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LibWeb: Add parser for the HTML "non-zero dimensions value" microsyntax

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This commit is contained in:
Andreas Kling 2022-03-26 14:11:03 +01:00
parent fe908e7db2
commit 28c929e85c
2 changed files with 23 additions and 0 deletions
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22
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -5242,4 +5242,26 @@ RefPtr<CSS::StyleValue> parse_dimension_value(StringView string)
return parse_current_dimension_value(value, input, position);
}
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-non-zero-dimension-values
RefPtr<CSS::StyleValue> parse_nonzero_dimension_value(StringView string)
{
// 1. Let input be the string being parsed.
// 2. Let value be the result of parsing input using the rules for parsing dimension values.
auto value = parse_dimension_value(string);
// 3. If value is an error, return an error.
if (!value)
return nullptr;
// 4. If value is zero, return an error.
if (value->is_length() && value->as_length().length().raw_value() == 0)
return nullptr;
if (value->is_percentage() && value->as_percentage().percentage().value() == 0)
return nullptr;
// 5. If value is a percentage, return value as a percentage.
// 6. Return value as a length.
return value;
}
}