dwm.c (view raw)
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 */
56enum { BarTop, BarBot, BarOff }; /* bar position */
57enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
58enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
59enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
60enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
61
62/* typedefs */
63typedef struct Client Client;
64struct 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, isurgent;
72 Bool *tags;
73 Client *next;
74 Client *prev;
75 Client *snext;
76 Window win;
77 int monitor;
78};
79
80typedef 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
95typedef struct {
96 unsigned long mod;
97 KeySym keysym;
98 void (*func)(const char *arg);
99 const char *arg;
100} Key;
101
102typedef struct {
103 const char *symbol;
104 void (*arrange)(void);
105} Layout;
106
107typedef struct {
108 const char *prop;
109 const char *tags;
110 Bool isfloating;
111 int monitor;
112} Rule;
113
114typedef struct {
115 regex_t *propregex;
116 regex_t *tagregex;
117} Regs;
118
119typedef 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 */
132void applyrules(Client *c);
133void arrange(void);
134void attach(Client *c);
135void attachstack(Client *c);
136void ban(Client *c);
137void buttonpress(XEvent *e);
138void checkotherwm(void);
139void cleanup(void);
140void compileregs(void);
141void configure(Client *c);
142void configurenotify(XEvent *e);
143void configurerequest(XEvent *e);
144void destroynotify(XEvent *e);
145void detach(Client *c);
146void detachstack(Client *c);
147void drawbar(void);
148void drawsquare(Monitor *, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149void drawtext(Monitor *, const char *text, unsigned long col[ColLast], Bool invert);
150void *emallocz(unsigned int size);
151void enternotify(XEvent *e);
152void eprint(const char *errstr, ...);
153void expose(XEvent *e);
154void floating(void); /* default floating layout */
155void focus(Client *c);
156void focusin(XEvent *e);
157void focusnext(const char *arg);
158void focusprev(const char *arg);
159Client *getclient(Window w);
160unsigned long getcolor(const char *colstr, int screen);
161long getstate(Window w);
162Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
163void grabbuttons(Client *c, Bool focused);
164void grabkeys(void);
165unsigned int idxoftag(const char *tag);
166void initfont(Monitor*, const char *fontstr);
167Bool isoccupied(Monitor *m, unsigned int t);
168Bool isprotodel(Client *c);
169Bool isurgent(int monitor, unsigned int t);
170Bool isvisible(Client *c, int monitor);
171void keypress(XEvent *e);
172void killclient(const char *arg);
173void manage(Window w, XWindowAttributes *wa);
174void mappingnotify(XEvent *e);
175void maprequest(XEvent *e);
176void movemouse(Client *c);
177Client *nexttiled(Client *c, int monitor);
178void propertynotify(XEvent *e);
179void quit(const char *arg);
180void reapply(const char *arg);
181void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
182void resizemouse(Client *c);
183void restack(void);
184void run(void);
185void scan(void);
186void setclientstate(Client *c, long state);
187void setlayout(const char *arg);
188void setmwfact(const char *arg);
189void setup(void);
190void spawn(const char *arg);
191void tag(const char *arg);
192unsigned int textnw(Monitor*, const char *text, unsigned int len);
193unsigned int textw(Monitor*, const char *text);
194void tile(void);
195void togglebar(const char *arg);
196void togglefloating(const char *arg);
197void toggletag(const char *arg);
198void toggleview(const char *arg);
199void unban(Client *c);
200void unmanage(Client *c);
201void unmapnotify(XEvent *e);
202void updatebarpos(Monitor *m);
203void updatesizehints(Client *c);
204void updatetitle(Client *c);
205void updatewmhints(Client *c);
206void view(const char *arg);
207void viewprevtag(const char *arg); /* views previous selected tags */
208int xerror(Display *dpy, XErrorEvent *ee);
209int xerrordummy(Display *dsply, XErrorEvent *ee);
210int xerrorstart(Display *dsply, XErrorEvent *ee);
211void zoom(const char *arg);
212int monitorat(void);
213void movetomonitor(const char *arg);
214void selectmonitor(const char *arg);
215
216/* variables */
217char stext[256];
218int mcount = 1;
219int (*xerrorxlib)(Display *, XErrorEvent *);
220unsigned int bh, bpos;
221unsigned int blw = 0;
222unsigned int numlockmask = 0;
223void (*handler[LASTEvent]) (XEvent *) = {
224 [ButtonPress] = buttonpress,
225 [ConfigureRequest] = configurerequest,
226 [ConfigureNotify] = configurenotify,
227 [DestroyNotify] = destroynotify,
228 [EnterNotify] = enternotify,
229 [Expose] = expose,
230 [FocusIn] = focusin,
231 [KeyPress] = keypress,
232 [MappingNotify] = mappingnotify,
233 [MapRequest] = maprequest,
234 [PropertyNotify] = propertynotify,
235 [UnmapNotify] = unmapnotify
236};
237Atom wmatom[WMLast], netatom[NetLast];
238Bool isxinerama = False;
239Bool domwfact = True;
240Bool dozoom = True;
241Bool otherwm, readin;
242Bool running = True;
243Client *clients = NULL;
244Client *sel = NULL;
245Client *stack = NULL;
246Cursor cursor[CurLast];
247Display *dpy;
248DC dc = {0};
249Regs *regs = NULL;
250Monitor *monitors;
251int selmonitor = 0;
252
253/* configuration, allows nested code to access above variables */
254#include "config.h"
255
256//Bool prevtags[LENGTH(tags)];
257
258/* function implementations */
259void
260applyrules(Client *c) {
261 static char buf[512];
262 unsigned int i, j;
263 regmatch_t tmp;
264 Bool matched_tag = False;
265 Bool matched_monitor = False;
266 XClassHint ch = { 0 };
267
268 /* rule matching */
269 XGetClassHint(dpy, c->win, &ch);
270 snprintf(buf, sizeof buf, "%s:%s:%s",
271 ch.res_class ? ch.res_class : "",
272 ch.res_name ? ch.res_name : "", c->name);
273 for(i = 0; i < LENGTH(rules); i++)
274 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
275 if (rules[i].monitor >= 0 && rules[i].monitor < mcount) {
276 matched_monitor = True;
277 c->monitor = rules[i].monitor;
278 }
279
280 c->isfloating = rules[i].isfloating;
281 for(j = 0; regs[i].tagregex && j < LENGTH(tags); j++) {
282 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
283 matched_tag = True;
284 c->tags[j] = True;
285 }
286 }
287 }
288 if(ch.res_class)
289 XFree(ch.res_class);
290 if(ch.res_name)
291 XFree(ch.res_name);
292 if(!matched_tag)
293 memcpy(c->tags, monitors[monitorat()].seltags, sizeof initags);
294 if (!matched_monitor)
295 c->monitor = monitorat();
296}
297
298void
299arrange(void) {
300 Client *c;
301
302 for(c = clients; c; c = c->next)
303 if(isvisible(c, c->monitor))
304 unban(c);
305 else
306 ban(c);
307
308 monitors[selmonitor].layout->arrange();
309 focus(NULL);
310 restack();
311}
312
313void
314attach(Client *c) {
315 if(clients)
316 clients->prev = c;
