dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23#include <errno.h>
24#include <locale.h>
25#include <stdarg.h>
26#include <signal.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <unistd.h>
31#include <sys/types.h>
32#include <sys/wait.h>
33#include <X11/cursorfont.h>
34#include <X11/keysym.h>
35#include <X11/Xatom.h>
36#include <X11/Xlib.h>
37#include <X11/Xproto.h>
38#include <X11/Xutil.h>
39#ifdef XINERAMA
40#include <X11/extensions/Xinerama.h>
41#endif /* XINERAMA */
42
43/* macros */
44#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47#define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48#define LENGTH(X) (sizeof X / sizeof X[0])
49#define MAX(A, B) ((A) > (B) ? (A) : (B))
50#define MIN(A, B) ((A) < (B) ? (A) : (B))
51#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52#define WIDTH(X) ((X)->w + 2 * (X)->bw)
53#define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54#define TAGMASK ((int)((1 << LENGTH(tags)) - 1))
55#define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57/* enums */
58enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 const void *v;
70} Arg;
71
72typedef 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
80typedef struct Monitor Monitor;
81typedef struct Client Client;
82struct 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
96typedef 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
111typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116} Key;
117
118typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121} Layout;
122
123struct Monitor {
124 float mfact;
125 int num;
126 int by; /* 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 const Layout *lt[2];
140};
141
142typedef struct {
143 const char *class;
144 const char *instance;
145 const char *title;
146 unsigned int tags;
147 Bool isfloating;
148 int monitor;
149} Rule;
150
151/* function declarations */
152static void applyrules(Client *c);
153static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
154static void arrange(void);
155static void attach(Client *c);
156static void attachstack(Client *c);
157static void buttonpress(XEvent *e);
158static void checkotherwm(void);
159static void cleanup(void);
160static void cleanupmons(void);
161static void clearurgent(Client *c);
162static void configure(Client *c);
163static void configurenotify(XEvent *e);
164static void configurerequest(XEvent *e);
165static void destroynotify(XEvent *e);
166static void detach(Client *c);
167static void detachstack(Client *c);
168static void die(const char *errstr, ...);
169static Monitor *dirtomon(int dir);
170static void drawbar(Monitor *m);
171static void drawbars(void);
172static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
173static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
174static void enternotify(XEvent *e);
175static void expose(XEvent *e);
176static void focus(Client *c);
177static void focusin(XEvent *e);
178static void focusmon(const Arg *arg);
179static void focusstack(const Arg *arg);
180static unsigned long getcolor(const char *colstr);
181static Bool getrootptr(int *x, int *y);
182static long getstate(Window w);
183static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
184static void grabbuttons(Client *c, Bool focused);
185static void grabkeys(void);
186static void initfont(const char *fontstr);
187static Bool isprotodel(Client *c);
188static void keypress(XEvent *e);
189static void killclient(const Arg *arg);
190static void manage(Window w, XWindowAttributes *wa);
191static void mappingnotify(XEvent *e);
192static void maprequest(XEvent *e);
193static void monocle(Monitor *m);
194static void movemouse(const Arg *arg);
195static Client *nexttiled(Client *c);
196static Monitor *ptrtomon(int x, int y);
197static void propertynotify(XEvent *e);
198static void quit(const Arg *arg);
199static void resize(Client *c, int x, int y, int w, int h, Bool interact);
200static void resizemouse(const Arg *arg);
201static void restack(Monitor *m);
202static void run(void);
203static void scan(void);
204static void sendmon(Client *c, Monitor *m);
205static void setclientstate(Client *c, long state);
206static void setlayout(const Arg *arg);
207static void setmfact(const Arg *arg);
208static void setup(void);
209static void showhide(Client *c);
210static void sigchld(int signal);
211static void spawn(const Arg *arg);
212static void tag(const Arg *arg);
213static void tagmon(const Arg *arg);
214static int textnw(const char *text, unsigned int len);
215static void tile(Monitor *);
216static void togglebar(const Arg *arg);
217static void togglefloating(const Arg *arg);
218static void toggletag(const Arg *arg);
219static void toggleview(const Arg *arg);
220static void unfocus(Client *c);
221static void unmanage(Client *c);
222static void unmapnotify(XEvent *e);
223static void updategeom(void);
224static void updatebarpos(Monitor *m);
225static void updatebars(void);
226static void updatenumlockmask(void);
227static void updatesizehints(Client *c);
228static void updatestatus(void);
229static void updatetitle(Client *c);
230static void updatewmhints(Client *c);
231static void view(const Arg *arg);
232static Client *wintoclient(Window w);
233static Monitor *wintomon(Window w);
234static int xerror(Display *dpy, XErrorEvent *ee);
235static int xerrordummy(Display *dpy, XErrorEvent *ee);
236static int xerrorstart(Display *dpy, XErrorEvent *ee);
237static void zoom(const Arg *arg);
238
239/* variables */
240static const char broken[] = "broken";
241static char stext[256], ntext[8];
242static int screen;
243static int sw, sh; /* X display screen geometry width, height */
244static int bh, blw = 0; /* bar geometry */
245static int (*xerrorxlib)(Display *, XErrorEvent *);
246static unsigned int numlockmask = 0;
247static void (*handler[LASTEvent]) (XEvent *) = {
248 [ButtonPress] = buttonpress,
249 [ConfigureRequest] = configurerequest,
250 [ConfigureNotify] = configurenotify,
251 [DestroyNotify] = destroynotify,
252 [EnterNotify] = enternotify,
253 [Expose] = expose,
254 [FocusIn] = focusin,
255 [KeyPress] = keypress,
256 [MappingNotify] = mappingnotify,
257 [MapRequest] = maprequest,
258 [PropertyNotify] = propertynotify,
259 [UnmapNotify] = unmapnotify
