Split out four new crates (#5302)

1 files changed, 64 insertions, 0 deletions

diff --git a/crates/typst-library/src/visualize/line.rs b/crates/typst-library/src/visualize/line.rs
new file mode 100644
index 00000000..d9ddab84
--- /dev/null
+++ b/crates/typst-library/src/visualize/line.rs
@@ -0,0 +1,64 @@
+use crate::diag::SourceResult;
+use crate::engine::Engine;
+use crate::foundations::{elem, Content, NativeElement, Packed, Show, StyleChain};
+use crate::layout::{Abs, Angle, Axes, BlockElem, Length, Rel};
+use crate::visualize::Stroke;
+
+/// A line from one point to another.
+///
+/// # Example
+/// ```example
+/// #set page(height: 100pt)
+///
+/// #line(length: 100%)
+/// #line(end: (50%, 50%))
+/// #line(
+///   length: 4cm,
+///   stroke: 2pt + maroon,
+/// )
+/// ```
+#[elem(Show)]
+pub struct LineElem {
+    /// The start point of the line.
+    ///
+    /// Must be an array of exactly two relative lengths.
+    #[resolve]
+    pub start: Axes<Rel<Length>>,
+
+    /// The offset from `start` where the line ends.
+    #[resolve]
+    pub end: Option<Axes<Rel<Length>>>,
+
+    /// The line's length. This is only respected if `end` is `{none}`.
+    #[resolve]
+    #[default(Abs::pt(30.0).into())]
+    pub length: Rel<Length>,
+
+    /// The angle at which the line points away from the origin. This is only
+    /// respected if `end` is `{none}`.
+    pub angle: Angle,
+
+    /// How to [stroke] the line.
+    ///
+    /// ```example
+    /// #set line(length: 100%)
+    /// #stack(
+    ///   spacing: 1em,
+    ///   line(stroke: 2pt + red),
+    ///   line(stroke: (paint: blue, thickness: 4pt, cap: "round")),
+    ///   line(stroke: (paint: blue, thickness: 1pt, dash: "dashed")),
+    ///   line(stroke: (paint: blue, thickness: 1pt, dash: ("dot", 2pt, 4pt, 2pt))),
+    /// )
+    /// ```
+    #[resolve]
+    #[fold]
+    pub stroke: Stroke,
+}
+
+impl Show for Packed<LineElem> {
+    fn show(&self, engine: &mut Engine, _: StyleChain) -> SourceResult<Content> {
+        Ok(BlockElem::single_layouter(self.clone(), engine.routines.layout_line)
+            .pack()
+            .spanned(self.span()))
+    }
+}