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#1201 2013-03-28 08:20:34

jasonwryan
Anarchist
From: .nz
Registered: 2009-05-09
Posts: 20,100
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

When the thread title says "share or request patches" it doesn't mean there is a takeaway option...

Try and patch it in yourself and, if it errors out, open a separate thead with the details. Basically, though, if you aren't prepared to learn how to do it, use another wm.


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#1202 2013-03-28 08:27:41

parazyd
Member
From: Amsterdam
Registered: 2012-10-14
Posts: 259
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Fair enough smile

/EDIT

When patching, do I need to edit the PKGBUILD for rebuilding after I patch?
Seems like dwm.c gets overwritten whenever I run makepkg.

Okay, here's a request.
Could you edit my dwm.c to leave place for conky on the bottom of the screen, BOTTOM_BAR_HEIGHT should be 13. Thank you smile

/* See LICENSE file for copyright and license details.
 *
 * dynamic window manager is designed like any other X client as well. It is
 * driven through handling X events. In contrast to other X clients, a window
 * manager selects for SubstructureRedirectMask on the root window, to receive
 * events about window (dis-)appearance.  Only one X connection at a time is
 * allowed to select for this event mask.
 *
 * The event handlers of dwm are organized in an array which is accessed
 * whenever a new event has been fetched. This allows event dispatching
 * in O(1) time.
 *
 * Each child of the root window is called a client, except windows which have
 * set the override_redirect flag.  Clients are organized in a linked client
 * list on each monitor, the focus history is remembered through a stack list
 * on each monitor. Each client contains a bit array to indicate the tags of a
 * client.
 *
 * Keys and tagging rules are organized as arrays and defined in config.h.
 *
 * To understand everything else, start reading main().
 */
#include <errno.h>
#include <locale.h>
#include <stdarg.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xproto.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif /* XINERAMA */

/* macros */
#define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
#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 LENGTH(X)               (sizeof X / sizeof X[0])
#define MAX(A, B)               ((A) > (B) ? (A) : (B))
#define MIN(A, B)               ((A) < (B) ? (A) : (B))
#define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
#define WIDTH(X)                ((X)->w + 2 * (X)->bw)
#define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
#define TAGMASK                 ((1 << LENGTH(tags)) - 1)
#define TEXTW(X)                (textnw(X, strlen(X)) + dc.font.height)

/* enums */
enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
enum { NetSupported, NetWMName, NetWMState,
       NetWMFullscreen, NetActiveWindow, NetWMWindowType,
       NetWMWindowTypeDialog, NetLast };     /* EWMH atoms */
enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
       ClkClientWin, ClkRootWin, ClkLast };             /* clicks */

typedef union {
	int i;
	unsigned int ui;
	float f;
	const void *v;
} Arg;

typedef struct {
	unsigned int click;
	unsigned int mask;
	unsigned int button;
	void (*func)(const Arg *arg);
	const Arg arg;
} Button;

typedef struct Monitor Monitor;
typedef struct Client Client;
struct Client {
	char name[256];
	float mina, maxa;
	int x, y, w, h;
	int oldx, oldy, oldw, oldh;
	int basew, baseh, incw, inch, maxw, maxh, minw, minh;
	int bw, oldbw;
	unsigned int tags;
	Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
	Client *next;
	Client *snext;
	Monitor *mon;
	Window win;
};

typedef struct {
	int x, y, w, h;
	unsigned long norm[ColLast];
	unsigned long sel[ColLast];
	Drawable drawable;
	GC gc;
	struct {
		int ascent;
		int descent;
		int height;
		XFontSet set;
		XFontStruct *xfont;
	} font;
} DC; /* draw context */

typedef struct {
	unsigned int mod;
	KeySym keysym;
	void (*func)(const Arg *);
	const Arg arg;
} Key;

typedef struct {
	const char *symbol;
	void (*arrange)(Monitor *);
} Layout;

typedef struct Pertag Pertag;
struct Monitor {
	char ltsymbol[16];
	float mfact;
	int nmaster;
	int num;
	int by;               /* bar geometry */
	int mx, my, mw, mh;   /* screen size */
	int wx, wy, ww, wh;   /* window area  */
	unsigned int seltags;
	unsigned int sellt;
	unsigned int tagset[2];
	Bool showbar;
	Bool topbar;
	Client *clients;
	Client *sel;
	Client *stack;
	Monitor *next;
	Window barwin;
	const Layout *lt[2];
	Pertag *pertag;
};

typedef struct {
	const char *class;
	const char *instance;
	const char *title;
	unsigned int tags;
	Bool isfloating;
	int monitor;
} Rule;

/* function declarations */
static void applyrules(Client *c);
static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
static void arrange(Monitor *m);
static void arrangemon(Monitor *m);
static void attach(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 clearurgent(Client *c);
static void clientmessage(XEvent *e);
static void configure(Client *c);
static void configurenotify(XEvent *e);
static void configurerequest(XEvent *e);
static Monitor *createmon(void);
static void destroynotify(XEvent *e);
static void detach(Client *c);
static void detachstack(Client *c);
static void die(const char *errstr, ...);
static Monitor *dirtomon(int dir);
static void drawbar(Monitor *m);
static void drawbars(void);
static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
static void enternotify(XEvent *e);
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 unsigned long getcolor(const char *colstr);
static Bool getrootptr(int *x, int *y);
static long getstate(Window w);
static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
static void grabbuttons(Client *c, Bool focused);
static void grabkeys(void);
static void incnmaster(const Arg *arg);
static void initfont(const char *fontstr);
static void keypress(XEvent *e);
static void killclient(const Arg *arg);
static void manage(Window w, XWindowAttributes *wa);
static void mappingnotify(XEvent *e);
static void maprequest(XEvent *e);
static void monocle(Monitor *m);
static void motionnotify(XEvent *e);
static void movemouse(const Arg *arg);
static Client *nexttiled(Client *c);
static void pop(Client *);
static void propertynotify(XEvent *e);
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, Bool interact);
static void resizeclient(Client *c, int x, int y, int w, int h);
static void resizemouse(const Arg *arg);
static void restack(Monitor *m);
static void run(void);
static void scan(void);
static Bool sendevent(Client *c, Atom proto);
static void sendmon(Client *c, Monitor *m);
static void setclientstate(Client *c, long state);
static void setfocus(Client *c);
static void setfullscreen(Client *c, Bool fullscreen);
static void setlayout(const Arg *arg);
static void setmfact(const Arg *arg);
static void setup(void);
static void showhide(Client *c);
static void sigchld(int unused);
static void spawn(const Arg *arg);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
static int textnw(const char *text, unsigned int len);
static void tile(Monitor *);
static void togglebar(const Arg *arg);
static void togglefloating(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
static void unfocus(Client *c, Bool setfocus);
static void unmanage(Client *c, Bool destroyed);
static void unmapnotify(XEvent *e);
static Bool updategeom(void);
static void updatebarpos(Monitor *m);
static void updatebars(void);
static void updatenumlockmask(void);
static void updatesizehints(Client *c);
static void updatestatus(void);
static void updatewindowtype(Client *c);
static void updatetitle(Client *c);
static void updatewmhints(Client *c);
static void view(const Arg *arg);
static Client *wintoclient(Window w);
static Monitor *wintomon(Window w);
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);

/* variables */
static const char broken[] = "broken";
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 (*xerrorxlib)(Display *, XErrorEvent *);
static unsigned int numlockmask = 0;
static void (*handler[LASTEvent]) (XEvent *) = {
	[ButtonPress] = buttonpress,
	[ClientMessage] = clientmessage,
	[ConfigureRequest] = configurerequest,
	[ConfigureNotify] = configurenotify,
	[DestroyNotify] = destroynotify,
	[EnterNotify] = enternotify,
	[Expose] = expose,
	[FocusIn] = focusin,
	[KeyPress] = keypress,
	[MappingNotify] = mappingnotify,
	[MapRequest] = maprequest,
	[MotionNotify] = motionnotify,
	[PropertyNotify] = propertynotify,
	[UnmapNotify] = unmapnotify
};
static Atom wmatom[WMLast], netatom[NetLast];
static Bool running = True;
static Cursor cursor[CurLast];
static Display *dpy;
static DC dc;
static Monitor *mons = NULL, *selmon = NULL;
static Window root;

