From fc3bd6f412c6bc21b68b997bd58f27ef5ee003ca Mon Sep 17 00:00:00 2001
From: Malfurious <m@lfurio.us>
Date: Sat, 2 Mar 2024 20:01:00 -0500
Subject: patch: elit

elit is an inversion of the default tiling layout with the following
characteristics:

    - master area is on the right
    - master windows are taken from the bottom of the stack (nmaster of
      them)
    - new clients spawn on the top of the stack and therefore appear at
      the top of the slave stacking area on the left
    - mfact controls the middle division point (motion is consistent
      with default layout)

In effect, elit will keep specific client windows pinned in place on the
right, allowing the use of a dynamic stack on the left.  I've found this
useful to use on a secondary monitor for opening and closing short-lived
terminals without affecting the geometry of a web browser window, which
can reserve the full height of the display.
---
 config.def.h |  2 ++
 dwm.c        | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/config.def.h b/config.def.h
index 63d328a..def5e8b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -51,6 +51,7 @@ static const Layout layouts[] = {
 	{ "[M]",      monocle },
 	{ "|M|",      centeredmaster },
 	{ "||=",      col },
+	{ "=[]",      elit },
 };
 
 /* key definitions */
@@ -100,6 +101,7 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
 	{ MODKEY,                       XK_u,      setlayout,      {.v = &layouts[3]} },
 	{ MODKEY,                       XK_o,      setlayout,      {.v = &layouts[4]} },
+	{ MODKEY,                       XK_e,      setlayout,      {.v = &layouts[5]} },
 	{ MODKEY,                       XK_comma,  focusmon,       {.i = -1 } },
 	{ MODKEY,                       XK_period, focusmon,       {.i = +1 } },
 	{ MODKEY|ShiftMask,             XK_comma,  tagmon,         {.i = -1 } },
diff --git a/dwm.c b/dwm.c
index 1114e78..33f83cf 100644
--- a/dwm.c
+++ b/dwm.c
@@ -168,6 +168,7 @@ static void detachstack(Client *c);
 static Monitor *dirtomon(int dir);
 static void drawbar(Monitor *m);
 static void drawbars(void);
+static void elit(Monitor *m);
 static void enternotify(XEvent *e);
 static void expose(XEvent *e);
 static void focus(Client *c);
@@ -834,6 +835,39 @@ drawbars(void)
 		drawbar(m);
 }
 
+void
+elit(Monitor *m)
+{
+	unsigned int i, n, h, mw, my, ty, nslave;
+	Client *c;
+
+	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
+	if (n == 0)
+		return;
+
+	if (n > m->nmaster) {
+		mw = m->nmaster ? m->ww * (1 - m->mfact) : 0;
+		nslave = n - m->nmaster;
+	} else {
+		mw = m->ww;
+		nslave = 0;
+	}
+
+	for (i = ty = my = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
+		if (i < nslave) {
+			h = (m->wh - ty) / (nslave - i);
+			resize(c, m->wx, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
+			if (ty + HEIGHT(c) < m->wh)
+				ty += HEIGHT(c);
+		} else {
+			h = (m->wh - my) / (n - i);
+			resize(c, m->wx + (m->ww - mw), m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
+			if (my + HEIGHT(c) < m->wh)
+				my += HEIGHT(c);
+		}
+	}
+}
+
 void
 enternotify(XEvent *e)
 {
-- 
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