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