stacker updated for version 6.6

Because drw_scm_create() allocates it.

Makefile

@@ -6,13 +6,7 @@ include config.mk
 SRC = drw.c dwm.c util.c
 OBJ = ${SRC:.c=.o}
 
-all: options dwm
+all: dwm
-
-options:
-	@echo dwm build options:
-	@echo "CFLAGS   = ${CFLAGS}"
-	@echo "LDFLAGS  = ${LDFLAGS}"
-	@echo "CC       = ${CC}"
 
 .c.o:
 	${CC} -c ${CFLAGS} $<
@@ -48,4 +42,4 @@ uninstall:
 	rm -f ${DESTDIR}${PREFIX}/bin/dwm\
 		${DESTDIR}${MANPREFIX}/man1/dwm.1
 
-.PHONY: all options clean dist install uninstall
+.PHONY: all clean dist install uninstall

README

@@ -1,48 +0,0 @@
-dwm - dynamic window manager
-============================
-dwm is an extremely fast, small, and dynamic window manager for X.
-
-
-Requirements
-------------
-In order to build dwm you need the Xlib header files.
-
-
-Installation
-------------
-Edit config.mk to match your local setup (dwm is installed into
-the /usr/local namespace by default).
-
-Afterwards enter the following command to build and install dwm (if
-necessary as root):
-
-    make clean install
-
-
-Running dwm
------------
-Add the following line to your .xinitrc to start dwm using startx:
-
-    exec dwm
-
-In order to connect dwm to a specific display, make sure that
-the DISPLAY environment variable is set correctly, e.g.:
-
-    DISPLAY=foo.bar:1 exec dwm
-
-(This will start dwm on display :1 of the host foo.bar.)
-
-In order to display status info in the bar, you can do something
-like this in your .xinitrc:
-
-    while xsetroot -name "`date` `uptime | sed 's/.*,//'`"
-    do
-    	sleep 1
-    done &
-    exec dwm
-
-
-Configuration
--------------
-The configuration of dwm is done by creating a custom config.h
-and (re)compiling the source code.

README.md

@@ -0,0 +1,14 @@
+# dwm - dynamic window manager
+
+This is my fork of suckless's dwm, for my customizations/configurations.
+
+**Upstream:** `https://git.suckless.org/dwm/` or `git://git.suckless.org/dwm`
+
+## TODO
+
+- patches to add:
+    - fibonacci (for spiral layout)
+    - stacker (for moving windows up and down stack)
+    - swallow (the replace-windows-in-place feature)
+    - xresources (maybe? for my theme-changing logic)
+

config.def.h

@@ -18,6 +18,9 @@ static const char *colors[][3]      = {
 	[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
 };
 
+/* window replacement/swapping */
+static const int swallowfloating    = 0; /* 1 means swallow floating windows by default */
+
 /* tagging */
 static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 
@@ -26,9 +29,11 @@ static const Rule rules[] = {
 	 *	WM_CLASS(STRING) = instance, class
 	 *	WM_NAME(STRING) = title
 	 */
-	/* class      instance    title       tags mask     isfloating   monitor */
+	/* class     instance  title           tags mask  isfloating  isterminal  noswallow  monitor */
-	{ "Gimp",     NULL,       NULL,       0,            1,           -1 },
+	{ "Gimp",    NULL,     NULL,           0,         1,          0,           0,        -1 },
-	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           -1 },
+	{ "Firefox", NULL,     NULL,           1 << 8,    0,          0,          -1,        -1 },
+	{ "St",      NULL,     NULL,           0,         0,          1,           0,        -1 },
+	{ NULL,      NULL,     "Event Tester", 0,         0,          0,           1,        -1 }, /* xev */
 };
 
 /* layout(s) */
@@ -36,12 +41,16 @@ static const float mfact     = 0.55; /* factor of master area size [0.05..0.95]
 static const int nmaster     = 1;    /* number of clients in master area */
 static const int resizehints = 1;    /* 1 means respect size hints in tiled resizals */
 static const int lockfullscreen = 1; /* 1 will force focus on the fullscreen window */
+static const int refreshrate = 120;  /* refresh rate (per second) for client move/resize */
 
+#include "fibonacci.c"
 static const Layout layouts[] = {
 	/* symbol     arrange function */
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "[@]",      spiral },
+	{ "[\\]",      dwindle },
 };
 
