From 3867ef5a68e15a4faff377ddbc8371853de4a800 Mon Sep 17 00:00:00 2001
From: aleks <aleks.stier@icloud.com>
Date: Sat, 19 Oct 2019 00:56:21 +0200
Subject: [PATCH] Put master to exact position of zoomed client

The default behaviour when zooming a client is to put the previous
master on top of the client-stack. This patch puts the master to the
exact position of the zoomed client in the stack.
---
 dwm.c | 44 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 40 insertions(+), 4 deletions(-)

diff --git a/dwm.c b/dwm.c
index 4465af1..1719b36 100644
--- a/dwm.c
+++ b/dwm.c
@@ -165,6 +165,7 @@ static void drawbar(Monitor *m);
 static void drawbars(void);
 static void enternotify(XEvent *e);
 static void expose(XEvent *e);
+static Client *findbefore(Client *c);
 static void focus(Client *c);
 static void focusin(XEvent *e);
 static void focusmon(const Arg *arg);
@@ -235,6 +236,7 @@ static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
 
 /* variables */
+static Client *prevzoom = NULL;
 static const char broken[] = "broken";
 static char stext[256];
 static int screen;
@@ -780,6 +782,16 @@ expose(XEvent *e)
 		drawbar(m);
 }
 
+Client *
+findbefore(Client *c)
+{
+	Client *tmp;
+	if (c == selmon->clients)
+		return NULL;
+	for (tmp = selmon->clients; tmp && tmp->next != c; tmp = tmp->next);
+	return tmp;
+}
+
 void
 focus(Client *c)
 {
@@ -2114,14 +2126,38 @@ void
 zoom(const Arg *arg)
 {
 	Client *c = selmon->sel;
+	Client *at = NULL, *cold, *cprevious = NULL;
 
 	if (!selmon->lt[selmon->sellt]->arrange
 	|| (selmon->sel && selmon->sel->isfloating))
 		return;
-	if (c == nexttiled(selmon->clients))
-		if (!c || !(c = nexttiled(c->next)))
-			return;
-	pop(c);
+	if (c == nexttiled(selmon->clients)) {
+		at = findbefore(prevzoom);
+		if (at)
+			cprevious = nexttiled(at->next);
+		if (!cprevious || cprevious != prevzoom) {
+			prevzoom = NULL;
+			if (!c || !(c = nexttiled(c->next)))
+				return;
+		} else
+			c = cprevious;
+	}
+	cold = nexttiled(selmon->clients);
+	if (c != cold && !at)
+		at = findbefore(c);
+	detach(c);
+	attach(c);
+	/* swap windows instead of pushing the previous one down */
+	if (c != cold && at) {
+		prevzoom = cold;
+		if (cold && at != cold) {
+			detach(cold);
+			cold->next = at->next;
+			at->next = cold;
+		}
+	}
+	focus(c);
+	arrange(c->mon);
 }
 
 int
-- 
2.23.0