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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 BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
48 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
49 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
50 #define ISVISIBLE(x) (x->tags & tagset[seltags])
51 #define LENGTH(x) (sizeof x / sizeof x[0])
52 #define MAX(a, b) ((a) > (b) ? (a) : (b))
53 #define MIN(a, b) ((a) < (b) ? (a) : (b))
54 #define MAXTAGLEN 16
55 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
56 #define NOBORDER(x) ((x) - 2 * c->bw)
57 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
58 #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
59
60 /* enums */
61 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
62 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
63 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
64 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
65 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
66 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
67
68 typedef union {
69 int i;
70 unsigned int ui;
71 float f;
72 void *v;
73 } Arg;
74
75 typedef struct {
76 unsigned int click;
77 unsigned int mask;
78 unsigned int button;
79 void (*func)(const Arg *arg);
80 const Arg arg;
81 } Button;
82
83 typedef struct Client Client;
84 struct Client {
85 char name[256];
86 float mina, maxa;
87 int x, y, w, h;
88 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
89 int bw, oldbw;
90 unsigned int tags;
91 Bool isfixed, isfloating, isurgent;
92 Client *next;
93 Client *snext;
94 Window win;
95 };
96
97 typedef struct {
98 int x, y, w, h;
99 unsigned long norm[ColLast];
100 unsigned long sel[ColLast];
101 Drawable drawable;
102 GC gc;
103 struct {
104 int ascent;
105 int descent;
106 int height;
107 XFontSet set;
108 XFontStruct *xfont;
109 } font;
110 } DC; /* draw context */
111
112 typedef struct {
113 unsigned int mod;
114 KeySym keysym;
115 void (*func)(const Arg *);
116 const Arg arg;
117 } Key;
118
119 typedef struct {
120 const char *symbol;
121 void (*arrange)(void);
122 } Layout;
123
124 typedef struct {
125 const char *class;
126 const char *instance;
127 const char *title;
128 unsigned int tags;
129 Bool isfloating;
130 } Rule;
131
132 /* function declarations */
133 static void applyrules(Client *c);
134 static void arrange(void);
135 static void attach(Client *c);
136 static void attachstack(Client *c);
137 static void buttonpress(XEvent *e);
138 static void checkotherwm(void);
139 static void cleanup(void);
140 static void clearurgent(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 die(const char *errstr, ...);
148 static void drawbar(void);
149 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
150 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
151 static void enternotify(XEvent *e);
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 unsigned long getcolor(const char *colstr);
158 static long getstate(Window w);
159 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
160 static void grabbuttons(Client *c, Bool focused);
161 static void grabkeys(void);
162 static void initfont(const char *fontstr);
163 static Bool isprotodel(Client *c);
164 static void keypress(XEvent *e);
165 static void killclient(const Arg *arg);
166 static void manage(Window w, XWindowAttributes *wa);
167 static void mappingnotify(XEvent *e);
168 static void maprequest(XEvent *e);
169 static void monocle(void);
170 static void movemouse(const Arg *arg);
171 static Client *nexttiled(Client *c);
172 static void propertynotify(XEvent *e);
173 static void quit(const Arg *arg);
174 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
175 static void resizemouse(const Arg *arg);
176 static void restack(void);
177 static void run(void);
178 static void scan(void);
179 static void setclientstate(Client *c, long state);
180 static void setlayout(const Arg *arg);
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, unsigned int len);
186 static void tile(void);
187 static void togglebar(const Arg *arg);
188 static void togglefloating(const Arg *arg);
189 static void toggletag(const Arg *arg);
190 static void toggleview(const Arg *arg);
191 static void unmanage(Client *c);
192 static void unmapnotify(XEvent *e);
193 static void updatebar(void);
194 static void updategeom(void);
195 static void updatenumlockmask(void);
196 static void updatesizehints(Client *c);
197 static void updatetitle(Client *c);
198 static void updatewmhints(Client *c);
199 static void view(const Arg *arg);
200 static int xerror(Display *dpy, XErrorEvent *ee);
201 static int xerrordummy(Display *dpy, XErrorEvent *ee);
202 static int xerrorstart(Display *dpy, XErrorEvent *ee);
203 static void zoom(const Arg *arg);
204
205 /* variables */
206 static char stext[256];
207 static int screen;
208 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
209 static int by, bh, blw; /* bar geometry y, height and layout symbol width */
210 static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
211 static unsigned int seltags = 0, sellt = 0;
212 static int (*xerrorxlib)(Display *, XErrorEvent *);
213 static unsigned int numlockmask = 0;
214 static void (*handler[LASTEvent]) (XEvent *) = {
215 [ButtonPress] = buttonpress,
216 [ConfigureRequest] = configurerequest,
217 [ConfigureNotify] = configurenotify,
218 [DestroyNotify] = destroynotify,
219 [EnterNotify] = enternotify,
