1 //#define XINULATOR /* debug, simulates dual head */
2 /* See LICENSE file for copyright and license details.
4 * dynamic window manager is designed like any other X client as well. It is
5 * driven through handling X events. In contrast to other X clients, a window
6 * manager selects for SubstructureRedirectMask on the root window, to receive
7 * events about window (dis-)appearance. Only one X connection at a time is
8 * allowed to select for this event mask.
10 * The event handlers of dwm are organized in an array which is accessed
11 * whenever a new event has been fetched. This allows event dispatching
14 * Each child of the root window is called a client, except windows which have
15 * set the override_redirect flag. Clients are organized in a global
16 * linked client list, the focus history is remembered through a global
17 * stack list. Each client contains a bit array to indicate the tags of a
20 * Keys and tagging rules are organized as arrays and defined in config.h.
22 * To understand everything else, start reading main().
32 #include <sys/types.h>
34 #include <X11/cursorfont.h>
35 #include <X11/keysym.h>
36 #include <X11/Xatom.h>
38 #include <X11/Xproto.h>
39 #include <X11/Xutil.h>
41 #include <X11/extensions/Xinerama.h>
45 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
46 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
47 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
48 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
49 #define LENGTH(X) (sizeof X / sizeof X[0])
50 #define MAX(A, B) ((A) > (B) ? (A) : (B))
51 #define MIN(A, B) ((A) < (B) ? (A) : (B))
52 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
54 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
55 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
56 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
77 void (*func)(const Arg *arg);
81 typedef struct Monitor Monitor;
82 typedef struct Client Client;
87 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
90 Bool isfixed, isfloating, isurgent;
99 unsigned long norm[ColLast];
100 unsigned long sel[ColLast];
110 } DC; /* draw context */
115 void (*func)(const Arg *);
121 void (*arrange)(Monitor *);
127 int by, btx; /* bar geometry */
128 int mx, my, mw, mh; /* screen size */
129 int wx, wy, ww, wh; /* window area */
130 unsigned int seltags;
132 unsigned int tagset[2];
144 const char *instance;
150 /* function declarations */
151 static void applyrules(Client *c);
152 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
153 static void arrange(void);
154 static void attach(Client *c);
155 static void attachstack(Client *c);
156 static void buttonpress(XEvent *e);
157 static void checkotherwm(void);
158 static void cleanup(void);
159 static void cleanupmons(void);
160 static void clearurgent(Client *c);
161 static void configure(Client *c);
162 static void configurenotify(XEvent *e);
163 static void configurerequest(XEvent *e);
164 static void destroynotify(XEvent *e);
165 static void detach(Client *c);
166 static void detachstack(Client *c);
167 static void die(const char *errstr, ...);
168 static void drawbar(Monitor *m);
169 static void drawbars(void);
170 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
171 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
172 static void enternotify(XEvent *e);
173 static void expose(XEvent *e);
174 static void focus(Client *c);
175 static void focusin(XEvent *e);
176 static void focusstack(const Arg *arg);
177 static Client *getclient(Window w);
178 static unsigned long getcolor(const char *colstr);
179 static Monitor *getmon(Window w);
180 static Monitor *getmonn(unsigned int n);
181 static Monitor *getmonxy(int x, int y);
182 static Bool getrootpointer(int *x, int *y);
183 static long getstate(Window w);
184 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
185 static void grabbuttons(Client *c, Bool focused);
186 static void grabkeys(void);
187 static void initfont(const char *fontstr);
188 static Bool isprotodel(Client *c);
189 static void keypress(XEvent *e);
190 static void killclient(const Arg *arg);
191 static void manage(Window w, XWindowAttributes *wa);
192 static void mappingnotify(XEvent *e);
193 static void maprequest(XEvent *e);
194 static void monocle(Monitor *m);
195 static void movemouse(const Arg *arg);
196 static Client *nexttiled(Client *c);
197 static void propertynotify(XEvent *e);
198 static void quit(const Arg *arg);
199 static void resize(Client *c, int x, int y, int w, int h);
200 static void resizemouse(const Arg *arg);
201 static void restack(Monitor *m);
202 static void run(void);