 /* key definitions */
@@ -51,12 +60,21 @@ static const Layout layouts[] = {
 	{ MODKEY|ControlMask,           KEY,      toggleview,     {.ui = 1 << TAG} }, \
 	{ MODKEY|ShiftMask,             KEY,      tag,            {.ui = 1 << TAG} }, \
 	{ MODKEY|ControlMask|ShiftMask, KEY,      toggletag,      {.ui = 1 << TAG} },
+#define STACKKEYS(MOD,ACTION) \
+	{ MOD, XK_j,     ACTION##stack, {.i = INC(+1) } }, \
+	{ MOD, XK_k,     ACTION##stack, {.i = INC(-1) } }, \
+	{ MOD, XK_grave, ACTION##stack, {.i = PREVSEL } }, \
+	{ MOD, XK_q,     ACTION##stack, {.i = 0 } }, \
+	{ MOD, XK_a,     ACTION##stack, {.i = 1 } }, \
+	{ MOD, XK_z,     ACTION##stack, {.i = 2 } }, \
+	{ MOD, XK_x,     ACTION##stack, {.i = -1 } },
 
 /* helper for spawning shell commands in the pre dwm-5.0 fashion */
 #define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } }
 
 /* commands */
-static const char *dmenucmd[] = { "dmenu_run", "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
+static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn() */
+static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
 static const char *termcmd[]  = { "st", NULL };
 
 static const Key keys[] = {
@@ -64,8 +82,8 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
 	{ MODKEY|ShiftMask,             XK_Return, spawn,          {.v = termcmd } },
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
-	{ MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
+	STACKKEYS(MODKEY,                          focus)
-	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
+	STACKKEYS(MODKEY|ShiftMask,                push)
 	{ MODKEY,                       XK_i,      incnmaster,     {.i = +1 } },
 	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
@@ -76,6 +94,8 @@ static const 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_r,      setlayout,      {.v = &layouts[3]} },
+	{ MODKEY|ShiftMask,             XK_r,      setlayout,      {.v = &layouts[4]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
@@ -93,7 +113,7 @@ static const Key keys[] = {
 	TAGKEYS(                        XK_7,                      6)
 	TAGKEYS(                        XK_8,                      7)
 	TAGKEYS(                        XK_9,                      8)
-	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
+	{ MODKEY|ShiftMask,             XK_BackSpace, quit,        {0} },
 };
 
 /* button definitions */

config.mk

@@ -1,5 +1,5 @@
 # dwm version
-VERSION = 6.4
+VERSION = 6.6
 
 # Customize below to fit your system
 
@@ -20,13 +20,14 @@ FREETYPEINC = /usr/include/freetype2
 # OpenBSD (uncomment)
 #FREETYPEINC = ${X11INC}/freetype2
 #MANPREFIX = ${PREFIX}/man
+#KVMLIB = -lkvm
 
 # includes and libs
 INCS = -I${X11INC} -I${FREETYPEINC}
-LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS}
+LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lX11-xcb -lxcb -lxcb-res ${KVMLIB}
 
 # flags
-CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
 #CFLAGS   = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
 CFLAGS   = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS}
 LDFLAGS  = ${LIBS}

drw.c

@@ -9,54 +9,40 @@
 #include "util.h"
 
 #define UTF_INVALID 0xFFFD
-#define UTF_SIZ     4
 
-static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static int
-static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+utf8decode(const char *s_in, long *u, int *err)
-static const long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
-static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
-
-static long
-utf8decodebyte(const char c, size_t *i)
 {
-	for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
+	static const unsigned char lens[] = {
-		if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
+		/* 0XXXX */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-			return (unsigned char)c & ~utfmask[*i];
+		/* 10XXX */ 0, 0, 0, 0, 0, 0, 0, 0,  /* invalid */
-	return 0;
+		/* 110XX */ 2, 2, 2, 2,
-}
+		/* 1110X */ 3, 3,
-
+		/* 11110 */ 4,
-static size_t
+		/* 11111 */ 0,  /* invalid */
-utf8validate(long *u, size_t i)
+	};
-{
+	static const unsigned char leading_mask[] = { 0x7F, 0x1F, 0x0F, 0x07 };
-	if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+	static const unsigned int overlong[] = { 0x0, 0x80, 0x0800, 0x10000 };
-		*u = UTF_INVALID;
-	for (i = 1; *u > utfmax[i]; ++i)
-		;
-	return i;
-}
-
-static size_t
-utf8decode(const char *c, long *u, size_t clen)
-{
-	size_t i, j, len, type;
-	long udecoded;
 
+	const unsigned char *s = (const unsigned char *)s_in;
+	int len = lens[*s >> 3];
 	*u = UTF_INVALID;
-	if (!clen)
+	*err = 1;
-		return 0;
+	if (len == 0)
-	udecoded = utf8decodebyte(c[0], &len);
-	if (!BETWEEN(len, 1, UTF_SIZ))
 		return 1;
-	for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
-		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
-		if (type)
-			return j;
-	}
-	if (j < len)
-		return 0;
-	*u = udecoded;
-	utf8validate(u, len);
 
