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