220 [Expose] = expose,
221 [FocusIn] = focusin,
222 [KeyPress] = keypress,
223 [MappingNotify] = mappingnotify,
224 [MapRequest] = maprequest,
225 [PropertyNotify] = propertynotify,
226 [UnmapNotify] = unmapnotify
227 };
228 static Atom wmatom[WMLast], netatom[NetLast];
229 static Bool otherwm;
230 static Bool running = True;
231 static Client *clients = NULL;
232 static Client *sel = NULL;
233 static Client *stack = NULL;
234 static Cursor cursor[CurLast];
235 static Display *dpy;
236 static DC dc;
237 static Layout *lt[] = { NULL, NULL };
238 static Window root, barwin;
239 /* configuration, allows nested code to access above variables */
240 #include "config.h"
241
242 /* compile-time check if all tags fit into an unsigned int bit array. */
243 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
244
245 /* function implementations */
246 void
247 applyrules(Client *c) {
248 unsigned int i;
249 Rule *r;
250 XClassHint ch = { 0 };
251
252 /* rule matching */
253 if(XGetClassHint(dpy, c->win, &ch)) {
254 for(i = 0; i < LENGTH(rules); i++) {
255 r = &rules[i];
256 if((!r->title || strstr(c->name, r->title))
257 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
258 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
259 c->isfloating = r->isfloating;
260 c->tags |= r->tags & TAGMASK;
261 }
262 }
263 if(ch.res_class)
264 XFree(ch.res_class);
265 if(ch.res_name)
266 XFree(ch.res_name);
267 }
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(ISVISIBLE(c)) {
278 XMoveWindow(dpy, c->win, c->x, c->y);
279 if(!lt[sellt]->arrange || c->isfloating)
280 resize(c, c->x, c->y, c->w, c->h, True);
281 }
282 else {
283 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
284 }
285
286 focus(NULL);
287 if(lt[sellt]->arrange)
288 lt[sellt]->arrange();
289 restack();
290 }
291
292 void
293 attach(Client *c) {
294 c->next = clients;
295 clients = c;
296 }
297
298 void
299 attachstack(Client *c) {
300 c->snext = stack;
301 stack = c;
302 }
303
304 void
305 buttonpress(XEvent *e) {
306 unsigned int i, x, click;
307 Arg arg = {0};
308 Client *c;
309 XButtonPressedEvent *ev = &e->xbutton;
310
311 click = ClkRootWin;
312 if(ev->window == barwin) {
313 i = x = 0;
314 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
315 if(i < LENGTH(tags)) {
316 click = ClkTagBar;
317 arg.ui = 1 << i;
318 }
319 else if(ev->x < x + blw)
320 click = ClkLtSymbol;
321 else if(ev->x > wx + ww - TEXTW(stext))
322 click = ClkStatusText;
323 else
324 click = ClkWinTitle;
325 }
326 else if((c = getclient(ev->window))) {
327 focus(c);
328 click = ClkClientWin;
329 }
330
331 for(i = 0; i < LENGTH(buttons); i++)
332 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
333 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
334 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
335 }
336
337 void
338 checkotherwm(void) {
339 otherwm = False;
340 xerrorxlib = XSetErrorHandler(xerrorstart);
341
342 /* this causes an error if some other window manager is running */
343 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
344 XSync(dpy, False);
345 if(otherwm)
346 die("dwm: another window manager is already running\n");
347 XSetErrorHandler(xerror);
348 XSync(dpy, False);
349 }
350
351 void
352 cleanup(void) {
353 Arg a = {.ui = ~0};
354 Layout foo = { "", NULL };
355
356 close(STDIN_FILENO);
357 view(&a);
358 lt[sellt] = &foo;
359 while(stack)
360 unmanage(stack);
361 if(dc.font.set)
362 XFreeFontSet(dpy, dc.font.set);
363 else
364 XFreeFont(dpy, dc.font.xfont);
365 XUngrabKey(dpy, AnyKey, AnyModifier, root);
366 XFreePixmap(dpy, dc.drawable);
367 XFreeGC(dpy, dc.gc);
368 XFreeCursor(dpy, cursor[CurNormal]);
369 XFreeCursor(dpy, cursor[CurResize]);
370 XFreeCursor(dpy, cursor[CurMove]);
371 XDestroyWindow(dpy, barwin);
372 XSync(dpy, False);
373 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
374 }
375
376 void
377 clearurgent(void) {
378 XWMHints *wmh;
379 Client *c;
380
381 for(c = clients; c; c = c->next)
382 if(ISVISIBLE(c) && c->isurgent) {
383 c->isurgent = False;
384 if (!(wmh = XGetWMHints(dpy, c->win)))
385 continue;
386
387 wmh->flags &= ~XUrgencyHint;
388 XSetWMHints(dpy, c->win, wmh);
389 XFree(wmh);
390 }
391 }
392
393 void
394 configure(Client *c) {
395 XConfigureEvent ce;
396
397 ce.type = ConfigureNotify;
398 ce.display = dpy;
399 ce.event = c->win;
400 ce.window = c->win;
401 ce.x = c->x;
402 ce.y = c->y;
403 ce.width = c->w;
404 ce.height = c->h;
405 ce.border_width = c->bw;
406 ce.above = None;
407 ce.override_redirect = False;
408 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
409 }
410
411 void
412 configurenotify(XEvent *e) {
413 XConfigureEvent *ev = &e->xconfigure;
414
415 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
416 sw = ev->width;
417 sh = ev->height;
418 updategeom();
419 updatebar();
420 arrange();
421 }
422 }
423
424 void
425 configurerequest(XEvent *e) {
426 Client *c;
427 XConfigureRequestEvent *ev = &e->xconfigurerequest;
428 XWindowChanges wc;
429
430 if((c = getclient(ev->window))) {
431 if(ev->value_mask & CWBorderWidth)
432 c->bw = ev->border_width;
433 else if(c->isfloating || !lt[sellt]->arrange) {
434 if(ev->value_mask & CWX)
435 c->x = sx + ev->x;
436 if(ev->value_mask & CWY)
437 c->y = sy + ev->y;
438 if(ev->value_mask & CWWidth)
439 c->w = ev->width;
440 if(ev->value_mask & CWHeight)
441 c->h = ev->height;
442 if((c->x - sx + c->w) > sw && c->isfloating)
