259327d190734a76f1e97bfe759aa07542f26bd0
[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 id;
121 Window barwin;
122 //TODO: Window root;
123 //TODO: int screen;
124 int sx, sy, sw, sh, wax, way, wah, waw;
125 DC dc;
126 Bool *seltags;
127 Bool *prevtags;
128 Layout *layout;
129 double mwfact;
130 } Monitor;
131
132 /* function declarations */
133 void applyrules(Client *c);
134 void arrange(void);
135 void attach(Client *c);
136 void attachstack(Client *c);
137 void ban(Client *c);
138 void buttonpress(XEvent *e);
139 void checkotherwm(void);
140 void cleanup(void);
141 void compileregs(void);
142 void configure(Client *c);
143 void configurenotify(XEvent *e);
144 void configurerequest(XEvent *e);
145 void destroynotify(XEvent *e);
146 void detach(Client *c);
147 void detachstack(Client *c);
148 void drawbar(void);
149 void drawsquare(Monitor *, Bool filled, Bool empty, unsigned long col[ColLast]);
150 void drawtext(Monitor *, const char *text, unsigned long col[ColLast]);
151 void *emallocz(unsigned int size);
152 void enternotify(XEvent *e);
153 void eprint(const char *errstr, ...);
154 void expose(XEvent *e);
155 void floating(void); /* default floating layout */
156 void focus(Client *c);
157 void focusin(XEvent *e);
158 void focusnext(const char *arg);
159 void focusprev(const char *arg);
160 Client *getclient(Window w);
161 unsigned long getcolor(const char *colstr);
162 long getstate(Window w);
163 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
164 void grabbuttons(Client *c, Bool focused);
165 void grabkeys(void);
166 unsigned int idxoftag(const char *tag);
167 void initfont(Monitor*, const char *fontstr);
168 Bool isoccupied(Monitor *m, unsigned int t);
169 Bool isprotodel(Client *c);
170 Bool isvisible(Client *c, Monitor *m);
171 void keypress(XEvent *e);
172 void killclient(const char *arg);
173 void leavenotify(XEvent *e);
174 void manage(Window w, XWindowAttributes *wa);
175 void mappingnotify(XEvent *e);
176 void maprequest(XEvent *e);
177 void movemouse(Client *c);
178 Client *nexttiled(Client *c, Monitor *m);
179 void propertynotify(XEvent *e);
180 void quit(const char *arg);
181 void reapply(const char *arg);
182 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
183 void resizemouse(Client *c);
184 void restack(void);
185 void run(void);
186 void scan(void);
187 void setclientstate(Client *c, long state);
188 void setlayout(const char *arg);
189 void setmwfact(const char *arg);
190 void setup(void);
191 void spawn(const char *arg);
192 void tag(const char *arg);
193 unsigned int textnw(Monitor*, const char *text, unsigned int len);
194 unsigned int textw(Monitor*, const char *text);
195 void tile(void);
196 void togglebar(const char *arg);
197 void togglefloating(const char *arg);
198 void toggletag(const char *arg);
199 void toggleview(const char *arg);
200 void unban(Client *c);
201 void unmanage(Client *c);
202 void unmapnotify(XEvent *e);
203 void updatebarpos(Monitor *s);
204 void updatesizehints(Client *c);
205 void updatetitle(Client *c);
206 void view(const char *arg);
207 void viewprevtag(const char *arg); /* views previous selected tags */
208 int xerror(Display *dpy, XErrorEvent *ee);
209 int xerrordummy(Display *dsply, XErrorEvent *ee);
210 int xerrorstart(Display *dsply, XErrorEvent *ee);
211 void zoom(const char *arg);
212 int monitorat(int, int);
213 void movetomonitor(const char *arg);
214 void selectmonitor(const char *arg);
215
216 /* variables */
217 char stext[256];
218 int mcount, screen;
219 //double mwfact;
220 //int screen, sx, sy, sw, sh, wax, way, waw, wah;
221 int (*xerrorxlib)(Display *, XErrorEvent *);
222 unsigned int bh, bpos;
223 unsigned int blw = 0;
224 unsigned int numlockmask = 0;
225 void (*handler[LASTEvent]) (XEvent *) = {
226 [ButtonPress] = buttonpress,
227 [ConfigureRequest] = configurerequest,
228 [ConfigureNotify] = configurenotify,
229 [DestroyNotify] = destroynotify,
230 [EnterNotify] = enternotify,
231 [Expose] = expose,
232 [FocusIn] = focusin,
233 [KeyPress] = keypress,
234 [LeaveNotify] = leavenotify,
235 [MappingNotify] = mappingnotify,
236 [MapRequest] = maprequest,
237 [PropertyNotify] = propertynotify,
238 [UnmapNotify] = unmapnotify
239 };
240 Atom wmatom[WMLast], netatom[NetLast];
241 Bool domwfact = True;
242 Bool dozoom = True;
243 Bool otherwm, readin;
244 Bool running = True;
245 //Bool selscreen = True;
246 Client *clients = NULL;
247 Client *sel = NULL;
248 Client *stack = NULL;
249 Cursor cursor[CurLast];
250 Display *dpy;
251 DC dc = {0};
252 Window root;
253 //Layout *layout = NULL;
254 //Window barwin, root;
255 Regs *regs = NULL;
256 Monitor *monitors;
257 int selmonitor = 0;
258
259 /* configuration, allows nested code to access above variables */
260 #include "config.h"
261
262 //Bool prevtags[LENGTH(tags)];
263
264 /* function implementations */
265 void
266 applyrules(Client *c) {
267 static char buf[512];
268 unsigned int i, j;
269 regmatch_t tmp;
270 Bool matched_tag = False;
271 Bool matched_monitor = False;
272 XClassHint ch = { 0 };
273
274 /* rule matching */
275 XGetClassHint(dpy, c->win, &ch);
276 snprintf(buf, sizeof buf, "%s:%s:%s",
277 ch.res_class ? ch.res_class : "",
278 ch.res_name ? ch.res_name : "", c->name);
279 for(i = 0; i < LENGTH(rules); i++)
280 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
281 if (rules[i].monitor >= 0 && rules[i].monitor < mcount) {
282 matched_monitor = True;
283 c->monitor = rules[i].monitor;
284 }
285
286 c->isfloating = rules[i].isfloating;
287 for(j = 0; regs[i].tagregex && j < LENGTH(tags); j++) {
288 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
289 matched_tag = True;
290 c->tags[j] = True;
291 }
292 }
293 }
294 if(ch.res_class)
295 XFree(ch.res_class);
296 if(ch.res_name)
297 XFree(ch.res_name);
298 if(!matched_tag)
299 memcpy(c->tags, monitors[monitorat(-1, -1)].seltags, sizeof initags);
300 if (!matched_monitor)
301 c->monitor = monitorat(-1, -1);
302 }
303
304 void
305 arrange(void) {
306 Client *c;
307
308 for(c = clients; c; c = c->next)
309 if(isvisible(c, &monitors[c->monitor]))
310 unban(c);
311 else
312 ban(c);
313
314 monitors[selmonitor].layout->arrange();
315 focus(NULL);
316 restack();
317 }
318
319 void
320 attach(Client *c) {
321 if(clients)
322 clients->prev = c;
323 c->next = clients;
324 clients = c;
325 }
326
327 void
328 attachstack(Client *c) {
