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 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
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(x) (x->tags & tagset[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 */
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 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 Client Client;
81struct Client {
82 char name[256];
83 float mina, maxa;
84 int x, y, w, h;
85 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
86 int bw, oldbw;
87 unsigned int tags;
88 Bool isfixed, isfloating, isurgent;
89 Client *next;
90 Client *snext;
91 Window win;
92};
93
94typedef struct {
95 int x, y, w, h;
96 unsigned long norm[ColLast];
97 unsigned long sel[ColLast];
98 Drawable drawable;
99 GC gc;
100 struct {
101 int ascent;
102 int descent;
103 int height;
104 XFontSet set;
105 XFontStruct *xfont;
106 } font;
107} DC; /* draw context */
108
109typedef struct {
110 unsigned int mod;
111 KeySym keysym;
112 void (*func)(const Arg *);
113 const Arg arg;
114} Key;
115
116typedef struct {
117 const char *symbol;
118 void (*arrange)(void);
119} Layout;
120
121typedef struct {
122 const char *class;
123 const char *instance;
124 const char *title;
125 unsigned int tags;
126 Bool isfloating;
127} Rule;
128
129/* function declarations */
130static void applyrules(Client *c);
131static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
132static void arrange(void);
133static void attach(Client *c);
134static void attachstack(Client *c);
135static void buttonpress(XEvent *e);
136static void checkotherwm(void);
137static void cleanup(void);
138static void clearurgent(Client *c);
139static void configure(Client *c);
140static void configurenotify(XEvent *e);
141static void configurerequest(XEvent *e);
142static void destroynotify(XEvent *e);
143static void detach(Client *c);
144static void detachstack(Client *c);
145static void die(const char *errstr, ...);
146static void drawbar(void);
147static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
148static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
149static void enternotify(XEvent *e);
150static void expose(XEvent *e);
151static void focus(Client *c);
152static void focusin(XEvent *e);
153static void focusstack(const Arg *arg);
154static Client *getclient(Window w);
155static unsigned long getcolor(const char *colstr);
156static long getstate(Window w);
157static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
158static void grabbuttons(Client *c, Bool focused);
159static void grabkeys(void);
160static void initfont(const char *fontstr);
161static Bool isprotodel(Client *c);
162static void keypress(XEvent *e);
163static void killclient(const Arg *arg);
164static void manage(Window w, XWindowAttributes *wa);
165static void mappingnotify(XEvent *e);
166static void maprequest(XEvent *e);
167static void monocle(void);
168static void movemouse(const Arg *arg);
169static Client *nexttiled(Client *c);
170static void propertynotify(XEvent *e);
171static void quit(const Arg *arg);
172static void resize(Client *c, int x, int y, int w, int h);
173static void resizemouse(const Arg *arg);
174static void restack(void);
175static void run(void);
176static void scan(void);
177static void setclientstate(Client *c, long state);
178static void setlayout(const Arg *arg);
179static void setmfact(const Arg *arg);
180static void setup(void);
181static void showhide(Client *c);
182static void sigchld(int signal);
183static void spawn(const Arg *arg);
184static void tag(const Arg *arg);
185static int textnw(const char *text, unsigned int len);
186static void tile(void);
187static void togglebar(const Arg *arg);
188static void togglefloating(const Arg *arg);
189static void toggletag(const Arg *arg);
190static void toggleview(const Arg *arg);
191static void unmanage(Client *c);
192static void unmapnotify(XEvent *e);
193static void updatebar(void);
194static void updategeom(void);
195static void updatenumlockmask(void);
196static void updatesizehints(Client *c);
197static void updatestatus(void);
198static void updatetitle(Client *c);
199static void updatewmhints(Client *c);
200static void view(const Arg *arg);
201static int xerror(Display *dpy, XErrorEvent *ee);
202static int xerrordummy(Display *dpy, XErrorEvent *ee);
203static int xerrorstart(Display *dpy, XErrorEvent *ee);
204static void zoom(const Arg *arg);
205
206/* variables */
207static char stext[256];
208static int screen;
209static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
210static int by, bh, blw; /* bar geometry y, height and layout symbol width */
211static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
212static unsigned int seltags = 0, sellt = 0;
213static int (*xerrorxlib)(Display *, XErrorEvent *);
214static unsigned int numlockmask = 0;
215static void (*handler[LASTEvent]) (XEvent *) = {
216 [ButtonPress] = buttonpress,
217 [ConfigureRequest] = configurerequest,
218 [ConfigureNotify] = configurenotify,
219 [DestroyNotify] = destroynotify,
220 [EnterNotify] = enternotify,
221 [Expose] = expose,
222 [FocusIn] = focusin,
223 [KeyPress] = keypress,
224 [MappingNotify] = mappingnotify,
225 [MapRequest] = maprequest,
226 [PropertyNotify] = propertynotify,
227 [UnmapNotify] = unmapnotify
228};
229static Atom wmatom[WMLast], netatom[NetLast];
