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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/SVG/AttributeNames.h>
#include <LibWeb/SVG/AttributeParser.h>
#include <LibWeb/SVG/SVGLinearGradientElement.h>
#include <LibWeb/SVG/SVGStopElement.h>
namespace Web::SVG {
SVGLinearGradientElement::SVGLinearGradientElement(DOM::Document& document, DOM::QualifiedName qualified_name)
: SVGGradientElement(document, qualified_name)
{
}
JS::ThrowCompletionOr<void> SVGLinearGradientElement::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::SVGLinearGradientElementPrototype>(realm, "SVGLinearGradientElement"));
return {};
}
void SVGLinearGradientElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)
{
SVGGradientElement::parse_attribute(name, value);
// FIXME: Should allow for `<number-percentage> | <length>` for x1, x2, y1, y2
if (name == SVG::AttributeNames::x1) {
m_x1 = AttributeParser::parse_number_percentage(value);
m_paint_style = nullptr;
} else if (name == SVG::AttributeNames::y1) {
m_y1 = AttributeParser::parse_number_percentage(value);
m_paint_style = nullptr;
} else if (name == SVG::AttributeNames::x2) {
m_x2 = AttributeParser::parse_number_percentage(value);
m_paint_style = nullptr;
} else if (name == SVG::AttributeNames::y2) {
m_y2 = AttributeParser::parse_number_percentage(value);
m_paint_style = nullptr;
}
}
// https://www.w3.org/TR/SVG11/pservers.html#LinearGradientElementX1Attribute
NumberPercentage SVGLinearGradientElement::start_x() const
{
if (m_x1.has_value())
return *m_x1;
if (auto href = linear_gradient_xlink_href())
return href->start_x();
// If the attribute is not specified, the effect is as if a value of '0%' were specified.
return NumberPercentage::create_percentage(0);
}
// https://www.w3.org/TR/SVG11/pservers.html#LinearGradientElementY1Attribute
NumberPercentage SVGLinearGradientElement::start_y() const
{
if (m_y1.has_value())
return *m_y1;
if (auto href = linear_gradient_xlink_href())
return href->start_x();
// If the attribute is not specified, the effect is as if a value of '0%' were specified.
return NumberPercentage::create_percentage(0);
}
// https://www.w3.org/TR/SVG11/pservers.html#LinearGradientElementX2Attribute
NumberPercentage SVGLinearGradientElement::end_x() const
{
if (m_x2.has_value())
return *m_x2;
if (auto href = linear_gradient_xlink_href())
return href->start_x();
// If the attribute is not specified, the effect is as if a value of '100%' were specified.
return NumberPercentage::create_percentage(100);
}
// https://www.w3.org/TR/SVG11/pservers.html#LinearGradientElementY2Attribute
NumberPercentage SVGLinearGradientElement::end_y() const
{
if (m_y2.has_value())
return *m_y2;
if (auto href = linear_gradient_xlink_href())
return href->start_x();
// If the attribute is not specified, the effect is as if a value of '0%' were specified.
return NumberPercentage::create_percentage(0);
}
Optional<Gfx::PaintStyle const&> SVGLinearGradientElement::to_gfx_paint_style(SVGPaintContext const& paint_context) const
{
auto units = gradient_units();
// FIXME: Resolve percentages properly
Gfx::FloatPoint start_point {};
Gfx::FloatPoint end_point {};
// https://svgwg.org/svg2-draft/pservers.html#LinearGradientElementGradientUnitsAttribute
if (units == GradientUnits::ObjectBoundingBox) {
// If gradientUnits="objectBoundingBox", the user coordinate system for attributes ‘x1’, ‘y1’, ‘x2’ and ‘y2’
// is established using the bounding box of the element to which the gradient is applied (see Object bounding
// box units) and then applying the transform specified by attribute ‘gradientTransform’. Percentages represent
// values relative to the bounding box for the object.
// Note: For gradientUnits="objectBoundingBox" both "100%" and "1" are treated the same.
start_point = paint_context.path_bounding_box.location() + Gfx::FloatPoint { start_x().value() * paint_context.path_bounding_box.width(), start_y().value() * paint_context.path_bounding_box.height() };
end_point = paint_context.path_bounding_box.location() + Gfx::FloatPoint { end_x().value() * paint_context.path_bounding_box.width(), end_y().value() * paint_context.path_bounding_box.height() };
} else {
// GradientUnits::UserSpaceOnUse
// If gradientUnits="userSpaceOnUse", ‘x1’, ‘y1’, ‘x2’, and ‘y2’ represent values in the coordinate system
// that results from taking the current user coordinate system in place at the time when the gradient element
// is referenced (i.e., the user coordinate system for the element referencing the gradient element via a
// fill or stroke property) and then applying the transform specified by attribute ‘gradientTransform’.
// Percentages represent values relative to the current SVG viewport.
start_point = Gfx::FloatPoint {
start_x().resolve_relative_to(paint_context.viewport.width()),
start_y().resolve_relative_to(paint_context.viewport.height()),
};
end_point = Gfx::FloatPoint {
end_x().resolve_relative_to(paint_context.viewport.width()),
end_y().resolve_relative_to(paint_context.viewport.height()),
};
}
if (!m_paint_style) {
m_paint_style = Gfx::SVGLinearGradientPaintStyle::create(start_point, end_point)
.release_value_but_fixme_should_propagate_errors();
// FIXME: Update this if DOM changes?
for_each_color_stop([&](auto& stop) {
m_paint_style->add_color_stop(stop.stop_offset().value(), stop.stop_color()).release_value_but_fixme_should_propagate_errors();
});
} else {
m_paint_style->set_start_point(start_point);
m_paint_style->set_end_point(end_point);
}
auto gradient_affine_transform = gradient_transform().value_or(Gfx::AffineTransform {});
if (units == GradientUnits::ObjectBoundingBox) {
// Adjust transform to take place in the coordinate system defined by the bounding box:
gradient_affine_transform = Gfx::AffineTransform {}
.translate(paint_context.path_bounding_box.location())
.scale(paint_context.path_bounding_box.width(), paint_context.path_bounding_box.height())
.multiply(gradient_affine_transform)
.scale(1 / paint_context.path_bounding_box.width(), 1 / paint_context.path_bounding_box.height())
.translate(-paint_context.path_bounding_box.location());
}
m_paint_style->set_gradient_transform(Gfx::AffineTransform { paint_context.transform }.multiply(gradient_affine_transform));
return *m_paint_style;
}
JS::NonnullGCPtr<SVGAnimatedLength> SVGLinearGradientElement::x1() const
{
TODO();
}
JS::NonnullGCPtr<SVGAnimatedLength> SVGLinearGradientElement::y1() const
{
TODO();
}
JS::NonnullGCPtr<SVGAnimatedLength> SVGLinearGradientElement::x2() const
{
TODO();
}
JS::NonnullGCPtr<SVGAnimatedLength> SVGLinearGradientElement::y2() const
{
TODO();
}
}
|
