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fix(tui/history): keep virtualization frozen for tail-only views

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This commit is contained in:
James Peter
2026-01-01 14:21:14 +10:00
parent 6c11ec706a
commit 77f37f33b8
1 changed files with 35 additions and 32 deletions
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code-rs/tui/src/chatwidget.rs
+35 -32
View File
@@ -4790,6 +4790,7 @@ impl ChatWidget<'_> {
self.history_render.invalidate_height_cache();
self.mark_render_requests_dirty();
self.history_prefix_append_only.set(false);
self.history_virtualization_sync_pending.set(true);
}
fn mark_render_requests_dirty(&self) {
@@ -5151,41 +5152,45 @@ impl ChatWidget<'_> {
self.history_live_window = None;
return false;
}
let history_len = self.history_cells.len();
let new_range = if scroll_pos >= total_height {
// Tail-only content fills the viewport; keep all history frozen.
(history_len, history_len)
} else {
let live_margin = viewport_rows / 2;
let live_start = scroll_pos.saturating_sub(live_margin);
let live_end = scroll_pos
.saturating_add(viewport_rows)
.saturating_add(live_margin)
.min(total_height);
let live_margin = viewport_rows / 2;
let live_start = scroll_pos.saturating_sub(live_margin);
let live_end = scroll_pos
.saturating_add(viewport_rows)
.saturating_add(live_margin)
.min(total_height);
let (mut start_idx, mut end_idx) = {
let ps_ref = self.history_render.prefix_sums.borrow();
let ps: &Vec<u16> = &ps_ref;
if ps.len() <= 1 {
return false;
}
let (mut start_idx, mut end_idx) = {
let ps_ref = self.history_render.prefix_sums.borrow();
let ps: &Vec<u16> = &ps_ref;
if ps.len() <= 1 {
return false;
let start_idx = match ps.binary_search(&live_start) {
Ok(i) => i,
Err(i) => i.saturating_sub(1),
};
let end_idx = match ps.binary_search(&live_end) {
Ok(i) => i,
Err(i) => i,
};
(start_idx, end_idx)
};
start_idx = start_idx.min(history_len);
end_idx = end_idx.min(history_len);
if start_idx > end_idx {
start_idx = end_idx;
}
let start_idx = match ps.binary_search(&live_start) {
Ok(i) => i,
Err(i) => i.saturating_sub(1),
};
let end_idx = match ps.binary_search(&live_end) {
Ok(i) => i,
Err(i) => i,
};
(start_idx, end_idx)
};
let history_len = self.history_cells.len();
start_idx = start_idx.min(history_len);
end_idx = end_idx.min(history_len);
if start_idx > end_idx {
start_idx = end_idx;
}
let new_range = (start_idx, end_idx);
if self.history_live_window == Some(new_range) {
return false;
}
@@ -5248,10 +5253,8 @@ impl ChatWidget<'_> {
}
ps_ref[history_len]
};
let history_scroll_pos = scroll_pos.min(history_total.saturating_sub(1));
self.update_history_live_window(
history_scroll_pos,
scroll_pos,
viewport_rows,
history_total,
render_settings,