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LibWeb: Implement CSS declaration block's "updating flag"

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This flag is used to prevent reparsing the style attribute after it is
automatically updated after using the CSSOM API to mutate style.
This commit is contained in:
Andreas Kling 2022-04-11 16:56:52 +02:00
parent 66618a666b
commit a8afb883c1
4 changed files with 27 additions and 2 deletions
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8
Userland/Libraries/LibWeb/DOM/Element.cpp
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@ -293,6 +293,11 @@ RefPtr<Layout::Node> Element::create_layout_node_for_display_type(DOM::Document&
TODO();
}
CSS::CSSStyleDeclaration const* Element::inline_style() const
{
return m_inline_style;
}
void Element::parse_attribute(FlyString const& name, String const& value)
{
if (name == HTML::AttributeNames::class_) {
@ -305,6 +310,9 @@ void Element::parse_attribute(FlyString const& name, String const& value)
if (m_class_list)
m_class_list->associated_attribute_changed(value);
} else if (name == HTML::AttributeNames::style) {
// https://drafts.csswg.org/cssom/#ref-for-cssstyledeclaration-updating-flag
if (m_inline_style && m_inline_style->is_updating())
return;
m_inline_style = parse_css_style_attribute(CSS::ParsingContext(document()), value, *this);
set_needs_style_update(true);
}