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 barwin;
122 int sx, sy, sw, sh, wax, way, wah, waw;
123 DC dc;
124 Bool *seltags;
125 Bool *prevtags;
126 Layout *layout;
127 double mwfact;
128} Monitor;
129
130/* function declarations */
131void applyrules(Client *c);
132void arrange(void);
133void attach(Client *c);
134void attachstack(Client *c);
135void ban(Client *c);
136void buttonpress(XEvent *e);
137void checkotherwm(void);
138void cleanup(void);
139void compileregs(void);
140void configure(Client *c);
141void configurenotify(XEvent *e);
142void configurerequest(XEvent *e);
143void destroynotify(XEvent *e);
144void detach(Client *c);
145void detachstack(Client *c);
146void drawbar(void);
147void drawsquare(Monitor *, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
148void drawtext(Monitor *, const char *text, unsigned long col[ColLast], Bool invert);
149void *emallocz(unsigned int size);
150void enternotify(XEvent *e);
151void eprint(const char *errstr, ...);
152void expose(XEvent *e);
153void floating(void); /* default floating layout */
154void focus(Client *c);
155void focusin(XEvent *e);
156void focusnext(const char *arg);
157void focusprev(const char *arg);
158Client *getclient(Window w);
159unsigned long getcolor(const char *colstr, int screen);
160long getstate(Window w);
161Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
162void grabbuttons(Client *c, Bool focused);
163void grabkeys(void);
164unsigned int idxoftag(const char *tag);
165void initfont(Monitor*, const char *fontstr);
166Bool isoccupied(unsigned int monitor, unsigned int t);
167Bool isprotodel(Client *c);
168Bool isurgent(unsigned int monitor, unsigned int t);
169Bool isvisible(Client *c, int monitor);
170void keypress(XEvent *e);
171void killclient(const char *arg);
172void manage(Window w, XWindowAttributes *wa);
173void mappingnotify(XEvent *e);
174void maprequest(XEvent *e);
175void movemouse(Client *c);
176Client *nexttiled(Client *c, int monitor);
177void propertynotify(XEvent *e);
178void quit(const char *arg);
179void reapply(const char *arg);
180void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
181void resizemouse(Client *c);
182void restack(void);
183void run(void);
184void scan(void);
185void setclientstate(Client *c, long state);
186void setlayout(const char *arg);
187void setmwfact(const char *arg);
188void setup(void);
189void spawn(const char *arg);
190void tag(const char *arg);
191unsigned int textnw(Monitor*, const char *text, unsigned int len);
192unsigned int textw(Monitor*, const char *text);
193void tile(void);
194void togglebar(const char *arg);
195void togglefloating(const char *arg);
196void toggletag(const char *arg);
197void toggleview(const char *arg);
198void unban(Client *c);
199void unmanage(Client *c);
200void unmapnotify(XEvent *e);
201void updatebarpos(Monitor *m);
202void updatesizehints(Client *c);
203void updatetitle(Client *c);
204void updatewmhints(Client *c);
205void view(const char *arg);
206void viewprevtag(const char *arg); /* views previous selected tags */
207int xerror(Display *dpy, XErrorEvent *ee);
208int xerrordummy(Display *dsply, XErrorEvent *ee);
209int xerrorstart(Display *dsply, XErrorEvent *ee);
210void zoom(const char *arg);
211int monitorat(void);
212void movetomonitor(const char *arg);
213void selectmonitor(const char *arg);
214
215/* variables */
216char stext[256];
217int mcount = 1;
218int selmonitor = 0;
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;
251Window root;
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, 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 == 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, 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 Client *c;
566
567 for(i = 0; i < mcount; i++) {
568 Monitor *m = &monitors[i];
569 m->dc.x = 0;
570 for(c = stack; c && !isvisible(c, i); c = c->snext);
571 fprintf(stderr, "m%d %s\n", i, c ? c->name : "NIL");
572 for(j = 0; j < LENGTH(tags); j++) {
573 m->dc.w = textw(m, tags[j]);
574 if(m->seltags[j]) {
575 drawtext(m, tags[j], m->dc.sel, isurgent(i, j));
576 drawsquare(m, c && c->tags[j] && c->monitor == i,
577 isoccupied(i, j), isurgent(i, j), m->dc.sel);
578 }
579 else {
580 drawtext(m, tags[j], m->dc.norm, isurgent(i, j));
581 drawsquare(m, c && c->tags[j] && c->monitor == i,
582 isoccupied(i, j), isurgent(i, j), m->dc.norm);
583 }
584 m->dc.x += m->dc.w;
585 }
586 m->dc.w = blw;
587 drawtext(m, m->layout->symbol, m->dc.norm, False);
588 x = m->dc.x + m->dc.w;
589 if(i == selmonitor) {
590 m->dc.w = textw(m, stext);
591 m->dc.x = m->sw - m->dc.w;
592 if(m->dc.x < x) {
593 m->dc.x = x;
594 m->dc.w = m->sw - x;
595 }
596 drawtext(m, stext, m->dc.norm, False);
597 }
598 else
599 m->dc.x = m->sw;
600 if((m->dc.w = m->dc.x - x) > bh) {
601 m->dc.x = x;
602 if(c) {
603 drawtext(m, c->name, m->dc.sel, False);
604 drawsquare(m, False, c->isfloating, False, m->dc.sel);
605 }
606 else
607 drawtext(m, NULL, m->dc.norm, False);
608 }
609 XCopyArea(dpy, m->dc.drawable, m->barwin, m->dc.gc, 0, 0, m->sw, bh, 0, 0);
610 XSync(dpy, False);
611 }
612}
613
614void
615drawsquare(Monitor *m, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
616 int x;
617 XGCValues gcv;
618 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
619
