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LibWeb: Plumbing for svg stroke-dashoffset

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This commit is contained in:
Nico Weber
2024-11-18 21:21:22 -05:00
committed by Jelle Raaijmakers
parent e98e9b8e81
commit 6fc06f45c2
8 changed files with 223 additions and 177 deletions
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22
Libraries/LibWeb/SVG/SVGGraphicsElement.cpp
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@@ -150,6 +150,7 @@ void SVGGraphicsElement::apply_presentational_hints(CSS::StyleProperties& style)
NamedPropertyID(CSS::PropertyID::Fill),
// FIXME: The `stroke` attribute and CSS `stroke` property are not the same! But our support is limited enough that they are equivalent for now.
NamedPropertyID(CSS::PropertyID::Stroke),
NamedPropertyID(CSS::PropertyID::StrokeDashoffset),
NamedPropertyID(CSS::PropertyID::StrokeLinecap),
NamedPropertyID(CSS::PropertyID::StrokeLinejoin),
NamedPropertyID(CSS::PropertyID::StrokeMiterlimit),
@@ -266,13 +267,10 @@ Optional<float> SVGGraphicsElement::stroke_opacity() const
return layout_node()->computed_values().stroke_opacity();
}
Optional<float> SVGGraphicsElement::stroke_width() const
float SVGGraphicsElement::resolve_relative_to_viewport_size(CSS::LengthPercentage const& length_percentage) const
{
if (!layout_node())
return {};
// FIXME: Converting to pixels isn't really correct - values should be in "user units"
// https://svgwg.org/svg2-draft/coords.html#TermUserUnits
auto width = layout_node()->computed_values().stroke_width();
// Resolved relative to the "Scaled viewport size": https://www.w3.org/TR/2017/WD-fill-stroke-3-20170413/#scaled-viewport-size
// FIXME: This isn't right, but it's something.
CSSPixels viewport_width = 0;
@@ -284,7 +282,21 @@ Optional<float> SVGGraphicsElement::stroke_width() const
}
}
auto scaled_viewport_size = (viewport_width + viewport_height) * CSSPixels(0.5);
return width.to_px(*layout_node(), scaled_viewport_size).to_double();
return length_percentage.to_px(*layout_node(), scaled_viewport_size).to_double();
}
Optional<float> SVGGraphicsElement::stroke_dashoffset() const
{
if (!layout_node())
return {};
return resolve_relative_to_viewport_size(layout_node()->computed_values().stroke_dashoffset());
}
Optional<float> SVGGraphicsElement::stroke_width() const
{
if (!layout_node())
return {};
return resolve_relative_to_viewport_size(layout_node()->computed_values().stroke_width());
}
// https://svgwg.org/svg2-draft/types.html#__svg__SVGGraphicsElement__getBBox