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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(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 void drawbar(Monitor *m);
168 static void drawbars(void);
169 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
170 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
171 static void enternotify(XEvent *e);
172 static void expose(XEvent *e);
173 static void focus(Client *c);
174 static void focusin(XEvent *e);
175 static void focusmon(const Arg *arg);
176 static void focusstack(const Arg *arg);
177 static unsigned long getcolor(const char *colstr);
178 static Bool getrootpointer(int *x, int *y);
179 static long getstate(Window w);
180 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
181 static void grabbuttons(Client *c, Bool focused);
182 static void grabkeys(void);
183 static Monitor *idxtomon(unsigned int n);
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 void
625 drawbar(Monitor *m) {
626 int x;
627 unsigned int i, occ = 0, urg = 0;
628 unsigned long *col;
629 Client *c;
630
631 for(c = m->clients; c; c = c->next) {
632 occ |= c->tags;
633 if(c->isurgent)
634 urg |= c->tags;
635 }
636 dc.x = 0;
637 if(mons->next) { /* more than a single monitor */
638 dc.w = TEXTW(monsyms[m->screen_number]);
639 drawtext(monsyms[m->screen_number], selmon == m ? dc.sel : dc.norm, False);
640 dc.x += dc.w;
641 }
642 m->btx = dc.x;
643 for(i = 0; i < LENGTH(tags); i++) {
644 dc.w = TEXTW(tags[i]);
645 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
646 drawtext(tags[i], col, urg & 1 << i);
647 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
648 occ & 1 << i, urg & 1 << i, col);
649 dc.x += dc.w;
650 }
651 if(blw > 0) {
652 dc.w = blw;
653 drawtext(lt[m->sellt]->symbol, dc.norm, False);
654 x = dc.x + dc.w;
655 }
656 else
657 x = dc.x;
658 if(m == selmon) { /* status is only drawn on selected monitor */
659 dc.w = TEXTW(stext);
660 dc.x = m->ww - dc.w;
661 if(dc.x < x) {
662 dc.x = x;
663 dc.w = m->ww - x;
664 }
665 drawtext(stext, dc.norm, False);
666 }
667 else
668 dc.x = m->ww;
669 if((dc.w = dc.x - x) > bh) {
670 dc.x = x;
671 if(m->sel) {
672 col = m == selmon ? dc.sel : dc.norm;
673 drawtext(m->sel->name, col, False);
674 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
675 }
676 else
677 drawtext(NULL, dc.norm, False);
678 }
679 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
680 XSync(dpy, False);
681 }
682
683 void
684 drawbars(void) {
685 Monitor *m;
686
687 for(m = mons; m; m = m->next)
688 drawbar(m);
689 }
690
691 void
692 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
693 int x;
694 XGCValues gcv;
695 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
696
697 gcv.foreground = col[invert ? ColBG : ColFG];
698 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
699 x = (dc.font.ascent + dc.font.descent + 2) / 4;
700 r.x = dc.x + 1;
701 r.y = dc.y + 1;
702 if(filled) {
703 r.width = r.height = x + 1;
704 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
705 }
706 else if(empty) {
707 r.width = r.height = x;
708 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
709 }
710 }
711
712 void
713 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
714 char buf[256];
715 int i, x, y, h, len, olen;
716 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
717
718 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
719 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
720 if(!text)
721 return;
722 olen = strlen(text);
723 h = dc.font.ascent + dc.font.descent;
724 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
725 x = dc.x + (h / 2);
726 /* shorten text if necessary */
727 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
728 if(!len)
729 return;
730 memcpy(buf, text, len);
731 if(len < olen)
732 for(i = len; i && i > len - 3; buf[--i] = '.');
733 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
734 if(dc.font.set)
735 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
736 else
737 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
738 }
739
740 void
741 enternotify(XEvent *e) {
742 Client *c;
743 Monitor *m;
744 XCrossingEvent *ev = &e->xcrossing;
745
746 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
747 return;
748 if((m = wintomon(ev->window)) && m != selmon) {
749 unfocus(selmon->sel);
750 selmon = m;
751 }
752 if((c = wintoclient(ev->window)))
753 focus(c);
754 else
755 focus(NULL);
756 }
