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_ptr.h"
  15 #include "base/win/scoped_gdi_object.h"
  16 #include "base/win/scoped_hdc.h"
  17 #include "base/win/scoped_select_object.h"
  18 #include "base/win/windows_version.h"
  19 #include "skia/ext/bitmap_platform_device.h"
  20 #include "skia/ext/platform_canvas.h"
  21 #include "skia/ext/skia_utils_win.h"
  22 #include "third_party/skia/include/core/SkCanvas.h"
  23 #include "third_party/skia/include/core/SkColor.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/geometry/rect.h"
  29 #include "ui/gfx/geometry/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 // Windows system color IDs cached and updated by the native theme.
  41 const int kSystemColors[] = {
  42   COLOR_3DFACE,
  43   COLOR_BTNTEXT,
  44   COLOR_GRAYTEXT,
  45   COLOR_HIGHLIGHT,
  46   COLOR_HIGHLIGHTTEXT,
  47   COLOR_SCROLLBAR,
  48   COLOR_WINDOW,
  49   COLOR_WINDOWTEXT,
  50   COLOR_BTNFACE,
  51   COLOR_MENUHIGHLIGHT,
  52 };
  53
  54 void SetCheckerboardShader(SkPaint* paint, const RECT& align_rect) {
  55   // Create a 2x2 checkerboard pattern using the 3D face and highlight colors.
  56   const SkColor face = color_utils::GetSysSkColor(COLOR_3DFACE);
  57   const SkColor highlight = color_utils::GetSysSkColor(COLOR_3DHILIGHT);
  58   SkColor buffer[] = { face, highlight, highlight, face };
  59   // Confusing bit: we first create a temporary bitmap with our desired pattern,
  60   // then copy it to another bitmap.  The temporary bitmap doesn't take
  61   // ownership of the pixel data, and so will point to garbage when this
  62   // function returns.  The copy will copy the pixel data into a place owned by
  63   // the bitmap, which is in turn owned by the shader, etc., so it will live
  64   // until we're done using it.
  65   SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2);
  66   SkBitmap temp_bitmap;
  67   temp_bitmap.installPixels(info, buffer, info.minRowBytes());
  68   SkBitmap bitmap;
  69   temp_bitmap.copyTo(&bitmap);
  70
  71   // Align the pattern with the upper corner of |align_rect|.
  72   SkMatrix local_matrix;
  73   local_matrix.setTranslate(SkIntToScalar(align_rect.left),
  74                             SkIntToScalar(align_rect.top));
  75   skia::RefPtr<SkShader> shader =
  76       skia::AdoptRef(SkShader::CreateBitmapShader(bitmap,
  77                                                   SkShader::kRepeat_TileMode,
  78                                                   SkShader::kRepeat_TileMode,
  79                                                   &local_matrix));
  80   paint->setShader(shader.get());
  81 }
  82
  83 //    <-a->
  84 // [  *****             ]
  85 //  ____ |              |
  86 //  <-a-> <------b----->
  87 // a: object_width
  88 // b: frame_width
  89 // *: animating object
  90 //
  91 // - the animation goes from "[" to "]" repeatedly.
  92 // - the animation offset is at first "|"
  93 //
  94 int ComputeAnimationProgress(int frame_width,
  95                              int object_width,
  96                              int pixels_per_second,
  97                              double animated_seconds) {
  98   int animation_width = frame_width + object_width;
  99   double interval = static_cast<double>(animation_width) / pixels_per_second;
 100   double ratio = fmod(animated_seconds, interval) / interval;
 101   return static_cast<int>(animation_width * ratio) - object_width;
 102 }
 103
 104 RECT InsetRect(const RECT* rect, int size) {
 105   gfx::Rect result(*rect);
 106   result.Inset(size, size);
 107   return result.ToRECT();
 108 }
 109
 110 }  // namespace
 111
 112 namespace ui {
 113
 114 bool NativeThemeWin::IsThemingActive() const {
 115   return is_theme_active_ && is_theme_active_();
 116 }
 117
 118 bool NativeThemeWin::IsUsingHighContrastTheme() const {
 119   if (is_using_high_contrast_valid_)
 120     return is_using_high_contrast_;
 121   HIGHCONTRAST result;
 122   result.cbSize = sizeof(HIGHCONTRAST);
 123   is_using_high_contrast_ =
 124       SystemParametersInfo(SPI_GETHIGHCONTRAST, result.cbSize, &result, 0) &&
 125       (result.dwFlags & HCF_HIGHCONTRASTON) == HCF_HIGHCONTRASTON;
 126   is_using_high_contrast_valid_ = true;
 127   return is_using_high_contrast_;
 128 }
 129
 130 HRESULT NativeThemeWin::GetThemeColor(ThemeName theme,
 131                                       int part_id,
 132                                       int state_id,
 133                                       int prop_id,
 134                                       SkColor* color) const {
 135   HANDLE handle = GetThemeHandle(theme);
 136   if (!handle || !get_theme_color_)
 137     return E_NOTIMPL;
 138   COLORREF color_ref;
 139   if (get_theme_color_(handle, part_id, state_id, prop_id, &color_ref) != S_OK)
 140     return E_NOTIMPL;
 141   *color = skia::COLORREFToSkColor(color_ref);
 142   return S_OK;
 143 }
 144
 145 SkColor NativeThemeWin::GetThemeColorWithDefault(ThemeName theme,
 146                                                  int part_id,
 147                                                  int state_id,
 148                                                  int prop_id,
 149                                                  int default_sys_color) const {
 150   SkColor color;
 151   return (GetThemeColor(theme, part_id, state_id, prop_id, &color) == S_OK) ?
 152       color : color_utils::GetSysSkColor(default_sys_color);
 153 }
 154
 155 gfx::Size NativeThemeWin::GetThemeBorderSize(ThemeName theme) const {
 156   // For simplicity use the wildcard state==0, part==0, since it works
 157   // for the cases we currently depend on.
 158   int border;
 159   return (GetThemeInt(theme, 0, 0, TMT_BORDERSIZE, &border) == S_OK) ?
 160       gfx::Size(border, border) :
 161       gfx::Size(GetSystemMetrics(SM_CXEDGE), GetSystemMetrics(SM_CYEDGE));
 162 }
 163
 164 void NativeThemeWin::DisableTheming() const {
 165   if (set_theme_properties_)
 166     set_theme_properties_(0);
 167 }
 168
 169 void NativeThemeWin::CloseHandles() const {
 170   if (!close_theme_)
 171     return;
 172
 173   for (int i = 0; i < LAST; ++i) {
 174     if (theme_handles_[i]) {
 175       close_theme_(theme_handles_[i]);
 176       theme_handles_[i] = NULL;
 177     }
 178   }
 179 }
 180
 181 bool NativeThemeWin::IsClassicTheme(ThemeName name) const {
 182   return !theme_dll_ || !GetThemeHandle(name);
 183 }
 184
 185 // static
 186 NativeThemeWin* NativeThemeWin::instance() {
 187   CR_DEFINE_STATIC_LOCAL(NativeThemeWin, s_native_theme, ());
 188   return &s_native_theme;
 189 }
 190
 191 gfx::Size NativeThemeWin::GetPartSize(Part part,
 192                                       State state,
 193                                       const ExtraParams& extra) const {
 194   gfx::Size part_size = CommonThemeGetPartSize(part, state, extra);
 195   if (!part_size.IsEmpty())
 196     return part_size;
 197
 198   // The GetThemePartSize call below returns the default size without
 199   // accounting for user customization (crbug/218291).
 200   switch (part) {
 201     case kScrollbarDownArrow:
 202     case kScrollbarLeftArrow:
 203     case kScrollbarRightArrow:
 204     case kScrollbarUpArrow:
 205     case kScrollbarHorizontalThumb:
 206     case kScrollbarVerticalThumb:
 207     case kScrollbarHorizontalTrack:
 208     case kScrollbarVerticalTrack: {
 209       int size = gfx::win::GetSystemMetricsInDIP(SM_CXVSCROLL);
 210       if (size == 0)
 211         size = 17;
 212       return gfx::Size(size, size);
 213     }
 214     default:
 215       break;
 216   }
 217
 218   int part_id = GetWindowsPart(part, state, extra);
 219   int state_id = GetWindowsState(part, state, extra);
 220
 221   base::win::ScopedGetDC screen_dc(NULL);
 222   SIZE size;
 223   if (SUCCEEDED(GetThemePartSize(GetThemeName(part), screen_dc, part_id,
 224                                  state_id, NULL, TS_TRUE, &size)))
 225     return gfx::Size(size.cx, size.cy);
 226
 227   // TODO(rogerta): For now, we need to support radio buttons and checkboxes
 228   // when theming is not enabled.  Support for other parts can be added
 229   // if/when needed.
 230   return (part == kCheckbox || part == kRadio) ?
 231       gfx::Size(13, 13) : gfx::Size();
 232 }
 233
 234 void NativeThemeWin::Paint(SkCanvas* canvas,
 235                            Part part,
 236                            State state,
 237                            const gfx::Rect& rect,
 238                            const ExtraParams& extra) const {
 239   if (rect.IsEmpty())
 240     return;
 241
 242   switch (part) {
 243     case kComboboxArrow:
 244       CommonThemePaintComboboxArrow(canvas, rect);
 245       return;
 246     case kMenuPopupGutter:
 247       CommonThemePaintMenuGutter(canvas, rect);
 248       return;
 249     case kMenuPopupSeparator:
 250       CommonThemePaintMenuSeparator(canvas, rect);
 251       return;
 252     case kMenuPopupBackground:
 253       CommonThemePaintMenuBackground(canvas, rect);
 254       return;
 255     case kMenuItemBackground:
 256       CommonThemePaintMenuItemBackground(canvas, state, rect);
 257       return;
 258     default:
 259       break;
 260   }
 261
 262   bool needs_paint_indirect = false;
 263   if (!skia::SupportsPlatformPaint(canvas)) {
 264     // This block will only get hit with --enable-accelerated-drawing flag.
 265     needs_paint_indirect = true;
 266   } else {
 267     // Scrollbar components on Windows Classic theme (on all Windows versions)
 268     // have particularly problematic alpha values, so always draw them
 269     // indirectly. In addition, scrollbar thumbs and grippers for the Windows XP
 270     // theme (available only on Windows XP) also need their alpha values
 271     // fixed.
