rs-kilo/src/main.rs

mod editor;
mod helpers;

use crate::editor::Editor;
use crate::helpers::*;
use libc::STDIN_FILENO;
use std::env;
use std::io::Error;
use std::result::Result;

fn main() -> Result<(), Error> {
    let args: Vec<String> = env::args().collect();

    // Save original terminal flags
    let original_termios = get_termios(STDIN_FILENO);

    // Disable canonical/"cooked" terminal mode
    enable_raw_mode();

    // Initialize the editor
    let mut editor = Editor::new();

    // Open the file if specified, from the command line
    if args.len() >= 2 {
        editor.open(&args[1])?;
    }

    // Main input loop. Editor::process_keypress uses an Option Enum as a sentinel.
    // `None` is returned on a quit action, in other cases, `Some(())` is returned,
    // continuing the loop
    loop {
        editor.refresh_screen()?;

        if editor.process_keypress().is_none() {
            break;
        }
    }

    // Restore previous terminal flags before exit
    disable_raw_mode(&original_termios);

    Ok(())
}