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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "SVGRectElement.h"
#include <LibWeb/SVG/AttributeNames.h>
#include <LibWeb/SVG/AttributeParser.h>
#include <LibWeb/SVG/SVGAnimatedLength.h>
#include <LibWeb/SVG/SVGLength.h>
namespace Web::SVG {
SVGRectElement::SVGRectElement(DOM::Document& document, DOM::QualifiedName qualified_name)
: SVGGeometryElement(document, qualified_name)
{
}
void SVGRectElement::parse_attribute(FlyString const& name, String const& value)
{
SVGGeometryElement::parse_attribute(name, value);
if (name == SVG::AttributeNames::x) {
m_x = AttributeParser::parse_coordinate(value);
m_path.clear();
} else if (name == SVG::AttributeNames::y) {
m_y = AttributeParser::parse_coordinate(value);
m_path.clear();
} else if (name == SVG::AttributeNames::width) {
m_width = AttributeParser::parse_positive_length(value);
m_path.clear();
} else if (name == SVG::AttributeNames::height) {
m_height = AttributeParser::parse_positive_length(value);
m_path.clear();
} else if (name == SVG::AttributeNames::rx) {
m_radius_x = AttributeParser::parse_length(value);
m_path.clear();
} else if (name == SVG::AttributeNames::ry) {
m_radius_y = AttributeParser::parse_length(value);
m_path.clear();
}
}
Gfx::Path& SVGRectElement::get_path()
{
if (m_path.has_value())
return m_path.value();
float width = m_width.value_or(0);
float height = m_height.value_or(0);
float x = m_x.value_or(0);
float y = m_y.value_or(0);
Gfx::Path path;
// If width or height is zero, rendering is disabled.
if (width == 0 && height == 0) {
m_path = move(path);
return m_path.value();
}
auto corner_radii = calculate_used_corner_radius_values();
float rx = corner_radii.x();
float ry = corner_radii.y();
// 1. perform an absolute moveto operation to location (x+rx,y);
path.move_to({ x + rx, y });
// 2, perform an absolute horizontal lineto with parameter x+width-rx;
path.horizontal_line_to(x + width - rx);
// 3. if both rx and ry are greater than zero,
// perform an absolute elliptical arc operation to coordinate (x+width,y+ry),
// where rx and ry are used as the equivalent parameters to the elliptical arc command,
// the x-axis-rotation and large-arc-flag are set to zero,
// the sweep-flag is set to one;
double x_axis_rotation = 0;
bool large_arc_flag = false;
bool sweep_flag = true;
if (rx > 0 && ry > 0)
path.elliptical_arc_to({ x + width, y + ry }, corner_radii, x_axis_rotation, large_arc_flag, sweep_flag);
// 4. perform an absolute vertical lineto parameter y+height-ry;
path.vertical_line_to(y + height - ry);
// 5. if both rx and ry are greater than zero,
// perform an absolute elliptical arc operation to coordinate (x+width-rx,y+height),
// using the same parameters as previously;
if (rx > 0 && ry > 0)
path.elliptical_arc_to({ x + width - rx, y + height }, corner_radii, x_axis_rotation, large_arc_flag, sweep_flag);
// 6. perform an absolute horizontal lineto parameter x+rx;
path.horizontal_line_to(x + rx);
// 7. if both rx and ry are greater than zero,
// perform an absolute elliptical arc operation to coordinate (x,y+height-ry),
// using the same parameters as previously;
if (rx > 0 && ry > 0)
path.elliptical_arc_to({ x, y + height - ry }, corner_radii, x_axis_rotation, large_arc_flag, sweep_flag);
// 8. perform an absolute vertical lineto parameter y+ry
path.vertical_line_to(y + ry);
// 9. if both rx and ry are greater than zero,
// perform an absolute elliptical arc operation with a segment-completing close path operation,
// using the same parameters as previously.
if (rx > 0 && ry > 0)
path.elliptical_arc_to({ x + rx, y }, corner_radii, x_axis_rotation, large_arc_flag, sweep_flag);
m_path = move(path);
return m_path.value();
}
Gfx::FloatPoint SVGRectElement::calculate_used_corner_radius_values()
{
// 1. Let rx and ry be length values.
float rx = 0;
float ry = 0;
// 2. If neither ‘rx’ nor ‘ry’ are properly specified, then set both rx and ry to 0. (This will result in square corners.)
