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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 }
632 else {
633 if(selmon == mons)
634 for(m = mons; m->next; m = m->next);
635 else
636 for(m = mons; m->next != selmon; m = m->next);
637 }
638 return m;
639 }
640
641 void
642 drawbar(Monitor *m) {
643 int x;
644 unsigned int i, occ = 0, urg = 0;
645 unsigned long *col;
646 Client *c;
647
648 for(c = m->clients; c; c = c->next) {
649 occ |= c->tags;
650 if(c->isurgent)
651 urg |= c->tags;
652 }
653 dc.x = 0;
654 if(mons->next) { /* more than a single monitor */
655 dc.w = TEXTW(monsyms[m->screen_number]);
656 drawtext(monsyms[m->screen_number], selmon == m ? dc.sel : dc.norm, False);
657 dc.x += dc.w;
658 }
659 m->btx = dc.x;
660 for(i = 0; i < LENGTH(tags); i++) {
661 dc.w = TEXTW(tags[i]);
662 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
663 drawtext(tags[i], col, urg & 1 << i);
664 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
665 occ & 1 << i, urg & 1 << i, col);
666 dc.x += dc.w;
667 }
668 if(blw > 0) {
669 dc.w = blw;
670 drawtext(lt[m->sellt]->symbol, dc.norm, False);
671 x = dc.x + dc.w;
672 }
673 else
674 x = dc.x;
675 if(m == selmon) { /* status is only drawn on selected monitor */
676 dc.w = TEXTW(stext);
677 dc.x = m->ww - dc.w;
678 if(dc.x < x) {
679 dc.x = x;
680 dc.w = m->ww - x;
681 }
682 drawtext(stext, dc.norm, False);
683 }
684 else
685 dc.x = m->ww;
686 if((dc.w = dc.x - x) > bh) {
687 dc.x = x;
688 if(m->sel) {
689 col = m == selmon ? dc.sel : dc.norm;
690 drawtext(m->sel->name, col, False);
691 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
692 }
693 else
694 drawtext(NULL, dc.norm, False);
695 }
696 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
697 XSync(dpy, False);
698 }
699
700 void
701 drawbars(void) {
702 Monitor *m;
703
704 for(m = mons; m; m = m->next)
705 drawbar(m);
706 }
707
708 void
709 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
710 int x;
711 XGCValues gcv;
712 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
713
714 gcv.foreground = col[invert ? ColBG : ColFG];
715 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
716 x = (dc.font.ascent + dc.font.descent + 2) / 4;
717 r.x = dc.x + 1;
718 r.y = dc.y + 1;
719 if(filled) {
720 r.width = r.height = x + 1;
721 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
722 }
723 else if(empty) {
724 r.width = r.height = x;
725 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
726 }
727 }
728
729 void
730 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
731 char buf[256];
732 int i, x, y, h, len, olen;
733 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
734
735 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
736 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
737 if(!text)
738 return;
739 olen = strlen(text);
740 h = dc.font.ascent + dc.font.descent;
741 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
742 x = dc.x + (h / 2);
743 /* shorten text if necessary */
744 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
745 if(!len)
746 return;
747 memcpy(buf, text, len);
748 if(len < olen)
749 for(i = len; i && i > len - 3; buf[--i] = '.');
750 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
751 if(dc.font.set)
752 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
753 else
754 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
755 }
756
757 void
758 enternotify(XEvent *e) {
759 Client *c;
760 Monitor *m;
761 XCrossingEvent *ev = &e->xcrossing;
762
763 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
764 return;
765 if((m = wintomon(ev->window)) && m != selmon) {
766 unfocus(selmon->sel);
767 selmon = m;
768 }
769 if((c = wintoclient(ev->window)))
770 focus(c);
771 else
772 focus(NULL);
773 }
774
775 void
776 expose(XEvent *e) {
777 Monitor *m;
778 XExposeEvent *ev = &e->xexpose;
779
780 if(ev->count == 0 && (m = wintomon(ev->window)))
781 drawbar(m);
782 }
783
784 void
785 focus(Client *c) {
786 if(!c || !ISVISIBLE(c))
787 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
788 if(selmon->sel)
789 unfocus(selmon->sel);
790 if(c) {
791 if(c->mon != selmon)
792 selmon = c->mon;
793 if(c->isurgent)
794 clearurgent(c);
795 detachstack(c);
796 attachstack(c);
797 grabbuttons(c, True);
798 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