+	long cp = s[0] & leading_mask[len - 1];
+	for (int i = 1; i < len; ++i) {
+		if (s[i] == '\0' || (s[i] & 0xC0) != 0x80)
+			return i;
+		cp = (cp << 6) | (s[i] & 0x3F);
+	}
+	/* out of range, surrogate, overlong encoding */
+	if (cp > 0x10FFFF || (cp >> 11) == 0x1B || cp < overlong[len - 1])
+		return len;
+
+	*err = 0;
+	*u = cp;
 	return len;
 }
 
@@ -192,8 +178,7 @@ drw_clr_create(Drw *drw, Clr *dest, const char *clrname)
 		die("error, cannot allocate color '%s'", clrname);
 }
 
-/* Wrapper to create color schemes. The caller has to call free(3) on the
+/* Create color schemes. */
- * returned color scheme when done using it. */
 Clr *
 drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
 {
@@ -201,7 +186,7 @@ drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
 	Clr *ret;
 
 	/* need at least two colors for a scheme */
-	if (!drw || !clrnames || clrcount < 2 || !(ret = ecalloc(clrcount, sizeof(XftColor))))
+	if (!drw || !clrnames || clrcount < 2 || !(ret = ecalloc(clrcount, sizeof(Clr))))
 		return NULL;
 
 	for (i = 0; i < clrcount; i++)
@@ -209,6 +194,30 @@ drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
 	return ret;
 }
 
+void
+drw_clr_free(Drw *drw, Clr *c)
+{
+	if (!drw || !c)
+		return;
+
+	/* c is typedef XftColor Clr */
+	XftColorFree(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
+	             DefaultColormap(drw->dpy, drw->screen), c);
+}
+
+void
+drw_scm_free(Drw *drw, Clr *scm, size_t clrcount)
+{
+	size_t i;
+
+	if (!drw || !scm)
+		return;
+
+	for (i = 0; i < clrcount; i++)
+		drw_clr_free(drw, &scm[i]);
+	free(scm);
+}
+
 void
 drw_setfontset(Drw *drw, Fnt *set)
 {
@@ -238,11 +247,11 @@ drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int
 int
 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert)
 {
-	int i, ty, ellipsis_x = 0;
+	int ty, ellipsis_x = 0;
-	unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len;
+	unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len, hash, h0, h1;
 	XftDraw *d = NULL;
 	Fnt *usedfont, *curfont, *nextfont;
-	int utf8strlen, utf8charlen, render = x || y || w || h;
+	int utf8strlen, utf8charlen, utf8err, render = x || y || w || h;
 	long utf8codepoint = 0;
 	const char *utf8str;
 	FcCharSet *fccharset;
@@ -251,9 +260,8 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 	XftResult result;
 	int charexists = 0, overflow = 0;
 	/* keep track of a couple codepoints for which we have no match. */
-	enum { nomatches_len = 64 };
+	static unsigned int nomatches[128], ellipsis_width, invalid_width;
-	static struct { long codepoint[nomatches_len]; unsigned int idx; } nomatches;
+	static const char invalid[] = "<EFBFBD>";
-	static unsigned int ellipsis_width = 0;
 
 	if (!drw || (render && (!drw->scheme || !w)) || !text || !drw->fonts)
 		return 0;
@@ -263,6 +271,8 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 	} else {
 		XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);
 		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
+		if (w < lpad)
+			return x + w;
 		d = XftDrawCreate(drw->dpy, drw->drawable,
 		                  DefaultVisual(drw->dpy, drw->screen),
 		                  DefaultColormap(drw->dpy, drw->screen));
@@ -273,12 +283,14 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 	usedfont = drw->fonts;
 	if (!ellipsis_width && render)
 		ellipsis_width = drw_fontset_getwidth(drw, "...");
+	if (!invalid_width && render)
+		invalid_width = drw_fontset_getwidth(drw, invalid);
 	while (1) {
-		ew = ellipsis_len = utf8strlen = 0;
+		ew = ellipsis_len = utf8err = utf8charlen = utf8strlen = 0;
 		utf8str = text;
 		nextfont = NULL;
 		while (*text) {
-			utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
+			utf8charlen = utf8decode(text, &utf8codepoint, &utf8err);
 			for (curfont = drw->fonts; curfont; curfont = curfont->next) {
 				charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
 				if (charexists) {
@@ -300,9 +312,9 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 						else
 							utf8strlen = ellipsis_len;
 					} else if (curfont == usedfont) {
-						utf8strlen += utf8charlen;
 						text += utf8charlen;
-						ew += tmpw;
+						utf8strlen += utf8err ? 0 : utf8charlen;
+						ew += utf8err ? 0 : tmpw;
 					} else {
 						nextfont = curfont;
 					}
@@ -310,7 +322,7 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 				}
 			}
 
