LibWeb: Implement CanvasDrawPath::isPointInPath()

Author: https://github.com/mierenhoop
Commit: 259e798a26
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1423
Reviewed-by: https://github.com/AtkinsSJ

Userland/Libraries/LibWeb/HTML/Canvas/CanvasDrawPath.h

@@ -27,6 +27,9 @@ public:
     virtual void clip(StringView fill_rule) = 0;
     virtual void clip(Path2D& path, StringView fill_rule) = 0;
 
+    virtual bool is_point_in_path(double x, double y, StringView fill_rule) = 0;
+    virtual bool is_point_in_path(Path2D const& path, double x, double y, StringView fill_rule) = 0;
+
 protected:
     CanvasDrawPath() = default;
 };

Userland/Libraries/LibWeb/HTML/Canvas/CanvasDrawPath.idl

@@ -18,8 +18,10 @@ interface mixin CanvasDrawPath {
     // FIXME: `DOMString` should be `CanvasFillRule`
     undefined clip(Path2D path, optional DOMString fillRule = "nonzero");
 
-    [FIXME] boolean isPointInPath(unrestricted double x, unrestricted double y, optional CanvasFillRule fillRule = "nonzero");
+    // FIXME: `DOMString` should be `CanvasFillRule`
-    [FIXME] boolean isPointInPath(Path2D path, unrestricted double x, unrestricted double y, optional CanvasFillRule fillRule = "nonzero");
+    boolean isPointInPath(unrestricted double x, unrestricted double y, optional DOMString fillRule = "nonzero");
+    // FIXME: `DOMString` should be `CanvasFillRule`
+    boolean isPointInPath(Path2D path, unrestricted double x, unrestricted double y, optional DOMString fillRule = "nonzero");
     [FIXME] boolean isPointInStroke(unrestricted double x, unrestricted double y);
     [FIXME] boolean isPointInStroke(Path2D path, unrestricted double x, unrestricted double y);
 };

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp

@@ -542,6 +542,21 @@ void CanvasRenderingContext2D::clip(Path2D& path, StringView fill_rule)
     clip_internal(path.path(), parse_fill_rule(fill_rule));
 }
 
+static bool is_point_in_path_internal(Gfx::Path path, double x, double y, StringView fill_rule)
+{
+    return path.contains(Gfx::FloatPoint(x, y), parse_fill_rule(fill_rule));
+}
+
+bool CanvasRenderingContext2D::is_point_in_path(double x, double y, StringView fill_rule)
+{
+    return is_point_in_path_internal(path(), x, y, fill_rule);
+}
+
+bool CanvasRenderingContext2D::is_point_in_path(Path2D const& path, double x, double y, StringView fill_rule)
+{
+    return is_point_in_path_internal(path.path(), x, y, fill_rule);
+}
+
 // https://html.spec.whatwg.org/multipage/canvas.html#check-the-usability-of-the-image-argument
 WebIDL::ExceptionOr<CanvasImageSourceUsability> check_usability_of_image(CanvasImageSource const& image)
 {

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h

@@ -87,6 +87,9 @@ public:
     virtual void clip(StringView fill_rule) override;
     virtual void clip(Path2D& path, StringView fill_rule) override;
 
+    virtual bool is_point_in_path(double x, double y, StringView fill_rule) override;
+    virtual bool is_point_in_path(Path2D const& path, double x, double y, StringView fill_rule) override;
+
     virtual bool image_smoothing_enabled() const override;
     virtual void set_image_smoothing_enabled(bool) override;
     virtual Bindings::ImageSmoothingQuality image_smoothing_quality() const override;