src/ui/native_theme/native_theme_aura.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_aura.h"
   6
   7 #include <limits>
   8
   9 #include "base/logging.h"
  10 #include "grit/ui_resources.h"
  11 #include "ui/base/layout.h"
  12 #include "ui/base/nine_image_painter_factory.h"
  13 #include "ui/gfx/canvas.h"
  14 #include "ui/gfx/image/image_skia.h"
  15 #include "ui/gfx/nine_image_painter.h"
  16 #include "ui/gfx/path.h"
  17 #include "ui/gfx/rect.h"
  18 #include "ui/gfx/size.h"
  19 #include "ui/gfx/skbitmap_operations.h"
  20 #include "ui/gfx/skia_util.h"
  21 #include "ui/native_theme/common_theme.h"
  22 #include "ui/native_theme/native_theme_switches.h"
  23
  24 using gfx::NineImagePainter;
  25
  26 #define EMPTY_IMAGE_GRID { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
  27
  28 namespace ui {
  29
  30 namespace {
  31
  32 const int kScrollbarThumbImages[NativeTheme::kNumStates][9] = {
  33   EMPTY_IMAGE_GRID,
  34   IMAGE_GRID(IDR_SCROLLBAR_THUMB_BASE_HOVER),
  35   IMAGE_GRID(IDR_SCROLLBAR_THUMB_BASE_NORMAL),
  36   IMAGE_GRID(IDR_SCROLLBAR_THUMB_BASE_PRESSED)
  37 };
  38
  39 const int kScrollbarArrowButtonImages[NativeTheme::kNumStates][9] = {
  40   EMPTY_IMAGE_GRID,
  41   IMAGE_GRID(IDR_SCROLLBAR_ARROW_BUTTON_BASE_HOVER),
  42   IMAGE_GRID(IDR_SCROLLBAR_ARROW_BUTTON_BASE_NORMAL),
  43   IMAGE_GRID(IDR_SCROLLBAR_ARROW_BUTTON_BASE_PRESSED)
  44 };
  45
  46 const uint8 kScrollbarOverlayThumbFillAlphas[NativeTheme::kNumStates] = {
  47   0,    // Does not matter, will not paint for disabled state.
  48   178,  // Hover state, opacity 70%, alpha would be 0.7 * 255.
  49   140,  // Normal state, opacity 55%, alpha would be 0.55 * 255.
  50   178   // Pressed state, opacity 70%, alpha would be 0.7 * 255.
  51 };
  52
  53 const uint8 kScrollbarOverlayThumbStrokeAlphas[NativeTheme::kNumStates] = {
  54   0,   // Does not matter, will not paint for disabled state.
  55   51,  // Hover state, opacity 20%, alpha would be 0.2 * 255.
  56   38,  // Normal state, opacity 15%, alpha would be 0.15 * 255.
  57   51   // Pressed state, opacity 20%, alpha would be 0.2 * 255.
  58 };
  59
  60 const int kScrollbarOverlayThumbStrokeImages[9] =
  61     IMAGE_GRID_NO_CENTER(IDR_SCROLLBAR_OVERLAY_THUMB_STROKE);
  62
  63 const int kScrollbarOverlayThumbFillImages[9] =
  64     IMAGE_GRID(IDR_SCROLLBAR_OVERLAY_THUMB_FILL);
  65
  66 const int kScrollbarTrackImages[9] = IMAGE_GRID(IDR_SCROLLBAR_BASE);
  67
  68 }  // namespace
  69
  70 #if !defined(OS_WIN)
  71 // static
  72 NativeTheme* NativeTheme::instance() {
  73   return NativeThemeAura::instance();
  74 }
  75
  76 // static
  77 NativeThemeAura* NativeThemeAura::instance() {
  78   CR_DEFINE_STATIC_LOCAL(NativeThemeAura, s_native_theme, ());
  79   return &s_native_theme;
  80 }
  81 #endif
  82
  83 NativeThemeAura::NativeThemeAura() {
  84   // We don't draw scrollbar buttons.
  85 #if defined(OS_CHROMEOS)
  86   set_scrollbar_button_length(0);
  87 #endif
  88
  89   // Images and alphas declarations assume the following order.