620 gcv.foreground = col[invert ? ColBG : ColFG];
621 XChangeGC(dpy, m->dc.gc, GCForeground, &gcv);
622 x = (m->dc.font.ascent + m->dc.font.descent + 2) / 4;
623 r.x = m->dc.x + 1;
624 r.y = m->dc.y + 1;
625 if(filled) {
626 r.width = r.height = x + 1;
627 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
628 }
629 else if(empty) {
630 r.width = r.height = x;
631 XDrawRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
632 }
633}
634
635void
636drawtext(Monitor *m, const char *text, unsigned long col[ColLast], Bool invert) {
637 int x, y, w, h;
638 static char buf[256];
639 unsigned int len, olen;
640 XRectangle r = { m->dc.x, m->dc.y, m->dc.w, m->dc.h };
641
642 XSetForeground(dpy, m->dc.gc, col[invert ? ColFG : ColBG]);
643 XFillRectangles(dpy, m->dc.drawable, m->dc.gc, &r, 1);
644 if(!text)
645 return;
646 w = 0;
647 olen = len = strlen(text);
648 if(len >= sizeof buf)
649 len = sizeof buf - 1;
650 memcpy(buf, text, len);
651 buf[len] = 0;
652 h = m->dc.font.ascent + m->dc.font.descent;
653 y = m->dc.y + (m->dc.h / 2) - (h / 2) + m->dc.font.ascent;
654 x = m->dc.x + (h / 2);
655 /* shorten text if necessary */
656 while(len && (w = textnw(m, buf, len)) > m->dc.w - h)
657 buf[--len] = 0;
658 if(len < olen) {
659 if(len > 1)
660 buf[len - 1] = '.';
661 if(len > 2)
662 buf[len - 2] = '.';
663 if(len > 3)
664 buf[len - 3] = '.';
665 }
666 if(w > m->dc.w)
667 return; /* too long */
668 XSetForeground(dpy, m->dc.gc, col[invert ? ColBG : ColFG]);
669 if(m->dc.font.set)
670 XmbDrawString(dpy, m->dc.drawable, m->dc.font.set, m->dc.gc, x, y, buf, len);
671 else
672 XDrawString(dpy, m->dc.drawable, m->dc.gc, x, y, buf, len);
673}
674
675void *
676emallocz(unsigned int size) {
677 void *res = calloc(1, size);
678
679 if(!res)
680 eprint("fatal: could not malloc() %u bytes\n", size);
681 return res;
682}
683
684void
685enternotify(XEvent *e) {
686 Client *c;
687 XCrossingEvent *ev = &e->xcrossing;
688
689 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior) {
690 if(!isxinerama || ev->window != root)
691 return;
692 }
693 if((c = getclient(ev->window)))
694 focus(c);
695 else {
696 selmonitor = monitorat();
697 fprintf(stderr, "updating selmonitor %d\n", selmonitor);
698 focus(NULL);
699 }
700}
701
702void
703eprint(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
712void
713expose(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
722void
723floating(void) { /* default floating layout */
724 Client *c;
725
726 domwfact = dozoom = False;
727 for(c = clients; c; c = c->next)
728 if(isvisible(c, selmonitor))
729 resize(c, c->x, c->y, c->w, c->h, True);
730}
731
732void
733focus(Client *c) {
734 Monitor *m;
735
736 if(c)
737 selmonitor = c->monitor;
738 m = &monitors[selmonitor];
739 if(!c || (c && !isvisible(c, selmonitor)))
740 for(c = stack; c && !isvisible(c, c->monitor); c = c->snext);
741 if(sel && sel != c) {
742 grabbuttons(sel, False);
743 XSetWindowBorder(dpy, sel->win, monitors[sel->monitor].dc.norm[ColBorder]);
744 }
745 if(c) {
746 detachstack(c);
747 attachstack(c);
748 grabbuttons(c, True);
749 }
750 sel = c;
751 drawbar();
752 if(c) {
753 XSetWindowBorder(dpy, c->win, m->dc.sel[ColBorder]);
754 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
755 selmonitor = c->monitor;
756 }
757 else {
758 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
759 drawbar();
760 }
761}
762
763void
764focusin(XEvent *e) { /* there are some broken focus acquiring clients */
765 XFocusChangeEvent *ev = &e->xfocus;
766
767 if(sel && ev->window != sel->win)
768 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
769}
770
771void
772focusnext(const char *arg) {
773 Client *c;
774
775 if(!sel)
776 return;
777 for(c = sel->next; c && !isvisible(c, selmonitor); c = c->next);
778 if(!c)
779 for(c = clients; c && !isvisible(c, selmonitor); c = c->next);
780 if(c) {
781 focus(c);
782 restack();
783 }
784}
785
786void
787focusprev(const char *arg) {
788 Client *c;
789
790 if(!sel)
791 return;
792 for(c = sel->prev; c && !isvisible(c, selmonitor); c = c->prev);
793 if(!c) {
794 for(c = clients; c && c->next; c = c->next);
795 for(; c && !isvisible(c, selmonitor); c = c->prev);
796 }
797 if(c) {
798 focus(c);
799 restack();
800 }
801}
802
803Client *
804getclient(Window w) {
805 Client *c;
806
807 for(c = clients; c && c->win != w; c = c->next);
808 return c;
809}
810
811unsigned long
812getcolor(const char *colstr, int screen) {
813 Colormap cmap = DefaultColormap(dpy, screen);
814 XColor color;
815
816 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
817 eprint("error, cannot allocate color '%s'\n", colstr);
818 return color.pixel;
819}
820
821long
822getstate(Window w) {
823 int format, status;
824 long result = -1;
825 unsigned char *p = NULL;
826 unsigned long n, extra;
827 Atom real;
828
829 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
830 &real, &format, &n, &extra, (unsigned char **)&p);
831 if(status != Success)
832 return -1;
833 if(n != 0)
834 result = *p;
835 XFree(p);
836 return result;
837}
838
839Bool
840gettextprop(Window w, Atom atom, char *text, unsigned int size) {
841 char **list = NULL;
842 int n;
843 XTextProperty name;
844
845 if(!text || size == 0)
846 return False;
847 text[0] = '\0';
848 XGetTextProperty(dpy, w, &name, atom);
849 if(!name.nitems)
850 return False;