317 c->next = clients;
318 clients = c;
319}
320
321void
322attachstack(Client *c) {
323 c->snext = stack;
324 stack = c;
325}
326
327void
328ban(Client *c) {
329 if(c->isbanned)
330 return;
331 XMoveWindow(dpy, c->win, c->x + 3 * monitors[c->monitor].sw, c->y);
332 c->isbanned = True;
333}
334
335void
336buttonpress(XEvent *e) {
337 unsigned int i, x;
338 Client *c;
339 XButtonPressedEvent *ev = &e->xbutton;
340
341 Monitor *m = &monitors[monitorat()];
342
343 if(ev->window == m->barwin) {
344 x = 0;
345 for(i = 0; i < LENGTH(tags); i++) {
346 x += textw(m, tags[i]);
347 if(ev->x < x) {
348 if(ev->button == Button1) {
349 if(ev->state & MODKEY)
350 tag(tags[i]);
351 else
352 view(tags[i]);
353 }
354 else if(ev->button == Button3) {
355 if(ev->state & MODKEY)
356 toggletag(tags[i]);
357 else
358 toggleview(tags[i]);
359 }
360 return;
361 }
362 }
363 if((ev->x < x + blw) && ev->button == Button1)
364 setlayout(NULL);
365 }
366 else if((c = getclient(ev->window))) {
367 focus(c);
368 if(CLEANMASK(ev->state) != MODKEY)
369 return;
370 if(ev->button == Button1) {
371 restack();
372 movemouse(c);
373 }
374 else if(ev->button == Button2) {
375 if((floating != m->layout->arrange) && c->isfloating)
376 togglefloating(NULL);
377 else
378 zoom(NULL);
379 }
380 else if(ev->button == Button3 && !c->isfixed) {
381 restack();
382 resizemouse(c);
383 }
384 }
385}
386
387void
388checkotherwm(void) {
389 otherwm = False;
390 XSetErrorHandler(xerrorstart);
391
392 /* this causes an error if some other window manager is running */
393 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
394 XSync(dpy, False);
395 if(otherwm)
396 eprint("dwm: another window manager is already running\n");
397 XSync(dpy, False);
398 XSetErrorHandler(NULL);
399 xerrorxlib = XSetErrorHandler(xerror);
400 XSync(dpy, False);
401}
402
403void
404cleanup(void) {
405 unsigned int i;
406 close(STDIN_FILENO);
407 while(stack) {
408 unban(stack);
409 unmanage(stack);
410 }
411 for(i = 0; i < mcount; i++) {
412 Monitor *m = &monitors[i];
413 if(m->dc.font.set)
414 XFreeFontSet(dpy, m->dc.font.set);
415 else
416 XFreeFont(dpy, m->dc.font.xfont);
417 XUngrabKey(dpy, AnyKey, AnyModifier, m->root);
418 XFreePixmap(dpy, m->dc.drawable);
419 XFreeGC(dpy, m->dc.gc);
420 XDestroyWindow(dpy, m->barwin);
421 XFreeCursor(dpy, cursor[CurNormal]);
422 XFreeCursor(dpy, cursor[CurResize]);
423 XFreeCursor(dpy, cursor[CurMove]);
424 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
425 XSync(dpy, False);
426 }
427}
428
429void
430compileregs(void) {
431 unsigned int i;
432 regex_t *reg;
433
434 if(regs)
435 return;
436 regs = emallocz(LENGTH(rules) * sizeof(Regs));
437 for(i = 0; i < LENGTH(rules); i++) {
438 if(rules[i].prop) {
439 reg = emallocz(sizeof(regex_t));
440 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
441 free(reg);
442 else
443 regs[i].propregex = reg;
444 }
445 if(rules[i].tags) {
446 reg = emallocz(sizeof(regex_t));
447 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
448 free(reg);
449 else
450 regs[i].tagregex = reg;
451 }
452 }
453}
454
455void
456configure(Client *c) {
457 XConfigureEvent ce;
458
459 ce.type = ConfigureNotify;
460 ce.display = dpy;
461 ce.event = c->win;
462 ce.window = c->win;
463 ce.x = c->x;
464 ce.y = c->y;
465 ce.width = c->w;
466 ce.height = c->h;
467 ce.border_width = c->border;
468 ce.above = None;
469 ce.override_redirect = False;
470 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
471}
472
473void
474configurenotify(XEvent *e) {
475 XConfigureEvent *ev = &e->xconfigure;
476 Monitor *m = &monitors[selmonitor];
477
478 if(ev->window == m->root && (ev->width != m->sw || ev->height != m->sh)) {
479 m->sw = ev->width;
480 m->sh = ev->height;
481 XFreePixmap(dpy, dc.drawable);
482 dc.drawable = XCreatePixmap(dpy, m->root, m->sw, bh, DefaultDepth(dpy, m->screen));
483 XResizeWindow(dpy, m->barwin, m->sw, bh);
484 updatebarpos(m);
485 arrange();
486 }
487}
488
489void
490configurerequest(XEvent *e) {
491 Client *c;
492 XConfigureRequestEvent *ev = &e->xconfigurerequest;
493 XWindowChanges wc;
494
495 if((c = getclient(ev->window))) {
496 Monitor *m = &monitors[c->monitor];
497 if(ev->value_mask & CWBorderWidth)
498 c->border = ev->border_width;
499 if(c->isfixed || c->isfloating || (floating == m->layout->arrange)) {
500 if(ev->value_mask & CWX)
501 c->x = m->sx+ev->x;
502 if(ev->value_mask & CWY)
503 c->y = m->sy+ev->y;
504 if(ev->value_mask & CWWidth)
505 c->w = ev->width;
506 if(ev->value_mask & CWHeight)
507 c->h = ev->height;
508 if((c->x - m->sx + c->w) > m->sw && c->isfloating)
509 c->x = m->sx + (m->sw / 2 - c->w / 2); /* center in x direction */
510 if((c->y - m->sy + c->h) > m->sh && c->isfloating)
511 c->y = m->sy + (m->sh / 2 - c->h / 2); /* center in y direction */
512 if((ev->value_mask & (CWX | CWY))
513 && !(ev->value_mask & (CWWidth | CWHeight)))
514 configure(c);
515 if(isvisible(c, monitorat()))
516 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
517 }
518 else
519 configure(c);
520 }
521 else {
522 wc.x = ev->x;
523 wc.y = ev->y;
524 wc.width = ev->width;
525 wc.height = ev->height;
526 wc.border_width = ev->border_width;
527 wc.sibling = ev->above;
528 wc.stack_mode = ev->detail;
529 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
530 }
531 XSync(dpy, False);
532}
533
534void
535destroynotify(XEvent *e) {
536 Client *c;
537 XDestroyWindowEvent *ev = &e->xdestroywindow;
538
539 if((c = getclient(ev->window)))
540 unmanage(c);
541}
542
543void
544detach(Client *c) {
545 if(c->prev)
546 c->prev->next = c->next;
547 if(c->next)
548 c->next->prev = c->prev;
549 if(c == clients)
550 clients = c->next;
551 c->next = c->prev = NULL;
552}
553
554void
555detachstack(Client *c) {
556 Client **tc;
557
558 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
559 *tc = c->snext;
560}
561
562void
563drawbar(void) {
564 int i, j, x;
565
566 for(i = 0; i < mcount; i++) {
567 Monitor *m = &monitors[i];
568 m->dc.x = 0;
569 for(j = 0; j < LENGTH(tags); j++) {
570 m->dc.w = textw(m, tags[j]);
571 if(m->seltags[j]) {
572 drawtext(m, tags[j], m->dc.sel, isurgent(i, j));
573 drawsquare(m, sel && sel->tags[j] && sel->monitor == selmonitor,
574 isoccupied(m, j), isurgent(i, j), m->dc.sel);
575 }
576 else {
577 drawtext(m, tags[j], m->dc.norm, isurgent(i, j));
578 drawsquare(m, sel && sel->tags[j] && sel->monitor == selmonitor,
579 isoccupied(m, j), isurgent(i, j), m->dc.norm);
580 }
581 m->dc.x += m->dc.w;
582 }
583 m->dc.w = blw;
584 drawtext(m, m->layout->symbol, m->dc.norm, False);
585 x = m->dc.x + m->dc.w;
586 m->dc.w = textw(m, stext);
587 m->dc.x = m->sw - m->dc.w;
588 if(m->dc.x < x) {
589 m->dc.x = x;
590 m->dc.w = m->sw - x;
591 }
592 drawtext(m, stext, m->dc.norm, False);
593 if((m->dc.w = m->dc.x - x) > bh) {
594 m->dc.x = x;
595 if(sel && sel->monitor == selmonitor) {
