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ladybird/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
Andreas Kling c59ab7cc8b LibWeb: Make StyleValue absolutization non-destructive 
Instead of awkwardly visiting and mutating lengths inside StyleValues,
we now simply create a new StyleValue instead.

This fixes an issue where inherited relative lengths could get
absolutized using a parent as reference, and then not having the correct
values when used in a child context.
2022-02-26 01:35:25 +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>
namespace Web::CSS {
StyleValue::StyleValue(Type type)
: m_type(type)
{
}
StyleValue::~StyleValue()
{
}
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);
}
BoxShadowStyleValue const& StyleValue::as_box_shadow() const
{
VERIFY(is_box_shadow());
return static_cast<BoxShadowStyleValue 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);
}
ContentStyleValue const& StyleValue::as_content() const
{
VERIFY(is_content());
return static_cast<ContentStyleValue 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);
}
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);
}
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);
}
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());
}
String BackgroundStyleValue::to_string() const
{
if (m_layer_count == 1) {
return String::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(", ");
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();
}
String BackgroundRepeatStyleValue::to_string() const
{
return String::formatted("{} {}", CSS::to_string(m_repeat_x), CSS::to_string(m_repeat_y));
}
String BackgroundSizeStyleValue::to_string() const
{
return String::formatted("{} {}", m_size_x.to_string(), m_size_y.to_string());
}
String BorderStyleValue::to_string() const
{
return String::formatted("{} {} {}", m_border_width->to_string(), m_border_style->to_string(), m_border_color->to_string());
}
String BorderRadiusStyleValue::to_string() const
{
return String::formatted("{} / {}", m_horizontal_radius.to_string(), m_vertical_radius.to_string());
}
String BoxShadowStyleValue::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 == BoxShadowPlacement::Inner)
builder.append(" inset");
return builder.to_string();
}
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 {
.is_integer = number.is_integer && other_number.is_integer,
.value = number.value + other_number.value
};
} else {
m_value = Number {
.is_integer = number.is_integer && other_number.is_integer,
.value = number.value - other_number.value
};
}
},
[&](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
new_value.subtract(*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) {
auto other_number = other.m_value.get<Number>();
m_value = Number {
.is_integer = number.is_integer && other_number.is_integer,
.value = number.value * other_number.value
};
} 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 {
.is_integer = false,
.value = 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 };
});
}
String CalculatedStyleValue::to_string() const
{
return String::formatted("calc({})", m_expression->to_string());
}
String CalculatedStyleValue::CalcNumberValue::to_string() const
{
return value.visit(
[](Number const& number) { return String::number(number.value); },
[](NonnullOwnPtr<CalcNumberSum> const& sum) { return String::formatted("({})", sum->to_string()); });
}
String CalculatedStyleValue::CalcValue::to_string() const
{
return value.visit(
[](Number const& number) { return String::number(number.value); },
[](NonnullOwnPtr<CalcSum> const& sum) { return String::formatted("({})", sum->to_string()); },
[](auto const& v) { return v.to_string(); });
}
String 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();
}
String 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();
}
String 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();
}
String CalculatedStyleValue::CalcSumPartWithOperator::to_string() const
{
return String::formatted(" {} {}", op == SumOperation::Add ? "+"sv : "-"sv, value->to_string());
}
String 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 String::formatted(" {} {}", op == ProductOperation::Multiply ? "*"sv : "/"sv, value_string);
}
String 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();
}
String CalculatedStyleValue::CalcNumberProductPartWithOperator::to_string() const
{
return String::formatted(" {} {}", op == ProductOperation::Multiply ? "*"sv : "/"sv, value.to_string());
}
String CalculatedStyleValue::CalcNumberSumPartWithOperator::to_string() const
{
return String::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<AnglePercentage> 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<AnglePercentage> {
return angle;
},
[&](Percentage const& percentage) -> Optional<AnglePercentage> {
return percentage;
},
[&](auto const&) -> Optional<AnglePercentage> {
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<FrequencyPercentage> 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<FrequencyPercentage> {
return frequency;
},
[&](Percentage const& percentage) -> Optional<FrequencyPercentage> {
