Adding dwmc patch

Makefile

@@ -39,6 +39,7 @@ dist: clean
 install: all
 	mkdir -p ${DESTDIR}${PREFIX}/bin
 	cp -f dwm ${DESTDIR}${PREFIX}/bin
+	#cp -f patch/dwmc ${DESTDIR}${PREFIX}/bin
 	chmod 755 ${DESTDIR}${PREFIX}/bin/dwm
 	mkdir -p ${DESTDIR}${MANPREFIX}/man1
 	sed "s/VERSION/${VERSION}/g" < dwm.1 > ${DESTDIR}${MANPREFIX}/man1/dwm.1

README.md

@@ -13,7 +13,7 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
 
 ### Changelog:
 
-2019-10-07 - Added sortscreens patch
+2019-10-07 - Added sortscreens and dwmc patches
 
 2019-10-06 - Added statuscolors and statusallmons patches, fixed minor cross-compatibility issues for killunsel, fullscreen, noborder, tagintostack patches
 
@@ -101,6 +101,9 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
    - [cyclelayouts](https://dwm.suckless.org/patches/cyclelayouts/)
       - lets you cycle through all your layouts
 
+   - [dwmc](http://dwm.suckless.org/patches/dwmc/)
+      - a simple dwmc client using a fork of fsignal to communicate with dwm
+
    - [emptyview](https://dwm.suckless.org/patches/emptyview/)
       - allows no tag at all to be selected
       - dwm will start with no tag selected and when a client with no tag rule is started and no tag is selected then it will be opened on the first tag

dwm.c

@@ -2069,11 +2069,14 @@ propertynotify(XEvent *e)
 	}
 	#endif // SYSTRAY_PATCH
 
-	if ((ev->window == root) && (ev->atom == XA_WM_NAME))
+	if ((ev->window == root) && (ev->atom == XA_WM_NAME)) {
+		#if DWMC_PATCH
+		if (!fake_signal())
+		#endif // DWMC_PATCH
 		updatestatus();
-	else if (ev->state == PropertyDelete)
+	} else if (ev->state == PropertyDelete) {
 		return; /* ignore */
-	else if ((c = wintoclient(ev->window))) {
+	} else if ((c = wintoclient(ev->window))) {
 		switch(ev->atom) {
 		default: break;
 		case XA_WM_TRANSIENT_FOR:

patch/dwmc

@@ -0,0 +1,40 @@
+#!/usr/bin/env sh
+
+signal() {
+	xsetroot -name "fsignal:$*"
+}
+
+case $# in
+1)
+	case $1 in
+	setlayout | view | viewall | togglebar | togglefloating | zoom | killclient | quit)
+		signal $1
+		;;
+	*)
+		echo "Unknown command or missing one argument."
+		exit 1
+		;;
+	esac
+	;;
+2)
+	case $1 in
+	view)
+		signal $1 ui $2
+		;;
+	viewex | toggleviewex | tagex | toggletagex | setlayoutex | focusstack | incnmaster | focusmon | tagmon)
+		signal $1 i $2
+		;;
+	setmfact)
+		signal $1 f $2
+		;;
+	*)
+		echo "Unknown command or one too many arguments."
+		exit 1
+		;;
+	esac
+	;;
+*)
+	echo "Too many arguments."
+	exit 1
+	;;
+esac