596 drawtext(m, sel->name, m->dc.sel, False);
597 drawsquare(m, False, sel->isfloating, False, m->dc.sel);
598 }
599 else
600 drawtext(m, NULL, m->dc.norm, False);
601 }
602 XCopyArea(dpy, m->dc.drawable, m->barwin, m->dc.gc, 0, 0, m->sw, bh, 0, 0);
603 XSync(dpy, False);
604 }
605}
606
607void
608drawsquare(Monitor *m, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
609 int x;
610 XGCValues gcv;
611 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
612
613 gcv.foreground = col[invert ? ColBG : ColFG];
614 XChangeGC(dpy, m->dc.gc, GCForeground, &gcv);
615 x = (m->dc.font.ascent + m->dc.font.descent + 2) / 4;
616 r.x = m->dc.x + 1;
617 r.y = m->dc.y + 1;
618 if(filled) {
619 r.width = r.height = x + 1;
620 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
621 }
622 else if(empty) {
623 r.width = r.height = x;
624 XDrawRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
625 }
626}
627
628void
629drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert) {
630 int x, y, w, h;
631 static char buf[256];
632 unsigned int len, olen;
633 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
634
635 XSetForeground(dpy, m->dc.gc, col[invert ? ColFG : ColBG]);
636 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
637 if(!text)
638 return;
639 w = 0;
640 olen = len = strlen(text);
641 if(len >= sizeof buf)
642 len = sizeof buf - 1;
643 memcpy(buf, text, len);
644 buf[len] = 0;
645 h = m->dc.font.ascent + m->dc.font.descent;
646 y = m->dc.y + (m->dc.h / 2) - (h / 2) + m->dc.font.ascent;
647 x = m->dc.x + (h / 2);
648 /* shorten text if necessary */
649 while(len && (w = textnw(m, buf, len)) > m->dc.w - h)
650 buf[--len] = 0;
651 if(len < olen) {
652 if(len > 1)
653 buf[len - 1] = '.';
654 if(len > 2)
655 buf[len - 2] = '.';
656 if(len > 3)
657 buf[len - 3] = '.';
658 }
659 if(w > m->dc.w)
660 return; /* too long */
661 XSetForeground(dpy, m->dc.gc, col[invert ? ColBG : ColFG]);
662 if(m->dc.font.set)
663 XmbDrawString(dpy, m->dc.drawable, m->dc.font.set, m->dc.gc, x, y, buf, len);
664 else
665 XDrawString(dpy, m->dc.drawable, m->dc.gc, x, y, buf, len);
666}
667
668void *
669emallocz(unsigned int size) {
670 void *res = calloc(1, size);
671
672 if(!res)
673 eprint("fatal: could not malloc() %u bytes\n", size);
674 return res;
675}
676
677void
678enternotify(XEvent *e) {
679 Client *c;
680 XCrossingEvent *ev = &e->xcrossing;
681
682 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior);
683 //return;
684 if((c = getclient(ev->window)))
685 focus(c);
686 else {
687 selmonitor = monitorat();
688 fprintf(stderr, "updating selmonitor %d\n", selmonitor);
689 focus(NULL);
690 }
691}
692
693void
694eprint(const char *errstr, ...) {
695 va_list ap;
696
697 va_start(ap, errstr);
698 vfprintf(stderr, errstr, ap);
699 va_end(ap);
700 exit(EXIT_FAILURE);
701}
702
703void
704expose(XEvent *e) {
705 XExposeEvent *ev = &e->xexpose;
706
707 if(ev->count == 0) {
708 if(ev->window == monitors[selmonitor].barwin)
709 drawbar();
710 }
711}
712
713void
714floating(void) { /* default floating layout */
715 Client *c;
716
717 domwfact = dozoom = False;
718 for(c = clients; c; c = c->next)
719 if(isvisible(c, selmonitor))
720 resize(c, c->x, c->y, c->w, c->h, True);
721}
722
723void
724focus(Client *c) {
725 Monitor *m;
726
727 if(c)
728 selmonitor = c->monitor;
729 m = &monitors[selmonitor];
730 if(!c || (c && !isvisible(c, selmonitor)))
731 for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
732 if(sel && sel != c) {
733 grabbuttons(sel, False);
734 XSetWindowBorder(dpy, sel->win, monitors[sel->monitor].dc.norm[ColBorder]);
735 }
736 if(c) {
737 detachstack(c);
738 attachstack(c);
739 grabbuttons(c, True);
740 }
741 sel = c;
742 drawbar();
743 if(c) {
744 XSetWindowBorder(dpy, c->win, m->dc.sel[ColBorder]);
745 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
746 selmonitor = c->monitor;
747 }
748 else {
749 XSetInputFocus(dpy, m->root, RevertToPointerRoot, CurrentTime);
750 }
751}
752
753void
754focusin(XEvent *e) { /* there are some broken focus acquiring clients */
755 XFocusChangeEvent *ev = &e->xfocus;
756
757 if(sel && ev->window != sel->win)
758 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
759}
760
761void
762focusnext(const char *arg) {
763 Client *c;
764
765 if(!sel)
766 return;
767 for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
768 if(!c)
769 for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
770 if(c) {
771 focus(c);
772 restack();
773 }
774}
775
776void
777focusprev(const char *arg) {
778 Client *c;
779
780 if(!sel)
781 return;
782 for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
783 if(!c) {
784 for(c = clients; c && c->next; c = c->next);
785 for(; c && !isvisible(c, selmonitor); c = c->prev);
786 }
787 if(c) {
788 focus(c);
789 restack();
790 }
791}
792
793Client *
794getclient(Window w) {
795 Client *c;
796
797 for(c = clients; c && c->win != w; c = c->next);
798 return c;
799}
800
801unsigned long
802getcolor(const char *colstr, int screen) {
803 Colormap cmap = DefaultColormap(dpy, screen);
804 XColor color;
805
806 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
807 eprint("error, cannot allocate color '%s'\n", colstr);
808 return color.pixel;
809}
810
811long
812getstate(Window w) {
813 int format, status;
814 long result = -1;
815 unsigned char *p = NULL;
816 unsigned long n, extra;
817 Atom real;
818
819 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
820 &real, &format, &n, &extra, (unsigned char **)&p);
821 if(status != Success)
822 return -1;
823 if(n != 0)
824 result = *p;
825 XFree(p);
826 return result;
827}
828
829Bool
830gettextprop(Window w, Atom atom, char *text, unsigned int size) {
831 char **list = NULL;
832 int n;
833 XTextProperty name;
834
835 if(!text || size == 0)
836 return False;
837 text[0] = '\0';
838 XGetTextProperty(dpy, w, &name, atom);
839 if(!name.nitems)
840 return False;
841 if(name.encoding == XA_STRING)
842 strncpy(text, (char *)name.value, size - 1);
843 else {
844 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
845 && n > 0 && *list) {
846 strncpy(text, *list, size - 1);
847 XFreeStringList(list);
848 }
849 }
850 text[size - 1] = '\0';
851 XFree(name.value);
852 return True;
853}
854
855void
856grabbuttons(Client *c, Bool focused) {
857 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
858
859 if(focused) {
860 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
861 GrabModeAsync, GrabModeSync, None, None);
862 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
863 GrabModeAsync, GrabModeSync, None, None);
864 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
865 GrabModeAsync, GrabModeSync, None, None);
866 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
867 GrabModeAsync, GrabModeSync, None, None);
868
869 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
