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use std::sync::mpsc::channel;
use termion::event::{Event, Key, MouseEvent};
use termion::input::TermRead;
use crate::coordinates::{Coordinates, Position, Size};
use crate::fail::{HResult, HError};
use crate::window::{send_event, Events};
use std::io::{BufWriter, Write, stdin};
pub trait Widget {
fn get_widget(&self) -> Box<dyn Widget> {
Box::new(crate::textview::TextView::new_blank())
}
fn get_coordinates(&self) -> &Coordinates;
fn set_coordinates(&mut self, coordinates: &Coordinates);
fn render_header(&self) -> String;
fn render_footer(&self) -> String { "".into() }
fn refresh(&mut self);
fn get_drawlist(&self) -> String;
fn on_event(&mut self, event: Event) -> HResult<()> {
match event {
Event::Key(Key::Char('q')) => panic!("It's your fault!"),
Event::Key(key) => self.on_key(key),
Event::Mouse(button) => self.on_mouse(button),
Event::Unsupported(wtf) => self.on_wtf(wtf),
}
}
fn on_key(&mut self, key: Key) -> HResult<()> {
match key {
_ => self.bad(Event::Key(key)),
}
Ok(())
}
fn on_mouse(&mut self, event: MouseEvent) -> HResult<()> {
match event {
_ => self.bad(Event::Mouse(event)),
}
Ok(())
}
fn on_wtf(&mut self, event: Vec<u8>) -> HResult<()> {
match event {
_ => self.bad(Event::Unsupported(event)),
}
Ok(())
}
fn show_status(&self, status: &str) {
crate::window::show_status(status);
}
fn minibuffer(&self, query: &str) -> HResult<String> {
crate::window::minibuffer(query)
}
fn bad(&mut self, event: Event) {
self.show_status(&format!("Stop the nasty stuff!! {:?} does nothing!", event));
}
fn get_header_drawlist(&mut self) -> String {
format!(
"{}{}{:xsize$}{}{}",
crate::term::goto_xy(1, 1),
crate::term::header_color(),
" ",
crate::term::goto_xy(1, 1),
self.render_header(),
xsize = self.get_coordinates().xsize() as usize
)
}
fn get_footer_drawlist(&mut self) -> String {
let xsize = self.get_coordinates().xsize();
let ypos = crate::term::ysize();
format!(
"{}{}{:xsize$}{}{}",
crate::term::goto_xy(1, ypos),
crate::term::header_color(),
" ",
crate::term::goto_xy(1, ypos),
self.render_footer(),
xsize = xsize as usize)
}
fn get_clearlist(&self) -> String {
let (xpos, ypos) = self.get_coordinates().u16position();
let (xsize, ysize) = self.get_coordinates().u16size();
(ypos..ysize + 2)
.map(|line| {
format!(
"{}{}{:xsize$}",
crate::term::reset(),
crate::term::goto_xy(xpos, line),
" ",
xsize = xsize as usize
)
})
.collect()
}
fn get_redraw_empty_list(&self, lines: usize) -> String {
let (xpos, ypos) = self.get_coordinates().u16position();
let (xsize, ysize) = self.get_coordinates().u16size();
let start_y = lines + ypos as usize;
(start_y..(ysize + 2) as usize)
.map(|i| {
format!(
"{}{:xsize$}",
crate::term::goto_xy(xpos, i as u16),
" ",
xsize = xsize as usize
)
})
.collect()
}
fn draw(&self) -> HResult<()> {
let drawlist = self.get_drawlist();
let mut bufout = BufWriter::new(std::io::stdout());
write!(bufout, "{}", drawlist)?;
bufout.flush()?;
Ok(())
}
fn popup(&mut self) -> HResult<()> {
self.run_widget();
send_event(Events::ExclusiveEvent(None));
Ok(())
}
fn run_widget(&mut self) -> HResult<()> {
let (tx_event, rx_event) = channel();
send_event(Events::ExclusiveEvent(Some(tx_event)))?;
dbg!("sent exclusive request");
self.clear()?;
self.refresh();
self.draw()?;
dbg!("entering loop");
for event in rx_event.iter() {
dbg!(&event);
match event {
Events::InputEvent(input) => {
if let Err(HError::PopupFinnished) = self.on_event(input) {
return Err(HError::PopupFinnished)
}
}
Events::WidgetReady => {
self.refresh();
}
_ => {}
}
self.draw()?;
}
Ok(())
}
fn clear(&self) -> HResult<()> {
let clearlist = self.get_clearlist();
write!(std::io::stdout(), "{}", clearlist)?;
std::io::stdout().flush()?;
Ok(())
}
fn animate_slide_up(&mut self) {
let coords = self.get_coordinates().clone();
let xpos = coords.position().x();
let ypos = coords.position().y();
let xsize = coords.xsize();
let ysize = coords.ysize();
let clear = self.get_clearlist();
let pause = std::time::Duration::from_millis(5);
let mut bufout = BufWriter::new(std::io::stdout());
for i in (0..10).rev() {
let coords = Coordinates { size: Size((xsize,ysize-i)),
position: Position
((xpos,
ypos+i))
};
self.set_coordinates(&coords);
let buffer = self.get_drawlist();
write!(bufout, "{}{}",
clear, buffer).unwrap();
bufout.flush().ok();
std::thread::sleep(pause);
}
}
}
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