From 778ab761611dd05fbb8841f51eb4184b7ce32c8d Mon Sep 17 00:00:00 2001
From: bakkeby <bakkeby@gmail.com>
Date: Sun, 3 May 2020 15:55:08 +0200
Subject: [PATCH] This variant of the shiftview patch adds left and right
 circular shift through tags, but skips tags where there are no clients.

---
 config.def.h |  2 ++
 dwm.c        | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/config.def.h b/config.def.h
index 1c0b587..ad3a5fd 100644
--- a/config.def.h
+++ b/config.def.h
@@ -72,6 +72,8 @@ static Key keys[] = {
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
 	{ MODKEY,                       XK_Return, zoom,           {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
+	{ MODKEY|ShiftMask,             XK_Tab,       shiftviewclients, { .i = +1 } },
+	{ MODKEY|ShiftMask,             XK_backslash, shiftviewclients, { .i = -1 } },
 	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
diff --git a/dwm.c b/dwm.c
index 4465af1..55d5035 100644
--- a/dwm.c
+++ b/dwm.c
@@ -203,6 +203,7 @@ static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
 static void seturgent(Client *c, int urg);
+static void shiftviewclients(const Arg *arg);
 static void showhide(Client *c);
 static void sigchld(int unused);
 static void spawn(const Arg *arg);
@@ -1610,6 +1611,46 @@ seturgent(Client *c, int urg)
 	XFree(wmh);
 }
 
+void
+shiftviewclients(const Arg *arg)
+{
+	Arg shifted;
+	Client *c;
+	unsigned int tagmask = 0;
+
+	for (c = selmon->clients; c; c = c->next)
+		#if SCRATCHPADS_PATCH
+		if (!(c->tags & SPTAGMASK))
+			tagmask = tagmask | c->tags;
+		#else
+		tagmask = tagmask | c->tags;
+		#endif // SCRATCHPADS_PATCH
+
+	#if SCRATCHPADS_PATCH
+	shifted.ui = selmon->tagset[selmon->seltags] & ~SPTAGMASK;
+	#else
+	shifted.ui = selmon->tagset[selmon->seltags];
+	#endif // SCRATCHPADS_PATCH
+	if (arg->i > 0) // left circular shift
+		do {
+			shifted.ui = (shifted.ui << arg->i)
+			   | (shifted.ui >> (LENGTH(tags) - arg->i));
+			#if SCRATCHPADS_PATCH
+			shifted.ui &= ~SPTAGMASK;
+			#endif // SCRATCHPADS_PATCH
+		} while (tagmask && !(shifted.ui & tagmask));
+	else // right circular shift
+		do {
+			shifted.ui = (shifted.ui >> (- arg->i)
+			   | shifted.ui << (LENGTH(tags) + arg->i));
+			#if SCRATCHPADS_PATCH
+			shifted.ui &= ~SPTAGMASK;
+			#endif // SCRATCHPADS_PATCH
+		} while (tagmask && !(shifted.ui & tagmask));
+
+	view(&shifted);
+}
+
 void
 showhide(Client *c)
 {
-- 
2.17.1