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ladybird/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
Linus Groh 6e19ab2bbc AK+Everywhere: Rename String to DeprecatedString 
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
2022-12-06 08:54:33 +01:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
#include <LibGfx/Palette.h>
#include <LibWeb/CSS/Serialize.h>
#include <LibWeb/CSS/StyleValue.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/BrowsingContext.h>
#include <LibWeb/Loader/LoadRequest.h>
#include <LibWeb/Loader/ResourceLoader.h>
#include <LibWeb/Page/Page.h>
#include <LibWeb/Painting/GradientPainting.h>
#include <LibWeb/Platform/Timer.h>
namespace Web::CSS {
StyleValue::StyleValue(Type type)
: m_type(type)
{
}
AbstractImageStyleValue const& StyleValue::as_abstract_image() const
{
VERIFY(is_abstract_image());
return static_cast<AbstractImageStyleValue const&>(*this);
}
AngleStyleValue const& StyleValue::as_angle() const
{
VERIFY(is_angle());
return static_cast<AngleStyleValue const&>(*this);
}
BackgroundStyleValue const& StyleValue::as_background() const
{
VERIFY(is_background());
return static_cast<BackgroundStyleValue const&>(*this);
}
BackgroundRepeatStyleValue const& StyleValue::as_background_repeat() const
{
VERIFY(is_background_repeat());
return static_cast<BackgroundRepeatStyleValue const&>(*this);
}
BackgroundSizeStyleValue const& StyleValue::as_background_size() const
{
VERIFY(is_background_size());
return static_cast<BackgroundSizeStyleValue const&>(*this);
}
BorderStyleValue const& StyleValue::as_border() const
{
VERIFY(is_border());
return static_cast<BorderStyleValue const&>(*this);
}
BorderRadiusStyleValue const& StyleValue::as_border_radius() const
{
VERIFY(is_border_radius());
return static_cast<BorderRadiusStyleValue const&>(*this);
}
BorderRadiusShorthandStyleValue const& StyleValue::as_border_radius_shorthand() const
{
VERIFY(is_border_radius_shorthand());
return static_cast<BorderRadiusShorthandStyleValue const&>(*this);
}
ShadowStyleValue const& StyleValue::as_shadow() const
{
VERIFY(is_shadow());
return static_cast<ShadowStyleValue const&>(*this);
}
CalculatedStyleValue const& StyleValue::as_calculated() const
{
VERIFY(is_calculated());
return static_cast<CalculatedStyleValue const&>(*this);
}
ColorStyleValue const& StyleValue::as_color() const
{
VERIFY(is_color());
return static_cast<ColorStyleValue const&>(*this);
}
ConicGradientStyleValue const& StyleValue::as_conic_gradient() const
{
VERIFY(is_conic_gradient());
return static_cast<ConicGradientStyleValue const&>(*this);
}
ContentStyleValue const& StyleValue::as_content() const
{
VERIFY(is_content());
return static_cast<ContentStyleValue const&>(*this);
}
FilterValueListStyleValue const& StyleValue::as_filter_value_list() const
{
VERIFY(is_filter_value_list());
return static_cast<FilterValueListStyleValue const&>(*this);
}
FlexStyleValue const& StyleValue::as_flex() const
{
VERIFY(is_flex());
return static_cast<FlexStyleValue const&>(*this);
}
FlexFlowStyleValue const& StyleValue::as_flex_flow() const
{
VERIFY(is_flex_flow());
return static_cast<FlexFlowStyleValue const&>(*this);
}
FontStyleValue const& StyleValue::as_font() const
{
VERIFY(is_font());
return static_cast<FontStyleValue const&>(*this);
}
FrequencyStyleValue const& StyleValue::as_frequency() const
{
VERIFY(is_frequency());
return static_cast<FrequencyStyleValue const&>(*this);
}
GridTrackPlacementShorthandStyleValue const& StyleValue::as_grid_track_placement_shorthand() const
{
VERIFY(is_grid_track_placement_shorthand());
return static_cast<GridTrackPlacementShorthandStyleValue const&>(*this);
}
GridTrackPlacementStyleValue const& StyleValue::as_grid_track_placement() const
{
VERIFY(is_grid_track_placement());
return static_cast<GridTrackPlacementStyleValue const&>(*this);
}
IdentifierStyleValue const& StyleValue::as_identifier() const
{
VERIFY(is_identifier());
return static_cast<IdentifierStyleValue const&>(*this);
}
ImageStyleValue const& StyleValue::as_image() const
{
VERIFY(is_image());
return static_cast<ImageStyleValue const&>(*this);
}
InheritStyleValue const& StyleValue::as_inherit() const
{
VERIFY(is_inherit());
return static_cast<InheritStyleValue const&>(*this);
}
InitialStyleValue const& StyleValue::as_initial() const
{
VERIFY(is_initial());
return static_cast<InitialStyleValue const&>(*this);
}
LengthStyleValue const& StyleValue::as_length() const
{
VERIFY(is_length());
return static_cast<LengthStyleValue const&>(*this);
}
GridTrackSizeStyleValue const& StyleValue::as_grid_track_size_list() const
{
VERIFY(is_grid_track_size_list());
return static_cast<GridTrackSizeStyleValue const&>(*this);
}
LinearGradientStyleValue const& StyleValue::as_linear_gradient() const
{
VERIFY(is_linear_gradient());
return static_cast<LinearGradientStyleValue const&>(*this);
}
ListStyleStyleValue const& StyleValue::as_list_style() const
{
VERIFY(is_list_style());
return static_cast<ListStyleStyleValue const&>(*this);
}
NumericStyleValue const& StyleValue::as_numeric() const
{
VERIFY(is_numeric());
return static_cast<NumericStyleValue const&>(*this);
}
OverflowStyleValue const& StyleValue::as_overflow() const
{
VERIFY(is_overflow());
return static_cast<OverflowStyleValue const&>(*this);
}
PercentageStyleValue const& StyleValue::as_percentage() const
{
VERIFY(is_percentage());
return static_cast<PercentageStyleValue const&>(*this);
}
PositionStyleValue const& StyleValue::as_position() const
{
VERIFY(is_position());
return static_cast<PositionStyleValue const&>(*this);
}
RadialGradientStyleValue const& StyleValue::as_radial_gradient() const
{
VERIFY(is_radial_gradient());
return static_cast<RadialGradientStyleValue const&>(*this);
}
RectStyleValue const& StyleValue::as_rect() const
{
VERIFY(is_rect());
return static_cast<RectStyleValue const&>(*this);
}
ResolutionStyleValue const& StyleValue::as_resolution() const
{
VERIFY(is_resolution());
return static_cast<ResolutionStyleValue const&>(*this);
}
StringStyleValue const& StyleValue::as_string() const
{
VERIFY(is_string());
return static_cast<StringStyleValue const&>(*this);
}
TextDecorationStyleValue const& StyleValue::as_text_decoration() const
{
VERIFY(is_text_decoration());
return static_cast<TextDecorationStyleValue const&>(*this);
}
TimeStyleValue const& StyleValue::as_time() const
{
VERIFY(is_time());
return static_cast<TimeStyleValue const&>(*this);
}
TransformationStyleValue const& StyleValue::as_transformation() const
{
VERIFY(is_transformation());
return static_cast<TransformationStyleValue const&>(*this);
}
UnresolvedStyleValue const& StyleValue::as_unresolved() const
{
VERIFY(is_unresolved());
return static_cast<UnresolvedStyleValue const&>(*this);
}
UnsetStyleValue const& StyleValue::as_unset() const
{
VERIFY(is_unset());
return static_cast<UnsetStyleValue const&>(*this);
}
StyleValueList const& StyleValue::as_value_list() const
{
VERIFY(is_value_list());
return static_cast<StyleValueList const&>(*this);
}
BackgroundStyleValue::BackgroundStyleValue(
NonnullRefPtr<StyleValue> color,
NonnullRefPtr<StyleValue> image,
NonnullRefPtr<StyleValue> position,
NonnullRefPtr<StyleValue> size,
NonnullRefPtr<StyleValue> repeat,
NonnullRefPtr<StyleValue> attachment,
NonnullRefPtr<StyleValue> origin,
NonnullRefPtr<StyleValue> clip)
: StyleValue(Type::Background)
, m_color(color)
, m_image(image)
, m_position(position)
, m_size(size)
, m_repeat(repeat)
, m_attachment(attachment)
, m_origin(origin)
, m_clip(clip)
{
auto layer_count = [](auto style_value) -> size_t {
if (style_value->is_value_list())
return style_value->as_value_list().size();
else
return 1;
};
m_layer_count = max(layer_count(m_image), layer_count(m_position));
m_layer_count = max(m_layer_count, layer_count(m_size));
m_layer_count = max(m_layer_count, layer_count(m_repeat));
m_layer_count = max(m_layer_count, layer_count(m_attachment));
m_layer_count = max(m_layer_count, layer_count(m_origin));
m_layer_count = max(m_layer_count, layer_count(m_clip));
VERIFY(!m_color->is_value_list());
}
DeprecatedString BackgroundStyleValue::to_string() const
{
if (m_layer_count == 1) {
return DeprecatedString::formatted("{} {} {} {} {} {} {} {}", m_color->to_string(), m_image->to_string(), m_position->to_string(), m_size->to_string(), m_repeat->to_string(), m_attachment->to_string(), m_origin->to_string(), m_clip->to_string());
}
auto get_layer_value_string = [](NonnullRefPtr<StyleValue> const& style_value, size_t index) {
if (style_value->is_value_list())
return style_value->as_value_list().value_at(index, true)->to_string();
return style_value->to_string();
};
StringBuilder builder;
for (size_t i = 0; i < m_layer_count; i++) {
if (i)
builder.append(", "sv);
if (i == m_layer_count - 1)
builder.appendff("{} ", m_color->to_string());
builder.appendff("{} {} {} {} {} {} {}", get_layer_value_string(m_image, i), get_layer_value_string(m_position, i), get_layer_value_string(m_size, i), get_layer_value_string(m_repeat, i), get_layer_value_string(m_attachment, i), get_layer_value_string(m_origin, i), get_layer_value_string(m_clip, i));
}
return builder.to_string();
}
bool BackgroundStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_background();
return m_color->equals(typed_other.m_color)
&& m_image->equals(typed_other.m_image)
&& m_position->equals(typed_other.m_position)
&& m_size->equals(typed_other.m_size)
&& m_repeat->equals(typed_other.m_repeat)
&& m_attachment->equals(typed_other.m_attachment)
&& m_origin->equals(typed_other.m_origin)
&& m_clip->equals(typed_other.m_clip);
}
DeprecatedString BackgroundRepeatStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {}", CSS::to_string(m_repeat_x), CSS::to_string(m_repeat_y));
}
bool BackgroundRepeatStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_background_repeat();
return m_repeat_x == typed_other.m_repeat_x && m_repeat_y == typed_other.m_repeat_y;
}
DeprecatedString BackgroundSizeStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {}", m_size_x.to_string(), m_size_y.to_string());
}
bool BackgroundSizeStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_background_size();
return m_size_x == typed_other.m_size_x && m_size_y == typed_other.m_size_y;
}
DeprecatedString BorderStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {} {}", m_border_width->to_string(), m_border_style->to_string(), m_border_color->to_string());
}
bool BorderStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_border();
return m_border_width->equals(typed_other.m_border_width)
&& m_border_style->equals(typed_other.m_border_style)
&& m_border_color->equals(typed_other.m_border_color);
}
DeprecatedString BorderRadiusStyleValue::to_string() const
{
if (m_horizontal_radius == m_vertical_radius)
return m_horizontal_radius.to_string();
return DeprecatedString::formatted("{} / {}", m_horizontal_radius.to_string(), m_vertical_radius.to_string());
}
bool BorderRadiusStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_border_radius();
return m_is_elliptical == typed_other.m_is_elliptical
&& m_horizontal_radius == typed_other.m_horizontal_radius
&& m_vertical_radius == typed_other.m_vertical_radius;
}
DeprecatedString BorderRadiusShorthandStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {} {} {} / {} {} {} {}", m_top_left->horizontal_radius().to_string(), m_top_right->horizontal_radius().to_string(), m_bottom_right->horizontal_radius().to_string(), m_bottom_left->horizontal_radius().to_string(), m_top_left->vertical_radius().to_string(), m_top_right->vertical_radius().to_string(), m_bottom_right->vertical_radius().to_string(), m_bottom_left->vertical_radius().to_string());
}
bool BorderRadiusShorthandStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_border_radius_shorthand();
return m_top_left->equals(typed_other.m_top_left)
&& m_top_right->equals(typed_other.m_top_right)
&& m_bottom_right->equals(typed_other.m_bottom_right)
&& m_bottom_left->equals(typed_other.m_bottom_left);
}
void CalculatedStyleValue::CalculationResult::add(CalculationResult const& other, Layout::Node const* layout_node, PercentageBasis const& percentage_basis)
{
add_or_subtract_internal(SumOperation::Add, other, layout_node, percentage_basis);
}
void CalculatedStyleValue::CalculationResult::subtract(CalculationResult const& other, Layout::Node const* layout_node, PercentageBasis const& percentage_basis)
{
add_or_subtract_internal(SumOperation::Subtract, other, layout_node, percentage_basis);
}
void CalculatedStyleValue::CalculationResult::add_or_subtract_internal(SumOperation op, CalculationResult const& other, Layout::Node const* layout_node, PercentageBasis const& percentage_basis)
{
// We know from validation when resolving the type, that "both sides have the same type, or that one side is a <number> and the other is an <integer>".