443 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
444 if((c->y - sy + c->h) > sh && c->isfloating)
445 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
446 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
447 configure(c);
448 if(ISVISIBLE(c))
449 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
450 }
451 else
452 configure(c);
453 }
454 else {
455 wc.x = ev->x;
456 wc.y = ev->y;
457 wc.width = ev->width;
458 wc.height = ev->height;
459 wc.border_width = ev->border_width;
460 wc.sibling = ev->above;
461 wc.stack_mode = ev->detail;
462 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
463 }
464 XSync(dpy, False);
465 }
466
467 void
468 destroynotify(XEvent *e) {
469 Client *c;
470 XDestroyWindowEvent *ev = &e->xdestroywindow;
471
472 if((c = getclient(ev->window)))
473 unmanage(c);
474 }
475
476 void
477 detach(Client *c) {
478 Client **tc;
479
480 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
481 *tc = c->next;
482 }
483
484 void
485 detachstack(Client *c) {
486 Client **tc;
487
488 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
489 *tc = c->snext;
490 }
491
492 void
493 die(const char *errstr, ...) {
494 va_list ap;
495
496 va_start(ap, errstr);
497 vfprintf(stderr, errstr, ap);
498 va_end(ap);
499 exit(EXIT_FAILURE);
500 }
501
502 void
503 drawbar(void) {
504 int x;
505 unsigned int i, occ = 0, urg = 0;
506 unsigned long *col;
507 Client *c;
508
509 for(c = clients; c; c = c->next) {
510 occ |= c->tags;
511 if(c->isurgent)
512 urg |= c->tags;
513 }
514
515 dc.x = 0;
516 for(i = 0; i < LENGTH(tags); i++) {
517 dc.w = TEXTW(tags[i]);
518 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
519 drawtext(tags[i], col, urg & 1 << i);
520 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
521 dc.x += dc.w;
522 }
523 if(blw > 0) {
524 dc.w = blw;
525 drawtext(lt[sellt]->symbol, dc.norm, False);
526 x = dc.x + dc.w;
527 }
528 else
529 x = dc.x;
530 dc.w = TEXTW(stext);
531 dc.x = ww - dc.w;
532 if(dc.x < x) {
533 dc.x = x;
534 dc.w = ww - x;
535 }
536 drawtext(stext, dc.norm, False);
537 if((dc.w = dc.x - x) > bh) {
538 dc.x = x;
539 if(sel) {
540 drawtext(sel->name, dc.sel, False);
541 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
542 }
543 else
544 drawtext(NULL, dc.norm, False);
545 }
546 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
547 XSync(dpy, False);
548 }
549
550 void
551 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
552 int x;
553 XGCValues gcv;
554 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
555
556 gcv.foreground = col[invert ? ColBG : ColFG];
557 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
558 x = (dc.font.ascent + dc.font.descent + 2) / 4;
559 r.x = dc.x + 1;
560 r.y = dc.y + 1;
561 if(filled) {
562 r.width = r.height = x + 1;
563 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
564 }
565 else if(empty) {
566 r.width = r.height = x;
567 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
568 }
569 }
570
571 void
572 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
573 char buf[256];
574 int i, x, y, h, len, olen;
575 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
576
577 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
578 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
579 if(!text)
580 return;
581 olen = strlen(text);
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 = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
587 if(!len)
588 return;
589 memcpy(buf, text, len);
590 if(len < olen)
591 for(i = len; i && i > len - 3; buf[--i] = '.');
592 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
593 if(dc.font.set)
594 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
595 else
596 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
597 }
598
599 void
600 enternotify(XEvent *e) {
601 Client *c;
602 XCrossingEvent *ev = &e->xcrossing;
603
604 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
605 return;
606 if((c = getclient(ev->window)))
607 focus(c);
608 else
609 focus(NULL);
610 }
611
612 void
613 expose(XEvent *e) {
614 XExposeEvent *ev = &e->xexpose;
615
616 if(ev->count == 0 && (ev->window == barwin))
617 drawbar();
618 }
619
620 void
621 focus(Client *c) {
622 if(!c || !ISVISIBLE(c))
623 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
624 if(sel && sel != c) {
625 grabbuttons(sel, False);
626 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
627 }
628 if(c) {
629 detachstack(c);
630 attachstack(c);
631 grabbuttons(c, True);
632 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
633 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
634 }
635 else
636 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
637 sel = c;
638 drawbar();
639 }
640
641 void
642 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
643 XFocusChangeEvent *ev = &e->xfocus;
644
645 if(sel && ev->window != sel->win)
646 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
647 }
648
649 void
650 focusstack(const Arg *arg) {
651 Client *c = NULL, *i;
652
653 if(!sel)
654 return;
655 if (arg->i > 0) {
656 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
657 if(!c)
658 for(c = clients; c && !ISVISIBLE(c); c = c->next);
659 }
660 else {
661 for(i = clients; i != sel; i = i->next)
662 if(ISVISIBLE(i))
663 c = i;
664 if(!c)
665 for(; i; i = i->next)
666 if(ISVISIBLE(i))
667 c = i;
668 }
669 if(c) {
670 focus(c);
671 restack();
672 }
673 }
674
675 Client *
676 getclient(Window w) {
