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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 <stdarg.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32 #include <sys/select.h>
33 #include <sys/types.h>
34 #include <sys/wait.h>
35 #include <X11/cursorfont.h>
36 #include <X11/keysym.h>
37 #include <X11/Xatom.h>
38 #include <X11/Xlib.h>
39 #include <X11/Xproto.h>
40 #include <X11/Xutil.h>
41 #ifdef XINERAMA
42 #include <X11/extensions/Xinerama.h>
43 #endif
44
45 /* macros */
46 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
47 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
48 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
49 #define ISVISIBLE(x) (x->tags & tagset[seltags])
50 #define LENGTH(x) (sizeof x / sizeof x[0])
51 #define MAX(a, b) ((a) > (b) ? (a) : (b))
52 #define MIN(a, b) ((a) < (b) ? (a) : (b))
53 #define MAXTAGLEN 16
54 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
55 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
56 #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66 typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 void *v;
71 } Arg;
72
73 typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79 } Button;
80
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Window win;
93 };
94
95 typedef struct {
96 int x, y, w, h;
97 unsigned long norm[ColLast];
98 unsigned long sel[ColLast];
99 Drawable drawable;
100 GC gc;
101 struct {
102 int ascent;
103 int descent;
104 int height;
105 XFontSet set;
106 XFontStruct *xfont;
107 } font;
108 } DC; /* draw context */
109
110 typedef struct {
111 unsigned int mod;
112 KeySym keysym;
113 void (*func)(const Arg *);
114 const Arg arg;
115 } Key;
116
117 typedef struct {
118 const char *symbol;
119 void (*arrange)(void);
120 } Layout;
121
122 typedef struct {
123 const char *class;
124 const char *instance;
125 const char *title;
126 unsigned int tags;
127 Bool isfloating;
128 } Rule;
129
130 /* function declarations */
131 static void applyrules(Client *c);
132 static void arrange(void);
133 static void attach(Client *c);
134 static void attachstack(Client *c);
135 static void buttonpress(XEvent *e);
136 static void checkotherwm(void);
137 static void cleanup(void);
138 static void clearurgent(void);
139 static void configure(Client *c);
140 static void configurenotify(XEvent *e);
141 static void configurerequest(XEvent *e);
142 static void destroynotify(XEvent *e);
143 static void detach(Client *c);
144 static void detachstack(Client *c);
145 static void die(const char *errstr, ...);
146 static void drawbar(void);
147 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
148 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
149 static void enternotify(XEvent *e);
150 static void expose(XEvent *e);
151 static void focus(Client *c);
152 static void focusin(XEvent *e);
153 static void focusstack(const Arg *arg);
154 static Client *getclient(Window w);
155 static unsigned long getcolor(const char *colstr);
156 static long getstate(Window w);
157 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
158 static void grabbuttons(Client *c, Bool focused);
159 static void grabkeys(void);
160 static void initfont(const char *fontstr);
161 static Bool isprotodel(Client *c);
162 static void keypress(XEvent *e);
163 static void killclient(const Arg *arg);
164 static void manage(Window w, XWindowAttributes *wa);
165 static void mappingnotify(XEvent *e);
166 static void maprequest(XEvent *e);
167 static void monocle(void);
168 static void movemouse(const Arg *arg);
169 static Client *nexttiled(Client *c);
170 static void propertynotify(XEvent *e);
171 static void quit(const Arg *arg);
172 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
173 static void resizemouse(const Arg *arg);
174 static void restack(void);
175 static void run(void);
176 static void scan(void);
177 static void setclientstate(Client *c, long state);
178 static void setlayout(const Arg *arg);
179 static void setmfact(const Arg *arg);
180 static void setup(void);
181 static void spawn(const Arg *arg);
182 static void tag(const Arg *arg);
183 static int textnw(const char *text, unsigned int len);
184 static void tile(void);
185 static void togglebar(const Arg *arg);
186 static void togglefloating(const Arg *arg);
187 static void toggletag(const Arg *arg);
188 static void toggleview(const Arg *arg);
189 static void unmanage(Client *c);
190 static void unmapnotify(XEvent *e);
191 static void updatebar(void);
192 static void updategeom(void);
193 static void updatesizehints(Client *c);
194 static void updatetitle(Client *c);
195 static void updatewmhints(Client *c);
196 static void view(const Arg *arg);
197 static int xerror(Display *dpy, XErrorEvent *ee);
198 static int xerrordummy(Display *dpy, XErrorEvent *ee);
199 static int xerrorstart(Display *dpy, XErrorEvent *ee);
200 static void zoom(const Arg *arg);
201
202 /* variables */
203 static char stext[256];
204 static int screen;
205 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
206 static int by, bh, blw; /* bar geometry y, height and layout symbol width */
207 static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
208 static unsigned int seltags = 0, sellt = 0;
209 static int (*xerrorxlib)(Display *, XErrorEvent *);
210 static unsigned int numlockmask = 0;