230static Bool otherwm;
231static Bool running = True;
232static Client *clients = NULL;
233static Client *sel = NULL;
234static Client *stack = NULL;
235static Cursor cursor[CurLast];
236static Display *dpy;
237static DC dc;
238static Layout *lt[] = { NULL, NULL };
239static Window root, barwin;
240/* configuration, allows nested code to access above variables */
241#include "config.h"
242
243/* compile-time check if all tags fit into an unsigned int bit array. */
244struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
245
246/* function implementations */
247void
248applyrules(Client *c) {
249 unsigned int i;
250 Rule *r;
251 XClassHint ch = { 0 };
252
253 /* rule matching */
254 c->isfloating = c->tags = 0;
255 if(XGetClassHint(dpy, c->win, &ch)) {
256 for(i = 0; i < LENGTH(rules); i++) {
257 r = &rules[i];
258 if((!r->title || strstr(c->name, r->title))
259 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
260 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
261 c->isfloating = r->isfloating;
262 c->tags |= r->tags;
263 }
264 }
265 if(ch.res_class)
266 XFree(ch.res_class);
267 if(ch.res_name)
268 XFree(ch.res_name);
269 }
270 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : tagset[seltags];
271}
272
273Bool
274applysizehints(Client *c, int *x, int *y, int *w, int *h) {
275 Bool baseismin;
276
277 /* set minimum possible */
278 *w = MAX(1, *w);
279 *h = MAX(1, *h);
280
281 if(*x > sx + sw)
282 *x = sw - WIDTH(c);
283 if(*y > sy + sh)
284 *y = sh - HEIGHT(c);
285 if(*x + *w + 2 * c->bw < sx)
286 *x = sx;
287 if(*y + *h + 2 * c->bw < sy)
288 *y = sy;
289 if(*h < bh)
290 *h = bh;
291 if(*w < bh)
292 *w = bh;
293
294 if(resizehints || c->isfloating) {
295 /* see last two sentences in ICCCM 4.1.2.3 */
296 baseismin = c->basew == c->minw && c->baseh == c->minh;
297
298 if(!baseismin) { /* temporarily remove base dimensions */
299 *w -= c->basew;
300 *h -= c->baseh;
301 }
302
303 /* adjust for aspect limits */
304 if(c->mina > 0 && c->maxa > 0) {
305 if(c->maxa < (float)*w / *h)
306 *w = *h * c->maxa;
307 else if(c->mina < (float)*h / *w)
308 *h = *w * c->mina;
309 }
310
311 if(baseismin) { /* increment calculation requires this */
312 *w -= c->basew;
313 *h -= c->baseh;
314 }
315
316 /* adjust for increment value */
317 if(c->incw)
318 *w -= *w % c->incw;
319 if(c->inch)
320 *h -= *h % c->inch;
321
322 /* restore base dimensions */
323 *w += c->basew;
324 *h += c->baseh;
325
326 *w = MAX(*w, c->minw);
327 *h = MAX(*h, c->minh);
328
329 if(c->maxw)
330 *w = MIN(*w, c->maxw);
331
332 if(c->maxh)
333 *h = MIN(*h, c->maxh);
334 }
335 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
336}
337
338void
339arrange(void) {
340 showhide(stack);
341 focus(NULL);
342 if(lt[sellt]->arrange)
343 lt[sellt]->arrange();
344 restack();
345}
346
347void
348attach(Client *c) {
349 c->next = clients;
350 clients = c;
351}
352
353void
354attachstack(Client *c) {
355 c->snext = stack;
356 stack = c;
357}
358
359void
360buttonpress(XEvent *e) {
361 unsigned int i, x, click;
362 Arg arg = {0};
363 Client *c;
364 XButtonPressedEvent *ev = &e->xbutton;
365
366 click = ClkRootWin;
367 if(ev->window == barwin) {
368 i = x = 0;
369 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
370 if(i < LENGTH(tags)) {
371 click = ClkTagBar;
372 arg.ui = 1 << i;
373 }
374 else if(ev->x < x + blw)
375 click = ClkLtSymbol;
376 else if(ev->x > wx + ww - TEXTW(stext))
377 click = ClkStatusText;
378 else
379 click = ClkWinTitle;
380 }
381 else if((c = getclient(ev->window))) {
382 focus(c);
383 click = ClkClientWin;
384 }
385
386 for(i = 0; i < LENGTH(buttons); i++)
387 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
388 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
389 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
390}
391
392void
393checkotherwm(void) {
394 otherwm = False;
395 xerrorxlib = XSetErrorHandler(xerrorstart);
396
397 /* this causes an error if some other window manager is running */
398 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
399 XSync(dpy, False);
400 if(otherwm)
401 die("dwm: another window manager is already running\n");
402 XSetErrorHandler(xerror);
403 XSync(dpy, False);
404}
405
406void
407cleanup(void) {
408 Arg a = {.ui = ~0};
409 Layout foo = { "", NULL };
410
411 view(&a);
412 lt[sellt] = &foo;
413 while(stack)
414 unmanage(stack);
415 if(dc.font.set)
416 XFreeFontSet(dpy, dc.font.set);
417 else
418 XFreeFont(dpy, dc.font.xfont);
419 XUngrabKey(dpy, AnyKey, AnyModifier, root);
420 XFreePixmap(dpy, dc.drawable);
421 XFreeGC(dpy, dc.gc);
422 XFreeCursor(dpy, cursor[CurNormal]);
423 XFreeCursor(dpy, cursor[CurResize]);
424 XFreeCursor(dpy, cursor[CurMove]);
425 XDestroyWindow(dpy, barwin);
426 XSync(dpy, False);
427 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
428}
429
430void
431clearurgent(Client *c) {
432 XWMHints *wmh;
433
434 c->isurgent = False;
435 if(!(wmh = XGetWMHints(dpy, c->win)))
436 return;
437 wmh->flags &= ~XUrgencyHint;
438 XSetWMHints(dpy, c->win, wmh);
439 XFree(wmh);
440}
441
442void
443configure(Client *c) {
444 XConfigureEvent ce;
445
446 ce.type = ConfigureNotify;
447 ce.display = dpy;
448 ce.event = c->win;
449 ce.window = c->win;
450 ce.x = c->x;
451 ce.y = c->y;
452 ce.width = c->w;
453 ce.height = c->h;
