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 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client. For each client dwm
21 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
22 * properties are updated or the client is moved/resized.
23 *
24 * Keys and tagging rules are organized as arrays and defined in the config.h
25 * file. These arrays are kept static in event.o and tag.o respectively,
26 * because no other part of dwm needs access to them. The current layout is
27 * represented by the lt pointer.
28 *
29 * To understand everything else, start reading main().
30 */
31#include <errno.h>
32#include <locale.h>
33#include <regex.h>
34#include <stdarg.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <sys/select.h>
40#include <sys/wait.h>
41#include <X11/cursorfont.h>
42#include <X11/keysym.h>
43#include <X11/Xatom.h>
44#include <X11/Xproto.h>
45#include <X11/Xutil.h>
46
47/* macros */
48#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
49#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
50#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
51
52/* enums */
53enum { BarTop, BarBot, BarOff }; /* bar position */
54enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
55enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
56enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
57enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
58
59/* typedefs */
60typedef struct Client Client;
61struct Client {
62 char name[256];
63 int x, y, w, h;
64 int rx, ry, rw, rh; /* revert geometry */
65 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
66 int minax, maxax, minay, maxay;
67 long flags;
68 unsigned int border, oldborder;
69 Bool isbanned, isfixed, ismax, isfloating;
70 Bool *tags;
71 Client *next;
72 Client *prev;
73 Client *snext;
74 Window win;
75};
76
77typedef struct {
78 int x, y, w, h;
79 unsigned long norm[ColLast];
80 unsigned long sel[ColLast];
81 Drawable drawable;
82 GC gc;
83 struct {
84 int ascent;
85 int descent;
86 int height;
87 XFontSet set;
88 XFontStruct *xfont;
89 } font;
90} DC; /* draw context */
91
92typedef struct {
93 unsigned long mod;
94 KeySym keysym;
95 void (*func)(const char *arg);
96 const char *arg;
97} Key;
98
99typedef struct {
100 const char *symbol;
101 void (*arrange)(void);
102} Layout;
103
104typedef struct {
105 const char *prop;
106 const char *tags;
107 Bool isfloating;
108} Rule;
109
110typedef struct {
111 regex_t *propregex;
112 regex_t *tagregex;
113} Regs;
114
115/* functions */
116
117static void applyrules(Client *c);
118static void arrange(void);
119static void attach(Client *c);
120static void attachstack(Client *c);
121static void ban(Client *c);
122static void buttonpress(XEvent *e);
123static void cleanup(void);
124static void compileregs(void);
125static void configure(Client *c);
126static void configurenotify(XEvent *e);
127static void configurerequest(XEvent *e);
128static void destroynotify(XEvent *e);
129static void detach(Client *c);
130static void detachstack(Client *c);
131static void drawbar(void);
132static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
133static void drawtext(const char *text, unsigned long col[ColLast]);
134static void *emallocz(unsigned int size);
135static void enternotify(XEvent *e);
136static void eprint(const char *errstr, ...);
137static void expose(XEvent *e);
138static void floating(void); /* default floating layout */
139static void focus(Client *c);
140static void focusnext(const char *arg);
141static void focusprev(const char *arg);
142static Client *getclient(Window w);
143static long getstate(Window w);
144static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
145static void grabbuttons(Client *c, Bool focused);
146static unsigned int idxoftag(const char *tag);
147static void initbar(void);
148static unsigned long initcolor(const char *colstr);
149static void initfont(const char *fontstr);
150static void initlayouts(void);
151static void initstyle(void);
