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Pathfinder panel: count a group's shapes without copying them

This commit is contained in:
bflatastic 2026-10-13 13:38:40 +07:00
parent 7ea75b01ba
commit f05fbfc292
1 changed files with 11 additions and 5 deletions
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16
crates/engine/src/cmd/pathops.rs
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@ -246,12 +246,17 @@ fn style_of(n: &Node) -> Style {
/// Leaf shapes (paths, compound paths, text) of a subtree in paint order; guides and clipping
/// paths are skipped.
fn leaves(n: &Node, out: &mut Vec<Node>) {
each_leaf(n, &mut |l| out.push(l.clone()));
}
/// Calls `f` with each leaf shape of [`leaves`], in its order.
fn each_leaf(n: &Node, f: &mut impl FnMut(&Node)) {
match &n.kind {
NodeKind::Path { guide: true, .. } | NodeKind::Path { clipping: true, .. } => {}
NodeKind::Path { .. } | NodeKind::Compound { .. } | NodeKind::Text(_) => out.push(n.clone()),
NodeKind::Path { .. } | NodeKind::Compound { .. } | NodeKind::Text(_) => f(n),
NodeKind::Group { children, .. } | NodeKind::Layer { children, .. } => {
for c in children {
leaves(c, out);
each_leaf(c, f);
}
}
_ => {}
@ -261,9 +266,10 @@ fn leaves(n: &Node, out: &mut Vec<Node>) {
/// How many shapes a Pathfinder operation takes from `n` selected alone: its leaf shapes, however
/// deep its groups nest (an expanded stroke is a group inside the group, #1635).
pub fn shape_count(n: &Node) -> usize {
let mut lv = vec![];
leaves(n, &mut lv);
lv.len()
// Counted without copying the shapes: the panel asks every frame.
let mut count = 0;
each_leaf(n, &mut |_| count += 1);
count
}
/// A node for `path`: a plain path for one subpath, else a compound path.