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gecko-dev/widget/nsNativeBasicTheme.cpp

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/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNativeBasicTheme.h"
#include "gfxBlur.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/dom/Document.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/gfx/Types.h"
#include "mozilla/gfx/Filters.h"
#include "mozilla/RelativeLuminanceUtils.h"
#include "mozilla/StaticPrefs_widget.h"
#include "mozilla/webrender/WebRenderAPI.h"
#include "nsCSSColorUtils.h"
#include "nsCSSRendering.h"
#include "nsLayoutUtils.h"
#include "PathHelpers.h"
#include "nsDeviceContext.h"
#include "nsRangeFrame.h"
#include "mozilla/dom/HTMLMeterElement.h"
#include "mozilla/dom/HTMLProgressElement.h"
using namespace mozilla;
using namespace mozilla::widget;
using namespace mozilla::gfx;
NS_IMPL_ISUPPORTS_INHERITED(nsNativeBasicTheme, nsNativeTheme, nsITheme)
namespace {
static constexpr sRGBColor sTransparent = sRGBColor::White(0.0);
// This pushes and pops a clip rect to the draw target.
//
// This is done to reduce fuzz in places where we may have antialiasing,
// because skia is not clip-invariant: given different clips, it does not
// guarantee the same result, even if the painted content doesn't intersect
// the clips.
//
// This is a bit sad, overall, but...
struct MOZ_RAII AutoClipRect {
AutoClipRect(DrawTarget& aDt, const LayoutDeviceRect& aRect) : mDt(aDt) {
mDt.PushClipRect(aRect.ToUnknownRect());
}
~AutoClipRect() { mDt.PopClip(); }
private:
DrawTarget& mDt;
};
static LayoutDeviceIntCoord SnapBorderWidth(
CSSCoord aCssWidth, nsNativeBasicTheme::DPIRatio aDpiRatio) {
if (aCssWidth == 0.0f) {
return 0;
}
return std::max(LayoutDeviceIntCoord(1), (aCssWidth * aDpiRatio).Truncated());
}
[[nodiscard]] static float ScaleLuminanceBy(float aLuminance, float aFactor) {
return aLuminance >= 0.18f ? aLuminance * aFactor : aLuminance / aFactor;
}
struct ColorPalette {
ColorPalette(nscolor aAccent, nscolor aForeground);
constexpr ColorPalette(sRGBColor aAccent, sRGBColor aForeground,
sRGBColor aLight, sRGBColor aDark, sRGBColor aDarker)
: mAccent(aAccent),
mForeground(aForeground),
mAccentLight(aLight),
mAccentDark(aDark),
mAccentDarker(aDarker) {}
constexpr static ColorPalette Default() {
return ColorPalette(
sDefaultAccent, sDefaultAccentForeground,
sRGBColor::UnusualFromARGB(0x4d008deb), // Luminance: 25.04791%
sRGBColor::UnusualFromARGB(0xff0250bb), // Luminance: 9.33808%
sRGBColor::UnusualFromARGB(0xff054096) // Luminance: 5.90106%
);
}
// Ensure accent color is opaque by blending with white. This serves two
// purposes: On one hand, it avoids surprises if we overdraw. On the other, it
// makes our math below make more sense, as we want to match the browser
// style, which has an opaque accent color.
static nscolor EnsureOpaque(nscolor aAccent) {
if (NS_GET_A(aAccent) != 0xff) {
return NS_ComposeColors(NS_RGB(0xff, 0xff, 0xff), aAccent);
}
return aAccent;
}
static nscolor GetLight(nscolor aAccent) {
// The luminance from the light color divided by the one of the accent color
// in the default palette.
constexpr float kLightLuminanceScale = 25.048f / 13.693f;
const float lightLuminanceAdjust = ScaleLuminanceBy(
RelativeLuminanceUtils::Compute(aAccent), kLightLuminanceScale);
nscolor lightColor =
RelativeLuminanceUtils::Adjust(aAccent, lightLuminanceAdjust);
return NS_RGBA(NS_GET_R(lightColor), NS_GET_G(lightColor),
NS_GET_B(lightColor), 0x4d);
}
static nscolor GetDark(nscolor aAccent) {
// Same deal as above (but without the alpha).
constexpr float kDarkLuminanceScale = 9.338f / 13.693f;
const float darkLuminanceAdjust = ScaleLuminanceBy(
RelativeLuminanceUtils::Compute(aAccent), kDarkLuminanceScale);
return RelativeLuminanceUtils::Adjust(aAccent, darkLuminanceAdjust);
}
static nscolor GetDarker(nscolor aAccent) {
// Same deal as above.
constexpr float kDarkerLuminanceScale = 5.901f / 13.693f;
const float darkerLuminanceAdjust = ScaleLuminanceBy(
RelativeLuminanceUtils::Compute(aAccent), kDarkerLuminanceScale);
return RelativeLuminanceUtils::Adjust(aAccent, darkerLuminanceAdjust);
}
sRGBColor mAccent;
sRGBColor mForeground;
// Note that depending on the exact accent color, lighter/darker might really
// be inverted.
sRGBColor mAccentLight;
sRGBColor mAccentDark;
sRGBColor mAccentDarker;
};
static nscolor ThemedAccentColor(bool aBackground) {
MOZ_ASSERT(StaticPrefs::widget_non_native_theme_use_theme_accent());
// TODO(emilio): In the future we should probably add dark-color-scheme
// support for non-native form controls.
return ColorPalette::EnsureOpaque(LookAndFeel::Color(
aBackground ? LookAndFeel::ColorID::MozAccentColor
: LookAndFeel::ColorID::MozAccentColorForeground,
LookAndFeel::ColorScheme::Light, LookAndFeel::UseStandins::No));
}
static ColorPalette sDefaultPalette = ColorPalette::Default();
ColorPalette::ColorPalette(nscolor aAccent, nscolor aForeground) {
mAccent = sRGBColor::FromABGR(aAccent);
mForeground = sRGBColor::FromABGR(aForeground);
mAccentLight = sRGBColor::FromABGR(GetLight(aAccent));
mAccentDark = sRGBColor::FromABGR(GetDark(aAccent));
mAccentDarker = sRGBColor::FromABGR(GetDarker(aAccent));
}
} // namespace
nscolor nsNativeBasicTheme::ComputeCustomAccentForeground(nscolor aColor) {
// Contrast ratio is defined in
// https://www.w3.org/TR/WCAG20/#contrast-ratiodef as:
//
// (L1 + 0.05) / (L2 + 0.05)
//
// Where L1 is the lighter color, and L2 is the darker one. So we determine
// whether we're dark or light and resolve the equation for the target ratio.
//
// So when lightening:
//
// L1 = k * (L2 + 0.05) - 0.05
//
// And when darkening:
//
// L2 = (L1 + 0.05) / k - 0.05
//
const float luminance = RelativeLuminanceUtils::Compute(aColor);
// We generally prefer white unless we can't because the color is really light
// and we can't provide reasonable contrast.
const float ratioWithWhite = 1.05f / (luminance + 0.05f);
const bool canBeWhite =
ratioWithWhite >=
StaticPrefs::layout_css_accent_color_min_contrast_ratio();
if (canBeWhite) {
return NS_RGB(0xff, 0xff, 0xff);
}
const float targetRatio =
StaticPrefs::layout_css_accent_color_darkening_target_contrast_ratio();
const float targetLuminance = (luminance + 0.05f) / targetRatio - 0.05f;
return RelativeLuminanceUtils::Adjust(aColor, targetLuminance);
}
class nsNativeBasicTheme::AccentColor {
Maybe<nscolor> mAccentColor;
public:
AccentColor() = default;
explicit AccentColor(const ComputedStyle& aStyle) {
const auto& color = aStyle.StyleUI()->mAccentColor;
if (color.IsColor()) {
mAccentColor.emplace(
ColorPalette::EnsureOpaque(color.AsColor().CalcColor(aStyle)));
} else {
MOZ_ASSERT(color.IsAuto());
}
}
sRGBColor Get() const {
if (!mAccentColor) {
return sDefaultPalette.mAccent;
}
return sRGBColor::FromABGR(*mAccentColor);
}
sRGBColor GetForeground() const {
if (!mAccentColor) {
return sDefaultPalette.mForeground;
}
return sRGBColor::FromABGR(ComputeCustomAccentForeground(*mAccentColor));
}
sRGBColor GetLight() const {
if (!mAccentColor) {
return sDefaultPalette.mAccentLight;
}
return sRGBColor::FromABGR(ColorPalette::GetLight(*mAccentColor));
}
sRGBColor GetDark() const {
if (!mAccentColor) {
return sDefaultPalette.mAccentDark;
}
return sRGBColor::FromABGR(ColorPalette::GetDark(*mAccentColor));
}
sRGBColor GetDarker() const {
if (!mAccentColor) {
return sDefaultPalette.mAccentDarker;
}
return sRGBColor::FromABGR(ColorPalette::GetDarker(*mAccentColor));
}
};
// Widget color information associated to a particular frame.
class nsNativeBasicTheme::Colors {
const AccentColor mAccentColor;
const dom::Document& mDoc;
const bool mHighContrast;
const LookAndFeel::ColorScheme mColorScheme;
public:
explicit Colors(const nsIFrame* aFrame)
: mAccentColor(*aFrame->Style()),
mDoc(*aFrame->PresContext()->Document()),
mHighContrast(ShouldBeHighContrast(*aFrame->PresContext())),
mColorScheme(LookAndFeel::ColorSchemeForFrame(aFrame)) {}
const AccentColor& Accent() const { return mAccentColor; }
bool HighContrast() const { return mHighContrast; }
bool IsDark() const { return mColorScheme == LookAndFeel::ColorScheme::Dark; }
nscolor SystemNs(StyleSystemColor aColor) const {
return LookAndFeel::Color(aColor, mColorScheme,
LookAndFeel::ShouldUseStandins(mDoc, aColor));
}
sRGBColor System(StyleSystemColor aColor) const {
return sRGBColor::FromABGR(SystemNs(aColor));
}
template <typename Compute>
sRGBColor SystemOrElse(StyleSystemColor aColor, Compute aCompute) const {
if (auto color = LookAndFeel::GetColor(
aColor, mColorScheme,
LookAndFeel::ShouldUseStandins(mDoc, aColor))) {
return sRGBColor::FromABGR(*color);
}
return aCompute();
}
std::pair<sRGBColor, sRGBColor> SystemPair(StyleSystemColor aFirst,
StyleSystemColor aSecond) const {
return std::make_pair(System(aFirst), System(aSecond));
}
};
CSSIntCoord nsNativeBasicTheme::sHorizontalScrollbarHeight = CSSIntCoord(0);
CSSIntCoord nsNativeBasicTheme::sVerticalScrollbarWidth = CSSIntCoord(0);
static constexpr nsLiteralCString kPrefs[] = {
"widget.non-native-theme.use-theme-accent"_ns,
"widget.non-native-theme.win.scrollbar.use-system-size"_ns,
"widget.non-native-theme.scrollbar.size"_ns,
};
void nsNativeBasicTheme::Init() {
for (const auto& pref : kPrefs) {
Preferences::RegisterCallback(PrefChangedCallback, pref);
}
LookAndFeelChanged();
}
void nsNativeBasicTheme::Shutdown() {
for (const auto& pref : kPrefs) {
Preferences::UnregisterCallback(PrefChangedCallback, pref);
}
}
void nsNativeBasicTheme::LookAndFeelChanged() {
RecomputeAccentColors();
RecomputeScrollbarParams();
}
void nsNativeBasicTheme::RecomputeAccentColors() {
MOZ_RELEASE_ASSERT(NS_IsMainThread());
if (!StaticPrefs::widget_non_native_theme_use_theme_accent()) {
sDefaultPalette = ColorPalette::Default();
return;
}
sDefaultPalette =
ColorPalette(ThemedAccentColor(true), ThemedAccentColor(false));
}
void nsNativeBasicTheme::RecomputeScrollbarParams() {
uint32_t defaultSize = StaticPrefs::widget_non_native_theme_scrollbar_size();
if (StaticPrefs::widget_non_native_theme_win_scrollbar_use_system_size()) {
sHorizontalScrollbarHeight = LookAndFeel::GetInt(
LookAndFeel::IntID::SystemHorizontalScrollbarHeight, defaultSize);
sVerticalScrollbarWidth = LookAndFeel::GetInt(
LookAndFeel::IntID::SystemVerticalScrollbarWidth, defaultSize);
} else {
sHorizontalScrollbarHeight = sVerticalScrollbarWidth = defaultSize;
}
// On GTK, widgets don't account for text scale factor, but that's included
// in the usual DPI computations, so we undo that here, just like
// GetMonitorScaleFactor does it in nsNativeThemeGTK.
