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[dwm.git] / dwm.c
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 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains a bit array to indicate the tags of a
20 * client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26 #include <errno.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/select.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <X11/cursorfont.h>
37 #include <X11/keysym.h>
38 #include <X11/Xatom.h>
39 #include <X11/Xlib.h>
40 #include <X11/Xproto.h>
41 #include <X11/Xutil.h>
42 #ifdef XINERAMA
43 #include <X11/extensions/Xinerama.h>
44 #endif
45
46 /* macros */
47 #define MAX(a, b) ((a) > (b) ? (a) : (b))
48 #define MIN(a, b) ((a) < (b) ? (a) : (b))
49 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
50 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
51 #define LENGTH(x) (sizeof x / sizeof x[0])
52 #define MAXTAGLEN 16
53 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
54 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55 #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
56 #define ISVISIBLE(x) (x->tags & tagset[seltags])
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, WMName, WMState, WMLast };/* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66 /* typedefs */
67 typedef unsigned int uint;
68 typedef unsigned long ulong;
69
70 typedef union {
71 int i;
72 uint ui;
73 float f;
74 void *v;
75 } Arg;
76
77 typedef struct {
78 uint click;
79 uint mask;
80 uint button;
81 void (*func)(const Arg *arg);
82 const Arg arg;
83 } Button;
84
85 typedef struct Client Client;
86 struct Client {
87 char name[256];
88 float mina, maxa;
89 int x, y, w, h;
90 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
91 int bw, oldbw;
92 uint tags;
93 Bool isfixed, isfloating, isurgent;
94 Client *next;
95 Client *snext;
96 Window win;
97 };
98
99 typedef struct {
100 int x, y, w, h;
101 ulong norm[ColLast];
102 ulong sel[ColLast];
103 Drawable drawable;
104 GC gc;
105 struct {
106 int ascent;
107 int descent;
108 int height;
109 XFontSet set;
110 XFontStruct *xfont;
111 } font;
112 } DC; /* draw context */
113
114 typedef struct {
115 uint mod;
116 KeySym keysym;
117 void (*func)(const Arg *);
118 const Arg arg;
119 } Key;
120
121 typedef struct {
122 const char *symbol;
123 void (*arrange)(void);
124 } Layout;
125
126 typedef struct {
127 const char *class;
128 const char *instance;
129 const char *title;
130 uint tags;
131 Bool isfloating;
132 } Rule;
133
134 /* function declarations */
135 static void applyrules(Client *c);
136 static void arrange(void);
137 static void attach(Client *c);
138 static void attachstack(Client *c);
139 static void buttonpress(XEvent *e);
140 static void checkotherwm(void);
141 static void cleanup(void);
142 static void clearurgent(void);
143 static void configure(Client *c);
144 static void configurenotify(XEvent *e);
145 static void configurerequest(XEvent *e);
146 static void destroynotify(XEvent *e);
147 static void detach(Client *c);
148 static void detachstack(Client *c);
149 static void die(const char *errstr, ...);
150 static void drawbar(void);
151 static void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
152 static void drawtext(const char *text, ulong col[ColLast], Bool invert);
153 static void enternotify(XEvent *e);
154 static void expose(XEvent *e);
155 static void focus(Client *c);
156 static void focusin(XEvent *e);
157 static void focusstack(const Arg *arg);
158 static Client *getclient(Window w);
159 static ulong getcolor(const char *colstr);
160 static long getstate(Window w);
161 static Bool gettextprop(Window w, Atom atom, char *text, uint size);
162 static void grabbuttons(Client *c, Bool focused);
163 static void grabkeys(void);
164 static void initfont(const char *fontstr);
165 static Bool isoccupied(uint t);
166 static Bool isprotodel(Client *c);
167 static Bool isurgent(uint t);
168 static void keypress(XEvent *e);
169 static void killclient(const Arg *arg);
170 static void manage(Window w, XWindowAttributes *wa);
171 static void mappingnotify(XEvent *e);
172 static void maprequest(XEvent *e);
173 static void monocle(void);
174 static void movemouse(const Arg *arg);
175 static Client *nexttiled(Client *c);
176 static void propertynotify(XEvent *e);
177 static void quit(const Arg *arg);
178 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
179 static void resizemouse(const Arg *arg);
180 static void restack(void);
181 static void run(void);
182 static void scan(void);
183 static void setclientstate(Client *c, long state);
184 static void setlayout(const Arg *arg);
185 static void setmfact(const Arg *arg);
186 static void setup(void);
187 static void spawn(const Arg *arg);
188 static void tag(const Arg *arg);
189 static int textnw(const char *text, uint len);
190 static void tile(void);
191 static void togglebar(const Arg *arg);
192 static void togglefloating(const Arg *arg);
193 static void toggletag(const Arg *arg);
194 static void toggleview(const Arg *arg);
195 static void unmanage(Client *c);
196 static void unmapnotify(XEvent *e);
197 static void updatebar(void);
198 static void updategeom(void);
199 static void updatesizehints(Client *c);
200 static void updatetitle(Client *c);
201 static void updatewmhints(Client *c);
202 static void view(const Arg *arg);
203 static int xerror(Display *dpy, XErrorEvent *ee);
