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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
commit 731685468a
Notes: sideshowbarker 2024-07-19 05:47:10 +09:00
16 changed files with 163 additions and 92 deletions
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4
Libraries/LibWeb/CSS/StyleProperties.cpp
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@ -172,11 +172,11 @@ void StyleProperties::load_font() const
return;
}
float StyleProperties::line_height() const
float StyleProperties::line_height(const LayoutNode& layout_node) const
{
auto line_height_length = length_or_fallback(CSS::PropertyID::LineHeight, {});
if (line_height_length.is_absolute())
return (float)line_height_length.to_px();
return (float)line_height_length.to_px(layout_node);
return (float)font().glyph_height() * 1.4f;
}