152static Bool isarrange(void (*func)());
153static Bool isfloating(void);
154static Bool isoccupied(unsigned int t);
155static Bool isprotodel(Client *c);
156static Bool isvisible(Client *c);
157static void keypress(XEvent *e);
158static void killclient(const char *arg);
159static void leavenotify(XEvent *e);
160static void manage(Window w, XWindowAttributes *wa);
161static void mappingnotify(XEvent *e);
162static void maprequest(XEvent *e);
163static void movemouse(Client *c);
164static Client *nexttiled(Client *c);
165static void propertynotify(XEvent *e);
166static void quit(const char *arg);
167static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
168static void resizemouse(Client *c);
169static void restack(void);
170static void scan(void);
171static void setclientstate(Client *c, long state);
172static void setlayout(const char *arg);
173static void setmwfact(const char *arg);
174static void setup(void);
175static void spawn(const char *arg);
176static void tag(const char *arg);
177static unsigned int textnw(const char *text, unsigned int len);
178static unsigned int textw(const char *text);
179static void tile(void);
180static void togglebar(const char *arg);
181static void togglefloating(const char *arg);
182static void togglemax(const char *arg);
183static void toggletag(const char *arg);
184static void toggleview(const char *arg);
185static void unban(Client *c);
186static void unmanage(Client *c);
187static void unmapnotify(XEvent *e);
188static void updatebarpos(void);
189static void updatesizehints(Client *c);
190static void updatetitle(Client *c);
191static void view(const char *arg);
192static int xerror(Display *dpy, XErrorEvent *ee);
193static int xerrordummy(Display *dsply, XErrorEvent *ee);
194static int xerrorstart(Display *dsply, XErrorEvent *ee);
195static void zoom(const char *arg);
196
197#include "config.h"
198
199/* variables */
200static char stext[256];
201static double mwfact = MWFACT;
202static int screen, sx, sy, sw, sh, wax, way, waw, wah;
203static int (*xerrorxlib)(Display *, XErrorEvent *);
204static unsigned int bh;
205static unsigned int blw = 0;
206static unsigned int bpos = BARPOS;
207static unsigned int ltidx = 0; /* default */
208static unsigned int nlayouts = 0;
209static unsigned int nrules = 0;
210static unsigned int ntags;
211static unsigned int numlockmask = 0;
212static void (*handler[LASTEvent]) (XEvent *) = {
213 [ButtonPress] = buttonpress,
214 [ConfigureRequest] = configurerequest,
215 [ConfigureNotify] = configurenotify,
216 [DestroyNotify] = destroynotify,
217 [EnterNotify] = enternotify,
218 [LeaveNotify] = leavenotify,
219 [Expose] = expose,
220 [KeyPress] = keypress,
221 [MappingNotify] = mappingnotify,
222 [MapRequest] = maprequest,
223 [PropertyNotify] = propertynotify,
224 [UnmapNotify] = unmapnotify
225};
226static Atom wmatom[WMLast], netatom[NetLast];
227static Bool otherwm, readin;
228static Bool running = True;
229static Bool *seltags;
230static Bool selscreen = True;
231static Client *clients = NULL;
232static Client *sel = NULL;
233static Client *stack = NULL;
234static Cursor cursor[CurLast];
235static Display *dpy;
236static DC dc = {0};
237static Window barwin, root;
238static Regs *regs = NULL;
239
240static void
241eprint(const char *errstr, ...) {
242 va_list ap;
243
244 va_start(ap, errstr);
245 vfprintf(stderr, errstr, ap);
246 va_end(ap);
247 exit(EXIT_FAILURE);
248}
249
250static void *
251emallocz(unsigned int size) {
252 void *res = calloc(1, size);
253
254 if(!res)
255 eprint("fatal: could not malloc() %u bytes\n", size);
256 return res;
257}
258
259static void
260spawn(const char *arg) {
261 static char *shell = NULL;
262
263 if(!shell && !(shell = getenv("SHELL")))
264 shell = "/bin/sh";
265 if(!arg)
266 return;
267 /* The double-fork construct avoids zombie processes and keeps the code
268 * clean from stupid signal handlers. */
269 if(fork() == 0) {
270 if(fork() == 0) {
271 if(dpy)
272 close(ConnectionNumber(dpy));