float scale =
LookAndFeel::GetFloat(LookAndFeel::FloatID::TextScaleFactor, 1.0f);
if (scale != 1.0f) {
sVerticalScrollbarWidth = float(sVerticalScrollbarWidth) / scale;
sHorizontalScrollbarHeight = float(sHorizontalScrollbarHeight) / scale;
}
}
static bool IsScrollbarWidthThin(nsIFrame* aFrame) {
ComputedStyle* style = nsLayoutUtils::StyleForScrollbar(aFrame);
auto scrollbarWidth = style->StyleUIReset()->mScrollbarWidth;
return scrollbarWidth == StyleScrollbarWidth::Thin;
}
/* static */
auto nsNativeBasicTheme::GetDPIRatioForScrollbarPart(nsPresContext* aPc)
-> DPIRatio {
if (auto* rootPc = aPc->GetRootPresContext()) {
if (nsCOMPtr<nsIWidget> widget = rootPc->GetRootWidget()) {
return widget->GetDefaultScale();
}
}
return DPIRatio(float(AppUnitsPerCSSPixel()) /
aPc->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom());
}
/* static */
auto nsNativeBasicTheme::GetDPIRatio(nsPresContext* aPc,
StyleAppearance aAppearance) -> DPIRatio {
// Widgets react to zoom, except scrollbars.
if (IsWidgetScrollbarPart(aAppearance)) {
return GetDPIRatioForScrollbarPart(aPc);
}
return DPIRatio(float(AppUnitsPerCSSPixel()) / aPc->AppUnitsPerDevPixel());
}
/* static */
auto nsNativeBasicTheme::GetDPIRatio(nsIFrame* aFrame,
StyleAppearance aAppearance) -> DPIRatio {
return GetDPIRatio(aFrame->PresContext(), aAppearance);
}
// Checkbox and radio need to preserve aspect-ratio for compat. We also snap the
// size to exact device pixels to avoid snapping disorting the circles.
static LayoutDeviceRect CheckBoxRadioRect(const LayoutDeviceRect& aRect) {
// Place a square rect in the center of aRect.
auto size = std::trunc(std::min(aRect.width, aRect.height));
auto position = aRect.Center() - LayoutDevicePoint(size * 0.5, size * 0.5);
return LayoutDeviceRect(position, LayoutDeviceSize(size, size));
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeCheckboxColors(
const EventStates& aState, StyleAppearance aAppearance,
const Colors& aColors) {
MOZ_ASSERT(aAppearance == StyleAppearance::Checkbox ||
aAppearance == StyleAppearance::Radio);
bool isDisabled = aState.HasState(NS_EVENT_STATE_DISABLED);
bool isChecked = aState.HasState(NS_EVENT_STATE_CHECKED);
bool isIndeterminate = aAppearance == StyleAppearance::Checkbox &&
aState.HasState(NS_EVENT_STATE_INDETERMINATE);
if (isChecked || isIndeterminate) {
if (isDisabled) {
auto color = ComputeBorderColor(aState, aColors, OutlineCoversBorder::No);
return std::make_pair(color, color);
}
bool isActive =
aState.HasAllStates(NS_EVENT_STATE_HOVER | NS_EVENT_STATE_ACTIVE);
bool isHovered = aState.HasState(NS_EVENT_STATE_HOVER);
const auto& color = isActive ? aColors.Accent().GetDarker()
: isHovered ? aColors.Accent().GetDark()
: aColors.Accent().Get();
return std::make_pair(color, color);
}
return ComputeTextfieldColors(aState, aColors, OutlineCoversBorder::No);
}
sRGBColor nsNativeBasicTheme::ComputeCheckmarkColor(const EventStates& aState,
const Colors& aColors) {
if (aColors.HighContrast()) {
return aColors.System(StyleSystemColor::Selecteditemtext);
}
if (aState.HasState(NS_EVENT_STATE_DISABLED)) {
return sRGBColor::White(.8f);
}
return aColors.Accent().GetForeground();
}
sRGBColor nsNativeBasicTheme::ComputeBorderColor(
const EventStates& aState, const Colors& aColors,
OutlineCoversBorder aOutlineCoversBorder) {
bool isDisabled = aState.HasState(NS_EVENT_STATE_DISABLED);
if (aColors.HighContrast()) {
return aColors.System(isDisabled ? StyleSystemColor::Graytext
: StyleSystemColor::Buttontext);
}
bool isActive =
aState.HasAllStates(NS_EVENT_STATE_HOVER | NS_EVENT_STATE_ACTIVE);
bool isHovered = aState.HasState(NS_EVENT_STATE_HOVER);
bool isFocused = aState.HasState(NS_EVENT_STATE_FOCUSRING);
if (isDisabled) {
return sColorGrey40Alpha50;
}
if (isFocused && aOutlineCoversBorder == OutlineCoversBorder::Yes) {
// If we draw the outline over the border, prevent issues where the border
// shows underneath if it snaps in the wrong direction by using a
// transparent border. An alternative to this is ensuring that we snap the
// offset in PaintRoundedFocusRect the same was a we snap border widths, so
// that negative offsets are guaranteed to cover the border.
// But this looks harder to mess up.
return sTransparent;
}
bool dark = aColors.IsDark();
if (isActive) {
return dark ? sColorGrey20 : sColorGrey60;
}
if (isHovered) {
return dark ? sColorGrey30 : sColorGrey50;
}
return sColorGrey40;
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeButtonColors(
const EventStates& aState, const Colors& aColors, nsIFrame* aFrame) {
bool isActive =
aState.HasAllStates(NS_EVENT_STATE_HOVER | NS_EVENT_STATE_ACTIVE);
bool isDisabled = aState.HasState(NS_EVENT_STATE_DISABLED);
bool isHovered = aState.HasState(NS_EVENT_STATE_HOVER);
const sRGBColor backgroundColor = [&] {
if (isDisabled) {
return aColors.System(StyleSystemColor::MozButtondisabledface);
}
if (isActive) {
return aColors.System(StyleSystemColor::MozButtonactiveface);
}
if (isHovered) {
return aColors.System(StyleSystemColor::MozButtonhoverface);
}
return aColors.System(StyleSystemColor::Buttonface);
}();
const sRGBColor borderColor =
ComputeBorderColor(aState, aColors, OutlineCoversBorder::Yes);
return std::make_pair(backgroundColor, borderColor);
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeTextfieldColors(
const EventStates& aState, const Colors& aColors,
OutlineCoversBorder aOutlineCoversBorder) {
nscolor backgroundColor = [&] {
if (aState.HasState(NS_EVENT_STATE_DISABLED)) {
return aColors.SystemNs(StyleSystemColor::MozDisabledfield);
}
return aColors.SystemNs(StyleSystemColor::Field);
}();
if (aState.HasState(NS_EVENT_STATE_AUTOFILL)) {
backgroundColor = NS_ComposeColors(
backgroundColor,
aColors.SystemNs(StyleSystemColor::MozAutofillBackground));
}
const sRGBColor borderColor =
ComputeBorderColor(aState, aColors, aOutlineCoversBorder);
return std::make_pair(sRGBColor::FromABGR(backgroundColor), borderColor);
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeRangeProgressColors(
const EventStates& aState, const Colors& aColors) {
if (aColors.HighContrast()) {
return aColors.SystemPair(StyleSystemColor::Selecteditem,
StyleSystemColor::Buttontext);
}
bool isActive =
aState.HasAllStates(NS_EVENT_STATE_HOVER | NS_EVENT_STATE_ACTIVE);
bool isDisabled = aState.HasState(NS_EVENT_STATE_DISABLED);
bool isHovered = aState.HasState(NS_EVENT_STATE_HOVER);
if (isDisabled) {
return std::make_pair(sColorGrey40Alpha50, sColorGrey40Alpha50);
}
if (isActive || isHovered) {
return std::make_pair(aColors.Accent().GetDark(),
aColors.Accent().GetDarker());
}
return std::make_pair(aColors.Accent().Get(), aColors.Accent().GetDark());
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeRangeTrackColors(
const EventStates& aState, const Colors& aColors) {
if (aColors.HighContrast()) {
return aColors.SystemPair(StyleSystemColor::Window,
StyleSystemColor::Buttontext);
}
bool isActive =
aState.HasAllStates(NS_EVENT_STATE_HOVER | NS_EVENT_STATE_ACTIVE);
bool isDisabled = aState.HasState(NS_EVENT_STATE_DISABLED);
bool isHovered = aState.HasState(NS_EVENT_STATE_HOVER);
if (isDisabled) {
return std::make_pair(sColorGrey10Alpha50, sColorGrey40Alpha50);
}
if (isActive || isHovered) {
return std::make_pair(sColorGrey20, sColorGrey50);
}
return std::make_pair(sColorGrey10, sColorGrey40);
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeRangeThumbColors(
const EventStates& aState, const Colors& aColors) {
if (aColors.HighContrast()) {
return aColors.SystemPair(StyleSystemColor::Selecteditemtext,
StyleSystemColor::Selecteditem);
}
bool isActive =
aState.HasAllStates(NS_EVENT_STATE_HOVER | NS_EVENT_STATE_ACTIVE);
bool isDisabled = aState.HasState(NS_EVENT_STATE_DISABLED);
bool isHovered = aState.HasState(NS_EVENT_STATE_HOVER);
const sRGBColor& backgroundColor = [&] {
if (isDisabled) {
return sColorGrey40;
}
if (isActive) {
return aColors.Accent().Get();
}
if (isHovered) {
return sColorGrey60;
}
return sColorGrey50;
}();
const sRGBColor borderColor = sRGBColor::OpaqueWhite();
return std::make_pair(backgroundColor, borderColor);
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeProgressColors(
const Colors& aColors) {
if (aColors.HighContrast()) {
return aColors.SystemPair(StyleSystemColor::Selecteditem,
StyleSystemColor::Buttontext);
}
return std::make_pair(aColors.Accent().Get(), aColors.Accent().GetDark());
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeProgressTrackColors(
const Colors& aColors) {
if (aColors.HighContrast()) {
return aColors.SystemPair(StyleSystemColor::Buttonface,
StyleSystemColor::Buttontext);
}
return std::make_pair(sColorGrey10, sColorGrey40);
}
std::pair<sRGBColor, sRGBColor> nsNativeBasicTheme::ComputeMeterchunkColors(
const EventStates& aMeterState, const Colors& aColors) {
if (aColors.HighContrast()) {
return ComputeProgressColors(aColors);
}
sRGBColor borderColor = sColorMeterGreen20;
sRGBColor chunkColor = sColorMeterGreen10;
if (aMeterState.HasState(NS_EVENT_STATE_SUB_OPTIMUM)) {
borderColor = sColorMeterYellow20;
chunkColor = sColorMeterYellow10;
} else if (aMeterState.HasState(NS_EVENT_STATE_SUB_SUB_OPTIMUM)) {
borderColor = sColorMeterRed20;
chunkColor = sColorMeterRed10;
}
return std::make_pair(chunkColor, borderColor);
}
std::array<sRGBColor, 3> nsNativeBasicTheme::ComputeFocusRectColors(
const Colors& aColors) {
if (aColors.HighContrast()) {
return {aColors.System(StyleSystemColor::Selecteditem),
aColors.System(StyleSystemColor::Buttontext),
aColors.System(StyleSystemColor::Window)};
}
const auto& accent = aColors.Accent();
const sRGBColor middle =
aColors.IsDark() ? sRGBColor::Black(.3f) : sRGBColor::White(.3f);
return {accent.Get(), middle, accent.GetLight()};
}
bool nsNativeBasicTheme::IsScrollbarTrackOpaque(nsIFrame* aFrame) {
auto trackColor = ComputeScrollbarTrackColor(
aFrame, *nsLayoutUtils::StyleForScrollbar(aFrame),
aFrame->PresContext()->Document()->GetDocumentState(), Colors(aFrame));
return trackColor.a == 1.0f;
}
sRGBColor nsNativeBasicTheme::ComputeScrollbarTrackColor(
nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aDocumentState, const Colors& aColors) {
const nsStyleUI* ui = aStyle.StyleUI();
if (aColors.HighContrast()) {
return aColors.System(StyleSystemColor::Window);
}
if (ShouldUseDarkScrollbar(aFrame, aStyle)) {
return sRGBColor::FromU8(20, 20, 25, 77);
}
if (ui->mScrollbarColor.IsColors()) {
return sRGBColor::FromABGR(
ui->mScrollbarColor.AsColors().track.CalcColor(aStyle));
}
if (aDocumentState.HasAllStates(NS_DOCUMENT_STATE_WINDOW_INACTIVE)) {
return aColors.SystemOrElse(StyleSystemColor::ThemedScrollbarInactive,
[] { return sScrollbarColor; });
}
return aColors.SystemOrElse(StyleSystemColor::ThemedScrollbar,
[] { return sScrollbarColor; });
}
nscolor nsNativeBasicTheme::AdjustUnthemedScrollbarThumbColor(
nscolor aFaceColor, EventStates aStates) {
// In Windows 10, scrollbar thumb has the following colors:
//
// State | Color | Luminance
// -------+----------+----------
// Normal | Gray 205 | 61.0%
// Hover | Gray 166 | 38.1%
// Active | Gray 96 | 11.7%
//
// This function is written based on the ratios between the values.
