fixup! WIP my local config changes

Warps the mouse cursor to the center of the currently focused
window or screen when the mouse cursor is
  (a) on a different screen, or
  (b) on top of a different window.

This version properly handles warping to windows that have not been
mapped yet (before it resulted in a change of the stack order).
See the discussion in (thanks goes to Bakkeby):
    https://github.com/bakkeby/patches/issues/60

config.def.h

@@ -1,7 +1,8 @@
 /* See LICENSE file for copyright and license details. */
 
 /* appearance */
-static const unsigned int borderpx  = 1;        /* border pixel of windows */
+static const unsigned int borderpx  = 2;        /* border pixel of windows */
+static const unsigned int gappx     = 2;        /* gaps between windows */
 static const unsigned int snap      = 32;       /* snap pixel */
 static const int showbar            = 1;        /* 0 means no bar */
 static const int topbar             = 1;        /* 0 means bottom bar */
@@ -12,10 +13,19 @@ static const char col_gray2[]       = "#444444";
 static const char col_gray3[]       = "#bbbbbb";
 static const char col_gray4[]       = "#eeeeee";
 static const char col_cyan[]        = "#005577";
-static const char *colors[][3]      = {
+static const char col_border_focus_light[] = "#df8c20"; // hsl(34 75% 50%)
+static const char col_border_focus_dark[]  = "#b25e34"; // hsl(20 55% 45%)
+static const char *colorsdark[][3]      = {
 	/*               fg         bg         border   */
 	[SchemeNorm] = { col_gray3, col_gray1, col_gray2 },
-	[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
+	[SchemeSel]  = { col_gray4, col_cyan,  col_border_focus_dark },
+	[SchemeHid]  = { col_cyan,  col_gray1, col_cyan  },
+};
+static const char *colorslight[][3]      = {
+	/*               fg         bg         border   */
+	[SchemeNorm] = { col_gray1, col_gray3, col_gray2 },
+	[SchemeSel]  = { col_cyan,  col_gray4, col_border_focus_light },
+	[SchemeHid]  = { col_cyan,  col_gray1, col_cyan  },
 };
 
 /* tagging */
@@ -45,7 +55,7 @@ static const Layout layouts[] = {
 };
 
 /* key definitions */
-#define MODKEY Mod1Mask
+#define MODKEY Mod4Mask
 #define TAGKEYS(KEY,TAG) \
 	{ MODKEY,                       KEY,      view,           {.ui = 1 << TAG} }, \
 	{ MODKEY|ControlMask,           KEY,      toggleview,     {.ui = 1 << TAG} }, \
@@ -56,17 +66,24 @@ static const Layout layouts[] = {
 #define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } }
 
 /* commands */
-static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn() */
+static char dmenumon[2] = "0"; /* component of dmenu{dark,light}, manipulated in spawndmenu() */
-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 *dmenudark[] =  { "dmenu_run", "-m", dmenumon, "-i", "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
+static const char *dmenulight[] = { "dmenu_run", "-m", dmenumon, "-i", "-fn", dmenufont, "-nb", col_gray3, "-nf", col_gray1, "-sb", col_cyan, "-sf", col_gray4, NULL };
 static const char *termcmd[]  = { "st", NULL };
+static const char *lockcmd[]  = { "slock", NULL };
+static const char *suspendcmd[] = { "systemctl", "suspend", NULL };
+static const char *themecmd[]   = { "lupan-set-theme", "toggle", NULL };
 