799 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
800 }
801 else
802 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
803 selmon->sel = c;
804 drawbars();
805 }
806
807 void
808 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
809 XFocusChangeEvent *ev = &e->xfocus;
810
811 if(selmon->sel && ev->window != selmon->sel->win)
812 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
813 }
814
815 void
816 focusmon(const Arg *arg) {
817 Monitor *m = NULL;
818
819 if(!mons->next)
820 return;
821 m = dirtomon(arg->i);
822 unfocus(selmon->sel);
823 selmon = m;
824 focus(NULL);
825 }
826
827 void
828 focusstack(const Arg *arg) {
829 Client *c = NULL, *i;
830
831 if(!selmon->sel)
832 return;
833 if(arg->i > 0) {
834 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
835 if(!c)
836 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
837 }
838 else {
839 for(i = selmon->clients; i != selmon->sel; i = i->next)
840 if(ISVISIBLE(i))
841 c = i;
842 if(!c)
843 for(; i; i = i->next)
844 if(ISVISIBLE(i))
845 c = i;
846 }
847 if(c) {
848 focus(c);
849 restack(selmon);
850 }
851 }
852
853 unsigned long
854 getcolor(const char *colstr) {
855 Colormap cmap = DefaultColormap(dpy, screen);
856 XColor color;
857
858 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
859 die("error, cannot allocate color '%s'\n", colstr);
860 return color.pixel;
861 }
862
863 Bool
864 getrootpointer(int *x, int *y) {
865 int di;
866 unsigned int dui;
867 Window dummy;
868
869 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
870 }
871
872 long
873 getstate(Window w) {
874 int format, status;
875 long result = -1;
876 unsigned char *p = NULL;
877 unsigned long n, extra;
878 Atom real;
879
880 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
881 &real, &format, &n, &extra, (unsigned char **)&p);
882 if(status != Success)
883 return -1;
884 if(n != 0)
885 result = *p;
886 XFree(p);
887 return result;
888 }
889
890 Bool
891 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
892 char **list = NULL;
893 int n;
894 XTextProperty name;
895
896 if(!text || size == 0)
897 return False;
898 text[0] = '\0';
899 XGetTextProperty(dpy, w, &name, atom);
900 if(!name.nitems)
901 return False;
902 if(name.encoding == XA_STRING)
903 strncpy(text, (char *)name.value, size - 1);
904 else {
905 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
906 && n > 0 && *list) {
907 strncpy(text, *list, size - 1);
908 XFreeStringList(list);
909 }
910 }
911 text[size - 1] = '\0';
912 XFree(name.value);
913 return True;
914 }
915
916 void
917 grabbuttons(Client *c, Bool focused) {
918 updatenumlockmask();
919 {
920 unsigned int i, j;
921 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
922 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
923 if(focused) {
924 for(i = 0; i < LENGTH(buttons); i++)
925 if(buttons[i].click == ClkClientWin)
926 for(j = 0; j < LENGTH(modifiers); j++)
927 XGrabButton(dpy, buttons[i].button,
928 buttons[i].mask | modifiers[j],
929 c->win, False, BUTTONMASK,
930 GrabModeAsync, GrabModeSync, None, None);
931 } else
932 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
933 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
934 }
935 }
936
937 void
938 grabkeys(void) {
939 updatenumlockmask();
940 {
941 unsigned int i, j;
942 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
943 KeyCode code;
944
945 XUngrabKey(dpy, AnyKey, AnyModifier, root);
946 for(i = 0; i < LENGTH(keys); i++) {
947 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
948 for(j = 0; j < LENGTH(modifiers); j++)
949 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
950 True, GrabModeAsync, GrabModeAsync);
951 }
952 }
953 }
954
955 void
956 initfont(const char *fontstr) {
957 char *def, **missing;
958 int i, n;
959
960 missing = NULL;
961 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
962 if(missing) {
963 while(n--)
964 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
965 XFreeStringList(missing);
966 }
967 if(dc.font.set) {
968 XFontSetExtents *font_extents;
969 XFontStruct **xfonts;
970 char **font_names;
971 dc.font.ascent = dc.font.descent = 0;
972 font_extents = XExtentsOfFontSet(dc.font.set);
973 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
974 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
975 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
