proceeded with multihead/Xinerama support
[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 an array of Bools of the same size as the
20 * global tags array to indicate the tags of a 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 <regex.h>
37 #include <X11/cursorfont.h>
38 #include <X11/keysym.h>
39 #include <X11/Xatom.h>
40 #include <X11/Xlib.h>
41 #include <X11/Xproto.h>
42 #include <X11/Xutil.h>
43 //#ifdef XINERAMA
44 #include <X11/extensions/Xinerama.h>
45 //#endif
46
47 /* macros */
48 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
49 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
50 #define LENGTH(x) (sizeof x / sizeof x[0])
51 #define MAXTAGLEN 16
52 #define MOUSEMASK (BUTTONMASK | PointerMotionMask)
53
54
55 /* enums */
56 enum { BarTop, BarBot, BarOff }; /* bar position */
57 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
58 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
59 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
60 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
61
62 /* typedefs */
63 typedef struct Client Client;
64 struct Client {
65 char name[256];
66 int x, y, w, h;
67 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
68 int minax, maxax, minay, maxay;
69 long flags;
70 unsigned int border, oldborder;
71 Bool isbanned, isfixed, isfloating;
72 Bool *tags;
73 Client *next;
74 Client *prev;
75 Client *snext;
76 Window win;
77 int monitor;
78 };
79
80 typedef struct {
81 int x, y, w, h;
82 unsigned long norm[ColLast];
83 unsigned long sel[ColLast];
84 Drawable drawable;
85 GC gc;
86 struct {
87 int ascent;
88 int descent;
89 int height;
90 XFontSet set;
91 XFontStruct *xfont;
92 } font;
93 } DC; /* draw context */
94
95 typedef struct {
96 unsigned long mod;
97 KeySym keysym;
98 void (*func)(const char *arg);
99 const char *arg;
100 } Key;
101
102 typedef struct {
103 const char *symbol;
104 void (*arrange)(void);
105 } Layout;
106
107 typedef struct {
108 const char *prop;
109 const char *tags;
110 Bool isfloating;
111 int monitor;
112 } Rule;
113
114 typedef struct {
115 regex_t *propregex;
116 regex_t *tagregex;
117 } Regs;
118
119 typedef struct {
120 int screen;
121 Window root;
122 Window barwin;
123 int sx, sy, sw, sh, wax, way, wah, waw;
124 DC dc;
125 Bool *seltags;
126 Bool *prevtags;
127 Layout *layout;
128 double mwfact;
129 } Monitor;
130
131 /* function declarations */
132 void applyrules(Client *c);
133 void arrange(void);
134 void attach(Client *c);
135 void attachstack(Client *c);
136 void ban(Client *c);
137 void buttonpress(XEvent *e);
138 void checkotherwm(void);
139 void cleanup(void);
140 void compileregs(void);
141 void configure(Client *c);
142 void configurenotify(XEvent *e);
143 void configurerequest(XEvent *e);
144 void destroynotify(XEvent *e);
145 void detach(Client *c);
146 void detachstack(Client *c);
147 void drawbar(void);
148 void drawsquare(Monitor *, Bool filled, Bool empty, unsigned long col[ColLast]);
149 void drawtext(Monitor *, const char *text, unsigned long col[ColLast]);
150 void *emallocz(unsigned int size);
151 void enternotify(XEvent *e);
152 void eprint(const char *errstr, ...);
153 void expose(XEvent *e);
154 void floating(void); /* default floating layout */
155 void focus(Client *c);
156 void focusin(XEvent *e);
157 void focusnext(const char *arg);
158 void focusprev(const char *arg);
159 Client *getclient(Window w);
160 unsigned long getcolor(const char *colstr, int screen);
161 long getstate(Window w);
162 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
163 void grabbuttons(Client *c, Bool focused);
164 void grabkeys(void);
165 unsigned int idxoftag(const char *tag);
166 void initfont(Monitor*, const char *fontstr);
167 Bool isoccupied(Monitor *m, unsigned int t);
168 Bool isprotodel(Client *c);
169 Bool isvisible(Client *c, Monitor *m);
170 void keypress(XEvent *e);
171 void killclient(const char *arg);
172 void manage(Window w, XWindowAttributes *wa);
173 void mappingnotify(XEvent *e);
174 void maprequest(XEvent *e);
175 void movemouse(Client *c);
176 Client *nexttiled(Client *c, Monitor *m);
177 void propertynotify(XEvent *e);
178 void quit(const char *arg);
179 void reapply(const char *arg);
180 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
181 void resizemouse(Client *c);
182 void restack(void);
183 void run(void);
184 void scan(void);
185 void setclientstate(Client *c, long state);
186 void setlayout(const char *arg);
187 void setmwfact(const char *arg);
188 void setup(void);
189 void spawn(const char *arg);
190 void tag(const char *arg);
191 unsigned int textnw(Monitor*, const char *text, unsigned int len);
192 unsigned int textw(Monitor*, const char *text);
193 void tile(void);
194 void togglebar(const char *arg);
195 void togglefloating(const char *arg);
196 void toggletag(const char *arg);
197 void toggleview(const char *arg);
198 void unban(Client *c);
199 void unmanage(Client *c);
200 void unmapnotify(XEvent *e);
201 void updatebarpos(Monitor *s);
202 void updatesizehints(Client *c);
203 void updatetitle(Client *c);
204 void view(const char *arg);
205 void viewprevtag(const char *arg); /* views previous selected tags */
206 int xerror(Display *dpy, XErrorEvent *ee);
207 int xerrordummy(Display *dsply, XErrorEvent *ee);
208 int xerrorstart(Display *dsply, XErrorEvent *ee);
209 void zoom(const char *arg);
210 int monitorat(int, int);
211 void movetomonitor(const char *arg);
212 void selectmonitor(const char *arg);
213
214 /* variables */
215 char stext[256];
216 int mcount = 1;
217 //double mwfact;
218 int (*xerrorxlib)(Display *, XErrorEvent *);
219 unsigned int bh, bpos;
220 unsigned int blw = 0;
221 unsigned int numlockmask = 0;
222 void (*handler[LASTEvent]) (XEvent *) = {
223 [ButtonPress] = buttonpress,
224 [ConfigureRequest] = configurerequest,
225 [ConfigureNotify] = configurenotify,
226 [DestroyNotify] = destroynotify,
227 [EnterNotify] = enternotify,
228 [Expose] = expose,
229 [FocusIn] = focusin,
230 [KeyPress] = keypress,
231 [MappingNotify] = mappingnotify,
232 [MapRequest] = maprequest,
233 [PropertyNotify] = propertynotify,
234 [UnmapNotify] = unmapnotify
235 };
236 Atom wmatom[WMLast], netatom[NetLast];
237 Bool domwfact = True;
238 Bool dozoom = True;
239 Bool otherwm, readin;
240 Bool running = True;
241 Client *clients = NULL;
242 Client *sel = NULL;
243 Client *stack = NULL;
244 Cursor cursor[CurLast];
245 Display *dpy;
246 DC dc = {0};
247 Regs *regs = NULL;
248 Monitor *monitors;
249 int selmonitor = 0;
250
251 /* configuration, allows nested code to access above variables */
252 #include "config.h"
253
254 //Bool prevtags[LENGTH(tags)];
255
256 /* function implementations */
257 void
258 applyrules(Client *c) {
259 static char buf[512];
260 unsigned int i, j;
261 regmatch_t tmp;
262 Bool matched_tag = False;
263 Bool matched_monitor = False;
264 XClassHint ch = { 0 };
265
