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1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a global
15 * linked client list, the focus history is remembered through a global
16 * stack list. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(x) (x->tags & tagset[seltags])
48 #define LENGTH(x) (sizeof x / sizeof x[0])
49 #define MAX(a, b) ((a) > (b) ? (a) : (b))
50 #define MIN(a, b) ((a) < (b) ? (a) : (b))
51 #define MAXTAGLEN 16
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)
57
58 /* enums */
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 */
65
66 typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 void *v;
71 } Arg;
72
73 typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79 } Button;
80
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Window win;
93 };
94
95 typedef struct {
96 int x, y, w, h;
97 unsigned long norm[ColLast];
98 unsigned long sel[ColLast];
99 Drawable drawable;
100 GC gc;
101 struct {
102 int ascent;
103 int descent;
104 int height;
105 XFontSet set;
106 XFontStruct *xfont;
107 } font;
108 } DC; /* draw context */
109
110 typedef struct {
111 unsigned int mod;
112 KeySym keysym;
113 void (*func)(const Arg *);
114 const Arg arg;
115 } Key;
116
117 typedef struct {
118 const char *symbol;
119 void (*arrange)(void);
120 } Layout;
121
122 typedef struct {
123 const char *class;
124 const char *instance;
125 const char *title;
126 unsigned int tags;
127 Bool isfloating;
128 } Rule;
129
130 /* function declarations */
131 static void adjustborder(Client *c, unsigned int bw);
132 static void applyrules(Client *c);
133 static void arrange(void);
134 static void attach(Client *c);
135 static void attachstack(Client *c);
136 static void buttonpress(XEvent *e);
137 static void checkotherwm(void);
138 static void cleanup(void);
139 static void clearurgent(Client *c);
140 static void configure(Client *c);
141 static void configurenotify(XEvent *e);
142 static void configurerequest(XEvent *e);
143 static void destroynotify(XEvent *e);
144 static void detach(Client *c);
145 static void detachstack(Client *c);
146 static void die(const char *errstr, ...);
147 static void drawbar(void);
148 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
150 static void enternotify(XEvent *e);
151 static void expose(XEvent *e);
152 static void focus(Client *c);
153 static void focusin(XEvent *e);
154 static void focusstack(const Arg *arg);
155 static Client *getclient(Window w);
156 static unsigned long getcolor(const char *colstr);
157 static long getstate(Window w);
158 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
159 static void grabbuttons(Client *c, Bool focused);
160 static void grabkeys(void);
161 static void initfont(const char *fontstr);
162 static Bool isprotodel(Client *c);
163 static void keypress(XEvent *e);
164 static void killclient(const Arg *arg);
165 static void manage(Window w, XWindowAttributes *wa);
166 static void mappingnotify(XEvent *e);
167 static void maprequest(XEvent *e);
168 static void monocle(void);
169 static void movemouse(const Arg *arg);
170 static Client *nexttiled(Client *c);
171 static void propertynotify(XEvent *e);
172 static void quit(const Arg *arg);
173 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174 static void resizemouse(const Arg *arg);
175 static void restack(void);
176 static void run(void);
177 static void scan(void);
178 static void setclientstate(Client *c, long state);
179 static void setlayout(const Arg *arg);
180 static void setmfact(const Arg *arg);
181 static void setup(void);
182 static void showhide(Client *c, unsigned int ntiled);
183 static void sigchld(int signal);
184 static void spawn(const Arg *arg);
185 static void tag(const Arg *arg);
186 static int textnw(const char *text, unsigned int len);
187 static void tile(void);
188 static void togglebar(const Arg *arg);
189 static void togglefloating(const Arg *arg);
190 static void toggletag(const Arg *arg);
191 static void toggleview(const Arg *arg);
192 static void unmanage(Client *c);
193 static void unmapnotify(XEvent *e);
194 static void updatebar(void);
195 static void updategeom(void);
196 static void updatenumlockmask(void);
197 static void updatesizehints(Client *c);
198 static void updatestatus(void);
199 static void updatetitle(Client *c);
200 static void updatewmhints(Client *c);
201 static void view(const Arg *arg);
202 static int xerror(Display *dpy, XErrorEvent *ee);
203 static int xerrordummy(Display *dpy, XErrorEvent *ee);
204 static int xerrorstart(Display *dpy, XErrorEvent *ee);
205 static void zoom(const Arg *arg);
206
207 /* variables */
208 static char stext[256];
209 static int screen;
210 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
211 static int by, bh, blw; /* bar geometry y, height and layout symbol width */
212 static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
213 static unsigned int seltags = 0, sellt = 0;
214 static int (*xerrorxlib)(Display *, XErrorEvent *);
215 static unsigned int numlockmask = 0;
216 static void (*handler[LASTEvent]) (XEvent *) = {
217 [ButtonPress] = buttonpress,
218 [ConfigureRequest] = configurerequest,
219 [ConfigureNotify] = configurenotify,
220 [DestroyNotify] = destroynotify,
221 [EnterNotify] = enternotify,
222 [Expose] = expose,
223 [FocusIn] = focusin,
224 [KeyPress] = keypress,
225 [MappingNotify] = mappingnotify,
226 [MapRequest] = maprequest,
