blob: edc3029fa71d603ffa1606f1c048e94cde56001b [file] [log] [blame]
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/native_theme/native_theme_mac.h"
#import <Cocoa/Cocoa.h>
#include "base/basictypes.h"
#include "base/mac/mac_util.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/sdk_forward_declarations.h"
#import "skia/ext/skia_utils_mac.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/skia_util.h"
#include "ui/native_theme/common_theme.h"
namespace {
const SkColor kScrollerTrackGradientColors[] = {
SkColorSetRGB(0xEF, 0xEF, 0xEF),
SkColorSetRGB(0xF9, 0xF9, 0xF9),
SkColorSetRGB(0xFD, 0xFD, 0xFD),
SkColorSetRGB(0xF6, 0xF6, 0xF6) };
const SkColor kScrollerTrackInnerBorderColor = SkColorSetRGB(0xE4, 0xE4, 0xE4);
const SkColor kScrollerTrackOuterBorderColor = SkColorSetRGB(0xEF, 0xEF, 0xEF);
const SkColor kScrollerThumbColor = SkColorSetARGB(0x38, 0, 0, 0);
const SkColor kScrollerThumbHoverColor = SkColorSetARGB(0x80, 0, 0, 0);
const int kScrollerTrackBorderWidth = 1;
// The amount the thumb is inset from both the ends and the sides of the track.
const int kScrollerThumbInset = 3;
// Values calculated by reading pixels and solving simultaneous equations
// derived from "A over B" alpha compositing. Steps: Sample the semi-transparent
// pixel over two backgrounds; P1, P2 over backgrounds B1, B2. Use the color
// value between 0.0 and 1.0 (i.e. divide by 255.0). Then,
// alpha = (P2 - P1 + B1 - B2) / (B1 - B2)
// color = (P1 - B1 + alpha * B1) / alpha.
const SkColor kMenuPopupBackgroundColor = SkColorSetARGB(255, 255, 255, 255);
const SkColor kMenuSeparatorColor = SkColorSetARGB(243, 228, 228, 228);
const SkColor kMenuBorderColor = SkColorSetARGB(60, 0, 0, 0);
const SkColor kMenuPopupBackgroundColorYosemite =
SkColorSetARGB(255, 230, 230, 230);
// Hardcoded color used for some existing dialogs in Chrome's Cocoa UI.
const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
// Color for the highlighted text in a control when that control doesn't have
// keyboard focus.
const SkColor kUnfocusedSelectedTextBackgroundColor =
SkColorSetRGB(220, 220, 220);
// On 10.6 and 10.7 there is no way to get components from system colors. Here,
// system colors are just opaque objects that can paint themselves and otherwise
// tell you nothing. In 10.8, some of the system color classes have incomplete
// implementations and throw exceptions even attempting to convert using
// -[NSColor colorUsingColorSpace:], so don't bother there either.
// This function paints a single pixel to a 1x1 swatch and reads it back.
SkColor GetSystemColorUsingSwatch(NSColor* color) {
SkColor swatch;
base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
const size_t bytes_per_row = 4;
static_assert(sizeof(swatch) == bytes_per_row, "skcolor should be 4 bytes");
CGBitmapInfo bitmap_info =
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
base::ScopedCFTypeRef<CGContextRef> context(CGBitmapContextCreate(
&swatch, 1, 1, 8, bytes_per_row, color_space, bitmap_info));
NSGraphicsContext* drawing_context =
[NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
[NSGraphicsContext saveGraphicsState];
[NSGraphicsContext setCurrentContext:drawing_context];
[color drawSwatchInRect:NSMakeRect(0, 0, 1, 1)];
[NSGraphicsContext restoreGraphicsState];
return swatch;
}
// NSColor has a number of methods that return system colors (i.e. controlled by
// user preferences). This function converts the color given by an NSColor class
// method to an SkColor. Official documentation suggests developers only rely on
// +[NSColor selectedTextBackgroundColor] and +[NSColor selectedControlColor],
// but other colors give a good baseline. For many, a gradient is involved; the
// palette chosen based on the enum value given by +[NSColor currentColorTint].
// Apple's documentation also suggests to use NSColorList, but the system color
// list is just populated with class methods on NSColor.