260};
261static Atom wmatom[WMLast], netatom[NetLast];
262static Bool otherwm;
263static Bool running = True;
264static Cursor cursor[CurLast];
265static Display *dpy;
266static DC dc;
267static Monitor *mons = NULL, *selmon = NULL;
268static Window root;
269
270/* configuration, allows nested code to access above variables */
271#include "config.h"
272
273/* compile-time check if all tags fit into an unsigned int bit array. */
274struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
275
276/* function implementations */
277void
278applyrules(Client *c) {
279 const char *class, *instance;
280 unsigned int i;
281 const Rule *r;
282 Monitor *m;
283 XClassHint ch = { 0 };
284
285 /* rule matching */
286 c->isfloating = c->tags = 0;
287 if(XGetClassHint(dpy, c->win, &ch)) {
288 class = ch.res_class ? ch.res_class : broken;
289 instance = ch.res_name ? ch.res_name : broken;
290 for(i = 0; i < LENGTH(rules); i++) {
291 r = &rules[i];
292 if((!r->title || strstr(c->name, r->title))
293 && (!r->class || strstr(class, r->class))
294 && (!r->instance || strstr(instance, r->instance)))
295 {
296 c->isfloating = r->isfloating;
297 c->tags |= r->tags;
298 for(m = mons; m && m->num != r->monitor; m = m->next);
299 if(m)
300 c->mon = m;
301 }
302 }
303 if(ch.res_class)
304 XFree(ch.res_class);
305 if(ch.res_name)
306 XFree(ch.res_name);
307 }
308 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
309}
310
311Bool
312applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
313 Bool baseismin;
314 Monitor *m = c->mon;
315
316 /* set minimum possible */
317 *w = MAX(1, *w);
318 *h = MAX(1, *h);
319 if(interact) {
320 if(*x > sw)
321 *x = sw - WIDTH(c);
322 if(*y > sh)
323 *y = sh - HEIGHT(c);
324 if(*x + *w + 2 * c->bw < 0)
325 *x = 0;
326 if(*y + *h + 2 * c->bw < 0)
327 *y = 0;
328 }
329 else {
330 if(*x > m->mx + m->mw)
331 *x = m->mx + m->mw - WIDTH(c);
332 if(*y > m->my + m->mh)
333 *y = m->my + m->mh - HEIGHT(c);
334 if(*x + *w + 2 * c->bw < m->mx)
335 *x = m->mx;
336 if(*y + *h + 2 * c->bw < m->my)
337 *y = m->my;
338 }
339 if(*h < bh)
340 *h = bh;
341 if(*w < bh)
342 *w = bh;
343 if(resizehints || c->isfloating) {
344 /* see last two sentences in ICCCM 4.1.2.3 */
345 baseismin = c->basew == c->minw && c->baseh == c->minh;
346 if(!baseismin) { /* temporarily remove base dimensions */
347 *w -= c->basew;
348 *h -= c->baseh;
349 }
350 /* adjust for aspect limits */
351 if(c->mina > 0 && c->maxa > 0) {
352 if(c->maxa < (float)*w / *h)
353 *w = *h * c->maxa;
354 else if(c->mina < (float)*h / *w)
355 *h = *w * c->mina;
356 }
357 if(baseismin) { /* increment calculation requires this */
358 *w -= c->basew;
359 *h -= c->baseh;
360 }
361 /* adjust for increment value */
362 if(c->incw)
363 *w -= *w % c->incw;
364 if(c->inch)
365 *h -= *h % c->inch;
366 /* restore base dimensions */
367 *w += c->basew;
368 *h += c->baseh;
369 *w = MAX(*w, c->minw);
370 *h = MAX(*h, c->minh);
371 if(c->maxw)
372 *w = MIN(*w, c->maxw);
373 if(c->maxh)
374 *h = MIN(*h, c->maxh);
375 }
376 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
377}
378
379void
380arrange(void) {
381 Monitor *m;
382
383 /* optimise two loops into one, check focus(NULL) */
384 for(m = mons; m; m = m->next)
385 showhide(m->stack);
386 focus(NULL);
387 for(m = mons; m; m = m->next) {
388 if(m->lt[m->sellt]->arrange)
389 m->lt[m->sellt]->arrange(m);
390 restack(m);
391 }
392}
393
394void
395attach(Client *c) {
396 c->next = c->mon->clients;
397 c->mon->clients = c;
398}
399
400void
401attachstack(Client *c) {
402 c->snext = c->mon->stack;
403 c->mon->stack = c;
404}
405
406void
407buttonpress(XEvent *e) {
408 unsigned int i, x, click;
409 Arg arg = {0};
410 Client *c;
411 Monitor *m;
412 XButtonPressedEvent *ev = &e->xbutton;
413
414 click = ClkRootWin;
415 /* focus monitor if necessary */
416 if((m = wintomon(ev->window)) && m != selmon) {
417 unfocus(selmon->sel);
418 selmon = m;
419 focus(NULL);
420 }
421 if(ev->window == selmon->barwin) {
422 i = x = 0;
423 do {
424 x += TEXTW(tags[i]);
425 } while(ev->x >= x && ++i < LENGTH(tags));
426 if(i < LENGTH(tags)) {
427 click = ClkTagBar;
428 arg.ui = 1 << i;
429 }
430 else if(ev->x < x + blw)
431 click = ClkLtSymbol;
432 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
433 click = ClkStatusText;
434 else
435 click = ClkWinTitle;
436 }
437 else if((c = wintoclient(ev->window))) {
438 focus(c);
439 click = ClkClientWin;
440 }
441 for(i = 0; i < LENGTH(buttons); i++)
442 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
443 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
444 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
445}
446
447void
448checkotherwm(void) {
449 otherwm = False;
450 xerrorxlib = XSetErrorHandler(xerrorstart);
451 /* this causes an error if some other window manager is running */
452 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
453 XSync(dpy, False);
454 if(otherwm)
455 die("dwm: another window manager is already running\n");
456 XSetErrorHandler(xerror);
457 XSync(dpy, False);
458}
459
460void
461cleanup(void) {
462 Arg a = {.ui = ~0};
463 Layout foo = { "", NULL };
464 Monitor *m;
465
466 view(&a);
467 selmon->lt[selmon->sellt] = &foo;
468 for(m = mons; m; m = m->next)
469 while(m->stack)
470 unmanage(m->stack);
471 if(dc.font.set)
472 XFreeFontSet(dpy, dc.font.set);
473 else
474 XFreeFont(dpy, dc.font.xfont);
475 XUngrabKey(dpy, AnyKey, AnyModifier, root);
476 XFreePixmap(dpy, dc.drawable);
477 XFreeGC(dpy, dc.gc);
478 XFreeCursor(dpy, cursor[CurNormal]);
479 XFreeCursor(dpy, cursor[CurResize]);
480 XFreeCursor(dpy, cursor[CurMove]);
481 cleanupmons();
482 XSync(dpy, False);
483 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
484}
485
486void
487cleanupmons(void) {
488 Monitor *m;
489
490 while(mons) {
491 m = mons->next;
492 XUnmapWindow(dpy, mons->barwin);
493 XDestroyWindow(dpy, mons->barwin);
494 free(mons);
495 mons = m;
496 }
497}
498
499void
500clearurgent(Client *c) {
501 XWMHints *wmh;
502
503 c->isurgent = False;
504 if(!(wmh = XGetWMHints(dpy, c->win)))
505 return;
506 wmh->flags &= ~XUrgencyHint;
507 XSetWMHints(dpy, c->win, wmh);
508 XFree(wmh);
509}
510
511void
512configure(Client *c) {
513 XConfigureEvent ce;
514
