From d3f52cf5dc1e06a81fb75a8631ac00e8adc04ac7 Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rosehogenson@posteo.net>
Date: Sat, 13 Jan 2024 17:45:37 -0800
Subject: Escape control characters.

---
 src/main.rs | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index 0cc9ad4..3663052 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -21,7 +21,7 @@ fn line_offset(stdin: &mut Reader, line: &Rope, col: u16) -> Result<usize, Box<d
             return Ok(i);
         }
         let c = line.byte(i);
-        if c > 127 {
+        if !(c == b'\t' || b' ' <= c && c <= b'~') {
             break;
         }
         if n == col {
@@ -231,12 +231,12 @@ impl State {
     }
 
     fn keypress(&mut self, key: Key) -> Result<bool, Box<dyn Error>> {
-        const CTRL_Q: char = (b'Q' - b'@') as char;
-        const CTRL_S: char = (b'S' - b'@') as char;
-        const CTRL_Y: char = (b'Y' - b'@') as char;
-        const CTRL_Z: char = (b'Z' - b'@') as char;
-        const BACKSPACE: char = (b'H' - b'@') as char;
-        const OTHER_BACKSPACE: char = '\x7f';
+        const CTRL_Q: char = (b'Q' ^ b'@') as char;
+        const CTRL_S: char = (b'S' ^ b'@') as char;
+        const CTRL_Y: char = (b'Y' ^ b'@') as char;
+        const CTRL_Z: char = (b'Z' ^ b'@') as char;
+        const BACKSPACE: char = (b'H' ^ b'@') as char;
+        const OTHER_BACKSPACE: char = (b'?' ^ b'@') as char;
 
         let inserting = self.inserting;
         self.inserting = false;
@@ -448,7 +448,7 @@ impl State {
             }
             Key::Char(CTRL_S) => {
                 let mut f = File::create(&self.path)?;
-                self.buf.print(&mut f)?;
+                self.buf.write(&mut f)?;
                 f.sync_all()?;
             }
             Key::Char(CTRL_Z) => {
@@ -546,15 +546,15 @@ impl State {
                     .line_start(self.row_start + usize::from(self.cursor_row))
                     + self.line_offset;
                 let mut buf = [0; 4];
-                let s = c.encode_utf8(&mut buf);
+                let r = Rope::new(c.encode_utf8(&mut buf));
                 self.buf = self
                     .buf
                     .slice(0, offset)
-                    .concat(&Rope::new(s))
+                    .concat(&r)
                     .concat(&self.buf.slice(offset, self.buf.len()));
-                self.line_offset += s.len();
+                self.line_offset += r.len();
                 self.need_repaint_line = true;
-                stdout().write_all(s.as_bytes())?;
+                r.print(&mut stdout())?;
                 stdout().flush()?;
             }
         }
-- 
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