RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-10-31 01:12:44 +00:00
Code Issues Activity Actions
serenity/Userland/Libraries/LibWeb/CSS/StyleValue.cpp

2732 lines
102 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
*
* 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);
}
GridAreaShorthandStyleValue const& StyleValue::as_grid_area_shorthand() const
{
VERIFY(is_grid_area_shorthand());
return static_cast<GridAreaShorthandStyleValue const&>(*this);
}
GridTemplateAreaStyleValue const& StyleValue::as_grid_template_area() const
{
VERIFY(is_grid_template_area());
return static_cast<GridTemplateAreaStyleValue 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());
}
ErrorOr<String> BackgroundStyleValue::to_string() const
{
if (m_layer_count == 1) {
return String::formatted("{} {} {} {} {} {} {} {}", TRY(m_color->to_string()), TRY(m_image->to_string()), TRY(m_position->to_string()), TRY(m_size->to_string()), TRY(m_repeat->to_string()), TRY(m_attachment->to_string()), TRY(m_origin->to_string()), TRY(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)
TRY(builder.try_append(", "sv));
if (i == m_layer_count - 1)
TRY(builder.try_appendff("{} ", TRY(m_color->to_string())));
TRY(builder.try_appendff("{} {} {} {} {} {} {}", TRY(get_layer_value_string(m_image, i)), TRY(get_layer_value_string(m_position, i)), TRY(get_layer_value_string(m_size, i)), TRY(get_layer_value_string(m_repeat, i)), TRY(get_layer_value_string(m_attachment, i)), TRY(get_layer_value_string(m_origin, i)), TRY(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);
}
ErrorOr<String> BackgroundRepeatStyleValue::to_string() const
{
return String::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;
}
ErrorOr<String> BackgroundSizeStyleValue::to_string() const
{
return String::formatted("{} {}", TRY(m_size_x.to_string()), TRY(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;
}
ErrorOr<String> BorderStyleValue::to_string() const
{
return String::formatted("{} {} {}", TRY(m_border_width->to_string()), TRY(m_border_style->to_string()), TRY(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);
}
ErrorOr<String> BorderRadiusStyleValue::to_string() const
{
if (m_horizontal_radius == m_vertical_radius)
return m_horizontal_radius.to_string();
return String::formatted("{} / {}", TRY(m_horizontal_radius.to_string()), TRY(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;
}
ErrorOr<String> BorderRadiusShorthandStyleValue::to_string() const
{
return String::formatted("{} {} {} {} / {} {} {} {}", TRY(m_top_left->horizontal_radius().to_string()), TRY(m_top_right->horizontal_radius().to_string()), TRY(m_bottom_right->horizontal_radius().to_string()), TRY(m_bottom_left->horizontal_radius().to_string()), TRY(m_top_left->vertical_radius().to_string()), TRY(m_top_right->vertical_radius().to_string()), TRY(m_bottom_right->vertical_radius().to_string()), TRY(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 };
});
}
ErrorOr<String> CalculatedStyleValue::to_string() const
{
return String::formatted("calc({})", TRY(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().release_value_but_fixme_should_propagate_errors() == other.to_string().release_value_but_fixme_should_propagate_errors();
}
ErrorOr<String> CalculatedStyleValue::CalcNumberValue::to_string() const
{
return value.visit(
[](Number const& number) -> ErrorOr<String> { return String::number(number.value()); },
[](NonnullOwnPtr<CalcNumberSum> const& sum) -> ErrorOr<String> { return String::formatted("({})", TRY(sum->to_string())); });
}
ErrorOr<String> CalculatedStyleValue::CalcValue::to_string() const
{
return value.visit(
[](Number const& number) -> ErrorOr<String> { return String::number(number.value()); },
[](NonnullOwnPtr<CalcSum> const& sum) -> ErrorOr<String> { return String::formatted("({})", TRY(sum->to_string())); },
[](auto const& v) -> ErrorOr<String> { return v.to_string(); });
}
ErrorOr<String> CalculatedStyleValue::CalcSum::to_string() const
{
StringBuilder builder;
TRY(builder.try_append(TRY(first_calc_product->to_string())));
for (auto const& item : zero_or_more_additional_calc_products)
TRY(builder.try_append(TRY(item.to_string())));
return builder.to_string();
}
ErrorOr<String> CalculatedStyleValue::CalcNumberSum::to_string() const
{
StringBuilder builder;
TRY(builder.try_append(TRY(first_calc_number_product->to_string())));
for (auto const& item : zero_or_more_additional_calc_number_products)
