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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_NATIVE_THEME_NATIVE_THEME_BASE_H_
#define UI_NATIVE_THEME_NATIVE_THEME_BASE_H_
#include "base/component_export.h"
#include "base/gtest_prod_util.h"
#include "cc/paint/paint_flags.h"
#include "ui/native_theme/native_theme.h"
namespace gfx {
class Rect;
class Size;
} // namespace gfx
namespace ui {
// Theme support for non-Windows toolkits.
class COMPONENT_EXPORT(NATIVE_THEME) NativeThemeBase : public NativeTheme {
public:
NativeThemeBase(const NativeThemeBase&) = delete;
NativeThemeBase& operator=(const NativeThemeBase&) = delete;
// NativeTheme implementation:
gfx::Size GetPartSize(Part part,
State state,
const ExtraParams& extra) const override;
float GetBorderRadiusForPart(Part part,
float width,
float height) const override;
void Paint(cc::PaintCanvas* canvas,
const ui::ColorProvider* color_provider,
Part part,
State state,
const gfx::Rect& rect,
const ExtraParams& extra,
ColorScheme color_scheme,
bool in_forced_colors,
const std::optional<SkColor>& accent_color) const override;
bool SupportsNinePatch(Part part) const override;
gfx::Size GetNinePatchCanvasSize(Part part) const override;
gfx::Rect GetNinePatchAperture(Part part) const override;
protected:
// Colors for form controls refresh.
enum ControlColorId {
kBorder,
kDisabledBorder,
kHoveredBorder,
kPressedBorder,
kAccent,
kDisabledAccent,
kHoveredAccent,
kPressedAccent,
kBackground,
kDisabledBackground,
kFill,
kDisabledFill,
kHoveredFill,
kPressedFill,
kLightenLayer,
kProgressValue,
kSlider,
kDisabledSlider,
kHoveredSlider,
kPressedSlider,
kAutoCompleteBackground,
kScrollbarArrowBackground,
kScrollbarArrowBackgroundHovered,
kScrollbarArrowBackgroundPressed,
kScrollbarArrow,
kScrollbarArrowHovered,
kScrollbarArrowPressed,
// TODO(crbug.com/40242489): kScrollbarCorner overlaps with
// NativeTheme::Part::kScrollbarCorner. Make ControlColorId a enum class
// or remove the class completely in favor of ColorProvider colors.
kScrollbarCornerControlColorId,
kScrollbarTrack,
kScrollbarThumb,
kScrollbarThumbHovered,
kScrollbarThumbPressed,
kScrollbarThumbInactive,
kButtonBorder,
kButtonDisabledBorder,
kButtonHoveredBorder,
kButtonPressedBorder,
kButtonFill,
kButtonDisabledFill,
kButtonHoveredFill,
kButtonPressedFill
};
using NativeTheme::NativeTheme;
NativeThemeBase();
explicit NativeThemeBase(
bool should_only_use_dark_colors,
ui::SystemTheme system_theme = ui::SystemTheme::kDefault);
~NativeThemeBase() override;
// Draw the arrow. Used by scrollbar and inner spin button.
virtual void PaintArrowButton(
cc::PaintCanvas* gc,
const ColorProvider* color_provider,
const gfx::Rect& rect,
Part direction,
State state,
ColorScheme color_scheme,
bool in_forced_colors,
const ScrollbarArrowExtraParams& extra_params) const;
// Paint the scrollbar track. Done before the thumb so that it can contain
// alpha.
virtual void PaintScrollbarTrack(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
Part part,
State state,
const ScrollbarTrackExtraParams& extra_params,
const gfx::Rect& rect,
ColorScheme color_scheme,
bool in_forced_colors) const;
// Draw the scrollbar thumb over the track.
virtual void PaintScrollbarThumb(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
Part part,
State state,
const gfx::Rect& rect,
const ScrollbarThumbExtraParams& extra_params,
ColorScheme color_scheme) const;
virtual void PaintScrollbarCorner(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const ScrollbarTrackExtraParams& extra_params,
ColorScheme color_scheme) const;
void PaintCheckbox(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button,
ColorScheme color_scheme,
const std::optional<SkColor>& accent_color) const;
void PaintRadio(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button,
ColorScheme color_scheme,
const std::optional<SkColor>& accent_color) const;
void PaintButton(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button,
ColorScheme color_scheme) const;
void PaintTextField(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const TextFieldExtraParams& text,
ColorScheme color_scheme) const;
void PaintMenuList(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const MenuListExtraParams& menu_list,
ColorScheme color_scheme) const;
virtual void PaintMenuPopupBackground(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
const gfx::Size& size,
const MenuBackgroundExtraParams& menu_background,
ColorScheme color_scheme) const;
virtual void PaintMenuItemBackground(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const MenuItemExtraParams& menu_item,
ColorScheme color_scheme) const;
virtual void PaintMenuSeparator(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const MenuSeparatorExtraParams& menu_separator) const;
void PaintSliderTrack(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const SliderExtraParams& slider,
ColorScheme color_scheme,
const std::optional<SkColor>& accent_color) const;
void PaintSliderThumb(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const SliderExtraParams& slider,
ColorScheme color_scheme,
const std::optional<SkColor>& accent_color) const;
virtual void PaintInnerSpinButton(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const InnerSpinButtonExtraParams& spin_button,
ColorScheme color_scheme,
bool in_forced_colors) const;
void PaintProgressBar(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const ProgressBarExtraParams& progress_bar,
ColorScheme color_scheme,
const std::optional<SkColor>& accent_color) const;
virtual void PaintFrameTopArea(cc::PaintCanvas* canvas,
State state,
const gfx::Rect& rect,
const FrameTopAreaExtraParams& frame_top_area,
ColorScheme color_scheme) const;
virtual void PaintLightenLayer(cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
SkRect skrect,
State state,
SkScalar border_radius,
ColorScheme color_scheme) const;
// Shrinks checkbox/radio button rect, if necessary, to make room for padding
// and drop shadow.