SkColor NSSystemColorToSkColor(NSColor* color) {
if (base::mac::IsOSMountainLionOrEarlier())
return GetSystemColorUsingSwatch(color);
// System colors use the an NSNamedColorSpace called "System", so first step
// is to convert the color into something that can be worked with.
NSColor* device_color =
[color colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
if (device_color)
return skia::NSDeviceColorToSkColor(device_color);
// Sometimes the conversion is not possible, but we can get an approximation
// by going through a CGColorRef. Note that simply using NSColor methods for
// accessing components for system colors results in exceptions like
// "-numberOfComponents not valid for the NSColor NSNamedColorSpace System
// windowBackgroundColor; need to first convert colorspace." Hence the
// conversion first to CGColor.
CGColorRef cg_color = [color CGColor];
const size_t component_count = CGColorGetNumberOfComponents(cg_color);
if (component_count == 4)
return skia::CGColorRefToSkColor(cg_color);
CHECK(component_count == 1 || component_count == 2);
// 1-2 components means a grayscale channel and maybe an alpha channel, which
// CGColorRefToSkColor will not like. But RGB is additive, so the conversion
// is easy (RGB to grayscale is less easy).
const CGFloat* components = CGColorGetComponents(cg_color);
CGFloat alpha = component_count == 2 ? components[1] : 1.0;
return SkColorSetARGB(SkScalarRoundToInt(255.0 * alpha),
SkScalarRoundToInt(255.0 * components[0]),
SkScalarRoundToInt(255.0 * components[0]),
SkScalarRoundToInt(255.0 * components[0]));
}
} // namespace
namespace ui {
// static
NativeTheme* NativeTheme::GetInstanceForWeb() {
return NativeThemeMac::instance();
}
// static
NativeThemeMac* NativeThemeMac::instance() {
CR_DEFINE_STATIC_LOCAL(NativeThemeMac, s_native_theme, ());
return &s_native_theme;
}
SkColor NativeThemeMac::GetSystemColor(ColorId color_id) const {
// TODO(tapted): Add caching for these, and listen for
// NSSystemColorsDidChangeNotification.
switch (color_id) {
case kColorId_WindowBackground:
return NSSystemColorToSkColor([NSColor windowBackgroundColor]);
case kColorId_DialogBackground:
return kDialogBackgroundColor;
case kColorId_BubbleBackground:
return SK_ColorWHITE;
case kColorId_FocusedBorderColor:
case kColorId_FocusedMenuButtonBorderColor:
return NSSystemColorToSkColor([NSColor keyboardFocusIndicatorColor]);
case kColorId_UnfocusedBorderColor:
return NSSystemColorToSkColor([NSColor controlColor]);
// Buttons and labels.
case kColorId_ButtonBackgroundColor:
case kColorId_ButtonHoverBackgroundColor:
case kColorId_HoverMenuButtonBorderColor:
case kColorId_LabelBackgroundColor:
return NSSystemColorToSkColor([NSColor controlBackgroundColor]);
case kColorId_ButtonEnabledColor:
case kColorId_EnabledMenuButtonBorderColor:
case kColorId_LabelEnabledColor:
return NSSystemColorToSkColor([NSColor controlTextColor]);
case kColorId_ButtonDisabledColor:
case kColorId_LabelDisabledColor:
return NSSystemColorToSkColor([NSColor disabledControlTextColor]);
case kColorId_ButtonHighlightColor:
case kColorId_ButtonHoverColor:
return NSSystemColorToSkColor([NSColor selectedControlTextColor]);
// Menus.
case kColorId_EnabledMenuItemForegroundColor:
return NSSystemColorToSkColor([NSColor controlTextColor]);
case kColorId_DisabledMenuItemForegroundColor:
case kColorId_DisabledEmphasizedMenuItemForegroundColor:
return NSSystemColorToSkColor([NSColor disabledControlTextColor]);
case kColorId_SelectedMenuItemForegroundColor:
return NSSystemColorToSkColor([NSColor selectedMenuItemTextColor]);
case kColorId_FocusedMenuItemBackgroundColor:
case kColorId_HoverMenuItemBackgroundColor:
return NSSystemColorToSkColor([NSColor selectedMenuItemColor]);
case kColorId_MenuBackgroundColor:
return kMenuPopupBackgroundColor;
case kColorId_MenuSeparatorColor:
return kMenuSeparatorColor;
case kColorId_MenuBorderColor:
return kMenuBorderColor;
// Link.
