Adding nametag patch

README.md

@@ -19,6 +19,8 @@ Browsing patches? There is a [map of patches](https://coggle.it/diagram/X9IiSSM6
 
 ### Changelog:
 
+2022-08-12 - Added the nametag patch
+
 2022-08-02 - Added the bidi patch
 
 2022-07-05 - Added the tagpreview patch
@@ -528,6 +530,9 @@ Browsing patches? There is a [map of patches](https://coggle.it/diagram/X9IiSSM6
    - [movestack](https://dwm.suckless.org/patches/movestack/)
       - allows you to move clients around in the stack and swap them with the master
 
+   - [nametag](https://dwm.suckless.org/patches/nametag/)
+      - allows the names of tags to be changed during runtime
+
    - [netclientliststacking](https://github.com/bakkeby/patches/wiki/netclientliststacking)
       - adds support for the \_NET\_CLIENT\_LIST\_STACKING atom, needed by certain applications
         like the Zoom video conferencing application

config.def.h

@@ -106,6 +106,22 @@ static const unsigned int ulinevoffset = 0;     /* how far above the bottom of t
 static const int ulineall = 0;                  /* 1 to show underline on all tags, 0 for just the active ones */
 #endif // BAR_UNDERLINETAGS_PATCH
 
+#if NAMETAG_PATCH
+#if NAMETAG_PREPEND_PATCH
+/* The format in which the tag is written when named. E.g. %d: %.12s will write the tag number
+ * followed the first 12 characters of the given string. You can also just use "%d: %s" here. */
+#define NAMETAG_FORMAT "%d: %.12s"
+#else
+#define NAMETAG_FORMAT "%s"
+#endif // NAMETAG_PREPEND_PATCH
+/* The maximum amount of bytes reserved for each tag text. */
+#define MAX_TAGLEN 16
+/* The command to run (via popen). This can be tailored by adding a prompt, passing other command
+ * line arguments or providing name options. Optionally you can use other dmenu like alternatives
+ * like rofi -dmenu. */
+#define NAMETAG_COMMAND "dmenu < /dev/null"
+#endif // NAMETAG_PATCH
+
 /* Indicators: see patch/bar_indicators.h for options */
 static int tagindicatortype              = INDICATOR_TOP_LEFT_SQUARE;
 static int tiledindicatortype            = INDICATOR_NONE;
@@ -411,7 +427,12 @@ static Sp scratchpads[] = {
  * until it an icon matches. Similarly if there are two tag icons then it would alternate between
  * them. This works seamlessly with alternative tags and alttagsdecoration patches.
  */
-static char *tagicons[][NUMTAGS] = {
+#if NAMETAG_PATCH
+static char tagicons[][NUMTAGS][MAX_TAGLEN] =
+#else
+static char *tagicons[][NUMTAGS] =
+#endif // NAMETAG_PATCH
+{
 	[DEFAULT_TAGS]        = { "1", "2", "3", "4", "5", "6", "7", "8", "9" },
 	[ALTERNATIVE_TAGS]    = { "A", "B", "C", "D", "E", "F", "G", "H", "I" },
 	[ALT_TAGS_DECORATION] = { "<1>", "<2>", "<3>", "<4>", "<5>", "<6>", "<7>", "<8>", "<9>" },
@@ -1140,6 +1161,9 @@ static Key keys[] = {
 	#if BAR_ALTERNATIVE_TAGS_PATCH
 	{ MODKEY,                       XK_n,          togglealttag,           {0} },
 	#endif // BAR_ALTERNATIVE_TAGS_PATCH
+	#if NAMETAG_PATCH
+	{ MODKEY|ShiftMask,             XK_n,          nametag,                {0} },
+	#endif // NAMETAG_PATCH
 	#if BAR_TAGGRID_PATCH
 	{ MODKEY|ControlMask,           XK_Up,         switchtag,              { .ui = SWITCHTAG_UP    | SWITCHTAG_VIEW } },
 	{ MODKEY|ControlMask,           XK_Down,       switchtag,              { .ui = SWITCHTAG_DOWN  | SWITCHTAG_VIEW } },
@@ -1410,6 +1434,9 @@ static Signal signals[] = {
 	#if MOVEPLACE_PATCH
 	{ "moveplace",               moveplace },
 	#endif // MOVEPLACE_PATCH
+	#if NAMETAG_PATCH
+	{ "nametag",                 nametag },
+	#endif // NAMETAG_PATCH
 	#if EXRESIZE_PATCH
 	{ "explace",                 explace },
 	{ "togglehorizontalexpand",  togglehorizontalexpand },
@@ -1624,6 +1651,9 @@ static IPCCommand ipccommands[] = {
 	#if MOVERESIZE_PATCH
 	IPCCOMMAND( moveresize, 1, {ARG_TYPE_STR} ),
 	#endif // MOVERESIZE_PATCH
+	#if NAMETAG_PATCH
+	IPCCOMMAND( nametag, 1, {ARG_TYPE_NONE} ),
+	#endif // NAMETAG_PATCH
 	#if RIODRAW_PATCH
 	IPCCOMMAND( rioresize, 1, {ARG_TYPE_NONE} ),
 	#endif // RIODRAW_PATCH

