // We're going to use BitBlt with a b&w mask. This results in using the dest
2066   // dc's text color for the black bits in the mask, and the dest dc's
2067   // background color for the white bits in the mask. DrawFrameControl draws the
2068   // check in black, and the background in white.
2069   int bg_color_key;
2070   int text_color_key;
2071   switch (control_state) {
2072     case NativeTheme::kHovered:
2073       bg_color_key = COLOR_HIGHLIGHT;
2074       text_color_key = COLOR_HIGHLIGHTTEXT;
2075       break;
2076     case NativeTheme::kNormal:
2077       bg_color_key = COLOR_MENU;
2078       text_color_key = COLOR_MENUTEXT;
2079       break;
2080     case NativeTheme::kDisabled:
2081       bg_color_key = is_selected ? COLOR_HIGHLIGHT : COLOR_MENU;
2082       text_color_key = COLOR_GRAYTEXT;
2083       break;
2084     default:
2085       NOTREACHED();
2086       bg_color_key = COLOR_MENU;
2087       text_color_key = COLOR_MENUTEXT;
2088       break;
2089   }
2090   COLORREF old_bg_color = SetBkColor(hdc, GetSysColor(bg_color_key));
2091   COLORREF old_text_color = SetTextColor(hdc, GetSysColor(text_color_key));
2092   BitBlt(hdc, rect.x(), rect.y(), width, height, bitmap_dc, 0, 0, SRCCOPY);
2093   SetBkColor(hdc, old_bg_color);
2094   SetTextColor(hdc, old_text_color);
2095
2096   return S_OK;
2097 }
2098
2099 HANDLE NativeThemeWin::GetThemeHandle(ThemeName theme_name) const {
2100   if (!open_theme_ || theme_name < 0 || theme_name >= LAST)
2101     return 0;
2102
2103   if (theme_handles_[theme_name])
2104     return theme_handles_[theme_name];
2105
2106   // Not found, try to load it.
2107   HANDLE handle = 0;
2108   switch (theme_name) {
2109   case BUTTON:
2110     handle = open_theme_(NULL, L"Button");
2111     break;
2112   case LIST:
2113     handle = open_theme_(NULL, L"Listview");
2114     break;
2115   case MENU:
2116     handle = open_theme_(NULL, L"Menu");
2117     break;
2118   case MENULIST:
2119     handle = open_theme_(NULL, L"Combobox");
2120     break;
2121   case SCROLLBAR:
2122     handle = open_theme_(NULL, L"Scrollbar");
2123     break;
2124   case STATUS:
2125     handle = open_theme_(NULL, L"Status");
2126     break;
2127   case TAB:
2128     handle = open_theme_(NULL, L"Tab");
2129     break;
2130   case TEXTFIELD:
2131     handle = open_theme_(NULL, L"Edit");
2132     break;
2133   case TRACKBAR:
2134     handle = open_theme_(NULL, L"Trackbar");
2135     break;
2136   case WINDOW:
2137     handle = open_theme_(NULL, L"Window");
2138     break;
2139   case PROGRESS:
2140     handle = open_theme_(NULL, L"Progress");
2141     break;
2142   case SPIN:
2143     handle = open_theme_(NULL, L"Spin");
2144     break;
2145   default:
2146     NOTREACHED();
2147   }
2148   theme_handles_[theme_name] = handle;
2149   return handle;
2150 }
2151
2152 }  // namespace ui