329 c->snext = stack;
330 stack = c;
331 }
332
333 void
334 ban(Client *c) {
335 if(c->isbanned)
336 return;
337 XMoveWindow(dpy, c->win, c->x + 3 * monitors[c->monitor].sw, c->y);
338 c->isbanned = True;
339 }
340
341 void
342 buttonpress(XEvent *e) {
343 unsigned int i, x;
344 Client *c;
345 XButtonPressedEvent *ev = &e->xbutton;
346
347 Monitor s = monitors[monitorat(-1, -1)];
348
349 if(ev->window == s.barwin) {
350 x = 0;
351 for(i = 0; i < LENGTH(tags); i++) {
352 x += textw(&s, tags[i]);
353 if(ev->x < x) {
354 if(ev->button == Button1) {
355 if(ev->state & MODKEY)
356 tag(tags[i]);
357 else
358 view(tags[i]);
359 }
360 else if(ev->button == Button3) {
361 if(ev->state & MODKEY)
362 toggletag(tags[i]);
363 else
364 toggleview(tags[i]);
365 }
366 return;
367 }
368 }
369 if((ev->x < x + blw) && ev->button == Button1)
370 setlayout(NULL);
371 }
372 else if((c = getclient(ev->window))) {
373 focus(c);
374 if(CLEANMASK(ev->state) != MODKEY)
375 return;
376 if(ev->button == Button1) {
377 if((s.layout->arrange == floating) || c->isfloating)
378 restack();
379 else
380 togglefloating(NULL);
381 movemouse(c);
382 }
383 else if(ev->button == Button2) {
384 if((floating != s.layout->arrange) && c->isfloating)
385 togglefloating(NULL);
386 else
387 zoom(NULL);
388 }
389 else if(ev->button == Button3 && !c->isfixed) {
390 if((floating == s.layout->arrange) || c->isfloating)
391 restack();
392 else
393 togglefloating(NULL);
394 resizemouse(c);
395 }
396 }
397 }
398
399 void
400 checkotherwm(void) {
401 otherwm = False;
402 XSetErrorHandler(xerrorstart);
403
404 /* this causes an error if some other window manager is running */
405 XSelectInput(dpy, root, SubstructureRedirectMask);
406 XSync(dpy, False);
407 if(otherwm)
408 eprint("dwm: another window manager is already running\n");
409 XSync(dpy, False);
410 XSetErrorHandler(NULL);
411 xerrorxlib = XSetErrorHandler(xerror);
412 XSync(dpy, False);
413 }
414
415 void
416 cleanup(void) {
417 unsigned int i;
418 close(STDIN_FILENO);
419 while(stack) {
420 unban(stack);
421 unmanage(stack);
422 }
423 for(i = 0; i < mcount; i++) {
424 Monitor *m = &monitors[i];
425 if(m->dc.font.set)
426 XFreeFontSet(dpy, m->dc.font.set);
427 else
428 XFreeFont(dpy, m->dc.font.xfont);
429 XUngrabKey(dpy, AnyKey, AnyModifier, root);
430 XFreePixmap(dpy, m->dc.drawable);
431 XFreeGC(dpy, m->dc.gc);
432 XDestroyWindow(dpy, m->barwin);
433 XFreeCursor(dpy, cursor[CurNormal]);
434 XFreeCursor(dpy, cursor[CurResize]);
435 XFreeCursor(dpy, cursor[CurMove]);
436 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
437 XSync(dpy, False);
438 }
439 }
440
441 void
442 compileregs(void) {
443 unsigned int i;
444 regex_t *reg;
445
446 if(regs)
447 return;
448 regs = emallocz(LENGTH(rules) * sizeof(Regs));
449 for(i = 0; i < LENGTH(rules); i++) {
450 if(rules[i].prop) {
451 reg = emallocz(sizeof(regex_t));
452 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
453 free(reg);
454 else
455 regs[i].propregex = reg;
456 }
457 if(rules[i].tags) {
458 reg = emallocz(sizeof(regex_t));
459 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
460 free(reg);
461 else
462 regs[i].tagregex = reg;
463 }
464 }
465 }
466
467 void
468 configure(Client *c) {
469 XConfigureEvent ce;
470
471 ce.type = ConfigureNotify;
472 ce.display = dpy;
473 ce.event = c->win;
474 ce.window = c->win;
475 ce.x = c->x;
476 ce.y = c->y;
477 ce.width = c->w;
478 ce.height = c->h;
479 ce.border_width = c->border;
480 ce.above = None;
481 ce.override_redirect = False;
482 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
483 }
484
485 void
486 configurenotify(XEvent *e) {
487 XConfigureEvent *ev = &e->xconfigure;
488 Monitor *m = &monitors[selmonitor];
489
490 if(ev->window == root && (ev->width != m->sw || ev->height != m->sh)) {
491 m->sw = ev->width;
492 m->sh = ev->height;
493 XFreePixmap(dpy, dc.drawable);
494 dc.drawable = XCreatePixmap(dpy, root, m->sw, bh, DefaultDepth(dpy, screen));
495 XResizeWindow(dpy, m->barwin, m->sw, bh);
496 updatebarpos(m);
497 arrange();
498 }
499 }
500
501 void
502 configurerequest(XEvent *e) {
503 Client *c;
504 XConfigureRequestEvent *ev = &e->xconfigurerequest;
505 XWindowChanges wc;
506
507 if((c = getclient(ev->window))) {
508 Monitor *m = &monitors[c->monitor];
509 if(ev->value_mask & CWBorderWidth)
510 c->border = ev->border_width;
511 if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
512 if(ev->value_mask & CWX)
513 c->x = m->sx+ev->x;
514 if(ev->value_mask & CWY)
515 c->y = m->sy+ev->y;
516 if(ev->value_mask & CWWidth)
517 c->w = ev->width;
518 if(ev->value_mask & CWHeight)
519 c->h = ev->height;
520 if((c->x - m->sx + c->w) > m->sw && c->isfloating)
521 c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
522 if((c->y - m->sy + c->h) > m->sh && c->isfloating)
523 c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
524 if((ev->value_mask & (CWX | CWY))
525 && !(ev->value_mask & (CWWidth | CWHeight)))
526 configure(c);
527 if(isvisible(c, &monitors[monitorat(-1,-1)]))
528 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
529 }
530 else
531 configure(c);
532 }
533 else {
534 wc.x = ev->x;
535 wc.y = ev->y;
536 wc.width = ev->width;
537 wc.height = ev->height;
538 wc.border_width = ev->border_width;
539 wc.sibling = ev->above;
540 wc.stack_mode = ev->detail;
541 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
542 }
543 XSync(dpy, False);
544 }
545
546 void
547 destroynotify(XEvent *e) {
548 Client *c;
549 XDestroyWindowEvent *ev = &e->xdestroywindow;
550
551 if((c = getclient(ev->window)))
552 unmanage(c);
553 }
554
555 void
556 detach(Client *c) {
557 if(c->prev)
558 c->prev->next = c->next;
559 if(c->next)
560 c->next->prev = c->prev;
561 if(c == clients)
562 clients = c->next;
563 c->next = c->prev = NULL;
564 }
565
566 void
567 detachstack(Client *c) {
568 Client **tc;
569
570 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
571 *tc = c->snext;
572 }
573
574 void
575 drawbar(void) {
576 int i, x, s;
577
578 for(s = 0; s < mcount; ++s) {
579 Monitor *m = &monitors[s];
580 m->dc.x = 0;
581 for(i = 0; i < LENGTH(tags); i++) {
582 m->dc.w = textw(m, tags[i]);
583 if(m->seltags[i]) {
584 drawtext(m, tags[i], m->dc.sel);
585 drawsquare(m, sel && sel->tags[i] && sel->monitor == m->id, isoccupied(m, i), m->dc.sel);
586 }
587 else {
588 drawtext(m, tags[i], m->dc.norm);