203 static void scan(void);
204 static void sendmon(Client *c, Monitor *m);
205 static void setclientstate(Client *c, long state);
206 static void setlayout(const Arg *arg);
207 static void setmfact(const Arg *arg);
208 static void setup(void);
209 static void showhide(Client *c);
210 static void sigchld(int signal);
211 static void spawn(const Arg *arg);
212 static void tag(const Arg *arg);
213 static int textnw(const char *text, unsigned int len);
214 static void tile(Monitor *);
215 static void togglebar(const Arg *arg);
216 static void togglefloating(const Arg *arg);
217 static void toggletag(const Arg *arg);
218 static void toggleview(const Arg *arg);
219 static void unfocus(Client *c);
220 static void unmanage(Client *c);
221 static void unmapnotify(XEvent *e);
222 static void updategeom(void);
223 static void updatebarpos(Monitor *m);
224 static void updatebars(void);
225 static void updatenumlockmask(void);
226 static void updatesizehints(Client *c);
227 static void updatestatus(void);
228 static void updatetitle(Client *c);
229 static void updatewmhints(Client *c);
230 static void view(const Arg *arg);
231 static int xerror(Display *dpy, XErrorEvent *ee);
232 static int xerrordummy(Display *dpy, XErrorEvent *ee);
233 static int xerrorstart(Display *dpy, XErrorEvent *ee);
234 static void zoom(const Arg *arg);
236 static void focusmon(const Arg *arg);
237 static void tagmon(const Arg *arg);
238 #endif /* XINERAMA */
241 static char stext[256];
243 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
244 static int bh, blw = 0; /* bar geometry */
245 static int (*xerrorxlib)(Display *, XErrorEvent *);
246 static unsigned int numlockmask = 0;
247 static void (*handler[LASTEvent]) (XEvent *) = {
248 [ButtonPress] = buttonpress,
249 [ConfigureRequest] = configurerequest,
250 [ConfigureNotify] = configurenotify,
251 [DestroyNotify] = destroynotify,
252 [EnterNotify] = enternotify,
255 [KeyPress] = keypress,
256 [MappingNotify] = mappingnotify,
257 [MapRequest] = maprequest,
258 [PropertyNotify] = propertynotify,
259 [UnmapNotify] = unmapnotify
261 static Atom wmatom[WMLast], netatom[NetLast];
263 static Bool running = True;
264 static Cursor cursor[CurLast];
267 static Layout *lt[] = { NULL, NULL };
268 static Monitor *mons = NULL, *selmon = NULL;
270 /* configuration, allows nested code to access above variables */
273 /* compile-time check if all tags fit into an unsigned int bit array. */
274 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
276 /* function implementations */
278 applyrules(Client *c) {
281 XClassHint ch = { 0 };
284 c->isfloating = c->tags = 0;
285 if(XGetClassHint(dpy, c->win, &ch)) {
286 for(i = 0; i < LENGTH(rules); i++) {
288 if((!r->title || strstr(c->name, r->title))
289 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
290 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
291 c->isfloating = r->isfloating;
300 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
304 applysizehints(Client *c, int *x, int *y, int *w, int *h) {
307 /* set minimum possible */
315 if(*x + *w + 2 * c->bw < sx)
317 if(*y + *h + 2 * c->bw < sy)
324 if(resizehints || c->isfloating) {
325 /* see last two sentences in ICCCM 4.1.2.3 */
326 baseismin = c->basew == c->minw && c->baseh == c->minh;
328 if(!baseismin) { /* temporarily remove base dimensions */
333 /* adjust for aspect limits */
334 if(c->mina > 0 && c->maxa > 0) {
335 if(c->maxa < (float)*w / *h)
337 else if(c->mina < (float)*h / *w)
341 if(baseismin) { /* increment calculation requires this */
346 /* adjust for increment value */
352 /* restore base dimensions */
356 *w = MAX(*w, c->minw);
357 *h = MAX(*h, c->minh);
360 *w = MIN(*w, c->maxw);
363 *h = MIN(*h, c->maxh);
365 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
372 /* optimise two loops into one, check focus(NULL) */
373 for(m = mons; m; m = m->next)
376 for(m = mons; m; m = m->next) {
377 if(lt[m->sellt]->arrange)
378 lt[m->sellt]->arrange(m);
385 c->next = c->mon->clients;
390 attachstack(Client *c) {
391 c->snext = c->mon->stack;
396 buttonpress(XEvent *e) {
397 unsigned int i, x, click;
401 XButtonPressedEvent *ev = &e->xbutton;
404 /* focus monitor if necessary */
405 if((m = getmon(ev->window)) && m != selmon) {
406 unfocus(selmon->sel);
410 if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
415 while(ev->x >= x && ++i < LENGTH(tags));
416 if(i < LENGTH(tags)) {
420 else if(ev->x < x + blw)
422 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
423 click = ClkStatusText;
427 else if((c = getclient(ev->window))) {
429 click = ClkClientWin;
432 for(i = 0; i < LENGTH(buttons); i++)