 272     switch (part) {
 273       case kScrollbarDownArrow:
 274       case kScrollbarUpArrow:
 275       case kScrollbarLeftArrow:
 276       case kScrollbarRightArrow:
 277         needs_paint_indirect = !GetThemeHandle(SCROLLBAR);
 278         break;
 279       case kScrollbarHorizontalThumb:
 280       case kScrollbarVerticalThumb:
 281       case kScrollbarHorizontalGripper:
 282       case kScrollbarVerticalGripper:
 283         needs_paint_indirect = !GetThemeHandle(SCROLLBAR) ||
 284             base::win::GetVersion() == base::win::VERSION_XP;
 285         break;
 286       default:
 287         break;
 288     }
 289   }
 290
 291   if (needs_paint_indirect)
 292     PaintIndirect(canvas, part, state, rect, extra);
 293   else
 294     PaintDirect(canvas, part, state, rect, extra);
 295 }
 296
 297 NativeThemeWin::NativeThemeWin()
 298     : theme_dll_(LoadLibrary(L"uxtheme.dll")),
 299       draw_theme_(NULL),
 300       draw_theme_ex_(NULL),
 301       get_theme_color_(NULL),
 302       get_theme_content_rect_(NULL),
 303       get_theme_part_size_(NULL),
 304       open_theme_(NULL),
 305       close_theme_(NULL),
 306       set_theme_properties_(NULL),
 307       is_theme_active_(NULL),
 308       get_theme_int_(NULL),
 309       color_change_listener_(this),
 310       is_using_high_contrast_(false),
 311       is_using_high_contrast_valid_(false) {
 312   if (theme_dll_) {
 313     draw_theme_ = reinterpret_cast<DrawThemeBackgroundPtr>(
 314         GetProcAddress(theme_dll_, "DrawThemeBackground"));
 315     draw_theme_ex_ = reinterpret_cast<DrawThemeBackgroundExPtr>(
 316         GetProcAddress(theme_dll_, "DrawThemeBackgroundEx"));
 317     get_theme_color_ = reinterpret_cast<GetThemeColorPtr>(
 318         GetProcAddress(theme_dll_, "GetThemeColor"));
 319     get_theme_content_rect_ = reinterpret_cast<GetThemeContentRectPtr>(
 320         GetProcAddress(theme_dll_, "GetThemeBackgroundContentRect"));
 321     get_theme_part_size_ = reinterpret_cast<GetThemePartSizePtr>(
 322         GetProcAddress(theme_dll_, "GetThemePartSize"));
 323     open_theme_ = reinterpret_cast<OpenThemeDataPtr>(
 324         GetProcAddress(theme_dll_, "OpenThemeData"));
 325     close_theme_ = reinterpret_cast<CloseThemeDataPtr>(
 326         GetProcAddress(theme_dll_, "CloseThemeData"));
 327     set_theme_properties_ = reinterpret_cast<SetThemeAppPropertiesPtr>(
 328         GetProcAddress(theme_dll_, "SetThemeAppProperties"));
 329     is_theme_active_ = reinterpret_cast<IsThemeActivePtr>(
 330         GetProcAddress(theme_dll_, "IsThemeActive"));
 331     get_theme_int_ = reinterpret_cast<GetThemeIntPtr>(
 332         GetProcAddress(theme_dll_, "GetThemeInt"));
 333   }
 334   memset(theme_handles_, 0, sizeof(theme_handles_));
 335
 336   // Initialize the cached system colors.
 337   UpdateSystemColors();
 338 }
 339
 340 NativeThemeWin::~NativeThemeWin() {
 341   if (theme_dll_) {
 342     // todo (cpu): fix this soon.  Making a call to CloseHandles() here breaks
 343     // certain tests and the reliability bots.
 344     // CloseHandles();
 345     FreeLibrary(theme_dll_);
 346   }
 347 }
 348
 349 void NativeThemeWin::OnSysColorChange() {
 350   UpdateSystemColors();
 351   is_using_high_contrast_valid_ = false;
 352   NotifyObservers();
 353 }
 354
 355 void NativeThemeWin::UpdateSystemColors() {
 356   for (int i = 0; i < arraysize(kSystemColors); ++i) {
 357     system_colors_[kSystemColors[i]] =
 358         color_utils::GetSysSkColor(kSystemColors[i]);
 359   }
 360 }
 361
 362 void NativeThemeWin::PaintDirect(SkCanvas* canvas,
 363                                  Part part,
 364                                  State state,
 365                                  const gfx::Rect& rect,
 366                                  const ExtraParams& extra) const {
 367   skia::ScopedPlatformPaint scoped_platform_paint(canvas);
 368   HDC hdc = scoped_platform_paint.GetPlatformSurface();
 369
 370   switch (part) {
 371     case kCheckbox:
 372       PaintCheckbox(hdc, part, state, rect, extra.button);
 373       return;
 374     case kInnerSpinButton:
 375       PaintSpinButton(hdc, part, state, rect, extra.inner_spin);
 376       return;
 377     case kMenuList:
 378       PaintMenuList(hdc, state, rect, extra.menu_list);
 379       return;
 380     case kMenuCheck:
 381       PaintMenuCheck(hdc, state, rect, extra.menu_check);
 382       return;
 383     case kMenuCheckBackground:
 384       PaintMenuCheckBackground(hdc, state, rect);
 385       return;
 386     case kMenuPopupArrow:
 387       PaintMenuArrow(hdc, state, rect, extra.menu_arrow);
 388       return;
 389     case kMenuPopupBackground:
 390       PaintMenuBackground(hdc, rect);
 391       return;
 392     case kMenuPopupGutter:
 393       PaintMenuGutter(hdc, rect);
 394       return;
 395     case kMenuPopupSeparator:
 396       PaintMenuSeparator(hdc, rect);
 397       return;
 398     case kMenuItemBackground:
 399       PaintMenuItemBackground(hdc, state, rect, extra.menu_item);
 400       return;
 401     case kProgressBar:
 402       PaintProgressBar(hdc, rect, extra.progress_bar);
 403       return;
 404     case kPushButton:
 405       PaintPushButton(hdc, part, state, rect, extra.button);
 406       return;
 407     case kRadio:
 408       PaintRadioButton(hdc, part, state, rect, extra.button);
 409       return;
 410     case kScrollbarDownArrow:
 411     case kScrollbarUpArrow:
 412     case kScrollbarLeftArrow:
 413     case kScrollbarRightArrow:
 414       PaintScrollbarArrow(hdc, part, state, rect, extra.scrollbar_arrow);
 415       return;
 416     case kScrollbarHorizontalThumb:
 417     case kScrollbarVerticalThumb:
 418     case kScrollbarHorizontalGripper:
 419     case kScrollbarVerticalGripper:
 420       PaintScrollbarThumb(hdc, part, state, rect, extra.scrollbar_thumb);
 421       return;
 422     case kScrollbarHorizontalTrack:
 423     case kScrollbarVerticalTrack:
 424       PaintScrollbarTrack(canvas, hdc, part, state, rect,
 425                           extra.scrollbar_track);
 426       return;
 427     case kScrollbarCorner:
 428       canvas->drawColor(SK_ColorWHITE, SkXfermode::kSrc_Mode);
 429       return;
 430     case kTabPanelBackground:
 431       PaintTabPanelBackground(hdc, rect);
 432       return;
 433     case kTextField:
 434       PaintTextField(hdc, part, state, rect, extra.text_field);
 435       return;
 436     case kTrackbarThumb:
 437     case kTrackbarTrack:
 438       PaintTrackbar(canvas, hdc, part, state, rect, extra.trackbar);
 439       return;
 440     case kWindowResizeGripper:
 441       PaintWindowResizeGripper(hdc, rect);
 442       return;
 443     case kComboboxArrow:
 444     case kSliderTrack:
 445     case kSliderThumb:
 446     case kMaxPart:
 447       NOTREACHED();
 448   }
 449 }
 450
 451 SkColor NativeThemeWin::GetSystemColor(ColorId color_id) const {
 452   SkColor color;
 453   if (CommonThemeGetSystemColor(color_id, &color))
 454     return color;
 455
 456   // TODO: Obtain the correct colors using GetSysColor.
 457   const SkColor kInvalidColorIdColor = SkColorSetRGB(255, 0, 128);
 458   const SkColor kUrlTextColor = SkColorSetRGB(0x0b, 0x80, 0x43);
 459   // Dialogs:
 460   const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
 461   // FocusableBorder:
 462   const SkColor kFocusedBorderColor = SkColorSetRGB(0x4d, 0x90, 0xfe);
 463   const SkColor kUnfocusedBorderColor = SkColorSetRGB(0xd9, 0xd9, 0xd9);
 464   // Button:
 465   const SkColor kButtonBackgroundColor = SkColorSetRGB(0xde, 0xde, 0xde);
 466   const SkColor kButtonHighlightColor = SkColorSetARGB(200, 255, 255, 255);
 467   const SkColor kButtonHoverColor = SkColorSetRGB(6, 45, 117);
 468   const SkColor kButtonHoverBackgroundColor = SkColorSetRGB(0xEA, 0xEA, 0xEA);
 469   // MenuItem:
 470   const SkColor kEnabledMenuItemForegroundColor = SkColorSetRGB(6, 45, 117);
 471   const SkColor kDisabledMenuItemForegroundColor = SkColorSetRGB(161, 161, 146);
 472   const SkColor kFocusedMenuItemBackgroundColor = SkColorSetRGB(246, 249, 253);
 473   const SkColor kMenuSeparatorColor = SkColorSetARGB(50, 0, 0, 0);
 474   // Table:
 475   const SkColor kPositiveTextColor = SkColorSetRGB(0x0b, 0x80, 0x43);
 476   const SkColor kNegativeTextColor = SkColorSetRGB(0xc5, 0x39, 0x29);
 477
 478   switch (color_id) {
 479     // Windows
 480     case kColorId_WindowBackground:
 481       return system_colors_[COLOR_WINDOW];
 482
 483     // Dialogs
 484     case kColorId_DialogBackground:
 485       return gfx::IsInvertedColorScheme() ?
 486           color_utils::InvertColor(kDialogBackgroundColor) :
 487           kDialogBackgroundColor;
 488
 489     // FocusableBorder
 490     case kColorId_FocusedBorderColor:
 491       return kFocusedBorderColor;
 492     case kColorId_UnfocusedBorderColor:
 493       return kUnfocusedBorderColor;
 494
 495     // Button
 496     case kColorId_ButtonBackgroundColor:
 497       return kButtonBackgroundColor;
 498     case kColorId_ButtonEnabledColor:
 499       return system_colors_[COLOR_BTNTEXT];
 500     case kColorId_ButtonDisabledColor:
 501       return system_colors_[COLOR_GRAYTEXT];
 502     case kColorId_ButtonHighlightColor:
 503       return kButtonHighlightColor;
 504     case kColorId_ButtonHoverColor:
 505       return kButtonHoverColor;
 506     case kColorId_ButtonHoverBackgroundColor:
 507       return kButtonHoverBackgroundColor;
 508     case kColorId_BlueButtonEnabledColor:
 509     case kColorId_BlueButtonDisabledColor:
 510     case kColorId_BlueButtonPressedColor:
 511     case kColorId_BlueButtonHoverColor:
 512       NOTREACHED();
 513       return kInvalidColorIdColor;
 514
 515     // MenuItem
 516     case kColorId_EnabledMenuItemForegroundColor:
 517       return kEnabledMenuItemForegroundColor;
 518     case kColorId_DisabledMenuItemForegroundColor:
 519       return kDisabledMenuItemForegroundColor;
 520     case kColorId_DisabledEmphasizedMenuItemForegroundColor:
 521       return SK_ColorBLACK;
 522     case kColorId_FocusedMenuItemBackgroundColor:
 523       return kFocusedMenuItemBackgroundColor;
 524     case kColorId_MenuSeparatorColor:
 525       return kMenuSeparatorColor;
 526     case kColorId_SelectedMenuItemForegroundColor:
 527     case kColorId_HoverMenuItemBackgroundColor:
 528     case kColorId_MenuBackgroundColor:
 529     case kColorId_MenuBorderColor:
 530       NOTREACHED();
 531       return kInvalidColorIdColor;
 532
 533     // MenuButton
 534     case kColorId_EnabledMenuButtonBorderColor:
 535     case kColorId_FocusedMenuButtonBorderColor:
 536     case kColorId_HoverMenuButtonBorderColor:
 537       NOTREACHED();
 538       return kInvalidColorIdColor;
 539
 540     // Label
 541     case kColorId_LabelEnabledColor:
 542       return system_colors_[COLOR_BTNTEXT];
 543     case kColorId_LabelDisabledColor:
 544       return system_colors_[COLOR_GRAYTEXT];
 545     case kColorId_LabelBackgroundColor:
 546       return system_colors_[COLOR_WINDOW];
 547
 548     // Textfield
 549     case kColorId_TextfieldDefaultColor:
 550       return system_colors_[COLOR_WINDOWTEXT];
 551     case kColorId_TextfieldDefaultBackground:
 552       return system_colors_[COLOR_WINDOW];
 553     case kColorId_TextfieldReadOnlyColor:
 554       return system_colors_[COLOR_GRAYTEXT];
 555     case kColorId_TextfieldReadOnlyBackground:
 556       return system_colors_[COLOR_3DFACE];
 557     case kColorId_TextfieldSelectionColor:
 558       return system_colors_[COLOR_HIGHLIGHTTEXT];
 559     case kColorId_TextfieldSelectionBackgroundFocused:
 560       return system_colors_[COLOR_HIGHLIGHT];
 561
 562     // Tooltip
 563     case kColorId_TooltipBackground:
 564     case kColorId_TooltipText:
 565       NOTREACHED();
 566       return kInvalidColorIdColor;
 567
 568     // Tree
 569     // NOTE: these aren't right for all themes, but as close as I could get.
