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fix: do not move offset on unselect

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This commit is contained in:
EdJoPaTo
2024-02-26 18:05:17 +01:00
parent d3386fe016
commit 15f05be46c
2 changed files with 21 additions and 16 deletions
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src/lib.rs
+18 -16
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@@ -201,20 +201,20 @@ where
}
let available_height = area.height as usize;
let selected_index = if state.selected.is_empty() {
0
} else {
visible
.iter()
.position(|flattened| flattened.identifier == state.selected)
.unwrap_or(0)
};
let ensure_index_in_view =
if state.ensure_selected_in_view_on_next_render && !state.selected.is_empty() {
visible
.iter()
.position(|flattened| flattened.identifier == state.selected)
} else {
None
};
// Ensure last line is still visible
let mut start = state.offset.min(visible.len().saturating_sub(1));
if state.ensure_selected_in_view_on_next_render {
start = start.min(selected_index);
if let Some(ensure_index_in_view) = ensure_index_in_view {
start = start.min(ensure_index_in_view);
}
let mut end = start;
@@ -231,12 +231,14 @@ where
end += 1;
}
while state.ensure_selected_in_view_on_next_render && selected_index >= end {
height += visible[end].item.height();
end += 1;
while height > available_height {
height = height.saturating_sub(visible[start].item.height());
start += 1;
if let Some(ensure_index_in_view) = ensure_index_in_view {
while ensure_index_in_view >= end {
height += visible[end].item.height();
end += 1;
while height > available_height {
height = height.saturating_sub(visible[start].item.height());
start += 1;
}
}
}