433 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
434 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
435 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
441 xerrorxlib = XSetErrorHandler(xerrorstart);
443 /* this causes an error if some other window manager is running */
444 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
447 die("dwm: another window manager is already running\n");
448 XSetErrorHandler(xerror);
455 Layout foo = { "", NULL };
459 lt[selmon->sellt] = &foo;
461 /* TODO: consider simplifying cleanup code of the stack, perhaps do that in cleanmons() ? */
462 for(m = mons; m; m = m->next)
466 XFreeFontSet(dpy, dc.font.set);
468 XFreeFont(dpy, dc.font.xfont);
469 XUngrabKey(dpy, AnyKey, AnyModifier, root);
470 XFreePixmap(dpy, dc.drawable);
472 XFreeCursor(dpy, cursor[CurNormal]);
473 XFreeCursor(dpy, cursor[CurResize]);
474 XFreeCursor(dpy, cursor[CurMove]);
477 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
486 XUnmapWindow(dpy, mons->barwin);
487 XDestroyWindow(dpy, mons->barwin);
494 clearurgent(Client *c) {
498 if(!(wmh = XGetWMHints(dpy, c->win)))
500 wmh->flags &= ~XUrgencyHint;
501 XSetWMHints(dpy, c->win, wmh);
506 configure(Client *c) {
509 ce.type = ConfigureNotify;
517 ce.border_width = c->bw;
519 ce.override_redirect = False;
520 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
524 configurenotify(XEvent *e) {
526 XConfigureEvent *ev = &e->xconfigure;
528 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
533 XFreePixmap(dpy, dc.drawable);
534 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
536 for(m = mons; m; m = m->next)
537 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
543 configurerequest(XEvent *e) {
546 XConfigureRequestEvent *ev = &e->xconfigurerequest;
549 if((c = getclient(ev->window))) {
550 if(ev->value_mask & CWBorderWidth)
551 c->bw = ev->border_width;
552 else if(c->isfloating || !lt[selmon->sellt]->arrange) {
554 if(ev->value_mask & CWX)
555 c->x = m->mx + ev->x;
556 if(ev->value_mask & CWY)
557 c->y = m->my + ev->y;
558 if(ev->value_mask & CWWidth)
560 if(ev->value_mask & CWHeight)
562 if((c->x - m->mx + c->w) > m->mw && c->isfloating)
563 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
564 if((c->y - m->my + c->h) > m->mh && c->isfloating)
565 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
566 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
569 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
577 wc.width = ev->width;
578 wc.height = ev->height;
579 wc.border_width = ev->border_width;
580 wc.sibling = ev->above;
581 wc.stack_mode = ev->detail;
582 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
588 destroynotify(XEvent *e) {
590 XDestroyWindowEvent *ev = &e->xdestroywindow;
592 if((c = getclient(ev->window)))
600 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
605 detachstack(Client *c) {
608 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
613 die(const char *errstr, ...) {
616 va_start(ap, errstr);
617 vfprintf(stderr, errstr, ap);
623 drawbar(Monitor *m) {
625 unsigned int i, occ = 0, urg = 0;
629 for(c = m->clients; c; c = c->next) {
639 buf[0] = m->screen_number + '0';
642 drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
645 #endif /* XINERAMA */
647 for(i = 0; i < LENGTH(tags); i++) {
648 dc.w = TEXTW(tags[i]);
649 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
650 drawtext(tags[i], col, urg & 1 << i);
651 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
652 occ & 1 << i, urg & 1 << i, col);
657 drawtext(lt[m->sellt]->symbol, dc.norm, False);
662 if(m == selmon) { /* status is only drawn on selected monitor */
669 drawtext(stext, dc.norm, False);
674 if((dc.w = dc.x - x) > bh) {
677 col = m == selmon ? dc.sel : dc.norm;
678 drawtext(m->sel->name, col, False);
679 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
682 drawtext(NULL, dc.norm, False);
684 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
692 for(m = mons; m; m = m->next)
697 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
700 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
702 gcv.foreground = col[invert ? ColBG : ColFG];
703 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
704 x = (dc.font.ascent + dc.font.descent + 2) / 4;
708 r.width = r.height = x + 1;
709 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
712 r.width = r.height = x;
713 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
718 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
720 int i, x, y, h, len, olen;
721 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
723 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
