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LibWeb/CSS: Add StyleValue getter to CSSStyleDeclarations

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Will be used by StylePropertyMap, as that wants a StyleValue to reify,
not a string representation.
This commit is contained in:
Sam Atkins 2025-08-13 15:21:11 +01:00
commit 25c4c2397e
Notes: github-actions[bot] 2025-08-18 09:14:10 +00:00
5 changed files with 21 additions and 0 deletions
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8
Libraries/LibWeb/CSS/CSSDescriptors.cpp
View file

@ -289,6 +289,14 @@ bool CSSDescriptors::has_property(StringView property_name) const
return descriptor(*descriptor_id) != nullptr;
}
RefPtr<StyleValue const> CSSDescriptors::get_property_style_value(StringView property_name) const
{
auto descriptor_id = descriptor_id_from_string(m_at_rule_id, property_name);
if (!descriptor_id.has_value())
return nullptr;
return descriptor(*descriptor_id);
}
bool is_shorthand(AtRuleID at_rule, DescriptorID descriptor)
{
if (at_rule == AtRuleID::Page && descriptor == DescriptorID::Margin)

1
Libraries/LibWeb/CSS/CSSDescriptors.h
View file

@ -34,6 +34,7 @@ public:
virtual WebIDL::ExceptionOr<void> set_css_text(StringView) override;
virtual bool has_property(StringView property_name) const override;
virtual RefPtr<StyleValue const> get_property_style_value(StringView property_name) const override;
protected:
CSSDescriptors(JS::Realm&, AtRuleID, Vector<Descriptor>);

1
Libraries/LibWeb/CSS/CSSStyleDeclaration.h
View file

@ -58,6 +58,7 @@ public:
void set_is_updating(bool value) { m_updating = value; }
virtual bool has_property(StringView property_name) const = 0;
virtual RefPtr<StyleValue const> get_property_style_value(StringView property_name) const = 0;
protected:
enum class Computed : u8 {

10
Libraries/LibWeb/CSS/CSSStyleProperties.cpp
View file

@ -434,6 +434,16 @@ bool CSSStyleProperties::has_property(StringView property_name) const
return get_property_internal(*property_id).has_value();
}
RefPtr<StyleValue const> CSSStyleProperties::get_property_style_value(StringView property_name) const
{
auto property_id = property_id_from_string(property_name);
if (!property_id.has_value())
return nullptr;
if (auto style_property = get_property_internal(*property_id); style_property.has_value())
return style_property->value;
return nullptr;
}
// https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-getpropertyvalue
Optional<StyleProperty> CSSStyleProperties::get_property_internal(PropertyID property_id) const
{

1
Libraries/LibWeb/CSS/CSSStyleProperties.h
View file

@ -50,6 +50,7 @@ public:
size_t custom_property_count() const { return m_custom_properties.size(); }
virtual bool has_property(StringView property_name) const override;
virtual RefPtr<StyleValue const> get_property_style_value(StringView property_name) const override;
String css_float() const;
WebIDL::ExceptionOr<void> set_css_float(StringView);