svg/node/element/path/
command.rs

1use super::Parameters;
2use super::Position;
3
4/// A command of a data attribute.
5#[derive(Clone, Debug)]
6pub enum Command {
7    /// [Establish][1] a new current point.
8    ///
9    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataMovetoCommands
10    Move(Position, Parameters),
11
12    /// [Draw][1] straight lines.
13    ///
14    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataLinetoCommands
15    Line(Position, Parameters),
16
17    /// [Draw][1] horizontal lines.
18    ///
19    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataLinetoCommands
20    HorizontalLine(Position, Parameters),
21
22    /// [Draw][1] vertical lines.
23    ///
24    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataLinetoCommands
25    VerticalLine(Position, Parameters),
26
27    /// [Draw][1] a quadratic Bézier curve.
28    ///
29    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataQuadraticBezierCommands
30    QuadraticCurve(Position, Parameters),
31
32    /// [Draw][1] a quadratic Bézier curve assuming the control point to be the
33    /// reflection of the control point on the previous command relative to the
34    /// current point.
35    ///
36    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataQuadraticBezierCommands
37    SmoothQuadraticCurve(Position, Parameters),
38
39    /// [Draw][1] a cubic Bézier curve.
40    ///
41    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataCubicBezierCommands
42    CubicCurve(Position, Parameters),
43
44    /// [Draw][1] a cubic Bézier curve assuming the first control point to be
45    /// the reflection of the second control point on the previous command
46    /// relative to the current point.
47    ///
48    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataCubicBezierCommands
49    SmoothCubicCurve(Position, Parameters),
50
51    /// [Draw][1] an elliptical arc.
52    ///
53    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataEllipticalArcCommands
54    EllipticalArc(Position, Parameters),
55
56    /// [End][1] the current subpath.
57    ///
58    /// [1]: https://www.w3.org/TR/SVG/paths.html#PathDataClosePathCommand
59    Close,
60}
61
62macro_rules! implement {
63    ($($command:ident($position:ident) => $letter:expr,)*) => (
64        impl From<Command> for String {
65            fn from(command: Command) -> Self {
66                use self::Command::*;
67                use super::Position::*;
68                match command {
69                    $($command($position, parameters) => {
70                        format!(concat!($letter, "{}"), String::from(parameters))
71                    })*
72                    Close => String::from("z"),
73                }
74            }
75        }
76    );
77}
78
79implement! {
80    Move(Absolute) => "M",
81    Move(Relative) => "m",
82    Line(Absolute) => "L",
83    Line(Relative) => "l",
84    HorizontalLine(Absolute) => "H",
85    HorizontalLine(Relative) => "h",
86    VerticalLine(Absolute) => "V",
87    VerticalLine(Relative) => "v",
88    QuadraticCurve(Absolute) => "Q",
89    QuadraticCurve(Relative) => "q",
90    SmoothQuadraticCurve(Absolute) => "T",
91    SmoothQuadraticCurve(Relative) => "t",
92    CubicCurve(Absolute) => "C",
93    CubicCurve(Relative) => "c",
94    SmoothCubicCurve(Absolute) => "S",
95    SmoothCubicCurve(Relative) => "s",
96    EllipticalArc(Absolute) => "A",
97    EllipticalArc(Relative) => "a",
98}
svg/node/element/path/command.rs

svg/node/element/path/
command.rs
