Files
ladybird/Libraries/LibWeb/HTML/HTMLTableColElement.cpp
Tim Ledbetter d1fc4b4234 LibWeb: Route presentational hints through the CSS cascade
Previously, presentational hints bypassed the regular cascade pipeline
and wrote directly into `CascadedProperties` under
`CascadeOrigin::Author`. That meant `var()` substitution and the
invalid-at-computed-value-time fallback had to be duplicated in a
separate per-element pass, which in practice missed the IACVT step and
could leave a `GuaranteedInvalidStyleValue` in the cascaded
properties. This caused a crash in downstream code that assumed the
value had been resolved.

This introduces an `AuthorPresentationalHint` cascade origin and feeds
them through the cascade as normal declarations. This means that
`var()` resolution now happens in only one place.
2026-04-30 19:50:28 +01:00

75 lines
2.5 KiB
C++

/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/HTMLTableColElement.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/ComputedProperties.h>
#include <LibWeb/HTML/HTMLTableColElement.h>
#include <LibWeb/HTML/Numbers.h>
#include <LibWeb/HTML/Parser/HTMLParser.h>
namespace Web::HTML {
GC_DEFINE_ALLOCATOR(HTMLTableColElement);
HTMLTableColElement::HTMLTableColElement(DOM::Document& document, DOM::QualifiedName qualified_name)
: HTMLElement(document, move(qualified_name))
{
}
HTMLTableColElement::~HTMLTableColElement() = default;
void HTMLTableColElement::initialize(JS::Realm& realm)
{
WEB_SET_PROTOTYPE_FOR_INTERFACE(HTMLTableColElement);
Base::initialize(realm);
}
// https://html.spec.whatwg.org/multipage/tables.html#dom-colgroup-span
WebIDL::UnsignedLong HTMLTableColElement::span() const
{
// The span IDL attribute must reflect the content attribute of the same name. It is clamped to the range [1, 1000], and its default value is 1.
if (auto span_string = get_attribute(HTML::AttributeNames::span); span_string.has_value()) {
if (auto span_digits = parse_non_negative_integer_digits(*span_string); span_digits.has_value()) {
auto span = span_digits->to_number<i64>();
// NOTE: If span has no value at this point, the value must be larger than NumericLimits<i64>::max(), so return the maximum value of 1000.
if (!span.has_value())
return 1000;
return clamp(*span, 1, 1000);
}
}
return 1;
}
void HTMLTableColElement::set_span(unsigned int value)
{
if (value > 2147483647)
value = 1;
set_attribute_value(HTML::AttributeNames::span, String::number(value));
}
bool HTMLTableColElement::is_presentational_hint(FlyString const& name) const
{
if (Base::is_presentational_hint(name))
return true;
return name == HTML::AttributeNames::width;
}
void HTMLTableColElement::apply_presentational_hints(Vector<CSS::StyleProperty>& properties) const
{
Base::apply_presentational_hints(properties);
for_each_attribute([&](auto& name, auto& value) {
// https://html.spec.whatwg.org/multipage/rendering.html#tables-2:maps-to-the-dimension-property-2
if (name == HTML::AttributeNames::width) {
if (auto parsed_value = parse_dimension_value(value))
properties.append({ .property_id = CSS::PropertyID::Width, .value = *parsed_value });
}
});
}
}