if (!m_radius_x.has_value() && !m_radius_y.has_value()) {
rx = 0;
ry = 0;
}
// 3. Otherwise, if a properly specified value is provided for ‘rx’, but not for ‘ry’, then set both rx and ry to the value of ‘rx’.
else if (m_radius_x.has_value()) {
rx = m_radius_x.value();
ry = m_radius_x.value();
}
// 4. Otherwise, if a properly specified value is provided for ‘ry’, but not for ‘rx’, then set both rx and ry to the value of ‘ry’.
else if (m_radius_y.has_value()) {
rx = m_radius_y.value();
ry = m_radius_y.value();
}
// 5. Otherwise, both ‘rx’ and ‘ry’ were specified properly. Set rx to the value of ‘rx’ and ry to the value of ‘ry’.
else {
rx = m_radius_x.value();
ry = m_radius_y.value();
}
// 6. If rx is greater than half of ‘width’, then set rx to half of ‘width’.
auto half_width = m_width.value_or(0) / 2;
if (rx > half_width)
rx = half_width;
// 7. If ry is greater than half of ‘height’, then set ry to half of ‘height’.
auto half_height = m_height.value_or(0) / 2;
if (ry > half_height)
ry = half_height;
// 8. The effective values of ‘rx’ and ‘ry’ are rx and ry, respectively.
return Gfx::FloatPoint { rx, ry };
}
// https://www.w3.org/TR/SVG11/shapes.html#RectElementXAttribute
NonnullRefPtr<SVGAnimatedLength> SVGRectElement::x() const
{
// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
// FIXME: Create a proper animated value when animations are supported.
auto base_length = SVGLength::create(0, m_x.value_or(0));
auto anim_length = SVGLength::create(0, m_x.value_or(0));
return SVGAnimatedLength::create(move(base_length), move(anim_length));
}
// https://www.w3.org/TR/SVG11/shapes.html#RectElementYAttribute
NonnullRefPtr<SVGAnimatedLength> SVGRectElement::y() const
{
// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
// FIXME: Create a proper animated value when animations are supported.
auto base_length = SVGLength::create(0, m_y.value_or(0));
auto anim_length = SVGLength::create(0, m_y.value_or(0));
return SVGAnimatedLength::create(move(base_length), move(anim_length));
}
// https://www.w3.org/TR/SVG11/shapes.html#RectElementWidthAttribute
NonnullRefPtr<SVGAnimatedLength> SVGRectElement::width() const
{
// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
// FIXME: Create a proper animated value when animations are supported.
auto base_length = SVGLength::create(0, m_width.value_or(0));
auto anim_length = SVGLength::create(0, m_width.value_or(0));
return SVGAnimatedLength::create(move(base_length), move(anim_length));
}
// https://www.w3.org/TR/SVG11/shapes.html#RectElementHeightAttribute
NonnullRefPtr<SVGAnimatedLength> SVGRectElement::height() const
{
// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
// FIXME: Create a proper animated value when animations are supported.
auto base_length = SVGLength::create(0, m_height.value_or(0));
auto anim_length = SVGLength::create(0, m_height.value_or(0));
return SVGAnimatedLength::create(move(base_length), move(anim_length));
}
// https://www.w3.org/TR/SVG11/shapes.html#RectElementRXAttribute
NonnullRefPtr<SVGAnimatedLength> SVGRectElement::rx() const
{
// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
// FIXME: Create a proper animated value when animations are supported.
auto base_length = SVGLength::create(0, m_radius_x.value_or(0));
auto anim_length = SVGLength::create(0, m_radius_x.value_or(0));
return SVGAnimatedLength::create(move(base_length), move(anim_length));
}
// https://www.w3.org/TR/SVG11/shapes.html#RectElementRYAttribute
NonnullRefPtr<SVGAnimatedLength> SVGRectElement::ry() const
{
// FIXME: Populate the unit type when it is parsed (0 here is "unknown").
// FIXME: Create a proper animated value when animations are supported.
auto base_length = SVGLength::create(0, m_radius_y.value_or(0));
auto anim_length = SVGLength::create(0, m_radius_y.value_or(0));
return SVGAnimatedLength::create(move(base_length), move(anim_length));
}
}
|