454 ce.border_width = c->bw;
455 ce.above = None;
456 ce.override_redirect = False;
457 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
458}
459
460void
461configurenotify(XEvent *e) {
462 XConfigureEvent *ev = &e->xconfigure;
463
464 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
465 sw = ev->width;
466 sh = ev->height;
467 updategeom();
468 updatebar();
469 arrange();
470 }
471}
472
473void
474configurerequest(XEvent *e) {
475 Client *c;
476 XConfigureRequestEvent *ev = &e->xconfigurerequest;
477 XWindowChanges wc;
478
479 if((c = getclient(ev->window))) {
480 if(ev->value_mask & CWBorderWidth)
481 c->bw = ev->border_width;
482 else if(c->isfloating || !lt[sellt]->arrange) {
483 if(ev->value_mask & CWX)
484 c->x = sx + ev->x;
485 if(ev->value_mask & CWY)
486 c->y = sy + ev->y;
487 if(ev->value_mask & CWWidth)
488 c->w = ev->width;
489 if(ev->value_mask & CWHeight)
490 c->h = ev->height;
491 if((c->x - sx + c->w) > sw && c->isfloating)
492 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
493 if((c->y - sy + c->h) > sh && c->isfloating)
494 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
495 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
496 configure(c);
497 if(ISVISIBLE(c))
498 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
499 }
500 else
501 configure(c);
502 }
503 else {
504 wc.x = ev->x;
505 wc.y = ev->y;
506 wc.width = ev->width;
507 wc.height = ev->height;
508 wc.border_width = ev->border_width;
509 wc.sibling = ev->above;
510 wc.stack_mode = ev->detail;
511 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
512 }
513 XSync(dpy, False);
514}
515
516void
517destroynotify(XEvent *e) {
518 Client *c;
519 XDestroyWindowEvent *ev = &e->xdestroywindow;
520
521 if((c = getclient(ev->window)))
522 unmanage(c);
523}
524
525void
526detach(Client *c) {
527 Client **tc;
528
529 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
530 *tc = c->next;
531}
532
533void
534detachstack(Client *c) {
535 Client **tc;
536
537 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
538 *tc = c->snext;
539}
540
541void
542die(const char *errstr, ...) {
543 va_list ap;
544
545 va_start(ap, errstr);
546 vfprintf(stderr, errstr, ap);
547 va_end(ap);
548 exit(EXIT_FAILURE);
549}
550
551void
552drawbar(void) {
553 int x;
554 unsigned int i, occ = 0, urg = 0;
555 unsigned long *col;
556 Client *c;
557
558 for(c = clients; c; c = c->next) {
559 occ |= c->tags;
560 if(c->isurgent)
561 urg |= c->tags;
562 }
563
564 dc.x = 0;
565 for(i = 0; i < LENGTH(tags); i++) {
566 dc.w = TEXTW(tags[i]);
567 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
568 drawtext(tags[i], col, urg & 1 << i);
569 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
570 dc.x += dc.w;
571 }
572 if(blw > 0) {
573 dc.w = blw;
574 drawtext(lt[sellt]->symbol, dc.norm, False);
575 x = dc.x + dc.w;
576 }
577 else
578 x = dc.x;
579 dc.w = TEXTW(stext);
580 dc.x = ww - dc.w;
581 if(dc.x < x) {
582 dc.x = x;
583 dc.w = ww - x;
584 }
585 drawtext(stext, dc.norm, False);
586 if((dc.w = dc.x - x) > bh) {
587 dc.x = x;
588 if(sel) {
589 drawtext(sel->name, dc.sel, False);
590 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
591 }
592 else
593 drawtext(NULL, dc.norm, False);
594 }
595 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
596 XSync(dpy, False);
597}
598
599void
600drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
601 int x;
602 XGCValues gcv;
603 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
604
605 gcv.foreground = col[invert ? ColBG : ColFG];
606 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
607 x = (dc.font.ascent + dc.font.descent + 2) / 4;
608 r.x = dc.x + 1;
609 r.y = dc.y + 1;
610 if(filled) {
611 r.width = r.height = x + 1;
612 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
613 }
614 else if(empty) {
615 r.width = r.height = x;
616 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
617 }
618}
619
620void
621drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
622 char buf[256];
623 int i, x, y, h, len, olen;
624 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
625
626 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
627 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
628 if(!text)
629 return;
630 olen = strlen(text);
631 h = dc.font.ascent + dc.font.descent;
632 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
633 x = dc.x + (h / 2);
634 /* shorten text if necessary */
635 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
636 if(!len)
637 return;
638 memcpy(buf, text, len);
639 if(len < olen)
640 for(i = len; i && i > len - 3; buf[--i] = '.');
641 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
642 if(dc.font.set)
643 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
644 else
645 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
646}
647
648void
649enternotify(XEvent *e) {
650 Client *c;
651 XCrossingEvent *ev = &e->xcrossing;
652
653 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
654 return;
655 if((c = getclient(ev->window)))
656 focus(c);
657 else
658 focus(NULL);
659}
660
661void
662expose(XEvent *e) {
663 XExposeEvent *ev = &e->xexpose;
664
665 if(ev->count == 0 && (ev->window == barwin))
666 drawbar();
667}
668
669void
670focus(Client *c) {
671 if(!c || !ISVISIBLE(c))
672 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