851 if(name.encoding == XA_STRING)
852 strncpy(text, (char *)name.value, size - 1);
853 else {
854 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
855 && n > 0 && *list) {
856 strncpy(text, *list, size - 1);
857 XFreeStringList(list);
858 }
859 }
860 text[size - 1] = '\0';
861 XFree(name.value);
862 return True;
863}
864
865void
866grabbuttons(Client *c, Bool focused) {
867 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
868
869 if(focused) {
870 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
871 GrabModeAsync, GrabModeSync, None, None);
872 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
873 GrabModeAsync, GrabModeSync, None, None);
874 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
875 GrabModeAsync, GrabModeSync, None, None);
876 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
877 GrabModeAsync, GrabModeSync, None, None);
878
879 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
880 GrabModeAsync, GrabModeSync, None, None);
881 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
882 GrabModeAsync, GrabModeSync, None, None);
883 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
884 GrabModeAsync, GrabModeSync, None, None);
885 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
886 GrabModeAsync, GrabModeSync, None, None);
887
888 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
889 GrabModeAsync, GrabModeSync, None, None);
890 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
891 GrabModeAsync, GrabModeSync, None, None);
892 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
893 GrabModeAsync, GrabModeSync, None, None);
894 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
895 GrabModeAsync, GrabModeSync, None, None);
896 }
897 else
898 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
899 GrabModeAsync, GrabModeSync, None, None);
900}
901
902void
903grabkeys(void) {
904 unsigned int i, j;
905 KeyCode code;
906 XModifierKeymap *modmap;
907
908 /* init modifier map */
909 modmap = XGetModifierMapping(dpy);
910 for(i = 0; i < 8; i++)
911 for(j = 0; j < modmap->max_keypermod; j++) {
912 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
913 numlockmask = (1 << i);
914 }
915 XFreeModifiermap(modmap);
916
917 XUngrabKey(dpy, AnyKey, AnyModifier, root);
918 for(i = 0; i < LENGTH(keys); i++) {
919 code = XKeysymToKeycode(dpy, keys[i].keysym);
920 XGrabKey(dpy, code, keys[i].mod, root, True,
921 GrabModeAsync, GrabModeAsync);
922 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
923 GrabModeAsync, GrabModeAsync);
924 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
925 GrabModeAsync, GrabModeAsync);
926 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
927 GrabModeAsync, GrabModeAsync);
928 }
929}
930
931unsigned int
932idxoftag(const char *tag) {
933 unsigned int i;
934
935 for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
936 return (i < LENGTH(tags)) ? i : 0;
937}
938
939void
940initfont(Monitor *m, const char *fontstr) {
941 char *def, **missing;
942 int i, n;
943
944 missing = NULL;
945 if(m->dc.font.set)
946 XFreeFontSet(dpy, m->dc.font.set);
947 m->dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
948 if(missing) {
949 while(n--)
950 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
951 XFreeStringList(missing);
952 }
953 if(m->dc.font.set) {
954 XFontSetExtents *font_extents;
955 XFontStruct **xfonts;
956 char **font_names;
957 m->dc.font.ascent = m->dc.font.descent = 0;
958 font_extents = XExtentsOfFontSet(m->dc.font.set);
959 n = XFontsOfFontSet(m->dc.font.set, &xfonts, &font_names);
960 for(i = 0, m->dc.font.ascent = 0, m->dc.font.descent = 0; i < n; i++) {
961 if(m->dc.font.ascent < (*xfonts)->ascent)
962 m->dc.font.ascent = (*xfonts)->ascent;
963 if(m->dc.font.descent < (*xfonts)->descent)
964 m->dc.font.descent = (*xfonts)->descent;
965 xfonts++;
966 }
967 }
968 else {
969 if(m->dc.font.xfont)
970 XFreeFont(dpy, m->dc.font.xfont);
971 m->dc.font.xfont = NULL;
972 if(!(m->dc.font.xfont = XLoadQueryFont(dpy, fontstr))
973 && !(m->dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
974 eprint("error, cannot load font: '%s'\n", fontstr);
975 m->dc.font.ascent = m->dc.font.xfont->ascent;
976 m->dc.font.descent = m->dc.font.xfont->descent;
977 }
978 m->dc.font.height = m->dc.font.ascent + m->dc.font.descent;
979}
980
981Bool
982isoccupied(unsigned int monitor, unsigned int t) {
983 Client *c;
984
985 for(c = clients; c; c = c->next)
986 if(c->tags[t] && c->monitor == monitor)
987 return True;
988 return False;
989}
990
991Bool
992isprotodel(Client *c) {
993 int i, n;
994 Atom *protocols;
995 Bool ret = False;
996
997 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
998 for(i = 0; !ret && i < n; i++)
999 if(protocols[i] == wmatom[WMDelete])
1000 ret = True;
1001 XFree(protocols);
1002 }
1003 return ret;
1004}
1005
1006Bool
1007isurgent(unsigned int monitor, unsigned int t) {
1008 Client *c;
1009
1010 for(c = clients; c; c = c->next)
1011 if(c->monitor == monitor && c->isurgent && c->tags[t])
1012 return True;
1013 return False;
1014}
1015
1016Bool
1017isvisible(Client *c, int monitor) {
1018 unsigned int i;
1019
1020 if(c->monitor != monitor)
1021 return False;
1022 for(i = 0; i < LENGTH(tags); i++)
1023 if(c->tags[i] && monitors[c->monitor].seltags[i])
1024 return True;
1025 return False;