+#include "exitdwm.c"
 static const Key keys[] = {
 	/* modifier                     key        function        argument */
-	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
+	{ MODKEY,                       XK_p,      spawndmenu,     {0} },
 	{ MODKEY|ShiftMask,             XK_Return, spawn,          {.v = termcmd } },
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
-	{ MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
+	{ MODKEY,                       XK_j,      focusstackvis,  {.i = +1 } },
-	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
+	{ MODKEY,                       XK_k,      focusstackvis,  {.i = -1 } },
+	{ MODKEY|ShiftMask,             XK_j,      focusstackhid,  {.i = +1 } },
+	{ MODKEY|ShiftMask,             XK_k,      focusstackhid,  {.i = -1 } },
 	{ MODKEY,                       XK_i,      incnmaster,     {.i = +1 } },
 	{ MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
 	{ MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
@@ -85,6 +102,9 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_period, focusmon,       {.i = +1 } },
 	{ MODKEY|ShiftMask,             XK_comma,  tagmon,         {.i = -1 } },
 	{ MODKEY|ShiftMask,             XK_period, tagmon,         {.i = +1 } },
+	{ MODKEY,                       XK_s,      show,           {0} },
+	{ MODKEY|ShiftMask,             XK_s,      showall,        {0} },
+	{ MODKEY,                       XK_h,      hide,           {0} },
 	TAGKEYS(                        XK_1,                      0)
 	TAGKEYS(                        XK_2,                      1)
 	TAGKEYS(                        XK_3,                      2)
@@ -94,7 +114,22 @@ static const Key keys[] = {
 	TAGKEYS(                        XK_7,                      6)
 	TAGKEYS(                        XK_8,                      7)
 	TAGKEYS(                        XK_9,                      8)
+	{ ControlMask,                  XK_1,      focusbynum,     {.i = 0} },
+	{ ControlMask,                  XK_2,      focusbynum,     {.i = 1} },
+	{ ControlMask,                  XK_3,      focusbynum,     {.i = 2} },
+	{ ControlMask,                  XK_4,      focusbynum,     {.i = 3} },
+	{ ControlMask,                  XK_5,      focusbynum,     {.i = 4} },
+	{ ControlMask,                  XK_6,      focusbynum,     {.i = 5} },
+	{ ControlMask,                  XK_7,      focusbynum,     {.i = 6} },
+	{ ControlMask,                  XK_8,      focusbynum,     {.i = 7} },
+	{ ControlMask,                  XK_9,      focusbynum,     {.i = 8} },
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
+	{ MODKEY|ControlMask|ShiftMask, XK_q,      quit,           {1} }, 
+	{ MODKEY|ShiftMask,             XK_e,      exitdwm,       {0} },
+	{ MODKEY|ControlMask|ShiftMask, XK_s,      spawn,          {.v = suspendcmd } },
+	{ MODKEY|ControlMask|ShiftMask, XK_l,      spawn,          {.v = lockcmd } },
+	{ MODKEY|ControlMask|ShiftMask, XK_t,      spawn,          {.v = themecmd } },
+
 };
 
 /* button definitions */
@@ -103,6 +138,7 @@ static const Button buttons[] = {
 	/* click                event mask      button          function        argument */
 	{ ClkLtSymbol,          0,              Button1,        setlayout,      {0} },
 	{ ClkLtSymbol,          0,              Button3,        setlayout,      {.v = &layouts[2]} },
+	{ ClkWinTitle,          0,              Button1,        togglewin,      {0} },
 	{ ClkWinTitle,          0,              Button2,        zoom,           {0} },
 	{ ClkStatusText,        0,              Button2,        spawn,          {.v = termcmd } },
 	{ ClkClientWin,         MODKEY,         Button1,        movemouse,      {0} },

dwm.1

@@ -142,6 +142,9 @@ Add/remove all windows with nth tag to/from the view.
 .TP
 .B Mod1\-Shift\-q
 Quit dwm.
+.TP
+.B Mod1\-Control\-Shift\-q
+Restart dwm.
 .SS Mouse commands
 .TP
 .B Mod1\-Button1
@@ -155,6 +158,13 @@ Resize focused window while dragging. Tiled windows will be toggled to the float
 .SH CUSTOMIZATION
 dwm is customized by creating a custom config.h and (re)compiling the source
 code. This keeps it fast, secure and simple.
+.SH SIGNALS
+.TP
+.B SIGHUP - 1
+Restart the dwm process.
+.TP
+.B SIGTERM - 15
+Cleanly terminate the dwm process.
 .SH SEE ALSO
 .BR dmenu (1),
 .BR st (1)

dwm.c

@@ -50,18 +50,20 @@
 #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 HIDDEN(C)               ((getstate(C->win) == IconicState))
+#define LENGTH(X)               (sizeof X / sizeof X[0])
 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
-#define WIDTH(X)                ((X)->w + 2 * (X)->bw)
+#define WIDTH(X)                ((X)->w + 2 * (X)->bw + gappx)
-#define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
+#define HEIGHT(X)               ((X)->h + 2 * (X)->bw + gappx)
 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
 