204 static int xerrordummy(Display *dpy, XErrorEvent *ee);
205 static int xerrorstart(Display *dpy, XErrorEvent *ee);
206 static void zoom(const Arg *arg);
207
208 /* variables */
209 static char stext[256];
210 static int screen, sx, sy, sw, sh;
211 static int by, bh, blw, wx, wy, ww, wh;
212 static uint seltags = 0, sellt = 0;
213 static int (*xerrorxlib)(Display *, XErrorEvent *);
214 static uint numlockmask = 0;
215 static void (*handler[LASTEvent]) (XEvent *) = {
216 [ButtonPress] = buttonpress,
217 [ConfigureRequest] = configurerequest,
218 [ConfigureNotify] = configurenotify,
219 [DestroyNotify] = destroynotify,
220 [EnterNotify] = enternotify,
221 [Expose] = expose,
222 [FocusIn] = focusin,
223 [KeyPress] = keypress,
224 [MappingNotify] = mappingnotify,
225 [MapRequest] = maprequest,
226 [PropertyNotify] = propertynotify,
227 [UnmapNotify] = unmapnotify
228 };
229 static Atom wmatom[WMLast], netatom[NetLast];
230 static Bool otherwm, readin;
231 static Bool running = True;
232 static uint tagset[] = {1, 1}; /* after start, first tag is selected */
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 = {0};
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 uint bit array. */
245 struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
246
247 /* function implementations */
248 void
249 applyrules(Client *c) {
250 uint i;
251 Rule *r;
252 XClassHint ch = { 0 };
253
254 /* rule matching */
255 XGetClassHint(dpy, c->win, &ch);
256 for(i = 0; i < LENGTH(rules); i++) {
257 r = &rules[i];
258 if((!r->title || strstr(c->name, r->title))
259 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
260 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
261 c->isfloating = r->isfloating;
262 c->tags |= r->tags & TAGMASK;
263 }
264 }
265 if(ch.res_class)
266 XFree(ch.res_class);
267 if(ch.res_name)
268 XFree(ch.res_name);
269 if(!c->tags)
270 c->tags = tagset[seltags];
271 }
272
273 void
274 arrange(void) {
275 Client *c;
276
277 for(c = clients; c; c = c->next)
278 if(ISVISIBLE(c)) {
279 XMoveWindow(dpy, c->win, c->x, c->y);
280 if(!lt[sellt]->arrange || c->isfloating)
281 resize(c, c->x, c->y, c->w, c->h, True);
282 }
283 else {
284 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
285 }
286
287 focus(NULL);
288 if(lt[sellt]->arrange)
289 lt[sellt]->arrange();
290 restack();
291 }
292
293 void
294 attach(Client *c) {
295 c->next = clients;
296 clients = c;
297 }
298
299 void
300 attachstack(Client *c) {
301 c->snext = stack;
302 stack = c;
303 }
304
305 void
306 buttonpress(XEvent *e) {
307 uint i, x, click;
308 Arg arg = {0};
309 Client *c;
310 XButtonPressedEvent *ev = &e->xbutton;
311
312 click = ClkRootWin;
313 if(ev->window == barwin) {
314 i = x = 0;
315 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
316 if(i < LENGTH(tags)) {
317 click = ClkTagBar;
318 arg.ui = 1 << i;
319 }
320 else if(ev->x < x + blw)
321 click = ClkLtSymbol;
322 else if(ev->x > wx + ww - TEXTW(stext))
323 click = ClkStatusText;
324 else
325 click = ClkWinTitle;
326 }
327 else if((c = getclient(ev->window))) {
328 focus(c);
329 click = ClkClientWin;
330 }
331
332 for(i = 0; i < LENGTH(buttons); i++)
333 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
334 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
335 buttons[i].func(click == ClkTagBar ? &arg : &buttons[i].arg);
336 }
337
338 void
339 checkotherwm(void) {
340 otherwm = False;
341 XSetErrorHandler(xerrorstart);
342
343 /* this causes an error if some other window manager is running */
344 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
345 XSync(dpy, False);
346 if(otherwm)
347 die("dwm: another window manager is already running\n");
348 XSetErrorHandler(NULL);
349 xerrorxlib = XSetErrorHandler(xerror);
350 XSync(dpy, False);
351 }
352
353 void
354 cleanup(void) {
355 Arg a = {.i = ~0};
356 Layout foo = { "", NULL };
357
358 close(STDIN_FILENO);
359 view(&a);
360 lt[sellt] = &foo;
361 while(stack)
362 unmanage(stack);
363 if(dc.font.set)
364 XFreeFontSet(dpy, dc.font.set);
365 else
366 XFreeFont(dpy, dc.font.xfont);
367 XUngrabKey(dpy, AnyKey, AnyModifier, root);
368 XFreePixmap(dpy, dc.drawable);
369 XFreeGC(dpy, dc.gc);
370 XFreeCursor(dpy, cursor[CurNormal]);
371 XFreeCursor(dpy, cursor[CurResize]);
372 XFreeCursor(dpy, cursor[CurMove]);
373 XDestroyWindow(dpy, barwin);
374 XSync(dpy, False);
375 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
376 }
377
378 void
379 clearurgent(void) {
380 XWMHints *wmh;
381 Client *c;
382
383 for(c = clients; c; c = c->next)
384 if(ISVISIBLE(c) && c->isurgent) {
385 c->isurgent = False;
386 if (!(wmh = XGetWMHints(dpy, c->win)))
387 continue;
388
389 wmh->flags &= ~XUrgencyHint;
390 XSetWMHints(dpy, c->win, wmh);
391 XFree(wmh);
392 }
393 }
394
395 void
396 configure(Client *c) {
397 XConfigureEvent ce;
398
399 ce.type = ConfigureNotify;
400 ce.display = dpy;
401 ce.event = c->win;
402 ce.window = c->win;
403 ce.x = c->x;
404 ce.y = c->y;
405 ce.width = c->w;
406 ce.height = c->h;
407 ce.border_width = c->bw;
408 ce.above = None;
409 ce.override_redirect = False;
410 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
411 }
412
413 void
414 configurenotify(XEvent *e) {
415 XConfigureEvent *ev = &e->xconfigure;
416
417 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
418 sw = ev->width;
419 sh = ev->height;
420 updategeom();
421 updatebar();
422 arrange();
423 }
424 }
425
426 void
427 configurerequest(XEvent *e) {
