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From b1ca46930756b59c1ebba0b8c7871b85ff84f62f Mon Sep 17 00:00:00 2001
From: Nikita Ivanov <nikita.vyach.ivanov@gmail.com>
Date: Sat, 8 Feb 2025 16:10:25 +0100
Subject: [PATCH] Add centeredmaster layout
This is a port of centeredmaster patch for dwm:
https://dwm.suckless.org/patches/centeredmaster
centeredmaster centers the nmaster area on screen, using mfact * monitor
width & height, with the stacked windows distributed to the left and
right. It can be selected with [Alt]+[c].
With one and two clients in master respectively this results in:
+------------------------------+ +------------------------------+
|+--------++--------++--------+| |+--------++--------++--------+|
|| || || || || || || ||
|| || || || || || M1 || ||
|| || || || || || || ||
|| S2 || M || S1 || || |+--------+| ||
|| || || || || |+--------+| ||
|| || || || || || || ||
|| || || || || || M2 || ||
|| || || || || || || ||
|+--------++--------++--------+| |+--------++--------++--------+|
+------------------------------+ +------------------------------+
---
config.def.h | 2 ++
dwl.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 65 insertions(+)
diff --git a/config.def.h b/config.def.h
index 22d2171..9a3b0c5 100644
--- a/config.def.h
+++ b/config.def.h
@@ -34,6 +34,7 @@ static const Layout layouts[] = {
{ "[]=", tile },
{ "><>", NULL }, /* no layout function means floating behavior */
{ "[M]", monocle },
+ { "|M|", centeredmaster },
};
/* monitors */
@@ -139,6 +140,7 @@ static const Key keys[] = {
{ MODKEY, XKB_KEY_t, setlayout, {.v = &layouts[0]} },
{ MODKEY, XKB_KEY_f, setlayout, {.v = &layouts[1]} },
{ MODKEY, XKB_KEY_m, setlayout, {.v = &layouts[2]} },
+ { MODKEY, XKB_KEY_c, setlayout, {.v = &layouts[3]} },
{ MODKEY, XKB_KEY_space, setlayout, {0} },
{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space, togglefloating, {0} },
{ MODKEY, XKB_KEY_e, togglefullscreen, {0} },
diff --git a/dwl.c b/dwl.c
index def2562..c2456dd 100644
--- a/dwl.c
+++ b/dwl.c
@@ -251,6 +251,7 @@ static void arrangelayer(Monitor *m, struct wl_list *list,
static void arrangelayers(Monitor *m);
static void axisnotify(struct wl_listener *listener, void *data);
static void buttonpress(struct wl_listener *listener, void *data);
+static void centeredmaster(Monitor *m);
static void chvt(const Arg *arg);
static void checkidleinhibitor(struct wlr_surface *exclude);
static void cleanup(void);
@@ -649,6 +650,68 @@ buttonpress(struct wl_listener *listener, void *data)
event->time_msec, event->button, event->state);
}
+void
+centeredmaster(Monitor *m)
+{
+ int i, n, h, mw, mx, my, oty, ety, tw;
+ Client *c;
+
+ n = 0;
+ wl_list_for_each(c, &clients, link)
+ if (VISIBLEON(c, m) && !c->isfloating && !c->isfullscreen)
+ n++;
+ if (n == 0)
+ return;
+
+ /* initialize areas */
+ mw = m->w.width;
+ mx = 0;
+ my = 0;
+ tw = mw;
+
+ if (n > m->nmaster) {
+ /* go mfact box in the center if more than nmaster clients */
+ mw = m->nmaster ? (int)roundf(m->w.width * m->mfact) : 0;
+ tw = m->w.width - mw;
+
+ if (n - m->nmaster > 1) {
+ /* only one client */
+ mx = (m->w.width - mw) / 2;
+ tw = (m->w.width - mw) / 2;
+ }
+ }
+
+ i = 0;
+ oty = 0;
+ ety = 0;
+ wl_list_for_each(c, &clients, link) {
+ if (!VISIBLEON(c, m) || c->isfloating || c->isfullscreen)
+ continue;
+ if (i < m->nmaster) {
+ /* nmaster clients are stacked vertically, in the center
+ * of the screen */
+ h = (m->w.height - my) / (MIN(n, m->nmaster) - i);
+ resize(c, (struct wlr_box){.x = m->w.x + mx, .y = m->w.y + my, .width = mw,
+ .height = h}, 0);
+ my += c->geom.height;
+ } else {
+ /* stack clients are stacked vertically */
+ if ((i - m->nmaster) % 2) {
+ h = (m->w.height - ety) / ( (1 + n - i) / 2);
+ resize(c, (struct wlr_box){.x = m->w.x, .y = m->w.y + ety, .width = tw,
+ .height = h}, 0);
+ ety += c->geom.height;
+ } else {
+ h = (m->w.height - oty) / ((1 + n - i) / 2);
+ resize(c, (struct wlr_box){.x = m->w.x + mx + mw, .y = m->w.y + oty, .width = tw,
+ .height = h}, 0);
+ oty += c->geom.height;
+ }
+ }
+ i++;
+ }
+}
+
void
chvt(const Arg *arg)
{
--
2.48.1
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