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use std::path::PathBuf;
#[derive(Default, Clone)]
pub struct History {
pub visited: Vec<PathBuf>,
pub index: usize,
}
impl History {
pub fn push(&mut self, path: &PathBuf) {
if !self.visited.contains(path) {
self.visited.push(path.to_owned());
self.index = self.len() - 1
}
}
pub fn is_empty(&self) -> bool {
self.visited.is_empty()
}
pub fn len(&self) -> usize {
self.visited.len()
}
pub fn next(&mut self) {
if self.is_empty() {
self.index = 0
} else if self.index > 0 {
self.index -= 1;
} else {
self.index = self.len() - 1
}
}
pub fn prev(&mut self) {
if self.is_empty() {
self.index = 0;
} else {
self.index = (self.index + 1) % self.len()
}
}
pub fn selected(&self) -> Option<PathBuf> {
if self.index < self.len() {
Some(self.visited[self.index].clone())
} else {
None
}
}
pub fn drop_queue(&mut self) {
if self.is_empty() {
return;
}
let final_length = self.len() - self.index;
self.visited.truncate(final_length);
if self.is_empty() {
self.index = 0
} else {
self.index = self.len() - 1
}
}
}
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