TRY(builder.try_append(TRY(item.to_string())));
return builder.to_string();
}
ErrorOr<String> CalculatedStyleValue::CalcProduct::to_string() const
{
StringBuilder builder;
TRY(builder.try_append(TRY(first_calc_value.to_string())));
for (auto const& item : zero_or_more_additional_calc_values)
TRY(builder.try_append(TRY(item.to_string())));
return builder.to_string();
}
ErrorOr<String> CalculatedStyleValue::CalcSumPartWithOperator::to_string() const
{
return String::formatted(" {} {}", op == SumOperation::Add ? "+"sv : "-"sv, TRY(value->to_string()));
}
ErrorOr<String> CalculatedStyleValue::CalcProductPartWithOperator::to_string() const
{
auto value_string = TRY(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);
}
ErrorOr<String> CalculatedStyleValue::CalcNumberProduct::to_string() const
{
StringBuilder builder;
TRY(builder.try_append(TRY(first_calc_number_value.to_string())));
for (auto const& item : zero_or_more_additional_calc_number_values)
TRY(builder.try_append(TRY(item.to_string())));
return builder.to_string();
}
ErrorOr<String> CalculatedStyleValue::CalcNumberProductPartWithOperator::to_string() const
{
return String::formatted(" {} {}", op == ProductOperation::Multiply ? "*"sv : "/"sv, TRY(value.to_string()));
}
ErrorOr<String> CalculatedStyleValue::CalcNumberSumPartWithOperator::to_string() const
{
return String::formatted(" {} {}", op == SumOperation::Add ? "+"sv : "-"sv, TRY(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)).value();
auto top = border_box.top() + (top_edge.is_auto() ? 0 : top_edge.to_px(layout_node)).value();
auto right = border_box.left() + (right_edge.is_auto() ? border_box.width() : right_edge.to_px(layout_node)).value();
auto bottom = border_box.top() + (bottom_edge.is_auto() ? border_box.height() : bottom_edge.to_px(layout_node)).value();
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);
}
ErrorOr<String> 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;
}
ErrorOr<String> ContentStyleValue::to_string() const
{
if (has_alt_text())
return String::formatted("{} / {}", TRY(m_content->to_string()), TRY(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).value();
// 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).value(),
offset_y.resolved(node).to_px(node).value(),
radius.has_value() ? radius->resolved(node).to_px(node).value() : 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;
}
ErrorOr<String> FilterValueListStyleValue::to_string() const
{
StringBuilder builder {};
bool first = true;
for (auto& filter_function : filter_value_list()) {
if (!first)
TRY(builder.try_append(' '));
TRY(filter_function.visit(
[&](Filter::Blur const& blur) -> ErrorOr<void> {
TRY(builder.try_append("blur("sv));
if (blur.radius.has_value())
TRY(builder.try_append(TRY(blur.radius->to_string())));
return {};
},
[&](Filter::DropShadow const& drop_shadow) -> ErrorOr<void> {
TRY(builder.try_appendff("drop-shadow({} {}"sv,
drop_shadow.offset_x, drop_shadow.offset_y));
if (drop_shadow.radius.has_value())
TRY(builder.try_appendff(" {}", TRY(drop_shadow.radius->to_string())));
if (drop_shadow.color.has_value()) {
TRY(builder.try_append(' '));
serialize_a_srgb_value(builder, *drop_shadow.color);
}
return {};
},
[&](Filter::HueRotate const& hue_rotate) -> ErrorOr<void> {
TRY(builder.try_append("hue-rotate("sv));
if (hue_rotate.angle.has_value()) {
TRY(hue_rotate.angle->visit(
[&](Angle const& angle) -> ErrorOr<void> {
return builder.try_append(TRY(angle.to_string()));
},
[&](auto&) -> ErrorOr<void> {
return builder.try_append('0');
}));
}
return {};
},
[&](Filter::Color const& color) -> ErrorOr<void> {
TRY(builder.try_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())
TRY(builder.try_append(TRY(color.amount->to_string())));
return {};
}));
TRY(builder.try_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;
}
ErrorOr<String> FlexStyleValue::to_string() const
{
return String::formatted("{} {} {}", TRY(m_grow->to_string()), TRY(m_shrink->to_string()), TRY(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);
}
ErrorOr<String> FlexFlowStyleValue::to_string() const
{
return String::formatted("{} {}", TRY(m_flex_direction->to_string()), TRY(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);
}
ErrorOr<String> FontStyleValue::to_string() const
{
return String::formatted("{} {} {} / {} {}", TRY(m_font_style->to_string()), TRY(m_font_weight->to_string()), TRY(m_font_size->to_string()), TRY(m_line_height->to_string()), TRY(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;
