mirror of
https://github.com/RGBCube/serenity
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76 lines
2.8 KiB
C++
76 lines
2.8 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/HTML/CanvasGradient.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::HTML {
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JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_radial(HTML::Window& window, 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 *window.heap().allocate<CanvasGradient>(window.realm(), window, Type::Radial);
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}
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JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_linear(HTML::Window& window, 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 *window.heap().allocate<CanvasGradient>(window.realm(), window, Type::Linear);
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}
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JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_conic(HTML::Window& window, 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 *window.heap().allocate<CanvasGradient>(window.realm(), window, Type::Conic);
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}
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CanvasGradient::CanvasGradient(HTML::Window& window, Type type)
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: PlatformObject(window.realm())
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, m_type(type)
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{
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set_prototype(&window.cached_web_prototype("CanvasGradient"));
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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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WebIDL::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 WebIDL::IndexSizeError::create(global_object(), "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 WebIDL::SyntaxError::create(global_object(), "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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