/* configuration, allows nested code to access above variables */
#include "config.h"

struct Pertag {
	unsigned int curtag, prevtag; /* current and previous tag */
	int nmasters[LENGTH(tags) + 1]; /* number of windows in master area */
	float mfacts[LENGTH(tags) + 1]; /* mfacts per tag */
	unsigned int sellts[LENGTH(tags) + 1]; /* selected layouts */
	const Layout *ltidxs[LENGTH(tags) + 1][2]; /* matrix of tags and layouts indexes  */
	Bool showbars[LENGTH(tags) + 1]; /* display bar for the current tag */
};


/* compile-time check if all tags fit into an unsigned int bit array. */
struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };

/* function implementations */
void
applyrules(Client *c) {
	const char *class, *instance;
	unsigned int i;
	const Rule *r;
	Monitor *m;
	XClassHint ch = { NULL, NULL };

	/* rule matching */
	c->isfloating = c->tags = 0;
	XGetClassHint(dpy, c->win, &ch);
	class    = ch.res_class ? ch.res_class : broken;
	instance = ch.res_name  ? ch.res_name  : broken;

	for(i = 0; i < LENGTH(rules); i++) {
		r = &rules[i];
		if((!r->title || strstr(c->name, r->title))
		&& (!r->class || strstr(class, r->class))
		&& (!r->instance || strstr(instance, r->instance)))
		{
			c->isfloating = r->isfloating;
			c->tags |= r->tags;
			for(m = mons; m && m->num != r->monitor; m = m->next);
			if(m)
				c->mon = m;
		}
	}
	if(ch.res_class)
		XFree(ch.res_class);
	if(ch.res_name)
		XFree(ch.res_name);
	c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
}

Bool
applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
	Bool baseismin;
	Monitor *m = c->mon;

	/* set minimum possible */
	*w = MAX(1, *w);
	*h = MAX(1, *h);
	if(interact) {
		if(*x > sw)
			*x = sw - WIDTH(c);
		if(*y > sh)
			*y = sh - HEIGHT(c);
		if(*x + *w + 2 * c->bw < 0)
			*x = 0;
		if(*y + *h + 2 * c->bw < 0)
			*y = 0;
	}
	else {
		if(*x >= m->wx + m->ww)
			*x = m->wx + m->ww - WIDTH(c);
		if(*y >= m->wy + m->wh)
			*y = m->wy + m->wh - HEIGHT(c);
		if(*x + *w + 2 * c->bw <= m->wx)
			*x = m->wx;
		if(*y + *h + 2 * c->bw <= m->wy)
			*y = m->wy;
	}
	if(*h < bh)
		*h = bh;
	if(*w < bh)
		*w = bh;
	if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
		/* see last two sentences in ICCCM 4.1.2.3 */
		baseismin = c->basew == c->minw && c->baseh == c->minh;
		if(!baseismin) { /* temporarily remove base dimensions */
			*w -= c->basew;
			*h -= c->baseh;
		}
		/* adjust for aspect limits */
		if(c->mina > 0 && c->maxa > 0) {
			if(c->maxa < (float)*w / *h)
				*w = *h * c->maxa + 0.5;
			else if(c->mina < (float)*h / *w)
				*h = *w * c->mina + 0.5;
		}
		if(baseismin) { /* increment calculation requires this */
			*w -= c->basew;
			*h -= c->baseh;
		}
		/* adjust for increment value */
		if(c->incw)
			*w -= *w % c->incw;
		if(c->inch)
			*h -= *h % c->inch;
		/* restore base dimensions */
		*w = MAX(*w + c->basew, c->minw);
		*h = MAX(*h + c->baseh, c->minh);
		if(c->maxw)
			*w = MIN(*w, c->maxw);
		if(c->maxh)
			*h = MIN(*h, c->maxh);
	}
	return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
}

void
arrange(Monitor *m) {
	if(m)
		showhide(m->stack);
	else for(m = mons; m; m = m->next)
		showhide(m->stack);
	if(m)
		arrangemon(m);
	else for(m = mons; m; m = m->next)
		arrangemon(m);
}

void
arrangemon(Monitor *m) {
	strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
	if(m->lt[m->sellt]->arrange)
		m->lt[m->sellt]->arrange(m);
	restack(m);
}

void
attach(Client *c) {
	c->next = c->mon->clients;
	c->mon->clients = c;
}

void
attachstack(Client *c) {
	c->snext = c->mon->stack;
	c->mon->stack = c;
}

void
buttonpress(XEvent *e) {
	unsigned int i, x, click;
	Arg arg = {0};
	Client *c;
	Monitor *m;
	XButtonPressedEvent *ev = &e->xbutton;

	click = ClkRootWin;
	/* focus monitor if necessary */
	if((m = wintomon(ev->window)) && m != selmon) {
		unfocus(selmon->sel, True);
		selmon = m;
		focus(NULL);
	}
	if(ev->window == selmon->barwin) {
		i = x = 0;
		do
			x += TEXTW(tags[i]);
		while(ev->x >= x && ++i < LENGTH(tags));
		if(i < LENGTH(tags)) {
			click = ClkTagBar;
			arg.ui = 1 << i;
		}
		else if(ev->x < x + blw)
			click = ClkLtSymbol;
		else if(ev->x > selmon->ww - TEXTW(stext))
			click = ClkStatusText;
		else
			click = ClkWinTitle;
	}
	else if((c = wintoclient(ev->window))) {
		focus(c);
		click = ClkClientWin;
	}
	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);
}

void
checkotherwm(void) {
	xerrorxlib = XSetErrorHandler(xerrorstart);
	/* this causes an error if some other window manager is running */
	XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
	XSync(dpy, False);
	XSetErrorHandler(xerror);
	XSync(dpy, False);
}

void
cleanup(void) {
	Arg a = {.ui = ~0};
	Layout foo = { "", NULL };
	Monitor *m;

	view(&a);
	selmon->lt[selmon->sellt] = &foo;
	for(m = mons; m; m = m->next)
		while(m->stack)
			unmanage(m->stack, False);
	if(dc.font.set)
		XFreeFontSet(dpy, dc.font.set);
	else
		XFreeFont(dpy, dc.font.xfont);
	XUngrabKey(dpy, AnyKey, AnyModifier, root);
	XFreePixmap(dpy, dc.drawable);
	XFreeGC(dpy, dc.gc);
	XFreeCursor(dpy, cursor[CurNormal]);
	XFreeCursor(dpy, cursor[CurResize]);
	XFreeCursor(dpy, cursor[CurMove]);
	while(mons)
		cleanupmon(mons);
	XSync(dpy, False);
	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
}

void
cleanupmon(Monitor *mon) {
	Monitor *m;

	if(mon == mons)
		mons = mons->next;
	else {
		for(m = mons; m && m->next != mon; m = m->next);
		m->next = mon->next;
	}
	XUnmapWindow(dpy, mon->barwin);
	XDestroyWindow(dpy, mon->barwin);
	free(mon);
}

void
clearurgent(Client *c) {
	XWMHints *wmh;

	c->isurgent = False;
	if(!(wmh = XGetWMHints(dpy, c->win)))
		return;
	wmh->flags &= ~XUrgencyHint;
	XSetWMHints(dpy, c->win, wmh);
	XFree(wmh);
}

void
clientmessage(XEvent *e) {
	XClientMessageEvent *cme = &e->xclient;
	Client *c = wintoclient(cme->window);

	if(!c)
		return;
	if(cme->message_type == netatom[NetWMState]) {
		if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
			setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
			              || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
	}
	else if(cme->message_type == netatom[NetActiveWindow]) {
		if(!ISVISIBLE(c)) {
			c->mon->seltags ^= 1;
			c->mon->tagset[c->mon->seltags] = c->tags;
		}
		pop(c);
	}
}

void
configure(Client *c) {
	XConfigureEvent ce;

	ce.type = ConfigureNotify;
	ce.display = dpy;
	ce.event = c->win;
	ce.window = c->win;
	ce.x = c->x;
	ce.y = c->y;
	ce.width = c->w;
	ce.height = c->h;
	ce.border_width = c->bw;
	ce.above = None;
	ce.override_redirect = False;
	XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
}

