From 75012a6ab9cc1b6c319af7f4ae7d682b16a66ce3 Mon Sep 17 00:00:00 2001
From: Miles Alan <m@milesalan.com>
Date: Sun, 26 Apr 2020 16:05:43 -0500
Subject: [PATCH] Add inplacerotate fn to rotate all, master, or stacks clients
 inplace

CW (+2) or CCW (-2) Rotates all windows.
CW (+1) or CCW (-1) Rotates master xor stack windows (depending on focus).

Focus position stays 'in-place' so the area of the screen you are focused
on remains unchanged.
---
 config.def.h |  4 ++++
 dwm.c        | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)

diff --git a/config.def.h b/config.def.h
index 1c0b587..9bcb792 100644
--- a/config.def.h
+++ b/config.def.h
@@ -66,6 +66,10 @@ static Key keys[] = {
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
 	{ MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
 	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
+	{ MODKEY|ShiftMask,             XK_j,      inplacerotate,  {.i = +1} },
+	{ MODKEY|ShiftMask,             XK_k,      inplacerotate,  {.i = -1} },
+	{ MODKEY|ShiftMask,             XK_h,      inplacerotate,  {.i = +2} },
+	{ MODKEY|ShiftMask,             XK_l,      inplacerotate,  {.i = -2} },
 	{ MODKEY,                       XK_i,      incnmaster,     {.i = +1 } },
 	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
diff --git a/dwm.c b/dwm.c
index 4465af1..3930680 100644
--- a/dwm.c
+++ b/dwm.c
@@ -175,6 +175,7 @@ static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 static void grabbuttons(Client *c, int focused);
 static void grabkeys(void);
 static void incnmaster(const Arg *arg);
+static void inplacerotate(const Arg *arg);
 static void keypress(XEvent *e);
 static void killclient(const Arg *arg);
 static void manage(Window w, XWindowAttributes *wa);
@@ -2147,3 +2148,61 @@ main(int argc, char *argv[])
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;
 }
+
+void
+insertclient(Client *item, Client *insertItem, int after) {
+	Client *c;
+	if (item == NULL || insertItem == NULL || item == insertItem) return;
+	detach(insertItem);
+	if (!after && selmon->clients == item) {
+		attach(insertItem);
+		return;
+	}
+	if (after) {
+		c = item;
+	} else {
+		for (c = selmon->clients; c; c = c->next) { if (c->next == item) break; }
+	}
+	insertItem->next = c->next;
+	c->next = insertItem;
+}
+
+void
+inplacerotate(const Arg *arg)
+{
+	if(!selmon->sel || (selmon->sel->isfloating && !arg->f)) return;
+
+	unsigned int selidx = 0, i = 0;
+	Client *c = NULL, *stail = NULL, *mhead = NULL, *mtail = NULL, *shead = NULL;
+
+	// Determine positionings for insertclient
+	for (c = selmon->clients; c; c = c->next) {
+		if (ISVISIBLE(c) && !(c->isfloating)) {
+		if (selmon->sel == c) { selidx = i; }
+		if (i == selmon->nmaster - 1) { mtail = c; }
+		if (i == selmon->nmaster) { shead = c; }
+		if (mhead == NULL) { mhead = c; }
+		stail = c;
+		i++;
+		}
+	}
+
+	// All clients rotate
+	if (arg->i == 2) insertclient(selmon->clients, stail, 0);
+	if (arg->i == -2) insertclient(stail, selmon->clients, 1);
+	// Stack xor master rotate
+	if (arg->i == -1 && selidx >= selmon->nmaster) insertclient(stail, shead, 1);
+	if (arg->i == 1 && selidx >= selmon->nmaster) insertclient(shead, stail, 0);
+	if (arg->i == -1 && selidx < selmon->nmaster)  insertclient(mtail, mhead, 1);
+	if (arg->i == 1 && selidx < selmon->nmaster)  insertclient(mhead, mtail, 0);
+
+	// Restore focus position
+	i = 0;
+	for (c = selmon->clients; c; c = c->next) {
+		if (!ISVISIBLE(c) || (c->isfloating)) continue;
+		if (i == selidx) { focus(c); break; }
+		i++;
+	}
+	arrange(selmon);
+	focus(c);
+}
-- 
2.23.1