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[dwm.git] / dwm.c
1 /* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif /* XINERAMA */
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48 #define LENGTH(X) (sizeof X / sizeof X[0])
49 #define MAX(A, B) ((A) > (B) ? (A) : (B))
50 #define MIN(A, B) ((A) < (B) ? (A) : (B))
51 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
53 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57 /* enums */
58 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65 typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 void *v;
70 } Arg;
71
72 typedef struct {
73 unsigned int click;
74 unsigned int mask;
75 unsigned int button;
76 void (*func)(const Arg *arg);
77 const Arg arg;
78 } Button;
79
80 typedef struct Monitor Monitor;
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Monitor *mon;
93 Window win;
94 };
95
96 typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109 } DC; /* draw context */
110
111 typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116 } Key;
117
118 typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121 } Layout;
122
123 struct Monitor {
124 int screen_number;
125 float mfact;
126 int by, btx; /* bar geometry */
127 int mx, my, mw, mh; /* screen size */
128 int wx, wy, ww, wh; /* window area */
129 unsigned int seltags;
130 unsigned int sellt;
131 unsigned int tagset[2];
132 Bool showbar;
133 Bool topbar;
134 Client *clients;
135 Client *sel;
136 Client *stack;
137 Monitor *next;
138 Window barwin;
139 Layout *lt[2];
140 };
141
142 typedef struct {
143 const char *class;
144 const char *instance;
145 const char *title;
146 unsigned int tags;
147 Bool isfloating;
148 } Rule;
149
150 /* function declarations */
151 static void applyrules(Client *c);
152 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
153 static void arrange(void);
154 static void attach(Client *c);
155 static void attachstack(Client *c);
156 static void buttonpress(XEvent *e);
157 static void checkotherwm(void);
158 static void cleanup(void);
159 static void cleanupmons(void);
160 static void clearurgent(Client *c);
161 static void configure(Client *c);
162 static void configurenotify(XEvent *e);
163 static void configurerequest(XEvent *e);
164 static void destroynotify(XEvent *e);
165 static void detach(Client *c);
166 static void detachstack(Client *c);
167 static void die(const char *errstr, ...);
168 static Monitor *dirtomon(int dir);
169 static void drawbar(Monitor *m);
170 static void drawbars(void);
171 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
172 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
173 static void enternotify(XEvent *e);
174 static void expose(XEvent *e);
175 static void focus(Client *c);
176 static void focusin(XEvent *e);
177 static void focusmon(const Arg *arg);
178 static void focusstack(const Arg *arg);
179 static unsigned long getcolor(const char *colstr);
180 static Bool getrootptr(int *x, int *y);
181 static long getstate(Window w);
182 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
183 static void grabbuttons(Client *c, Bool focused);
184 static void grabkeys(void);
185 static void initfont(const char *fontstr);
186 static Bool isprotodel(Client *c);
187 static void keypress(XEvent *e);
188 static void killclient(const Arg *arg);
189 static void manage(Window w, XWindowAttributes *wa);
190 static void mappingnotify(XEvent *e);
191 static void maprequest(XEvent *e);
192 static void monocle(Monitor *m);
193 static void movemouse(const Arg *arg);
194 static Client *nexttiled(Client *c);
195 static Monitor *ptrtomon(int x, int y);
196 static void propertynotify(XEvent *e);
197 static void quit(const Arg *arg);
198 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
199 static void resizemouse(const Arg *arg);
200 static void restack(Monitor *m);
201 static void run(void);
202 static void scan(void);
203 static void sendmon(Client *c, Monitor *m);
204 static void setclientstate(Client *c, long state);
205 static void setlayout(const Arg *arg);
206 static void setmfact(const Arg *arg);
207 static void setup(void);
208 static void showhide(Client *c);
209 static void sigchld(int signal);
210 static void spawn(const Arg *arg);
211 static void tag(const Arg *arg);
212 static void tagmon(const Arg *arg);
213 static int textnw(const char *text, unsigned int len);
214 static void tile(Monitor *);
215 static void togglebar(const Arg *arg);
216 static void togglefloating(const Arg *arg);
217 static void toggletag(const Arg *arg);
218 static void toggleview(const Arg *arg);
219 static void unfocus(Client *c);
220 static void unmanage(Client *c);
221 static void unmapnotify(XEvent *e);
222 static void updategeom(void);
223 static void updatebarpos(Monitor *m);
224 static void updatebars(void);
225 static void updatenumlockmask(void);
226 static void updatesizehints(Client *c);
227 static void updatestatus(void);
228 static void updatetitle(Client *c);
229 static void updatewmhints(Client *c);
230 static void view(const Arg *arg);
231 static Client *wintoclient(Window w);
232 static Monitor *wintomon(Window w);
233 static int xerror(Display *dpy, XErrorEvent *ee);
234 static int xerrordummy(Display *dpy, XErrorEvent *ee);
235 static int xerrorstart(Display *dpy, XErrorEvent *ee);
236 static void zoom(const Arg *arg);
237
238 /* variables */
239 static char stext[256];
240 static int screen;
241 static int sw, sh; /* X display screen geometry x, y, width, height */
242 static int bh, blw = 0; /* bar geometry */
243 static int (*xerrorxlib)(Display *, XErrorEvent *);
244 static unsigned int numlockmask = 0;
245 static void (*handler[LASTEvent]) (XEvent *) = {
246 [ButtonPress] = buttonpress,
247 [ConfigureRequest] = configurerequest,
248 [ConfigureNotify] = configurenotify,
249 [DestroyNotify] = destroynotify,
250 [EnterNotify] = enternotify,
251 [Expose] = expose,
252 [FocusIn] = focusin,
253 [KeyPress] = keypress,
254 [MappingNotify] = mappingnotify,
255 [MapRequest] = maprequest,
256 [PropertyNotify] = propertynotify,
257 [UnmapNotify] = unmapnotify
258 };
259 static Atom wmatom[WMLast], netatom[NetLast];
260 static Bool otherwm;
261 static Bool running = True;
262 static Cursor cursor[CurLast];
