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c37820b898
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/QuickSort.h>
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#include <LibWeb/DOM/ExceptionOr.h>
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#include <LibWeb/HTML/CanvasGradient.h>
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namespace Web::HTML {
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NonnullRefPtr<CanvasGradient> CanvasGradient::create_radial(double x0, double y0, double r0, double x1, double y1, double r1)
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{
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(void)x0;
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(void)y0;
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(void)r0;
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(void)x1;
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(void)y1;
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(void)r1;
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return adopt_ref(*new CanvasGradient(Type::Radial));
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}
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NonnullRefPtr<CanvasGradient> CanvasGradient::create_linear(double x0, double y0, double x1, double y1)
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{
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(void)x0;
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(void)y0;
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(void)x1;
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(void)y1;
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return adopt_ref(*new CanvasGradient(Type::Linear));
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}
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NonnullRefPtr<CanvasGradient> CanvasGradient::create_conic(double start_angle, double x, double y)
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{
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(void)start_angle;
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(void)x;
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(void)y;
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return adopt_ref(*new CanvasGradient(Type::Conic));
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}
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CanvasGradient::CanvasGradient(Type type)
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: m_type(type)
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{
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}
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CanvasGradient::~CanvasGradient() = default;
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// https://html.spec.whatwg.org/multipage/canvas.html#dom-canvasgradient-addcolorstop
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DOM::ExceptionOr<void> CanvasGradient::add_color_stop(double offset, String const& color)
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{
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// 1. If the offset is less than 0 or greater than 1, then throw an "IndexSizeError" DOMException.
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if (offset < 0 || offset > 1)
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return DOM::IndexSizeError::create("CanvasGradient color stop offset out of bounds");
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// 2. Let parsed color be the result of parsing color.
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auto parsed_color = Color::from_string(color);
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// 3. If parsed color is failure, throw a "SyntaxError" DOMException.
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if (!parsed_color.has_value())
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return DOM::SyntaxError::create("Could not parse color for CanvasGradient");
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// 4. Place a new stop on the gradient, at offset offset relative to the whole gradient, and with the color parsed color.
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m_color_stops.append(ColorStop { offset, parsed_color.value() });
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// FIXME: If multiple stops are added at the same offset on a gradient, then they must be placed in the order added,
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// with the first one closest to the start of the gradient, and each subsequent one infinitesimally further along
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// towards the end point (in effect causing all but the first and last stop added at each point to be ignored).
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quick_sort(m_color_stops, [](auto& a, auto& b) { return a.offset < b.offset; });
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return {};
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}
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}
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