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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
57 /* enums */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
62 enum { ClkLtSymbol = 64, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkLast }; /* clicks */
64
65 /* typedefs */
66 typedef unsigned int uint;
67 typedef unsigned long ulong;
68
69 typedef union {
70 int i;
71 uint ui;
72 float f;
73 void *v;
74 } Arg;
75
76 typedef struct {
77 uint click;
78 uint mask;
79 uint button;
80 void (*func)(const Arg *arg);
81 const Arg arg;
82 } Button;
83
84 typedef struct Client Client;
85 struct Client {
86 char name[256];
87 int x, y, w, h;
88 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
89 float mina, maxa;
90 int bw, oldbw;
91 Bool isbanned, isfixed, isfloating, ismoved, isurgent;
92 uint tags;
93 Client *next;
94 Client *snext;
95 Window win;
96 };
97
98 typedef struct {
99 int x, y, w, h;
100 ulong norm[ColLast];
101 ulong sel[ColLast];
102 Drawable drawable;
103 GC gc;
104 struct {
105 int ascent;
106 int descent;
107 int height;
108 XFontSet set;
109 XFontStruct *xfont;
110 } font;
111 } DC; /* draw context */
112
113 typedef struct {
114 uint mod;
115 KeySym keysym;
116 void (*func)(const Arg *);
117 const Arg arg;
118 } Key;
119
120 typedef struct {
121 const char *symbol;
122 void (*arrange)(void);
123 } Layout;
124
125 typedef struct {
126 const char *class;
127 const char *instance;
128 const char *title;
129 uint tags;
130 Bool isfloating;
131 } Rule;
132
133 /* function declarations */
134 static void applyrules(Client *c);
135 static void arrange(void);
136 static void attach(Client *c);
137 static void attachstack(Client *c);
138 static void buttonpress(XEvent *e);
139 static void checkotherwm(void);
140 static void cleanup(void);
141 static void configure(Client *c);
142 static void configurenotify(XEvent *e);
143 static void configurerequest(XEvent *e);
144 static void destroynotify(XEvent *e);
145 static void detach(Client *c);
146 static void detachstack(Client *c);
147 static void drawbar(void);
148 static void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]);
149 static void drawtext(const char *text, ulong col[ColLast], Bool invert);
150 static void enternotify(XEvent *e);
151 static void eprint(const char *errstr, ...);
152 static void expose(XEvent *e);
153 static void focus(Client *c);
154 static void focusin(XEvent *e);
155 static void focusstack(const Arg *arg);
156 static Client *getclient(Window w);
157 static ulong getcolor(const char *colstr);
158 static long getstate(Window w);
159 static Bool gettextprop(Window w, Atom atom, char *text, uint size);
160 static void grabbuttons(Client *c, Bool focused);
161 static void grabkeys(void);
162 static void initfont(const char *fontstr);
163 static Bool isoccupied(uint t);
164 static Bool isprotodel(Client *c);
165 static Bool isurgent(uint t);
166 static void keypress(XEvent *e);
167 static void killclient(const Arg *arg);
168 static void manage(Window w, XWindowAttributes *wa);
169 static void mappingnotify(XEvent *e);
170 static void maprequest(XEvent *e);
171 static void movemouse(const Arg *arg);
172 static Client *nexttiled(Client *c);
173 static void propertynotify(XEvent *e);
174 static void quit(const Arg *arg);
175 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
176 static void resizemouse(const Arg *arg);
177 static void restack(void);
178 static void run(void);
179 static void scan(void);
180 static void setclientstate(Client *c, long state);
181 static void setmfact(const Arg *arg);
182 static void setup(void);
183 static void spawn(const Arg *arg);
184 static void tag(const Arg *arg);
185 static int textnw(const char *text, uint len);
186 static void tile(void);
187 static void togglebar(const Arg *arg);
188 static void togglefloating(const Arg *arg);
189 static void togglelayout(const Arg *arg);
190 static void togglemax(const Arg *arg);
191 static void toggletag(const Arg *arg);
192 static void toggleview(const Arg *arg);
193 static void unmanage(Client *c);
194 static void unmapnotify(XEvent *e);
195 static void updatebar(void);
196 static void updategeom(void);
197 static void updatesizehints(Client *c);
198 static void updatetitle(Client *c);
199 static void updatewmhints(Client *c);
200 static void view(const Arg *arg);
201 static int xerror(Display *dpy, XErrorEvent *ee);
202 static int xerrordummy(Display *dpy, XErrorEvent *ee);
203 static int xerrorstart(Display *dpy, XErrorEvent *ee);
204 static void zoom(const Arg *arg);
205
206 /* variables */
207 static char stext[256];
208 static int screen, sx, sy, sw, sh;
209 static int by, bh, blw, wx, wy, ww, wh;
210 static uint seltags = 0;
211 static int (*xerrorxlib)(Display *, XErrorEvent *);
212 static uint numlockmask = 0;
213 static void (*handler[LASTEvent]) (XEvent *) = {
214 [ButtonPress] = buttonpress,
215 [ConfigureRequest] = configurerequest,
216 [ConfigureNotify] = configurenotify,
217 [DestroyNotify] = destroynotify,
218 [EnterNotify] = enternotify,
219 [Expose] = expose,
220 [FocusIn] = focusin,
221 [KeyPress] = keypress,
222 [MappingNotify] = mappingnotify,
223 [MapRequest] = maprequest,
