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LibWeb: Implement length and item() for ResolvedCSSStyleDeclaration

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This commit is contained in:
Sam Atkins
2023-09-29 16:48:54 +01:00
committed by Andreas Kling
parent 08cf35cf9a
commit a3a5af3fd1
1 changed files with 11 additions and 3 deletions
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14
Userland/Libraries/LibWeb/CSS/ResolvedCSSStyleDeclaration.cpp
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@@ -61,15 +61,23 @@ void ResolvedCSSStyleDeclaration::visit_edges(Cell::Visitor& visitor)
visitor.visit(m_element.ptr());
}
// https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-length
size_t ResolvedCSSStyleDeclaration::length() const
{
return 0;
// The length attribute must return the number of CSS declarations in the declarations.
// FIXME: Include the number of custom properties.
return to_underlying(last_longhand_property_id) - to_underlying(first_longhand_property_id) + 1;
}
// https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-item
String ResolvedCSSStyleDeclaration::item(size_t index) const
{
(void)index;
return {};
// The item(index) method must return the property name of the CSS declaration at position index.
// FIXME: Return custom properties if index > last_longhand_property_id.
if (index > length())
return {};
auto property_id = static_cast<PropertyID>(index + to_underlying(first_longhand_property_id));
return MUST(String::from_utf8(string_from_property_id(property_id)));
}
static NonnullRefPtr<StyleValue const> style_value_for_background_property(Layout::NodeWithStyle const& layout_node, Function<NonnullRefPtr<StyleValue const>(BackgroundLayerData const&)> callback, Function<NonnullRefPtr<StyleValue const>()> default_value)