273 setsid();
274 execl(shell, shell, "-c", arg, (char *)NULL);
275 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
276 perror(" failed");
277 }
278 exit(0);
279 }
280 wait(0);
281}
282
283static void
284drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
285 int x;
286 XGCValues gcv;
287 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
288
289 gcv.foreground = col[ColFG];
290 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
291 x = (dc.font.ascent + dc.font.descent + 2) / 4;
292 r.x = dc.x + 1;
293 r.y = dc.y + 1;
294 if(filled) {
295 r.width = r.height = x + 1;
296 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
297 }
298 else if(empty) {
299 r.width = r.height = x;
300 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
301 }
302}
303
304static unsigned long
305initcolor(const char *colstr) {
306 Colormap cmap = DefaultColormap(dpy, screen);
307 XColor color;
308
309 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
310 eprint("error, cannot allocate color '%s'\n", colstr);
311 return color.pixel;
312}
313
314static void
315initfont(const char *fontstr) {
316 char *def, **missing;
317 int i, n;
318
319 missing = NULL;
320 if(dc.font.set)
321 XFreeFontSet(dpy, dc.font.set);
322 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
323 if(missing) {
324 while(n--)
325 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
326 XFreeStringList(missing);
327 }
328 if(dc.font.set) {
329 XFontSetExtents *font_extents;
330 XFontStruct **xfonts;
331 char **font_names;
332 dc.font.ascent = dc.font.descent = 0;
333 font_extents = XExtentsOfFontSet(dc.font.set);
334 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
335 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
336 if(dc.font.ascent < (*xfonts)->ascent)
337 dc.font.ascent = (*xfonts)->ascent;
338 if(dc.font.descent < (*xfonts)->descent)
339 dc.font.descent = (*xfonts)->descent;
340 xfonts++;
341 }
342 }
343 else {
344 if(dc.font.xfont)
345 XFreeFont(dpy, dc.font.xfont);
346 dc.font.xfont = NULL;
347 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
348 || !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
349 eprint("error, cannot load font: '%s'\n", fontstr);
350 dc.font.ascent = dc.font.xfont->ascent;
351 dc.font.descent = dc.font.xfont->descent;
352 }
353 dc.font.height = dc.font.ascent + dc.font.descent;
354}
355
356static Bool
357isoccupied(unsigned int t) {
358 Client *c;
359
360 for(c = clients; c; c = c->next)
361 if(c->tags[t])
362 return True;
363 return False;
364}
365
366static unsigned int
367textnw(const char *text, unsigned int len) {
368 XRectangle r;
369
370 if(dc.font.set) {
371 XmbTextExtents(dc.font.set, text, len, NULL, &r);
372 return r.width;
373 }
374 return XTextWidth(dc.font.xfont, text, len);
375}
376
377static void
378drawtext(const char *text, unsigned long col[ColLast]) {
379 int x, y, w, h;
380 static char buf[256];
381 unsigned int len, olen;
382 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
383
384 XSetForeground(dpy, dc.gc, col[ColBG]);
385 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
386 if(!text)
387 return;
388 w = 0;
389 olen = len = strlen(text);
390 if(len >= sizeof buf)
391 len = sizeof buf - 1;
392 memcpy(buf, text, len);
393 buf[len] = 0;
394 h = dc.font.ascent + dc.font.descent;
395 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
396 x = dc.x + (h / 2);
397 /* shorten text if necessary */
398 while(len && (w = textnw(buf, len)) > dc.w - h)
399 buf[--len] = 0;
400 if(len < olen) {
401 if(len > 1)
402 buf[len - 1] = '.';
403 if(len > 2)
404 buf[len - 2] = '.';
405 if(len > 3)
406 buf[len - 3] = '.';
407 }
408 if(w > dc.w)
409 return; /* too long */
410 XSetForeground(dpy, dc.gc, col[ColFG]);
411 if(dc.font.set)
412 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
413 else
414 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
415}
416
417static void
418drawbar(void) {
419 int i, x;
420
421 dc.x = dc.y = 0;
422 for(i = 0; i < ntags; i++) {
