Add gaps

config.def.h

@@ -3,6 +3,11 @@
 /* appearance */
 static const unsigned int borderpx  = 1;        /* border pixel of windows */
 static const unsigned int snap      = 32;       /* snap pixel */
+static const unsigned int gappih    = 10;       /* horiz inner gap between windows */
+static const unsigned int gappiv    = 10;       /* vert inner gap between windows */
+static const unsigned int gappoh    = 10;       /* horiz outer gap between windows and screen edge */
+static const unsigned int gappov    = 10;       /* vert outer gap between windows and screen edge */
+static const int smartgaps          = 0;        /* 1 means no outer gap when there is only one window */
 static const int showbar            = 1;        /* 0 means no bar */
 static const int topbar             = 1;        /* 0 means bottom bar */
 static const char *fonts[]          = { "monospace:size=10" };
@@ -41,8 +46,6 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
-	{ "TTT",      bstack },
-	{ "===",      bstackhoriz },
 };
 
 /* key definitions */
@@ -72,14 +75,28 @@ static Key keys[] = {
 	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
+	{ MODKEY|Mod4Mask,              XK_h,      incrgaps,       {.i = +1 } },
+	{ MODKEY|Mod4Mask,              XK_l,      incrgaps,       {.i = -1 } },
+	{ MODKEY|Mod4Mask|ShiftMask,    XK_h,      incrogaps,      {.i = +1 } },
+	{ MODKEY|Mod4Mask|ShiftMask,    XK_l,      incrogaps,      {.i = -1 } },
+	{ MODKEY|Mod4Mask|ControlMask,  XK_h,      incrigaps,      {.i = +1 } },
+	{ MODKEY|Mod4Mask|ControlMask,  XK_l,      incrigaps,      {.i = -1 } },
+	{ MODKEY|Mod4Mask,              XK_0,      togglegaps,     {0} },
+	{ MODKEY|Mod4Mask|ShiftMask,    XK_0,      defaultgaps,    {0} },
+	{ MODKEY,                       XK_y,      incrihgaps,     {.i = +1 } },
+	{ MODKEY,                       XK_o,      incrihgaps,     {.i = -1 } },
+	{ MODKEY|ControlMask,           XK_y,      incrivgaps,     {.i = +1 } },
+	{ MODKEY|ControlMask,           XK_o,      incrivgaps,     {.i = -1 } },
+	{ MODKEY|Mod4Mask,              XK_y,      incrohgaps,     {.i = +1 } },
+	{ MODKEY|Mod4Mask,              XK_o,      incrohgaps,     {.i = -1 } },
+	{ MODKEY|ShiftMask,             XK_y,      incrovgaps,     {.i = +1 } },
+	{ MODKEY|ShiftMask,             XK_o,      incrovgaps,     {.i = -1 } },
 	{ MODKEY,                       XK_Return, zoom,           {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
 	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
-	{ MODKEY,                       XK_u,      setlayout,      {.v = &layouts[3]} },
-	{ MODKEY,                       XK_o,      setlayout,      {.v = &layouts[4]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },

dwm.c

@@ -119,6 +119,10 @@ struct Monitor {
 	int by;               /* bar geometry */
 	int mx, my, mw, mh;   /* screen size */
 	int wx, wy, ww, wh;   /* window area  */
+	int gappih;           /* horizontal gap between windows */
+	int gappiv;           /* vertical gap between windows */
+	int gappoh;           /* horizontal outer gaps */
+	int gappov;           /* vertical outer gaps */
 	unsigned int seltags;
 	unsigned int sellt;
 	unsigned int tagset[2];
@@ -200,6 +204,16 @@ static void sendmon(Client *c, Monitor *m);
 static void setclientstate(Client *c, long state);
 static void setfocus(Client *c);
 static void setfullscreen(Client *c, int fullscreen);
+static void setgaps(int oh, int ov, int ih, int iv);
+static void incrgaps(const Arg *arg);
+static void incrigaps(const Arg *arg);
+static void incrogaps(const Arg *arg);
+static void incrohgaps(const Arg *arg);
+static void incrovgaps(const Arg *arg);
+static void incrihgaps(const Arg *arg);
+static void incrivgaps(const Arg *arg);
+static void togglegaps(const Arg *arg);
+static void defaultgaps(const Arg *arg);
 static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
@@ -234,8 +248,6 @@ static int xerror(Display *dpy, XErrorEvent *ee);
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
-static void bstack(Monitor *m);
-static void bstackhoriz(Monitor *m);
 