224 [PropertyNotify] = propertynotify,
225 [UnmapNotify] = unmapnotify
226 };
227 static Atom wmatom[WMLast], netatom[NetLast];
228 static Bool ismax = False;
229 static Bool otherwm, readin;
230 static Bool running = True;
231 static uint tagset[] = {1, 1}; /* after start, first tag is selected */
232 static Client *clients = NULL;
233 static Client *sel = NULL;
234 static Client *stack = NULL;
235 static Cursor cursor[CurLast];
236 static Display *dpy;
237 static DC dc = {0};
238 static Layout *lt = NULL;
239 static Window root, barwin;
240 /* configuration, allows nested code to access above variables */
241 #include "config.h"
242
243 /* compile-time check if all tags fit into an uint bit array. */
244 struct NumTags { char limitexceeded[sizeof(uint) * 8 < LENGTH(tags) ? -1 : 1]; };
245
246 /* function implementations */
247 void
248 applyrules(Client *c) {
249 uint i;
250 Rule *r;
251 XClassHint ch = { 0 };
252
253 /* rule matching */
254 XGetClassHint(dpy, c->win, &ch);
255 for(i = 0; i < LENGTH(rules); i++) {
256 r = &rules[i];
257 if((!r->title || strstr(c->name, r->title))
258 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
259 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
260 c->isfloating = r->isfloating;
261 c->tags |= r->tags & TAGMASK;
262 }
263 }
264 if(ch.res_class)
265 XFree(ch.res_class);
266 if(ch.res_name)
267 XFree(ch.res_name);
268 if(!c->tags)
269 c->tags = tagset[seltags];
270 }
271
272 void
273 arrange(void) {
274 Client *c;
275
276 for(c = clients; c; c = c->next)
277 if(c->tags & tagset[seltags]) { /* is visible */
278 if(ismax && !c->isfixed) {
279 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
280 c->ismoved = True;
281 }
282 else if(!lt->arrange || c->isfloating)
283 resize(c, c->x, c->y, c->w, c->h, True);
284 c->isbanned = False;
285 }
286 else if(!c->isbanned) {
287 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
288 c->isbanned = c->ismoved = True;
289 }
290
291 focus(NULL);
292 if(lt->arrange && !ismax)
293 lt->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 uint i, x, click;
312 Client *c;
313 XButtonPressedEvent *ev = &e->xbutton;
314
315 click = ClkLast;
316 if(ev->window == barwin) {
317 i = x = 0;
318 do
319 x += TEXTW(tags[i]);
320 while(ev->x >= x && ++i < LENGTH(tags));
321 if(i < LENGTH(tags))
322 click = i;
323 else if(ev->x < x + blw)
324 click = ClkLtSymbol;
325 else if(ev->x > wx + ww - TEXTW(stext))
326 click = ClkStatusText;
327 else
328 click = ClkWinTitle;
329 }
330 else if((c = getclient(ev->window)))
331 click = ClkClientWin;
332
333 for(i = 0; i < LENGTH(buttons); i++)
334 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
335 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
336 buttons[i].func(&buttons[i].arg);
337 }
338
339 void
340 checkotherwm(void) {
341 otherwm = False;
342 XSetErrorHandler(xerrorstart);
343
344 /* this causes an error if some other window manager is running */
345 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
346 XSync(dpy, False);
347 if(otherwm)
348 eprint("dwm: another window manager is already running\n");
349 XSetErrorHandler(NULL);
350 xerrorxlib = XSetErrorHandler(xerror);
351 XSync(dpy, False);
352 }
353
354 void
355 cleanup(void) {
356 Arg a = {.i = ~0};
357 Layout foo = { "", NULL };
358
359 close(STDIN_FILENO);
360 view(&a);
361 lt = &foo;
362 while(stack)
363 unmanage(stack);
364 if(dc.font.set)
365 XFreeFontSet(dpy, dc.font.set);
366 else
367 XFreeFont(dpy, dc.font.xfont);
368 XUngrabKey(dpy, AnyKey, AnyModifier, root);
369 XFreePixmap(dpy, dc.drawable);
370 XFreeGC(dpy, dc.gc);
371 XFreeCursor(dpy, cursor[CurNormal]);
372 XFreeCursor(dpy, cursor[CurResize]);
373 XFreeCursor(dpy, cursor[CurMove]);
374 XDestroyWindow(dpy, barwin);
375 XSync(dpy, False);
376 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
377 }
378
379 void
380 configure(Client *c) {
381 XConfigureEvent ce;
382
383 ce.type = ConfigureNotify;
384 ce.display = dpy;
385 ce.event = c->win;
386 ce.window = c->win;
387 ce.x = c->x;
388 ce.y = c->y;
389 ce.width = c->w;
390 ce.height = c->h;
391 ce.border_width = c->bw;
392 ce.above = None;
393 ce.override_redirect = False;
394 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
395 }
396
397 void
398 configurenotify(XEvent *e) {
399 XConfigureEvent *ev = &e->xconfigure;
400
401 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
402 sw = ev->width;
403 sh = ev->height;
404 updategeom();
405 updatebar();
406 arrange();
407 }
408 }
409
410 void
411 configurerequest(XEvent *e) {
412 Client *c;
413 XConfigureRequestEvent *ev = &e->xconfigurerequest;
414 XWindowChanges wc;
415
416 if((c = getclient(ev->window))) {
417 if(ev->value_mask & CWBorderWidth)
418 c->bw = ev->border_width;
419 if(ismax && !c->isbanned && !c->isfixed)
420 XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh + 2 * c->bw);
421 else if(c->isfloating || !lt->arrange) {
422 if(ev->value_mask & CWX)
423 c->x = sx + ev->x;
424 if(ev->value_mask & CWY)
425 c->y = sy + ev->y;
426 if(ev->value_mask & CWWidth)
427 c->w = ev->width;
428 if(ev->value_mask & CWHeight)
429 c->h = ev->height;
430 if((c->x - sx + c->w) > sw && c->isfloating)
431 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