673 if(sel && sel != c) {
674 grabbuttons(sel, False);
675 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
676 }
677 if(c) {
678 if(c->isurgent)
679 clearurgent(c);
680 detachstack(c);
681 attachstack(c);
682 grabbuttons(c, True);
683 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
684 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
685 }
686 else
687 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
688 sel = c;
689 drawbar();
690}
691
692void
693focusin(XEvent *e) { /* there are some broken focus acquiring clients */
694 XFocusChangeEvent *ev = &e->xfocus;
695
696 if(sel && ev->window != sel->win)
697 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
698}
699
700void
701focusstack(const Arg *arg) {
702 Client *c = NULL, *i;
703
704 if(!sel)
705 return;
706 if (arg->i > 0) {
707 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
708 if(!c)
709 for(c = clients; c && !ISVISIBLE(c); c = c->next);
710 }
711 else {
712 for(i = clients; i != sel; i = i->next)
713 if(ISVISIBLE(i))
714 c = i;
715 if(!c)
716 for(; i; i = i->next)
717 if(ISVISIBLE(i))
718 c = i;
719 }
720 if(c) {
721 focus(c);
722 restack();
723 }
724}
725
726Client *
727getclient(Window w) {
728 Client *c;
729
730 for(c = clients; c && c->win != w; c = c->next);
731 return c;
732}
733
734unsigned long
735getcolor(const char *colstr) {
736 Colormap cmap = DefaultColormap(dpy, screen);
737 XColor color;
738
739 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
740 die("error, cannot allocate color '%s'\n", colstr);
741 return color.pixel;
742}
743
744long
745getstate(Window w) {
746 int format, status;
747 long result = -1;
748 unsigned char *p = NULL;
749 unsigned long n, extra;
750 Atom real;
751
752 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
753 &real, &format, &n, &extra, (unsigned char **)&p);
754 if(status != Success)
755 return -1;
756 if(n != 0)
757 result = *p;
758 XFree(p);
759 return result;
760}
761
762Bool
763gettextprop(Window w, Atom atom, char *text, unsigned int size) {
764 char **list = NULL;
765 int n;
766 XTextProperty name;
767
768 if(!text || size == 0)
769 return False;
770 text[0] = '\0';
771 XGetTextProperty(dpy, w, &name, atom);
772 if(!name.nitems)
773 return False;
774 if(name.encoding == XA_STRING)
775 strncpy(text, (char *)name.value, size - 1);
776 else {
777 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
778 && n > 0 && *list) {
779 strncpy(text, *list, size - 1);
780 XFreeStringList(list);
781 }
782 }
783 text[size - 1] = '\0';
784 XFree(name.value);
785 return True;
786}
787
788void
789grabbuttons(Client *c, Bool focused) {
790 updatenumlockmask();
791 {
792 unsigned int i, j;
793 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
794 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
795 if(focused) {
796 for(i = 0; i < LENGTH(buttons); i++)
797 if(buttons[i].click == ClkClientWin)
798 for(j = 0; j < LENGTH(modifiers); j++)
799 XGrabButton(dpy, buttons[i].button,
800 buttons[i].mask | modifiers[j],
801 c->win, False, BUTTONMASK,
802 GrabModeAsync, GrabModeSync, None, None);
803 } else
804 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
805 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
806 }
807}
808
809void
810grabkeys(void) {
811 updatenumlockmask();
812 { /* grab keys */
813 unsigned int i, j;
814 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
815 KeyCode code;
816
817 XUngrabKey(dpy, AnyKey, AnyModifier, root);
818 for(i = 0; i < LENGTH(keys); i++) {
819 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
820 for(j = 0; j < LENGTH(modifiers); j++)
821 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
822 True, GrabModeAsync, GrabModeAsync);
823 }
824 }
825}
826
827void
828initfont(const char *fontstr) {
829 char *def, **missing;
830 int i, n;
831
832 missing = NULL;
833 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
834 if(missing) {
835 while(n--)
836 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
837 XFreeStringList(missing);
838 }
839 if(dc.font.set) {
840 XFontSetExtents *font_extents;
841 XFontStruct **xfonts;
842 char **font_names;
843 dc.font.ascent = dc.font.descent = 0;
844 font_extents = XExtentsOfFontSet(dc.font.set);
845 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
846 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
847 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
848 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
849 xfonts++;
850 }
851 }
852 else {
853 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
854 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
855 die("error, cannot load font: '%s'\n", fontstr);
856 dc.font.ascent = dc.font.xfont->ascent;
857 dc.font.descent = dc.font.xfont->descent;
858 }
859 dc.font.height = dc.font.ascent + dc.font.descent;
860}
861
862Bool
863isprotodel(Client *c) {
864 int i, n;
865 Atom *protocols;
866 Bool ret = False;
867
868 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
869 for(i = 0; !ret && i < n; i++)
870 if(protocols[i] == wmatom[WMDelete])
871 ret = True;
872 XFree(protocols);
873 }
874 return ret;
875}
876
877void
878keypress(XEvent *e) {
879 unsigned int i;
880 KeySym keysym;
881 XKeyEvent *ev;
882
883 ev = &e->xkey;
884 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
