Don’t use Option as selected index

src/main.rs

@@ -76,7 +76,7 @@ fn refresh(terminal: &mut tui::Terminal<impl Backend>, tracc: &Tracc) -> Result<
         SelectableList::default()
             .block(block)
             .items(&tracc.printable_todos())
-            .select(tracc.selected)
+            .select(Some(tracc.selected))
             .highlight_style(Style::default().fg(Color::LightGreen))
             .highlight_symbol(">")
             .render(&mut frame, size);

src/tracc.rs

@@ -9,7 +9,7 @@ use tui::Terminal;
 pub struct Tracc {
     // We use owned strings here because they’re easier to manipulate when editing.
     pub todos: Vec<Todo>,
-    pub selected: Option<usize>,
+    pub selected: usize,
     pub mode: Mode,
 }
 
@@ -41,7 +41,7 @@ impl Tracc {
     pub fn open_or_create() -> Self {
         Self {
             todos: read_todos().unwrap_or(vec![Todo::new("This is a list entry")]),
-            selected: Some(0),
+            selected: 0,
             mode: Mode::Normal,
         }
     }
@@ -54,22 +54,20 @@ impl Tracc {
     }
 
     pub fn selection_down(&mut self) {
-        self.selected = self.selected.map(|i| (i + 1).min(self.todos.len() - 1));
+        self.selected = (self.selected + 1).min(self.todos.len().saturating_sub(1));
     }
 
     pub fn selection_up(&mut self) {
-        self.selected = self.selected.map(|i| i.saturating_sub(1));
+        self.selected = self.selected.saturating_sub(1);
     }
 
     pub fn insert(&mut self, todo: Todo) {
-        if let Some(position) = self.selected {
-            if position == self.todos.len().saturating_sub(1) {
-                self.todos.push(todo);
-                self.selected = Some(self.todos.len() - 1);
-            } else {
-                self.todos.insert(position + 1, todo);
-                self.selected = Some(position + 1);
-            }
+        if self.selected == self.todos.len().saturating_sub(1) {
+            self.todos.push(todo);
+            self.selected = self.todos.len() - 1;
+        } else {
+            self.todos.insert(self.selected + 1, todo);
+            self.selected += 1;
         }
         self.mode = Mode::Normal;
     }
@@ -78,19 +76,17 @@ impl Tracc {
         if self.todos.is_empty() {
             return None;
         }
-        if let Some(n) = self.selected {
-            self.selected = Some(n.min(self.todos.len() - 1));
-            return Some(self.todos.remove(n));
-        }
-        None
+        let index = self.selected;
+        self.selected = index.min(self.todos.len() - 1);
+        return Some(self.todos.remove(index));
     }
 
     pub fn toggle_current(&mut self) {
-        self.current().done = !self.current().done;
+        self.todos[self.selected].done = !self.todos[self.selected].done;
     }
 
-    fn current(&mut self) -> &mut Todo {
-        &mut self.todos[self.selected.unwrap()]
+    fn current(&self) -> &Todo {
+        &self.todos[self.selected]
     }
 
     pub fn set_mode(
@@ -103,7 +99,7 @@ impl Tracc {
             Mode::Normal => {
                 if self.current().text.is_empty() {
                     self.remove_current();
-                    self.selected.as_mut().map(|n| *n = n.saturating_sub(1));
+                    self.selected = self.selected.saturating_sub(1);
                 }
                 term.hide_cursor()?
             }
@@ -113,11 +109,11 @@ impl Tracc {
     }
 
     pub fn append_to_current(&mut self, chr: char) {
-        self.todos[self.selected.unwrap()].text.push(chr);
+        self.todos[self.selected].text.push(chr);
     }
 
     pub fn current_pop(&mut self) {
-        self.todos[self.selected.unwrap()].text.pop();
+        self.todos[self.selected].text.pop();
     }
 
     pub fn persist(self) {