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LibWeb: Throw exception if any canvas radial gradient radius is < 0

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As per the specification:
https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-createradialgradient
This commit is contained in:
MacDue 2023-01-28 00:05:10 +00:00 committed by Linus Groh
parent 8dc4e05ecf
commit f86b66dc2d
Notes: sideshowbarker 2024-07-17 01:04:12 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/f86b66dc2d
Pull-request: https://github.com/SerenityOS/serenity/pull/17212
Reviewed-by: https://github.com/linusg
3 changed files with 10 additions and 3 deletions
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2
Userland/Libraries/LibWeb/HTML/Canvas/CanvasFillStrokeStyles.h
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@ -55,7 +55,7 @@ public:
return my_drawing_state().stroke_style.to_js_fill_or_stoke_style();
}
JS::NonnullGCPtr<CanvasGradient> create_radial_gradient(double x0, double y0, double r0, double x1, double y1, double r1)
WebIDL::ExceptionOr<JS::NonnullGCPtr<CanvasGradient>> create_radial_gradient(double x0, double y0, double r0, double x1, double y1, double r1)
{
auto& realm = static_cast<IncludingClass&>(*this).realm();
return CanvasGradient::create_radial(realm, x0, y0, r0, x1, y1, r1);

9
Userland/Libraries/LibWeb/HTML/CanvasGradient.cpp
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@ -12,8 +12,15 @@
namespace Web::HTML {
JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_radial(JS::Realm& realm, double x0, double y0, double r0, double x1, double y1, double r1)
// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-createradialgradient
WebIDL::ExceptionOr<JS::NonnullGCPtr<CanvasGradient>> CanvasGradient::create_radial(JS::Realm& realm, double x0, double y0, double r0, double x1, double y1, double r1)
{
// If either of r0 or r1 are negative, then an "IndexSizeError" DOMException must be thrown.
if (r0 < 0)
return WebIDL::IndexSizeError::create(realm, "The r0 passed is less than 0");
if (r1 < 0)
return WebIDL::IndexSizeError::create(realm, "The r1 passed is less than 0");
auto radial_gradient = Gfx::CanvasRadialGradientPaintStyle::create(Gfx::FloatPoint { x0, y0 }, r0, Gfx::FloatPoint { x1, y1 }, r1);
return realm.heap().allocate<CanvasGradient>(realm, realm, *radial_gradient);
}

2
Userland/Libraries/LibWeb/HTML/CanvasGradient.h
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@ -16,7 +16,7 @@ class CanvasGradient final : public Bindings::PlatformObject {
WEB_PLATFORM_OBJECT(CanvasGradient, Bindings::PlatformObject);
public:
static JS::NonnullGCPtr<CanvasGradient> create_radial(JS::Realm&, double x0, double y0, double r0, double x1, double y1, double r1);
static WebIDL::ExceptionOr<JS::NonnullGCPtr<CanvasGradient>> create_radial(JS::Realm&, double x0, double y0, double r0, double x1, double y1, double r1);
static JS::NonnullGCPtr<CanvasGradient> create_linear(JS::Realm&, double x0, double y0, double x1, double y1);
static JS::NonnullGCPtr<CanvasGradient> create_conic(JS::Realm&, double start_angle, double x, double y);