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use std::{ffi::OsString, fmt, sync::mpsc};
use failure::{self, Error};
use neovim_lib::{
neovim::Neovim,
neovim_api::{Buffer, NeovimApi},
};
use folds::FoldList;
use lines::Lines;
pub enum Event {
LinesEvent {
buf: Buffer,
changedtick: u64,
firstline: i64,
lastline: i64,
linedata: Vec<String>,
more: bool,
},
ChangedTickEvent { buf: Buffer, changedtick: u64 },
DetachEvent { buf: Buffer },
RefreshFolds,
Quit,
}
impl Event {
pub fn event_loop(
receiver: &mpsc::Receiver<Event>,
mut nvim: Neovim,
file: Option<OsString>,
) -> Result<(), Error> {
use self::Event::*;
use card::keyword::Keywords;
let curbuf = nvim.get_current_buf()?;
let mut foldlist = FoldList::new();
let origlines;
let mut lines = Default::default();
let mut keywords: Keywords = Default::default();
let connected = match file {
None => curbuf.attach(&mut nvim, true, vec![])?,
Some(f) => {
origlines = Lines::read_file(f)?;
lines = Lines::from_slice(&origlines);
keywords = Keywords::from_lines(&lines);
foldlist.recreate_all(&keywords, &lines)?;
foldlist.resend_all(&mut nvim)?;
curbuf.attach(&mut nvim, false, vec![])?
}
};
if !connected {
return Err(failure::err_msg("Could not enable buffer updates!"));
}
loop {
match receiver.recv() {
Ok(LinesEvent {
firstline,
lastline,
linedata,
changedtick,
..
}) => {
if changedtick == 0 {
continue;
}
if lastline == -1 {
lines = Lines::from_vec(linedata);
keywords = Keywords::from_lines(&lines);
foldlist.recreate_all(&keywords, &lines)?;
foldlist.resend_all(&mut nvim)?;
} else if lastline >= 0 && firstline >= 0 {
keywords.update(firstline as usize, lastline as usize, &linedata);
lines.update(firstline as usize, lastline as usize, linedata);
foldlist.recreate_all(&keywords, &lines)?;
} else {
error!(
"LinesEvent only works with nonnegative numbers, except for
lastline = -1!"
);
}
}
Ok(RefreshFolds) => {
foldlist.resend_all(&mut nvim)?;
}
Ok(Quit) => {
break;
}
Ok(o) => {
warn!("receiver recieved {:?}", o);
}
Err(e) => {
warn!("receiver received error: {:?}", e);
}
}
}
info!("quitting");
Ok(())
}
}
impl fmt::Debug for Event {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Event::*;
match *self {
LinesEvent {
changedtick,
firstline,
lastline,
ref linedata,
..
} => write!(
f,
"Update{{ changedtick: {}, firstline: {}, \
lastline: {}, #linedata: {} }}",
changedtick,
firstline,
lastline,
linedata.len()
),
ChangedTickEvent { changedtick, .. } => {
write!(f, "ChangedTick{{ changedtick: {} }}", changedtick,)
}
DetachEvent { .. } => write!(f, "UpdatesEnd"),
RefreshFolds => write!(f, "RefreshFolds"),
Quit => write!(f, "Quit"),
}
}
}