263 static Display *dpy;
264 static DC dc;
265 static Monitor *mons = NULL, *selmon = NULL;
266 static Window root;
267
268 /* configuration, allows nested code to access above variables */
269 #include "config.h"
270
271 /* compile-time check if all tags fit into an unsigned int bit array. */
272 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
273
274 /* function implementations */
275 void
276 applyrules(Client *c) {
277 unsigned int i;
278 Rule *r;
279 XClassHint ch = { 0 };
280
281 /* rule matching */
282 c->isfloating = c->tags = 0;
283 if(XGetClassHint(dpy, c->win, &ch)) {
284 for(i = 0; i < LENGTH(rules); i++) {
285 r = &rules[i];
286 if((!r->title || strstr(c->name, r->title))
287 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
288 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance))))
289 {
290 c->isfloating = r->isfloating;
291 c->tags |= r->tags;
292 }
293 }
294 if(ch.res_class)
295 XFree(ch.res_class);
296 if(ch.res_name)
297 XFree(ch.res_name);
298 }
299 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
300 }
301
302 Bool
303 applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
304 Bool baseismin;
305 Monitor *m = c->mon;
306
307 /* set minimum possible */
308 *w = MAX(1, *w);
309 *h = MAX(1, *h);
310 if(interact) {
311 if(*x > sw)
312 *x = sw - WIDTH(c);
313 if(*y > sh)
314 *y = sh - HEIGHT(c);
315 if(*x + *w + 2 * c->bw < 0)
316 *x = 0;
317 if(*y + *h + 2 * c->bw < 0)
318 *y = 0;
319 }
320 else {
321 if(*x > m->mx + m->mw)
322 *x = m->mx + m->mw - WIDTH(c);
323 if(*y > m->my + m->mh)
324 *y = m->my + m->mh - HEIGHT(c);
325 if(*x + *w + 2 * c->bw < m->mx)
326 *x = m->mx;
327 if(*y + *h + 2 * c->bw < m->my)
328 *y = m->my;
329 }
330 if(*h < bh)
331 *h = bh;
332 if(*w < bh)
333 *w = bh;
334 if(resizehints || c->isfloating) {
335 /* see last two sentences in ICCCM 4.1.2.3 */
336 baseismin = c->basew == c->minw && c->baseh == c->minh;
337 if(!baseismin) { /* temporarily remove base dimensions */
338 *w -= c->basew;
339 *h -= c->baseh;
340 }
341 /* adjust for aspect limits */
342 if(c->mina > 0 && c->maxa > 0) {
343 if(c->maxa < (float)*w / *h)
344 *w = *h * c->maxa;
345 else if(c->mina < (float)*h / *w)
346 *h = *w * c->mina;
347 }
348 if(baseismin) { /* increment calculation requires this */
349 *w -= c->basew;
350 *h -= c->baseh;
351 }
352 /* adjust for increment value */
353 if(c->incw)
354 *w -= *w % c->incw;
355 if(c->inch)
356 *h -= *h % c->inch;
357 /* restore base dimensions */
358 *w += c->basew;
359 *h += c->baseh;
360 *w = MAX(*w, c->minw);
361 *h = MAX(*h, c->minh);
362 if(c->maxw)
363 *w = MIN(*w, c->maxw);
364 if(c->maxh)
365 *h = MIN(*h, c->maxh);
366 }
367 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
368 }
369
370 void
371 arrange(void) {
372 Monitor *m;
373
374 /* optimise two loops into one, check focus(NULL) */
375 for(m = mons; m; m = m->next)
376 showhide(m->stack);
377 focus(NULL);
378 for(m = mons; m; m = m->next) {
379 if(m->lt[m->sellt]->arrange)
380 m->lt[m->sellt]->arrange(m);
381 restack(m);
382 }
383 }
384
385 void
386 attach(Client *c) {
387 c->next = c->mon->clients;
388 c->mon->clients = c;
389 }
390
391 void
392 attachstack(Client *c) {
393 c->snext = c->mon->stack;
394 c->mon->stack = c;
395 }
396
397 void
398 buttonpress(XEvent *e) {
399 unsigned int i, x, click;
400 Arg arg = {0};
401 Client *c;
402 Monitor *m;
403 XButtonPressedEvent *ev = &e->xbutton;
404
405 click = ClkRootWin;
406 /* focus monitor if necessary */
407 if((m = wintomon(ev->window)) && m != selmon) {
408 unfocus(selmon->sel);
409 selmon = m;
410 focus(NULL);
411 }
412 if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
413 i = 0;
414 x = selmon->btx;
415 do
416 x += TEXTW(tags[i]);
417 while(ev->x >= x && ++i < LENGTH(tags));
418 if(i < LENGTH(tags)) {
419 click = ClkTagBar;
420 arg.ui = 1 << i;
421 }
422 else if(ev->x < x + blw)
423 click = ClkLtSymbol;
424 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
425 click = ClkStatusText;
426 else
427 click = ClkWinTitle;
428 }
429 else if((c = wintoclient(ev->window))) {
430 focus(c);
431 click = ClkClientWin;
432 }
433 for(i = 0; i < LENGTH(buttons); i++)
434 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
435 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
436 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
437 }
438
439 void
440 checkotherwm(void) {
441 otherwm = False;
442 xerrorxlib = XSetErrorHandler(xerrorstart);
443 /* this causes an error if some other window manager is running */
444 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
445 XSync(dpy, False);
446 if(otherwm)
447 die("dwm: another window manager is already running\n");
448 XSetErrorHandler(xerror);
449 XSync(dpy, False);
450 }
451
452 void
453 cleanup(void) {
454 Arg a = {.ui = ~0};
455 Layout foo = { "", NULL };
456 Monitor *m;
457
458 view(&a);
459 selmon->lt[selmon->sellt] = &foo;
460 for(m = mons; m; m = m->next)
461 while(m->stack)
462 unmanage(m->stack);
463 if(dc.font.set)
464 XFreeFontSet(dpy, dc.font.set);
465 else
466 XFreeFont(dpy, dc.font.xfont);
467 XUngrabKey(dpy, AnyKey, AnyModifier, root);
468 XFreePixmap(dpy, dc.drawable);
469 XFreeGC(dpy, dc.gc);
470 XFreeCursor(dpy, cursor[CurNormal]);
471 XFreeCursor(dpy, cursor[CurResize]);
472 XFreeCursor(dpy, cursor[CurMove]);
473 cleanupmons();
474 XSync(dpy, False);
475 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
476 }
477
478 void
479 cleanupmons(void) {
480 Monitor *m;
481
482 while(mons) {
483 m = mons->next;
484 XUnmapWindow(dpy, mons->barwin);
485 XDestroyWindow(dpy, mons->barwin);
486 free(mons);
487 mons = m;
488 }
489 }
490
491 void
492 clearurgent(Client *c) {
493 XWMHints *wmh;
494
495 c->isurgent = False;
496 if(!(wmh = XGetWMHints(dpy, c->win)))
497 return;
498 wmh->flags &= ~XUrgencyHint;
499 XSetWMHints(dpy, c->win, wmh);
500 XFree(wmh);
501 }
502
503 void
504 configure(Client *c) {
505 XConfigureEvent ce;
506
507 ce.type = ConfigureNotify;
508 ce.display = dpy;
509 ce.event = c->win;
510 ce.window = c->win;
511 ce.x = c->x;
512 ce.y = c->y;
513 ce.width = c->w;
514 ce.height = c->h;
515 ce.border_width = c->bw;
516 ce.above = None;
517 ce.override_redirect = False;
