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fix(console): avoid crash when accessing selected item #570

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merged 2 commits into from
Jul 24, 2024
Merged

fix(console): avoid crash when accessing selected item #570

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ca3b160
fix: avoid crash when accessing selected item
Rustin170506 Jul 8, 2024
e746bb0
refactor: return Rc directly
Rustin170506 Jul 15, 2024
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6 changes: 3 additions & 3 deletions tokio-console/src/view/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ impl View {
// mutate the currently selected view.
match event {
key!(Enter) => {
if let Some(task) = self.tasks_list.selected_item().upgrade() {
if let Some(task) = self.tasks_list.selected_item() {
update_kind = UpdateKind::SelectTask(task.borrow().span_id());
self.state = TaskInstance(self::task::TaskView::new(
task,
Expand All @@ -149,7 +149,7 @@ impl View {
ResourcesList => {
match event {
key!(Enter) => {
if let Some(res) = self.resources_list.selected_item().upgrade() {
if let Some(res) = self.resources_list.selected_item() {
update_kind = UpdateKind::SelectResource(res.borrow().span_id());
self.state = ResourceInstance(self::resource::ResourceView::new(res));
}
Expand All @@ -169,7 +169,7 @@ impl View {
update_kind = UpdateKind::Other;
}
key!(Enter) => {
if let Some(op) = view.async_ops_table.selected_item().upgrade() {
if let Some(op) = view.async_ops_table.selected_item() {
if let Some(task_id) = op.borrow().task_id() {
let task = self
.tasks_list
Expand Down
22 changes: 13 additions & 9 deletions tokio-console/src/view/table.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ use ratatui::{
use std::convert::TryFrom;

use std::cell::RefCell;
use std::rc::Weak;
use std::rc::{Rc, Weak};

pub(crate) trait TableList<const N: usize> {
type Row;
Expand Down Expand Up @@ -154,18 +154,22 @@ impl<T: TableList<N>, const N: usize> TableListState<T, N> {
self.scroll_with(|_, _| 0)
}

pub(in crate::view) fn selected_item(&self) -> Weak<RefCell<T::Row>> {
pub(in crate::view) fn selected_item(&self) -> Option<Rc<RefCell<T::Row>>> {
self.table_state
.selected()
.map(|i| {
let selected = if self.sort_descending {
i
.and_then(|i| {
if self.sort_descending {
if i < self.sorted_items.len() {
Some(self.sorted_items[i].clone())
} else {
None
}
} else {
self.sorted_items.len() - i - 1
};
self.sorted_items[selected].clone()
let adjusted_index = self.sorted_items.len().checked_sub(i + 1)?;
self.sorted_items.get(adjusted_index).cloned()
}
})
.unwrap_or_default()
.and_then(|weak| weak.upgrade())
}

pub(in crate::view) fn render(
Expand Down
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