void
configurenotify(XEvent *e) {
	Monitor *m;
	XConfigureEvent *ev = &e->xconfigure;
	Bool dirty;

	if(ev->window == root) {
		dirty = (sw != ev->width);
		sw = ev->width;
		sh = ev->height;
		if(updategeom() || dirty) {
			if(dc.drawable != 0)
				XFreePixmap(dpy, dc.drawable);
			dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
			updatebars();
			for(m = mons; m; m = m->next)
				XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
			focus(NULL);
			arrange(NULL);
		}
	}
}

void
configurerequest(XEvent *e) {
	Client *c;
	Monitor *m;
	XConfigureRequestEvent *ev = &e->xconfigurerequest;
	XWindowChanges wc;

	if((c = wintoclient(ev->window))) {
		if(ev->value_mask & CWBorderWidth)
			c->bw = ev->border_width;
		else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
			m = c->mon;
			if(ev->value_mask & CWX) {
				c->oldx = c->x;
				c->x = m->mx + ev->x;
			}
			if(ev->value_mask & CWY) {
				c->oldy = c->y;
				c->y = m->my + ev->y;
			}
			if(ev->value_mask & CWWidth) {
				c->oldw = c->w;
				c->w = ev->width;
			}
			if(ev->value_mask & CWHeight) {
				c->oldh = c->h;
				c->h = ev->height;
			}
			if((c->x + c->w) > m->mx + m->mw && c->isfloating)
				c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
			if((c->y + c->h) > m->my + m->mh && c->isfloating)
				c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
			if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
				configure(c);
			if(ISVISIBLE(c))
				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
		}
		else
			configure(c);
	}
	else {
		wc.x = ev->x;
		wc.y = ev->y;
		wc.width = ev->width;
		wc.height = ev->height;
		wc.border_width = ev->border_width;
		wc.sibling = ev->above;
		wc.stack_mode = ev->detail;
		XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
	}
	XSync(dpy, False);
}

Monitor *
createmon(void) {
	Monitor *m;
	int i;

	if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
		die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
	m->tagset[0] = m->tagset[1] = 1;
	m->mfact = mfact;
	m->nmaster = nmaster;
	m->showbar = showbar;
	m->topbar = topbar;
	m->lt[0] = &layouts[0];
	m->lt[1] = &layouts[1 % LENGTH(layouts)];
	strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
	if(!(m->pertag = (Pertag *)calloc(1, sizeof(Pertag))))
		die("fatal: could not malloc() %u bytes\n", sizeof(Pertag));
	m->pertag->curtag = m->pertag->prevtag = 1;
	for(i=0; i <= LENGTH(tags); i++) {
		/* init nmaster */
		m->pertag->nmasters[i] = m->nmaster;

		/* init mfacts */
		m->pertag->mfacts[i] = m->mfact;

		/* init layouts */
		m->pertag->ltidxs[i][0] = m->lt[0];
		m->pertag->ltidxs[i][1] = m->lt[1];
		m->pertag->sellts[i] = m->sellt;

		/* init showbar */
		m->pertag->showbars[i] = m->showbar;
	}
	return m;
}

void
destroynotify(XEvent *e) {
	Client *c;
	XDestroyWindowEvent *ev = &e->xdestroywindow;

	if((c = wintoclient(ev->window)))
		unmanage(c, True);
}

void
detach(Client *c) {
	Client **tc;

	for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
	*tc = c->next;
}

void
detachstack(Client *c) {
	Client **tc, *t;

	for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
	*tc = c->snext;

	if(c == c->mon->sel) {
		for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
		c->mon->sel = t;
	}
}

void
die(const char *errstr, ...) {
	va_list ap;

	va_start(ap, errstr);
	vfprintf(stderr, errstr, ap);
	va_end(ap);
	exit(EXIT_FAILURE);
}

Monitor *
dirtomon(int dir) {
	Monitor *m = NULL;

	if(dir > 0) {
		if(!(m = selmon->next))
			m = mons;
	}
	else if(selmon == mons)
		for(m = mons; m->next; m = m->next);
	else
		for(m = mons; m->next != selmon; m = m->next);
	return m;
}

void
drawbar(Monitor *m) {
	int x;
	unsigned int i, occ = 0, urg = 0;
	unsigned long *col;
	Client *c;

	for(c = m->clients; c; c = c->next) {
		occ |= c->tags;
		if(c->isurgent)
			urg |= c->tags;
	}
	dc.x = 0;
	for(i = 0; i < LENGTH(tags); i++) {
		dc.w = TEXTW(tags[i]);
		col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
		drawtext(tags[i], col, urg & 1 << i);
		drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
		           occ & 1 << i, urg & 1 << i, col);
		dc.x += dc.w;
	}
	dc.w = blw = TEXTW(m->ltsymbol);
	drawtext(m->ltsymbol, dc.norm, False);
	dc.x += dc.w;
	x = dc.x;
	if(m == selmon) { /* status is only drawn on selected monitor */
		dc.w = TEXTW(stext);
		dc.x = m->ww - dc.w;
		if(dc.x < x) {
			dc.x = x;
			dc.w = m->ww - x;
		}
		drawtext(stext, dc.norm, False);
	}
	else
		dc.x = m->ww;
	if((dc.w = dc.x - x) > bh) {
		dc.x = x;
		if(m->sel) {
			col = m == selmon ? dc.sel : dc.norm;
			drawtext(m->sel->name, col, False);
			drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
		}
		else
			drawtext(NULL, dc.norm, False);
	}
	XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
	XSync(dpy, False);
}

void
drawbars(void) {
	Monitor *m;

	for(m = mons; m; m = m->next)
		drawbar(m);
}

void
drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
	int x;

	XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
	x = (dc.font.ascent + dc.font.descent + 2) / 4;
	if(filled)
		XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
	else if(empty)
		XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
}

void
drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
	char buf[256];
	int i, x, y, h, len, olen;

	XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
	XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
	if(!text)
		return;
	olen = strlen(text);
	h = dc.font.ascent + dc.font.descent;
	y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
	x = dc.x + (h / 2);
	/* shorten text if necessary */
	for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
	if(!len)
		return;
	memcpy(buf, text, len);
	if(len < olen)
		for(i = len; i && i > len - 3; buf[--i] = '.');
	XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
	if(dc.font.set)
		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
	else
		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
}

void
enternotify(XEvent *e) {
	Client *c;
	Monitor *m;
	XCrossingEvent *ev = &e->xcrossing;

	if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
		return;
	c = wintoclient(ev->window);
	m = c ? c->mon : wintomon(ev->window);
	if(m != selmon) {
		unfocus(selmon->sel, True);
		selmon = m;
	}
	else if(!c || c == selmon->sel)
		return;
	focus(c);
}

void
expose(XEvent *e) {
	Monitor *m;
	XExposeEvent *ev = &e->xexpose;

	if(ev->count == 0 && (m = wintomon(ev->window)))
		drawbar(m);
}

void
focus(Client *c) {
	if(!c || !ISVISIBLE(c))
		for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
	/* was if(selmon->sel) */
	if(selmon->sel && selmon->sel != c)
		unfocus(selmon->sel, False);
	if(c) {
		if(c->mon != selmon)
			selmon = c->mon;
		if(c->isurgent)
			clearurgent(c);
		detachstack(c);
		attachstack(c);
		grabbuttons(c, True);
		XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
		setfocus(c);
	}
	else
		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
	selmon->sel = c;
	drawbars();
}

void
focusin(XEvent *e) { /* there are some broken focus acquiring clients */
	XFocusChangeEvent *ev = &e->xfocus;

	if(selmon->sel && ev->window != selmon->sel->win)
		setfocus(selmon->sel);
}

void
focusmon(const Arg *arg) {
	Monitor *m;

	if(!mons->next)
		return;
	if((m = dirtomon(arg->i)) == selmon)
		return;
	unfocus(selmon->sel, True);
	selmon = m;
	focus(NULL);
}

void
focusstack(const Arg *arg) {
	Client *c = NULL, *i;

	if(!selmon->sel)
		return;
	if(arg->i > 0) {
		for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
		if(!c)
			for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
	}
	else {
		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
getatomprop(Client *c, Atom prop) {
	int di;
	unsigned long dl;
	unsigned char *p = NULL;
	Atom da, atom = None;

	if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
	                      &da, &di, &dl, &dl, &p) == Success && p) {
		atom = *(Atom *)p;
		XFree(p);
	}
	return atom;
}

unsigned long
getcolor(const char *colstr) {
	Colormap cmap = DefaultColormap(dpy, screen);
	XColor color;

