1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* 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 {
JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_radial(JS::Realm& realm, double x0, double y0, double r0, double x1, double y1, double r1)
{
(void)x0;
(void)y0;
(void)r0;
(void)x1;
(void)y1;
(void)r1;
return *realm.heap().allocate<CanvasGradient>(realm, realm, Type::Radial);
}
JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_linear(JS::Realm& realm, double x0, double y0, double x1, double y1)
{
(void)x0;
(void)y0;
(void)x1;
(void)y1;
return *realm.heap().allocate<CanvasGradient>(realm, realm, Type::Linear);
}
JS::NonnullGCPtr<CanvasGradient> CanvasGradient::create_conic(JS::Realm& realm, double start_angle, double x, double y)
{
(void)start_angle;
(void)x;
(void)y;
return *realm.heap().allocate<CanvasGradient>(realm, realm, Type::Conic);
}
CanvasGradient::CanvasGradient(JS::Realm& realm, Type type)
: PlatformObject(realm)
, m_type(type)
{
set_prototype(&Bindings::cached_web_prototype(realm, "CanvasGradient"));
}
CanvasGradient::~CanvasGradient() = default;
// 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_color_stops.append(ColorStop { 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).
quick_sort(m_color_stops, [](auto& a, auto& b) { return a.offset < b.offset; });
return {};
}
}
|