1026}
1027
1028void
1029keypress(XEvent *e) {
1030 unsigned int i;
1031 KeySym keysym;
1032 XKeyEvent *ev;
1033
1034 ev = &e->xkey;
1035 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1036 for(i = 0; i < LENGTH(keys); i++)
1037 if(keysym == keys[i].keysym
1038 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1039 {
1040 if(keys[i].func)
1041 keys[i].func(keys[i].arg);
1042 }
1043}
1044
1045void
1046killclient(const char *arg) {
1047 XEvent ev;
1048
1049 if(!sel)
1050 return;
1051 if(isprotodel(sel)) {
1052 ev.type = ClientMessage;
1053 ev.xclient.window = sel->win;
1054 ev.xclient.message_type = wmatom[WMProtocols];
1055 ev.xclient.format = 32;
1056 ev.xclient.data.l[0] = wmatom[WMDelete];
1057 ev.xclient.data.l[1] = CurrentTime;
1058 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1059 }
1060 else
1061 XKillClient(dpy, sel->win);
1062}
1063
1064void
1065manage(Window w, XWindowAttributes *wa) {
1066 Client *c, *t = NULL;
1067 Monitor *m;
1068 Status rettrans;
1069 Window trans;
1070 XWindowChanges wc;
1071
1072 c = emallocz(sizeof(Client));
1073 c->tags = emallocz(sizeof initags);
1074 c->win = w;
1075
1076 applyrules(c);
1077
1078 m = &monitors[c->monitor];
1079
1080 c->x = wa->x + m->sx;
1081 c->y = wa->y + m->sy;
1082 c->w = wa->width;
1083 c->h = wa->height;
1084 c->oldborder = wa->border_width;
1085
1086 if(c->w == m->sw && c->h == m->sh) {
1087 c->x = m->sx;
1088 c->y = m->sy;
1089 c->border = wa->border_width;
1090 }
1091 else {
1092 if(c->x + c->w + 2 * c->border > m->wax + m->waw)
1093 c->x = m->wax + m->waw - c->w - 2 * c->border;
1094 if(c->y + c->h + 2 * c->border > m->way + m->wah)
1095 c->y = m->way + m->wah - c->h - 2 * c->border;
1096 if(c->x < m->wax)
1097 c->x = m->wax;
1098 if(c->y < m->way)
1099 c->y = m->way;
1100 c->border = BORDERPX;
1101 }
1102 wc.border_width = c->border;
1103 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1104 XSetWindowBorder(dpy, w, m->dc.norm[ColBorder]);
1105 configure(c); /* propagates border_width, if size doesn't change */
1106 updatesizehints(c);
1107 XSelectInput(dpy, w, EnterWindowMask | FocusChangeMask | PropertyChangeMask | StructureNotifyMask);
1108 grabbuttons(c, False);
1109 updatetitle(c);
1110 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1111 for(t = clients; t && t->win != trans; t = t->next);
1112 if(t)
1113 memcpy(c->tags, t->tags, sizeof initags);
1114 if(!c->isfloating)
1115 c->isfloating = (rettrans == Success) || c->isfixed;
1116 attach(c);
1117 attachstack(c);
1118 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1119 ban(c);
1120 XMapWindow(dpy, c->win);
1121 setclientstate(c, NormalState);
1122 arrange();
1123}
1124
1125void
1126mappingnotify(XEvent *e) {
1127 XMappingEvent *ev = &e->xmapping;
1128
1129 XRefreshKeyboardMapping(ev);
1130 if(ev->request == MappingKeyboard)
1131 grabkeys();
1132}
1133
1134void
1135maprequest(XEvent *e) {
1136 static XWindowAttributes wa;
1137 XMapRequestEvent *ev = &e->xmaprequest;
1138
1139 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1140 return;
1141 if(wa.override_redirect)
1142 return;
1143 if(!getclient(ev->window))
1144 manage(ev->window, &wa);
1145}
1146
1147int
1148monitorat() {
1149 int i, x, y;
1150 Window win;
1151 unsigned int mask;
1152
1153 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1154 for(i = 0; i < mcount; i++) {
1155 if((x >= monitors[i].sx && x < monitors[i].sx + monitors[i].sw)
1156 && (y >= monitors[i].sy && y < monitors[i].sy + monitors[i].sh)) {
1157 return i;
1158 }
1159 }
1160 return 0;
1161}
1162
1163void
1164movemouse(Client *c) {
1165 int x1, y1, ocx, ocy, di, nx, ny;
1166 unsigned int dui;
1167 Window dummy;
1168 XEvent ev;
1169
1170 ocx = nx = c->x;
1171 ocy = ny = c->y;
1172 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1173 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1174 return;
1175 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1176 for(;;) {
1177 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1178 switch (ev.type) {
1179 case ButtonRelease:
1180 XUngrabPointer(dpy, CurrentTime);
1181 return;
1182 case ConfigureRequest:
1183 case Expose:
1184 case MapRequest:
1185 handler[ev.type](&ev);
1186 break;
1187 case MotionNotify:
1188 XSync(dpy, False);
1189 nx = ocx + (ev.xmotion.x - x1);
1190 ny = ocy + (ev.xmotion.y - y1);
1191 Monitor *m = &monitors[monitorat()];
1192 if(abs(m->wax - nx) < SNAP)
1193 nx = m->wax;
1194 else if(abs((m->wax + m->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1195 nx = m->wax + m->waw - c->w - 2 * c->border;
1196 if(abs(m->way - ny) < SNAP)
1197 ny = m->way;
1198 else if(abs((m->way + m->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1199 ny = m->way + m->wah - c->h - 2 * c->border;
1200 if((monitors[selmonitor].layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1201 togglefloating(NULL);
1202 if((monitors[selmonitor].layout->arrange == floating) || c->isfloating)
1203 resize(c, nx, ny, c->w, c->h, False);
1204 memcpy(c->tags, monitors[monitorat()].seltags, sizeof initags);
1205 break;
1206 }
1207 }
1208}
1209
1210Client *
1211nexttiled(Client *c, int monitor) {
1212 for(; c && (c->isfloating || !isvisible(c, monitor)); c = c->next);
1213 return c;
1214}
1215
1216void
1217propertynotify(XEvent *e) {
1218 Client *c;
1219 Window trans;