518 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
519 }
520
521 void
522 configurenotify(XEvent *e) {
523 Monitor *m;
524 XConfigureEvent *ev = &e->xconfigure;
525
526 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
527 sw = ev->width;
528 sh = ev->height;
529 updategeom();
530 if(dc.drawable != 0)
531 XFreePixmap(dpy, dc.drawable);
532 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
533 updatebars();
534 for(m = mons; m; m = m->next)
535 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
536 arrange();
537 }
538 }
539
540 void
541 configurerequest(XEvent *e) {
542 Client *c;
543 Monitor *m;
544 XConfigureRequestEvent *ev = &e->xconfigurerequest;
545 XWindowChanges wc;
546
547 if((c = wintoclient(ev->window))) {
548 if(ev->value_mask & CWBorderWidth)
549 c->bw = ev->border_width;
550 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
551 m = c->mon;
552 if(ev->value_mask & CWX)
553 c->x = m->mx + ev->x;
554 if(ev->value_mask & CWY)
555 c->y = m->my + ev->y;
556 if(ev->value_mask & CWWidth)
557 c->w = ev->width;
558 if(ev->value_mask & CWHeight)
559 c->h = ev->height;
560 if((c->x - m->mx + c->w) > m->mw && c->isfloating)
561 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
562 if((c->y - m->my + c->h) > m->mh && c->isfloating)
563 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
564 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
565 configure(c);
566 if(ISVISIBLE(c))
567 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
568 }
569 else
570 configure(c);
571 }
572 else {
573 wc.x = ev->x;
574 wc.y = ev->y;
575 wc.width = ev->width;
576 wc.height = ev->height;
577 wc.border_width = ev->border_width;
578 wc.sibling = ev->above;
579 wc.stack_mode = ev->detail;
580 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
581 }
582 XSync(dpy, False);
583 }
584
585 void
586 destroynotify(XEvent *e) {
587 Client *c;
588 XDestroyWindowEvent *ev = &e->xdestroywindow;
589
590 if((c = wintoclient(ev->window)))
591 unmanage(c);
592 }
593
594 void
595 detach(Client *c) {
596 Client **tc;
597
598 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
599 *tc = c->next;
600 }
601
602 void
603 detachstack(Client *c) {
604 Client **tc, *t;
605
606 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
607 *tc = c->snext;
608
609 if(c == c->mon->sel) {
610 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
611 c->mon->sel = t;
612 }
613 }
614
615 void
616 die(const char *errstr, ...) {
617 va_list ap;
618
619 va_start(ap, errstr);
620 vfprintf(stderr, errstr, ap);
621 va_end(ap);
622 exit(EXIT_FAILURE);
623 }
624
625 Monitor *
626 dirtomon(int dir) {
627 Monitor *m = NULL;
628
629 if(dir > 0) {
630 if(!(m = selmon->next))
631 m = mons;
632 }
633 else {
634 if(selmon == mons)
635 for(m = mons; m->next; m = m->next);
636 else
637 for(m = mons; m->next != selmon; m = m->next);
638 }
639 return m;
640 }
641
642 void
643 drawbar(Monitor *m) {
644 int x;
645 unsigned int i, occ = 0, urg = 0;
646 unsigned long *col;
647 Client *c;
648
649 for(c = m->clients; c; c = c->next) {
650 occ |= c->tags;
651 if(c->isurgent)
652 urg |= c->tags;
653 }
654 dc.x = 0;
655 if(mons->next) { /* more than a single monitor */
656 dc.w = TEXTW(monsyms[m->screen_number]);
657 drawtext(monsyms[m->screen_number], selmon == m ? dc.sel : dc.norm, False);
658 dc.x += dc.w;
659 }
660 m->btx = dc.x;
661 for(i = 0; i < LENGTH(tags); i++) {
662 dc.w = TEXTW(tags[i]);
663 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
664 drawtext(tags[i], col, urg & 1 << i);
665 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
666 occ & 1 << i, urg & 1 << i, col);
667 dc.x += dc.w;
668 }
669 if(blw > 0) {
670 dc.w = blw;
671 drawtext(m->lt[m->sellt]->symbol, dc.norm, False);
672 x = dc.x + dc.w;
673 }
674 else
675 x = dc.x;
676 if(m == selmon) { /* status is only drawn on selected monitor */
677 dc.w = TEXTW(stext);
678 dc.x = m->ww - dc.w;
679 if(dc.x < x) {
680 dc.x = x;
681 dc.w = m->ww - x;
682 }
683 drawtext(stext, dc.norm, False);
684 }
685 else
686 dc.x = m->ww;
687 if((dc.w = dc.x - x) > bh) {
688 dc.x = x;
689 if(m->sel) {
690 col = m == selmon ? dc.sel : dc.norm;
691 drawtext(m->sel->name, col, False);
692 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
693 }
694 else
695 drawtext(NULL, dc.norm, False);
696 }
697 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
698 XSync(dpy, False);
699 }
700
701 void
702 drawbars(void) {
703 Monitor *m;
704
705 for(m = mons; m; m = m->next)
706 drawbar(m);
707 }
708
709 void
710 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
711 int x;
712 XGCValues gcv;
713 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
714
715 gcv.foreground = col[invert ? ColBG : ColFG];
716 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
717 x = (dc.font.ascent + dc.font.descent + 2) / 4;
718 r.x = dc.x + 1;
719 r.y = dc.y + 1;
720 if(filled) {
721 r.width = r.height = x + 1;
722 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
723 }
724 else if(empty) {
725 r.width = r.height = x;
726 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
727 }
728 }
729
730 void
731 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
732 char buf[256];
733 int i, x, y, h, len, olen;
734 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
735
736 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
737 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
738 if(!text)
739 return;
740 olen = strlen(text);
741 h = dc.font.ascent + dc.font.descent;
742 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
743 x = dc.x + (h / 2);
744 /* shorten text if necessary */
745 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
746 if(!len)
747 return;
748 memcpy(buf, text, len);
749 if(len < olen)
750 for(i = len; i && i > len - 3; buf[--i] = '.');
751 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
752 if(dc.font.set)
753 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
754 else
755 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
756 }
757
758 void
759 enternotify(XEvent *e) {
760 Client *c;
761 Monitor *m;
762 XCrossingEvent *ev = &e->xcrossing;
763
764 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
765 return;
766 if((m = wintomon(ev->window)) && m != selmon) {
