delta-gitu 0.1.5

An experimental fork of gitu (a git client inspired by Magit), published as a library for delta to embed
Documentation 
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use super::Screen;
use crate::items::RenderParams;
use crate::{Res, config::Config, items, items::RenderedRow, menu::Menu, rebase_todo::RebaseTodo};
use git2::Repository;
use std::{cell::RefCell, collections::HashMap, rc::Rc, sync::Arc};

type CommitRows = HashMap<String, Vec<Rc<RenderedRow>>>;

pub(crate) fn create(
    config: Arc<Config>,
    repo: Rc<Repository>,
    params: RenderParams,
    todo: Rc<RefCell<RebaseTodo>>,
) -> Res<Screen> {
    // The commits themselves don't change while the list is edited, so their
    // rendered rows are fetched once per width rather than on every reorder.
    let cache: RefCell<Option<(u16, CommitRows)>> = RefCell::new(None);
    let revs = todo.borrow().revs();
    let screen_config = Arc::clone(&config);

    let mut screen = Screen::new(
        config,
        params,
        Box::new(move |params: RenderParams| {
            let mut cache = cache.borrow_mut();
            if cache
                .as_ref()
                .is_none_or(|(width, _)| *width != params.size.0)
            {
                let rows = items::rendered_commit_rows(&screen_config, &repo, &params, &revs);
                *cache = Some((params.size.0, rows));
            }

            let (_, rows) = cache.as_ref().expect("just populated");
            Ok(items::rebase_todo_items(&screen_config, &repo, &todo, rows))
        }),
    )?;

    screen.menu = Some(Menu::RebaseTodo);
    Ok(screen)
}