677 Client *c;
678
679 for(c = clients; c && c->win != w; c = c->next);
680 return c;
681 }
682
683 unsigned long
684 getcolor(const char *colstr) {
685 Colormap cmap = DefaultColormap(dpy, screen);
686 XColor color;
687
688 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
689 die("error, cannot allocate color '%s'\n", colstr);
690 return color.pixel;
691 }
692
693 long
694 getstate(Window w) {
695 int format, status;
696 long result = -1;
697 unsigned char *p = NULL;
698 unsigned long n, extra;
699 Atom real;
700
701 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
702 &real, &format, &n, &extra, (unsigned char **)&p);
703 if(status != Success)
704 return -1;
705 if(n != 0)
706 result = *p;
707 XFree(p);
708 return result;
709 }
710
711 Bool
712 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
713 char **list = NULL;
714 int n;
715 XTextProperty name;
716
717 if(!text || size == 0)
718 return False;
719 text[0] = '\0';
720 XGetTextProperty(dpy, w, &name, atom);
721 if(!name.nitems)
722 return False;
723 if(name.encoding == XA_STRING)
724 strncpy(text, (char *)name.value, size - 1);
725 else {
726 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
727 && n > 0 && *list) {
728 strncpy(text, *list, size - 1);
729 XFreeStringList(list);
730 }
731 }
732 text[size - 1] = '\0';
733 XFree(name.value);
734 return True;
735 }
736
737 void
738 grabbuttons(Client *c, Bool focused) {
739 updatenumlockmask();
740 {
741 unsigned int i, j;
742 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
743 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
744 if(focused) {
745 for(i = 0; i < LENGTH(buttons); i++)
746 if(buttons[i].click == ClkClientWin)
747 for(j = 0; j < LENGTH(modifiers); j++)
748 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
749 } else
750 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
751 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
752 }
753 }
754
755 void
756 grabkeys(void) {
757 updatenumlockmask();
758 { /* grab keys */
759 unsigned int i, j;
760 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
761 KeyCode code;
762
763 XUngrabKey(dpy, AnyKey, AnyModifier, root);
764 for(i = 0; i < LENGTH(keys); i++) {
765 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
766 for(j = 0; j < LENGTH(modifiers); j++)
767 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
768 True, GrabModeAsync, GrabModeAsync);
769 }
770 }
771 }
772
773 void
774 initfont(const char *fontstr) {
775 char *def, **missing;
776 int i, n;
777
778 missing = NULL;
779 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
780 if(missing) {
781 while(n--)
782 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
783 XFreeStringList(missing);
784 }
785 if(dc.font.set) {
786 XFontSetExtents *font_extents;
787 XFontStruct **xfonts;
788 char **font_names;
789 dc.font.ascent = dc.font.descent = 0;
790 font_extents = XExtentsOfFontSet(dc.font.set);
791 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
792 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
793 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
794 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
795 xfonts++;
796 }
797 }
798 else {
799 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
800 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
801 die("error, cannot load font: '%s'\n", fontstr);
802 dc.font.ascent = dc.font.xfont->ascent;
803 dc.font.descent = dc.font.xfont->descent;
804 }
805 dc.font.height = dc.font.ascent + dc.font.descent;
806 }
807
808 Bool
809 isprotodel(Client *c) {
810 int i, n;
811 Atom *protocols;
812 Bool ret = False;
813
814 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
815 for(i = 0; !ret && i < n; i++)
816 if(protocols[i] == wmatom[WMDelete])
817 ret = True;
818 XFree(protocols);
819 }
820 return ret;
821 }
822
823 void
824 keypress(XEvent *e) {
825 unsigned int i;
826 KeySym keysym;
827 XKeyEvent *ev;
828
829 ev = &e->xkey;
830 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
831 for(i = 0; i < LENGTH(keys); i++)
832 if(keysym == keys[i].keysym
833 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
834 && keys[i].func)
835 keys[i].func(&(keys[i].arg));
836 }
837
838 void
839 killclient(const Arg *arg) {
840 XEvent ev;
841
842 if(!sel)
843 return;
844 if(isprotodel(sel)) {
845 ev.type = ClientMessage;
846 ev.xclient.window = sel->win;
847 ev.xclient.message_type = wmatom[WMProtocols];
848 ev.xclient.format = 32;
849 ev.xclient.data.l[0] = wmatom[WMDelete];
850 ev.xclient.data.l[1] = CurrentTime;
851 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
852 }
853 else
854 XKillClient(dpy, sel->win);
855 }
856
857 void
858 manage(Window w, XWindowAttributes *wa) {
859 Client *c, *t = NULL;
860 Window trans = None;
861 XWindowChanges wc;
862
863 if(!(c = calloc(1, sizeof(Client))))
864 die("fatal: could not calloc() %u bytes\n", sizeof(Client));
865 c->win = w;
866
867 /* geometry */
868 c->x = wa->x;
869 c->y = wa->y;
870 c->w = wa->width;
871 c->h = wa->height;
872 c->oldbw = wa->border_width;
873 if(c->w == sw && c->h == sh) {
874 c->x = sx;
875 c->y = sy;
876 c->bw = 0;
877 }
878 else {
879 if(c->x + c->w + 2 * c->bw > sx + sw)
880 c->x = sx + sw - NOBORDER(c->w);
881 if(c->y + c->h + 2 * c->bw > sy + sh)
882 c->y = sy + sh - NOBORDER(c->h);
883 c->x = MAX(c->x, sx);
884 /* only fix client y-offset, if the client center might cover the bar */