}
ErrorOr<String> GridTrackPlacementShorthandStyleValue::to_string() const
{
if (m_end->grid_track_placement().is_auto())
return String::formatted("{}", TRY(m_start->grid_track_placement().to_string()));
return String::formatted("{} / {}", TRY(m_start->grid_track_placement().to_string()), TRY(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);
}
ErrorOr<String> GridAreaShorthandStyleValue::to_string() const
{
StringBuilder builder;
if (!m_row_start->as_grid_track_placement().grid_track_placement().is_auto())
TRY(builder.try_appendff("{}", TRY(m_row_start->as_grid_track_placement().grid_track_placement().to_string())));
if (!m_column_start->as_grid_track_placement().grid_track_placement().is_auto())
TRY(builder.try_appendff(" / {}", TRY(m_column_start->as_grid_track_placement().grid_track_placement().to_string())));
if (!m_row_end->as_grid_track_placement().grid_track_placement().is_auto())
TRY(builder.try_appendff(" / {}", TRY(m_row_end->as_grid_track_placement().grid_track_placement().to_string())));
if (!m_column_end->as_grid_track_placement().grid_track_placement().is_auto())
TRY(builder.try_appendff(" / {}", TRY(m_column_end->as_grid_track_placement().grid_track_placement().to_string())));
return builder.to_string();
}
bool GridAreaShorthandStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_grid_area_shorthand();
return m_row_start->equals(typed_other.m_row_start)
&& m_column_start->equals(typed_other.m_column_start)
&& m_row_end->equals(typed_other.m_row_end)
&& m_column_end->equals(typed_other.m_column_end);
}
ErrorOr<String> 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();
}
ErrorOr<String> GridTemplateAreaStyleValue::to_string() const
{
StringBuilder builder;
for (size_t y = 0; y < m_grid_template_area.size(); ++y) {
for (size_t x = 0; x < m_grid_template_area[y].size(); ++x) {
TRY(builder.try_appendff("{}", m_grid_template_area[y][x]));
if (x < m_grid_template_area[y].size() - 1)
TRY(builder.try_append(" "sv));
}
if (y < m_grid_template_area.size() - 1)
TRY(builder.try_append(", "sv));
}
return builder.to_string();
}
bool GridTemplateAreaStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
auto const& typed_other = other.as_grid_template_area();
return m_grid_template_area == typed_other.grid_template_area();
}
ErrorOr<String> 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();
}
ErrorOr<String> IdentifierStyleValue::to_string() const
{
return String::from_utf8(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);
}
ErrorOr<String> ImageStyleValue::to_string() const
{
return String::from_deprecated_string(serialize_a_url(m_url.to_deprecated_string()));
}
bool ImageStyleValue::equals(StyleValue const& other) const
{
if (type() != other.type())
return false;
return m_url == other.as_image().m_url;
}
Optional<CSSPixels> ImageStyleValue::natural_width() const
{
if (auto* b = bitmap(0); b != nullptr)
return b->width();
return {};
}
Optional<CSSPixels> ImageStyleValue::natural_height() const
{
if (auto* b = bitmap(0); b != nullptr)
return b->height();
return {};
}
void ImageStyleValue::paint(PaintContext& context, DevicePixelRect 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.to_type<int>(), *b, bitmap(0)->rect(), 1.0f, to_gfx_scaling_mode(image_rendering));
}
static ErrorOr<void> serialize_color_stop_list(StringBuilder& builder, auto const& color_stop_list)
{
bool first = true;
for (auto const& element : color_stop_list) {
if (!first)
TRY(builder.try_append(", "sv));
if (element.transition_hint.has_value())
TRY(builder.try_appendff("{}, "sv, TRY(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())
TRY(builder.try_appendff(" {}"sv, TRY((*position)->to_string())));
}
first = false;
}
return {};
}
ErrorOr<String> 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)
TRY(builder.try_append("-webkit-"sv));
if (is_repeating())
TRY(builder.try_append("repeating-"sv));
TRY(builder.try_append("linear-gradient("sv));
TRY(m_direction.visit(
[&](SideOrCorner side_or_corner) -> ErrorOr<void> {
return builder.try_appendff("{}{}, "sv, m_gradient_type == GradientType::Standard ? "to "sv : ""sv, side_or_corner_to_string(side_or_corner));
},
[&](Angle const& angle) -> ErrorOr<void> {
return builder.try_appendff("{}, "sv, TRY(angle.to_string()));
}));
TRY(serialize_color_stop_list(builder, m_color_stop_list));
TRY(builder.try_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(CSSPixelSize gradient_size) const