423 dc.w = textw(tags[i]);
424 if(seltags[i]) {
425 drawtext(tags[i], dc.sel);
426 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
427 }
428 else {
429 drawtext(tags[i], dc.norm);
430 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
431 }
432 dc.x += dc.w;
433 }
434 dc.w = blw;
435 drawtext(layouts[ltidx].symbol, dc.norm);
436 x = dc.x + dc.w;
437 dc.w = textw(stext);
438 dc.x = sw - dc.w;
439 if(dc.x < x) {
440 dc.x = x;
441 dc.w = sw - x;
442 }
443 drawtext(stext, dc.norm);
444 if((dc.w = dc.x - x) > bh) {
445 dc.x = x;
446 if(sel) {
447 drawtext(sel->name, dc.sel);
448 drawsquare(sel->ismax, sel->isfloating, dc.sel);
449 }
450 else
451 drawtext(NULL, dc.norm);
452 }
453 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
454 XSync(dpy, False);
455}
456
457static void
458initstyle(void) {
459 dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
460 dc.norm[ColBG] = initcolor(NORMBGCOLOR);
461 dc.norm[ColFG] = initcolor(NORMFGCOLOR);
462 dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
463 dc.sel[ColBG] = initcolor(SELBGCOLOR);
464 dc.sel[ColFG] = initcolor(SELFGCOLOR);
465 initfont(FONT);
466 dc.h = bh = dc.font.height + 2;
467}
468
469static void
470initbar(void) {
471 XSetWindowAttributes wa;
472
473 wa.override_redirect = 1;
474 wa.background_pixmap = ParentRelative;
475 wa.event_mask = ButtonPressMask | ExposureMask;
476 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
477 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
478 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
479 XDefineCursor(dpy, barwin, cursor[CurNormal]);
480 updatebarpos();
481 XMapRaised(dpy, barwin);
482 strcpy(stext, "dwm-"VERSION);
483 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
484 dc.gc = XCreateGC(dpy, root, 0, 0);
485 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
486 if(!dc.font.set)
487 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
488}
489
490static unsigned int
491textw(const char *text) {
492 return textnw(text, strlen(text)) + dc.font.height;
493}
494
495static void
496togglebar(const char *arg) {
497 if(bpos == BarOff)
498 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
499 else
500 bpos = BarOff;
501 updatebarpos();
502 arrange();
503}
504
505static void
506updatebarpos(void) {
507 XEvent ev;
508
509 wax = sx;
510 way = sy;
511 wah = sh;
512 waw = sw;
513 switch(bpos) {
514 default:
515 wah -= bh;
516 way += bh;
517 XMoveWindow(dpy, barwin, sx, sy);
518 break;
519 case BarBot:
520 wah -= bh;
521 XMoveWindow(dpy, barwin, sx, sy + wah);
522 break;
523 case BarOff:
524 XMoveWindow(dpy, barwin, sx, sy - bh);
525 break;
526 }
527 XSync(dpy, False);
528 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
529}
530
531static void
532attachstack(Client *c) {
533 c->snext = stack;
534 stack = c;
535}
536
537static void
538detachstack(Client *c) {
539 Client **tc;
540
541 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
542 *tc = c->snext;
543}
544
545static void
546grabbuttons(Client *c, Bool focused) {
547 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
548
549 if(focused) {
550 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
551 GrabModeAsync, GrabModeSync, None, None);
552 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
553 GrabModeAsync, GrabModeSync, None, None);
554 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
555 GrabModeAsync, GrabModeSync, None, None);
556 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
557 GrabModeAsync, GrabModeSync, None, None);
558
559 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
560 GrabModeAsync, GrabModeSync, None, None);
561 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
562 GrabModeAsync, GrabModeSync, None, None);
563 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
564 GrabModeAsync, GrabModeSync, None, None);
565 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
566 GrabModeAsync, GrabModeSync, None, None);
567
568 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
