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LibWeb/CSS: Don't serialize font shorthand with invalid longhand values

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Some values that are valid in font's longhands individually are not
allowed inside the font shorthand.
This commit is contained in:
Sam Atkins 2025-02-12 13:11:42 +00:00
commit 75faea3221
Notes: github-actions[bot] 2025-02-12 16:01:44 +00:00
2 changed files with 28 additions and 4 deletions
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28
Libraries/LibWeb/CSS/StyleValues/ShorthandStyleValue.cpp
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@ -175,6 +175,30 @@ String ShorthandStyleValue::to_string(SerializationMode mode) const
auto line_height = longhand(PropertyID::LineHeight);
auto font_family = longhand(PropertyID::FontFamily);
// Some longhands prevent serialization if they are not allowed in the shorthand.
// <font-variant-css2> = normal | small-caps
auto font_variant_string = font_variant->to_string(mode);
if (!first_is_one_of(font_variant_string, "normal"sv, "small-caps"sv) && !CSS::is_css_wide_keyword(font_variant_string)) {
return {};
}
// <font-width-css3> = normal | ultra-condensed | extra-condensed | condensed | semi-condensed | semi-expanded | expanded | extra-expanded | ultra-expanded
switch (font_width->to_keyword()) {
case Keyword::Initial:
case Keyword::Normal:
case Keyword::UltraCondensed:
case Keyword::ExtraCondensed:
case Keyword::Condensed:
case Keyword::SemiCondensed:
case Keyword::SemiExpanded:
case Keyword::Expanded:
case Keyword::ExtraExpanded:
case Keyword::UltraExpanded:
break;
default:
if (!font_width->is_css_wide_keyword())
return {};
}
StringBuilder builder;
auto append = [&](auto const& string) {
if (!builder.is_empty())
@ -183,8 +207,8 @@ String ShorthandStyleValue::to_string(SerializationMode mode) const
};
if (font_style->to_keyword() != Keyword::Normal && font_style->to_keyword() != Keyword::Initial)
append(font_style->to_string(mode));
if (auto variant_string = font_variant->to_string(mode); variant_string != "normal"sv && variant_string != "initial"sv)
append(variant_string);
if (font_variant_string != "normal"sv && font_variant_string != "initial"sv)
append(font_variant_string);
if (font_weight->to_font_weight() != Gfx::FontWeight::Regular && font_weight->to_keyword() != Keyword::Initial)
append(font_weight->to_string(mode));
if (font_width->to_keyword() != Keyword::Normal && font_width->to_keyword() != Keyword::Initial)