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LibWeb: Wrap font metrics into a struct

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Rather than passing an increasingly-unwieldy number of font parameters
individually to every function that resolves lengths, let's wrap them
up.

This is frustratingly close to being `Gfx::FontPixelMetrics`, but bitmap
fonts cause issues: We choose the closest font to what the CSS
requests, but that might have a wildly different size than what the
page expects, so we have to fudge the numbers.

No behaviour changes.
This commit is contained in:
Sam Atkins 2023-04-28 16:29:12 +01:00 • committed by Andreas Kling
parent 4a191875a9
commit 0679b4e0b9
14 changed files with 107 additions and 62 deletions
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4
Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.cpp
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@ -27,9 +27,9 @@ ValueComparingNonnullRefPtr<LengthStyleValue> LengthStyleValue::create(Length co
return adopt_ref(*new LengthStyleValue(length));
}
ValueComparingNonnullRefPtr<StyleValue const> LengthStyleValue::absolutized(CSSPixelRect const& viewport_rect, Gfx::FontPixelMetrics const& font_metrics, CSSPixels font_size, CSSPixels root_font_size, CSSPixels line_height, CSSPixels root_line_height) const
ValueComparingNonnullRefPtr<StyleValue const> LengthStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
{
if (auto length = m_length.absolutize(viewport_rect, font_metrics, font_size, root_font_size, line_height, root_line_height); length.has_value())
if (auto length = m_length.absolutize(viewport_rect, font_metrics, root_font_metrics); length.has_value())
return LengthStyleValue::create(length.release_value());
return *this;
}