266 /* rule matching */
267 XGetClassHint(dpy, c->win, &ch);
268 snprintf(buf, sizeof buf, "%s:%s:%s",
269 ch.res_class ? ch.res_class : "",
270 ch.res_name ? ch.res_name : "", c->name);
271 for(i = 0; i < LENGTH(rules); i++)
272 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
273 if (rules[i].monitor >= 0 && rules[i].monitor < mcount) {
274 matched_monitor = True;
275 c->monitor = rules[i].monitor;
276 }
277
278 c->isfloating = rules[i].isfloating;
279 for(j = 0; regs[i].tagregex && j < LENGTH(tags); j++) {
280 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
281 matched_tag = True;
282 c->tags[j] = True;
283 }
284 }
285 }
286 if(ch.res_class)
287 XFree(ch.res_class);
288 if(ch.res_name)
289 XFree(ch.res_name);
290 if(!matched_tag)
291 memcpy(c->tags, monitors[monitorat(-1, -1)].seltags, sizeof initags);
292 if (!matched_monitor)
293 c->monitor = monitorat(-1, -1);
294 }
295
296 void
297 arrange(void) {
298 Client *c;
299
300 for(c = clients; c; c = c->next)
301 if(isvisible(c, &monitors[c->monitor]))
302 unban(c);
303 else
304 ban(c);
305
306 monitors[selmonitor].layout->arrange();
307 focus(NULL);
308 restack();
309 }
310
311 void
312 attach(Client *c) {
313 if(clients)
314 clients->prev = c;
315 c->next = clients;
316 clients = c;
317 }
318
319 void
320 attachstack(Client *c) {
321 c->snext = stack;
322 stack = c;
323 }
324
325 void
326 ban(Client *c) {
327 if(c->isbanned)
328 return;
329 XMoveWindow(dpy, c->win, c->x + 3 * monitors[c->monitor].sw, c->y);
330 c->isbanned = True;
331 }
332
333 void
334 buttonpress(XEvent *e) {
335 unsigned int i, x;
336 Client *c;
337 XButtonPressedEvent *ev = &e->xbutton;
338
339 Monitor s = monitors[monitorat(-1, -1)];
340
341 if(ev->window == s.barwin) {
342 x = 0;
343 for(i = 0; i < LENGTH(tags); i++) {
344 x += textw(&s, tags[i]);
345 if(ev->x < x) {
346 if(ev->button == Button1) {
347 if(ev->state & MODKEY)
348 tag(tags[i]);
349 else
350 view(tags[i]);
351 }
352 else if(ev->button == Button3) {
353 if(ev->state & MODKEY)
354 toggletag(tags[i]);
355 else
356 toggleview(tags[i]);
357 }
358 return;
359 }
360 }
361 if((ev->x < x + blw) && ev->button == Button1)
362 setlayout(NULL);
363 }
364 else if((c = getclient(ev->window))) {
365 focus(c);
366 if(CLEANMASK(ev->state) != MODKEY)
367 return;
368 if(ev->button == Button1) {
369 if((s.layout->arrange == floating) || c->isfloating)
370 restack();
371 else
372 togglefloating(NULL);
373 movemouse(c);
374 }
375 else if(ev->button == Button2) {
376 if((floating != s.layout->arrange) && c->isfloating)
377 togglefloating(NULL);
378 else
379 zoom(NULL);
380 }
381 else if(ev->button == Button3 && !c->isfixed) {
382 if((floating == s.layout->arrange) || c->isfloating)
383 restack();
384 else
385 togglefloating(NULL);
386 resizemouse(c);
387 }
388 }
389 }
390
391 void
392 checkotherwm(void) {
393 otherwm = False;
394 XSetErrorHandler(xerrorstart);
395
396 /* this causes an error if some other window manager is running */
397 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
398 XSync(dpy, False);
399 if(otherwm)
400 eprint("dwm: another window manager is already running\n");
401 XSync(dpy, False);
402 XSetErrorHandler(NULL);
403 xerrorxlib = XSetErrorHandler(xerror);
404 XSync(dpy, False);
405 }
406
407 void
408 cleanup(void) {
409 unsigned int i;
410 close(STDIN_FILENO);
411 while(stack) {
412 unban(stack);
413 unmanage(stack);
414 }
415 for(i = 0; i < mcount; i++) {
416 Monitor *m = &monitors[i];
417 if(m->dc.font.set)
418 XFreeFontSet(dpy, m->dc.font.set);
419 else
420 XFreeFont(dpy, m->dc.font.xfont);
421 XUngrabKey(dpy, AnyKey, AnyModifier, m->root);
422 XFreePixmap(dpy, m->dc.drawable);
423 XFreeGC(dpy, m->dc.gc);
424 XDestroyWindow(dpy, m->barwin);
425 XFreeCursor(dpy, cursor[CurNormal]);
426 XFreeCursor(dpy, cursor[CurResize]);
427 XFreeCursor(dpy, cursor[CurMove]);
428 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
429 XSync(dpy, False);
430 }
431 }
432
433 void
434 compileregs(void) {
435 unsigned int i;
436 regex_t *reg;
437
438 if(regs)
439 return;
440 regs = emallocz(LENGTH(rules) * sizeof(Regs));
441 for(i = 0; i < LENGTH(rules); i++) {
442 if(rules[i].prop) {
443 reg = emallocz(sizeof(regex_t));
444 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
445 free(reg);
446 else
447 regs[i].propregex = reg;
448 }
449 if(rules[i].tags) {
450 reg = emallocz(sizeof(regex_t));
451 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
452 free(reg);
453 else
454 regs[i].tagregex = reg;
455 }
456 }
457 }
458
459 void
460 configure(Client *c) {
461 XConfigureEvent ce;
462
463 ce.type = ConfigureNotify;
464 ce.display = dpy;
465 ce.event = c->win;
466 ce.window = c->win;
467 ce.x = c->x;
468 ce.y = c->y;
469 ce.width = c->w;
470 ce.height = c->h;
471 ce.border_width = c->border;
472 ce.above = None;
473 ce.override_redirect = False;
474 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
475 }
476
477 void
478 configurenotify(XEvent *e) {
479 XConfigureEvent *ev = &e->xconfigure;
480 Monitor *m = &monitors[selmonitor];
481
482 if(ev->window == m->root && (ev->width != m->sw || ev->height != m->sh)) {
483 m->sw = ev->width;
484 m->sh = ev->height;
485 XFreePixmap(dpy, dc.drawable);
486 dc.drawable = XCreatePixmap(dpy, m->root, m->sw, bh, DefaultDepth(dpy, m->screen));
487 XResizeWindow(dpy, m->barwin, m->sw, bh);
488 updatebarpos(m);
489 arrange();
490 }
491 }
492
493 void
494 configurerequest(XEvent *e) {
495 Client *c;
496 XConfigureRequestEvent *ev = &e->xconfigurerequest;
497 XWindowChanges wc;
498
499 if((c = getclient(ev->window))) {
500 Monitor *m = &monitors[c->monitor];
501 if(ev->value_mask & CWBorderWidth)
502 c->border = ev->border_width;
503 if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
504 if(ev->value_mask & CWX)
505 c->x = m->sx+ev->x;
506 if(ev->value_mask & CWY)
507 c->y = m->sy+ev->y;
508 if(ev->value_mask & CWWidth)
509 c->w = ev->width;
510 if(ev->value_mask & CWHeight)
511 c->h = ev->height;
512 if((c->x - m->sx + c->w) > m->sw && c->isfloating)
513 c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
514 if((c->y - m->sy + c->h) > m->sh && c->isfloating)
515 c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
516 if((ev->value_mask & (CWX | CWY))
517 && !(ev->value_mask & (CWWidth | CWHeight)))
518 configure(c);
519 if(isvisible(c, &monitors[monitorat(-1,-1)]))
520 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
521 }
522 else
523 configure(c);
524 }
525 else {
526 wc.x = ev->x;
527 wc.y = ev->y;
528 wc.width = ev->width;
529 wc.height = ev->height;
530 wc.border_width = ev->border_width;
531 wc.sibling = ev->above;
532 wc.stack_mode = ev->detail;
533 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
534 }
535 XSync(dpy, False);
536 }
537
538 void
539 destroynotify(XEvent *e) {
540 Client *c;
541 XDestroyWindowEvent *ev = &e->xdestroywindow;
542
543 if((c = getclient(ev->window)))
544 unmanage(c);
545 }
