From 9b8de9b59c37a62a7d9b6f2c47727deec307b20a Mon Sep 17 00:00:00 2001
From: Henrixounez <henrix.ounez@yahoo.fr>
Date: Mon, 2 Sep 2019 13:14:40 +0200
Subject: [PATCH] readline: clear the screen on ctrl+l

---
 vlib/readline/readline_lin.v | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/vlib/readline/readline_lin.v b/vlib/readline/readline_lin.v
index b246a28226..1728d65b15 100644
--- a/vlib/readline/readline_lin.v
+++ b/vlib/readline/readline_lin.v
@@ -59,6 +59,7 @@ enum Action {
   history_previous
   history_next
   overwrite
+  clear_screen
 }
 
 // Toggle raw mode of the terminal by changing its attributes
@@ -128,6 +129,7 @@ fn (r Readline) analyse(c byte) Action {
     case 255 : return Action.eof
     case `\n`: return Action.commit_line
     case `\r`: return Action.commit_line
+    case `\f`: return Action.clear_screen // CTRL + L
     case `\b`: return Action.delete_left // Backspace
     case 127 : return Action.delete_left // DEL
     case 27  : return r.analyse_control() // ESC
@@ -189,6 +191,7 @@ fn (r mut Readline) execute(a Action, c byte) bool {
     case Action.move_cursor_end: r.move_cursor_end()
     case Action.move_cursor_word_left: r.move_cursor_word_left()
     case Action.move_cursor_word_right: r.move_cursor_word_right()
+    case Action.clear_screen: r.clear_screen()
   }
   return false
 }
@@ -340,3 +343,9 @@ fn (r mut Readline) move_cursor_word_right() {
     r.refresh_line()
   }
 }
+
+fn (r mut Readline) clear_screen() {
+  term.set_cursor_position(1, 1)
+  term.erase_clear()
+  r.refresh_line()
+}