	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
		die("error, cannot allocate color '%s'\n", colstr);
	return color.pixel;
}

Bool
getrootptr(int *x, int *y) {
	int di;
	unsigned int dui;
	Window dummy;

	return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
}

long
getstate(Window w) {
	int format;
	long result = -1;
	unsigned char *p = NULL;
	unsigned long n, extra;
	Atom real;

	if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
	                      &real, &format, &n, &extra, (unsigned char **)&p) != Success)
		return -1;
	if(n != 0)
		result = *p;
	XFree(p);
	return result;
}

Bool
gettextprop(Window w, Atom atom, char *text, unsigned int size) {
	char **list = NULL;
	int n;
	XTextProperty name;

	if(!text || size == 0)
		return False;
	text[0] = '\0';
	XGetTextProperty(dpy, w, &name, atom);
	if(!name.nitems)
		return False;
	if(name.encoding == XA_STRING)
		strncpy(text, (char *)name.value, size - 1);
	else {
		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
			strncpy(text, *list, size - 1);
			XFreeStringList(list);
		}
	}
	text[size - 1] = '\0';
	XFree(name.value);
	return True;
}

void
grabbuttons(Client *c, Bool focused) {
	updatenumlockmask();
	{
		unsigned int i, j;
		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
		if(focused) {
			for(i = 0; i < LENGTH(buttons); i++)
				if(buttons[i].click == ClkClientWin)
					for(j = 0; j < LENGTH(modifiers); j++)
						XGrabButton(dpy, buttons[i].button,
						            buttons[i].mask | modifiers[j],
						            c->win, False, BUTTONMASK,
						            GrabModeAsync, GrabModeSync, None, None);
		}
		else
			XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
			            BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
	}
}

void
grabkeys(void) {
	updatenumlockmask();
	{
		unsigned int i, j;
		unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
		KeyCode code;

		XUngrabKey(dpy, AnyKey, AnyModifier, root);
		for(i = 0; i < LENGTH(keys); i++)
			if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
				for(j = 0; j < LENGTH(modifiers); j++)
					XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
						 True, GrabModeAsync, GrabModeAsync);
	}
}

void
incnmaster(const Arg *arg) {
	selmon->nmaster = selmon->pertag->nmasters[selmon->pertag->curtag] = MAX(selmon->nmaster + arg->i, 0);
	arrange(selmon);
}

void
initfont(const char *fontstr) {
	char *def, **missing;
	int n;

	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
	if(missing) {
		while(n--)
			fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
		XFreeStringList(missing);
	}
	if(dc.font.set) {
		XFontStruct **xfonts;
		char **font_names;

		dc.font.ascent = dc.font.descent = 0;
		XExtentsOfFontSet(dc.font.set);
		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
		while(n--) {
			dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
			dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
			xfonts++;
		}
	}
	else {
		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
			die("error, cannot load font: '%s'\n", fontstr);
		dc.font.ascent = dc.font.xfont->ascent;
		dc.font.descent = dc.font.xfont->descent;
	}
	dc.font.height = dc.font.ascent + dc.font.descent;
}

#ifdef XINERAMA
static Bool
isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
	while(n--)
		if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
		&& unique[n].width == info->width && unique[n].height == info->height)
			return False;
	return True;
}
#endif /* XINERAMA */

void
keypress(XEvent *e) {
	unsigned int i;
	KeySym keysym;
	XKeyEvent *ev;

	ev = &e->xkey;
	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
	for(i = 0; i < LENGTH(keys); i++)
		if(keysym == keys[i].keysym
		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
		&& keys[i].func)
			keys[i].func(&(keys[i].arg));
}

void
killclient(const Arg *arg) {
	if(!selmon->sel)
		return;
	if(!sendevent(selmon->sel, wmatom[WMDelete])) {
		XGrabServer(dpy);
		XSetErrorHandler(xerrordummy);
		XSetCloseDownMode(dpy, DestroyAll);
		XKillClient(dpy, selmon->sel->win);
		XSync(dpy, False);
		XSetErrorHandler(xerror);
		XUngrabServer(dpy);
	}
}

void
manage(Window w, XWindowAttributes *wa) {
	Client *c, *t = NULL;
	Window trans = None;
	XWindowChanges wc;

	if(!(c = calloc(1, sizeof(Client))))
		die("fatal: could not malloc() %u bytes\n", sizeof(Client));
	c->win = w;
	updatetitle(c);
	if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
		c->mon = t->mon;
		c->tags = t->tags;
	}
	else {
		c->mon = selmon;
		applyrules(c);
	}
	/* geometry */
	c->x = c->oldx = wa->x;
	c->y = c->oldy = wa->y;
	c->w = c->oldw = wa->width;
	c->h = c->oldh = wa->height;
	c->oldbw = wa->border_width;

	if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
		c->x = c->mon->mx + c->mon->mw - WIDTH(c);
	if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
		c->y = c->mon->my + c->mon->mh - HEIGHT(c);
	c->x = MAX(c->x, c->mon->mx);
	/* only fix client y-offset, if the client center might cover the bar */
	c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
	           && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
	c->bw = borderpx;

	wc.border_width = c->bw;
	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
	XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
	configure(c); /* propagates border_width, if size doesn't change */
	updatewindowtype(c);
	updatesizehints(c);
	updatewmhints(c);
	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
	grabbuttons(c, False);
	if(!c->isfloating)
		c->isfloating = c->oldstate = trans != None || c->isfixed;
	if(c->isfloating)
		XRaiseWindow(dpy, c->win);
	attach(c);
	attachstack(c);
	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
	setclientstate(c, NormalState);
	if (c->mon == selmon)
		unfocus(selmon->sel, False);
	c->mon->sel = c;
	arrange(c->mon);
	XMapWindow(dpy, c->win);
	focus(NULL);
}

void
mappingnotify(XEvent *e) {
	XMappingEvent *ev = &e->xmapping;

	XRefreshKeyboardMapping(ev);
	if(ev->request == MappingKeyboard)
		grabkeys();
}

void
maprequest(XEvent *e) {
	static XWindowAttributes wa;
	XMapRequestEvent *ev = &e->xmaprequest;

	if(!XGetWindowAttributes(dpy, ev->window, &wa))
		return;
	if(wa.override_redirect)
		return;
	if(!wintoclient(ev->window))
		manage(ev->window, &wa);
}

void
monocle(Monitor *m) {
	unsigned int n = 0;
	Client *c;

	for(c = m->clients; c; c = c->next)
		if(ISVISIBLE(c))
			n++;
	if(n > 0) /* override layout symbol */
		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
	for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
}

void
motionnotify(XEvent *e) {
	static Monitor *mon = NULL;
	Monitor *m;
	XMotionEvent *ev = &e->xmotion;

	if(ev->window != root)
		return;
	if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
		selmon = m;
		focus(NULL);
	}
	mon = m;
}

void
movemouse(const Arg *arg) {
	int x, y, ocx, ocy, nx, ny;
	Client *c;
	Monitor *m;
	XEvent ev;

	if(!(c = selmon->sel))
		return;
	restack(selmon);
	ocx = c->x;
	ocy = c->y;
	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
	None, cursor[CurMove], CurrentTime) != GrabSuccess)
		return;
	if(!getrootptr(&x, &y))
		return;
	do {
		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
		switch(ev.type) {
		case ConfigureRequest:
		case Expose:
		case MapRequest:
			handler[ev.type](&ev);
			break;
		case MotionNotify:
			nx = ocx + (ev.xmotion.x - x);
			ny = ocy + (ev.xmotion.y - y);
			if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
			&& ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
				if(abs(selmon->wx - nx) < snap)
					nx = selmon->wx;
				else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
					nx = selmon->wx + selmon->ww - WIDTH(c);
				if(abs(selmon->wy - ny) < snap)
					ny = selmon->wy;
				else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
					ny = selmon->wy + selmon->wh - HEIGHT(c);
				if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
				&& (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
					togglefloating(NULL);
			}
			if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
				resize(c, nx, ny, c->w, c->h, True);
			break;
		}
	} while(ev.type != ButtonRelease);
	XUngrabPointer(dpy, CurrentTime);
	if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
		sendmon(c, m);
		selmon = m;
		focus(NULL);
	}
}