515 ce.type = ConfigureNotify;
516 ce.display = dpy;
517 ce.event = c->win;
518 ce.window = c->win;
519 ce.x = c->x;
520 ce.y = c->y;
521 ce.width = c->w;
522 ce.height = c->h;
523 ce.border_width = c->bw;
524 ce.above = None;
525 ce.override_redirect = False;
526 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
527}
528
529void
530configurenotify(XEvent *e) {
531 Monitor *m;
532 XConfigureEvent *ev = &e->xconfigure;
533
534 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
535 sw = ev->width;
536 sh = ev->height;
537 updategeom();
538 if(dc.drawable != 0)
539 XFreePixmap(dpy, dc.drawable);
540 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
541 updatebars();
542 for(m = mons; m; m = m->next)
543 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
544 arrange();
545 }
546}
547
548void
549configurerequest(XEvent *e) {
550 Client *c;
551 Monitor *m;
552 XConfigureRequestEvent *ev = &e->xconfigurerequest;
553 XWindowChanges wc;
554
555 if((c = wintoclient(ev->window))) {
556 if(ev->value_mask & CWBorderWidth)
557 c->bw = ev->border_width;
558 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
559 m = c->mon;
560 if(ev->value_mask & CWX)
561 c->x = m->mx + ev->x;
562 if(ev->value_mask & CWY)
563 c->y = m->my + ev->y;
564 if(ev->value_mask & CWWidth)
565 c->w = ev->width;
566 if(ev->value_mask & CWHeight)
567 c->h = ev->height;
568 if((c->x - m->mx + c->w) > m->mw && c->isfloating)
569 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
570 if((c->y - m->my + c->h) > m->mh && c->isfloating)
571 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
572 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
573 configure(c);
574 if(ISVISIBLE(c))
575 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
576 }
577 else
578 configure(c);
579 }
580 else {
581 wc.x = ev->x;
582 wc.y = ev->y;
583 wc.width = ev->width;
584 wc.height = ev->height;
585 wc.border_width = ev->border_width;
586 wc.sibling = ev->above;
587 wc.stack_mode = ev->detail;
588 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
589 }
590 XSync(dpy, False);
591}
592
593void
594destroynotify(XEvent *e) {
595 Client *c;
596 XDestroyWindowEvent *ev = &e->xdestroywindow;
597
598 if((c = wintoclient(ev->window)))
599 unmanage(c);
600}
601
602void
603detach(Client *c) {
604 Client **tc;
605
606 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
607 *tc = c->next;
608}
609
610void
611detachstack(Client *c) {
612 Client **tc, *t;
613
614 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
615 *tc = c->snext;
616
617 if(c == c->mon->sel) {
618 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
619 c->mon->sel = t;
620 }
621}
622
623void
624die(const char *errstr, ...) {
625 va_list ap;
626
627 va_start(ap, errstr);
628 vfprintf(stderr, errstr, ap);
629 va_end(ap);
630 exit(EXIT_FAILURE);
631}
632
633Monitor *
634dirtomon(int dir) {
635 Monitor *m = NULL;
636
637 if(dir > 0) {
638 if(!(m = selmon->next))
639 m = mons;
640 }
641 else {
642 if(selmon == mons)
643 for(m = mons; m->next; m = m->next);
644 else
645 for(m = mons; m->next != selmon; m = m->next);
646 }
647 return m;
648}
649
650void
651drawbar(Monitor *m) {
652 int x;
653 unsigned int i, n = 0, occ = 0, urg = 0;
654 unsigned long *col;
655 Client *c;
656
657 for(c = m->clients; c; c = c->next) {
658 if(ISVISIBLE(c))
659 n++;
660 occ |= c->tags;
661 if(c->isurgent)
662 urg |= c->tags;
663 }
664 dc.x = 0;
665 for(i = 0; i < LENGTH(tags); i++) {
666 dc.w = TEXTW(tags[i]);
667 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
668 drawtext(tags[i], col, urg & 1 << i);
669 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
670 occ & 1 << i, urg & 1 << i, col);
671 dc.x += dc.w;
672 }
673 if(blw > 0) {
674 dc.w = blw;
675 drawtext(m->lt[m->sellt]->symbol, dc.norm, False);
676 dc.x += dc.w;
677 }
678 snprintf(ntext, sizeof ntext, "%u", n);
679 dc.w = TEXTW(ntext);
680 drawtext(ntext, dc.norm, False);
681 x = (dc.x += dc.w);
682 if(m == selmon) { /* status is only drawn on selected monitor */
683 dc.w = TEXTW(stext);
684 dc.x = m->ww - dc.w;
685 if(dc.x < x) {
686 dc.x = x;
687 dc.w = m->ww - x;
688 }
689 drawtext(stext, dc.norm, False);
690 }
691 else
692 dc.x = m->ww;
693 if((dc.w = dc.x - x) > bh) {
694 dc.x = x;
695 if(m->sel) {
696 col = m == selmon ? dc.sel : dc.norm;
697 drawtext(m->sel->name, col, False);
698 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
699 }
700 else
701 drawtext(NULL, dc.norm, False);
702 }
703 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
704 XSync(dpy, False);
705}
706
707void
708drawbars(void) {
709 Monitor *m;
710
711 for(m = mons; m; m = m->next)
712 drawbar(m);
713}
714
715void
716drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
717 int x;
718 XGCValues gcv;
719 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
720
721 gcv.foreground = col[invert ? ColBG : ColFG];
722 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
723 x = (dc.font.ascent + dc.font.descent + 2) / 4;
724 r.x = dc.x + 1;
725 r.y = dc.y + 1;
726 if(filled) {
727 r.width = r.height = x + 1;
728 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
729 }
730 else if(empty) {
731 r.width = r.height = x;
732 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
733 }
734}
735
736void
737drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
738 char buf[256];
739 int i, x, y, h, len, olen;
740 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
741
742 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
743 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
744 if(!text)
745 return;
746 olen = strlen(text);
747 h = dc.font.ascent + dc.font.descent;
748 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
749 x = dc.x + (h / 2);
750 /* shorten text if necessary */
751 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
752 if(!len)
753 return;
754 memcpy(buf, text, len);
755 if(len < olen)
756 for(i = len; i && i > len - 3; buf[--i] = '.');
757 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
758 if(dc.font.set)
759 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
760 else
761 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
762}
763
764void
765enternotify(XEvent *e) {
766 Client *c;
767 Monitor *m;