432 if((c->y - sy + c->h) > sh && c->isfloating)
433 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
434 if((ev->value_mask & (CWX|CWY))
435 && !(ev->value_mask & (CWWidth|CWHeight)))
436 configure(c);
437 if(!c->isbanned)
438 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
439 }
440 else
441 configure(c);
442 }
443 else {
444 wc.x = ev->x;
445 wc.y = ev->y;
446 wc.width = ev->width;
447 wc.height = ev->height;
448 wc.border_width = ev->border_width;
449 wc.sibling = ev->above;
450 wc.stack_mode = ev->detail;
451 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
452 }
453 XSync(dpy, False);
454 }
455
456 void
457 destroynotify(XEvent *e) {
458 Client *c;
459 XDestroyWindowEvent *ev = &e->xdestroywindow;
460
461 if((c = getclient(ev->window)))
462 unmanage(c);
463 }
464
465 void
466 detach(Client *c) {
467 Client *i;
468
469 if (c != clients) {
470 for(i = clients; i->next != c; i = i->next);
471 i->next = c->next;
472 }
473 else {
474 clients = c->next;
475 }
476 c->next = NULL;
477 }
478
479 void
480 detachstack(Client *c) {
481 Client **tc;
482
483 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
484 *tc = c->snext;
485 }
486
487 void
488 drawbar(void) {
489 int i, x;
490 Client *c;
491
492 dc.x = 0;
493 for(c = stack; c && c->isbanned; c = c->snext);
494 for(i = 0; i < LENGTH(tags); i++) {
495 dc.w = TEXTW(tags[i]);
496 if(tagset[seltags] & 1 << i) {
497 drawtext(tags[i], dc.sel, isurgent(i));
498 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
499 }
500 else {
501 drawtext(tags[i], dc.norm, isurgent(i));
502 drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
503 }
504 dc.x += dc.w;
505 }
506 if(blw > 0) {
507 dc.w = blw;
508 drawtext(lt->symbol, dc.norm, ismax);
509 x = dc.x + dc.w;
510 }
511 else
512 x = dc.x;
513 dc.w = TEXTW(stext);
514 dc.x = ww - dc.w;
515 if(dc.x < x) {
516 dc.x = x;
517 dc.w = ww - x;
518 }
519 drawtext(stext, dc.norm, False);
520 if((dc.w = dc.x - x) > bh) {
521 dc.x = x;
522 if(c) {
523 drawtext(c->name, dc.sel, False);
524 drawsquare(c->isfixed, c->isfloating, False, dc.sel);
525 }
526 else
527 drawtext(NULL, dc.norm, False);
528 }
529 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
530 XSync(dpy, False);
531 }
532
533 void
534 drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) {
535 int x;
536 XGCValues gcv;
537 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
538
539 gcv.foreground = col[invert ? ColBG : ColFG];
540 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
541 x = (dc.font.ascent + dc.font.descent + 2) / 4;
542 r.x = dc.x + 1;
543 r.y = dc.y + 1;
544 if(filled) {
545 r.width = r.height = x + 1;
546 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
547 }
548 else if(empty) {
549 r.width = r.height = x;
550 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
551 }
552 }
553
554 void
555 drawtext(const char *text, ulong col[ColLast], Bool invert) {
556 int i, x, y, h, len, olen;
557 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
558 char buf[256];
559
560 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
561 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
562 if(!text)
563 return;
564 olen = strlen(text);
565 len = MIN(olen, sizeof buf);
566 memcpy(buf, text, len);
567 h = dc.font.ascent + dc.font.descent;
568 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
569 x = dc.x + (h / 2);
570 /* shorten text if necessary */
571 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
572 if(!len)
573 return;
574 if(len < olen)
575 for(i = len; i && i > len - 3; buf[--i] = '.');
576 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
577 if(dc.font.set)
578 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
579 else
580 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
581 }
582
583 void
584 enternotify(XEvent *e) {
585 Client *c;
586 XCrossingEvent *ev = &e->xcrossing;
587
588 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
589 return;
590 if((c = getclient(ev->window)))
591 focus(c);
592 else
593 focus(NULL);
594 }
595
596 void
597 eprint(const char *errstr, ...) {
598 va_list ap;
599
600 va_start(ap, errstr);
601 vfprintf(stderr, errstr, ap);
602 va_end(ap);
603 exit(EXIT_FAILURE);
604 }
605
606 void
607 expose(XEvent *e) {
608 XExposeEvent *ev = &e->xexpose;
609
610 if(ev->count == 0 && (ev->window == barwin))
611 drawbar();
612 }
613
614 void
615 focus(Client *c) {
616 if(!c || c->isbanned)
617 for(c = stack; c && c->isbanned; c = c->snext);
618 if(sel && sel != c) {
619 grabbuttons(sel, False);
620 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
621 }
622 if(c) {
623 detachstack(c);
624 attachstack(c);
625 grabbuttons(c, True);
626 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
627 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
628 }
629 else
630 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
631 sel = c;
632 drawbar();
633 }
634
635 void
636 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
637 XFocusChangeEvent *ev = &e->xfocus;
638
639 if(sel && ev->window != sel->win)
640 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
641 }
642
643 void
644 focusstack(const Arg *arg) {
645 Client *c = NULL, *i;
646
647 if(!sel)