 570     case kColorId_TreeBackground:
 571       return system_colors_[COLOR_WINDOW];
 572     case kColorId_TreeText:
 573       return system_colors_[COLOR_WINDOWTEXT];
 574     case kColorId_TreeSelectedText:
 575       return system_colors_[COLOR_HIGHLIGHTTEXT];
 576     case kColorId_TreeSelectedTextUnfocused:
 577       return system_colors_[COLOR_BTNTEXT];
 578     case kColorId_TreeSelectionBackgroundFocused:
 579       return system_colors_[COLOR_HIGHLIGHT];
 580     case kColorId_TreeSelectionBackgroundUnfocused:
 581       return system_colors_[IsUsingHighContrastTheme() ?
 582                               COLOR_MENUHIGHLIGHT : COLOR_BTNFACE];
 583     case kColorId_TreeArrow:
 584       return system_colors_[COLOR_WINDOWTEXT];
 585
 586     // Table
 587     case kColorId_TableBackground:
 588       return system_colors_[COLOR_WINDOW];
 589     case kColorId_TableText:
 590       return system_colors_[COLOR_WINDOWTEXT];
 591     case kColorId_TableSelectedText:
 592       return system_colors_[COLOR_HIGHLIGHTTEXT];
 593     case kColorId_TableSelectedTextUnfocused:
 594       return system_colors_[COLOR_BTNTEXT];
 595     case kColorId_TableSelectionBackgroundFocused:
 596       return system_colors_[COLOR_HIGHLIGHT];
 597     case kColorId_TableSelectionBackgroundUnfocused:
 598       return system_colors_[IsUsingHighContrastTheme() ?
 599                               COLOR_MENUHIGHLIGHT : COLOR_BTNFACE];
 600     case kColorId_TableGroupingIndicatorColor:
 601       return system_colors_[COLOR_GRAYTEXT];
 602
 603     // Results Tables
 604     case kColorId_ResultsTableNormalBackground:
 605       return system_colors_[COLOR_WINDOW];
 606     case kColorId_ResultsTableHoveredBackground:
 607       return color_utils::AlphaBlend(system_colors_[COLOR_HIGHLIGHT],
 608                                      system_colors_[COLOR_WINDOW], 0x40);
 609     case kColorId_ResultsTableSelectedBackground:
 610       return system_colors_[COLOR_HIGHLIGHT];
 611     case kColorId_ResultsTableNormalText:
 612       return system_colors_[COLOR_WINDOWTEXT];
 613     case kColorId_ResultsTableHoveredText:
 614       return color_utils::GetReadableColor(
 615           system_colors_[COLOR_WINDOWTEXT],
 616           GetSystemColor(kColorId_ResultsTableHoveredBackground));
 617     case kColorId_ResultsTableSelectedText:
 618       return system_colors_[COLOR_HIGHLIGHTTEXT];
 619     case kColorId_ResultsTableNormalDimmedText:
 620       return color_utils::AlphaBlend(system_colors_[COLOR_WINDOWTEXT],
 621                                      system_colors_[COLOR_WINDOW], 0x80);
 622     case kColorId_ResultsTableHoveredDimmedText:
 623       return color_utils::AlphaBlend(
 624           system_colors_[COLOR_WINDOWTEXT],
 625           GetSystemColor(kColorId_ResultsTableHoveredBackground), 0x80);
 626     case kColorId_ResultsTableSelectedDimmedText:
 627       return color_utils::AlphaBlend(system_colors_[COLOR_HIGHLIGHTTEXT],
 628                                      system_colors_[COLOR_HIGHLIGHT], 0x80);
 629     case kColorId_ResultsTableNormalUrl:
 630       return color_utils::GetReadableColor(kUrlTextColor,
 631                                            system_colors_[COLOR_WINDOW]);
 632     case kColorId_ResultsTableHoveredUrl:
 633       return color_utils::GetReadableColor(
 634           kUrlTextColor,
 635           GetSystemColor(kColorId_ResultsTableHoveredBackground));
 636     case kColorId_ResultsTableSelectedUrl:
 637       return color_utils::GetReadableColor(kUrlTextColor,
 638                                            system_colors_[COLOR_HIGHLIGHT]);
 639     case kColorId_ResultsTableNormalDivider:
 640       return color_utils::AlphaBlend(system_colors_[COLOR_WINDOWTEXT],
 641                                      system_colors_[COLOR_WINDOW], 0x34);
 642     case kColorId_ResultsTableHoveredDivider:
 643       return color_utils::AlphaBlend(
 644           system_colors_[COLOR_WINDOWTEXT],
 645           GetSystemColor(kColorId_ResultsTableHoveredBackground), 0x34);
 646     case kColorId_ResultsTableSelectedDivider:
 647       return color_utils::AlphaBlend(system_colors_[COLOR_HIGHLIGHTTEXT],
 648                                      system_colors_[COLOR_HIGHLIGHT], 0x34);
 649     case kColorId_ResultsTablePositiveText:
 650       return color_utils::GetReadableColor(kPositiveTextColor,
 651                                            system_colors_[COLOR_WINDOW]);
 652     case kColorId_ResultsTablePositiveHoveredText:
 653       return color_utils::GetReadableColor(
 654           kPositiveTextColor,
 655           GetSystemColor(kColorId_ResultsTableHoveredBackground));
 656     case kColorId_ResultsTablePositiveSelectedText:
 657       return color_utils::GetReadableColor(kPositiveTextColor,
 658                                            system_colors_[COLOR_HIGHLIGHT]);
 659     case kColorId_ResultsTableNegativeText:
 660       return color_utils::GetReadableColor(kNegativeTextColor,
 661                                            system_colors_[COLOR_WINDOW]);
 662     case kColorId_ResultsTableNegativeHoveredText:
 663       return color_utils::GetReadableColor(
 664           kNegativeTextColor,
 665           GetSystemColor(kColorId_ResultsTableHoveredBackground));
 666     case kColorId_ResultsTableNegativeSelectedText:
 667       return color_utils::GetReadableColor(kNegativeTextColor,
 668                                            system_colors_[COLOR_HIGHLIGHT]);
 669   }
 670   NOTREACHED();
 671   return kInvalidColorIdColor;
 672 }
 673
 674 void NativeThemeWin::PaintIndirect(SkCanvas* canvas,
 675                                    Part part,
 676                                    State state,
 677                                    const gfx::Rect& rect,
 678                                    const ExtraParams& extra) const {
 679   // TODO(asvitkine): This path is pretty inefficient - for each paint operation
 680   //                  it creates a new offscreen bitmap Skia canvas. This can
 681   //                  be sped up by doing it only once per part/state and
 682   //                  keeping a cache of the resulting bitmaps.
 683
 684   // Create an offscreen canvas that is backed by an HDC.
 685   skia::RefPtr<skia::BitmapPlatformDevice> device = skia::AdoptRef(
 686       skia::BitmapPlatformDevice::Create(
 687           rect.width(), rect.height(), false, NULL));
 688   DCHECK(device);
 689   SkCanvas offscreen_canvas(device.get());
 690   DCHECK(skia::SupportsPlatformPaint(&offscreen_canvas));
 691
 692   // Some of the Windows theme drawing operations do not write correct alpha
 693   // values for fully-opaque pixels; instead the pixels get alpha 0. This is
 694   // especially a problem on Windows XP or when using the Classic theme.
 695   //
 696   // To work-around this, mark all pixels with a placeholder value, to detect
 697   // which pixels get touched by the paint operation. After paint, set any
 698   // pixels that have alpha 0 to opaque and placeholders to fully-transparent.
 699   const SkColor placeholder = SkColorSetARGB(1, 0, 0, 0);
 700   offscreen_canvas.clear(placeholder);
 701
 702   // Offset destination rects to have origin (0,0).
 703   gfx::Rect adjusted_rect(rect.size());
 704   ExtraParams adjusted_extra(extra);
 705   switch (part) {
 706     case kProgressBar:
 707       adjusted_extra.progress_bar.value_rect_x = 0;
 708       adjusted_extra.progress_bar.value_rect_y = 0;
 709       break;
 710     case kScrollbarHorizontalTrack:
 711     case kScrollbarVerticalTrack:
 712       adjusted_extra.scrollbar_track.track_x = 0;
 713       adjusted_extra.scrollbar_track.track_y = 0;
 714       break;
 715     default:
 716       break;
 717   }
 718   // Draw the theme controls using existing HDC-drawing code.
 719   PaintDirect(&offscreen_canvas, part, state, adjusted_rect, adjusted_extra);
 720
 721   // Copy the pixels to a bitmap that has ref-counted pixel storage, which is
 722   // necessary to have when drawing to a SkPicture.
 723   const SkBitmap& hdc_bitmap =
 724       offscreen_canvas.getDevice()->accessBitmap(false);
 725   SkBitmap bitmap;
 726   hdc_bitmap.copyTo(&bitmap, kN32_SkColorType);
 727
 728   // Post-process the pixels to fix up the alpha values (see big comment above).
 729   const SkPMColor placeholder_value = SkPreMultiplyColor(placeholder);
 730   const int pixel_count = rect.width() * rect.height();
 731   SkPMColor* pixels = bitmap.getAddr32(0, 0);
 732   for (int i = 0; i < pixel_count; i++) {
 733     if (pixels[i] == placeholder_value) {
 734       // Pixel wasn't touched - make it fully transparent.
 735       pixels[i] = SkPackARGB32(0, 0, 0, 0);
 736     } else if (SkGetPackedA32(pixels[i]) == 0) {
 737       // Pixel was touched but has incorrect alpha of 0, make it fully opaque.
 738       pixels[i] = SkPackARGB32(0xFF,
 739                                SkGetPackedR32(pixels[i]),
 740                                SkGetPackedG32(pixels[i]),
 741                                SkGetPackedB32(pixels[i]));
 742     }
 743   }
 744
 745   // Draw the offscreen bitmap to the destination canvas.