1220 XPropertyEvent *ev = &e->xproperty;
1221
1222 if(ev->state == PropertyDelete)
1223 return; /* ignore */
1224 if((c = getclient(ev->window))) {
1225 switch (ev->atom) {
1226 default: break;
1227 case XA_WM_TRANSIENT_FOR:
1228 XGetTransientForHint(dpy, c->win, &trans);
1229 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1230 arrange();
1231 break;
1232 case XA_WM_NORMAL_HINTS:
1233 updatesizehints(c);
1234 break;
1235 case XA_WM_HINTS:
1236 updatewmhints(c);
1237 drawbar();
1238 break;
1239 }
1240 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1241 updatetitle(c);
1242 if(c == sel)
1243 drawbar();
1244 }
1245 }
1246}
1247
1248void
1249quit(const char *arg) {
1250 readin = running = False;
1251}
1252
1253void
1254reapply(const char *arg) {
1255 static Bool zerotags[LENGTH(tags)] = { 0 };
1256 Client *c;
1257
1258 for(c = clients; c; c = c->next) {
1259 memcpy(c->tags, zerotags, sizeof zerotags);
1260 applyrules(c);
1261 }
1262 arrange();
1263}
1264
1265void
1266resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1267 XWindowChanges wc;
1268 //Monitor scr = monitors[monitorat()];
1269// c->monitor = monitorat();
1270
1271 if(sizehints) {
1272 /* set minimum possible */
1273 if (w < 1)
1274 w = 1;
1275 if (h < 1)
1276 h = 1;
1277
1278 /* temporarily remove base dimensions */
1279 w -= c->basew;
1280 h -= c->baseh;
1281
1282 /* adjust for aspect limits */
1283 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1284 if (w * c->maxay > h * c->maxax)
1285 w = h * c->maxax / c->maxay;
1286 else if (w * c->minay < h * c->minax)
1287 h = w * c->minay / c->minax;
1288 }
1289
1290 /* adjust for increment value */
1291 if(c->incw)
1292 w -= w % c->incw;
1293 if(c->inch)
1294 h -= h % c->inch;
1295
1296 /* restore base dimensions */
1297 w += c->basew;
1298 h += c->baseh;
1299
1300 if(c->minw > 0 && w < c->minw)
1301 w = c->minw;
1302 if(c->minh > 0 && h < c->minh)
1303 h = c->minh;
1304 if(c->maxw > 0 && w > c->maxw)
1305 w = c->maxw;
1306 if(c->maxh > 0 && h > c->maxh)
1307 h = c->maxh;
1308 }
1309 if(w <= 0 || h <= 0)
1310 return;
1311 /* TODO: offscreen appearance fixes */
1312 /*
1313 if(x > scr.sw)
1314 x = scr.sw - w - 2 * c->border;
1315 if(y > scr.sh)
1316 y = scr.sh - h - 2 * c->border;
1317 if(x + w + 2 * c->border < scr.sx)
1318 x = scr.sx;
1319 if(y + h + 2 * c->border < scr.sy)
1320 y = scr.sy;
1321 */
1322 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1323 c->x = wc.x = x;
1324 c->y = wc.y = y;
1325 c->w = wc.width = w;
1326 c->h = wc.height = h;
1327 wc.border_width = c->border;
1328 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1329 configure(c);
1330 XSync(dpy, False);
1331 }
1332}
1333
1334void
1335resizemouse(Client *c) {
1336 int ocx, ocy;
1337 int nw, nh;
1338 XEvent ev;
1339
1340 ocx = c->x;
1341 ocy = c->y;
1342 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1343 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1344 return;
1345 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1346 for(;;) {
1347 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1348 switch(ev.type) {
1349 case ButtonRelease:
1350 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1351 c->w + c->border - 1, c->h + c->border - 1);
1352 XUngrabPointer(dpy, CurrentTime);
1353 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1354 return;
1355 case ConfigureRequest:
1356 case Expose:
1357 case MapRequest:
1358 handler[ev.type](&ev);
1359 break;
1360 case MotionNotify:
1361 XSync(dpy, False);
1362 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1363 nw = 1;
1364 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1365 nh = 1;
1366 if((monitors[selmonitor].layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1367 togglefloating(NULL);
1368 if((monitors[selmonitor].layout->arrange == floating) || c->isfloating)
1369 resize(c, c->x, c->y, nw, nh, True);
1370 break;
1371 }
1372 }
1373}
1374
1375void
1376restack(void) {
1377 unsigned int i;
1378 Client *c;
1379 XEvent ev;
1380 XWindowChanges wc;
1381
1382 drawbar();
1383 if(!sel)
1384 return;
1385 if(sel->isfloating || (monitors[selmonitor].layout->arrange == floating))
1386 XRaiseWindow(dpy, sel->win);
1387 if(monitors[selmonitor].layout->arrange != floating) {
1388 wc.stack_mode = Below;
1389 wc.sibling = monitors[selmonitor].barwin;
1390 if(!sel->isfloating) {
1391 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1392 wc.sibling = sel->win;
1393 }
1394 for(i = 0; i < mcount; i++) {
1395 for(c = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
1396 if(c == sel)
1397 continue;
1398 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1399 wc.sibling = c->win;
1400 }
1401 }
1402 }
1403 XSync(dpy, False);
1404 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1405}
1406
1407void
1408run(void) {
1409 char *p;
1410 char buf[sizeof stext];
1411 fd_set rd;
1412 int r, xfd;
1413 unsigned int len, offset;
1414 XEvent ev;
1415
1416 /* main event loop, also reads status text from stdin */
1417 XSync(dpy, False);
1418 xfd = ConnectionNumber(dpy);
1419 readin = True;
1420 offset = 0;
1421 len = sizeof stext - 1;
1422 buf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1423 while(running) {
1424 FD_ZERO(&rd);
1425 if(readin)
1426 FD_SET(STDIN_FILENO, &rd);
1427 FD_SET(xfd, &rd);