{
auto corner_angle_degrees = [&] {
return static_cast<float>(atan2(gradient_size.height().value(), gradient_size.width().value())) * 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, CSSPixelSize 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, DevicePixelRect const& dest_rect, CSS::ImageRendering) const
{
VERIFY(m_resolved.has_value());
Painting::paint_linear_gradient(context, dest_rect, m_resolved->data);
}
CSSPixelPoint PositionValue::resolved(Layout::Node const& node, CSSPixelRect const& rect) const
{
// Note: A preset + a none default x/y_relative_to is impossible in the syntax (and makes little sense)
CSSPixels x = horizontal_position.visit(
[&](HorizontalPreset preset) -> CSSPixels {
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) -> CSSPixels {
return length_percentage.resolved(node, Length::make_px(rect.width())).to_px(node);
});
CSSPixels y = vertical_position.visit(
[&](VerticalPreset preset) -> CSSPixels {
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) -> CSSPixels {
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 CSSPixelPoint { rect.x() + x, rect.y() + y };
}
ErrorOr<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)
TRY(builder.try_append(x_relative_to == HorizontalEdge::Left ? "left "sv : "right "sv));
TRY(horizontal_position.visit(
[&](HorizontalPreset preset) -> ErrorOr<void> {
return builder.try_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) -> ErrorOr<void> {
return builder.try_appendff(TRY(length_percentage.to_string()));
}));
TRY(builder.try_append(' '));
if (has_relative_edges)
TRY(builder.try_append(y_relative_to == VerticalEdge::Top ? "top "sv : "bottom "sv));
TRY(vertical_position.visit(
[&](VerticalPreset preset) -> ErrorOr<void> {
return builder.try_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) -> ErrorOr<void> {
return builder.try_append(TRY(length_percentage.to_string()));
}));
return {};
}
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));
}
ErrorOr<String> RadialGradientStyleValue::to_string() const
{
StringBuilder builder;
if (is_repeating())
TRY(builder.try_append("repeating-"sv));
TRY(builder.try_appendff("radial-gradient({} "sv,
m_ending_shape == EndingShape::Circle ? "circle"sv : "ellipse"sv));
TRY(m_size.visit(
[&](Extent extent) -> ErrorOr<void> {
return builder.try_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) -> ErrorOr<void> {
return builder.try_append(TRY(circle_size.radius.to_string()));
},
[&](EllipseSize const& ellipse_size) -> ErrorOr<void> {
return builder.try_appendff("{} {}", TRY(ellipse_size.radius_a.to_string()), TRY(ellipse_size.radius_b.to_string()));
}));
if (m_position != PositionValue::center()) {
TRY(builder.try_appendff(" at "sv));
TRY(m_position.serialize(builder));
}
TRY(builder.try_append(", "sv));
TRY(serialize_color_stop_list(builder, m_color_stop_list));
TRY(builder.try_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, CSSPixelSize paint_size) const
{
CSSPixelRect gradient_box { { 0, 0 }, paint_size };
auto center = m_position.resolved(node, gradient_box).to_type<float>();
auto gradient_size = resolve_size(node, center, gradient_box.to_type<float>());
if (m_resolved.has_value() && m_resolved->gradient_size == gradient_size)
return;
m_resolved = ResolvedData {
Painting::resolve_radial_gradient_data(node, gradient_size.to_type<CSSPixels>(), *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, DevicePixelRect const& dest_rect, CSS::ImageRendering) const
{
VERIFY(m_resolved.has_value());
Painting::paint_radial_gradient(context, dest_rect, m_resolved->data,
context.rounded_device_point(m_resolved->center.to_type<CSSPixels>()),
context.rounded_device_size(m_resolved->gradient_size.to_type<CSSPixels>()));
}
ErrorOr<String> ConicGradientStyleValue::to_string() const
{
StringBuilder builder;
if (is_repeating())
TRY(builder.try_append("repeating-"sv));
TRY(builder.try_append("conic-gradient("sv));
bool has_from_angle = false;
bool has_at_position = false;
if ((has_from_angle = m_from_angle.to_degrees() != 0))
TRY(builder.try_appendff("from {}", TRY(m_from_angle.to_string())));
if ((has_at_position = m_position != PositionValue::center())) {
if (has_from_angle)
TRY(builder.try_append(' '));
TRY(builder.try_appendff("at "sv));
TRY(m_position.serialize(builder));
}
if (has_from_angle || has_at_position)
TRY(builder.try_append(", "sv));
TRY(serialize_color_stop_list(builder, m_color_stop_list));