bool isActive = aStates.HasState(NS_EVENT_STATE_ACTIVE);
bool isHover = aStates.HasState(NS_EVENT_STATE_HOVER);
if (!isActive && !isHover) {
return aFaceColor;
}
float luminance = RelativeLuminanceUtils::Compute(aFaceColor);
if (isActive) {
// 11.7 / 61.0
luminance = ScaleLuminanceBy(luminance, 0.192f);
} else {
// 38.1 / 61.0
luminance = ScaleLuminanceBy(luminance, 0.625f);
}
return RelativeLuminanceUtils::Adjust(aFaceColor, luminance);
}
/*static*/
nscolor nsNativeBasicTheme::GetScrollbarButtonColor(nscolor aTrackColor,
EventStates aStates) {
// See numbers in GetScrollbarArrowColor.
// This function is written based on ratios between values listed there.
bool isActive = aStates.HasState(NS_EVENT_STATE_ACTIVE);
bool isHover = aStates.HasState(NS_EVENT_STATE_HOVER);
if (!isActive && !isHover) {
return aTrackColor;
}
float luminance = RelativeLuminanceUtils::Compute(aTrackColor);
if (isActive) {
if (luminance >= 0.18f) {
luminance *= 0.134f;
} else {
luminance /= 0.134f;
luminance = std::min(luminance, 1.0f);
}
} else {
if (luminance >= 0.18f) {
luminance *= 0.805f;
} else {
luminance /= 0.805f;
}
}
return RelativeLuminanceUtils::Adjust(aTrackColor, luminance);
}
/*static*/
Maybe<nscolor> nsNativeBasicTheme::GetScrollbarArrowColor(
nscolor aButtonColor) {
// In Windows 10 scrollbar, there are several gray colors used:
//
// State | Background (lum) | Arrow | Contrast
// -------+------------------+---------+---------
// Normal | Gray 240 (87.1%) | Gray 96 | 5.5
// Hover | Gray 218 (70.1%) | Black | 15.0
// Active | Gray 96 (11.7%) | White | 6.3
//
// Contrast value is computed based on the definition in
// https://www.w3.org/TR/WCAG20/#contrast-ratiodef
//
// This function is written based on these values.
if (NS_GET_A(aButtonColor) == 0) {
// If the button color is transparent, because of e.g.
// scrollbar-color: <something> transparent, then use
// the thumb color, which is expected to have enough
// contrast.
return Nothing();
}
float luminance = RelativeLuminanceUtils::Compute(aButtonColor);
// Color with luminance larger than 0.72 has contrast ratio over 4.6
// to color with luminance of gray 96, so this value is chosen for
// this range. It is the luminance of gray 221.
if (luminance >= 0.72) {
// ComputeRelativeLuminanceFromComponents(96). That function cannot
// be constexpr because of std::pow.
const float GRAY96_LUMINANCE = 0.117f;
return Some(RelativeLuminanceUtils::Adjust(aButtonColor, GRAY96_LUMINANCE));
}
// The contrast ratio of a color to black equals that to white when its
// luminance is around 0.18, with a contrast ratio ~4.6 to both sides,
// thus the value below. It's the lumanince of gray 118.
//
// TODO(emilio): Maybe the button alpha is not the best thing to use here and
// we should use the thumb alpha? It seems weird that the color of the arrow
// depends on the opacity of the scrollbar thumb...
if (luminance >= 0.18) {
return Some(NS_RGBA(0, 0, 0, NS_GET_A(aButtonColor)));
}
return Some(NS_RGBA(255, 255, 255, NS_GET_A(aButtonColor)));
}
bool nsNativeBasicTheme::ShouldUseDarkScrollbar(nsIFrame* aFrame,
const ComputedStyle& aStyle) {
if (StaticPrefs::widget_disable_dark_scrollbar()) {
return false;
}
if (aStyle.StyleUI()->mScrollbarColor.IsColors()) {
return false;
}
return nsNativeTheme::IsDarkBackground(aFrame);
}
// Don't use the theme color for dark scrollbars if it's not a color (if it's
// grey-ish), as that'd either lack enough contrast, or be close to what we'd do
// by default anyways.
static bool ShouldUseColorForActiveDarkScrollbarThumb(nscolor aColor) {
auto IsDifferentEnough = [](int32_t aChannel, int32_t aOtherChannel) {
return std::abs(aChannel - aOtherChannel) > 10;
};
return IsDifferentEnough(NS_GET_R(aColor), NS_GET_G(aColor)) ||
IsDifferentEnough(NS_GET_R(aColor), NS_GET_B(aColor));
}
sRGBColor nsNativeBasicTheme::ComputeScrollbarThumbColor(
nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors) {
if (!aColors.HighContrast() && ShouldUseDarkScrollbar(aFrame, aStyle)) {
if (aElementState.HasState(NS_EVENT_STATE_ACTIVE) &&
StaticPrefs::widget_non_native_theme_scrollbar_active_always_themed()) {
auto color = LookAndFeel::GetColor(
StyleSystemColor::ThemedScrollbarThumbActive,
LookAndFeel::ColorScheme::Light, LookAndFeel::UseStandins::No);
if (color && ShouldUseColorForActiveDarkScrollbarThumb(*color)) {
return sRGBColor::FromABGR(*color);
}
}
return sRGBColor::FromABGR(AdjustUnthemedScrollbarThumbColor(
NS_RGBA(249, 249, 250, 102), aElementState));
}
const nsStyleUI* ui = aStyle.StyleUI();
if (ui->mScrollbarColor.IsColors()) {
return sRGBColor::FromABGR(AdjustUnthemedScrollbarThumbColor(
ui->mScrollbarColor.AsColors().thumb.CalcColor(aStyle), aElementState));
}
auto systemColor = [&] {
if (aDocumentState.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE)) {
return StyleSystemColor::ThemedScrollbarThumbInactive;
}
if (aElementState.HasState(NS_EVENT_STATE_ACTIVE)) {
if (aColors.HighContrast()) {
return StyleSystemColor::Selecteditem;
}
return StyleSystemColor::ThemedScrollbarThumbActive;
}
if (aElementState.HasState(NS_EVENT_STATE_HOVER)) {
if (aColors.HighContrast()) {
return StyleSystemColor::Selecteditem;
}
return StyleSystemColor::ThemedScrollbarThumbHover;
}
if (aColors.HighContrast()) {
return StyleSystemColor::Windowtext;
}
return StyleSystemColor::ThemedScrollbarThumb;
}();
return aColors.SystemOrElse(systemColor, [&] {
return sRGBColor::FromABGR(AdjustUnthemedScrollbarThumbColor(
sScrollbarThumbColor.ToABGR(), aElementState));
});
}
std::pair<sRGBColor, sRGBColor>
nsNativeBasicTheme::ComputeScrollbarButtonColors(
nsIFrame* aFrame, StyleAppearance aAppearance, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors) {
if (aColors.HighContrast()) {
if (aElementState.HasAtLeastOneOfStates(NS_EVENT_STATE_ACTIVE |
NS_EVENT_STATE_HOVER)) {
return aColors.SystemPair(StyleSystemColor::Selecteditem,
StyleSystemColor::Buttonface);
}
return aColors.SystemPair(StyleSystemColor::Window,
StyleSystemColor::Windowtext);
}
auto trackColor =
ComputeScrollbarTrackColor(aFrame, aStyle, aDocumentState, aColors);
nscolor buttonColor =
GetScrollbarButtonColor(trackColor.ToABGR(), aElementState);
auto arrowColor =
GetScrollbarArrowColor(buttonColor)
.map(sRGBColor::FromABGR)
.valueOrFrom([&] {
return ComputeScrollbarThumbColor(aFrame, aStyle, aElementState,
aDocumentState, aColors);
});
return {sRGBColor::FromABGR(buttonColor), arrowColor};
}
static const CSSCoord kInnerFocusOutlineWidth = 2.0f;
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintRoundedFocusRect(PaintBackendData& aBackendData,
const LayoutDeviceRect& aRect,
const Colors& aColors,
DPIRatio aDpiRatio,
CSSCoord aRadius,
CSSCoord aOffset) {
// NOTE(emilio): If the widths or offsets here change, make sure to tweak
// the GetWidgetOverflow path for FocusOutline.
auto [innerColor, middleColor, outerColor] = ComputeFocusRectColors(aColors);
LayoutDeviceRect focusRect(aRect);
// The focus rect is painted outside of the border area (aRect), see:
//
// data:text/html,<div style="border: 1px solid; outline: 2px solid
// red">Foobar</div>
//
// But some controls might provide a negative offset to cover the border, if
// necessary.