569 GrabModeAsync, GrabModeSync, None, None);
570 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
571 GrabModeAsync, GrabModeSync, None, None);
572 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
573 GrabModeAsync, GrabModeSync, None, None);
574 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
575 GrabModeAsync, GrabModeSync, None, None);
576 }
577 else
578 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
579 GrabModeAsync, GrabModeSync, None, None);
580}
581
582static Bool
583isprotodel(Client *c) {
584 int i, n;
585 Atom *protocols;
586 Bool ret = False;
587
588 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
589 for(i = 0; !ret && i < n; i++)
590 if(protocols[i] == wmatom[WMDelete])
591 ret = True;
592 XFree(protocols);
593 }
594 return ret;
595}
596
597static void
598setclientstate(Client *c, long state) {
599 long data[] = {state, None};
600
601 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
602 PropModeReplace, (unsigned char *)data, 2);
603}
604
605static int
606xerrordummy(Display *dsply, XErrorEvent *ee) {
607 return 0;
608}
609
610static void
611ban(Client *c) {
612 if(c->isbanned)
613 return;
614 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
615 c->isbanned = True;
616}
617
618static void
619configure(Client *c) {
620 XConfigureEvent ce;
621
622 ce.type = ConfigureNotify;
623 ce.display = dpy;
624 ce.event = c->win;
625 ce.window = c->win;
626 ce.x = c->x;
627 ce.y = c->y;
628 ce.width = c->w;
629 ce.height = c->h;
630 ce.border_width = c->border;
631 ce.above = None;
632 ce.override_redirect = False;
633 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
634}
635
636static void
637killclient(const char *arg) {
638 XEvent ev;
639
640 if(!sel)
641 return;
642 if(isprotodel(sel)) {
643 ev.type = ClientMessage;
644 ev.xclient.window = sel->win;
645 ev.xclient.message_type = wmatom[WMProtocols];
646 ev.xclient.format = 32;
647 ev.xclient.data.l[0] = wmatom[WMDelete];
648 ev.xclient.data.l[1] = CurrentTime;
649 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
650 }
651 else
652 XKillClient(dpy, sel->win);
653}
654
655static void
656manage(Window w, XWindowAttributes *wa) {
657 unsigned int i;
658 Client *c, *t = NULL;
659 Window trans;
660 Status rettrans;
661 XWindowChanges wc;
662
663 c = emallocz(sizeof(Client));
664 c->tags = emallocz(ntags * sizeof(Bool));
665 c->win = w;
666 c->x = wa->x;
667 c->y = wa->y;
668 c->w = wa->width;
669 c->h = wa->height;
670 c->oldborder = wa->border_width;
671 if(c->w == sw && c->h == sh) {
672 c->x = sx;
673 c->y = sy;
674 c->border = wa->border_width;
675 }
676 else {
677 if(c->x + c->w + 2 * c->border > wax + waw)
678 c->x = wax + waw - c->w - 2 * c->border;
679 if(c->y + c->h + 2 * c->border > way + wah)
680 c->y = way + wah - c->h - 2 * c->border;
681 if(c->x < wax)
682 c->x = wax;
683 if(c->y < way)
684 c->y = way;
685 c->border = BORDERPX;
686 }
687 wc.border_width = c->border;
688 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
689 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
690 configure(c); /* propagates border_width, if size doesn't change */
691 updatesizehints(c);
692 XSelectInput(dpy, w,
693 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
694 grabbuttons(c, False);
695 updatetitle(c);
696 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
697 for(t = clients; t && t->win != trans; t = t->next);
698 if(t)
699 for(i = 0; i < ntags; i++)
700 c->tags[i] = t->tags[i];
701 applyrules(c);
702 if(!c->isfloating)
703 c->isfloating = (rettrans == Success) || c->isfixed;
704 attach(c);
705 attachstack(c);
706 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
707 ban(c);
708 XMapWindow(dpy, c->win);
709 setclientstate(c, NormalState);
710 arrange();
711}
712
713static void
714resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
715 double dx, dy, max, min, ratio;
716 XWindowChanges wc;
717
718 if(sizehints) {
719 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
