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use crate::func::prelude::*;
use super::maps::ConsistentMap;
use super::keys::{AxisKey, AlignmentKey};
function! {
/// `align`: Aligns content along the layouting axes.
#[derive(Debug, PartialEq)]
pub struct Align {
body: Option<SyntaxTree>,
map: ConsistentMap<Key, AlignmentKey>,
}
parse(args, body, ctx) {
let mut map = ConsistentMap::new();
map.add_opt_span(Key::First, args.get_pos_opt::<AlignmentKey>()?)?;
map.add_opt_span(Key::Second, args.get_pos_opt::<AlignmentKey>()?)?;
for arg in args.keys() {
let axis = AxisKey::from_ident(&arg.v.key)?;
let value = AlignmentKey::from_expr(arg.v.value)?;
map.add(Key::Axis(axis), value)?;
}
Align {
body: parse!(optional: body, ctx),
map,
}
}
layout(self, mut ctx) {
let axes = ctx.axes;
let map = self.map.dedup(|key, alignment| {
let axis = match key {
Key::First => alignment.axis(axes, GenericAxisKind::Primary),
Key::Second => alignment.axis(axes, GenericAxisKind::Secondary),
Key::Axis(AxisKey::Primary) => GenericAxisKind::Primary,
Key::Axis(AxisKey::Secondary) => GenericAxisKind::Secondary,
Key::Axis(AxisKey::Horizontal) => axes.horizontal(),
Key::Axis(AxisKey::Vertical) => axes.vertical(),
};
let alignment = alignment.generic(axes, axis)?;
Ok((axis, alignment))
})?;
map.with(GenericAxisKind::Primary, |&val| ctx.alignment.primary = val);
map.with(GenericAxisKind::Secondary, |&val| ctx.alignment.secondary = val);
match &self.body {
Some(body) => vec![AddMultiple(layout_tree(&body, ctx)?)],
None => vec![Command::SetAlignment(ctx.alignment)],
}
}
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
enum Key {
First,
Second,
Axis(AxisKey),
}
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