757
758 void
759 expose(XEvent *e) {
760 Monitor *m;
761 XExposeEvent *ev = &e->xexpose;
762
763 if(ev->count == 0 && (m = wintomon(ev->window)))
764 drawbar(m);
765 }
766
767 void
768 focus(Client *c) {
769 if(!c || !ISVISIBLE(c))
770 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
771 if(selmon->sel)
772 unfocus(selmon->sel);
773 if(c) {
774 if(c->mon != selmon)
775 selmon = c->mon;
776 if(c->isurgent)
777 clearurgent(c);
778 detachstack(c);
779 attachstack(c);
780 grabbuttons(c, True);
781 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
782 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
783 }
784 else
785 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
786 selmon->sel = c;
787 drawbars();
788 }
789
790 void
791 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
792 XFocusChangeEvent *ev = &e->xfocus;
793
794 if(selmon->sel && ev->window != selmon->sel->win)
795 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
796 }
797
798 void
799 focusmon(const Arg *arg) {
800 Monitor *m;
801
802 if(!(m = idxtomon(arg->ui)) || m == selmon)
803 return;
804 unfocus(selmon->sel);
805 selmon = m;
806 focus(NULL);
807 }
808
809 void
810 focusstack(const Arg *arg) {
811 Client *c = NULL, *i;
812
813 if(!selmon->sel)
814 return;
815 if(arg->i > 0) {
816 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
817 if(!c)
818 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
819 }
820 else {
821 for(i = selmon->clients; i != selmon->sel; i = i->next)
822 if(ISVISIBLE(i))
823 c = i;
824 if(!c)
825 for(; i; i = i->next)
826 if(ISVISIBLE(i))
827 c = i;
828 }
829 if(c) {
830 focus(c);
831 restack(selmon);
832 }
833 }
834
835 unsigned long
836 getcolor(const char *colstr) {
837 Colormap cmap = DefaultColormap(dpy, screen);
838 XColor color;
839
840 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
841 die("error, cannot allocate color '%s'\n", colstr);
842 return color.pixel;
843 }
844
845 Bool
846 getrootpointer(int *x, int *y) {
847 int di;
848 unsigned int dui;
849 Window dummy;
850
851 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
852 }
853
854 long
855 getstate(Window w) {
856 int format, status;
857 long result = -1;
858 unsigned char *p = NULL;
859 unsigned long n, extra;
860 Atom real;
861
862 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
863 &real, &format, &n, &extra, (unsigned char **)&p);
864 if(status != Success)
865 return -1;
866 if(n != 0)
867 result = *p;
868 XFree(p);
869 return result;
870 }
871
872 Bool
873 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
874 char **list = NULL;
875 int n;
876 XTextProperty name;
877
878 if(!text || size == 0)
879 return False;
880 text[0] = '\0';
881 XGetTextProperty(dpy, w, &name, atom);
882 if(!name.nitems)
883 return False;
884 if(name.encoding == XA_STRING)
885 strncpy(text, (char *)name.value, size - 1);
886 else {
887 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
888 && n > 0 && *list) {
889 strncpy(text, *list, size - 1);
890 XFreeStringList(list);
891 }
892 }
893 text[size - 1] = '\0';
894 XFree(name.value);
895 return True;
896 }
897
898 void
899 grabbuttons(Client *c, Bool focused) {
900 updatenumlockmask();
901 {
902 unsigned int i, j;
903 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
904 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
905 if(focused) {
906 for(i = 0; i < LENGTH(buttons); i++)
907 if(buttons[i].click == ClkClientWin)
908 for(j = 0; j < LENGTH(modifiers); j++)
909 XGrabButton(dpy, buttons[i].button,
910 buttons[i].mask | modifiers[j],
911 c->win, False, BUTTONMASK,
912 GrabModeAsync, GrabModeSync, None, None);
913 } else
914 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
915 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
916 }
917 }
918
919 void
920 grabkeys(void) {
921 updatenumlockmask();
922 {
923 unsigned int i, j;
924 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
925 KeyCode code;
926
927 XUngrabKey(dpy, AnyKey, AnyModifier, root);
928 for(i = 0; i < LENGTH(keys); i++) {
929 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
930 for(j = 0; j < LENGTH(modifiers); j++)
931 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
932 True, GrabModeAsync, GrabModeAsync);
933 }
934 }
935 }
936
937 Monitor *
938 idxtomon(unsigned int n) {
939 unsigned int i;
940 Monitor *m;
941
942 for(m = mons, i = 0; m && i != n; m = m->next, i++);
943 return m;
944 }
945
946 void