648 return;
649 if (arg->i > 0) {
650 for(c = sel->next; c && c->isbanned; c = c->next);
651 if(!c)
652 for(c = clients; c && c->isbanned; c = c->next);
653 }
654 else {
655 for(i = clients; i != sel; i = i->next)
656 if (!i->isbanned)
657 c = i;
658 if(!c)
659 for(; i; i = i->next)
660 if (!i->isbanned)
661 c = i;
662 }
663 if(c) {
664 focus(c);
665 restack();
666 }
667 }
668
669 Client *
670 getclient(Window w) {
671 Client *c;
672
673 for(c = clients; c && c->win != w; c = c->next);
674 return c;
675 }
676
677 ulong
678 getcolor(const char *colstr) {
679 Colormap cmap = DefaultColormap(dpy, screen);
680 XColor color;
681
682 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
683 eprint("error, cannot allocate color '%s'\n", colstr);
684 return color.pixel;
685 }
686
687 long
688 getstate(Window w) {
689 int format, status;
690 long result = -1;
691 unsigned char *p = NULL;
692 ulong n, extra;
693 Atom real;
694
695 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
696 &real, &format, &n, &extra, (unsigned char **)&p);
697 if(status != Success)
698 return -1;
699 if(n != 0)
700 result = *p;
701 XFree(p);
702 return result;
703 }
704
705 Bool
706 gettextprop(Window w, Atom atom, char *text, uint size) {
707 char **list = NULL;
708 int n;
709 XTextProperty name;
710
711 if(!text || size == 0)
712 return False;
713 text[0] = '\0';
714 XGetTextProperty(dpy, w, &name, atom);
715 if(!name.nitems)
716 return False;
717 if(name.encoding == XA_STRING)
718 strncpy(text, (char *)name.value, size - 1);
719 else {
720 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
721 && n > 0 && *list) {
722 strncpy(text, *list, size - 1);
723 XFreeStringList(list);
724 }
725 }
726 text[size - 1] = '\0';
727 XFree(name.value);
728 return True;
729 }
730
731 void
732 grabbuttons(Client *c, Bool focused) {
733 int i, j;
734 uint buttons[] = { Button1, Button2, Button3 };
735 uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask, MODKEY|numlockmask|LockMask };
736
737 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
738 if(focused)
739 for(i = 0; i < LENGTH(buttons); i++)
740 for(j = 0; j < LENGTH(modifiers); j++)
741 XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
742 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
743 else
744 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
745 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
746 }
747
748 void
749 grabkeys(void) {
750 uint i, j;
751 KeyCode code;
752 XModifierKeymap *modmap;
753
754 /* init modifier map */
755 modmap = XGetModifierMapping(dpy);
756 for(i = 0; i < 8; i++)
757 for(j = 0; j < modmap->max_keypermod; j++) {
758 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
759 numlockmask = (1 << i);
760 }
761 XFreeModifiermap(modmap);
762
763 XUngrabKey(dpy, AnyKey, AnyModifier, root);
764 for(i = 0; i < LENGTH(keys); i++) {
765 code = XKeysymToKeycode(dpy, keys[i].keysym);
766 XGrabKey(dpy, code, keys[i].mod, root, True,
767 GrabModeAsync, GrabModeAsync);
768 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
769 GrabModeAsync, GrabModeAsync);
770 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
771 GrabModeAsync, GrabModeAsync);
772 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
773 GrabModeAsync, GrabModeAsync);
774 }
775 }
776
777 void
778 initfont(const char *fontstr) {
779 char *def, **missing;
780 int i, n;
781
782 missing = NULL;
783 if(dc.font.set)
784 XFreeFontSet(dpy, dc.font.set);
785 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
786 if(missing) {
787 while(n--)
788 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
789 XFreeStringList(missing);
790 }
791 if(dc.font.set) {
792 XFontSetExtents *font_extents;
793 XFontStruct **xfonts;
794 char **font_names;
795 dc.font.ascent = dc.font.descent = 0;
796 font_extents = XExtentsOfFontSet(dc.font.set);
797 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
798 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
799 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
800 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
801 xfonts++;
802 }
803 }
804 else {
805 if(dc.font.xfont)
806 XFreeFont(dpy, dc.font.xfont);
807 dc.font.xfont = NULL;
808 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
809 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
810 eprint("error, cannot load font: '%s'\n", fontstr);
811 dc.font.ascent = dc.font.xfont->ascent;
812 dc.font.descent = dc.font.xfont->descent;
813 }
814 dc.font.height = dc.font.ascent + dc.font.descent;
815 }
816
817 Bool
818 isoccupied(uint t) {
819 Client *c;
820
821 for(c = clients; c; c = c->next)
822 if(c->tags & 1 << t)
823 return True;
824 return False;
825 }
826
827 Bool
828 isprotodel(Client *c) {
829 int i, n;
830 Atom *protocols;
831 Bool ret = False;
832
833 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
834 for(i = 0; !ret && i < n; i++)
835 if(protocols[i] == wmatom[WMDelete])
836 ret = True;
837 XFree(protocols);
838 }
839 return ret;
840 }
841
842 Bool
843 isurgent(uint t) {
844 Client *c;
845
846 for(c = clients; c; c = c->next)
847 if(c->isurgent && c->tags & 1 << t)
848 return True;
849 return False;
850 }
851
852 void
853 keypress(XEvent *e) {