CSSCoord strokeWidth = kInnerFocusOutlineWidth;
auto strokeWidthDevPx =
LayoutDeviceCoord(SnapBorderWidth(strokeWidth, aDpiRatio));
CSSCoord strokeRadius = aRadius;
focusRect.Inflate(aOffset * aDpiRatio + strokeWidthDevPx);
PaintRoundedRectWithRadius(aBackendData, focusRect, sTransparent, innerColor,
strokeWidth, strokeRadius, aDpiRatio);
strokeWidth = CSSCoord(1.0f);
strokeWidthDevPx = LayoutDeviceCoord(SnapBorderWidth(strokeWidth, aDpiRatio));
strokeRadius += strokeWidth;
focusRect.Inflate(strokeWidthDevPx);
PaintRoundedRectWithRadius(aBackendData, focusRect, sTransparent, middleColor,
strokeWidth, strokeRadius, aDpiRatio);
strokeWidth = CSSCoord(2.0f);
strokeWidthDevPx = LayoutDeviceCoord(SnapBorderWidth(strokeWidth, aDpiRatio));
strokeRadius += strokeWidth;
focusRect.Inflate(strokeWidthDevPx);
PaintRoundedRectWithRadius(aBackendData, focusRect, sTransparent, outerColor,
strokeWidth, strokeRadius, aDpiRatio);
}
void nsNativeBasicTheme::PaintRoundedRectWithRadius(
WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
const LayoutDeviceRect& aClipRect, const sRGBColor& aBackgroundColor,
const sRGBColor& aBorderColor, CSSCoord aBorderWidth, CSSCoord aRadius,
DPIRatio aDpiRatio) {
const bool kBackfaceIsVisible = true;
const LayoutDeviceCoord borderWidth(SnapBorderWidth(aBorderWidth, aDpiRatio));
const LayoutDeviceCoord radius(aRadius * aDpiRatio);
const wr::LayoutRect dest = wr::ToLayoutRect(aRect);
const wr::LayoutRect clip = wr::ToLayoutRect(aClipRect);
// Push the background.
if (aBackgroundColor.a) {
auto backgroundColor = wr::ToColorF(ToDeviceColor(aBackgroundColor));
wr::LayoutRect backgroundRect = [&] {
LayoutDeviceRect bg = aRect;
bg.Deflate(borderWidth);
return wr::ToLayoutRect(bg);
}();
if (!radius) {
aWrData.mBuilder.PushRect(backgroundRect, clip, kBackfaceIsVisible,
backgroundColor);
} else {
// NOTE(emilio): This follows DisplayListBuilder::PushRoundedRect and
// draws the rounded fill as an extra thick rounded border instead of a
// rectangle that's clipped to a rounded clip. Refer to that method for a
// justification. See bug 1694269.
LayoutDeviceCoord backgroundRadius =
std::max(0.0f, float(radius) - float(borderWidth));
wr::BorderSide side = {backgroundColor, wr::BorderStyle::Solid};
const wr::BorderSide sides[4] = {side, side, side, side};
float h = backgroundRect.width() * 0.6f;
float v = backgroundRect.height() * 0.6f;
wr::LayoutSideOffsets widths = {v, h, v, h};
wr::BorderRadius radii = {{backgroundRadius, backgroundRadius},
{backgroundRadius, backgroundRadius},
{backgroundRadius, backgroundRadius},
{backgroundRadius, backgroundRadius}};
aWrData.mBuilder.PushBorder(backgroundRect, clip, kBackfaceIsVisible,
widths, {sides, 4}, radii);
}
}
if (borderWidth && aBorderColor.a) {
// Push the border.
const auto borderColor = ToDeviceColor(aBorderColor);
const auto side = wr::ToBorderSide(borderColor, StyleBorderStyle::Solid);
const wr::BorderSide sides[4] = {side, side, side, side};
const LayoutDeviceSize sideRadius(radius, radius);
const auto widths =
wr::ToBorderWidths(borderWidth, borderWidth, borderWidth, borderWidth);
const auto wrRadius =
wr::ToBorderRadius(sideRadius, sideRadius, sideRadius, sideRadius);
aWrData.mBuilder.PushBorder(dest, clip, kBackfaceIsVisible, widths,
{sides, 4}, wrRadius);
}
}
void nsNativeBasicTheme::FillRect(DrawTarget& aDt,
const LayoutDeviceRect& aRect,
const sRGBColor& aColor) {
aDt.FillRect(aRect.ToUnknownRect(), ColorPattern(ToDeviceColor(aColor)));
}
void nsNativeBasicTheme::FillRect(WebRenderBackendData& aWrData,
const LayoutDeviceRect& aRect,
const sRGBColor& aColor) {
const bool kBackfaceIsVisible = true;
auto dest = wr::ToLayoutRect(aRect);
aWrData.mBuilder.PushRect(dest, dest, kBackfaceIsVisible,
wr::ToColorF(ToDeviceColor(aColor)));
}
void nsNativeBasicTheme::PaintRoundedRectWithRadius(
DrawTarget& aDrawTarget, const LayoutDeviceRect& aRect,
const LayoutDeviceRect& aClipRect, const sRGBColor& aBackgroundColor,
const sRGBColor& aBorderColor, CSSCoord aBorderWidth, CSSCoord aRadius,
DPIRatio aDpiRatio) {
const LayoutDeviceCoord borderWidth(SnapBorderWidth(aBorderWidth, aDpiRatio));
const bool needsClip = !(aRect == aClipRect);
if (needsClip) {
aDrawTarget.PushClipRect(aClipRect.ToUnknownRect());
}
LayoutDeviceRect rect(aRect);
// Deflate the rect by half the border width, so that the middle of the
// stroke fills exactly the area we want to fill and not more.
rect.Deflate(borderWidth * 0.5f);
LayoutDeviceCoord radius(aRadius * aDpiRatio - borderWidth * 0.5f);
// Fix up the radius if it's too large with the rect we're going to paint.
{
LayoutDeviceCoord min = std::min(rect.width, rect.height);
if (radius * 2.0f > min) {
radius = min * 0.5f;
}
}
Maybe<ColorPattern> backgroundPattern;
if (aBackgroundColor.a) {
backgroundPattern.emplace(ToDeviceColor(aBackgroundColor));
}
Maybe<ColorPattern> borderPattern;
if (borderWidth && aBorderColor.a) {
borderPattern.emplace(ToDeviceColor(aBorderColor));
}
if (borderPattern || backgroundPattern) {
if (radius) {
RectCornerRadii radii(radius, radius, radius, radius);
RefPtr<Path> roundedRect =
MakePathForRoundedRect(aDrawTarget, rect.ToUnknownRect(), radii);
if (backgroundPattern) {
aDrawTarget.Fill(roundedRect, *backgroundPattern);
}
if (borderPattern) {
aDrawTarget.Stroke(roundedRect, *borderPattern,
StrokeOptions(borderWidth));
}
} else {
if (backgroundPattern) {
aDrawTarget.FillRect(rect.ToUnknownRect(), *backgroundPattern);
}
if (borderPattern) {
aDrawTarget.StrokeRect(rect.ToUnknownRect(), *borderPattern,
StrokeOptions(borderWidth));
}
}
}
if (needsClip) {
aDrawTarget.PopClip();
}
}
void nsNativeBasicTheme::PaintCheckboxControl(DrawTarget& aDrawTarget,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio) {
auto [backgroundColor, borderColor] =
ComputeCheckboxColors(aState, StyleAppearance::Checkbox, aColors);
{
const CSSCoord radius = 2.0f;
CSSCoord borderWidth = kCheckboxRadioBorderWidth;
if (backgroundColor == borderColor) {
borderWidth = 0.0f;
}
PaintRoundedRectWithRadius(aDrawTarget, aRect, backgroundColor, borderColor,
borderWidth, radius, aDpiRatio);
}
if (aState.HasState(NS_EVENT_STATE_INDETERMINATE)) {
PaintIndeterminateMark(aDrawTarget, aRect, aState, aColors);
} else if (aState.HasState(NS_EVENT_STATE_CHECKED)) {
PaintCheckMark(aDrawTarget, aRect, aState, aColors);
}
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aDrawTarget, aRect, aColors, aDpiRatio, 5.0f, 1.0f);
}
}
constexpr CSSCoord kCheckboxRadioContentBoxSize = 10.0f;
constexpr CSSCoord kCheckboxRadioBorderBoxSize =
kCheckboxRadioContentBoxSize + kCheckboxRadioBorderWidth * 2.0f;
// Returns the right scale for points in a aSize x aSize sized box, centered at
// 0x0 to fill aRect in the smaller dimension.
