2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
82 lines
3.6 KiB
C++
82 lines
3.6 KiB
C++
/*
|
|
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/QuickSort.h>
|
|
#include <LibWeb/Bindings/Intrinsics.h>
|
|
#include <LibWeb/HTML/CanvasGradient.h>
|
|
#include <LibWeb/WebIDL/ExceptionOr.h>
|
|
|
|
namespace Web::HTML {
|
|
|
|
// 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);
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-createlineargradient
|
|
JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_linear(JS::Realm& realm, double x0, double y0, double x1, double y1)
|
|
{
|
|
auto linear_gradient = Gfx::CanvasLinearGradientPaintStyle::create(Gfx::FloatPoint { x0, y0 }, Gfx::FloatPoint { x1, y1 });
|
|
return realm.heap().allocate<CanvasGradient>(realm, realm, *linear_gradient);
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-createconicgradient
|
|
JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_conic(JS::Realm& realm, double start_angle, double x, double y)
|
|
{
|
|
auto conic_gradient = Gfx::CanvasConicGradientPaintStyle::create(Gfx::FloatPoint { x, y }, start_angle);
|
|
return realm.heap().allocate<CanvasGradient>(realm, realm, *conic_gradient);
|
|
}
|
|
|
|
CanvasGradient::CanvasGradient(JS::Realm& realm, Gfx::GradientPaintStyle& gradient)
|
|
: PlatformObject(realm)
|
|
, m_gradient(gradient)
|
|
{
|
|
}
|
|
|
|
CanvasGradient::~CanvasGradient() = default;
|
|
|
|
JS::ThrowCompletionOr<void> CanvasGradient::initialize(JS::Realm& realm)
|
|
{
|
|
MUST_OR_THROW_OOM(Base::initialize(realm));
|
|
set_prototype(&Bindings::ensure_web_prototype<Bindings::CanvasGradientPrototype>(realm, "CanvasGradient"));
|
|
|
|
return {};
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/canvas.html#dom-canvasgradient-addcolorstop
|
|
WebIDL::ExceptionOr<void> CanvasGradient::add_color_stop(double offset, DeprecatedString const& color)
|
|
{
|
|
// 1. If the offset is less than 0 or greater than 1, then throw an "IndexSizeError" DOMException.
|
|
if (offset < 0 || offset > 1)
|
|
return WebIDL::IndexSizeError::create(realm(), "CanvasGradient color stop offset out of bounds");
|
|
|
|
// 2. Let parsed color be the result of parsing color.
|
|
auto parsed_color = Color::from_string(color);
|
|
|
|
// 3. If parsed color is failure, throw a "SyntaxError" DOMException.
|
|
if (!parsed_color.has_value())
|
|
return WebIDL::SyntaxError::create(realm(), "Could not parse color for CanvasGradient");
|
|
|
|
// 4. Place a new stop on the gradient, at offset offset relative to the whole gradient, and with the color parsed color.
|
|
m_gradient->add_color_stop(offset, parsed_color.value());
|
|
|
|
// FIXME: If multiple stops are added at the same offset on a gradient, then they must be placed in the order added,
|
|
// with the first one closest to the start of the gradient, and each subsequent one infinitesimally further along
|
|
// towards the end point (in effect causing all but the first and last stop added at each point to be ignored).
|
|
|
|
return {};
|
|
}
|
|
|
|
}
|