546
547 void
548 detach(Client *c) {
549 if(c->prev)
550 c->prev->next = c->next;
551 if(c->next)
552 c->next->prev = c->prev;
553 if(c == clients)
554 clients = c->next;
555 c->next = c->prev = NULL;
556 }
557
558 void
559 detachstack(Client *c) {
560 Client **tc;
561
562 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
563 *tc = c->snext;
564 }
565
566 void
567 drawbar(void) {
568 int i, x, s;
569
570 for(s = 0; s < mcount; ++s) {
571 Monitor *m = &monitors[s];
572 m->dc.x = 0;
573 for(i = 0; i < LENGTH(tags); i++) {
574 m->dc.w = textw(m, tags[i]);
575 if(m->seltags[i]) {
576 drawtext(m, tags[i], m->dc.sel);
577 drawsquare(m, sel && sel->tags[i] && sel->monitor == selmonitor, isoccupied(m, i), m->dc.sel);
578 }
579 else {
580 drawtext(m, tags[i], m->dc.norm);
581 drawsquare(m, sel && sel->tags[i] && sel->monitor == selmonitor, isoccupied(m, i), m->dc.norm);
582 }
583 m->dc.x += m->dc.w;
584 }
585 m->dc.w = blw;
586 drawtext(m, m->layout->symbol, m->dc.norm);
587 x = m->dc.x + m->dc.w;
588 m->dc.w = textw(m, stext);
589 m->dc.x = m->sw - m->dc.w;
590 if(m->dc.x < x) {
591 m->dc.x = x;
592 m->dc.w = m->sw - x;
593 }
594 drawtext(m, stext, m->dc.norm);
595 if((m->dc.w = m->dc.x - x) > bh) {
596 m->dc.x = x;
597 if(sel && sel->monitor == selmonitor) {
598 drawtext(m, sel->name, m->dc.sel);
599 drawsquare(m, False, sel->isfloating, m->dc.sel);
600 }
601 else
602 drawtext(m, NULL, m->dc.norm);
603 }
604 XCopyArea(dpy, m->dc.drawable, m->barwin, m->dc.gc, 0, 0, m->sw, bh, 0, 0);
605 XSync(dpy, False);
606 }
607 }
608
609 void
610 drawsquare(Monitor *m, Bool filled, Bool empty, unsigned long col[ColLast]) {
611 int x;
612 XGCValues gcv;
613 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
614
615 gcv.foreground = col[ColFG];
616 XChangeGC(dpy, m->dc.gc, GCForeground, &gcv);
617 x = (m->dc.font.ascent + m->dc.font.descent + 2) / 4;
618 r.x = m->dc.x + 1;
619 r.y = m->dc.y + 1;
620 if(filled) {
621 r.width = r.height = x + 1;
622 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
623 }
624 else if(empty) {
625 r.width = r.height = x;
626 XDrawRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
627 }
628 }
629
630 void
631 drawtext(Monitor *m, const char *text, unsigned long col[ColLast]) {
632 int x, y, w, h;
633 static char buf[256];
634 unsigned int len, olen;
635 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
636
637 XSetForeground(dpy, m->dc.gc, col[ColBG]);
638 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
639 if(!text)
640 return;
641 w = 0;
642 olen = len = strlen(text);
643 if(len >= sizeof buf)
644 len = sizeof buf - 1;
645 memcpy(buf, text, len);
646 buf[len] = 0;
647 h = m->dc.font.ascent + m->dc.font.descent;
648 y = m->dc.y + (m->dc.h / 2) - (h / 2) + m->dc.font.ascent;
649 x = m->dc.x + (h / 2);
650 /* shorten text if necessary */
651 while(len && (w = textnw(m, buf, len)) > m->dc.w - h)
652 buf[--len] = 0;
653 if(len < olen) {
654 if(len > 1)
655 buf[len - 1] = '.';
656 if(len > 2)
657 buf[len - 2] = '.';
658 if(len > 3)
659 buf[len - 3] = '.';
660 }
661 if(w > m->dc.w)
662 return; /* too long */
663 XSetForeground(dpy, m->dc.gc, col[ColFG]);
664 if(m->dc.font.set)
665 XmbDrawString(dpy, m->dc.drawable, m->dc.font.set, m->dc.gc, x, y, buf, len);
666 else
667 XDrawString(dpy, m->dc.drawable, m->dc.gc, x, y, buf, len);
668 }
669
670 void *
671 emallocz(unsigned int size) {
672 void *res = calloc(1, size);
673
674 if(!res)
675 eprint("fatal: could not malloc() %u bytes\n", size);
676 return res;
677 }
678
679 void
680 enternotify(XEvent *e) {
681 unsigned int i;
682 Client *c;
683 XCrossingEvent *ev = &e->xcrossing;
684
685 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
686 return;
687 if((c = getclient(ev->window)))
688 focus(c);
689 else {
690 for(i = 0; i < mcount; i++)
691 if(ev->window == monitors[i].root) {
692 selmonitor = i;
693 focus(NULL);
694 break;
695 }
696 }
697 }
698
699 void
700 eprint(const char *errstr, ...) {
701 va_list ap;
702
703 va_start(ap, errstr);
704 vfprintf(stderr, errstr, ap);
705 va_end(ap);
706 exit(EXIT_FAILURE);
707 }
708
709 void
710 expose(XEvent *e) {
711 XExposeEvent *ev = &e->xexpose;
712
713 if(ev->count == 0) {
714 if(ev->window == monitors[selmonitor].barwin)
715 drawbar();
716 }
717 }
718
719 void
720 floating(void) { /* default floating layout */
721 Client *c;
722
723 domwfact = dozoom = False;
724 for(c = clients; c; c = c->next)
725 if(isvisible(c, &monitors[selmonitor]))
726 resize(c, c->x, c->y, c->w, c->h, True);
727 }
728
729 void
730 focus(Client *c) {
731 Monitor *m = &monitors[c ? c->monitor : selmonitor];
732 if(!c || (c && !isvisible(c, m)))
733 for(c = stack; c && !isvisible(c, m); c = c->snext);
734 if(sel && sel != c) {
735 grabbuttons(sel, False);
736 XSetWindowBorder(dpy, sel->win, monitors[sel->monitor].dc.norm[ColBorder]);
737 }
738 if(c) {
739 detachstack(c);
740 attachstack(c);
741 grabbuttons(c, True);
742 }
743 sel = c;
744 drawbar();
745 if(c) {
746 XSetWindowBorder(dpy, c->win, m->dc.sel[ColBorder]);
747 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
748 selmonitor = c->monitor;
749 }
750 else {
751 XSetInputFocus(dpy, m->root, RevertToPointerRoot, CurrentTime);
752 }
753 }
754
755 void
756 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
757 XFocusChangeEvent *ev = &e->xfocus;
758
759 if(sel && ev->window != sel->win)
760 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
761 }
762
763 void
764 focusnext(const char *arg) {
765 Client *c;
766 Monitor *m = &monitors[selmonitor];
767
768 if(!sel)
769 return;
770 for(c = sel->next; c && !isvisible(c, m); c = c->next);
771 if(!c)
772 for(c = clients; c && !isvisible(c, m); c = c->next);
773 if(c) {
774 focus(c);
775 restack();
776 }
777 }
778
779 void
780 focusprev(const char *arg) {
781 Client *c;
782 Monitor *m = &monitors[selmonitor];
783
784 if(!sel)
785 return;
786 for(c = sel->prev; c && !isvisible(c, m); c = c->prev);
787 if(!c) {
788 for(c = clients; c && c->next; c = c->next);
789 for(; c && !isvisible(c, m); c = c->prev);
790 }
791 if(c) {
792 focus(c);
793 restack();
794 }
795 }
796
797 Client *
798 getclient(Window w) {
799 Client *c;
800
801 for(c = clients; c && c->win != w; c = c->next);
802 return c;
803 }
804
805 unsigned long
806 getcolor(const char *colstr, int screen) {
807 Colormap cmap = DefaultColormap(dpy, screen);
808 XColor color;
809
810 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
811 eprint("error, cannot allocate color '%s'\n", colstr);
812 return color.pixel;
813 }
814
815 long
816 getstate(Window w) {
817 int format, status;
818 long result = -1;
819 unsigned char *p = NULL;
820 unsigned long n, extra;
821 Atom real;
822
823 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
824 &real, &format, &n, &extra, (unsigned char **)&p);
825 if(status != Success)
826 return -1;
827 if(n != 0)
828 result = *p;
829 XFree(p);
830 return result;