976 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
977 xfonts++;
978 }
979 }
980 else {
981 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
982 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
983 die("error, cannot load font: '%s'\n", fontstr);
984 dc.font.ascent = dc.font.xfont->ascent;
985 dc.font.descent = dc.font.xfont->descent;
986 }
987 dc.font.height = dc.font.ascent + dc.font.descent;
988 }
989
990 Bool
991 isprotodel(Client *c) {
992 int i, n;
993 Atom *protocols;
994 Bool ret = False;
995
996 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
997 for(i = 0; !ret && i < n; i++)
998 if(protocols[i] == wmatom[WMDelete])
999 ret = True;
1000 XFree(protocols);
1001 }
1002 return ret;
1003 }
1004
1005 void
1006 keypress(XEvent *e) {
1007 unsigned int i;
1008 KeySym keysym;
1009 XKeyEvent *ev;
1010
1011 ev = &e->xkey;
1012 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1013 for(i = 0; i < LENGTH(keys); i++)
1014 if(keysym == keys[i].keysym
1015 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1016 && keys[i].func)
1017 keys[i].func(&(keys[i].arg));
1018 }
1019
1020 void
1021 killclient(const Arg *arg) {
1022 XEvent ev;
1023
1024 if(!selmon->sel)
1025 return;
1026 if(isprotodel(selmon->sel)) {
1027 ev.type = ClientMessage;
1028 ev.xclient.window = selmon->sel->win;
1029 ev.xclient.message_type = wmatom[WMProtocols];
1030 ev.xclient.format = 32;
1031 ev.xclient.data.l[0] = wmatom[WMDelete];
1032 ev.xclient.data.l[1] = CurrentTime;
1033 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1034 }
1035 else
1036 XKillClient(dpy, selmon->sel->win);
1037 }
1038
1039 void
1040 manage(Window w, XWindowAttributes *wa) {
1041 static Client cz;
1042 Client *c, *t = NULL;
1043 Window trans = None;
1044 XWindowChanges wc;
1045
1046 if(!(c = malloc(sizeof(Client))))
1047 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1048 *c = cz;
1049 c->win = w;
1050 if(XGetTransientForHint(dpy, w, &trans))
1051 t = wintoclient(trans);
1052 if(t) {
1053 c->mon = t->mon;
1054 c->tags = t->tags;
1055 }
1056 else {
1057 c->mon = selmon;
1058 applyrules(c);
1059 }
1060 /* geometry */
1061 c->x = wa->x + c->mon->wx;
1062 c->y = wa->y + c->mon->wy;
1063 c->w = wa->width;
1064 c->h = wa->height;
1065 c->oldbw = wa->border_width;
1066 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1067 c->x = c->mon->mx;
1068 c->y = c->mon->my;
1069 c->bw = 0;
1070 }
1071 else {
1072 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1073 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1074 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1075 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1076 c->x = MAX(c->x, c->mon->mx);
1077 /* only fix client y-offset, if the client center might cover the bar */
1078 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1079 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1080 c->bw = borderpx;
1081 }
1082 wc.border_width = c->bw;
1083 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1084 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1085 configure(c); /* propagates border_width, if size doesn't change */
1086 updatesizehints(c);
1087 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1088 grabbuttons(c, False);
1089 updatetitle(c);
1090 if(!c->isfloating)
1091 c->isfloating = trans != None || c->isfixed;
1092 if(c->isfloating)
1093 XRaiseWindow(dpy, c->win);
1094 attach(c);
1095 attachstack(c);
1096 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1097 XMapWindow(dpy, c->win);
1098 setclientstate(c, NormalState);
1099 arrange();
1100 }
1101
1102 void
1103 mappingnotify(XEvent *e) {
1104 XMappingEvent *ev = &e->xmapping;
1105
1106 XRefreshKeyboardMapping(ev);
1107 if(ev->request == MappingKeyboard)
1108 grabkeys();
1109 }
1110
1111 void
1112 maprequest(XEvent *e) {
1113 static XWindowAttributes wa;
1114 XMapRequestEvent *ev = &e->xmaprequest;
1115
1116 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1117 return;
1118 if(wa.override_redirect)
1119 return;
1120 if(!wintoclient(ev->window))
1121 manage(ev->window, &wa);
1122 }
1123
1124 void
1125 monocle(Monitor *m) {
1126 Client *c;
1127
1128 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1129 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1130 }
1131
1132 void