 /* enums */
 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
-enum { SchemeNorm, SchemeSel }; /* color schemes */
+enum { SchemeNorm, SchemeSel, SchemeHid }; /* color schemes */
 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
-       NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
+       NetWMWindowTypeDialog, NetClientList, NetClientInfo, NetLast }; /* EWMH atoms */
 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
@@ -116,6 +118,8 @@ struct Monitor {
 	int nmaster;
 	int num;
 	int by;               /* bar geometry */
+	int btw;              /* width of tasks portion of bar */
+	int bt;               /* number of tasks */
 	int mx, my, mw, mh;   /* screen size */
 	int wx, wy, ww, wh;   /* window area  */
 	unsigned int seltags;
@@ -123,6 +127,7 @@ struct Monitor {
 	unsigned int tagset[2];
 	int showbar;
 	int topbar;
+	int hidsel;
 	Client *clients;
 	Client *sel;
 	Client *stack;
@@ -152,6 +157,7 @@ static void checkotherwm(void);
 static void cleanup(void);
 static void cleanupmon(Monitor *mon);
 static void clientmessage(XEvent *e);
+static void colormodehandler(int sig);
 static void configure(Client *c);
 static void configurenotify(XEvent *e);
 static void configurerequest(XEvent *e);
@@ -167,13 +173,17 @@ static void expose(XEvent *e);
 static void focus(Client *c);
 static void focusin(XEvent *e);
 static void focusmon(const Arg *arg);
-static void focusstack(const Arg *arg);
+static void focusstackvis(const Arg *arg);
+static void focusstackhid(const Arg *arg);
+static void focusstack(int inc, int vis);
 static Atom getatomprop(Client *c, Atom prop);
 static int getrootptr(int *x, int *y);
 static long getstate(Window w);
 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 static void grabbuttons(Client *c, int focused);
 static void grabkeys(void);
+static void hide(const Arg *arg);
+static void hidewin(Client *c);
 static void incnmaster(const Arg *arg);
 static void keypress(XEvent *e);
 static void killclient(const Arg *arg);
@@ -197,21 +207,32 @@ static void scan(void);
 static int sendevent(Client *c, Atom proto);
 static void sendmon(Client *c, Monitor *m);
 static void setclientstate(Client *c, long state);
+static void setclienttagprop(Client *c);
+static void setcolormode(void);
 static void setfocus(Client *c);
 static void setfullscreen(Client *c, int fullscreen);
 static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
 static void seturgent(Client *c, int urg);
+static void show(const Arg *arg);
+static void showall(const Arg *arg);
+static void showwin(Client *c);
 static void showhide(Client *c);
+static void sigchld(int unused);
+static void sighup(int unused);
+static void sigterm(int unused);
 static void spawn(const Arg *arg);
+static void spawndmenu(const Arg *arg);
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
 static void tile(Monitor *m);
 static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
+static void focusbynum(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
+static void togglewin(const Arg *arg);
 static void unfocus(Client *c, int setfocus);
 static void unmanage(Client *c, int destroyed);
 static void unmapnotify(XEvent *e);
@@ -226,6 +247,7 @@ static void updatetitle(Client *c);
 static void updatewindowtype(Client *c);
 static void updatewmhints(Client *c);
 static void view(const Arg *arg);
+static void warp(const Client *c);
 static Client *wintoclient(Window w);
 static Monitor *wintomon(Window w);
 static int xerror(Display *dpy, XErrorEvent *ee);
@@ -259,13 +281,16 @@ static void (*handler[LASTEvent]) (XEvent *) = {
 	[UnmapNotify] = unmapnotify
 };
 static Atom wmatom[WMLast], netatom[NetLast];
+static int restart = 0;
 static int running = 1;
 static Cur *cursor[CurLast];
-static Clr **scheme;
+static Clr **scheme, **schemedark, **schemelight;
 static Display *dpy;
 static Drw *drw;
 static Monitor *mons, *selmon;
 static Window root, wmcheckwin;
+static const char **dmenucmd;
+static int colormodechanged;
 
 /* configuration, allows nested code to access above variables */
 #include "config.h"
@@ -440,10 +465,25 @@ buttonpress(XEvent *e)
 			arg.ui = 1 << i;
 		} else if (ev->x < x + TEXTW(selmon->ltsymbol))
 			click = ClkLtSymbol;
-		else if (ev->x > selmon->ww - (int)TEXTW(stext))
+		/* 2px right padding */
+		else if (ev->x > selmon->ww - TEXTW(stext) + lrpad - 2)
 			click = ClkStatusText;
+		else {
+			x += TEXTW(selmon->ltsymbol);
+			c = m->clients;
+
+			if (c) {
+				do {
+					if (!ISVISIBLE(c))
+						continue;
 					else
+						x +=(1.0 / (double)m->bt) * m->btw;
+				} while (ev->x > x && (c = c->next));
+
 				click = ClkWinTitle;
+				arg.v = c;
+			}
+		}
 	} else if ((c = wintoclient(ev->window))) {
 		focus(c);
 		restack(selmon);
@@ -453,7 +493,7 @@ buttonpress(XEvent *e)
 	for (i = 0; i < LENGTH(buttons); i++)
 		if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 		&& CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
-			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
+			buttons[i].func((click == ClkTagBar || click == ClkWinTitle) && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 }
 
 void
@@ -485,9 +525,12 @@ cleanup(void)
 		cleanupmon(mons);
 	for (i = 0; i < CurLast; i++)
 		drw_cur_free(drw, cursor[i]);
-	for (i = 0; i < LENGTH(colors); i++)
+	for (i = 0; i < LENGTH(colorsdark); i++) {
-		free(scheme[i]);
+		free(schemedark[i]);
-	free(scheme);
+		free(schemelight[i]);
+	}
+	free(schemedark);
+	free(schemelight);
 	XDestroyWindow(dpy, wmcheckwin);
 	drw_free(drw);
 	XSync(dpy, False);
@@ -530,6 +573,12 @@ clientmessage(XEvent *e)
 	}
 }
 