 746   canvas->drawBitmap(bitmap, rect.x(), rect.y());
 747 }
 748
 749 HRESULT NativeThemeWin::GetThemePartSize(ThemeName theme_name,
 750                                          HDC hdc,
 751                                          int part_id,
 752                                          int state_id,
 753                                          RECT* rect,
 754                                          int ts,
 755                                          SIZE* size) const {
 756   HANDLE handle = GetThemeHandle(theme_name);
 757   return (handle && get_theme_part_size_) ?
 758       get_theme_part_size_(handle, hdc, part_id, state_id, rect, ts, size) :
 759       E_NOTIMPL;
 760 }
 761
 762 HRESULT NativeThemeWin::PaintButton(HDC hdc,
 763                                     State state,
 764                                     const ButtonExtraParams& extra,
 765                                     int part_id,
 766                                     int state_id,
 767                                     RECT* rect) const {
 768   HANDLE handle = GetThemeHandle(BUTTON);
 769   if (handle && draw_theme_)
 770     return draw_theme_(handle, hdc, part_id, state_id, rect, NULL);
 771
 772   // Adjust classic_state based on part, state, and extras.
 773   int classic_state = extra.classic_state;
 774   switch (part_id) {
 775     case BP_CHECKBOX:
 776       classic_state |= DFCS_BUTTONCHECK;
 777       break;
 778     case BP_RADIOBUTTON:
 779       classic_state |= DFCS_BUTTONRADIO;
 780       break;
 781     case BP_PUSHBUTTON:
 782       classic_state |= DFCS_BUTTONPUSH;
 783       break;
 784     default:
 785       NOTREACHED();
 786       break;
 787   }
 788
 789   switch (state) {
 790     case kDisabled:
 791       classic_state |= DFCS_INACTIVE;
 792       break;
 793     case kHovered:
 794     case kNormal:
 795       break;
 796     case kPressed:
 797       classic_state |= DFCS_PUSHED;
 798       break;
 799     case kNumStates:
 800       NOTREACHED();
 801       break;
 802   }
 803
 804   if (extra.checked)
 805     classic_state |= DFCS_CHECKED;
 806
 807   // Draw it manually.
 808   // All pressed states have both low bits set, and no other states do.
 809   const bool focused = ((state_id & ETS_FOCUSED) == ETS_FOCUSED);
 810   const bool pressed = ((state_id & PBS_PRESSED) == PBS_PRESSED);
 811   if ((BP_PUSHBUTTON == part_id) && (pressed || focused)) {
 812     // BP_PUSHBUTTON has a focus rect drawn around the outer edge, and the
 813     // button itself is shrunk by 1 pixel.
 814     HBRUSH brush = GetSysColorBrush(COLOR_3DDKSHADOW);
 815     if (brush) {
 816       FrameRect(hdc, rect, brush);
 817       InflateRect(rect, -1, -1);
 818     }
 819   }
 820   DrawFrameControl(hdc, rect, DFC_BUTTON, classic_state);
 821
 822   // Draw the focus rectangle (the dotted line box) only on buttons.  For radio
 823   // and checkboxes, we let webkit draw the focus rectangle (orange glow).
 824   if ((BP_PUSHBUTTON == part_id) && focused) {
 825     // The focus rect is inside the button.  The exact number of pixels depends
 826     // on whether we're in classic mode or using uxtheme.
 827     if (handle && get_theme_content_rect_) {
 828       get_theme_content_rect_(handle, hdc, part_id, state_id, rect, rect);
 829     } else {
 830       InflateRect(rect, -GetSystemMetrics(SM_CXEDGE),
 831                   -GetSystemMetrics(SM_CYEDGE));
 832     }
 833     DrawFocusRect(hdc, rect);
 834   }
 835
 836   // Classic theme doesn't support indeterminate checkboxes.  We draw
 837   // a recangle inside a checkbox like IE10 does.
 838   if (part_id == BP_CHECKBOX && extra.indeterminate) {
 839     RECT inner_rect = *rect;
 840     // "4 / 13" is same as IE10 in classic theme.
 841     int padding = (inner_rect.right - inner_rect.left) * 4 / 13;
 842     InflateRect(&inner_rect, -padding, -padding);
 843     int color_index = state == kDisabled ? COLOR_GRAYTEXT : COLOR_WINDOWTEXT;
 844     FillRect(hdc, &inner_rect, GetSysColorBrush(color_index));
 845   }
 846
 847   return S_OK;
 848 }
 849
 850 HRESULT NativeThemeWin::PaintMenuSeparator(
 851     HDC hdc,
 852     const gfx::Rect& rect) const {
 853   RECT rect_win = rect.ToRECT();
 854
 855   HANDLE handle = GetThemeHandle(MENU);
 856   if (handle && draw_theme_) {
 857     // Delta is needed for non-classic to move separator up slightly.
 858     --rect_win.top;
 859     --rect_win.bottom;
 860     return draw_theme_(handle, hdc, MENU_POPUPSEPARATOR, MPI_NORMAL, &rect_win,
 861                        NULL);
 862   }
 863
 864   DrawEdge(hdc, &rect_win, EDGE_ETCHED, BF_TOP);
 865   return S_OK;
 866 }
 867
 868 HRESULT NativeThemeWin::PaintMenuGutter(HDC hdc,
 869                                         const gfx::Rect& rect) const {
 870   RECT rect_win = rect.ToRECT();
 871   HANDLE handle = GetThemeHandle(MENU);
 872   return (handle && draw_theme_) ?
 873       draw_theme_(handle, hdc, MENU_POPUPGUTTER, MPI_NORMAL, &rect_win, NULL) :
 874       E_NOTIMPL;
 875 }
 876
 877 HRESULT NativeThemeWin::PaintMenuArrow(
 878     HDC hdc,
 879     State state,
 880     const gfx::Rect& rect,
 881     const MenuArrowExtraParams& extra) const {
 882   int state_id = MSM_NORMAL;
 883   if (state == kDisabled)
 884     state_id = MSM_DISABLED;
 885
 886   HANDLE handle = GetThemeHandle(MENU);
 887   RECT rect_win = rect.ToRECT();
 888   if (handle && draw_theme_) {
 889     if (extra.pointing_right) {
 890       return draw_theme_(handle, hdc, MENU_POPUPSUBMENU, state_id, &rect_win,
 891                          NULL);
 892     }
 893     // There is no way to tell the uxtheme API to draw a left pointing arrow; it
 894     // doesn't have a flag equivalent to DFCS_MENUARROWRIGHT.  But they are
 895     // needed for RTL locales on Vista.  So use a memory DC and mirror the
 896     // region with GDI's StretchBlt.
 897     gfx::Rect r(rect);
 898     base::win::ScopedCreateDC mem_dc(CreateCompatibleDC(hdc));
 899     base::win::ScopedBitmap mem_bitmap(CreateCompatibleBitmap(hdc, r.width(),
 900                                                               r.height()));
 901     base::win::ScopedSelectObject select_bitmap(mem_dc.Get(), mem_bitmap);
 902     // Copy and horizontally mirror the background from hdc into mem_dc. Use
 903     // a negative-width source rect, starting at the rightmost pixel.
 904     StretchBlt(mem_dc.Get(), 0, 0, r.width(), r.height(),
 905                hdc, r.right()-1, r.y(), -r.width(), r.height(), SRCCOPY);
 906     // Draw the arrow.
 907     RECT theme_rect = {0, 0, r.width(), r.height()};
 908     HRESULT result = draw_theme_(handle, mem_dc.Get(), MENU_POPUPSUBMENU,
 909                                   state_id, &theme_rect, NULL);
 910     // Copy and mirror the result back into mem_dc.
 911     StretchBlt(hdc, r.x(), r.y(), r.width(), r.height(),
 912                mem_dc.Get(), r.width()-1, 0, -r.width(), r.height(), SRCCOPY);
 913     return result;
 914   }
 915
 916   // For some reason, Windows uses the name DFCS_MENUARROWRIGHT to indicate a
 917   // left pointing arrow. This makes the following statement counterintuitive.
 918   UINT pfc_state = extra.pointing_right ? DFCS_MENUARROW : DFCS_MENUARROWRIGHT;
 919   return PaintFrameControl(hdc, rect, DFC_MENU, pfc_state, extra.is_selected,
 920                            state);
 921 }
 922
 923 HRESULT NativeThemeWin::PaintMenuBackground(HDC hdc,
 924                                             const gfx::Rect& rect) const {
 925   HANDLE handle = GetThemeHandle(MENU);
 926   RECT rect_win = rect.ToRECT();
 927   if (handle && draw_theme_) {
 928     HRESULT result = draw_theme_(handle, hdc, MENU_POPUPBACKGROUND, 0,
 929                                  &rect_win, NULL);
 930     FrameRect(hdc, &rect_win, GetSysColorBrush(COLOR_3DSHADOW));
 931     return result;
 932   }
 933
 934   FillRect(hdc, &rect_win, GetSysColorBrush(COLOR_MENU));
 935   DrawEdge(hdc, &rect_win, EDGE_RAISED, BF_RECT);
 936   return S_OK;
 937 }
 938
 939 HRESULT NativeThemeWin::PaintMenuCheck(
 940     HDC hdc,
 941     State state,
 942     const gfx::Rect& rect,
 943     const MenuCheckExtraParams& extra) const {
 944   HANDLE handle = GetThemeHandle(MENU);
 945   if (handle && draw_theme_) {
 946     const int state_id = extra.is_radio ?
 947         ((state == kDisabled) ? MC_BULLETDISABLED : MC_BULLETNORMAL) :
 948         ((state == kDisabled) ? MC_CHECKMARKDISABLED : MC_CHECKMARKNORMAL);
 949     RECT rect_win = rect.ToRECT();
 950     return draw_theme_(handle, hdc, MENU_POPUPCHECK, state_id, &rect_win, NULL);
 951   }
 952
 953   return PaintFrameControl(hdc, rect, DFC_MENU,
 954                            extra.is_radio ? DFCS_MENUBULLET : DFCS_MENUCHECK,
 955                            extra.is_selected, state);
 956 }
 957
 958 HRESULT NativeThemeWin::PaintMenuCheckBackground(HDC hdc,
 959                                                  State state,
 960                                                  const gfx::Rect& rect) const {
 961   HANDLE handle = GetThemeHandle(MENU);
 962   if (!handle || !draw_theme_)
 963     return S_OK;  // Nothing to do for background.
