difference 1.0.0

extern crate term;
extern crate difference;
use std::io::Write;
use difference::{Difference, Changeset};

// Screenshot: https://raw.githubusercontent.com/johannhof/difference.rs/master/assets/github-style.png

#[allow(unused_must_use)]
fn main() {
  let text1 = "Roses are red, violets are blue,\n\
               I wrote this library here,\n\
               just for you.\n\
               (It's true).";

  let text2 = "Roses are red, violets are blue,\n\
               I wrote this documentation here,\n\
               just for you.\n\
               (It's quite true).";

  let Changeset{diffs, ..} = Changeset::new(text1, text2, "\n");

  let mut t = term::stdout().unwrap();

  for i in 0..diffs.len() {
      match diffs[i] {
          Difference::Same(ref x) => {
              t.reset().unwrap();
              writeln!(t, " {}", x);
          },
          Difference::Add(ref x) => {
              match diffs[i - 1] {
                Difference::Rem(ref y) => {
                  t.fg(term::color::GREEN).unwrap();
                  write!(t, "+");
                  let Changeset{diffs, ..} = Changeset::new(y, x, " ");
                  for c in diffs {
                    match c {
                      Difference::Same(ref z) => {
                        t.fg(term::color::GREEN).unwrap();
                        write!(t, "{}", z);
                        write!(t, " ");
                      },
                      Difference::Add(ref z) => {
                        t.fg(term::color::WHITE).unwrap();
                        t.bg(term::color::GREEN).unwrap();
                        write!(t, "{}", z);
                        t.reset().unwrap();
                        write!(t, " ");
                      },
                      _ => ()
                    }
                  }
                  writeln!(t, "");
                },
                _ => {
                  t.fg(term::color::BRIGHT_GREEN).unwrap();
                  writeln!(t, "+{}", x);
                }
              };
          },
          Difference::Rem(ref x) => {
              t.fg(term::color::RED).unwrap();
              writeln!(t, "-{}", x);
          }
      }
  }
  t.reset().unwrap();
  t.flush().unwrap();
}