From d1b3cf663372d3cb28030f80609aff8a8df8a930 Mon Sep 17 00:00:00 2001
From: MovingtoMars <liam@bumblebee.net.nz>
Date: Sat, 11 Jun 2016 11:23:30 +1200
Subject: [PATCH] add move_cursor_{left,right} to TermWrite

---
 src/control.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/control.rs b/src/control.rs
index 24a68d2..1899b1d 100644
--- a/src/control.rs
+++ b/src/control.rs
@@ -43,6 +43,32 @@ pub trait TermWrite {
     fn hide_cursor(&mut self) -> io::Result<usize> {
         self.csi(b"?25l")
     }
+    /// Move the cursor `num` spaces to the left.
+    fn move_cursor_left(&mut self, num: u32) -> io::Result<usize> {
+        if num > 0 {
+            self.csi(&[b'0' + (num / 10000) as u8,
+                       b'0' + (num / 1000) as u8 % 10,
+                       b'0' + (num / 100) as u8 % 10,
+                       b'0' + (num / 10) as u8 % 10,
+                       b'0' + num as u8 % 10,
+                       b'C'])
+        } else {
+            Ok(0)
+        }
+    }
+    /// Move the cursor `num` spaces to the right.
+    fn move_cursor_right(&mut self, num: u32) -> io::Result<usize> {
+        if num > 0 {
+            self.csi(&[b'0' + (num / 10000) as u8,
+                       b'0' + (num / 1000) as u8 % 10,
+                       b'0' + (num / 100) as u8 % 10,
+                       b'0' + (num / 10) as u8 % 10,
+                       b'0' + num as u8 % 10,
+                       b'D'])
+        } else {
+            Ok(0)
+        }
+    }
 
     // TODO
     // fn mode