589 drawsquare(m, sel && sel->tags[i] && sel->monitor == m->id, isoccupied(m, i), m->dc.norm);
590 }
591 m->dc.x += m->dc.w;
592 }
593 m->dc.w = blw;
594 drawtext(m, m->layout->symbol, m->dc.norm);
595 x = m->dc.x + m->dc.w;
596 m->dc.w = textw(m, stext);
597 m->dc.x = m->sw - m->dc.w;
598 if(m->dc.x < x) {
599 m->dc.x = x;
600 m->dc.w = m->sw - x;
601 }
602 drawtext(m, stext, m->dc.norm);
603 if((m->dc.w = m->dc.x - x) > bh) {
604 m->dc.x = x;
605 if(sel && sel->monitor == m->id) {
606 drawtext(m, sel->name, m->dc.sel);
607 drawsquare(m, False, sel->isfloating, m->dc.sel);
608 }
609 else
610 drawtext(m, NULL, m->dc.norm);
611 }
612 XCopyArea(dpy, m->dc.drawable, m->barwin, m->dc.gc, 0, 0, m->sw, bh, 0, 0);
613 XSync(dpy, False);
614 }
615 }
616
617 void
618 drawsquare(Monitor *m, Bool filled, Bool empty, unsigned long col[ColLast]) {
619 int x;
620 XGCValues gcv;
621 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
622
623 gcv.foreground = col[ColFG];
624 XChangeGC(dpy, m->dc.gc, GCForeground, &gcv);
625 x = (m->dc.font.ascent + m->dc.font.descent + 2) / 4;
626 r.x = m->dc.x + 1;
627 r.y = m->dc.y + 1;
628 if(filled) {
629 r.width = r.height = x + 1;
630 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
631 }
632 else if(empty) {
633 r.width = r.height = x;
634 XDrawRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
635 }
636 }
637
638 void
639 drawtext(Monitor *m, const char *text, unsigned long col[ColLast]) {
640 int x, y, w, h;
641 static char buf[256];
642 unsigned int len, olen;
643 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
644
645 XSetForeground(dpy, m->dc.gc, col[ColBG]);
646 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
647 if(!text)
648 return;
649 w = 0;
650 olen = len = strlen(text);
651 if(len >= sizeof buf)
652 len = sizeof buf - 1;
653 memcpy(buf, text, len);
654 buf[len] = 0;
655 h = m->dc.font.ascent + m->dc.font.descent;
656 y = m->dc.y + (m->dc.h / 2) - (h / 2) + m->dc.font.ascent;
657 x = m->dc.x + (h / 2);
658 /* shorten text if necessary */
659 while(len && (w = textnw(m, buf, len)) > m->dc.w - h)
660 buf[--len] = 0;
661 if(len < olen) {
662 if(len > 1)
663 buf[len - 1] = '.';
664 if(len > 2)
665 buf[len - 2] = '.';
666 if(len > 3)
667 buf[len - 3] = '.';
668 }
669 if(w > m->dc.w)
670 return; /* too long */
671 XSetForeground(dpy, m->dc.gc, col[ColFG]);
672 if(m->dc.font.set)
673 XmbDrawString(dpy, m->dc.drawable, m->dc.font.set, m->dc.gc, x, y, buf, len);
674 else
675 XDrawString(dpy, m->dc.drawable, m->dc.gc, x, y, buf, len);
676 }
677
678 void *
679 emallocz(unsigned int size) {
680 void *res = calloc(1, size);
681
682 if(!res)
683 eprint("fatal: could not malloc() %u bytes\n", size);
684 return res;
685 }
686
687 void
688 enternotify(XEvent *e) {
689 Client *c;
690 XCrossingEvent *ev = &e->xcrossing;
691
692 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
693 return;
694 if((c = getclient(ev->window)))
695 focus(c);
696 else if(ev->window == root) {
697 selmonitor = True;
698 focus(NULL);
699 }
700 }
701
702 void
703 eprint(const char *errstr, ...) {
704 va_list ap;
705
706 va_start(ap, errstr);
707 vfprintf(stderr, errstr, ap);
708 va_end(ap);
709 exit(EXIT_FAILURE);
710 }
711
712 void
713 expose(XEvent *e) {
714 XExposeEvent *ev = &e->xexpose;
715
716 if(ev->count == 0) {
717 if(ev->window == monitors[selmonitor].barwin)
718 drawbar();
719 }
720 }
721
722 void
723 floating(void) { /* default floating layout */
724 Client *c;
725
726 domwfact = dozoom = False;
727 for(c = clients; c; c = c->next)
728 if(isvisible(c, &monitors[selmonitor]))
729 resize(c, c->x, c->y, c->w, c->h, True);
730 }
731
732 void
733 focus(Client *c) {
734 Monitor *m = &monitors[monitorat(-1, -1)];
735 if(!c || (c && !isvisible(c, m)))
736 for(c = stack; c && !isvisible(c, m); c = c->snext);
737 if(sel && sel != c) {
738 grabbuttons(sel, False);
739 XSetWindowBorder(dpy, sel->win, monitors[sel->monitor].dc.norm[ColBorder]);
740 }
741 if(c) {
742 detachstack(c);
743 attachstack(c);
744 grabbuttons(c, True);
745 }
746 sel = c;
747 drawbar();
748 if(c) {
749 XSetWindowBorder(dpy, c->win, monitors[c->monitor].dc.sel[ColBorder]);
750 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
751 selmonitor = monitorat(c->x, c->y);
752 }
753 else {
754 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
755 selmonitor = monitorat(-1, -1);
756 }
757 }
758
759 void
760 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
761 XFocusChangeEvent *ev = &e->xfocus;
762
763 if(sel && ev->window != sel->win)
764 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
765 }
766
767 void
768 focusnext(const char *arg) {
769 Client *c;
770 Monitor *m = &monitors[selmonitor];
771
772 if(!sel)
773 return;
774 for(c = sel->next; c && !isvisible(c, m); c = c->next);
775 if(!c)
776 for(c = clients; c && !isvisible(c, m); c = c->next);
777 if(c) {
778 focus(c);
779 restack();
780 }
781 }
782
783 void
784 focusprev(const char *arg) {
785 Client *c;
786 Monitor *m = &monitors[selmonitor];
787
788 if(!sel)
789 return;
790 for(c = sel->prev; c && !isvisible(c, m); c = c->prev);
791 if(!c) {
792 for(c = clients; c && c->next; c = c->next);
793 for(; c && !isvisible(c, m); c = c->prev);
794 }
795 if(c) {
796 focus(c);
797 restack();
798 }
799 }
800
801 Client *
802 getclient(Window w) {
803 Client *c;
804
805 for(c = clients; c && c->win != w; c = c->next);
806 return c;
807 }
808
809 unsigned long
810 getcolor(const char *colstr) {
811 Colormap cmap = DefaultColormap(dpy, screen);
812 XColor color;
813
814 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
815 eprint("error, cannot allocate color '%s'\n", colstr);
816 return color.pixel;
817 }
818
819 long
820 getstate(Window w) {
821 int format, status;
822 long result = -1;
823 unsigned char *p = NULL;
824 unsigned long n, extra;
825 Atom real;
826
827 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
828 &real, &format, &n, &extra, (unsigned char **)&p);
829 if(status != Success)
830 return -1;
831 if(n != 0)
832 result = *p;
833 XFree(p);
834 return result;
835 }
836
837 Bool
838 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
839 char **list = NULL;
840 int n;
841 XTextProperty name;
842
843 if(!text || size == 0)
844 return False;
845 text[0] = '\0';
846 XGetTextProperty(dpy, w, &name, atom);
847 if(!name.nitems)
848 return False;
849 if(name.encoding == XA_STRING)
850 strncpy(text, (char *)name.value, size - 1);