  90   COMPILE_ASSERT(kDisabled == 0, states_unexpectedly_changed);
  91   COMPILE_ASSERT(kHovered == 1, states_unexpectedly_changed);
  92   COMPILE_ASSERT(kNormal == 2, states_unexpectedly_changed);
  93   COMPILE_ASSERT(kPressed == 3, states_unexpectedly_changed);
  94 }
  95
  96 NativeThemeAura::~NativeThemeAura() {
  97 }
  98
  99 void NativeThemeAura::PaintMenuPopupBackground(
 100     SkCanvas* canvas,
 101     const gfx::Size& size,
 102     const MenuBackgroundExtraParams& menu_background) const {
 103   SkColor color = GetSystemColor(NativeTheme::kColorId_MenuBackgroundColor);
 104   if (menu_background.corner_radius > 0) {
 105     SkPaint paint;
 106     paint.setStyle(SkPaint::kFill_Style);
 107     paint.setFlags(SkPaint::kAntiAlias_Flag);
 108     paint.setColor(color);
 109
 110     gfx::Path path;
 111     SkRect rect = SkRect::MakeWH(SkIntToScalar(size.width()),
 112                                  SkIntToScalar(size.height()));
 113     SkScalar radius = SkIntToScalar(menu_background.corner_radius);
 114     SkScalar radii[8] = {radius, radius, radius, radius,
 115                          radius, radius, radius, radius};
 116     path.addRoundRect(rect, radii);
 117
 118     canvas->drawPath(path, paint);
 119   } else {
 120     canvas->drawColor(color, SkXfermode::kSrc_Mode);
 121   }
 122 }
 123
 124 void NativeThemeAura::PaintMenuItemBackground(
 125     SkCanvas* canvas,
 126     State state,
 127     const gfx::Rect& rect,
 128     const MenuListExtraParams& menu_list) const {
 129   CommonThemePaintMenuItemBackground(canvas, state, rect);
 130 }
 131
 132 void NativeThemeAura::PaintArrowButton(
 133       SkCanvas* gc,
 134       const gfx::Rect& rect,
 135       Part direction,
 136       State state) const {
 137   if (direction == kInnerSpinButton) {
 138     FallbackTheme::PaintArrowButton(gc, rect, direction, state);
 139     return;
 140   }
 141   PaintPainter(GetOrCreatePainter(
 142                    kScrollbarArrowButtonImages, state,
 143                    scrollbar_arrow_button_painters_),
 144                gc, rect);
 145
 146   // Aura-win uses slightly different arrow colors.
 147   SkColor arrow_color = GetArrowColor(state);
 148   switch (state) {
 149     case kHovered:
 150     case kNormal:
 151       arrow_color = SkColorSetRGB(0x50, 0x50, 0x50);
 152       break;
 153     case kPressed:
 154       arrow_color = SK_ColorWHITE;
 155     default:
 156       break;
 157   }
 158   PaintArrow(gc, rect, direction, arrow_color);
 159 }
 160
 161 void NativeThemeAura::PaintScrollbarTrack(
 162     SkCanvas* sk_canvas,
 163     Part part,
 164     State state,
 165     const ScrollbarTrackExtraParams& extra_params,
 166     const gfx::Rect& rect) const {
 167   // Overlay Scrollbar should never paint a scrollbar track.
 168   DCHECK(!IsOverlayScrollbarEnabled());
 169   if (!scrollbar_track_painter_)
 170     scrollbar_track_painter_ = CreateNineImagePainter(kScrollbarTrackImages);
 171   PaintPainter(scrollbar_track_painter_.get(), sk_canvas, rect);
 172 }
 173
 174 void NativeThemeAura::PaintScrollbarThumb(SkCanvas* sk_canvas,
 175                                           Part part,
 176                                           State state,
 177                                           const gfx::Rect& rect) const {
 178   gfx::Rect thumb_rect(rect);
 179   if (IsOverlayScrollbarEnabled()) {
 180     // Overlay scrollbar has no track, just paint thumb directly.
 181     // Do not paint if state is disabled.
 182     if (state == kDisabled)
 183       return;
 184
 185     if (!scrollbar_overlay_thumb_painter_) {
 186       scrollbar_overlay_thumb_painter_ =
 187           CreateDualPainter(kScrollbarOverlayThumbFillImages,
 188                             kScrollbarOverlayThumbFillAlphas,
 189                             kScrollbarOverlayThumbStrokeImages,
 190                             kScrollbarOverlayThumbStrokeAlphas);
 191     }
 192
 193     PaintDualPainter(
 194         scrollbar_overlay_thumb_painter_.get(), sk_canvas, thumb_rect, state);
 195     return;
 196   }
 197   // If there are no scrollbuttons then provide some padding so that thumb
 198   // doesn't touch the top of the track.
 199   const int extra_padding = (scrollbar_button_length() == 0) ? 2 : 0;
 200   if (part == NativeTheme::kScrollbarVerticalThumb)
 201     thumb_rect.Inset(2, extra_padding, 2, extra_padding);
 202   else
 203     thumb_rect.Inset(extra_padding, 2, extra_padding, 2);
 204   PaintPainter(GetOrCreatePainter(
 205                    kScrollbarThumbImages, state, scrollbar_thumb_painters_),
 206                sk_canvas,
 207                thumb_rect);
 208 }
 209
 210 void NativeThemeAura::PaintScrollbarThumbStateTransition(
 211     SkCanvas* canvas,
 212     State startState,
 213     State endState,
 214     double progress,
 215     const gfx::Rect& rect) const {
 216   // Only Overlay scrollbars should have state transition animation.