947 initfont(const char *fontstr) {
948 char *def, **missing;
949 int i, n;
950
951 missing = NULL;
952 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
953 if(missing) {
954 while(n--)
955 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
956 XFreeStringList(missing);
957 }
958 if(dc.font.set) {
959 XFontSetExtents *font_extents;
960 XFontStruct **xfonts;
961 char **font_names;
962 dc.font.ascent = dc.font.descent = 0;
963 font_extents = XExtentsOfFontSet(dc.font.set);
964 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
965 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
966 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
967 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
968 xfonts++;
969 }
970 }
971 else {
972 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
973 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
974 die("error, cannot load font: '%s'\n", fontstr);
975 dc.font.ascent = dc.font.xfont->ascent;
976 dc.font.descent = dc.font.xfont->descent;
977 }
978 dc.font.height = dc.font.ascent + dc.font.descent;
979 }
980
981 Bool
982 isprotodel(Client *c) {
983 int i, n;
984 Atom *protocols;
985 Bool ret = False;
986
987 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
988 for(i = 0; !ret && i < n; i++)
989 if(protocols[i] == wmatom[WMDelete])
990 ret = True;
991 XFree(protocols);
992 }
993 return ret;
994 }
995
996 void
997 keypress(XEvent *e) {
998 unsigned int i;
999 KeySym keysym;
1000 XKeyEvent *ev;
1001
1002 ev = &e->xkey;
1003 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1004 for(i = 0; i < LENGTH(keys); i++)
1005 if(keysym == keys[i].keysym
1006 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1007 && keys[i].func)
1008 keys[i].func(&(keys[i].arg));
1009 }
1010
1011 void
1012 killclient(const Arg *arg) {
1013 XEvent ev;
1014
1015 if(!selmon->sel)
1016 return;
1017 if(isprotodel(selmon->sel)) {
1018 ev.type = ClientMessage;
1019 ev.xclient.window = selmon->sel->win;
1020 ev.xclient.message_type = wmatom[WMProtocols];
1021 ev.xclient.format = 32;
1022 ev.xclient.data.l[0] = wmatom[WMDelete];
1023 ev.xclient.data.l[1] = CurrentTime;
1024 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1025 }
1026 else
1027 XKillClient(dpy, selmon->sel->win);
1028 }
1029
1030 void
1031 manage(Window w, XWindowAttributes *wa) {
1032 static Client cz;
1033 Client *c, *t = NULL;
1034 Window trans = None;
1035 XWindowChanges wc;
1036
1037 if(!(c = malloc(sizeof(Client))))
1038 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1039 *c = cz;
1040 c->win = w;
1041 if(XGetTransientForHint(dpy, w, &trans))
1042 t = wintoclient(trans);
1043 if(t) {
1044 c->mon = t->mon;
1045 c->tags = t->tags;
1046 }
1047 else {
1048 c->mon = selmon;
1049 applyrules(c);
1050 }
1051 /* geometry */
1052 c->x = wa->x + c->mon->wx;
1053 c->y = wa->y + c->mon->wy;
1054 c->w = wa->width;
1055 c->h = wa->height;
1056 c->oldbw = wa->border_width;
1057 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1058 c->x = c->mon->mx;
1059 c->y = c->mon->my;
1060 c->bw = 0;
1061 }
1062 else {
1063 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1064 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1065 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1066 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1067 c->x = MAX(c->x, c->mon->mx);
1068 /* only fix client y-offset, if the client center might cover the bar */
1069 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1070 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1071 c->bw = borderpx;
1072 }
1073 wc.border_width = c->bw;
1074 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1075 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1076 configure(c); /* propagates border_width, if size doesn't change */
1077 updatesizehints(c);
1078 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1079 grabbuttons(c, False);
1080 updatetitle(c);
1081 if(!c->isfloating)
1082 c->isfloating = trans != None || c->isfixed;
1083 if(c->isfloating)
1084 XRaiseWindow(dpy, c->win);
1085 attach(c);
1086 attachstack(c);
1087 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1088 XMapWindow(dpy, c->win);
1089 setclientstate(c, NormalState);
1090 arrange();
1091 }
1092
1093 void
1094 mappingnotify(XEvent *e) {
1095 XMappingEvent *ev = &e->xmapping;
1096
1097 XRefreshKeyboardMapping(ev);
1098 if(ev->request == MappingKeyboard)
1099 grabkeys();
1100 }
1101
1102 void