// Though, having the same type may mean that one side is a <dimension> and the other a <percentage>.
// Note: This is almost identical to ::add()
m_value.visit(
[&](Number const& number) {
auto other_number = other.m_value.get<Number>();
if (op == SumOperation::Add) {
m_value = number + other_number;
} else {
m_value = number - other_number;
}
},
[&](Angle const& angle) {
auto this_degrees = angle.to_degrees();
if (other.m_value.has<Angle>()) {
auto other_degrees = other.m_value.get<Angle>().to_degrees();
if (op == SumOperation::Add)
m_value = Angle::make_degrees(this_degrees + other_degrees);
else
m_value = Angle::make_degrees(this_degrees - other_degrees);
} else {
VERIFY(percentage_basis.has<Angle>());
auto other_degrees = percentage_basis.get<Angle>().percentage_of(other.m_value.get<Percentage>()).to_degrees();
if (op == SumOperation::Add)
m_value = Angle::make_degrees(this_degrees + other_degrees);
else
m_value = Angle::make_degrees(this_degrees - other_degrees);
}
},
[&](Frequency const& frequency) {
auto this_hertz = frequency.to_hertz();
if (other.m_value.has<Frequency>()) {
auto other_hertz = other.m_value.get<Frequency>().to_hertz();
if (op == SumOperation::Add)
m_value = Frequency::make_hertz(this_hertz + other_hertz);
else
m_value = Frequency::make_hertz(this_hertz - other_hertz);
} else {
VERIFY(percentage_basis.has<Frequency>());
auto other_hertz = percentage_basis.get<Frequency>().percentage_of(other.m_value.get<Percentage>()).to_hertz();
if (op == SumOperation::Add)
m_value = Frequency::make_hertz(this_hertz + other_hertz);
else
m_value = Frequency::make_hertz(this_hertz - other_hertz);
}
},
[&](Length const& length) {
auto this_px = length.to_px(*layout_node);
if (other.m_value.has<Length>()) {
auto other_px = other.m_value.get<Length>().to_px(*layout_node);
if (op == SumOperation::Add)
m_value = Length::make_px(this_px + other_px);
else
m_value = Length::make_px(this_px - other_px);
} else {
VERIFY(percentage_basis.has<Length>());
auto other_px = percentage_basis.get<Length>().percentage_of(other.m_value.get<Percentage>()).to_px(*layout_node);
if (op == SumOperation::Add)
m_value = Length::make_px(this_px + other_px);
else
m_value = Length::make_px(this_px - other_px);
}
},
[&](Time const& time) {
auto this_seconds = time.to_seconds();
if (other.m_value.has<Time>()) {
auto other_seconds = other.m_value.get<Time>().to_seconds();
if (op == SumOperation::Add)
m_value = Time::make_seconds(this_seconds + other_seconds);
else
m_value = Time::make_seconds(this_seconds - other_seconds);
} else {
VERIFY(percentage_basis.has<Time>());
auto other_seconds = percentage_basis.get<Time>().percentage_of(other.m_value.get<Percentage>()).to_seconds();
if (op == SumOperation::Add)
m_value = Time::make_seconds(this_seconds + other_seconds);
else
m_value = Time::make_seconds(this_seconds - other_seconds);
}
},
[&](Percentage const& percentage) {
if (other.m_value.has<Percentage>()) {
if (op == SumOperation::Add)
m_value = Percentage { percentage.value() + other.m_value.get<Percentage>().value() };
else
m_value = Percentage { percentage.value() - other.m_value.get<Percentage>().value() };
return;
}
// Other side isn't a percentage, so the easiest way to handle it without duplicating all the logic, is just to swap `this` and `other`.
CalculationResult new_value = other;
if (op == SumOperation::Add) {
new_value.add(*this, layout_node, percentage_basis);
} else {
// Turn 'this - other' into '-other + this', as 'A + B == B + A', but 'A - B != B - A'
new_value.multiply_by({ Number { Number::Type::Integer, -1.0f } }, layout_node);
new_value.add(*this, layout_node, percentage_basis);
}
*this = new_value;
});
}
void CalculatedStyleValue::CalculationResult::multiply_by(CalculationResult const& other, Layout::Node const* layout_node)
{
// We know from validation when resolving the type, that at least one side must be a <number> or <integer>.
// Both of these are represented as a float.
VERIFY(m_value.has<Number>() || other.m_value.has<Number>());
bool other_is_number = other.m_value.has<Number>();
m_value.visit(
[&](Number const& number) {
if (other_is_number) {
m_value = number * other.m_value.get<Number>();
} else {
// Avoid duplicating all the logic by swapping `this` and `other`.
CalculationResult new_value = other;
new_value.multiply_by(*this, layout_node);
*this = new_value;
}
},
[&](Angle const& angle) {
m_value = Angle::make_degrees(angle.to_degrees() * other.m_value.get<Number>().value());
},
[&](Frequency const& frequency) {
m_value = Frequency::make_hertz(frequency.to_hertz() * other.m_value.get<Number>().value());
},
[&](Length const& length) {
VERIFY(layout_node);
m_value = Length::make_px(length.to_px(*layout_node) * other.m_value.get<Number>().value());
},
[&](Time const& time) {
m_value = Time::make_seconds(time.to_seconds() * other.m_value.get<Number>().value());
},
[&](Percentage const& percentage) {
m_value = Percentage { percentage.value() * other.m_value.get<Number>().value() };
});
}
void CalculatedStyleValue::CalculationResult::divide_by(CalculationResult const& other, Layout::Node const* layout_node)
{
// We know from validation when resolving the type, that `other` must be a <number> or <integer>.
// Both of these are represented as a Number.
auto denominator = other.m_value.get<Number>().value();
// FIXME: Dividing by 0 is invalid, and should be caught during parsing.
VERIFY(denominator != 0.0f);
m_value.visit(
[&](Number const& number) {
m_value = Number {
Number::Type::Number,
number.value() / denominator
};
},
[&](Angle const& angle) {
m_value = Angle::make_degrees(angle.to_degrees() / denominator);
},
[&](Frequency const& frequency) {
m_value = Frequency::make_hertz(frequency.to_hertz() / denominator);
},
[&](Length const& length) {
VERIFY(layout_node);
m_value = Length::make_px(length.to_px(*layout_node) / denominator);
},
[&](Time const& time) {
m_value = Time::make_seconds(time.to_seconds() / denominator);
},
[&](Percentage const& percentage) {
m_value = Percentage { percentage.value() / denominator };
});
}
DeprecatedString CalculatedStyleValue::to_string() const
{
return DeprecatedString::formatted("calc({})", m_expression->to_string());
}
bool CalculatedStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
// This is a case where comparing the strings actually makes sense.