Client *
nexttiled(Client *c) {
	for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
	return c;
}

void
pop(Client *c) {
	detach(c);
	attach(c);
	focus(c);
	arrange(c->mon);
}

void
propertynotify(XEvent *e) {
	Client *c;
	Window trans;
	XPropertyEvent *ev = &e->xproperty;

	if((ev->window == root) && (ev->atom == XA_WM_NAME))
		updatestatus();
	else if(ev->state == PropertyDelete)
		return; /* ignore */
	else if((c = wintoclient(ev->window))) {
		switch(ev->atom) {
		default: break;
		case XA_WM_TRANSIENT_FOR:
			if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
			   (c->isfloating = (wintoclient(trans)) != NULL))
				arrange(c->mon);
			break;
		case XA_WM_NORMAL_HINTS:
			updatesizehints(c);
			break;
		case XA_WM_HINTS:
			updatewmhints(c);
			drawbars();
			break;
		}
		if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
			updatetitle(c);
			if(c == c->mon->sel)
				drawbar(c->mon);
		}
		if(ev->atom == netatom[NetWMWindowType])
			updatewindowtype(c);
	}
}

void
quit(const Arg *arg) {
	running = False;
}

Monitor *
recttomon(int x, int y, int w, int h) {
	Monitor *m, *r = selmon;
	int a, area = 0;

	for(m = mons; m; m = m->next)
		if((a = INTERSECT(x, y, w, h, m)) > area) {
			area = a;
			r = m;
		}
	return r;
}

void
resize(Client *c, int x, int y, int w, int h, Bool interact) {
	if(applysizehints(c, &x, &y, &w, &h, interact))
		resizeclient(c, x, y, w, h);
}

void
resizeclient(Client *c, int x, int y, int w, int h) {
	XWindowChanges wc;

	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;
	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
	configure(c);
	XSync(dpy, False);
}

void
resizemouse(const Arg *arg) {
	int ocx, ocy;
	int nw, nh;
	Client *c;
	Monitor *m;
	XEvent ev;

	if(!(c = selmon->sel))
		return;
	restack(selmon);
	ocx = c->x;
	ocy = c->y;
	if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
	                None, cursor[CurResize], CurrentTime) != GrabSuccess)
		return;
	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
	do {
		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
		switch(ev.type) {
		case ConfigureRequest:
		case Expose:
		case MapRequest:
			handler[ev.type](&ev);
			break;
		case MotionNotify:
			nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
			nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
			if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
			&& c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
			{
				if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
				&& (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
					togglefloating(NULL);
			}
			if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
				resize(c, c->x, c->y, nw, nh, True);
			break;
		}
	} while(ev.type != ButtonRelease);
	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
	XUngrabPointer(dpy, CurrentTime);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
	if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
		sendmon(c, m);
		selmon = m;
		focus(NULL);
	}
}

void
restack(Monitor *m) {
	Client *c;
	XEvent ev;
	XWindowChanges wc;

	drawbar(m);
	if(!m->sel)
		return;
	if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
		XRaiseWindow(dpy, m->sel->win);
	if(m->lt[m->sellt]->arrange) {
		wc.stack_mode = Below;
		wc.sibling = m->barwin;
		for(c = m->stack; c; c = c->snext)
			if(!c->isfloating && ISVISIBLE(c)) {
				XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
				wc.sibling = c->win;
			}
	}
	XSync(dpy, False);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
run(void) {
	XEvent ev;
	/* main event loop */
	XSync(dpy, False);
	while(running && !XNextEvent(dpy, &ev))
		if(handler[ev.type])
			handler[ev.type](&ev); /* call handler */
}

void
scan(void) {
	unsigned int i, num;
	Window d1, d2, *wins = NULL;
	XWindowAttributes wa;

	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
		for(i = 0; i < num; i++) {
			if(!XGetWindowAttributes(dpy, wins[i], &wa)
			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
				continue;
			if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
				manage(wins[i], &wa);
		}
		for(i = 0; i < num; i++) { /* now the transients */
			if(!XGetWindowAttributes(dpy, wins[i], &wa))
				continue;
			if(XGetTransientForHint(dpy, wins[i], &d1)
			&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
				manage(wins[i], &wa);
		}
		if(wins)
			XFree(wins);
	}
}

void
sendmon(Client *c, Monitor *m) {
	if(c->mon == m)
		return;
	unfocus(c, True);
	detach(c);
	detachstack(c);
	c->mon = m;
	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
	attach(c);
	attachstack(c);
	focus(NULL);
	arrange(NULL);
}

void
setclientstate(Client *c, long state) {
	long data[] = { state, None };

	XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
			PropModeReplace, (unsigned char *)data, 2);
}

Bool
sendevent(Client *c, Atom proto) {
	int n;
	Atom *protocols;
	Bool exists = False;
	XEvent ev;

	if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
		while(!exists && n--)
			exists = protocols[n] == proto;
		XFree(protocols);
	}
	if(exists) {
		ev.type = ClientMessage;
		ev.xclient.window = c->win;
		ev.xclient.message_type = wmatom[WMProtocols];
		ev.xclient.format = 32;
		ev.xclient.data.l[0] = proto;
		ev.xclient.data.l[1] = CurrentTime;
		XSendEvent(dpy, c->win, False, NoEventMask, &ev);
	}
	return exists;
}

void
setfocus(Client *c) {
	if(!c->neverfocus)
		XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
	sendevent(c, wmatom[WMTakeFocus]);
}

void
setfullscreen(Client *c, Bool fullscreen) {
	if(fullscreen) {
		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
		                PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
		c->isfullscreen = True;
		c->oldstate = c->isfloating;
		c->oldbw = c->bw;
		c->bw = 0;
		c->isfloating = True;
		resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
		XRaiseWindow(dpy, c->win);
	}
	else {
		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
		                PropModeReplace, (unsigned char*)0, 0);
		c->isfullscreen = False;
		c->isfloating = c->oldstate;
		c->bw = c->oldbw;
		c->x = c->oldx;
		c->y = c->oldy;
		c->w = c->oldw;
		c->h = c->oldh;
		resizeclient(c, c->x, c->y, c->w, c->h);
		arrange(c->mon);
	}
}

void
setlayout(const Arg *arg) {
	if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt]) {
		selmon->pertag->sellts[selmon->pertag->curtag] ^= 1;
		selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag];
	}
	if(arg && arg->v)
		selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt] = (Layout *)arg->v;
	selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt];
	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
	if(selmon->sel)
		arrange(selmon);
	else
		drawbar(selmon);
}

/* arg > 1.0 will set mfact absolutly */
void
setmfact(const Arg *arg) {
	float f;

	if(!arg || !selmon->lt[selmon->sellt]->arrange)
		return;
	f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
	if(f < 0.1 || f > 0.9)
		return;
	selmon->mfact = selmon->pertag->mfacts[selmon->pertag->curtag] = f;
	arrange(selmon);
}

void
setup(void) {
	XSetWindowAttributes wa;

	/* clean up any zombies immediately */
	sigchld(0);

	/* init screen */
	screen = DefaultScreen(dpy);
	root = RootWindow(dpy, screen);
	initfont(font);
	sw = DisplayWidth(dpy, screen);
	sh = DisplayHeight(dpy, screen);
	bh = dc.h = dc.font.height + 2;
	updategeom();
	/* init atoms */
	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
	wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
	netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
	netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
	netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
	/* init cursors */
	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
	/* init appearance */
	dc.norm[ColBorder] = getcolor(normbordercolor);
	dc.norm[ColBG] = getcolor(normbgcolor);
	dc.norm[ColFG] = getcolor(normfgcolor);
	dc.sel[ColBorder] = getcolor(selbordercolor);
	dc.sel[ColBG] = getcolor(selbgcolor);
	dc.sel[ColFG] = getcolor(selfgcolor);
	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
	dc.gc = XCreateGC(dpy, root, 0, NULL);
	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
	if(!dc.font.set)
		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
	/* init bars */
	updatebars();
	updatestatus();
	/* EWMH support per view */
	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
			PropModeReplace, (unsigned char *) netatom, NetLast);
	/* select for events */
	wa.cursor = cursor[CurNormal];
	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
	                |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
	XSelectInput(dpy, root, wa.event_mask);
	grabkeys();
}

void
showhide(Client *c) {
	if(!c)
		return;
	if(ISVISIBLE(c)) { /* show clients top down */
		XMoveWindow(dpy, c->win, c->x, c->y);
		if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
			resize(c, c->x, c->y, c->w, c->h, False);
		showhide(c->snext);
	}
	else { /* hide clients bottom up */
		showhide(c->snext);
		XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
	}
}