case kColorId_LinkDisabled:
return SK_ColorBLACK;
case kColorId_LinkEnabled:
return SK_ColorBLUE;
case kColorId_LinkPressed:
return SK_ColorRED;
// Text fields.
case kColorId_TextfieldDefaultColor:
case kColorId_TextfieldReadOnlyColor:
return NSSystemColorToSkColor([NSColor textColor]);
case kColorId_TextfieldDefaultBackground:
case kColorId_TextfieldReadOnlyBackground:
return NSSystemColorToSkColor([NSColor textBackgroundColor]);
case kColorId_TextfieldSelectionColor:
return NSSystemColorToSkColor([NSColor selectedTextColor]);
case kColorId_TextfieldSelectionBackgroundFocused:
return NSSystemColorToSkColor([NSColor selectedTextBackgroundColor]);
// Trees/Tables. For focused text, use the alternate* versions, which
// NSColor documents as "the table and list view equivalent to the
// selectedControlTextColor".
case kColorId_TreeBackground:
case kColorId_TableBackground:
return NSSystemColorToSkColor([NSColor controlBackgroundColor]);
case kColorId_TreeText:
case kColorId_TableText:
case kColorId_TableSelectedTextUnfocused:
case kColorId_TreeSelectedTextUnfocused:
return NSSystemColorToSkColor([NSColor textColor]);
case kColorId_TreeSelectedText:
case kColorId_TableSelectedText:
return NSSystemColorToSkColor(
[NSColor alternateSelectedControlTextColor]);
case kColorId_TreeSelectionBackgroundFocused:
case kColorId_TableSelectionBackgroundFocused:
return NSSystemColorToSkColor([NSColor alternateSelectedControlColor]);
case kColorId_TreeSelectionBackgroundUnfocused:
case kColorId_TableSelectionBackgroundUnfocused:
return kUnfocusedSelectedTextBackgroundColor;
case kColorId_TreeArrow:
case kColorId_TableGroupingIndicatorColor:
return SkColorSetRGB(140, 140, 140);
default:
// TODO(tapted): Handle all values and remove the default case.
return GetAuraColor(color_id, this);
}
}
void NativeThemeMac::PaintScrollbarTrack(
SkCanvas* canvas,
Part part,
State state,
const ScrollbarTrackExtraParams& extra_params,
const gfx::Rect& rect) const {
// Emulate the non-overlay scroller style from OSX 10.7 and later.
SkPoint gradient_bounds[2];
if (part == kScrollbarVerticalTrack) {
gradient_bounds[0].set(rect.x(), rect.y());
gradient_bounds[1].set(rect.right(), rect.y());
} else {
DCHECK_EQ(part, kScrollbarHorizontalTrack);
gradient_bounds[0].set(rect.x(), rect.y());
gradient_bounds[1].set(rect.x(), rect.bottom());
}
skia::RefPtr<SkShader> shader = skia::AdoptRef(
SkGradientShader::CreateLinear(gradient_bounds,
kScrollerTrackGradientColors,
NULL,
arraysize(kScrollerTrackGradientColors),
SkShader::kClamp_TileMode));
SkPaint gradient;
gradient.setShader(shader.get());
SkIRect track_rect = gfx::RectToSkIRect(rect);
canvas->drawIRect(track_rect, gradient);
// Draw inner and outer line borders.
