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use std::path::PathBuf;
use anyhow::Result;
use std::fmt;
use std::ffi::OsStr;
#[derive(Debug)]
pub struct TreeEntry {
name: String,
dir: Option<PathBuf>,
}
impl fmt::Display for TreeEntry {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.name)
}
}
pub fn sidebar<I>(iter: I) -> Result<cursive_tree_view::TreeView<TreeEntry>>
where I: Iterator<Item = PathBuf>
{
let mut tv = cursive_tree_view::TreeView::default();
iter.map(|path| {
path.file_name()
.and_then(OsStr::to_str)
.map(String::from)
.ok_or_else(|| anyhow!("UTF8 error"))
.map(|name| {
TreeEntry {
name,
dir: Some(path)
}
})
})
.enumerate()
.fold(Ok(tv), |accu, (i, item)| {
accu.and_then(|mut tv| {
item.map(|itm| tv.insert_item(itm, cursive_tree_view::Placement::After, i))
.map(|_| tv)
})
})
}
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