854 uint i;
855 KeySym keysym;
856 XKeyEvent *ev;
857
858 ev = &e->xkey;
859 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
860 for(i = 0; i < LENGTH(keys); i++)
861 if(keysym == keys[i].keysym
862 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
863 && keys[i].func)
864 keys[i].func(&(keys[i].arg));
865 }
866
867 void
868 killclient(const Arg *arg) {
869 XEvent ev;
870
871 if(!sel)
872 return;
873 if(isprotodel(sel)) {
874 ev.type = ClientMessage;
875 ev.xclient.window = sel->win;
876 ev.xclient.message_type = wmatom[WMProtocols];
877 ev.xclient.format = 32;
878 ev.xclient.data.l[0] = wmatom[WMDelete];
879 ev.xclient.data.l[1] = CurrentTime;
880 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
881 }
882 else
883 XKillClient(dpy, sel->win);
884 }
885
886 void
887 manage(Window w, XWindowAttributes *wa) {
888 Client *c, *t = NULL;
889 Status rettrans;
890 Window trans;
891 XWindowChanges wc;
892
893 if(!(c = calloc(1, sizeof(Client))))
894 eprint("fatal: could not calloc() %u bytes\n", sizeof(Client));
895 c->win = w;
896
897 /* geometry */
898 c->x = wa->x;
899 c->y = wa->y;
900 c->w = wa->width;
901 c->h = wa->height;
902 c->oldbw = wa->border_width;
903 if(c->w == sw && c->h == sh) {
904 c->x = sx;
905 c->y = sy;
906 c->bw = wa->border_width;
907 }
908 else {
909 if(c->x + c->w + 2 * c->bw > sx + sw)
910 c->x = sx + sw - c->w - 2 * c->bw;
911 if(c->y + c->h + 2 * c->bw > sy + sh)
912 c->y = sy + sh - c->h - 2 * c->bw;
913 c->x = MAX(c->x, sx);
914 c->y = MAX(c->y, by == 0 ? bh : sy);
915 c->bw = borderpx;
916 }
917
918 wc.border_width = c->bw;
919 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
920 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
921 configure(c); /* propagates border_width, if size doesn't change */
922 updatesizehints(c);
923 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
924 grabbuttons(c, False);
925 updatetitle(c);
926 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
927 for(t = clients; t && t->win != trans; t = t->next);
928 if(t)
929 c->tags = t->tags;
930 else
931 applyrules(c);
932 if(!c->isfloating)
933 c->isfloating = (rettrans == Success) || c->isfixed;
934 if(c->isfloating)
935 XRaiseWindow(dpy, c->win);
936 attach(c);
937 attachstack(c);
938 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
939 XMapWindow(dpy, c->win);
940 setclientstate(c, NormalState);
941 arrange();
942 }
943
944 void
945 mappingnotify(XEvent *e) {
946 XMappingEvent *ev = &e->xmapping;
947
948 XRefreshKeyboardMapping(ev);
949 if(ev->request == MappingKeyboard)
950 grabkeys();
951 }
952
953 void
954 maprequest(XEvent *e) {
955 static XWindowAttributes wa;
956 XMapRequestEvent *ev = &e->xmaprequest;
957
958 if(!XGetWindowAttributes(dpy, ev->window, &wa))
959 return;
960 if(wa.override_redirect)
961 return;
962 if(!getclient(ev->window))
963 manage(ev->window, &wa);
964 }
965
966 void
967 movemouse(const Arg *arg) {
968 int x1, y1, ocx, ocy, di, nx, ny;
969 uint dui;
970 Client *c;
971 Window dummy;
972 XEvent ev;
973
974 if(!(c = sel))
975 return;
976 restack();
977 ocx = nx = c->x;
978 ocy = ny = c->y;
979 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
980 None, cursor[CurMove], CurrentTime) != GrabSuccess)
981 return;
982 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
983 for(;;) {
984 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
985 switch (ev.type) {
986 case ButtonRelease:
987 XUngrabPointer(dpy, CurrentTime);
988 return;
989 case ConfigureRequest:
990 case Expose:
991 case MapRequest:
992 handler[ev.type](&ev);
993 break;
994 case MotionNotify:
995 XSync(dpy, False);
996 nx = ocx + (ev.xmotion.x - x1);
997 ny = ocy + (ev.xmotion.y - y1);
998 if(snap && nx >= wx && nx <= wx + ww
999 && ny >= wy && ny <= wy + wh) {
1000 if(abs(wx - nx) < snap)
1001 nx = wx;
1002 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1003 nx = wx + ww - c->w - 2 * c->bw;
1004 if(abs(wy - ny) < snap)
1005 ny = wy;
1006 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1007 ny = wy + wh - c->h - 2 * c->bw;
1008 if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1009 togglefloating(NULL);
1010 }
1011 if(!lt->arrange || c->isfloating)
1012 resize(c, nx, ny, c->w, c->h, False);
1013 break;
1014 }
1015 }
1016 }
1017
1018 Client *
1019 nexttiled(Client *c) {
1020 for(; c && (c->isfloating || c->isbanned); c = c->next);
1021 return c;
1022 }
1023
1024 void
1025 propertynotify(XEvent *e) {
1026 Client *c;
1027 Window trans;
1028 XPropertyEvent *ev = &e->xproperty;
1029
1030 if(ev->state == PropertyDelete)
1031 return; /* ignore */
1032 if((c = getclient(ev->window))) {
1033 switch (ev->atom) {
1034 default: break;
1035 case XA_WM_TRANSIENT_FOR:
1036 XGetTransientForHint(dpy, c->win, &trans);
1037 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1038 arrange();
1039 break;
1040 case XA_WM_NORMAL_HINTS:
1041 updatesizehints(c);
1042 break;
1043 case XA_WM_HINTS:
1044 updatewmhints(c);
1045 drawbar();
1046 break;
1047 }
1048 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1049 updatetitle(c);
1050 if(c == sel)
1051 drawbar();
1052 }
1053 }
1054 }
1055
1056 void
1057 quit(const Arg *arg) {
1058 readin = running = False;
1059 }
1060
1061 void