870 GrabModeAsync, GrabModeSync, None, None);
871 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
872 GrabModeAsync, GrabModeSync, None, None);
873 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
874 GrabModeAsync, GrabModeSync, None, None);
875 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
876 GrabModeAsync, GrabModeSync, None, None);
877
878 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
879 GrabModeAsync, GrabModeSync, None, None);
880 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
881 GrabModeAsync, GrabModeSync, None, None);
882 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
883 GrabModeAsync, GrabModeSync, None, None);
884 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
885 GrabModeAsync, GrabModeSync, None, None);
886 }
887 else
888 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
889 GrabModeAsync, GrabModeSync, None, None);
890}
891
892void
893grabkeys(void) {
894 unsigned int i, j;
895 KeyCode code;
896 XModifierKeymap *modmap;
897
898 /* init modifier map */
899 modmap = XGetModifierMapping(dpy);
900 for(i = 0; i < 8; i++)
901 for(j = 0; j < modmap->max_keypermod; j++) {
902 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
903 numlockmask = (1 << i);
904 }
905 XFreeModifiermap(modmap);
906
907 for(i = 0; i < mcount; i++) {
908 Monitor *m = &monitors[i];
909 XUngrabKey(dpy, AnyKey, AnyModifier, m->root);
910 for(j = 0; j < LENGTH(keys); j++) {
911 code = XKeysymToKeycode(dpy, keys[j].keysym);
912 XGrabKey(dpy, code, keys[j].mod, m->root, True,
913 GrabModeAsync, GrabModeAsync);
914 XGrabKey(dpy, code, keys[j].mod | LockMask, m->root, True,
915 GrabModeAsync, GrabModeAsync);
916 XGrabKey(dpy, code, keys[j].mod | numlockmask, m->root, True,
917 GrabModeAsync, GrabModeAsync);
918 XGrabKey(dpy, code, keys[j].mod | numlockmask | LockMask, m->root, True,
919 GrabModeAsync, GrabModeAsync);
920 }
921 }
922}
923
924unsigned int
925idxoftag(const char *tag) {
926 unsigned int i;
927
928 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
929 return (i < LENGTH(tags)) ? i : 0;
930}
931
932void
933initfont(Monitor *m, const char *fontstr) {
934 char *def, **missing;
935 int i, n;
936
937 missing = NULL;
938 if(m->dc.font.set)
939 XFreeFontSet(dpy, m->dc.font.set);
940 m->dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
941 if(missing) {
942 while(n--)
943 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
944 XFreeStringList(missing);
945 }
946 if(m->dc.font.set) {
947 XFontSetExtents *font_extents;
948 XFontStruct **xfonts;
949 char **font_names;
950 m->dc.font.ascent = m->dc.font.descent = 0;
951 font_extents = XExtentsOfFontSet(m->dc.font.set);
952 n = XFontsOfFontSet(m->dc.font.set, &xfonts, &font_names);
953 for(i = 0, m->dc.font.ascent = 0, m->dc.font.descent = 0; i < n; i++) {
954 if(m->dc.font.ascent < (*xfonts)->ascent)
955 m->dc.font.ascent = (*xfonts)->ascent;
956 if(m->dc.font.descent < (*xfonts)->descent)
957 m->dc.font.descent = (*xfonts)->descent;
958 xfonts++;
959 }
960 }
961 else {
962 if(m->dc.font.xfont)
963 XFreeFont(dpy, m->dc.font.xfont);
964 m->dc.font.xfont = NULL;
965 if(!(m->dc.font.xfont = XLoadQueryFont(dpy, fontstr))
966 && !(m->dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
967 eprint("error, cannot load font: '%s'\n", fontstr);
968 m->dc.font.ascent = m->dc.font.xfont->ascent;
969 m->dc.font.descent = m->dc.font.xfont->descent;
970 }
971 m->dc.font.height = m->dc.font.ascent + m->dc.font.descent;
972}
973
974Bool
975isoccupied(Monitor *m, unsigned int t) {
976 Client *c;
977
978 for(c = clients; c; c = c->next)
979 if(c->tags[t] && c->monitor == selmonitor)
980 return True;
981 return False;
982}
983
984Bool
985isprotodel(Client *c) {
986 int i, n;
987 Atom *protocols;
988 Bool ret = False;
989
990 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
991 for(i = 0; !ret && i < n; i++)
992 if(protocols[i] == wmatom[WMDelete])
993 ret = True;
994 XFree(protocols);
995 }
996 return ret;
997}
998
999Bool
1000isurgent(int monitor, unsigned int t) {
1001 Client *c;
1002
1003 for(c = clients; c; c = c->next)
1004 if(c->monitor == monitor && c->isurgent && c->tags[t])
1005 return True;
1006 return False;
1007}
1008
1009Bool
1010isvisible(Client *c, int monitor) {
1011 unsigned int i;
1012
1013 for(i = 0; i < LENGTH(tags); i++)
1014 if(c->tags[i] && monitors[c->monitor].seltags[i] && c->monitor == monitor)
1015 return True;
1016 return False;
1017}
1018
1019void
1020keypress(XEvent *e) {
1021 unsigned int i;
1022 KeySym keysym;
1023 XKeyEvent *ev;
1024
1025 ev = &e->xkey;
1026 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1027 for(i = 0; i < LENGTH(keys); i++)
1028 if(keysym == keys[i].keysym
1029 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1030 {
1031 if(keys[i].func)
1032 keys[i].func(keys[i].arg);
1033 }
1034}
1035
1036void
1037killclient(const char *arg) {
1038 XEvent ev;
1039
1040 if(!sel)
1041 return;
1042 if(isprotodel(sel)) {
1043 ev.type = ClientMessage;
1044 ev.xclient.window = sel->win;
1045 ev.xclient.message_type = wmatom[WMProtocols];
1046 ev.xclient.format = 32;
1047 ev.xclient.data.l[0] = wmatom[WMDelete];
1048 ev.xclient.data.l[1] = CurrentTime;
1049 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1050 }
1051 else
1052 XKillClient(dpy, sel->win);
1053}
1054
1055void
1056manage(Window w, XWindowAttributes *wa) {
1057 Client *c, *t = NULL;
1058 Monitor *m;
1059 Status rettrans;
1060 Window trans;
1061 XWindowChanges wc;
1062
1063 c = emallocz(sizeof(Client));
1064 c->tags = emallocz(sizeof initags);
1065 c->win = w;
1066
1067 applyrules(c);
1068
1069 m = &monitors[c->monitor];
1070
1071 c->x = wa->x + m->sx;
1072 c->y = wa->y + m->sy;
1073 c->w = wa->width;
1074 c->h = wa->height;
1075 c->oldborder = wa->border_width;
1076
1077 if(c->w == m->sw && c->h == m->sh) {
1078 c->x = m->sx;
1079 c->y = m->sy;
1080 c->border = wa->border_width;
1081 }
1082 else {
1083 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1084 c->x = m->wax + m->waw - c->w - 2 * c->border;
1085 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1086 c->y = m->way + m->wah - c->h - 2 * c->border;
1087 if(c->x < m->wax)
1088 c->x = m->wax;
1089 if(c->y < m->way)
1090 c->y = m->way;
1091 c->border = BORDERPX;
1092 }
1093 wc.border_width = c->border;
1094 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1095 XSetWindowBorder(dpy, w, m->dc.norm[ColBorder]);
1096 configure(c); /* propagates border_width, if size doesn't change */
1097 updatesizehints(c);
1098 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1099 grabbuttons(c, False);
1100 updatetitle(c);
1101 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1102 for(t = clients; t && t->win != trans; t = t->next);
1103 if(t)
1104 memcpy(c->tags, t->tags, sizeof initags);
1105 if(!c->isfloating)