851 else {
852 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
853 && n > 0 && *list) {
854 strncpy(text, *list, size - 1);
855 XFreeStringList(list);
856 }
857 }
858 text[size - 1] = '\0';
859 XFree(name.value);
860 return True;
861 }
862
863 void
864 grabbuttons(Client *c, Bool focused) {
865 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
866
867 if(focused) {
868 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
869 GrabModeAsync, GrabModeSync, None, None);
870 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
871 GrabModeAsync, GrabModeSync, None, None);
872 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
873 GrabModeAsync, GrabModeSync, None, None);
874 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
875 GrabModeAsync, GrabModeSync, None, None);
876
877 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
878 GrabModeAsync, GrabModeSync, None, None);
879 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
880 GrabModeAsync, GrabModeSync, None, None);
881 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
882 GrabModeAsync, GrabModeSync, None, None);
883 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
884 GrabModeAsync, GrabModeSync, None, None);
885
886 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
887 GrabModeAsync, GrabModeSync, None, None);
888 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
889 GrabModeAsync, GrabModeSync, None, None);
890 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
891 GrabModeAsync, GrabModeSync, None, None);
892 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
893 GrabModeAsync, GrabModeSync, None, None);
894 }
895 else
896 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
897 GrabModeAsync, GrabModeSync, None, None);
898 }
899
900 void
901 grabkeys(void) {
902 unsigned int i;
903 KeyCode code;
904
905 XUngrabKey(dpy, AnyKey, AnyModifier, root);
906 for(i = 0; i < LENGTH(keys); i++) {
907 code = XKeysymToKeycode(dpy, keys[i].keysym);
908 XGrabKey(dpy, code, keys[i].mod, root, True,
909 GrabModeAsync, GrabModeAsync);
910 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
911 GrabModeAsync, GrabModeAsync);
912 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
913 GrabModeAsync, GrabModeAsync);
914 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
915 GrabModeAsync, GrabModeAsync);
916 }
917 }
918
919 unsigned int
920 idxoftag(const char *tag) {
921 unsigned int i;
922
923 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
924 return (i < LENGTH(tags)) ? i : 0;
925 }
926
927 void
928 initfont(Monitor *m, const char *fontstr) {
929 char *def, **missing;
930 int i, n;
931
932 missing = NULL;
933 if(m->dc.font.set)
934 XFreeFontSet(dpy, m->dc.font.set);
935 m->dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
936 if(missing) {
937 while(n--)
938 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
939 XFreeStringList(missing);
940 }
941 if(m->dc.font.set) {
942 XFontSetExtents *font_extents;
943 XFontStruct **xfonts;
944 char **font_names;
945 m->dc.font.ascent = m->dc.font.descent = 0;
946 font_extents = XExtentsOfFontSet(m->dc.font.set);
947 n = XFontsOfFontSet(m->dc.font.set, &xfonts, &font_names);
948 for(i = 0, m->dc.font.ascent = 0, m->dc.font.descent = 0; i < n; i++) {
949 if(m->dc.font.ascent < (*xfonts)->ascent)
950 m->dc.font.ascent = (*xfonts)->ascent;
951 if(m->dc.font.descent < (*xfonts)->descent)
952 m->dc.font.descent = (*xfonts)->descent;
953 xfonts++;
954 }
955 }
956 else {
957 if(m->dc.font.xfont)
958 XFreeFont(dpy, m->dc.font.xfont);
959 m->dc.font.xfont = NULL;
960 if(!(m->dc.font.xfont = XLoadQueryFont(dpy, fontstr))
961 && !(m->dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
962 eprint("error, cannot load font: '%s'\n", fontstr);
963 m->dc.font.ascent = m->dc.font.xfont->ascent;
964 m->dc.font.descent = m->dc.font.xfont->descent;
965 }
966 m->dc.font.height = m->dc.font.ascent + m->dc.font.descent;
967 }
968
969 Bool
970 isoccupied(Monitor *m, unsigned int t) {
971 Client *c;
972
973 for(c = clients; c; c = c->next)
974 if(c->tags[t] && c->monitor == m->id)
975 return True;
976 return False;
977 }
978
979 Bool
980 isprotodel(Client *c) {
981 int i, n;
982 Atom *protocols;
983 Bool ret = False;
984
985 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
986 for(i = 0; !ret && i < n; i++)
987 if(protocols[i] == wmatom[WMDelete])
988 ret = True;
989 XFree(protocols);
990 }
991 return ret;
992 }
993
994 Bool
995 isvisible(Client *c, Monitor *m) {
996 unsigned int i;
997
998 for(i = 0; i < LENGTH(tags); i++)
999 if(c->tags[i] && monitors[c->monitor].seltags[i] && m->id == c->monitor)
1000 return True;
1001 return False;
1002 }
1003
1004 void
1005 keypress(XEvent *e) {
1006 unsigned int i;
1007 KeySym keysym;
1008 XKeyEvent *ev;
1009
1010 ev = &e->xkey;
1011 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1012 for(i = 0; i < LENGTH(keys); i++)
1013 if(keysym == keys[i].keysym
1014 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1015 {
1016 if(keys[i].func)
1017 keys[i].func(keys[i].arg);
1018 }
1019 }
1020
1021 void
1022 killclient(const char *arg) {
1023 XEvent ev;
1024
1025 if(!sel)
1026 return;
1027 if(isprotodel(sel)) {
1028 ev.type = ClientMessage;
1029 ev.xclient.window = sel->win;
1030 ev.xclient.message_type = wmatom[WMProtocols];
1031 ev.xclient.format = 32;
1032 ev.xclient.data.l[0] = wmatom[WMDelete];
1033 ev.xclient.data.l[1] = CurrentTime;
1034 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1035 }
1036 else
1037 XKillClient(dpy, sel->win);
1038 }
1039
1040 void
1041 leavenotify(XEvent *e) {
1042 XCrossingEvent *ev = &e->xcrossing;
1043
1044 if((ev->window == root) && !ev->same_screen) {
1045 selmonitor = False;
1046 focus(NULL);
1047 }
1048 }
1049
1050 void
1051 manage(Window w, XWindowAttributes *wa) {
1052 Client *c, *t = NULL;
1053 Window trans;
1054 Status rettrans;
1055 XWindowChanges wc;
1056
1057 c = emallocz(sizeof(Client));
1058 c->tags = emallocz(sizeof initags);
1059 c->win = w;
1060
1061 applyrules(c);
1062 Monitor *m = &monitors[c->monitor];
1063
1064 c->x = wa->x+m->sx;
1065 c->y = wa->y+m->sy;
1066 c->w = wa->width;
1067 c->h = wa->height;
1068 c->oldborder = wa->border_width;
1069
1070 if (monitorat(c->x, c->y) != c->monitor) {
1071 c->x = m->sx;
1072 c->y = m->sy;
1073 }
1074
1075 if(c->w == m->sw && c->h == m->sh) {
1076 c->x = m->sx;
1077 c->y = m->sy;
