new patches

config.def.h

@@ -36,6 +36,12 @@ static const Rule rules[] = {
 	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           -1 },
 };
 
+static const MonitorRule monrules[] = {
+	/* monitor layout  mfact  nmaster  showbar  topbar */
+	{  1,      2,      -1,    -1,      -1,      -1     }, // use a different layout for the second monitor
+	{  -1,     0,      -1,    -1,      -1,      -1     }, // default
+};
+
 /* layout(s) */
 static const float mfact     = 0.55; /* factor of master area size [0.05..0.95] */
 static const int nmaster     = 1;    /* number of clients in master area */

dwm.c

@@ -143,6 +143,15 @@ typedef struct {
 	int monitor;
 } Rule;
 
+typedef struct {
+	int monitor;
+	int layout;
+	float mfact;
+	int nmaster;
+	int showbar;
+	int topbar;
+} MonitorRule;
+
 /* function declarations */
 static void applyrules(Client *c);
 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
@@ -664,8 +673,10 @@ configurerequest(XEvent *e)
 Monitor *
 createmon(void)
 {
-	Monitor *m;
+	Monitor *m, *mon;
 	unsigned int i;
+  unsigned int mi, j;
+  const MonitorRule *mr;
 
 	m = ecalloc(1, sizeof(Monitor));
 	m->tagset[0] = m->tagset[1] = 1;
@@ -673,9 +684,27 @@ createmon(void)
 	m->nmaster = nmaster;
 	m->showbar = showbar;
 	m->topbar = topbar;
-	m->lt[0] = &layouts[0];
-	m->lt[1] = &layouts[1 % LENGTH(layouts)];
-	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
+
+  for (mi = 0, mon = mons; mon; mon = mon->next, mi++);
+  for (j = 0; j < LENGTH(monrules); j++) {
+    mr = &monrules[j];
+    if ((mr->monitor == -1 || mr->monitor == mi)) {
+      m->lt[0] = &layouts[mr->layout];
+      m->lt[1] = &layouts[1 % LENGTH(layouts)];
+      strncpy(m->ltsymbol, layouts[mr->layout].symbol, sizeof m->ltsymbol);
+
+      if (mr->mfact > -1)
+        m->mfact = mr->mfact;
+      if (mr->nmaster > -1)
+        m->nmaster = mr->nmaster;
+      if (mr->showbar > -1)
+        m->showbar = mr->showbar;
+      if (mr->topbar > -1)
+        m->topbar = mr->topbar;
+      break;
+    }
+  }
+
 	m->pertag = ecalloc(1, sizeof(Pertag));
 	m->pertag->curtag = m->pertag->prevtag = 1;
 
@@ -1143,6 +1172,8 @@ manage(Window w, XWindowAttributes *wa)
 	updatewindowtype(c);
 	updatesizehints(c);
 	updatewmhints(c);
+	c->x = c->mon->mx + (c->mon->mw - WIDTH(c)) / 2;
+	c->y = c->mon->my + (c->mon->mh - HEIGHT(c)) / 2;
 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
 	grabbuttons(c, 0);
 	if (!c->isfloating)

patches/dwm-alwayscenter-20200625-f04cac6.diff

@@ -0,0 +1,12 @@
+diff -up dwm/dwm.c dwmmod/dwm.c
+--- dwm/dwm.c	2020-06-25 00:21:30.383692180 -0300
++++ dwmmod/dwm.c	2020-06-25 00:20:35.643692330 -0300
+@@ -1057,6 +1057,8 @@ manage(Window w, XWindowAttributes *wa)
+ 	updatewindowtype(c);
+ 	updatesizehints(c);
+ 	updatewmhints(c);
++	c->x = c->mon->mx + (c->mon->mw - WIDTH(c)) / 2;
++	c->y = c->mon->my + (c->mon->mh - HEIGHT(c)) / 2;
+ 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
+ 	grabbuttons(c, 0);
+ 	if (!c->isfloating)

patches/dwm-monitorrules-6.2.diff

@@ -0,0 +1,95 @@
+From 4bd473cd0894e26b24294d41b70165e608b61de7 Mon Sep 17 00:00:00 2001
+From: bakkeby <bakkeby@gmail.com>
+Date: Sun, 26 Apr 2020 10:49:08 +0200
+Subject: [PATCH] Monitor rules patch
+
+This patch allows the user to define layout, mfact, nmaster, showbar,
+and topbar settings on a per monitor basis. An example use case could
+be to have a layout with a horizontal split for a secondary vertical
+monitor.
+---
+ config.def.h |  6 ++++++
+ dwm.c        | 36 ++++++++++++++++++++++++++++++++----
+ 2 files changed, 38 insertions(+), 4 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 1c0b587..b81f377 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -31,6 +31,12 @@ static const Rule rules[] = {
+ 	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           -1 },
+ };
+ 
++static const MonitorRule monrules[] = {
++	/* monitor layout  mfact  nmaster  showbar  topbar */
++	{  1,      2,      -1,    -1,      -1,      -1     }, // use a different layout for the second monitor
++	{  -1,     0,      -1,    -1,      -1,      -1     }, // default
++};
++
+ /* layout(s) */
+ static const float mfact     = 0.55; /* factor of master area size [0.05..0.95] */
+ static const int nmaster     = 1;    /* number of clients in master area */
+diff --git a/dwm.c b/dwm.c
+index 4465af1..0ad5375 100644
+--- a/dwm.c
++++ b/dwm.c
+@@ -141,6 +141,15 @@ typedef struct {
+ 	int monitor;
+ } Rule;
+ 
++typedef struct {
++	int monitor;
++	int layout;
++	float mfact;
++	int nmaster;
++	int showbar;
++	int topbar;
++} MonitorRule;
++
+ /* function declarations */
+ static void applyrules(Client *c);
+ static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
+@@ -630,7 +639,9 @@ configurerequest(XEvent *e)
+ Monitor *
+ createmon(void)
+ {
+-	Monitor *m;
++	Monitor *m, *mon;
++	unsigned int mi, j;
++	const MonitorRule *mr;
+ 
+ 	m = ecalloc(1, sizeof(Monitor));
+ 	m->tagset[0] = m->tagset[1] = 1;
+@@ -638,9 +649,26 @@ createmon(void)
+ 	m->nmaster = nmaster;
+ 	m->showbar = showbar;
+ 	m->topbar = topbar;
+-	m->lt[0] = &layouts[0];
+-	m->lt[1] = &layouts[1 % LENGTH(layouts)];
+-	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
++
++	for (mi = 0, mon = mons; mon; mon = mon->next, mi++);
++	for (j = 0; j < LENGTH(monrules); j++) {
++		mr = &monrules[j];
++		if ((mr->monitor == -1 || mr->monitor == mi)) {
++			m->lt[0] = &layouts[mr->layout];
++			m->lt[1] = &layouts[1 % LENGTH(layouts)];
++			strncpy(m->ltsymbol, layouts[mr->layout].symbol, sizeof m->ltsymbol);
++
++			if (mr->mfact > -1)
++				m->mfact = mr->mfact;
++			if (mr->nmaster > -1)
++				m->nmaster = mr->nmaster;
++			if (mr->showbar > -1)
++				m->showbar = mr->showbar;
++			if (mr->topbar > -1)
++				m->topbar = mr->topbar;
++			break;
++		}
++	}
+ 	return m;
+ }
+ 
+-- 
+2.19.1
+