1133 movemouse(const Arg *arg) {
1134 int x, y, ocx, ocy, nx, ny;
1135 Client *c;
1136 Monitor *m;
1137 XEvent ev;
1138
1139 if(!(c = selmon->sel))
1140 return;
1141 restack(selmon);
1142 ocx = c->x;
1143 ocy = c->y;
1144 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1145 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1146 return;
1147 if(!getrootpointer(&x, &y))
1148 return;
1149 do {
1150 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1151 switch (ev.type) {
1152 case ConfigureRequest:
1153 case Expose:
1154 case MapRequest:
1155 handler[ev.type](&ev);
1156 break;
1157 case MotionNotify:
1158 nx = ocx + (ev.xmotion.x - x);
1159 ny = ocy + (ev.xmotion.y - y);
1160 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1161 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1162 if(abs(selmon->wx - nx) < snap)
1163 nx = selmon->wx;
1164 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1165 nx = selmon->wx + selmon->ww - WIDTH(c);
1166 if(abs(selmon->wy - ny) < snap)
1167 ny = selmon->wy;
1168 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1169 ny = selmon->wy + selmon->wh - HEIGHT(c);
1170 if(!c->isfloating && lt[selmon->sellt]->arrange
1171 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1172 togglefloating(NULL);
1173 }
1174 if(!lt[selmon->sellt]->arrange || c->isfloating)
1175 resize(c, nx, ny, c->w, c->h, True);
1176 break;
1177 }
1178 }
1179 while(ev.type != ButtonRelease);
1180 XUngrabPointer(dpy, CurrentTime);
1181 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1182 sendmon(c, m);
1183 selmon = m;
1184 focus(NULL);
1185 }
1186 }
1187
1188 Client *
1189 nexttiled(Client *c) {
1190 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1191 return c;
1192 }
1193
1194 Monitor *
1195 pointertomon(int x, int y) {
1196 Monitor *m;
1197
1198 for(m = mons; m; m = m->next)
1199 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1200 return m;
1201 return selmon;
1202 }
1203
1204 void
1205 propertynotify(XEvent *e) {
1206 Client *c;
1207 Window trans;
1208 XPropertyEvent *ev = &e->xproperty;
1209
1210 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1211 updatestatus();
1212 else if(ev->state == PropertyDelete)
1213 return; /* ignore */
1214 else if((c = wintoclient(ev->window))) {
1215 switch (ev->atom) {
1216 default: break;
1217 case XA_WM_TRANSIENT_FOR:
1218 XGetTransientForHint(dpy, c->win, &trans);
1219 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1220 arrange();
1221 break;
1222 case XA_WM_NORMAL_HINTS:
1223 updatesizehints(c);
1224 break;
1225 case XA_WM_HINTS:
1226 updatewmhints(c);
1227 drawbars();
1228 break;
1229 }
1230 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1231 updatetitle(c);
1232 if(c == selmon->sel)
1233 drawbars();
1234 }
1235 }
1236 }
1237
1238 void
1239 quit(const Arg *arg) {
1240 running = False;
1241 }
1242
1243 void
1244 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1245 XWindowChanges wc;
1246
1247 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1248 c->x = wc.x = x;
1249 c->y = wc.y = y;
1250 c->w = wc.width = w;
1251 c->h = wc.height = h;
1252 wc.border_width = c->bw;
1253 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1254 configure(c);
1255 XSync(dpy, False);
1256 }
1257 }
1258
1259 void
1260 resizemouse(const Arg *arg) {
1261 int ocx, ocy;
1262 int nw, nh;
1263 Client *c;
1264 Monitor *m;
1265 XEvent ev;
1266
1267 if(!(c = selmon->sel))
1268 return;
1269 restack(selmon);
1270 ocx = c->x;
1271 ocy = c->y;
1272 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1273 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1274 return;
1275 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1276 do {
1277 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1278 switch(ev.type) {
1279 case ConfigureRequest:
1280 case Expose:
1281 case MapRequest:
1282 handler[ev.type](&ev);
1283 break;
1284 case MotionNotify:
1285 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1286 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1287 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1288 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1289 if(!c->isfloating && lt[selmon->sellt]->arrange
1290 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1291 togglefloating(NULL);
1292 }
1293 if(!lt[selmon->sellt]->arrange || c->isfloating)
