Added select_all method to TextInput.

examples/todos/src/main.rs

@@ -265,8 +265,10 @@ impl Task {
                 self.completed = completed;
             }
             TaskMessage::Edit => {
+                let mut text_input = text_input::State::focused();
+                text_input.select_all();
                 self.state = TaskState::Editing {
-                    text_input: text_input::State::focused(),
+                    text_input,
                     delete_button: button::State::new(),
                 };
             }

native/src/widget/text_input.rs

@@ -792,6 +792,11 @@ impl State {
     pub fn move_cursor_to(&mut self, position: usize) {
         self.cursor.move_to(position);
     }
+
+    /// Selects all the content of the [`TextInput`].
+    pub fn select_all(&mut self) {
+        self.cursor.select_range(0, usize::MAX);
+    }
 }
 
 // TODO: Reduce allocations