428 Client *c;
429 XConfigureRequestEvent *ev = &e->xconfigurerequest;
430 XWindowChanges wc;
431
432 if((c = getclient(ev->window))) {
433 if(ev->value_mask & CWBorderWidth)
434 c->bw = ev->border_width;
435 else if(c->isfloating || !lt[sellt]->arrange) {
436 if(ev->value_mask & CWX)
437 c->x = sx + ev->x;
438 if(ev->value_mask & CWY)
439 c->y = sy + ev->y;
440 if(ev->value_mask & CWWidth)
441 c->w = ev->width;
442 if(ev->value_mask & CWHeight)
443 c->h = ev->height;
444 if((c->x - sx + c->w) > sw && c->isfloating)
445 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
446 if((c->y - sy + c->h) > sh && c->isfloating)
447 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
448 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
449 configure(c);
450 if(ISVISIBLE(c))
451 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
452 }
453 else
454 configure(c);
455 }
456 else {
457 wc.x = ev->x;
458 wc.y = ev->y;
459 wc.width = ev->width;
460 wc.height = ev->height;
461 wc.border_width = ev->border_width;
462 wc.sibling = ev->above;
463 wc.stack_mode = ev->detail;
464 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
465 }
466 XSync(dpy, False);
467 }
468
469 void
470 destroynotify(XEvent *e) {
471 Client *c;
472 XDestroyWindowEvent *ev = &e->xdestroywindow;
473
474 if((c = getclient(ev->window)))
475 unmanage(c);
476 }
477
478 void
479 detach(Client *c) {
480 Client **tc;
481
482 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
483 *tc = c->next;
484 }
485
486 void
487 detachstack(Client *c) {
488 Client **tc;
489
490 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
491 *tc = c->snext;
492 }
493
494 void
495 die(const char *errstr, ...) {
496 va_list ap;
497
498 va_start(ap, errstr);
499 vfprintf(stderr, errstr, ap);
500 va_end(ap);
501 exit(EXIT_FAILURE);
502 }
503
504 void
505 drawbar(void) {
506 int i, x;
507
508 dc.x = 0;
509 for(i = 0; i < LENGTH(tags); i++) {
510 dc.w = TEXTW(tags[i]);
511 if(tagset[seltags] & 1 << i) {
512 drawtext(tags[i], dc.sel, isurgent(i));
513 drawsquare(sel && sel->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
514 }
515 else {
516 drawtext(tags[i], dc.norm, isurgent(i));
517 drawsquare(sel && sel->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
518 }
519 dc.x += dc.w;
520 }
521 if(blw > 0) {
522 dc.w = blw;
523 drawtext(lt[sellt]->symbol, dc.norm, False);
524 x = dc.x + dc.w;
525 }
526 else
527 x = dc.x;
528 dc.w = TEXTW(stext);
529 dc.x = ww - dc.w;
530 if(dc.x < x) {
531 dc.x = x;
532 dc.w = ww - x;
533 }
534 drawtext(stext, dc.norm, False);
535 if((dc.w = dc.x - x) > bh) {
536 dc.x = x;
537 if(sel) {
538 drawtext(sel->name, dc.sel, False);
539 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
540 }
541 else
542 drawtext(NULL, dc.norm, False);
543 }
544 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
545 XSync(dpy, False);
546 }
547
548 void
549 drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
550 int x;
551 XGCValues gcv;
552 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
553
554 gcv.foreground = col[invert ? ColBG : ColFG];
555 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
556 x = (dc.font.ascent + dc.font.descent + 2) / 4;
557 r.x = dc.x + 1;
558 r.y = dc.y + 1;
559 if(filled) {
560 r.width = r.height = x + 1;
561 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
562 }
563 else if(empty) {
564 r.width = r.height = x;
565 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
566 }
567 }
568
569 void
570 drawtext(const char *text, ulong col[ColLast], Bool invert) {
571 int i, x, y, h, len, olen;
572 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
573 char buf[256];
574
575 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
576 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
577 if(!text)
578 return;
579 olen = strlen(text);
580 len = MIN(olen, sizeof buf);
581 memcpy(buf, text, len);
582 h = dc.font.ascent + dc.font.descent;
583 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
584 x = dc.x + (h / 2);
585 /* shorten text if necessary */
586 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
587 if(!len)
588 return;
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 detachstack(c);
629 attachstack(c);
630 grabbuttons(c, True);
631 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
632 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
633 }
634 else
635 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
636 sel = c;
637 drawbar();
638 }
639
640 void
641 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
642 XFocusChangeEvent *ev = &e->xfocus;
643
644 if(sel && ev->window != sel->win)
645 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
646 }
647
648 void
649 focusstack(const Arg *arg) {
650 Client *c = NULL, *i;
651
652 if(!sel)
653 return;
654 if (arg->i > 0) {
655 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
656 if(!c)
657 for(c = clients; c && !ISVISIBLE(c); c = c->next);
658 }
659 else {
660 for(i = clients; i != sel; i = i->next)
661 if(ISVISIBLE(i))
662 c = i;
663 if(!c)
664 for(; i; i = i->next)
665 if(ISVISIBLE(i))
666 c = i;
667 }
668 if(c) {
669 focus(c);
670 restack();
671 }
672 }
673
674 Client *
675 getclient(Window w) {
676 Client *c;
677
678 for(c = clients; c && c->win != w; c = c->next);
679 return c;
680 }
681
682 ulong
683 getcolor(const char *colstr) {
684 Colormap cmap = DefaultColormap(dpy, screen);
685 XColor color;
