chromium/third_party/blink/renderer/platform/theme/web_theme_engine_default.cc

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/platform/theme/web_theme_engine_default.h"

#include "build/build_config.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/abseil-cpp/absl/types/variant.h"
#include "third_party/blink/public/platform/web_theme_engine.h"
#include "third_party/blink/renderer/platform/graphics/scrollbar_theme_settings.h"
#include "third_party/blink/renderer/platform/theme/web_theme_engine_conversions.h"
#include "third_party/blink/renderer/platform/web_test_support.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "ui/color/color_provider_utils.h"
#include "ui/gfx/color_palette.h"
#include "ui/native_theme/native_theme.h"
#include "ui/native_theme/native_theme_features.h"
#include "ui/native_theme/overlay_scrollbar_constants_aura.h"

namespace blink {

ColorScheme;

namespace {

#if BUILDFLAG(IS_WIN)
// The width of a vertical scroll bar in dips.
int32_t g_vertical_scroll_bar_width;

// The height of a horizontal scroll bar in dips.
int32_t g_horizontal_scroll_bar_height;

// The height of the arrow bitmap on a vertical scroll bar in dips.
int32_t g_vertical_arrow_bitmap_height;

// The width of the arrow bitmap on a horizontal scroll bar in dips.
int32_t g_horizontal_arrow_bitmap_width;
#endif

}  // namespace

static ui::NativeTheme::ExtraParams GetNativeThemeExtraParams(
    WebThemeEngine::Part part,
    WebThemeEngine::State state,
    const WebThemeEngine::ExtraParams* extra_params) { … }

WebThemeEngineDefault::WebThemeEngineDefault() = default;

WebThemeEngineDefault::~WebThemeEngineDefault() = default;

gfx::Size WebThemeEngineDefault::GetSize(WebThemeEngine::Part part) { … }

void WebThemeEngineDefault::Paint(
    cc::PaintCanvas* canvas,
    WebThemeEngine::Part part,
    WebThemeEngine::State state,
    const gfx::Rect& rect,
    const WebThemeEngine::ExtraParams* extra_params,
    mojom::ColorScheme color_scheme,
    bool in_forced_colors,
    const ui::ColorProvider* color_provider,
    const std::optional<SkColor>& accent_color) { … }

gfx::Insets WebThemeEngineDefault::GetScrollbarSolidColorThumbInsets(
    Part part) const { … }

SkColor4f WebThemeEngineDefault::GetScrollbarThumbColor(
    WebThemeEngine::State state,
    const WebThemeEngine::ExtraParams* extra_params,
    const ui::ColorProvider* color_provider) const { … }

void WebThemeEngineDefault::GetOverlayScrollbarStyle(ScrollbarStyle* style) { … }

bool WebThemeEngineDefault::SupportsNinePatch(Part part) const { … }

gfx::Size WebThemeEngineDefault::NinePatchCanvasSize(Part part) const { … }

gfx::Rect WebThemeEngineDefault::NinePatchAperture(Part part) const { … }

bool WebThemeEngineDefault::IsFluentScrollbarEnabled() const { … }

bool WebThemeEngineDefault::IsFluentOverlayScrollbarEnabled() const { … }

int WebThemeEngineDefault::GetPaintedScrollbarTrackInset() const { … }

std::optional<SkColor> WebThemeEngineDefault::GetAccentColor() const { … }

#if BUILDFLAG(IS_WIN)
// static
void WebThemeEngineDefault::cacheScrollBarMetrics(
    int32_t vertical_scroll_bar_width,
    int32_t horizontal_scroll_bar_height,
    int32_t vertical_arrow_bitmap_height,
    int32_t horizontal_arrow_bitmap_width) {
  g_vertical_scroll_bar_width = vertical_scroll_bar_width;
  g_horizontal_scroll_bar_height = horizontal_scroll_bar_height;
  g_vertical_arrow_bitmap_height = vertical_arrow_bitmap_height;
  g_horizontal_arrow_bitmap_width = horizontal_arrow_bitmap_width;
}
#endif

}  // namespace blink