 /* variables */
 static const char broken[] = "broken";
@@ -243,6 +255,7 @@ static char stext[256];
 static int screen;
 static int sw, sh;           /* X display screen geometry width, height */
 static int bh, blw = 0;      /* bar geometry */
+static int enablegaps = 1;   /* enables gaps, used by togglegaps */
 static int lrpad;            /* sum of left and right padding for text */
 static int (*xerrorxlib)(Display *, XErrorEvent *);
 static unsigned int numlockmask = 0;
@@ -641,6 +654,10 @@ createmon(void)
 	m->nmaster = nmaster;
 	m->showbar = showbar;
 	m->topbar = topbar;
+	m->gappih = gappih;
+	m->gappiv = gappiv;
+	m->gappoh = gappoh;
+	m->gappov = gappov;
 	m->lt[0] = &layouts[0];
 	m->lt[1] = &layouts[1 % LENGTH(layouts)];
 	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
@@ -1500,6 +1517,111 @@ setfullscreen(Client *c, int fullscreen)
 	}
 }
 
+void
+setgaps(int oh, int ov, int ih, int iv)
+{
+	if (oh < 0) oh = 0;
+	if (ov < 0) ov = 0;
+	if (ih < 0) ih = 0;
+	if (iv < 0) iv = 0;
+
+	selmon->gappoh = oh;
+	selmon->gappov = ov;
+	selmon->gappih = ih;
+	selmon->gappiv = iv;
+	arrange(selmon);
+}
+
+void
+togglegaps(const Arg *arg)
+{
+	enablegaps = !enablegaps;
+	arrange(selmon);
+}
+
+void
+defaultgaps(const Arg *arg)
+{
+	setgaps(gappoh, gappov, gappih, gappiv);
+}
+
+void
+incrgaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh + arg->i,
+		selmon->gappov + arg->i,
+		selmon->gappih + arg->i,
+		selmon->gappiv + arg->i
+	);
+}
+
+void
+incrigaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh,
+		selmon->gappov,
+		selmon->gappih + arg->i,
+		selmon->gappiv + arg->i
+	);
+}
+
+void
+incrogaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh + arg->i,
+		selmon->gappov + arg->i,
+		selmon->gappih,
+		selmon->gappiv
+	);
+}
+
+void
+incrohgaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh + arg->i,
+		selmon->gappov,
+		selmon->gappih,
+		selmon->gappiv
+	);
+}
+
+void
+incrovgaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh,
+		selmon->gappov + arg->i,
+		selmon->gappih,
+		selmon->gappiv
+	);
+}
+
+void
+incrihgaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh,
+		selmon->gappov,
+		selmon->gappih + arg->i,
+		selmon->gappiv
+	);
+}
+
+void
+incrivgaps(const Arg *arg)
+{
+	setgaps(
+		selmon->gappoh,
+		selmon->gappov,
+		selmon->gappih,
+		selmon->gappiv + arg->i
+	);
+}
+
 void
 setlayout(const Arg *arg)
 {
@@ -1676,28 +1798,32 @@ tagmon(const Arg *arg)
 void
 tile(Monitor *m)
 {
-	unsigned int i, n, h, mw, my, ty;
+	unsigned int i, n, h, r, oe = enablegaps, ie = enablegaps, mw, my, ty;
 	Client *c;
 
 	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
 	if (n == 0)
 		return;
 