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) {
	if(fork() == 0) {
		if(dpy)
			close(ConnectionNumber(dpy));
		setsid();
		execvp(((char **)arg->v)[0], (char **)arg->v);
		fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
		perror(" failed");
		exit(EXIT_SUCCESS);
	}
}

void
tag(const Arg *arg) {
	if(selmon->sel && arg->ui & TAGMASK) {
		selmon->sel->tags = arg->ui & TAGMASK;
		focus(NULL);
		arrange(selmon);
	}
}

void
tagmon(const Arg *arg) {
	if(!selmon->sel || !mons->next)
		return;
	sendmon(selmon->sel, dirtomon(arg->i));
}

int
textnw(const char *text, unsigned int len) {
	XRectangle r;

	if(dc.font.set) {
		XmbTextExtents(dc.font.set, text, len, NULL, &r);
		return r.width;
	}
	return XTextWidth(dc.font.xfont, text, len);
}

void
tile(Monitor *m) {
	unsigned int i, n, h, mw, my, ty;
	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 = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
		if(i < m->nmaster) {
			h = (m->wh - my) / (MIN(n, m->nmaster) - i);
			resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False);
			my += HEIGHT(c);
		}
		else {
			h = (m->wh - ty) / (n - i);
			resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False);
			ty += HEIGHT(c);
		}
}

void
togglebar(const Arg *arg) {
	selmon->showbar = selmon->pertag->showbars[selmon->pertag->curtag] = !selmon->showbar;
	updatebarpos(selmon);
	XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
	arrange(selmon);
}

void
togglefloating(const Arg *arg) {
	if(!selmon->sel)
		return;
	selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
	if(selmon->sel->isfloating)
		resize(selmon->sel, selmon->sel->x, selmon->sel->y,
		       selmon->sel->w, selmon->sel->h, False);
	arrange(selmon);
}

void
toggletag(const Arg *arg) {
	unsigned int newtags;

	if(!selmon->sel)
		return;
	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
	if(newtags) {
		selmon->sel->tags = newtags;
		focus(NULL);
		arrange(selmon);
	}
}

void
toggleview(const Arg *arg) {
	unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
	int i;

	if(newtagset) {
		if(newtagset == ~0) {
			selmon->pertag->prevtag = selmon->pertag->curtag;
			selmon->pertag->curtag = 0;
		}
		/* test if the user did not select the same tag */
		if(!(newtagset & 1 << (selmon->pertag->curtag - 1))) {
			selmon->pertag->prevtag = selmon->pertag->curtag;
			for (i=0; !(newtagset & 1 << i); i++) ;
			selmon->pertag->curtag = i + 1;
		}
		selmon->tagset[selmon->seltags] = newtagset;

		/* apply settings for this view */
		selmon->nmaster = selmon->pertag->nmasters[selmon->pertag->curtag];
		selmon->mfact = selmon->pertag->mfacts[selmon->pertag->curtag];
		selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag];
		selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt];
		selmon->lt[selmon->sellt^1] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt^1];
		if (selmon->showbar != selmon->pertag->showbars[selmon->pertag->curtag])
			togglebar(NULL);
		focus(NULL);
		arrange(selmon);
	}
}

void
unfocus(Client *c, Bool setfocus) {
	if(!c)
		return;
	grabbuttons(c, False);
	XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
	if(setfocus)
		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
}

void
unmanage(Client *c, Bool destroyed) {
	Monitor *m = c->mon;
	XWindowChanges wc;

	/* The server grab construct avoids race conditions. */
	detach(c);
	detachstack(c);
	if(!destroyed) {
		wc.border_width = c->oldbw;
		XGrabServer(dpy);
		XSetErrorHandler(xerrordummy);
		XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
		XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
		setclientstate(c, WithdrawnState);
		XSync(dpy, False);
		XSetErrorHandler(xerror);
		XUngrabServer(dpy);
	}
	free(c);
	focus(NULL);
	arrange(m);
}

void
unmapnotify(XEvent *e) {
	Client *c;
	XUnmapEvent *ev = &e->xunmap;

	if((c = wintoclient(ev->window))) {
		if(ev->send_event)
			setclientstate(c, WithdrawnState);
		else
			unmanage(c, False);
	}
}

void
updatebars(void) {
	Monitor *m;
	XSetWindowAttributes wa = {
		.override_redirect = True,
		.background_pixmap = ParentRelative,
		.event_mask = ButtonPressMask|ExposureMask
	};
	for(m = mons; m; m = m->next) {
		m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
		                          CopyFromParent, DefaultVisual(dpy, screen),
		                          CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
		XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
		XMapRaised(dpy, m->barwin);
	}
}

void
updatebarpos(Monitor *m) {
	m->wy = m->my;
	m->wh = m->mh;
	if(m->showbar) {
		m->wh -= bh;
		m->by = m->topbar ? m->wy : m->wy + m->wh;
		m->wy = m->topbar ? m->wy + bh : m->wy;
	}
	else
		m->by = -bh;
}

Bool
updategeom(void) {
	Bool dirty = False;

#ifdef XINERAMA
	if(XineramaIsActive(dpy)) {
		int i, j, n, nn;
		Client *c;
		Monitor *m;
		XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
		XineramaScreenInfo *unique = NULL;

		for(n = 0, m = mons; m; m = m->next, n++);
		/* only consider unique geometries as separate screens */
		if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
			die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
		for(i = 0, j = 0; i < nn; i++)
			if(isuniquegeom(unique, j, &info[i]))
				memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
		XFree(info);
		nn = j;
		if(n <= nn) {
			for(i = 0; i < (nn - n); i++) { /* new monitors available */
				for(m = mons; m && m->next; m = m->next);
				if(m)
					m->next = createmon();
				else
					mons = createmon();
			}
			for(i = 0, m = mons; i < nn && m; m = m->next, i++)
				if(i >= n
				|| (unique[i].x_org != m->mx || unique[i].y_org != m->my
				    || unique[i].width != m->mw || unique[i].height != m->mh))
				{
					dirty = True;
					m->num = i;
					m->mx = m->wx = unique[i].x_org;
					m->my = m->wy = unique[i].y_org;
					m->mw = m->ww = unique[i].width;
					m->mh = m->wh = unique[i].height;
					updatebarpos(m);
				}
		}
		else { /* less monitors available nn < n */
			for(i = nn; i < n; i++) {
				for(m = mons; m && m->next; m = m->next);
				while(m->clients) {
					dirty = True;
					c = m->clients;
					m->clients = c->next;
					detachstack(c);
					c->mon = mons;
					attach(c);
					attachstack(c);
				}
				if(m == selmon)
					selmon = mons;
				cleanupmon(m);
			}
		}
		free(unique);
	}
	else
#endif /* XINERAMA */
	/* default monitor setup */
	{
		if(!mons)
			mons = createmon();
		if(mons->mw != sw || mons->mh != sh) {
			dirty = True;
			mons->mw = mons->ww = sw;
			mons->mh = mons->wh = sh;
			updatebarpos(mons);
		}
	}
	if(dirty) {
		selmon = mons;
		selmon = wintomon(root);
	}
	return dirty;
}

void
updatenumlockmask(void) {
	unsigned int i, j;
	XModifierKeymap *modmap;

	numlockmask = 0;
	modmap = XGetModifierMapping(dpy);
	for(i = 0; i < 8; i++)
		for(j = 0; j < modmap->max_keypermod; j++)
			if(modmap->modifiermap[i * modmap->max_keypermod + j]
			   == XKeysymToKeycode(dpy, XK_Num_Lock))
				numlockmask = (1 << i);
	XFreeModifiermap(modmap);
}