831 }
832
833 Bool
834 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
835 char **list = NULL;
836 int n;
837 XTextProperty name;
838
839 if(!text || size == 0)
840 return False;
841 text[0] = '\0';
842 XGetTextProperty(dpy, w, &name, atom);
843 if(!name.nitems)
844 return False;
845 if(name.encoding == XA_STRING)
846 strncpy(text, (char *)name.value, size - 1);
847 else {
848 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
849 && n > 0 && *list) {
850 strncpy(text, *list, size - 1);
851 XFreeStringList(list);
852 }
853 }
854 text[size - 1] = '\0';
855 XFree(name.value);
856 return True;
857 }
858
859 void
860 grabbuttons(Client *c, Bool focused) {
861 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
862
863 if(focused) {
864 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
865 GrabModeAsync, GrabModeSync, None, None);
866 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
867 GrabModeAsync, GrabModeSync, None, None);
868 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
869 GrabModeAsync, GrabModeSync, None, None);
870 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
871 GrabModeAsync, GrabModeSync, None, None);
872
873 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
874 GrabModeAsync, GrabModeSync, None, None);
875 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
876 GrabModeAsync, GrabModeSync, None, None);
877 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
878 GrabModeAsync, GrabModeSync, None, None);
879 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
880 GrabModeAsync, GrabModeSync, None, None);
881
882 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
883 GrabModeAsync, GrabModeSync, None, None);
884 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
885 GrabModeAsync, GrabModeSync, None, None);
886 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
887 GrabModeAsync, GrabModeSync, None, None);
888 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
889 GrabModeAsync, GrabModeSync, None, None);
890 }
891 else
892 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
893 GrabModeAsync, GrabModeSync, None, None);
894 }
895
896 void
897 grabkeys(void) {
898 unsigned int i, j;
899 KeyCode code;
900 XModifierKeymap *modmap;
901
902 /* init modifier map */
903 modmap = XGetModifierMapping(dpy);
904 for(i = 0; i < 8; i++)
905 for(j = 0; j < modmap->max_keypermod; j++) {
906 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
907 numlockmask = (1 << i);
908 }
909 XFreeModifiermap(modmap);
910
911 for(i = 0; i < mcount; i++) {
912 Monitor *m = &monitors[i];
913 XUngrabKey(dpy, AnyKey, AnyModifier, m->root);
914 for(j = 0; j < LENGTH(keys); j++) {
915 code = XKeysymToKeycode(dpy, keys[j].keysym);
916 XGrabKey(dpy, code, keys[j].mod, m->root, True,
917 GrabModeAsync, GrabModeAsync);
918 XGrabKey(dpy, code, keys[j].mod | LockMask, m->root, True,
919 GrabModeAsync, GrabModeAsync);
920 XGrabKey(dpy, code, keys[j].mod | numlockmask, m->root, True,
921 GrabModeAsync, GrabModeAsync);
922 XGrabKey(dpy, code, keys[j].mod | numlockmask | LockMask, m->root, True,
923 GrabModeAsync, GrabModeAsync);
924 }
925 }
926 }
927
928 unsigned int
929 idxoftag(const char *tag) {
930 unsigned int i;
931
932 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
933 return (i < LENGTH(tags)) ? i : 0;
934 }
935
936 void
937 initfont(Monitor *m, const char *fontstr) {
938 char *def, **missing;
939 int i, n;
940
941 missing = NULL;
942 if(m->dc.font.set)
943 XFreeFontSet(dpy, m->dc.font.set);
944 m->dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
945 if(missing) {
946 while(n--)
947 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
948 XFreeStringList(missing);
949 }
950 if(m->dc.font.set) {
951 XFontSetExtents *font_extents;
952 XFontStruct **xfonts;
953 char **font_names;
954 m->dc.font.ascent = m->dc.font.descent = 0;
955 font_extents = XExtentsOfFontSet(m->dc.font.set);
956 n = XFontsOfFontSet(m->dc.font.set, &xfonts, &font_names);
957 for(i = 0, m->dc.font.ascent = 0, m->dc.font.descent = 0; i < n; i++) {
958 if(m->dc.font.ascent < (*xfonts)->ascent)
959 m->dc.font.ascent = (*xfonts)->ascent;
960 if(m->dc.font.descent < (*xfonts)->descent)
961 m->dc.font.descent = (*xfonts)->descent;
962 xfonts++;
963 }
964 }
965 else {
966 if(m->dc.font.xfont)
967 XFreeFont(dpy, m->dc.font.xfont);
968 m->dc.font.xfont = NULL;
969 if(!(m->dc.font.xfont = XLoadQueryFont(dpy, fontstr))
970 && !(m->dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
971 eprint("error, cannot load font: '%s'\n", fontstr);
972 m->dc.font.ascent = m->dc.font.xfont->ascent;
973 m->dc.font.descent = m->dc.font.xfont->descent;
974 }
975 m->dc.font.height = m->dc.font.ascent + m->dc.font.descent;
976 }
977
978 Bool
979 isoccupied(Monitor *m, unsigned int t) {
980 Client *c;
981
982 for(c = clients; c; c = c->next)
983 if(c->tags[t] && c->monitor == selmonitor)
984 return True;
985 return False;
986 }
987
988 Bool
989 isprotodel(Client *c) {
990 int i, n;
991 Atom *protocols;
992 Bool ret = False;
993
994 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
995 for(i = 0; !ret && i < n; i++)
996 if(protocols[i] == wmatom[WMDelete])
997 ret = True;
998 XFree(protocols);
999 }
1000 return ret;
1001 }
1002
1003 Bool
1004 isvisible(Client *c, Monitor *m) {
1005 unsigned int i;
1006
1007 for(i = 0; i < LENGTH(tags); i++)
1008 if(c->tags[i] && monitors[c->monitor].seltags[i] && c->monitor == selmonitor)
1009 return True;
1010 return False;
1011 }
1012
1013 void
1014 keypress(XEvent *e) {
1015 unsigned int i;
1016 KeySym keysym;
1017 XKeyEvent *ev;
1018
1019 ev = &e->xkey;
1020 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1021 for(i = 0; i < LENGTH(keys); i++)
1022 if(keysym == keys[i].keysym
1023 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1024 {
1025 if(keys[i].func)
1026 keys[i].func(keys[i].arg);
1027 }
1028 }
1029
1030 void
1031 killclient(const char *arg) {
1032 XEvent ev;
1033
1034 if(!sel)
1035 return;
1036 if(isprotodel(sel)) {
1037 ev.type = ClientMessage;
1038 ev.xclient.window = sel->win;
1039 ev.xclient.message_type = wmatom[WMProtocols];
1040 ev.xclient.format = 32;
1041 ev.xclient.data.l[0] = wmatom[WMDelete];
1042 ev.xclient.data.l[1] = CurrentTime;
1043 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1044 }
1045 else
1046 XKillClient(dpy, sel->win);
1047 }
1048
1049 void
1050 manage(Window w, XWindowAttributes *wa) {
1051 Client *c, *t = NULL;
1052 Monitor *m = &monitors[selmonitor];
1053 Status rettrans;
1054 Window trans;
1055 XWindowChanges wc;
1056
1057 c = emallocz(sizeof(Client));
1058 c->tags = emallocz(sizeof initags);
1059 c->win = w;
1060
1061 applyrules(c);
1062
1063 c->x = wa->x + m->sx;
1064 c->y = wa->y + m->sy;
1065 c->w = wa->width;
1066 c->h = wa->height;
1067 c->oldborder = wa->border_width;
1068
1069 if (monitorat(c->x, c->y) != c->monitor) {
1070 c->x = m->sx;
1071 c->y = m->sy;