724 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
728 h = dc.font.ascent + dc.font.descent;
729 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
731 /* shorten text if necessary */
732 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
735 memcpy(buf, text, len);
737 for(i = len; i && i > len - 3; buf[--i] = '.');
738 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
740 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
742 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
746 enternotify(XEvent *e) {
749 XCrossingEvent *ev = &e->xcrossing;
751 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
753 if((m = getmon(ev->window)) && m != selmon) {
754 unfocus(selmon->sel);
757 if((c = getclient(ev->window)))
766 XExposeEvent *ev = &e->xexpose;
768 if(ev->count == 0 && (m = getmon(ev->window)))
774 if(!c || !ISVISIBLE(c))
775 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
777 unfocus(selmon->sel);
785 grabbuttons(c, True);
786 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
787 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
790 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
796 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
797 XFocusChangeEvent *ev = &e->xfocus;
799 if(selmon->sel && ev->window != selmon->sel->win)
800 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
805 focusmon(const Arg *arg) {
808 if(!(m = getmonn(arg->ui)) || m == selmon)
810 unfocus(selmon->sel);
814 #endif /* XINERAMA */
817 focusstack(const Arg *arg) {
818 Client *c = NULL, *i;
823 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
825 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
828 for(i = selmon->clients; i != selmon->sel; i = i->next)
832 for(; i; i = i->next)
843 getclient(Window w) {
847 for(m = mons; m; m = m->next)
848 for(c = m->clients; c; c = c->next)
855 getcolor(const char *colstr) {
856 Colormap cmap = DefaultColormap(dpy, screen);
859 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
860 die("error, cannot allocate color '%s'\n", colstr);
870 if(w == root && getrootpointer(&x, &y))
871 return getmonxy(x, y);
872 for(m = mons; m; m = m->next)
875 if((c = getclient(w)))
881 getmonn(unsigned int n) {
885 for(m = mons, i = 0; m && i != n; m = m->next, i++);
890 getmonxy(int x, int y) {
893 for(m = mons; m; m = m->next)
894 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
900 getrootpointer(int *x, int *y) {
904 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
911 unsigned char *p = NULL;
912 unsigned long n, extra;
915 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
916 &real, &format, &n, &extra, (unsigned char **)&p);
917 if(status != Success)
926 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
931 if(!text || size == 0)
934 XGetTextProperty(dpy, w, &name, atom);
937 if(name.encoding == XA_STRING)
938 strncpy(text, (char *)name.value, size - 1);
940 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
942 strncpy(text, *list, size - 1);
943 XFreeStringList(list);
946 text[size - 1] = '\0';
952 grabbuttons(Client *c, Bool focused) {
956 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
957 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
959 for(i = 0; i < LENGTH(buttons); i++)
960 if(buttons[i].click == ClkClientWin)
961 for(j = 0; j < LENGTH(modifiers); j++)
962 XGrabButton(dpy, buttons[i].button,
963 buttons[i].mask | modifiers[j],
964 c->win, False, BUTTONMASK,
965 GrabModeAsync, GrabModeSync, None, None);
967 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
968 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
977 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
980 XUngrabKey(dpy, AnyKey, AnyModifier, root);
981 for(i = 0; i < LENGTH(keys); i++) {
982 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
983 for(j = 0; j < LENGTH(modifiers); j++)
984 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
985 True, GrabModeAsync, GrabModeAsync);
991 initfont(const char *fontstr) {
992 char *def, **missing;
996 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
999 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1000 XFreeStringList(missing);
1003 XFontSetExtents *font_extents;
1004 XFontStruct **xfonts;
1006 dc.font.ascent = dc.font.descent = 0;
1007 font_extents = XExtentsOfFontSet(dc.font.set);
1008 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1009 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
1010 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1011 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1016 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1017 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1018 die("error, cannot load font: '%s'\n", fontstr);