211 static void (*handler[LASTEvent]) (XEvent *) = {
212 [ButtonPress] = buttonpress,
213 [ConfigureRequest] = configurerequest,
214 [ConfigureNotify] = configurenotify,
215 [DestroyNotify] = destroynotify,
216 [EnterNotify] = enternotify,
217 [Expose] = expose,
218 [FocusIn] = focusin,
219 [KeyPress] = keypress,
220 [MappingNotify] = mappingnotify,
221 [MapRequest] = maprequest,
222 [PropertyNotify] = propertynotify,
223 [UnmapNotify] = unmapnotify
224 };
225 static Atom wmatom[WMLast], netatom[NetLast];
226 static Bool otherwm;
227 static Bool running = True;
228 static unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
229 static Client *clients = NULL;
230 static Client *sel = NULL;
231 static Client *stack = NULL;
232 static Cursor cursor[CurLast];
233 static Display *dpy;
234 static DC dc = {0};
235 static Layout *lt[] = { NULL, NULL };
236 static Window root, barwin;
237 /* configuration, allows nested code to access above variables */
238 #include "config.h"
239
240 /* compile-time check if all tags fit into an unsigned int bit array. */
241 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
242
243 /* function implementations */
244 void
245 applyrules(Client *c) {
246 unsigned int i;
247 Rule *r;
248 XClassHint ch = { 0 };
249
250 /* rule matching */
251 XGetClassHint(dpy, c->win, &ch);
252 for(i = 0; i < LENGTH(rules); i++) {
253 r = &rules[i];
254 if((!r->title || strstr(c->name, r->title))
255 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
256 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
257 c->isfloating = r->isfloating;
258 c->tags |= r->tags & TAGMASK;
259 }
260 }
261 if(ch.res_class)
262 XFree(ch.res_class);
263 if(ch.res_name)
264 XFree(ch.res_name);
265 if(!c->tags)
266 c->tags = tagset[seltags];
267 }
268
269 void
270 arrange(void) {
271 Client *c;
272
273 for(c = clients; c; c = c->next)
274 if(ISVISIBLE(c)) {
275 XMoveWindow(dpy, c->win, c->x, c->y);
276 if(!lt[sellt]->arrange || c->isfloating)
277 resize(c, c->x, c->y, c->w, c->h, True);
278 }
279 else {
280 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
281 }
282
283 focus(NULL);
284 if(lt[sellt]->arrange)
285 lt[sellt]->arrange();
286 restack();
287 }
288
289 void
290 attach(Client *c) {
291 c->next = clients;
292 clients = c;
293 }
294
295 void
296 attachstack(Client *c) {
297 c->snext = stack;
298 stack = c;
299 }
300
301 void
302 buttonpress(XEvent *e) {
303 unsigned int i, x, click;
304 Arg arg = {0};
305 Client *c;
306 XButtonPressedEvent *ev = &e->xbutton;
307
308 click = ClkRootWin;
309 if(ev->window == barwin) {
310 i = x = 0;
311 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
312 if(i < LENGTH(tags)) {
313 click = ClkTagBar;
314 arg.ui = 1 << i;
315 }
316 else if(ev->x < x + blw)
317 click = ClkLtSymbol;
318 else if(ev->x > wx + ww - TEXTW(stext))
319 click = ClkStatusText;
320 else
321 click = ClkWinTitle;
322 }
323 else if((c = getclient(ev->window))) {
324 focus(c);
325 click = ClkClientWin;
326 }
327
328 for(i = 0; i < LENGTH(buttons); i++)
329 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
330 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
331 buttons[i].func(click == ClkTagBar ? &arg : &buttons[i].arg);
332 }
333
334 void
335 checkotherwm(void) {
336 otherwm = False;
337 XSetErrorHandler(xerrorstart);
338
339 /* this causes an error if some other window manager is running */
340 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
341 XSync(dpy, False);
342 if(otherwm)
343 die("dwm: another window manager is already running\n");
344 XSetErrorHandler(NULL);
345 xerrorxlib = XSetErrorHandler(xerror);
346 XSync(dpy, False);
347 }
348
349 void
350 cleanup(void) {
351 Arg a = {.ui = ~0};
352 Layout foo = { "", NULL };
353
354 close(STDIN_FILENO);
355 view(&a);
356 lt[sellt] = &foo;
357 while(stack)
358 unmanage(stack);
359 if(dc.font.set)
360 XFreeFontSet(dpy, dc.font.set);
361 else
362 XFreeFont(dpy, dc.font.xfont);
363 XUngrabKey(dpy, AnyKey, AnyModifier, root);
364 XFreePixmap(dpy, dc.drawable);
365 XFreeGC(dpy, dc.gc);
366 XFreeCursor(dpy, cursor[CurNormal]);
367 XFreeCursor(dpy, cursor[CurResize]);
368 XFreeCursor(dpy, cursor[CurMove]);
369 XDestroyWindow(dpy, barwin);
370 XSync(dpy, False);
371 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
372 }
373
374 void
375 clearurgent(void) {
376 XWMHints *wmh;
377 Client *c;
378
379 for(c = clients; c; c = c->next)
380 if(ISVISIBLE(c) && c->isurgent) {
381 c->isurgent = False;
382 if (!(wmh = XGetWMHints(dpy, c->win)))
383 continue;
384
385 wmh->flags &= ~XUrgencyHint;
386 XSetWMHints(dpy, c->win, wmh);
387 XFree(wmh);
388 }
389 }
390
391 void
392 configure(Client *c) {
393 XConfigureEvent ce;
394
395 ce.type = ConfigureNotify;
396 ce.display = dpy;
397 ce.event = c->win;
398 ce.window = c->win;
399 ce.x = c->x;
400 ce.y = c->y;
401 ce.width = c->w;
402 ce.height = c->h;
403 ce.border_width = c->bw;
404 ce.above = None;
405 ce.override_redirect = False;
406 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
407 }
408
409 void
410 configurenotify(XEvent *e) {
411 XConfigureEvent *ev = &e->xconfigure;
412
413 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
414 sw = ev->width;
415 sh = ev->height;
416 updategeom();
417 updatebar();
418 arrange();
419 }
420 }
421
422 void