227 [PropertyNotify] = propertynotify,
228 [UnmapNotify] = unmapnotify
229 };
230 static Atom wmatom[WMLast], netatom[NetLast];
231 static Bool otherwm;
232 static Bool running = True;
233 static Client *clients = NULL;
234 static Client *sel = NULL;
235 static Client *stack = NULL;
236 static Cursor cursor[CurLast];
237 static Display *dpy;
238 static DC dc;
239 static Layout *lt[] = { NULL, NULL };
240 static Window root, barwin;
241 /* configuration, allows nested code to access above variables */
242 #include "config.h"
243
244 /* compile-time check if all tags fit into an unsigned int bit array. */
245 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
246
247 /* function implementations */
248 void
249 adjustborder(Client *c, unsigned int bw) {
250 XWindowChanges wc;
251
252 if(c->bw != bw) {
253 c->bw = wc.border_width = bw;
254 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
255 }
256 }
257
258 void
259 applyrules(Client *c) {
260 unsigned int i;
261 Rule *r;
262 XClassHint ch = { 0 };
263
264 /* rule matching */
265 if(XGetClassHint(dpy, c->win, &ch)) {
266 for(i = 0; i < LENGTH(rules); i++) {
267 r = &rules[i];
268 if((!r->title || strstr(c->name, r->title))
269 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
270 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
271 c->isfloating = r->isfloating;
272 c->tags |= r->tags & TAGMASK ? r->tags & TAGMASK : tagset[seltags];
273 }
274 }
275 if(ch.res_class)
276 XFree(ch.res_class);
277 if(ch.res_name)
278 XFree(ch.res_name);
279 }
280 if(!c->tags)
281 c->tags = tagset[seltags];
282 }
283
284 void
285 arrange(void) {
286 unsigned int nt;
287 Client *c;
288
289 for(nt = 0, c = nexttiled(clients); c; c = nexttiled(c->next), nt++);
290 showhide(stack, nt);
291 focus(NULL);
292 if(lt[sellt]->arrange)
293 lt[sellt]->arrange();
294 restack();
295 }
296
297 void
298 attach(Client *c) {
299 c->next = clients;
300 clients = c;
301 }
302
303 void
304 attachstack(Client *c) {
305 c->snext = stack;
306 stack = c;
307 }
308
309 void
310 buttonpress(XEvent *e) {
311 unsigned int i, x, click;
312 Arg arg = {0};
313 Client *c;
314 XButtonPressedEvent *ev = &e->xbutton;
315
316 click = ClkRootWin;
317 if(ev->window == barwin) {
318 i = x = 0;
319 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
320 if(i < LENGTH(tags)) {
321 click = ClkTagBar;
322 arg.ui = 1 << i;
323 }
324 else if(ev->x < x + blw)
325 click = ClkLtSymbol;
326 else if(ev->x > wx + ww - TEXTW(stext))
327 click = ClkStatusText;
328 else
329 click = ClkWinTitle;
330 }
331 else if((c = getclient(ev->window))) {
332 focus(c);
333 click = ClkClientWin;
334 }
335
336 for(i = 0; i < LENGTH(buttons); i++)
337 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
338 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
339 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
340 }
341
342 void
343 checkotherwm(void) {
344 otherwm = False;
345 xerrorxlib = XSetErrorHandler(xerrorstart);
346
347 /* this causes an error if some other window manager is running */
348 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
349 XSync(dpy, False);
350 if(otherwm)
351 die("dwm: another window manager is already running\n");
352 XSetErrorHandler(xerror);
353 XSync(dpy, False);
354 }
355
356 void
357 cleanup(void) {
358 Arg a = {.ui = ~0};
359 Layout foo = { "", NULL };
360
361 view(&a);
362 lt[sellt] = &foo;
363 while(stack)
364 unmanage(stack);
365 if(dc.font.set)
366 XFreeFontSet(dpy, dc.font.set);
367 else
368 XFreeFont(dpy, dc.font.xfont);
369 XUngrabKey(dpy, AnyKey, AnyModifier, root);
370 XFreePixmap(dpy, dc.drawable);
371 XFreeGC(dpy, dc.gc);
372 XFreeCursor(dpy, cursor[CurNormal]);
373 XFreeCursor(dpy, cursor[CurResize]);
374 XFreeCursor(dpy, cursor[CurMove]);
375 XDestroyWindow(dpy, barwin);
376 XSync(dpy, False);
377 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
378 }
379
380 void
381 clearurgent(Client *c) {
382 XWMHints *wmh;
383
384 c->isurgent = False;
385 if(!(wmh = XGetWMHints(dpy, c->win)))
386 return;
387 wmh->flags &= ~XUrgencyHint;
388 XSetWMHints(dpy, c->win, wmh);
389 XFree(wmh);
390 }
391
392 void
393 configure(Client *c) {
394 XConfigureEvent ce;
395
396 ce.type = ConfigureNotify;
397 ce.display = dpy;
398 ce.event = c->win;
399 ce.window = c->win;
400 ce.x = c->x;
401 ce.y = c->y;
402 ce.width = c->w;
403 ce.height = c->h;
404 ce.border_width = c->bw;
405 ce.above = None;
406 ce.override_redirect = False;
407 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
408 }
409
410 void
411 configurenotify(XEvent *e) {
412 XConfigureEvent *ev = &e->xconfigure;
413
414 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
415 sw = ev->width;
416 sh = ev->height;
417 updategeom();
418 updatebar();
419 arrange();
420 }
421 }
422
423 void
424 configurerequest(XEvent *e) {
425 Client *c;
426 XConfigureRequestEvent *ev = &e->xconfigurerequest;
427 XWindowChanges wc;
428
429 if((c = getclient(ev->window))) {
430 if(ev->value_mask & CWBorderWidth)
431 c->bw = ev->border_width;
432 else if(c->isfloating || !lt[sellt]->arrange) {
433 if(ev->value_mask & CWX)
434 c->x = sx + ev->x;
435 if(ev->value_mask & CWY)
436 c->y = sy + ev->y;
437 if(ev->value_mask & CWWidth)
438 c->w = ev->width;
439 if(ev->value_mask & CWHeight)
440 c->h = ev->height;
441 if((c->x - sx + c->w) > sw && c->isfloating)
442 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
443 if((c->y - sy + c->h) > sh && c->isfloating)
