src/list.rs


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#[derive(Debug)]
pub struct ContentList<T> {
    pub list: Vec<T>,
    pub index: usize,
}

impl<T> ContentList<T> {
    pub fn new() -> Self {
        ContentList {
            list: Vec::new(),
            index: 0,
        }
    }

    // Go to next item in list
    pub fn next(&mut self) {
        // if self.index < self.list.len() - 1 {
        //     self.index += 1;
        // }

        if self.index == self.list.len() - 1 {
            self.index = 0;
        } else {
            self.index += 1;
        }
    }

    /// Go to previous item in list
    pub fn prev(&mut self) {
        if self.index == 0 {
            self.index = self.list.len() - 1;
        } else  {
            self.index -= 1;
        }
    }
}