423 configurerequest(XEvent *e) {
424 Client *c;
425 XConfigureRequestEvent *ev = &e->xconfigurerequest;
426 XWindowChanges wc;
427
428 if((c = getclient(ev->window))) {
429 if(ev->value_mask & CWBorderWidth)
430 c->bw = ev->border_width;
431 else if(c->isfloating || !lt[sellt]->arrange) {
432 if(ev->value_mask & CWX)
433 c->x = sx + ev->x;
434 if(ev->value_mask & CWY)
435 c->y = sy + ev->y;
436 if(ev->value_mask & CWWidth)
437 c->w = ev->width;
438 if(ev->value_mask & CWHeight)
439 c->h = ev->height;
440 if((c->x - sx + c->w) > sw && c->isfloating)
441 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
442 if((c->y - sy + c->h) > sh && c->isfloating)
443 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
444 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
445 configure(c);
446 if(ISVISIBLE(c))
447 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
448 }
449 else
450 configure(c);
451 }
452 else {
453 wc.x = ev->x;
454 wc.y = ev->y;
455 wc.width = ev->width;
456 wc.height = ev->height;
457 wc.border_width = ev->border_width;
458 wc.sibling = ev->above;
459 wc.stack_mode = ev->detail;
460 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
461 }
462 XSync(dpy, False);
463 }
464
465 void
466 destroynotify(XEvent *e) {
467 Client *c;
468 XDestroyWindowEvent *ev = &e->xdestroywindow;
469
470 if((c = getclient(ev->window)))
471 unmanage(c);
472 }
473
474 void
475 detach(Client *c) {
476 Client **tc;
477
478 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
479 *tc = c->next;
480 }
481
482 void
483 detachstack(Client *c) {
484 Client **tc;
485
486 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
487 *tc = c->snext;
488 }
489
490 void
491 die(const char *errstr, ...) {
492 va_list ap;
493
494 va_start(ap, errstr);
495 vfprintf(stderr, errstr, ap);
496 va_end(ap);
497 exit(EXIT_FAILURE);
498 }
499
500 void
501 drawbar(void) {
502 int x;
503 unsigned int i, occ = 0, urg = 0;
504 unsigned long *col;
505 Client *c;
506
507 for(c = clients; c; c = c->next) {
508 occ |= c->tags;
509 if(c->isurgent)
510 urg |= c->tags;
511 }
512
513 dc.x = 0;
514 for(i = 0; i < LENGTH(tags); i++) {
515 dc.w = TEXTW(tags[i]);
516 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
517 drawtext(tags[i], col, urg & 1 << i);
518 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
519 dc.x += dc.w;
520 }
521 if(blw > 0) {
522 dc.w = blw;
523 drawtext(lt[sellt]->symbol, dc.norm, False);
524 x = dc.x + dc.w;
525 }
526 else
527 x = dc.x;
528 dc.w = TEXTW(stext);
529 dc.x = ww - dc.w;
530 if(dc.x < x) {
531 dc.x = x;
532 dc.w = ww - x;
533 }
534 drawtext(stext, dc.norm, False);
535 if((dc.w = dc.x - x) > bh) {
536 dc.x = x;
537 if(sel) {
538 drawtext(sel->name, dc.sel, False);
539 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
540 }
541 else
542 drawtext(NULL, dc.norm, False);
543 }
544 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
545 XSync(dpy, False);
546 }
547
548 void
549 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
550 int x;
551 XGCValues gcv;
552 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
553
554 gcv.foreground = col[invert ? ColBG : ColFG];
555 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
556 x = (dc.font.ascent + dc.font.descent + 2) / 4;
557 r.x = dc.x + 1;
558 r.y = dc.y + 1;
559 if(filled) {
560 r.width = r.height = x + 1;
561 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
562 }
563 else if(empty) {
564 r.width = r.height = x;
565 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
566 }
567 }
568
569 void
570 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
571 char buf[256];
572 int i, x, y, h, len, olen;
573 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
574
575 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
576 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
577 if(!text)
578 return;
579 olen = strlen(text);
580 h = dc.font.ascent + dc.font.descent;
581 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
582 x = dc.x + (h / 2);
583 /* shorten text if necessary */
584 for(len = MIN(olen, sizeof buf); len && textnw(buf, len) > dc.w - h; len--);
585 if(!len)
586 return;
587 memcpy(buf, text, len);
588 if(len < olen)
589 for(i = len; i && i > len - 3; buf[--i] = '.');
590 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
591 if(dc.font.set)
592 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
593 else
594 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
595 }
596
597 void
598 enternotify(XEvent *e) {
599 Client *c;
600 XCrossingEvent *ev = &e->xcrossing;
601
602 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
603 return;
604 if((c = getclient(ev->window)))
605 focus(c);
606 else
607 focus(NULL);
608 }
609
610 void
611 expose(XEvent *e) {
612 XExposeEvent *ev = &e->xexpose;
613
614 if(ev->count == 0 && (ev->window == barwin))
615 drawbar();
616 }
617
618 void
619 focus(Client *c) {
620 if(!c || !ISVISIBLE(c))
621 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
622 if(sel && sel != c) {
623 grabbuttons(sel, False);
624 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
625 }
626 if(c) {
627 detachstack(c);
628 attachstack(c);
629 grabbuttons(c, True);
630 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
631 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
632 }
633 else