444 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
445 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
446 configure(c);
447 if(ISVISIBLE(c))
448 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
449 }
450 else
451 configure(c);
452 }
453 else {
454 wc.x = ev->x;
455 wc.y = ev->y;
456 wc.width = ev->width;
457 wc.height = ev->height;
458 wc.border_width = ev->border_width;
459 wc.sibling = ev->above;
460 wc.stack_mode = ev->detail;
461 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
462 }
463 XSync(dpy, False);
464 }
465
466 void
467 destroynotify(XEvent *e) {
468 Client *c;
469 XDestroyWindowEvent *ev = &e->xdestroywindow;
470
471 if((c = getclient(ev->window)))
472 unmanage(c);
473 }
474
475 void
476 detach(Client *c) {
477 Client **tc;
478
479 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
480 *tc = c->next;
481 }
482
483 void
484 detachstack(Client *c) {
485 Client **tc;
486
487 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
488 *tc = c->snext;
489 }
490
491 void
492 die(const char *errstr, ...) {
493 va_list ap;
494
495 va_start(ap, errstr);
496 vfprintf(stderr, errstr, ap);
497 va_end(ap);
498 exit(EXIT_FAILURE);
499 }
500
501 void
502 drawbar(void) {
503 int x;
504 unsigned int i, occ = 0, urg = 0;
505 unsigned long *col;
506 Client *c;
507
508 for(c = clients; c; c = c->next) {
509 occ |= c->tags;
510 if(c->isurgent)
511 urg |= c->tags;
512 }
513
514 dc.x = 0;
515 for(i = 0; i < LENGTH(tags); i++) {
516 dc.w = TEXTW(tags[i]);
517 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
518 drawtext(tags[i], col, urg & 1 << i);
519 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
520 dc.x += dc.w;
521 }
522 if(blw > 0) {
523 dc.w = blw;
524 drawtext(lt[sellt]->symbol, dc.norm, False);
525 x = dc.x + dc.w;
526 }
527 else
528 x = dc.x;
529 dc.w = TEXTW(stext);
530 dc.x = ww - dc.w;
531 if(dc.x < x) {
532 dc.x = x;
533 dc.w = ww - x;
534 }
535 drawtext(stext, dc.norm, False);
536 if((dc.w = dc.x - x) > bh) {
537 dc.x = x;
538 if(sel) {
539 drawtext(sel->name, dc.sel, False);
540 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
541 }
542 else
543 drawtext(NULL, dc.norm, False);
544 }
545 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
546 XSync(dpy, False);
547 }
548
549 void
550 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
551 int x;
552 XGCValues gcv;
553 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
554
555 gcv.foreground = col[invert ? ColBG : ColFG];
556 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
557 x = (dc.font.ascent + dc.font.descent + 2) / 4;
558 r.x = dc.x + 1;
559 r.y = dc.y + 1;
560 if(filled) {
561 r.width = r.height = x + 1;
562 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
563 }
564 else if(empty) {
565 r.width = r.height = x;
566 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
567 }
568 }
569
570 void
571 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
572 char buf[256];
573 int i, x, y, h, len, olen;
574 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
575
576 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
577 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
578 if(!text)
579 return;
580 olen = strlen(text);
581 h = dc.font.ascent + dc.font.descent;
582 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
583 x = dc.x + (h / 2);
584 /* shorten text if necessary */
585 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
586 if(!len)
587 return;
588 memcpy(buf, text, len);
589 if(len < olen)
590 for(i = len; i && i > len - 3; buf[--i] = '.');
591 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
592 if(dc.font.set)
593 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
594 else
595 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
596 }
597
598 void
599 enternotify(XEvent *e) {
600 Client *c;
601 XCrossingEvent *ev = &e->xcrossing;
602
603 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
604 return;
605 if((c = getclient(ev->window)))
606 focus(c);
607 else
608 focus(NULL);
609 }
610
611 void
612 expose(XEvent *e) {
613 XExposeEvent *ev = &e->xexpose;
614
615 if(ev->count == 0 && (ev->window == barwin))
616 drawbar();
617 }
618
619 void
620 focus(Client *c) {
621 if(!c || !ISVISIBLE(c))
622 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
623 if(sel && sel != c) {
624 grabbuttons(sel, False);
625 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
626 }
627 if(c) {
628 if(c->isurgent)
629 clearurgent(c);
630 detachstack(c);
631 attachstack(c);
632 grabbuttons(c, True);
633 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
634 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
635 }
636 else
637 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
638 sel = c;
639 drawbar();
640 }
641
642 void
643 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
644 XFocusChangeEvent *ev = &e->xfocus;
645
646 if(sel && ev->window != sel->win)
647 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
648 }
649
650 void
651 focusstack(const Arg *arg) {
652 Client *c = NULL, *i;
653
654 if(!sel)
655 return;
656 if (arg->i > 0) {
657 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
658 if(!c)
659 for(c = clients; c && !ISVISIBLE(c); c = c->next);
660 }
661 else {
662 for(i = clients; i != sel; i = i->next)
663 if(ISVISIBLE(i))
664 c = i;
665 if(!c)
666 for(; i; i = i->next)
667 if(ISVISIBLE(i))
668 c = i;
669 }
670 if(c) {
671 focus(c);
672 restack();