1106 c->isfloating = (rettrans == Success) || c->isfixed;
1107 attach(c);
1108 attachstack(c);
1109 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1110 ban(c);
1111 XMapWindow(dpy, c->win);
1112 setclientstate(c, NormalState);
1113 arrange();
1114}
1115
1116void
1117mappingnotify(XEvent *e) {
1118 XMappingEvent *ev = &e->xmapping;
1119
1120 XRefreshKeyboardMapping(ev);
1121 if(ev->request == MappingKeyboard)
1122 grabkeys();
1123}
1124
1125void
1126maprequest(XEvent *e) {
1127 static XWindowAttributes wa;
1128 XMapRequestEvent *ev = &e->xmaprequest;
1129
1130 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1131 return;
1132 if(wa.override_redirect)
1133 return;
1134 if(!getclient(ev->window))
1135 manage(ev->window, &wa);
1136}
1137
1138int
1139monitorat() {
1140 int i, x, y;
1141 Window win;
1142 unsigned int mask;
1143
1144 XQueryPointer(dpy, monitors[selmonitor].root, &win, &win, &x, &y, &i, &i, &mask);
1145 for(i = 0; i < mcount; i++) {
1146 if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
1147 && (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
1148 return i;
1149 }
1150 }
1151 return 0;
1152}
1153
1154void
1155movemouse(Client *c) {
1156 int x1, y1, ocx, ocy, di, nx, ny;
1157 unsigned int dui;
1158 Window dummy;
1159 XEvent ev;
1160
1161 ocx = nx = c->x;
1162 ocy = ny = c->y;
1163 if(XGrabPointer(dpy, monitors[selmonitor].root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1164 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1165 return;
1166 XQueryPointer(dpy, monitors[selmonitor].root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1167 for(;;) {
1168 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1169 switch (ev.type) {
1170 case ButtonRelease:
1171 XUngrabPointer(dpy, CurrentTime);
1172 return;
1173 case ConfigureRequest:
1174 case Expose:
1175 case MapRequest:
1176 handler[ev.type](&ev);
1177 break;
1178 case MotionNotify:
1179 XSync(dpy, False);
1180 nx = ocx + (ev.xmotion.x - x1);
1181 ny = ocy + (ev.xmotion.y - y1);
1182 Monitor *m = &monitors[monitorat()];
1183 if(abs(m->wax - nx) < SNAP)
1184 nx = m->wax;
1185 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1186 nx = m->wax + m->waw - c->w - 2 * c->border;
1187 if(abs(m->way - ny) < SNAP)
1188 ny = m->way;
1189 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1190 ny = m->way + m->wah - c->h - 2 * c->border;
1191 if((monitors[selmonitor].layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1192 togglefloating(NULL);
1193 if((monitors[selmonitor].layout->arrange == floating) || c->isfloating)
1194 resize(c, nx, ny, c->w, c->h, False);
1195 memcpy(c->tags, monitors[monitorat()].seltags, sizeof initags);
1196 break;
1197 }
1198 }
1199}
1200
1201Client *
1202nexttiled(Client *c, int monitor) {
1203 for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
1204 return c;
1205}
1206
1207void
1208propertynotify(XEvent *e) {
1209 Client *c;
1210 Window trans;
1211 XPropertyEvent *ev = &e->xproperty;
1212
1213 if(ev->state == PropertyDelete)
1214 return; /* ignore */
1215 if((c = getclient(ev->window))) {
1216 switch (ev->atom) {
1217 default: break;
1218 case XA_WM_TRANSIENT_FOR:
1219 XGetTransientForHint(dpy, c->win, &trans);
1220 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1221 arrange();
1222 break;
1223 case XA_WM_NORMAL_HINTS:
1224 updatesizehints(c);
1225 break;
1226 case XA_WM_HINTS:
1227 updatewmhints(c);
1228 drawbar();
1229 break;
1230 }
1231 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1232 updatetitle(c);
1233 if(c == sel)
1234 drawbar();
1235 }
1236 }
1237}
1238
1239void
1240quit(const char *arg) {
1241 readin = running = False;
1242}
1243
1244void
1245reapply(const char *arg) {
1246 static Bool zerotags[LENGTH(tags)] = { 0 };
1247 Client *c;
1248
1249 for(c = clients; c; c = c->next) {
1250 memcpy(c->tags, zerotags, sizeof zerotags);
1251 applyrules(c);
1252 }
1253 arrange();
1254}
1255
1256void
1257resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1258 XWindowChanges wc;
1259 //Monitor scr = monitors[monitorat()];
1260// c->monitor = monitorat();
1261
1262 if(sizehints) {
1263 /* set minimum possible */
1264 if (w < 1)
1265 w = 1;
1266 if (h < 1)
1267 h = 1;
1268
1269 /* temporarily remove base dimensions */
1270 w -= c->basew;
1271 h -= c->baseh;
1272
1273 /* adjust for aspect limits */
1274 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1275 if (w * c->maxay > h * c->maxax)
1276 w = h * c->maxax / c->maxay;
1277 else if (w * c->minay < h * c->minax)
1278 h = w * c->minay / c->minax;
1279 }
1280
1281 /* adjust for increment value */
1282 if(c->incw)
1283 w -= w % c->incw;
1284 if(c->inch)
1285 h -= h % c->inch;
1286
1287 /* restore base dimensions */
1288 w += c->basew;
1289 h += c->baseh;
1290
1291 if(c->minw > 0 && w < c->minw)
1292 w = c->minw;
1293 if(c->minh > 0 && h < c->minh)
1294 h = c->minh;
1295 if(c->maxw > 0 && w > c->maxw)
1296 w = c->maxw;
1297 if(c->maxh > 0 && h > c->maxh)
1298 h = c->maxh;
1299 }
1300 if(w <= 0 || h <= 0)
1301 return;
1302 /* TODO: offscreen appearance fixes */
1303 /*
1304 if(x > scr.sw)
1305 x = scr.sw - w - 2 * c->border;
1306 if(y > scr.sh)
1307 y = scr.sh - h - 2 * c->border;
1308 if(x + w + 2 * c->border < scr.sx)
1309 x = scr.sx;
1310 if(y + h + 2 * c->border < scr.sy)
1311 y = scr.sy;
1312 */
1313 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1314 c->x = wc.x = x;
1315 c->y = wc.y = y;
1316 c->w = wc.width = w;
1317 c->h = wc.height = h;
1318 wc.border_width = c->border;
1319 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1320 configure(c);
1321 XSync(dpy, False);
1322 }
1323}
1324
1325void
1326resizemouse(Client *c) {
1327 int ocx, ocy;
1328 int nw, nh;
1329 XEvent ev;
1330
1331 ocx = c->x;
1332 ocy = c->y;
1333 if(XGrabPointer(dpy, monitors[selmonitor].root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1334 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1335 return;
1336 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1337 for(;;) {
1338 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1339 switch(ev.type) {
1340 case ButtonRelease:
1341 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1342 c->w + c->border - 1, c->h + c->border - 1);
1343 XUngrabPointer(dpy, CurrentTime);
1344 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1345 return;
1346 case ConfigureRequest:
1347 case Expose:
1348 case MapRequest:
1349 handler[ev.type](&ev);
1350 break;
1351 case MotionNotify:
1352 XSync(dpy, False);
1353 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1354 nw = 1;
1355 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1356 nh = 1;
1357 if((monitors[selmonitor].layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1358 togglefloating(NULL);
1359 if((monitors[selmonitor].layout->arrange == floating) || c->isfloating)
1360 resize(c, c->x, c->y, nw, nh, True);