768 XCrossingEvent *ev = &e->xcrossing;
769
770 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
771 return;
772 if((m = wintomon(ev->window)) && m != selmon) {
773 unfocus(selmon->sel);
774 selmon = m;
775 }
776 if((c = wintoclient(ev->window)))
777 focus(c);
778 else
779 focus(NULL);
780}
781
782void
783expose(XEvent *e) {
784 Monitor *m;
785 XExposeEvent *ev = &e->xexpose;
786
787 if(ev->count == 0 && (m = wintomon(ev->window)))
788 drawbar(m);
789}
790
791void
792focus(Client *c) {
793 if(!c || !ISVISIBLE(c))
794 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
795 if(selmon->sel)
796 unfocus(selmon->sel);
797 if(c) {
798 if(c->mon != selmon)
799 selmon = c->mon;
800 if(c->isurgent)
801 clearurgent(c);
802 detachstack(c);
803 attachstack(c);
804 grabbuttons(c, True);
805 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
806 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
807 }
808 else
809 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
810 selmon->sel = c;
811 drawbars();
812}
813
814void
815focusin(XEvent *e) { /* there are some broken focus acquiring clients */
816 XFocusChangeEvent *ev = &e->xfocus;
817
818 if(selmon->sel && ev->window != selmon->sel->win)
819 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
820}
821
822void
823focusmon(const Arg *arg) {
824 Monitor *m = NULL;
825
826 if(!mons->next)
827 return;
828 m = dirtomon(arg->i);
829 unfocus(selmon->sel);
830 selmon = m;
831 focus(NULL);
832}
833
834void
835focusstack(const Arg *arg) {
836 Client *c = NULL, *i;
837
838 if(!selmon->sel)
839 return;
840 if(arg->i > 0) {
841 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
842 if(!c)
843 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
844 }
845 else {
846 for(i = selmon->clients; i != selmon->sel; i = i->next)
847 if(ISVISIBLE(i))
848 c = i;
849 if(!c)
850 for(; i; i = i->next)
851 if(ISVISIBLE(i))
852 c = i;
853 }
854 if(c) {
855 focus(c);
856 restack(selmon);
857 }
858}
859
860unsigned long
861getcolor(const char *colstr) {
862 Colormap cmap = DefaultColormap(dpy, screen);
863 XColor color;
864
865 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
866 die("error, cannot allocate color '%s'\n", colstr);
867 return color.pixel;
868}
869
870Bool
871getrootptr(int *x, int *y) {
872 int di;
873 unsigned int dui;
874 Window dummy;
875
876 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
877}
878
879long
880getstate(Window w) {
881 int format, status;
882 long result = -1;
883 unsigned char *p = NULL;
884 unsigned long n, extra;
885 Atom real;
886
887 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
888 &real, &format, &n, &extra, (unsigned char **)&p);
889 if(status != Success)
890 return -1;
891 if(n != 0)
892 result = *p;
893 XFree(p);
894 return result;
895}
896
897Bool
898gettextprop(Window w, Atom atom, char *text, unsigned int size) {
899 char **list = NULL;
900 int n;
901 XTextProperty name;
902
903 if(!text || size == 0)
904 return False;
905 text[0] = '\0';
906 XGetTextProperty(dpy, w, &name, atom);
907 if(!name.nitems)
908 return False;
909 if(name.encoding == XA_STRING)
910 strncpy(text, (char *)name.value, size - 1);
911 else {
912 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
913 && n > 0 && *list)
914 {
915 strncpy(text, *list, size - 1);
916 XFreeStringList(list);
917 }
918 }
919 text[size - 1] = '\0';
920 XFree(name.value);
921 return True;
922}
923
924void
925grabbuttons(Client *c, Bool focused) {
926 updatenumlockmask();
927 {
928 unsigned int i, j;
929 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
930 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
931 if(focused) {
932 for(i = 0; i < LENGTH(buttons); i++)
933 if(buttons[i].click == ClkClientWin)
934 for(j = 0; j < LENGTH(modifiers); j++)
935 XGrabButton(dpy, buttons[i].button,
936 buttons[i].mask | modifiers[j],
937 c->win, False, BUTTONMASK,
938 GrabModeAsync, GrabModeSync, None, None);
939 }
940 else
941 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
942 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
943 }
944}
945
946void
947grabkeys(void) {
948 updatenumlockmask();
949 {
950 unsigned int i, j;
951 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
952 KeyCode code;
953
954 XUngrabKey(dpy, AnyKey, AnyModifier, root);
955 for(i = 0; i < LENGTH(keys); i++) {
956 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
957 for(j = 0; j < LENGTH(modifiers); j++)
958 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
959 True, GrabModeAsync, GrabModeAsync);
960 }
961 }
962}
963
964void
965initfont(const char *fontstr) {
966 char *def, **missing;
967 int i, n;
968
969 missing = NULL;
970 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
971 if(missing) {
972 while(n--)
973 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
974 XFreeStringList(missing);
975 }
976 if(dc.font.set) {
977 XFontSetExtents *font_extents;
978 XFontStruct **xfonts;
979 char **font_names;
980
981 dc.font.ascent = dc.font.descent = 0;
982 font_extents = XExtentsOfFontSet(dc.font.set);
983 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
984 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
985 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
986 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
987 xfonts++;
988 }
989 }
990 else {
991 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
992 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
993 die("error, cannot load font: '%s'\n", fontstr);
994 dc.font.ascent = dc.font.xfont->ascent;
995 dc.font.descent = dc.font.xfont->descent;
996 }
997 dc.font.height = dc.font.ascent + dc.font.descent;
998}
999
1000Bool
1001isprotodel(Client *c) {
1002 int i, n;
1003 Atom *protocols;
1004 Bool ret = False;
1005
1006 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1007 for(i = 0; !ret && i < n; i++)
1008 if(protocols[i] == wmatom[WMDelete])
1009 ret = True;
1010 XFree(protocols);
1011 }
1012 return ret;
1013}
1014
1015void
1016keypress(XEvent *e) {
1017 unsigned int i;
1018 KeySym keysym;
1019 XKeyEvent *ev;
1020
1021 ev = &e->xkey;
1022 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1023 for(i = 0; i < LENGTH(keys); i++)
1024 if(keysym == keys[i].keysym
1025 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1026 && keys[i].func)
