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LibWeb: Add basic support for CSS percentages

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Many properties can now have percentage values that get resolved in
layout. The reference value (what is this a percentage *of*?) differs
per property, so I've added a helper where you provide a reference
value as an added parameter to the existing length_or_fallback().
This commit is contained in:
Andreas Kling 2020-05-11 23:04:59 +02:00
parent 8ffdcce0d0
commit 5f9d80d8bc
7 changed files with 117 additions and 31 deletions
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Libraries/LibWeb/CSS/StyleProperties.h
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@ -55,6 +55,7 @@ public:
Optional<NonnullRefPtr<StyleValue>> property(CSS::PropertyID) const;
Length length_or_fallback(CSS::PropertyID, const Length& fallback) const;
Length length_or_fallback(CSS::PropertyID, const Length& fallback, float reference_for_percentages) const;
String string_or_fallback(CSS::PropertyID, const StringView& fallback) const;
Color color_or_fallback(CSS::PropertyID, const Document&, Color fallback) const;