LibWeb: Make transform: scale(calc(..)) work

The `transform` property supports transform functions that sometimes
need their `calc(percentage)` values to be converted to a number instead
of a length. Currently this only applies to the `scale*` family of
functions, which are marked as such in `TransformFunctions.json`.

We were not consistently applying the `NumberPercentage` type to these
functions though, and in addition, any `NumberPercentage` value would
not consider calculated values.
This commit is contained in:
Jelle Raaijmakers 2025-03-25 14:04:17 +00:00 committed by Sam Atkins
parent 202cbe7df6
commit 545d151948
Notes: github-actions[bot] 2025-03-25 19:54:42 +00:00
5 changed files with 26 additions and 10 deletions

View file

@ -24,17 +24,15 @@ Transformation TransformationStyleValue::to_transformation() const
Vector<TransformValue> values;
size_t argument_index = 0;
for (auto& transformation_value : m_properties.values) {
auto const function_type = function_metadata.parameters[argument_index].type;
if (transformation_value->is_calculated()) {
auto& calculated = transformation_value->as_calculated();
if (calculated.resolves_to_length_percentage()) {
if (function_type == TransformFunctionParameterType::NumberPercentage
&& (calculated.resolves_to_number() || calculated.resolves_to_percentage())) {
values.append(NumberPercentage { calculated });
} else if (calculated.resolves_to_length_percentage()) {
values.append(LengthPercentage { calculated });
} else if (calculated.resolves_to_percentage()) {
// FIXME: Maybe transform this for loop to always check the metadata for the correct types
if (function_metadata.parameters[argument_index].type == TransformFunctionParameterType::NumberPercentage) {
values.append(NumberPercentage { calculated });
} else {
values.append(LengthPercentage { calculated });
}
} else if (calculated.resolves_to_number()) {
values.append(NumberPercentage { calculated });
} else if (calculated.resolves_to_angle()) {
@ -45,7 +43,7 @@ Transformation TransformationStyleValue::to_transformation() const
} else if (transformation_value->is_length()) {
values.append({ transformation_value->as_length().length() });
} else if (transformation_value->is_percentage()) {
if (function_metadata.parameters[argument_index].type == TransformFunctionParameterType::NumberPercentage) {
if (function_type == TransformFunctionParameterType::NumberPercentage) {
values.append(NumberPercentage { transformation_value->as_percentage().percentage() });
} else {
values.append(LengthPercentage { transformation_value->as_percentage().percentage() });