885 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
886 c->bw = borderpx;
887 }
888
889 wc.border_width = c->bw;
890 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
891 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
892 configure(c); /* propagates border_width, if size doesn't change */
893 updatesizehints(c);
894 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
895 grabbuttons(c, False);
896 updatetitle(c);
897 if(XGetTransientForHint(dpy, w, &trans))
898 t = getclient(trans);
899 if(t)
900 c->tags = t->tags;
901 else
902 applyrules(c);
903 if(!c->isfloating)
904 c->isfloating = trans != None || c->isfixed;
905 if(c->isfloating)
906 XRaiseWindow(dpy, c->win);
907 attach(c);
908 attachstack(c);
909 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
910 XMapWindow(dpy, c->win);
911 setclientstate(c, NormalState);
912 arrange();
913 }
914
915 void
916 mappingnotify(XEvent *e) {
917 XMappingEvent *ev = &e->xmapping;
918
919 XRefreshKeyboardMapping(ev);
920 if(ev->request == MappingKeyboard)
921 grabkeys();
922 }
923
924 void
925 maprequest(XEvent *e) {
926 static XWindowAttributes wa;
927 XMapRequestEvent *ev = &e->xmaprequest;
928
929 if(!XGetWindowAttributes(dpy, ev->window, &wa))
930 return;
931 if(wa.override_redirect)
932 return;
933 if(!getclient(ev->window))
934 manage(ev->window, &wa);
935 }
936
937 void
938 monocle(void) {
939 Client *c;
940
941 for(c = nexttiled(clients); c; c = nexttiled(c->next))
942 resize(c, wx, wy, NOBORDER(ww), NOBORDER(wh), resizehints);
943 }
944
945 void
946 movemouse(const Arg *arg) {
947 int x, y, ocx, ocy, di, nx, ny;
948 unsigned int dui;
949 Client *c;
950 Window dummy;
951 XEvent ev;
952
953 if(!(c = sel))
954 return;
955 restack();
956 ocx = c->x;
957 ocy = c->y;
958 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
959 None, cursor[CurMove], CurrentTime) != GrabSuccess)
960 return;
961 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
962 do {
963 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
964 switch (ev.type) {
965 case ConfigureRequest:
966 case Expose:
967 case MapRequest:
968 handler[ev.type](&ev);
969 break;
970 case MotionNotify:
971 XSync(dpy, False);
972 nx = ocx + (ev.xmotion.x - x);
973 ny = ocy + (ev.xmotion.y - y);
974 if(snap && nx >= wx && nx <= wx + ww
975 && ny >= wy && ny <= wy + wh) {
976 if(abs(wx - nx) < snap)
977 nx = wx;
978 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
979 nx = wx + ww - NOBORDER(c->w);
980 if(abs(wy - ny) < snap)
981 ny = wy;
982 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
983 ny = wy + wh - NOBORDER(c->h);
984 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
985 togglefloating(NULL);
986 }
987 if(!lt[sellt]->arrange || c->isfloating)
988 resize(c, nx, ny, c->w, c->h, False);
989 break;
990 }
991 }
992 while(ev.type != ButtonRelease);
993 XUngrabPointer(dpy, CurrentTime);
994 }
995
996 Client *
997 nexttiled(Client *c) {
998 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
999 return c;
1000 }
1001
1002 void
1003 propertynotify(XEvent *e) {
1004 Client *c;
1005 Window trans;
1006 XPropertyEvent *ev = &e->xproperty;
1007
1008 if(ev->state == PropertyDelete)
1009 return; /* ignore */
1010 if((c = getclient(ev->window))) {
1011 switch (ev->atom) {
1012 default: break;
1013 case XA_WM_TRANSIENT_FOR:
1014 XGetTransientForHint(dpy, c->win, &trans);
1015 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1016 arrange();
1017 break;
1018 case XA_WM_NORMAL_HINTS:
1019 updatesizehints(c);
1020 break;
1021 case XA_WM_HINTS:
1022 updatewmhints(c);
1023 drawbar();
1024 break;
1025 }
1026 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1027 updatetitle(c);
1028 if(c == sel)
1029 drawbar();
1030 }
1031 }
1032 }
1033
1034 void
1035 quit(const Arg *arg) {
1036 readin = running = False;
1037 }
1038
1039 void
1040 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1041 XWindowChanges wc;
1042
1043 if(sizehints) {
1044 /* see last two sentences in ICCCM 4.1.2.3 */
1045 Bool baseismin = c->basew == c->minw && c->baseh == c->minh;
1046
1047 /* set minimum possible */
1048 w = MAX(1, w);
1049 h = MAX(1, h);
1050
1051 if(!baseismin) { /* temporarily remove base dimensions */
1052 w -= c->basew;
1053 h -= c->baseh;
1054 }
1055
1056 /* adjust for aspect limits */
1057 if(c->mina > 0 && c->maxa > 0) {
1058 if(c->maxa < (float)w / h)
1059 w = h * c->maxa;
1060 else if(c->mina < (float)h / w)
1061 h = w * c->mina;
1062 }
1063
1064 if(baseismin) { /* increment calculation requires this */
1065 w -= c->basew;
1066 h -= c->baseh;
1067 }
1068
1069 /* adjust for increment value */
1070 if(c->incw)
1071 w -= w % c->incw;
1072 if(c->inch)
1073 h -= h % c->inch;
1074
1075 /* restore base dimensions */
1076 w += c->basew;
1077 h += c->baseh;
1078
1079 w = MAX(w, c->minw);
1080 h = MAX(h, c->minh);
1081
1082 if(c->maxw)
1083 w = MIN(w, c->maxw);
1084
1085 if(c->maxh)
1086 h = MIN(h, c->maxh);
1087 }
1088 if(w <= 0 || h <= 0)
1089 return;
1090 if(x > sx + sw)
1091 x = sw - NOBORDER(w);
1092 if(y > sy + sh)
1093 y = sh - NOBORDER(h);
1094 if(x + w + 2 * c->bw < sx)
1095 x = sx;
1096 if(y + h + 2 * c->bw < sy)
1097 y = sy;
1098 if(h < bh)
1099 h = bh;
1100 if(w < bh)
1101 w = bh;
1102 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1103 c->x = wc.x = x;
1104 c->y = wc.y = y;
1105 c->w = wc.width = w;
1106 c->h = wc.height = h;
1107 wc.border_width = c->bw;
1108 XConfigureWindow(dpy, c->win,