1078 c->border = wa->border_width;
1079 }
1080 else {
1081 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1082 c->x = m->wax + m->waw - c->w - 2 * c->border;
1083 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1084 c->y = m->way + m->wah - c->h - 2 * c->border;
1085 if(c->x < m->wax)
1086 c->x = m->wax;
1087 if(c->y < m->way)
1088 c->y = m->way;
1089 c->border = BORDERPX;
1090 }
1091 wc.border_width = c->border;
1092 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1093 XSetWindowBorder(dpy, w, m->dc.norm[ColBorder]);
1094 configure(c); /* propagates border_width, if size doesn't change */
1095 updatesizehints(c);
1096 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1097 grabbuttons(c, False);
1098 updatetitle(c);
1099 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1100 for(t = clients; t && t->win != trans; t = t->next);
1101 if(t)
1102 memcpy(c->tags, t->tags, sizeof initags);
1103 if(!c->isfloating)
1104 c->isfloating = (rettrans == Success) || c->isfixed;
1105 attach(c);
1106 attachstack(c);
1107 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1108 ban(c);
1109 XMapWindow(dpy, c->win);
1110 setclientstate(c, NormalState);
1111 arrange();
1112 }
1113
1114 void
1115 mappingnotify(XEvent *e) {
1116 XMappingEvent *ev = &e->xmapping;
1117
1118 XRefreshKeyboardMapping(ev);
1119 if(ev->request == MappingKeyboard)
1120 grabkeys();
1121 }
1122
1123 void
1124 maprequest(XEvent *e) {
1125 static XWindowAttributes wa;
1126 XMapRequestEvent *ev = &e->xmaprequest;
1127
1128 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1129 return;
1130 if(wa.override_redirect)
1131 return;
1132 if(!getclient(ev->window))
1133 manage(ev->window, &wa);
1134 }
1135
1136 void
1137 movemouse(Client *c) {
1138 int x1, y1, ocx, ocy, di, nx, ny;
1139 unsigned int dui;
1140 Window dummy;
1141 XEvent ev;
1142
1143 ocx = nx = c->x;
1144 ocy = ny = c->y;
1145 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1146 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1147 return;
1148 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1149 for(;;) {
1150 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1151 switch (ev.type) {
1152 case ButtonRelease:
1153 XUngrabPointer(dpy, CurrentTime);
1154 return;
1155 case ConfigureRequest:
1156 case Expose:
1157 case MapRequest:
1158 handler[ev.type](&ev);
1159 break;
1160 case MotionNotify:
1161 XSync(dpy, False);
1162 nx = ocx + (ev.xmotion.x - x1);
1163 ny = ocy + (ev.xmotion.y - y1);
1164 Monitor *m = &monitors[monitorat(nx, ny)];
1165 if(abs(m->wax - nx) < SNAP)
1166 nx = m->wax;
1167 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1168 nx = m->wax + m->waw - c->w - 2 * c->border;
1169 if(abs(m->way - ny) < SNAP)
1170 ny = m->way;
1171 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1172 ny = m->way + m->wah - c->h - 2 * c->border;
1173 resize(c, nx, ny, c->w, c->h, False);
1174 memcpy(c->tags, monitors[monitorat(nx, ny)].seltags, sizeof initags);
1175 break;
1176 }
1177 }
1178 }
1179
1180 Client *
1181 nexttiled(Client *c, Monitor *m) {
1182 for(; c && (c->isfloating || !isvisible(c, m)); c = c->next);
1183 return c;
1184 }
1185
1186 void
1187 propertynotify(XEvent *e) {
1188 Client *c;
1189 Window trans;
1190 XPropertyEvent *ev = &e->xproperty;
1191
1192 if(ev->state == PropertyDelete)
1193 return; /* ignore */
1194 if((c = getclient(ev->window))) {
1195 switch (ev->atom) {
1196 default: break;
1197 case XA_WM_TRANSIENT_FOR:
1198 XGetTransientForHint(dpy, c->win, &trans);
1199 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1200 arrange();
1201 break;
1202 case XA_WM_NORMAL_HINTS:
1203 updatesizehints(c);
1204 break;
1205 }
1206 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1207 updatetitle(c);
1208 if(c == sel)
1209 drawbar();
1210 }
1211 }
1212 }
1213
1214 void
1215 quit(const char *arg) {
1216 readin = running = False;
1217 }
1218
1219 void
1220 reapply(const char *arg) {
1221 static Bool zerotags[LENGTH(tags)] = { 0 };
1222 Client *c;
1223
1224 for(c = clients; c; c = c->next) {
1225 memcpy(c->tags, zerotags, sizeof zerotags);
1226 applyrules(c);
1227 }
1228 arrange();
1229 }
1230
1231 void
1232 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1233 XWindowChanges wc;
1234 Monitor scr = monitors[monitorat(x, y)];
1235 c->monitor = scr.id;
1236
1237 if(sizehints) {
1238 /* set minimum possible */
1239 if (w < 1)
1240 w = 1;
1241 if (h < 1)
1242 h = 1;
1243
1244 /* temporarily remove base dimensions */
1245 w -= c->basew;
1246 h -= c->baseh;
1247
1248 /* adjust for aspect limits */
1249 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1250 if (w * c->maxay > h * c->maxax)
1251 w = h * c->maxax / c->maxay;
1252 else if (w * c->minay < h * c->minax)
1253 h = w * c->minay / c->minax;
1254 }
1255
1256 /* adjust for increment value */
1257 if(c->incw)
1258 w -= w % c->incw;
1259 if(c->inch)
1260 h -= h % c->inch;
1261
1262 /* restore base dimensions */
1263 w += c->basew;
1264 h += c->baseh;
1265
1266 if(c->minw > 0 && w < c->minw)
1267 w = c->minw;
1268 if(c->minh > 0 && h < c->minh)
1269 h = c->minh;
1270 if(c->maxw > 0 && w > c->maxw)
1271 w = c->maxw;
1272 if(c->maxh > 0 && h > c->maxh)
1273 h = c->maxh;
1274 }
1275 if(w <= 0 || h <= 0)
1276 return;
1277 /* TODO: offscreen appearance fixes */
1278 /*
1279 if(x > scr.sw)
1280 x = scr.sw - w - 2 * c->border;
1281 if(y > scr.sh)
1282 y = scr.sh - h - 2 * c->border;
1283 if(x + w + 2 * c->border < scr.sx)
1284 x = scr.sx;
1285 if(y + h + 2 * c->border < scr.sy)
1286 y = scr.sy;
1287 */
1288 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1289 c->x = wc.x = x;
1290 c->y = wc.y = y;
1291 c->w = wc.width = w;
1292 c->h = wc.height = h;
1293 wc.border_width = c->border;
1294 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1295 configure(c);
1296 XSync(dpy, False);
1297 }
1298 }
1299
1300 void
1301 resizemouse(Client *c) {
1302 int ocx, ocy;
1303 int nw, nh;
1304 XEvent ev;
1305
1306 ocx = c->x;
1307 ocy = c->y;
1308 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1309 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1310 return;
1311 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1312 for(;;) {
1313 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1314 switch(ev.type) {
1315 case ButtonRelease:
1316 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1317 c->w + c->border - 1, c->h + c->border - 1);