634 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
635 sel = c;
636 drawbar();
637 }
638
639 void
640 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
641 XFocusChangeEvent *ev = &e->xfocus;
642
643 if(sel && ev->window != sel->win)
644 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
645 }
646
647 void
648 focusstack(const Arg *arg) {
649 Client *c = NULL, *i;
650
651 if(!sel)
652 return;
653 if (arg->i > 0) {
654 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
655 if(!c)
656 for(c = clients; c && !ISVISIBLE(c); c = c->next);
657 }
658 else {
659 for(i = clients; i != sel; i = i->next)
660 if(ISVISIBLE(i))
661 c = i;
662 if(!c)
663 for(; i; i = i->next)
664 if(ISVISIBLE(i))
665 c = i;
666 }
667 if(c) {
668 focus(c);
669 restack();
670 }
671 }
672
673 Client *
674 getclient(Window w) {
675 Client *c;
676
677 for(c = clients; c && c->win != w; c = c->next);
678 return c;
679 }
680
681 unsigned long
682 getcolor(const char *colstr) {
683 Colormap cmap = DefaultColormap(dpy, screen);
684 XColor color;
685
686 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
687 die("error, cannot allocate color '%s'\n", colstr);
688 return color.pixel;
689 }
690
691 long
692 getstate(Window w) {
693 int format, status;
694 long result = -1;
695 unsigned char *p = NULL;
696 unsigned long n, extra;
697 Atom real;
698
699 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
700 &real, &format, &n, &extra, (unsigned char **)&p);
701 if(status != Success)
702 return -1;
703 if(n != 0)
704 result = *p;
705 XFree(p);
706 return result;
707 }
708
709 Bool
710 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
711 char **list = NULL;
712 int n;
713 XTextProperty name;
714
715 if(!text || size == 0)
716 return False;
717 text[0] = '\0';
718 XGetTextProperty(dpy, w, &name, atom);
719 if(!name.nitems)
720 return False;
721 if(name.encoding == XA_STRING)
722 strncpy(text, (char *)name.value, size - 1);
723 else {
724 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
725 && n > 0 && *list) {
726 strncpy(text, *list, size - 1);
727 XFreeStringList(list);
728 }
729 }
730 text[size - 1] = '\0';
731 XFree(name.value);
732 return True;
733 }
734
735 void
736 grabbuttons(Client *c, Bool focused) {
737 unsigned int i, j;
738 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
739
740 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
741 if(focused) {
742 for(i = 0; i < LENGTH(buttons); i++)
743 if(buttons[i].click == ClkClientWin)
744 for(j = 0; j < LENGTH(modifiers); j++)
745 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
746 } else
747 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
748 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
749 }
750
751 void
752 grabkeys(void) {
753 unsigned int i, j;
754 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
755 KeyCode code;
756 XModifierKeymap *modmap;
757
758 /* init modifier map */
759 modmap = XGetModifierMapping(dpy);
760 for(i = 0; i < 8; i++)
761 for(j = 0; j < modmap->max_keypermod; j++) {
762 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
763 numlockmask = (1 << i);
764 }
765 XFreeModifiermap(modmap);
766
767 XUngrabKey(dpy, AnyKey, AnyModifier, root);
768 for(i = 0; i < LENGTH(keys); i++) {
769 code = XKeysymToKeycode(dpy, keys[i].keysym);
770 for(j = 0; j < LENGTH(modifiers); j++)
771 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root, True,
772 GrabModeAsync, GrabModeAsync);
773 }
774 }
775
776 void
777 initfont(const char *fontstr) {
778 char *def, **missing;
779 int i, n;
780
781 missing = NULL;
782 if(dc.font.set)
783 XFreeFontSet(dpy, dc.font.set);
784 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
785 if(missing) {
786 while(n--)
787 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
788 XFreeStringList(missing);
789 }
790 if(dc.font.set) {
791 XFontSetExtents *font_extents;
792 XFontStruct **xfonts;
793 char **font_names;
794 dc.font.ascent = dc.font.descent = 0;
795 font_extents = XExtentsOfFontSet(dc.font.set);
796 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
797 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
798 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
799 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
800 xfonts++;
801 }
802 }
803 else {
804 if(dc.font.xfont)
805 XFreeFont(dpy, dc.font.xfont);
806 dc.font.xfont = NULL;
807 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
808 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
809 die("error, cannot load font: '%s'\n", fontstr);
810 dc.font.ascent = dc.font.xfont->ascent;
811 dc.font.descent = dc.font.xfont->descent;
812 }
813 dc.font.height = dc.font.ascent + dc.font.descent;
814 }
815
816 Bool
817 isprotodel(Client *c) {
818 int i, n;
819 Atom *protocols;
820 Bool ret = False;
821
822 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
823 for(i = 0; !ret && i < n; i++)
824 if(protocols[i] == wmatom[WMDelete])
825 ret = True;
826 XFree(protocols);
827 }
828 return ret;
829 }
830
831 void
832 keypress(XEvent *e) {
833 unsigned int i;
834 KeySym keysym;
835 XKeyEvent *ev;
836
837 ev = &e->xkey;
838 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
839 for(i = 0; i < LENGTH(keys); i++)
840 if(keysym == keys[i].keysym
841 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