1072 }
1073
1074 if(c->w == m->sw && c->h == m->sh) {
1075 c->x = m->sx;
1076 c->y = m->sy;
1077 c->border = wa->border_width;
1078 }
1079 else {
1080 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1081 c->x = m->wax + m->waw - c->w - 2 * c->border;
1082 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1083 c->y = m->way + m->wah - c->h - 2 * c->border;
1084 if(c->x < m->wax)
1085 c->x = m->wax;
1086 if(c->y < m->way)
1087 c->y = m->way;
1088 c->border = BORDERPX;
1089 }
1090 wc.border_width = c->border;
1091 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1092 XSetWindowBorder(dpy, w, m->dc.norm[ColBorder]);
1093 configure(c); /* propagates border_width, if size doesn't change */
1094 updatesizehints(c);
1095 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1096 grabbuttons(c, False);
1097 updatetitle(c);
1098 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1099 for(t = clients; t && t->win != trans; t = t->next);
1100 if(t)
1101 memcpy(c->tags, t->tags, sizeof initags);
1102 if(!c->isfloating)
1103 c->isfloating = (rettrans == Success) || c->isfixed;
1104 attach(c);
1105 attachstack(c);
1106 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1107 ban(c);
1108 XMapWindow(dpy, c->win);
1109 setclientstate(c, NormalState);
1110 arrange();
1111 }
1112
1113 void
1114 mappingnotify(XEvent *e) {
1115 XMappingEvent *ev = &e->xmapping;
1116
1117 XRefreshKeyboardMapping(ev);
1118 if(ev->request == MappingKeyboard)
1119 grabkeys();
1120 }
1121
1122 void
1123 maprequest(XEvent *e) {
1124 static XWindowAttributes wa;
1125 XMapRequestEvent *ev = &e->xmaprequest;
1126
1127 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1128 return;
1129 if(wa.override_redirect)
1130 return;
1131 if(!getclient(ev->window))
1132 manage(ev->window, &wa);
1133 }
1134
1135 void
1136 movemouse(Client *c) {
1137 int x1, y1, ocx, ocy, di, nx, ny;
1138 unsigned int dui;
1139 Window dummy;
1140 XEvent ev;
1141
1142 ocx = nx = c->x;
1143 ocy = ny = c->y;
1144 if(XGrabPointer(dpy, monitors[selmonitor].root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1145 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1146 return;
1147 XQueryPointer(dpy, monitors[selmonitor].root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1148 for(;;) {
1149 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1150 switch (ev.type) {
1151 case ButtonRelease:
1152 XUngrabPointer(dpy, CurrentTime);
1153 return;
1154 case ConfigureRequest:
1155 case Expose:
1156 case MapRequest:
1157 handler[ev.type](&ev);
1158 break;
1159 case MotionNotify:
1160 XSync(dpy, False);
1161 nx = ocx + (ev.xmotion.x - x1);
1162 ny = ocy + (ev.xmotion.y - y1);
1163 Monitor *m = &monitors[monitorat(nx, ny)];
1164 if(abs(m->wax - nx) < SNAP)
1165 nx = m->wax;
1166 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1167 nx = m->wax + m->waw - c->w - 2 * c->border;
1168 if(abs(m->way - ny) < SNAP)
1169 ny = m->way;
1170 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1171 ny = m->way + m->wah - c->h - 2 * c->border;
1172 resize(c, nx, ny, c->w, c->h, False);
1173 memcpy(c->tags, monitors[monitorat(nx, ny)].seltags, sizeof initags);
1174 break;
1175 }
1176 }
1177 }
1178
1179 Client *
1180 nexttiled(Client *c, Monitor *m) {
1181 for(; c && (c->isfloating || !isvisible(c, m)); c = c->next);
1182 return c;
1183 }
1184
1185 void
1186 propertynotify(XEvent *e) {
1187 Client *c;
1188 Window trans;
1189 XPropertyEvent *ev = &e->xproperty;
1190
1191 if(ev->state == PropertyDelete)
1192 return; /* ignore */
1193 if((c = getclient(ev->window))) {
1194 switch (ev->atom) {
1195 default: break;
1196 case XA_WM_TRANSIENT_FOR:
1197 XGetTransientForHint(dpy, c->win, &trans);
1198 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1199 arrange();
1200 break;
1201 case XA_WM_NORMAL_HINTS:
1202 updatesizehints(c);
1203 break;
1204 }
1205 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1206 updatetitle(c);
1207 if(c == sel)
1208 drawbar();
1209 }
1210 }
1211 }
1212
1213 void
1214 quit(const char *arg) {
1215 readin = running = False;
1216 }
1217
1218 void
1219 reapply(const char *arg) {
1220 static Bool zerotags[LENGTH(tags)] = { 0 };
1221 Client *c;
1222
1223 for(c = clients; c; c = c->next) {
1224 memcpy(c->tags, zerotags, sizeof zerotags);
1225 applyrules(c);
1226 }
1227 arrange();
1228 }
1229
1230 void
1231 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1232 XWindowChanges wc;
1233 Monitor scr = monitors[monitorat(x, y)];
1234 c->monitor = monitorat(x, y);
1235
1236 if(sizehints) {
1237 /* set minimum possible */
1238 if (w < 1)
1239 w = 1;
1240 if (h < 1)
1241 h = 1;
1242
1243 /* temporarily remove base dimensions */
1244 w -= c->basew;
1245 h -= c->baseh;
1246
1247 /* adjust for aspect limits */
1248 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1249 if (w * c->maxay > h * c->maxax)
1250 w = h * c->maxax / c->maxay;
1251 else if (w * c->minay < h * c->minax)
1252 h = w * c->minay / c->minax;
1253 }
1254
1255 /* adjust for increment value */
1256 if(c->incw)
1257 w -= w % c->incw;
1258 if(c->inch)
1259 h -= h % c->inch;
1260
1261 /* restore base dimensions */
1262 w += c->basew;
1263 h += c->baseh;
1264
1265 if(c->minw > 0 && w < c->minw)
1266 w = c->minw;
1267 if(c->minh > 0 && h < c->minh)
1268 h = c->minh;
1269 if(c->maxw > 0 && w > c->maxw)
1270 w = c->maxw;
1271 if(c->maxh > 0 && h > c->maxh)
1272 h = c->maxh;
1273 }
1274 if(w <= 0 || h <= 0)
1275 return;
1276 /* TODO: offscreen appearance fixes */
1277 /*
1278 if(x > scr.sw)
1279 x = scr.sw - w - 2 * c->border;
1280 if(y > scr.sh)
1281 y = scr.sh - h - 2 * c->border;
1282 if(x + w + 2 * c->border < scr.sx)
1283 x = scr.sx;
1284 if(y + h + 2 * c->border < scr.sy)
1285 y = scr.sy;
1286 */
1287 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1288 c->x = wc.x = x;
1289 c->y = wc.y = y;
1290 c->w = wc.width = w;
1291 c->h = wc.height = h;
1292 wc.border_width = c->border;
1293 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1294 configure(c);
1295 XSync(dpy, False);
1296 }
1297 }
1298
1299 void
1300 resizemouse(Client *c) {
1301 int ocx, ocy;
1302 int nw, nh;
1303 XEvent ev;
1304
1305 ocx = c->x;
1306 ocy = c->y;
1307 if(XGrabPointer(dpy, monitors[selmonitor].root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1308 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1309 return;
1310 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1311 for(;;) {
1312 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1313 switch(ev.type) {
1314 case ButtonRelease:
1315 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1316 c->w + c->border - 1, c->h + c->border - 1);
1317 XUngrabPointer(dpy, CurrentTime);
1318 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1319 return;
1320 case ConfigureRequest:
1321 case Expose:
1322 case MapRequest:
1323 handler[ev.type](&ev);
1324 break;
1325 case MotionNotify:
1326 XSync(dpy, False);