-			if (overflow || !charexists || nextfont)
+			if (overflow || !charexists || nextfont || utf8err)
 				break;
 			else
 				charexists = 0;
@@ -325,6 +337,12 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 			x += ew;
 			w -= ew;
 		}
+		if (utf8err && (!render || invalid_width < w)) {
+			if (render)
+				drw_text(drw, x, y, w, h, 0, invalid, invert);
+			x += invalid_width;
+			w -= invalid_width;
+		}
 		if (render && overflow)
 			drw_text(drw, ellipsis_x, y, ellipsis_w, h, 0, "...", invert);
 
@@ -338,11 +356,14 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 			 * character must be drawn. */
 			charexists = 1;
 
-			for (i = 0; i < nomatches_len; ++i) {
+			hash = (unsigned int)utf8codepoint;
-				/* avoid calling XftFontMatch if we know we won't find a match */
+			hash = ((hash >> 16) ^ hash) * 0x21F0AAAD;
-				if (utf8codepoint == nomatches.codepoint[i])
+			hash = ((hash >> 15) ^ hash) * 0xD35A2D97;
-					goto no_match;
+			h0 = ((hash >> 15) ^ hash) % LENGTH(nomatches);
-			}
+			h1 = (hash >> 17) % LENGTH(nomatches);
+			/* avoid expensive XftFontMatch call when we know we won't find a match */
+			if (nomatches[h0] == utf8codepoint || nomatches[h1] == utf8codepoint)
+				goto no_match;
 
 			fccharset = FcCharSetCreate();
 			FcCharSetAddChar(fccharset, utf8codepoint);
@@ -371,7 +392,7 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 					curfont->next = usedfont;
 				} else {
 					xfont_free(usedfont);
-					nomatches.codepoint[++nomatches.idx % nomatches_len] = utf8codepoint;
+					nomatches[nomatches[h0] ? h1 : h0] = utf8codepoint;
 no_match:
 					usedfont = drw->fonts;
 				}

drw.h

@@ -40,7 +40,9 @@ void drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned in
 
 /* Colorscheme abstraction */
 void drw_clr_create(Drw *drw, Clr *dest, const char *clrname);
+void drw_clr_free(Drw *drw, Clr *c);
 Clr *drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount);
+void drw_scm_free(Drw *drw, Clr *scm, size_t clrcount);
 
 /* Cursor abstraction */
 Cur *drw_cur_create(Drw *drw, int shape);

dwm.c

@@ -40,6 +40,12 @@
 #include <X11/extensions/Xinerama.h>
 #endif /* XINERAMA */
 #include <X11/Xft/Xft.h>
+#include <X11/Xlib-xcb.h>
+#include <xcb/res.h>
+#ifdef __OpenBSD__
+#include <sys/sysctl.h>
+#include <kvm.h>
+#endif /* __OpenBSD */
 
 #include "drw.h"
 #include "util.h"
@@ -47,15 +53,20 @@
 /* macros */
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
+#define GETINC(X)               ((X) - 2000)
+#define INC(X)                  ((X) + 2000)
 #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 ISINC(X)                ((X) > 1000 && (X) < 3000)
 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
-#define LENGTH(X)               (sizeof X / sizeof X[0])
+#define MOD(N,M)                ((N)%(M) < 0 ? (N)%(M) + (M) : (N)%(M))
 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
+#define PREVSEL                 3000
 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
+#define TRUNC(X,A,B)            (MAX((A), MIN((X), (B))))
 
 /* enums */
 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
@@ -92,9 +103,11 @@ struct Client {
 	int basew, baseh, incw, inch, maxw, maxh, minw, minh, hintsvalid;
 	int bw, oldbw;
 	unsigned int tags;
-	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
+	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, isterminal, noswallow;
+	pid_t pid;
 	Client *next;
 	Client *snext;
+	Client *swallowing;
 	Monitor *mon;
 	Window win;
 };
@@ -138,6 +151,8 @@ typedef struct {
 	const char *title;
 	unsigned int tags;
 	int isfloating;
+	int isterminal;
+	int noswallow;
 	int monitor;
 } Rule;
 
@@ -187,6 +202,7 @@ static void movemouse(const Arg *arg);
 static Client *nexttiled(Client *c);
 static void pop(Client *c);
 static void propertynotify(XEvent *e);
+static void pushstack(const Arg *arg); /* patch stacker */
 static void quit(const Arg *arg);
 static Monitor *recttomon(int x, int y, int w, int h);
 static void resize(Client *c, int x, int y, int w, int h, int interact);
@@ -205,8 +221,8 @@ static void setmfact(const Arg *arg);
 static void setup(void);
 static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
-static void sigchld(int unused);
 static void spawn(const Arg *arg);
+static int stackpos(const Arg *arg); /* patch stacker */
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
 static void tile(Monitor *m);
@@ -235,6 +251,12 @@ static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
 