return to_string() == other.to_string();
}
DeprecatedString CalculatedStyleValue::CalcNumberValue::to_string() const
{
return value.visit(
[](Number const& number) { return DeprecatedString::number(number.value()); },
[](NonnullOwnPtr<CalcNumberSum> const& sum) { return DeprecatedString::formatted("({})", sum->to_string()); });
}
DeprecatedString CalculatedStyleValue::CalcValue::to_string() const
{
return value.visit(
[](Number const& number) { return DeprecatedString::number(number.value()); },
[](NonnullOwnPtr<CalcSum> const& sum) { return DeprecatedString::formatted("({})", sum->to_string()); },
[](auto const& v) { return v.to_string(); });
}
DeprecatedString CalculatedStyleValue::CalcSum::to_string() const
{
StringBuilder builder;
builder.append(first_calc_product->to_string());
for (auto const& item : zero_or_more_additional_calc_products)
builder.append(item.to_string());
return builder.to_string();
}
DeprecatedString CalculatedStyleValue::CalcNumberSum::to_string() const
{
StringBuilder builder;
builder.append(first_calc_number_product->to_string());
for (auto const& item : zero_or_more_additional_calc_number_products)
builder.append(item.to_string());
return builder.to_string();
}
DeprecatedString CalculatedStyleValue::CalcProduct::to_string() const
{
StringBuilder builder;
builder.append(first_calc_value.to_string());
for (auto const& item : zero_or_more_additional_calc_values)
builder.append(item.to_string());
return builder.to_string();
}
DeprecatedString CalculatedStyleValue::CalcSumPartWithOperator::to_string() const
{
return DeprecatedString::formatted(" {} {}", op == SumOperation::Add ? "+"sv : "-"sv, value->to_string());
}
DeprecatedString CalculatedStyleValue::CalcProductPartWithOperator::to_string() const
{
auto value_string = value.visit(
[](CalcValue const& v) { return v.to_string(); },
[](CalcNumberValue const& v) { return v.to_string(); });
return DeprecatedString::formatted(" {} {}", op == ProductOperation::Multiply ? "*"sv : "/"sv, value_string);
}
DeprecatedString CalculatedStyleValue::CalcNumberProduct::to_string() const
{
StringBuilder builder;
builder.append(first_calc_number_value.to_string());
for (auto const& item : zero_or_more_additional_calc_number_values)
builder.append(item.to_string());
return builder.to_string();
}
DeprecatedString CalculatedStyleValue::CalcNumberProductPartWithOperator::to_string() const
{
return DeprecatedString::formatted(" {} {}", op == ProductOperation::Multiply ? "*"sv : "/"sv, value.to_string());
}
DeprecatedString CalculatedStyleValue::CalcNumberSumPartWithOperator::to_string() const
{
return DeprecatedString::formatted(" {} {}", op == SumOperation::Add ? "+"sv : "-"sv, value->to_string());
}
Optional<Angle> CalculatedStyleValue::resolve_angle() const
{
auto result = m_expression->resolve(nullptr, {});
if (result.value().has<Angle>())
return result.value().get<Angle>();
return {};
}
Optional<Angle> CalculatedStyleValue::resolve_angle_percentage(Angle const& percentage_basis) const
{
auto result = m_expression->resolve(nullptr, percentage_basis);
return result.value().visit(
[&](Angle const& angle) -> Optional<Angle> {
return angle;
},
[&](Percentage const& percentage) -> Optional<Angle> {
return percentage_basis.percentage_of(percentage);
},
[&](auto const&) -> Optional<Angle> {
return {};
});
}
Optional<Frequency> CalculatedStyleValue::resolve_frequency() const
{
auto result = m_expression->resolve(nullptr, {});
if (result.value().has<Frequency>())
return result.value().get<Frequency>();
return {};
}
Optional<Frequency> CalculatedStyleValue::resolve_frequency_percentage(Frequency const& percentage_basis) const
{
auto result = m_expression->resolve(nullptr, percentage_basis);
return result.value().visit(
[&](Frequency const& frequency) -> Optional<Frequency> {
return frequency;
},
[&](Percentage const& percentage) -> Optional<Frequency> {
return percentage_basis.percentage_of(percentage);
},
[&](auto const&) -> Optional<Frequency> {
return {};
});
}
Optional<Length> CalculatedStyleValue::resolve_length(Layout::Node const& layout_node) const
{
auto result = m_expression->resolve(&layout_node, {});
if (result.value().has<Length>())
return result.value().get<Length>();
return {};
}
Optional<Length> CalculatedStyleValue::resolve_length_percentage(Layout::Node const& layout_node, Length const& percentage_basis) const
{
auto result = m_expression->resolve(&layout_node, percentage_basis);
return result.value().visit(
[&](Length const& length) -> Optional<Length> {
return length;
},
[&](Percentage const& percentage) -> Optional<Length> {
return percentage_basis.percentage_of(percentage);
},
[&](auto const&) -> Optional<Length> {
return {};
});
}
Optional<Percentage> CalculatedStyleValue::resolve_percentage() const
{
auto result = m_expression->resolve(nullptr, {});
if (result.value().has<Percentage>())
return result.value().get<Percentage>();
return {};
}
Optional<Time> CalculatedStyleValue::resolve_time() const
{
auto result = m_expression->resolve(nullptr, {});
if (result.value().has<Time>())
return result.value().get<Time>();
return {};
}
Optional<Time> CalculatedStyleValue::resolve_time_percentage(Time const& percentage_basis) const
{
auto result = m_expression->resolve(nullptr, percentage_basis);
return result.value().visit(
[&](Time const& time) -> Optional<Time> {
return time;
},
[&](auto const&) -> Optional<Time> {
return {};
});
}
Optional<float> CalculatedStyleValue::resolve_number()
{
auto result = m_expression->resolve(nullptr, {});
if (result.value().has<Number>())
return result.value().get<Number>().value();
return {};
}
Optional<i64> CalculatedStyleValue::resolve_integer()
{
auto result = m_expression->resolve(nullptr, {});
if (result.value().has<Number>())
return result.value().get<Number>().integer_value();
return {};
}
static bool is_number(CalculatedStyleValue::ResolvedType type)
{
return type == CalculatedStyleValue::ResolvedType::Number || type == CalculatedStyleValue::ResolvedType::Integer;
}
static bool is_dimension(CalculatedStyleValue::ResolvedType type)
{
return type != CalculatedStyleValue::ResolvedType::Number
&& type != CalculatedStyleValue::ResolvedType::Integer
&& type != CalculatedStyleValue::ResolvedType::Percentage;
}
template<typename SumWithOperator>
static Optional<CalculatedStyleValue::ResolvedType> resolve_sum_type(CalculatedStyleValue::ResolvedType first_type, NonnullOwnPtrVector<SumWithOperator> const& zero_or_more_additional_products)
{
auto type = first_type;
for (auto const& product : zero_or_more_additional_products) {
auto maybe_product_type = product.resolved_type();
if (!maybe_product_type.has_value())
return {};
auto product_type = maybe_product_type.value();
// At + or -, check that both sides have the same type, or that one side is a <number> and the other is an <integer>.
// If both sides are the same type, resolve to that type.
if (product_type == type)
continue;
// If one side is a <number> and the other is an <integer>, resolve to <number>.
if (is_number(type) && is_number(product_type)) {
type = CalculatedStyleValue::ResolvedType::Number;
continue;
}
// FIXME: calc() handles <percentage> by allowing them to pretend to be whatever <dimension> type is allowed at this location.
// Since we can't easily check what that type is, we just allow <percentage> to combine with any other <dimension> type.
if (type == CalculatedStyleValue::ResolvedType::Percentage && is_dimension(product_type)) {
type = product_type;
continue;
}
if (is_dimension(type) && product_type == CalculatedStyleValue::ResolvedType::Percentage)
continue;
return {};
}
return type;
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcSum::resolved_type() const
{
auto maybe_type = first_calc_product->resolved_type();
if (!maybe_type.has_value())
return {};
auto type = maybe_type.value();
return resolve_sum_type(type, zero_or_more_additional_calc_products);
}
// https://www.w3.org/TR/CSS2/visufx.html#value-def-shape
Gfx::FloatRect EdgeRect::resolved(Layout::Node const& layout_node, Gfx::FloatRect border_box) const
{
// In CSS 2.1, the only valid <shape> value is: rect(<top>, <right>, <bottom>, <left>) where
// <top> and <bottom> specify offsets from the top border edge of the box, and <right>, and
// <left> specify offsets from the left border edge of the box.
// The value 'auto' means that a given edge of the clipping region will be the same as the edge
// of the element's generated border box (i.e., 'auto' means the same as '0' for <top> and
// <left>, the same as the used value of the height plus the sum of vertical padding and border
// widths for <bottom>, and the same as the used value of the width plus the sum of the
// horizontal padding and border widths for <right>, such that four 'auto' values result in the
// clipping region being the same as the element's border box).
auto left = border_box.left() + (left_edge.is_auto() ? 0 : left_edge.to_px(layout_node));
auto top = border_box.top() + (top_edge.is_auto() ? 0 : top_edge.to_px(layout_node));
auto right = border_box.left() + (right_edge.is_auto() ? border_box.width() : right_edge.to_px(layout_node));
auto bottom = border_box.top() + (bottom_edge.is_auto() ? border_box.height() : bottom_edge.to_px(layout_node));
return Gfx::FloatRect {
left,
top,
right - left,
bottom - top
};
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcNumberSum::resolved_type() const
{
auto maybe_type = first_calc_number_product->resolved_type();
if (!maybe_type.has_value())
return {};
auto type = maybe_type.value();
return resolve_sum_type(type, zero_or_more_additional_calc_number_products);
}
template<typename ProductWithOperator>
static Optional<CalculatedStyleValue::ResolvedType> resolve_product_type(CalculatedStyleValue::ResolvedType first_type, NonnullOwnPtrVector<ProductWithOperator> const& zero_or_more_additional_values)
{
auto type = first_type;
for (auto const& value : zero_or_more_additional_values) {
auto maybe_value_type = value.resolved_type();
if (!maybe_value_type.has_value())
return {};
auto value_type = maybe_value_type.value();
if (value.op == CalculatedStyleValue::ProductOperation::Multiply) {
// At *, check that at least one side is <number>.
if (!(is_number(type) || is_number(value_type)))
return {};
// If both sides are <integer>, resolve to <integer>.
if (type == CalculatedStyleValue::ResolvedType::Integer && value_type == CalculatedStyleValue::ResolvedType::Integer) {
type = CalculatedStyleValue::ResolvedType::Integer;
} else {
// Otherwise, resolve to the type of the other side.
if (is_number(type))
type = value_type;
}
continue;
} else {
VERIFY(value.op == CalculatedStyleValue::ProductOperation::Divide);
// At /, check that the right side is <number>.
if (!is_number(value_type))
return {};
// If the left side is <integer>, resolve to <number>.
if (type == CalculatedStyleValue::ResolvedType::Integer) {
type = CalculatedStyleValue::ResolvedType::Number;
} else {
// Otherwise, resolve to the type of the left side.
}
// FIXME: Division by zero makes the whole calc() expression invalid.
