From 30b80a23f3cafd846937b37b249f2df4411e1f5a Mon Sep 17 00:00:00 2001
From: Priyadi Iman Nurcahyo <priyadi@priyadi.net>
Date: Mon, 9 Jan 2017 02:59:10 +0700
Subject: [PATCH] Unregister all mods before inputting Unicode, and reregister
 afterwards

---
 quantum/process_keycode/process_unicode.c | 41 ++++++++++++++++++-----
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/quantum/process_keycode/process_unicode.c b/quantum/process_keycode/process_unicode.c
index cd3a610b4..a30e93ae3 100644
--- a/quantum/process_keycode/process_unicode.c
+++ b/quantum/process_keycode/process_unicode.c
@@ -1,6 +1,8 @@
 #include "process_unicode.h"
+#include "action_util.h"
 
 static uint8_t input_mode;
+uint8_t mods;
 
 __attribute__((weak))
 uint16_t hex_to_keycode(uint8_t hex)
@@ -25,6 +27,19 @@ uint8_t get_unicode_input_mode(void) {
 
 __attribute__((weak))
 void unicode_input_start (void) {
+  // save current mods
+  mods = keyboard_report->mods;
+
+  // unregister all mods to start from clean state
+  if (mods & MOD_BIT(KC_LSFT)) unregister_code(KC_LSFT);
+  if (mods & MOD_BIT(KC_RSFT)) unregister_code(KC_RSFT);
+  if (mods & MOD_BIT(KC_LCTL)) unregister_code(KC_LCTL);
+  if (mods & MOD_BIT(KC_RCTL)) unregister_code(KC_RCTL);
+  if (mods & MOD_BIT(KC_LALT)) unregister_code(KC_LALT);
+  if (mods & MOD_BIT(KC_RALT)) unregister_code(KC_RALT);
+  if (mods & MOD_BIT(KC_LGUI)) unregister_code(KC_LGUI);
+  if (mods & MOD_BIT(KC_RGUI)) unregister_code(KC_RGUI);
+
   switch(input_mode) {
   case UC_OSX:
     register_code(KC_LALT);
@@ -54,15 +69,25 @@ void unicode_input_start (void) {
 __attribute__((weak))
 void unicode_input_finish (void) {
   switch(input_mode) {
-  case UC_OSX:
-  case UC_WIN:
-    unregister_code(KC_LALT);
-    break;
-  case UC_LNX:
-    register_code(KC_SPC);
-    unregister_code(KC_SPC);
-    break;
+    case UC_OSX:
+    case UC_WIN:
+      unregister_code(KC_LALT);
+      break;
+    case UC_LNX:
+      register_code(KC_SPC);
+      unregister_code(KC_SPC);
+      break;
   }
+
+  // reregister previously set mods
+  if (mods & MOD_BIT(KC_LSFT)) register_code(KC_LSFT);
+  if (mods & MOD_BIT(KC_RSFT)) register_code(KC_RSFT);
+  if (mods & MOD_BIT(KC_LCTL)) register_code(KC_LCTL);
+  if (mods & MOD_BIT(KC_RCTL)) register_code(KC_RCTL);
+  if (mods & MOD_BIT(KC_LALT)) register_code(KC_LALT);
+  if (mods & MOD_BIT(KC_RALT)) register_code(KC_RALT);
+  if (mods & MOD_BIT(KC_LGUI)) register_code(KC_LGUI);
+  if (mods & MOD_BIT(KC_RGUI)) register_code(KC_RGUI);
 }
 
 void register_hex(uint16_t hex) {