static float ScaleToFillRect(const LayoutDeviceRect& aRect, const float aSize) {
return std::min(aRect.width, aRect.height) / aSize;
}
void nsNativeBasicTheme::PaintCheckMark(DrawTarget& aDrawTarget,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors) {
// Points come from the coordinates on a 14X14 (kCheckboxRadioBorderBoxSize)
// unit box centered at 0,0
const float checkPolygonX[] = {-4.5f, -1.5f, -0.5f, 5.0f, 4.75f,
3.5f, -0.5f, -1.5f, -3.5f};
const float checkPolygonY[] = {0.5f, 4.0f, 4.0f, -2.5f, -4.0f,
-4.0f, 1.0f, 1.25f, -1.0f};
const int32_t checkNumPoints = sizeof(checkPolygonX) / sizeof(float);
const float scale = ScaleToFillRect(aRect, kCheckboxRadioBorderBoxSize);
auto center = aRect.Center().ToUnknownPoint();
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder();
Point p = center + Point(checkPolygonX[0] * scale, checkPolygonY[0] * scale);
builder->MoveTo(p);
for (int32_t i = 1; i < checkNumPoints; i++) {
p = center + Point(checkPolygonX[i] * scale, checkPolygonY[i] * scale);
builder->LineTo(p);
}
RefPtr<Path> path = builder->Finish();
sRGBColor fillColor = ComputeCheckmarkColor(aState, aColors);
aDrawTarget.Fill(path, ColorPattern(ToDeviceColor(fillColor)));
}
void nsNativeBasicTheme::PaintIndeterminateMark(DrawTarget& aDrawTarget,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors) {
const CSSCoord borderWidth = 2.0f;
const float scale = ScaleToFillRect(aRect, kCheckboxRadioBorderBoxSize);
Rect rect = aRect.ToUnknownRect();
rect.y += (rect.height / 2) - (borderWidth * scale / 2);
rect.height = borderWidth * scale;
rect.x += (borderWidth * scale) + (borderWidth * scale / 8);
rect.width -= ((borderWidth * scale) + (borderWidth * scale / 8)) * 2;
sRGBColor fillColor = ComputeCheckmarkColor(aState, aColors);
aDrawTarget.FillRect(rect, ColorPattern(ToDeviceColor(fillColor)));
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintStrokedCircle(PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const sRGBColor& aBackgroundColor,
const sRGBColor& aBorderColor,
const CSSCoord aBorderWidth,
DPIRatio aDpiRatio) {
auto radius = LayoutDeviceCoord(aRect.Size().width) / aDpiRatio;
PaintRoundedRectWithRadius(aPaintData, aRect, aBackgroundColor, aBorderColor,
aBorderWidth, radius, aDpiRatio);
}
void nsNativeBasicTheme::PaintCircleShadow(WebRenderBackendData& aWrData,
const LayoutDeviceRect& aBoxRect,
const LayoutDeviceRect& aClipRect,
float aShadowAlpha,
const CSSPoint& aShadowOffset,
CSSCoord aShadowBlurStdDev,
DPIRatio aDpiRatio) {
const bool kBackfaceIsVisible = true;
const LayoutDeviceCoord stdDev = aShadowBlurStdDev * aDpiRatio;
const LayoutDevicePoint shadowOffset = aShadowOffset * aDpiRatio;
const IntSize inflation =
gfxAlphaBoxBlur::CalculateBlurRadius(gfxPoint(stdDev, stdDev));
LayoutDeviceRect shadowRect = aBoxRect;
shadowRect.MoveBy(shadowOffset);
shadowRect.Inflate(inflation.width, inflation.height);
const auto boxRect = wr::ToLayoutRect(aBoxRect);
aWrData.mBuilder.PushBoxShadow(
wr::ToLayoutRect(shadowRect), wr::ToLayoutRect(aClipRect),
kBackfaceIsVisible, boxRect,
wr::ToLayoutVector2D(aShadowOffset * aDpiRatio),
wr::ToColorF(DeviceColor(0.0f, 0.0f, 0.0f, aShadowAlpha)), stdDev,
/* aSpread = */ 0.0f,
wr::ToBorderRadius(gfx::RectCornerRadii(aBoxRect.Size().width)),
wr::BoxShadowClipMode::Outset);
}
void nsNativeBasicTheme::PaintCircleShadow(DrawTarget& aDrawTarget,
const LayoutDeviceRect& aBoxRect,
const LayoutDeviceRect& aClipRect,
float aShadowAlpha,
const CSSPoint& aShadowOffset,
CSSCoord aShadowBlurStdDev,
DPIRatio aDpiRatio) {
Float stdDev = aShadowBlurStdDev * aDpiRatio;
Point offset = (aShadowOffset * aDpiRatio).ToUnknownPoint();
RefPtr<FilterNode> blurFilter =
aDrawTarget.CreateFilter(FilterType::GAUSSIAN_BLUR);
if (!blurFilter) {
return;
}
blurFilter->SetAttribute(ATT_GAUSSIAN_BLUR_STD_DEVIATION, stdDev);
IntSize inflation =
gfxAlphaBoxBlur::CalculateBlurRadius(gfxPoint(stdDev, stdDev));
Rect inflatedRect = aBoxRect.ToUnknownRect();
inflatedRect.Inflate(inflation.width, inflation.height);
Rect sourceRectInFilterSpace =
inflatedRect - aBoxRect.TopLeft().ToUnknownPoint();
Point destinationPointOfSourceRect = inflatedRect.TopLeft() + offset;
IntSize dtSize = RoundedToInt(aBoxRect.Size().ToUnknownSize());
RefPtr<DrawTarget> ellipseDT = aDrawTarget.CreateSimilarDrawTargetForFilter(
dtSize, SurfaceFormat::A8, blurFilter, blurFilter,
sourceRectInFilterSpace, destinationPointOfSourceRect);
if (!ellipseDT) {
return;
}
AutoClipRect clipRect(aDrawTarget, aClipRect);
RefPtr<Path> ellipse = MakePathForEllipse(
*ellipseDT, (aBoxRect - aBoxRect.TopLeft()).Center().ToUnknownPoint(),
aBoxRect.Size().ToUnknownSize());
ellipseDT->Fill(ellipse,
ColorPattern(DeviceColor(0.0f, 0.0f, 0.0f, aShadowAlpha)));
RefPtr<SourceSurface> ellipseSurface = ellipseDT->Snapshot();
blurFilter->SetInput(IN_GAUSSIAN_BLUR_IN, ellipseSurface);
aDrawTarget.DrawFilter(blurFilter, sourceRectInFilterSpace,
destinationPointOfSourceRect);
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintRadioControl(PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio) {
auto [backgroundColor, borderColor] =
ComputeCheckboxColors(aState, StyleAppearance::Radio, aColors);
{
CSSCoord borderWidth = kCheckboxRadioBorderWidth;
if (backgroundColor == borderColor) {
borderWidth = 0.0f;
}
PaintStrokedCircle(aPaintData, aRect, backgroundColor, borderColor,
borderWidth, aDpiRatio);
}
if (aState.HasState(NS_EVENT_STATE_CHECKED)) {
LayoutDeviceRect rect(aRect);
rect.Deflate(SnapBorderWidth(kCheckboxRadioBorderWidth, aDpiRatio));
auto checkColor = ComputeCheckmarkColor(aState, aColors);
PaintStrokedCircle(aPaintData, rect, backgroundColor, checkColor,
kCheckboxRadioBorderWidth, aDpiRatio);
}
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aPaintData, aRect, aColors, aDpiRatio, 5.0f, 1.0f);
}
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintTextField(PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio) {
auto [backgroundColor, borderColor] =
ComputeTextfieldColors(aState, aColors, OutlineCoversBorder::Yes);
const CSSCoord radius = 2.0f;
PaintRoundedRectWithRadius(aPaintData, aRect, backgroundColor, borderColor,
kTextFieldBorderWidth, radius, aDpiRatio);
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aPaintData, aRect, aColors, aDpiRatio,
radius + kTextFieldBorderWidth,
-kTextFieldBorderWidth);
}
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintListbox(PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio) {
const CSSCoord radius = 2.0f;
auto [backgroundColor, borderColor] =
ComputeTextfieldColors(aState, aColors, OutlineCoversBorder::Yes);
PaintRoundedRectWithRadius(aPaintData, aRect, backgroundColor, borderColor,
kMenulistBorderWidth, radius, aDpiRatio);
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aPaintData, aRect, aColors, aDpiRatio,
radius + kMenulistBorderWidth, -kMenulistBorderWidth);
}
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintMenulist(PaintBackendData& aDrawTarget,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio) {
const CSSCoord radius = 4.0f;
auto [backgroundColor, borderColor] = ComputeButtonColors(aState, aColors);
PaintRoundedRectWithRadius(aDrawTarget, aRect, backgroundColor, borderColor,
kMenulistBorderWidth, radius, aDpiRatio);
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aDrawTarget, aRect, aColors, aDpiRatio,
radius + kMenulistBorderWidth, -kMenulistBorderWidth);
}
}
void nsNativeBasicTheme::PaintArrow(DrawTarget& aDrawTarget,
const LayoutDeviceRect& aRect,
const float aArrowPolygonX[],
const float aArrowPolygonY[],
const float aArrowPolygonSize,
const int32_t aArrowNumPoints,
const sRGBColor aFillColor) {
const float scale = ScaleToFillRect(aRect, aArrowPolygonSize);
auto center = aRect.Center().ToUnknownPoint();
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder();
Point p =
center + Point(aArrowPolygonX[0] * scale, aArrowPolygonY[0] * scale);
builder->MoveTo(p);
for (int32_t i = 1; i < aArrowNumPoints; i++) {
p = center + Point(aArrowPolygonX[i] * scale, aArrowPolygonY[i] * scale);
builder->LineTo(p);
}
RefPtr<Path> path = builder->Finish();
aDrawTarget.Fill(path, ColorPattern(ToDeviceColor(aFillColor)));
}
void nsNativeBasicTheme::PaintMenulistArrowButton(nsIFrame* aFrame,
DrawTarget& aDrawTarget,
const LayoutDeviceRect& aRect,
const EventStates& aState) {
const float kPolygonX[] = {-4.0f, -0.5f, 0.5f, 4.0f, 4.0f,
3.0f, 0.0f, 0.0f, -3.0f, -4.0f};
const float kPolygonY[] = {-1, 3.0f, 3.0f, -1.0f, -2.0f,
-2.0f, 1.5f, 1.5f, -2.0f, -2.0f};
const float kPolygonSize = kMinimumDropdownArrowButtonWidth;
const auto arrowColor = sRGBColor::FromABGR(
nsLayoutUtils::GetColor(aFrame, &nsStyleText::mWebkitTextFillColor));
PaintArrow(aDrawTarget, aRect, kPolygonX, kPolygonY, kPolygonSize,
ArrayLength(kPolygonX), arrowColor);
}
void nsNativeBasicTheme::PaintSpinnerButton(
nsIFrame* aFrame, DrawTarget& aDrawTarget, const LayoutDeviceRect& aRect,
const EventStates& aState, StyleAppearance aAppearance,
const Colors& aColors, DPIRatio aDpiRatio) {
auto [backgroundColor, borderColor] = ComputeButtonColors(aState, aColors);
aDrawTarget.FillRect(aRect.ToUnknownRect(),
ColorPattern(ToDeviceColor(backgroundColor)));
const float kPolygonX[] = {-3.5f, -0.5f, 0.5f, 3.5f, 3.5f,
2.5f, 0.0f, 0.0f, -2.5f, -3.5f};
float polygonY[] = {-1.5f, 1.5f, 1.5f, -1.5f, -2.5f,
-2.5f, 0.0f, 0.0f, -2.5f, -2.5f};
const float kPolygonSize = kMinimumSpinnerButtonHeight;
if (aAppearance == StyleAppearance::SpinnerUpbutton) {
for (auto& coord : polygonY) {
coord = -coord;
}
}
PaintArrow(aDrawTarget, aRect, kPolygonX, polygonY, kPolygonSize,
ArrayLength(kPolygonX), borderColor);
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintRange(nsIFrame* aFrame,
PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors, DPIRatio aDpiRatio,
bool aHorizontal) {
nsRangeFrame* rangeFrame = do_QueryFrame(aFrame);
if (!rangeFrame) {
return;
}
double progress = rangeFrame->GetValueAsFractionOfRange();
auto rect = aRect;
LayoutDeviceRect thumbRect(0, 0, kMinimumRangeThumbSize * aDpiRatio,
kMinimumRangeThumbSize * aDpiRatio);
LayoutDeviceRect progressClipRect(aRect);
LayoutDeviceRect trackClipRect(aRect);
const LayoutDeviceCoord verticalSize = kRangeHeight * aDpiRatio;
if (aHorizontal) {
rect.height = verticalSize;
rect.y = aRect.y + (aRect.height - rect.height) / 2;
thumbRect.y = aRect.y + (aRect.height - thumbRect.height) / 2;
if (IsFrameRTL(aFrame)) {
thumbRect.x =
aRect.x + (aRect.width - thumbRect.width) * (1.0 - progress);
float midPoint = thumbRect.Center().X();
trackClipRect.SetBoxX(aRect.X(), midPoint);
progressClipRect.SetBoxX(midPoint, aRect.XMost());
} else {
thumbRect.x = aRect.x + (aRect.width - thumbRect.width) * progress;
float midPoint = thumbRect.Center().X();
progressClipRect.SetBoxX(aRect.X(), midPoint);
trackClipRect.SetBoxX(midPoint, aRect.XMost());
}
} else {
rect.width = verticalSize;
rect.x = aRect.x + (aRect.width - rect.width) / 2;
thumbRect.x = aRect.x + (aRect.width - thumbRect.width) / 2;
thumbRect.y =
aRect.y + (aRect.height - thumbRect.height) * (1.0 - progress);
float midPoint = thumbRect.Center().Y();
trackClipRect.SetBoxY(aRect.Y(), midPoint);
progressClipRect.SetBoxY(midPoint, aRect.YMost());
}
const CSSCoord borderWidth = 1.0f;
const CSSCoord radius = 3.0f;
auto [progressColor, progressBorderColor] =
ComputeRangeProgressColors(aState, aColors);
auto [trackColor, trackBorderColor] =
ComputeRangeTrackColors(aState, aColors);
PaintRoundedRectWithRadius(aPaintData, rect, progressClipRect, progressColor,
progressBorderColor, borderWidth, radius,
aDpiRatio);
PaintRoundedRectWithRadius(aPaintData, rect, trackClipRect, trackColor,
trackBorderColor, borderWidth, radius, aDpiRatio);
if (!aState.HasState(NS_EVENT_STATE_DISABLED)) {
// Ensure the shadow doesn't expand outside of our overflow rect declared in
// GetWidgetOverflow().
