feature/pgtk 7c8da33 084/100: Exclude Xlib's modifier keys

[Yuuki Harano]

branch: feature/pgtk
commit 7c8da336138eb799bcba8583cb18fc8b3cfe7347
Author: Yuuki Harano <masm+github@masm11.me>
Commit: Jeff Walsh <jeff.walsh@drtusers-MacBook-Pro.local>

    Exclude Xlib's modifier keys
    
    * src/pgtkterm.c (IsModifierKey): New macro.
    (key_press_event): Exclude Xlib's modifier keys.
---
 src/pgtkterm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index d62e2a3..224c015 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -5464,6 +5464,12 @@ pgtk_emacs_to_gtk_modifiers (struct pgtk_display_info 
*dpyinfo, int state)
 #define IsMiscFunctionKey(keysym) (0xff60 <= (keysym) && (keysym) < 0xff6c)
 #define IsKeypadKey(keysym)       (0xff80 <= (keysym) && (keysym) < 0xffbe)
 #define IsFunctionKey(keysym)     (0xffbe <= (keysym) && (keysym) < 0xffe1)
+#define IsModifierKey(keysym)                                                  
\
+  ((((keysym) >= GDK_KEY_Shift_L) && ((keysym) <= GDK_KEY_Hyper_R))            
\
+   || (((keysym) >= GDK_KEY_ISO_Lock) && ((keysym) <= 
GDK_KEY_ISO_Level5_Lock))        \
+   || ((keysym) == GDK_KEY_Mode_switch)                                        
        \
+   || ((keysym) == GDK_KEY_Num_Lock))
+
 
 void
 pgtk_enqueue_string (struct frame *f, gchar * str)
@@ -5680,6 +5686,10 @@ key_press_event (GtkWidget * widget, GdkEvent * event, 
gpointer * user_data)
           || (orig_keysym & (1 << 28))
           || (keysym != GDK_KEY_VoidSymbol && nbytes == 0))
          && !(event->key.is_modifier
+              /* Gtk's modifier keys are different from Xlib's ones.
+               * I need to exclude them.
+               */
+              || IsModifierKey (orig_keysym)
               /* The symbols from GDK_KEY_ISO_Lock
                  to GDK_KEY_ISO_Last_Group_Lock
                  don't have real modifiers but