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use std::io;
use std::ops::Rem;
use std::iter::repeat;
use console::{Key, Term};
pub struct Select {
default: usize,
items: Vec<String>,
clear: bool,
}
pub struct Checkboxes {
items: Vec<String>,
clear: bool,
}
impl Select {
pub fn new() -> Select {
Select {
default: !0,
items: vec![],
clear: true,
}
}
pub fn clear(&mut self, val: bool) -> &mut Select {
self.clear = val;
self
}
pub fn default(&mut self, val: usize) -> &mut Select {
self.default = val;
self
}
pub fn item(&mut self, item: &str) -> &mut Select {
self.items.push(item.to_string());
self
}
pub fn items(&mut self, items: &[&str]) -> &mut Select {
for item in items {
self.items.push(item.to_string());
}
self
}
pub fn interact(&self) -> io::Result<usize> {
self.interact_on(&Term::stderr())
}
pub fn interact_on(&self, term: &Term) -> io::Result<usize> {
let mut sel = self.default;
loop {
for (idx, item) in self.items.iter().enumerate() {
term.write_line(&format!(
"{} {}",
if sel == idx {
">"
} else {
" "
},
item,
))?;
}
match term.read_key()? {
Key::ArrowDown | Key::Char('j') => {
if sel == !0 {
sel = 0;
} else {
sel = (sel as u64 + 1).rem(self.items.len() as u64) as usize;
}
}
Key::ArrowUp | Key::Char('k') => {
if sel == !0 {
sel = self.items.len() - 1;
} else {
sel = ((sel as i64 - 1 + self.items.len() as i64) %
(self.items.len() as i64)) as usize;
}
}
Key::Enter | Key::Char(' ' ) if sel != !0 => {
if self.clear {
term.clear_last_lines(self.items.len())?;
}
return Ok(sel);
}
_ => {}
}
term.clear_last_lines(self.items.len())?;
}
}
}
impl Checkboxes {
pub fn new() -> Checkboxes {
Checkboxes {
items: vec![],
clear: true,
}
}
pub fn clear(&mut self, val: bool) -> &mut Checkboxes {
self.clear = val;
self
}
pub fn item(&mut self, item: &str) -> &mut Checkboxes {
self.items.push(item.to_string());
self
}
pub fn items(&mut self, items: &[&str]) -> &mut Checkboxes {
for item in items {
self.items.push(item.to_string());
}
self
}
pub fn interact(&self) -> io::Result<Vec<usize>> {
self.interact_on(&Term::stderr())
}
pub fn interact_on(&self, term: &Term) -> io::Result<Vec<usize>> {
let mut sel = 0;
let mut selected: Vec<_> = repeat(false).take(self.items.len()).collect();
loop {
for (idx, item) in self.items.iter().enumerate() {
term.write_line(&format!(
"{} [{}] {}",
if sel == idx {
">"
} else {
" "
},
if selected[idx] {
"x"
} else {
" "
},
item,
))?;
}
match term.read_key()? {
Key::ArrowDown | Key::Char('j') => {
if sel == !0 {
sel = 0;
} else {
sel = (sel as u64 + 1).rem(self.items.len() as u64) as usize;
}
}
Key::ArrowUp | Key::Char('k') => {
if sel == !0 {
sel = self.items.len() - 1;
} else {
sel = ((sel as i64 - 1 + self.items.len() as i64) %
(self.items.len() as i64)) as usize;
}
}
Key::Char(' ' ) => {
selected[sel] = !selected[sel];
}
Key::Escape => {
if self.clear {
term.clear_last_lines(self.items.len())?;
}
return Ok(vec![]);
},
Key::Enter => {
if self.clear {
term.clear_last_lines(self.items.len())?;
}
return Ok(selected.into_iter().enumerate().filter_map(|(idx, selected)| {
if selected {
Some(idx)
} else {
None
}
}).collect());
}
_ => {}
}
term.clear_last_lines(self.items.len())?;
}
}
}