1318 XUngrabPointer(dpy, CurrentTime);
1319 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1320 return;
1321 case ConfigureRequest:
1322 case Expose:
1323 case MapRequest:
1324 handler[ev.type](&ev);
1325 break;
1326 case MotionNotify:
1327 XSync(dpy, False);
1328 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1329 nw = 1;
1330 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1331 nh = 1;
1332 resize(c, c->x, c->y, nw, nh, True);
1333 break;
1334 }
1335 }
1336 }
1337
1338 void
1339 restack(void) {
1340 Client *c;
1341 XEvent ev;
1342 XWindowChanges wc;
1343 int s;
1344
1345 drawbar();
1346 if(!sel)
1347 return;
1348 if(sel->isfloating || (monitors[selmonitor].layout->arrange == floating))
1349 XRaiseWindow(dpy, sel->win);
1350 if(monitors[selmonitor].layout->arrange != floating) {
1351 wc.stack_mode = Below;
1352 wc.sibling = monitors[selmonitor].barwin;
1353 if(!sel->isfloating) {
1354 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1355 wc.sibling = sel->win;
1356 }
1357 for(s = 0; s < mcount; s++) {
1358 for(c = nexttiled(clients, &monitors[s]); c; c = nexttiled(c->next, &monitors[s])) {
1359 if(c == sel)
1360 continue;
1361 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1362 wc.sibling = c->win;
1363 }
1364 }
1365 }
1366 XSync(dpy, False);
1367 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1368 }
1369
1370 void
1371 run(void) {
1372 char *p;
1373 char buf[sizeof stext];
1374 fd_set rd;
1375 int r, xfd;
1376 unsigned int len, offset;
1377 XEvent ev;
1378
1379 /* main event loop, also reads status text from stdin */
1380 XSync(dpy, False);
1381 xfd = ConnectionNumber(dpy);
1382 readin = True;
1383 offset = 0;
1384 len = sizeof stext - 1;
1385 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1386 while(running) {
1387 FD_ZERO(&rd);
1388 if(readin)
1389 FD_SET(STDIN_FILENO, &rd);
1390 FD_SET(xfd, &rd);
1391 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1392 if(errno == EINTR)
1393 continue;
1394 eprint("select failed\n");
1395 }
1396 if(FD_ISSET(STDIN_FILENO, &rd)) {
1397 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1398 case -1:
1399 strncpy(stext, strerror(errno), len);
1400 readin = False;
1401 break;
1402 case 0:
1403 strncpy(stext, "EOF", 4);
1404 readin = False;
1405 break;
1406 default:
1407 for(p = buf + offset; r > 0; p++, r--, offset++)
1408 if(*p == '\n' || *p == '\0') {
1409 *p = '\0';
1410 strncpy(stext, buf, len);
1411 p += r - 1; /* p is buf + offset + r - 1 */
1412 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1413 offset = r;
1414 if(r)
1415 memmove(buf, p - r + 1, r);
1416 break;
1417 }
1418 break;
1419 }
1420 drawbar();
1421 }
1422 while(XPending(dpy)) {
1423 XNextEvent(dpy, &ev);
1424 if(handler[ev.type])
1425 (handler[ev.type])(&ev); /* call handler */
1426 }
1427 }
1428 }
1429
1430 void
1431 scan(void) {
1432 unsigned int i, num;
1433 Window *wins, d1, d2;
1434 XWindowAttributes wa;
1435
1436 wins = NULL;
1437 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1438 for(i = 0; i < num; i++) {
1439 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1440 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1441 continue;
1442 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1443 manage(wins[i], &wa);
1444 }
1445 for(i = 0; i < num; i++) { /* now the transients */
1446 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1447 continue;
1448 if(XGetTransientForHint(dpy, wins[i], &d1)
1449 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1450 manage(wins[i], &wa);
1451 }
1452 }
1453 if(wins)
1454 XFree(wins);
1455 }
1456
1457 void
1458 setclientstate(Client *c, long state) {
1459 long data[] = {state, None};
1460
1461 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1462 PropModeReplace, (unsigned char *)data, 2);
1463 }
1464
1465 void
1466 setlayout(const char *arg) {
1467 unsigned int i;
1468 Monitor *m = &monitors[monitorat(-1, -1)];
1469
1470 if(!arg) {
1471 m->layout++;
1472 if(m->layout == &layouts[LENGTH(layouts)])
1473 m->layout = &layouts[0];
1474 }
1475 else {
1476 for(i = 0; i < LENGTH(layouts); i++)
1477 if(!strcmp(arg, layouts[i].symbol))
1478 break;
1479 if(i == LENGTH(layouts))
1480 return;
1481 m->layout = &layouts[i];
1482 }
1483 if(sel)
1484 arrange();
1485 else
1486 drawbar();
1487 }
1488
1489 void
1490 setmwfact(const char *arg) {
1491 double delta;
1492
1493 Monitor *m = &monitors[monitorat(-1, -1)];
1494
1495 if(!domwfact)
1496 return;
1497 /* arg handling, manipulate mwfact */
1498 if(arg == NULL)
1499 m->mwfact = MWFACT;
1500 else if(sscanf(arg, "%lf", &delta) == 1) {
1501 if(arg[0] == '+' || arg[0] == '-')
1502 m->mwfact += delta;
1503 else
1504 m->mwfact = delta;
1505 if(m->mwfact < 0.1)
1506 m->mwfact = 0.1;
1507 else if(m->mwfact > 0.9)
1508 m->mwfact = 0.9;
1509 }
1510 arrange();
1511 }
1512
1513 void
1514 setup(void) {
1515 unsigned int i, j, k;
1516 XModifierKeymap *modmap;
1517 XSetWindowAttributes wa;
1518 int s = 1;
1519 GC g;
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 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1530 PropModeReplace, (unsigned char *) netatom, NetLast);
1531
1532 /* init cursors */
1533 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1534 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1535 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1536
1537
1538 /* init modifier map */
1539 modmap = XGetModifierMapping(dpy);
1540 for(i = 0; i < 8; i++)
1541 for(j = 0; j < modmap->max_keypermod; j++) {
1542 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1543 == XKeysymToKeycode(dpy, XK_Num_Lock))
1544 numlockmask = (1 << i);
1545 }
1546 XFreeModifiermap(modmap);
1547
1548 /* select for events */
1549 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1550 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1551 wa.cursor = cursor[CurNormal];
1552 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1553 XSelectInput(dpy, root, wa.event_mask);
1554
1555 /* grab keys */
1556 grabkeys();
1557
1558 /* init tags */
1559 compileregs();
1560
1561 if (XineramaIsActive(dpy)) {
1562 info = XineramaQueryScreens(dpy, &s);
1563 }
1564
1565 monitors = emallocz(s*sizeof(Monitor));
1566 mcount = s;
1567
1568 for(i = 0; i < s; i++) {
1569 /* init geometry */
1570 if (mcount != 1) {
1571 monitors[i].sx = info[i].x_org;
1572 monitors[i].sy = info[i].y_org;
1573 monitors[i].sw = info[i].width;
