summaryrefslogtreecommitdiff
path: root/src/library/columns.rs
diff options
context:
space:
mode:
Diffstat (limited to 'src/library/columns.rs')
-rw-r--r--src/library/columns.rs113
1 files changed, 0 insertions, 113 deletions
diff --git a/src/library/columns.rs b/src/library/columns.rs
deleted file mode 100644
index 3ce9b6e5..00000000
--- a/src/library/columns.rs
+++ /dev/null
@@ -1,113 +0,0 @@
-//! Multi-column layouts.
-
-use super::prelude::*;
-use super::ParNode;
-
-/// Separate a region into multiple equally sized columns.
-#[derive(Debug, Hash)]
-pub struct ColumnsNode {
- /// How many columns there should be.
- pub columns: NonZeroUsize,
- /// The child to be layouted into the columns. Most likely, this should be a
- /// flow or stack node.
- pub child: LayoutNode,
-}
-
-#[class]
-impl ColumnsNode {
- /// The size of the gutter space between each column.
- pub const GUTTER: Linear = Relative::new(0.04).into();
-
- fn construct(_: &mut Context, args: &mut Args) -> TypResult<Template> {
- Ok(Template::block(Self {
- columns: args.expect("column count")?,
- child: args.expect("body")?,
- }))
- }
-}
-
-impl Layout for ColumnsNode {
- fn layout(
- &self,
- ctx: &mut Context,
- regions: &Regions,
- styles: StyleChain,
- ) -> TypResult<Vec<Arc<Frame>>> {
- // Separating the infinite space into infinite columns does not make
- // much sense.
- if regions.first.x.is_infinite() {
- return self.child.layout(ctx, regions, styles);
- }
-
- // Determine the width of the gutter and each column.
- let columns = self.columns.get();
- let gutter = styles.get(Self::GUTTER).resolve(regions.base.x);
- let width = (regions.first.x - gutter * (columns - 1) as f64) / columns as f64;
-
- // Create the pod regions.
- let pod = Regions {
- first: Size::new(width, regions.first.y),
- base: Size::new(width, regions.base.y),
- backlog: std::iter::once(&regions.first.y)
- .chain(regions.backlog.as_slice())
- .flat_map(|&height| std::iter::repeat(height).take(columns))
- .skip(1)
- .collect(),
- last: regions.last,
- expand: Spec::new(true, regions.expand.y),
- };
-
- // Layout the children.
- let mut frames = self.child.layout(ctx, &pod, styles)?.into_iter();
-
- let dir = styles.get(ParNode::DIR);
- let total_regions = (frames.len() as f32 / columns as f32).ceil() as usize;
- let mut finished = vec![];
-
- // Stitch together the columns for each region.
- for region in regions.iter().take(total_regions) {
- // The height should be the parent height if the node shall expand.
- // Otherwise its the maximum column height for the frame. In that
- // case, the frame is first created with zero height and then
- // resized.
- let height = if regions.expand.y { region.y } else { Length::zero() };
- let mut output = Frame::new(Size::new(regions.first.x, height));
- let mut cursor = Length::zero();
-
- for _ in 0 .. columns {
- let frame = match frames.next() {
- Some(frame) => frame,
- None => break,
- };
-
- if !regions.expand.y {
- output.size.y.set_max(frame.size.y);
- }
-
- let width = frame.size.x;
- let x = if dir.is_positive() {
- cursor
- } else {
- regions.first.x - cursor - width
- };
-
- output.push_frame(Point::with_x(x), frame);
- cursor += width + gutter;
- }
-
- finished.push(Arc::new(output));
- }
-
- Ok(finished)
- }
-}
-
-/// A column break.
-pub struct ColbreakNode;
-
-#[class]
-impl ColbreakNode {
- fn construct(_: &mut Context, _: &mut Args) -> TypResult<Template> {
- Ok(Template::Colbreak)
- }
-}