1027 keys[i].func(&(keys[i].arg));
1028}
1029
1030void
1031killclient(const Arg *arg) {
1032 XEvent ev;
1033
1034 if(!selmon->sel)
1035 return;
1036 if(isprotodel(selmon->sel)) {
1037 ev.type = ClientMessage;
1038 ev.xclient.window = selmon->sel->win;
1039 ev.xclient.message_type = wmatom[WMProtocols];
1040 ev.xclient.format = 32;
1041 ev.xclient.data.l[0] = wmatom[WMDelete];
1042 ev.xclient.data.l[1] = CurrentTime;
1043 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1044 }
1045 else
1046 XKillClient(dpy, selmon->sel->win);
1047}
1048
1049void
1050manage(Window w, XWindowAttributes *wa) {
1051 static Client cz;
1052 Client *c, *t = NULL;
1053 Window trans = None;
1054 XWindowChanges wc;
1055
1056 if(!(c = malloc(sizeof(Client))))
1057 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1058 *c = cz;
1059 c->win = w;
1060 updatetitle(c);
1061 if(XGetTransientForHint(dpy, w, &trans))
1062 t = wintoclient(trans);
1063 if(t) {
1064 c->mon = t->mon;
1065 c->tags = t->tags;
1066 }
1067 else {
1068 c->mon = selmon;
1069 applyrules(c);
1070 }
1071 /* geometry */
1072 c->x = wa->x + c->mon->wx;
1073 c->y = wa->y + c->mon->wy;
1074 c->w = wa->width;
1075 c->h = wa->height;
1076 c->oldbw = wa->border_width;
1077 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1078 c->x = c->mon->mx;
1079 c->y = c->mon->my;
1080 c->bw = 0;
1081 }
1082 else {
1083 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1084 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1085 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1086 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1087 c->x = MAX(c->x, c->mon->mx);
1088 /* only fix client y-offset, if the client center might cover the bar */
1089 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1090 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1091 c->bw = borderpx;
1092 }
1093 wc.border_width = c->bw;
1094 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1095 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1096 configure(c); /* propagates border_width, if size doesn't change */
1097 updatesizehints(c);
1098 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1099 grabbuttons(c, False);
1100 if(!c->isfloating)
1101 c->isfloating = trans != None || c->isfixed;
1102 if(c->isfloating)
1103 XRaiseWindow(dpy, c->win);
1104 attach(c);
1105 attachstack(c);
1106 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1107 XMapWindow(dpy, c->win);
1108 setclientstate(c, NormalState);
1109 arrange();
1110}
1111
1112void
1113mappingnotify(XEvent *e) {
1114 XMappingEvent *ev = &e->xmapping;
1115
1116 XRefreshKeyboardMapping(ev);
1117 if(ev->request == MappingKeyboard)
1118 grabkeys();
1119}
1120
1121void
1122maprequest(XEvent *e) {
1123 static XWindowAttributes wa;
1124 XMapRequestEvent *ev = &e->xmaprequest;
1125
1126 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1127 return;
1128 if(wa.override_redirect)
1129 return;
1130 if(!wintoclient(ev->window))
1131 manage(ev->window, &wa);
1132}
1133
1134void
1135monocle(Monitor *m) {
1136 Client *c;
1137
1138 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1139 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1140}
1141
1142void
1143movemouse(const Arg *arg) {
1144 int x, y, ocx, ocy, nx, ny;
1145 Client *c;
1146 Monitor *m;
1147 XEvent ev;
1148
1149 if(!(c = selmon->sel))
1150 return;
1151 restack(selmon);
1152 ocx = c->x;
1153 ocy = c->y;
1154 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1155 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1156 return;
1157 if(!getrootptr(&x, &y))
1158 return;
1159 do {
1160 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1161 switch (ev.type) {
1162 case ConfigureRequest:
1163 case Expose:
1164 case MapRequest:
1165 handler[ev.type](&ev);
1166 break;
1167 case MotionNotify:
1168 nx = ocx + (ev.xmotion.x - x);
1169 ny = ocy + (ev.xmotion.y - y);
1170 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1171 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1172 if(abs(selmon->wx - nx) < snap)
1173 nx = selmon->wx;
1174 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1175 nx = selmon->wx + selmon->ww - WIDTH(c);
1176 if(abs(selmon->wy - ny) < snap)
1177 ny = selmon->wy;
1178 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1179 ny = selmon->wy + selmon->wh - HEIGHT(c);
1180 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1181 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1182 togglefloating(NULL);
1183 }
1184 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1185 resize(c, nx, ny, c->w, c->h, True);
1186 break;
1187 }
1188 } while(ev.type != ButtonRelease);
1189 XUngrabPointer(dpy, CurrentTime);
1190 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1191 sendmon(c, m);
1192 selmon = m;
1193 focus(NULL);
1194 }
1195}
1196
1197Client *
1198nexttiled(Client *c) {
1199 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1200 return c;
1201}
1202
1203Monitor *
1204ptrtomon(int x, int y) {
1205 Monitor *m;
1206
1207 for(m = mons; m; m = m->next)
1208 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1209 return m;
1210 return selmon;
1211}
1212
1213void
1214propertynotify(XEvent *e) {
1215 Client *c;
1216 Window trans;
1217 XPropertyEvent *ev = &e->xproperty;
1218
1219 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1220 updatestatus();
1221 else if(ev->state == PropertyDelete)
1222 return; /* ignore */
1223 else if((c = wintoclient(ev->window))) {
1224 switch (ev->atom) {
1225 default: break;
1226 case XA_WM_TRANSIENT_FOR:
1227 XGetTransientForHint(dpy, c->win, &trans);
1228 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1229 arrange();
1230 break;
1231 case XA_WM_NORMAL_HINTS:
1232 updatesizehints(c);
1233 break;
1234 case XA_WM_HINTS:
1235 updatewmhints(c);
1236 drawbars();
1237 break;
1238 }
1239 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1240 updatetitle(c);
1241 if(c == selmon->sel)
1242 drawbars();
1243 }
1244 }
1245}
1246
1247void
1248quit(const Arg *arg) {
1249 running = False;
1250}
1251
1252void
1253resize(Client *c, int x, int y, int w, int h, Bool interact) {
1254 XWindowChanges wc;
1255
1256 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1257 c->x = wc.x = x;