720 dx = (double)(w - c->basew);
721 dy = (double)(h - c->baseh);
722 min = (double)(c->minax) / (double)(c->minay);
723 max = (double)(c->maxax) / (double)(c->maxay);
724 ratio = dx / dy;
725 if(max > 0 && min > 0 && ratio > 0) {
726 if(ratio < min) {
727 dy = (dx * min + dy) / (min * min + 1);
728 dx = dy * min;
729 w = (int)dx + c->basew;
730 h = (int)dy + c->baseh;
731 }
732 else if(ratio > max) {
733 dy = (dx * min + dy) / (max * max + 1);
734 dx = dy * min;
735 w = (int)dx + c->basew;
736 h = (int)dy + c->baseh;
737 }
738 }
739 }
740 if(c->minw && w < c->minw)
741 w = c->minw;
742 if(c->minh && h < c->minh)
743 h = c->minh;
744 if(c->maxw && w > c->maxw)
745 w = c->maxw;
746 if(c->maxh && h > c->maxh)
747 h = c->maxh;
748 if(c->incw)
749 w -= (w - c->basew) % c->incw;
750 if(c->inch)
751 h -= (h - c->baseh) % c->inch;
752 }
753 if(w <= 0 || h <= 0)
754 return;
755 /* offscreen appearance fixes */
756 if(x > sw)
757 x = sw - w - 2 * c->border;
758 if(y > sh)
759 y = sh - h - 2 * c->border;
760 if(x + w + 2 * c->border < sx)
761 x = sx;
762 if(y + h + 2 * c->border < sy)
763 y = sy;
764 if(c->x != x || c->y != y || c->w != w || c->h != h) {
765 c->x = wc.x = x;
766 c->y = wc.y = y;
767 c->w = wc.width = w;
768 c->h = wc.height = h;
769 wc.border_width = c->border;
770 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
771 configure(c);
772 XSync(dpy, False);
773 }
774}
775
776static void
777unban(Client *c) {
778 if(!c->isbanned)
779 return;
780 XMoveWindow(dpy, c->win, c->x, c->y);
781 c->isbanned = False;
782}
783
784static void
785unmanage(Client *c) {
786 XWindowChanges wc;
787
788 wc.border_width = c->oldborder;
789 /* The server grab construct avoids race conditions. */
790 XGrabServer(dpy);
791 XSetErrorHandler(xerrordummy);
792 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
793 detach(c);
794 detachstack(c);
795 if(sel == c)
796 focus(NULL);
797 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
798 setclientstate(c, WithdrawnState);
799 free(c->tags);
800 free(c);
801 XSync(dpy, False);
802 XSetErrorHandler(xerror);
803 XUngrabServer(dpy);
804 arrange();
805}
806
807static void
808updatesizehints(Client *c) {
809 long msize;
810 XSizeHints size;
811
812 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
813 size.flags = PSize;
814 c->flags = size.flags;
815 if(c->flags & PBaseSize) {
816 c->basew = size.base_width;
817 c->baseh = size.base_height;
818 }
819 else if(c->flags & PMinSize) {
820 c->basew = size.min_width;
821 c->baseh = size.min_height;
822 }
823 else
824 c->basew = c->baseh = 0;
825 if(c->flags & PResizeInc) {
826 c->incw = size.width_inc;
827 c->inch = size.height_inc;
828 }
829 else
830 c->incw = c->inch = 0;
831 if(c->flags & PMaxSize) {
832 c->maxw = size.max_width;
833 c->maxh = size.max_height;
834 }
835 else
836 c->maxw = c->maxh = 0;
837 if(c->flags & PMinSize) {
838 c->minw = size.min_width;
839 c->minh = size.min_height;
840 }
841 else if(c->flags & PBaseSize) {
842 c->minw = size.base_width;
843 c->minh = size.base_height;
844 }
845 else
846 c->minw = c->minh = 0;
847 if(c->flags & PAspect) {
848 c->minax = size.min_aspect.x;
849 c->maxax = size.max_aspect.x;
850 c->minay = size.min_aspect.y;
851 c->maxay = size.max_aspect.y;
852 }
853 else
854 c->minax = c->maxax = c->minay = c->maxay = 0;
855 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
856 && c->maxw == c->minw && c->maxh == c->minh);
857}
858
859static void
860updatetitle(Client *c) {
861 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
862 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
863}
864
865static Client *
866getclient(Window w) {
867 Client *c;
868
869 for(c = clients; c && c->win != w; c = c->next);
870 return c;
871}
872
873static void
874movemouse(Client *c) {
875 int x1, y1, ocx, ocy, di, nx, ny;
876 unsigned int dui;
877 Window dummy;
878 XEvent ev;
879
880 ocx = nx = c->x;
881 ocy = ny = c->y;
882 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
