From 9d48625995fc63c99e0164e424f78bcea3ac8a47 Mon Sep 17 00:00:00 2001
From: "Dylan M. Taylor" <dylan@dylanmtaylor.com>
Date: Wed, 11 Nov 2026 18:57:25 +0000
Subject: [PATCH] layout: leave out a grid that would pass the snap budget

---
 crates/layout/src/depth_tests.rs | 2 +-
 crates/layout/src/lib.rs         | 8 +++++---
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/crates/layout/src/depth_tests.rs b/crates/layout/src/depth_tests.rs
index b533c7e42..20e022817 100644
--- a/crates/layout/src/depth_tests.rs
+++ b/crates/layout/src/depth_tests.rs
@@ -102,6 +102,6 @@ fn snap_lines_are_bounded_across_a_frames_grids() {
     let f = d.create(p, NodeKind::Frame, "F", 0.0, 0.0, 4000.0, 4000.0).unwrap();
     d.get_mut(f).unwrap().grids = vec![LayoutGrid { kind: GridKind::Grid, size: 1.0, visible: true, ..LayoutGrid::default() }; 1000];
     let (xs, ys) = crate::grid_snap_lines(&d, f);
-    assert!(xs.len() + ys.len() < 250_000, "{}", xs.len() + ys.len());
+    assert!(xs.len() + ys.len() <= 200_000, "{}", xs.len() + ys.len());
     assert!(xs.len() > 4000 && ys.len() > 4000, "the first grids still give their lines");
 }
diff --git a/crates/layout/src/lib.rs b/crates/layout/src/lib.rs
index 04abbc39a..b3d8e27f0 100644
--- a/crates/layout/src/lib.rs
+++ b/crates/layout/src/lib.rs
@@ -1169,11 +1169,13 @@ pub fn grid_snap_lines_in(doc: &Document, frame: NodeId, xf: Affine) -> (Vec<f64
     let mut xs = Vec::new();
     let mut ys = Vec::new();
     for g in f.grids.iter().filter(|g| g.visible) {
-        // A frame-wide budget: each grid adds up to ~17,000 lines, and a file can hold any number of grids.
-        if xs.len() + ys.len() >= MAX_SNAP_LINES {
+        // A frame-wide budget: each grid adds up to ~17,000 lines, and a file can hold any number of grids;
+        // a grid that would pass it is left out whole.
+        let lines = grid_lines(g, f.width, f.height);
+        if xs.len() + ys.len() + 2 * lines.len() > MAX_SNAP_LINES {
             break;
         }
-        for r in grid_lines(g, f.width, f.height) {
+        for r in lines {
             let a = xf * Point::new(r.x0, r.y0);
             let b = xf * Point::new(r.x1, r.y1);
             match g.kind {