767 unfocus(selmon->sel);
768 selmon = m;
769 }
770 if((c = wintoclient(ev->window)))
771 focus(c);
772 else
773 focus(NULL);
774 }
775
776 void
777 expose(XEvent *e) {
778 Monitor *m;
779 XExposeEvent *ev = &e->xexpose;
780
781 if(ev->count == 0 && (m = wintomon(ev->window)))
782 drawbar(m);
783 }
784
785 void
786 focus(Client *c) {
787 if(!c || !ISVISIBLE(c))
788 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
789 if(selmon->sel)
790 unfocus(selmon->sel);
791 if(c) {
792 if(c->mon != selmon)
793 selmon = c->mon;
794 if(c->isurgent)
795 clearurgent(c);
796 detachstack(c);
797 attachstack(c);
798 grabbuttons(c, True);
799 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
800 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
801 }
802 else
803 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
804 selmon->sel = c;
805 drawbars();
806 }
807
808 void
809 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
810 XFocusChangeEvent *ev = &e->xfocus;
811
812 if(selmon->sel && ev->window != selmon->sel->win)
813 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
814 }
815
816 void
817 focusmon(const Arg *arg) {
818 Monitor *m = NULL;
819
820 if(!mons->next)
821 return;
822 m = dirtomon(arg->i);
823 unfocus(selmon->sel);
824 selmon = m;
825 focus(NULL);
826 }
827
828 void
829 focusstack(const Arg *arg) {
830 Client *c = NULL, *i;
831
832 if(!selmon->sel)
833 return;
834 if(arg->i > 0) {
835 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
836 if(!c)
837 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
838 }
839 else {
840 for(i = selmon->clients; i != selmon->sel; i = i->next)
841 if(ISVISIBLE(i))
842 c = i;
843 if(!c)
844 for(; i; i = i->next)
845 if(ISVISIBLE(i))
846 c = i;
847 }
848 if(c) {
849 focus(c);
850 restack(selmon);
851 }
852 }
853
854 unsigned long
855 getcolor(const char *colstr) {
856 Colormap cmap = DefaultColormap(dpy, screen);
857 XColor color;
858
859 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
860 die("error, cannot allocate color '%s'\n", colstr);
861 return color.pixel;
862 }
863
864 Bool
865 getrootptr(int *x, int *y) {
866 int di;
867 unsigned int dui;
868 Window dummy;
869
870 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
871 }
872
873 long
874 getstate(Window w) {
875 int format, status;
876 long result = -1;
877 unsigned char *p = NULL;
878 unsigned long n, extra;
879 Atom real;
880
881 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
882 &real, &format, &n, &extra, (unsigned char **)&p);
883 if(status != Success)
884 return -1;
885 if(n != 0)
886 result = *p;
887 XFree(p);
888 return result;
889 }
890
891 Bool
892 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
893 char **list = NULL;
894 int n;
895 XTextProperty name;
896
897 if(!text || size == 0)
898 return False;
899 text[0] = '\0';
900 XGetTextProperty(dpy, w, &name, atom);
901 if(!name.nitems)
902 return False;
903 if(name.encoding == XA_STRING)
904 strncpy(text, (char *)name.value, size - 1);
905 else {
906 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
907 && n > 0 && *list)
908 {
909 strncpy(text, *list, size - 1);
910 XFreeStringList(list);
911 }
912 }
913 text[size - 1] = '\0';
914 XFree(name.value);
915 return True;
916 }
917
918 void
919 grabbuttons(Client *c, Bool focused) {
920 updatenumlockmask();
921 {
922 unsigned int i, j;
923 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
924 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
925 if(focused) {
926 for(i = 0; i < LENGTH(buttons); i++)
927 if(buttons[i].click == ClkClientWin)
928 for(j = 0; j < LENGTH(modifiers); j++)
929 XGrabButton(dpy, buttons[i].button,
930 buttons[i].mask | modifiers[j],
931 c->win, False, BUTTONMASK,
932 GrabModeAsync, GrabModeSync, None, None);
933 }
934 else
935 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
936 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
937 }
938 }
939
940 void
941 grabkeys(void) {
942 updatenumlockmask();
943 {
944 unsigned int i, j;
945 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
946 KeyCode code;
947
948 XUngrabKey(dpy, AnyKey, AnyModifier, root);
949 for(i = 0; i < LENGTH(keys); i++) {
950 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
951 for(j = 0; j < LENGTH(modifiers); j++)
952 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
953 True, GrabModeAsync, GrabModeAsync);
954 }
955 }
956 }
957
958 void
959 initfont(const char *fontstr) {
960 char *def, **missing;
961 int i, n;
962
963 missing = NULL;
964 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
965 if(missing) {
966 while(n--)
967 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
968 XFreeStringList(missing);
969 }
970 if(dc.font.set) {
971 XFontSetExtents *font_extents;
972 XFontStruct **xfonts;
973 char **font_names;
974 dc.font.ascent = dc.font.descent = 0;
975 font_extents = XExtentsOfFontSet(dc.font.set);
976 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
977 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
978 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
979 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
980 xfonts++;
981 }
982 }
983 else {
984 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
985 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
986 die("error, cannot load font: '%s'\n", fontstr);
987 dc.font.ascent = dc.font.xfont->ascent;
988 dc.font.descent = dc.font.xfont->descent;
989 }
990 dc.font.height = dc.font.ascent + dc.font.descent;
991 }
992
993 Bool
994 isprotodel(Client *c) {
995 int i, n;
996 Atom *protocols;
997 Bool ret = False;
998
999 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1000 for(i = 0; !ret && i < n; i++)
1001 if(protocols[i] == wmatom[WMDelete])
1002 ret = True;
1003 XFree(protocols);
1004 }
1005 return ret;
1006 }
1007
1008 void
1009 keypress(XEvent *e) {
1010 unsigned int i;
1011 KeySym keysym;
1012 XKeyEvent *ev;
1013
1014 ev = &e->xkey;
1015 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1016 for(i = 0; i < LENGTH(keys); i++)
1017 if(keysym == keys[i].keysym
1018 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1019 && keys[i].func)
1020 keys[i].func(&(keys[i].arg));
1021 }
1022
1023 void
1024 killclient(const Arg *arg) {
1025 XEvent ev;
