From 788731079849b41c6e0cb2c4baa2665aa3bc74c0 Mon Sep 17 00:00:00 2001
From: gonzo <gonzo@toniatuh.com>
Date: Wed, 17 May 2023 20:43:21 +0200
Subject: cycle layouts

---
 config.h |  5 ++++-
 dwm.1    |  9 ++++++---
 dwm.c    | 18 ++++++++++++++++++
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/config.h b/config.h
index bc1c11f..d3e5175 100644
--- a/config.h
+++ b/config.h
@@ -59,6 +59,7 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ NULL,       NULL },
 };
 
 /* key definitions */
@@ -92,7 +93,9 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
 	{ MODKEY|ShiftMask,             XK_Return, zoom,           {0} },
-	{ MODKEY,                       XK_Tab,    view,           {0} },
+	//{ MODKEY,                       XK_Tab,    view,           {0} },
+	{ MODKEY,                       XK_Tab,    cyclelayout,    {.i = +1 } },
+	{ MODKEY|ShiftMask,             XK_Tab,    cyclelayout,    {.i = -1 } },
 	{ MODKEY|ShiftMask,             XK_q,      killclient,     {0} },
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      togglefullscr,  {0} },
diff --git a/dwm.1 b/dwm.1
index bc5a7e5..21469ba 100644
--- a/dwm.1
+++ b/dwm.1
@@ -95,6 +95,12 @@ Sets monocle layout.
 .B Mod1\-space
 Toggles between current and previous layout.
 .TP
+.B Mod1\-Shift\-Tab
+Cycles backwards in layout list.
+.TP
+.B Mod1\-Tab
+Cycles forwards in layout list.
+.TP
 .B Mod1\-j
 Focus next window.
 .TP
@@ -125,9 +131,6 @@ Toggle fullscreen for focused window.
 .B Mod1\-Shift\-space
 Toggle focused window between tiled and floating state.
 .TP
-.B Mod1\-Tab
-Toggles to the previously selected tags.
-.TP
 .B Mod1\-Shift\-[1..n]
 Apply nth tag to focused window.
 .TP
diff --git a/dwm.c b/dwm.c
index 5dcb278..1db2f5e 100644
--- a/dwm.c
+++ b/dwm.c
@@ -160,6 +160,7 @@ static void configure(Client *c);
 static void configurenotify(XEvent *e);
 static void configurerequest(XEvent *e);
 static Monitor *createmon(void);
+static void cyclelayout(const Arg *arg);
 static void destroynotify(XEvent *e);
 static void detach(Client *c);
 static void detachstack(Client *c);
@@ -671,6 +672,23 @@ createmon(void)
 	return m;
 }
 
+void
+cyclelayout(const Arg *arg) {
+	Layout *l;
+	for(l = (Layout *)layouts; l != selmon->lt[selmon->sellt]; l++);
+	if(arg->i > 0) {
+		if(l->symbol && (l + 1)->symbol)
+			setlayout(&((Arg) { .v = (l + 1) }));
+		else
+			setlayout(&((Arg) { .v = layouts }));
+	} else {
+		if(l != layouts && (l - 1)->symbol)
+			setlayout(&((Arg) { .v = (l - 1) }));
+		else
+			setlayout(&((Arg) { .v = &layouts[LENGTH(layouts) - 2] }));
+	}
+}
+
 void
 destroynotify(XEvent *e)
 {
-- 
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