1294 resize(c, c->x, c->y, nw, nh, True);
1295 break;
1296 }
1297 }
1298 while(ev.type != ButtonRelease);
1299 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1300 XUngrabPointer(dpy, CurrentTime);
1301 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1302 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1303 sendmon(c, m);
1304 selmon = m;
1305 focus(NULL);
1306 }
1307 }
1308
1309 void
1310 restack(Monitor *m) {
1311 Client *c;
1312 XEvent ev;
1313 XWindowChanges wc;
1314
1315 drawbars();
1316 if(!m->sel)
1317 return;
1318 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1319 XRaiseWindow(dpy, m->sel->win);
1320 if(lt[m->sellt]->arrange) {
1321 wc.stack_mode = Below;
1322 wc.sibling = m->barwin;
1323 for(c = m->stack; c; c = c->snext)
1324 if(!c->isfloating && ISVISIBLE(c)) {
1325 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1326 wc.sibling = c->win;
1327 }
1328 }
1329 XSync(dpy, False);
1330 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1331 }
1332
1333 void
1334 run(void) {
1335 XEvent ev;
1336
1337 /* main event loop */
1338 XSync(dpy, False);
1339 while(running && !XNextEvent(dpy, &ev)) {
1340 if(handler[ev.type])
1341 (handler[ev.type])(&ev); /* call handler */
1342 }
1343 }
1344
1345 void
1346 scan(void) {
1347 unsigned int i, num;
1348 Window d1, d2, *wins = NULL;
1349 XWindowAttributes wa;
1350
1351 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1352 for(i = 0; i < num; i++) {
1353 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1354 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1355 continue;
1356 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1357 manage(wins[i], &wa);
1358 }
1359 for(i = 0; i < num; i++) { /* now the transients */
1360 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1361 continue;
1362 if(XGetTransientForHint(dpy, wins[i], &d1)
1363 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1364 manage(wins[i], &wa);
1365 }
1366 if(wins)
1367 XFree(wins);
1368 }
1369 }
1370
1371 void
1372 sendmon(Client *c, Monitor *m) {
1373 if(c->mon == m)
1374 return;
1375 unfocus(c);
1376 detach(c);
1377 detachstack(c);
1378 c->mon = m;
1379 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1380 attach(c);
1381 attachstack(c);
1382 focus(NULL);
1383 arrange();
1384 }
1385
1386 void
1387 setclientstate(Client *c, long state) {
1388 long data[] = {state, None};
1389
1390 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1391 PropModeReplace, (unsigned char *)data, 2);
1392 }
1393
1394 void
1395 setlayout(const Arg *arg) {
1396 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1397 selmon->sellt ^= 1;
1398 if(arg && arg->v)
1399 lt[selmon->sellt] = (Layout *)arg->v;
1400 if(selmon->sel)
1401 arrange();
1402 else
1403 drawbars();
1404 }
1405
1406 /* arg > 1.0 will set mfact absolutly */
1407 void
1408 setmfact(const Arg *arg) {
1409 float f;
1410
1411 if(!arg || !lt[selmon->sellt]->arrange)
1412 return;
1413 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1414 if(f < 0.1 || f > 0.9)
1415 return;
1416 selmon->mfact = f;
1417 arrange();
1418 }
1419
1420 void
1421 setup(void) {
1422 unsigned int i;
1423 int w;
1424 XSetWindowAttributes wa;
1425
1426 /* init screen */
1427 screen = DefaultScreen(dpy);
1428 root = RootWindow(dpy, screen);
1429 initfont(font);
1430 sw = DisplayWidth(dpy, screen);
1431 sh = DisplayHeight(dpy, screen);
1432 bh = dc.h = dc.font.height + 2;
1433 lt[0] = &layouts[0];
1434 lt[1] = &layouts[1 % LENGTH(layouts)];
1435 updategeom();
1436 /* init atoms */
1437 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1438 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1439 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1440 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1441 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1442 /* init cursors */
1443 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1444 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1445 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1446 /* init appearance */
1447 dc.norm[ColBorder] = getcolor(normbordercolor);
1448 dc.norm[ColBG] = getcolor(normbgcolor);
1449 dc.norm[ColFG] = getcolor(normfgcolor);
1450 dc.sel[ColBorder] = getcolor(selbordercolor);
1451 dc.sel[ColBG] = getcolor(selbgcolor);
1452 dc.sel[ColFG] = getcolor(selfgcolor);