1258 c->y = wc.y = y;
1259 c->w = wc.width = w;
1260 c->h = wc.height = h;
1261 wc.border_width = c->bw;
1262 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1263 configure(c);
1264 XSync(dpy, False);
1265 }
1266}
1267
1268void
1269resizemouse(const Arg *arg) {
1270 int ocx, ocy;
1271 int nw, nh;
1272 Client *c;
1273 Monitor *m;
1274 XEvent ev;
1275
1276 if(!(c = selmon->sel))
1277 return;
1278 restack(selmon);
1279 ocx = c->x;
1280 ocy = c->y;
1281 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1282 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1283 return;
1284 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1285 do {
1286 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1287 switch(ev.type) {
1288 case ConfigureRequest:
1289 case Expose:
1290 case MapRequest:
1291 handler[ev.type](&ev);
1292 break;
1293 case MotionNotify:
1294 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1295 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1296 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1297 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1298 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1299 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1300 togglefloating(NULL);
1301 }
1302 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1303 resize(c, c->x, c->y, nw, nh, True);
1304 break;
1305 }
1306 } while(ev.type != ButtonRelease);
1307 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1308 XUngrabPointer(dpy, CurrentTime);
1309 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1310 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1311 sendmon(c, m);
1312 selmon = m;
1313 focus(NULL);
1314 }
1315}
1316
1317void
1318restack(Monitor *m) {
1319 Client *c;
1320 XEvent ev;
1321 XWindowChanges wc;
1322
1323 drawbars();
1324 if(!m->sel)
1325 return;
1326 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1327 XRaiseWindow(dpy, m->sel->win);
1328 if(m->lt[m->sellt]->arrange) {
1329 wc.stack_mode = Below;
1330 wc.sibling = m->barwin;
1331 for(c = m->stack; c; c = c->snext)
1332 if(!c->isfloating && ISVISIBLE(c)) {
1333 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1334 wc.sibling = c->win;
1335 }
1336 }
1337 XSync(dpy, False);
1338 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1339}
1340
1341void
1342run(void) {
1343 XEvent ev;
1344
1345 /* main event loop */
1346 XSync(dpy, False);
1347 while(running && !XNextEvent(dpy, &ev))
1348 if(handler[ev.type])
1349 handler[ev.type](&ev); /* call handler */
1350}
1351
1352void
1353scan(void) {
1354 unsigned int i, num;
1355 Window d1, d2, *wins = NULL;
1356 XWindowAttributes wa;
1357
1358 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1359 for(i = 0; i < num; i++) {
1360 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1361 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1362 continue;
1363 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1364 manage(wins[i], &wa);
1365 }
1366 for(i = 0; i < num; i++) { /* now the transients */
1367 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1368 continue;
1369 if(XGetTransientForHint(dpy, wins[i], &d1)
1370 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1371 manage(wins[i], &wa);
1372 }
1373 if(wins)
1374 XFree(wins);
1375 }
1376}
1377
1378void
1379sendmon(Client *c, Monitor *m) {
1380 if(c->mon == m)
1381 return;
1382 unfocus(c);
1383 detach(c);
1384 detachstack(c);
1385 c->mon = m;
1386 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1387 attach(c);
1388 attachstack(c);
1389 focus(NULL);
1390 arrange();
1391}
1392
1393void
1394setclientstate(Client *c, long state) {
1395 long data[] = { state, None };
1396
1397 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1398 PropModeReplace, (unsigned char *)data, 2);
1399}
1400
1401void
1402setlayout(const Arg *arg) {
1403 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1404 selmon->sellt ^= 1;
1405 if(arg && arg->v)
1406 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1407 if(selmon->sel)
1408 arrange();
1409 else
1410 drawbars();
1411}
1412
1413/* arg > 1.0 will set mfact absolutly */
1414void
1415setmfact(const Arg *arg) {
1416 float f;
1417
1418 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1419 return;
1420 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1421 if(f < 0.1 || f > 0.9)
1422 return;
1423 selmon->mfact = f;
1424 arrange();
1425}
1426
1427void
1428setup(void) {
1429 unsigned int i;
1430 int w;
1431 XSetWindowAttributes wa;
1432
1433 /* init screen */
1434 screen = DefaultScreen(dpy);
1435 root = RootWindow(dpy, screen);
1436 initfont(font);
1437 sw = DisplayWidth(dpy, screen);
1438 sh = DisplayHeight(dpy, screen);
1439 bh = dc.h = dc.font.height + 2;
1440 updategeom();
1441 /* init atoms */
1442 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1443 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1444 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1445 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1446 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1447 /* init cursors */
1448 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1449 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1450 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1451 /* init appearance */
1452 dc.norm[ColBorder] = getcolor(normbordercolor);
1453 dc.norm[ColBG] = getcolor(normbgcolor);
1454 dc.norm[ColFG] = getcolor(normfgcolor);
1455 dc.sel[ColBorder] = getcolor(selbordercolor);
1456 dc.sel[ColBG] = getcolor(selbgcolor);
1457 dc.sel[ColFG] = getcolor(selfgcolor);
1458 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1459 dc.gc = XCreateGC(dpy, root, 0, NULL);
1460 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1461 if(!dc.font.set)
1462 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1463 /* init bars */
1464 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1465 w = TEXTW(layouts[i].symbol);
1466 blw = MAX(blw, w);
1467 }
1468 updatebars();
1469 updatestatus();
1470 /* EWMH support per view */
1471 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1472 PropModeReplace, (unsigned char *) netatom, NetLast);
1473 /* select for events */
1474 wa.cursor = cursor[CurNormal];