1103 maprequest(XEvent *e) {
1104 static XWindowAttributes wa;
1105 XMapRequestEvent *ev = &e->xmaprequest;
1106
1107 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1108 return;
1109 if(wa.override_redirect)
1110 return;
1111 if(!wintoclient(ev->window))
1112 manage(ev->window, &wa);
1113 }
1114
1115 void
1116 monocle(Monitor *m) {
1117 Client *c;
1118
1119 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1120 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1121 }
1122
1123 void
1124 movemouse(const Arg *arg) {
1125 int x, y, ocx, ocy, nx, ny;
1126 Client *c;
1127 Monitor *m;
1128 XEvent ev;
1129
1130 if(!(c = selmon->sel))
1131 return;
1132 restack(selmon);
1133 ocx = c->x;
1134 ocy = c->y;
1135 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1136 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1137 return;
1138 if(!getrootpointer(&x, &y))
1139 return;
1140 do {
1141 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1142 switch (ev.type) {
1143 case ConfigureRequest:
1144 case Expose:
1145 case MapRequest:
1146 handler[ev.type](&ev);
1147 break;
1148 case MotionNotify:
1149 nx = ocx + (ev.xmotion.x - x);
1150 ny = ocy + (ev.xmotion.y - y);
1151 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1152 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1153 if(abs(selmon->wx - nx) < snap)
1154 nx = selmon->wx;
1155 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1156 nx = selmon->wx + selmon->ww - WIDTH(c);
1157 if(abs(selmon->wy - ny) < snap)
1158 ny = selmon->wy;
1159 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1160 ny = selmon->wy + selmon->wh - HEIGHT(c);
1161 if(!c->isfloating && lt[selmon->sellt]->arrange
1162 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1163 togglefloating(NULL);
1164 }
1165 if(!lt[selmon->sellt]->arrange || c->isfloating)
1166 resize(c, nx, ny, c->w, c->h, True);
1167 break;
1168 }
1169 }
1170 while(ev.type != ButtonRelease);
1171 XUngrabPointer(dpy, CurrentTime);
1172 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1173 sendmon(c, m);
1174 selmon = m;
1175 focus(NULL);
1176 }
1177 }
1178
1179 Client *
1180 nexttiled(Client *c) {
1181 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1182 return c;
1183 }
1184
1185 Monitor *
1186 pointertomon(int x, int y) {
1187 Monitor *m;
1188
1189 for(m = mons; m; m = m->next)
1190 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1191 return m;
1192 return selmon;
1193 }
1194
1195 void
1196 propertynotify(XEvent *e) {
1197 Client *c;
1198 Window trans;
1199 XPropertyEvent *ev = &e->xproperty;
1200
1201 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1202 updatestatus();
1203 else if(ev->state == PropertyDelete)
1204 return; /* ignore */
1205 else if((c = wintoclient(ev->window))) {
1206 switch (ev->atom) {
1207 default: break;
1208 case XA_WM_TRANSIENT_FOR:
1209 XGetTransientForHint(dpy, c->win, &trans);
1210 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1211 arrange();
1212 break;
1213 case XA_WM_NORMAL_HINTS:
1214 updatesizehints(c);
1215 break;
1216 case XA_WM_HINTS:
1217 updatewmhints(c);
1218 drawbars();
1219 break;
1220 }
1221 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1222 updatetitle(c);
1223 if(c == selmon->sel)
1224 drawbars();
1225 }
1226 }
1227 }
1228
1229 void
1230 quit(const Arg *arg) {
1231 running = False;
1232 }
1233
1234 void
1235 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1236 XWindowChanges wc;
1237
1238 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1239 c->x = wc.x = x;
1240 c->y = wc.y = y;
1241 c->w = wc.width = w;
1242 c->h = wc.height = h;
1243 wc.border_width = c->bw;
1244 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1245 configure(c);
1246 XSync(dpy, False);
1247 }
1248 }
1249
1250 void
1251 resizemouse(const Arg *arg) {
1252 int ocx, ocy;
1253 int nw, nh;
1254 Client *c;
1255 Monitor *m;
1256 XEvent ev;
1257
1258 if(!(c = selmon->sel))
1259 return;
1260 restack(selmon);
1261 ocx = c->x;
1262 ocy = c->y;
1263 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1264 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1265 return;
1266 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1267 do {
1268 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1269 switch(ev.type) {
1270 case ConfigureRequest:
1271 case Expose:
1272 case MapRequest:
1273 handler[ev.type](&ev);
1274 break;
1275 case MotionNotify:
