Properly take in input and control characters

src/editor.rs

@@ -5,32 +5,44 @@ use nix::sys::termios::Termios;
 use nix::unistd::read;
 
 use std::io;
-use std::io::{BufReader, Error, Stdin};
 use std::io::prelude::*;
+use std::io::{BufReader, Error, Stdin};
+use std::str::Chars;
 
 use term_parser::{Action, ActionIter};
 
 /// Main structure for the editor
 pub struct Editor {
-    /// Reference to terminal settings before setting up raw mode
-    original_termios: Termios,
+
 }
 
+// init
 impl Editor {
     pub fn new() -> Self {
         Editor {
-            original_termios: get_termios(STDIN_FILENO)
         }
     }
+}
 
-    fn read_key(&mut self) -> char {
+// Terminal
+impl Editor {
+    fn read_key(&mut self) -> Option<Vec<char>> {
         let stdin = io::stdin();
         let mut in_str = String::new();
         let mut input = BufReader::new(stdin.take(1));
         input.read_to_string(&mut in_str).unwrap();
 
-        let mut chars = in_str.chars();
-        chars.next().unwrap()
+        let mut output: Vec<char> = vec![];
+
+        for char in in_str.chars() {
+            output.push(char);
+        }
+
+        if output.len() == 0 {
+            return None
+        }
+
+        return Some(output)
     }
 
     fn read_term_code(&mut self) -> ActionIter<BufReader<Stdin>> {
@@ -38,10 +50,7 @@ impl Editor {
         let buffer = BufReader::new(stdin);
         let term_code_iter = ActionIter::new(buffer);
 
-        term_code_iter
-    }
-
-    pub fn process_keypress(&mut self) -> Option<()> {
+        /*
         for term_code in self.read_term_code() {
             let term_code = match term_code {
                 Ok(code) => code,
@@ -49,23 +58,49 @@ impl Editor {
             };
             print!("{:?}\r\n", term_code);
         }
+        */
 
-        /* let char = self.read_key();
+        term_code_iter
+    }
+}
 
-        if char == 'q' {
-            disable_raw_mode(&self.original_termios)?;
+// Input
+impl Editor {
+    pub fn process_keypress(&mut self) -> Option<()> {
+        let chars= self.read_key();
 
-            // Break out of the input loop
-            return None;
+        // No input, just continue
+        if chars.is_none() {
+            return Some(())
         }
+        let chars = chars.unwrap();
+
+        if chars.len() == 1 {
+            let char = chars[0];
+
+            if char == CTRL_KEY('q') {
+                // Break out of the input loop
+                return None;
+            }
+
+            // Echo characters
+            if char.is_ascii_control() {
+                print!("{}\r\n", char as u8);
+            } else {
+                print!("{} ('{}')\r\n", char as u8, char);
+            }
 
-        // Echo characters
-        if is_cntrl(char) {
-            print!("{}\r\n", char as u8);
         } else {
-            print!("{} ('{}')\r\n", char as u8, char);
-        } */
+            print!("{:?}\r\n", chars);
+            // Handle escape sequences
+        }
 
         Some(())
     }
 }
+
+const fn CTRL_KEY(c: char) -> char {
+    let key = c as u8;
+
+    (key & 0x1f) as char
+}

src/main.rs

@@ -2,9 +2,11 @@ mod editor;
 mod helpers;
 
 use crate::editor::Editor;
-use crate::helpers::{STDIN_FILENO, enable_raw_mode};
+use crate::helpers::*;
 
 fn main() {
+    let original_termios = get_termios(STDIN_FILENO);
+
     enable_raw_mode().unwrap();
 
     let mut editor = Editor::new();
@@ -12,4 +14,6 @@ fn main() {
     while editor.process_keypress().is_some() {
         // loop
     }
+
+    disable_raw_mode(&original_termios).unwrap();
 }