1019 dc.font.ascent = dc.font.xfont->ascent;
1020 dc.font.descent = dc.font.xfont->descent;
1022 dc.font.height = dc.font.ascent + dc.font.descent;
1026 isprotodel(Client *c) {
1031 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1032 for(i = 0; !ret && i < n; i++)
1033 if(protocols[i] == wmatom[WMDelete])
1041 keypress(XEvent *e) {
1047 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1048 for(i = 0; i < LENGTH(keys); i++)
1049 if(keysym == keys[i].keysym
1050 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1052 keys[i].func(&(keys[i].arg));
1056 killclient(const Arg *arg) {
1061 if(isprotodel(selmon->sel)) {
1062 ev.type = ClientMessage;
1063 ev.xclient.window = selmon->sel->win;
1064 ev.xclient.message_type = wmatom[WMProtocols];
1065 ev.xclient.format = 32;
1066 ev.xclient.data.l[0] = wmatom[WMDelete];
1067 ev.xclient.data.l[1] = CurrentTime;
1068 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1071 XKillClient(dpy, selmon->sel->win);
1075 manage(Window w, XWindowAttributes *wa) {
1077 Client *c, *t = NULL;
1078 Window trans = None;
1081 if(!(c = malloc(sizeof(Client))))
1082 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1088 c->x = wa->x + selmon->wx;
1089 c->y = wa->y + selmon->wy;
1092 c->oldbw = wa->border_width;
1093 if(c->w == selmon->mw && c->h == selmon->mh) {
1099 if(c->x + WIDTH(c) > selmon->mx + selmon->mw)
1100 c->x = selmon->mx + selmon->mw - WIDTH(c);
1101 if(c->y + HEIGHT(c) > selmon->my + selmon->mh)
1102 c->y = selmon->my + selmon->mh - HEIGHT(c);
1103 c->x = MAX(c->x, selmon->mx);
1104 /* only fix client y-offset, if the client center might cover the bar */
1105 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1106 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : selmon->my);
1110 wc.border_width = c->bw;
1111 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1112 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1113 configure(c); /* propagates border_width, if size doesn't change */
1115 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1116 grabbuttons(c, False);
1118 if(XGetTransientForHint(dpy, w, &trans))
1119 t = getclient(trans);
1125 c->isfloating = trans != None || c->isfixed;
1127 XRaiseWindow(dpy, c->win);
1130 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1131 XMapWindow(dpy, c->win);
1132 setclientstate(c, NormalState);
1137 mappingnotify(XEvent *e) {
1138 XMappingEvent *ev = &e->xmapping;
1140 XRefreshKeyboardMapping(ev);
1141 if(ev->request == MappingKeyboard)
1146 maprequest(XEvent *e) {
1147 static XWindowAttributes wa;
1148 XMapRequestEvent *ev = &e->xmaprequest;
1150 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1152 if(wa.override_redirect)
1154 if(!getclient(ev->window))
1155 manage(ev->window, &wa);
1159 monocle(Monitor *m) {
1162 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1163 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1167 movemouse(const Arg *arg) {
1168 int x, y, ocx, ocy, nx, ny;
1173 if(!(c = selmon->sel))
1178 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1179 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1181 if(!getrootpointer(&x, &y))
1184 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1186 case ConfigureRequest:
1189 handler[ev.type](&ev);
1192 nx = ocx + (ev.xmotion.x - x);
1193 ny = ocy + (ev.xmotion.y - y);
1194 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1195 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1196 if(abs(selmon->wx - nx) < snap)
1198 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1199 nx = selmon->wx + selmon->ww - WIDTH(c);
1200 if(abs(selmon->wy - ny) < snap)
1202 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1203 ny = selmon->wy + selmon->wh - HEIGHT(c);
1204 if(!c->isfloating && lt[selmon->sellt]->arrange
1205 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1206 togglefloating(NULL);
1208 if(!lt[selmon->sellt]->arrange || c->isfloating)
1209 resize(c, nx, ny, c->w, c->h);
1213 while(ev.type != ButtonRelease);
1214 XUngrabPointer(dpy, CurrentTime);
1215 if((m = getmonxy(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1223 nexttiled(Client *c) {
1224 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1229 propertynotify(XEvent *e) {
1232 XPropertyEvent *ev = &e->xproperty;
1234 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1236 else if(ev->state == PropertyDelete)
1237 return; /* ignore */
1238 else if((c = getclient(ev->window))) {
1241 case XA_WM_TRANSIENT_FOR:
1242 XGetTransientForHint(dpy, c->win, &trans);