673 }
674 }
675
676 Client *
677 getclient(Window w) {
678 Client *c;
679
680 for(c = clients; c && c->win != w; c = c->next);
681 return c;
682 }
683
684 unsigned long
685 getcolor(const char *colstr) {
686 Colormap cmap = DefaultColormap(dpy, screen);
687 XColor color;
688
689 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
690 die("error, cannot allocate color '%s'\n", colstr);
691 return color.pixel;
692 }
693
694 long
695 getstate(Window w) {
696 int format, status;
697 long result = -1;
698 unsigned char *p = NULL;
699 unsigned long n, extra;
700 Atom real;
701
702 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
703 &real, &format, &n, &extra, (unsigned char **)&p);
704 if(status != Success)
705 return -1;
706 if(n != 0)
707 result = *p;
708 XFree(p);
709 return result;
710 }
711
712 Bool
713 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
714 char **list = NULL;
715 int n;
716 XTextProperty name;
717
718 if(!text || size == 0)
719 return False;
720 text[0] = '\0';
721 XGetTextProperty(dpy, w, &name, atom);
722 if(!name.nitems)
723 return False;
724 if(name.encoding == XA_STRING)
725 strncpy(text, (char *)name.value, size - 1);
726 else {
727 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
728 && n > 0 && *list) {
729 strncpy(text, *list, size - 1);
730 XFreeStringList(list);
731 }
732 }
733 text[size - 1] = '\0';
734 XFree(name.value);
735 return True;
736 }
737
738 void
739 grabbuttons(Client *c, Bool focused) {
740 updatenumlockmask();
741 {
742 unsigned int i, j;
743 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
744 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
745 if(focused) {
746 for(i = 0; i < LENGTH(buttons); i++)
747 if(buttons[i].click == ClkClientWin)
748 for(j = 0; j < LENGTH(modifiers); j++)
749 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
750 } else
751 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
752 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
753 }
754 }
755
756 void
757 grabkeys(void) {
758 updatenumlockmask();
759 { /* grab keys */
760 unsigned int i, j;
761 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
762 KeyCode code;
763
764 XUngrabKey(dpy, AnyKey, AnyModifier, root);
765 for(i = 0; i < LENGTH(keys); i++) {
766 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
767 for(j = 0; j < LENGTH(modifiers); j++)
768 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
769 True, GrabModeAsync, GrabModeAsync);
770 }
771 }
772 }
773
774 void
775 initfont(const char *fontstr) {
776 char *def, **missing;
777 int i, n;
778
779 missing = NULL;
780 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
781 if(missing) {
782 while(n--)
783 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
784 XFreeStringList(missing);
785 }
786 if(dc.font.set) {
787 XFontSetExtents *font_extents;
788 XFontStruct **xfonts;
789 char **font_names;
790 dc.font.ascent = dc.font.descent = 0;
791 font_extents = XExtentsOfFontSet(dc.font.set);
792 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
793 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
794 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
795 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
796 xfonts++;
797 }
798 }
799 else {
800 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
801 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
802 die("error, cannot load font: '%s'\n", fontstr);
803 dc.font.ascent = dc.font.xfont->ascent;
804 dc.font.descent = dc.font.xfont->descent;
805 }
806 dc.font.height = dc.font.ascent + dc.font.descent;
807 }
808
809 Bool
810 isprotodel(Client *c) {
811 int i, n;
812 Atom *protocols;
813 Bool ret = False;
814
815 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
816 for(i = 0; !ret && i < n; i++)
817 if(protocols[i] == wmatom[WMDelete])
818 ret = True;
819 XFree(protocols);
820 }
821 return ret;
822 }
823
824 void
825 keypress(XEvent *e) {
826 unsigned int i;
827 KeySym keysym;
828 XKeyEvent *ev;
829
830 ev = &e->xkey;
831 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
832 for(i = 0; i < LENGTH(keys); i++)
833 if(keysym == keys[i].keysym
834 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
835 && keys[i].func)
836 keys[i].func(&(keys[i].arg));
837 }
838
839 void
840 killclient(const Arg *arg) {
841 XEvent ev;
842
843 if(!sel)
844 return;
845 if(isprotodel(sel)) {
846 ev.type = ClientMessage;
847 ev.xclient.window = sel->win;
848 ev.xclient.message_type = wmatom[WMProtocols];
849 ev.xclient.format = 32;
850 ev.xclient.data.l[0] = wmatom[WMDelete];
851 ev.xclient.data.l[1] = CurrentTime;
852 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
853 }
854 else
855 XKillClient(dpy, sel->win);
856 }
857
858 void
859 manage(Window w, XWindowAttributes *wa) {
860 static Client cz;
861 Client *c, *t = NULL;
862 Window trans = None;
863 XWindowChanges wc;
864
865 if(!(c = malloc(sizeof(Client))))
866 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
867 *c = cz;
868 c->win = w;
869
870 /* geometry */
871 c->x = wa->x;
872 c->y = wa->y;
873 c->w = wa->width;
874 c->h = wa->height;
875 c->oldbw = wa->border_width;
876 if(c->w == sw && c->h == sh) {
877 c->x = sx;
878 c->y = sy;
879 c->bw = 0;
880 }
881 else {
882 if(c->x + WIDTH(c) > sx + sw)
883 c->x = sx + sw - WIDTH(c);
884 if(c->y + HEIGHT(c) > sy + sh)
885 c->y = sy + sh - HEIGHT(c);
886 c->x = MAX(c->x, sx);
887 /* only fix client y-offset, if the client center might cover the bar */