842 && keys[i].func)
843 keys[i].func(&(keys[i].arg));
844 }
845
846 void
847 killclient(const Arg *arg) {
848 XEvent ev;
849
850 if(!sel)
851 return;
852 if(isprotodel(sel)) {
853 ev.type = ClientMessage;
854 ev.xclient.window = sel->win;
855 ev.xclient.message_type = wmatom[WMProtocols];
856 ev.xclient.format = 32;
857 ev.xclient.data.l[0] = wmatom[WMDelete];
858 ev.xclient.data.l[1] = CurrentTime;
859 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
860 }
861 else
862 XKillClient(dpy, sel->win);
863 }
864
865 void
866 manage(Window w, XWindowAttributes *wa) {
867 Client *c, *t = NULL;
868 Window trans = 0;
869 XWindowChanges wc;
870
871 if(!(c = calloc(1, sizeof(Client))))
872 die("fatal: could not calloc() %u bytes\n", sizeof(Client));
873 c->win = w;
874
875 /* geometry */
876 c->x = wa->x;
877 c->y = wa->y;
878 c->w = wa->width;
879 c->h = wa->height;
880 c->oldbw = wa->border_width;
881 if(c->w == sw && c->h == sh) {
882 c->x = sx;
883 c->y = sy;
884 c->bw = 0;
885 }
886 else {
887 if(c->x + c->w + 2 * c->bw > sx + sw)
888 c->x = sx + sw - c->w - 2 * c->bw;
889 if(c->y + c->h + 2 * c->bw > sy + sh)
890 c->y = sy + sh - c->h - 2 * c->bw;
891 c->x = MAX(c->x, sx);
892 /* only fix client y-offset, if the client center might cover the bar */
893 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
894 c->bw = borderpx;
895 }
896
897 wc.border_width = c->bw;
898 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
899 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
900 configure(c); /* propagates border_width, if size doesn't change */
901 updatesizehints(c);
902 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
903 grabbuttons(c, False);
904 updatetitle(c);
905 if(XGetTransientForHint(dpy, w, &trans))
906 t = getclient(trans);
907 if(t)
908 c->tags = t->tags;
909 else
910 applyrules(c);
911 if(!c->isfloating)
912 c->isfloating = trans || c->isfixed;
913 if(c->isfloating)
914 XRaiseWindow(dpy, c->win);
915 attach(c);
916 attachstack(c);
917 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
918 XMapWindow(dpy, c->win);
919 setclientstate(c, NormalState);
920 arrange();
921 }
922
923 void
924 mappingnotify(XEvent *e) {
925 XMappingEvent *ev = &e->xmapping;
926
927 XRefreshKeyboardMapping(ev);
928 if(ev->request == MappingKeyboard)
929 grabkeys();
930 }
931
932 void
933 maprequest(XEvent *e) {
934 static XWindowAttributes wa;
935 XMapRequestEvent *ev = &e->xmaprequest;
936
937 if(!XGetWindowAttributes(dpy, ev->window, &wa))
938 return;
939 if(wa.override_redirect)
940 return;
941 if(!getclient(ev->window))
942 manage(ev->window, &wa);
943 }
944
945 void
946 monocle(void) {
947 Client *c;
948
949 for(c = nexttiled(clients); c; c = nexttiled(c->next))
950 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
951 }
952
953 void
954 movemouse(const Arg *arg) {
955 int x, y, ocx, ocy, di, nx, ny;
956 unsigned int dui;
957 Client *c;
958 Window dummy;
959 XEvent ev;
960
961 if(!(c = sel))
962 return;
963 restack();
964 ocx = nx = c->x;
965 ocy = ny = c->y;
966 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
967 None, cursor[CurMove], CurrentTime) != GrabSuccess)
968 return;
969 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
970 for(;;) {
971 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
972 switch (ev.type) {
973 case ButtonRelease:
974 XUngrabPointer(dpy, CurrentTime);
975 return;
976 case ConfigureRequest:
977 case Expose:
978 case MapRequest:
979 handler[ev.type](&ev);
980 break;
981 case MotionNotify:
982 XSync(dpy, False);
983 nx = ocx + (ev.xmotion.x - x);
984 ny = ocy + (ev.xmotion.y - y);
985 if(snap && nx >= wx && nx <= wx + ww
986 && ny >= wy && ny <= wy + wh) {
987 if(abs(wx - nx) < snap)
988 nx = wx;
989 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
990 nx = wx + ww - c->w - 2 * c->bw;
991 if(abs(wy - ny) < snap)
992 ny = wy;
993 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
994 ny = wy + wh - c->h - 2 * c->bw;
995 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
996 togglefloating(NULL);
997 }
998 if(!lt[sellt]->arrange || c->isfloating)
999 resize(c, nx, ny, c->w, c->h, False);
1000 break;
1001 }
1002 }
1003 }
1004
1005 Client *
1006 nexttiled(Client *c) {
1007 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1008 return c;
1009 }
1010
1011 void
1012 propertynotify(XEvent *e) {
1013 Client *c;
1014 Window trans;
1015 XPropertyEvent *ev = &e->xproperty;
1016
1017 if(ev->state == PropertyDelete)
1018 return; /* ignore */
1019 if((c = getclient(ev->window))) {
1020 switch (ev->atom) {
1021 default: break;
1022 case XA_WM_TRANSIENT_FOR:
1023 XGetTransientForHint(dpy, c->win, &trans);
1024 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1025 arrange();
1026 break;
1027 case XA_WM_NORMAL_HINTS:
1028 updatesizehints(c);
1029 break;
1030 case XA_WM_HINTS:
1031 updatewmhints(c);
1032 drawbar();
1033 break;
1034 }
1035 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1036 updatetitle(c);
1037 if(c == sel)
1038 drawbar();
1039 }
1040 }
1041 }
1042
1043 void
1044 quit(const Arg *arg) {
1045 readin = running = False;
1046 }
1047
1048 void
1049 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1050 XWindowChanges wc;
1051
1052 if(sizehints) {
1053 /* set minimum possible */
1054 w = MAX(1, w);
1055 h = MAX(1, h);