if (part == kScrollbarVerticalTrack) {
SkPaint paint;
paint.setColor(kScrollerTrackInnerBorderColor);
canvas->drawRectCoords(track_rect.left(),
track_rect.top(),
track_rect.left() + kScrollerTrackBorderWidth,
track_rect.bottom(),
paint);
paint.setColor(kScrollerTrackOuterBorderColor);
canvas->drawRectCoords(track_rect.right() - kScrollerTrackBorderWidth,
track_rect.top(),
track_rect.right(),
track_rect.bottom(),
paint);
} else {
SkPaint paint;
paint.setColor(kScrollerTrackInnerBorderColor);
canvas->drawRectCoords(track_rect.left(),
track_rect.top(),
track_rect.right(),
track_rect.top() + kScrollerTrackBorderWidth,
paint);
paint.setColor(kScrollerTrackOuterBorderColor);
canvas->drawRectCoords(track_rect.left(),
track_rect.bottom() - kScrollerTrackBorderWidth,
track_rect.right(),
track_rect.bottom(),
paint);
}
}
void NativeThemeMac::PaintScrollbarThumb(SkCanvas* canvas,
Part part,
State state,
const gfx::Rect& rect) const {
gfx::Rect thumb_rect(rect);
switch (part) {
case kScrollbarHorizontalThumb:
thumb_rect.Inset(0, kScrollerTrackBorderWidth, 0, 0);
break;
case kScrollbarVerticalThumb:
thumb_rect.Inset(kScrollerTrackBorderWidth, 0, 0, 0);
break;
default:
NOTREACHED();
break;
}
thumb_rect.Inset(kScrollerThumbInset, kScrollerThumbInset);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(state == kHovered ? thumb_active_color_
: thumb_inactive_color_);
const SkScalar radius = std::min(rect.width(), rect.height());
canvas->drawRoundRect(gfx::RectToSkRect(thumb_rect), radius, radius, paint);
}
void NativeThemeMac::PaintScrollbarCorner(SkCanvas* canvas,
State state,
const gfx::Rect& rect) const {
DCHECK_GT(rect.width(), 0);
DCHECK_GT(rect.height(), 0);
// Draw radial gradient from top-left corner.
skia::RefPtr<SkShader> shader = skia::AdoptRef(
SkGradientShader::CreateRadial(SkPoint::Make(rect.x(), rect.y()),
rect.width(),
kScrollerTrackGradientColors,
NULL,
arraysize(kScrollerTrackGradientColors),
SkShader::kClamp_TileMode));
SkPaint gradient;
gradient.setStyle(SkPaint::kFill_Style);
gradient.setAntiAlias(true);
gradient.setShader(shader.get());
canvas->drawRect(gfx::RectToSkRect(rect), gradient);
// Draw inner border corner point.
canvas->drawPoint(rect.x(), rect.y(), kScrollerTrackInnerBorderColor);
// Draw outer borders.
SkPaint paint;
paint.setColor(kScrollerTrackOuterBorderColor);
canvas->drawRectCoords(rect.right() - kScrollerTrackBorderWidth,
rect.y(),
rect.right(),
rect.bottom(),
paint);
canvas->drawRectCoords(rect.x(),
rect.bottom() - kScrollerTrackBorderWidth,
rect.right(),
rect.bottom(),
paint);
}
void NativeThemeMac::PaintMenuPopupBackground(
SkCanvas* canvas,
const gfx::Size& size,
const MenuBackgroundExtraParams& menu_background) const {
SkPaint paint;
paint.setAntiAlias(true);
if (base::mac::IsOSYosemiteOrLater())
paint.setColor(kMenuPopupBackgroundColorYosemite);
else
paint.setColor(kMenuPopupBackgroundColor);
const SkScalar radius = SkIntToScalar(menu_background.corner_radius);
SkRect rect = gfx::RectToSkRect(gfx::Rect(size));
canvas->drawRoundRect(rect, radius, radius, paint);
}
void NativeThemeMac::PaintMenuItemBackground(
SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const MenuListExtraParams& menu_list) const {
SkPaint paint;
switch (state) {
case NativeTheme::kNormal:
case NativeTheme::kDisabled:
// Draw nothing over the regular background.
break;
case NativeTheme::kHovered:
// TODO(tapted): Draw a gradient, and use [NSColor currentControlTint] to
// pick colors. The System color "selectedMenuItemColor" is actually still
// blue for Graphite. And while "keyboardFocusIndicatorColor" does change,
// and is a good shade of gray, it's not blue enough for the Blue theme.
paint.setColor(GetSystemColor(kColorId_HoverMenuItemBackgroundColor));
canvas->drawRect(gfx::RectToSkRect(rect), paint);
break;
default:
NOTREACHED();
break;
}
}
NativeThemeMac::NativeThemeMac() {
set_scrollbar_button_length(0);
SetScrollbarColors(kScrollerThumbColor,
kScrollerThumbHoverColor,
kScrollerTrackGradientColors[0]);
}
NativeThemeMac::~NativeThemeMac() {
}
} // namespace ui