 964
 965   int state_id = state == kDisabled ? MCB_DISABLED : MCB_NORMAL;
 966   RECT rect_win = rect.ToRECT();
 967   return draw_theme_(handle, hdc, MENU_POPUPCHECKBACKGROUND, state_id,
 968                      &rect_win, NULL);
 969 }
 970
 971 HRESULT NativeThemeWin::PaintMenuItemBackground(
 972     HDC hdc,
 973     State state,
 974     const gfx::Rect& rect,
 975     const MenuItemExtraParams& extra) const {
 976   HANDLE handle = GetThemeHandle(MENU);
 977   RECT rect_win = rect.ToRECT();
 978   int state_id = MPI_NORMAL;
 979   switch (state) {
 980     case kDisabled:
 981       state_id = extra.is_selected ? MPI_DISABLEDHOT : MPI_DISABLED;
 982       break;
 983     case kHovered:
 984       state_id = MPI_HOT;
 985       break;
 986     case kNormal:
 987       break;
 988     case kPressed:
 989     case kNumStates:
 990       NOTREACHED();
 991       break;
 992   }
 993
 994   if (handle && draw_theme_)
 995     return draw_theme_(handle, hdc, MENU_POPUPITEM, state_id, &rect_win, NULL);
 996
 997   if (extra.is_selected)
 998     FillRect(hdc, &rect_win, GetSysColorBrush(COLOR_HIGHLIGHT));
 999   return S_OK;
1000 }
1001
1002 HRESULT NativeThemeWin::PaintPushButton(HDC hdc,
1003                                         Part part,
1004                                         State state,
1005                                         const gfx::Rect& rect,
1006                                         const ButtonExtraParams& extra) const {
1007   int state_id = extra.is_default ? PBS_DEFAULTED : PBS_NORMAL;
1008   switch (state) {
1009     case kDisabled:
1010       state_id = PBS_DISABLED;
1011       break;
1012     case kHovered:
1013       state_id = PBS_HOT;
1014       break;
1015     case kNormal:
1016       break;
1017     case kPressed:
1018       state_id = PBS_PRESSED;
1019       break;
1020     case kNumStates:
1021       NOTREACHED();
1022       break;
1023   }
1024
1025   RECT rect_win = rect.ToRECT();
1026   return PaintButton(hdc, state, extra, BP_PUSHBUTTON, state_id, &rect_win);
1027 }
1028
1029 HRESULT NativeThemeWin::PaintRadioButton(HDC hdc,
1030                                          Part part,
1031                                          State state,
1032                                          const gfx::Rect& rect,
1033                                          const ButtonExtraParams& extra) const {
1034   int state_id = extra.checked ? RBS_CHECKEDNORMAL : RBS_UNCHECKEDNORMAL;
1035   switch (state) {
1036     case kDisabled:
1037       state_id = extra.checked ? RBS_CHECKEDDISABLED : RBS_UNCHECKEDDISABLED;
1038       break;
1039     case kHovered:
1040       state_id = extra.checked ? RBS_CHECKEDHOT : RBS_UNCHECKEDHOT;
1041       break;
1042     case kNormal:
1043       break;
1044     case kPressed:
1045       state_id = extra.checked ? RBS_CHECKEDPRESSED : RBS_UNCHECKEDPRESSED;
1046       break;
1047     case kNumStates:
1048       NOTREACHED();
1049       break;
1050   }
1051
1052   RECT rect_win = rect.ToRECT();
1053   return PaintButton(hdc, state, extra, BP_RADIOBUTTON, state_id, &rect_win);
1054 }
1055
1056 HRESULT NativeThemeWin::PaintCheckbox(HDC hdc,
1057                                       Part part,
1058                                       State state,
1059                                       const gfx::Rect& rect,
1060                                       const ButtonExtraParams& extra) const {
1061   int state_id = extra.checked ?
1062       CBS_CHECKEDNORMAL :
1063       (extra.indeterminate ? CBS_MIXEDNORMAL : CBS_UNCHECKEDNORMAL);
1064   switch (state) {
1065     case kDisabled:
1066       state_id = extra.checked ?
1067           CBS_CHECKEDDISABLED :
1068           (extra.indeterminate ? CBS_MIXEDDISABLED : CBS_UNCHECKEDDISABLED);
1069       break;
1070     case kHovered:
1071       state_id = extra.checked ?
1072           CBS_CHECKEDHOT :
1073           (extra.indeterminate ? CBS_MIXEDHOT : CBS_UNCHECKEDHOT);
1074       break;
1075     case kNormal:
1076       break;
1077     case kPressed:
1078       state_id = extra.checked ?
1079           CBS_CHECKEDPRESSED :
1080           (extra.indeterminate ? CBS_MIXEDPRESSED : CBS_UNCHECKEDPRESSED);
1081       break;
1082     case kNumStates:
1083       NOTREACHED();
1084       break;
1085   }
1086
1087   RECT rect_win = rect.ToRECT();
1088   return PaintButton(hdc, state, extra, BP_CHECKBOX, state_id, &rect_win);
1089 }
1090
1091 HRESULT NativeThemeWin::PaintMenuList(HDC hdc,
1092                                       State state,
1093                                       const gfx::Rect& rect,
1094                                       const MenuListExtraParams& extra) const {
1095   HANDLE handle = GetThemeHandle(MENULIST);
1096   RECT rect_win = rect.ToRECT();
1097   int state_id = CBXS_NORMAL;
1098   switch (state) {
1099     case kDisabled:
1100       state_id = CBXS_DISABLED;
1101       break;
1102     case kHovered:
1103       state_id = CBXS_HOT;
1104       break;
1105     case kNormal:
1106       break;
1107     case kPressed:
1108       state_id = CBXS_PRESSED;
1109       break;
1110     case kNumStates:
1111       NOTREACHED();
1112       break;
1113   }
1114
1115   if (handle && draw_theme_)
1116     return draw_theme_(handle, hdc, CP_DROPDOWNBUTTON, state_id, &rect_win,
1117                        NULL);
1118
1119   // Draw it manually.
1120   DrawFrameControl(hdc, &rect_win, DFC_SCROLL,
1121                    DFCS_SCROLLCOMBOBOX | extra.classic_state);
1122   return S_OK;
1123 }
1124
1125 HRESULT NativeThemeWin::PaintScrollbarArrow(
1126     HDC hdc,
1127     Part part,
1128     State state,
1129     const gfx::Rect& rect,
1130     const ScrollbarArrowExtraParams& extra) const {
1131   static const int state_id_matrix[4][kNumStates] = {
1132       ABS_DOWNDISABLED, ABS_DOWNHOT, ABS_DOWNNORMAL, ABS_DOWNPRESSED,
1133       ABS_LEFTDISABLED, ABS_LEFTHOT, ABS_LEFTNORMAL, ABS_LEFTPRESSED,
1134       ABS_RIGHTDISABLED, ABS_RIGHTHOT, ABS_RIGHTNORMAL, ABS_RIGHTPRESSED,
1135       ABS_UPDISABLED, ABS_UPHOT, ABS_UPNORMAL, ABS_UPPRESSED
1136   };
1137   HANDLE handle = GetThemeHandle(SCROLLBAR);
1138   RECT rect_win = rect.ToRECT();
1139   if (handle && draw_theme_) {
1140     int index = part - kScrollbarDownArrow;
1141     DCHECK_GE(index, 0);
1142     DCHECK_LT(static_cast<size_t>(index), arraysize(state_id_matrix));
1143     int state_id = state_id_matrix[index][state];
1144
1145     // Hovering means that the cursor is over the scroolbar, but not over the
1146     // specific arrow itself.  We don't want to show it "hot" mode, but only
1147     // in "hover" mode.
1148     if (state == kHovered && extra.is_hovering) {
1149       switch (part) {
1150         case kScrollbarDownArrow:
1151           state_id = ABS_DOWNHOVER;
1152           break;
1153         case kScrollbarLeftArrow:
1154           state_id = ABS_LEFTHOVER;
1155           break;
1156         case kScrollbarRightArrow:
1157           state_id = ABS_RIGHTHOVER;
1158           break;
1159         case kScrollbarUpArrow:
1160           state_id = ABS_UPHOVER;
1161           break;
1162         default:
1163           NOTREACHED();
1164           break;
1165       }
1166     }
1167     return PaintScaledTheme(handle, hdc, SBP_ARROWBTN, state_id, rect);
1168   }
1169
1170   int classic_state = DFCS_SCROLLDOWN;
1171   switch (part) {
1172     case kScrollbarDownArrow:
1173       break;
1174     case kScrollbarLeftArrow:
1175       classic_state = DFCS_SCROLLLEFT;
1176       break;
1177     case kScrollbarRightArrow:
1178       classic_state = DFCS_SCROLLRIGHT;
1179       break;
1180     case kScrollbarUpArrow:
1181       classic_state = DFCS_SCROLLUP;
1182       break;
1183     default:
1184       NOTREACHED();
1185       break;
1186   }
1187   switch (state) {
1188     case kDisabled:
1189       classic_state |= DFCS_INACTIVE;
1190       break;
1191     case kHovered:
1192       classic_state |= DFCS_HOT;
1193       break;
1194     case kNormal:
1195       break;
1196     case kPressed:
1197       classic_state |= DFCS_PUSHED;
1198       break;
1199     case kNumStates:
1200       NOTREACHED();
1201       break;
1202   }
1203   DrawFrameControl(hdc, &rect_win, DFC_SCROLL, classic_state);
1204   return S_OK;
1205 }
1206
1207 HRESULT NativeThemeWin::PaintScrollbarThumb(
1208     HDC hdc,
1209     Part part,
1210     State state,
1211     const gfx::Rect& rect,
1212     const ScrollbarThumbExtraParams& extra) const {
1213   HANDLE handle = GetThemeHandle(SCROLLBAR);
1214   RECT rect_win = rect.ToRECT();
1215
1216   int part_id = SBP_THUMBBTNVERT;
1217   switch (part) {
1218     case kScrollbarHorizontalThumb:
1219       part_id = SBP_THUMBBTNHORZ;
1220       break;
1221     case kScrollbarVerticalThumb:
1222       break;
1223     case kScrollbarHorizontalGripper:
1224       part_id = SBP_GRIPPERHORZ;
1225       break;
1226     case kScrollbarVerticalGripper:
1227       part_id = SBP_GRIPPERVERT;
1228       break;
1229     default:
1230       NOTREACHED();
1231       break;
1232   }
1233
1234   int state_id = SCRBS_NORMAL;
1235   switch (state) {
1236     case kDisabled:
1237       state_id = SCRBS_DISABLED;
1238       break;
1239     case kHovered:
1240       state_id = extra.is_hovering ? SCRBS_HOVER : SCRBS_HOT;
1241       break;
1242     case kNormal:
1243       break;
1244     case kPressed:
1245       state_id = SCRBS_PRESSED;
1246       break;
1247     case kNumStates:
1248       NOTREACHED();
1249       break;
1250   }
1251
1252   if (handle && draw_theme_)
1253     return PaintScaledTheme(handle, hdc, part_id, state_id, rect);
1254
1255   // Draw it manually.
1256   if ((part_id == SBP_THUMBBTNHORZ) || (part_id == SBP_THUMBBTNVERT))
1257     DrawEdge(hdc, &rect_win, EDGE_RAISED, BF_RECT | BF_MIDDLE);
1258   // Classic mode doesn't have a gripper.
1259   return S_OK;
1260 }
1261
1262 HRESULT NativeThemeWin::PaintScrollbarTrack(
1263     SkCanvas* canvas,
1264     HDC hdc,
1265     Part part,
1266     State state,
1267     const gfx::Rect& rect,
1268     const ScrollbarTrackExtraParams& extra) const {
1269   HANDLE handle = GetThemeHandle(SCROLLBAR);
1270   RECT rect_win = rect.ToRECT();
1271
1272   const int part_id = extra.is_upper ?
1273       ((part == kScrollbarHorizontalTrack) ?
1274           SBP_UPPERTRACKHORZ : SBP_UPPERTRACKVERT) :
1275       ((part == kScrollbarHorizontalTrack) ?