885 for(i = 0; i < LENGTH(keys); i++)
886 if(keysym == keys[i].keysym
887 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
888 && keys[i].func)
889 keys[i].func(&(keys[i].arg));
890}
891
892void
893killclient(const Arg *arg) {
894 XEvent ev;
895
896 if(!sel)
897 return;
898 if(isprotodel(sel)) {
899 ev.type = ClientMessage;
900 ev.xclient.window = sel->win;
901 ev.xclient.message_type = wmatom[WMProtocols];
902 ev.xclient.format = 32;
903 ev.xclient.data.l[0] = wmatom[WMDelete];
904 ev.xclient.data.l[1] = CurrentTime;
905 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
906 }
907 else
908 XKillClient(dpy, sel->win);
909}
910
911void
912manage(Window w, XWindowAttributes *wa) {
913 static Client cz;
914 Client *c, *t = NULL;
915 Window trans = None;
916 XWindowChanges wc;
917
918 if(!(c = malloc(sizeof(Client))))
919 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
920 *c = cz;
921 c->win = w;
922
923 /* geometry */
924 c->x = wa->x;
925 c->y = wa->y;
926 c->w = wa->width;
927 c->h = wa->height;
928 c->oldbw = wa->border_width;
929 if(c->w == sw && c->h == sh) {
930 c->x = sx;
931 c->y = sy;
932 c->bw = 0;
933 }
934 else {
935 if(c->x + WIDTH(c) > sx + sw)
936 c->x = sx + sw - WIDTH(c);
937 if(c->y + HEIGHT(c) > sy + sh)
938 c->y = sy + sh - HEIGHT(c);
939 c->x = MAX(c->x, sx);
940 /* only fix client y-offset, if the client center might cover the bar */
941 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx)
942 && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
943 c->bw = borderpx;
944 }
945
946 wc.border_width = c->bw;
947 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
948 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
949 configure(c); /* propagates border_width, if size doesn't change */
950 updatesizehints(c);
951 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
952 grabbuttons(c, False);
953 updatetitle(c);
954 if(XGetTransientForHint(dpy, w, &trans))
955 t = getclient(trans);
956 if(t)
957 c->tags = t->tags;
958 else
959 applyrules(c);
960 if(!c->isfloating)
961 c->isfloating = trans != None || c->isfixed;
962 if(c->isfloating)
963 XRaiseWindow(dpy, c->win);
964 attach(c);
965 attachstack(c);
966 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
967 XMapWindow(dpy, c->win);
968 setclientstate(c, NormalState);
969 arrange();
970}
971
972void
973mappingnotify(XEvent *e) {
974 XMappingEvent *ev = &e->xmapping;
975
976 XRefreshKeyboardMapping(ev);
977 if(ev->request == MappingKeyboard)
978 grabkeys();
979}
980
981void
982maprequest(XEvent *e) {
983 static XWindowAttributes wa;
984 XMapRequestEvent *ev = &e->xmaprequest;
985
986 if(!XGetWindowAttributes(dpy, ev->window, &wa))
987 return;
988 if(wa.override_redirect)
989 return;
990 if(!getclient(ev->window))
991 manage(ev->window, &wa);
992}
993
994void
995monocle(void) {
996 Client *c;
997
998 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
999 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
1000 }
1001}
1002
1003void
1004movemouse(const Arg *arg) {
1005 int x, y, ocx, ocy, di, nx, ny;
1006 unsigned int dui;
1007 Client *c;
1008 Window dummy;
1009 XEvent ev;
1010
1011 if(!(c = sel))
1012 return;
1013 restack();
1014 ocx = c->x;
1015 ocy = c->y;
1016 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1017 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1018 return;
1019 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
1020 do {
1021 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1022 switch (ev.type) {
1023 case ConfigureRequest:
1024 case Expose:
1025 case MapRequest:
1026 handler[ev.type](&ev);
1027 break;
1028 case MotionNotify:
1029 nx = ocx + (ev.xmotion.x - x);
1030 ny = ocy + (ev.xmotion.y - y);
1031 if(snap && nx >= wx && nx <= wx + ww
1032 && ny >= wy && ny <= wy + wh) {
1033 if(abs(wx - nx) < snap)
1034 nx = wx;
1035 else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
1036 nx = wx + ww - WIDTH(c);
1037 if(abs(wy - ny) < snap)
1038 ny = wy;
1039 else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
1040 ny = wy + wh - HEIGHT(c);
1041 if(!c->isfloating && lt[sellt]->arrange
1042 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1043 togglefloating(NULL);
1044 }
1045 if(!lt[sellt]->arrange || c->isfloating)
1046 resize(c, nx, ny, c->w, c->h);
1047 break;
1048 }
1049 }
1050 while(ev.type != ButtonRelease);
1051 XUngrabPointer(dpy, CurrentTime);
1052}
1053
1054Client *
1055nexttiled(Client *c) {
1056 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1057 return c;
1058}
1059
1060void
1061propertynotify(XEvent *e) {
1062 Client *c;
1063 Window trans;
1064 XPropertyEvent *ev = &e->xproperty;
1065
1066 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1067 updatestatus();
1068 else if(ev->state == PropertyDelete)
1069 return; /* ignore */
1070 else if((c = getclient(ev->window))) {
1071 switch (ev->atom) {
1072 default: break;
1073 case XA_WM_TRANSIENT_FOR:
1074 XGetTransientForHint(dpy, c->win, &trans);
1075 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1076 arrange();
1077 break;
1078 case XA_WM_NORMAL_HINTS:
1079 updatesizehints(c);
1080 break;
1081 case XA_WM_HINTS:
1082 updatewmhints(c);
1083 drawbar();
1084 break;
1085 }
1086 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1087 updatetitle(c);
1088 if(c == sel)
1089 drawbar();
1090 }
1091 }
