Adding taglabels patch ref. #199

README.md

@@ -17,6 +17,8 @@ If you are experiencing issues then you may want to check out the [Known Issues]
 
 ### Changelog:
 
+2021-11-23 - Added the taglabels patch
+
 2021-09-08 - Added the alwayscenter patch
 
 2021-07-27 - Added the winicon patch
@@ -703,6 +705,9 @@ If you are experiencing issues then you may want to check out the [Known Issues]
    - [taggrid](https://dwm.suckless.org/patches/taggrid/)
       - adds an option to place tags in rows like in many other window managers
 
+   - [taglabels](https://dwm.suckless.org/patches/taglabels/)
+      - shows tag + class of master client in the tags section of the bar
+
    - [tagmonfixfs](https://github.com/bakkeby/patches/wiki/tagmonfixfs/)
       - allows moving a fullscreen window to another monitor while remaining in fullscreen
 

config.def.h

@@ -91,6 +91,12 @@ static const char buttonbar[]            = "<O>";
 static const unsigned int systrayspacing = 2;   /* systray spacing */
 static const int showsystray             = 1;   /* 0 means no systray */
 #endif // BAR_SYSTRAY_PATCH
+#if BAR_TAGLABELS_PATCH
+static const char ptagf[] = "[%s %s]";          /* format of a tag label */
+static const char etagf[] = "[%s]";             /* format of an empty tag */
+static const int lcaselbl = 0;                  /* 1 means make tag label lowercase */
+#endif // BAR_TAGLABELS_PATCH
+
 /* Indicators: see patch/bar_indicators.h for options */
 static int tagindicatortype              = INDICATOR_TOP_LEFT_SQUARE;
 static int tiledindicatortype            = INDICATOR_NONE;
@@ -480,6 +486,9 @@ static const BarRule barrules[] = {
 	#if BAR_TAGS_PATCH
 	{ -1,        0,     BAR_ALIGN_LEFT,   width_tags,              draw_tags,              click_tags,              "tags" },
 	#endif // BAR_TAGS_PATCH
+	#if BAR_TAGLABELS_PATCH
+	{ -1,        0,     BAR_ALIGN_LEFT,   width_taglabels,         draw_taglabels,         click_taglabels,         "taglabels" },
+	#endif // BAR_TAGLABELS_PATCH
 	#if BAR_TAGGRID_PATCH
 	{ -1,        0,     BAR_ALIGN_LEFT,   width_taggrid,           draw_taggrid,           click_taggrid,           "taggrid" },
 	#endif // BAR_TAGGRID_PATCH

dwm.c

@@ -485,6 +485,9 @@ struct Monitor {
 	#if INSETS_PATCH
 	Inset inset;
 	#endif // INSETS_PATCH
+	#if BAR_TAGLABELS_PATCH
+	char taglabel[NUMTAGS][64];
+	#endif // BAR_TAGLABELS_PATCH
 	#if IPC_PATCH
 	char lastltsymbol[16];
 	TagState tagstate;

patch/bar_taglabels.c

@@ -0,0 +1,87 @@
+int
+width_taglabels(Bar *bar, BarArg *a)
+{
+	int w, i;
+	Client *c;
+	Monitor *m = bar->mon;
+	char *icon;
+	unsigned int occ = 0;
+
+	for (c = m->clients; c; c = c->next)
+		occ |= c->tags == 255 ? 0 : c->tags;
+
+	for (w = 0, i = 0; i < NUMTAGS; i++) {
+		m->taglabel[i][0] = '\0';
+		#if BAR_HIDEVACANTTAGS_PATCH
+		if (!(occ & 1 << i || m->tagset[m->seltags] & 1 << i))
+			continue;
+		#endif // BAR_HIDEVACANTTAGS_PATCH
+		icon = tagicon(m, i);
+		XClassHint ch = { NULL, NULL };
+		for (c = m->clients; c; c = c->next) {
+			if (c->tags & (1 << i)) {
+				XGetClassHint(dpy, c->win, &ch);
+				break;
+			}
+		}
+		if (ch.res_class) {
+			if (lcaselbl)
+				ch.res_class[0] = tolower(ch.res_class[0]);
+			snprintf(m->taglabel[i], 64, ptagf, icon, ch.res_class);
+		} else
+			snprintf(m->taglabel[i], 64, etagf, icon);
+
+		w += TEXTW(m->taglabel[i]);
+	}
+	return w;
+}
+
+int
+draw_taglabels(Bar *bar, BarArg *a)
+{
+	int invert = 0;
+	int w, x = a->x;
+	unsigned int i, occ = 0, urg = 0;
+	Client *c;
+	Monitor *m = bar->mon;
+
+	for (c = m->clients; c; c = c->next)
+		if (c->isurgent)
+			urg |= c->tags;
+
+	for (i = 0; i < NUMTAGS; i++) {
+		/* do not draw vacant tags */
+		if (!m->taglabel[i][0])
+			continue;
+		drw_setscheme(drw, scheme[
+			m->tagset[m->seltags] & 1 << i
+			? SchemeTagsSel
+			: urg & 1 << i
+			? SchemeUrg
+			: SchemeTagsNorm
+		]);
+		w = TEXTW(m->taglabel[i]);
+		drw_text(drw, x, a->y, w, a->h, lrpad / 2, m->taglabel[i], invert, False);
+		drawindicator(m, NULL, occ, x, a->y, w, a->h, i, -1, invert, tagindicatortype);
+		x += w;
+	}
+
+	return 1;
+}
+
+int
+click_taglabels(Bar *bar, Arg *arg, BarArg *a)
+{
+	int i = 0, x = lrpad / 2;
+	Monitor *m = bar->mon;
+
+	do {
+		if (!m->taglabel[i][0])
+			continue;
+		x += TEXTW(m->taglabel[i]);
+	} while (a->x >= x && ++i < NUMTAGS);
+	if (i < NUMTAGS) {
+		arg->ui = 1 << i;
+	}
+	return ClkTagBar;
+}

patch/bar_taglabels.h

@@ -0,0 +1,5 @@
+#include <ctype.h> /* for making tab label lowercase, very tiny standard library */
+
+static int width_taglabels(Bar *bar, BarArg *a);
+static int draw_taglabels(Bar *bar, BarArg *a);
+static int click_taglabels(Bar *bar, Arg *arg, BarArg *a);

patch/include.c

@@ -56,6 +56,9 @@
 #if BAR_TAGS_PATCH
 #include "bar_tags.c"
 #endif
+#if BAR_TAGLABELS_PATCH
+#include "bar_taglabels.c"
+#endif
 #if BAR_TAGGRID_PATCH
 #include "bar_taggrid.c"
 #endif

patch/include.h

@@ -56,6 +56,9 @@
 #if BAR_TAGS_PATCH
 #include "bar_tags.h"
 #endif
+#if BAR_TAGLABELS_PATCH
+#include "bar_taglabels.h"
+#endif
 #if BAR_TAGGRID_PATCH
 #include "bar_taggrid.h"
 #endif

patches.def.h

@@ -152,9 +152,14 @@
  */
 #define BAR_SYSTRAY_PATCH 0
 
-/* Show tag symbols in bar */
+/* Show tag symbols in the bar. */
 #define BAR_TAGS_PATCH 1
 
+/* Show tag symbols + class of master window in the bar.
+ * https://dwm.suckless.org/patches/taglabels/
+ */
+#define BAR_TAGLABELS_PATCH 0
+
 /* This patch adds the window icon next to the window title in the bar.
  *
  * The patch depends on Imlib2 for icon scaling.