return percentage;
},
[&](auto const&) -> Optional<FrequencyPercentage> {
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<LengthPercentage> 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<LengthPercentage> {
return length;
},
[&](Percentage const& percentage) -> Optional<LengthPercentage> {
return percentage;
},
[&](auto const&) -> Optional<LengthPercentage> {
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<TimePercentage> 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<TimePercentage> {
return time;
},
[&](Percentage const& percentage) -> Optional<TimePercentage> {
return percentage;
},
[&](auto const&) -> Optional<TimePercentage> {
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 lroundf(result.value().get<Number>().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);
}
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);
}
// https://www.w3.org/TR/css-color-4/#serializing-sRGB-values
String ColorStyleValue::to_string() const
{
if (m_color.alpha() == 1)
return String::formatted("rgb({}, {}, {})", m_color.red(), m_color.green(), m_color.blue());
return String::formatted("rgba({}, {}, {}, {})", m_color.red(), m_color.green(), m_color.blue(), (float)(m_color.alpha()) / 255.0f);
}
String CombinedBorderRadiusStyleValue::to_string() const
{
return String::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());
}
String ContentStyleValue::to_string() const
{
if (has_alt_text())
return String::formatted("{} / {}", m_content->to_string(), m_alt_text->to_string());
return m_content->to_string();
}
String FlexStyleValue::to_string() const
{
return String::formatted("{} {} {}", m_grow->to_string(), m_shrink->to_string(), m_basis->to_string());
}
String FlexFlowStyleValue::to_string() const
{
return String::formatted("{} {}", m_flex_direction->to_string(), m_flex_wrap->to_string());
}
String FontStyleValue::to_string() const
{
return String::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());
}
String IdentifierStyleValue::to_string() const
{
return CSS::string_from_value_id(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();
VERIFY(document.page());
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)
: StyleValue(Type::Image)
, m_url(url)
{
}
void ImageStyleValue::load_bitmap(DOM::Document& document)
{
if (m_bitmap)
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;
m_bitmap = resource()->bitmap();
// FIXME: Do less than a full repaint if possible?
if (m_document && m_document->browsing_context())
m_document->browsing_context()->set_needs_display({});
}
String ImageStyleValue::to_string() const
{
return serialize_a_url(m_url.to_string());
}
String ListStyleStyleValue::to_string() const
{
return String::formatted("{} {} {}", m_position->to_string(), m_image->to_string(), m_style_type->to_string());
}
String NumericStyleValue::to_string() const
{
return m_value.visit(
[](float value) {
return String::formatted("{}", value);
},
[](i64 value) {
return String::formatted("{}", value);
});
}
String OverflowStyleValue::to_string() const
{
return String::formatted("{} {}", m_overflow_x->to_string(), m_overflow_y->to_string());
}
String PercentageStyleValue::to_string() const
{
return m_percentage.to_string();
}
String 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 String::formatted("{} {} {} {}", to_string(m_edge_x), m_offset_x.to_string(), to_string(m_edge_y), m_offset_y.to_string());
}
String TextDecorationStyleValue::to_string() const
{
return String::formatted("{} {} {}", m_line->to_string(), m_style->to_string(), m_color->to_string());
}
String TransformationStyleValue::to_string() const
{
StringBuilder builder;
switch (m_transform_function) {
case TransformFunction::TranslateY:
builder.append("translateY");
break;
default:
VERIFY_NOT_REACHED();
}
builder.append('(');
builder.join(", ", m_values);
builder.append(')');
return builder.to_string();
}
String UnresolvedStyleValue::to_string() const
{
StringBuilder builder;
for (auto& value : m_values)
builder.append(value.to_string());
return builder.to_string();
}
String StyleValueList::to_string() const
{
String separator = "";
switch (m_separator) {
case Separator::Space:
separator = " ";
break;
case Separator::Comma:
separator = ", ";
break;
default:
VERIFY_NOT_REACHED();
}
return String::join(separator, m_values);
}
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<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::FontMetrics 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::FontMetrics const&, float, float) const
{
return *this;
}
NonnullRefPtr<StyleValue> LengthStyleValue::absolutized(Gfx::IntRect const& viewport_rect, Gfx::FontMetrics 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> BoxShadowStyleValue::absolutized(Gfx::IntRect const& viewport_rect, Gfx::FontMetrics 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 BoxShadowStyleValue::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::FontMetrics 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);
}
}
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