1276 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1277 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1278 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1279 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1280 if(!c->isfloating && lt[selmon->sellt]->arrange
1281 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1282 togglefloating(NULL);
1283 }
1284 if(!lt[selmon->sellt]->arrange || c->isfloating)
1285 resize(c, c->x, c->y, nw, nh, True);
1286 break;
1287 }
1288 }
1289 while(ev.type != ButtonRelease);
1290 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1291 XUngrabPointer(dpy, CurrentTime);
1292 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1293 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1294 sendmon(c, m);
1295 selmon = m;
1296 focus(NULL);
1297 }
1298 }
1299
1300 void
1301 restack(Monitor *m) {
1302 Client *c;
1303 XEvent ev;
1304 XWindowChanges wc;
1305
1306 drawbars();
1307 if(!m->sel)
1308 return;
1309 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1310 XRaiseWindow(dpy, m->sel->win);
1311 if(lt[m->sellt]->arrange) {
1312 wc.stack_mode = Below;
1313 wc.sibling = m->barwin;
1314 for(c = m->stack; c; c = c->snext)
1315 if(!c->isfloating && ISVISIBLE(c)) {
1316 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1317 wc.sibling = c->win;
1318 }
1319 }
1320 XSync(dpy, False);
1321 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1322 }
1323
1324 void
1325 run(void) {
1326 XEvent ev;
1327
1328 /* main event loop */
1329 XSync(dpy, False);
1330 while(running && !XNextEvent(dpy, &ev)) {
1331 if(handler[ev.type])
1332 (handler[ev.type])(&ev); /* call handler */
1333 }
1334 }
1335
1336 void
1337 scan(void) {
1338 unsigned int i, num;
1339 Window d1, d2, *wins = NULL;
1340 XWindowAttributes wa;
1341
1342 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1343 for(i = 0; i < num; i++) {
1344 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1345 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1346 continue;
1347 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1348 manage(wins[i], &wa);
1349 }
1350 for(i = 0; i < num; i++) { /* now the transients */
1351 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1352 continue;
1353 if(XGetTransientForHint(dpy, wins[i], &d1)
1354 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1355 manage(wins[i], &wa);
1356 }
1357 if(wins)
1358 XFree(wins);
1359 }
1360 }
1361
1362 void
1363 sendmon(Client *c, Monitor *m) {
1364 if(c->mon == m)
1365 return;
1366 unfocus(c);
1367 detach(c);
1368 detachstack(c);
1369 c->mon = m;
1370 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1371 attach(c);
1372 attachstack(c);
1373 focus(NULL);
1374 arrange();
1375 }
1376
1377 void
1378 setclientstate(Client *c, long state) {
1379 long data[] = {state, None};
1380
1381 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1382 PropModeReplace, (unsigned char *)data, 2);
1383 }
1384
1385 void
1386 setlayout(const Arg *arg) {
1387 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1388 selmon->sellt ^= 1;
1389 if(arg && arg->v)
1390 lt[selmon->sellt] = (Layout *)arg->v;
1391 if(selmon->sel)
1392 arrange();
1393 else
1394 drawbars();
1395 }
1396
1397 /* arg > 1.0 will set mfact absolutly */
1398 void
1399 setmfact(const Arg *arg) {
1400 float f;
1401
1402 if(!arg || !lt[selmon->sellt]->arrange)
1403 return;
1404 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1405 if(f < 0.1 || f > 0.9)
1406 return;
1407 selmon->mfact = f;
1408 arrange();
1409 }
1410
1411 void
1412 setup(void) {
1413 unsigned int i;
1414 int w;
1415 XSetWindowAttributes wa;
1416
1417 /* init screen */
1418 screen = DefaultScreen(dpy);
1419 root = RootWindow(dpy, screen);
1420 initfont(font);
1421 sw = DisplayWidth(dpy, screen);
1422 sh = DisplayHeight(dpy, screen);
1423 bh = dc.h = dc.font.height + 2;
1424 lt[0] = &layouts[0];
1425 lt[1] = &layouts[1 % LENGTH(layouts)];
1426 updategeom();
1427 /* init atoms */
1428 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1429 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1430 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1431 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1432 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1433 /* init cursors */
1434 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1435 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1436 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1437 /* init appearance */
