#![allow(clippy::implicit_hasher)]
use crate::identifier::{TreeIdentifier, TreeIdentifierVec};
use crate::TreeItem;
pub struct Flattened<'a> {
pub identifier: Vec<usize>,
pub item: &'a TreeItem<'a>,
}
impl<'a> Flattened<'a> {
pub fn depth(&self) -> usize {
self.identifier.len() - 1
}
}
pub fn flatten<'a>(opened: &[TreeIdentifierVec], items: &'a [TreeItem<'a>]) -> Vec<Flattened<'a>> {
internal(opened, items, &[])
}
fn internal<'a>(
opened: &[TreeIdentifierVec],
items: &'a [TreeItem<'a>],
current: TreeIdentifier,
) -> Vec<Flattened<'a>> {
let mut result = Vec::new();
for (index, item) in items.iter().enumerate() {
let mut child_identifier = current.to_vec();
child_identifier.push(index);
result.push(Flattened {
item,
identifier: child_identifier.clone(),
});
if opened.contains(&child_identifier) {
let mut child_result = internal(opened, &item.children, &child_identifier);
result.append(&mut child_result);
}
}
result
}
#[cfg(test)]
fn get_naive_string_from_text(text: &tui::text::Text<'_>) -> String {
text.lines
.first()
.unwrap()
.0
.first()
.unwrap()
.content
.to_string()
}
#[cfg(test)]
fn get_example_tree_items() -> Vec<TreeItem<'static>> {
vec![
TreeItem::new_leaf("a"),
TreeItem::new(
"b",
vec![
TreeItem::new_leaf("c"),
TreeItem::new("d", vec![TreeItem::new_leaf("e"), TreeItem::new_leaf("f")]),
TreeItem::new_leaf("g"),
],
),
TreeItem::new_leaf("h"),
]
}
#[test]
fn get_opened_nothing_opened_is_top_level() {
let items = get_example_tree_items();
let result = flatten(&[], &items);
let result_text = result
.iter()
.map(|o| get_naive_string_from_text(&o.item.text))
.collect::<Vec<_>>();
assert_eq!(result_text, ["a", "b", "h"]);
}
#[test]
fn get_opened_wrong_opened_is_only_top_level() {
let items = get_example_tree_items();
let opened = [vec![0], vec![1, 1]];
let result = flatten(&opened, &items);
let result_text = result
.iter()
.map(|o| get_naive_string_from_text(&o.item.text))
.collect::<Vec<_>>();
assert_eq!(result_text, ["a", "b", "h"]);
}
#[test]
fn get_opened_one_is_opened() {
let items = get_example_tree_items();
let opened = [vec![1]];
let result = flatten(&opened, &items);
let result_text = result
.iter()
.map(|o| get_naive_string_from_text(&o.item.text))
.collect::<Vec<_>>();
assert_eq!(result_text, ["a", "b", "c", "d", "g", "h"]);
}
#[test]
fn get_opened_all_opened() {
let items = get_example_tree_items();
let opened = [vec![1], vec![1, 1]];
let result = flatten(&opened, &items);
let result_text = result
.iter()
.map(|o| get_naive_string_from_text(&o.item.text))
.collect::<Vec<_>>();
assert_eq!(result_text, ["a", "b", "c", "d", "e", "f", "g", "h"]);
}