void
updatesizehints(Client *c) {
	long msize;
	XSizeHints size;

	if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
		/* size is uninitialized, ensure that size.flags aren't used */
		size.flags = PSize;
	if(size.flags & PBaseSize) {
		c->basew = size.base_width;
		c->baseh = size.base_height;
	}
	else if(size.flags & PMinSize) {
		c->basew = size.min_width;
		c->baseh = size.min_height;
	}
	else
		c->basew = c->baseh = 0;
	if(size.flags & PResizeInc) {
		c->incw = size.width_inc;
		c->inch = size.height_inc;
	}
	else
		c->incw = c->inch = 0;
	if(size.flags & PMaxSize) {
		c->maxw = size.max_width;
		c->maxh = size.max_height;
	}
	else
		c->maxw = c->maxh = 0;
	if(size.flags & PMinSize) {
		c->minw = size.min_width;
		c->minh = size.min_height;
	}
	else if(size.flags & PBaseSize) {
		c->minw = size.base_width;
		c->minh = size.base_height;
	}
	else
		c->minw = c->minh = 0;
	if(size.flags & PAspect) {
		c->mina = (float)size.min_aspect.y / size.min_aspect.x;
		c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
	}
	else
		c->maxa = c->mina = 0.0;
	c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
	             && c->maxw == c->minw && c->maxh == c->minh);
}

void
updatetitle(Client *c) {
	if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
		gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
	if(c->name[0] == '\0') /* hack to mark broken clients */
		strcpy(c->name, broken);
}

void
updatestatus(void) {
	if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
		strcpy(stext, "dwm-"VERSION);
	drawbar(selmon);
}

void
updatewindowtype(Client *c) {
	Atom state = getatomprop(c, netatom[NetWMState]);
	Atom wtype = getatomprop(c, netatom[NetWMWindowType]);

	if(state == netatom[NetWMFullscreen])
		setfullscreen(c, True);

	if(wtype == netatom[NetWMWindowTypeDialog])
		c->isfloating = True;
}

void
updatewmhints(Client *c) {
	XWMHints *wmh;

	if((wmh = XGetWMHints(dpy, c->win))) {
		if(c == selmon->sel && wmh->flags & XUrgencyHint) {
			wmh->flags &= ~XUrgencyHint;
			XSetWMHints(dpy, c->win, wmh);
		}
		else
			c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
		if(wmh->flags & InputHint)
			c->neverfocus = !wmh->input;
		else
			c->neverfocus = False;
		XFree(wmh);
	}
}

void
view(const Arg *arg) {
	int i;
	unsigned int tmptag;

	if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
		return;
	selmon->seltags ^= 1; /* toggle sel tagset */
	if(arg->ui & TAGMASK) {
		selmon->pertag->prevtag = selmon->pertag->curtag;
		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
		if(arg->ui == ~0)
			selmon->pertag->curtag = 0;
		else {
			for (i=0; !(arg->ui & 1 << i); i++) ;
			selmon->pertag->curtag = i + 1;
		}
	} else {
		tmptag = selmon->pertag->prevtag;
		selmon->pertag->prevtag = selmon->pertag->curtag;
		selmon->pertag->curtag = tmptag;
	}
	selmon->nmaster = selmon->pertag->nmasters[selmon->pertag->curtag];
	selmon->mfact = selmon->pertag->mfacts[selmon->pertag->curtag];
	selmon->sellt = selmon->pertag->sellts[selmon->pertag->curtag];
	selmon->lt[selmon->sellt] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt];
	selmon->lt[selmon->sellt^1] = selmon->pertag->ltidxs[selmon->pertag->curtag][selmon->sellt^1];
	if (selmon->showbar != selmon->pertag->showbars[selmon->pertag->curtag])
		togglebar(NULL);
	focus(NULL);
	arrange(selmon);
}

Client *
wintoclient(Window w) {
	Client *c;
	Monitor *m;

	for(m = mons; m; m = m->next)
		for(c = m->clients; c; c = c->next)
			if(c->win == w)
				return c;
	return NULL;
}

Monitor *
wintomon(Window w) {
	int x, y;
	Client *c;
	Monitor *m;

	if(w == root && getrootptr(&x, &y))
		return recttomon(x, y, 1, 1);
	for(m = mons; m; m = m->next)
		if(w == m->barwin)
			return m;
	if((c = wintoclient(w)))
		return c->mon;
	return selmon;
}

/* There's no way to check accesses to destroyed windows, thus those cases are
 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 * default error handler, which may call exit.  */
int
xerror(Display *dpy, XErrorEvent *ee) {
	if(ee->error_code == BadWindow
	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
	|| (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
		return 0;
	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
			ee->request_code, ee->error_code);
	return xerrorxlib(dpy, ee); /* may call exit */
}

int
xerrordummy(Display *dpy, XErrorEvent *ee) {
	return 0;
}

/* Startup Error handler to check if another window manager
 * is already running. */
int
xerrorstart(Display *dpy, XErrorEvent *ee) {
	die("dwm: another window manager is already running\n");
	return -1;
}

void
zoom(const Arg *arg) {
	Client *c = selmon->sel;

	if(!selmon->lt[selmon->sellt]->arrange
	|| (selmon->sel && selmon->sel->isfloating))
		return;
	if(c == nexttiled(selmon->clients))
		if(!c || !(c = nexttiled(c->next)))
			return;
	pop(c);
}

int
main(int argc, char *argv[]) {
	if(argc == 2 && !strcmp("-v", argv[1]))
		die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
	else if(argc != 1)
		die("usage: dwm [-v]\n");
	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
		fputs("warning: no locale support\n", stderr);
	if(!(dpy = XOpenDisplay(NULL)))
		die("dwm: cannot open display\n");
	checkotherwm();
	setup();
	scan();
	run();
	cleanup();
	XCloseDisplay(dpy);
	return EXIT_SUCCESS;
}

Last edited by parazyd (2013-03-28 11:40:27)

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#1203 2013-03-28 12:05:03

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Try what you see here: https://bbs.archlinux.org/viewtopic.php … 84#p939184
Or, try this one: http://lists.suckless.org/dev/0907/0644.html

Last edited by Unia (2013-03-28 12:06:50)


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1204 2013-03-28 12:38:35

parazyd
Member
From: Amsterdam
Registered: 2012-10-14
Posts: 259
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Works as a charm. Thanks!

I ran an older dwm.c and just switched to 6.0 so things changed a bit big_smile

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#1205 2013-04-07 17:47:43

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

I just whipped up a simple close button in the statusbar. I often found myself not willing to move my hands to the keyboard when I do have the mouse at reach (e.g. when watching a movie a bit further away from the keyboard). The glyph it would show is configurable in config.h and it appears next to the layout symbol. You can find it on my GitHub here: https://github.com/Unia/DWM/blob/master … ymbol.diff

See this post for a screenshot: https://bbs.archlinux.org/viewtopic.php … 4#p1255814


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1206 2013-04-07 18:22:26

parazyd
Member
From: Amsterdam
Registered: 2012-10-14
Posts: 259
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

@Unia: I don't see it. Is it that dot?
Also, what does it close, the focused application?

How clean the closing is? Will Firefox report a crashed session when closed that way?

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#1207 2013-04-07 18:24:39

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

parazyd wrote:

@Unia: I don't see it. Is it that dot?
Also, what does it close, the focused application?

How clean the closing is? Will Firefox report a crashed session when closed that way?

It's the dot indeed, yes. It closes the currently focused application, in the same way you would kill it with DWM's keybinding: it simply calls killclient()


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1208 2013-04-29 14:23:54

Ichigo-Roku
Member
Registered: 2012-01-15
Posts: 35

Re: DWM Hackers Unite! Share (or request) dwm patches.

Hi,

I have two screens, actually I have the same tags for the two screens. Is there a patch to configure which screen has which tag ?

Thanks.

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#1209 2013-04-29 16:44:43

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

There is this patch: http://dwm.suckless.org/patches/single_tagset

Otherwise, there is a rudimentary patch available that allows you to set up tags for each monitor, I want to test it myself but I haven't yet: http://article.gmane.org/gmane.comp.misc.suckless/4230


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1210 2013-04-30 13:02:20

Ichigo-Roku
Member
Registered: 2012-01-15
Posts: 35

Re: DWM Hackers Unite! Share (or request) dwm patches.