+static pid_t getparentprocess(pid_t p);
+static int isdescprocess(pid_t p, pid_t c);
+static Client *swallowingclient(Window w);
+static Client *termforwin(const Client *c);
+static pid_t winpid(Window w);
+
 /* variables */
 static const char broken[] = "broken";
 static char stext[256];
@@ -269,6 +291,8 @@ static Drw *drw;
 static Monitor *mons, *selmon;
 static Window root, wmcheckwin;
 
+static xcb_connection_t *xcon;
+
 /* configuration, allows nested code to access above variables */
 #include "config.h"
 
@@ -298,6 +322,8 @@ applyrules(Client *c)
 		&& (!r->class || strstr(class, r->class))
 		&& (!r->instance || strstr(instance, r->instance)))
 		{
+			c->isterminal = r->isterminal;
+			c->noswallow  = r->noswallow;
 			c->isfloating = r->isfloating;
 			c->tags |= r->tags;
 			for (m = mons; m && m->num != r->monitor; m = m->next);
@@ -416,6 +442,53 @@ attachstack(Client *c)
 	c->mon->stack = c;
 }
 
+void
+swallow(Client *p, Client *c)
+{
+
+	if (c->noswallow || c->isterminal)
+		return;
+	if (c->noswallow && !swallowfloating && c->isfloating)
+		return;
+
+	detach(c);
+	detachstack(c);
+
+	setclientstate(c, WithdrawnState);
+	XUnmapWindow(dpy, p->win);
+
+	p->swallowing = c;
+	c->mon = p->mon;
+
+	Window w = p->win;
+	p->win = c->win;
+	c->win = w;
+	updatetitle(p);
+	XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
+	arrange(p->mon);
+	configure(p);
+	updateclientlist();
+}
+
+void
+unswallow(Client *c)
+{
+	c->win = c->swallowing->win;
+
+	free(c->swallowing);
+	c->swallowing = NULL;
+
+	/* unfullscreen the client */
+	setfullscreen(c, 0);
+	updatetitle(c);
+	arrange(c->mon);
+	XMapWindow(dpy, c->win);
+	XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
+	setclientstate(c, NormalState);
+	focus(NULL);
+	arrange(c->mon);
+}
+
 void
 buttonpress(XEvent *e)
 {
@@ -488,7 +561,7 @@ cleanup(void)
 	for (i = 0; i < CurLast; i++)
 		drw_cur_free(drw, cursor[i]);
 	for (i = 0; i < LENGTH(colors); i++)
-		free(scheme[i]);
+		drw_scm_free(drw, scheme[i], 3);
 	free(scheme);
 	XDestroyWindow(dpy, wmcheckwin);
 	drw_free(drw);
@@ -656,6 +729,9 @@ destroynotify(XEvent *e)
 
 	if ((c = wintoclient(ev->window)))
 		unmanage(c, 1);
+
+	else if ((c = swallowingclient(ev->window)))
+		unmanage(c->swallowing, 1);
 }
 
 void
@@ -839,27 +915,16 @@ focusmon(const Arg *arg)
 void
 focusstack(const Arg *arg)
 {
-	Client *c = NULL, *i;
+	int i = stackpos(arg);
+	Client *c, *p;
 
-	if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
+	if(i < 0)
 		return;
-	if (arg->i > 0) {
+
-		for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
+	for(p = NULL, c = selmon->clients; c && (i || !ISVISIBLE(c));
-		if (!c)
+	    i -= ISVISIBLE(c) ? 1 : 0, p = c, c = c->next);
-			for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
+	focus(c ? c : p);
-	} else {
+	restack(selmon);
-		for (i = selmon->clients; i != selmon->sel; i = i->next)
-			if (ISVISIBLE(i))
-				c = i;
-		if (!c)
-			for (; i; i = i->next)
-				if (ISVISIBLE(i))
-					c = i;
-	}
-	if (c) {
-		focus(c);
-		restack(selmon);
-	}
 }
 
 Atom
@@ -955,16 +1020,26 @@ grabkeys(void)
 {
 	updatenumlockmask();
 	{
-		unsigned int i, j;
+		unsigned int i, j, k;
 		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
-		KeyCode code;
+		int start, end, skip;
+		KeySym *syms;
 
 		XUngrabKey(dpy, AnyKey, AnyModifier, root);
-		for (i = 0; i < LENGTH(keys); i++)
+		XDisplayKeycodes(dpy, &start, &end);
-			if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
+		syms = XGetKeyboardMapping(dpy, start, end - start + 1, &skip);
-				for (j = 0; j < LENGTH(modifiers); j++)
+		if (!syms)
-					XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
+			return;
-						True, GrabModeAsync, GrabModeAsync);
+		for (k = start; k <= end; k++)
+			for (i = 0; i < LENGTH(keys); i++)
+				/* skip modifier codes, we do that ourselves */
+				if (keys[i].keysym == syms[(k - start) * skip])
+					for (j = 0; j < LENGTH(modifiers); j++)
+						XGrabKey(dpy, k,
+							 keys[i].mod | modifiers[j],
+							 root, True,
+							 GrabModeAsync, GrabModeAsync);
+		XFree(syms);
 	}
 }
 