}
}
return type;
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcProduct::resolved_type() const
{
auto maybe_type = first_calc_value.resolved_type();
if (!maybe_type.has_value())
return {};
auto type = maybe_type.value();
return resolve_product_type(type, zero_or_more_additional_calc_values);
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcSumPartWithOperator::resolved_type() const
{
return value->resolved_type();
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcNumberProduct::resolved_type() const
{
auto maybe_type = first_calc_number_value.resolved_type();
if (!maybe_type.has_value())
return {};
auto type = maybe_type.value();
return resolve_product_type(type, zero_or_more_additional_calc_number_values);
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcNumberProductPartWithOperator::resolved_type() const
{
return value.resolved_type();
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcNumberSumPartWithOperator::resolved_type() const
{
return value->resolved_type();
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcProductPartWithOperator::resolved_type() const
{
return value.visit(
[](CalcValue const& calc_value) {
return calc_value.resolved_type();
},
[](CalcNumberValue const& calc_number_value) {
return calc_number_value.resolved_type();
});
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcValue::resolved_type() const
{
return value.visit(
[](Number const& number) -> Optional<CalculatedStyleValue::ResolvedType> {
return { number.is_integer() ? ResolvedType::Integer : ResolvedType::Number };
},
[](Angle const&) -> Optional<CalculatedStyleValue::ResolvedType> { return { ResolvedType::Angle }; },
[](Frequency const&) -> Optional<CalculatedStyleValue::ResolvedType> { return { ResolvedType::Frequency }; },
[](Length const&) -> Optional<CalculatedStyleValue::ResolvedType> { return { ResolvedType::Length }; },
[](Percentage const&) -> Optional<CalculatedStyleValue::ResolvedType> { return { ResolvedType::Percentage }; },
[](Time const&) -> Optional<CalculatedStyleValue::ResolvedType> { return { ResolvedType::Time }; },
[](NonnullOwnPtr<CalcSum> const& sum) { return sum->resolved_type(); });
}
Optional<CalculatedStyleValue::ResolvedType> CalculatedStyleValue::CalcNumberValue::resolved_type() const
{
return value.visit(
[](Number const& number) -> Optional<CalculatedStyleValue::ResolvedType> {
return { number.is_integer() ? ResolvedType::Integer : ResolvedType::Number };
},
[](NonnullOwnPtr<CalcNumberSum> const& sum) { return sum->resolved_type(); });
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberValue::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
return value.visit(
[&](Number const& number) -> CalculatedStyleValue::CalculationResult {
return CalculatedStyleValue::CalculationResult { number };
},
[&](NonnullOwnPtr<CalcNumberSum> const& sum) -> CalculatedStyleValue::CalculationResult {
return sum->resolve(layout_node, percentage_basis);
});
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcValue::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
return value.visit(
[&](NonnullOwnPtr<CalcSum> const& sum) -> CalculatedStyleValue::CalculationResult {
return sum->resolve(layout_node, percentage_basis);
},
[&](auto const& v) -> CalculatedStyleValue::CalculationResult {
return CalculatedStyleValue::CalculationResult { v };
});
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcSum::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
auto value = first_calc_product->resolve(layout_node, percentage_basis);
for (auto& additional_product : zero_or_more_additional_calc_products) {
auto additional_value = additional_product.resolve(layout_node, percentage_basis);
if (additional_product.op == CalculatedStyleValue::SumOperation::Add)
value.add(additional_value, layout_node, percentage_basis);
else if (additional_product.op == CalculatedStyleValue::SumOperation::Subtract)
value.subtract(additional_value, layout_node, percentage_basis);
else
VERIFY_NOT_REACHED();
}
return value;
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberSum::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
auto value = first_calc_number_product->resolve(layout_node, percentage_basis);
for (auto& additional_product : zero_or_more_additional_calc_number_products) {
auto additional_value = additional_product.resolve(layout_node, percentage_basis);
if (additional_product.op == CSS::CalculatedStyleValue::SumOperation::Add)
value.add(additional_value, layout_node, percentage_basis);
else if (additional_product.op == CalculatedStyleValue::SumOperation::Subtract)
value.subtract(additional_value, layout_node, percentage_basis);
else
VERIFY_NOT_REACHED();
}
return value;
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcProduct::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
auto value = first_calc_value.resolve(layout_node, percentage_basis);
for (auto& additional_value : zero_or_more_additional_calc_values) {
additional_value.value.visit(
[&](CalculatedStyleValue::CalcValue const& calc_value) {
VERIFY(additional_value.op == CalculatedStyleValue::ProductOperation::Multiply);
auto resolved_value = calc_value.resolve(layout_node, percentage_basis);
value.multiply_by(resolved_value, layout_node);
},
[&](CalculatedStyleValue::CalcNumberValue const& calc_number_value) {
VERIFY(additional_value.op == CalculatedStyleValue::ProductOperation::Divide);
auto resolved_calc_number_value = calc_number_value.resolve(layout_node, percentage_basis);
// FIXME: Checking for division by 0 should happen during parsing.
VERIFY(resolved_calc_number_value.value().get<Number>().value() != 0.0f);
value.divide_by(resolved_calc_number_value, layout_node);
});
}
return value;
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberProduct::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
auto value = first_calc_number_value.resolve(layout_node, percentage_basis);
for (auto& additional_number_value : zero_or_more_additional_calc_number_values) {
auto additional_value = additional_number_value.resolve(layout_node, percentage_basis);
if (additional_number_value.op == CalculatedStyleValue::ProductOperation::Multiply)
value.multiply_by(additional_value, layout_node);
else if (additional_number_value.op == CalculatedStyleValue::ProductOperation::Divide)
value.divide_by(additional_value, layout_node);
else
VERIFY_NOT_REACHED();
}
return value;
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcProductPartWithOperator::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
return value.visit(
[&](CalcValue const& calc_value) {
return calc_value.resolve(layout_node, percentage_basis);
},
[&](CalcNumberValue const& calc_number_value) {
return calc_number_value.resolve(layout_node, percentage_basis);
});
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcSumPartWithOperator::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
return value->resolve(layout_node, percentage_basis);
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberProductPartWithOperator::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
return value.resolve(layout_node, percentage_basis);
}
CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberSumPartWithOperator::resolve(Layout::Node const* layout_node, PercentageBasis const& percentage_basis) const
{
return value->resolve(layout_node, percentage_basis);
}
DeprecatedString ColorStyleValue::to_string() const
{
return serialize_a_srgb_value(m_color);
}
bool ColorStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_color == other.as_color().m_color;
}
DeprecatedString ContentStyleValue::to_string() const
{
if (has_alt_text())
return DeprecatedString::formatted("{} / {}", m_content->to_string(), m_alt_text->to_string());
return m_content->to_string();
}
bool ContentStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_content();
if (!m_content->equals(typed_other.m_content))
return false;
if (m_alt_text.is_null() != typed_other.m_alt_text.is_null())
return false;
if (!m_alt_text.is_null())
return m_alt_text->equals(*typed_other.m_alt_text);
return true;
}
float Filter::Blur::resolved_radius(Layout::Node const& node) const
{
// Default value when omitted is 0px.
auto sigma = 0;
if (radius.has_value())
sigma = radius->resolved(node).to_px(node);
// Note: The radius/sigma of the blur needs to be doubled for LibGfx's blur functions.
return sigma * 2;
}
Filter::DropShadow::Resolved Filter::DropShadow::resolved(Layout::Node const& node) const
{
// The default value for omitted values is missing length values set to 0
// and the missing used color is taken from the color property.
return Resolved {
offset_x.resolved(node).to_px(node),
offset_y.resolved(node).to_px(node),
radius.has_value() ? radius->resolved(node).to_px(node) : 0.0f,
color.has_value() ? *color : node.computed_values().color()
};
}
float Filter::HueRotate::angle_degrees() const
{
// Default value when omitted is 0deg.
if (!angle.has_value())
return 0.0f;
return angle->visit([&](Angle const& angle) { return angle.to_degrees(); }, [&](auto) { return 0.0f; });
}
float Filter::Color::resolved_amount() const
{
if (amount.has_value()) {
if (amount->is_percentage())
return amount->percentage().as_fraction();
return amount->number().value();
}
// All color filters (brightness, sepia, etc) have a default amount of 1.
return 1.0f;
}
DeprecatedString FilterValueListStyleValue::to_string() const
{
StringBuilder builder {};
bool first = true;
for (auto& filter_function : filter_value_list()) {
if (!first)
builder.append(' ');
filter_function.visit(
[&](Filter::Blur const& blur) {
builder.append("blur("sv);
if (blur.radius.has_value())
builder.append(blur.radius->to_string());
},
[&](Filter::DropShadow const& drop_shadow) {
builder.appendff("drop-shadow({} {}"sv,
drop_shadow.offset_x, drop_shadow.offset_y);
if (drop_shadow.radius.has_value())
builder.appendff(" {}", drop_shadow.radius->to_string());
if (drop_shadow.color.has_value()) {
builder.append(' ');
serialize_a_srgb_value(builder, *drop_shadow.color);
}
},
[&](Filter::HueRotate const& hue_rotate) {
builder.append("hue-rotate("sv);
if (hue_rotate.angle.has_value()) {
hue_rotate.angle->visit(
[&](Angle const& angle) {
builder.append(angle.to_string());
},
[&](auto&) {
builder.append('0');
});
}
},
[&](Filter::Color const& color) {
builder.appendff("{}(",
[&] {
switch (color.operation) {
case Filter::Color::Operation::Brightness:
return "brightness"sv;
case Filter::Color::Operation::Contrast:
return "contrast"sv;
case Filter::Color::Operation::Grayscale:
return "grayscale"sv;
case Filter::Color::Operation::Invert:
return "invert"sv;
case Filter::Color::Operation::Opacity:
return "opacity"sv;
case Filter::Color::Operation::Saturate:
return "saturate"sv;
case Filter::Color::Operation::Sepia:
return "sepia"sv;
default:
VERIFY_NOT_REACHED();
}
}());
if (color.amount.has_value())
builder.append(color.amount->to_string());
});
builder.append(')');
first = false;
}
return builder.to_string();
}
static bool operator==(Filter::Blur const& a, Filter::Blur const& b)
{
return a.radius == b.radius;
}
static bool operator==(Filter::DropShadow const& a, Filter::DropShadow const& b)
{
return a.offset_x == b.offset_x && a.offset_y == b.offset_y && a.radius == b.radius && a.color == b.color;
}
static bool operator==(Filter::HueRotate::Zero const&, Filter::HueRotate::Zero const&)
{
return true;
}
static bool operator==(Filter::Color const& a, Filter::Color const& b)
{
return a.operation == b.operation && a.amount == b.amount;
}
static bool operator==(Filter::HueRotate const& a, Filter::HueRotate const& b)
{
return a.angle == b.angle;
}
static bool variant_equals(auto const& a, auto const& b)
{
return a.visit([&](auto const& held_value) {
using HeldType = AK::Detail::Decay<decltype(held_value)>;
bool other_holds_same_type = b.template has<HeldType>();
return other_holds_same_type && held_value == b.template get<HeldType>();
});
}
static bool operator==(Filter::HueRotate::AngleOrZero const& a, Filter::HueRotate::AngleOrZero const& b)