1574 monitors[i].sh = info[i].height;
1575 }
1576 else {
1577 monitors[i].sx = 0;
1578 monitors[i].sy = 0;
1579 monitors[i].sw = DisplayWidth(dpy, screen);
1580 monitors[i].sh = DisplayHeight(dpy, screen);
1581 }
1582
1583 monitors[i].id = i;
1584 monitors[i].seltags = emallocz(sizeof initags);
1585 monitors[i].prevtags = emallocz(sizeof initags);
1586
1587 memcpy(monitors[i].seltags, initags, sizeof initags);
1588 memcpy(monitors[i].prevtags, initags, sizeof initags);
1589
1590 /* init appearance */
1591 monitors[i].dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1592 monitors[i].dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1593 monitors[i].dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1594 monitors[i].dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1595 monitors[i].dc.sel[ColBG] = getcolor(SELBGCOLOR);
1596 monitors[i].dc.sel[ColFG] = getcolor(SELFGCOLOR);
1597 initfont(&(monitors[i]), FONT);
1598 monitors[i].dc.h = bh = monitors[i].dc.font.height + 2;
1599
1600 /* init layouts */
1601 monitors[i].mwfact = MWFACT;
1602 monitors[i].layout = &layouts[0];
1603 for(blw = k = 0; k < LENGTH(layouts); k++) {
1604 j = textw(&monitors[i], layouts[k].symbol);
1605 if(j > blw)
1606 blw = j;
1607 }
1608
1609 bpos = BARPOS;
1610 wa.override_redirect = 1;
1611 wa.background_pixmap = ParentRelative;
1612 wa.event_mask = ButtonPressMask | ExposureMask;
1613
1614 /* init bars */
1615 monitors[i].barwin = XCreateWindow(dpy, root, monitors[i].sx, monitors[i].sy, monitors[i].sw, bh, 0,
1616 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1617 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1618 XDefineCursor(dpy, monitors[i].barwin, cursor[CurNormal]);
1619 updatebarpos(&monitors[i]);
1620 XMapRaised(dpy, monitors[i].barwin);
1621 strcpy(stext, "dwm-"VERSION);
1622 monitors[i].dc.drawable = XCreatePixmap(dpy, root, monitors[i].sw, bh, DefaultDepth(dpy, screen));
1623 g = XCreateGC(dpy, root, 0, 0);
1624 monitors[i].dc.gc = XCreateGC(dpy, root, 0, 0);
1625 XSetLineAttributes(dpy, monitors[i].dc.gc, 1, LineSolid, CapButt, JoinMiter);
1626 if(!monitors[i].dc.font.set)
1627 XSetFont(dpy, monitors[i].dc.gc, monitors[i].dc.font.xfont->fid);
1628 }
1629 }
1630
1631 void
1632 spawn(const char *arg) {
1633 static char *shell = NULL;
1634
1635 if(!shell && !(shell = getenv("SHELL")))
1636 shell = "/bin/sh";
1637 if(!arg)
1638 return;
1639 /* The double-fork construct avoids zombie processes and keeps the code
1640 * clean from stupid signal handlers. */
1641 if(fork() == 0) {
1642 if(fork() == 0) {
1643 if(dpy)
1644 close(ConnectionNumber(dpy));
1645 setsid();
1646 execl(shell, shell, "-c", arg, (char *)NULL);
1647 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1648 perror(" failed");
1649 }
1650 exit(0);
1651 }
1652 wait(0);
1653 }
1654
1655 void
1656 tag(const char *arg) {
1657 unsigned int i;
1658
1659 if(!sel)
1660 return;
1661 for(i = 0; i < LENGTH(tags); i++)
1662 sel->tags[i] = (NULL == arg);
1663 sel->tags[idxoftag(arg)] = True;
1664 arrange();
1665 }
1666
1667 unsigned int
1668 textnw(Monitor *m, const char *text, unsigned int len) {
1669 XRectangle r;
1670
1671 if(m->dc.font.set) {
1672 XmbTextExtents(m->dc.font.set, text, len, NULL, &r);
1673 return r.width;
1674 }
1675 return XTextWidth(m->dc.font.xfont, text, len);
1676 }
1677
1678 unsigned int
1679 textw(Monitor *m, const char *text) {
1680 return textnw(m, text, strlen(text)) + m->dc.font.height;
1681 }
1682
1683 void
1684 tile(void) {
1685 unsigned int i, n, nx, ny, nw, nh, mw, th;
1686 int s;
1687 Client *c, *mc;
1688
1689 domwfact = dozoom = True;
1690
1691 nw = 0; /* gcc stupidity requires this */
1692
1693 for (s = 0; s < mcount; s++) {
1694 Monitor *m = &monitors[s];
1695
1696 for(n = 0, c = nexttiled(clients, m); c; c = nexttiled(c->next, m))
1697 n++;
1698
1699 for(i = 0, c = mc = nexttiled(clients, m); c; c = nexttiled(c->next, m)) {
1700 /* window geoms */
1701 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1702 th = (n > 1) ? m->wah / (n - 1) : 0;
1703 if(n > 1 && th < bh)
1704 th = m->wah;
1705 if(i == 0) { /* master */
1706 nx = m->wax;
1707 ny = m->way;
1708 nw = mw - 2 * c->border;
1709 nh = m->wah - 2 * c->border;
1710 }
1711 else { /* tile window */
1712 if(i == 1) {
1713 ny = m->way;
1714 nx += mc->w + 2 * mc->border;
1715 nw = m->waw - mw - 2 * c->border;
1716 }
1717 if(i + 1 == n) /* remainder */
1718 nh = (m->way + m->wah) - ny - 2 * c->border;
1719 else
1720 nh = th - 2 * c->border;
1721 }
1722 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1723 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1724 /* client doesn't accept size constraints */
1725 resize(c, nx, ny, nw, nh, False);
1726 if(n > 1 && th != m->wah)
1727 ny = c->y + c->h + 2 * c->border;
1728
1729 i++;
1730 }
1731 }
1732 }
1733 void
1734 togglebar(const char *arg) {
1735 if(bpos == BarOff)
1736 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1737 else
1738 bpos = BarOff;
1739 updatebarpos(&monitors[monitorat(-1,-1)]);
1740 arrange();
1741 }
1742
1743 void
1744 togglefloating(const char *arg) {
1745 if(!sel)
1746 return;
1747 sel->isfloating = !sel->isfloating;
1748 if(sel->isfloating)
1749 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1750 arrange();
1751 }
1752
1753 void
1754 toggletag(const char *arg) {
1755 unsigned int i, j;
1756
1757 if(!sel)
1758 return;
1759 i = idxoftag(arg);
1760 sel->tags[i] = !sel->tags[i];
1761 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1762 if(j == LENGTH(tags))
1763 sel->tags[i] = True; /* at least one tag must be enabled */
1764 arrange();
1765 }
1766
1767 void
1768 toggleview(const char *arg) {
1769 unsigned int i, j;
1770
1771 Monitor *m = &monitors[monitorat(-1, -1)];
1772
1773 i = idxoftag(arg);
1774 m->seltags[i] = !m->seltags[i];
1775 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1776 if(j == LENGTH(tags))
1777 m->seltags[i] = True; /* at least one tag must be viewed */
1778 arrange();
1779 }
1780
1781 void
1782 unban(Client *c) {
1783 if(!c->isbanned)
1784 return;
1785 XMoveWindow(dpy, c->win, c->x, c->y);
1786 c->isbanned = False;
1787 }
1788
1789 void
1790 unmanage(Client *c) {
1791 XWindowChanges wc;
1792
1793 wc.border_width = c->oldborder;
1794 /* The server grab construct avoids race conditions. */
1795 XGrabServer(dpy);
1796 XSetErrorHandler(xerrordummy);