1327 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1328 nw = 1;
1329 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1330 nh = 1;
1331 resize(c, c->x, c->y, nw, nh, True);
1332 break;
1333 }
1334 }
1335 }
1336
1337 void
1338 restack(void) {
1339 Client *c;
1340 XEvent ev;
1341 XWindowChanges wc;
1342 int s;
1343
1344 drawbar();
1345 if(!sel)
1346 return;
1347 if(sel->isfloating || (monitors[selmonitor].layout->arrange == floating))
1348 XRaiseWindow(dpy, sel->win);
1349 if(monitors[selmonitor].layout->arrange != floating) {
1350 wc.stack_mode = Below;
1351 wc.sibling = monitors[selmonitor].barwin;
1352 if(!sel->isfloating) {
1353 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1354 wc.sibling = sel->win;
1355 }
1356 for(s = 0; s < mcount; s++) {
1357 for(c = nexttiled(clients, &monitors[s]); c; c = nexttiled(c->next, &monitors[s])) {
1358 if(c == sel)
1359 continue;
1360 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1361 wc.sibling = c->win;
1362 }
1363 }
1364 }
1365 XSync(dpy, False);
1366 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1367 }
1368
1369 void
1370 run(void) {
1371 char *p;
1372 char buf[sizeof stext];
1373 fd_set rd;
1374 int r, xfd;
1375 unsigned int len, offset;
1376 XEvent ev;
1377
1378 /* main event loop, also reads status text from stdin */
1379 XSync(dpy, False);
1380 xfd = ConnectionNumber(dpy);
1381 readin = True;
1382 offset = 0;
1383 len = sizeof stext - 1;
1384 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1385 while(running) {
1386 FD_ZERO(&rd);
1387 if(readin)
1388 FD_SET(STDIN_FILENO, &rd);
1389 FD_SET(xfd, &rd);
1390 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1391 if(errno == EINTR)
1392 continue;
1393 eprint("select failed\n");
1394 }
1395 if(FD_ISSET(STDIN_FILENO, &rd)) {
1396 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1397 case -1:
1398 strncpy(stext, strerror(errno), len);
1399 readin = False;
1400 break;
1401 case 0:
1402 strncpy(stext, "EOF", 4);
1403 readin = False;
1404 break;
1405 default:
1406 for(p = buf + offset; r > 0; p++, r--, offset++)
1407 if(*p == '\n' || *p == '\0') {
1408 *p = '\0';
1409 strncpy(stext, buf, len);
1410 p += r - 1; /* p is buf + offset + r - 1 */
1411 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1412 offset = r;
1413 if(r)
1414 memmove(buf, p - r + 1, r);
1415 break;
1416 }
1417 break;
1418 }
1419 drawbar();
1420 }
1421 while(XPending(dpy)) {
1422 XNextEvent(dpy, &ev);
1423 if(handler[ev.type])
1424 (handler[ev.type])(&ev); /* call handler */
1425 }
1426 }
1427 }
1428
1429 void
1430 scan(void) {
1431 unsigned int i, j, num;
1432 Window *wins, d1, d2;
1433 XWindowAttributes wa;
1434
1435 for(i = 0; i < mcount; i++) {
1436 Monitor *m = &monitors[i];
1437 wins = NULL;
1438 if(XQueryTree(dpy, m->root, &d1, &d2, &wins, &num)) {
1439 for(j = 0; j < num; j++) {
1440 if(!XGetWindowAttributes(dpy, wins[j], &wa)
1441 || wa.override_redirect || XGetTransientForHint(dpy, wins[j], &d1))
1442 continue;
1443 if(wa.map_state == IsViewable || getstate(wins[j]) == IconicState)
1444 manage(wins[j], &wa);
1445 }
1446 for(j = 0; j < num; j++) { /* now the transients */
1447 if(!XGetWindowAttributes(dpy, wins[j], &wa))
1448 continue;
1449 if(XGetTransientForHint(dpy, wins[j], &d1)
1450 && (wa.map_state == IsViewable || getstate(wins[j]) == IconicState))
1451 manage(wins[j], &wa);
1452 }
1453 }
1454 if(wins)
1455 XFree(wins);
1456 }
1457 }
1458
1459 void
1460 setclientstate(Client *c, long state) {
1461 long data[] = {state, None};
1462
1463 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1464 PropModeReplace, (unsigned char *)data, 2);
1465 }
1466
1467 void
1468 setlayout(const char *arg) {
1469 unsigned int i;
1470 Monitor *m = &monitors[monitorat(-1, -1)];
1471
1472 if(!arg) {
1473 m->layout++;
1474 if(m->layout == &layouts[LENGTH(layouts)])
1475 m->layout = &layouts[0];
1476 }
1477 else {
1478 for(i = 0; i < LENGTH(layouts); i++)
1479 if(!strcmp(arg, layouts[i].symbol))
1480 break;
1481 if(i == LENGTH(layouts))
1482 return;
1483 m->layout = &layouts[i];
1484 }
1485 if(sel)
1486 arrange();
1487 else
1488 drawbar();
1489 }
1490
1491 void
1492 setmwfact(const char *arg) {
1493 double delta;
1494
1495 Monitor *m = &monitors[monitorat(-1, -1)];
1496
1497 if(!domwfact)
1498 return;
1499 /* arg handling, manipulate mwfact */
1500 if(arg == NULL)
1501 m->mwfact = MWFACT;
1502 else if(sscanf(arg, "%lf", &delta) == 1) {
1503 if(arg[0] == '+' || arg[0] == '-')
1504 m->mwfact += delta;
1505 else
1506 m->mwfact = delta;
1507 if(m->mwfact < 0.1)
1508 m->mwfact = 0.1;
1509 else if(m->mwfact > 0.9)
1510 m->mwfact = 0.9;
1511 }
1512 arrange();
1513 }
1514
1515 void
1516 setup(void) {
1517 unsigned int i, j, k;
1518 Monitor *m;
1519 XSetWindowAttributes wa;
1520 XineramaScreenInfo *info = NULL;
1521
1522 /* init atoms */
1523 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1524 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1525 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1526 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1527 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1528 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1529
1530 /* init cursors */
1531 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1532 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1533 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1534
1535 // init screens/monitors first
1536 if (XineramaIsActive(dpy)) {
1537 info = XineramaQueryScreens(dpy, &mcount);
1538 }
1539 mcount = 1;
1540 monitors = emallocz(mcount * sizeof(Monitor));
1541
1542 for(i = 0; i < mcount; i++) {
1543 /* init geometry */
1544 m = &monitors[i];
1545
1546 m->screen = i;
1547 m->root = RootWindow(dpy, i);
1548
1549 if (mcount != 1) { // TODO: Xinerama
1550 m->sx = info[i].x_org;
1551 m->sy = info[i].y_org;
1552 m->sw = info[i].width;
1553 m->sh = info[i].height;
1554 }
1555 else {
1556 m->sx = 0;
1557 m->sy = 0;
1558 m->sw = DisplayWidth(dpy, m->screen);
1559 m->sh = DisplayHeight(dpy, m->screen);
1560 }
1561
1562 m->seltags = emallocz(sizeof initags);
1563 m->prevtags = emallocz(sizeof initags);
1564
1565 memcpy(m->seltags, initags, sizeof initags);
1566 memcpy(m->prevtags, initags, sizeof initags);
1567
1568 /* init appearance */
1569 m->dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR, i);
1570 m->dc.norm[ColBG] = getcolor(NORMBGCOLOR, i);
1571 m->dc.norm[ColFG] = getcolor(NORMFGCOLOR, i);
1572 m->dc.sel[ColBorder] = getcolor(SELBORDERCOLOR, i);
1573 m->dc.sel[ColBG] = getcolor(SELBGCOLOR, i);
1574 m->dc.sel[ColFG] = getcolor(SELFGCOLOR, i);
1575 initfont(m, FONT);
1576 m->dc.h = bh = m->dc.font.height + 2;
1577
1578 /* init layouts */
1579 m->mwfact = MWFACT;
1580 m->layout = &layouts[0];
1581 for(blw = k = 0; k < LENGTH(layouts); k++) {
1582 j = textw(m, layouts[k].symbol);
1583 if(j > blw)
1584 blw = j;
1585 }
1586
1587 // TODO: bpos per screen?