1062 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1063 XWindowChanges wc;
1064
1065 if(sizehints) {
1066 /* set minimum possible */
1067 w = MAX(1, w);
1068 h = MAX(1, h);
1069
1070 /* temporarily remove base dimensions */
1071 w -= c->basew;
1072 h -= c->baseh;
1073
1074 /* adjust for aspect limits */
1075 if(c->mina > 0 && c->maxa > 0) {
1076 if(c->maxa < (float) w/h)
1077 w = h * c->maxa;
1078 else if(c->mina > (float) h/w)
1079 h = w * c->mina;
1080 }
1081
1082 /* adjust for increment value */
1083 if(c->incw)
1084 w -= w % c->incw;
1085 if(c->inch)
1086 h -= h % c->inch;
1087
1088 /* restore base dimensions */
1089 w += c->basew;
1090 h += c->baseh;
1091
1092 w = MAX(w, c->minw);
1093 h = MAX(h, c->minh);
1094
1095 if (c->maxw)
1096 w = MIN(w, c->maxw);
1097
1098 if (c->maxh)
1099 h = MIN(h, c->maxh);
1100 }
1101 if(w <= 0 || h <= 0)
1102 return;
1103 if(x > sx + sw)
1104 x = sw - w - 2 * c->bw;
1105 if(y > sy + sh)
1106 y = sh - h - 2 * c->bw;
1107 if(x + w + 2 * c->bw < sx)
1108 x = sx;
1109 if(y + h + 2 * c->bw < sy)
1110 y = sy;
1111 if(h < bh)
1112 h = bh;
1113 if(w < bh)
1114 w = bh;
1115 if(c->x != x || c->y != y || c->w != w || c->h != h || c->ismoved) {
1116 c->ismoved = False;
1117 c->x = wc.x = x;
1118 c->y = wc.y = y;
1119 c->w = wc.width = w;
1120 c->h = wc.height = h;
1121 wc.border_width = c->bw;
1122 XConfigureWindow(dpy, c->win,
1123 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1124 configure(c);
1125 XSync(dpy, False);
1126 }
1127 }
1128
1129 void
1130 resizemouse(const Arg *arg) {
1131 int ocx, ocy;
1132 int nw, nh;
1133 Client *c;
1134 XEvent ev;
1135
1136 if(!(c = sel))
1137 return;
1138 restack();
1139 ocx = c->x;
1140 ocy = c->y;
1141 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1142 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1143 return;
1144 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1145 for(;;) {
1146 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1147 switch(ev.type) {
1148 case ButtonRelease:
1149 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1150 c->w + c->bw - 1, c->h + c->bw - 1);
1151 XUngrabPointer(dpy, CurrentTime);
1152 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1153 return;
1154 case ConfigureRequest:
1155 case Expose:
1156 case MapRequest:
1157 handler[ev.type](&ev);
1158 break;
1159 case MotionNotify:
1160 XSync(dpy, False);
1161 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1162 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1163
1164 if(snap && nw >= wx && nw <= wx + ww
1165 && nh >= wy && nh <= wy + wh) {
1166 if(!c->isfloating && lt->arrange
1167 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1168 togglefloating(NULL);
1169 }
1170 if(!lt->arrange || c->isfloating)
1171 resize(c, c->x, c->y, nw, nh, True);
1172 break;
1173 }
1174 }
1175 }
1176
1177 void
1178 restack(void) {
1179 Client *c;
1180 XEvent ev;
1181 XWindowChanges wc;
1182
1183 drawbar();
1184 if(!sel)
1185 return;
1186 if(ismax || sel->isfloating || !lt->arrange)
1187 XRaiseWindow(dpy, sel->win);
1188 if(!ismax && lt->arrange) {
1189 wc.stack_mode = Below;
1190 wc.sibling = barwin;
1191 for(c = stack; c; c = c->snext)
1192 if(!c->isfloating && !c->isbanned) {
1193 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1194 wc.sibling = c->win;
1195 }
1196 }
1197 XSync(dpy, False);
1198 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1199 }
1200
1201 void
1202 run(void) {
1203 char *p;
1204 char sbuf[sizeof stext];
1205 fd_set rd;
1206 int r, xfd;
1207 uint len, offset;
1208 XEvent ev;
1209
1210 /* main event loop, also reads status text from stdin */
1211 XSync(dpy, False);
1212 xfd = ConnectionNumber(dpy);
1213 readin = True;
1214 offset = 0;
1215 len = sizeof stext - 1;
1216 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1217 while(running) {
1218 FD_ZERO(&rd);
1219 if(readin)
1220 FD_SET(STDIN_FILENO, &rd);
1221 FD_SET(xfd, &rd);
1222 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1223 if(errno == EINTR)
1224 continue;
1225 eprint("select failed\n");
1226 }
1227 if(FD_ISSET(STDIN_FILENO, &rd)) {
1228 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1229 case -1:
1230 strncpy(stext, strerror(errno), len);
1231 readin = False;
1232 break;
1233 case 0:
1234 strncpy(stext, "EOF", 4);
1235 readin = False;
1236 break;
1237 default:
1238 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1239 if(*p == '\n' || *p == '\0') {
1240 *p = '\0';
1241 strncpy(stext, sbuf, len);
1242 p += r - 1; /* p is sbuf + offset + r - 1 */
1243 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1244 offset = r;
1245 if(r)
1246 memmove(sbuf, p - r + 1, r);
1247 break;
1248 }
1249 break;
1250 }
1251 drawbar();
1252 }
1253 while(XPending(dpy)) {
1254 XNextEvent(dpy, &ev);
1255 if(handler[ev.type])
1256 (handler[ev.type])(&ev); /* call handler */
1257 }
1258 }
1259 }
1260
1261 void
1262 scan(void) {
1263 uint i, num;
1264 Window *wins, d1, d2;
1265 XWindowAttributes wa;
1266
1267 wins = NULL;
1268 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1269 for(i = 0; i < num; i++) {
1270 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1271 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1272 continue;