1026
1027 if(!selmon->sel)
1028 return;
1029 if(isprotodel(selmon->sel)) {
1030 ev.type = ClientMessage;
1031 ev.xclient.window = selmon->sel->win;
1032 ev.xclient.message_type = wmatom[WMProtocols];
1033 ev.xclient.format = 32;
1034 ev.xclient.data.l[0] = wmatom[WMDelete];
1035 ev.xclient.data.l[1] = CurrentTime;
1036 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1037 }
1038 else
1039 XKillClient(dpy, selmon->sel->win);
1040 }
1041
1042 void
1043 manage(Window w, XWindowAttributes *wa) {
1044 static Client cz;
1045 Client *c, *t = NULL;
1046 Window trans = None;
1047 XWindowChanges wc;
1048
1049 if(!(c = malloc(sizeof(Client))))
1050 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1051 *c = cz;
1052 c->win = w;
1053 if(XGetTransientForHint(dpy, w, &trans))
1054 t = wintoclient(trans);
1055 if(t) {
1056 c->mon = t->mon;
1057 c->tags = t->tags;
1058 }
1059 else {
1060 c->mon = selmon;
1061 applyrules(c);
1062 }
1063 /* geometry */
1064 c->x = wa->x + c->mon->wx;
1065 c->y = wa->y + c->mon->wy;
1066 c->w = wa->width;
1067 c->h = wa->height;
1068 c->oldbw = wa->border_width;
1069 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1070 c->x = c->mon->mx;
1071 c->y = c->mon->my;
1072 c->bw = 0;
1073 }
1074 else {
1075 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1076 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1077 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1078 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1079 c->x = MAX(c->x, c->mon->mx);
1080 /* only fix client y-offset, if the client center might cover the bar */
1081 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1082 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1083 c->bw = borderpx;
1084 }
1085 wc.border_width = c->bw;
1086 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1087 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1088 configure(c); /* propagates border_width, if size doesn't change */
1089 updatesizehints(c);
1090 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1091 grabbuttons(c, False);
1092 updatetitle(c);
1093 if(!c->isfloating)
1094 c->isfloating = trans != None || c->isfixed;
1095 if(c->isfloating)
1096 XRaiseWindow(dpy, c->win);
1097 attach(c);
1098 attachstack(c);
1099 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1100 XMapWindow(dpy, c->win);
1101 setclientstate(c, NormalState);
1102 arrange();
1103 }
1104
1105 void
1106 mappingnotify(XEvent *e) {
1107 XMappingEvent *ev = &e->xmapping;
1108
1109 XRefreshKeyboardMapping(ev);
1110 if(ev->request == MappingKeyboard)
1111 grabkeys();
1112 }
1113
1114 void
1115 maprequest(XEvent *e) {
1116 static XWindowAttributes wa;
1117 XMapRequestEvent *ev = &e->xmaprequest;
1118
1119 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1120 return;
1121 if(wa.override_redirect)
1122 return;
1123 if(!wintoclient(ev->window))
1124 manage(ev->window, &wa);
1125 }
1126
1127 void
1128 monocle(Monitor *m) {
1129 Client *c;
1130
1131 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1132 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1133 }
1134
1135 void
1136 movemouse(const Arg *arg) {
1137 int x, y, ocx, ocy, nx, ny;
1138 Client *c;
1139 Monitor *m;
1140 XEvent ev;
1141
1142 if(!(c = selmon->sel))
1143 return;
1144 restack(selmon);
1145 ocx = c->x;
1146 ocy = c->y;
1147 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1148 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1149 return;
1150 if(!getrootptr(&x, &y))
1151 return;
1152 do {
1153 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1154 switch (ev.type) {
1155 case ConfigureRequest:
1156 case Expose:
1157 case MapRequest:
1158 handler[ev.type](&ev);
1159 break;
1160 case MotionNotify:
1161 nx = ocx + (ev.xmotion.x - x);
1162 ny = ocy + (ev.xmotion.y - y);
1163 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1164 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1165 if(abs(selmon->wx - nx) < snap)
1166 nx = selmon->wx;
1167 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1168 nx = selmon->wx + selmon->ww - WIDTH(c);
1169 if(abs(selmon->wy - ny) < snap)
1170 ny = selmon->wy;
1171 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1172 ny = selmon->wy + selmon->wh - HEIGHT(c);
1173 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1174 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1175 togglefloating(NULL);
1176 }
1177 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1178 resize(c, nx, ny, c->w, c->h, True);
1179 break;
1180 }
1181 }
1182 while(ev.type != ButtonRelease);
1183 XUngrabPointer(dpy, CurrentTime);
1184 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1185 sendmon(c, m);
1186 selmon = m;
1187 focus(NULL);
1188 }
1189 }
1190
1191 Client *
1192 nexttiled(Client *c) {
1193 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1194 return c;
1195 }
1196
1197 Monitor *
1198 ptrtomon(int x, int y) {
1199 Monitor *m;
1200
1201 for(m = mons; m; m = m->next)
1202 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1203 return m;
1204 return selmon;
1205 }
1206
1207 void
1208 propertynotify(XEvent *e) {
1209 Client *c;
1210 Window trans;
1211 XPropertyEvent *ev = &e->xproperty;
1212
1213 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1214 updatestatus();
1215 else if(ev->state == PropertyDelete)
1216 return; /* ignore */
1217 else if((c = wintoclient(ev->window))) {
1218 switch (ev->atom) {
1219 default: break;
1220 case XA_WM_TRANSIENT_FOR:
1221 XGetTransientForHint(dpy, c->win, &trans);
1222 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1223 arrange();
1224 break;
1225 case XA_WM_NORMAL_HINTS:
1226 updatesizehints(c);
1227 break;
1228 case XA_WM_HINTS:
1229 updatewmhints(c);
1230 drawbars();
1231 break;
1232 }
1233 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1234 updatetitle(c);
1235 if(c == selmon->sel)
1236 drawbars();
1237 }
1238 }
1239 }
1240
1241 void
1242 quit(const Arg *arg) {
1243 running = False;
1244 }
1245
1246 void
1247 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1248 XWindowChanges wc;
1249
1250 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1251 c->x = wc.x = x;
1252 c->y = wc.y = y;
1253 c->w = wc.width = w;
1254 c->h = wc.height = h;