686
687 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
688 die("error, cannot allocate color '%s'\n", colstr);
689 return color.pixel;
690 }
691
692 long
693 getstate(Window w) {
694 int format, status;
695 long result = -1;
696 unsigned char *p = NULL;
697 ulong n, extra;
698 Atom real;
699
700 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
701 &real, &format, &n, &extra, (unsigned char **)&p);
702 if(status != Success)
703 return -1;
704 if(n != 0)
705 result = *p;
706 XFree(p);
707 return result;
708 }
709
710 Bool
711 gettextprop(Window w, Atom atom, char *text, uint size) {
712 char **list = NULL;
713 int n;
714 XTextProperty name;
715
716 if(!text || size == 0)
717 return False;
718 text[0] = '\0';
719 XGetTextProperty(dpy, w, &name, atom);
720 if(!name.nitems)
721 return False;
722 if(name.encoding == XA_STRING)
723 strncpy(text, (char *)name.value, size - 1);
724 else {
725 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
726 && n > 0 && *list) {
727 strncpy(text, *list, size - 1);
728 XFreeStringList(list);
729 }
730 }
731 text[size - 1] = '\0';
732 XFree(name.value);
733 return True;
734 }
735
736 void
737 grabbuttons(Client *c, Bool focused) {
738 uint i, j;
739 uint modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
740
741 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
742 if(focused) {
743 for(i = 0; i < LENGTH(buttons); i++)
744 if(buttons[i].click == ClkClientWin)
745 for(j = 0; j < LENGTH(modifiers); j++)
746 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
747 } else
748 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
749 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
750 }
751
752 void
753 grabkeys(void) {
754 uint i, j;
755 KeyCode code;
756 XModifierKeymap *modmap;
757
758 /* init modifier map */
759 modmap = XGetModifierMapping(dpy);
760 for(i = 0; i < 8; i++)
761 for(j = 0; j < modmap->max_keypermod; j++) {
762 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
763 numlockmask = (1 << i);
764 }
765 XFreeModifiermap(modmap);
766
767 XUngrabKey(dpy, AnyKey, AnyModifier, root);
768 for(i = 0; i < LENGTH(keys); i++) {
769 code = XKeysymToKeycode(dpy, keys[i].keysym);
770 XGrabKey(dpy, code, keys[i].mod, root, True,
771 GrabModeAsync, GrabModeAsync);
772 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
773 GrabModeAsync, GrabModeAsync);
774 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
775 GrabModeAsync, GrabModeAsync);
776 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
777 GrabModeAsync, GrabModeAsync);
778 }
779 }
780
781 void
782 initfont(const char *fontstr) {
783 char *def, **missing;
784 int i, n;
785
786 missing = NULL;
787 if(dc.font.set)
788 XFreeFontSet(dpy, dc.font.set);
789 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
790 if(missing) {
791 while(n--)
792 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
793 XFreeStringList(missing);
794 }
795 if(dc.font.set) {
796 XFontSetExtents *font_extents;
797 XFontStruct **xfonts;
798 char **font_names;
799 dc.font.ascent = dc.font.descent = 0;
800 font_extents = XExtentsOfFontSet(dc.font.set);
801 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
802 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
803 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
804 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
805 xfonts++;
806 }
807 }
808 else {
809 if(dc.font.xfont)
810 XFreeFont(dpy, dc.font.xfont);
811 dc.font.xfont = NULL;
812 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
813 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
814 die("error, cannot load font: '%s'\n", fontstr);
815 dc.font.ascent = dc.font.xfont->ascent;
816 dc.font.descent = dc.font.xfont->descent;
817 }
818 dc.font.height = dc.font.ascent + dc.font.descent;
819 }
820
821 Bool
822 isoccupied(uint t) {
823 Client *c;
824
825 for(c = clients; c; c = c->next)
826 if(c->tags & 1 << t)
827 return True;
828 return False;
829 }
830
831 Bool
832 isprotodel(Client *c) {
833 int i, n;
834 Atom *protocols;
835 Bool ret = False;
836
837 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
838 for(i = 0; !ret && i < n; i++)
839 if(protocols[i] == wmatom[WMDelete])
840 ret = True;
841 XFree(protocols);
842 }
843 return ret;
844 }
845
846 Bool
847 isurgent(uint t) {
848 Client *c;
849
850 for(c = clients; c; c = c->next)
851 if(c->isurgent && c->tags & 1 << t)
852 return True;
853 return False;
854 }
855
856 void
857 keypress(XEvent *e) {
858 uint i;
859 KeySym keysym;
860 XKeyEvent *ev;
861
862 ev = &e->xkey;
863 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
864 for(i = 0; i < LENGTH(keys); i++)
865 if(keysym == keys[i].keysym
866 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
867 && keys[i].func)
868 keys[i].func(&(keys[i].arg));
869 }
870
871 void
872 killclient(const Arg *arg) {
873 XEvent ev;
874
875 if(!sel)
876 return;
877 if(isprotodel(sel)) {
878 ev.type = ClientMessage;
879 ev.xclient.window = sel->win;
880 ev.xclient.message_type = wmatom[WMProtocols];
881 ev.xclient.format = 32;
882 ev.xclient.data.l[0] = wmatom[WMDelete];
883 ev.xclient.data.l[1] = CurrentTime;
884 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
885 }
886 else
887 XKillClient(dpy, sel->win);
888 }
889
890 void
891 manage(Window w, XWindowAttributes *wa) {
892 Client *c, *t = NULL;
893 Status rettrans;
894 Window trans;
895 XWindowChanges wc;
896
