commit b3bbd17e5c557463991a6fb193fcfe299817e542
Author: Peng Wu <alexepico@gmail.com>
Date:   Thu Apr 18 15:05:47 2019 +0800

    Do not commit text when reset signal is received
    
    ibus-hangul uses ibus_engine_update_preedit_text_with_mode() to
    commit the preedit text by ibus-daemon and now focus-out and
    mouse click are handled by ibus-daemon and ibus clients.
    
    BUG=https://github.com/ibus/ibus/issues/1980

Index: ibus-hangul-1.5.1/src/engine.c
===================================================================
--- ibus-hangul-1.5.1.orig/src/engine.c
+++ ibus-hangul-1.5.1/src/engine.c
@@ -1351,7 +1351,16 @@ ibus_hangul_engine_reset (IBusEngine *en
 {
     IBusHangulEngine *hangul = (IBusHangulEngine *) engine;
 
+#if IBUS_CHECK_VERSION(1, 5, 20)
+    // ibus-hangul uses
+    // ibus_engine_update_preedit_text_with_mode() function which makes
+    // the preedit string committed automatically when the reset is received
+    // So we don't need to commit the preedit here.
+    hangul_ic_reset (hangul->context);
+    ustring_clear (hangul->preedit);
+#endif
     ibus_hangul_engine_flush (hangul);
+
     IBUS_ENGINE_CLASS (parent_class)->reset (engine);
 }