dwmc: Adding external control to set gaps

config.def.h

@@ -514,6 +514,9 @@ static Signal signals[] = {
 	{ "toggleverticalexpand",    toggleverticalexpand },
 	{ "togglemaximize",          togglemaximize },
 	#endif // EXRESIZE_PATCH
+	#if KEYMODES_PATCH
+	{ "setkeymode",              setkeymode },
+	#endif // KEYMODES_PATCH
 	#if TRANSFER_PATCH
 	{ "transfer",                transfer },
 	#endif // TRANSFER_PATCH
@@ -532,6 +535,7 @@ static Signal signals[] = {
 	{ "incrovgaps",              incrovgaps },
 	{ "togglegaps",              togglegaps },
 	{ "defaultgaps",             defaultgaps },
+	{ "setgaps",                 setgapsex },
 	#endif // VANITYGAPS_PATCH
 	{ "view",                    view },
 	{ "viewall",                 viewallex },

patch/dwmc

@@ -47,7 +47,7 @@ case $# in
 		signal $1
 		;;
 	*)
-		echo "Unknown command or missing one argument."
+		echo "Unknown command ($1) or missing one argument."
 		exit 1
 		;;
 	esac
@@ -58,6 +58,7 @@ case $# in
 	explace) ;&
 	moveplace) ;&
 	mpdchange) ;&
+	setkeymode) ;&
 	switchtag) ;&
 	togglescratch) ;&
 	view)
@@ -70,6 +71,7 @@ case $# in
 	tagex) ;&
 	toggletagex) ;&
 	setborderpx) ;&
+	setgaps) ;&
 	setlayoutex) ;&
 	setlayoutaxisex) ;&
 	swapfocus) ;&
@@ -99,13 +101,30 @@ case $# in
 		signal $1 f $2
 		;;
 	*)
-		echo "Unknown command or one too many arguments."
+		echo "Unknown command ($1) or too many arguments"
+		exit 1
+		;;
+	esac
+	;;
+5)
+	case $1 in
+	setgaps)
+		# Expects "setgaps oh ov ih iv" where -1 means to keep existing values
+		[ $2 = -1 ] && oh=128 || oh=$2
+		[ $3 = -1 ] && ov=128 || ov=$3
+		[ $4 = -1 ] && ih=128 || ih=$4
+		[ $5 = -1 ] && iv=128 || iv=$5
+		echo $(((oh << 24) + (ov << 16) + (ih << 8) + iv))
+		signal $1 i $(((oh << 24) + (ov << 16) + (ih << 8) + iv))
+		;;
+	*)
+		echo "Unknown command ($1) or too many arguments"
 		exit 1
 		;;
 	esac
 	;;
 *)
-	echo "Too many arguments."
+	echo "Unknown command ($1) or too many arguments"
 	exit 1
 	;;
 esac

patch/vanitygaps.c

@@ -18,6 +18,60 @@ setgaps(int oh, int ov, int ih, int iv)
 	arrange(selmon);
 }
 
+#if DWMC_PATCH
+/* External function that takes one integer and splits it
+ * into four gap values:
+ *    - outer horizontal (oh)
+ *    - outer vertical (ov)
+ *    - inner horizontal (ih)
+ *    - inner vertical (iv)
+ *
+ * Each value is represented as one byte with the uppermost
+ * bit of each byte indicating whether or not to keep the
+ * current value.
+ *
+ * Example:
+ *
+ *   10000000   10000000   00001111   00001111
+ *   |          |          |          |
+ *   + keep oh  + keep ov  + ih 15px  + iv 15px
+ *
+ * This gives an int of:
+ *   10000000100000000000111100001111 = 2155876111
+ *
+ * Thus this command should set inner gaps to 15:
+ *   xsetroot -name "fsignal:setgaps i 2155876111"
+ */
+static void
+setgapsex(const Arg *arg)
+{
+	int oh = selmon->gappoh;
+	int ov = selmon->gappov;
+	int ih = selmon->gappih;
+	int iv = selmon->gappiv;
+
+	if (!(arg->i & (1 << 31)))
+		oh = (arg->i & 0x7f000000) >> 24;
+	if (!(arg->i & (1 << 23)))
+		ov = (arg->i & 0x7f0000) >> 16;
+	if (!(arg->i & (1 << 15)))
+		ih = (arg->i & 0x7f00) >> 8;
+	if (!(arg->i & (1 << 7)))
+		iv = (arg->i & 0x7f);
+
+	/* Auto enable gaps if disabled */
+	#if PERTAG_PATCH
+	if (!selmon->pertag->enablegaps[selmon->pertag->curtag])
+		selmon->pertag->enablegaps[selmon->pertag->curtag] = 1;
+	#else
+	if (!enablegaps)
+		enablegaps = 1;
+	#endif // PERTAG_PATCH
+
+	setgaps(oh, ov, ih, iv);
+}
+#endif // DWMC_PATCH
+
 static void
 togglegaps(const Arg *arg)
 {

patch/vanitygaps.h

@@ -13,4 +13,7 @@ static void togglegaps(const Arg *arg);
 #if DRAGMFACT_PATCH || CENTEREDMASTER_LAYOUT || CENTEREDFLOATINGMASTER_LAYOUT || COLUMNS_LAYOUT || DECK_LAYOUT || FIBONACCI_DWINDLE_LAYOUT || FIBONACCI_SPIRAL_LAYOUT || GAPPLESSGRID_LAYOUT || NROWGRID_LAYOUT || HORIZGRID_LAYOUT || BSTACK_LAYOUT || BSTACKHORIZ_LAYOUT || GRIDMODE_LAYOUT || FLEXTILE_DELUXE_LAYOUT || TILE_LAYOUT || (VANITYGAPS_MONOCLE_PATCH && MONOCLE_LAYOUT)
 static void getgaps(Monitor *m, int *oh, int *ov, int *ih, int *iv, unsigned int *nc);
 #endif
-static void setgaps(int oh, int ov, int ih, int iv);
+static void setgaps(int oh, int ov, int ih, int iv);
+#if DWMC_PATCH
+static void setgapsex(const Arg *arg);
+#endif // DWMC_PATCH