897 if(!(c = calloc(1, sizeof(Client))))
898 die("fatal: could not calloc() %u bytes\n", sizeof(Client));
899 c->win = w;
900
901 /* geometry */
902 c->x = wa->x;
903 c->y = wa->y;
904 c->w = wa->width;
905 c->h = wa->height;
906 c->oldbw = wa->border_width;
907 if(c->w == sw && c->h == sh) {
908 c->x = sx;
909 c->y = sy;
910 c->bw = wa->border_width;
911 }
912 else {
913 if(c->x + c->w + 2 * c->bw > sx + sw)
914 c->x = sx + sw - c->w - 2 * c->bw;
915 if(c->y + c->h + 2 * c->bw > sy + sh)
916 c->y = sy + sh - c->h - 2 * c->bw;
917 c->x = MAX(c->x, sx);
918 /* only fix client y-offset, if the client center might cover the bar */
919 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
920 c->bw = borderpx;
921 }
922
923 wc.border_width = c->bw;
924 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
925 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
926 configure(c); /* propagates border_width, if size doesn't change */
927 updatesizehints(c);
928 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
929 grabbuttons(c, False);
930 updatetitle(c);
931 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
932 for(t = clients; t && t->win != trans; t = t->next);
933 if(t)
934 c->tags = t->tags;
935 else
936 applyrules(c);
937 if(!c->isfloating)
938 c->isfloating = (rettrans == Success) || c->isfixed;
939 if(c->isfloating)
940 XRaiseWindow(dpy, c->win);
941 attach(c);
942 attachstack(c);
943 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
944 XMapWindow(dpy, c->win);
945 setclientstate(c, NormalState);
946 arrange();
947 }
948
949 void
950 mappingnotify(XEvent *e) {
951 XMappingEvent *ev = &e->xmapping;
952
953 XRefreshKeyboardMapping(ev);
954 if(ev->request == MappingKeyboard)
955 grabkeys();
956 }
957
958 void
959 maprequest(XEvent *e) {
960 static XWindowAttributes wa;
961 XMapRequestEvent *ev = &e->xmaprequest;
962
963 if(!XGetWindowAttributes(dpy, ev->window, &wa))
964 return;
965 if(wa.override_redirect)
966 return;
967 if(!getclient(ev->window))
968 manage(ev->window, &wa);
969 }
970
971 void
972 monocle(void) {
973 Client *c;
974
975 for(c = nexttiled(clients); c; c = nexttiled(c->next))
976 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
977 }
978
979 void
980 movemouse(const Arg *arg) {
981 int x1, y1, ocx, ocy, di, nx, ny;
982 uint dui;
983 Client *c;
984 Window dummy;
985 XEvent ev;
986
987 if(!(c = sel))
988 return;
989 restack();
990 ocx = nx = c->x;
991 ocy = ny = c->y;
992 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
993 None, cursor[CurMove], CurrentTime) != GrabSuccess)
994 return;
995 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
996 for(;;) {
997 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
998 switch (ev.type) {
999 case ButtonRelease:
1000 XUngrabPointer(dpy, CurrentTime);
1001 return;
1002 case ConfigureRequest:
1003 case Expose:
1004 case MapRequest:
1005 handler[ev.type](&ev);
1006 break;
1007 case MotionNotify:
1008 XSync(dpy, False);
1009 nx = ocx + (ev.xmotion.x - x1);
1010 ny = ocy + (ev.xmotion.y - y1);
1011 if(snap && nx >= wx && nx <= wx + ww
1012 && ny >= wy && ny <= wy + wh) {
1013 if(abs(wx - nx) < snap)
1014 nx = wx;
1015 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1016 nx = wx + ww - c->w - 2 * c->bw;
1017 if(abs(wy - ny) < snap)
1018 ny = wy;
1019 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1020 ny = wy + wh - c->h - 2 * c->bw;
1021 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1022 togglefloating(NULL);
1023 }
1024 if(!lt[sellt]->arrange || c->isfloating)
1025 resize(c, nx, ny, c->w, c->h, False);
1026 break;
1027 }
1028 }
1029 }
1030
1031 Client *
1032 nexttiled(Client *c) {
1033 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1034 return c;
1035 }
1036
1037 void
1038 propertynotify(XEvent *e) {
1039 Client *c;
1040 Window trans;
1041 XPropertyEvent *ev = &e->xproperty;
1042
1043 if(ev->state == PropertyDelete)
1044 return; /* ignore */
1045 if((c = getclient(ev->window))) {
1046 switch (ev->atom) {
1047 default: break;
1048 case XA_WM_TRANSIENT_FOR:
1049 XGetTransientForHint(dpy, c->win, &trans);
1050 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1051 arrange();
1052 break;
1053 case XA_WM_NORMAL_HINTS:
1054 updatesizehints(c);
1055 break;
1056 case XA_WM_HINTS:
1057 updatewmhints(c);
1058 drawbar();
1059 break;
1060 }
1061 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1062 updatetitle(c);
1063 if(c == sel)
1064 drawbar();
1065 }
1066 }
1067 }
1068
1069 void
1070 quit(const Arg *arg) {
1071 readin = running = False;
1072 }
1073
1074 void
1075 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1076 XWindowChanges wc;
1077
1078 if(sizehints) {
1079 /* set minimum possible */
1080 w = MAX(1, w);
1081 h = MAX(1, h);
1082
1083 /* temporarily remove base dimensions */
1084 w -= c->basew;
1085 h -= c->baseh;
1086
1087 /* adjust for aspect limits */
1088 if(c->mina > 0 && c->maxa > 0) {
1089 if(c->maxa < (float) w/h)
1090 w = h * c->maxa;
1091 else if(c->mina > (float) h/w)
1092 h = w * c->mina;
1093 }
1094
1095 /* adjust for increment value */
1096 if(c->incw)
1097 w -= w % c->incw;
1098 if(c->inch)
1099 h -= h % c->inch;
1100
1101 /* restore base dimensions */
1102 w += c->basew;
1103 h += c->baseh;
1104
1105 w = MAX(w, c->minw);
1106 h = MAX(h, c->minh);
1107
1108 if(c->maxw)
1109 w = MIN(w, c->maxw);
1110
1111 if(c->maxh)
1112 h = MIN(h, c->maxh);
1113 }
1114 if(w <= 0 || h <= 0)
1115 return;
