1  // Copyright (c) 2025 ADnet Contributors
 2  // This file is part of the AlphaOS library.
 3  
 4  // Licensed under the Apache License, Version 2.0 (the "License");
 5  // you may not use this file except in compliance with the License.
 6  // You may obtain a copy of the License at:
 7  
 8  // http://www.apache.org/licenses/LICENSE-2.0
 9  
10  // Unless required by applicable law or agreed to in writing, software
11  // distributed under the License is distributed on an "AS IS" BASIS,
12  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  // See the License for the specific language governing permissions and
14  // limitations under the License.
15  
16  pub(super) struct Tabs {
17      pub titles: Vec<&'static str>,
18      pub index: usize,
19  }
20  
21  impl Tabs {
22      pub fn new(titles: Vec<&'static str>) -> Self {
23          Self { titles, index: 0 }
24      }
25  
26      pub fn next(&mut self) {
27          self.index = (self.index + 1) % self.titles.len();
28      }
29  
30      pub fn previous(&mut self) {
31          if self.index > 0 {
32              self.index -= 1;
33          } else {
34              self.index = self.titles.len() - 1;
35          }
36      }
37  }