auto overflowRect = aRect;
overflowRect.Inflate(CSSCoord(6.0f) * aDpiRatio);
// Thumb shadow
PaintCircleShadow(aPaintData, thumbRect, overflowRect, 0.3f,
CSSPoint(0.0f, 2.0f), 2.0f, aDpiRatio);
}
// Draw the thumb on top.
const CSSCoord thumbBorderWidth = 2.0f;
auto [thumbColor, thumbBorderColor] =
ComputeRangeThumbColors(aState, aColors);
PaintStrokedCircle(aPaintData, thumbRect, thumbColor, thumbBorderColor,
thumbBorderWidth, aDpiRatio);
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aPaintData, aRect, aColors, aDpiRatio, radius, 1.0f);
}
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintProgress(nsIFrame* aFrame,
PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio, bool aIsMeter) {
const CSSCoord borderWidth = 1.0f;
const CSSCoord radius = aIsMeter ? 6.0f : 3.0f;
LayoutDeviceRect rect(aRect);
const LayoutDeviceCoord thickness =
(aIsMeter ? kMeterHeight : kProgressbarHeight) * aDpiRatio;
const bool isHorizontal = !nsNativeTheme::IsVerticalProgress(aFrame);
if (isHorizontal) {
// Center it vertically.
rect.y += (rect.height - thickness) / 2;
rect.height = thickness;
} else {
// Center it horizontally.
rect.x += (rect.width - thickness) / 2;
rect.width = thickness;
}
{
// Paint the track, unclipped.
auto [backgroundColor, borderColor] = ComputeProgressTrackColors(aColors);
PaintRoundedRectWithRadius(aPaintData, rect, rect, backgroundColor,
borderColor, borderWidth, radius, aDpiRatio);
}
// Now paint the chunk, clipped as needed.
LayoutDeviceRect clipRect = rect;
if (aState.HasState(NS_EVENT_STATE_INDETERMINATE)) {
// For indeterminate progress, we paint an animated chunk of 1/3 of the
// progress size.
//
// Animation speed and math borrowed from GTK.
const LayoutDeviceCoord size = isHorizontal ? rect.width : rect.height;
const LayoutDeviceCoord barSize = size * 0.3333f;
const LayoutDeviceCoord travel = 2.0f * (size - barSize);
// Period equals to travel / pixelsPerMillisecond where pixelsPerMillisecond
// equals progressSize / 1000.0. This is equivalent to 1600.
const unsigned kPeriod = 1600;
const int t = PR_IntervalToMilliseconds(PR_IntervalNow()) % kPeriod;
const LayoutDeviceCoord dx = travel * float(t) / float(kPeriod);
if (isHorizontal) {
rect.width = barSize;
rect.x += (dx < travel * .5f) ? dx : travel - dx;
} else {
rect.height = barSize;
rect.y += (dx < travel * .5f) ? dx : travel - dx;
}
clipRect = rect;
// Queue the next frame if needed.
if (!QueueAnimatedContentForRefresh(aFrame->GetContent(), 60)) {
NS_WARNING("Couldn't refresh indeterminate <progress>");
}
} else {
// This is the progress chunk, clip it to the right amount.
double position = [&] {
if (aIsMeter) {
auto* meter = dom::HTMLMeterElement::FromNode(aFrame->GetContent());
if (!meter) {
return 0.0;
}
return meter->Value() / meter->Max();
}
auto* progress = dom::HTMLProgressElement::FromNode(aFrame->GetContent());
if (!progress) {
return 0.0;
}
return progress->Value() / progress->Max();
}();
if (isHorizontal) {
double clipWidth = rect.width * position;
clipRect.width = clipWidth;
if (IsFrameRTL(aFrame)) {
clipRect.x += rect.width - clipWidth;
}
} else {
double clipHeight = rect.height * position;
clipRect.height = clipHeight;
clipRect.y += rect.height - clipHeight;
}
}
auto [backgroundColor, borderColor] =
aIsMeter ? ComputeMeterchunkColors(aState, aColors)
: ComputeProgressColors(aColors);
PaintRoundedRectWithRadius(aPaintData, rect, clipRect, backgroundColor,
borderColor, borderWidth, radius, aDpiRatio);
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintButton(nsIFrame* aFrame,
PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const EventStates& aState,
const Colors& aColors,
DPIRatio aDpiRatio) {
const CSSCoord radius = 4.0f;
auto [backgroundColor, borderColor] =
ComputeButtonColors(aState, aColors, aFrame);
PaintRoundedRectWithRadius(aPaintData, aRect, backgroundColor, borderColor,
kButtonBorderWidth, radius, aDpiRatio);
if (aState.HasState(NS_EVENT_STATE_FOCUSRING)) {
PaintRoundedFocusRect(aPaintData, aRect, aColors, aDpiRatio,
radius + kButtonBorderWidth, -kButtonBorderWidth);
}
}
template <typename PaintBackendData>
bool nsNativeBasicTheme::DoPaintDefaultScrollbarThumb(
PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
bool aHorizontal, nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
sRGBColor thumbColor = ComputeScrollbarThumbColor(
aFrame, aStyle, aElementState, aDocumentState, aColors);
FillRect(aPaintData, aRect, thumbColor);
return true;
}
bool nsNativeBasicTheme::PaintScrollbarThumb(
DrawTarget& aDrawTarget, const LayoutDeviceRect& aRect, bool aHorizontal,
nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
return DoPaintDefaultScrollbarThumb(aDrawTarget, aRect, aHorizontal, aFrame,
aStyle, aElementState, aDocumentState,
aColors, aDpiRatio);
}
bool nsNativeBasicTheme::PaintScrollbarThumb(
WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
bool aHorizontal, nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
return DoPaintDefaultScrollbarThumb(aWrData, aRect, aHorizontal, aFrame,
aStyle, aElementState, aDocumentState,
aColors, aDpiRatio);
}
template <typename PaintBackendData>
bool nsNativeBasicTheme::DoPaintDefaultScrollbar(
PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
bool aHorizontal, nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
if (aFrame->PresContext()->UseOverlayScrollbars() &&
!aElementState.HasAtLeastOneOfStates(NS_EVENT_STATE_HOVER |
NS_EVENT_STATE_ACTIVE)) {
return true;
}
auto scrollbarColor =
ComputeScrollbarTrackColor(aFrame, aStyle, aDocumentState, aColors);
FillRect(aPaintData, aRect, scrollbarColor);
return true;
}
bool nsNativeBasicTheme::PaintScrollbar(
DrawTarget& aDrawTarget, const LayoutDeviceRect& aRect, bool aHorizontal,
nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
return DoPaintDefaultScrollbar(aDrawTarget, aRect, aHorizontal, aFrame,
aStyle, aElementState, aDocumentState, aColors,
aDpiRatio);
}
bool nsNativeBasicTheme::PaintScrollbar(
WebRenderBackendData& aWrData, const LayoutDeviceRect& aRect,
bool aHorizontal, nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aElementState, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
return DoPaintDefaultScrollbar(aWrData, aRect, aHorizontal, aFrame, aStyle,
aElementState, aDocumentState, aColors,
aDpiRatio);
}
template <typename PaintBackendData>
bool nsNativeBasicTheme::DoPaintDefaultScrollCorner(
PaintBackendData& aPaintData, const LayoutDeviceRect& aRect,
nsIFrame* aFrame, const ComputedStyle& aStyle,
const EventStates& aDocumentState, const Colors& aColors,
DPIRatio aDpiRatio) {
auto scrollbarColor =
ComputeScrollbarTrackColor(aFrame, aStyle, aDocumentState, aColors);
FillRect(aPaintData, aRect, scrollbarColor);
return true;
}
bool nsNativeBasicTheme::PaintScrollCorner(
DrawTarget& aDrawTarget, const LayoutDeviceRect& aRect, nsIFrame* aFrame,
const ComputedStyle& aStyle, const EventStates& aDocumentState,
const Colors& aColors, DPIRatio aDpiRatio) {
return DoPaintDefaultScrollCorner(aDrawTarget, aRect, aFrame, aStyle,
aDocumentState, aColors, aDpiRatio);
}
bool nsNativeBasicTheme::PaintScrollCorner(WebRenderBackendData& aWrData,
const LayoutDeviceRect& aRect,
nsIFrame* aFrame,
const ComputedStyle& aStyle,
const EventStates& aDocumentState,
const Colors& aColors,
DPIRatio aDpiRatio) {
return DoPaintDefaultScrollCorner(aWrData, aRect, aFrame, aStyle,
aDocumentState, aColors, aDpiRatio);
}
void nsNativeBasicTheme::PaintScrollbarButton(
DrawTarget& aDrawTarget, StyleAppearance aAppearance,
const LayoutDeviceRect& aRect, nsIFrame* aFrame,
const ComputedStyle& aStyle, const EventStates& aElementState,
const EventStates& aDocumentState, const Colors& aColors,
DPIRatio aDpiRatio) {
auto [buttonColor, arrowColor] = ComputeScrollbarButtonColors(
aFrame, aAppearance, aStyle, aElementState, aDocumentState, aColors);
aDrawTarget.FillRect(aRect.ToUnknownRect(),
ColorPattern(ToDeviceColor(buttonColor)));
// Start with Up arrow.
float arrowPolygonX[] = {-4.0f, 0.0f, 4.0f, 4.0f, 0.0f, -4.0f};
float arrowPolygonY[] = {0.0f, -4.0f, 0.0f, 3.0f, -1.0f, 3.0f};
const float kPolygonSize = 17;
const int32_t arrowNumPoints = ArrayLength(arrowPolygonX);
switch (aAppearance) {
case StyleAppearance::ScrollbarbuttonUp:
break;
case StyleAppearance::ScrollbarbuttonDown:
for (int32_t i = 0; i < arrowNumPoints; i++) {
arrowPolygonY[i] *= -1;
}
break;
case StyleAppearance::ScrollbarbuttonLeft:
for (int32_t i = 0; i < arrowNumPoints; i++) {
int32_t temp = arrowPolygonX[i];
arrowPolygonX[i] = arrowPolygonY[i];
arrowPolygonY[i] = temp;
}
break;
case StyleAppearance::ScrollbarbuttonRight:
for (int32_t i = 0; i < arrowNumPoints; i++) {
int32_t temp = arrowPolygonX[i];
arrowPolygonX[i] = arrowPolygonY[i] * -1;
arrowPolygonY[i] = temp;
}
break;
default:
return;
}
PaintArrow(aDrawTarget, aRect, arrowPolygonX, arrowPolygonY, kPolygonSize,
arrowNumPoints, arrowColor);
}
NS_IMETHODIMP
nsNativeBasicTheme::DrawWidgetBackground(gfxContext* aContext, nsIFrame* aFrame,
StyleAppearance aAppearance,
const nsRect& aRect,
const nsRect& /* aDirtyRect */,
DrawOverflow aDrawOverflow) {
if (!DoDrawWidgetBackground(*aContext->GetDrawTarget(), aFrame, aAppearance,
aRect, aDrawOverflow)) {
return NS_ERROR_NOT_IMPLEMENTED;
}
return NS_OK;
}
bool nsNativeBasicTheme::CreateWebRenderCommandsForWidget(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const mozilla::layers::StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager, nsIFrame* aFrame,
StyleAppearance aAppearance, const nsRect& aRect) {
if (!StaticPrefs::widget_non_native_theme_webrender()) {
return false;
}
WebRenderBackendData data{aBuilder, aResources, aSc, aManager};
return DoDrawWidgetBackground(data, aFrame, aAppearance, aRect,
DrawOverflow::Yes);
}
static LayoutDeviceRect ToSnappedRect(const nsRect& aRect,
nscoord aTwipsPerPixel, DrawTarget& aDt) {
return LayoutDeviceRect::FromUnknownRect(
NSRectToSnappedRect(aRect, aTwipsPerPixel, aDt));
}
static LayoutDeviceRect ToSnappedRect(
const nsRect& aRect, nscoord aTwipsPerPixel,
nsNativeBasicTheme::WebRenderBackendData& aDt) {
// TODO: Do we need to do any more snapping here?