1056
1057 /* temporarily remove base dimensions */
1058 w -= c->basew;
1059 h -= c->baseh;
1060
1061 /* adjust for aspect limits */
1062 if(c->mina > 0 && c->maxa > 0) {
1063 if(c->maxa < (float) w/h)
1064 w = h * c->maxa;
1065 else if(c->mina > (float) h/w)
1066 h = w * c->mina;
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 - w - 2 * c->bw;
1092 if(y > sy + sh)
1093 y = sh - h - 2 * c->bw;
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 for(;;) {
1132 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1133 switch(ev.type) {
1134 case ButtonRelease:
1135 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1136 c->w + c->bw - 1, c->h + c->bw - 1);
1137 XUngrabPointer(dpy, CurrentTime);
1138 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1139 return;
1140 case ConfigureRequest:
1141 case Expose:
1142 case MapRequest:
1143 handler[ev.type](&ev);
1144 break;
1145 case MotionNotify:
1146 XSync(dpy, False);
1147 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1148 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1149
1150 if(snap && nw >= wx && nw <= wx + ww
1151 && nh >= wy && nh <= wy + wh) {
1152 if(!c->isfloating && lt[sellt]->arrange
1153 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1154 togglefloating(NULL);
1155 }
1156 if(!lt[sellt]->arrange || c->isfloating)
1157 resize(c, c->x, c->y, nw, nh, True);
1158 break;
1159 }
1160 }
1161 }
1162
1163 void
1164 restack(void) {
1165 Client *c;
1166 XEvent ev;
1167 XWindowChanges wc;
1168
1169 drawbar();
1170 if(!sel)
1171 return;
1172 if(sel->isfloating || !lt[sellt]->arrange)
1173 XRaiseWindow(dpy, sel->win);
1174 if(lt[sellt]->arrange) {
1175 wc.stack_mode = Below;
1176 wc.sibling = barwin;
1177 for(c = stack; c; c = c->snext)
1178 if(!c->isfloating && ISVISIBLE(c)) {
1179 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1180 wc.sibling = c->win;
1181 }
1182 }
1183 XSync(dpy, False);
1184 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1185 }
1186
1187 void
1188 run(void) {
1189 char *p;
1190 char sbuf[sizeof stext];
1191 fd_set rd;
1192 int r, xfd;
1193 unsigned int len, offset;
1194 XEvent ev;
1195
1196 /* main event loop, also reads status text from stdin */
1197 XSync(dpy, False);
1198 xfd = ConnectionNumber(dpy);
1199 offset = 0;
1200 len = sizeof stext - 1;
1201 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1202 while(running) {
1203 FD_ZERO(&rd);
1204 if(readin)
1205 FD_SET(STDIN_FILENO, &rd);
1206 FD_SET(xfd, &rd);
1207 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1208 if(errno == EINTR)
1209 continue;
1210 die("select failed\n");
1211 }
1212 if(FD_ISSET(STDIN_FILENO, &rd)) {
1213 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1214 case -1:
1215 strncpy(stext, strerror(errno), len);
1216 readin = False;
1217 break;
1218 case 0:
1219 strncpy(stext, "EOF", 4);
1220 readin = False;
1221 break;
1222 default:
1223 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1224 if(*p == '\n' || *p == '\0') {
1225 *p = '\0';
1226 strncpy(stext, sbuf, len);
1227 p += r - 1; /* p is sbuf + offset + r - 1 */
1228 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1229 offset = r;
1230 if(r)
1231 memmove(sbuf, p - r + 1, r);
1232 break;
1233 }
1234 break;
1235 }
1236 drawbar();
1237 }
1238 while(XPending(dpy)) {
1239 XNextEvent(dpy, &ev);
1240 if(handler[ev.type])
1241 (handler[ev.type])(&ev); /* call handler */
1242 }
1243 }
1244 }
1245
1246 void
1247 scan(void) {
1248 unsigned int i, num;
1249 Window d1, d2, *wins = NULL;
1250 XWindowAttributes wa;
1251
1252 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1253 for(i = 0; i < num; i++) {
1254 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1255 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1256 continue;
1257 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1258 manage(wins[i], &wa);
1259 }
1260 for(i = 0; i < num; i++) { /* now the transients */
1261 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1262 continue;
1263 if(XGetTransientForHint(dpy, wins[i], &d1)
1264 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1265 manage(wins[i], &wa);
1266 }
1267 if(wins)
1268 XFree(wins);
1269 }
1270 }
1271
1272 void
1273 setclientstate(Client *c, long state) {
1274 long data[] = {state, None};
1275
1276 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1277 PropModeReplace, (unsigned char *)data, 2);
1278 }
1279
1280 void
1281 setlayout(const Arg *arg) {
1282 if(!arg || !arg->v || arg->v != lt[sellt])
1283 sellt ^= 1;
1284 if(arg && arg->v)
1285 lt[sellt] = (Layout *)arg->v;
1286 if(sel)
1287 arrange();
1288 else
1289 drawbar();
1290 }
1291
1292 /* arg > 1.0 will set mfact absolutly */
1293 void
1294 setmfact(const Arg *arg) {
1295 float f;
1296
1297 if(!arg || !lt[sellt]->arrange)
1298 return;
1299 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1300 if(f < 0.1 || f > 0.9)
1301 return;
1302 mfact = f;
1303 arrange();
1304 }
1305
1306 void
1307 setup(void) {
1308 unsigned int i;
1309 int w;
1310 XSetWindowAttributes wa;
1311
1312 /* init screen */
1313 screen = DefaultScreen(dpy);
1314 root = RootWindow(dpy, screen);
1315 initfont(font);
1316 sx = 0;
1317 sy = 0;
1318 sw = DisplayWidth(dpy, screen);
1319 sh = DisplayHeight(dpy, screen);
1320 bh = dc.h = dc.font.height + 2;
1321 lt[0] = &layouts[0];