888 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
889 c->bw = borderpx;
890 }
891
892 wc.border_width = c->bw;
893 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
894 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
895 configure(c); /* propagates border_width, if size doesn't change */
896 updatesizehints(c);
897 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
898 grabbuttons(c, False);
899 updatetitle(c);
900 if(XGetTransientForHint(dpy, w, &trans))
901 t = getclient(trans);
902 if(t)
903 c->tags = t->tags;
904 else
905 applyrules(c);
906 if(!c->isfloating)
907 c->isfloating = trans != None || c->isfixed;
908 if(c->isfloating)
909 XRaiseWindow(dpy, c->win);
910 attach(c);
911 attachstack(c);
912 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
913 XMapWindow(dpy, c->win);
914 setclientstate(c, NormalState);
915 arrange();
916 }
917
918 void
919 mappingnotify(XEvent *e) {
920 XMappingEvent *ev = &e->xmapping;
921
922 XRefreshKeyboardMapping(ev);
923 if(ev->request == MappingKeyboard)
924 grabkeys();
925 }
926
927 void
928 maprequest(XEvent *e) {
929 static XWindowAttributes wa;
930 XMapRequestEvent *ev = &e->xmaprequest;
931
932 if(!XGetWindowAttributes(dpy, ev->window, &wa))
933 return;
934 if(wa.override_redirect)
935 return;
936 if(!getclient(ev->window))
937 manage(ev->window, &wa);
938 }
939
940 void
941 monocle(void) {
942 unsigned int n;
943 Client *c;
944
945 for(n = 0, c = nexttiled(clients); c && n < 2; c = nexttiled(c->next), n++);
946 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
947 adjustborder(c, n == 1 ? 0 : borderpx);
948 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
949 }
950 }
951
952 void
953 movemouse(const Arg *arg) {
954 int x, y, ocx, ocy, di, nx, ny;
955 unsigned int dui;
956 Client *c;
957 Window dummy;
958 XEvent ev;
959
960 if(!(c = sel))
961 return;
962 restack();
963 ocx = c->x;
964 ocy = c->y;
965 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
966 None, cursor[CurMove], CurrentTime) != GrabSuccess)
967 return;
968 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
969 if(usegrab)
970 XGrabServer(dpy);
971 do {
972 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
973 switch (ev.type) {
974 case ConfigureRequest:
975 case Expose:
976 case MapRequest:
977 handler[ev.type](&ev);
978 break;
979 case MotionNotify:
980 nx = ocx + (ev.xmotion.x - x);
981 ny = ocy + (ev.xmotion.y - y);
982 if(snap && nx >= wx && nx <= wx + ww
983 && ny >= wy && ny <= wy + wh) {
984 if(abs(wx - nx) < snap)
985 nx = wx;
986 else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
987 nx = wx + ww - WIDTH(c);
988 if(abs(wy - ny) < snap)
989 ny = wy;
990 else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
991 ny = wy + wh - HEIGHT(c);
992 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
993 togglefloating(NULL);
994 }
995 if(!lt[sellt]->arrange || c->isfloating)
996 resize(c, nx, ny, c->w, c->h, False);
997 break;
998 }
999 }
1000 while(ev.type != ButtonRelease);
1001 if(usegrab)
1002 XUngrabServer(dpy);
1003 XUngrabPointer(dpy, CurrentTime);
1004 }
1005
1006 Client *
1007 nexttiled(Client *c) {
1008 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1009 return c;
1010 }
1011
1012 void
1013 propertynotify(XEvent *e) {
1014 Client *c;
1015 Window trans;
1016 XPropertyEvent *ev = &e->xproperty;
1017
1018 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1019 updatestatus();
1020 else if(ev->state == PropertyDelete)
1021 return; /* ignore */
1022 else if((c = getclient(ev->window))) {
1023 switch (ev->atom) {
1024 default: break;
1025 case XA_WM_TRANSIENT_FOR:
1026 XGetTransientForHint(dpy, c->win, &trans);
1027 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1028 arrange();
1029 break;
1030 case XA_WM_NORMAL_HINTS:
1031 updatesizehints(c);
1032 break;
1033 case XA_WM_HINTS:
1034 updatewmhints(c);
1035 drawbar();
1036 break;
1037 }
1038 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1039 updatetitle(c);
1040 if(c == sel)
1041 drawbar();
1042 }
1043 }
1044 }
1045
1046 void
1047 quit(const Arg *arg) {
1048 running = False;
1049 }
1050
1051 void
1052 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1053 XWindowChanges wc;
1054
1055 if(sizehints) {
1056 /* see last two sentences in ICCCM 4.1.2.3 */
1057 Bool baseismin = c->basew == c->minw && c->baseh == c->minh;
1058
1059 /* set minimum possible */
1060 w = MAX(1, w);
1061 h = MAX(1, h);
1062
1063 if(!baseismin) { /* temporarily remove base dimensions */
1064 w -= c->basew;
1065 h -= c->baseh;
1066 }
1067
1068 /* adjust for aspect limits */
1069 if(c->mina > 0 && c->maxa > 0) {
1070 if(c->maxa < (float)w / h)
1071 w = h * c->maxa;
1072 else if(c->mina < (float)h / w)
1073 h = w * c->mina;
1074 }
1075
1076 if(baseismin) { /* increment calculation requires this */
1077 w -= c->basew;
1078 h -= c->baseh;
1079 }
1080
1081 /* adjust for increment value */
1082 if(c->incw)
1083 w -= w % c->incw;
1084 if(c->inch)
1085 h -= h % c->inch;
1086
1087 /* restore base dimensions */
1088 w += c->basew;
1089 h += c->baseh;
1090
1091 w = MAX(w, c->minw);
1092 h = MAX(h, c->minh);
1093
1094 if(c->maxw)
1095 w = MIN(w, c->maxw);
1096
1097 if(c->maxh)
1098 h = MIN(h, c->maxh);
1099 }
1100 if(w <= 0 || h <= 0)
1101 return;
1102 if(x > sx + sw)
1103 x = sw - WIDTH(c);
1104 if(y > sy + sh)
1105 y = sh - HEIGHT(c);
1106 if(x + w + 2 * c->bw < sx)
1107 x = sx;