+void
+colormodehandler(int sig)
+{
+  colormodechanged = 1;
+}
+
 void
 configure(Client *c)
 {
@@ -697,7 +746,7 @@ dirtomon(int dir)
 void
 drawbar(Monitor *m)
 {
-	int x, w, tw = 0;
+	int x, w, tw = 0, n = 0, scm;
 	int boxs = drw->fonts->h / 9;
 	int boxw = drw->fonts->h / 6 + 2;
 	unsigned int i, occ = 0, urg = 0;
@@ -714,6 +763,8 @@ drawbar(Monitor *m)
 	}
 
 	for (c = m->clients; c; c = c->next) {
+		if (ISVISIBLE(c))
+			n++;
 		occ |= c->tags;
 		if (c->isurgent)
 			urg |= c->tags;
@@ -734,16 +785,36 @@ drawbar(Monitor *m)
 	x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 
 	if ((w = m->ww - tw - x) > bh) {
-		if (m->sel) {
+		if (n > 0) {
-			drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
+			int remainder = w % n;
-			drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
+			int tabw = (1.0 / (double)n) * w + 1;
-			if (m->sel->isfloating)
+			for (c = m->clients; c; c = c->next) {
-				drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
+				if (!ISVISIBLE(c))
+					continue;
+				if (m->sel == c)
+					scm = SchemeSel;
+				else if (HIDDEN(c))
+					scm = SchemeHid;
+				else
+					scm = SchemeNorm;
+				drw_setscheme(drw, scheme[scm]);
+
+				if (remainder >= 0) {
+					if (remainder == 0) {
+						tabw--;
+					}
+					remainder--;
+				}
+				drw_text(drw, x, 0, tabw, bh, lrpad / 2, c->name, 0);
+				x += tabw;
+			}
 		} else {
 			drw_setscheme(drw, scheme[SchemeNorm]);
 			drw_rect(drw, x, 0, w, bh, 1, 1);
 		}
 	}
+	m->bt = n;
+	m->btw = w;
 	drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 }
 
@@ -789,9 +860,17 @@ void
 focus(Client *c)
 {
 	if (!c || !ISVISIBLE(c))
-		for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
+		for (c = selmon->stack; c && (!ISVISIBLE(c) || HIDDEN(c)); c = c->snext);
-	if (selmon->sel && selmon->sel != c)
+	if (selmon->sel && selmon->sel != c) {
 		unfocus(selmon->sel, 0);
+
+		if (selmon->hidsel) {
+			hidewin(selmon->sel);
+			if (c)
+				arrange(c->mon);
+			selmon->hidsel = 0;
+		}
+	}
 	if (c) {
 		if (c->mon != selmon)
 			selmon = c->mon;
@@ -832,31 +911,56 @@ focusmon(const Arg *arg)
 	unfocus(selmon->sel, 0);
 	selmon = m;
 	focus(NULL);
+	warp(selmon->sel);
 }
 
 void
-focusstack(const Arg *arg)
+focusstackvis(const Arg *arg) {
+	focusstack(arg->i, 0);
+}
+
+void
+focusstackhid(const Arg *arg) {
+	focusstack(arg->i, 1);
+}
+
+void
+focusstack(int inc, int hid)
 {
 	Client *c = NULL, *i;
-
+	// if no client selected AND exclude hidden client; if client selected but fullscreened
-	if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
+	if ((!selmon->sel && !hid) || (selmon->sel && selmon->sel->isfullscreen && lockfullscreen))
 		return;
-	if (arg->i > 0) {
+	if (!selmon->clients)
-		for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
+		return;
+	if (inc > 0) {
+		if (selmon->sel)
+			for (c = selmon->sel->next;
+					c && (!ISVISIBLE(c) || (!hid && HIDDEN(c)));
+					c = c->next);
 		if (!c)
-			for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
+			for (c = selmon->clients;
+					c && (!ISVISIBLE(c) || (!hid && HIDDEN(c)));
+					c = c->next);
 	} else {
+		if (selmon->sel) {
 			for (i = selmon->clients; i != selmon->sel; i = i->next)
-			if (ISVISIBLE(i))
+				if (ISVISIBLE(i) && !(!hid && HIDDEN(i)))
 					c = i;
+		} else
+			c = selmon->clients;
 		if (!c)
 			for (; i; i = i->next)
-				if (ISVISIBLE(i))
+				if (ISVISIBLE(i) && !(!hid && HIDDEN(i)))
 					c = i;
 	}
 	if (c) {
 		focus(c);
 		restack(selmon);
+		if (HIDDEN(c)) {
+			showwin(c);
+			c->mon->hidsel = 1;
+		}
 	}
 }
 