patch/dwmc.c

@@ -0,0 +1,113 @@
+void
+setlayoutex(const Arg *arg)
+{
+	setlayout(&((Arg) { .v = &layouts[arg->i] }));
+}
+
+void
+viewex(const Arg *arg)
+{
+	view(&((Arg) { .ui = 1 << arg->ui }));
+}
+
+void
+viewallex(const Arg *arg)
+{
+	view(&((Arg){.ui = ~0}));
+}
+
+void
+toggleviewex(const Arg *arg)
+{
+	toggleview(&((Arg) { .ui = 1 << arg->ui }));
+}
+
+void
+tagex(const Arg *arg)
+{
+	tag(&((Arg) { .ui = 1 << arg->ui }));
+}
+
+void
+toggletagex(const Arg *arg)
+{
+	toggletag(&((Arg) { .ui = 1 << arg->ui }));
+}
+
+void
+tagallex(const Arg *arg)
+{
+	tag(&((Arg){.ui = ~0}));
+}
+
+/* signal definitions */
+/* signum must be greater than 0 */
+/* trigger signals using `xsetroot -name "fsignal:<signame> [<type> <value>]"` */
+static Signal signals[] = {
+	/* signum           function */
+	{ "focusstack",     focusstack },
+	{ "setmfact",       setmfact },
+	{ "togglebar",      togglebar },
+	{ "incnmaster",     incnmaster },
+	{ "togglefloating", togglefloating },
+	{ "focusmon",       focusmon },
+	{ "tagmon",         tagmon },
+	{ "zoom",           zoom },
+	{ "view",           view },
+	{ "viewall",        viewallex },
+	{ "viewex",         viewex },
+	{ "toggleview",     view },
+	{ "toggleviewex",   toggleviewex },
+	{ "tag",            tag },
+	{ "tagall",         tagallex },
+	{ "tagex",          tagex },
+	{ "toggletag",      tag },
+	{ "toggletagex",    toggletagex },
+	{ "killclient",     killclient },
+	{ "quit",           quit },
+	{ "setlayout",      setlayout },
+	{ "setlayoutex",    setlayoutex },
+};
+
+int
+fake_signal(void)
+{
+	char fsignal[256];
+	char indicator[9] = "fsignal:";
+	char str_sig[50];
+	char param[16];
+	int i, len_str_sig, n, paramn;
+	size_t len_fsignal, len_indicator = strlen(indicator);
+	Arg arg;
+
+	// Get root name property
+	if (gettextprop(root, XA_WM_NAME, fsignal, sizeof(fsignal))) {
+		len_fsignal = strlen(fsignal);
+
+		// Check if this is indeed a fake signal
+		if (len_indicator > len_fsignal ? 0 : strncmp(indicator, fsignal, len_indicator) == 0) {
+			paramn = sscanf(fsignal+len_indicator, "%s%n%s%n", str_sig, &len_str_sig, param, &n);
+
+			if (paramn == 1) arg = (Arg) {0};
+			else if (paramn > 2) return 1;
+			else if (strncmp(param, "i", n - len_str_sig) == 0)
+				sscanf(fsignal + len_indicator + n, "%i", &(arg.i));
+			else if (strncmp(param, "ui", n - len_str_sig) == 0)
+				sscanf(fsignal + len_indicator + n, "%u", &(arg.ui));
+			else if (strncmp(param, "f", n - len_str_sig) == 0)
+				sscanf(fsignal + len_indicator + n, "%f", &(arg.f));
+			else return 1;
+
+			// Check if a signal was found, and if so handle it
+			for (i = 0; i < LENGTH(signals); i++)
+				if (strncmp(str_sig, signals[i].sig, len_str_sig) == 0 && signals[i].func)
+					signals[i].func(&(arg));
+
+			// A fake signal was sent
+			return 1;
+		}
+	}
+
+	// No fake signal was sent, so proceed with update
+	return 0;
+}

patch/dwmc.h

@@ -0,0 +1,13 @@
+typedef struct {
+	const char * sig;
+	void (*func)(const Arg *);
+} Signal;
+
+static void setlayoutex(const Arg *arg);
+static void viewex(const Arg *arg);
+static void viewallex(const Arg *arg);
+static void toggleviewex(const Arg *arg);
+static void tagex(const Arg *arg);
+static void toggletagex(const Arg *arg);
+static void tagallex(const Arg *arg);
+static int fake_signal(void);

patch/include.c

@@ -36,6 +36,10 @@
 #include "cyclelayouts.c"
 #endif
 
+#if DWMC_PATCH
+#include "dwmc.c"
+#endif
+
 #if EWMHTAGS_PATCH
 #include "ewmhtags.c"
 #endif

patch/include.h

@@ -36,6 +36,10 @@
 #include "cyclelayouts.h"
 #endif
 
+#if DWMC_PATCH
+#include "dwmc.h"
+#endif
+
 #if EWMHTAGS_PATCH
 #include "ewmhtags.h"
 #endif

patches.h

@@ -115,6 +115,13 @@
  */
 #define CYCLELAYOUTS_PATCH 0
 
+/* Simple dwmc client using a fork of fsignal to communicate with dwm.
+ * To use this either copy the patch/dwmc shell script to somewhere in your path or
+ * uncomment the following line in Makefile: #cp -f patch/dwmc ${DESTDIR}${PREFIX}/bin
+ * http://dwm.suckless.org/patches/dwmc/
+ */
+#define DWMC_PATCH 0
+
 /* This patch allows no tag at all to be selected. The result is that dwm will start with
  * no tag selected and when you start a client with no tag rule and no tag selected then
  * it will be opened on the first tag.