1361 break;
1362 }
1363 }
1364}
1365
1366void
1367restack(void) {
1368 unsigned int i;
1369 Client *c;
1370 XEvent ev;
1371 XWindowChanges wc;
1372
1373 drawbar();
1374 if(!sel)
1375 return;
1376 if(sel->isfloating || (monitors[selmonitor].layout->arrange == floating))
1377 XRaiseWindow(dpy, sel->win);
1378 if(monitors[selmonitor].layout->arrange != floating) {
1379 wc.stack_mode = Below;
1380 wc.sibling = monitors[selmonitor].barwin;
1381 if(!sel->isfloating) {
1382 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1383 wc.sibling = sel->win;
1384 }
1385 for(i = 0; i < mcount; i++) {
1386 for(c = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
1387 if(c == sel)
1388 continue;
1389 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1390 wc.sibling = c->win;
1391 }
1392 }
1393 }
1394 XSync(dpy, False);
1395 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1396}
1397
1398void
1399run(void) {
1400 char *p;
1401 char buf[sizeof stext];
1402 fd_set rd;
1403 int r, xfd;
1404 unsigned int len, offset;
1405 XEvent ev;
1406
1407 /* main event loop, also reads status text from stdin */
1408 XSync(dpy, False);
1409 xfd = ConnectionNumber(dpy);
1410 readin = True;
1411 offset = 0;
1412 len = sizeof stext - 1;
1413 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1414 while(running) {
1415 FD_ZERO(&rd);
1416 if(readin)
1417 FD_SET(STDIN_FILENO, &rd);
1418 FD_SET(xfd, &rd);
1419 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1420 if(errno == EINTR)
1421 continue;
1422 eprint("select failed\n");
1423 }
1424 if(FD_ISSET(STDIN_FILENO, &rd)) {
1425 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1426 case -1:
1427 strncpy(stext, strerror(errno), len);
1428 readin = False;
1429 break;
1430 case 0:
1431 strncpy(stext, "EOF", 4);
1432 readin = False;
1433 break;
1434 default:
1435 for(p = buf + offset; r > 0; p++, r--, offset++)
1436 if(*p == '\n' || *p == '\0') {
1437 *p = '\0';
1438 strncpy(stext, buf, len);
1439 p += r - 1; /* p is buf + offset + r - 1 */
1440 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1441 offset = r;
1442 if(r)
1443 memmove(buf, p - r + 1, r);
1444 break;
1445 }
1446 break;
1447 }
1448 drawbar();
1449 }
1450 while(XPending(dpy)) {
1451 XNextEvent(dpy, &ev);
1452 if(handler[ev.type])
1453 (handler[ev.type])(&ev); /* call handler */
1454 }
1455 }
1456}
1457
1458void
1459scan(void) {
1460 unsigned int i, j, num;
1461 Window *wins, d1, d2;
1462 XWindowAttributes wa;
1463
1464 for(i = 0; i < mcount; i++) {
1465 Monitor *m = &monitors[i];
1466 wins = NULL;
1467 if(XQueryTree(dpy, m->root, &d1, &d2, &wins, &num)) {
1468 for(j = 0; j < num; j++) {
1469 if(!XGetWindowAttributes(dpy, wins[j], &wa)
1470 || wa.override_redirect || XGetTransientForHint(dpy, wins[j], &d1))
1471 continue;
1472 if(wa.map_state == IsViewable || getstate(wins[j]) == IconicState)
1473 manage(wins[j], &wa);
1474 }
1475 for(j = 0; j < num; j++) { /* now the transients */
1476 if(!XGetWindowAttributes(dpy, wins[j], &wa))
1477 continue;
1478 if(XGetTransientForHint(dpy, wins[j], &d1)
1479 && (wa.map_state == IsViewable || getstate(wins[j]) == IconicState))
1480 manage(wins[j], &wa);
1481 }
1482 }
1483 if(wins)
1484 XFree(wins);
1485 }
1486}
1487
1488void
1489setclientstate(Client *c, long state) {
1490 long data[] = {state, None};
1491
1492 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1493 PropModeReplace, (unsigned char *)data, 2);
1494}
1495
1496void
1497setlayout(const char *arg) {
1498 unsigned int i;
1499 Monitor *m = &monitors[monitorat()];
1500
1501 if(!arg) {
1502 m->layout++;
1503 if(m->layout == &layouts[LENGTH(layouts)])
1504 m->layout = &layouts[0];
1505 }
1506 else {
1507 for(i = 0; i < LENGTH(layouts); i++)
1508 if(!strcmp(arg, layouts[i].symbol))
1509 break;
1510 if(i == LENGTH(layouts))
1511 return;
1512 m->layout = &layouts[i];
1513 }
1514 if(sel)
1515 arrange();
1516 else
1517 drawbar();
1518}
1519
1520void
1521setmwfact(const char *arg) {
1522 double delta;
1523
1524 Monitor *m = &monitors[monitorat()];
1525
1526 if(!domwfact)
1527 return;
1528 /* arg handling, manipulate mwfact */
1529 if(arg == NULL)
1530 m->mwfact = MWFACT;
1531 else if(sscanf(arg, "%lf", &delta) == 1) {
1532 if(arg[0] == '+' || arg[0] == '-')
1533 m->mwfact += delta;
1534 else
1535 m->mwfact = delta;
1536 if(m->mwfact < 0.1)
1537 m->mwfact = 0.1;
1538 else if(m->mwfact > 0.9)
1539 m->mwfact = 0.9;
1540 }
1541 arrange();
1542}
1543
1544void
1545setup(void) {
1546 unsigned int i, j, k;
1547 Monitor *m;
1548 XSetWindowAttributes wa;
1549 XineramaScreenInfo *info = NULL;
1550
1551 /* init atoms */
1552 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1553 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1554 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1555 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1556 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1557 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1558
1559 /* init cursors */
1560 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1561 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1562 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1563
1564 // init screens/monitors first
1565 mcount = 1;
1566 if((isxinerama = XineramaIsActive(dpy)))
1567 info = XineramaQueryScreens(dpy, &mcount);
1568 monitors = emallocz(mcount * sizeof(Monitor));
1569
1570 for(i = 0; i < mcount; i++) {
1571 /* init geometry */
1572 m = &monitors[i];
1573
1574 m->screen = isxinerama ? 0 : i;
1575 m->root = RootWindow(dpy, m->screen);
1576
1577 if (mcount != 1 && isxinerama) {
1578 m->sx = info[i].x_org;
1579 m->sy = info[i].y_org;
1580 m->sw = info[i].width;
1581 m->sh = info[i].height;
1582 fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
1583 }
1584 else {
1585 m->sx = 0;
1586 m->sy = 0;
1587 m->sw = DisplayWidth(dpy, m->screen);
1588 m->sh = DisplayHeight(dpy, m->screen);
1589 }
1590
1591 m->seltags = emallocz(sizeof initags);
1592 m->prevtags = emallocz(sizeof initags);
1593
1594 memcpy(m->seltags, initags, sizeof initags);
1595 memcpy(m->prevtags, initags, sizeof initags);
1596
1597 /* init appearance */
1598 m->dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR, m->screen);
1599 m->dc.norm[ColBG] = getcolor(NORMBGCOLOR, m->screen);
1600 m->dc.norm[ColFG] = getcolor(NORMFGCOLOR, m->screen);
1601 m->dc.sel[ColBorder] = getcolor(SELBORDERCOLOR, m->screen);
1602 m->dc.sel[ColBG] = getcolor(SELBGCOLOR, m->screen);
1603 m->dc.sel[ColFG] = getcolor(SELFGCOLOR, m->screen);
1604 initfont(m, FONT);
1605 m->dc.h = bh = m->dc.font.height + 2;
1606
1607 /* init layouts */
1608 m->mwfact = MWFACT;
1609 m->layout = &layouts[0];
1610 for(blw = k = 0; k < LENGTH(layouts); k++) {
1611 j = textw(m, layouts[k].symbol);
1612 if(j > blw)
1613 blw = j;
1614 }
1615
1616 // TODO: bpos per screen?