1109 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1110 configure(c);
1111 XSync(dpy, False);
1112 }
1113 }
1114
1115 void
1116 resizemouse(const Arg *arg) {
1117 int ocx, ocy;
1118 int nw, nh;
1119 Client *c;
1120 XEvent ev;
1121
1122 if(!(c = sel))
1123 return;
1124 restack();
1125 ocx = c->x;
1126 ocy = c->y;
1127 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1128 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1129 return;
1130 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1131 do {
1132 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1133 switch(ev.type) {
1134 case ConfigureRequest:
1135 case Expose:
1136 case MapRequest:
1137 handler[ev.type](&ev);
1138 break;
1139 case MotionNotify:
1140 XSync(dpy, False);
1141 nw = MAX(ev.xmotion.x - NOBORDER(ocx) + 1, 1);
1142 nh = MAX(ev.xmotion.y - NOBORDER(ocy) + 1, 1);
1143
1144 if(snap && nw >= wx && nw <= wx + ww
1145 && nh >= wy && nh <= wy + wh) {
1146 if(!c->isfloating && lt[sellt]->arrange
1147 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1148 togglefloating(NULL);
1149 }
1150 if(!lt[sellt]->arrange || c->isfloating)
1151 resize(c, c->x, c->y, nw, nh, True);
1152 break;
1153 }
1154 }
1155 while(ev.type != ButtonRelease);
1156 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1157 XUngrabPointer(dpy, CurrentTime);
1158 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1159 }
1160
1161 void
1162 restack(void) {
1163 Client *c;
1164 XEvent ev;
1165 XWindowChanges wc;
1166
1167 drawbar();
1168 if(!sel)
1169 return;
1170 if(sel->isfloating || !lt[sellt]->arrange)
1171 XRaiseWindow(dpy, sel->win);
1172 if(lt[sellt]->arrange) {
1173 wc.stack_mode = Below;
1174 wc.sibling = barwin;
1175 for(c = stack; c; c = c->snext)
1176 if(!c->isfloating && ISVISIBLE(c)) {
1177 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1178 wc.sibling = c->win;
1179 }
1180 }
1181 XSync(dpy, False);
1182 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1183 }
1184
1185 void
1186 run(void) {
1187 char *p;
1188 char sbuf[sizeof stext];
1189 fd_set rd;
1190 int r, xfd;
1191 unsigned int len, offset;
1192 XEvent ev;
1193
1194 /* main event loop, also reads status text from stdin */
1195 XSync(dpy, False);
1196 xfd = ConnectionNumber(dpy);
1197 offset = 0;
1198 len = sizeof stext - 1;
1199 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1200 while(running) {
1201 FD_ZERO(&rd);
1202 if(readin)
1203 FD_SET(STDIN_FILENO, &rd);
1204 FD_SET(xfd, &rd);
1205 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1206 if(errno == EINTR)
1207 continue;
1208 die("select failed\n");
1209 }
1210 if(FD_ISSET(STDIN_FILENO, &rd)) {
1211 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1212 case -1:
1213 strncpy(stext, strerror(errno), len);
1214 readin = False;
1215 break;
1216 case 0:
1217 strncpy(stext, "EOF", 4);
1218 readin = False;
1219 break;
1220 default:
1221 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1222 if(*p == '\n' || *p == '\0') {
1223 *p = '\0';
1224 strncpy(stext, sbuf, len);
1225 p += r - 1; /* p is sbuf + offset + r - 1 */
1226 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1227 offset = r;
1228 if(r)
1229 memmove(sbuf, p - r + 1, r);
1230 break;
1231 }
1232 break;
1233 }
1234 drawbar();
1235 }
1236 while(XPending(dpy)) {
1237 XNextEvent(dpy, &ev);
1238 if(handler[ev.type])
1239 (handler[ev.type])(&ev); /* call handler */
1240 }
1241 }
1242 }
1243
1244 void
1245 scan(void) {
1246 unsigned int i, num;
1247 Window d1, d2, *wins = NULL;
1248 XWindowAttributes wa;
1249
1250 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1251 for(i = 0; i < num; i++) {
1252 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1253 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1254 continue;
1255 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1256 manage(wins[i], &wa);
1257 }
1258 for(i = 0; i < num; i++) { /* now the transients */
1259 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1260 continue;
1261 if(XGetTransientForHint(dpy, wins[i], &d1)
1262 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1263 manage(wins[i], &wa);
1264 }
1265 if(wins)
1266 XFree(wins);
1267 }
1268 }
1269
1270 void
1271 setclientstate(Client *c, long state) {
1272 long data[] = {state, None};
1273
1274 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1275 PropModeReplace, (unsigned char *)data, 2);
1276 }
1277
1278 void
1279 setlayout(const Arg *arg) {
1280 if(!arg || !arg->v || arg->v != lt[sellt])
1281 sellt ^= 1;
1282 if(arg && arg->v)
1283 lt[sellt] = (Layout *)arg->v;
1284 if(sel)
1285 arrange();
1286 else
1287 drawbar();
1288 }
1289
1290 /* arg > 1.0 will set mfact absolutly */
1291 void
1292 setmfact(const Arg *arg) {
1293 float f;
1294
1295 if(!arg || !lt[sellt]->arrange)
1296 return;
1297 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1298 if(f < 0.1 || f > 0.9)
1299 return;
1300 mfact = f;
1301 arrange();
1302 }
1303
1304 void
1305 setup(void) {
1306 unsigned int i;
1307 int w;
1308 XSetWindowAttributes wa;
1309
1310 /* init screen */
1311 screen = DefaultScreen(dpy);
1312 root = RootWindow(dpy, screen);
1313 initfont(font);
1314 sx = 0;
1315 sy = 0;
1316 sw = DisplayWidth(dpy, screen);
1317 sh = DisplayHeight(dpy, screen);
1318 bh = dc.h = dc.font.height + 2;
1319 lt[0] = &layouts[0];
1320 lt[1] = &layouts[1 % LENGTH(layouts)];
1321 updategeom();
1322
1323 /* init atoms */