1588 bpos = BARPOS;
1589 wa.override_redirect = 1;
1590 wa.background_pixmap = ParentRelative;
1591 wa.event_mask = ButtonPressMask | ExposureMask;
1592
1593 /* init bars */
1594 m->barwin = XCreateWindow(dpy, m->root, m->sx, m->sy, m->sw, bh, 0,
1595 DefaultDepth(dpy, m->screen), CopyFromParent, DefaultVisual(dpy, m->screen),
1596 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1597 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1598 updatebarpos(m);
1599 XMapRaised(dpy, m->barwin);
1600 strcpy(stext, "dwm-"VERSION);
1601 m->dc.drawable = XCreatePixmap(dpy, m->root, m->sw, bh, DefaultDepth(dpy, m->screen));
1602 m->dc.gc = XCreateGC(dpy, m->root, 0, 0);
1603 XSetLineAttributes(dpy, m->dc.gc, 1, LineSolid, CapButt, JoinMiter);
1604 if(!m->dc.font.set)
1605 XSetFont(dpy, m->dc.gc, m->dc.font.xfont->fid);
1606
1607 /* EWMH support per monitor */
1608 XChangeProperty(dpy, m->root, netatom[NetSupported], XA_ATOM, 32,
1609 PropModeReplace, (unsigned char *) netatom, NetLast);
1610
1611 /* select for events */
1612 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1613 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1614 XChangeWindowAttributes(dpy, m->root, CWEventMask | CWCursor, &wa);
1615 XSelectInput(dpy, m->root, wa.event_mask);
1616 }
1617
1618 /* grab keys */
1619 grabkeys();
1620
1621 /* init tags */
1622 compileregs();
1623 }
1624
1625 void
1626 spawn(const char *arg) {
1627 static char *shell = NULL;
1628
1629 if(!shell && !(shell = getenv("SHELL")))
1630 shell = "/bin/sh";
1631 if(!arg)
1632 return;
1633 /* The double-fork construct avoids zombie processes and keeps the code
1634 * clean from stupid signal handlers. */
1635 if(fork() == 0) {
1636 if(fork() == 0) {
1637 if(dpy)
1638 close(ConnectionNumber(dpy));
1639 setsid();
1640 execl(shell, shell, "-c", arg, (char *)NULL);
1641 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1642 perror(" failed");
1643 }
1644 exit(0);
1645 }
1646 wait(0);
1647 }
1648
1649 void
1650 tag(const char *arg) {
1651 unsigned int i;
1652
1653 if(!sel)
1654 return;
1655 for(i = 0; i < LENGTH(tags); i++)
1656 sel->tags[i] = (NULL == arg);
1657 sel->tags[idxoftag(arg)] = True;
1658 arrange();
1659 }
1660
1661 unsigned int
1662 textnw(Monitor *m, const char *text, unsigned int len) {
1663 XRectangle r;
1664
1665 if(m->dc.font.set) {
1666 XmbTextExtents(m->dc.font.set, text, len, NULL, &r);
1667 return r.width;
1668 }
1669 return XTextWidth(m->dc.font.xfont, text, len);
1670 }
1671
1672 unsigned int
1673 textw(Monitor *m, const char *text) {
1674 return textnw(m, text, strlen(text)) + m->dc.font.height;
1675 }
1676
1677 void
1678 tile(void) {
1679 unsigned int i, n, nx, ny, nw, nh, mw, th;
1680 int s;
1681 Client *c, *mc;
1682
1683 domwfact = dozoom = True;
1684
1685 nw = 0; /* gcc stupidity requires this */
1686
1687 for (s = 0; s < mcount; s++) {
1688 Monitor *m = &monitors[s];
1689
1690 for(n = 0, c = nexttiled(clients, m); c; c = nexttiled(c->next, m))
1691 n++;
1692
1693 for(i = 0, c = mc = nexttiled(clients, m); c; c = nexttiled(c->next, m)) {
1694 /* window geoms */
1695 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1696 th = (n > 1) ? m->wah / (n - 1) : 0;
1697 if(n > 1 && th < bh)
1698 th = m->wah;
1699 if(i == 0) { /* master */
1700 nx = m->wax;
1701 ny = m->way;
1702 nw = mw - 2 * c->border;
1703 nh = m->wah - 2 * c->border;
1704 }
1705 else { /* tile window */
1706 if(i == 1) {
1707 ny = m->way;
1708 nx += mc->w + 2 * mc->border;
1709 nw = m->waw - mw - 2 * c->border;
1710 }
1711 if(i + 1 == n) /* remainder */
1712 nh = (m->way + m->wah) - ny - 2 * c->border;
1713 else
1714 nh = th - 2 * c->border;
1715 }
1716 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1717 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1718 /* client doesn't accept size constraints */
1719 resize(c, nx, ny, nw, nh, False);
1720 if(n > 1 && th != m->wah)
1721 ny = c->y + c->h + 2 * c->border;
1722
1723 i++;
1724 }
1725 }
1726 }
1727 void
1728 togglebar(const char *arg) {
1729 if(bpos == BarOff)
1730 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1731 else
1732 bpos = BarOff;
1733 updatebarpos(&monitors[monitorat(-1,-1)]);
1734 arrange();
1735 }
1736
1737 void
1738 togglefloating(const char *arg) {
1739 if(!sel)
1740 return;
1741 sel->isfloating = !sel->isfloating;
1742 if(sel->isfloating)
1743 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1744 arrange();
1745 }
1746
1747 void
1748 toggletag(const char *arg) {
1749 unsigned int i, j;
1750
1751 if(!sel)
1752 return;
1753 i = idxoftag(arg);
1754 sel->tags[i] = !sel->tags[i];
1755 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1756 if(j == LENGTH(tags))
1757 sel->tags[i] = True; /* at least one tag must be enabled */
1758 arrange();
1759 }
1760
1761 void
1762 toggleview(const char *arg) {
1763 unsigned int i, j;
1764
1765 Monitor *m = &monitors[monitorat(-1, -1)];
1766
1767 i = idxoftag(arg);
1768 m->seltags[i] = !m->seltags[i];
1769 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1770 if(j == LENGTH(tags))
1771 m->seltags[i] = True; /* at least one tag must be viewed */
1772 arrange();
1773 }
1774
1775 void
1776 unban(Client *c) {
1777 if(!c->isbanned)
1778 return;
1779 XMoveWindow(dpy, c->win, c->x, c->y);
1780 c->isbanned = False;
1781 }
1782
1783 void
1784 unmanage(Client *c) {
1785 XWindowChanges wc;
1786
1787 wc.border_width = c->oldborder;
1788 /* The server grab construct avoids race conditions. */
1789 XGrabServer(dpy);
1790 XSetErrorHandler(xerrordummy);
1791 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1792 detach(c);
1793 detachstack(c);
1794 if(sel == c)
1795 focus(NULL);
1796 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1797 setclientstate(c, WithdrawnState);
1798 free(c->tags);
1799 free(c);
1800 XSync(dpy, False);
1801 XSetErrorHandler(xerror);
1802 XUngrabServer(dpy);
1803 arrange();
1804 }
1805
1806 void
1807 unmapnotify(XEvent *e) {
1808 Client *c;