1453 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1454 dc.gc = XCreateGC(dpy, root, 0, NULL);
1455 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1456 if(!dc.font.set)
1457 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1458 /* init bars */
1459 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1460 w = TEXTW(layouts[i].symbol);
1461 blw = MAX(blw, w);
1462 }
1463 updatebars();
1464 updatestatus();
1465 /* EWMH support per view */
1466 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1467 PropModeReplace, (unsigned char *) netatom, NetLast);
1468 /* select for events */
1469 wa.cursor = cursor[CurNormal];
1470 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1471 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1472 |PropertyChangeMask;
1473 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1474 XSelectInput(dpy, root, wa.event_mask);
1475 grabkeys();
1476 }
1477
1478 void
1479 showhide(Client *c) {
1480 if(!c)
1481 return;
1482 if(ISVISIBLE(c)) { /* show clients top down */
1483 XMoveWindow(dpy, c->win, c->x, c->y);
1484 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1485 resize(c, c->x, c->y, c->w, c->h, False);
1486 showhide(c->snext);
1487 }
1488 else { /* hide clients bottom up */
1489 showhide(c->snext);
1490 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1491 }
1492 }
1493
1494
1495 void
1496 sigchld(int signal) {
1497 while(0 < waitpid(-1, NULL, WNOHANG));
1498 }
1499
1500 void
1501 spawn(const Arg *arg) {
1502 signal(SIGCHLD, sigchld);
1503 if(fork() == 0) {
1504 if(dpy)
1505 close(ConnectionNumber(dpy));
1506 setsid();
1507 execvp(((char **)arg->v)[0], (char **)arg->v);
1508 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1509 perror(" failed");
1510 exit(0);
1511 }
1512 }
1513
1514 void
1515 tag(const Arg *arg) {
1516 if(selmon->sel && arg->ui & TAGMASK) {
1517 selmon->sel->tags = arg->ui & TAGMASK;
1518 arrange();
1519 }
1520 }
1521
1522 void
1523 tagmon(const Arg *arg) {
1524 if(!selmon->sel || !mons->next)
1525 return;
1526 sendmon(selmon->sel, dirtomon(arg->i));
1527 }
1528
1529 int
1530 textnw(const char *text, unsigned int len) {
1531 XRectangle r;
1532
1533 if(dc.font.set) {
1534 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1535 return r.width;
1536 }
1537 return XTextWidth(dc.font.xfont, text, len);
1538 }
1539
1540 void
1541 tile(Monitor *m) {
1542 int x, y, h, w, mw;
1543 unsigned int i, n;
1544 Client *c;
1545
1546 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1547 if(n == 0)
1548 return;
1549 /* master */
1550 c = nexttiled(m->clients);
1551 mw = m->mfact * m->ww;
1552 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1553 if(--n == 0)
1554 return;
1555 /* tile stack */
1556 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1557 y = m->wy;
1558 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1559 h = m->wh / n;
1560 if(h < bh)
1561 h = m->wh;
1562 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1563 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1564 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1565 if(h != m->wh)
1566 y = c->y + HEIGHT(c);
1567 }
1568 }
1569
1570 void
1571 togglebar(const Arg *arg) {
1572 selmon->showbar = !selmon->showbar;
1573 updatebarpos(selmon);
1574 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1575 arrange();
1576 }
1577
1578 void
1579 togglefloating(const Arg *arg) {
1580 if(!selmon->sel)
1581 return;
1582 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1583 if(selmon->sel->isfloating)
1584 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1585 selmon->sel->w, selmon->sel->h, False);
1586 arrange();
1587 }
1588
1589 void
1590 toggletag(const Arg *arg) {
1591 unsigned int mask;
1592
1593 if(!selmon->sel)
1594 return;
1595 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1596 if(mask) {
1597 selmon->sel->tags = mask;
1598 arrange();
1599 }
1600 }
1601
1602 void
1603 toggleview(const Arg *arg) {
1604 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1605
1606 if(mask) {
1607 selmon->tagset[selmon->seltags] = mask;
1608 arrange();
1609 }
1610 }
1611
1612 void
1613 unfocus(Client *c) {
1614 if(!c)
1615 return;
1616 grabbuttons(c, False);
1617 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1618 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1619 }