1428 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1429 if(errno == EINTR)
1430 continue;
1431 eprint("select failed\n");
1432 }
1433 if(FD_ISSET(STDIN_FILENO, &rd)) {
1434 switch((r = read(STDIN_FILENO, buf + offset, len - offset))) {
1435 case -1:
1436 strncpy(stext, strerror(errno), len);
1437 readin = False;
1438 break;
1439 case 0:
1440 strncpy(stext, "EOF", 4);
1441 readin = False;
1442 break;
1443 default:
1444 for(p = buf + offset; r > 0; p++, r--, offset++)
1445 if(*p == '\n' || *p == '\0') {
1446 *p = '\0';
1447 strncpy(stext, buf, len);
1448 p += r - 1; /* p is buf + offset + r - 1 */
1449 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1450 offset = r;
1451 if(r)
1452 memmove(buf, p - r + 1, r);
1453 break;
1454 }
1455 break;
1456 }
1457 drawbar();
1458 }
1459 while(XPending(dpy)) {
1460 XNextEvent(dpy, &ev);
1461 if(handler[ev.type])
1462 (handler[ev.type])(&ev); /* call handler */
1463 }
1464 }
1465}
1466
1467void
1468scan(void) {
1469 unsigned int i, num;
1470 Window *wins, d1, d2;
1471 XWindowAttributes wa;
1472
1473 wins = NULL;
1474 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1475 for(i = 0; i < num; i++) {
1476 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1477 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1478 continue;
1479 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1480 manage(wins[i], &wa);
1481 }
1482 for(i = 0; i < num; i++) { /* now the transients */
1483 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1484 continue;
1485 if(XGetTransientForHint(dpy, wins[i], &d1)
1486 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1487 manage(wins[i], &wa);
1488 }
1489 }
1490 if(wins)
1491 XFree(wins);
1492}
1493
1494void
1495setclientstate(Client *c, long state) {
1496 long data[] = {state, None};
1497
1498 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1499 PropModeReplace, (unsigned char *)data, 2);
1500}
1501
1502void
1503setlayout(const char *arg) {
1504 unsigned int i;
1505 Monitor *m = &monitors[monitorat()];
1506
1507 if(!arg) {
1508 m->layout++;
1509 if(m->layout == &layouts[LENGTH(layouts)])
1510 m->layout = &layouts[0];
1511 }
1512 else {
1513 for(i = 0; i < LENGTH(layouts); i++)
1514 if(!strcmp(arg, layouts[i].symbol))
1515 break;
1516 if(i == LENGTH(layouts))
1517 return;
1518 m->layout = &layouts[i];
1519 }
1520 if(sel)
1521 arrange();
1522 else
1523 drawbar();
1524}
1525
1526void
1527setmwfact(const char *arg) {
1528 double delta;
1529
1530 Monitor *m = &monitors[monitorat()];
1531
1532 if(!domwfact)
1533 return;
1534 /* arg handling, manipulate mwfact */
1535 if(arg == NULL)
1536 m->mwfact = MWFACT;
1537 else if(sscanf(arg, "%lf", &delta) == 1) {
1538 if(arg[0] == '+' || arg[0] == '-')
1539 m->mwfact += delta;
1540 else
1541 m->mwfact = delta;
1542 if(m->mwfact < 0.1)
1543 m->mwfact = 0.1;
1544 else if(m->mwfact > 0.9)
1545 m->mwfact = 0.9;
1546 }
1547 arrange();
1548}
1549
1550void
1551setup(void) {
1552 unsigned int i, j, k;
1553 Monitor *m;
1554 XSetWindowAttributes wa;
1555 XineramaScreenInfo *info = NULL;
1556
1557 /* init atoms */
1558 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1559 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1560 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1561 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1562 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1563 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1564
1565 /* init cursors */
1566 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1567 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1568 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1569
1570 // init screens/monitors first
1571 mcount = 1;
1572 if((isxinerama = XineramaIsActive(dpy)))
1573 info = XineramaQueryScreens(dpy, &mcount);
1574 monitors = emallocz(mcount * sizeof(Monitor));
1575
1576 root = DefaultRootWindow(dpy);
1577
1578 for(i = 0; i < mcount; i++) {
1579 /* init geometry */
1580 m = &monitors[i];
1581
1582 m->screen = isxinerama ? 0 : i;
1583
1584 if (mcount != 1 && isxinerama) {
1585 m->sx = info[i].x_org;
1586 m->sy = info[i].y_org;
1587 m->sw = info[i].width;
1588 m->sh = info[i].height;
1589 fprintf(stderr, "monitor[%d]: %d,%d,%d,%d\n", i, m->sx, m->sy, m->sw, m->sh);
1590 }
1591 else {
1592 m->sx = 0;
1593 m->sy = 0;
1594 m->sw = DisplayWidth(dpy, m->screen);
1595 m->sh = DisplayHeight(dpy, m->screen);
1596 }
1597
1598 m->seltags = emallocz(sizeof initags);
1599 m->prevtags = emallocz(sizeof initags);
1600
1601 memcpy(m->seltags, initags, sizeof initags);
1602 memcpy(m->prevtags, initags, sizeof initags);
1603
1604 /* init appearance */
1605 m->dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR, m->screen);
1606 m->dc.norm[ColBG] = getcolor(NORMBGCOLOR, m->screen);
1607 m->dc.norm[ColFG] = getcolor(NORMFGCOLOR, m->screen);
1608 m->dc.sel[ColBorder] = getcolor(SELBORDERCOLOR, m->screen);
1609 m->dc.sel[ColBG] = getcolor(SELBGCOLOR, m->screen);
1610 m->dc.sel[ColFG] = getcolor(SELFGCOLOR, m->screen);
1611 initfont(m, FONT);
1612 m->dc.h = bh = m->dc.font.height + 2;
1613
1614 /* init layouts */
1615 m->mwfact = MWFACT;
1616 m->layout = &layouts[0];
1617 for(blw = k = 0; k < LENGTH(layouts); k++) {
1618 j = textw(m, layouts[k].symbol);
1619 if(j > blw)
1620 blw = j;
1621 }
1622
1623 // TODO: bpos per screen?
