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fix: culled items not appearning after window resize

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When a window resizes larger such that content no longer needs
scrolling, scroll_opt retains its stale offset value. Since no scroll
event fires, visible_rect was calculated with an out-of-bounds offset,
causing items at the top to be culled and not rendered.

Fix by caching content_height from each render pass and using it to
clamp scroll_opt when building visible_rect.
This commit is contained in:
Hojjat 2026-01-06 11:28:40 -07:00 • committed by Jacob Kauffmann
parent a4d1548a33
commit 092d25d860
1 changed files with 30 additions and 8 deletions
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38
src/tab.rs
View file

@ -2569,6 +2569,7 @@ pub struct Tab {
pub mode: Mode,
pub scroll_opt: Option<AbsoluteOffset>,
pub size_opt: Cell<Option<Size>>,
pub content_height_opt: Cell<Option<f32>>,
pub viewport_opt: Option<Rectangle>,
pub item_view_size_opt: Cell<Option<Size>>,
pub edit_location: Option<EditLocation>,
@ -2690,6 +2691,7 @@ impl Tab {
mode: Mode::App,
scroll_opt: None,
size_opt: Cell::new(None),
content_height_opt: Cell::new(None),
viewport_opt: None,
item_view_size_opt: Cell::new(None),
edit_location: None,
@ -5032,10 +5034,17 @@ impl Tab {
//TODO: move to function
let visible_rect = {
let point = match self.scroll_opt {
Some(offset) => Point::new(0.0, offset.y),
None => Point::new(0.0, 0.0),
};
// Use cached content height to clamp scroll offset after resize
let max_scroll_y = self
.content_height_opt
.get()
.map(|ch| (ch - height as f32).max(0.0))
.unwrap_or(f32::MAX);
let scroll_y = self
.scroll_opt
.map(|o| o.y.min(max_scroll_y).max(0.0))
.unwrap_or(0.0);
let point = Point::new(0.0, scroll_y);
let size = self.size_opt.get().unwrap_or_else(|| Size::new(0.0, 0.0));
Rectangle::new(point, size)
};
@ -5216,6 +5225,9 @@ impl Tab {
}
}
// Cache content height for scroll clamping on next frame
self.content_height_opt.set(Some(max_bottom as f32));
let top_deduct = 7 * (space_xxs as usize);
self.item_view_size_opt
@ -5347,10 +5359,17 @@ impl Tab {
//TODO: move to function
let visible_rect = {
let point = match self.scroll_opt {
Some(offset) => Point::new(0.0, offset.y),
None => Point::new(0.0, 0.0),
};
// Use cached content height to clamp scroll offset after resize
let max_scroll_y = self
.content_height_opt
.get()
.map(|ch| (ch - size.height).max(0.0))
.unwrap_or(f32::MAX);
let scroll_y = self
.scroll_opt
.map(|o| o.y.min(max_scroll_y).max(0.0))
.unwrap_or(0.0);
let point = Point::new(0.0, scroll_y);
let size = self.size_opt.get().unwrap_or_else(|| Size::new(0.0, 0.0));
Rectangle::new(point, size)
};
@ -5658,6 +5677,9 @@ impl Tab {
if count == 0 {
return (None, self.empty_view(hidden > 0), false);
}
// Cache content height for scroll clamping on next frame
self.content_height_opt.set(Some(y));
}
//TODO: HACK If we don't reach the bottom of the view, go ahead and add a spacer to do that
{