@@ -1022,12 +1097,13 @@ killclient(const Arg *arg)
 void
 manage(Window w, XWindowAttributes *wa)
 {
-	Client *c, *t = NULL;
+	Client *c, *t = NULL, *term = NULL;
 	Window trans = None;
 	XWindowChanges wc;
 
 	c = ecalloc(1, sizeof(Client));
 	c->win = w;
+	c->pid = winpid(w);
 	/* geometry */
 	c->x = c->oldx = wa->x;
 	c->y = c->oldy = wa->y;
@@ -1042,6 +1118,7 @@ manage(Window w, XWindowAttributes *wa)
 	} else {
 		c->mon = selmon;
 		applyrules(c);
+		term = termforwin(c);
 	}
 
 	if (c->x + WIDTH(c) > c->mon->wx + c->mon->ww)
@@ -1076,6 +1153,8 @@ manage(Window w, XWindowAttributes *wa)
 	c->mon->sel = c;
 	arrange(c->mon);
 	XMapWindow(dpy, c->win);
+	if (term)
+		swallow(term, c);
 	focus(NULL);
 }
 
@@ -1163,7 +1242,7 @@ movemouse(const Arg *arg)
 			handler[ev.type](&ev);
 			break;
 		case MotionNotify:
-			if ((ev.xmotion.time - lasttime) <= (1000 / 60))
+			if ((ev.xmotion.time - lasttime) <= (1000 / refreshrate))
 				continue;
 			lasttime = ev.xmotion.time;
 
@@ -1246,6 +1325,29 @@ propertynotify(XEvent *e)
 	}
 }
 
+void
+pushstack(const Arg *arg) {
+	int i = stackpos(arg);
+	Client *sel = selmon->sel, *c, *p;
+
+	if(i < 0)
+		return;
+	else if(i == 0) {
+		detach(sel);
+		attach(sel);
+	}
+	else {
+		for(p = NULL, c = selmon->clients; c; p = c, c = c->next)
+			if(!(i -= (ISVISIBLE(c) && c != sel)))
+				break;
+		c = c ? c : p;
+		detach(sel);
+		sel->next = c->next;
+		c->next = sel;
+	}
+	arrange(selmon);
+}
+
 void
 quit(const Arg *arg)
 {
@@ -1317,7 +1419,7 @@ resizemouse(const Arg *arg)
 			handler[ev.type](&ev);
 			break;
 		case MotionNotify:
-			if ((ev.xmotion.time - lasttime) <= (1000 / 60))
+			if ((ev.xmotion.time - lasttime) <= (1000 / refreshrate))
 				continue;
 			lasttime = ev.xmotion.time;
 
@@ -1533,9 +1635,16 @@ setup(void)
 	int i;
 	XSetWindowAttributes wa;
 	Atom utf8string;
+	struct sigaction sa;
 
-	/* clean up any zombies immediately */
+	/* do not transform children into zombies when they terminate */
-	sigchld(0);
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = SA_NOCLDSTOP | SA_NOCLDWAIT | SA_RESTART;
+	sa.sa_handler = SIG_IGN;
+	sigaction(SIGCHLD, &sa, NULL);
+
+	/* clean up any zombies (inherited from .xinitrc etc) immediately */
+	while (waitpid(-1, NULL, WNOHANG) > 0);
 
 	/* init screen */
 	screen = DefaultScreen(dpy);
@@ -1628,26 +1737,58 @@ showhide(Client *c)
 	}
 }
 
-void
-sigchld(int unused)
-{
-	if (signal(SIGCHLD, sigchld) == SIG_ERR)
-		die("can't install SIGCHLD handler:");
-	while (0 < waitpid(-1, NULL, WNOHANG));
-}
-
 void
 spawn(const Arg *arg)
 {
+	struct sigaction sa;
+
+	if (arg->v == dmenucmd)
+		dmenumon[0] = '0' + selmon->num;
 	if (fork() == 0) {
 		if (dpy)
 			close(ConnectionNumber(dpy));
 		setsid();
+
+		sigemptyset(&sa.sa_mask);
+		sa.sa_flags = 0;
+		sa.sa_handler = SIG_DFL;
+		sigaction(SIGCHLD, &sa, NULL);
+
 		execvp(((char **)arg->v)[0], (char **)arg->v);
 		die("dwm: execvp '%s' failed:", ((char **)arg->v)[0]);
 	}
 }
 