1116 if(x > sx + sw)
1117 x = sw - w - 2 * c->bw;
1118 if(y > sy + sh)
1119 y = sh - h - 2 * c->bw;
1120 if(x + w + 2 * c->bw < sx)
1121 x = sx;
1122 if(y + h + 2 * c->bw < sy)
1123 y = sy;
1124 if(h < bh)
1125 h = bh;
1126 if(w < bh)
1127 w = bh;
1128 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1129 c->x = wc.x = x;
1130 c->y = wc.y = y;
1131 c->w = wc.width = w;
1132 c->h = wc.height = h;
1133 wc.border_width = c->bw;
1134 XConfigureWindow(dpy, c->win,
1135 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1136 configure(c);
1137 XSync(dpy, False);
1138 }
1139 }
1140
1141 void
1142 resizemouse(const Arg *arg) {
1143 int ocx, ocy;
1144 int nw, nh;
1145 Client *c;
1146 XEvent ev;
1147
1148 if(!(c = sel))
1149 return;
1150 restack();
1151 ocx = c->x;
1152 ocy = c->y;
1153 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1154 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1155 return;
1156 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1157 for(;;) {
1158 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1159 switch(ev.type) {
1160 case ButtonRelease:
1161 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1162 c->w + c->bw - 1, c->h + c->bw - 1);
1163 XUngrabPointer(dpy, CurrentTime);
1164 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1165 return;
1166 case ConfigureRequest:
1167 case Expose:
1168 case MapRequest:
1169 handler[ev.type](&ev);
1170 break;
1171 case MotionNotify:
1172 XSync(dpy, False);
1173 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1174 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1175
1176 if(snap && nw >= wx && nw <= wx + ww
1177 && nh >= wy && nh <= wy + wh) {
1178 if(!c->isfloating && lt[sellt]->arrange
1179 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1180 togglefloating(NULL);
1181 }
1182 if(!lt[sellt]->arrange || c->isfloating)
1183 resize(c, c->x, c->y, nw, nh, True);
1184 break;
1185 }
1186 }
1187 }
1188
1189 void
1190 restack(void) {
1191 Client *c;
1192 XEvent ev;
1193 XWindowChanges wc;
1194
1195 drawbar();
1196 if(!sel)
1197 return;
1198 if(sel->isfloating || !lt[sellt]->arrange)
1199 XRaiseWindow(dpy, sel->win);
1200 if(lt[sellt]->arrange) {
1201 wc.stack_mode = Below;
1202 wc.sibling = barwin;
1203 for(c = stack; c; c = c->snext)
1204 if(!c->isfloating && ISVISIBLE(c)) {
1205 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1206 wc.sibling = c->win;
1207 }
1208 }
1209 XSync(dpy, False);
1210 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1211 }
1212
1213 void
1214 run(void) {
1215 char *p;
1216 char sbuf[sizeof stext];
1217 fd_set rd;
1218 int r, xfd;
1219 uint len, offset;
1220 XEvent ev;
1221
1222 /* main event loop, also reads status text from stdin */
1223 XSync(dpy, False);
1224 xfd = ConnectionNumber(dpy);
1225 readin = True;
1226 offset = 0;
1227 len = sizeof stext - 1;
1228 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1229 while(running) {
1230 FD_ZERO(&rd);
1231 if(readin)
1232 FD_SET(STDIN_FILENO, &rd);
1233 FD_SET(xfd, &rd);
1234 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1235 if(errno == EINTR)
1236 continue;
1237 die("select failed\n");
1238 }
1239 if(FD_ISSET(STDIN_FILENO, &rd)) {
1240 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1241 case -1:
1242 strncpy(stext, strerror(errno), len);
1243 readin = False;
1244 break;
1245 case 0:
1246 strncpy(stext, "EOF", 4);
1247 readin = False;
1248 break;
1249 default:
1250 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1251 if(*p == '\n' || *p == '\0') {
1252 *p = '\0';
1253 strncpy(stext, sbuf, len);
1254 p += r - 1; /* p is sbuf + offset + r - 1 */
1255 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1256 offset = r;
1257 if(r)
1258 memmove(sbuf, p - r + 1, r);
1259 break;
1260 }
1261 break;
1262 }
1263 drawbar();
1264 }
1265 while(XPending(dpy)) {
1266 XNextEvent(dpy, &ev);
1267 if(handler[ev.type])
1268 (handler[ev.type])(&ev); /* call handler */
1269 }
1270 }
1271 }
1272
1273 void
1274 scan(void) {
1275 uint i, num;
1276 Window *wins, d1, d2;
1277 XWindowAttributes wa;
1278
1279 wins = NULL;
1280 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1281 for(i = 0; i < num; i++) {
1282 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1283 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1284 continue;
1285 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1286 manage(wins[i], &wa);
1287 }
1288 for(i = 0; i < num; i++) { /* now the transients */
1289 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1290 continue;
1291 if(XGetTransientForHint(dpy, wins[i], &d1)
1292 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1293 manage(wins[i], &wa);
1294 }
1295 }
1296 if(wins)
1297 XFree(wins);
1298 }
1299
1300 void
1301 setclientstate(Client *c, long state) {
1302 long data[] = {state, None};
1303
1304 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1305 PropModeReplace, (unsigned char *)data, 2);
1306 }
1307
1308 void
1309 setlayout(const Arg *arg) {
1310 if(!arg || !arg->v || arg->v != lt[sellt])
1311 sellt ^= 1;
1312 if(arg && arg->v)
1313 lt[sellt] = (Layout *)arg->v;
1314 if(sel)
1315 arrange();
1316 else
1317 drawbar();
1318 }
1319
1320 /* arg > 1.0 will set mfact absolutly */
1321 void
1322 setmfact(const Arg *arg) {
1323 float f;
1324
1325 if(!arg || !lt[sellt]->arrange)
1326 return;
1327 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1328 if(f < 0.1 || f > 0.9)
1329 return;
