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use std::io::{stdin, stdout, Stdout, Write};
use std::sync::{Arc, Mutex};
use termion::event::{Event, Key};
use termion::input::TermRead;
use termion::screen::AlternateScreen;
use crate::term;
use crate::term::ScreenExt;
use crate::coordinates::{Coordinates, Position, Size};
use crate::widget::Widget;
pub struct Window<T>
where
T: Widget,
{
pub selection: usize,
pub widget: T,
pub status: Arc<Mutex<Option<String>>>,
pub screen: AlternateScreen<Box<Stdout>>,
pub coordinates: Coordinates,
}
impl<T> Window<T>
where
T: Widget,
{
pub fn new(widget: T) -> Window<T> {
let mut screen = AlternateScreen::from(Box::new(stdout()));
screen.cursor_hide();
let (xsize, ysize) = termion::terminal_size().unwrap();
let mut win = Window::<T> {
selection: 0,
widget: widget,
status: STATUS_BAR_CONTENT.clone(),
screen: screen,
coordinates: Coordinates {
size: Size((xsize, ysize)),
position: Position((1, 1)),
},
};
win.widget.set_coordinates(&Coordinates {
size: Size((xsize, ysize - 2)),
position: Position((1, 2)),
});
win.widget.refresh();
win
}
pub fn draw(&mut self) {
let output = self.widget.get_drawlist() + &self.widget.get_header_drawlist();
self.screen.write(output.as_ref()).unwrap();
self.screen.flush().unwrap();
Self::draw_status();
}
pub fn show_status(status: &str) {
show_status(status);
}
pub fn draw_status() {
draw_status();
}
pub fn clear_status() {
Self::show_status("");
}
pub fn handle_input(&mut self) {
for event in stdin().events() {
Self::clear_status();
let event = event.unwrap();
self.widget.on_event(event);
self.draw();
}
}
}
impl<T> Drop for Window<T>
where
T: Widget,
{
fn drop(&mut self) {
// When done, restore the defaults to avoid messing with the terminal.
self.screen
.write(
format!(
"{}{}{}{}{}",
termion::screen::ToMainScreen,
termion::clear::All,
termion::style::Reset,
termion::cursor::Show,
termion::cursor::Goto(1, 1)
)
.as_ref(),
)
.unwrap();
}
}
lazy_static! {
static ref STATUS_BAR_CONTENT: Arc<Mutex<Option<String>>> = Arc::new(Mutex::new(None));
}
pub fn draw_status() {
let xsize = term::xsize() as u16;
let status = STATUS_BAR_CONTENT.try_lock().unwrap().clone();
status.or(Some("".to_string())).and_then(|status| {
write!(
stdout(),
"{}{}{:xsize$}{}{}",
term::move_bottom(),
term::status_bg(),
" ",
term::move_bottom(),
status,
xsize = xsize as usize
)
.ok()
});
stdout().flush().unwrap();
}
pub fn show_status(status: &str) {
{
let mut status_content = STATUS_BAR_CONTENT.try_lock().unwrap();
*status_content = Some(status.to_string());
}
draw_status();
}
pub fn minibuffer(query: &str) -> Option<String> {
show_status(&(query.to_string() + ": "));
let mut buffer = "".to_string();
for key in stdin().events() {
match key {
Ok(Event::Key(key)) => match key {
Key::Esc => return None,
Key::Char('\n') => {
if buffer == "" {
return None;
} else {
return Some(buffer);
}
}
Key::Backspace => {
buffer.pop();
}
Key::Char(key) => {
buffer = buffer + &format!("{}", key);
}
_ => {}
},
_ => {}
}
show_status(&(query.to_string() + ": " + &buffer));
}
None
}
|