+int
+stackpos(const Arg *arg) {
+	int n, i;
+	Client *c, *l;
+
+	if(!selmon->clients)
+		return -1;
+
+	if(arg->i == PREVSEL) {
+		for(l = selmon->stack; l && (!ISVISIBLE(l) || l == selmon->sel); l = l->snext);
+		if(!l)
+			return -1;
+		for(i = 0, c = selmon->clients; c != l; i += ISVISIBLE(c) ? 1 : 0, c = c->next);
+		return i;
+	}
+	else if(ISINC(arg->i)) {
+		if(!selmon->sel)
+			return -1;
+		for(i = 0, c = selmon->clients; c != selmon->sel; i += ISVISIBLE(c) ? 1 : 0, c = c->next);
+		for(n = i; c; n += ISVISIBLE(c) ? 1 : 0, c = c->next);
+		return MOD(i + GETINC(arg->i), n);
+	}
+	else if(arg->i < 0) {
+		for(i = 0, c = selmon->clients; c; i += ISVISIBLE(c) ? 1 : 0, c = c->next);
+		return MAX(i + arg->i, 0);
+	}
+	else
+		return arg->i;
+}
+
 void
 tag(const Arg *arg)
 {
@@ -1763,6 +1904,20 @@ unmanage(Client *c, int destroyed)
 	Monitor *m = c->mon;
 	XWindowChanges wc;
 
+	if (c->swallowing) {
+		unswallow(c);
+		return;
+	}
+
+	Client *s = swallowingclient(c->win);
+	if (s) {
+		free(s->swallowing);
+		s->swallowing = NULL;
+		arrange(m);
+		focus(NULL);
+		return;
+	}
+
 	detach(c);
 	detachstack(c);
 	if (!destroyed) {
@@ -1778,9 +1933,12 @@ unmanage(Client *c, int destroyed)
 		XUngrabServer(dpy);
 	}
 	free(c);
-	focus(NULL);
+
-	updateclientlist();
+	if (!s) {
-	arrange(m);
+		arrange(m);
+		focus(NULL);
+		updateclientlist();
+	}
 }
 
 void
@@ -1833,7 +1991,7 @@ updatebarpos(Monitor *m)
 }
 
 void
-updateclientlist()
+updateclientlist(void)
 {
 	Client *c;
 	Monitor *m;
@@ -2044,6 +2202,136 @@ view(const Arg *arg)
 	arrange(selmon);
 }
 
+pid_t
+winpid(Window w)
+{
+
+	pid_t result = 0;
+
+#ifdef __linux__
+	xcb_res_client_id_spec_t spec = {0};
+	spec.client = w;
+	spec.mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID;
+
+	xcb_generic_error_t *e = NULL;
+	xcb_res_query_client_ids_cookie_t c = xcb_res_query_client_ids(xcon, 1, &spec);
+	xcb_res_query_client_ids_reply_t *r = xcb_res_query_client_ids_reply(xcon, c, &e);
+
+	if (!r)
+		return (pid_t)0;
+
+	xcb_res_client_id_value_iterator_t i = xcb_res_query_client_ids_ids_iterator(r);
+	for (; i.rem; xcb_res_client_id_value_next(&i)) {
+		spec = i.data->spec;
+		if (spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
+			uint32_t *t = xcb_res_client_id_value_value(i.data);
+			result = *t;
+			break;
+		}
+	}
+
+	free(r);
+
+	if (result == (pid_t)-1)
+		result = 0;
+
+#endif /* __linux__ */
+
+#ifdef __OpenBSD__
+        Atom type;
+        int format;
+        unsigned long len, bytes;
+        unsigned char *prop;
+        pid_t ret;
+
+        if (XGetWindowProperty(dpy, w, XInternAtom(dpy, "_NET_WM_PID", 0), 0, 1, False, AnyPropertyType, &type, &format, &len, &bytes, &prop) != Success || !prop)
+               return 0;
+
+        ret = *(pid_t*)prop;
+        XFree(prop);
+        result = ret;
+
+#endif /* __OpenBSD__ */
+	return result;
+}
+
+pid_t
+getparentprocess(pid_t p)
+{
+	unsigned int v = 0;
+
+#ifdef __linux__
+	FILE *f;
+	char buf[256];
+	snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);
+
+	if (!(f = fopen(buf, "r")))
+		return 0;
+
+	fscanf(f, "%*u %*s %*c %u", &v);
+	fclose(f);
+#endif /* __linux__*/
+
+#ifdef __OpenBSD__
+	int n;
+	kvm_t *kd;
+	struct kinfo_proc *kp;
+
+	kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, NULL);
+	if (!kd)
+		return 0;
+
+	kp = kvm_getprocs(kd, KERN_PROC_PID, p, sizeof(*kp), &n);
+	v = kp->p_ppid;
+#endif /* __OpenBSD__ */
+
+	return (pid_t)v;
+}
+
+int
+isdescprocess(pid_t p, pid_t c)
+{
+	while (p != c && c != 0)
+		c = getparentprocess(c);
+
+	return (int)c;
+}
+
+Client *
+termforwin(const Client *w)
+{
+	Client *c;
+	Monitor *m;
+
+	if (!w->pid || w->isterminal)
+		return NULL;
+
+	for (m = mons; m; m = m->next) {
+		for (c = m->clients; c; c = c->next) {
+			if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
+				return c;
+		}
+	}
+
+	return NULL;
+}
+
+Client *
+swallowingclient(Window w)
+{
+	Client *c;
+	Monitor *m;
+
+	for (m = mons; m; m = m->next) {
+		for (c = m->clients; c; c = c->next) {
+			if (c->swallowing && c->swallowing->win == w)
+				return c;
+		}
+	}
+
+	return NULL;
+}
+
 Client *
 wintoclient(Window w)
 {
@@ -2133,10 +2421,12 @@ main(int argc, char *argv[])
 		fputs("warning: no locale support\n", stderr);
 	if (!(dpy = XOpenDisplay(NULL)))
 		die("dwm: cannot open display");
+	if (!(xcon = XGetXCBConnection(dpy)))
+		die("dwm: cannot get xcb connection\n");
 	checkotherwm();
 	setup();
 #ifdef __OpenBSD__
-	if (pledge("stdio rpath proc exec", NULL) == -1)
+	if (pledge("stdio rpath proc exec ps", NULL) == -1)
 		die("pledge");
 #endif /* __OpenBSD__ */
 	scan();