1624 bpos = BARPOS;
1625 wa.override_redirect = 1;
1626 wa.background_pixmap = ParentRelative;
1627 wa.event_mask = ButtonPressMask | ExposureMask;
1628
1629 /* init bars */
1630 m->barwin = XCreateWindow(dpy, root, m->sx, m->sy, m->sw, bh, 0,
1631 DefaultDepth(dpy, m->screen), CopyFromParent, DefaultVisual(dpy, m->screen),
1632 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1633 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1634 updatebarpos(m);
1635 XMapRaised(dpy, m->barwin);
1636 strcpy(stext, "dwm-"VERSION);
1637 m->dc.drawable = XCreatePixmap(dpy, root, m->sw, bh, DefaultDepth(dpy, m->screen));
1638 m->dc.gc = XCreateGC(dpy, root, 0, 0);
1639 XSetLineAttributes(dpy, m->dc.gc, 1, LineSolid, CapButt, JoinMiter);
1640 if(!m->dc.font.set)
1641 XSetFont(dpy, m->dc.gc, m->dc.font.xfont->fid);
1642
1643 /* EWMH support per monitor */
1644 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1645 PropModeReplace, (unsigned char *) netatom, NetLast);
1646
1647 /* select for events */
1648 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1649 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1650 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1651 XSelectInput(dpy, root, wa.event_mask);
1652 }
1653 if(info)
1654 XFree(info);
1655
1656 /* grab keys */
1657 grabkeys();
1658
1659 /* init tags */
1660 compileregs();
1661
1662 selmonitor = monitorat();
1663 fprintf(stderr, "selmonitor == %d\n", selmonitor);
1664}
1665
1666void
1667spawn(const char *arg) {
1668 static char *shell = NULL;
1669
1670 if(!shell && !(shell = getenv("SHELL")))
1671 shell = "/bin/sh";
1672 if(!arg)
1673 return;
1674 /* The double-fork construct avoids zombie processes and keeps the code
1675 * clean from stupid signal handlers. */
1676 if(fork() == 0) {
1677 if(fork() == 0) {
1678 if(dpy)
1679 close(ConnectionNumber(dpy));
1680 setsid();
1681 execl(shell, shell, "-c", arg, (char *)NULL);
1682 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1683 perror(" failed");
1684 }
1685 exit(0);
1686 }
1687 wait(0);
1688}
1689
1690void
1691tag(const char *arg) {
1692 unsigned int i;
1693
1694 if(!sel)
1695 return;
1696 for(i = 0; i < LENGTH(tags); i++)
1697 sel->tags[i] = (NULL == arg);
1698 sel->tags[idxoftag(arg)] = True;
1699 arrange();
1700}
1701
1702unsigned int
1703textnw(Monitor *m, const char *text, unsigned int len) {
1704 XRectangle r;
1705
1706 if(m->dc.font.set) {
1707 XmbTextExtents(m->dc.font.set, text, len, NULL, &r);
1708 return r.width;
1709 }
1710 return XTextWidth(m->dc.font.xfont, text, len);
1711}
1712
1713unsigned int
1714textw(Monitor *m, const char *text) {
1715 return textnw(m, text, strlen(text)) + m->dc.font.height;
1716}
1717
1718void
1719tile(void) {
1720 unsigned int i, j, n, nx, ny, nw, nh, mw, th;
1721 Client *c, *mc;
1722
1723 domwfact = dozoom = True;
1724
1725 nx = ny = nw = 0; /* gcc stupidity requires this */
1726
1727 for (i = 0; i < mcount; i++) {
1728 Monitor *m = &monitors[i];
1729
1730 for(n = 0, c = nexttiled(clients, i); c; c = nexttiled(c->next, i))
1731 n++;
1732
1733 /* window geoms */
1734 mw = (n == 1) ? m->waw : m->mwfact * m->waw;
1735 th = (n > 1) ? m->wah / (n - 1) : 0;
1736 if(n > 1 && th < bh)
1737 th = m->wah;
1738
1739 for(j = 0, c = mc = nexttiled(clients, i); c; c = nexttiled(c->next, i)) {
1740 if(j == 0) { /* master */
1741 nx = m->wax;
1742 ny = m->way;
1743 nw = mw - 2 * c->border;
1744 nh = m->wah - 2 * c->border;
1745 }
1746 else { /* tile window */
1747 if(j == 1) {
1748 ny = m->way;
1749 nx += mc->w + 2 * mc->border;
1750 nw = m->waw - mw - 2 * c->border;
1751 }
1752 if(j + 1 == n) /* remainder */
1753 nh = (m->way + m->wah) - ny - 2 * c->border;
1754 else
1755 nh = th - 2 * c->border;
1756 }
1757 fprintf(stderr, "tile(%d, %d, %d, %d)\n", nx, ny, nw, nh);
1758 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1759 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1760 /* client doesn't accept size constraints */
1761 resize(c, nx, ny, nw, nh, False);
1762 if(n > 1 && th != m->wah)
1763 ny = c->y + c->h + 2 * c->border;
1764
1765 j++;
1766 }
1767 }
1768 fprintf(stderr, "done\n");
1769}
1770void
1771togglebar(const char *arg) {
1772 if(bpos == BarOff)
1773 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1774 else
1775 bpos = BarOff;
1776 updatebarpos(&monitors[monitorat()]);
1777 arrange();
1778}
1779
1780void
1781togglefloating(const char *arg) {
1782 if(!sel)
1783 return;
1784 sel->isfloating = !sel->isfloating;
1785 if(sel->isfloating)
1786 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1787 arrange();
1788}
1789
1790void
1791toggletag(const char *arg) {
1792 unsigned int i, j;
1793
1794 if(!sel)
1795 return;
1796 i = idxoftag(arg);
1797 sel->tags[i] = !sel->tags[i];
1798 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1799 if(j == LENGTH(tags))
1800 sel->tags[i] = True; /* at least one tag must be enabled */
1801 arrange();
1802}
1803
1804void
1805toggleview(const char *arg) {
1806 unsigned int i, j;
1807
1808 Monitor *m = &monitors[monitorat()];
1809
1810 i = idxoftag(arg);
1811 m->seltags[i] = !m->seltags[i];
1812 for(j = 0; j < LENGTH(tags) && !m->seltags[j]; j++);
1813 if(j == LENGTH(tags))
1814 m->seltags[i] = True; /* at least one tag must be viewed */
1815 arrange();
1816}
1817
1818void
1819unban(Client *c) {
1820 if(!c->isbanned)
1821 return;
1822 XMoveWindow(dpy, c->win, c->x, c->y);
1823 c->isbanned = False;
1824}
1825
1826void
1827unmanage(Client *c) {
1828 XWindowChanges wc;
1829
1830 wc.border_width = c->oldborder;
1831 /* The server grab construct avoids race conditions. */
1832 XGrabServer(dpy);
1833 XSetErrorHandler(xerrordummy);
1834 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1835 detach(c);
1836 detachstack(c);
1837 if(sel == c)
1838 focus(NULL);
1839 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1840 setclientstate(c, WithdrawnState);
1841 free(c->tags);
