From 9513cc776dc8114967988d4abc32fd7f37446ddb Mon Sep 17 00:00:00 2001
From: fossy <fossy@dnmx.org>
Date: Sun, 28 Nov 2021 21:34:37 +0100
Subject: [PATCH] Move function and it's prototype from config.def.h to dwm.c

---
 config.def.h |  3 ++-
 dwm.c        | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/config.def.h b/config.def.h
index a2ac963..f31a66d 100644
--- a/config.def.h
+++ b/config.def.h
@@ -50,7 +50,8 @@ static const Layout layouts[] = {
 	{ MODKEY,                       KEY,      view,           {.ui = 1 << TAG} }, \
 	{ MODKEY|ControlMask,           KEY,      toggleview,     {.ui = 1 << TAG} }, \
 	{ MODKEY|ShiftMask,             KEY,      tag,            {.ui = 1 << TAG} }, \
-	{ MODKEY|ControlMask|ShiftMask, KEY,      toggletag,      {.ui = 1 << TAG} },
+	{ MODKEY|ControlMask|ShiftMask, KEY,      toggletag,      {.ui = 1 << TAG} }, \
+  { Mod4Mask|ShiftMask,           KEY,      swaptags,       {.ui = 1 << TAG} },
 
 /* helper for spawning shell commands in the pre dwm-5.0 fashion */
 #define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } }
diff --git a/dwm.c b/dwm.c
index 5e4d494..d11addd 100644
--- a/dwm.c
+++ b/dwm.c
@@ -234,6 +234,7 @@ static int xerror(Display *dpy, XErrorEvent *ee);
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
+static void swaptags(const Arg *arg);
 
 /* variables */
 static const char broken[] = "broken";
@@ -2127,6 +2128,28 @@ zoom(const Arg *arg)
 	pop(c);
 }
 
+void
+swaptags(const Arg *arg)
+{
+	unsigned int newtag = arg->ui & TAGMASK;
+	unsigned int curtag = selmon->tagset[selmon->seltags];
+
+	if (newtag == curtag || !curtag || (curtag & (curtag-1)))
+		return;
+
+	for (Client *c = selmon->clients; c != NULL; c = c->next) {
+		if((c->tags & newtag) || (c->tags & curtag))
+			c->tags ^= curtag ^ newtag;
+
+		if(!c->tags) c->tags = newtag;
+	}
+
+	selmon->tagset[selmon->seltags] = newtag;
+
+	focus(NULL);
+	arrange(selmon);
+}
+
 int
 main(int argc, char *argv[])
 {
-- 
2.34.1