Thanks it's working like I wanted to ! I'm using the second one and it works very well.

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#1211 2013-04-30 14:18:02

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Can you tell me how it works with client rules?


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1212 2013-05-01 07:54:39

Ichigo-Roku
Member
Registered: 2012-01-15
Posts: 35

Re: DWM Hackers Unite! Share (or request) dwm patches.

You have to specify in which monitor you want your application to be shown :

{ "Thunderbird",    NULL,   NULL,   1 << 1, False,  1 },

The last "1" is for the second monitor (0 for the first monitor), so Thunderbird will be shown in the second tag of my second monitor.

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#1213 2013-05-01 08:07:43

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Oke great, that takes away my last concern with this patch. I'm not at home though and I won't be for the coming weeks, but once I'm home I'll test this.

Thanks!


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1214 2013-05-19 18:43:12

F34R
Member
From: /dev/loliland
Registered: 2012-02-05
Posts: 239

Re: DWM Hackers Unite! Share (or request) dwm patches.

Hello

Can  i make a simple, updateble configuration file like i3 or awesome (i called dwmrc) with binding key the restart wm ?

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#1215 2013-05-19 20:08:53

Trilby
Forum Moderator
From: Massachusetts, USA
Registered: 2011-11-29
Posts: 14,787
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

You can, but you'd have to write all of that from scratch as there is no mechanism in dwm to read from a configuration file.

You could see my poject 'iocane' which uses a very similar data structure for keybindings as dwm (maybe the exact same), but it allocates and fills this structure at run time by reading an rc file.


Specifically, this is on lines 86-107 of iocane.c.  I see I don't use the same structure as I've dropped modifier keys and use a `char *` rather than dwm's union type.  But the process would be the same: you'd read in the file line by line (or entry by entry), realloc the keys pointer, and fill the new keys entry with what was read from the file.  You should then also add something to the close/cleanup functions to free anything you allocated.

If that that all makes sense, then it should be pretty easy to do.  If that makes no sense, the you probably shouldn't tinker with the code that much.

Last edited by Trilby (2013-05-19 20:17:52)


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#1216 2013-05-19 20:34:44

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Another (more easy) solution would be to start DWM with this script through .xinitrc:

#!/bin/bash
while true; do
    dwm >/dev/null 2>&1
done

You can quit DWM but since it's called from an infinite loop, it will just restart itself.


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1217 2013-05-19 21:36:14

Trilby
Forum Moderator
From: Massachusetts, USA
Registered: 2011-11-29
Posts: 14,787
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Restarting is easy, he was asking about having an rc file in which he could change key bindings.


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#1218 2013-05-19 22:02:26

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

F34R wrote:

with binding key the restart wm ?

I thought he wanted an rc file to be able to restart the WM. Sorry.


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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#1219 2013-05-20 19:53:07

ANOKNUSA
Member
Registered: 2010-10-22
Posts: 2,141

Re: DWM Hackers Unite! Share (or request) dwm patches.

F34R wrote:

Hello

Can  i make a simple, updateble configuration file like i3 or awesome (i called dwmrc) with binding key the restart wm ?

Just out of curiosity: Why exactly do you want this?  The lack of such a file---the fact that all user configuration variables are hard-coded into the binary---is one of the only things that makes DWM fundamentally different from other tilers, and is done for specific reasons (simpler installation and program structure, no unused cruft in the filesystem, increased speed, minimal risk of breaking, etc.).  I guess I just get a little confused any time I see someone try out a new piece of software, who immediately tries to make it identical to some other piece of software. tongue

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#1220 2013-05-20 20:55:22

Raziel23
Member
Registered: 2010-03-30
Posts: 15

Re: DWM Hackers Unite! Share (or request) dwm patches.

Hi,

I want to share with you with a hack which is very useful for me (and maybe it will be also useful for somebody else). It change the toggleview function behaviour which now will pull the new tag to master rather than into the stack (technically it will pull the first client from the new pulled tag to master).

--- a/dwm.c	2013-05-20 21:27:31.811893884 +0200
+++ b/dwm.c	2013-05-20 21:27:54.899605248 +0200
@@ -1774,10 +1774,20 @@ toggletag(const Arg *arg) {
 void
 toggleview(const Arg *arg) {
 	unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
+	Client *c = NULL;
+	unsigned int found = 0;
 
 	if(newtagset) {
 		selmon->tagset[selmon->seltags] = newtagset;
-		focus(NULL);
+
+		for(c = selmon->clients; c && !(found = c->tags & arg->ui); c = c->next);
+		if(found && ISVISIBLE(c)) {
+			detach(c);
+			attach(c);
+			focus(c);
+		}
+		else
+			focus(NULL);
 		arrange(selmon);
 	}
 }

This patch is especially useful when you assign different clients to different tags and then you pull the clients using the toggleview function. This workflow is clearly explain here why tags ≠ workspaces.

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#1221 2013-05-20 20:59:03

jasonwryan
Anarchist
From: .nz
Registered: 2009-05-09
Posts: 20,100
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Raziel23 wrote:

I want to share with you with a hack which is very useful for me (and maybe it will be also useful for somebody else).

Superb. Thank you.


# edit: you should send this to the ML or put it on the suckless wiki.


Arch + dwm   •   Mercurial repos  •   Github

Registered Linux User #482438

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#1222 2013-05-20 22:03:46

Trilby
Forum Moderator
From: Massachusetts, USA
Registered: 2011-11-29
Posts: 14,787
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

RE: ANOKNUSA's comment on risk of breaking: implementing a *basic* rc file mechanism like I referred to in iocane is rather trivial - but this trivial mechanism 'trusts' the user: if they do something wrong with the rc file, the program could easily crash and burn.  Programs that read an rc file in a more sophisticated way and have proper checks for anything that could go wrong (such as i3) devote a good amount of code to this.

Just look at the code: dwm, 1 source file + 1 config.h + 1 makefile with a couple thousand lines of code total; i3, 69 C source files, 64 headers, 130 perl files 10 makefiles with 42 thousand lines of code.


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#1223 2013-05-20 23:01:22

ANOKNUSA
Member
Registered: 2010-10-22
Posts: 2,141

Re: DWM Hackers Unite! Share (or request) dwm patches.

@Trillby: I get all that; I just see it as a big plus for DWM relative to other window managers that, on top of its other benefits, it has two safeguards between the user and a broken X session: patching error messages and compiler error messages.  I've tried some good WMs, but I was always a bit annoyed that some other window managers tend to just revert to a default configuration any time you make a simple error somehwere in a 600-line config file, rather than just dropping to console and telling me what the error is (If I recall right, Subtle and WMFS do a good job of telling you what and where the error is after a crash).  With DWM, so long as one has correctly applied patches (and you know if you did before DWM is installed), then one will likely only change a handful of lines in config.h from time to time.  No risk of carelessly deleting some vital line in a text editor, or accidentally removing necessary files.

Of course DWM isn't perfect; for example, it looks like Raziel23 might have found a solution to something that's bugged me for a while. wink  Thanks Raziel.

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#1224 2013-05-21 19:04:35

Raziel23
Member
Registered: 2010-03-30
Posts: 15

Re: DWM Hackers Unite! Share (or request) dwm patches.

jasonwryan wrote:

# edit: you should send this to the ML or put it on the suckless wiki.

I glad that this patch will be useful not only for me, but I think it shouldn't be send to the suckless mailing list because it change the toggleview behaviour and thus it will not be include to the official code. On the other hand it may be a good idea to add it to the suckless wiki. You can feel free to do that.

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#1225 2013-05-21 19:06:46

Unia
Member
From: The Netherlands
Registered: 2010-03-30
Posts: 2,476
Website

Re: DWM Hackers Unite! Share (or request) dwm patches.

Raziel23 wrote:

because it change the toggleview behaviour and thus it will not be include to the official code.

Isn't a patch supposed to change behaviour? In any case, it's always worth a shot - especially if other people find it usefull too.


If you can't sit by a cozy fire with your code in hand enjoying its simplicity and clarity, it needs more work. --Carlos Torres

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