{
return variant_equals(a, b);
}
static bool operator==(FilterFunction const& a, FilterFunction const& b)
{
return variant_equals(a, b);
}
bool FilterValueListStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_filter_value_list();
if (m_filter_value_list.size() != typed_other.m_filter_value_list.size())
return false;
for (size_t i = 0; i < m_filter_value_list.size(); i++) {
if (m_filter_value_list[i] != typed_other.m_filter_value_list[i])
return false;
}
return true;
}
DeprecatedString FlexStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {} {}", m_grow->to_string(), m_shrink->to_string(), m_basis->to_string());
}
bool FlexStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_flex();
return m_grow->equals(typed_other.m_grow)
&& m_shrink->equals(typed_other.m_shrink)
&& m_basis->equals(typed_other.m_basis);
}
DeprecatedString FlexFlowStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {}", m_flex_direction->to_string(), m_flex_wrap->to_string());
}
bool FlexFlowStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_flex_flow();
return m_flex_direction->equals(typed_other.m_flex_direction)
&& m_flex_wrap->equals(typed_other.m_flex_wrap);
}
DeprecatedString FontStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {} {} / {} {}", m_font_style->to_string(), m_font_weight->to_string(), m_font_size->to_string(), m_line_height->to_string(), m_font_families->to_string());
}
bool FontStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_font();
return m_font_style->equals(typed_other.m_font_style)
&& m_font_weight->equals(typed_other.m_font_weight)
&& m_font_size->equals(typed_other.m_font_size)
&& m_line_height->equals(typed_other.m_line_height)
&& m_font_families->equals(typed_other.m_font_families);
}
bool FrequencyStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_frequency == other.as_frequency().m_frequency;
}
DeprecatedString GridTrackPlacementShorthandStyleValue::to_string() const
{
if (m_end->grid_track_placement().is_auto())
return DeprecatedString::formatted("{}", m_start->grid_track_placement().to_string());
return DeprecatedString::formatted("{} / {}", m_start->grid_track_placement().to_string(), m_end->grid_track_placement().to_string());
}
bool GridTrackPlacementShorthandStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_grid_track_placement_shorthand();
return m_start->equals(typed_other.m_start)
&& m_end->equals(typed_other.m_end);
}
DeprecatedString GridTrackPlacementStyleValue::to_string() const
{
return m_grid_track_placement.to_string();
}
bool GridTrackPlacementStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_grid_track_placement();
return m_grid_track_placement == typed_other.grid_track_placement();
}
DeprecatedString GridTrackSizeStyleValue::to_string() const
{
return m_grid_track_size_list.to_string();
}
bool GridTrackSizeStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_grid_track_size_list();
return m_grid_track_size_list == typed_other.grid_track_size_list();
}
DeprecatedString IdentifierStyleValue::to_string() const
{
return CSS::string_from_value_id(m_id);
}
bool IdentifierStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_id == other.as_identifier().m_id;
}
bool IdentifierStyleValue::has_color() const
{
switch (m_id) {
case ValueID::Currentcolor:
case ValueID::LibwebLink:
case ValueID::LibwebPaletteActiveLink:
case ValueID::LibwebPaletteActiveWindowBorder1:
case ValueID::LibwebPaletteActiveWindowBorder2:
case ValueID::LibwebPaletteActiveWindowTitle:
case ValueID::LibwebPaletteBase:
case ValueID::LibwebPaletteBaseText:
case ValueID::LibwebPaletteButton:
case ValueID::LibwebPaletteButtonText:
case ValueID::LibwebPaletteDesktopBackground:
case ValueID::LibwebPaletteFocusOutline:
case ValueID::LibwebPaletteHighlightWindowBorder1:
case ValueID::LibwebPaletteHighlightWindowBorder2:
case ValueID::LibwebPaletteHighlightWindowTitle:
case ValueID::LibwebPaletteHoverHighlight:
case ValueID::LibwebPaletteInactiveSelection:
case ValueID::LibwebPaletteInactiveSelectionText:
case ValueID::LibwebPaletteInactiveWindowBorder1:
case ValueID::LibwebPaletteInactiveWindowBorder2:
case ValueID::LibwebPaletteInactiveWindowTitle:
case ValueID::LibwebPaletteLink:
case ValueID::LibwebPaletteMenuBase:
case ValueID::LibwebPaletteMenuBaseText:
case ValueID::LibwebPaletteMenuSelection:
case ValueID::LibwebPaletteMenuSelectionText:
case ValueID::LibwebPaletteMenuStripe:
case ValueID::LibwebPaletteMovingWindowBorder1:
case ValueID::LibwebPaletteMovingWindowBorder2:
case ValueID::LibwebPaletteMovingWindowTitle:
case ValueID::LibwebPaletteRubberBandBorder:
case ValueID::LibwebPaletteRubberBandFill:
case ValueID::LibwebPaletteRuler:
case ValueID::LibwebPaletteRulerActiveText:
case ValueID::LibwebPaletteRulerBorder:
case ValueID::LibwebPaletteRulerInactiveText:
case ValueID::LibwebPaletteSelection:
case ValueID::LibwebPaletteSelectionText:
case ValueID::LibwebPaletteSyntaxComment:
case ValueID::LibwebPaletteSyntaxControlKeyword:
case ValueID::LibwebPaletteSyntaxIdentifier:
case ValueID::LibwebPaletteSyntaxKeyword:
case ValueID::LibwebPaletteSyntaxNumber:
case ValueID::LibwebPaletteSyntaxOperator:
case ValueID::LibwebPaletteSyntaxPreprocessorStatement:
case ValueID::LibwebPaletteSyntaxPreprocessorValue:
case ValueID::LibwebPaletteSyntaxPunctuation:
case ValueID::LibwebPaletteSyntaxString:
case ValueID::LibwebPaletteSyntaxType:
case ValueID::LibwebPaletteTextCursor:
case ValueID::LibwebPaletteThreedHighlight:
case ValueID::LibwebPaletteThreedShadow1:
case ValueID::LibwebPaletteThreedShadow2:
case ValueID::LibwebPaletteVisitedLink:
case ValueID::LibwebPaletteWindow:
case ValueID::LibwebPaletteWindowText:
return true;
default:
return false;
}
}
Color IdentifierStyleValue::to_color(Layout::NodeWithStyle const& node) const
{
if (id() == CSS::ValueID::Currentcolor) {
if (!node.has_style())
return Color::Black;
return node.computed_values().color();
}
auto& document = node.document();
if (id() == CSS::ValueID::LibwebLink)
return document.link_color();
if (!document.page())
return {};
auto palette = document.page()->palette();
switch (id()) {
case CSS::ValueID::LibwebPaletteDesktopBackground:
return palette.color(ColorRole::DesktopBackground);
case CSS::ValueID::LibwebPaletteActiveWindowBorder1:
return palette.color(ColorRole::ActiveWindowBorder1);
case CSS::ValueID::LibwebPaletteActiveWindowBorder2:
return palette.color(ColorRole::ActiveWindowBorder2);
case CSS::ValueID::LibwebPaletteActiveWindowTitle:
return palette.color(ColorRole::ActiveWindowTitle);
case CSS::ValueID::LibwebPaletteInactiveWindowBorder1:
return palette.color(ColorRole::InactiveWindowBorder1);
case CSS::ValueID::LibwebPaletteInactiveWindowBorder2:
return palette.color(ColorRole::InactiveWindowBorder2);
case CSS::ValueID::LibwebPaletteInactiveWindowTitle:
return palette.color(ColorRole::InactiveWindowTitle);
case CSS::ValueID::LibwebPaletteMovingWindowBorder1:
return palette.color(ColorRole::MovingWindowBorder1);
case CSS::ValueID::LibwebPaletteMovingWindowBorder2:
return palette.color(ColorRole::MovingWindowBorder2);
case CSS::ValueID::LibwebPaletteMovingWindowTitle:
return palette.color(ColorRole::MovingWindowTitle);
case CSS::ValueID::LibwebPaletteHighlightWindowBorder1:
return palette.color(ColorRole::HighlightWindowBorder1);
case CSS::ValueID::LibwebPaletteHighlightWindowBorder2:
return palette.color(ColorRole::HighlightWindowBorder2);
case CSS::ValueID::LibwebPaletteHighlightWindowTitle:
return palette.color(ColorRole::HighlightWindowTitle);
case CSS::ValueID::LibwebPaletteMenuStripe:
return palette.color(ColorRole::MenuStripe);
case CSS::ValueID::LibwebPaletteMenuBase:
return palette.color(ColorRole::MenuBase);
case CSS::ValueID::LibwebPaletteMenuBaseText:
return palette.color(ColorRole::MenuBaseText);
case CSS::ValueID::LibwebPaletteMenuSelection:
return palette.color(ColorRole::MenuSelection);
case CSS::ValueID::LibwebPaletteMenuSelectionText:
return palette.color(ColorRole::MenuSelectionText);
case CSS::ValueID::LibwebPaletteWindow:
return palette.color(ColorRole::Window);
case CSS::ValueID::LibwebPaletteWindowText:
return palette.color(ColorRole::WindowText);
case CSS::ValueID::LibwebPaletteButton:
return palette.color(ColorRole::Button);
case CSS::ValueID::LibwebPaletteButtonText:
return palette.color(ColorRole::ButtonText);
case CSS::ValueID::LibwebPaletteBase:
return palette.color(ColorRole::Base);
case CSS::ValueID::LibwebPaletteBaseText:
return palette.color(ColorRole::BaseText);
case CSS::ValueID::LibwebPaletteThreedHighlight:
return palette.color(ColorRole::ThreedHighlight);
case CSS::ValueID::LibwebPaletteThreedShadow1:
return palette.color(ColorRole::ThreedShadow1);
case CSS::ValueID::LibwebPaletteThreedShadow2:
return palette.color(ColorRole::ThreedShadow2);
case CSS::ValueID::LibwebPaletteHoverHighlight:
return palette.color(ColorRole::HoverHighlight);
case CSS::ValueID::LibwebPaletteSelection:
return palette.color(ColorRole::Selection);
case CSS::ValueID::LibwebPaletteSelectionText:
return palette.color(ColorRole::SelectionText);
case CSS::ValueID::LibwebPaletteInactiveSelection:
return palette.color(ColorRole::InactiveSelection);
case CSS::ValueID::LibwebPaletteInactiveSelectionText:
return palette.color(ColorRole::InactiveSelectionText);
case CSS::ValueID::LibwebPaletteRubberBandFill:
return palette.color(ColorRole::RubberBandFill);
case CSS::ValueID::LibwebPaletteRubberBandBorder:
return palette.color(ColorRole::RubberBandBorder);
case CSS::ValueID::LibwebPaletteLink:
return palette.color(ColorRole::Link);
case CSS::ValueID::LibwebPaletteActiveLink:
return palette.color(ColorRole::ActiveLink);
case CSS::ValueID::LibwebPaletteVisitedLink:
return palette.color(ColorRole::VisitedLink);
case CSS::ValueID::LibwebPaletteRuler:
return palette.color(ColorRole::Ruler);
case CSS::ValueID::LibwebPaletteRulerBorder:
return palette.color(ColorRole::RulerBorder);
case CSS::ValueID::LibwebPaletteRulerActiveText:
return palette.color(ColorRole::RulerActiveText);
case CSS::ValueID::LibwebPaletteRulerInactiveText:
return palette.color(ColorRole::RulerInactiveText);
case CSS::ValueID::LibwebPaletteTextCursor:
return palette.color(ColorRole::TextCursor);
case CSS::ValueID::LibwebPaletteFocusOutline:
return palette.color(ColorRole::FocusOutline);
case CSS::ValueID::LibwebPaletteSyntaxComment:
return palette.color(ColorRole::SyntaxComment);
case CSS::ValueID::LibwebPaletteSyntaxNumber:
return palette.color(ColorRole::SyntaxNumber);
case CSS::ValueID::LibwebPaletteSyntaxString:
return palette.color(ColorRole::SyntaxString);
case CSS::ValueID::LibwebPaletteSyntaxType:
return palette.color(ColorRole::SyntaxType);
case CSS::ValueID::LibwebPaletteSyntaxPunctuation:
return palette.color(ColorRole::SyntaxPunctuation);
case CSS::ValueID::LibwebPaletteSyntaxOperator:
return palette.color(ColorRole::SyntaxOperator);
case CSS::ValueID::LibwebPaletteSyntaxKeyword:
return palette.color(ColorRole::SyntaxKeyword);
case CSS::ValueID::LibwebPaletteSyntaxControlKeyword:
return palette.color(ColorRole::SyntaxControlKeyword);
case CSS::ValueID::LibwebPaletteSyntaxIdentifier:
return palette.color(ColorRole::SyntaxIdentifier);
case CSS::ValueID::LibwebPaletteSyntaxPreprocessorStatement:
return palette.color(ColorRole::SyntaxPreprocessorStatement);
case CSS::ValueID::LibwebPaletteSyntaxPreprocessorValue:
return palette.color(ColorRole::SyntaxPreprocessorValue);
default:
return {};
}
}
ImageStyleValue::ImageStyleValue(AK::URL const& url)
: AbstractImageStyleValue(Type::Image)
, m_url(url)
{
}
void ImageStyleValue::load_any_resources(DOM::Document& document)
{
if (resource())
return;
m_document = &document;
auto request = LoadRequest::create_for_url_on_page(m_url, document.page());
set_resource(ResourceLoader::the().load_resource(Resource::Type::Image, request));
}
void ImageStyleValue::resource_did_load()
{
if (!m_document)
return;
// FIXME: Do less than a full repaint if possible?