@@ -976,6 +1080,36 @@ grabkeys(void)
 	}
 }
 
+void
+hide(const Arg *arg)
+{
+	hidewin(selmon->sel);
+	focus(NULL);
+	arrange(selmon);
+}
+
+void
+hidewin(Client *c) {
+	if (!c || HIDDEN(c))
+		return;
+
+	Window w = c->win;
+	static XWindowAttributes ra, ca;
+
+	// more or less taken directly from blackbox's hide() function
+	XGrabServer(dpy);
+	XGetWindowAttributes(dpy, root, &ra);
+	XGetWindowAttributes(dpy, w, &ca);
+	// prevent UnmapNotify events
+	XSelectInput(dpy, root, ra.your_event_mask & ~SubstructureNotifyMask);
+	XSelectInput(dpy, w, ca.your_event_mask & ~StructureNotifyMask);
+	XUnmapWindow(dpy, w);
+	setclientstate(c, IconicState);
+	XSelectInput(dpy, root, ra.your_event_mask);
+	XSelectInput(dpy, w, ca.your_event_mask);
+	XUngrabServer(dpy);
+}
+
 void
 incnmaster(const Arg *arg)
 {
@@ -1067,6 +1201,26 @@ manage(Window w, XWindowAttributes *wa)
 	updatewindowtype(c);
 	updatesizehints(c);
 	updatewmhints(c);
+	{
+		int format;
+		unsigned long *data, n, extra;
+		Monitor *m;
+		Atom atom;
+		if (XGetWindowProperty(dpy, c->win, netatom[NetClientInfo], 0L, 2L, False, XA_CARDINAL,
+				&atom, &format, &n, &extra, (unsigned char **)&data) == Success && n == 2) {
+			c->tags = *data;
+			for (m = mons; m; m = m->next) {
+				if (m->num == *(data+1)) {
+					c->mon = m;
+					break;
+				}
+			}
+		}
+		if (n > 0)
+			XFree(data);
+	}
+	setclienttagprop(c);
+
 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
 	grabbuttons(c, 0);
 	if (!c->isfloating)
@@ -1078,11 +1232,13 @@ manage(Window w, XWindowAttributes *wa)
 	XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
 		(unsigned char *) &(c->win), 1);
 	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
+	if (!HIDDEN(c))
 		setclientstate(c, NormalState);
 	if (c->mon == selmon)
 		unfocus(selmon->sel, 0);
 	c->mon->sel = c;
 	arrange(c->mon);
+	if (!HIDDEN(c))
 		XMapWindow(dpy, c->win);
 	focus(NULL);
 }
@@ -1204,7 +1360,7 @@ movemouse(const Arg *arg)
 Client *
 nexttiled(Client *c)
 {
-	for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
+	for (; c && (c->isfloating || !ISVISIBLE(c) || HIDDEN(c)); c = c->next);
 	return c;
 }
 
@@ -1224,6 +1380,10 @@ propertynotify(XEvent *e)
 	Window trans;
 	XPropertyEvent *ev = &e->xproperty;
 
+  if (colormodechanged) {
+    setcolormode();
+    colormodechanged = 0;
+  }
 	if ((ev->window == root) && (ev->atom == XA_WM_NAME))
 		updatestatus();
 	else if (ev->state == PropertyDelete)
@@ -1257,6 +1417,17 @@ propertynotify(XEvent *e)
 void
 quit(const Arg *arg)
 {
+	if(arg->i) restart = 1;
+	// fix: reloading dwm keeps all the hidden clients hidden
+	Monitor *m;
+	Client *c;
+	for (m = mons; m; m = m->next) {
+		if (m) {
+			for (c = m->stack; c; c = c->next)
+				if (c && HIDDEN(c)) showwin(c);
+		}
+	}
+
 	running = 0;
 }
 
@@ -1285,12 +1456,36 @@ void
 resizeclient(Client *c, int x, int y, int w, int h)
 {
 	XWindowChanges wc;
+	unsigned int n;
+	unsigned int gapoffset;
+	unsigned int gapincr;
+	Client *nbc;
 