1324 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1325 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1326 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1327 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1328 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1329
1330 /* init cursors */
1331 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1332 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1333 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1334
1335 /* init appearance */
1336 dc.norm[ColBorder] = getcolor(normbordercolor);
1337 dc.norm[ColBG] = getcolor(normbgcolor);
1338 dc.norm[ColFG] = getcolor(normfgcolor);
1339 dc.sel[ColBorder] = getcolor(selbordercolor);
1340 dc.sel[ColBG] = getcolor(selbgcolor);
1341 dc.sel[ColFG] = getcolor(selfgcolor);
1342 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1343 dc.gc = XCreateGC(dpy, root, 0, 0);
1344 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1345 if(!dc.font.set)
1346 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1347
1348 /* init bar */
1349 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1350 w = TEXTW(layouts[i].symbol);
1351 blw = MAX(blw, w);
1352 }
1353
1354 wa.override_redirect = 1;
1355 wa.background_pixmap = ParentRelative;
1356 wa.event_mask = ButtonPressMask|ExposureMask;
1357
1358 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1359 CopyFromParent, DefaultVisual(dpy, screen),
1360 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1361 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1362 XMapRaised(dpy, barwin);
1363 strcpy(stext, "dwm-"VERSION);
1364 drawbar();
1365
1366 /* EWMH support per view */
1367 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1368 PropModeReplace, (unsigned char *) netatom, NetLast);
1369
1370 /* select for events */
1371 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1372 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1373 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1374 XSelectInput(dpy, root, wa.event_mask);
1375
1376 grabkeys();
1377 }
1378
1379 void
1380 spawn(const Arg *arg) {
1381 /* The double-fork construct avoids zombie processes and keeps the code
1382 * clean from stupid signal handlers. */
1383 if(fork() == 0) {
1384 if(fork() == 0) {
1385 if(dpy)
1386 close(ConnectionNumber(dpy));
1387 setsid();
1388 execvp(((char **)arg->v)[0], (char **)arg->v);
1389 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1390 perror(" failed");
1391 }
1392 exit(0);
1393 }
1394 wait(0);
1395 }
1396
1397 void
1398 tag(const Arg *arg) {
1399 if(sel && arg->ui & TAGMASK) {
1400 sel->tags = arg->ui & TAGMASK;
1401 arrange();
1402 }
1403 }
1404
1405 int
1406 textnw(const char *text, unsigned int len) {
1407 XRectangle r;
1408
1409 if(dc.font.set) {
1410 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1411 return r.width;
1412 }
1413 return XTextWidth(dc.font.xfont, text, len);
1414 }
1415
1416 void
1417 tile(void) {
1418 int x, y, h, w, mw;
1419 unsigned int i, n;
1420 Client *c;
1421
1422 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1423 if(n == 0)
1424 return;
1425
1426 /* master */
1427 c = nexttiled(clients);
1428 mw = mfact * ww;
1429 resize(c, wx, wy, NOBORDER(n == 1 ? ww : mw), NOBORDER(wh), resizehints);
1430
1431 if(--n == 0)
1432 return;
1433
1434 /* tile stack */
1435 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1436 y = wy;
1437 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1438 h = wh / n;
1439 if(h < bh)
1440 h = wh;
1441
1442 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1443 resize(c, x, y, NOBORDER(w), /* remainder */ ((i + 1 == n)
1444 ? NOBORDER(wy + wh) - y : h), resizehints);
1445 if(h != wh)
1446 y = c->y + c->h + 2 * c->bw;
1447 }
1448 }
1449
1450 void
1451 togglebar(const Arg *arg) {
1452 showbar = !showbar;
1453 updategeom();
1454 updatebar();
1455 arrange();
1456 }
1457
1458 void
1459 togglefloating(const Arg *arg) {
1460 if(!sel)
1461 return;
1462 sel->isfloating = !sel->isfloating || sel->isfixed;
1463 if(sel->isfloating)
1464 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1465 arrange();
1466 }
1467
1468 void
1469 toggletag(const Arg *arg) {
1470 unsigned int mask;
1471
1472 if (!sel)
1473 return;
1474
1475 mask = sel->tags ^ (arg->ui & TAGMASK);
1476 if(sel && mask) {
1477 sel->tags = mask;
1478 arrange();
1479 }
1480 }
1481
1482 void
1483 toggleview(const Arg *arg) {
1484 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1485
1486 if(mask) {
1487 tagset[seltags] = mask;
1488 clearurgent();
1489 arrange();
1490 }
1491 }
1492
1493 void
1494 unmanage(Client *c) {
1495 XWindowChanges wc;
1496
1497 wc.border_width = c->oldbw;
1498 /* The server grab construct avoids race conditions. */
1499 XGrabServer(dpy);
1500 XSetErrorHandler(xerrordummy);
1501 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1502 detach(c);
1503 detachstack(c);
1504 if(sel == c)
1505 focus(NULL);
1506 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1507 setclientstate(c, WithdrawnState);
1508 free(c);
1509 XSync(dpy, False);
1510 XSetErrorHandler(xerror);
1511 XUngrabServer(dpy);
1512 arrange();
1513 }
1514
1515 void
1516 unmapnotify(XEvent *e) {
1517 Client *c;
1518 XUnmapEvent *ev = &e->xunmap;
1519
1520 if((c = getclient(ev->window)))
1521 unmanage(c);
1522 }
1523
1524 void
1525 updatebar(void) {
1526 if(dc.drawable != 0)
1527 XFreePixmap(dpy, dc.drawable);
