Update gitignore

https://dwm.suckless.org/patches/columns/

.gitignore

@@ -1,2 +1,3 @@
 dwm
 *.o
+compile_commands.json

config.def.h

@@ -46,6 +46,7 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "|||",      col },
 };
 
 /* key definitions */
@@ -81,6 +82,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
+	{ MODKEY,                       XK_c,      setlayout,      {.v = &layouts[3]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },

config.h

@@ -43,7 +43,8 @@ static const int resizehints = 1;    /* 1 means respect size hints in tiled resi
 static const Layout layouts[] = {
 	/* symbol     arrange function */
 	{ "[]=",      tile },    /* first entry is default */
-	{ "><>",      NULL },    /* no layout function means floating behavior */
+    { "|||",      col },
+    { "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
 };
 
@@ -88,6 +89,7 @@ static Key keys[] = {
 	{ MODKEY|ShiftMask,             XK_comma,  tagmon,         {.i = -1 } },
 	{ MODKEY|ShiftMask,             XK_period, tagmon,         {.i = +1 } },
 
+    { MODKEY,                       XK_Escape, spawn,          SHCMD("lock") },
     { MODKEY,                       XK_F1,     spawn,          SHCMD("firefox") },
     { MODKEY,                       XK_F2,     spawn,          SHCMD("nautilus") },
     { MODKEY,                       XK_F3,     spawn,          SHCMD("gedit") },

dwm.c

@@ -49,7 +49,8 @@
 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
-#define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
+#define ISVISIBLEONTAG(C, T)    ((C->tags & T))
+#define ISVISIBLE(C)            ISVISIBLEONTAG(C, C->mon->tagset[C->mon->seltags])
 #define LENGTH(X)               (sizeof X / sizeof X[0])
 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
@@ -172,12 +173,14 @@ static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interac
 static void arrange(Monitor *m);
 static void arrangemon(Monitor *m);
 static void attach(Client *c);
+static void attachaside(Client *c);
 static void attachstack(Client *c);
 static void buttonpress(XEvent *e);
 static void checkotherwm(void);
 static void cleanup(void);
 static void cleanupmon(Monitor *mon);
 static void clientmessage(XEvent *e);
+static void col(Monitor *);
 static void configure(Client *c);
 static void configurenotify(XEvent *e);
 static void configurerequest(XEvent *e);
@@ -210,6 +213,7 @@ static void maprequest(XEvent *e);
 static void monocle(Monitor *m);
 static void motionnotify(XEvent *e);
 static void movemouse(const Arg *arg);
+static Client *nexttagged(Client *c);
 static Client *nexttiled(Client *c);
 static void pop(Client *);
 static void propertynotify(XEvent *e);
@@ -444,6 +448,17 @@ attach(Client *c)
 	c->mon->clients = c;
 }
 
+void
+attachaside(Client *c) {
+	Client *at = nexttagged(c);
+	if(!at) {
+		attach(c);
+		return;
+ 	}
+	c->next = at->next;
+	at->next = c;
+}
+
 void
 attachstack(Client *c)
 {
@@ -1183,7 +1198,7 @@ manage(Window w, XWindowAttributes *wa)
 		c->isfloating = c->oldstate = trans != None || c->isfixed;
 	if (c->isfloating)
 		XRaiseWindow(dpy, c->win);
-	attach(c);
+	attachaside(c);
 	attachstack(c);
 	XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
 		(unsigned char *) &(c->win), 1);
@@ -1319,6 +1334,16 @@ movemouse(const Arg *arg)
 	}
 }
 
+Client *
+nexttagged(Client *c) {
+	Client *walked = c->mon->clients;
+	for(;
+		walked && (walked->isfloating || !ISVISIBLEONTAG(walked, c->tags));
+		walked = walked->next
+	);
+	return walked;
+}
+
 Client *
 nexttiled(Client *c)
 {
@@ -1589,7 +1614,7 @@ sendmon(Client *c, Monitor *m)
 	detachstack(c);
 	c->mon = m;
 	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
-	attach(c);
+	attachaside(c);
 	attachstack(c);
 	focus(NULL);
 	arrange(NULL);
@@ -1897,6 +1922,32 @@ tile(Monitor *m)
 		}
 }
 
+void
+col(Monitor *m) {
+	unsigned int i, n, h, w, x, y,mw;
+	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 * m->mfact : 0;
+        else
+                mw = m->ww;
+	for(i = x = y = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
+		if(i < m->nmaster) {
+			 w = (mw - x) / (MIN(n, m->nmaster)-i);
+                         resize(c, x + m->wx, m->wy, w - (2*c->bw), m->wh - (2*c->bw), False);
+			x += WIDTH(c);
+		}
+		else {
+			h = (m->wh - y) / (n - i);
+			resize(c, x + m->wx, m->wy + y, m->ww - x  - (2*c->bw), h - (2*c->bw), False);
+			y += HEIGHT(c);
+		}
+	}
+}
+
 void
 togglebar(const Arg *arg)
 {
@@ -2121,7 +2172,7 @@ updategeom(void)
 					m->clients = c->next;
 					detachstack(c);
 					c->mon = mons;
-					attach(c);
+					attachaside(c);
 					attachstack(c);
 				}
 				if (m == selmon)