Add key for toogling numlock handling

Keypad will generate keycodes when keypad application mode is enabled. It
can cause problems with some programs like vi, which operates in such
mode.

This patch change by default don't generate the keycodes never, but this
behaviour can be changed using the combination Alt + NumLock.
---
 config.def.h |   34 ++++++++++++++++++----------------
 st.c         |   17 +++++++++++++++--
 2 files changed, 33 insertions(+), 18 deletions(-)

1 files changed, 18 insertions, 16 deletions

diff --git a/config.def.h b/config.def.h
index 8543ea2..7c55ef2 100644
--- a/config.def.h
+++ b/config.def.h
@@ -62,6 +62,7 @@ static Shortcut shortcuts[] = {
         { MODKEY|ShiftMask,     XK_Prior,       xzoom,          {.i = +1} },
         { MODKEY|ShiftMask,     XK_Next,        xzoom,          {.i = -1} },
         { ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
+        { MODKEY,               XK_Num_Lock,    numlock,        {.i =  0} },
 };
 
 /*
@@ -73,6 +74,7 @@ static Shortcut shortcuts[] = {
  * keypad value:
  * * 0: no value
  * * > 0: keypad application mode enabled
+ * *   = 2: term.numlock = 1
  * * < 0: keypad application mode disabled
  * cursor value:
  * * 0: no value
@@ -123,24 +125,24 @@ static Key key[] = {
         { XK_KP_Insert,     XK_ANY_MOD,     "\033[2~",       0,    0,    0},
         { XK_KP_Delete,     ShiftMask,      "\033[3;2~",     0,    0,    0},
         { XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",       0,    0,    0},
-        { XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +1,    0,    0},
-        { XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +1,    0,    0},
-        { XK_KP_Enter,      XK_ANY_MOD,     "\033OM",       +1,    0,    0},
+        { XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +2,    0,    0},
+        { XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +2,    0,    0},
+        { XK_KP_Enter,      XK_ANY_MOD,     "\033OM",       +2,    0,    0},
         { XK_KP_Enter,      XK_ANY_MOD,     "\r",           -1,    0,   -1},
         { XK_KP_Enter,      XK_ANY_MOD,     "\r\n",         -1,    0,   +1},
-        { XK_KP_Subtract,   XK_ANY_MOD,     "\033Om",       +1,    0,    0},
-        { XK_KP_Decimal,    XK_ANY_MOD,     "\033On",       +1,    0,    0},
-        { XK_KP_Divide,     XK_ANY_MOD,     "\033Oo",       +1,    0,    0},
-        { XK_KP_0,          XK_ANY_MOD,     "\033Op",       +1,    0,    0},
-        { XK_KP_1,          XK_ANY_MOD,     "\033Oq",       +1,    0,    0},
-        { XK_KP_2,          XK_ANY_MOD,     "\033Or",       +1,    0,    0},
-        { XK_KP_3,          XK_ANY_MOD,     "\033Os",       +1,    0,    0},
-        { XK_KP_4,          XK_ANY_MOD,     "\033Ot",       +1,    0,    0},
-        { XK_KP_5,          XK_ANY_MOD,     "\033Ou",       +1,    0,    0},
-        { XK_KP_6,          XK_ANY_MOD,     "\033Ov",       +1,    0,    0},
-        { XK_KP_7,          XK_ANY_MOD,     "\033Ow",       +1,    0,    0},
-        { XK_KP_8,          XK_ANY_MOD,     "\033Ox",       +1,    0,    0},
-        { XK_KP_9,          XK_ANY_MOD,     "\033Oy",       +1,    0,    0},
+        { XK_KP_Subtract,   XK_ANY_MOD,     "\033Om",       +2,    0,    0},
+        { XK_KP_Decimal,    XK_ANY_MOD,     "\033On",       +2,    0,    0},
+        { XK_KP_Divide,     XK_ANY_MOD,     "\033Oo",       +2,    0,    0},
+        { XK_KP_0,          XK_ANY_MOD,     "\033Op",       +2,    0,    0},
+        { XK_KP_1,          XK_ANY_MOD,     "\033Oq",       +2,    0,    0},
+        { XK_KP_2,          XK_ANY_MOD,     "\033Or",       +2,    0,    0},
+        { XK_KP_3,          XK_ANY_MOD,     "\033Os",       +2,    0,    0},
+        { XK_KP_4,          XK_ANY_MOD,     "\033Ot",       +2,    0,    0},
+        { XK_KP_5,          XK_ANY_MOD,     "\033Ou",       +2,    0,    0},
+        { XK_KP_6,          XK_ANY_MOD,     "\033Ov",       +2,    0,    0},
+        { XK_KP_7,          XK_ANY_MOD,     "\033Ow",       +2,    0,    0},
+        { XK_KP_8,          XK_ANY_MOD,     "\033Ox",       +2,    0,    0},
+        { XK_KP_9,          XK_ANY_MOD,     "\033Oy",       +2,    0,    0},
         { XK_BackSpace,     XK_NO_MOD,      "\177",          0,    0,    0},
         { XK_Up,            ShiftMask,      "\033[1;2A",     0,    0,    0},
         { XK_Up,            ControlMask,    "\033[1;5A",     0,    0,    0},