1528 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1529 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1530 }
1531
1532 void
1533 updategeom(void) {
1534 #ifdef XINERAMA
1535 int n, i = 0;
1536 XineramaScreenInfo *info = NULL;
1537
1538 /* window area geometry */
1539 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1540 if(n > 1) {
1541 int di, x, y;
1542 unsigned int dui;
1543 Window dummy;
1544 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1545 for(i = 0; i < n; i++)
1546 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1547 break;
1548 }
1549 wx = info[i].x_org;
1550 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1551 ww = info[i].width;
1552 wh = showbar ? info[i].height - bh : info[i].height;
1553 XFree(info);
1554 }
1555 else
1556 #endif
1557 {
1558 wx = sx;
1559 wy = showbar && topbar ? sy + bh : sy;
1560 ww = sw;
1561 wh = showbar ? sh - bh : sh;
1562 }
1563
1564 /* bar position */
1565 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1566 }
1567
1568 void
1569 updatenumlockmask(void) {
1570 unsigned int i, j;
1571 XModifierKeymap *modmap;
1572
1573 numlockmask = 0;
1574 modmap = XGetModifierMapping(dpy);
1575 for(i = 0; i < 8; i++)
1576 for(j = 0; j < modmap->max_keypermod; j++)
1577 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
1578 numlockmask = (1 << i);
1579 XFreeModifiermap(modmap);
1580 }
1581
1582 void
1583 updatesizehints(Client *c) {
1584 long msize;
1585 XSizeHints size;
1586
1587 XGetWMNormalHints(dpy, c->win, &size, &msize);
1588 if(size.flags & PBaseSize) {
1589 c->basew = size.base_width;
1590 c->baseh = size.base_height;
1591 }
1592 else if(size.flags & PMinSize) {
1593 c->basew = size.min_width;
1594 c->baseh = size.min_height;
1595 }
1596 else
1597 c->basew = c->baseh = 0;
1598 if(size.flags & PResizeInc) {
1599 c->incw = size.width_inc;
1600 c->inch = size.height_inc;
1601 }
1602 else
1603 c->incw = c->inch = 0;
1604 if(size.flags & PMaxSize) {
1605 c->maxw = size.max_width;
1606 c->maxh = size.max_height;
1607 }
1608 else
1609 c->maxw = c->maxh = 0;
1610 if(size.flags & PMinSize) {
1611 c->minw = size.min_width;
1612 c->minh = size.min_height;
1613 }
1614 else if(size.flags & PBaseSize) {
1615 c->minw = size.base_width;
1616 c->minh = size.base_height;
1617 }
1618 else
1619 c->minw = c->minh = 0;
1620 if(size.flags & PAspect) {
1621 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1622 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1623 }
1624 else
1625 c->maxa = c->mina = 0.0;
1626 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1627 && c->maxw == c->minw && c->maxh == c->minh);
1628 }
1629
1630 void
1631 updatetitle(Client *c) {
1632 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1633 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1634 }
1635
1636 void
1637 updatewmhints(Client *c) {
1638 XWMHints *wmh;
1639
1640 if((wmh = XGetWMHints(dpy, c->win))) {
1641 if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
1642 wmh->flags &= ~XUrgencyHint;
1643 XSetWMHints(dpy, c->win, wmh);
1644 }
1645 else
1646 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1647
1648 XFree(wmh);
1649 }
1650 }
1651
1652 void
1653 view(const Arg *arg) {
1654 if((arg->ui & TAGMASK) == tagset[seltags])
1655 return;
1656 seltags ^= 1; /* toggle sel tagset */
1657 if(arg->ui & TAGMASK)
1658 tagset[seltags] = arg->ui & TAGMASK;
1659 clearurgent();
1660 arrange();
1661 }
1662
1663 /* There's no way to check accesses to destroyed windows, thus those cases are
1664 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1665 * default error handler, which may call exit. */
1666 int
1667 xerror(Display *dpy, XErrorEvent *ee) {
1668 if(ee->error_code == BadWindow
1669 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1670 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1671 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1672 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1673 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1674 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1675 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1676 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1677 return 0;
1678 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1679 ee->request_code, ee->error_code);
1680 return xerrorxlib(dpy, ee); /* may call exit */
1681 }
1682
1683 int
1684 xerrordummy(Display *dpy, XErrorEvent *ee) {
1685 return 0;
1686 }
1687
1688 /* Startup Error handler to check if another window manager
1689 * is already running. */
1690 int
1691 xerrorstart(Display *dpy, XErrorEvent *ee) {
1692 otherwm = True;
1693 return -1;
1694 }
1695
1696 void
1697 zoom(const Arg *arg) {
1698 Client *c = sel;
1699
1700 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1701 return;
1702 if(c == nexttiled(clients))
1703 if(!c || !(c = nexttiled(c->next)))
1704 return;
1705 detach(c);
1706 attach(c);
1707 focus(c);
1708 arrange();
1709 }
1710
1711 int
1712 main(int argc, char *argv[]) {
1713 if(argc == 2 && !strcmp("-v", argv[1]))
1714 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1715 else if(argc != 1)
1716 die("usage: dwm [-v]\n");
1717
1718 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1719 fprintf(stderr, "warning: no locale support\n");
1720
1721 if(!(dpy = XOpenDisplay(0)))
1722 die("dwm: cannot open display\n");
1723
1724 checkotherwm();
1725 setup();
1726 scan();
1727 run();
1728 cleanup();
1729
1730 XCloseDisplay(dpy);
1731 return 0;
1732 }