1842 free(c);
1843 XSync(dpy, False);
1844 XSetErrorHandler(xerror);
1845 XUngrabServer(dpy);
1846 arrange();
1847}
1848
1849void
1850unmapnotify(XEvent *e) {
1851 Client *c;
1852 XUnmapEvent *ev = &e->xunmap;
1853
1854 if((c = getclient(ev->window)))
1855 unmanage(c);
1856}
1857
1858void
1859updatebarpos(Monitor *m) {
1860 XEvent ev;
1861
1862 m->wax = m->sx;
1863 m->way = m->sy;
1864 m->wah = m->sh;
1865 m->waw = m->sw;
1866 switch(bpos) {
1867 default:
1868 m->wah -= bh;
1869 m->way += bh;
1870 XMoveWindow(dpy, m->barwin, m->sx, m->sy);
1871 break;
1872 case BarBot:
1873 m->wah -= bh;
1874 XMoveWindow(dpy, m->barwin, m->sx, m->sy + m->wah);
1875 break;
1876 case BarOff:
1877 XMoveWindow(dpy, m->barwin, m->sx, m->sy - bh);
1878 break;
1879 }
1880 XSync(dpy, False);
1881 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1882}
1883
1884void
1885updatesizehints(Client *c) {
1886 long msize;
1887 XSizeHints size;
1888
1889 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1890 size.flags = PSize;
1891 c->flags = size.flags;
1892 if(c->flags & PBaseSize) {
1893 c->basew = size.base_width;
1894 c->baseh = size.base_height;
1895 }
1896 else if(c->flags & PMinSize) {
1897 c->basew = size.min_width;
1898 c->baseh = size.min_height;
1899 }
1900 else
1901 c->basew = c->baseh = 0;
1902 if(c->flags & PResizeInc) {
1903 c->incw = size.width_inc;
1904 c->inch = size.height_inc;
1905 }
1906 else
1907 c->incw = c->inch = 0;
1908 if(c->flags & PMaxSize) {
1909 c->maxw = size.max_width;
1910 c->maxh = size.max_height;
1911 }
1912 else
1913 c->maxw = c->maxh = 0;
1914 if(c->flags & PMinSize) {
1915 c->minw = size.min_width;
1916 c->minh = size.min_height;
1917 }
1918 else if(c->flags & PBaseSize) {
1919 c->minw = size.base_width;
1920 c->minh = size.base_height;
1921 }
1922 else
1923 c->minw = c->minh = 0;
1924 if(c->flags & PAspect) {
1925 c->minax = size.min_aspect.x;
1926 c->maxax = size.max_aspect.x;
1927 c->minay = size.min_aspect.y;
1928 c->maxay = size.max_aspect.y;
1929 }
1930 else
1931 c->minax = c->maxax = c->minay = c->maxay = 0;
1932 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1933 && c->maxw == c->minw && c->maxh == c->minh);
1934}
1935
1936void
1937updatetitle(Client *c) {
1938 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1939 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1940}
1941
1942void
1943updatewmhints(Client *c) {
1944 XWMHints *wmh;
1945
1946 if((wmh = XGetWMHints(dpy, c->win))) {
1947 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1948 XFree(wmh);
1949 }
1950}
1951
1952/* There's no way to check accesses to destroyed windows, thus those cases are
1953 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1954 * default error handler, which may call exit. */
1955int
1956xerror(Display *dpy, XErrorEvent *ee) {
1957 if(ee->error_code == BadWindow
1958 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1959 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1960 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1961 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1962 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1963 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1964 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1965 return 0;
1966 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1967 ee->request_code, ee->error_code);
1968 return xerrorxlib(dpy, ee); /* may call exit */
1969}
1970
1971int
1972xerrordummy(Display *dsply, XErrorEvent *ee) {
1973 return 0;
1974}
1975
1976/* Startup Error handler to check if another window manager
1977 * is already running. */
1978int
1979xerrorstart(Display *dsply, XErrorEvent *ee) {
1980 otherwm = True;
1981 return -1;
1982}
1983
1984void
1985view(const char *arg) {
1986 unsigned int i;
1987 Bool tmp[LENGTH(tags)];
1988 Monitor *m = &monitors[monitorat()];
1989
1990 for(i = 0; i < LENGTH(tags); i++)
1991 tmp[i] = (NULL == arg);
1992 tmp[idxoftag(arg)] = True;
1993 if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
1994 memcpy(m->prevtags, m->seltags, sizeof initags);
1995 memcpy(m->seltags, tmp, sizeof initags);
1996 arrange();
1997 }
1998}
1999
2000void
2001viewprevtag(const char *arg) {
2002 static Bool tmp[LENGTH(tags)];
2003
2004 Monitor *m = &monitors[monitorat()];
2005
2006 memcpy(tmp, m->seltags, sizeof initags);
2007 memcpy(m->seltags, m->prevtags, sizeof initags);
2008 memcpy(m->prevtags, tmp, sizeof initags);
2009 arrange();
2010}
2011
2012void
2013zoom(const char *arg) {
2014 Client *c;
2015
2016 if(!sel || !dozoom || sel->isfloating)
2017 return;
2018 if((c = sel) == nexttiled(clients, c->monitor))
2019 if(!(c = nexttiled(c->next, c->monitor)))
2020 return;
2021 detach(c);
2022 attach(c);
2023 focus(c);
2024 arrange();
2025}
2026
2027void
2028movetomonitor(const char *arg) {
2029 if (sel) {
2030 sel->monitor = arg ? atoi(arg) : (sel->monitor+1) % mcount;
2031
2032 memcpy(sel->tags, monitors[sel->monitor].seltags, sizeof initags);
2033 resize(sel, monitors[sel->monitor].wax, monitors[sel->monitor].way, sel->w, sel->h, True);
2034 arrange();
2035 }
2036}
2037
2038void
2039selectmonitor(const char *arg) {
2040 Monitor *m = &monitors[arg ? atoi(arg) : (monitorat()+1) % mcount];
2041
2042 XWarpPointer(dpy, None, root, 0, 0, 0, 0, m->wax+m->waw/2, m->way+m->wah/2);
2043 focus(NULL);
2044}
2045
2046
2047int
2048main(int argc, char *argv[]) {
2049 if(argc == 2 && !strcmp("-v", argv[1]))
2050 eprint("dwm-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk, "
2051 "Jukka Salmi, Premysl Hruby, Szabolcs Nagy, Christof Musik\n");
2052 else if(argc != 1)
2053 eprint("usage: dwm [-v]\n");
2054
2055 setlocale(LC_CTYPE, "");
2056 if(!(dpy = XOpenDisplay(0)))
2057 eprint("dwm: cannot open display\n");
2058
2059 checkotherwm();
2060 setup();
2061 drawbar();
2062 scan();
2063 run();
2064 cleanup();
2065
2066 XCloseDisplay(dpy);
2067 return 0;
2068}