1475 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1476 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1477 |PropertyChangeMask;
1478 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1479 XSelectInput(dpy, root, wa.event_mask);
1480 grabkeys();
1481}
1482
1483void
1484showhide(Client *c) {
1485 if(!c)
1486 return;
1487 if(ISVISIBLE(c)) { /* show clients top down */
1488 XMoveWindow(dpy, c->win, c->x, c->y);
1489 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1490 resize(c, c->x, c->y, c->w, c->h, False);
1491 showhide(c->snext);
1492 }
1493 else { /* hide clients bottom up */
1494 showhide(c->snext);
1495 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1496 }
1497}
1498
1499
1500void
1501sigchld(int signal) {
1502 while(0 < waitpid(-1, NULL, WNOHANG));
1503}
1504
1505void
1506spawn(const Arg *arg) {
1507 signal(SIGCHLD, sigchld);
1508 if(fork() == 0) {
1509 if(dpy)
1510 close(ConnectionNumber(dpy));
1511 setsid();
1512 execvp(((char **)arg->v)[0], (char **)arg->v);
1513 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1514 perror(" failed");
1515 exit(0);
1516 }
1517}
1518
1519void
1520tag(const Arg *arg) {
1521 if(selmon->sel && arg->ui & TAGMASK) {
1522 selmon->sel->tags = arg->ui & TAGMASK;
1523 arrange();
1524 }
1525}
1526
1527void
1528tagmon(const Arg *arg) {
1529 if(!selmon->sel || !mons->next)
1530 return;
1531 sendmon(selmon->sel, dirtomon(arg->i));
1532}
1533
1534int
1535textnw(const char *text, unsigned int len) {
1536 XRectangle r;
1537
1538 if(dc.font.set) {
1539 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1540 return r.width;
1541 }
1542 return XTextWidth(dc.font.xfont, text, len);
1543}
1544
1545void
1546tile(Monitor *m) {
1547 int x, y, h, w, mw;
1548 unsigned int i, n;
1549 Client *c;
1550
1551 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1552 if(n == 0)
1553 return;
1554 /* master */
1555 c = nexttiled(m->clients);
1556 mw = m->mfact * m->ww;
1557 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1558 if(--n == 0)
1559 return;
1560 /* tile stack */
1561 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1562 y = m->wy;
1563 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1564 h = m->wh / n;
1565 if(h < bh)
1566 h = m->wh;
1567 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1568 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1569 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1570 if(h != m->wh)
1571 y = c->y + HEIGHT(c);
1572 }
1573}
1574
1575void
1576togglebar(const Arg *arg) {
1577 selmon->showbar = !selmon->showbar;
1578 updatebarpos(selmon);
1579 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1580 arrange();
1581}
1582
1583void
1584togglefloating(const Arg *arg) {
1585 if(!selmon->sel)
1586 return;
1587 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1588 if(selmon->sel->isfloating)
1589 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1590 selmon->sel->w, selmon->sel->h, False);
1591 arrange();
1592}
1593
1594void
1595toggletag(const Arg *arg) {
1596 unsigned int mask;
1597
1598 if(!selmon->sel)
1599 return;
1600 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1601 if(mask) {
1602 selmon->sel->tags = mask;
1603 arrange();
1604 }
1605}
1606
1607void
1608toggleview(const Arg *arg) {
1609 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1610
1611 if(mask) {
1612 selmon->tagset[selmon->seltags] = mask;
1613 arrange();
1614 }
1615}
1616
1617void
1618unfocus(Client *c) {
1619 if(!c)
1620 return;
1621 grabbuttons(c, False);
1622 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1623 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1624}
1625
1626void
1627unmanage(Client *c) {
1628 XWindowChanges wc;
1629
1630 wc.border_width = c->oldbw;
1631 /* The server grab construct avoids race conditions. */
1632 XGrabServer(dpy);
1633 XSetErrorHandler(xerrordummy);
1634 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1635 detach(c);
1636 detachstack(c);
1637 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1638 setclientstate(c, WithdrawnState);
1639 free(c);
1640 XSync(dpy, False);
1641 XSetErrorHandler(xerror);
1642 XUngrabServer(dpy);
1643 focus(NULL);
1644 arrange();
1645}
1646
1647void
1648unmapnotify(XEvent *e) {
1649 Client *c;
1650 XUnmapEvent *ev = &e->xunmap;
1651
1652 if((c = wintoclient(ev->window)))
1653 unmanage(c);
1654}
1655
1656void
1657updatebars(void) {
1658 Monitor *m;
1659 XSetWindowAttributes wa;
1660
1661 wa.override_redirect = True;
1662 wa.background_pixmap = ParentRelative;
1663 wa.event_mask = ButtonPressMask|ExposureMask;
1664 for(m = mons; m; m = m->next) {
1665 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1666 CopyFromParent, DefaultVisual(dpy, screen),
1667 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1668 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1669 XMapRaised(dpy, m->barwin);
1670 }
1671}
1672
1673void
1674updatebarpos(Monitor *m) {
1675 m->wy = m->my;
1676 m->wh = m->mh;
1677 if(m->showbar) {
1678 m->wh -= bh;
1679 m->by = m->topbar ? m->wy : m->wy + m->wh;
1680 m->wy = m->topbar ? m->wy + bh : m->wy;
1681 }
1682 else
1683 m->by = -bh;
1684}
1685
1686void
1687updategeom(void) {
1688 int i, n = 1;
1689 Client *c;
1690 Monitor *newmons = NULL, *m = NULL, *tm;
1691
1692#ifdef XINERAMA
1693 XineramaScreenInfo *info = NULL;
1694
1695 if(XineramaIsActive(dpy))
1696 info = XineramaQueryScreens(dpy, &n);
1697#endif /* XINERAMA */
1698 /* allocate monitor(s) for the new geometry setup */
1699 for(i = 0; i < n; i++) {
1700 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1701 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1702 m->next = newmons;
1703 newmons = m;
1704 }
1705 /* initialise monitor(s) */
1706#ifdef XINERAMA
1707 if(XineramaIsActive(dpy)) {
1708 for(i = 0, m = newmons; m; m = m->next, i++) {
1709 m->num = info[i].screen_number;
1710 m->mx = m->wx = info[i].x_org;
1711 m->my = m->wy = info[i].y_org;
1712 m->mw = m->ww = info[i].width;
1713 m->mh = m->wh = info[i].height;
1714 }
1715 XFree(info);
1716 }
1717 else
1718#endif /* XINERAMA */
1719 /* default monitor setup */
1720 {
1721 m->num = 0;
1722 m->mx = m->wx = 0;
1723 m->my = m->wy = 0;
1724 m->mw = m->ww = sw;
1725 m->mh = m->wh = sh;
1726 }