TRY(builder.try_append(')'));
return builder.to_string();
}
void ConicGradientStyleValue::resolve_for_size(Layout::Node const& node, CSSPixelSize size) const
{
if (!m_resolved.has_value())
m_resolved = ResolvedData { Painting::resolve_conic_gradient_data(node, *this), {} };
m_resolved->position = m_position.resolved(node, CSSPixelRect { { 0, 0 }, size });
}
void ConicGradientStyleValue::paint(PaintContext& context, DevicePixelRect const& dest_rect, CSS::ImageRendering) const
{
VERIFY(m_resolved.has_value());
Painting::paint_conic_gradient(context, dest_rect, m_resolved->data, context.rounded_device_point(m_resolved->position));
}
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;
}
ErrorOr<String> ListStyleStyleValue::to_string() const
{
return String::formatted("{} {} {}", TRY(m_position->to_string()), TRY(m_image->to_string()), TRY(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);
}
ErrorOr<String> NumericStyleValue::to_string() const
{
return m_value.visit(
[](float value) {
return String::formatted("{}", value);
},
[](i64 value) {
return String::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>();
}
ErrorOr<String> OverflowStyleValue::to_string() const
{
return String::formatted("{} {}", TRY(m_overflow_x->to_string()), TRY(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);
}
ErrorOr<String> 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;
}
ErrorOr<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), TRY(m_offset_x.to_string()), to_string(m_edge_y), TRY(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;
}
ErrorOr<String> RectStyleValue::to_string() const
{
return String::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;
}
ErrorOr<String> ShadowStyleValue::to_string() const
{
StringBuilder builder;
TRY(builder.try_appendff("{} {} {} {} {}", m_color.to_deprecated_string(), TRY(m_offset_x.to_string()), TRY(m_offset_y.to_string()), TRY(m_blur_radius.to_string()), TRY(m_spread_distance.to_string())));
if (m_placement == ShadowPlacement::Inner)
TRY(builder.try_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;
}
ErrorOr<String> TextDecorationStyleValue::to_string() const
{
return String::formatted("{} {} {} {}", TRY(m_line->to_string()), TRY(m_thickness->to_string()), TRY(m_style->to_string()), TRY(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;
}
ErrorOr<String> TransformationStyleValue::to_string() const
{
StringBuilder builder;
TRY(builder.try_append(CSS::to_string(m_transform_function)));
TRY(builder.try_append('('));
TRY(builder.try_join(", "sv, m_values));
TRY(builder.try_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;
}
ErrorOr<String> UnresolvedStyleValue::to_string() const
{
StringBuilder builder;
for (auto& value : m_values)
TRY(builder.try_append(value.to_deprecated_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().release_value_but_fixme_should_propagate_errors() == other.to_string().release_value_but_fixme_should_propagate_errors();
}
bool UnsetStyleValue::equals(StyleValue const& other) const
{
return type() == other.type();
}
ErrorOr<String> StyleValueList::to_string() const
{
auto separator = ""sv;
switch (m_separator) {
case Separator::Space:
separator = " "sv;
break;
case Separator::Comma:
separator = ", "sv;
break;
default:
VERIFY_NOT_REACHED();
}
return String::from_deprecated_string(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<GridTemplateAreaStyleValue> GridTemplateAreaStyleValue::create(Vector<Vector<String>> grid_template_area)
{
return adopt_ref(*new GridTemplateAreaStyleValue(grid_template_area));
}
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, CSSPixelRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, CSSPixels font_size, CSSPixels 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(CSSPixelRect const&, Gfx::FontPixelMetrics const&, CSSPixels, CSSPixels) const
{
return *this;
}
NonnullRefPtr<StyleValue> LengthStyleValue::absolutized(CSSPixelRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, CSSPixels font_size, CSSPixels 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(CSSPixelRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, CSSPixels font_size, CSSPixels 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(CSSPixelRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, CSSPixels font_size, CSSPixels 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();
}
}
Reference in a new issue View git blame Copy permalink