mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-10-16 13:09:41 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

LibWeb/CSS: Implement "Create a sum value"

Browse source
This commit is contained in:
Sam Atkins 2025-09-11 16:48:57 +01:00 • committed by Jelle Raaijmakers
commit 80abffd2e8
Notes: github-actions[bot] 2025-09-12 11:46:44 +00:00
17 changed files with 320 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

76
Libraries/LibWeb/CSS/CSSUnitValue.cpp
View file

@ -186,4 +186,80 @@ bool CSSUnitValue::is_equal_numeric_value(GC::Ref<CSSNumericValue> other) const
&& m_value == other_unit_value->m_value;
}
// https://drafts.css-houdini.org/css-typed-om-1/#create-a-sum-value
Optional<SumValue> CSSUnitValue::create_a_sum_value() const
{
// 1. Let unit be the value of this’s unit internal slot, and value be the value of this’s value internal slot.
auto unit = m_unit;
auto value = m_value;
// 2. If unit is a member of a set of compatible units, and is not the set’s canonical unit, multiply value
// by the conversion ratio between unit and the canonical unit, and change unit to the canonical unit.
if (auto dimension_type = dimension_for_unit(unit); dimension_type.has_value()) {
switch (*dimension_type) {
case DimensionType::Angle: {
auto angle_unit = string_to_angle_unit(unit).release_value();
auto canonical_unit = canonical_angle_unit();
if (angle_unit != canonical_unit && units_are_compatible(angle_unit, canonical_unit)) {
value *= ratio_between_units(angle_unit, canonical_unit);
unit = CSS::to_string(canonical_unit);
}
break;
}
case DimensionType::Flex: {
auto flex_unit = string_to_flex_unit(unit).release_value();
auto canonical_unit = canonical_flex_unit();
if (flex_unit != canonical_unit && units_are_compatible(flex_unit, canonical_unit)) {
value *= ratio_between_units(flex_unit, canonical_unit);
unit = CSS::to_string(canonical_unit);
}
break;
}
case DimensionType::Frequency: {
auto frequency_unit = string_to_frequency_unit(unit).release_value();
auto canonical_unit = canonical_frequency_unit();
if (frequency_unit != canonical_unit && units_are_compatible(frequency_unit, canonical_unit)) {
value *= ratio_between_units(frequency_unit, canonical_unit);
unit = CSS::to_string(canonical_unit);
}
break;
}
case DimensionType::Length: {
auto length_unit = string_to_length_unit(unit).release_value();
auto canonical_unit = canonical_length_unit();
if (length_unit != canonical_unit && units_are_compatible(length_unit, canonical_unit)) {
value *= ratio_between_units(length_unit, canonical_unit);
unit = CSS::to_string(canonical_unit);
}
break;
}
case DimensionType::Resolution: {
auto resolution_unit = string_to_resolution_unit(unit).release_value();
auto canonical_unit = canonical_resolution_unit();
if (resolution_unit != canonical_unit && units_are_compatible(resolution_unit, canonical_unit)) {
value *= ratio_between_units(resolution_unit, canonical_unit);
unit = CSS::to_string(canonical_unit);
}
break;
}
case DimensionType::Time: {
auto time_unit = string_to_time_unit(unit).release_value();
auto canonical_unit = canonical_time_unit();
if (time_unit != canonical_unit && units_are_compatible(time_unit, canonical_unit)) {
value *= ratio_between_units(time_unit, canonical_unit);
unit = CSS::to_string(canonical_unit);
}
break;
}
}
}
// 3. If unit is "number", return «(value, «[ ]»)».
if (unit == "number"_fly_string)
return SumValue { SumValueItem { value, {} } };
// 4. Otherwise, return «(value, «[unit → 1]»)».
return SumValue { SumValueItem { value, { { unit, 1 } } } };
}
}