1727 /* bar geometry setup */
1728 for(m = newmons; m; m = m->next) {
1729 m->sel = m->stack = m->clients = NULL;
1730 m->seltags = 0;
1731 m->sellt = 0;
1732 m->tagset[0] = m->tagset[1] = 1;
1733 m->mfact = mfact;
1734 m->showbar = showbar;
1735 m->topbar = topbar;
1736 m->lt[0] = &layouts[0];
1737 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1738 updatebarpos(m);
1739 }
1740 /* reassign left over clients of disappeared monitors */
1741 for(tm = mons; tm; tm = tm->next)
1742 while(tm->clients) {
1743 c = tm->clients;
1744 tm->clients = c->next;
1745 detachstack(c);
1746 c->mon = newmons;
1747 attach(c);
1748 attachstack(c);
1749 }
1750 /* select focused monitor */
1751 cleanupmons();
1752 selmon = mons = newmons;
1753 selmon = wintomon(root);
1754}
1755
1756void
1757updatenumlockmask(void) {
1758 unsigned int i, j;
1759 XModifierKeymap *modmap;
1760
1761 numlockmask = 0;
1762 modmap = XGetModifierMapping(dpy);
1763 for(i = 0; i < 8; i++)
1764 for(j = 0; j < modmap->max_keypermod; j++)
1765 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1766 == XKeysymToKeycode(dpy, XK_Num_Lock))
1767 numlockmask = (1 << i);
1768 XFreeModifiermap(modmap);
1769}
1770
1771void
1772updatesizehints(Client *c) {
1773 long msize;
1774 XSizeHints size;
1775
1776 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1777 /* size is uninitialized, ensure that size.flags aren't used */
1778 size.flags = PSize;
1779 if(size.flags & PBaseSize) {
1780 c->basew = size.base_width;
1781 c->baseh = size.base_height;
1782 }
1783 else if(size.flags & PMinSize) {
1784 c->basew = size.min_width;
1785 c->baseh = size.min_height;
1786 }
1787 else
1788 c->basew = c->baseh = 0;
1789 if(size.flags & PResizeInc) {
1790 c->incw = size.width_inc;
1791 c->inch = size.height_inc;
1792 }
1793 else
1794 c->incw = c->inch = 0;
1795 if(size.flags & PMaxSize) {
1796 c->maxw = size.max_width;
1797 c->maxh = size.max_height;
1798 }
1799 else
1800 c->maxw = c->maxh = 0;
1801 if(size.flags & PMinSize) {
1802 c->minw = size.min_width;
1803 c->minh = size.min_height;
1804 }
1805 else if(size.flags & PBaseSize) {
1806 c->minw = size.base_width;
1807 c->minh = size.base_height;
1808 }
1809 else
1810 c->minw = c->minh = 0;
1811 if(size.flags & PAspect) {
1812 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1813 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1814 }
1815 else
1816 c->maxa = c->mina = 0.0;
1817 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1818 && c->maxw == c->minw && c->maxh == c->minh);
1819}
1820
1821void
1822updatetitle(Client *c) {
1823 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1824 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1825 if(c->name[0] == '\0') /* hack to mark broken clients */
1826 strcpy(c->name, broken);
1827}
1828
1829void
1830updatestatus(void) {
1831 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1832 strcpy(stext, "dwm-"VERSION);
1833 drawbar(selmon);
1834}
1835
1836void
1837updatewmhints(Client *c) {
1838 XWMHints *wmh;
1839
1840 if((wmh = XGetWMHints(dpy, c->win))) {
1841 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1842 wmh->flags &= ~XUrgencyHint;
1843 XSetWMHints(dpy, c->win, wmh);
1844 }
1845 else
1846 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1847 XFree(wmh);
1848 }
1849}
1850
1851void
1852view(const Arg *arg) {
1853 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1854 return;
1855 selmon->seltags ^= 1; /* toggle sel tagset */
1856 if(arg->ui & TAGMASK)
1857 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1858 arrange();
1859}
1860
1861Client *
1862wintoclient(Window w) {
1863 Client *c;
1864 Monitor *m;
1865
1866 for(m = mons; m; m = m->next)
1867 for(c = m->clients; c; c = c->next)
1868 if(c->win == w)
1869 return c;
1870 return NULL;
1871}
1872
1873Monitor *
1874wintomon(Window w) {
1875 int x, y;
1876 Client *c;
1877 Monitor *m;
1878
1879 if(w == root && getrootptr(&x, &y))
1880 return ptrtomon(x, y);
1881 for(m = mons; m; m = m->next)
1882 if(w == m->barwin)
1883 return m;
1884 if((c = wintoclient(w)))
1885 return c->mon;
1886 return selmon;
1887}
1888
1889/* There's no way to check accesses to destroyed windows, thus those cases are
1890 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1891 * default error handler, which may call exit. */
1892int
1893xerror(Display *dpy, XErrorEvent *ee) {
1894 if(ee->error_code == BadWindow
1895 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1896 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1897 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1898 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1899 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1900 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1901 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1902 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1903 return 0;
1904 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1905 ee->request_code, ee->error_code);
1906 return xerrorxlib(dpy, ee); /* may call exit */
1907}
1908
1909int
1910xerrordummy(Display *dpy, XErrorEvent *ee) {
1911 return 0;
1912}
1913
1914/* Startup Error handler to check if another window manager
1915 * is already running. */
1916int
1917xerrorstart(Display *dpy, XErrorEvent *ee) {
1918 otherwm = True;
1919 return -1;
1920}
1921
1922void
1923zoom(const Arg *arg) {
1924 Client *c = selmon->sel;
1925
1926 if(!selmon->lt[selmon->sellt]->arrange
1927 || selmon->lt[selmon->sellt]->arrange == monocle
1928 || (selmon->sel && selmon->sel->isfloating))
1929 return;
1930 if(c == nexttiled(selmon->clients))
1931 if(!c || !(c = nexttiled(c->next)))
1932 return;
1933 detach(c);
1934 attach(c);
1935 focus(c);
1936 arrange();
1937}
1938
1939int
1940main(int argc, char *argv[]) {
1941 if(argc == 2 && !strcmp("-v", argv[1]))
1942 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1943 else if(argc != 1)
1944 die("usage: dwm [-v]\n");
1945 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1946 fputs("warning: no locale support\n", stderr);
1947 if(!(dpy = XOpenDisplay(NULL)))
1948 die("dwm: cannot open display\n");
1949 checkotherwm();
1950 setup();
1951 scan();
1952 run();
1953 cleanup();
1954 XCloseDisplay(dpy);
1955 return 0;
1956}