LibWeb: Use (transformed) path bounding quad for SVG path hit testing

This is needed for hit testing the directional arrows on the Street
View office tour, and generally makes SVG hit testing more precise.

Note: The rough bounding box is hit test first, so this should not
be a load more overhead.

Userland/Libraries/LibWeb/Painting/SVGGeometryPaintable.cpp

@@ -27,6 +27,19 @@ Layout::SVGGeometryBox const& SVGGeometryPaintable::layout_box() const
     return static_cast<Layout::SVGGeometryBox const&>(layout_node());
 }
 
+Optional<HitTestResult> SVGGeometryPaintable::hit_test(CSSPixelPoint position, HitTestType type) const
+{
+    auto result = SVGGraphicsPaintable::hit_test(position, type);
+    if (!result.has_value())
+        return {};
+    auto& geometry_element = layout_box().dom_node();
+    auto transformed_bounding_box = layout_box().layout_transform().map_to_quad(
+        const_cast<SVG::SVGGeometryElement&>(geometry_element).get_path().bounding_box());
+    if (!transformed_bounding_box.contains(position.to_type<float>()))
+        return {};
+    return result;
+}
+
 void SVGGeometryPaintable::paint(PaintContext& context, PaintPhase phase) const
 {
     if (!is_visible())

Userland/Libraries/LibWeb/Painting/SVGGeometryPaintable.h

@@ -17,6 +17,8 @@ class SVGGeometryPaintable final : public SVGGraphicsPaintable {
 public:
     static JS::NonnullGCPtr<SVGGeometryPaintable> create(Layout::SVGGeometryBox const&);
 
+    virtual Optional<HitTestResult> hit_test(CSSPixelPoint, HitTestType) const override;
+
     virtual void paint(PaintContext&, PaintPhase) const override;
 
     Layout::SVGGeometryBox const& layout_box() const;