1273 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1274 manage(wins[i], &wa);
1275 }
1276 for(i = 0; i < num; i++) { /* now the transients */
1277 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1278 continue;
1279 if(XGetTransientForHint(dpy, wins[i], &d1)
1280 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1281 manage(wins[i], &wa);
1282 }
1283 }
1284 if(wins)
1285 XFree(wins);
1286 }
1287
1288 void
1289 setclientstate(Client *c, long state) {
1290 long data[] = {state, None};
1291
1292 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1293 PropModeReplace, (unsigned char *)data, 2);
1294 }
1295
1296 /* arg > 1.0 will set mfact absolutly */
1297 void
1298 setmfact(const Arg *arg) {
1299 float f;
1300
1301 if(!arg || !lt->arrange)
1302 return;
1303 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1304 if(f < 0.1 || f > 0.9)
1305 return;
1306 mfact = f;
1307 arrange();
1308 }
1309
1310 void
1311 setup(void) {
1312 uint i;
1313 int w;
1314 XSetWindowAttributes wa;
1315
1316 /* init screen */
1317 screen = DefaultScreen(dpy);
1318 root = RootWindow(dpy, screen);
1319 initfont(font);
1320 sx = 0;
1321 sy = 0;
1322 sw = DisplayWidth(dpy, screen);
1323 sh = DisplayHeight(dpy, screen);
1324 bh = dc.h = dc.font.height + 2;
1325 lt = layouts;
1326 updategeom();
1327
1328 /* init atoms */
1329 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1330 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1331 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1332 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1333 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1334 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1335
1336 /* init cursors */
1337 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1338 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1339 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1340
1341 /* init appearance */
1342 dc.norm[ColBorder] = getcolor(normbordercolor);
1343 dc.norm[ColBG] = getcolor(normbgcolor);
1344 dc.norm[ColFG] = getcolor(normfgcolor);
1345 dc.sel[ColBorder] = getcolor(selbordercolor);
1346 dc.sel[ColBG] = getcolor(selbgcolor);
1347 dc.sel[ColFG] = getcolor(selfgcolor);
1348 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1349 dc.gc = XCreateGC(dpy, root, 0, 0);
1350 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1351 if(!dc.font.set)
1352 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1353
1354 /* init bar */
1355 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1356 w = TEXTW(layouts[i].symbol);
1357 blw = MAX(blw, w);
1358 }
1359
1360 wa.override_redirect = 1;
1361 wa.background_pixmap = ParentRelative;
1362 wa.event_mask = ButtonPressMask|ExposureMask;
1363
1364 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1365 CopyFromParent, DefaultVisual(dpy, screen),
1366 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1367 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1368 XMapRaised(dpy, barwin);
1369 strcpy(stext, "dwm-"VERSION);
1370 drawbar();
1371
1372 /* EWMH support per view */
1373 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1374 PropModeReplace, (unsigned char *) netatom, NetLast);
1375
1376 /* select for events */
1377 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1378 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1379 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1380 XSelectInput(dpy, root, wa.event_mask);
1381
1382
1383 /* grab keys */
1384 grabkeys();
1385 }
1386
1387 void
1388 spawn(const Arg *arg) {
1389 /* The double-fork construct avoids zombie processes and keeps the code
1390 * clean from stupid signal handlers. */
1391 if(fork() == 0) {
1392 if(fork() == 0) {
1393 if(dpy)
1394 close(ConnectionNumber(dpy));
1395 setsid();
1396 execvp(((char **)arg->v)[0], (char **)arg->v);
1397 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1398 perror(" failed");
1399 }
1400 exit(0);
1401 }
1402 wait(0);
1403 }
1404
1405 void
1406 tag(const Arg *arg) {
1407 if(sel && arg->ui & TAGMASK) {
1408 sel->tags = arg->ui & TAGMASK;
1409 arrange();
1410 }
1411 }
1412
1413 int
1414 textnw(const char *text, uint len) {
1415 XRectangle r;
1416
1417 if(dc.font.set) {
1418 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1419 return r.width;
1420 }
1421 return XTextWidth(dc.font.xfont, text, len);
1422 }
1423
1424 void
1425 tile(void) {
1426 int x, y, h, w, mw;
1427 uint i, n;
1428 Client *c;
1429
1430 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1431 if(n == 0)
1432 return;
1433
1434 /* master */
1435 c = nexttiled(clients);
1436 mw = mfact * ww;
1437 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1438
1439 if(--n == 0)
1440 return;
1441
1442 /* tile stack */
1443 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1444 y = wy;
1445 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1446 h = wh / n;
1447 if(h < bh)
1448 h = wh;
1449
1450 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1451 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1452 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1453 if(h != wh)
1454 y = c->y + c->h + 2 * c->bw;
1455 }
1456 }
1457
1458 void
1459 togglebar(const Arg *arg) {