1276           SBP_LOWERTRACKHORZ : SBP_LOWERTRACKVERT);
1277
1278   int state_id = SCRBS_NORMAL;
1279   switch (state) {
1280     case kDisabled:
1281       state_id = SCRBS_DISABLED;
1282       break;
1283     case kHovered:
1284       state_id = SCRBS_HOVER;
1285       break;
1286     case kNormal:
1287       break;
1288     case kPressed:
1289       state_id = SCRBS_PRESSED;
1290       break;
1291     case kNumStates:
1292       NOTREACHED();
1293       break;
1294   }
1295
1296   if (handle && draw_theme_)
1297     return draw_theme_(handle, hdc, part_id, state_id, &rect_win, NULL);
1298
1299   // Draw it manually.
1300   if ((system_colors_[COLOR_SCROLLBAR] != system_colors_[COLOR_3DFACE]) &&
1301       (system_colors_[COLOR_SCROLLBAR] != system_colors_[COLOR_WINDOW])) {
1302     FillRect(hdc, &rect_win, reinterpret_cast<HBRUSH>(COLOR_SCROLLBAR + 1));
1303   } else {
1304     SkPaint paint;
1305     RECT align_rect = gfx::Rect(extra.track_x, extra.track_y, extra.track_width,
1306                                 extra.track_height).ToRECT();
1307     SetCheckerboardShader(&paint, align_rect);
1308     canvas->drawIRect(skia::RECTToSkIRect(rect_win), paint);
1309   }
1310   if (extra.classic_state & DFCS_PUSHED)
1311     InvertRect(hdc, &rect_win);
1312   return S_OK;
1313 }
1314
1315 HRESULT NativeThemeWin::PaintSpinButton(
1316     HDC hdc,
1317     Part part,
1318     State state,
1319     const gfx::Rect& rect,
1320     const InnerSpinButtonExtraParams& extra) const {
1321   HANDLE handle = GetThemeHandle(SPIN);
1322   RECT rect_win = rect.ToRECT();
1323   int part_id = extra.spin_up ? SPNP_UP : SPNP_DOWN;
1324   int state_id = extra.spin_up ? UPS_NORMAL : DNS_NORMAL;
1325   switch (state) {
1326     case kDisabled:
1327       state_id = extra.spin_up ? UPS_DISABLED : DNS_DISABLED;
1328       break;
1329     case kHovered:
1330       state_id = extra.spin_up ? UPS_HOT : DNS_HOT;
1331       break;
1332     case kNormal:
1333       break;
1334     case kPressed:
1335       state_id = extra.spin_up ? UPS_PRESSED : DNS_PRESSED;
1336       break;
1337     case kNumStates:
1338       NOTREACHED();
1339       break;
1340   }
1341
1342   if (handle && draw_theme_)
1343     return draw_theme_(handle, hdc, part_id, state_id, &rect_win, NULL);
1344   DrawFrameControl(hdc, &rect_win, DFC_SCROLL, extra.classic_state);
1345   return S_OK;
1346 }
1347
1348 HRESULT NativeThemeWin::PaintTrackbar(
1349     SkCanvas* canvas,
1350     HDC hdc,
1351     Part part,
1352     State state,
1353     const gfx::Rect& rect,
1354     const TrackbarExtraParams& extra) const {
1355   const int part_id = extra.vertical ?
1356       ((part == kTrackbarTrack) ? TKP_TRACKVERT : TKP_THUMBVERT) :
1357       ((part == kTrackbarTrack) ? TKP_TRACK : TKP_THUMBBOTTOM);
1358
1359   int state_id = TUS_NORMAL;
1360   switch (state) {
1361     case kDisabled:
1362       state_id = TUS_DISABLED;
1363       break;
1364     case kHovered:
1365       state_id = TUS_HOT;
1366       break;
1367     case kNormal:
1368       break;
1369     case kPressed:
1370       state_id = TUS_PRESSED;
1371       break;
1372     case kNumStates:
1373       NOTREACHED();
1374       break;
1375   }
1376
1377   // Make the channel be 4 px thick in the center of the supplied rect.  (4 px
1378   // matches what XP does in various menus; GetThemePartSize() doesn't seem to
1379   // return good values here.)
1380   RECT rect_win = rect.ToRECT();
1381   RECT channel_rect = rect.ToRECT();
1382   const int channel_thickness = 4;
1383   if (part_id == TKP_TRACK) {
1384     channel_rect.top +=
1385         ((channel_rect.bottom - channel_rect.top - channel_thickness) / 2);
1386     channel_rect.bottom = channel_rect.top + channel_thickness;
1387   } else if (part_id == TKP_TRACKVERT) {
1388     channel_rect.left +=
1389         ((channel_rect.right - channel_rect.left - channel_thickness) / 2);
1390     channel_rect.right = channel_rect.left + channel_thickness;
1391   }  // else this isn't actually a channel, so |channel_rect| == |rect|.
1392
1393   HANDLE handle = GetThemeHandle(TRACKBAR);
1394   if (handle && draw_theme_)
1395     return draw_theme_(handle, hdc, part_id, state_id, &channel_rect, NULL);
1396
1397   // Classic mode, draw it manually.
1398   if ((part_id == TKP_TRACK) || (part_id == TKP_TRACKVERT)) {
1399     DrawEdge(hdc, &channel_rect, EDGE_SUNKEN, BF_RECT);
1400   } else if (part_id == TKP_THUMBVERT) {
1401     DrawEdge(hdc, &rect_win, EDGE_RAISED, BF_RECT | BF_SOFT | BF_MIDDLE);
1402   } else {
1403     // Split rect into top and bottom pieces.
1404     RECT top_section = rect.ToRECT();
1405     RECT bottom_section = rect.ToRECT();
1406     top_section.bottom -= ((bottom_section.right - bottom_section.left) / 2);
1407     bottom_section.top = top_section.bottom;
1408     DrawEdge(hdc, &top_section, EDGE_RAISED,
1409              BF_LEFT | BF_TOP | BF_RIGHT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
1410
1411     // Split triangular piece into two diagonals.
1412     RECT& left_half = bottom_section;
1413     RECT right_half = bottom_section;
1414     right_half.left += ((bottom_section.right - bottom_section.left) / 2);
1415     left_half.right = right_half.left;
1416     DrawEdge(hdc, &left_half, EDGE_RAISED,
1417              BF_DIAGONAL_ENDTOPLEFT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
1418     DrawEdge(hdc, &right_half, EDGE_RAISED,
1419              BF_DIAGONAL_ENDBOTTOMLEFT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
1420
1421     // If the button is pressed, draw hatching.
1422     if (extra.classic_state & DFCS_PUSHED) {
1423       SkPaint paint;
1424       SetCheckerboardShader(&paint, rect_win);
1425
1426       // Fill all three pieces with the pattern.
1427       canvas->drawIRect(skia::RECTToSkIRect(top_section), paint);
1428
1429       SkScalar left_triangle_top = SkIntToScalar(left_half.top);
1430       SkScalar left_triangle_right = SkIntToScalar(left_half.right);
1431       SkPath left_triangle;
1432       left_triangle.moveTo(SkIntToScalar(left_half.left), left_triangle_top);
1433       left_triangle.lineTo(left_triangle_right, left_triangle_top);
1434       left_triangle.lineTo(left_triangle_right,
1435                            SkIntToScalar(left_half.bottom));
1436       left_triangle.close();
1437       canvas->drawPath(left_triangle, paint);
1438
1439       SkScalar right_triangle_left = SkIntToScalar(right_half.left);
1440       SkScalar right_triangle_top = SkIntToScalar(right_half.top);
1441       SkPath right_triangle;
1442       right_triangle.moveTo(right_triangle_left, right_triangle_top);
1443       right_triangle.lineTo(SkIntToScalar(right_half.right),
1444                             right_triangle_top);
1445       right_triangle.lineTo(right_triangle_left,
1446                             SkIntToScalar(right_half.bottom));
1447       right_triangle.close();
1448       canvas->drawPath(right_triangle, paint);
1449     }
1450   }
1451   return S_OK;
1452 }
1453
1454 HRESULT NativeThemeWin::PaintProgressBar(
1455     HDC hdc,
1456     const gfx::Rect& rect,
1457     const ProgressBarExtraParams& extra) const {
1458   // There is no documentation about the animation speed, frame-rate, nor
1459   // size of moving overlay of the indeterminate progress bar.
1460   // So we just observed real-world programs and guessed following parameters.
1461   const int kDeterminateOverlayPixelsPerSecond = 300;
1462   const int kDeterminateOverlayWidth = 120;
1463   const int kIndeterminateOverlayPixelsPerSecond =  175;
1464   const int kVistaIndeterminateOverlayWidth = 120;
1465   const int kXPIndeterminateOverlayWidth = 55;
1466   // The thickness of the bar frame inside |value_rect|
1467   const int kXPBarPadding = 3;
1468
1469   RECT bar_rect = rect.ToRECT();
1470   RECT value_rect = gfx::Rect(extra.value_rect_x,
1471                               extra.value_rect_y,
1472                               extra.value_rect_width,
1473                               extra.value_rect_height).ToRECT();
1474
1475   HANDLE handle = GetThemeHandle(PROGRESS);
1476   if (!handle || !draw_theme_ || !draw_theme_ex_) {
1477     FillRect(hdc, &bar_rect, GetSysColorBrush(COLOR_BTNFACE));
1478     FillRect(hdc, &value_rect, GetSysColorBrush(COLOR_BTNSHADOW));
1479     DrawEdge(hdc, &bar_rect, EDGE_SUNKEN, BF_RECT | BF_ADJUST);
1480     return S_OK;
1481   }
1482
1483   draw_theme_(handle, hdc, PP_BAR, 0, &bar_rect, NULL);
1484
1485   bool pre_vista = base::win::GetVersion() < base::win::VERSION_VISTA;
1486   int bar_width = bar_rect.right - bar_rect.left;
1487   if (!extra.determinate) {
1488     // The glossy overlay for the indeterminate progress bar has a small pause
1489     // after each animation. We emulate this by adding an invisible margin the
1490     // animation has to traverse.
1491     int width_with_margin = bar_width + kIndeterminateOverlayPixelsPerSecond;
1492     int overlay_width = pre_vista ?
1493         kXPIndeterminateOverlayWidth : kVistaIndeterminateOverlayWidth;
1494     RECT overlay_rect = bar_rect;
1495     overlay_rect.left += ComputeAnimationProgress(
1496         width_with_margin, overlay_width, kIndeterminateOverlayPixelsPerSecond,
1497         extra.animated_seconds);
1498     overlay_rect.right = overlay_rect.left + overlay_width;
1499     if (pre_vista) {
1500       RECT shrunk_rect = InsetRect(&overlay_rect, kXPBarPadding);
1501       RECT shrunk_bar_rect = InsetRect(&bar_rect, kXPBarPadding);
1502       draw_theme_(handle, hdc, PP_CHUNK, 0, &shrunk_rect, &shrunk_bar_rect);
1503     } else {
1504       draw_theme_(handle, hdc, PP_MOVEOVERLAY, 0, &overlay_rect, &bar_rect);
1505     }
1506     return S_OK;
1507   }
1508
1509   // We care about the direction here because PP_CHUNK painting is asymmetric.
1510   // TODO(morrita): This RTL guess can be wrong.  We should pass in the
1511   // direction from WebKit.
