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