1460 showbar = !showbar;
1461 updategeom();
1462 updatebar();
1463 arrange();
1464 }
1465
1466 void
1467 togglefloating(const Arg *arg) {
1468 if(!sel)
1469 return;
1470 sel->isfloating = !sel->isfloating || sel->isfixed;
1471 if(sel->isfloating)
1472 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1473 arrange();
1474 }
1475
1476 void
1477 togglelayout(const Arg *arg) {
1478 if(arg && arg->v)
1479 lt = (Layout *)arg->v;
1480 else if(++lt == &layouts[LENGTH(layouts)])
1481 lt = &layouts[0];
1482 if(sel)
1483 arrange();
1484 else
1485 drawbar();
1486 }
1487
1488 void
1489 togglemax(const Arg *arg) {
1490 ismax = !ismax;
1491 arrange();
1492 }
1493
1494 void
1495 toggletag(const Arg *arg) {
1496 if(sel && (sel->tags ^= (arg->ui & TAGMASK)))
1497 arrange();
1498 }
1499
1500 void
1501 toggleview(const Arg *arg) {
1502 if((tagset[seltags] ^= (arg->ui & TAGMASK)))
1503 arrange();
1504 }
1505
1506 void
1507 unmanage(Client *c) {
1508 XWindowChanges wc;
1509
1510 wc.border_width = c->oldbw;
1511 /* The server grab construct avoids race conditions. */
1512 XGrabServer(dpy);
1513 XSetErrorHandler(xerrordummy);
1514 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1515 detach(c);
1516 detachstack(c);
1517 if(sel == c)
1518 focus(NULL);
1519 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1520 setclientstate(c, WithdrawnState);
1521 free(c);
1522 XSync(dpy, False);
1523 XSetErrorHandler(xerror);
1524 XUngrabServer(dpy);
1525 arrange();
1526 }
1527
1528 void
1529 unmapnotify(XEvent *e) {
1530 Client *c;
1531 XUnmapEvent *ev = &e->xunmap;
1532
1533 if((c = getclient(ev->window)))
1534 unmanage(c);
1535 }
1536
1537 void
1538 updatebar(void) {
1539 if(dc.drawable != 0)
1540 XFreePixmap(dpy, dc.drawable);
1541 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1542 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1543 }
1544
1545 void
1546 updategeom(void) {
1547 #ifdef XINERAMA
1548 int i;
1549 XineramaScreenInfo *info = NULL;
1550
1551 /* window area geometry */
1552 if(XineramaIsActive(dpy)) {
1553 info = XineramaQueryScreens(dpy, &i);
1554 wx = info[xidx].x_org;
1555 wy = showbar && topbar ? info[xidx].y_org + bh : info[xidx].y_org;
1556 ww = info[xidx].width;
1557 wh = showbar ? info[xidx].height - bh : info[xidx].height;
1558 XFree(info);
1559 }
1560 else
1561 #endif
1562 {
1563 wx = sx;
1564 wy = showbar && topbar ? sy + bh : sy;
1565 ww = sw;
1566 wh = showbar ? sh - bh : sh;
1567 }
1568
1569 /* bar position */
1570 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1571 }
1572
1573 void
1574 updatesizehints(Client *c) {
1575 long msize;
1576 XSizeHints size;
1577
1578 XGetWMNormalHints(dpy, c->win, &size, &msize);
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, wmatom[WMName], c->name, sizeof c->name);
1625 }
1626
1627 void
1628 updatewmhints(Client *c) {
1629 XWMHints *wmh;
1630
1631 if((wmh = XGetWMHints(dpy, c->win))) {
1632 if(c == sel)
1633 sel->isurgent = False;
1634 else
1635 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1636 XFree(wmh);
1637 }
1638 }
1639
1640 void
1641 view(const Arg *arg) {
1642 seltags ^= 1; /* toggle sel tagset */
1643 if(arg && (arg->ui & TAGMASK))
1644 tagset[seltags] = arg->i & TAGMASK;
1645 arrange();
1646 }
1647
1648 /* There's no way to check accesses to destroyed windows, thus those cases are
1649 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1650 * default error handler, which may call exit. */
1651 int
1652 xerror(Display *dpy, XErrorEvent *ee) {
1653 if(ee->error_code == BadWindow
1654 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1655 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1656 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1657 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1658 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1659 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1660 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1661 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1662 return 0;
1663 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1664 ee->request_code, ee->error_code);
1665 return xerrorxlib(dpy, ee); /* may call exit */
1666 }
1667
1668 int
1669 xerrordummy(Display *dpy, XErrorEvent *ee) {
1670 return 0;
1671 }
1672
1673 /* Startup Error handler to check if another window manager
1674 * is already running. */
1675 int
1676 xerrorstart(Display *dpy, XErrorEvent *ee) {
1677 otherwm = True;
1678 return -1;
1679 }
1680
1681 void
1682 zoom(const Arg *arg) {
1683 Client *c = sel;
1684
1685 if(ismax || !lt->arrange || (sel && sel->isfloating))
1686 return;
1687 if(c == nexttiled(clients))
1688 if(!c || !(c = nexttiled(c->next)))
1689 return;
1690 detach(c);
1691 attach(c);
1692 focus(c);
1693 arrange();
1694 }
1695
1696 int
1697 main(int argc, char *argv[]) {
1698 if(argc == 2 && !strcmp("-v", argv[1]))
1699 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1700 else if(argc != 1)
1701 eprint("usage: dwm [-v]\n");
1702
1703 setlocale(LC_CTYPE, "");
1704 if(!(dpy = XOpenDisplay(0)))
1705 eprint("dwm: cannot open display\n");
1706
1707 checkotherwm();
1708 setup();
1709 scan();
1710 run();
1711 cleanup();
1712
1713 XCloseDisplay(dpy);
1714 return 0;
1715 }