+	if (smartgaps == n) {
+		oe = 0; // outer gaps disabled
+	}
+
 	if (n > m->nmaster)
-		mw = m->nmaster ? m->ww * m->mfact : 0;
+		mw = m->nmaster ? (m->ww + m->gappiv*ie) * m->mfact : 0;
 	else
-		mw = m->ww;
+		mw = m->ww - 2*m->gappov*oe + m->gappiv*ie;
-	for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
+	for (i = 0, my = ty = m->gappoh*oe, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
 		if (i < m->nmaster) {
-			h = (m->wh - my) / (MIN(n, m->nmaster) - i);
+			r = MIN(n, m->nmaster) - i;
-			resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
+			h = (m->wh - my - m->gappoh*oe - m->gappih*ie * (r - 1)) / r;
-			if (my + HEIGHT(c) < m->wh)
+			resize(c, m->wx + m->gappov*oe, m->wy + my, mw - (2*c->bw) - m->gappiv*ie, h - (2*c->bw), 0);
-				my += HEIGHT(c);
+			my += HEIGHT(c) + m->gappih*ie;
 		} else {
-			h = (m->wh - ty) / (n - i);
+			r = n - i;
-			resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
+			h = (m->wh - ty - m->gappoh*oe - m->gappih*ie * (r - 1)) / r;
-			if (ty + HEIGHT(c) < m->wh)
+			resize(c, m->wx + mw + m->gappov*oe, m->wy + ty, m->ww - mw - (2*c->bw) - 2*m->gappov*oe, h - (2*c->bw), 0);
-				ty += HEIGHT(c);
+			ty += HEIGHT(c) + m->gappih*ie;
 		}
 }
 
@@ -2152,65 +2278,3 @@ main(int argc, char *argv[])
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;
 }
-
-static void
-bstack(Monitor *m) {
-	int w, h, mh, mx, tx, ty, tw;
-	unsigned int i, n;
-	Client *c;
-
-	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
-	if (n == 0)
-		return;
-	if (n > m->nmaster) {
-		mh = m->nmaster ? m->mfact * m->wh : 0;
-		tw = m->ww / (n - m->nmaster);
-		ty = m->wy + mh;
-	} else {
-		mh = m->wh;
-		tw = m->ww;
-		ty = m->wy;
-	}
-	for (i = mx = 0, tx = m->wx, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
-		if (i < m->nmaster) {
-			w = (m->ww - mx) / (MIN(n, m->nmaster) - i);
-			resize(c, m->wx + mx, m->wy, w - (2 * c->bw), mh - (2 * c->bw), 0);
-			mx += WIDTH(c);
-		} else {
-			h = m->wh - mh;
-			resize(c, tx, ty, tw - (2 * c->bw), h - (2 * c->bw), 0);
-			if (tw != m->ww)
-				tx += WIDTH(c);
-		}
-	}
-}
-
-static void
-bstackhoriz(Monitor *m) {
-	int w, mh, mx, tx, ty, th;
-	unsigned int i, n;
-	Client *c;
-
-	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
-	if (n == 0)
-		return;
-	if (n > m->nmaster) {
-		mh = m->nmaster ? m->mfact * m->wh : 0;
-		th = (m->wh - mh) / (n - m->nmaster);
-		ty = m->wy + mh;
-	} else {
-		th = mh = m->wh;
-		ty = m->wy;
-	}
-	for (i = mx = 0, tx = m->wx, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
-		if (i < m->nmaster) {
-			w = (m->ww - mx) / (MIN(n, m->nmaster) - i);
-			resize(c, m->wx + mx, m->wy, w - (2 * c->bw), mh - (2 * c->bw), 0);
-			mx += WIDTH(c);
-		} else {
-			resize(c, tx, ty, m->ww - (2 * c->bw), th - (2 * c->bw), 0);
-			if (th != m->wh)
-				ty += HEIGHT(c);
-		}
-	}
-}