1243 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1246 case XA_WM_NORMAL_HINTS:
1254 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1256 if(c == selmon->sel)
1263 quit(const Arg *arg) {
1268 resize(Client *c, int x, int y, int w, int h) {
1271 if(applysizehints(c, &x, &y, &w, &h)) {
1274 c->w = wc.width = w;
1275 c->h = wc.height = h;
1276 wc.border_width = c->bw;
1277 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1284 resizemouse(const Arg *arg) {
1291 if(!(c = selmon->sel))
1296 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1297 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1299 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1301 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1303 case ConfigureRequest:
1306 handler[ev.type](&ev);
1309 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1310 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1312 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1313 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1314 if(!c->isfloating && lt[selmon->sellt]->arrange
1315 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1316 togglefloating(NULL);
1318 if(!lt[selmon->sellt]->arrange || c->isfloating)
1319 resize(c, c->x, c->y, nw, nh);
1323 while(ev.type != ButtonRelease);
1324 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1325 XUngrabPointer(dpy, CurrentTime);
1326 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1327 if((m = getmonxy(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1335 restack(Monitor *m) {
1343 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1344 XRaiseWindow(dpy, m->sel->win);
1345 if(lt[m->sellt]->arrange) {
1346 wc.stack_mode = Below;
1347 wc.sibling = m->barwin;
1348 for(c = m->stack; c; c = c->snext)
1349 if(!c->isfloating && ISVISIBLE(c)) {
1350 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1351 wc.sibling = c->win;
1355 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1362 /* main event loop */
1364 while(running && !XNextEvent(dpy, &ev)) {
1365 if(handler[ev.type])
1366 (handler[ev.type])(&ev); /* call handler */
1372 unsigned int i, num;
1373 Window d1, d2, *wins = NULL;
1374 XWindowAttributes wa;
1376 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1377 for(i = 0; i < num; i++) {
1378 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1379 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1381 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1382 manage(wins[i], &wa);
1384 for(i = 0; i < num; i++) { /* now the transients */
1385 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1387 if(XGetTransientForHint(dpy, wins[i], &d1)
1388 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1389 manage(wins[i], &wa);
1397 sendmon(Client *c, Monitor *m) {
1403 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1411 setclientstate(Client *c, long state) {
1412 long data[] = {state, None};
1414 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1415 PropModeReplace, (unsigned char *)data, 2);
1419 setlayout(const Arg *arg) {
1420 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1423 lt[selmon->sellt] = (Layout *)arg->v;
1430 /* arg > 1.0 will set mfact absolutly */
1432 setmfact(const Arg *arg) {
1435 if(!arg || !lt[selmon->sellt]->arrange)
1437 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1438 if(f < 0.1 || f > 0.9)
1448 XSetWindowAttributes wa;
1451 screen = DefaultScreen(dpy);
1452 root = RootWindow(dpy, screen);
1456 sw = DisplayWidth(dpy, screen);
1457 sh = DisplayHeight(dpy, screen);
1458 bh = dc.h = dc.font.height + 2;
1459 lt[0] = &layouts[0];
1460 lt[1] = &layouts[1 % LENGTH(layouts)];
1464 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1465 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1466 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1467 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1468 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1471 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1472 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1473 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1475 /* init appearance */
1476 dc.norm[ColBorder] = getcolor(normbordercolor);
1477 dc.norm[ColBG] = getcolor(normbgcolor);
1478 dc.norm[ColFG] = getcolor(normfgcolor);
1479 dc.sel[ColBorder] = getcolor(selbordercolor);
1480 dc.sel[ColBG] = getcolor(selbgcolor);
1481 dc.sel[ColFG] = getcolor(selfgcolor);
1482 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1483 dc.gc = XCreateGC(dpy, root, 0, NULL);