1330 mfact = f;
1331 arrange();
1332 }
1333
1334 void
1335 setup(void) {
1336 uint i;
1337 int w;
1338 XSetWindowAttributes wa;
1339
1340 /* init screen */
1341 screen = DefaultScreen(dpy);
1342 root = RootWindow(dpy, screen);
1343 initfont(font);
1344 sx = 0;
1345 sy = 0;
1346 sw = DisplayWidth(dpy, screen);
1347 sh = DisplayHeight(dpy, screen);
1348 bh = dc.h = dc.font.height + 2;
1349 lt[0] = &layouts[0];
1350 lt[1] = &layouts[1 % LENGTH(layouts)];
1351 updategeom();
1352
1353 /* init atoms */
1354 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1355 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1356 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1357 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1358 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1359 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1360
1361 /* init cursors */
1362 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1363 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1364 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1365
1366 /* init appearance */
1367 dc.norm[ColBorder] = getcolor(normbordercolor);
1368 dc.norm[ColBG] = getcolor(normbgcolor);
1369 dc.norm[ColFG] = getcolor(normfgcolor);
1370 dc.sel[ColBorder] = getcolor(selbordercolor);
1371 dc.sel[ColBG] = getcolor(selbgcolor);
1372 dc.sel[ColFG] = getcolor(selfgcolor);
1373 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1374 dc.gc = XCreateGC(dpy, root, 0, 0);
1375 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1376 if(!dc.font.set)
1377 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1378
1379 /* init bar */
1380 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1381 w = TEXTW(layouts[i].symbol);
1382 blw = MAX(blw, w);
1383 }
1384
1385 wa.override_redirect = 1;
1386 wa.background_pixmap = ParentRelative;
1387 wa.event_mask = ButtonPressMask|ExposureMask;
1388
1389 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1390 CopyFromParent, DefaultVisual(dpy, screen),
1391 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1392 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1393 XMapRaised(dpy, barwin);
1394 strcpy(stext, "dwm-"VERSION);
1395 drawbar();
1396
1397 /* EWMH support per view */
1398 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1399 PropModeReplace, (unsigned char *) netatom, NetLast);
1400
1401 /* select for events */
1402 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1403 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1404 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1405 XSelectInput(dpy, root, wa.event_mask);
1406
1407
1408 /* grab keys */
1409 grabkeys();
1410 }
1411
1412 void
1413 spawn(const Arg *arg) {
1414 /* The double-fork construct avoids zombie processes and keeps the code
1415 * clean from stupid signal handlers. */
1416 if(fork() == 0) {
1417 if(fork() == 0) {
1418 if(dpy)
1419 close(ConnectionNumber(dpy));
1420 setsid();
1421 execvp(((char **)arg->v)[0], (char **)arg->v);
1422 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1423 perror(" failed");
1424 }
1425 exit(0);
1426 }
1427 wait(0);
1428 }
1429
1430 void
1431 tag(const Arg *arg) {
1432 if(sel && arg->ui & TAGMASK) {
1433 sel->tags = arg->ui & TAGMASK;
1434 arrange();
1435 }
1436 }
1437
1438 int
1439 textnw(const char *text, uint len) {
1440 XRectangle r;
1441
1442 if(dc.font.set) {
1443 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1444 return r.width;
1445 }
1446 return XTextWidth(dc.font.xfont, text, len);
1447 }
1448
1449 void
1450 tile(void) {
1451 int x, y, h, w, mw;
1452 uint i, n;
1453 Client *c;
1454
1455 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1456 if(n == 0)
1457 return;
1458
1459 /* master */
1460 c = nexttiled(clients);
1461 mw = mfact * ww;
1462 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1463
1464 if(--n == 0)
1465 return;
1466
1467 /* tile stack */
1468 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1469 y = wy;
1470 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1471 h = wh / n;
1472 if(h < bh)
1473 h = wh;
1474
1475 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1476 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1477 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1478 if(h != wh)
1479 y = c->y + c->h + 2 * c->bw;
1480 }
1481 }
1482
1483 void
1484 togglebar(const Arg *arg) {
1485 showbar = !showbar;
1486 updategeom();
1487 updatebar();
1488 arrange();
1489 }
1490
1491 void
1492 togglefloating(const Arg *arg) {
1493 if(!sel)
1494 return;
1495 sel->isfloating = !sel->isfloating || sel->isfixed;
1496 if(sel->isfloating)
1497 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1498 arrange();
1499 }
1500
1501 void
1502 toggletag(const Arg *arg) {
1503 uint mask = sel->tags ^ (arg->ui & TAGMASK);
1504
1505 if(sel && mask) {
1506 sel->tags = mask;
1507 arrange();
1508 }
1509 }
1510
1511 void
1512 toggleview(const Arg *arg) {
1513 uint mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1514
1515 if(mask) {
1516 tagset[seltags] = mask;
1517 clearurgent();
1518 arrange();
1519 }
1520 }
1521
1522 void
1523 unmanage(Client *c) {
1524 XWindowChanges wc;
1525
1526 wc.border_width = c->oldbw;
1527 /* The server grab construct avoids race conditions. */
1528 XGrabServer(dpy);
1529 XSetErrorHandler(xerrordummy);
1530 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1531 detach(c);
1532 detachstack(c);
1533 if(sel == c)
