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|
mod rope;
mod term;
use rope::Rope;
use std::ffi::{OsStr, OsString};
use std::io::Write;
use std::path::Path;
use term::Key;
fn edit(file: &OsStr) -> Result<(), String> {
let _raw_handle = match term::raw() {
Some(h) => h,
None => {
return Err(String::from("cannot put terminal in raw mode"));
}
};
let r = match Rope::open(Path::new(file)) {
Ok(r) => r,
Err(err) => {
return Err(format!("open file {}: {}", file.to_string_lossy(), err));
}
};
let size = match term::size() {
Some(size) => size,
None => {
return Err(String::from("cannot get terminal size"));
}
};
let mut stdout = std::io::stdout();
for i in 0..usize::from(size.ws_row) {
if i > 0 {
let _ = stdout.write(b"\r\n");
}
let _ = r.print_line(&mut stdout, i);
}
let _ = stdout.flush();
let mut stdin = std::io::stdin();
loop {
let c = match term::read_key(&mut stdin) {
Ok(c) => c,
Err(err) => {
return Err(err);
}
};
match c {
Key::CtrlQ => {
break;
}
Key::Up => {
let _ = stdout.write(b"\x1b[A");
let _ = stdout.flush();
}
Key::Down => {
let _ = stdout.write(b"\x1b[B");
let _ = stdout.flush();
}
Key::Left => {
let _ = stdout.write(b"\x1b[D");
let _ = stdout.flush();
}
Key::Right => {
let _ = stdout.write(b"\x1b[C");
let _ = stdout.flush();
}
Key::Char(c) => {
print!("{} ", c);
let _ = stdout.flush();
}
}
}
return Ok(());
}
fn main() {
let args: Vec<OsString> = std::env::args_os().collect();
if args.len() != 2 {
println!("Usage: edit <filename>");
std::process::exit(1);
}
if let Err(err) = edit(&args[1]) {
println!("FAIL: {}", err);
std::process::exit(1);
}
}
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