 217   DCHECK(IsOverlayScrollbarEnabled());
 218   if (!scrollbar_overlay_thumb_painter_) {
 219     scrollbar_overlay_thumb_painter_ =
 220         CreateDualPainter(kScrollbarOverlayThumbFillImages,
 221                           kScrollbarOverlayThumbFillAlphas,
 222                           kScrollbarOverlayThumbStrokeImages,
 223                           kScrollbarOverlayThumbStrokeAlphas);
 224   }
 225
 226   PaintDualPainterTransition(scrollbar_overlay_thumb_painter_.get(),
 227                              canvas,
 228                              rect,
 229                              startState,
 230                              endState,
 231                              progress);
 232 }
 233
 234 void NativeThemeAura::PaintScrollbarCorner(SkCanvas* canvas,
 235                                            State state,
 236                                            const gfx::Rect& rect) const {
 237   // Overlay Scrollbar should never paint a scrollbar corner.
 238   DCHECK(!IsOverlayScrollbarEnabled());
 239   SkPaint paint;
 240   paint.setColor(SkColorSetRGB(0xF1, 0xF1, 0xF1));
 241   paint.setStyle(SkPaint::kFill_Style);
 242   paint.setXfermodeMode(SkXfermode::kSrc_Mode);
 243   canvas->drawIRect(RectToSkIRect(rect), paint);
 244 }
 245
 246 NineImagePainter* NativeThemeAura::GetOrCreatePainter(
 247     const int images[kNumStates][9],
 248     State state,
 249     scoped_ptr<NineImagePainter> painters[kNumStates]) const {
 250   if (painters[state])
 251     return painters[state].get();
 252   if (images[state][0] == 0) {
 253     // Must always provide normal state images.
 254     DCHECK_NE(kNormal, state);
 255     return GetOrCreatePainter(images, kNormal, painters);
 256   }
 257   painters[state] = CreateNineImagePainter(images[state]);
 258   return painters[state].get();
 259 }
 260
 261 void NativeThemeAura::PaintPainter(NineImagePainter* painter,
 262                                    SkCanvas* sk_canvas,
 263                                    const gfx::Rect& rect) const {
 264   DCHECK(painter);
 265   scoped_ptr<gfx::Canvas> canvas(CommonThemeCreateCanvas(sk_canvas));
 266   painter->Paint(canvas.get(), rect);
 267 }
 268
 269 scoped_ptr<NativeThemeAura::DualPainter> NativeThemeAura::CreateDualPainter(
 270     const int fill_image_ids[9],
 271     const uint8 fill_alphas[kNumStates],
 272     const int stroke_image_ids[9],
 273     const uint8 stroke_alphas[kNumStates]) const {
 274   scoped_ptr<NativeThemeAura::DualPainter> dual_painter(
 275       new NativeThemeAura::DualPainter(CreateNineImagePainter(fill_image_ids),
 276                                        fill_alphas,
 277                                        CreateNineImagePainter(stroke_image_ids),
 278                                        stroke_alphas));
 279   return dual_painter.Pass();
 280 }
 281
 282 void NativeThemeAura::PaintDualPainter(
 283     NativeThemeAura::DualPainter* dual_painter,
 284     SkCanvas* sk_canvas,
 285     const gfx::Rect& rect,
 286     State state) const {
 287   DCHECK(dual_painter);
 288   scoped_ptr<gfx::Canvas> canvas(CommonThemeCreateCanvas(sk_canvas));
 289   dual_painter->fill_painter->Paint(
 290       canvas.get(), rect, dual_painter->fill_alphas[state]);
 291   dual_painter->stroke_painter->Paint(
 292       canvas.get(), rect, dual_painter->stroke_alphas[state]);
 293 }
 294
 295 void NativeThemeAura::PaintDualPainterTransition(
 296     NativeThemeAura::DualPainter* dual_painter,
 297     SkCanvas* sk_canvas,
 298     const gfx::Rect& rect,
 299     State startState,
 300     State endState,
 301     double progress) const {
 302   DCHECK(dual_painter);
 303   scoped_ptr<gfx::Canvas> canvas(CommonThemeCreateCanvas(sk_canvas));
 304   uint8 fill_alpha = dual_painter->fill_alphas[startState] +
 305                      (dual_painter->fill_alphas[endState] -
 306                       dual_painter->fill_alphas[startState]) *
 307                          progress;
 308   uint8 stroke_alpha = dual_painter->stroke_alphas[startState] +
 309                        (dual_painter->stroke_alphas[endState] -
 310                         dual_painter->stroke_alphas[startState]) *
 311                            progress;
 312
 313   dual_painter->fill_painter->Paint(canvas.get(), rect, fill_alpha);
 314   dual_painter->stroke_painter->Paint(canvas.get(), rect, stroke_alpha);
 315 }
 316
 317 NativeThemeAura::DualPainter::DualPainter(
 318     scoped_ptr<NineImagePainter> fill_painter,
 319     const uint8 fill_alphas[kNumStates],
 320     scoped_ptr<NineImagePainter> stroke_painter,
 321     const uint8 stroke_alphas[kNumStates])
 322     : fill_painter(fill_painter.Pass()),
 323       fill_alphas(fill_alphas),
 324       stroke_painter(stroke_painter.Pass()),
 325       stroke_alphas(stroke_alphas) {}
 326
 327 NativeThemeAura::DualPainter::~DualPainter() {}
 328
 329 }  // namespace ui