patch/dwmc

@@ -10,6 +10,7 @@ case $# in
 	focusurgent) ;&
 	mirrorlayout) ;&
 	mpdcontrol) ;&
+	nametag) ;&
 	pushdown) ;&
 	pushup) ;&
 	self_restart) ;&

patch/include.c

@@ -193,6 +193,9 @@
 #if MOVESTACK_PATCH
 #include "movestack.c"
 #endif
+#if NAMETAG_PATCH
+#include "nametag.c"
+#endif
 #if NO_MOD_BUTTONS_PATCH
 #include "nomodbuttons.c"
 #endif

patch/include.h

@@ -192,6 +192,9 @@
 #if MOVESTACK_PATCH
 #include "movestack.h"
 #endif
+#if NAMETAG_PATCH
+#include "nametag.h"
+#endif
 #if NO_MOD_BUTTONS_PATCH
 #include "nomodbuttons.h"
 #endif

patch/nametag.c

@@ -0,0 +1,61 @@
+void
+nametag(const Arg *arg)
+{
+	char *p, name[MAX_TAGLEN];
+	FILE *f;
+	int i, group;
+	int tagindex;
+	Monitor *m = selmon;
+	#if BAR_ALTTAGSDECORATION_PATCH
+	Client *c;
+	int occ = 0;
+
+	for (c = m->clients; c; c = c->next)
+		occ |= c->tags == 255 ? 0 : c->tags;
+	#endif // BAR_ALTTAGSDECORATION_PATCH
+
+	errno = 0; // popen(3p) says on failure it "may" set errno
+	if (!(f = popen(NAMETAG_COMMAND, "r"))) {
+		fprintf(stderr, "dwm: popen command failed%s%s\n", errno ? ": " : "", errno ? strerror(errno) : "");
+		return;
+	}
+
+	if (!(p = fgets(name, MAX_TAGLEN, f)) && (i = errno) && ferror(f))
+		fprintf(stderr, "dwm: fgets failed: %s\n", strerror(i));
+
+	pclose(f);
+
+	if (!p)
+		return;
+	if ((p = strchr(name, '\n')))
+		*p = '\0';
+
+	for (i = 0; i < NUMTAGS; i++) {
+		if (m->tagset[m->seltags] & (1 << i)) {
+
+		 	tagindex = i + NUMTAGS * m->num;
+			if (tagindex >= LENGTH(tagicons[DEFAULT_TAGS]))
+				tagindex = tagindex % LENGTH(tagicons[DEFAULT_TAGS]);
+
+			#if BAR_ALTTAGSDECORATION_PATCH
+			if (occ & 1 << i)
+				group = ALT_TAGS_DECORATION;
+			else
+			#endif // BAR_ALTTAGSDECORATION_PATCH
+			#if BAR_ALTERNATIVE_TAGS_PATCH
+			if (m->alttag)
+				group = ALTERNATIVE_TAGS;
+			else
+			#endif // BAR_ALTERNATIVE_TAGS_PATCH
+			group = DEFAULT_TAGS;
+
+			#if NAMETAG_PREPEND_PATCH
+			if (snprintf(tagicons[group][i], MAX_TAGLEN, NAMETAG_FORMAT, i+1, name) < 0)
+				fprintf(stderr, "nametag: if statement to avoid -Wformat-truncation= warnings\n");
+			#else
+			snprintf(tagicons[group][i], MAX_TAGLEN, NAMETAG_FORMAT, name);
+			#endif // NAMETAG_PREPEND_PATCH
+		}
+	}
+	drawbars();
+}

patch/nametag.h

@@ -0,0 +1 @@
+static void nametag(const Arg *arg);

patches.def.h

@@ -782,6 +782,32 @@
  */
 #define MOVESTACK_PATCH 0
 
+/* This patch allows you to change the names of tags during runtime.
+ *
+ * This is a bespoke version implemented specifically in relation to tagicons, which is integrated
+ * into dwm-flexipatch. By default it uses dmenu to retrieve the new name, but this can be
+ * customised via config along with the maximum text length and the format string.
+ *
+ * Special behaviour:
+ *    - if more than one tag is selected then the name change applies to all selected tags
+ *    - if tagicons is configured to have unique tags per monitor then the change only applies
+ *      for the current monitor
+ *    - the name change applies to the tag set that is active for the current tag:
+ *       * if used in combination with BAR_ALTTAGSDECORATION_PATCH and there are clients on the
+ *         given tag then the name change only applies to the ALT_TAGS_DECORATION tag set
+ *       * if used in combination with the BAR_ALTERNATIVE_TAGS_PATCH and alternative tags are
+ *         shown then the name change only applies to the ALTERNATIVE_TAGS tag set
+ *       * if used in combination with both then BAR_ALTTAGSDECORATION_PATCH takes precedence
+ *       * otherwise the name change applies to the DEFAULT_TAGS tag set
+ *
+ * https://dwm.suckless.org/patches/nametag/
+ */
+#define NAMETAG_PATCH 0
+
+/* Variant of the above which prepends the tag number to the given string.
+ * The toggle does nothing on its own and need to be enabled in combination with the above. */
+#define NAMETAG_PREPEND_PATCH 0
+
 /* Adds support for the _NET_CLIENT_LIST_STACKING atom, needed by certain applications like the
  * Zoom video conferencing application.
  * https://github.com/bakkeby/patches/wiki/netclientliststacking/