1092}
1093
1094void
1095quit(const Arg *arg) {
1096 running = False;
1097}
1098
1099void
1100resize(Client *c, int x, int y, int w, int h) {
1101 XWindowChanges wc;
1102
1103 if(applysizehints(c, &x, &y, &w, &h)) {
1104 c->x = wc.x = x;
1105 c->y = wc.y = y;
1106 c->w = wc.width = w;
1107 c->h = wc.height = h;
1108 wc.border_width = c->bw;
1109 XConfigureWindow(dpy, c->win,
1110 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1111 configure(c);
1112 XSync(dpy, False);
1113 }
1114}
1115
1116void
1117resizemouse(const Arg *arg) {
1118 int ocx, ocy;
1119 int nw, nh;
1120 Client *c;
1121 XEvent ev;
1122
1123 if(!(c = sel))
1124 return;
1125 restack();
1126 ocx = c->x;
1127 ocy = c->y;
1128 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1129 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1130 return;
1131 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1132 do {
1133 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1134 switch(ev.type) {
1135 case ConfigureRequest:
1136 case Expose:
1137 case MapRequest:
1138 handler[ev.type](&ev);
1139 break;
1140 case MotionNotify:
1141 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1142 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1143
1144 if(snap && nw >= wx && nw <= wx + ww
1145 && nh >= wy && nh <= wy + wh) {
1146 if(!c->isfloating && lt[sellt]->arrange
1147 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1148 togglefloating(NULL);
1149 }
1150 if(!lt[sellt]->arrange || c->isfloating)
1151 resize(c, c->x, c->y, nw, nh);
1152 break;
1153 }
1154 }
1155 while(ev.type != ButtonRelease);
1156 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1157 XUngrabPointer(dpy, CurrentTime);
1158 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1159}
1160
1161void
1162restack(void) {
1163 Client *c;
1164 XEvent ev;
1165 XWindowChanges wc;
1166
1167 drawbar();
1168 if(!sel)
1169 return;
1170 if(sel->isfloating || !lt[sellt]->arrange)
1171 XRaiseWindow(dpy, sel->win);
1172 if(lt[sellt]->arrange) {
1173 wc.stack_mode = Below;
1174 wc.sibling = barwin;
1175 for(c = stack; c; c = c->snext)
1176 if(!c->isfloating && ISVISIBLE(c)) {
1177 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1178 wc.sibling = c->win;
1179 }
1180 }
1181 XSync(dpy, False);
1182 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1183}
1184
1185void
1186run(void) {
1187 XEvent ev;
1188
1189 /* main event loop */
1190 XSync(dpy, False);
1191 while(running && !XNextEvent(dpy, &ev)) {
1192 if(handler[ev.type])
1193 (handler[ev.type])(&ev); /* call handler */
1194 }
1195}
1196
1197void
1198scan(void) {
1199 unsigned int i, num;
1200 Window d1, d2, *wins = NULL;
1201 XWindowAttributes wa;
1202
1203 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1204 for(i = 0; i < num; i++) {
1205 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1206 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1207 continue;
1208 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1209 manage(wins[i], &wa);
1210 }
1211 for(i = 0; i < num; i++) { /* now the transients */
1212 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1213 continue;
1214 if(XGetTransientForHint(dpy, wins[i], &d1)
1215 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1216 manage(wins[i], &wa);
1217 }
1218 if(wins)
1219 XFree(wins);
1220 }
1221}
1222
1223void
1224setclientstate(Client *c, long state) {
1225 long data[] = {state, None};
1226
1227 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1228 PropModeReplace, (unsigned char *)data, 2);
1229}
1230
1231void
1232setlayout(const Arg *arg) {
1233 if(!arg || !arg->v || arg->v != lt[sellt])
1234 sellt ^= 1;
1235 if(arg && arg->v)
1236 lt[sellt] = (Layout *)arg->v;
1237 if(sel)
1238 arrange();
1239 else
1240 drawbar();
1241}
1242
1243/* arg > 1.0 will set mfact absolutly */
1244void
1245setmfact(const Arg *arg) {
1246 float f;
1247
1248 if(!arg || !lt[sellt]->arrange)
1249 return;
1250 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1251 if(f < 0.1 || f > 0.9)
1252 return;
1253 mfact = f;
1254 arrange();
1255}
1256
1257void
1258setup(void) {
1259 unsigned int i;
1260 int w;
1261 XSetWindowAttributes wa;
1262
1263 /* init screen */
1264 screen = DefaultScreen(dpy);
1265 root = RootWindow(dpy, screen);
1266 initfont(font);
1267 sx = 0;
1268 sy = 0;
1269 sw = DisplayWidth(dpy, screen);
1270 sh = DisplayHeight(dpy, screen);
1271 bh = dc.h = dc.font.height + 2;
1272 lt[0] = &layouts[0];
1273 lt[1] = &layouts[1 % LENGTH(layouts)];
1274 updategeom();
1275
1276 /* init atoms */
1277 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1278 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1279 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1280 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1281 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1282
1283 /* init cursors */
1284 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1285 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1286 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1287
1288 /* init appearance */
1289 dc.norm[ColBorder] = getcolor(normbordercolor);
1290 dc.norm[ColBG] = getcolor(normbgcolor);
1291 dc.norm[ColFG] = getcolor(normfgcolor);
1292 dc.sel[ColBorder] = getcolor(selbordercolor);
1293 dc.sel[ColBG] = getcolor(selbgcolor);
