Commit d9ea057da7515d9c04cf4b7e62287edea50c7f22 | snowbound

author	clover caruso <git@paperclover.net> 2026-10-02 02:18:47-07:00
committer	clover caruso <git@paperclover.net> 2026-10-02 03:11:20-07:00
log	d9ea057da7515d9c04cf4b7e62287edea50c7f22
tree	d0b46eb024ad03b71407f5e73c5eed04cf2c4451
parent	0aabcf30b762dc823a9b403a7a514e5a86f62fd5
signature	Signed by SSH key SHA256:52mNGHRsVFBDED9IAX5pe+LRWUefqTbxEReunq21QvU

fix: the sidebar opens on its folds as they stand

Every notebook and section group eased open from nothing each time the
sidebar opened, and again as a notebook's sections arrived, because the
rows' height was unknown on the frame they first showed. Rows that
appear with the tree now show at once, open or folded as they were left;
only folding or unfolding one eases.

Assisted-by: claude-opus-5.5

1 files changed, 18 insertions(+), 9 deletions(-)

crates
- snowbound
  - src
    sidebar.rs

crates/snowbound/src/sidebar.rs+18-9

 @@ -538,22 +538,31 @@ fn gap(ui: &mut Ui, tree: &mut Tree, folder: &str, before: Option<&str>) {
 }
 /// Opens the boxes a notebook's or group's rows ease open and shut in, where they show:
-/// the caller builds the rows and closes both.
+/// the caller builds the rows and closes both. Rows appearing with the tree, as the sidebar
+/// opens or a notebook's sections arrive, show as they stand; only a toggle eases.
 fn unfolding(ui: &mut Ui, part: impl std::hash::Hash, unfolded: bool) -> bool {
     let outer = ui.id(part);
-    let rows = ui
+    let height = if ui.lasted(outer.child("shown"), true).is_zero() {
-        .rect(outer.child("rows"))
+        if !unfolded {
-        .map_or(0.0, |rect| rect[3] - rect[1]);
+            return false;
-    let height = ui.animate(outer, if unfolded { rows } else { 0.0 });
+        }
-    if !unfolded && height == 0.0 {
+        ui::children()
-        return false;
+    } else {
-    }
+        let rows = ui
+            .rect(outer.child("rows"))
+            .map_or(0.0, |rect| rect[3] - rect[1]);
+        let height = ui.animate(outer, if unfolded { rows } else { 0.0 });
+        if !unfolded && height == 0.0 {
+            return false;
+        }
+        px(height)
+    };
     ui.open_as(
         outer,
         Spec {
             flags: Flags::CLIP,
             axis: Axis::Y,
-            size: [fill(), px(height)],
+            size: [fill(), height],
             ..Spec::default()
         },
     );