1438 dc.norm[ColBorder] = getcolor(normbordercolor);
1439 dc.norm[ColBG] = getcolor(normbgcolor);
1440 dc.norm[ColFG] = getcolor(normfgcolor);
1441 dc.sel[ColBorder] = getcolor(selbordercolor);
1442 dc.sel[ColBG] = getcolor(selbgcolor);
1443 dc.sel[ColFG] = getcolor(selfgcolor);
1444 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1445 dc.gc = XCreateGC(dpy, root, 0, NULL);
1446 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1447 if(!dc.font.set)
1448 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1449 /* init bars */
1450 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1451 w = TEXTW(layouts[i].symbol);
1452 blw = MAX(blw, w);
1453 }
1454 updatebars();
1455 updatestatus();
1456 /* EWMH support per view */
1457 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1458 PropModeReplace, (unsigned char *) netatom, NetLast);
1459 /* select for events */
1460 wa.cursor = cursor[CurNormal];
1461 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1462 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1463 |PropertyChangeMask;
1464 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1465 XSelectInput(dpy, root, wa.event_mask);
1466 grabkeys();
1467 }
1468
1469 void
1470 showhide(Client *c) {
1471 if(!c)
1472 return;
1473 if(ISVISIBLE(c)) { /* show clients top down */
1474 XMoveWindow(dpy, c->win, c->x, c->y);
1475 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1476 resize(c, c->x, c->y, c->w, c->h, False);
1477 showhide(c->snext);
1478 }
1479 else { /* hide clients bottom up */
1480 showhide(c->snext);
1481 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1482 }
1483 }
1484
1485
1486 void
1487 sigchld(int signal) {
1488 while(0 < waitpid(-1, NULL, WNOHANG));
1489 }
1490
1491 void
1492 spawn(const Arg *arg) {
1493 signal(SIGCHLD, sigchld);
1494 if(fork() == 0) {
1495 if(dpy)
1496 close(ConnectionNumber(dpy));
1497 setsid();
1498 execvp(((char **)arg->v)[0], (char **)arg->v);
1499 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1500 perror(" failed");
1501 exit(0);
1502 }
1503 }
1504
1505 void
1506 tag(const Arg *arg) {
1507 if(selmon->sel && arg->ui & TAGMASK) {
1508 selmon->sel->tags = arg->ui & TAGMASK;
1509 arrange();
1510 }
1511 }
1512
1513 void
1514 tagmon(const Arg *arg) {
1515 Monitor *m;
1516
1517 if(!selmon->sel || !(m = idxtomon(arg->ui)))
1518 return;
1519 sendmon(selmon->sel, m);
1520 }
1521
1522 int
1523 textnw(const char *text, unsigned int len) {
1524 XRectangle r;
1525
1526 if(dc.font.set) {
1527 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1528 return r.width;
1529 }
1530 return XTextWidth(dc.font.xfont, text, len);
1531 }
1532
1533 void
1534 tile(Monitor *m) {
1535 int x, y, h, w, mw;
1536 unsigned int i, n;
1537 Client *c;
1538
1539 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1540 if(n == 0)
1541 return;
1542 /* master */
1543 c = nexttiled(m->clients);
1544 mw = m->mfact * m->ww;
1545 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1546 if(--n == 0)
1547 return;
1548 /* tile stack */
1549 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1550 y = m->wy;
1551 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1552 h = m->wh / n;
1553 if(h < bh)
1554 h = m->wh;
1555 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1556 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1557 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1558 if(h != m->wh)
1559 y = c->y + HEIGHT(c);
1560 }
1561 }
1562
1563 void
1564 togglebar(const Arg *arg) {
1565 selmon->showbar = !selmon->showbar;
1566 updatebarpos(selmon);
1567 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1568 arrange();
1569 }
1570
1571 void
1572 togglefloating(const Arg *arg) {
1573 if(!selmon->sel)
1574 return;
1575 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1576 if(selmon->sel->isfloating)
1577 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1578 selmon->sel->w, selmon->sel->h, False);
1579 arrange();
1580 }
1581
1582 void
1583 toggletag(const Arg *arg) {
1584 unsigned int mask;
1585
1586 if(!selmon->sel)
1587 return;
1588 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1589 if(mask) {
1590 selmon->sel->tags = mask;
1591 arrange();
1592 }
1593 }
1594
1595 void
1596 toggleview(const Arg *arg) {
1597 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1598
1599 if(mask) {
1600 selmon->tagset[selmon->seltags] = mask;
1601 arrange();
1602 }
1603 }
1604
