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use super::*;
/// The top-level layout node.
#[derive(Debug, Clone, PartialEq)]
pub struct Document {
pub runs: Vec<Pages>,
}
impl Document {
/// Layout the document.
pub async fn layout(&self, ctx: &mut LayoutContext) -> Vec<BoxLayout> {
let mut layouts = vec![];
for run in &self.runs {
layouts.extend(run.layout(ctx).await);
}
layouts
}
}
/// A variable-length run of pages that all have the same properties.
#[derive(Debug, Clone, PartialEq)]
pub struct Pages {
/// The size of the pages.
pub size: Size,
/// The layout node that produces the actual pages.
pub child: LayoutNode,
}
impl Pages {
/// Layout the page run.
pub async fn layout(&self, ctx: &mut LayoutContext) -> Vec<BoxLayout> {
let constraints = LayoutConstraints {
spaces: vec![LayoutSpace { base: self.size, size: self.size }],
repeat: true,
};
self.child
.layout(ctx, constraints)
.await
.into_iter()
.filter_map(|item| match item {
LayoutItem::Spacing(_) => None,
LayoutItem::Box(layout, _) => Some(layout),
})
.collect()
}
}
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