1797 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1798 detach(c);
1799 detachstack(c);
1800 if(sel == c)
1801 focus(NULL);
1802 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1803 setclientstate(c, WithdrawnState);
1804 free(c->tags);
1805 free(c);
1806 XSync(dpy, False);
1807 XSetErrorHandler(xerror);
1808 XUngrabServer(dpy);
1809 arrange();
1810 }
1811
1812 void
1813 unmapnotify(XEvent *e) {
1814 Client *c;
1815 XUnmapEvent *ev = &e->xunmap;
1816
1817 if((c = getclient(ev->window)))
1818 unmanage(c);
1819 }
1820
1821 void
1822 updatebarpos(Monitor *s) {
1823 XEvent ev;
1824
1825 s->wax = s->sx;
1826 s->way = s->sy;
1827 s->wah = s->sh;
1828 s->waw = s->sw;
1829 switch(bpos) {
1830 default:
1831 s->wah -= bh;
1832 s->way += bh;
1833 XMoveWindow(dpy, s->barwin, s->sx, s->sy);
1834 break;
1835 case BarBot:
1836 s->wah -= bh;
1837 XMoveWindow(dpy, s->barwin, s->sx, s->sy + s->wah);
1838 break;
1839 case BarOff:
1840 XMoveWindow(dpy, s->barwin, s->sx, s->sy - bh);
1841 break;
1842 }
1843 XSync(dpy, False);
1844 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1845 }
1846
1847 void
1848 updatesizehints(Client *c) {
1849 long msize;
1850 XSizeHints size;
1851
1852 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1853 size.flags = PSize;
1854 c->flags = size.flags;
1855 if(c->flags & PBaseSize) {
1856 c->basew = size.base_width;
1857 c->baseh = size.base_height;
1858 }
1859 else if(c->flags & PMinSize) {
1860 c->basew = size.min_width;
1861 c->baseh = size.min_height;
1862 }
1863 else
1864 c->basew = c->baseh = 0;
1865 if(c->flags & PResizeInc) {
1866 c->incw = size.width_inc;
1867 c->inch = size.height_inc;
1868 }
1869 else
1870 c->incw = c->inch = 0;
1871 if(c->flags & PMaxSize) {
1872 c->maxw = size.max_width;
1873 c->maxh = size.max_height;
1874 }
1875 else
1876 c->maxw = c->maxh = 0;
1877 if(c->flags & PMinSize) {
1878 c->minw = size.min_width;
1879 c->minh = size.min_height;
1880 }
1881 else if(c->flags & PBaseSize) {
1882 c->minw = size.base_width;
1883 c->minh = size.base_height;
1884 }
1885 else
1886 c->minw = c->minh = 0;
1887 if(c->flags & PAspect) {
1888 c->minax = size.min_aspect.x;
1889 c->maxax = size.max_aspect.x;
1890 c->minay = size.min_aspect.y;
1891 c->maxay = size.max_aspect.y;
1892 }
1893 else
1894 c->minax = c->maxax = c->minay = c->maxay = 0;
1895 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1896 && c->maxw == c->minw && c->maxh == c->minh);
1897 }
1898
1899 void
1900 updatetitle(Client *c) {
1901 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1902 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1903 }
1904
1905 /* There's no way to check accesses to destroyed windows, thus those cases are
1906 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1907 * default error handler, which may call exit. */
1908 int
1909 xerror(Display *dpy, XErrorEvent *ee) {
1910 if(ee->error_code == BadWindow
1911 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1912 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1913 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1914 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1915 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1916 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1917 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1918 return 0;
1919 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1920 ee->request_code, ee->error_code);
1921 return xerrorxlib(dpy, ee); /* may call exit */
1922 }
1923
1924 int
1925 xerrordummy(Display *dsply, XErrorEvent *ee) {
1926 return 0;
1927 }
1928
1929 /* Startup Error handler to check if another window manager
1930 * is already running. */
1931 int
1932 xerrorstart(Display *dsply, XErrorEvent *ee) {
1933 otherwm = True;
1934 return -1;
1935 }
1936
1937 void
1938 view(const char *arg) {
1939 unsigned int i;
1940
1941 Monitor *m = &monitors[monitorat(-1, -1)];
1942
1943 memcpy(m->prevtags, m->seltags, sizeof initags);
1944 for(i = 0; i < LENGTH(tags); i++)
1945 m->seltags[i] = (NULL == arg);
1946 m->seltags[idxoftag(arg)] = True;
1947 arrange();
1948 }
1949
1950 void
1951 viewprevtag(const char *arg) {
1952 static Bool tmp[LENGTH(tags)];
1953
1954 Monitor *m = &monitors[monitorat(-1, -1)];
1955
1956 memcpy(tmp, m->seltags, sizeof initags);
1957 memcpy(m->seltags, m->prevtags, sizeof initags);
1958 memcpy(m->prevtags, tmp, sizeof initags);
1959 arrange();
1960 }
1961
1962 void
1963 zoom(const char *arg) {
1964 Client *c;
1965
1966 if(!sel || !dozoom || sel->isfloating)
1967 return;
1968 if((c = sel) == nexttiled(clients, &monitors[c->monitor]))
1969 if(!(c = nexttiled(c->next, &monitors[c->monitor])))
1970 return;
1971 detach(c);
1972 attach(c);
1973 focus(c);
1974 arrange();
1975 }
1976
1977 int
1978 monitorat(int x, int y) {
1979 int i;
1980
1981 if(!XineramaIsActive(dpy))
1982 return 0;
1983
1984 if (x < 0 || y < 0) {
1985 Window win;
1986 unsigned int mask;
1987 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1988 }
1989
1990 for(i = 0; i < mcount; i++)
1991 if((x < 0 || (x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw))
1992 && (y < 0 || (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)))
1993 {
1994 return i;
1995 }
1996 return 0;
1997 }
1998
1999 void
2000 movetomonitor(const char *arg) {
2001 if (sel) {
2002 sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
2003
2004 memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
2005 resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
2006 arrange();
2007 }
2008 }
2009
2010 void
2011 selectmonitor(const char *arg) {
2012 Monitor *m = &monitors[arg ? atoi(arg) : (monitorat(-1, -1)+1) % mcount];
2013
2014 XWarpPointer(dpy, None, root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2015 focus(NULL);
2016 }
2017
2018
2019 int
2020 main(int argc, char *argv[]) {
2021 if(argc == 2 && !strcmp("-v", argv[1]))
2022 eprint("dwm-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, "
2023 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy\n");
2024 else if(argc != 1)
2025 eprint("usage: dwm [-v]\n");
2026
2027 setlocale(LC_CTYPE, "");
2028 if(!(dpy = XOpenDisplay(0)))
2029 eprint("dwm: cannot open display\n");
2030 screen = DefaultScreen(dpy);
2031 root = RootWindow(dpy, screen);
2032
2033 checkotherwm();
2034 setup();
2035 drawbar();
2036 scan();
2037 run();
2038 cleanup();
2039
2040 XCloseDisplay(dpy);
2041 return 0;
2042 }