Clean directory structure

Cargo.toml

@@ -7,16 +7,8 @@ readme = "README.adoc"
 keywords = ["tui", "cli", "rpn"]
 categories = ["command-line-utilities"]
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
-# Linux only
-# tui = "0.14"
-# termion = "1.5"
-
-# Windows support
 crossterm = "0.18"
 tui = { version = "0.14", default-features = false, features = ['crossterm'] }
-
 serde = {version = "1.0", features = ["derive"]}
 confy = "0.4.0"

src/main.rs

@@ -2,24 +2,23 @@
 #![allow(dead_code)]
 
 mod calc;
+mod event;
 mod format;
-mod util;
-use util::event::{Event, Events};
 
-use calc::constants::{CalculatorDisplayMode, CalculatorState, RegisterState};
-use calc::errors::CalculatorResult;
-use calc::Calculator;
+use calc::{
+    constants::{CalculatorDisplayMode, CalculatorState, RegisterState},
+    errors::CalculatorResult,
+    Calculator,
+};
 use crossterm::{
     event::{DisableMouseCapture, KeyCode, KeyEvent, KeyModifiers},
     execute,
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
 };
-use io::stdout;
-use std::cmp;
-use std::convert::TryFrom;
-use std::io::Write;
+use event::{Event, Events};
+// use io::stdout;
 
-use std::{error::Error, io};
+use std::{cmp, convert::TryFrom, error::Error, io, io::Write};
 use tui::{
     backend::CrosstermBackend,
     layout::{Constraint, Direction, Layout},
@@ -277,7 +276,7 @@ impl App {
 fn main() -> Result<(), Box<dyn Error>> {
     enable_raw_mode()?;
 
-    let mut stdout = stdout();
+    let mut stdout = io::stdout();
     execute!(stdout, EnterAlternateScreen, DisableMouseCapture)?;
     let backend = CrosstermBackend::new(stdout);
     let mut terminal = Terminal::new(backend)?;

src/util/mod.rs

@@ -1 +0,0 @@
-pub mod event;