1255 wc.border_width = c->bw;
1256 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1257 configure(c);
1258 XSync(dpy, False);
1259 }
1260 }
1261
1262 void
1263 resizemouse(const Arg *arg) {
1264 int ocx, ocy;
1265 int nw, nh;
1266 Client *c;
1267 Monitor *m;
1268 XEvent ev;
1269
1270 if(!(c = selmon->sel))
1271 return;
1272 restack(selmon);
1273 ocx = c->x;
1274 ocy = c->y;
1275 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1276 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1277 return;
1278 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1279 do {
1280 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1281 switch(ev.type) {
1282 case ConfigureRequest:
1283 case Expose:
1284 case MapRequest:
1285 handler[ev.type](&ev);
1286 break;
1287 case MotionNotify:
1288 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1289 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1290 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1291 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1292 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1293 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1294 togglefloating(NULL);
1295 }
1296 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1297 resize(c, c->x, c->y, nw, nh, True);
1298 break;
1299 }
1300 }
1301 while(ev.type != ButtonRelease);
1302 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1303 XUngrabPointer(dpy, CurrentTime);
1304 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1305 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1306 sendmon(c, m);
1307 selmon = m;
1308 focus(NULL);
1309 }
1310 }
1311
1312 void
1313 restack(Monitor *m) {
1314 Client *c;
1315 XEvent ev;
1316 XWindowChanges wc;
1317
1318 drawbars();
1319 if(!m->sel)
1320 return;
1321 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1322 XRaiseWindow(dpy, m->sel->win);
1323 if(m->lt[m->sellt]->arrange) {
1324 wc.stack_mode = Below;
1325 wc.sibling = m->barwin;
1326 for(c = m->stack; c; c = c->snext)
1327 if(!c->isfloating && ISVISIBLE(c)) {
1328 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1329 wc.sibling = c->win;
1330 }
1331 }
1332 XLowerWindow(dpy, m->barwin);
1333 XSync(dpy, False);
1334 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1335 }
1336
1337 void
1338 run(void) {
1339 XEvent ev;
1340
1341 /* main event loop */
1342 XSync(dpy, False);
1343 while(running && !XNextEvent(dpy, &ev))
1344 if(handler[ev.type])
1345 (handler[ev.type])(&ev); /* call handler */
1346 }
1347
1348 void
1349 scan(void) {
1350 unsigned int i, num;
1351 Window d1, d2, *wins = NULL;
1352 XWindowAttributes wa;
1353
1354 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1355 for(i = 0; i < num; i++) {
1356 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1357 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1358 continue;
1359 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1360 manage(wins[i], &wa);
1361 }
1362 for(i = 0; i < num; i++) { /* now the transients */
1363 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1364 continue;
1365 if(XGetTransientForHint(dpy, wins[i], &d1)
1366 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1367 manage(wins[i], &wa);
1368 }
1369 if(wins)
1370 XFree(wins);
1371 }
1372 }
1373
1374 void
1375 sendmon(Client *c, Monitor *m) {
1376 if(c->mon == m)
1377 return;
1378 unfocus(c);
1379 detach(c);
1380 detachstack(c);
1381 c->mon = m;
1382 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1383 attach(c);
1384 attachstack(c);
1385 focus(NULL);
1386 arrange();
1387 }
1388
1389 void
1390 setclientstate(Client *c, long state) {
1391 long data[] = { state, None };
1392
1393 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1394 PropModeReplace, (unsigned char *)data, 2);
1395 }
1396
1397 void
1398 setlayout(const Arg *arg) {
1399 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1400 selmon->sellt ^= 1;
1401 if(arg && arg->v)
1402 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1403 if(selmon->sel)
1404 arrange();
1405 else
1406 drawbars();
1407 }
1408
1409 /* arg > 1.0 will set mfact absolutly */
1410 void
1411 setmfact(const Arg *arg) {
1412 float f;
1413
1414 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1415 return;
1416 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1417 if(f < 0.1 || f > 0.9)
1418 return;
1419 selmon->mfact = f;
1420 arrange();
1421 }
1422
1423 void
1424 setup(void) {
1425 unsigned int i;
1426 int w;
1427 XSetWindowAttributes wa;
1428
1429 /* init screen */
1430 screen = DefaultScreen(dpy);
1431 root = RootWindow(dpy, screen);
1432 initfont(font);
1433 sw = DisplayWidth(dpy, screen);
1434 sh = DisplayHeight(dpy, screen);
1435 bh = dc.h = dc.font.height + 2;
1436 updategeom();
1437 /* init atoms */
1438 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1439 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1440 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1441 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1442 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1443 /* init cursors */
1444 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1445 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1446 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1447 /* init appearance */
1448 dc.norm[ColBorder] = getcolor(normbordercolor);
1449 dc.norm[ColBG] = getcolor(normbgcolor);
1450 dc.norm[ColFG] = getcolor(normfgcolor);
1451 dc.sel[ColBorder] = getcolor(selbordercolor);
1452 dc.sel[ColBG] = getcolor(selbgcolor);
1453 dc.sel[ColFG] = getcolor(selfgcolor);
1454 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1455 dc.gc = XCreateGC(dpy, root, 0, NULL);
1456 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1457 if(!dc.font.set)
1458 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1459 /* init bars */
1460 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1461 w = TEXTW(layouts[i].symbol);
1462 blw = MAX(blw, w);
1463 }
1464 updatebars();
1465 updatestatus();
1466 /* EWMH support per view */
1467 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1468 PropModeReplace, (unsigned char *) netatom, NetLast);
1469 /* select for events */
1470 wa.cursor = cursor[CurNormal];