1484 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1486 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1489 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1490 w = TEXTW(layouts[i].symbol);
1496 /* EWMH support per view */
1497 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1498 PropModeReplace, (unsigned char *) netatom, NetLast);
1500 /* select for events */
1501 wa.cursor = cursor[CurNormal];
1502 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1503 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1504 |PropertyChangeMask;
1505 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1506 XSelectInput(dpy, root, wa.event_mask);
1512 showhide(Client *c) {
1515 if(ISVISIBLE(c)) { /* show clients top down */
1516 XMoveWindow(dpy, c->win, c->x, c->y);
1517 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1518 resize(c, c->x, c->y, c->w, c->h);
1521 else { /* hide clients bottom up */
1523 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1529 sigchld(int signal) {
1530 while(0 < waitpid(-1, NULL, WNOHANG));
1534 spawn(const Arg *arg) {
1535 signal(SIGCHLD, sigchld);
1538 close(ConnectionNumber(dpy));
1540 execvp(((char **)arg->v)[0], (char **)arg->v);
1541 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1548 tag(const Arg *arg) {
1549 if(selmon->sel && arg->ui & TAGMASK) {
1550 selmon->sel->tags = arg->ui & TAGMASK;
1557 tagmon(const Arg *arg) {
1560 if(!selmon->sel || !(m = getmonn(arg->ui)))
1562 sendmon(selmon->sel, m);
1564 #endif /* XINERAMA */
1567 textnw(const char *text, unsigned int len) {
1571 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1574 return XTextWidth(dc.font.xfont, text, len);
1583 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1588 c = nexttiled(m->clients);
1589 mw = m->mfact * m->ww;
1590 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1596 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1598 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1603 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1604 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1605 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1607 y = c->y + HEIGHT(c);
1612 togglebar(const Arg *arg) {
1613 selmon->showbar = !selmon->showbar;
1614 updatebarpos(selmon);
1615 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1620 togglefloating(const Arg *arg) {
1623 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1624 if(selmon->sel->isfloating)
1625 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1630 toggletag(const Arg *arg) {
1636 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1638 selmon->sel->tags = mask;
1644 toggleview(const Arg *arg) {
1645 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1648 selmon->tagset[selmon->seltags] = mask;
1654 unfocus(Client *c) {
1657 grabbuttons(c, False);
1658 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1659 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1663 unmanage(Client *c) {
1666 wc.border_width = c->oldbw;
1667 /* The server grab construct avoids race conditions. */
1669 XSetErrorHandler(xerrordummy);
1670 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1673 if(c->mon->sel == c) {
1674 /* TODO: consider separate the next code into a function or into detachstack? */
1676 for(tc = c->mon->stack; tc && !ISVISIBLE(tc); tc = tc->snext);
1680 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1681 setclientstate(c, WithdrawnState);
1684 XSetErrorHandler(xerror);
1690 unmapnotify(XEvent *e) {
1692 XUnmapEvent *ev = &e->xunmap;
1694 if((c = getclient(ev->window)))
1701 XSetWindowAttributes wa;
1703 wa.override_redirect = True;
1704 wa.background_pixmap = ParentRelative;
1705 wa.event_mask = ButtonPressMask|ExposureMask;
1707 for(m = mons; m; m = m->next) {
1708 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1710 CopyFromParent, DefaultVisual(dpy, screen),
1711 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1712 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1713 XMapRaised(dpy, m->barwin);
1718 updatebarpos(Monitor *m) {
1723 m->by = m->topbar ? m->wy : m->wy + m->wh;
1724 m->wy = m->topbar ? m->wy + bh : m->wy;
1734 Monitor *newmons = NULL, *m, *tm;
1738 #elif defined(XINERAMA)
1739 XineramaScreenInfo *info = NULL;
1741 if(XineramaIsActive(dpy))
1742 info = XineramaQueryScreens(dpy, &n);
1744 /* allocate monitor(s) for the new geometry setup */
1745 for(i = 0; i < n; i++) {
1746 m = (Monitor *)malloc(sizeof(Monitor));
1751 /* initialise monitor(s) */
1755 m->screen_number = 0;
1759 m->mh = m->wh = sh / 2;
1761 m->screen_number = 1;
1763 m->my = m->wy = sy + sh / 2;
1765 m->mh = m->wh = sh / 2;
1768 #elif defined(XINERAMA)
1769 if(XineramaIsActive(dpy)) {
