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LibWeb: Start fleshing out support for relative CSS units

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This patch introduces support for more than just "absolute px" units in
our Length class. It now also supports "em" and "rem", which are units
relative to the font-size of the current layout node and the <html>
element's layout node respectively.
This commit is contained in:
Andreas Kling 2020-06-07 17:55:46 +02:00
parent d93bf78346
commit 731685468a
16 changed files with 163 additions and 92 deletions
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Libraries/LibWeb/CSS/StyleValue.h
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@ -212,7 +212,7 @@ public:
virtual String to_string() const override { return String::format("%g%%", m_percentage); }
Length to_length(float reference) const { return Length((m_percentage / 100.0f) * reference, Length::Type::Absolute); }
Length to_length(float reference) const { return Length((m_percentage / 100.0f) * reference, Length::Type::Px); }
private:
virtual Length to_length() const override { return {}; }