1322 lt[1] = &layouts[1 % LENGTH(layouts)];
1323 updategeom();
1324
1325 /* init atoms */
1326 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1327 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1328 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1329 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1330 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1331 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1332
1333 /* init cursors */
1334 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1335 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1336 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1337
1338 /* init appearance */
1339 dc.norm[ColBorder] = getcolor(normbordercolor);
1340 dc.norm[ColBG] = getcolor(normbgcolor);
1341 dc.norm[ColFG] = getcolor(normfgcolor);
1342 dc.sel[ColBorder] = getcolor(selbordercolor);
1343 dc.sel[ColBG] = getcolor(selbgcolor);
1344 dc.sel[ColFG] = getcolor(selfgcolor);
1345 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1346 dc.gc = XCreateGC(dpy, root, 0, 0);
1347 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1348 if(!dc.font.set)
1349 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1350
1351 /* init bar */
1352 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1353 w = TEXTW(layouts[i].symbol);
1354 blw = MAX(blw, w);
1355 }
1356
1357 wa.override_redirect = 1;
1358 wa.background_pixmap = ParentRelative;
1359 wa.event_mask = ButtonPressMask|ExposureMask;
1360
1361 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1362 CopyFromParent, DefaultVisual(dpy, screen),
1363 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1364 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1365 XMapRaised(dpy, barwin);
1366 strcpy(stext, "dwm-"VERSION);
1367 drawbar();
1368
1369 /* EWMH support per view */
1370 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1371 PropModeReplace, (unsigned char *) netatom, NetLast);
1372
1373 /* select for events */
1374 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1375 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1376 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1377 XSelectInput(dpy, root, wa.event_mask);
1378
1379
1380 /* grab keys */
1381 grabkeys();
1382 }
1383
1384 void
1385 spawn(const Arg *arg) {
1386 /* The double-fork construct avoids zombie processes and keeps the code
1387 * clean from stupid signal handlers. */
1388 if(fork() == 0) {
1389 if(fork() == 0) {
1390 if(dpy)
1391 close(ConnectionNumber(dpy));
1392 setsid();
1393 execvp(((char **)arg->v)[0], (char **)arg->v);
1394 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1395 perror(" failed");
1396 }
1397 exit(0);
1398 }
1399 wait(0);
1400 }
1401
1402 void
1403 tag(const Arg *arg) {
1404 if(sel && arg->ui & TAGMASK) {
1405 sel->tags = arg->ui & TAGMASK;
1406 arrange();
1407 }
1408 }
1409
1410 int
1411 textnw(const char *text, unsigned int len) {
1412 XRectangle r;
1413
1414 if(dc.font.set) {
1415 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1416 return r.width;
1417 }
1418 return XTextWidth(dc.font.xfont, text, len);
1419 }
1420
1421 void
1422 tile(void) {
1423 int x, y, h, w, mw;
1424 unsigned int i, n;
1425 Client *c;
1426
1427 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1428 if(n == 0)
1429 return;
1430
1431 /* master */
1432 c = nexttiled(clients);
1433 mw = mfact * ww;
1434 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1435
1436 if(--n == 0)
1437 return;
1438
1439 /* tile stack */
1440 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1441 y = wy;
1442 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1443 h = wh / n;
1444 if(h < bh)
1445 h = wh;
1446
1447 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1448 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1449 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1450 if(h != wh)
1451 y = c->y + c->h + 2 * c->bw;
1452 }
1453 }
1454
1455 void
1456 togglebar(const Arg *arg) {
1457 showbar = !showbar;
1458 updategeom();
1459 updatebar();
1460 arrange();
1461 }
1462
1463 void
1464 togglefloating(const Arg *arg) {
1465 if(!sel)
1466 return;
1467 sel->isfloating = !sel->isfloating || sel->isfixed;
1468 if(sel->isfloating)
1469 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1470 arrange();
1471 }
1472
1473 void
1474 toggletag(const Arg *arg) {
1475 unsigned int mask = sel->tags ^ (arg->ui & TAGMASK);
1476
1477 if(sel && mask) {
1478 sel->tags = mask;
1479 arrange();
1480 }
1481 }
1482
1483 void
1484 toggleview(const Arg *arg) {
1485 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1486
1487 if(mask) {
1488 tagset[seltags] = mask;
1489 clearurgent();
1490 arrange();
1491 }
1492 }
1493
1494 void
1495 unmanage(Client *c) {
1496 XWindowChanges wc;
1497
1498 wc.border_width = c->oldbw;
1499 /* The server grab construct avoids race conditions. */
1500 XGrabServer(dpy);
1501 XSetErrorHandler(xerrordummy);
1502 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1503 detach(c);
1504 detachstack(c);
1505 if(sel == c)
1506 focus(NULL);
1507 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1508 setclientstate(c, WithdrawnState);
1509 free(c);
1510 XSync(dpy, False);
1511 XSetErrorHandler(xerror);
1512 XUngrabServer(dpy);
1513 arrange();
1514 }
1515
1516 void
1517 unmapnotify(XEvent *e) {