1770 for(i = 0, m = newmons; m; m = m->next, i++) {
1771 m->screen_number = info[i].screen_number;
1772 m->mx = m->wx = info[i].x_org;
1773 m->my = m->wy = info[i].y_org;
1774 m->mw = m->ww = info[i].width;
1775 m->mh = m->wh = info[i].height;
1781 /* default monitor setup */
1783 m->screen_number = 0;
1790 /* bar geometry setup */
1791 for(m = newmons; m; m = m->next) {
1792 /* TODO: consider removing the following values from config.h */
1798 m->tagset[0] = m->tagset[1] = 1;
1800 m->showbar = showbar;
1805 /* reassign left over clients of disappeared monitors */
1806 for(tm = mons; tm; tm = tm->next)
1807 while(tm->clients) {
1809 tm->clients = c->next;
1816 /* select focused monitor */
1819 selmon = getmon(root);
1823 updatenumlockmask(void) {
1825 XModifierKeymap *modmap;
1828 modmap = XGetModifierMapping(dpy);
1829 for(i = 0; i < 8; i++)
1830 for(j = 0; j < modmap->max_keypermod; j++)
1831 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1832 == XKeysymToKeycode(dpy, XK_Num_Lock))
1833 numlockmask = (1 << i);
1834 XFreeModifiermap(modmap);
1838 updatesizehints(Client *c) {
1842 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1843 /* size is uninitialized, ensure that size.flags aren't used */
1845 if(size.flags & PBaseSize) {
1846 c->basew = size.base_width;
1847 c->baseh = size.base_height;
1849 else if(size.flags & PMinSize) {
1850 c->basew = size.min_width;
1851 c->baseh = size.min_height;
1854 c->basew = c->baseh = 0;
1855 if(size.flags & PResizeInc) {
1856 c->incw = size.width_inc;
1857 c->inch = size.height_inc;
1860 c->incw = c->inch = 0;
1861 if(size.flags & PMaxSize) {
1862 c->maxw = size.max_width;
1863 c->maxh = size.max_height;
1866 c->maxw = c->maxh = 0;
1867 if(size.flags & PMinSize) {
1868 c->minw = size.min_width;
1869 c->minh = size.min_height;
1871 else if(size.flags & PBaseSize) {
1872 c->minw = size.base_width;
1873 c->minh = size.base_height;
1876 c->minw = c->minh = 0;
1877 if(size.flags & PAspect) {
1878 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1879 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1882 c->maxa = c->mina = 0.0;
1883 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1884 && c->maxw == c->minw && c->maxh == c->minh);
1888 updatetitle(Client *c) {
1889 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1890 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1894 updatestatus(void) {
1895 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1896 strcpy(stext, "dwm-"VERSION);
1901 updatewmhints(Client *c) {
1904 if((wmh = XGetWMHints(dpy, c->win))) {
1905 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1906 wmh->flags &= ~XUrgencyHint;
1907 XSetWMHints(dpy, c->win, wmh);
1910 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1917 view(const Arg *arg) {
1918 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1920 selmon->seltags ^= 1; /* toggle sel tagset */
1921 if(arg->ui & TAGMASK)
1922 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1926 /* There's no way to check accesses to destroyed windows, thus those cases are
1927 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1928 * default error handler, which may call exit. */
1930 xerror(Display *dpy, XErrorEvent *ee) {
1931 if(ee->error_code == BadWindow
1932 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1933 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1934 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1935 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1936 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1937 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1938 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1939 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1941 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1942 ee->request_code, ee->error_code);
1943 return xerrorxlib(dpy, ee); /* may call exit */
1947 xerrordummy(Display *dpy, XErrorEvent *ee) {
1951 /* Startup Error handler to check if another window manager
1952 * is already running. */
1954 xerrorstart(Display *dpy, XErrorEvent *ee) {
1960 zoom(const Arg *arg) {
1961 Client *c = selmon->sel;
1963 if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1965 if(c == nexttiled(selmon->clients))
1966 if(!c || !(c = nexttiled(c->next)))
1975 main(int argc, char *argv[]) {
1976 if(argc == 2 && !strcmp("-v", argv[1]))
1977 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1979 die("usage: dwm [-v]\n");
1981 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1982 fputs("warning: no locale support\n", stderr);
1984 if(!(dpy = XOpenDisplay(NULL)))
1985 die("dwm: cannot open display\n");