if (m_document && m_document->browsing_context())
m_document->browsing_context()->set_needs_display();
if (resource()->is_animated() && resource()->frame_count() > 1) {
m_timer = Platform::Timer::create();
m_timer->set_interval(resource()->frame_duration(0));
m_timer->on_timeout = [this] { animate(); };
m_timer->start();
}
}
void ImageStyleValue::animate()
{
m_current_frame_index = (m_current_frame_index + 1) % resource()->frame_count();
auto current_frame_duration = resource()->frame_duration(m_current_frame_index);
if (current_frame_duration != m_timer->interval())
m_timer->restart(current_frame_duration);
if (m_current_frame_index == resource()->frame_count() - 1) {
++m_loops_completed;
if (m_loops_completed > 0 && m_loops_completed == resource()->loop_count())
m_timer->stop();
}
if (on_animate)
on_animate();
}
Gfx::Bitmap const* ImageStyleValue::bitmap(size_t frame_index) const
{
if (!resource())
return nullptr;
return resource()->bitmap(frame_index);
}
DeprecatedString ImageStyleValue::to_string() const
{
return serialize_a_url(m_url.to_string());
}
bool ImageStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_url == other.as_image().m_url;
}
Optional<int> ImageStyleValue::natural_width() const
{
if (auto* b = bitmap(0); b != nullptr)
return b->width();
return {};
}
Optional<int> ImageStyleValue::natural_height() const
{
if (auto* b = bitmap(0); b != nullptr)
return b->height();
return {};
}
void ImageStyleValue::paint(PaintContext& context, Gfx::IntRect const& dest_rect, CSS::ImageRendering image_rendering) const
{
if (auto* b = bitmap(m_current_frame_index); b != nullptr)
context.painter().draw_scaled_bitmap(dest_rect, *b, bitmap(0)->rect(), 1.0f, to_gfx_scaling_mode(image_rendering));
}
static void serialize_color_stop_list(StringBuilder& builder, auto const& color_stop_list)
{
bool first = true;
for (auto const& element : color_stop_list) {
if (!first)
builder.append(", "sv);
if (element.transition_hint.has_value()) {
builder.appendff("{}, "sv, element.transition_hint->value.to_string());
}
serialize_a_srgb_value(builder, element.color_stop.color);
for (auto position : Array { &element.color_stop.position, &element.color_stop.second_position }) {
if (position->has_value())
builder.appendff(" {}"sv, (*position)->to_string());
}
first = false;
}
}
DeprecatedString LinearGradientStyleValue::to_string() const
{
StringBuilder builder;
auto side_or_corner_to_string = [](SideOrCorner value) {
switch (value) {
case SideOrCorner::Top:
return "top"sv;
case SideOrCorner::Bottom:
return "bottom"sv;
case SideOrCorner::Left:
return "left"sv;
case SideOrCorner::Right:
return "right"sv;
case SideOrCorner::TopLeft:
return "top left"sv;
case SideOrCorner::TopRight:
return "top right"sv;
case SideOrCorner::BottomLeft:
return "bottom left"sv;
case SideOrCorner::BottomRight:
return "bottom right"sv;
default:
VERIFY_NOT_REACHED();
}
};
if (m_gradient_type == GradientType::WebKit)
builder.append("-webkit-"sv);
if (is_repeating())
builder.append("repeating-"sv);
builder.append("linear-gradient("sv);
m_direction.visit(
[&](SideOrCorner side_or_corner) {
builder.appendff("{}{}, "sv, m_gradient_type == GradientType::Standard ? "to "sv : ""sv, side_or_corner_to_string(side_or_corner));
},
[&](Angle const& angle) {
builder.appendff("{}, "sv, angle.to_string());
});
serialize_color_stop_list(builder, m_color_stop_list);
builder.append(")"sv);
return builder.to_string();
}
static bool operator==(LinearGradientStyleValue::GradientDirection const& a, LinearGradientStyleValue::GradientDirection const& b)
{
if (a.has<SideOrCorner>() && b.has<SideOrCorner>())
return a.get<SideOrCorner>() == b.get<SideOrCorner>();
if (a.has<Angle>() && b.has<Angle>())
return a.get<Angle>() == b.get<Angle>();
return false;
}
static bool operator==(EdgeRect const& a, EdgeRect const& b)
{
return a.top_edge == b.top_edge && a.right_edge == b.right_edge && a.bottom_edge == b.bottom_edge && a.left_edge == b.left_edge;
}
bool LinearGradientStyleValue::equals(StyleValue const& other_) const
{
if (type() != other_.type())
return false;
auto& other = other_.as_linear_gradient();
return (m_gradient_type == other.m_gradient_type
&& m_repeating == other.m_repeating
&& m_direction == other.m_direction
&& m_color_stop_list == other.m_color_stop_list);
}
float LinearGradientStyleValue::angle_degrees(Gfx::FloatSize const& gradient_size) const
{
auto corner_angle_degrees = [&] {
return static_cast<float>(atan2(gradient_size.height(), gradient_size.width())) * 180 / AK::Pi<float>;
};
return m_direction.visit(
[&](SideOrCorner side_or_corner) {
auto angle = [&] {
switch (side_or_corner) {
case SideOrCorner::Top:
return 0.0f;
case SideOrCorner::Bottom:
return 180.0f;
case SideOrCorner::Left:
return 270.0f;
case SideOrCorner::Right:
return 90.0f;
case SideOrCorner::TopRight:
return corner_angle_degrees();
case SideOrCorner::BottomLeft:
return corner_angle_degrees() + 180.0f;
case SideOrCorner::TopLeft:
return -corner_angle_degrees();
case SideOrCorner::BottomRight:
return -(corner_angle_degrees() + 180.0f);
default:
VERIFY_NOT_REACHED();
}
}();
// Note: For unknowable reasons the angles are opposite on the -webkit- version
if (m_gradient_type == GradientType::WebKit)
return angle + 180.0f;
return angle;
},
[&](Angle const& angle) {
return angle.to_degrees();
});
}
void LinearGradientStyleValue::resolve_for_size(Layout::Node const& node, Gfx::FloatSize const& size) const
{
if (m_resolved.has_value() && m_resolved->size == size)
return;
m_resolved = ResolvedData { Painting::resolve_linear_gradient_data(node, size, *this), size };
}
void LinearGradientStyleValue::paint(PaintContext& context, Gfx::IntRect const& dest_rect, CSS::ImageRendering) const
{
VERIFY(m_resolved.has_value());
Painting::paint_linear_gradient(context, dest_rect, m_resolved->data);
}
Gfx::FloatPoint PositionValue::resolved(Layout::Node const& node, Gfx::FloatRect const& rect) const
{
// Note: A preset + a none default x/y_relative_to is impossible in the syntax (and makes little sense)
float x = horizontal_position.visit(
[&](HorizontalPreset preset) {
return rect.width() * [&] {
switch (preset) {
case HorizontalPreset::Left:
return 0.0f;
case HorizontalPreset::Center:
return 0.5f;
case HorizontalPreset::Right:
return 1.0f;
default:
VERIFY_NOT_REACHED();
}
}();
},
[&](LengthPercentage length_percentage) {
return length_percentage.resolved(node, Length::make_px(rect.width())).to_px(node);
});
float y = vertical_position.visit(
[&](VerticalPreset preset) {
return rect.height() * [&] {
switch (preset) {
case VerticalPreset::Top:
return 0.0f;
case VerticalPreset::Center:
return 0.5f;
case VerticalPreset::Bottom:
return 1.0f;
default:
VERIFY_NOT_REACHED();
}
}();
},
[&](LengthPercentage length_percentage) {
return length_percentage.resolved(node, Length::make_px(rect.height())).to_px(node);
});
if (x_relative_to == HorizontalEdge::Right)
x = rect.width() - x;
if (y_relative_to == VerticalEdge::Bottom)
y = rect.height() - y;
return Gfx::FloatPoint { rect.x() + x, rect.y() + y };
}
void PositionValue::serialize(StringBuilder& builder) const
{
// Note: This means our serialization with simplify any with explicit edges that are just `top left`.