1512   const DTBGOPTS value_draw_options = {
1513     sizeof(DTBGOPTS),
1514     (bar_rect.right == value_rect.right && bar_rect.left != value_rect.left) ?
1515         DTBG_MIRRORDC : 0u,
1516     bar_rect
1517   };
1518   if (pre_vista) {
1519     // On XP, the progress bar is chunk-style and has no glossy effect.  We need
1520     // to shrink the destination rect to fit the part inside the bar with an
1521     // appropriate margin.
1522     RECT shrunk_value_rect = InsetRect(&value_rect, kXPBarPadding);
1523     draw_theme_ex_(handle, hdc, PP_CHUNK, 0, &shrunk_value_rect,
1524                    &value_draw_options);
1525   } else  {
1526     // On Vista or later, the progress bar part has a single-block value part
1527     // and a glossy effect.  The value part has exactly same height as the bar
1528     // part, so we don't need to shrink the rect.
1529     draw_theme_ex_(handle, hdc, PP_FILL, 0, &value_rect, &value_draw_options);
1530
1531     RECT overlay_rect = value_rect;
1532     overlay_rect.left += ComputeAnimationProgress(
1533         bar_width, kDeterminateOverlayWidth, kDeterminateOverlayPixelsPerSecond,
1534         extra.animated_seconds);
1535     overlay_rect.right = overlay_rect.left + kDeterminateOverlayWidth;
1536     draw_theme_(handle, hdc, PP_MOVEOVERLAY, 0, &overlay_rect, &value_rect);
1537   }
1538   return S_OK;
1539 }
1540
1541 HRESULT NativeThemeWin::PaintWindowResizeGripper(HDC hdc,
1542                                                  const gfx::Rect& rect) const {
1543   HANDLE handle = GetThemeHandle(STATUS);
1544   RECT rect_win = rect.ToRECT();
1545   if (handle && draw_theme_) {
1546     // Paint the status bar gripper.  There doesn't seem to be a standard
1547     // gripper in Windows for the space between scrollbars.  This is pretty
1548     // close, but it's supposed to be painted over a status bar.
1549     return draw_theme_(handle, hdc, SP_GRIPPER, 0, &rect_win, NULL);
1550   }
1551
1552   // Draw a windows classic scrollbar gripper.
1553   DrawFrameControl(hdc, &rect_win, DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
1554   return S_OK;
1555 }
1556
1557 HRESULT NativeThemeWin::PaintTabPanelBackground(HDC hdc,
1558                                                 const gfx::Rect& rect) const {
1559   HANDLE handle = GetThemeHandle(TAB);
1560   RECT rect_win = rect.ToRECT();
1561   if (handle && draw_theme_)
1562     return draw_theme_(handle, hdc, TABP_BODY, 0, &rect_win, NULL);
1563
1564   // Classic just renders a flat color background.
1565   FillRect(hdc, &rect_win, reinterpret_cast<HBRUSH>(COLOR_3DFACE + 1));
1566   return S_OK;
1567 }
1568
1569 HRESULT NativeThemeWin::PaintTextField(
1570     HDC hdc,
1571     Part part,
1572     State state,
1573     const gfx::Rect& rect,
1574     const TextFieldExtraParams& extra) const {
1575   int state_id = ETS_NORMAL;
1576   switch (state) {
1577     case kDisabled:
1578       state_id = ETS_DISABLED;
1579       break;
1580     case kHovered:
1581       state_id = ETS_HOT;
1582       break;
1583     case kNormal:
1584       if (extra.is_read_only)
1585         state_id = ETS_READONLY;
1586       else if (extra.is_focused)
1587         state_id = ETS_FOCUSED;
1588       break;
1589     case kPressed:
1590       state_id = ETS_SELECTED;
1591       break;
1592     case kNumStates:
1593       NOTREACHED();
1594       break;
1595   }
1596
1597   RECT rect_win = rect.ToRECT();
1598   return PaintTextField(hdc, EP_EDITTEXT, state_id, extra.classic_state,
1599                         &rect_win,
1600                         skia::SkColorToCOLORREF(extra.background_color),
1601                         extra.fill_content_area, extra.draw_edges);
1602 }
1603
1604 HRESULT NativeThemeWin::PaintTextField(HDC hdc,
1605                                        int part_id,
1606                                        int state_id,
1607                                        int classic_state,
1608                                        RECT* rect,
1609                                        COLORREF color,
1610                                        bool fill_content_area,
1611                                        bool draw_edges) const {
1612   // TODO(ojan): http://b/1210017 Figure out how to give the ability to
1613   // exclude individual edges from being drawn.
1614
1615   HANDLE handle = GetThemeHandle(TEXTFIELD);
1616   // TODO(mpcomplete): can we detect if the color is specified by the user,
1617   // and if not, just use the system color?
1618   // CreateSolidBrush() accepts a RGB value but alpha must be 0.
1619   base::win::ScopedGDIObject<HBRUSH> bg_brush(CreateSolidBrush(color));
1620   // DrawThemeBackgroundEx was introduced in XP SP2, so that it's possible
1621   // draw_theme_ex_ is NULL and draw_theme_ is non-null.
1622   if (!handle || (!draw_theme_ex_ && (!draw_theme_ || !draw_edges))) {
1623     // Draw it manually.
1624     if (draw_edges)
1625       DrawEdge(hdc, rect, EDGE_SUNKEN, BF_RECT | BF_ADJUST);
1626
1627     if (fill_content_area) {
1628       FillRect(hdc, rect, (classic_state & DFCS_INACTIVE) ?
1629                    reinterpret_cast<HBRUSH>(COLOR_BTNFACE + 1) : bg_brush);
1630     }
1631     return S_OK;
1632   }
1633
1634   static const DTBGOPTS omit_border_options = {
1635     sizeof(DTBGOPTS),
1636     DTBG_OMITBORDER,
1637     { 0, 0, 0, 0 }
1638   };
1639   HRESULT hr = draw_theme_ex_ ?
1640     draw_theme_ex_(handle, hdc, part_id, state_id, rect,
1641                    draw_edges ? NULL : &omit_border_options) :
1642     draw_theme_(handle, hdc, part_id, state_id, rect, NULL);
1643
1644   // TODO(maruel): Need to be fixed if get_theme_content_rect_ is NULL.
1645   if (fill_content_area && get_theme_content_rect_) {
1646     RECT content_rect;
1647     hr = get_theme_content_rect_(handle, hdc, part_id, state_id, rect,
1648                                   &content_rect);
1649     FillRect(hdc, &content_rect, bg_brush);
1650   }
1651   return hr;
1652 }
1653
1654 HRESULT NativeThemeWin::PaintScaledTheme(HANDLE theme,
1655                                          HDC hdc,
1656                                          int part_id,
1657                                          int state_id,
1658                                          const gfx::Rect& rect) const {
1659   // Correct the scaling and positioning of sub-components such as scrollbar
1660   // arrows and thumb grippers in the event that the world transform applies
1661   // scaling (e.g. in high-DPI mode).
1662   XFORM save_transform;
1663   if (GetWorldTransform(hdc, &save_transform)) {
1664     float scale = save_transform.eM11;
1665     if (scale != 1 && save_transform.eM12 == 0) {
1666       ModifyWorldTransform(hdc, NULL, MWT_IDENTITY);
1667       gfx::Rect scaled_rect(gfx::ToEnclosedRect(gfx::ScaleRect(rect, scale)));
1668       scaled_rect.Offset(save_transform.eDx, save_transform.eDy);
1669       RECT bounds = scaled_rect.ToRECT();
1670       HRESULT result = draw_theme_(theme, hdc, part_id, state_id, &bounds,
1671                                    NULL);
1672       SetWorldTransform(hdc, &save_transform);
1673       return result;
1674     }
1675   }
1676   RECT bounds = rect.ToRECT();
1677   return draw_theme_(theme, hdc, part_id, state_id, &bounds, NULL);
1678 }
1679
1680 // static
1681 NativeThemeWin::ThemeName NativeThemeWin::GetThemeName(Part part) {
1682   switch (part) {
1683     case kCheckbox:
1684     case kPushButton:
1685     case kRadio:
1686       return BUTTON;
1687     case kInnerSpinButton:
1688       return SPIN;
1689     case kMenuList:
1690     case kMenuCheck:
1691     case kMenuPopupArrow:
1692     case kMenuPopupGutter:
1693     case kMenuPopupSeparator:
1694       return MENU;
1695     case kProgressBar:
1696       return PROGRESS;
1697     case kScrollbarDownArrow:
1698     case kScrollbarLeftArrow:
1699     case kScrollbarRightArrow:
1700     case kScrollbarUpArrow:
1701     case kScrollbarHorizontalThumb:
1702     case kScrollbarVerticalThumb:
1703     case kScrollbarHorizontalTrack:
1704     case kScrollbarVerticalTrack:
1705       return SCROLLBAR;
1706     case kSliderTrack:
1707     case kSliderThumb:
1708       return TRACKBAR;
1709     case kTextField:
1710       return TEXTFIELD;
1711     case kWindowResizeGripper:
1712       return STATUS;
1713     case kComboboxArrow:
1714     case kMenuCheckBackground:
1715     case kMenuPopupBackground:
1716     case kMenuItemBackground:
1717     case kScrollbarHorizontalGripper:
1718     case kScrollbarVerticalGripper:
1719     case kScrollbarCorner:
1720     case kTabPanelBackground:
1721     case kTrackbarThumb:
1722     case kTrackbarTrack:
1723     case kMaxPart:
1724       NOTREACHED();
1725   }
1726   return LAST;
1727 }
1728
1729 // static
1730 int NativeThemeWin::GetWindowsPart(Part part,
1731                                    State state,
1732                                    const ExtraParams& extra) {
1733   switch (part) {
1734     case kCheckbox:
1735       return BP_CHECKBOX;
1736     case kMenuCheck:
1737       return MENU_POPUPCHECK;
1738     case kMenuPopupArrow:
1739       return MENU_POPUPSUBMENU;
1740     case kMenuPopupGutter:
1741       return MENU_POPUPGUTTER;
1742     case kMenuPopupSeparator:
1743       return MENU_POPUPSEPARATOR;
1744     case kPushButton:
1745       return BP_PUSHBUTTON;
1746     case kRadio:
1747       return BP_RADIOBUTTON;
1748     case kScrollbarDownArrow:
1749     case kScrollbarLeftArrow:
1750     case kScrollbarRightArrow:
1751     case kScrollbarUpArrow:
1752       return SBP_ARROWBTN;
1753     case kScrollbarHorizontalThumb:
1754       return SBP_THUMBBTNHORZ;
1755     case kScrollbarVerticalThumb:
1756       return SBP_THUMBBTNVERT;
1757     case kWindowResizeGripper:
1758       return SP_GRIPPER;
1759     case kComboboxArrow:
1760     case kInnerSpinButton:
1761     case kMenuList:
1762     case kMenuCheckBackground:
1763     case kMenuPopupBackground:
1764     case kMenuItemBackground:
1765     case kProgressBar:
1766     case kScrollbarHorizontalTrack:
1767     case kScrollbarVerticalTrack:
1768     case kScrollbarHorizontalGripper:
1769     case kScrollbarVerticalGripper:
1770     case kScrollbarCorner:
1771     case kSliderTrack:
1772     case kSliderThumb:
1773     case kTabPanelBackground:
1774     case kTextField:
1775     case kTrackbarThumb:
1776     case kTrackbarTrack:
1777     case kMaxPart:
1778       NOTREACHED();
1779   }
1780   return 0;
1781 }
1782
1783 int NativeThemeWin::GetWindowsState(Part part,
1784                                     State state,
1785                                     const ExtraParams& extra) {
1786   switch (part) {
1787     case kCheckbox:
1788       switch (state) {
1789         case kDisabled:
1790           return CBS_UNCHECKEDDISABLED;
1791         case kHovered:
1792           return CBS_UNCHECKEDHOT;
1793         case kNormal:
1794           return CBS_UNCHECKEDNORMAL;
1795         case kPressed:
1796           return CBS_UNCHECKEDPRESSED;
1797         case kNumStates:
1798           NOTREACHED();
1799           return 0;
1800       }
1801     case kMenuCheck:
1802       switch (state) {
1803         case kDisabled:
1804           return extra.menu_check.is_radio ?