1108 if(y + h + 2 * c->bw < sy)
1109 y = sy;
1110 if(h < bh)
1111 h = bh;
1112 if(w < bh)
1113 w = bh;
1114 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1115 c->x = wc.x = x;
1116 c->y = wc.y = y;
1117 c->w = wc.width = w;
1118 c->h = wc.height = h;
1119 wc.border_width = c->bw;
1120 XConfigureWindow(dpy, c->win,
1121 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1122 configure(c);
1123 XSync(dpy, False);
1124 }
1125 }
1126
1127 void
1128 resizemouse(const Arg *arg) {
1129 int ocx, ocy;
1130 int nw, nh;
1131 Client *c;
1132 XEvent ev;
1133
1134 if(!(c = sel))
1135 return;
1136 restack();
1137 ocx = c->x;
1138 ocy = c->y;
1139 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1140 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1141 return;
1142 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1143 if(usegrab)
1144 XGrabServer(dpy);
1145 do {
1146 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1147 switch(ev.type) {
1148 case ConfigureRequest:
1149 case Expose:
1150 case MapRequest:
1151 handler[ev.type](&ev);
1152 break;
1153 case MotionNotify:
1154 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1155 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1156
1157 if(snap && nw >= wx && nw <= wx + ww
1158 && nh >= wy && nh <= wy + wh) {
1159 if(!c->isfloating && lt[sellt]->arrange
1160 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1161 togglefloating(NULL);
1162 }
1163 if(!lt[sellt]->arrange || c->isfloating)
1164 resize(c, c->x, c->y, nw, nh, True);
1165 break;
1166 }
1167 }
1168 while(ev.type != ButtonRelease);
1169 if(usegrab)
1170 XUngrabServer(dpy);
1171 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1172 XUngrabPointer(dpy, CurrentTime);
1173 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1174 }
1175
1176 void
1177 restack(void) {
1178 Client *c;
1179 XEvent ev;
1180 XWindowChanges wc;
1181
1182 drawbar();
1183 if(!sel)
1184 return;
1185 if(sel->isfloating || !lt[sellt]->arrange)
1186 XRaiseWindow(dpy, sel->win);
1187 if(lt[sellt]->arrange) {
1188 wc.stack_mode = Below;
1189 wc.sibling = barwin;
1190 for(c = stack; c; c = c->snext)
1191 if(!c->isfloating && ISVISIBLE(c)) {
1192 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1193 wc.sibling = c->win;
1194 }
1195 }
1196 XSync(dpy, False);
1197 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1198 }
1199
1200 void
1201 run(void) {
1202 XEvent ev;
1203
1204 /* main event loop */
1205 XSync(dpy, False);
1206 while(running && !XNextEvent(dpy, &ev)) {
1207 if(handler[ev.type])
1208 (handler[ev.type])(&ev); /* call handler */
1209 }
1210 }
1211
1212 void
1213 scan(void) {
1214 unsigned int i, num;
1215 Window d1, d2, *wins = NULL;
1216 XWindowAttributes wa;
1217
1218 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1219 for(i = 0; i < num; i++) {
1220 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1221 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1222 continue;
1223 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1224 manage(wins[i], &wa);
1225 }
1226 for(i = 0; i < num; i++) { /* now the transients */
1227 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1228 continue;
1229 if(XGetTransientForHint(dpy, wins[i], &d1)
1230 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1231 manage(wins[i], &wa);
1232 }
1233 if(wins)
1234 XFree(wins);
1235 }
1236 }
1237
1238 void
1239 setclientstate(Client *c, long state) {
1240 long data[] = {state, None};
1241
1242 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1243 PropModeReplace, (unsigned char *)data, 2);
1244 }
1245
1246 void
1247 setlayout(const Arg *arg) {
1248 if(!arg || !arg->v || arg->v != lt[sellt])
1249 sellt ^= 1;
1250 if(arg && arg->v)
1251 lt[sellt] = (Layout *)arg->v;
1252 if(sel)
1253 arrange();
1254 else
1255 drawbar();
1256 }
1257
1258 /* arg > 1.0 will set mfact absolutly */
1259 void
1260 setmfact(const Arg *arg) {
1261 float f;
1262
1263 if(!arg || !lt[sellt]->arrange)
1264 return;
1265 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1266 if(f < 0.1 || f > 0.9)
1267 return;
1268 mfact = f;
1269 arrange();
1270 }
1271
1272 void
1273 setup(void) {
1274 unsigned int i;
1275 int w;
1276 XSetWindowAttributes wa;
1277
1278 /* init screen */
1279 screen = DefaultScreen(dpy);
1280 root = RootWindow(dpy, screen);
1281 initfont(font);
1282 sx = 0;
1283 sy = 0;
1284 sw = DisplayWidth(dpy, screen);
1285 sh = DisplayHeight(dpy, screen);
1286 bh = dc.h = dc.font.height + 2;
1287 lt[0] = &layouts[0];
1288 lt[1] = &layouts[1 % LENGTH(layouts)];
1289 updategeom();
1290
1291 /* init atoms */
1292 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1293 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1294 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1295 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1296 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1297
1298 /* init cursors */
1299 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1300 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1301 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1302
1303 /* init appearance */
1304 dc.norm[ColBorder] = getcolor(normbordercolor);
1305 dc.norm[ColBG] = getcolor(normbgcolor);
1306 dc.norm[ColFG] = getcolor(normfgcolor);
1307 dc.sel[ColBorder] = getcolor(selbordercolor);
1308 dc.sel[ColBG] = getcolor(selbgcolor);
1309 dc.sel[ColFG] = getcolor(selfgcolor);