// TODO(mohsen): This is needed because checkboxes/radio buttons on Android
// have different padding from those on desktop Chrome. Get rid of this when
// crbug.com/530746 is resolved.
virtual void AdjustCheckboxRadioRectForPadding(SkRect* rect) const;
void set_scrollbar_button_length(int length) {
scrollbar_button_length_ = length;
}
int scrollbar_button_length() const { return scrollbar_button_length_; }
SkColor SaturateAndBrighten(SkScalar* hsv,
SkScalar saturate_amount,
SkScalar brighten_amount) const;
// Paints the arrow used on the scrollbar and spinner.
void PaintArrow(cc::PaintCanvas* canvas,
const gfx::Rect& rect,
Part direction,
SkColor color) const;
SkPath PathForArrow(const gfx::Rect& bounding_rect, Part direction) const;
// Returns the color used to draw the arrow.
SkColor GetArrowColor(State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
SkColor GetControlColor(ControlColorId color_id,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
// Adjust the colors set in `extra_params` for scrollbar buttons and thumb
// when the parts are hovered or pressed. The function returns a darker or
// lighter version of `fg_color` and ensures that it has enough contrast with
// `bg_color` (if present) to still be visible. Dark colors will become
// lighter, and light colors will become lighter; whether a color is dark is
// determined by `color_utils::IsDark()`. When there are no CSS colors, both
// `fg_color` and `bg_color` are `std::nullopt` and the function returns
// `std::nullopt`.
std::optional<SkColor> GetContrastingPressedOrHoveredColor(
std::optional<SkColor> color,
std::optional<SkColor> bg_color,
State state,
Part part) const;
virtual SkColor ControlsAccentColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
virtual SkColor ControlsSliderColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
virtual SkColor ButtonBorderColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
virtual SkColor ButtonFillColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
virtual SkColor ControlsBorderColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
virtual SkColor ControlsFillColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
virtual float GetContrastRatioForState(State state, Part part) const;
// Only scrollbar parts that change colors when hovered are supported.
bool SupportedPartsForContrastingColor(Part part) const;
int scrollbar_width_ = 15;
private:
friend class NativeThemeAuraTest;
friend class NativeThemeBaseTest;
gfx::Rect BoundingRectForArrow(const gfx::Rect& rect) const;
void DrawVertLine(cc::PaintCanvas* canvas,
int x,
int y1,
int y2,
const cc::PaintFlags& flags) const;
void DrawHorizLine(cc::PaintCanvas* canvas,
int x1,
int x2,
int y,
const cc::PaintFlags& flags) const;
void DrawBox(cc::PaintCanvas* canvas,
const gfx::Rect& rect,
const cc::PaintFlags& flags) const;
SkColor OutlineColor(SkScalar* hsv1, SkScalar* hsv2) const;
// Paint the common parts of the checkboxes and radio buttons.
// border_radius specifies how rounded the corners should be.
SkRect PaintCheckboxRadioCommon(
cc::PaintCanvas* canvas,
const ColorProvider* color_provider,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button,
bool is_checkbox,
const SkScalar border_radius,
ColorScheme color_scheme,
const std::optional<SkColor>& accent_color) const;
SkColor ControlsBackgroundColorForState(
State state,
ColorScheme color_scheme,
const ColorProvider* color_provider) const;
SkColor GetDarkModeControlColor(ControlColorId color_id) const;
SkColor GetControlColorFromColorProvider(
ControlColorId color_id,
const ColorProvider* color_provider) const;
SkRect AlignSliderTrack(const gfx::Rect& slider_rect,
const NativeTheme::SliderExtraParams& slider,
bool is_value,
float track_height) const;
// Returns true if the ColorProvider color map is not empty and a color
// represented by the ControlColorId is added to the ui color mixer.
// TODO(crbug.com/40242489): Remove this function when the NativeThemeBase
// class is fully transitioned to the color pipeline and the GetControlColor()
// is deleted.
bool IsColorPipelineSupportedForControlColorId(
const ColorProvider* color_provider,
ControlColorId color_id) const;
// The length of the arrow buttons, 0 means no buttons are drawn.
int scrollbar_button_length_ = 14;
};
} // namespace ui
#endif // UI_NATIVE_THEME_NATIVE_THEME_BASE_H_
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