process_unicode: Small refactor & linux fix

This moves the unicode input start / end sequences into their own
functions, so keymaps and other functionality can build on it too.

At the same time, it changes how the Linux variant works, to match
reality: CTRL+SHIFT must be unregistered too, and we close the thing
with a Space instead.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

quantum/process_keycode/process_unicode.c

@@ -18,9 +18,7 @@ void set_unicode_input_mode(uint8_t os_target)
   input_mode = os_target;
 }
 
-bool process_unicode(uint16_t keycode, keyrecord_t *record) {
+void unicode_input_start (void) {
-  if (keycode > QK_UNICODE && record->event.pressed) {
-    uint16_t unicode = keycode & 0x7FFF;
   switch(input_mode) {
   case UC_OSX:
     register_code(KC_LALT);
@@ -30,6 +28,8 @@ bool process_unicode(uint16_t keycode, keyrecord_t *record) {
     register_code(KC_LSFT);
     register_code(KC_U);
     unregister_code(KC_U);
+    unregister_code(KC_LSFT);
+    unregister_code(KC_LCTL);
     break;
   case UC_WIN:
     register_code(KC_LALT);
@@ -37,21 +37,35 @@ bool process_unicode(uint16_t keycode, keyrecord_t *record) {
     unregister_code(KC_PPLS);
     break;
   }
-    for(int i = 3; i >= 0; i--) {
+}
-        uint8_t digit = ((unicode >> (i*4)) & 0xF);
+
-        register_code(hex_to_keycode(digit));
+void unicode_input_finish (void) {
-        unregister_code(hex_to_keycode(digit));
-    }
   switch(input_mode) {
   case UC_OSX:
   case UC_WIN:
     unregister_code(KC_LALT);
     break;
   case UC_LNX:
-        unregister_code(KC_LCTL);
+    register_code(KC_SPC);
-        unregister_code(KC_LSFT);
+    unregister_code(KC_SPC);
     break;
   }
+}
+
+void register_hex(uint16_t hex) {
+  for(int i = 3; i >= 0; i--) {
+    uint8_t digit = ((hex >> (i*4)) & 0xF);
+    register_code(hex_to_keycode(digit));
+    unregister_code(hex_to_keycode(digit));
+  }
+}
+
+bool process_unicode(uint16_t keycode, keyrecord_t *record) {
+  if (keycode > QK_UNICODE && record->event.pressed) {
+    uint16_t unicode = keycode & 0x7FFF;
+    unicode_input_start();
+    register_hex(unicode);
+    unicode_input_finish();
   }
   return true;
 }

quantum/process_keycode/process_unicode.h

@@ -9,6 +9,9 @@
 #define UC_BSD 3
 
 void set_unicode_input_mode(uint8_t os_target);
+void unicode_input_start(void);
+void unicode_input_finish(void);
+void register_hex(uint16_t hex);
 
 bool process_unicode(uint16_t keycode, keyrecord_t *record);