1605 void
1606 unfocus(Client *c) {
1607 if(!c)
1608 return;
1609 grabbuttons(c, False);
1610 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1611 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1612 }
1613
1614 void
1615 unmanage(Client *c) {
1616 XWindowChanges wc;
1617
1618 wc.border_width = c->oldbw;
1619 /* The server grab construct avoids race conditions. */
1620 XGrabServer(dpy);
1621 XSetErrorHandler(xerrordummy);
1622 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1623 detach(c);
1624 detachstack(c);
1625 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1626 setclientstate(c, WithdrawnState);
1627 free(c);
1628 XSync(dpy, False);
1629 XSetErrorHandler(xerror);
1630 XUngrabServer(dpy);
1631 focus(NULL);
1632 arrange();
1633 }
1634
1635 void
1636 unmapnotify(XEvent *e) {
1637 Client *c;
1638 XUnmapEvent *ev = &e->xunmap;
1639
1640 if((c = wintoclient(ev->window)))
1641 unmanage(c);
1642 }
1643
1644 void
1645 updatebars(void) {
1646 Monitor *m;
1647 XSetWindowAttributes wa;
1648
1649 wa.override_redirect = True;
1650 wa.background_pixmap = ParentRelative;
1651 wa.event_mask = ButtonPressMask|ExposureMask;
1652 for(m = mons; m; m = m->next) {
1653 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1654 CopyFromParent, DefaultVisual(dpy, screen),
1655 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1656 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1657 XMapRaised(dpy, m->barwin);
1658 }
1659 }
1660
1661 void
1662 updatebarpos(Monitor *m) {
1663 m->wy = m->my;
1664 m->wh = m->mh;
1665 if(m->showbar) {
1666 m->wh -= bh;
1667 m->by = m->topbar ? m->wy : m->wy + m->wh;
1668 m->wy = m->topbar ? m->wy + bh : m->wy;
1669 }
1670 else
1671 m->by = -bh;
1672 }
1673
1674 void
1675 updategeom(void) {
1676 int i, n = 1;
1677 Client *c;
1678 Monitor *newmons = NULL, *m, *tm;
1679
1680 #ifdef XINERAMA
1681 XineramaScreenInfo *info = NULL;
1682
1683 if(XineramaIsActive(dpy))
1684 info = XineramaQueryScreens(dpy, &n);
1685 #endif /* XINERAMA */
1686 /* allocate monitor(s) for the new geometry setup */
1687 for(i = 0; i < n; i++) {
1688 m = (Monitor *)malloc(sizeof(Monitor));
1689 m->next = newmons;
1690 newmons = m;
1691 }
1692 /* initialise monitor(s) */
1693 #ifdef XINERAMA
1694 if(XineramaIsActive(dpy)) {
1695 for(i = 0, m = newmons; m; m = m->next, i++) {
1696 m->screen_number = info[i].screen_number;
1697 m->mx = m->wx = info[i].x_org;
1698 m->my = m->wy = info[i].y_org;
1699 m->mw = m->ww = info[i].width;
1700 m->mh = m->wh = info[i].height;
1701 }
1702 XFree(info);
1703 }
1704 else
1705 #endif /* XINERAMA */
1706 /* default monitor setup */
1707 {
1708 m->screen_number = 0;
1709 m->mx = m->wx = 0;
1710 m->my = m->wy = 0;
1711 m->mw = m->ww = sw;
1712 m->mh = m->wh = sh;
1713 }
1714 /* bar geometry setup */
1715 for(m = newmons; m; m = m->next) {
1716 m->sel = m->stack = m->clients = NULL;
1717 m->seltags = 0;
1718 m->sellt = 0;
1719 m->tagset[0] = m->tagset[1] = 1;
1720 m->mfact = mfact;
1721 m->showbar = SHOWBAR;
1722 m->topbar = TOPBAR;
1723 updatebarpos(m);
1724 }
1725 /* reassign left over clients of disappeared monitors */
1726 for(tm = mons; tm; tm = tm->next)
1727 while(tm->clients) {
1728 c = tm->clients;
1729 tm->clients = c->next;
1730 detachstack(c);
1731 c->mon = newmons;
1732 attach(c);
1733 attachstack(c);
1734 }
1735 /* select focused monitor */
1736 cleanupmons();
1737 selmon = mons = newmons;
1738 selmon = wintomon(root);
1739 }
1740
1741 void
1742 updatenumlockmask(void) {
1743 unsigned int i, j;
1744 XModifierKeymap *modmap;
1745
1746 numlockmask = 0;
1747 modmap = XGetModifierMapping(dpy);
1748 for(i = 0; i < 8; i++)
1749 for(j = 0; j < modmap->max_keypermod; j++)
1750 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1751 == XKeysymToKeycode(dpy, XK_Num_Lock))
1752 numlockmask = (1 << i);
1753 XFreeModifiermap(modmap);
1754 }
1755
1756 void
1757 updatesizehints(Client *c) {
1758 long msize;
1759 XSizeHints size;
1760
1761 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1762 /* size is uninitialized, ensure that size.flags aren't used */
1763 size.flags = PSize;
1764 if(size.flags & PBaseSize) {
1765 c->basew = size.base_width;
1766 c->baseh = size.base_height;
1767 }
1768 else if(size.flags & PMinSize) {
1769 c->basew = size.min_width;
1770 c->baseh = size.min_height;
1771 }
1772 else
1773 c->basew = c->baseh = 0;
1774 if(size.flags & PResizeInc) {
1775 c->incw = size.width_inc;