1310 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1311 dc.gc = XCreateGC(dpy, root, 0, 0);
1312 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1313 if(!dc.font.set)
1314 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1315
1316 /* init bar */
1317 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1318 w = TEXTW(layouts[i].symbol);
1319 blw = MAX(blw, w);
1320 }
1321
1322 wa.override_redirect = 1;
1323 wa.background_pixmap = ParentRelative;
1324 wa.event_mask = ButtonPressMask|ExposureMask;
1325
1326 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1327 CopyFromParent, DefaultVisual(dpy, screen),
1328 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1329 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1330 XMapRaised(dpy, barwin);
1331 updatestatus();
1332
1333 /* EWMH support per view */
1334 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1335 PropModeReplace, (unsigned char *) netatom, NetLast);
1336
1337 /* select for events */
1338 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1339 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1340 |PropertyChangeMask;
1341 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1342 XSelectInput(dpy, root, wa.event_mask);
1343
1344 grabkeys();
1345 }
1346
1347 void
1348 showhide(Client *c, unsigned int ntiled) {
1349 if(!c)
1350 return;
1351 if(ISVISIBLE(c)) { /* show clients top down */
1352 if(c->isfloating || ntiled > 1) /* avoid unnecessary border reverts */
1353 adjustborder(c, borderpx);
1354 XMoveWindow(dpy, c->win, c->x, c->y);
1355 if(!lt[sellt]->arrange || c->isfloating)
1356 resize(c, c->x, c->y, c->w, c->h, True);
1357 showhide(c->snext, ntiled);
1358 }
1359 else { /* hide clients bottom up */
1360 showhide(c->snext, ntiled);
1361 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1362 }
1363 }
1364
1365
1366 void
1367 sigchld(int signal) {
1368 while(0 < waitpid(-1, NULL, WNOHANG));
1369 }
1370
1371 void
1372 spawn(const Arg *arg) {
1373 signal(SIGCHLD, sigchld);
1374 if(fork() == 0) {
1375 if(dpy)
1376 close(ConnectionNumber(dpy));
1377 setsid();
1378 execvp(((char **)arg->v)[0], (char **)arg->v);
1379 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1380 perror(" failed");
1381 exit(0);
1382 }
1383 }
1384
1385 void
1386 tag(const Arg *arg) {
1387 if(sel && arg->ui & TAGMASK) {
1388 sel->tags = arg->ui & TAGMASK;
1389 arrange();
1390 }
1391 }
1392
1393 int
1394 textnw(const char *text, unsigned int len) {
1395 XRectangle r;
1396
1397 if(dc.font.set) {
1398 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1399 return r.width;
1400 }
1401 return XTextWidth(dc.font.xfont, text, len);
1402 }
1403
1404 void
1405 tile(void) {
1406 int x, y, h, w, mw;
1407 unsigned int i, n;
1408 Client *c;
1409
1410 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1411 if(n == 0)
1412 return;
1413
1414 /* master */
1415 c = nexttiled(clients);
1416 mw = mfact * ww;
1417 adjustborder(c, n == 1 ? 0 : borderpx);
1418 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1419
1420 if(--n == 0)
1421 return;
1422
1423 /* tile stack */
1424 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1425 y = wy;
1426 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1427 h = wh / n;
1428 if(h < bh)
1429 h = wh;
1430
1431 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1432 adjustborder(c, borderpx);
1433 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1434 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw), resizehints);
1435 if(h != wh)
1436 y = c->y + HEIGHT(c);
1437 }
1438 }
1439
1440 void
1441 togglebar(const Arg *arg) {
1442 showbar = !showbar;
1443 updategeom();
1444 updatebar();
1445 arrange();
1446 }
1447
1448 void
1449 togglefloating(const Arg *arg) {
1450 if(!sel)
1451 return;
1452 sel->isfloating = !sel->isfloating || sel->isfixed;
1453 if(sel->isfloating)
1454 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1455 arrange();
1456 }
1457
1458 void
1459 toggletag(const Arg *arg) {
1460 unsigned int mask;
1461
1462 if (!sel)
1463 return;
1464
1465 mask = sel->tags ^ (arg->ui & TAGMASK);
1466 if(sel && mask) {
1467 sel->tags = mask;
1468 arrange();
1469 }
1470 }
1471
1472 void
1473 toggleview(const Arg *arg) {
1474 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1475
1476 if(mask) {
1477 tagset[seltags] = mask;
1478 arrange();
1479 }
1480 }
1481
1482 void
1483 unmanage(Client *c) {
1484 XWindowChanges wc;
1485
1486 wc.border_width = c->oldbw;
1487 /* The server grab construct avoids race conditions. */
1488 XGrabServer(dpy);
1489 XSetErrorHandler(xerrordummy);
1490 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1491 detach(c);
1492 detachstack(c);
1493 if(sel == c)
1494 focus(NULL);
1495 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1496 setclientstate(c, WithdrawnState);
1497 free(c);
1498 XSync(dpy, False);
1499 XSetErrorHandler(xerror);
1500 XUngrabServer(dpy);
1501 arrange();
1502 }
1503
1504 void
1505 unmapnotify(XEvent *e) {
1506 Client *c;
1507 XUnmapEvent *ev = &e->xunmap;
1508
1509 if((c = getclient(ev->window)))
1510 unmanage(c);
1511 }
1512
1513 void
1514 updatebar(void) {
1515 if(dc.drawable != 0)
1516 XFreePixmap(dpy, dc.drawable);
1517 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1518 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1519 }
1520
1521 void
1522 updategeom(void) {
1523 #ifdef XINERAMA
1524 int n, i = 0;
1525 XineramaScreenInfo *info = NULL;
1526
1527 /* window area geometry */
