feat: add support for rendering text (i.e. tabs)

This allows to have differences between the "raw" content of the buffer
and its visualization on screen. At the time of writing this handles the
rendering of tabs (i.e. '\t') as a fixed amount of spaces, but will be
useful for syntax highlighting as well.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/key.ml b/lib/key.ml
index 85aa282..d6656c5 100644
--- a/lib/key.ml
+++ b/lib/key.ml
@@ -16,6 +16,7 @@ type key =
   | Nul
   | Page_down
   | Page_up
+  | Tab
 
 type t = key
 
@@ -24,6 +25,7 @@ let key c = Key c
 
 let of_char = function
   | '\000' -> Nul
+  | '\009' -> Tab
   | '\013' -> Enter
   | '\027' -> Esc
   | '\127' -> Backspace