fibonacci.c

@@ -0,0 +1,66 @@
+void
+fibonacci(Monitor *mon, int s) {
+	unsigned int i, n, nx, ny, nw, nh;
+	Client *c;
+
+	for(n = 0, c = nexttiled(mon->clients); c; c = nexttiled(c->next), n++);
+	if(n == 0)
+		return;
+
+	nx = mon->wx;
+	ny = 0;
+	nw = mon->ww;
+	nh = mon->wh;
+
+	for(i = 0, c = nexttiled(mon->clients); c; c = nexttiled(c->next)) {
+		if((i % 2 && nh / 2 > 2 * c->bw)
+		   || (!(i % 2) && nw / 2 > 2 * c->bw)) {
+			if(i < n - 1) {
+				if(i % 2)
+					nh /= 2;
+				else
+					nw /= 2;
+				if((i % 4) == 2 && !s)
+					nx += nw;
+				else if((i % 4) == 3 && !s)
+					ny += nh;
+			}
+			if((i % 4) == 0) {
+				if(s)
+					ny += nh;
+				else
+					ny -= nh;
+			}
+			else if((i % 4) == 1)
+				nx += nw;
+			else if((i % 4) == 2)
+				ny += nh;
+			else if((i % 4) == 3) {
+				if(s)
+					nx += nw;
+				else
+					nx -= nw;
+			}
+			if(i == 0)
+			{
+				if(n != 1)
+					nw = mon->ww * mon->mfact;
+				ny = mon->wy;
+			}
+			else if(i == 1)
+				nw = mon->ww - nw;
+			i++;
+		}
+		resize(c, nx, ny, nw - 2 * c->bw, nh - 2 * c->bw, False);
+	}
+}
+
+void
+dwindle(Monitor *mon) {
+	fibonacci(mon, 1);
+}
+
+void
+spiral(Monitor *mon) {
+	fibonacci(mon, 0);
+}

util.c

@@ -1,4 +1,5 @@
 /* See LICENSE file for copyright and license details. */
+#include <errno.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -10,17 +11,17 @@ void
 die(const char *fmt, ...)
 {
 	va_list ap;
+	int saved_errno;
+
+	saved_errno = errno;
 
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
 	va_end(ap);
 
-	if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
+	if (fmt[0] && fmt[strlen(fmt)-1] == ':')
-		fputc(' ', stderr);
+		fprintf(stderr, " %s", strerror(saved_errno));
-		perror(NULL);
+	fputc('\n', stderr);
-	} else {
-		fputc('\n', stderr);
-	}
 
 	exit(1);
 }

util.h

@@ -3,6 +3,7 @@
 #define MAX(A, B)               ((A) > (B) ? (A) : (B))
 #define MIN(A, B)               ((A) < (B) ? (A) : (B))
 #define BETWEEN(X, A, B)        ((A) <= (X) && (X) <= (B))
+#define LENGTH(X)               (sizeof (X) / sizeof (X)[0])
 
 void die(const char *fmt, ...);
 void *ecalloc(size_t nmemb, size_t size);