1294 dc.sel[ColFG] = getcolor(selfgcolor);
1295 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1296 dc.gc = XCreateGC(dpy, root, 0, NULL);
1297 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1298 if(!dc.font.set)
1299 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1300
1301 /* init bar */
1302 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1303 w = TEXTW(layouts[i].symbol);
1304 blw = MAX(blw, w);
1305 }
1306
1307 wa.override_redirect = True;
1308 wa.background_pixmap = ParentRelative;
1309 wa.event_mask = ButtonPressMask|ExposureMask;
1310
1311 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1312 CopyFromParent, DefaultVisual(dpy, screen),
1313 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1314 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1315 XMapRaised(dpy, barwin);
1316 updatestatus();
1317
1318 /* EWMH support per view */
1319 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1320 PropModeReplace, (unsigned char *) netatom, NetLast);
1321
1322 /* select for events */
1323 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1324 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1325 |PropertyChangeMask;
1326 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1327 XSelectInput(dpy, root, wa.event_mask);
1328
1329 grabkeys();
1330}
1331
1332void
1333showhide(Client *c) {
1334 if(!c)
1335 return;
1336 if(ISVISIBLE(c)) { /* show clients top down */
1337 XMoveWindow(dpy, c->win, c->x, c->y);
1338 if(!lt[sellt]->arrange || c->isfloating)
1339 resize(c, c->x, c->y, c->w, c->h);
1340 showhide(c->snext);
1341 }
1342 else { /* hide clients bottom up */
1343 showhide(c->snext);
1344 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1345 }
1346}
1347
1348
1349void
1350sigchld(int signal) {
1351 while(0 < waitpid(-1, NULL, WNOHANG));
1352}
1353
1354void
1355spawn(const Arg *arg) {
1356 signal(SIGCHLD, sigchld);
1357 if(fork() == 0) {
1358 if(dpy)
1359 close(ConnectionNumber(dpy));
1360 setsid();
1361 execvp(((char **)arg->v)[0], (char **)arg->v);
1362 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1363 perror(" failed");
1364 exit(0);
1365 }
1366}
1367
1368void
1369tag(const Arg *arg) {
1370 if(sel && arg->ui & TAGMASK) {
1371 sel->tags = arg->ui & TAGMASK;
1372 arrange();
1373 }
1374}
1375
1376int
1377textnw(const char *text, unsigned int len) {
1378 XRectangle r;
1379
1380 if(dc.font.set) {
1381 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1382 return r.width;
1383 }
1384 return XTextWidth(dc.font.xfont, text, len);
1385}
1386
1387void
1388tile(void) {
1389 int x, y, h, w, mw;
1390 unsigned int i, n;
1391 Client *c;
1392
1393 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1394 if(n == 0)
1395 return;
1396
1397 /* master */
1398 c = nexttiled(clients);
1399 mw = mfact * ww;
1400 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw);
1401
1402 if(--n == 0)
1403 return;
1404
1405 /* tile stack */
1406 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1407 y = wy;
1408 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1409 h = wh / n;
1410 if(h < bh)
1411 h = wh;
1412
1413 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1414 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1415 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw));
1416 if(h != wh)
1417 y = c->y + HEIGHT(c);
1418 }
1419}
1420
1421void
1422togglebar(const Arg *arg) {
1423 showbar = !showbar;
1424 updategeom();
1425 updatebar();
1426 arrange();
1427}
1428
1429void
1430togglefloating(const Arg *arg) {
1431 if(!sel)
1432 return;
1433 sel->isfloating = !sel->isfloating || sel->isfixed;
1434 if(sel->isfloating)
1435 resize(sel, sel->x, sel->y, sel->w, sel->h);
1436 arrange();
1437}
1438
1439void
1440toggletag(const Arg *arg) {
1441 unsigned int mask;
1442
1443 if (!sel)
1444 return;
1445
1446 mask = sel->tags ^ (arg->ui & TAGMASK);
1447 if(mask) {
1448 sel->tags = mask;
1449 arrange();
1450 }
1451}
1452
1453void
1454toggleview(const Arg *arg) {
1455 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1456
1457 if(mask) {
1458 tagset[seltags] = mask;
1459 arrange();
1460 }
1461}
1462
1463void
1464unmanage(Client *c) {
1465 XWindowChanges wc;
1466
1467 wc.border_width = c->oldbw;
1468 /* The server grab construct avoids race conditions. */
1469 XGrabServer(dpy);
1470 XSetErrorHandler(xerrordummy);
1471 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1472 detach(c);
1473 detachstack(c);
1474 if(sel == c)
1475 focus(NULL);
1476 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1477 setclientstate(c, WithdrawnState);
1478 free(c);
1479 XSync(dpy, False);
1480 XSetErrorHandler(xerror);
1481 XUngrabServer(dpy);
1482 arrange();
1483}
1484
1485void
1486unmapnotify(XEvent *e) {
1487 Client *c;
1488 XUnmapEvent *ev = &e->xunmap;
1489
1490 if((c = getclient(ev->window)))
1491 unmanage(c);
1492}
1493
1494void
1495updatebar(void) {
1496 if(dc.drawable != 0)
1497 XFreePixmap(dpy, dc.drawable);
1498 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1499 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1500}
1501
1502void
1503updategeom(void) {
1504#ifdef XINERAMA
1505 int n, i = 0;
1506 XineramaScreenInfo *info = NULL;
1507
1508 /* window area geometry */
1509 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1510 if(n > 1) {
1511 int di, x, y;
1512 unsigned int dui;
