From 596ef772d75b6ec50f196c1f9288d3dc5391b8d6 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Sun, 23 May 2021 20:42:54 +0200
Subject: Fix control keys on keyboard mode

---
 src/filesystem.c      |  4 ++--
 src/main.c            | 31 ++++++++++++++++++++++++++++++-
 src/uxn/devices/ppu.c |  4 ++--
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/src/filesystem.c b/src/filesystem.c
index 69e23f7..5732e40 100644
--- a/src/filesystem.c
+++ b/src/filesystem.c
@@ -3,11 +3,11 @@
 // Note that the filename should include the null terminator if we want to use
 // strcmp.
 #define FILE_NAME_SIZE     27
-#define FILE_CAPACITY      63
+#define FILE_CAPACITY      4
 #define FILE_HEADER_OFFSET 2
 #define FILE_INDEX_OFFSET  32
 #define FILE_DATA_OFFSET   KB(2)
-#define FILE_MAX_SIZE      KB(1)
+#define FILE_MAX_SIZE      KB(16)
 #define SRAM               ((vu8*)(MEM_CART))
 
 typedef struct File {
diff --git a/src/main.c b/src/main.c
index 17e0127..b075f4a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -288,7 +288,36 @@ handle_input(Uxn *u) {
             update_cursor(cursor_position + KEYBOARD_ROW_SIZE);
         }
         if (key_tap(KEY_B)) {
-			devctrl->dat[3] = keyboard[cursor_position].symbol;
+            u8 symbol = keyboard[cursor_position].symbol;
+            switch (symbol) {
+                case 0x7f: {
+                    // Backspace.
+                    devctrl->dat[3] = 0x08;
+                } break;
+                case 0x14: {
+                    // New line.
+                    devctrl->dat[3] = 0x0d;
+                } break;
+                case 0x18: {
+                    // Arrow up.
+                    devctrl->dat[2] = 0x10;
+                } break;
+                case 0x19: {
+                    // Arrow down.
+                    devctrl->dat[2] = 0x20;
+                } break;
+                case 0x1b: {
+                    // Arrow left.
+                    devctrl->dat[2] = 0x40;
+                } break;
+                case 0x1a: {
+                    // Arrow right.
+                    devctrl->dat[2] = 0x80;
+                } break;
+                default: {
+                    devctrl->dat[3] = symbol;
+                } break;
+            }
             evaluxn(u, mempeek16(devctrl->dat, 0));
             devctrl->dat[3] = 0;
         }
diff --git a/src/uxn/devices/ppu.c b/src/uxn/devices/ppu.c
index 4a5a13d..e453726 100644
--- a/src/uxn/devices/ppu.c
+++ b/src/uxn/devices/ppu.c
@@ -316,8 +316,8 @@ KeyboardChar keyboard[] = {
     {0, 0, '('}, {0, 0, ')'}, {0, 0, '['}, {0, 0, ']'}, {0, 0, '{'}, {0, 0, '}'}, {0, 0, '<'}, {0, 0, '>'}, {0, 0, '+'}, {0, 0, '-'}, {0, 0, '='},  {0, 0, 0x14},
     {0, 0, '0'}, {0, 0, '1'}, {0, 0, '2'}, {0, 0, '3'}, {0, 0, '4'}, {0, 0, '5'}, {0, 0, '6'}, {0, 0, '7'}, {0, 0, '8'}, {0, 0, '9'}, {0, 0, '~'},  {0, 0, 0x18},
     {0, 0, 'a'}, {0, 0, 'b'}, {0, 0, 'c'}, {0, 0, 'd'}, {0, 0, 'e'}, {0, 0, 'f'}, {0, 0, 'g'}, {0, 0, 'h'}, {0, 0, 'i'}, {0, 0, 'j'}, {0, 0, '/'},  {0, 0, 0x19},
-    {0, 0, 'k'}, {0, 0, 'l'}, {0, 0, 'm'}, {0, 0, 'n'}, {0, 0, 'o'}, {0, 0, 'p'}, {0, 0, 'q'}, {0, 0, 'r'}, {0, 0, 's'}, {0, 0, 't'}, {0, 0, '\\'}, {0, 0, 0x1a},
-    {0, 0, 'u'}, {0, 0, 'v'}, {0, 0, 'w'}, {0, 0, 'x'}, {0, 0, 'y'}, {0, 0, 'z'}, {0, 0, ','}, {0, 0, '.'}, {0, 0, ';'}, {0, 0, ':'}, {0, 0, '_'},  {0, 0, 0x1b},
+    {0, 0, 'k'}, {0, 0, 'l'}, {0, 0, 'm'}, {0, 0, 'n'}, {0, 0, 'o'}, {0, 0, 'p'}, {0, 0, 'q'}, {0, 0, 'r'}, {0, 0, 's'}, {0, 0, 't'}, {0, 0, '\\'}, {0, 0, 0x1b},
+    {0, 0, 'u'}, {0, 0, 'v'}, {0, 0, 'w'}, {0, 0, 'x'}, {0, 0, 'y'}, {0, 0, 'z'}, {0, 0, ','}, {0, 0, '.'}, {0, 0, ';'}, {0, 0, ':'}, {0, 0, '_'},  {0, 0, 0x1a},
 };
 
 void
-- 
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