fix custom key handling.

config.def.h

@@ -25,34 +25,40 @@ static const char *colorname[] = {
 	"white"
 };
 
-/* Default colors (colorname index) */
-/* foreground, background, cursor   */
+/* Default colors (colorname index)
+   foreground, background, cursor   */
 #define DefaultFG 7
 #define DefaultBG 0
 #define DefaultCS 1
 
-/* Special keys (change & recompile st.info accordingly) */
-/*    key,        mask,  output */
+/* Special keys (change & recompile st.info accordingly)
+   Keep in mind that kpress() in st.c hardcodes some keys.
+
+   Mask value:
+   * Use XK_ANY_MOD to match the key no matter modifiers state
+   * Use XK_NO_MOD to match the key alone (no modifiers)
+   
+      key,        mask,  output */
 static Key key[] = {
-	{ XK_BackSpace, 0, "\177" },
-	{ XK_Insert,    0, "\033[2~" },
-	{ XK_Delete,    0, "\033[3~" },
-	{ XK_Home,      0, "\033[1~" },
-	{ XK_End,       0, "\033[4~" },
-	{ XK_Prior,     0, "\033[5~" },
-	{ XK_Next,      0, "\033[6~" },
-	{ XK_F1,        0, "\033OP"   },
-	{ XK_F2,        0, "\033OQ"   },
-	{ XK_F3,        0, "\033OR"   },
-	{ XK_F4,        0, "\033OS"   },
-	{ XK_F5,        0, "\033[15~" },
-	{ XK_F6,        0, "\033[17~" },
-	{ XK_F7,        0, "\033[18~" },
-	{ XK_F8,        0, "\033[19~" },
-	{ XK_F9,        0, "\033[20~" },
-	{ XK_F10,       0, "\033[21~" },
-	{ XK_F11,       0, "\033[23~" },
-	{ XK_F12,       0, "\033[24~" },
+	{ XK_BackSpace, XK_NO_MOD, "\177" },
+   	{ XK_Insert,    XK_NO_MOD, "\033[2~" },
+	{ XK_Delete,    XK_NO_MOD, "\033[3~" },
+	{ XK_Home,      XK_NO_MOD, "\033[1~" },
+	{ XK_End,       XK_NO_MOD, "\033[4~" },
+	{ XK_Prior,     XK_NO_MOD, "\033[5~" },
+	{ XK_Next,      XK_NO_MOD, "\033[6~" },
+	{ XK_F1,        XK_NO_MOD, "\033OP"   },
+	{ XK_F2,        XK_NO_MOD, "\033OQ"   },
+	{ XK_F3,        XK_NO_MOD, "\033OR"   },
+	{ XK_F4,        XK_NO_MOD, "\033OS"   },
+	{ XK_F5,        XK_NO_MOD, "\033[15~" },
+	{ XK_F6,        XK_NO_MOD, "\033[17~" },
+	{ XK_F7,        XK_NO_MOD, "\033[18~" },
+	{ XK_F8,        XK_NO_MOD, "\033[19~" },
+	{ XK_F9,        XK_NO_MOD, "\033[20~" },
+	{ XK_F10,       XK_NO_MOD, "\033[21~" },
+	{ XK_F11,       XK_NO_MOD, "\033[23~" },
+	{ XK_F12,       XK_NO_MOD, "\033[24~" },
 };
 
 /* Line drawing characters (sometime specific to each font...) */

st.c

@@ -43,6 +43,8 @@
 #define ESC_ARG_SIZ   16
 #define DRAW_BUF_SIZ  1024
 #define UTF_SIZ       4
+#define XK_NO_MOD     UINT_MAX
+#define XK_ANY_MOD    0
 
 #define SERRNO strerror(errno)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
@@ -1833,9 +1835,12 @@ focus(XEvent *ev) {
 char*
 kmap(KeySym k, unsigned int state) {
 	int i;
-	for(i = 0; i < LEN(key); i++)
-		if(key[i].k == k && (key[i].mask == 0 || key[i].mask & state))
+	state &= ~Mod2Mask;
+	for(i = 0; i < LEN(key); i++) {
+		unsigned int mask = key[i].mask;
+		if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
 			return (char*)key[i].s;
+	}
 	return NULL;
 }