1617 bpos = BARPOS;
1618 wa.override_redirect = 1;
1619 wa.background_pixmap = ParentRelative;
1620 wa.event_mask = ButtonPressMask | ExposureMask;
1621
1622 /* init bars */
1623 m->barwin = XCreateWindow(dpy, m->root, m->sx, m->sy, m->sw, bh, 0,
1624 DefaultDepth(dpy, m->screen), CopyFromParent, DefaultVisual(dpy, m->screen),
1625 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1626 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1627 updatebarpos(m);
1628 XMapRaised(dpy, m->barwin);
1629 strcpy(stext, "dwm-"VERSION);
1630 m->dc.drawable = XCreatePixmap(dpy, m->root, m->sw, bh, DefaultDepth(dpy, m->screen));
1631 m->dc.gc = XCreateGC(dpy, m->root, 0, 0);
1632 XSetLineAttributes(dpy, m->dc.gc, 1, LineSolid, CapButt, JoinMiter);
1633 if(!m->dc.font.set)
1634 XSetFont(dpy, m->dc.gc, m->dc.font.xfont->fid);
1635
1636 /* EWMH support per monitor */
1637 XChangeProperty(dpy, m->root, netatom[NetSupported], XA_ATOM, 32,
1638 PropModeReplace, (unsigned char *) netatom, NetLast);
1639
1640 /* select for events */
1641 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1642 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1643 XChangeWindowAttributes(dpy, m->root, CWEventMask | CWCursor, &wa);
1644 XSelectInput(dpy, m->root, wa.event_mask);
1645 }
1646 if(info)
1647 XFree(info);
1648
1649 /* grab keys */
1650 grabkeys();
1651
1652 /* init tags */
1653 compileregs();
1654
1655 selmonitor = monitorat();
1656 fprintf(stderr, "selmonitor == %d\n", selmonitor);
1657}
1658
1659void
1660spawn(const char *arg) {
1661 static char *shell = NULL;
1662
1663 if(!shell && !(shell = getenv("SHELL")))
1664 shell = "/bin/sh";
1665 if(!arg)
1666 return;
1667 /* The double-fork construct avoids zombie processes and keeps the code
1668 * clean from stupid signal handlers. */
1669 if(fork() == 0) {
1670 if(fork() == 0) {
1671 if(dpy)
1672 close(ConnectionNumber(dpy));
1673 setsid();
1674 execl(shell, shell, "-c", arg, (char *)NULL);
1675 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1676 perror(" failed");
1677 }
1678 exit(0);
1679 }
1680 wait(0);
1681}
1682
1683void
1684tag(const char *arg) {
1685 unsigned int i;
1686
1687 if(!sel)
1688 return;
1689 for(i = 0; i < LENGTH(tags); i++)
1690 sel->tags[i] = (NULL == arg);
1691 sel->tags[idxoftag(arg)] = True;
1692 arrange();
1693}
1694
1695unsigned int
1696textnw(Monitor *m, const char *text, unsigned int len) {
1697 XRectangle r;
1698
1699 if(m->dc.font.set) {
1700 XmbTextExtents(m->dc.font.set, text, len, NULL, &r);
1701 return r.width;
1702 }
1703 return XTextWidth(m->dc.font.xfont, text, len);
1704}
1705
1706unsigned int
1707textw(Monitor *m, const char *text) {
1708 return textnw(m, text, strlen(text)) + m->dc.font.height;
1709}
1710
1711void
1712tile(void) {
1713 unsigned int i, j, n, nx, ny, nw, nh, mw, th;
1714 Client *c, *mc;
1715
1716 domwfact = dozoom = True;
1717
1718 nx = ny = nw = 0; /* gcc stupidity requires this */
1719
1720 for (i = 0; i < mcount; i++) {
1721 Monitor *m = &monitors[i];
1722
1723 for(n = 0, c = nexttiled(clients, i); c; c = nexttiled(c->next, i))
1724 n++;
1725
1726 /* window geoms */
1727 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1728 th = (n > 1) ? m->wah / (n - 1) : 0;
1729 if(n > 1 && th < bh)
1730 th = m->wah;
1731
1732 for(j = 0, c = mc = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
1733 if(j == 0) { /* master */
1734 nx = m->wax;
1735 ny = m->way;
1736 nw = mw - 2 * c->border;
1737 nh = m->wah - 2 * c->border;
1738 }
1739 else { /* tile window */
1740 if(j == 1) {
1741 ny = m->way;
1742 nx += mc->w + 2 * mc->border;
1743 nw = m->waw - mw - 2 * c->border;
1744 }
1745 if(j + 1 == n) /* remainder */
1746 nh = (m->way + m->wah) - ny - 2 * c->border;
1747 else
1748 nh = th - 2 * c->border;
1749 }
1750 fprintf(stderr, "tile(%d, %d, %d, %d)\n", nx, ny, nw, nh);
1751 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1752 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1753 /* client doesn't accept size constraints */
1754 resize(c, nx, ny, nw, nh, False);
1755 if(n > 1 && th != m->wah)
1756 ny = c->y + c->h + 2 * c->border;
1757
1758 j++;
1759 }
1760 }
1761 fprintf(stderr, "done\n");
1762}
1763void
1764togglebar(const char *arg) {
1765 if(bpos == BarOff)
1766 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1767 else
1768 bpos = BarOff;
1769 updatebarpos(&monitors[monitorat()]);
1770 arrange();
1771}
1772
1773void
1774togglefloating(const char *arg) {
1775 if(!sel)
1776 return;
1777 sel->isfloating = !sel->isfloating;
1778 if(sel->isfloating)
1779 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1780 arrange();
1781}
1782
1783void
1784toggletag(const char *arg) {
1785 unsigned int i, j;
1786
1787 if(!sel)
1788 return;
1789 i = idxoftag(arg);
1790 sel->tags[i] = !sel->tags[i];
1791 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1792 if(j == LENGTH(tags))
1793 sel->tags[i] = True; /* at least one tag must be enabled */
1794 arrange();
1795}
1796
1797void
1798toggleview(const char *arg) {
1799 unsigned int i, j;
1800
1801 Monitor *m = &monitors[monitorat()];
1802
1803 i = idxoftag(arg);
1804 m->seltags[i] = !m->seltags[i];
1805 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1806 if(j == LENGTH(tags))
1807 m->seltags[i] = True; /* at least one tag must be viewed */
1808 arrange();
1809}
1810
1811void
1812unban(Client *c) {
1813 if(!c->isbanned)
1814 return;
1815 XMoveWindow(dpy, c->win, c->x, c->y);
1816 c->isbanned = False;
1817}
1818
1819void
1820unmanage(Client *c) {
1821 XWindowChanges wc;
1822
1823 wc.border_width = c->oldborder;
1824 /* The server grab construct avoids race conditions. */
1825 XGrabServer(dpy);
1826 XSetErrorHandler(xerrordummy);
1827 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1828 detach(c);
1829 detachstack(c);
1830 if(sel == c)
1831 focus(NULL);
1832 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1833 setclientstate(c, WithdrawnState);