1620
1621 void
1622 unmanage(Client *c) {
1623 XWindowChanges wc;
1624
1625 wc.border_width = c->oldbw;
1626 /* The server grab construct avoids race conditions. */
1627 XGrabServer(dpy);
1628 XSetErrorHandler(xerrordummy);
1629 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1630 detach(c);
1631 detachstack(c);
1632 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1633 setclientstate(c, WithdrawnState);
1634 free(c);
1635 XSync(dpy, False);
1636 XSetErrorHandler(xerror);
1637 XUngrabServer(dpy);
1638 focus(NULL);
1639 arrange();
1640 }
1641
1642 void
1643 unmapnotify(XEvent *e) {
1644 Client *c;
1645 XUnmapEvent *ev = &e->xunmap;
1646
1647 if((c = wintoclient(ev->window)))
1648 unmanage(c);
1649 }
1650
1651 void
1652 updatebars(void) {
1653 Monitor *m;
1654 XSetWindowAttributes wa;
1655
1656 wa.override_redirect = True;
1657 wa.background_pixmap = ParentRelative;
1658 wa.event_mask = ButtonPressMask|ExposureMask;
1659 for(m = mons; m; m = m->next) {
1660 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1661 CopyFromParent, DefaultVisual(dpy, screen),
1662 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1663 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1664 XMapRaised(dpy, m->barwin);
1665 }
1666 }
1667
1668 void
1669 updatebarpos(Monitor *m) {
1670 m->wy = m->my;
1671 m->wh = m->mh;
1672 if(m->showbar) {
1673 m->wh -= bh;
1674 m->by = m->topbar ? m->wy : m->wy + m->wh;
1675 m->wy = m->topbar ? m->wy + bh : m->wy;
1676 }
1677 else
1678 m->by = -bh;
1679 }
1680
1681 void
1682 updategeom(void) {
1683 int i, n = 1;
1684 Client *c;
1685 Monitor *newmons = NULL, *m, *tm;
1686
1687 #ifdef XINERAMA
1688 XineramaScreenInfo *info = NULL;
1689
1690 if(XineramaIsActive(dpy))
1691 info = XineramaQueryScreens(dpy, &n);
1692 #endif /* XINERAMA */
1693 /* allocate monitor(s) for the new geometry setup */
1694 for(i = 0; i < n; i++) {
1695 m = (Monitor *)malloc(sizeof(Monitor));
1696 m->next = newmons;
1697 newmons = m;
1698 }
1699 /* initialise monitor(s) */
1700 #ifdef XINERAMA
1701 if(XineramaIsActive(dpy)) {
1702 for(i = 0, m = newmons; m; m = m->next, i++) {
1703 m->screen_number = info[i].screen_number;
1704 m->mx = m->wx = info[i].x_org;
1705 m->my = m->wy = info[i].y_org;
1706 m->mw = m->ww = info[i].width;
1707 m->mh = m->wh = info[i].height;
1708 }
1709 XFree(info);
1710 }
1711 else
1712 #endif /* XINERAMA */
1713 /* default monitor setup */
1714 {
1715 m->screen_number = 0;
1716 m->mx = m->wx = 0;
1717 m->my = m->wy = 0;
1718 m->mw = m->ww = sw;
1719 m->mh = m->wh = sh;
1720 }
1721 /* bar geometry setup */
1722 for(m = newmons; m; m = m->next) {
1723 m->sel = m->stack = m->clients = NULL;
1724 m->seltags = 0;
1725 m->sellt = 0;
1726 m->tagset[0] = m->tagset[1] = 1;
1727 m->mfact = mfact;
1728 m->showbar = SHOWBAR;
1729 m->topbar = TOPBAR;
1730 updatebarpos(m);
1731 }
1732 /* reassign left over clients of disappeared monitors */
1733 for(tm = mons; tm; tm = tm->next)
1734 while(tm->clients) {
1735 c = tm->clients;
1736 tm->clients = c->next;
1737 detachstack(c);
1738 c->mon = newmons;
1739 attach(c);
1740 attachstack(c);
1741 }
1742 /* select focused monitor */
1743 cleanupmons();
1744 selmon = mons = newmons;
1745 selmon = wintomon(root);
1746 }
1747
1748 void
1749 updatenumlockmask(void) {
1750 unsigned int i, j;
1751 XModifierKeymap *modmap;
1752
1753 numlockmask = 0;
1754 modmap = XGetModifierMapping(dpy);
1755 for(i = 0; i < 8; i++)
1756 for(j = 0; j < modmap->max_keypermod; j++)
1757 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1758 == XKeysymToKeycode(dpy, XK_Num_Lock))
1759 numlockmask = (1 << i);
1760 XFreeModifiermap(modmap);
1761 }
1762
1763 void
1764 updatesizehints(Client *c) {
1765 long msize;
1766 XSizeHints size;
1767
1768 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1769 /* size is uninitialized, ensure that size.flags aren't used */
1770 size.flags = PSize;
1771 if(size.flags & PBaseSize) {
1772 c->basew = size.base_width;
1773 c->baseh = size.base_height;
1774 }
1775 else if(size.flags & PMinSize) {
1776 c->basew = size.min_width;
1777 c->baseh = size.min_height;
1778 }
1779 else
1780 c->basew = c->baseh = 0;
1781 if(size.flags & PResizeInc) {
1782 c->incw = size.width_inc;
1783 c->inch = size.height_inc;
1784 }
1785 else
1786 c->incw = c->inch = 0;
1787 if(size.flags & PMaxSize) {