1528 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1529 if(n > 1) {
1530 int di, x, y;
1531 unsigned int dui;
1532 Window dummy;
1533 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1534 for(i = 0; i < n; i++)
1535 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1536 break;
1537 }
1538 wx = info[i].x_org;
1539 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1540 ww = info[i].width;
1541 wh = showbar ? info[i].height - bh : info[i].height;
1542 XFree(info);
1543 }
1544 else
1545 #endif
1546 {
1547 wx = sx;
1548 wy = showbar && topbar ? sy + bh : sy;
1549 ww = sw;
1550 wh = showbar ? sh - bh : sh;
1551 }
1552
1553 /* bar position */
1554 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1555 }
1556
1557 void
1558 updatenumlockmask(void) {
1559 unsigned int i, j;
1560 XModifierKeymap *modmap;
1561
1562 numlockmask = 0;
1563 modmap = XGetModifierMapping(dpy);
1564 for(i = 0; i < 8; i++)
1565 for(j = 0; j < modmap->max_keypermod; j++)
1566 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
1567 numlockmask = (1 << i);
1568 XFreeModifiermap(modmap);
1569 }
1570
1571 void
1572 updatesizehints(Client *c) {
1573 long msize;
1574 XSizeHints size;
1575
1576 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1577 /* size is uninitialized, ensure that size.flags aren't used */
1578 size.flags = PSize;
1579 if(size.flags & PBaseSize) {
1580 c->basew = size.base_width;
1581 c->baseh = size.base_height;
1582 }
1583 else if(size.flags & PMinSize) {
1584 c->basew = size.min_width;
1585 c->baseh = size.min_height;
1586 }
1587 else
1588 c->basew = c->baseh = 0;
1589 if(size.flags & PResizeInc) {
1590 c->incw = size.width_inc;
1591 c->inch = size.height_inc;
1592 }
1593 else
1594 c->incw = c->inch = 0;
1595 if(size.flags & PMaxSize) {
1596 c->maxw = size.max_width;
1597 c->maxh = size.max_height;
1598 }
1599 else
1600 c->maxw = c->maxh = 0;
1601 if(size.flags & PMinSize) {
1602 c->minw = size.min_width;
1603 c->minh = size.min_height;
1604 }
1605 else if(size.flags & PBaseSize) {
1606 c->minw = size.base_width;
1607 c->minh = size.base_height;
1608 }
1609 else
1610 c->minw = c->minh = 0;
1611 if(size.flags & PAspect) {
1612 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1613 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1614 }
1615 else
1616 c->maxa = c->mina = 0.0;
1617 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1618 && c->maxw == c->minw && c->maxh == c->minh);
1619 }
1620
1621 void
1622 updatetitle(Client *c) {
1623 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1624 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1625 }
1626
1627 void
1628 updatestatus() {
1629 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1630 strcpy(stext, "dwm-"VERSION);
1631 drawbar();
1632 }
1633
1634 void
1635 updatewmhints(Client *c) {
1636 XWMHints *wmh;
1637
1638 if((wmh = XGetWMHints(dpy, c->win))) {
1639 if(c == sel && wmh->flags & XUrgencyHint) {
1640 wmh->flags &= ~XUrgencyHint;
1641 XSetWMHints(dpy, c->win, wmh);
1642 }
1643 else
1644 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1645
1646 XFree(wmh);
1647 }
1648 }
1649
1650 void
1651 view(const Arg *arg) {
1652 if((arg->ui & TAGMASK) == tagset[seltags])
1653 return;
1654 seltags ^= 1; /* toggle sel tagset */
1655 if(arg->ui & TAGMASK)
1656 tagset[seltags] = arg->ui & TAGMASK;
1657 arrange();
1658 }
1659
1660 /* There's no way to check accesses to destroyed windows, thus those cases are
1661 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1662 * default error handler, which may call exit. */
1663 int
1664 xerror(Display *dpy, XErrorEvent *ee) {
1665 if(ee->error_code == BadWindow
1666 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1667 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1668 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1669 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1670 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1671 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1672 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1673 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1674 return 0;
1675 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1676 ee->request_code, ee->error_code);
1677 return xerrorxlib(dpy, ee); /* may call exit */
1678 }
1679
1680 int
1681 xerrordummy(Display *dpy, XErrorEvent *ee) {
1682 return 0;
1683 }
1684
1685 /* Startup Error handler to check if another window manager
1686 * is already running. */
1687 int
1688 xerrorstart(Display *dpy, XErrorEvent *ee) {
1689 otherwm = True;
1690 return -1;
1691 }
1692
1693 void
1694 zoom(const Arg *arg) {
1695 Client *c = sel;
1696
1697 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1698 return;
1699 if(c == nexttiled(clients))
1700 if(!c || !(c = nexttiled(c->next)))
1701 return;
1702 detach(c);
1703 attach(c);
1704 focus(c);
1705 arrange();
1706 }
1707
1708 int
1709 main(int argc, char *argv[]) {
1710 if(argc == 2 && !strcmp("-v", argv[1]))
1711 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1712 else if(argc != 1)
1713 die("usage: dwm [-v]\n");
1714
1715 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1716 fprintf(stderr, "warning: no locale support\n");
1717
1718 if(!(dpy = XOpenDisplay(0)))
1719 die("dwm: cannot open display\n");
1720
1721 checkotherwm();
1722 setup();
1723 scan();
1724 run();
1725 cleanup();
1726
1727 XCloseDisplay(dpy);
1728 return 0;
1729 }