bool has_relative_edges = x_relative_to == HorizontalEdge::Right || y_relative_to == VerticalEdge::Bottom;
if (has_relative_edges)
builder.append(x_relative_to == HorizontalEdge::Left ? "left "sv : "right "sv);
horizontal_position.visit(
[&](HorizontalPreset preset) {
builder.append([&] {
switch (preset) {
case HorizontalPreset::Left:
return "left"sv;
case HorizontalPreset::Center:
return "center"sv;
case HorizontalPreset::Right:
return "right"sv;
default:
VERIFY_NOT_REACHED();
}
}());
},
[&](LengthPercentage length_percentage) {
builder.append(length_percentage.to_string());
});
builder.append(' ');
if (has_relative_edges)
builder.append(y_relative_to == VerticalEdge::Top ? "top "sv : "bottom "sv);
vertical_position.visit(
[&](VerticalPreset preset) {
builder.append([&] {
switch (preset) {
case VerticalPreset::Top:
return "top"sv;
case VerticalPreset::Center:
return "center"sv;
case VerticalPreset::Bottom:
return "bottom"sv;
default:
VERIFY_NOT_REACHED();
}
}());
},
[&](LengthPercentage length_percentage) {
builder.append(length_percentage.to_string());
});
}
bool PositionValue::operator==(PositionValue const& other) const
{
return (
x_relative_to == other.x_relative_to
&& y_relative_to == other.y_relative_to
&& variant_equals(horizontal_position, other.horizontal_position)
&& variant_equals(vertical_position, other.vertical_position));
}
DeprecatedString RadialGradientStyleValue::to_string() const
{
StringBuilder builder;
if (is_repeating())
builder.append("repeating-"sv);
builder.appendff("radial-gradient({} "sv,
m_ending_shape == EndingShape::Circle ? "circle"sv : "ellipse"sv);
m_size.visit(
[&](Extent extent) {
builder.append([&] {
switch (extent) {
case Extent::ClosestCorner:
return "closest-corner"sv;
case Extent::ClosestSide:
return "closest-side"sv;
case Extent::FarthestCorner:
return "farthest-corner"sv;
case Extent::FarthestSide:
return "farthest-side"sv;
default:
VERIFY_NOT_REACHED();
}
}());
},
[&](CircleSize const& circle_size) { builder.append(circle_size.radius.to_string()); },
[&](EllipseSize const& ellipse_size) { builder.appendff("{} {}", ellipse_size.radius_a.to_string(), ellipse_size.radius_b.to_string()); });
if (m_position != PositionValue::center()) {
builder.appendff(" at "sv);
m_position.serialize(builder);
}
builder.append(", "sv);
serialize_color_stop_list(builder, m_color_stop_list);
builder.append(')');
return builder.to_string();
}
Gfx::FloatSize RadialGradientStyleValue::resolve_size(Layout::Node const& node, Gfx::FloatPoint center, Gfx::FloatRect const& size) const
{
auto const side_shape = [&](auto distance_function) {
auto const distance_from = [&](float v, float a, float b, auto distance_function) {
return distance_function(fabs(a - v), fabs(b - v));
};
auto x_dist = distance_from(center.x(), size.left(), size.right(), distance_function);
auto y_dist = distance_from(center.y(), size.top(), size.bottom(), distance_function);
if (m_ending_shape == EndingShape::Circle) {
auto dist = distance_function(x_dist, y_dist);
return Gfx::FloatSize { dist, dist };
} else {
return Gfx::FloatSize { x_dist, y_dist };
}
};
auto const closest_side_shape = [&] {
return side_shape(AK::min<float>);
};
auto const farthest_side_shape = [&] {
return side_shape(AK::max<float>);
};
auto const corner_distance = [&](auto distance_compare, Gfx::FloatPoint& corner) {
auto top_left_distance = size.top_left().distance_from(center);
auto top_right_distance = size.top_right().distance_from(center);
auto bottom_right_distance = size.bottom_right().distance_from(center);
auto bottom_left_distance = size.bottom_left().distance_from(center);
auto distance = top_left_distance;
if (distance_compare(top_right_distance, distance)) {
corner = size.top_right();
distance = top_right_distance;
}
if (distance_compare(bottom_right_distance, distance)) {
corner = size.top_right();
distance = bottom_right_distance;
}
if (distance_compare(bottom_left_distance, distance)) {
corner = size.top_right();
distance = bottom_left_distance;
}
return distance;
};
auto const closest_corner_distance = [&](Gfx::FloatPoint& corner) {
return corner_distance([](float a, float b) { return a < b; }, corner);
};
auto const farthest_corner_distance = [&](Gfx::FloatPoint& corner) {
return corner_distance([](float a, float b) { return a > b; }, corner);
};
auto const corner_shape = [&](auto corner_distance, auto get_shape) {
Gfx::FloatPoint corner {};
auto distance = corner_distance(corner);
if (m_ending_shape == EndingShape::Ellipse) {
auto shape = get_shape();
auto aspect_ratio = shape.width() / shape.height();
auto p = corner - center;
auto radius_a = AK::sqrt(p.y() * p.y() * aspect_ratio * aspect_ratio + p.x() * p.x());
auto radius_b = radius_a / aspect_ratio;
return Gfx::FloatSize { radius_a, radius_b };
}
return Gfx::FloatSize { distance, distance };
};
// https://w3c.github.io/csswg-drafts/css-images/#radial-gradient-syntax
auto resolved_size = m_size.visit(
[&](Extent extent) {
switch (extent) {
case Extent::ClosestSide:
// The ending shape is sized so that it exactly meets the side of the gradient box closest to the gradient’s center.
// If the shape is an ellipse, it exactly meets the closest side in each dimension.
return closest_side_shape();
case Extent::ClosestCorner:
// The ending shape is sized so that it passes through the corner of the gradient box closest to the gradient’s center.
// If the shape is an ellipse, the ending shape is given the same aspect-ratio it would have if closest-side were specified
return corner_shape(closest_corner_distance, closest_side_shape);
case Extent::FarthestCorner:
// Same as closest-corner, except the ending shape is sized based on the farthest corner.
// If the shape is an ellipse, the ending shape is given the same aspect ratio it would have if farthest-side were specified.
return corner_shape(farthest_corner_distance, farthest_side_shape);
case Extent::FarthestSide:
// Same as closest-side, except the ending shape is sized based on the farthest side(s).
return farthest_side_shape();
default:
VERIFY_NOT_REACHED();
}
},
[&](CircleSize const& circle_size) {
auto radius = circle_size.radius.to_px(node);
return Gfx::FloatSize { radius, radius };
},
[&](EllipseSize const& ellipse_size) {
auto radius_a = ellipse_size.radius_a.resolved(node, CSS::Length::make_px(size.width())).to_px(node);
auto radius_b = ellipse_size.radius_b.resolved(node, CSS::Length::make_px(size.height())).to_px(node);
return Gfx::FloatSize { radius_a, radius_b };
});
// Handle degenerate cases
// https://w3c.github.io/csswg-drafts/css-images/#degenerate-radials
constexpr auto arbitrary_small_number = 1e-10;
constexpr auto arbitrary_large_number = 1e10;
// If the ending shape is a circle with zero radius:
if (m_ending_shape == EndingShape::Circle && resolved_size.is_empty()) {
// Render as if the ending shape was a circle whose radius was an arbitrary very small number greater than zero.
// This will make the gradient continue to look like a circle.
return Gfx::FloatSize { arbitrary_small_number, arbitrary_small_number };
}
// If the ending shape has zero width (regardless of the height):
if (resolved_size.width() <= 0) {
// Render as if the ending shape was an ellipse whose height was an arbitrary very large number
// and whose width was an arbitrary very small number greater than zero.
// This will make the gradient look similar to a horizontal linear gradient that is mirrored across the center of the ellipse.
// It also means that all color-stop positions specified with a percentage resolve to 0px.
return Gfx::FloatSize { arbitrary_small_number, arbitrary_large_number };
}
// Otherwise, if the ending shape has zero height:
if (resolved_size.height() <= 0) {
// Render as if the ending shape was an ellipse whose width was an arbitrary very large number and whose height
// was an arbitrary very small number greater than zero. This will make the gradient look like a solid-color image equal
// to the color of the last color-stop, or equal to the average color of the gradient if it’s repeating.
return Gfx::FloatSize { arbitrary_large_number, arbitrary_small_number };
}
return resolved_size;
}
void RadialGradientStyleValue::resolve_for_size(Layout::Node const& node, Gfx::FloatSize const& paint_size) const
{
Gfx::FloatRect gradient_box { { 0, 0 }, paint_size };
auto center = m_position.resolved(node, gradient_box);
auto gradient_size = resolve_size(node, center, gradient_box);
if (m_resolved.has_value() && m_resolved->gradient_size == gradient_size)
return;
m_resolved = ResolvedData {
Painting::resolve_radial_gradient_data(node, gradient_size, *this),
gradient_size,
center,
};
}
bool RadialGradientStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto& other_gradient = other.as_radial_gradient();
return (m_ending_shape == other_gradient.m_ending_shape
&& variant_equals(m_size, other_gradient.m_size)
&& m_position == other_gradient.m_position
&& m_color_stop_list == other_gradient.m_color_stop_list);
}
void RadialGradientStyleValue::paint(PaintContext& context, Gfx::IntRect const& dest_rect, CSS::ImageRendering) const
{
VERIFY(m_resolved.has_value());
Painting::paint_radial_gradient(context, dest_rect, m_resolved->data, m_resolved->center.to_rounded<int>(), m_resolved->gradient_size);
}
DeprecatedString ConicGradientStyleValue::to_string() const
{
StringBuilder builder;
if (is_repeating())
builder.append("repeating-"sv);
builder.append("conic-gradient("sv);
bool has_from_angle = false;
bool has_at_position = false;
if ((has_from_angle = m_from_angle.to_degrees() != 0))
builder.appendff("from {}", m_from_angle.to_string());
if ((has_at_position = m_position != PositionValue::center())) {
if (has_from_angle)
builder.append(' ');
builder.appendff("at "sv);
m_position.serialize(builder);
}
if (has_from_angle || has_at_position)
builder.append(", "sv);
serialize_color_stop_list(builder, m_color_stop_list);
builder.append(')');
return builder.to_string();
}
void ConicGradientStyleValue::resolve_for_size(Layout::Node const& node, Gfx::FloatSize const& size) const
{
if (!m_resolved.has_value())
m_resolved = ResolvedData { Painting::resolve_conic_gradient_data(node, *this), {} };
m_resolved->position = m_position.resolved(node, Gfx::FloatRect { { 0, 0 }, size });
}
void ConicGradientStyleValue::paint(PaintContext& context, Gfx::IntRect const& dest_rect, CSS::ImageRendering) const
{
VERIFY(m_resolved.has_value());
Painting::paint_conic_gradient(context, dest_rect, m_resolved->data, m_resolved->position.to_rounded<int>());
}
bool ConicGradientStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto& other_gradient = other.as_conic_gradient();
return (m_from_angle == other_gradient.m_from_angle
&& m_position == other_gradient.m_position
&& m_color_stop_list == other_gradient.m_color_stop_list
&& m_repeating == other_gradient.m_repeating);
}
float ConicGradientStyleValue::angle_degrees() const
{
return m_from_angle.to_degrees();
}
bool InheritStyleValue::equals(StyleValue const& other) const
{
return type() == other.type();
}
bool InitialStyleValue::equals(StyleValue const& other) const
{
return type() == other.type();
}
bool LengthStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_length == other.as_length().m_length;
}