1834 free(c->tags);
1835 free(c);
1836 XSync(dpy, False);
1837 XSetErrorHandler(xerror);
1838 XUngrabServer(dpy);
1839 arrange();
1840}
1841
1842void
1843unmapnotify(XEvent *e) {
1844 Client *c;
1845 XUnmapEvent *ev = &e->xunmap;
1846
1847 if((c = getclient(ev->window)))
1848 unmanage(c);
1849}
1850
1851void
1852updatebarpos(Monitor *m) {
1853 XEvent ev;
1854
1855 m->wax = m->sx;
1856 m->way = m->sy;
1857 m->wah = m->sh;
1858 m->waw = m->sw;
1859 switch(bpos) {
1860 default:
1861 m->wah -= bh;
1862 m->way += bh;
1863 XMoveWindow(dpy, m->barwin, m->sx, m->sy);
1864 break;
1865 case BarBot:
1866 m->wah -= bh;
1867 XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
1868 break;
1869 case BarOff:
1870 XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
1871 break;
1872 }
1873 XSync(dpy, False);
1874 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1875}
1876
1877void
1878updatesizehints(Client *c) {
1879 long msize;
1880 XSizeHints size;
1881
1882 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1883 size.flags = PSize;
1884 c->flags = size.flags;
1885 if(c->flags & PBaseSize) {
1886 c->basew = size.base_width;
1887 c->baseh = size.base_height;
1888 }
1889 else if(c->flags & PMinSize) {
1890 c->basew = size.min_width;
1891 c->baseh = size.min_height;
1892 }
1893 else
1894 c->basew = c->baseh = 0;
1895 if(c->flags & PResizeInc) {
1896 c->incw = size.width_inc;
1897 c->inch = size.height_inc;
1898 }
1899 else
1900 c->incw = c->inch = 0;
1901 if(c->flags & PMaxSize) {
1902 c->maxw = size.max_width;
1903 c->maxh = size.max_height;
1904 }
1905 else
1906 c->maxw = c->maxh = 0;
1907 if(c->flags & PMinSize) {
1908 c->minw = size.min_width;
1909 c->minh = size.min_height;
1910 }
1911 else if(c->flags & PBaseSize) {
1912 c->minw = size.base_width;
1913 c->minh = size.base_height;
1914 }
1915 else
1916 c->minw = c->minh = 0;
1917 if(c->flags & PAspect) {
1918 c->minax = size.min_aspect.x;
1919 c->maxax = size.max_aspect.x;
1920 c->minay = size.min_aspect.y;
1921 c->maxay = size.max_aspect.y;
1922 }
1923 else
1924 c->minax = c->maxax = c->minay = c->maxay = 0;
1925 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1926 && c->maxw == c->minw && c->maxh == c->minh);
1927}
1928
1929void
1930updatetitle(Client *c) {
1931 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1932 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1933}
1934
1935void
1936updatewmhints(Client *c) {
1937 XWMHints *wmh;
1938
1939 if((wmh = XGetWMHints(dpy, c->win))) {
1940 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1941 XFree(wmh);
1942 }
1943}
1944
1945/* There's no way to check accesses to destroyed windows, thus those cases are
1946 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1947 * default error handler, which may call exit. */
1948int
1949xerror(Display *dpy, XErrorEvent *ee) {
1950 if(ee->error_code == BadWindow
1951 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1952 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1953 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1954 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1955 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1956 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1957 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1958 return 0;
1959 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1960 ee->request_code, ee->error_code);
1961 return xerrorxlib(dpy, ee); /* may call exit */
1962}
1963
1964int
1965xerrordummy(Display *dsply, XErrorEvent *ee) {
1966 return 0;
1967}
1968
1969/* Startup Error handler to check if another window manager
1970 * is already running. */
1971int
1972xerrorstart(Display *dsply, XErrorEvent *ee) {
1973 otherwm = True;
1974 return -1;
1975}
1976
1977void
1978view(const char *arg) {
1979 unsigned int i;
1980 Bool tmp[LENGTH(tags)];
1981 Monitor *m = &monitors[monitorat()];
1982
1983 for(i = 0; i < LENGTH(tags); i++)
1984 tmp[i] = (NULL == arg);
1985 tmp[idxoftag(arg)] = True;
1986 if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
1987 memcpy(m->prevtags, m->seltags, sizeof initags);
1988 memcpy(m->seltags, tmp, sizeof initags);
1989 arrange();
1990 }
1991}
1992
1993void
1994viewprevtag(const char *arg) {
1995 static Bool tmp[LENGTH(tags)];
1996
1997 Monitor *m = &monitors[monitorat()];
1998
1999 memcpy(tmp, m->seltags, sizeof initags);
2000 memcpy(m->seltags, m->prevtags, sizeof initags);
2001 memcpy(m->prevtags, tmp, sizeof initags);
2002 arrange();
2003}
2004
2005void
2006zoom(const char *arg) {
2007 Client *c;
2008
2009 if(!sel || !dozoom || sel->isfloating)
2010 return;
2011 if((c = sel) == nexttiled(clients, c->monitor))
2012 if(!(c = nexttiled(c->next, c->monitor)))
2013 return;
2014 detach(c);
2015 attach(c);
2016 focus(c);
2017 arrange();
2018}
2019
2020void
2021movetomonitor(const char *arg) {
2022 if (sel) {
2023 sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
2024
2025 memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
2026 resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
2027 arrange();
2028 }
2029}
2030
2031void
2032selectmonitor(const char *arg) {
2033 Monitor *m = &monitors[arg ? atoi(arg) : (monitorat()+1) % mcount];
2034
2035 XWarpPointer(dpy, None, m->root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2036 focus(NULL);
2037}
2038
2039
2040int
2041main(int argc, char *argv[]) {
2042 if(argc == 2 && !strcmp("-v", argv[1]))
2043 eprint("dwm-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, "
2044 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2045 else if(argc != 1)
2046 eprint("usage: dwm [-v]\n");
2047
2048 setlocale(LC_CTYPE, "");
2049 if(!(dpy = XOpenDisplay(0)))
2050 eprint("dwm: cannot open display\n");
2051
2052 checkotherwm();
2053 setup();
2054 drawbar();
2055 scan();
2056 run();
2057 cleanup();
2058
2059 XCloseDisplay(dpy);
2060 return 0;
2061}