1471 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1472 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1473 |PropertyChangeMask;
1474 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1475 XSelectInput(dpy, root, wa.event_mask);
1476 grabkeys();
1477 }
1478
1479 void
1480 showhide(Client *c) {
1481 if(!c)
1482 return;
1483 if(ISVISIBLE(c)) { /* show clients top down */
1484 XMoveWindow(dpy, c->win, c->x, c->y);
1485 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1486 resize(c, c->x, c->y, c->w, c->h, False);
1487 showhide(c->snext);
1488 }
1489 else { /* hide clients bottom up */
1490 showhide(c->snext);
1491 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1492 }
1493 }
1494
1495
1496 void
1497 sigchld(int signal) {
1498 while(0 < waitpid(-1, NULL, WNOHANG));
1499 }
1500
1501 void
1502 spawn(const Arg *arg) {
1503 signal(SIGCHLD, sigchld);
1504 if(fork() == 0) {
1505 if(dpy)
1506 close(ConnectionNumber(dpy));
1507 setsid();
1508 execvp(((char **)arg->v)[0], (char **)arg->v);
1509 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1510 perror(" failed");
1511 exit(0);
1512 }
1513 }
1514
1515 void
1516 tag(const Arg *arg) {
1517 if(selmon->sel && arg->ui & TAGMASK) {
1518 selmon->sel->tags = arg->ui & TAGMASK;
1519 arrange();
1520 }
1521 }
1522
1523 void
1524 tagmon(const Arg *arg) {
1525 if(!selmon->sel || !mons->next)
1526 return;
1527 sendmon(selmon->sel, dirtomon(arg->i));
1528 }
1529
1530 int
1531 textnw(const char *text, unsigned int len) {
1532 XRectangle r;
1533
1534 if(dc.font.set) {
1535 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1536 return r.width;
1537 }
1538 return XTextWidth(dc.font.xfont, text, len);
1539 }
1540
1541 void
1542 tile(Monitor *m) {
1543 int x, y, h, w, mw;
1544 unsigned int i, n;
1545 Client *c;
1546
1547 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1548 if(n == 0)
1549 return;
1550 /* master */
1551 c = nexttiled(m->clients);
1552 mw = m->mfact * m->ww;
1553 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1554 if(--n == 0)
1555 return;
1556 /* tile stack */
1557 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1558 y = m->wy;
1559 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1560 h = m->wh / n;
1561 if(h < bh)
1562 h = m->wh;
1563 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1564 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1565 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1566 if(h != m->wh)
1567 y = c->y + HEIGHT(c);
1568 }
1569 }
1570
1571 void
1572 togglebar(const Arg *arg) {
1573 selmon->showbar = !selmon->showbar;
1574 updatebarpos(selmon);
1575 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1576 arrange();
1577 }
1578
1579 void
1580 togglefloating(const Arg *arg) {
1581 if(!selmon->sel)
1582 return;
1583 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1584 if(selmon->sel->isfloating)
1585 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1586 selmon->sel->w, selmon->sel->h, False);
1587 arrange();
1588 }
1589
1590 void
1591 toggletag(const Arg *arg) {
1592 unsigned int mask;
1593
1594 if(!selmon->sel)
1595 return;
1596 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1597 if(mask) {
1598 selmon->sel->tags = mask;
1599 arrange();
1600 }
1601 }
1602
1603 void
1604 toggleview(const Arg *arg) {
1605 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1606
1607 if(mask) {
1608 selmon->tagset[selmon->seltags] = mask;
1609 arrange();
1610 }
1611 }
1612
1613 void
1614 unfocus(Client *c) {
1615 if(!c)
1616 return;
1617 grabbuttons(c, False);
1618 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1619 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1620 }
1621
1622 void
1623 unmanage(Client *c) {
1624 XWindowChanges wc;
1625
1626 wc.border_width = c->oldbw;
1627 /* The server grab construct avoids race conditions. */
1628 XGrabServer(dpy);
1629 XSetErrorHandler(xerrordummy);
1630 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1631 detach(c);
1632 detachstack(c);
1633 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1634 setclientstate(c, WithdrawnState);
1635 free(c);
1636 XSync(dpy, False);
1637 XSetErrorHandler(xerror);
1638 XUngrabServer(dpy);
1639 focus(NULL);
1640 arrange();
1641 }
1642
1643 void
1644 unmapnotify(XEvent *e) {
1645 Client *c;
1646 XUnmapEvent *ev = &e->xunmap;
1647
1648 if((c = wintoclient(ev->window)))
1649 unmanage(c);
1650 }
1651
1652 void
1653 updatebars(void) {
1654 Monitor *m;
1655 XSetWindowAttributes wa;
1656
1657 wa.override_redirect = True;
1658 wa.background_pixmap = ParentRelative;
1659 wa.event_mask = ButtonPressMask|ExposureMask;
1660 for(m = mons; m; m = m->next) {
1661 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1662 CopyFromParent, DefaultVisual(dpy, screen),
1663 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1664 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1665 XMapRaised(dpy, m->barwin);
1666 }
1667 }
1668
1669 void
1670 updatebarpos(Monitor *m) {
1671 m->wy = m->my;
1672 m->wh = m->mh;
1673 if(m->showbar) {
1674 m->wh -= bh;
1675 m->by = m->topbar ? m->wy : m->wy + m->wh;
1676 m->wy = m->topbar ? m->wy + bh : m->wy;
1677 }
1678 else
1679 m->by = -bh;
1680 }
1681
1682 void
1683 updategeom(void) {
1684 int i, n = 1;
1685 Client *c;
1686 Monitor *newmons = NULL, *m, *tm;
1687
1688 #ifdef XINERAMA
1689 XineramaScreenInfo *info = NULL;
1690
1691 if(XineramaIsActive(dpy))
1692 info = XineramaQueryScreens(dpy, &n);
1693 #endif /* XINERAMA */
1694 /* allocate monitor(s) for the new geometry setup */
1695 for(i = 0; i < n; i++) {
1696 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1697 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1698 m->next = newmons;
1699 newmons = m;
1700 }
1701 /* initialise monitor(s) */
1702 #ifdef XINERAMA
1703 if(XineramaIsActive(dpy)) {
1704 for(i = 0, m = newmons; m; m = m->next, i++) {
1705 m->screen_number = info[i].screen_number;
1706 m->mx = m->wx = info[i].x_org;
1707 m->my = m->wy = info[i].y_org;
1708 m->mw = m->ww = info[i].width;
1709 m->mh = m->wh = info[i].height;
1710 }
1711 XFree(info);
1712 }
1713 else
1714 #endif /* XINERAMA */
1715 /* default monitor setup */
1716 {
1717 m->screen_number = 0;
1718 m->mx = m->wx = 0;
1719 m->my = m->wy = 0;
1720 m->mw = m->ww = sw;