return LayoutDeviceRect::FromAppUnits(aRect, aTwipsPerPixel);
}
bool nsNativeBasicTheme::ShouldBeHighContrast(const nsPresContext& aPc) {
// We make sure that we're drawing backgrounds, since otherwise layout will
// darken our used text colors etc anyways, and that can cause contrast issues
// with dark high-contrast themes.
return aPc.GetBackgroundColorDraw() &&
PreferenceSheet::PrefsFor(*aPc.Document())
.NonNativeThemeShouldBeHighContrast();
}
template <typename PaintBackendData>
bool nsNativeBasicTheme::DoDrawWidgetBackground(PaintBackendData& aPaintData,
nsIFrame* aFrame,
StyleAppearance aAppearance,
const nsRect& aRect,
DrawOverflow aDrawOverflow) {
static_assert(std::is_same_v<PaintBackendData, DrawTarget> ||
std::is_same_v<PaintBackendData, WebRenderBackendData>);
const nsPresContext* pc = aFrame->PresContext();
const nscoord twipsPerPixel = pc->AppUnitsPerDevPixel();
const auto devPxRect = ToSnappedRect(aRect, twipsPerPixel, aPaintData);
const EventStates docState = pc->Document()->GetDocumentState();
EventStates eventState = GetContentState(aFrame, aAppearance);
if (aAppearance == StyleAppearance::MozMenulistArrowButton) {
bool isHTML = IsHTMLContent(aFrame);
nsIFrame* parentFrame = aFrame->GetParent();
bool isMenulist = !isHTML && parentFrame->IsMenuFrame();
// HTML select and XUL menulist dropdown buttons get state from the
// parent.
if (isHTML || isMenulist) {
aFrame = parentFrame;
eventState = GetContentState(parentFrame, aAppearance);
}
}
// Don't paint the outline if we're asked not to draw overflow, or if the
// author has specified another kind of outline on focus.
if (aDrawOverflow == DrawOverflow::No ||
!aFrame->StyleOutline()->mOutlineStyle.IsAuto()) {
eventState &= ~NS_EVENT_STATE_FOCUSRING;
}
// Hack to avoid skia fuzziness: Add a dummy clip if the widget doesn't
// overflow devPxRect.
Maybe<AutoClipRect> maybeClipRect;
if constexpr (std::is_same_v<PaintBackendData, DrawTarget>) {
if (aAppearance != StyleAppearance::FocusOutline &&
aAppearance != StyleAppearance::Range &&
!eventState.HasState(NS_EVENT_STATE_FOCUSRING)) {
maybeClipRect.emplace(aPaintData, devPxRect);
}
}
const Colors colors(aFrame);
DPIRatio dpiRatio = GetDPIRatio(aFrame, aAppearance);
switch (aAppearance) {
case StyleAppearance::Radio: {
auto rect = CheckBoxRadioRect(devPxRect);
PaintRadioControl(aPaintData, rect, eventState, colors, dpiRatio);
break;
}
case StyleAppearance::Checkbox: {
if constexpr (std::is_same_v<PaintBackendData, WebRenderBackendData>) {
// TODO: Need to figure out how to best draw this using WR.
return false;
} else {
auto rect = CheckBoxRadioRect(devPxRect);
PaintCheckboxControl(aPaintData, rect, eventState, colors, dpiRatio);
}
break;
}
case StyleAppearance::Textarea:
case StyleAppearance::Textfield:
case StyleAppearance::NumberInput:
PaintTextField(aPaintData, devPxRect, eventState, colors, dpiRatio);
break;
case StyleAppearance::Listbox:
PaintListbox(aPaintData, devPxRect, eventState, colors, dpiRatio);
break;
case StyleAppearance::MenulistButton:
case StyleAppearance::Menulist:
PaintMenulist(aPaintData, devPxRect, eventState, colors, dpiRatio);
break;
case StyleAppearance::MozMenulistArrowButton:
if constexpr (std::is_same_v<PaintBackendData, WebRenderBackendData>) {
// TODO: Need to figure out how to best draw this using WR.
return false;
} else {
PaintMenulistArrowButton(aFrame, aPaintData, devPxRect, eventState);
}
break;
case StyleAppearance::SpinnerUpbutton:
case StyleAppearance::SpinnerDownbutton:
if constexpr (std::is_same_v<PaintBackendData, WebRenderBackendData>) {
// TODO: Need to figure out how to best draw this using WR.
return false;
} else {
PaintSpinnerButton(aFrame, aPaintData, devPxRect, eventState,
aAppearance, colors, dpiRatio);
}
break;
case StyleAppearance::Range:
PaintRange(aFrame, aPaintData, devPxRect, eventState, colors, dpiRatio,
IsRangeHorizontal(aFrame));
break;
case StyleAppearance::RangeThumb:
// Painted as part of StyleAppearance::Range.
break;
case StyleAppearance::ProgressBar:
PaintProgress(aFrame, aPaintData, devPxRect, eventState, colors, dpiRatio,
/* aIsMeter = */ false);
break;
case StyleAppearance::Progresschunk:
/* Painted as part of the progress bar */
break;
case StyleAppearance::Meter:
PaintProgress(aFrame, aPaintData, devPxRect, eventState, colors, dpiRatio,
/* aIsMeter = */ true);
break;
case StyleAppearance::Meterchunk:
/* Painted as part of the meter bar */
break;
case StyleAppearance::ScrollbarthumbHorizontal:
case StyleAppearance::ScrollbarthumbVertical: {
bool isHorizontal =
aAppearance == StyleAppearance::ScrollbarthumbHorizontal;
return PaintScrollbarThumb(aPaintData, devPxRect, isHorizontal, aFrame,
*nsLayoutUtils::StyleForScrollbar(aFrame),
eventState, docState, colors, dpiRatio);
}
case StyleAppearance::ScrollbartrackHorizontal:
case StyleAppearance::ScrollbartrackVertical: {
bool isHorizontal =
aAppearance == StyleAppearance::ScrollbartrackHorizontal;
return PaintScrollbarTrack(aPaintData, devPxRect, isHorizontal, aFrame,
*nsLayoutUtils::StyleForScrollbar(aFrame),
docState, colors, dpiRatio);
}
case StyleAppearance::ScrollbarHorizontal:
case StyleAppearance::ScrollbarVertical: {
bool isHorizontal = aAppearance == StyleAppearance::ScrollbarHorizontal;
return PaintScrollbar(aPaintData, devPxRect, isHorizontal, aFrame,
*nsLayoutUtils::StyleForScrollbar(aFrame),
eventState, docState, colors, dpiRatio);
}
case StyleAppearance::Scrollcorner:
return PaintScrollCorner(aPaintData, devPxRect, aFrame,
*nsLayoutUtils::StyleForScrollbar(aFrame),
docState, colors, dpiRatio);
case StyleAppearance::ScrollbarbuttonUp:
case StyleAppearance::ScrollbarbuttonDown:
case StyleAppearance::ScrollbarbuttonLeft:
case StyleAppearance::ScrollbarbuttonRight:
// For scrollbar-width:thin, we don't display the buttons.
if (!IsScrollbarWidthThin(aFrame)) {
if constexpr (std::is_same_v<PaintBackendData, WebRenderBackendData>) {
// TODO: Need to figure out how to best draw this using WR.
return false;
} else {
PaintScrollbarButton(aPaintData, aAppearance, devPxRect, aFrame,
*nsLayoutUtils::StyleForScrollbar(aFrame),
eventState, docState, colors, dpiRatio);
}
}
break;
case StyleAppearance::Button:
PaintButton(aFrame, aPaintData, devPxRect, eventState, colors, dpiRatio);
break;
case StyleAppearance::FocusOutline:
PaintAutoStyleOutline(aFrame, aPaintData, devPxRect, colors, dpiRatio);
break;
default:
// Various appearance values are used for XUL elements. Normally these
// will not be available in content documents (and thus in the content
// processes where the native basic theme can be used), but tests are
// run with the remote XUL pref enabled and so we can get in here. So
// we just return an error rather than assert.
return false;
}
return true;
}
template <typename PaintBackendData>
void nsNativeBasicTheme::PaintAutoStyleOutline(nsIFrame* aFrame,
PaintBackendData& aPaintData,
const LayoutDeviceRect& aRect,
const Colors& aColors,
DPIRatio aDpiRatio) {
auto [innerColor, middleColor, outerColor] = ComputeFocusRectColors(aColors);
Unused << middleColor;
Unused << outerColor;
LayoutDeviceRect rect(aRect);
auto width =
LayoutDeviceCoord(SnapBorderWidth(kInnerFocusOutlineWidth, aDpiRatio));
rect.Inflate(width);
const nscoord offset = aFrame->StyleOutline()->mOutlineOffset.ToAppUnits();
nscoord cssRadii[8];
if (!aFrame->GetBorderRadii(cssRadii)) {
const CSSCoord cssOffset = CSSCoord::FromAppUnits(offset);
const CSSCoord radius =
cssOffset >= 0.0f
? kInnerFocusOutlineWidth
: std::max(kInnerFocusOutlineWidth + cssOffset, CSSCoord(0.0f));
return PaintRoundedRectWithRadius(aPaintData, rect, sRGBColor::White(0.0f),
innerColor, kInnerFocusOutlineWidth,
radius, aDpiRatio);
}
nsPresContext* pc = aFrame->PresContext();
const Float devPixelOffset = pc->AppUnitsToFloatDevPixels(offset);
RectCornerRadii innerRadii;
nsCSSRendering::ComputePixelRadii(cssRadii, pc->AppUnitsPerDevPixel(),
&innerRadii);
const auto borderColor = ToDeviceColor(innerColor);
// NOTE(emilio): This doesn't use PaintRoundedRectWithRadius because we need
// to support arbitrary radii.
