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LibWeb: Add basic implementation of @page

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This doesn't support selectors, and the only descriptors for now are for
margins.
This commit is contained in:
Sam Atkins 2025-05-13 12:17:41 +01:00
commit aaf07ae30d
Notes: github-actions[bot] 2025-05-15 08:54:53 +00:00
27 changed files with 471 additions and 20 deletions
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8
Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -1375,6 +1375,8 @@ Vector<Descriptor> Parser::parse_as_descriptor_declaration_block(AtRuleID at_rul
switch (at_rule_id) {
case AtRuleID::FontFace:
return RuleContext::AtFontFace;
case AtRuleID::Page:
return RuleContext::AtPage;
case AtRuleID::Property:
return RuleContext::AtProperty;
}
@ -1434,8 +1436,9 @@ bool Parser::is_valid_in_the_current_context(Declaration const&) const
return m_rule_context.contains_slow(RuleContext::Style);
case RuleContext::AtFontFace:
case RuleContext::AtPage:
case RuleContext::AtProperty:
// @font-face and @property have descriptor declarations
// @font-face, @page, and @property have descriptor declarations
return true;
case RuleContext::AtKeyframes:
@ -1482,8 +1485,10 @@ bool Parser::is_valid_in_the_current_context(AtRule const& at_rule) const
case RuleContext::AtFontFace:
case RuleContext::AtKeyframes:
case RuleContext::Keyframe:
case RuleContext::AtPage:
case RuleContext::AtProperty:
// These can't contain any at-rules
// FIXME: Eventually @page can contain margin-box at-rules: https://drafts.csswg.org/css-page-3/#margin-at-rules
return false;
}
@ -1522,6 +1527,7 @@ bool Parser::is_valid_in_the_current_context(QualifiedRule const&) const
return false;
case RuleContext::AtFontFace:
case RuleContext::AtPage:
case RuleContext::AtProperty:
case RuleContext::Keyframe:
// These can't contain qualified rules