From 57500f9154a3aa99f38f98d552915b8570b7cfdf Mon Sep 17 00:00:00 2001
From: Miles Alan <m@milesalan.com>
Date: Sat, 25 Jan 2020 22:47:38 -0600
Subject: [PATCH] Add transfer function which transfers tiled client between
 the stack & master. Adjusts the nmaster variable accordingly (e.g. if moving
 to master, nmaster++ and if moving to stack nmaster--).

Default keybinding added to config.def.h is Mod+x
---
 config.def.h |  1 +
 dwm.c        | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/config.def.h b/config.def.h
index 1c0b587..67ec8ae 100644
--- a/config.def.h
+++ b/config.def.h
@@ -70,6 +70,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
+	{ MODKEY,                       XK_x,      transfer,       {0} },
 	{ MODKEY,                       XK_Return, zoom,           {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
 	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
diff --git a/dwm.c b/dwm.c
index 4465af1..ada794b 100644
--- a/dwm.c
+++ b/dwm.c
@@ -213,6 +213,7 @@ static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
+static void transfer(const Arg *arg);
 static void unfocus(Client *c, int setfocus);
 static void unmanage(Client *c, int destroyed);
 static void unmapnotify(XEvent *e);
@@ -2147,3 +2148,36 @@ main(int argc, char *argv[])
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;
 }
+
+void
+transfer(const Arg *arg) {
+	Client *c, *mtail = selmon->clients, *stail = NULL, *insertafter;
+	int transfertostack = 0, i, nmasterclients;
+
+	for (i = 0, c = selmon->clients; c; c = c->next) {
+		if (!ISVISIBLE(c) || c->isfloating) continue;
+		if (selmon->sel == c) { transfertostack = i < selmon->nmaster && selmon->nmaster != 0; }
+		if (i < selmon->nmaster) { nmasterclients++; mtail = c; }
+		stail = c;
+		i++;
+	}
+	if (!selmon->sel || selmon->sel->isfloating || i == 0) {
+		return;
+	} else if (transfertostack) {
+		selmon->nmaster = MIN(i, selmon->nmaster) - 1;
+		insertafter = stail;
+	} else {
+		selmon->nmaster = selmon->nmaster + 1;
+		insertafter = mtail;
+	}
+	if (insertafter != selmon->sel) {
+		detach(selmon->sel);
+		if (selmon->nmaster == 1 && !transfertostack) {
+		 attach(selmon->sel); // Head prepend case
+		} else {
+			selmon->sel->next = insertafter->next;
+			insertafter->next = selmon->sel;
+		}
+	}
+	arrange(selmon);
+}
-- 
2.23.1