ladybird/Libraries/LibWeb/CSS/CSSPageRule.cpp
Sam Atkins aaf07ae30d LibWeb: Add basic implementation of @page
This doesn't support selectors, and the only descriptors for now are for
margins.
2025-05-15 09:53:29 +01:00

80 lines
2.4 KiB
C++

/*
* Copyright (c) 2025, Sam Atkins <sam@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/CSSPageRulePrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/CSSPageRule.h>
#include <LibWeb/CSS/DescriptorID.h>
#include <LibWeb/CSS/Serialize.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::CSS {
GC_DEFINE_ALLOCATOR(CSSPageRule);
GC::Ref<CSSPageRule> CSSPageRule::create(JS::Realm& realm, SelectorList&& selectors, GC::Ref<CSSPageDescriptors> style, CSSRuleList& rules)
{
return realm.create<CSSPageRule>(realm, move(selectors), style, rules);
}
CSSPageRule::CSSPageRule(JS::Realm& realm, SelectorList&& selectors, GC::Ref<CSSPageDescriptors> style, CSSRuleList& rules)
: CSSGroupingRule(realm, rules, Type::Page)
, m_selectors(move(selectors))
, m_style(style)
{
m_style->set_parent_rule(*this);
}
void CSSPageRule::initialize(JS::Realm& realm)
{
WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSPageRule);
Base::initialize(realm);
}
// https://drafts.csswg.org/cssom/#dom-csspagerule-selectortext
String CSSPageRule::selector_text() const
{
// The selectorText attribute, on getting, must return the result of serializing the associated selector list.
return serialize_a_group_of_selectors(m_selectors);
}
// https://drafts.csswg.org/cssom/#dom-csspagerule-selectortext
void CSSPageRule::set_selector_text(StringView)
{
// FIXME: On setting the selectorText attribute these steps must be run:
// 1. Run the parse a list of CSS page selectors algorithm on the given value.
// 2. If the algorithm returns a non-null value replace the associated selector list with the returned value.
// 3. Otherwise, if the algorithm returns a null value, do nothing.
}
// https://drafts.csswg.org/cssom/#ref-for-csspagerule
String CSSPageRule::serialized() const
{
auto& descriptors = *m_style;
StringBuilder builder;
// AD-HOC: There's no spec for this yet.
builder.append("@page "sv);
if (auto selector = selector_text(); !selector.is_empty())
builder.appendff("{} ", selector);
builder.append("{ "sv);
if (descriptors.length() > 0) {
builder.append(descriptors.serialized());
builder.append(' ');
}
builder.append("}"sv);
return builder.to_string_without_validation();
}
void CSSPageRule::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_style);
}
}