From f0f2e5a5d333476b91cdb276187446e4b3c9954c Mon Sep 17 00:00:00 2001
From: Palanix <palanixyt@gmail.com>
Date: Sun, 9 Jul 2023 19:35:19 +0200
Subject: [PATCH] Deck layout

---
 config.def.h |  2 ++
 dwl.c        | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/config.def.h b/config.def.h
index db0babc6f..1ad35b0f7 100644
--- a/config.def.h
+++ b/config.def.h
@@ -33,6 +33,7 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "[D]",      deck },
 };
 
 /* monitors */
@@ -132,6 +133,7 @@ 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|WLR_MODIFIER_SHIFT, XKB_KEY_D,          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 1bfe8cf6f..f7e7fa5c6 100644
--- a/dwl.c
+++ b/dwl.c
@@ -252,6 +252,7 @@ static void createmon(struct wl_listener *listener, void *data);
 static void createnotify(struct wl_listener *listener, void *data);
 static void createpointer(struct wlr_pointer *pointer);
 static void cursorframe(struct wl_listener *listener, void *data);
+static void deck(Monitor *m);
 static void destroydragicon(struct wl_listener *listener, void *data);
 static void destroyidleinhibitor(struct wl_listener *listener, void *data);
 static void destroylayersurfacenotify(struct wl_listener *listener, void *data);
@@ -1033,6 +1034,40 @@ cursorframe(struct wl_listener *listener, void *data)
 	wlr_seat_pointer_notify_frame(seat);
 }
 
+void
+deck(Monitor *m)
+{
+	unsigned int i, n = 0, mw, my;
+	Client *c;
+
+	wl_list_for_each(c, &clients, link)
+		if (VISIBLEON(c, m) && !c->isfloating && !c->isfullscreen)
+			n++;
+	if (n == 0)
+		return;
+
+	if (n > m->nmaster)
+		mw = m->nmaster ? m->w.width * m->mfact : 0;
+	else
+		mw = m->w.width;
+	i = my = 0;
+	wl_list_for_each(c, &clients, link) {
+		if (!VISIBLEON(c, m) || c->isfloating || c->isfullscreen)
+			continue;
+		if (i < m->nmaster) {
+			resize(c, (struct wlr_box){.x = m->w.x, .y = m->w.y + my, .width = mw,
+				.height = (m->w.height - my) / (MIN(n, m->nmaster) - i)}, 0);
+			my += c->geom.height;
+		} else {
+			resize(c, (struct wlr_box){.x = m->w.x + mw, .y = m->w.y,
+				.width = m->w.width - mw, .height = m->w.height}, 0);
+			if (i == m->nmaster)
+				wlr_scene_node_raise_to_top(&c->scene->node);
+		}
+		i++;
+	}
+}
+
 void
 destroydragicon(struct wl_listener *listener, void *data)
 {