1518 Client *c;
1519 XUnmapEvent *ev = &e->xunmap;
1520
1521 if((c = getclient(ev->window)))
1522 unmanage(c);
1523 }
1524
1525 void
1526 updatebar(void) {
1527 if(dc.drawable != 0)
1528 XFreePixmap(dpy, dc.drawable);
1529 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1530 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1531 }
1532
1533 void
1534 updategeom(void) {
1535 #ifdef XINERAMA
1536 int n, i = 0;
1537 XineramaScreenInfo *info = NULL;
1538
1539 /* window area geometry */
1540 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1541 if(n > 1) {
1542 int di, x, y;
1543 unsigned int dui;
1544 Window dummy;
1545 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1546 for(i = 0; i < n; i++)
1547 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1548 break;
1549 }
1550 wx = info[i].x_org;
1551 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1552 ww = info[i].width;
1553 wh = showbar ? info[i].height - bh : info[i].height;
1554 XFree(info);
1555 }
1556 else
1557 #endif
1558 {
1559 wx = sx;
1560 wy = showbar && topbar ? sy + bh : sy;
1561 ww = sw;
1562 wh = showbar ? sh - bh : sh;
1563 }
1564
1565 /* bar position */
1566 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1567 }
1568
1569 void
1570 updatesizehints(Client *c) {
1571 long msize;
1572 XSizeHints size;
1573
1574 XGetWMNormalHints(dpy, c->win, &size, &msize);
1575 if(size.flags & PBaseSize) {
1576 c->basew = size.base_width;
1577 c->baseh = size.base_height;
1578 }
1579 else if(size.flags & PMinSize) {
1580 c->basew = size.min_width;
1581 c->baseh = size.min_height;
1582 }
1583 else
1584 c->basew = c->baseh = 0;
1585 if(size.flags & PResizeInc) {
1586 c->incw = size.width_inc;
1587 c->inch = size.height_inc;
1588 }
1589 else
1590 c->incw = c->inch = 0;
1591 if(size.flags & PMaxSize) {
1592 c->maxw = size.max_width;
1593 c->maxh = size.max_height;
1594 }
1595 else
1596 c->maxw = c->maxh = 0;
1597 if(size.flags & PMinSize) {
1598 c->minw = size.min_width;
1599 c->minh = size.min_height;
1600 }
1601 else if(size.flags & PBaseSize) {
1602 c->minw = size.base_width;
1603 c->minh = size.base_height;
1604 }
1605 else
1606 c->minw = c->minh = 0;
1607 if(size.flags & PAspect) {
1608 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1609 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1610 }
1611 else
1612 c->maxa = c->mina = 0.0;
1613 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1614 && c->maxw == c->minw && c->maxh == c->minh);
1615 }
1616
1617 void
1618 updatetitle(Client *c) {
1619 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1620 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1621 }
1622
1623 void
1624 updatewmhints(Client *c) {
1625 XWMHints *wmh;
1626
1627 if((wmh = XGetWMHints(dpy, c->win))) {
1628 if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
1629 wmh->flags &= ~XUrgencyHint;
1630 XSetWMHints(dpy, c->win, wmh);
1631 }
1632 else
1633 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1634
1635 XFree(wmh);
1636 }
1637 }
1638
1639 void
1640 view(const Arg *arg) {
1641 if((arg->ui & TAGMASK) == tagset[seltags])
1642 return;
1643 seltags ^= 1; /* toggle sel tagset */
1644 if(arg->ui & TAGMASK)
1645 tagset[seltags] = arg->ui & TAGMASK;
1646 clearurgent();
1647 arrange();
1648 }
1649
1650 /* There's no way to check accesses to destroyed windows, thus those cases are
1651 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1652 * default error handler, which may call exit. */
1653 int
1654 xerror(Display *dpy, XErrorEvent *ee) {
1655 if(ee->error_code == BadWindow
1656 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1657 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1658 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1659 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1660 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1661 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1662 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1663 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1664 return 0;
1665 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1666 ee->request_code, ee->error_code);
1667 return xerrorxlib(dpy, ee); /* may call exit */
1668 }
1669
1670 int
1671 xerrordummy(Display *dpy, XErrorEvent *ee) {
1672 return 0;
1673 }
1674
1675 /* Startup Error handler to check if another window manager
1676 * is already running. */
1677 int
1678 xerrorstart(Display *dpy, XErrorEvent *ee) {
1679 otherwm = True;
1680 return -1;
1681 }
1682
1683 void
1684 zoom(const Arg *arg) {
1685 Client *c = sel;
1686
1687 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1688 return;
1689 if(c == nexttiled(clients))
1690 if(!c || !(c = nexttiled(c->next)))
1691 return;
1692 detach(c);
1693 attach(c);
1694 focus(c);
1695 arrange();
1696 }
1697
1698 int
1699 main(int argc, char *argv[]) {
1700 if(argc == 2 && !strcmp("-v", argv[1]))
1701 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1702 else if(argc != 1)
1703 die("usage: dwm [-v]\n");
1704
1705 if(!XSupportsLocale())
1706 fprintf(stderr, "warning: no locale support\n");
1707
1708 if(!(dpy = XOpenDisplay(0)))
1709 die("dwm: cannot open display\n");
1710
1711 checkotherwm();
1712 setup();
1713 scan();
1714 run();
1715 cleanup();
1716
1717 XCloseDisplay(dpy);
1718 return 0;
1719 }