1534 focus(NULL);
1535 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1536 setclientstate(c, WithdrawnState);
1537 free(c);
1538 XSync(dpy, False);
1539 XSetErrorHandler(xerror);
1540 XUngrabServer(dpy);
1541 arrange();
1542 }
1543
1544 void
1545 unmapnotify(XEvent *e) {
1546 Client *c;
1547 XUnmapEvent *ev = &e->xunmap;
1548
1549 if((c = getclient(ev->window)))
1550 unmanage(c);
1551 }
1552
1553 void
1554 updatebar(void) {
1555 if(dc.drawable != 0)
1556 XFreePixmap(dpy, dc.drawable);
1557 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1558 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1559 }
1560
1561 void
1562 updategeom(void) {
1563 #ifdef XINERAMA
1564 int i;
1565 XineramaScreenInfo *info = NULL;
1566
1567 /* window area geometry */
1568 if(XineramaIsActive(dpy)) {
1569 info = XineramaQueryScreens(dpy, &i);
1570 wx = info[xidx].x_org;
1571 wy = showbar && topbar ? info[xidx].y_org + bh : info[xidx].y_org;
1572 ww = info[xidx].width;
1573 wh = showbar ? info[xidx].height - bh : info[xidx].height;
1574 XFree(info);
1575 }
1576 else
1577 #endif
1578 {
1579 wx = sx;
1580 wy = showbar && topbar ? sy + bh : sy;
1581 ww = sw;
1582 wh = showbar ? sh - bh : sh;
1583 }
1584
1585 /* bar position */
1586 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1587 }
1588
1589 void
1590 updatesizehints(Client *c) {
1591 long msize;
1592 XSizeHints size;
1593
1594 XGetWMNormalHints(dpy, c->win, &size, &msize);
1595 if(size.flags & PBaseSize) {
1596 c->basew = size.base_width;
1597 c->baseh = size.base_height;
1598 }
1599 else if(size.flags & PMinSize) {
1600 c->basew = size.min_width;
1601 c->baseh = size.min_height;
1602 }
1603 else
1604 c->basew = c->baseh = 0;
1605 if(size.flags & PResizeInc) {
1606 c->incw = size.width_inc;
1607 c->inch = size.height_inc;
1608 }
1609 else
1610 c->incw = c->inch = 0;
1611 if(size.flags & PMaxSize) {
1612 c->maxw = size.max_width;
1613 c->maxh = size.max_height;
1614 }
1615 else
1616 c->maxw = c->maxh = 0;
1617 if(size.flags & PMinSize) {
1618 c->minw = size.min_width;
1619 c->minh = size.min_height;
1620 }
1621 else if(size.flags & PBaseSize) {
1622 c->minw = size.base_width;
1623 c->minh = size.base_height;
1624 }
1625 else
1626 c->minw = c->minh = 0;
1627 if(size.flags & PAspect) {
1628 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1629 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1630 }
1631 else
1632 c->maxa = c->mina = 0.0;
1633 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1634 && c->maxw == c->minw && c->maxh == c->minh);
1635 }
1636
1637 void
1638 updatetitle(Client *c) {
1639 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1640 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1641 }
1642
1643 void
1644 updatewmhints(Client *c) {
1645 XWMHints *wmh;
1646
1647 if((wmh = XGetWMHints(dpy, c->win))) {
1648 if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
1649 wmh->flags &= ~XUrgencyHint;
1650 XSetWMHints(dpy, c->win, wmh);
1651 }
1652 else
1653 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1654
1655 XFree(wmh);
1656 }
1657 }
1658
1659 void
1660 view(const Arg *arg) {
1661 if(arg && (arg->i & TAGMASK) == tagset[seltags])
1662 return;
1663 seltags ^= 1; /* toggle sel tagset */
1664 if(arg && (arg->ui & TAGMASK))
1665 tagset[seltags] = arg->i & TAGMASK;
1666 clearurgent();
1667 arrange();
1668 }
1669
1670 /* There's no way to check accesses to destroyed windows, thus those cases are
1671 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1672 * default error handler, which may call exit. */
1673 int
1674 xerror(Display *dpy, XErrorEvent *ee) {
1675 if(ee->error_code == BadWindow
1676 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1677 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1678 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1679 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1680 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1681 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1682 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1683 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1684 return 0;
1685 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1686 ee->request_code, ee->error_code);
1687 return xerrorxlib(dpy, ee); /* may call exit */
1688 }
1689
1690 int
1691 xerrordummy(Display *dpy, XErrorEvent *ee) {
1692 return 0;
1693 }
1694
1695 /* Startup Error handler to check if another window manager
1696 * is already running. */
1697 int
1698 xerrorstart(Display *dpy, XErrorEvent *ee) {
1699 otherwm = True;
1700 return -1;
1701 }
1702
1703 void
1704 zoom(const Arg *arg) {
1705 Client *c = sel;
1706
1707 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1708 return;
1709 if(c == nexttiled(clients))
1710 if(!c || !(c = nexttiled(c->next)))
1711 return;
1712 detach(c);
1713 attach(c);
1714 focus(c);
1715 arrange();
1716 }
1717
1718 int
1719 main(int argc, char *argv[]) {
1720 if(argc == 2 && !strcmp("-v", argv[1]))
1721 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1722 else if(argc != 1)
1723 die("usage: dwm [-v]\n");
1724
1725 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1726 fprintf(stderr, "warning: no locale support\n");
1727
1728 if(!(dpy = XOpenDisplay(0)))
1729 die("dwm: cannot open display\n");
1730
1731 checkotherwm();
1732 setup();
1733 scan();
1734 run();
1735 cleanup();
1736
1737 XCloseDisplay(dpy);
1738 return 0;
1739 }