Fleche haut marche un peu, à finir

Cargo.toml

@@ -12,3 +12,4 @@ dirs = "4.0.0"
 users = "0.11.0"
 gethostname = "0.4.1"
 termion = "2.0.1"
+unicode-segmentation = "1.6.0"

src/lib.rs

@@ -13,6 +13,7 @@ pub mod shell {
     use termion::input::TermRead;
     use termion::raw::IntoRawMode;
     use termion::color;
+    use unicode_segmentation::UnicodeSegmentation;
 
     mod history;
     use crate::shell::history::*;
@@ -178,6 +179,20 @@ pub mod shell {
         }
     }
 
+    fn rewrite(current_cmd: String) -> String {
+        //Deletes currently written command
+        
+        let mut stdout = stdout().into_raw_mode().unwrap();
+        let nbr_of_chars = current_cmd.graphemes(true).count();
+        while nbr_of_chars > 0 {
+            write!(stdout, "\x1b[D").unwrap();
+            write!(stdout, "\x1b[K").unwrap();
+        }
+        return String::new();
+    }
+
+
+
     pub fn run_raw() {
         let stdin = stdin();
         let mut stdout = stdout().into_raw_mode().unwrap();
@@ -243,6 +258,7 @@ pub mod shell {
                 },
 
                 Key::Up => {
+                    mycommand = rewrite(mycommand);
                     let lastnumber = match get_history_number() {
                         Ok(e) => e,
                         Err(_) => continue,
@@ -251,8 +267,9 @@ pub mod shell {
                         Some(c) => c,
                         None => continue
                     };
-                    let prompt = build_prompt();
+                    mycommand = lastcmd.trim().to_string();
-                    write!(stdout, "\r\n{}{}", prompt, lastcmd.trim());
+                    //let prompt = build_prompt();
+                    write!(stdout, "{}", mycommand);
                     mycommand = lastcmd;
                 },