RectCornerRadii outerRadii;
if constexpr (std::is_same_v<PaintBackendData, WebRenderBackendData>) {
const Float widths[4] = {width + devPixelOffset, width + devPixelOffset,
width + devPixelOffset, width + devPixelOffset};
nsCSSBorderRenderer::ComputeOuterRadii(innerRadii, widths, &outerRadii);
const auto dest = wr::ToLayoutRect(rect);
const auto side = wr::ToBorderSide(borderColor, StyleBorderStyle::Solid);
const wr::BorderSide sides[4] = {side, side, side, side};
const bool kBackfaceIsVisible = true;
const auto wrWidths = wr::ToBorderWidths(width, width, width, width);
const auto wrRadius = wr::ToBorderRadius(outerRadii);
aPaintData.mBuilder.PushBorder(dest, dest, kBackfaceIsVisible, wrWidths,
{sides, 4}, wrRadius);
} else {
const LayoutDeviceCoord halfWidth = width * 0.5f;
rect.Deflate(halfWidth);
const Float widths[4] = {
halfWidth + devPixelOffset, halfWidth + devPixelOffset,
halfWidth + devPixelOffset, halfWidth + devPixelOffset};
nsCSSBorderRenderer::ComputeOuterRadii(innerRadii, widths, &outerRadii);
RefPtr<Path> path =
MakePathForRoundedRect(aPaintData, rect.ToUnknownRect(), outerRadii);
aPaintData.Stroke(path, ColorPattern(borderColor), StrokeOptions(width));
}
}
LayoutDeviceIntMargin nsNativeBasicTheme::GetWidgetBorder(
nsDeviceContext* aContext, nsIFrame* aFrame, StyleAppearance aAppearance) {
switch (aAppearance) {
case StyleAppearance::Textfield:
case StyleAppearance::Textarea:
case StyleAppearance::NumberInput:
case StyleAppearance::Listbox:
case StyleAppearance::Menulist:
case StyleAppearance::MenulistButton:
case StyleAppearance::Button:
// Return the border size from the UA sheet, even though what we paint
// doesn't actually match that. We know this is the UA sheet border
// because we disable native theming when different border widths are
// specified by authors, see nsNativeBasicTheme::IsWidgetStyled.
//
// The Rounded() bit is technically redundant, but needed to appease the
// type system, we should always end up with full device pixels due to
// round_border_to_device_pixels at style time.
return LayoutDeviceIntMargin::FromAppUnits(
aFrame->StyleBorder()->GetComputedBorder(),
aFrame->PresContext()->AppUnitsPerDevPixel())
.Rounded();
case StyleAppearance::Checkbox:
case StyleAppearance::Radio: {
DPIRatio dpiRatio = GetDPIRatio(aFrame, aAppearance);
LayoutDeviceIntCoord w =
SnapBorderWidth(kCheckboxRadioBorderWidth, dpiRatio);
return LayoutDeviceIntMargin(w, w, w, w);
}
default:
return LayoutDeviceIntMargin();
}
}
bool nsNativeBasicTheme::GetWidgetPadding(nsDeviceContext* aContext,
nsIFrame* aFrame,
StyleAppearance aAppearance,
LayoutDeviceIntMargin* aResult) {
switch (aAppearance) {
// Radios and checkboxes return a fixed size in GetMinimumWidgetSize
// and have a meaningful baseline, so they can't have
// author-specified padding.
case StyleAppearance::Radio:
case StyleAppearance::Checkbox:
aResult->SizeTo(0, 0, 0, 0);
return true;
default:
break;
}
return false;
}
bool nsNativeBasicTheme::GetWidgetOverflow(nsDeviceContext* aContext,
nsIFrame* aFrame,
StyleAppearance aAppearance,
nsRect* aOverflowRect) {
nsIntMargin overflow;
switch (aAppearance) {
case StyleAppearance::FocusOutline:
// 2px * one segment
overflow.SizeTo(2, 2, 2, 2);
break;
case StyleAppearance::Radio:
case StyleAppearance::Checkbox:
case StyleAppearance::Range:
// 2px for each outline segment, plus 1px separation, plus we paint with a
// 1px extra offset, so 6px.
overflow.SizeTo(6, 6, 6, 6);
break;
case StyleAppearance::Textarea:
case StyleAppearance::Textfield:
case StyleAppearance::NumberInput:
case StyleAppearance::Listbox:
case StyleAppearance::MenulistButton:
case StyleAppearance::Menulist:
case StyleAppearance::Button:
// 2px for each segment, plus 1px separation, but we paint 1px inside
// the border area so 4px overflow.
overflow.SizeTo(4, 4, 4, 4);
break;
default:
return false;
}
// TODO: This should convert from device pixels to app units, not from CSS
// pixels. And it should take the dpi ratio into account.
// Using CSS pixels can cause the overflow to be too small if the page is
// zoomed out.
aOverflowRect->Inflate(nsMargin(CSSPixel::ToAppUnits(overflow.top),
CSSPixel::ToAppUnits(overflow.right),
CSSPixel::ToAppUnits(overflow.bottom),
CSSPixel::ToAppUnits(overflow.left)));
return true;
}
auto nsNativeBasicTheme::GetScrollbarSizes(nsPresContext* aPresContext,
StyleScrollbarWidth aWidth, Overlay)
-> ScrollbarSizes {
CSSIntCoord h = sHorizontalScrollbarHeight;
CSSIntCoord w = sVerticalScrollbarWidth;
if (aWidth == StyleScrollbarWidth::Thin) {
h /= 2;
w /= 2;
}
auto dpi = GetDPIRatioForScrollbarPart(aPresContext);
return {(CSSCoord(w) * dpi).Rounded(), (CSSCoord(h) * dpi).Rounded()};
}
nscoord nsNativeBasicTheme::GetCheckboxRadioPrefSize() {
return CSSPixel::ToAppUnits(kCheckboxRadioContentBoxSize);
}
NS_IMETHODIMP
nsNativeBasicTheme::GetMinimumWidgetSize(nsPresContext* aPresContext,
nsIFrame* aFrame,
StyleAppearance aAppearance,
LayoutDeviceIntSize* aResult,
bool* aIsOverridable) {
DPIRatio dpiRatio = GetDPIRatio(aFrame, aAppearance);
aResult->width = aResult->height = 0;
*aIsOverridable = true;
switch (aAppearance) {
case StyleAppearance::Button:
if (aFrame->IsColorControlFrame()) {
aResult->height = (kMinimumColorPickerHeight * dpiRatio).Rounded();
}
break;
case StyleAppearance::RangeThumb:
aResult->SizeTo((kMinimumRangeThumbSize * dpiRatio).Rounded(),
(kMinimumRangeThumbSize * dpiRatio).Rounded());
break;
case StyleAppearance::MozMenulistArrowButton:
aResult->width = (kMinimumDropdownArrowButtonWidth * dpiRatio).Rounded();
break;
case StyleAppearance::SpinnerUpbutton:
case StyleAppearance::SpinnerDownbutton:
aResult->width = (kMinimumSpinnerButtonWidth * dpiRatio).Rounded();
aResult->height = (kMinimumSpinnerButtonHeight * dpiRatio).Rounded();
break;
case StyleAppearance::ScrollbarbuttonUp:
case StyleAppearance::ScrollbarbuttonDown:
case StyleAppearance::ScrollbarbuttonLeft:
case StyleAppearance::ScrollbarbuttonRight:
// For scrollbar-width:thin, we don't display the buttons.
if (IsScrollbarWidthThin(aFrame)) {
aResult->SizeTo(0, 0);
break;
}
[[fallthrough]];
case StyleAppearance::ScrollbarthumbVertical:
case StyleAppearance::ScrollbarthumbHorizontal: {
auto* style = nsLayoutUtils::StyleForScrollbar(aFrame);
auto width = style->StyleUIReset()->mScrollbarWidth;
auto sizes = GetScrollbarSizes(aPresContext, width, Overlay::No);
// TODO: for short scrollbars it could be nice if the thumb could shrink
// under this size.
const bool isHorizontal =
aAppearance == StyleAppearance::ScrollbarthumbHorizontal ||
aAppearance == StyleAppearance::ScrollbarbuttonLeft ||
aAppearance == StyleAppearance::ScrollbarbuttonRight;
const auto size = isHorizontal ? sizes.mHorizontal : sizes.mVertical;
aResult->SizeTo(size, size);
break;
}
default:
break;
}
return NS_OK;
}
nsITheme::Transparency nsNativeBasicTheme::GetWidgetTransparency(
nsIFrame*, StyleAppearance) {
return eUnknownTransparency;
}
NS_IMETHODIMP
nsNativeBasicTheme::WidgetStateChanged(nsIFrame* aFrame,
StyleAppearance aAppearance,
nsAtom* aAttribute, bool* aShouldRepaint,
const nsAttrValue* aOldValue) {
if (!aAttribute) {
// Hover/focus/active changed. Always repaint.
*aShouldRepaint = true;
} else {
// Check the attribute to see if it's relevant.
// disabled, checked, dlgtype, default, etc.
*aShouldRepaint = false;
if (aAttribute == nsGkAtoms::disabled || aAttribute == nsGkAtoms::checked ||
aAttribute == nsGkAtoms::selected ||
aAttribute == nsGkAtoms::visuallyselected ||
aAttribute == nsGkAtoms::menuactive ||
aAttribute == nsGkAtoms::sortDirection ||
aAttribute == nsGkAtoms::focused || aAttribute == nsGkAtoms::_default ||
aAttribute == nsGkAtoms::open || aAttribute == nsGkAtoms::hover) {
*aShouldRepaint = true;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsNativeBasicTheme::ThemeChanged() { return NS_OK; }
bool nsNativeBasicTheme::WidgetAppearanceDependsOnWindowFocus(
StyleAppearance aAppearance) {
return IsWidgetScrollbarPart(aAppearance);
}
nsITheme::ThemeGeometryType nsNativeBasicTheme::ThemeGeometryTypeForWidget(
nsIFrame* aFrame, StyleAppearance aAppearance) {
return eThemeGeometryTypeUnknown;
}
bool nsNativeBasicTheme::ThemeSupportsWidget(nsPresContext* aPresContext,
nsIFrame* aFrame,
StyleAppearance aAppearance) {
switch (aAppearance) {
case StyleAppearance::Radio:
case StyleAppearance::Checkbox:
case StyleAppearance::FocusOutline:
case StyleAppearance::Textarea:
case StyleAppearance::Textfield:
case StyleAppearance::Range:
case StyleAppearance::RangeThumb:
case StyleAppearance::ProgressBar:
case StyleAppearance::Progresschunk:
case StyleAppearance::Meter:
case StyleAppearance::Meterchunk:
case StyleAppearance::ScrollbarbuttonUp:
case StyleAppearance::ScrollbarbuttonDown:
case StyleAppearance::ScrollbarbuttonLeft:
case StyleAppearance::ScrollbarbuttonRight:
case StyleAppearance::ScrollbarthumbHorizontal:
case StyleAppearance::ScrollbarthumbVertical:
case StyleAppearance::ScrollbartrackHorizontal:
case StyleAppearance::ScrollbartrackVertical:
case StyleAppearance::ScrollbarHorizontal:
case StyleAppearance::ScrollbarVertical:
case StyleAppearance::Scrollcorner:
case StyleAppearance::Button:
case StyleAppearance::Listbox:
case StyleAppearance::Menulist:
case StyleAppearance::MenulistButton:
case StyleAppearance::NumberInput:
case StyleAppearance::MozMenulistArrowButton:
case StyleAppearance::SpinnerUpbutton:
case StyleAppearance::SpinnerDownbutton:
return !IsWidgetStyled(aPresContext, aFrame, aAppearance);
default:
return false;
}
}
bool nsNativeBasicTheme::WidgetIsContainer(StyleAppearance aAppearance) {
switch (aAppearance) {
case StyleAppearance::MozMenulistArrowButton:
case StyleAppearance::Radio:
case StyleAppearance::Checkbox:
return false;
default:
return true;
}
}
bool nsNativeBasicTheme::ThemeDrawsFocusForWidget(StyleAppearance aAppearance) {
return true;
}
bool nsNativeBasicTheme::ThemeNeedsComboboxDropmarker() { return true; }
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