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LibWeb: Wrap font metrics into a struct

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

View file

@ -23,7 +23,7 @@ public:
virtual bool has_length() const override { return true; }
virtual ErrorOr<String> to_string() const override { return m_length.to_string(); }
virtual Length to_length() const override { return m_length; }
virtual ValueComparingNonnullRefPtr<StyleValue const> 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 override;
virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
bool properties_equal(LengthStyleValue const& other) const { return m_length == other.m_length; }