repline: change error formatting

repline/src/editor.rs

@@ -112,6 +112,17 @@ impl<'a> Editor<'a> {
         Ok(())
     }
 
+    pub fn print_err<W: Write>(&self, w: &mut W, err: impl Display) -> ReplResult<()> {
+        queue!(
+            w,
+            SavePosition,
+            Clear(ClearType::UntilNewLine),
+            Print(err),
+            RestorePosition
+        )?;
+        Ok(())
+    }
+
     /// Prints the characters after the cursor on the current line.
     pub fn print_tail<W: Write>(&self, w: &mut W) -> ReplResult<()> {
         let Self { tail, .. } = self;

repline/src/prebaked.rs

@@ -49,7 +49,7 @@ where F: FnMut(&str) -> Result<Response, Box<dyn Error>> {
             Ok(Response::Deny) => rl.deny(),
             Ok(Response::Break) => break,
             Ok(Response::Continue) => continue,
-            Err(e) => print!("\x1b[40G\x1b[A\x1bJ\x1b[91m{e}\x1b[0m\x1b[B"),
+            Err(e) => rl.print_inline(format_args!("\x1b[40G\x1b[91m{e}\x1b[0m"))?,
         }
     }
     Ok(())

repline/src/repline.rs

@@ -111,6 +111,15 @@ impl<'a, R: Read> Repline<'a, R> {
             }
         }
     }
+    /// Prints a message without moving the cursor
+    pub fn print_inline(&mut self, value: impl std::fmt::Display) -> ReplResult<()> {
+        let mut stdout = stdout().lock();
+        self.print_err(&mut stdout, value)
+    }
+    /// Prints a message (ideally an error) without moving the cursor
+    fn print_err<W: Write>(&mut self, w: &mut W, value: impl std::fmt::Display) -> ReplResult<()> {
+        self.ed.print_err(w, value)
+    }
     /// Handle ANSI Escape
     fn escape<W: Write>(&mut self, w: &mut W) -> ReplResult<()> {
         match self.input.next().ok_or(Error::EndOfInput)?? {