1 files changed, 60 insertions, 0 deletions
diff --git a/crates/typst-layout/src/repeat.rs b/crates/typst-layout/src/repeat.rs
new file mode 100644
index 00000000..b761438c
--- /dev/null
+++ b/crates/typst-layout/src/repeat.rs
@@ -0,0 +1,60 @@
+use typst_library::diag::{bail, SourceResult};
+use typst_library::engine::Engine;
+use typst_library::foundations::{Packed, Resolve, StyleChain};
+use typst_library::introspection::Locator;
+use typst_library::layout::{
+    Abs, AlignElem, Axes, Frame, Point, Region, RepeatElem, Size,
+};
+use typst_utils::Numeric;
+
+/// Layout the repeated content.
+#[typst_macros::time(span = elem.span())]
+pub fn layout_repeat(
+    elem: &Packed<RepeatElem>,
+    engine: &mut Engine,
+    locator: Locator,
+    styles: StyleChain,
+    region: Region,
+) -> SourceResult<Frame> {
+    let pod = Region::new(region.size, Axes::new(false, false));
+    let piece = crate::layout_frame(engine, &elem.body, locator, styles, pod)?;
+    let size = Size::new(region.size.x, piece.height());
+
+    if !size.is_finite() {
+        bail!(elem.span(), "repeat with no size restrictions");
+    }
+
+    let mut frame = Frame::soft(size);
+    if piece.has_baseline() {
+        frame.set_baseline(piece.baseline());
+    }
+
+    let mut gap = elem.gap(styles).resolve(styles);
+    let fill = region.size.x;
+    let width = piece.width();
+
+    // count * width + (count - 1) * gap = fill, but count is an integer so
+    // we need to round down and get the remainder.
+    let count = ((fill + gap) / (width + gap)).floor();
+    let remaining = (fill + gap) % (width + gap);
+
+    let justify = elem.justify(styles);
+    if justify {
+        gap += remaining / (count - 1.0);
+    }
+
+    let align = AlignElem::alignment_in(styles).resolve(styles);
+    let mut offset = Abs::zero();
+    if count == 1.0 || !justify {
+        offset += align.x.position(remaining);
+    }
+
+    if width > Abs::zero() {
+        for _ in 0..(count as usize).min(1000) {
+            frame.push_frame(Point::with_x(offset), piece.clone());
+            offset += piece.width() + gap;
+        }
+    }
+
+    Ok(frame)
+}