-	c->oldx = c->x; c->x = wc.x = x;
-	c->oldy = c->y; c->y = wc.y = y;
-	c->oldw = c->w; c->w = wc.width = w;
-	c->oldh = c->h; c->h = wc.height = h;
 	wc.border_width = c->bw;
+
+	/* Get number of clients for the selected monitor */
+	for (n = 0, nbc = nexttiled(selmon->clients); nbc; nbc = nexttiled(nbc->next), n++);
+
+	/* Do nothing if layout is floating */
+	if (c->isfloating || selmon->lt[selmon->sellt]->arrange == NULL) {
+		gapincr = gapoffset = 0;
+	} else {
+		/* Remove border and gap if layout is monocle or only one client */
+		if (selmon->lt[selmon->sellt]->arrange == monocle || n == 1) {
+			gapoffset = 0;
+			gapincr = -2 * borderpx;
+			wc.border_width = 0;
+		} else {
+			gapoffset = gappx;
+			gapincr = 2 * gappx;
+		}
+	}
+
+	c->oldx = c->x; c->x = wc.x = x + gapoffset;
+	c->oldy = c->y; c->y = wc.y = y + gapoffset;
+	c->oldw = c->w; c->w = wc.width = w - gapincr;
+	c->oldh = c->h; c->h = wc.height = h - gapincr;
+
 	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 	configure(c);
 	XSync(dpy, False);
@@ -1374,6 +1569,8 @@ restack(Monitor *m)
 				wc.sibling = c->win;
 			}
 	}
+	if (m == selmon && (m->tagset[m->seltags] & m->sel->tags) && m->lt[m->sellt]->arrange != &monocle)
+		warp(m->sel);
 	XSync(dpy, False);
 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 }
@@ -1428,6 +1625,7 @@ sendmon(Client *c, Monitor *m)
 	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
 	attach(c);
 	attachstack(c);
+	setclienttagprop(c);
 	focus(NULL);
 	arrange(NULL);
 }
@@ -1441,6 +1639,32 @@ setclientstate(Client *c, long state)
 		PropModeReplace, (unsigned char *)data, 2);
 }
 
+void
+setcolormode(void)
+{
+	static const char *file = ".lightmode";
+	static char *path = NULL;
+	const char *home;
+	size_t size;
+
+	if (!path && (home = getenv("HOME"))) {
+		size = strlen(home) + 1 + strlen(file) + 1;
+		path = malloc(size);
+		if (!path)
+			die("dwm: malloc failed");
+
+		snprintf(path, size, "%s/%s", home, file);
+	}
+
+	if (access(path, F_OK) == 0) {
+		scheme = schemelight;
+		dmenucmd = dmenulight;
+	} else {
+		scheme = schemedark;
+		dmenucmd = dmenudark;
+	}
+}
+
 int
 sendevent(Client *c, Atom proto)
 {
@@ -1549,9 +1773,17 @@ setup(void)
 	sa.sa_handler = SIG_IGN;
 	sigaction(SIGCHLD, &sa, NULL);
 
+	/* set color mode on SIGUSR1 */
+	sigemptyset(&sa.sa_mask);
+	sa.sa_handler = colormodehandler;
+	sigaction(SIGUSR1, &sa, NULL);
+
 	/* clean up any zombies (inherited from .xinitrc etc) immediately */
 	while (waitpid(-1, NULL, WNOHANG) > 0);
 
+	signal(SIGHUP, sighup);
+	signal(SIGTERM, sigterm);
+
 	/* init screen */
 	screen = DefaultScreen(dpy);
 	sw = DisplayWidth(dpy, screen);
@@ -1578,14 +1810,19 @@ setup(void)
 	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
 	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 	netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
+	netatom[NetClientInfo] = XInternAtom(dpy, "_NET_CLIENT_INFO", False);
 	/* init cursors */
 	cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
 	cursor[CurResize] = drw_cur_create(drw, XC_sizing);
 	cursor[CurMove] = drw_cur_create(drw, XC_fleur);
 	/* init appearance */
-	scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
+	schemedark = ecalloc(LENGTH(colorsdark), sizeof(Clr *));
-	for (i = 0; i < LENGTH(colors); i++)
+	schemelight = ecalloc(LENGTH(colorslight), sizeof(Clr *));
-		scheme[i] = drw_scm_create(drw, colors[i], 3);
+	for (i = 0; i < LENGTH(colorsdark); i++) {
+		schemedark[i] = drw_scm_create(drw, colorsdark[i], 3);
+		schemelight[i] = drw_scm_create(drw, colorslight[i], 3);
+	}
+  setcolormode();
 	/* init bars */
 	updatebars();
 	updatestatus();
@@ -1601,6 +1838,7 @@ setup(void)
 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 		PropModeReplace, (unsigned char *) netatom, NetLast);
 	XDeleteProperty(dpy, root, netatom[NetClientList]);
+	XDeleteProperty(dpy, root, netatom[NetClientInfo]);
 	/* select events */
 	wa.cursor = cursor[CurNormal]->cursor;
 	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
@@ -1625,6 +1863,42 @@ seturgent(Client *c, int urg)
 	XFree(wmh);
 }
 