1805               MC_BULLETDISABLED : MC_CHECKMARKDISABLED;
1806         case kHovered:
1807         case kNormal:
1808         case kPressed:
1809           return extra.menu_check.is_radio ?
1810               MC_BULLETNORMAL : MC_CHECKMARKNORMAL;
1811         case kNumStates:
1812           NOTREACHED();
1813           return 0;
1814       }
1815     case kMenuPopupArrow:
1816     case kMenuPopupGutter:
1817     case kMenuPopupSeparator:
1818       switch (state) {
1819         case kDisabled:
1820           return MBI_DISABLED;
1821         case kHovered:
1822           return MBI_HOT;
1823         case kNormal:
1824           return MBI_NORMAL;
1825         case kPressed:
1826           return MBI_PUSHED;
1827         case kNumStates:
1828           NOTREACHED();
1829           return 0;
1830       }
1831     case kPushButton:
1832       switch (state) {
1833         case kDisabled:
1834           return PBS_DISABLED;
1835         case kHovered:
1836           return PBS_HOT;
1837         case kNormal:
1838           return PBS_NORMAL;
1839         case kPressed:
1840           return PBS_PRESSED;
1841         case kNumStates:
1842           NOTREACHED();
1843           return 0;
1844       }
1845     case kRadio:
1846       switch (state) {
1847         case kDisabled:
1848           return RBS_UNCHECKEDDISABLED;
1849         case kHovered:
1850           return RBS_UNCHECKEDHOT;
1851         case kNormal:
1852           return RBS_UNCHECKEDNORMAL;
1853         case kPressed:
1854           return RBS_UNCHECKEDPRESSED;
1855         case kNumStates:
1856           NOTREACHED();
1857           return 0;
1858       }
1859     case kScrollbarDownArrow:
1860       switch (state) {
1861         case kDisabled:
1862           return ABS_DOWNDISABLED;
1863         case kHovered:
1864           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1865           return base::win::GetVersion() < base::win::VERSION_VISTA ?
1866               ABS_DOWNHOT : ABS_DOWNHOVER;
1867         case kNormal:
1868           return ABS_DOWNNORMAL;
1869         case kPressed:
1870           return ABS_DOWNPRESSED;
1871         case kNumStates:
1872           NOTREACHED();
1873           return 0;
1874       }
1875     case kScrollbarLeftArrow:
1876       switch (state) {
1877         case kDisabled:
1878           return ABS_LEFTDISABLED;
1879         case kHovered:
1880           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1881           return base::win::GetVersion() < base::win::VERSION_VISTA ?
1882               ABS_LEFTHOT : ABS_LEFTHOVER;
1883         case kNormal:
1884           return ABS_LEFTNORMAL;
1885         case kPressed:
1886           return ABS_LEFTPRESSED;
1887         case kNumStates:
1888           NOTREACHED();
1889           return 0;
1890       }
1891     case kScrollbarRightArrow:
1892       switch (state) {
1893         case kDisabled:
1894           return ABS_RIGHTDISABLED;
1895         case kHovered:
1896           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1897           return base::win::GetVersion() < base::win::VERSION_VISTA ?
1898               ABS_RIGHTHOT : ABS_RIGHTHOVER;
1899         case kNormal:
1900           return ABS_RIGHTNORMAL;
1901         case kPressed:
1902           return ABS_RIGHTPRESSED;
1903         case kNumStates:
1904           NOTREACHED();
1905           return 0;
1906       }
1907       break;
1908     case kScrollbarUpArrow:
1909       switch (state) {
1910         case kDisabled:
1911           return ABS_UPDISABLED;
1912         case kHovered:
1913           // Mimic ScrollbarThemeChromiumWin.cpp in WebKit.
1914           return base::win::GetVersion() < base::win::VERSION_VISTA ?
1915               ABS_UPHOT : ABS_UPHOVER;
1916         case kNormal:
1917           return ABS_UPNORMAL;
1918         case kPressed:
1919           return ABS_UPPRESSED;
1920         case kNumStates:
1921           NOTREACHED();
1922           return 0;
1923       }
1924       break;
1925     case kScrollbarHorizontalThumb:
1926     case kScrollbarVerticalThumb:
1927       switch (state) {
1928         case kDisabled:
1929           return SCRBS_DISABLED;
1930         case kHovered:
1931           // Mimic WebKit's behaviour in ScrollbarThemeChromiumWin.cpp.
1932           return base::win::GetVersion() < base::win::VERSION_VISTA ?
1933               SCRBS_HOT : SCRBS_HOVER;
1934         case kNormal:
1935           return SCRBS_NORMAL;
1936         case kPressed:
1937           return SCRBS_PRESSED;
1938         case kNumStates:
1939           NOTREACHED();
1940           return 0;
1941       }
1942     case kWindowResizeGripper:
1943       switch (state) {
1944         case kDisabled:
1945         case kHovered:
1946         case kNormal:
1947         case kPressed:
1948           return 1;  // gripper has no windows state
1949         case kNumStates:
1950           NOTREACHED();
1951           return 0;
1952       }
1953     case kComboboxArrow:
1954     case kInnerSpinButton:
1955     case kMenuList:
1956     case kMenuCheckBackground:
1957     case kMenuPopupBackground:
1958     case kMenuItemBackground:
1959     case kProgressBar:
1960     case kScrollbarHorizontalTrack:
1961     case kScrollbarVerticalTrack:
1962     case kScrollbarHorizontalGripper:
1963     case kScrollbarVerticalGripper:
1964     case kScrollbarCorner:
1965     case kSliderTrack:
1966     case kSliderThumb:
1967     case kTabPanelBackground:
1968     case kTextField:
1969     case kTrackbarThumb:
1970     case kTrackbarTrack:
1971     case kMaxPart:
1972       NOTREACHED();
1973   }
1974   return 0;
1975 }
1976
1977 HRESULT NativeThemeWin::GetThemeInt(ThemeName theme,
1978                                     int part_id,
1979                                     int state_id,
1980                                     int prop_id,
1981                                     int *value) const {
1982   HANDLE handle = GetThemeHandle(theme);
1983   return (handle && get_theme_int_) ?
1984       get_theme_int_(handle, part_id, state_id, prop_id, value) : E_NOTIMPL;
1985 }
1986
1987 HRESULT NativeThemeWin::PaintFrameControl(HDC hdc,
1988                                           const gfx::Rect& rect,
1989                                           UINT type,
1990                                           UINT state,
1991                                           bool is_selected,
1992                                           State control_state) const {
1993   const int width = rect.width();
1994   const int height = rect.height();
1995
1996   // DrawFrameControl for menu arrow/check wants a monochrome bitmap.
1997   base::win::ScopedBitmap mask_bitmap(CreateBitmap(width, height, 1, 1, NULL));
1998
1999   if (mask_bitmap == NULL)
2000     return E_OUTOFMEMORY;
2001
2002   base::win::ScopedCreateDC bitmap_dc(CreateCompatibleDC(NULL));
2003   base::win::ScopedSelectObject select_bitmap(bitmap_dc.Get(), mask_bitmap);
2004   RECT local_rect = { 0, 0, width, height };
2005   DrawFrameControl(bitmap_dc.Get(), &local_rect, type, state);
2006
2007   // We're going to use BitBlt with a b&w mask. This results in using the dest
2008   // dc's text color for the black bits in the mask, and the dest dc's
2009   // background color for the white bits in the mask. DrawFrameControl draws the
2010   // check in black, and the background in white.
2011   int bg_color_key = COLOR_MENU;
2012   int text_color_key = COLOR_MENUTEXT;
2013   switch (control_state) {
2014     case kDisabled:
2015       bg_color_key = is_selected ? COLOR_HIGHLIGHT : COLOR_MENU;
2016       text_color_key = COLOR_GRAYTEXT;
2017       break;
2018     case kHovered:
2019       bg_color_key = COLOR_HIGHLIGHT;
2020       text_color_key = COLOR_HIGHLIGHTTEXT;
2021       break;
2022     case kNormal:
2023       break;
2024     case kPressed:
2025     case kNumStates:
2026       NOTREACHED();
2027       break;
2028   }
2029   COLORREF old_bg_color = SetBkColor(hdc, GetSysColor(bg_color_key));
2030   COLORREF old_text_color = SetTextColor(hdc, GetSysColor(text_color_key));
2031   BitBlt(hdc, rect.x(), rect.y(), width, height, bitmap_dc.Get(), 0, 0,
2032          SRCCOPY);
2033   SetBkColor(hdc, old_bg_color);
2034   SetTextColor(hdc, old_text_color);
2035
2036   return S_OK;
2037 }
2038
2039 HANDLE NativeThemeWin::GetThemeHandle(ThemeName theme_name) const {
2040   if (!open_theme_ || theme_name < 0 || theme_name >= LAST)
2041     return 0;
2042
2043   if (theme_handles_[theme_name])
2044     return theme_handles_[theme_name];
2045
2046   // Not found, try to load it.
2047   HANDLE handle = 0;
2048   switch (theme_name) {
2049   case BUTTON:
2050     handle = open_theme_(NULL, L"Button");
2051     break;
2052   case LIST:
2053     handle = open_theme_(NULL, L"Listview");
2054     break;
2055   case MENU:
2056     handle = open_theme_(NULL, L"Menu");
2057     break;
2058   case MENULIST:
2059     handle = open_theme_(NULL, L"Combobox");
2060     break;
2061   case SCROLLBAR:
2062     handle = open_theme_(NULL, L"Scrollbar");
2063     break;
2064   case STATUS:
2065     handle = open_theme_(NULL, L"Status");
2066     break;
2067   case TAB:
2068     handle = open_theme_(NULL, L"Tab");
2069     break;
2070   case TEXTFIELD:
2071     handle = open_theme_(NULL, L"Edit");
2072     break;
2073   case TRACKBAR:
2074     handle = open_theme_(NULL, L"Trackbar");
2075     break;
2076   case WINDOW:
2077     handle = open_theme_(NULL, L"Window");
2078     break;
2079   case PROGRESS:
2080     handle = open_theme_(NULL, L"Progress");
2081     break;
2082   case SPIN:
2083     handle = open_theme_(NULL, L"Spin");
2084     break;
2085   case LAST:
2086     NOTREACHED();
2087     break;
2088   }
2089   theme_handles_[theme_name] = handle;
2090   return handle;
2091 }
2092
2093 }  // namespace ui