1513 Window dummy;
1514 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1515 for(i = 0; i < n; i++)
1516 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1517 break;
1518 }
1519 wx = info[i].x_org;
1520 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1521 ww = info[i].width;
1522 wh = showbar ? info[i].height - bh : info[i].height;
1523 XFree(info);
1524 }
1525 else
1526#endif
1527 {
1528 wx = sx;
1529 wy = showbar && topbar ? sy + bh : sy;
1530 ww = sw;
1531 wh = showbar ? sh - bh : sh;
1532 }
1533
1534 /* bar position */
1535 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1536}
1537
1538void
1539updatenumlockmask(void) {
1540 unsigned int i, j;
1541 XModifierKeymap *modmap;
1542
1543 numlockmask = 0;
1544 modmap = XGetModifierMapping(dpy);
1545 for(i = 0; i < 8; i++)
1546 for(j = 0; j < modmap->max_keypermod; j++)
1547 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1548 == XKeysymToKeycode(dpy, XK_Num_Lock))
1549 numlockmask = (1 << i);
1550 XFreeModifiermap(modmap);
1551}
1552
1553void
1554updatesizehints(Client *c) {
1555 long msize;
1556 XSizeHints size;
1557
1558 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1559 /* size is uninitialized, ensure that size.flags aren't used */
1560 size.flags = PSize;
1561 if(size.flags & PBaseSize) {
1562 c->basew = size.base_width;
1563 c->baseh = size.base_height;
1564 }
1565 else if(size.flags & PMinSize) {
1566 c->basew = size.min_width;
1567 c->baseh = size.min_height;
1568 }
1569 else
1570 c->basew = c->baseh = 0;
1571 if(size.flags & PResizeInc) {
1572 c->incw = size.width_inc;
1573 c->inch = size.height_inc;
1574 }
1575 else
1576 c->incw = c->inch = 0;
1577 if(size.flags & PMaxSize) {
1578 c->maxw = size.max_width;
1579 c->maxh = size.max_height;
1580 }
1581 else
1582 c->maxw = c->maxh = 0;
1583 if(size.flags & PMinSize) {
1584 c->minw = size.min_width;
1585 c->minh = size.min_height;
1586 }
1587 else if(size.flags & PBaseSize) {
1588 c->minw = size.base_width;
1589 c->minh = size.base_height;
1590 }
1591 else
1592 c->minw = c->minh = 0;
1593 if(size.flags & PAspect) {
1594 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1595 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1596 }
1597 else
1598 c->maxa = c->mina = 0.0;
1599 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1600 && c->maxw == c->minw && c->maxh == c->minh);
1601}
1602
1603void
1604updatetitle(Client *c) {
1605 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1606 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1607}
1608
1609void
1610updatestatus() {
1611 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1612 strcpy(stext, "dwm-"VERSION);
1613 drawbar();
1614}
1615
1616void
1617updatewmhints(Client *c) {
1618 XWMHints *wmh;
1619
1620 if((wmh = XGetWMHints(dpy, c->win))) {
1621 if(c == sel && wmh->flags & XUrgencyHint) {
1622 wmh->flags &= ~XUrgencyHint;
1623 XSetWMHints(dpy, c->win, wmh);
1624 }
1625 else
1626 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1627
1628 XFree(wmh);
1629 }
1630}
1631
1632void
1633view(const Arg *arg) {
1634 if((arg->ui & TAGMASK) == tagset[seltags])
1635 return;
1636 seltags ^= 1; /* toggle sel tagset */
1637 if(arg->ui & TAGMASK)
1638 tagset[seltags] = arg->ui & TAGMASK;
1639 arrange();
1640}
1641
1642/* There's no way to check accesses to destroyed windows, thus those cases are
1643 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1644 * default error handler, which may call exit. */
1645int
1646xerror(Display *dpy, XErrorEvent *ee) {
1647 if(ee->error_code == BadWindow
1648 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1649 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1650 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1651 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1652 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1653 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1654 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1655 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1656 return 0;
1657 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1658 ee->request_code, ee->error_code);
1659 return xerrorxlib(dpy, ee); /* may call exit */
1660}
1661
1662int
1663xerrordummy(Display *dpy, XErrorEvent *ee) {
1664 return 0;
1665}
1666
1667/* Startup Error handler to check if another window manager
1668 * is already running. */
1669int
1670xerrorstart(Display *dpy, XErrorEvent *ee) {
1671 otherwm = True;
1672 return -1;
1673}
1674
1675void
1676zoom(const Arg *arg) {
1677 Client *c = sel;
1678
1679 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1680 return;
1681 if(c == nexttiled(clients))
1682 if(!c || !(c = nexttiled(c->next)))
1683 return;
1684 detach(c);
1685 attach(c);
1686 focus(c);
1687 arrange();
1688}
1689
1690int
1691main(int argc, char *argv[]) {
1692 if(argc == 2 && !strcmp("-v", argv[1]))
1693 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1694 else if(argc != 1)
1695 die("usage: dwm [-v]\n");
1696
1697 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1698 fputs("warning: no locale support\n", stderr);
1699
1700 if(!(dpy = XOpenDisplay(NULL)))
1701 die("dwm: cannot open display\n");
1702
1703 checkotherwm();
1704 setup();
1705 scan();
1706 run();
1707 cleanup();
1708
1709 XCloseDisplay(dpy);
1710 return 0;
1711}