From 7b608da8c5b159c9a905fb3be3a5cde34ea3adc7 Mon Sep 17 00:00:00 2001
From: Guido Cella <guidocella91@gmail.com>
Date: Fri, 24 Jul 2020 17:12:41 +0200
Subject: [PATCH] Add zoom

---
 config.def.h |  1 +
 dwl.c        | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/config.def.h b/config.def.h
index 41b652f..e9ced7c 100644
--- a/config.def.h
+++ b/config.def.h
@@ -59,6 +59,7 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_d,          incnmaster,     {.i = -1} },
 	{ MODKEY,                    XKB_KEY_h,          setmfact,       {.f = -0.05} },
 	{ MODKEY,                    XKB_KEY_l,          setmfact,       {.f = +0.05} },
+	{ MODKEY,                    XKB_KEY_Return,     zoom,           {0} },
 	{ MODKEY,                    XKB_KEY_Tab,        view,           {0} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_c,          killclient,     {0} },
 	{ MODKEY,                    XKB_KEY_t,          setlayout,      {.v = &layouts[0]} },
diff --git a/dwl.c b/dwl.c
index e4ab735..b5478a7 100644
--- a/dwl.c
+++ b/dwl.c
@@ -211,6 +211,7 @@ static void unmapnotify(struct wl_listener *listener, void *data);
 static void view(const Arg *arg);
 static Client *xytoclient(double x, double y);
 static Monitor *xytomon(double x, double y);
+static void zoom(const Arg *arg);
 
 /* variables */
 static const char broken[] = "broken";
@@ -1636,6 +1637,35 @@ xytomon(double x, double y)
 	return o ? o->data : NULL;
 }
 
+void
+zoom(const Arg *arg)
+{
+	unsigned int n = 0;
+	Client *c, *sel = selclient();
+
+	if (!sel || !selmon->lt[selmon->sellt]->arrange || sel->isfloating)
+		return;
+
+	wl_list_for_each(c, &clients, link)
+		if (VISIBLEON(c, selmon) && !c->isfloating) {
+			if (++n == 1 && c == sel)
+				sel = NULL;
+			else if (n == 2) {
+				if (!sel)
+					sel = c;
+				break;
+			}
+		}
+
+	if (n == 1)
+		return;
+
+	wl_list_remove(&sel->link);
+	wl_list_insert(&clients, &sel->link);
+	focusclient(sel, NULL, 1);
+	arrange(selmon);
+}
+
 int
 main(int argc, char *argv[])
 {