From cda036ce701e353da6e10899e55d4423cc629fc5 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Thu, 23 Mar 2023 21:22:12 +0100
Subject: [PATCH] ConsoleDevice: Use a temporary buffer for backspace handling

---
 kernel/src/fs/devices/ConsoleDevice.cpp | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/kernel/src/fs/devices/ConsoleDevice.cpp b/kernel/src/fs/devices/ConsoleDevice.cpp
index d02f359a..734a625c 100644
--- a/kernel/src/fs/devices/ConsoleDevice.cpp
+++ b/kernel/src/fs/devices/ConsoleDevice.cpp
@@ -2,6 +2,7 @@
 #include "video/TextConsole.h"
 #include <luna/Buffer.h>
 #include <luna/CString.h>
+#include <luna/Vector.h>
 
 static Buffer g_console_input;
 
@@ -34,7 +35,24 @@ bool ConsoleDevice::blocking() const
     return g_console_input.size() == 0;
 }
 
+static Vector<u8> g_temp_input;
+
 void ConsoleDevice::did_press_key(char key)
 {
-    *g_console_input.slice_at_end(1).value() = (u8)key;
+    if (key == '\b')
+    {
+        if (g_temp_input.try_pop().has_value()) TextConsole::putwchar(L'\b');
+
+        return;
+    }
+
+    g_temp_input.try_append(key).value();
+
+    if (key == '\n')
+    {
+        g_console_input.append_data(g_temp_input.data(), g_temp_input.size()).value();
+        g_temp_input.clear();
+    }
+
+    TextConsole::putchar(key);
 }