1721 m->mh = m->wh = sh;
1722 }
1723 /* bar geometry setup */
1724 for(m = newmons; m; m = m->next) {
1725 m->sel = m->stack = m->clients = NULL;
1726 m->seltags = 0;
1727 m->sellt = 0;
1728 m->tagset[0] = m->tagset[1] = 1;
1729 m->mfact = mfact;
1730 m->showbar = SHOWBAR;
1731 m->topbar = TOPBAR;
1732 m->lt[0] = &layouts[0];
1733 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1734 updatebarpos(m);
1735 }
1736 /* reassign left over clients of disappeared monitors */
1737 for(tm = mons; tm; tm = tm->next)
1738 while(tm->clients) {
1739 c = tm->clients;
1740 tm->clients = c->next;
1741 detachstack(c);
1742 c->mon = newmons;
1743 attach(c);
1744 attachstack(c);
1745 }
1746 /* select focused monitor */
1747 cleanupmons();
1748 selmon = mons = newmons;
1749 selmon = wintomon(root);
1750 }
1751
1752 void
1753 updatenumlockmask(void) {
1754 unsigned int i, j;
1755 XModifierKeymap *modmap;
1756
1757 numlockmask = 0;
1758 modmap = XGetModifierMapping(dpy);
1759 for(i = 0; i < 8; i++)
1760 for(j = 0; j < modmap->max_keypermod; j++)
1761 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1762 == XKeysymToKeycode(dpy, XK_Num_Lock))
1763 numlockmask = (1 << i);
1764 XFreeModifiermap(modmap);
1765 }
1766
1767 void
1768 updatesizehints(Client *c) {
1769 long msize;
1770 XSizeHints size;
1771
1772 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1773 /* size is uninitialized, ensure that size.flags aren't used */
1774 size.flags = PSize;
1775 if(size.flags & PBaseSize) {
1776 c->basew = size.base_width;
1777 c->baseh = size.base_height;
1778 }
1779 else if(size.flags & PMinSize) {
1780 c->basew = size.min_width;
1781 c->baseh = size.min_height;
1782 }
1783 else
1784 c->basew = c->baseh = 0;
1785 if(size.flags & PResizeInc) {
1786 c->incw = size.width_inc;
1787 c->inch = size.height_inc;
1788 }
1789 else
1790 c->incw = c->inch = 0;
1791 if(size.flags & PMaxSize) {
1792 c->maxw = size.max_width;
1793 c->maxh = size.max_height;
1794 }
1795 else
1796 c->maxw = c->maxh = 0;
1797 if(size.flags & PMinSize) {
1798 c->minw = size.min_width;
1799 c->minh = size.min_height;
1800 }
1801 else if(size.flags & PBaseSize) {
1802 c->minw = size.base_width;
1803 c->minh = size.base_height;
1804 }
1805 else
1806 c->minw = c->minh = 0;
1807 if(size.flags & PAspect) {
1808 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1809 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1810 }
1811 else
1812 c->maxa = c->mina = 0.0;
1813 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1814 && c->maxw == c->minw && c->maxh == c->minh);
1815 }
1816
1817 void
1818 updatetitle(Client *c) {
1819 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1820 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1821 }
1822
1823 void
1824 updatestatus(void) {
1825 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1826 strcpy(stext, "dwm-"VERSION);
1827 drawbar(selmon);
1828 }
1829
1830 void
1831 updatewmhints(Client *c) {
1832 XWMHints *wmh;
1833
1834 if((wmh = XGetWMHints(dpy, c->win))) {
1835 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1836 wmh->flags &= ~XUrgencyHint;
1837 XSetWMHints(dpy, c->win, wmh);
1838 }
1839 else
1840 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1841 XFree(wmh);
1842 }
1843 }
1844
1845 void
1846 view(const Arg *arg) {
1847 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1848 return;
1849 selmon->seltags ^= 1; /* toggle sel tagset */
1850 if(arg->ui & TAGMASK)
1851 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1852 arrange();
1853 }
1854
1855 Client *
1856 wintoclient(Window w) {
1857 Client *c;
1858 Monitor *m;
1859
1860 for(m = mons; m; m = m->next)
1861 for(c = m->clients; c; c = c->next)
1862 if(c->win == w)
1863 return c;
1864 return NULL;
1865 }
1866
1867 Monitor *
1868 wintomon(Window w) {
1869 int x, y;
1870 Client *c;
1871 Monitor *m;
1872
1873 if(w == root && getrootptr(&x, &y))
1874 return ptrtomon(x, y);
1875 for(m = mons; m; m = m->next)
1876 if(w == m->barwin)
1877 return m;
1878 if((c = wintoclient(w)))
1879 return c->mon;
1880 return selmon;
1881 }
1882
1883 /* There's no way to check accesses to destroyed windows, thus those cases are
1884 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1885 * default error handler, which may call exit. */
1886 int
1887 xerror(Display *dpy, XErrorEvent *ee) {
1888 if(ee->error_code == BadWindow
1889 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1890 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1891 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1892 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1893 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1894 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1895 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1896 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1897 return 0;
1898 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1899 ee->request_code, ee->error_code);
1900 return xerrorxlib(dpy, ee); /* may call exit */
1901 }
1902
1903 int
1904 xerrordummy(Display *dpy, XErrorEvent *ee) {
1905 return 0;
1906 }
1907
1908 /* Startup Error handler to check if another window manager
1909 * is already running. */
1910 int
1911 xerrorstart(Display *dpy, XErrorEvent *ee) {
1912 otherwm = True;
1913 return -1;
1914 }
1915
1916 void
1917 zoom(const Arg *arg) {
1918 Client *c = selmon->sel;
1919
1920 if(!selmon->lt[selmon->sellt]->arrange
1921 || selmon->lt[selmon->sellt]->arrange == monocle
1922 || (selmon->sel && selmon->sel->isfloating))
1923 return;
1924 if(c == nexttiled(selmon->clients))
1925 if(!c || !(c = nexttiled(c->next)))
1926 return;
1927 detach(c);
1928 attach(c);
1929 focus(c);
1930 arrange();
1931 }
1932
1933 int
1934 main(int argc, char *argv[]) {
1935 if(argc == 2 && !strcmp("-v", argv[1]))
1936 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1937 else if(argc != 1)
1938 die("usage: dwm [-v]\n");
1939 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1940 fputs("warning: no locale support\n", stderr);
1941 if(!(dpy = XOpenDisplay(NULL)))
1942 die("dwm: cannot open display\n");
1943 checkotherwm();
1944 setup();
1945 scan();
1946 run();
1947 cleanup();
1948 XCloseDisplay(dpy);
1949 return 0;
1950 }