+void
+show(const Arg *arg)
+{
+	if (selmon->hidsel)
+		selmon->hidsel = 0;
+	showwin(selmon->sel);
+}
+
+void
+showall(const Arg *arg)
+{
+	Client *c = NULL;
+	selmon->hidsel = 0;
+	for (c = selmon->clients; c; c = c->next) {
+		if (ISVISIBLE(c))
+			showwin(c);
+	}
+	if (!selmon->sel) {
+		for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
+		if (c)
+			focus(c);
+	}
+	restack(selmon);
+}
+
+void
+showwin(Client *c)
+{
+	if (!c || !HIDDEN(c))
+		return;
+
+	XMapWindow(dpy, c->win);
+	setclientstate(c, NormalState);
+	arrange(c->mon);
+}
+
 void
 showhide(Client *c)
 {
@@ -1643,13 +1917,33 @@ 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
+sighup(int unused)
+{
+	Arg a = {.i = 1};
+	quit(&a);
+}
+
+void
+sigterm(int unused)
+{
+	Arg a = {.i = 0};
+	quit(&a);
+}
+
 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));
@@ -1665,11 +1959,29 @@ spawn(const Arg *arg)
 	}
 }
 
+void
+setclienttagprop(Client *c)
+{
+	long data[] = { (long) c->tags, (long) c->mon->num };
+	XChangeProperty(dpy, c->win, netatom[NetClientInfo], XA_CARDINAL, 32,
+			PropModeReplace, (unsigned char *) data, 2);
+}
+
+void
+spawndmenu(const Arg *arg)
+{
+	dmenumon[0] = '0' + selmon->num;
+	spawn(&(const Arg){.v = dmenucmd});
+}
+
 void
 tag(const Arg *arg)
 {
+	Client *c;
 	if (selmon->sel && arg->ui & TAGMASK) {
+		c = selmon->sel;
 		selmon->sel->tags = arg->ui & TAGMASK;
+		setclienttagprop(c);
 		focus(NULL);
 		arrange(selmon);
 	}
@@ -1734,6 +2046,19 @@ togglefloating(const Arg *arg)
 	arrange(selmon);
 }
 
+void
+focusbynum(const Arg *arg)
+{
+	int i;
+	Client *c;
+
+	i = 0;
+	c = nexttiled(selmon->clients);
+
+	for (; c && i < arg->i; c = nexttiled(c->next), i++);
+	focus(c);
+}
+
 void
 toggletag(const Arg *arg)
 {
@@ -1744,6 +2069,7 @@ toggletag(const Arg *arg)
 	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
 	if (newtags) {
 		selmon->sel->tags = newtags;
+		setclienttagprop(selmon->sel);
 		focus(NULL);
 		arrange(selmon);
 	}
@@ -1761,6 +2087,23 @@ toggleview(const Arg *arg)
 	}
 }
 
+void
+togglewin(const Arg *arg)
+{
+	Client *c = (Client*)arg->v;
+
+	if (c == selmon->sel) {
+		hidewin(c);
+		focus(NULL);
+		arrange(c->mon);
+	} else {
+		if (HIDDEN(c))
+			showwin(c);
+		focus(c);
+		restack(selmon);
+	}
+}
+
 void
 unfocus(Client *c, int setfocus)
 {
@@ -1863,6 +2206,16 @@ updateclientlist(void)
 				(unsigned char *) &(c->win), 1);
 }
 
+#ifdef XINERAMA
+// Custom comparator: sort monitors by x_org to match physical layout left-to-right
+static int
+compare_xinerama_x(const void *a, const void *b) {
+	const XineramaScreenInfo *sa = (const XineramaScreenInfo *)a;
+	const XineramaScreenInfo *sb = (const XineramaScreenInfo *)b;
+	return sa->x_org - sb->x_org;
+}
+#endif /* XINERAMA */
+
 int
 updategeom(void)
 {
@@ -1879,6 +2232,8 @@ updategeom(void)
 		for (n = 0, m = mons; m; m = m->next, n++);
 		/* only consider unique geometries as separate screens */
 		unique = ecalloc(nn, sizeof(XineramaScreenInfo));
+		// Sort monitors by x_org so dwm handles screens in left-to-right order
+		qsort(info, nn, sizeof(XineramaScreenInfo), compare_xinerama_x);
 		for (i = 0, j = 0; i < nn; i++)
 			if (isuniquegeom(unique, j, &info[i]))
 				memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
@@ -2061,6 +2416,28 @@ view(const Arg *arg)
 	arrange(selmon);
 }
 