DeprecatedString ListStyleStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {} {}", m_position->to_string(), m_image->to_string(), m_style_type->to_string());
}
bool ListStyleStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_list_style();
return m_position->equals(typed_other.m_position)
&& m_image->equals(typed_other.m_image)
&& m_style_type->equals(typed_other.m_style_type);
}
DeprecatedString NumericStyleValue::to_string() const
{
return m_value.visit(
[](float value) {
return DeprecatedString::formatted("{}", value);
},
[](i64 value) {
return DeprecatedString::formatted("{}", value);
});
}
bool NumericStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
if (has_integer() != other.has_integer())
return false;
if (has_integer())
return m_value.get<i64>() == other.as_numeric().m_value.get<i64>();
return m_value.get<float>() == other.as_numeric().m_value.get<float>();
}
DeprecatedString OverflowStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {}", m_overflow_x->to_string(), m_overflow_y->to_string());
}
bool OverflowStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_overflow();
return m_overflow_x->equals(typed_other.m_overflow_x)
&& m_overflow_y->equals(typed_other.m_overflow_y);
}
DeprecatedString PercentageStyleValue::to_string() const
{
return m_percentage.to_string();
}
bool PercentageStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_percentage == other.as_percentage().m_percentage;
}
DeprecatedString PositionStyleValue::to_string() const
{
auto to_string = [](PositionEdge edge) {
switch (edge) {
case PositionEdge::Left:
return "left";
case PositionEdge::Right:
return "right";
case PositionEdge::Top:
return "top";
case PositionEdge::Bottom:
return "bottom";
}
VERIFY_NOT_REACHED();
};
return DeprecatedString::formatted("{} {} {} {}", to_string(m_edge_x), m_offset_x.to_string(), to_string(m_edge_y), m_offset_y.to_string());
}
bool PositionStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_position();
return m_edge_x == typed_other.m_edge_x
&& m_offset_x == typed_other.m_offset_x
&& m_edge_y == typed_other.m_edge_y
&& m_offset_y == typed_other.m_offset_y;
}
DeprecatedString RectStyleValue::to_string() const
{
return DeprecatedString::formatted("rect({} {} {} {})", m_rect.top_edge, m_rect.right_edge, m_rect.bottom_edge, m_rect.left_edge);
}
bool RectStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_rect();
return m_rect == typed_other.rect();
}
bool ResolutionStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_resolution == other.as_resolution().m_resolution;
}
DeprecatedString ShadowStyleValue::to_string() const
{
StringBuilder builder;
builder.appendff("{} {} {} {} {}", m_color.to_string(), m_offset_x.to_string(), m_offset_y.to_string(), m_blur_radius.to_string(), m_spread_distance.to_string());
if (m_placement == ShadowPlacement::Inner)
builder.append(" inset"sv);
return builder.to_string();
}
bool ShadowStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_shadow();
return m_color == typed_other.m_color
&& m_offset_x == typed_other.m_offset_x
&& m_offset_y == typed_other.m_offset_y
&& m_blur_radius == typed_other.m_blur_radius
&& m_spread_distance == typed_other.m_spread_distance
&& m_placement == typed_other.m_placement;
}
bool StringStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_string == other.as_string().m_string;
}
DeprecatedString TextDecorationStyleValue::to_string() const
{
return DeprecatedString::formatted("{} {} {} {}", m_line->to_string(), m_thickness->to_string(), m_style->to_string(), m_color->to_string());
}
bool TextDecorationStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_text_decoration();
return m_line->equals(typed_other.m_line)
&& m_thickness->equals(typed_other.m_thickness)
&& m_style->equals(typed_other.m_style)
&& m_color->equals(typed_other.m_color);
}
bool TimeStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_time == other.as_time().m_time;
}
DeprecatedString TransformationStyleValue::to_string() const
{
StringBuilder builder;
builder.append(CSS::to_string(m_transform_function));
builder.append('(');
builder.join(", "sv, m_values);
builder.append(')');
return builder.to_string();
}
bool TransformationStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_transformation();
if (m_transform_function != typed_other.m_transform_function)
return false;
if (m_values.size() != typed_other.m_values.size())
return false;
for (size_t i = 0; i < m_values.size(); ++i) {
if (!m_values[i].equals(typed_other.m_values[i]))
return false;
}
return true;
}
DeprecatedString UnresolvedStyleValue::to_string() const
{
StringBuilder builder;
for (auto& value : m_values)
builder.append(value.to_string());
return builder.to_string();
}
bool UnresolvedStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
// This is a case where comparing the strings actually makes sense.
return to_string() == other.to_string();
}
bool UnsetStyleValue::equals(StyleValue const& other) const
{
return type() == other.type();
}
DeprecatedString StyleValueList::to_string() const
{
DeprecatedString separator = "";
switch (m_separator) {
case Separator::Space:
separator = " ";
break;
case Separator::Comma:
separator = ", ";
break;
default:
VERIFY_NOT_REACHED();
}
return DeprecatedString::join(separator, m_values);
}
bool StyleValueList::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_value_list();
if (m_separator != typed_other.m_separator)
return false;
if (m_values.size() != typed_other.m_values.size())
return false;
for (size_t i = 0; i < m_values.size(); ++i) {
if (!m_values[i].equals(typed_other.m_values[i]))
return false;
}
return true;
}
NonnullRefPtr<ColorStyleValue> ColorStyleValue::create(Color color)
{
if (color.value() == 0) {
static auto transparent = adopt_ref(*new ColorStyleValue(color));
return transparent;
}
if (color == Color::from_rgb(0x000000)) {
static auto black = adopt_ref(*new ColorStyleValue(color));
return black;
}
if (color == Color::from_rgb(0xffffff)) {
static auto white = adopt_ref(*new ColorStyleValue(color));
return white;
}
return adopt_ref(*new ColorStyleValue(color));
}
NonnullRefPtr<GridTrackPlacementStyleValue> GridTrackPlacementStyleValue::create(CSS::GridTrackPlacement grid_track_placement)
{
return adopt_ref(*new GridTrackPlacementStyleValue(grid_track_placement));
}
NonnullRefPtr<GridTrackSizeStyleValue> GridTrackSizeStyleValue::create(CSS::GridTrackSizeList grid_track_size_list)
{
return adopt_ref(*new GridTrackSizeStyleValue(grid_track_size_list));
}
NonnullRefPtr<GridTrackSizeStyleValue> GridTrackSizeStyleValue::make_auto()
{
return adopt_ref(*new GridTrackSizeStyleValue(CSS::GridTrackSizeList()));
}
NonnullRefPtr<RectStyleValue> RectStyleValue::create(EdgeRect rect)
{
return adopt_ref(*new RectStyleValue(rect));
}
NonnullRefPtr<LengthStyleValue> LengthStyleValue::create(Length const& length)
{
if (length.is_auto()) {
static auto value = adopt_ref(*new LengthStyleValue(CSS::Length::make_auto()));
return value;
}
if (length.is_px()) {
if (length.raw_value() == 0) {
static auto value = adopt_ref(*new LengthStyleValue(CSS::Length::make_px(0)));
return value;
}
if (length.raw_value() == 1) {
static auto value = adopt_ref(*new LengthStyleValue(CSS::Length::make_px(1)));
return value;
}
}
return adopt_ref(*new LengthStyleValue(length));
}
static Optional<CSS::Length> absolutized_length(CSS::Length const& length, Gfx::IntRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, float font_size, float root_font_size)
{
if (length.is_px())
return {};
if (length.is_absolute() || length.is_relative()) {
auto px = length.to_px(viewport_rect, font_metrics, font_size, root_font_size);
return CSS::Length::make_px(px);
}
return {};
}
NonnullRefPtr<StyleValue> StyleValue::absolutized(Gfx::IntRect const&, Gfx::FontPixelMetrics const&, float, float) const
{
return *this;
}
NonnullRefPtr<StyleValue> LengthStyleValue::absolutized(Gfx::IntRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, float font_size, float root_font_size) const
{
if (auto length = absolutized_length(m_length, viewport_rect, font_metrics, font_size, root_font_size); length.has_value())
return LengthStyleValue::create(length.release_value());
return *this;
}
NonnullRefPtr<StyleValue> ShadowStyleValue::absolutized(Gfx::IntRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, float font_size, float root_font_size) const
{
auto absolutized_offset_x = absolutized_length(m_offset_x, viewport_rect, font_metrics, font_size, root_font_size).value_or(m_offset_x);
auto absolutized_offset_y = absolutized_length(m_offset_y, viewport_rect, font_metrics, font_size, root_font_size).value_or(m_offset_y);
auto absolutized_blur_radius = absolutized_length(m_blur_radius, viewport_rect, font_metrics, font_size, root_font_size).value_or(m_blur_radius);
auto absolutized_spread_distance = absolutized_length(m_spread_distance, viewport_rect, font_metrics, font_size, root_font_size).value_or(m_spread_distance);
return ShadowStyleValue::create(m_color, absolutized_offset_x, absolutized_offset_y, absolutized_blur_radius, absolutized_spread_distance, m_placement);
}
NonnullRefPtr<StyleValue> BorderRadiusStyleValue::absolutized(Gfx::IntRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, float font_size, float root_font_size) const
{
if (m_horizontal_radius.is_percentage() && m_vertical_radius.is_percentage())
return *this;
auto absolutized_horizontal_radius = m_horizontal_radius;
auto absolutized_vertical_radius = m_vertical_radius;
if (!m_horizontal_radius.is_percentage())
absolutized_horizontal_radius = absolutized_length(m_horizontal_radius.length(), viewport_rect, font_metrics, font_size, root_font_size).value_or(m_horizontal_radius.length());
if (!m_vertical_radius.is_percentage())
absolutized_vertical_radius = absolutized_length(m_vertical_radius.length(), viewport_rect, font_metrics, font_size, root_font_size).value_or(m_vertical_radius.length());
return BorderRadiusStyleValue::create(absolutized_horizontal_radius, absolutized_vertical_radius);
}
bool CalculatedStyleValue::contains_percentage() const
{
return m_expression->contains_percentage();
}
bool CalculatedStyleValue::CalcSum::contains_percentage() const
{
if (first_calc_product->contains_percentage())
return true;
for (auto& part : zero_or_more_additional_calc_products) {
if (part.contains_percentage())
return true;
}
return false;
}
bool CalculatedStyleValue::CalcSumPartWithOperator::contains_percentage() const
{
return value->contains_percentage();
}
bool CalculatedStyleValue::CalcProduct::contains_percentage() const
{
if (first_calc_value.contains_percentage())
return true;
for (auto& part : zero_or_more_additional_calc_values) {
if (part.contains_percentage())
return true;
}
return false;
}
bool CalculatedStyleValue::CalcProductPartWithOperator::contains_percentage() const
{
return value.visit(
[](CalcValue const& value) { return value.contains_percentage(); },
[](CalcNumberValue const&) { return false; });
}
bool CalculatedStyleValue::CalcValue::contains_percentage() const
{
return value.visit(
[](Percentage const&) { return true; },
[](NonnullOwnPtr<CalcSum> const& sum) { return sum->contains_percentage(); },
[](auto const&) { return false; });
}
bool calculated_style_value_contains_percentage(CalculatedStyleValue const& value)
{
return value.contains_percentage();
}
}
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