1776 c->inch = size.height_inc;
1777 }
1778 else
1779 c->incw = c->inch = 0;
1780 if(size.flags & PMaxSize) {
1781 c->maxw = size.max_width;
1782 c->maxh = size.max_height;
1783 }
1784 else
1785 c->maxw = c->maxh = 0;
1786 if(size.flags & PMinSize) {
1787 c->minw = size.min_width;
1788 c->minh = size.min_height;
1789 }
1790 else if(size.flags & PBaseSize) {
1791 c->minw = size.base_width;
1792 c->minh = size.base_height;
1793 }
1794 else
1795 c->minw = c->minh = 0;
1796 if(size.flags & PAspect) {
1797 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1798 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1799 }
1800 else
1801 c->maxa = c->mina = 0.0;
1802 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1803 && c->maxw == c->minw && c->maxh == c->minh);
1804 }
1805
1806 void
1807 updatetitle(Client *c) {
1808 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1809 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1810 }
1811
1812 void
1813 updatestatus(void) {
1814 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1815 strcpy(stext, "dwm-"VERSION);
1816 drawbar(selmon);
1817 }
1818
1819 void
1820 updatewmhints(Client *c) {
1821 XWMHints *wmh;
1822
1823 if((wmh = XGetWMHints(dpy, c->win))) {
1824 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1825 wmh->flags &= ~XUrgencyHint;
1826 XSetWMHints(dpy, c->win, wmh);
1827 }
1828 else
1829 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1830 XFree(wmh);
1831 }
1832 }
1833
1834 void
1835 view(const Arg *arg) {
1836 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1837 return;
1838 selmon->seltags ^= 1; /* toggle sel tagset */
1839 if(arg->ui & TAGMASK)
1840 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1841 arrange();
1842 }
1843
1844 Client *
1845 wintoclient(Window w) {
1846 Client *c;
1847 Monitor *m;
1848
1849 for(m = mons; m; m = m->next)
1850 for(c = m->clients; c; c = c->next)
1851 if(c->win == w)
1852 return c;
1853 return NULL;
1854 }
1855
1856 Monitor *
1857 wintomon(Window w) {
1858 int x, y;
1859 Client *c;
1860 Monitor *m;
1861
1862 if(w == root && getrootpointer(&x, &y))
1863 return pointertomon(x, y);
1864 for(m = mons; m; m = m->next)
1865 if(w == m->barwin)
1866 return m;
1867 if((c = wintoclient(w)))
1868 return c->mon;
1869 return selmon;
1870 }
1871
1872 /* There's no way to check accesses to destroyed windows, thus those cases are
1873 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1874 * default error handler, which may call exit. */
1875 int
1876 xerror(Display *dpy, XErrorEvent *ee) {
1877 if(ee->error_code == BadWindow
1878 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1879 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1880 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1881 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1882 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1883 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1884 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1885 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1886 return 0;
1887 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1888 ee->request_code, ee->error_code);
1889 return xerrorxlib(dpy, ee); /* may call exit */
1890 }
1891
1892 int
1893 xerrordummy(Display *dpy, XErrorEvent *ee) {
1894 return 0;
1895 }
1896
1897 /* Startup Error handler to check if another window manager
1898 * is already running. */
1899 int
1900 xerrorstart(Display *dpy, XErrorEvent *ee) {
1901 otherwm = True;
1902 return -1;
1903 }
1904
1905 void
1906 zoom(const Arg *arg) {
1907 Client *c = selmon->sel;
1908
1909 if(!lt[selmon->sellt]->arrange
1910 || lt[selmon->sellt]->arrange == monocle
1911 || (selmon->sel && selmon->sel->isfloating))
1912 return;
1913 if(c == nexttiled(selmon->clients))
1914 if(!c || !(c = nexttiled(c->next)))
1915 return;
1916 detach(c);
1917 attach(c);
1918 focus(c);
1919 arrange();
1920 }
1921
1922 int
1923 main(int argc, char *argv[]) {
1924 if(argc == 2 && !strcmp("-v", argv[1]))
1925 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1926 else if(argc != 1)
1927 die("usage: dwm [-v]\n");
1928 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1929 fputs("warning: no locale support\n", stderr);
1930 if(!(dpy = XOpenDisplay(NULL)))
1931 die("dwm: cannot open display\n");
1932 checkotherwm();
1933 setup();
1934 scan();
1935 run();
1936 cleanup();
1937 XCloseDisplay(dpy);
1938 return 0;
1939 }