+void
+warp(const Client *c)
+{
+	int x, y;
+
+	if (!c) {
+		XWarpPointer(dpy, None, root, 0, 0, 0, 0, selmon->wx + selmon->ww / 2, selmon->wy + selmon->wh / 2);
+		return;
+	}
+
+	if (!getrootptr(&x, &y) ||
+		(x > c->x - c->bw &&
+		 y > c->y - c->bw &&
+		 x < c->x + c->w + c->bw*2 &&
+		 y < c->y + c->h + c->bw*2) ||
+		(y > c->mon->by && y < c->mon->by + bh) ||
+		(c->mon->topbar && !y))
+		return;
+
+	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
+}
+
 Client *
 wintoclient(Window w)
 {
@@ -2158,6 +2535,7 @@ main(int argc, char *argv[])
 #endif /* __OpenBSD__ */
 	scan();
 	run();
+	if(restart) execvp(argv[0], argv);
 	cleanup();
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;

exitdwm.c

@@ -0,0 +1,87 @@
+# include <stdio.h>
+# include <string.h>
+
+void exitdwm ()
+{
+# if							   \
+	defined S_LOCK				|| \
+	defined S_RESTART_DWM		|| \
+	defined S_OFFSCREEN			|| \
+	defined S_EXIT				|| \
+	defined S_REBOOT			|| \
+	defined S_SHUTDOWN			|| \
+	defined S_LOCK_ICON			|| \
+	defined S_RESTART_DWM_ICON	|| \
+	defined S_OFFSCREEN_ICON	|| \
+	defined S_EXIT_ICON			|| \
+	defined S_REBOOT_ICON		|| \
+	defined S_SHUTDOWN_ICON		|| \
+	defined S_FORMAT			|| \
+	defined S_FORMAT_CLEAR
+# error (conflicting macro names)
+# endif
+
+# define S_LOCK "Lock"
+# define S_RESTART_DWM "restart Dwm"
+# define S_OFFSCREEN "Off-screen"
+# define S_EXIT "Exit"
+# define S_REBOOT "Reboot"
+# define S_SHUTDOWN "Shutdown"
+# define S_LOCK_ICON "\uf023"			// <= FontAwesome icons
+# define S_RESTART_DWM_ICON "\uf01e"
+# define S_OFFSCREEN_ICON "\uf108"
+# define S_EXIT_ICON "\uf2f5"
+# define S_REBOOT_ICON "\uf021"
+# define S_SHUTDOWN_ICON "\uf011"
+
+# define S_FORMAT(ACTION) S_##ACTION##_ICON " " S_##ACTION
+# define S_FORMAT_CLEAR "sed 's/^..//'"
+
+	FILE * exit_menu = popen (
+		"echo \""
+			S_FORMAT (LOCK) "\n"
+			S_FORMAT (RESTART_DWM) "\n"
+			S_FORMAT (OFFSCREEN) "\n"
+			S_FORMAT (EXIT) "\n"
+			S_FORMAT (REBOOT) "\n"
+			S_FORMAT (SHUTDOWN)
+			"\" | dmenu -p exit: | " S_FORMAT_CLEAR
+		,
+		"r"
+	);
+
+	char exit_action [16];
+
+	if (
+		exit_menu == NULL ||
+		fscanf (exit_menu, "%15[a-zA-Z -]", exit_action) == EOF
+	) {
+		fputs ("Error. Failure in exit_dwm.", stderr);
+		goto close_streams;
+	}
+
+	if (strcmp (exit_action, S_LOCK) == 0) system ("slock & sleep .5; xset dpms force off");
+	else if (strcmp (exit_action, S_RESTART_DWM) == 0) quit (& (const Arg) {1});
+	else if (strcmp (exit_action, S_OFFSCREEN) == 0) system ("sleep .5; xset dpms force off");
+	else if (strcmp (exit_action, S_EXIT) == 0) quit (& (const Arg) {0});
+	else if (strcmp (exit_action, S_REBOOT) == 0) system ("systemctl reboot");
+	else if (strcmp (exit_action, S_SHUTDOWN) == 0) system ("systemctl poweroff -i");
+
+close_streams:
+	pclose (exit_menu);
+
+# undef S_LOCK
+# undef S_RESTART_DWM
+# undef S_OFFSCREEN
+# undef S_EXIT
+# undef S_REBOOT
+# undef S_SHUTDOWN
+# undef S_LOCK_ICON
+# undef S_RESTART_DWM_ICON
+# undef S_OFFSCREEN_ICON
+# undef S_EXIT_ICON
+# undef S_REBOOT_ICON
+# undef S_SHUTDOWN_ICON
+# undef S_FORMAT
+# undef S_FORMAT_CLEAR
+}