From 942e67e5070e34ee85ce4f87ee33740e88b5217f Mon Sep 17 00:00:00 2001
From: Pk11 <epicpkmn11@outlook.com>
Date: Sat, 21 Aug 2021 16:57:23 -0500
Subject: [PATCH] Add Unicode hex input

---
 arm9/source/common/swkbd.c | 25 +++++++++++++++++++++++++
 arm9/source/common/swkbd.h |  7 ++++---
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/arm9/source/common/swkbd.c b/arm9/source/common/swkbd.c
index 6cf79b9..978e896 100644
--- a/arm9/source/common/swkbd.c
+++ b/arm9/source/common/swkbd.c
@@ -3,6 +3,7 @@
 #include "swkbd.h"
 #include "timer.h"
 #include "hid.h"
+#include "utf.h"
 
 
 static inline char to_uppercase(char c) {
@@ -332,6 +333,30 @@ bool ShowKeyboard(char* inputstr, const u32 max_size, const char *format, ...) {
         } else if (key == KEY_SWITCH) {
             ClearScreen(BOT_SCREEN, COLOR_STD_BG);
             return ShowStringPrompt(inputstr, max_size, str);
+        } else if (key == KEY_UNICODE) {
+            if (cursor > 3 && cursor <= inputstr_size) {
+                u16 codepoint = 0;
+                for (char *c = inputstr + cursor - 4; c < inputstr + cursor; c++) {
+                    if ((*c >= '0' && *c <= '9') || (*c >= 'A' && *c <= 'F') || (*c >= 'a' && *c <= 'f')) {
+                        codepoint <<= 4;
+                        codepoint |= *c - (*c <= '9' ? '0' : ((*c <= 'F' ? 'A' : 'a') - 10));
+                    } else {
+                        codepoint = 0;
+                        break;
+                    }
+                }
+
+                if(codepoint != 0) {
+                    char character[5] = {0};
+                    u16 input[2] = {codepoint, 0};
+                    utf16_to_utf8((u8*)character, input, 4, 1);
+
+                    u32 char_size = GetCharSize(character);
+                    memmove(inputstr + cursor - 4 + char_size, inputstr + cursor, max_size - cursor + 4 - char_size);
+                    memcpy(inputstr + cursor - 4, character, char_size);
+                    cursor -= 4 - char_size;
+                }
+            }
         } else if (key && (key < 0x80)) {
             if ((cursor < (max_size-1)) && (inputstr_size < max_size)) {
                 // pad string (if cursor beyound string size)
diff --git a/arm9/source/common/swkbd.h b/arm9/source/common/swkbd.h
index 1369ab0..b81ec0d 100644
--- a/arm9/source/common/swkbd.h
+++ b/arm9/source/common/swkbd.h
@@ -19,11 +19,12 @@ enum {
     KEY_RIGHT   = 0x89,
     KEY_ESCAPE  = 0x8A,
     KEY_SWITCH  = 0x8B,
+    KEY_UNICODE = 0x8C,
     KEY_TXTBOX  = 0xFF
 };
 
 // special key strings
-#define SWKBD_KEYSTR "", "DEL", "INS", "SUBMIT", "CAPS", "#$@", "123", "ABC", "←", "→", "ESC", "SWITCH"
+#define SWKBD_KEYSTR "", "DEL", "INS", "SUBMIT", "CAPS", "#$@", "123", "ABC", "←", "→", "ESC", "SWITCH", "U+"
 
 #define COLOR_SWKBD_NORMAL  COLOR_GREY
 #define COLOR_SWKBD_PRESSED COLOR_LIGHTGREY
@@ -56,7 +57,7 @@ enum {
     '4', '5', '6', 'D', 'C', \
     '3', '2', '1', 'B', 'A', \
     '0', '.', '_', KEY_LEFT, KEY_RIGHT, \
-    KEY_ALPHA, ' ', KEY_BKSPC
+    KEY_ALPHA, KEY_UNICODE, ' ', KEY_BKSPC
 
 // offset, num of keys in row, width of special keys (...), 0
 #define SWKBD_LAYOUT_ALPHABET \
@@ -80,7 +81,7 @@ enum {
     5, 0, \
     5, 0, \
     5, 18, 18, 0, \
-    3, 30, 34, 30, 0, \
+    4, 20, 20, 31, 20, 0, \
     0