1788 c->maxw = size.max_width;
1789 c->maxh = size.max_height;
1790 }
1791 else
1792 c->maxw = c->maxh = 0;
1793 if(size.flags & PMinSize) {
1794 c->minw = size.min_width;
1795 c->minh = size.min_height;
1796 }
1797 else if(size.flags & PBaseSize) {
1798 c->minw = size.base_width;
1799 c->minh = size.base_height;
1800 }
1801 else
1802 c->minw = c->minh = 0;
1803 if(size.flags & PAspect) {
1804 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1805 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1806 }
1807 else
1808 c->maxa = c->mina = 0.0;
1809 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1810 && c->maxw == c->minw && c->maxh == c->minh);
1811 }
1812
1813 void
1814 updatetitle(Client *c) {
1815 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1816 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1817 }
1818
1819 void
1820 updatestatus(void) {
1821 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1822 strcpy(stext, "dwm-"VERSION);
1823 drawbar(selmon);
1824 }
1825
1826 void
1827 updatewmhints(Client *c) {
1828 XWMHints *wmh;
1829
1830 if((wmh = XGetWMHints(dpy, c->win))) {
1831 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1832 wmh->flags &= ~XUrgencyHint;
1833 XSetWMHints(dpy, c->win, wmh);
1834 }
1835 else
1836 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1837 XFree(wmh);
1838 }
1839 }
1840
1841 void
1842 view(const Arg *arg) {
1843 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1844 return;
1845 selmon->seltags ^= 1; /* toggle sel tagset */
1846 if(arg->ui & TAGMASK)
1847 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1848 arrange();
1849 }
1850
1851 Client *
1852 wintoclient(Window w) {
1853 Client *c;
1854 Monitor *m;
1855
1856 for(m = mons; m; m = m->next)
1857 for(c = m->clients; c; c = c->next)
1858 if(c->win == w)
1859 return c;
1860 return NULL;
1861 }
1862
1863 Monitor *
1864 wintomon(Window w) {
1865 int x, y;
1866 Client *c;
1867 Monitor *m;
1868
1869 if(w == root && getrootpointer(&x, &y))
1870 return pointertomon(x, y);
1871 for(m = mons; m; m = m->next)
1872 if(w == m->barwin)
1873 return m;
1874 if((c = wintoclient(w)))
1875 return c->mon;
1876 return selmon;
1877 }
1878
1879 /* There's no way to check accesses to destroyed windows, thus those cases are
1880 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1881 * default error handler, which may call exit. */
1882 int
1883 xerror(Display *dpy, XErrorEvent *ee) {
1884 if(ee->error_code == BadWindow
1885 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1886 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1887 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1888 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1889 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1890 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1891 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1892 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1893 return 0;
1894 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1895 ee->request_code, ee->error_code);
1896 return xerrorxlib(dpy, ee); /* may call exit */
1897 }
1898
1899 int
1900 xerrordummy(Display *dpy, XErrorEvent *ee) {
1901 return 0;
1902 }
1903
1904 /* Startup Error handler to check if another window manager
1905 * is already running. */
1906 int
1907 xerrorstart(Display *dpy, XErrorEvent *ee) {
1908 otherwm = True;
1909 return -1;
1910 }
1911
1912 void
1913 zoom(const Arg *arg) {
1914 Client *c = selmon->sel;
1915
1916 if(!lt[selmon->sellt]->arrange
1917 || lt[selmon->sellt]->arrange == monocle
1918 || (selmon->sel && selmon->sel->isfloating))
1919 return;
1920 if(c == nexttiled(selmon->clients))
1921 if(!c || !(c = nexttiled(c->next)))
1922 return;
1923 detach(c);
1924 attach(c);
1925 focus(c);
1926 arrange();
1927 }
1928
1929 int
1930 main(int argc, char *argv[]) {
1931 if(argc == 2 && !strcmp("-v", argv[1]))
1932 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1933 else if(argc != 1)
1934 die("usage: dwm [-v]\n");
1935 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1936 fputs("warning: no locale support\n", stderr);
1937 if(!(dpy = XOpenDisplay(NULL)))
1938 die("dwm: cannot open display\n");
1939 checkotherwm();
1940 setup();
1941 scan();
1942 run();
1943 cleanup();
1944 XCloseDisplay(dpy);
1945 return 0;
1946 }