1809 XUnmapEvent *ev = &e->xunmap;
1810
1811 if((c = getclient(ev->window)))
1812 unmanage(c);
1813 }
1814
1815 void
1816 updatebarpos(Monitor *s) {
1817 XEvent ev;
1818
1819 s->wax = s->sx;
1820 s->way = s->sy;
1821 s->wah = s->sh;
1822 s->waw = s->sw;
1823 switch(bpos) {
1824 default:
1825 s->wah -= bh;
1826 s->way += bh;
1827 XMoveWindow(dpy, s->barwin, s->sx, s->sy);
1828 break;
1829 case BarBot:
1830 s->wah -= bh;
1831 XMoveWindow(dpy, s->barwin, s->sx, s->sy + s->wah);
1832 break;
1833 case BarOff:
1834 XMoveWindow(dpy, s->barwin, s->sx, s->sy - bh);
1835 break;
1836 }
1837 XSync(dpy, False);
1838 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1839 }
1840
1841 void
1842 updatesizehints(Client *c) {
1843 long msize;
1844 XSizeHints size;
1845
1846 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1847 size.flags = PSize;
1848 c->flags = size.flags;
1849 if(c->flags & PBaseSize) {
1850 c->basew = size.base_width;
1851 c->baseh = size.base_height;
1852 }
1853 else if(c->flags & PMinSize) {
1854 c->basew = size.min_width;
1855 c->baseh = size.min_height;
1856 }
1857 else
1858 c->basew = c->baseh = 0;
1859 if(c->flags & PResizeInc) {
1860 c->incw = size.width_inc;
1861 c->inch = size.height_inc;
1862 }
1863 else
1864 c->incw = c->inch = 0;
1865 if(c->flags & PMaxSize) {
1866 c->maxw = size.max_width;
1867 c->maxh = size.max_height;
1868 }
1869 else
1870 c->maxw = c->maxh = 0;
1871 if(c->flags & PMinSize) {
1872 c->minw = size.min_width;
1873 c->minh = size.min_height;
1874 }
1875 else if(c->flags & PBaseSize) {
1876 c->minw = size.base_width;
1877 c->minh = size.base_height;
1878 }
1879 else
1880 c->minw = c->minh = 0;
1881 if(c->flags & PAspect) {
1882 c->minax = size.min_aspect.x;
1883 c->maxax = size.max_aspect.x;
1884 c->minay = size.min_aspect.y;
1885 c->maxay = size.max_aspect.y;
1886 }
1887 else
1888 c->minax = c->maxax = c->minay = c->maxay = 0;
1889 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1890 && c->maxw == c->minw && c->maxh == c->minh);
1891 }
1892
1893 void
1894 updatetitle(Client *c) {
1895 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1896 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1897 }
1898
1899 /* There's no way to check accesses to destroyed windows, thus those cases are
1900 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1901 * default error handler, which may call exit. */
1902 int
1903 xerror(Display *dpy, XErrorEvent *ee) {
1904 if(ee->error_code == BadWindow
1905 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1906 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1907 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1908 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1909 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1910 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1911 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1912 return 0;
1913 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1914 ee->request_code, ee->error_code);
1915 return xerrorxlib(dpy, ee); /* may call exit */
1916 }
1917
1918 int
1919 xerrordummy(Display *dsply, XErrorEvent *ee) {
1920 return 0;
1921 }
1922
1923 /* Startup Error handler to check if another window manager
1924 * is already running. */
1925 int
1926 xerrorstart(Display *dsply, XErrorEvent *ee) {
1927 otherwm = True;
1928 return -1;
1929 }
1930
1931 void
1932 view(const char *arg) {
1933 unsigned int i;
1934
1935 Monitor *m = &monitors[monitorat(-1, -1)];
1936
1937 memcpy(m->prevtags, m->seltags, sizeof initags);
1938 for(i = 0; i < LENGTH(tags); i++)
1939 m->seltags[i] = (NULL == arg);
1940 m->seltags[idxoftag(arg)] = True;
1941 arrange();
1942 }
1943
1944 void
1945 viewprevtag(const char *arg) {
1946 static Bool tmp[LENGTH(tags)];
1947
1948 Monitor *m = &monitors[monitorat(-1, -1)];
1949
1950 memcpy(tmp, m->seltags, sizeof initags);
1951 memcpy(m->seltags, m->prevtags, sizeof initags);
1952 memcpy(m->prevtags, tmp, sizeof initags);
1953 arrange();
1954 }
1955
1956 void
1957 zoom(const char *arg) {
1958 Client *c;
1959
1960 if(!sel || !dozoom || sel->isfloating)
1961 return;
1962 if((c = sel) == nexttiled(clients, &monitors[c->monitor]))
1963 if(!(c = nexttiled(c->next, &monitors[c->monitor])))
1964 return;
1965 detach(c);
1966 attach(c);
1967 focus(c);
1968 arrange();
1969 }
1970
1971 int
1972 monitorat(int x, int y) {
1973 int i;
1974
1975 return 0;
1976 if(!XineramaIsActive(dpy))
1977 return 0;
1978
1979 if (x < 0 || y < 0) {
1980 Window win;
1981 unsigned int mask;
1982 XQueryPointer(dpy, DefaultRootWindow(dpy), &win, &win, &x, &y, &i, &i, &mask);
1983 }
1984
1985 for(i = 0; i < mcount; i++) {
1986 Monitor *m = &monitors[i];
1987 if((x < 0 || (x >= m->sx && x < m->sx + m->sw))
1988 && (y < 0 || (y >= m->sy && y < m->sy + m->sh)))
1989 {
1990 return i;
1991 }
1992 }
1993 return 0;
1994 }
1995
1996 void
1997 movetomonitor(const char *arg) {
1998 if (sel) {
1999 sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
2000
2001 memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
2002 resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
2003 arrange();
2004 }
2005 }
2006
2007 void
2008 selectmonitor(const char *arg) {
2009 Monitor *m = &monitors[arg ? atoi(arg) : (monitorat(-1, -1)+1) % mcount];
2010
2011 XWarpPointer(dpy, None, m->root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2012 focus(NULL);
2013 }
2014
2015
2016 int
2017 main(int argc, char *argv[]) {
2018 if(argc == 2 && !strcmp("-v", argv[1]))
2019 eprint("dwm-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, "
2020 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2021 else if(argc != 1)
2022 eprint("usage: dwm [-v]\n");
2023
2024 setlocale(LC_CTYPE, "");
2025 if(!(dpy = XOpenDisplay(0)))
2026 eprint("dwm: cannot open display\n");
2027
2028 checkotherwm();
2029 setup();
2030 drawbar();
2031 scan();
2032 run();
2033 cleanup();
2034
2035 XCloseDisplay(dpy);
2036 return 0;
2037 }