883 None, cursor[CurMove], CurrentTime) != GrabSuccess)
884 return;
885 c->ismax = False;
886 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
887 for(;;) {
888 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
889 switch (ev.type) {
890 case ButtonRelease:
891 XUngrabPointer(dpy, CurrentTime);
892 return;
893 case ConfigureRequest:
894 case Expose:
895 case MapRequest:
896 handler[ev.type](&ev);
897 break;
898 case MotionNotify:
899 XSync(dpy, False);
900 nx = ocx + (ev.xmotion.x - x1);
901 ny = ocy + (ev.xmotion.y - y1);
902 if(abs(wax + nx) < SNAP)
903 nx = wax;
904 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
905 nx = wax + waw - c->w - 2 * c->border;
906 if(abs(way - ny) < SNAP)
907 ny = way;
908 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
909 ny = way + wah - c->h - 2 * c->border;
910 resize(c, nx, ny, c->w, c->h, False);
911 break;
912 }
913 }
914}
915
916static void
917resizemouse(Client *c) {
918 int ocx, ocy;
919 int nw, nh;
920 XEvent ev;
921
922 ocx = c->x;
923 ocy = c->y;
924 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
925 None, cursor[CurResize], CurrentTime) != GrabSuccess)
926 return;
927 c->ismax = False;
928 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
929 for(;;) {
930 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
931 switch(ev.type) {
932 case ButtonRelease:
933 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
934 c->w + c->border - 1, c->h + c->border - 1);
935 XUngrabPointer(dpy, CurrentTime);
936 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
937 return;
938 case ConfigureRequest:
939 case Expose:
940 case MapRequest:
941 handler[ev.type](&ev);
942 break;
943 case MotionNotify:
944 XSync(dpy, False);
945 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
946 nw = 1;
947 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
948 nh = 1;
949 resize(c, c->x, c->y, nw, nh, True);
950 break;
951 }
952 }
953}
954
955static void
956buttonpress(XEvent *e) {
957 unsigned int i, x;
958 Client *c;
959 XButtonPressedEvent *ev = &e->xbutton;
960
961 if(barwin == ev->window) {
962 x = 0;
963 for(i = 0; i < ntags; i++) {
964 x += textw(tags[i]);
965 if(ev->x < x) {
966 if(ev->button == Button1) {
967 if(ev->state & MODKEY)
968 tag(tags[i]);
969 else
970 view(tags[i]);
971 }
972 else if(ev->button == Button3) {
973 if(ev->state & MODKEY)
974 toggletag(tags[i]);
975 else
976 toggleview(tags[i]);
977 }
978 return;
979 }
980 }
981 if((ev->x < x + blw) && ev->button == Button1)
982 setlayout(NULL);
983 }
984 else if((c = getclient(ev->window))) {
985 focus(c);
986 if(CLEANMASK(ev->state) != MODKEY)
987 return;
988 if(ev->button == Button1 && (isfloating() || c->isfloating)) {
989 restack();
990 movemouse(c);
991 }
992 else if(ev->button == Button2)
993 zoom(NULL);
994 else if(ev->button == Button3
995 && (isfloating() || c->isfloating) && !c->isfixed)
996 {
997 restack();
998 resizemouse(c);
999 }
1000 }
1001}
1002
1003static void
1004configurerequest(XEvent *e) {
1005 Client *c;
1006 XConfigureRequestEvent *ev = &e->xconfigurerequest;
1007 XWindowChanges wc;
1008
1009 if((c = getclient(ev->window))) {
1010 c->ismax = False;
1011 if(ev->value_mask & CWBorderWidth)
1012 c->border = ev->border_width;
1013 if(c->isfixed || c->isfloating || isfloating()) {
1014 if(ev->value_mask & CWX)
1015 c->x = ev->x;
1016 if(ev->value_mask & CWY)
1017 c->y = ev->y;
1018 if(ev->value_mask & CWWidth)
1019 c->w = ev->width;
1020 if(ev->value_mask & CWHeight)
1021 c->h = ev->height;
1022 if((c->x + c->w) > sw && c->isfloating)
1023 c->x = sw / 2 - c->w / 2; /* center in x direction */
1024 if((c->y + c->h) > sh && c->isfloating)
1025 c->y = sh / 2 - c->h / 2; /* center in y direction */
1026 if((ev->value_mask & (CWX | CWY))
1027 && !(ev->value_mask & (CWWidth | CWHeight)))
1028 configure(c);
1029 if(isvisible(c))
1030 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
1031 }
1032 else
1033 configure(c);
1034 }
1035 else {
1036 wc.x = ev->x;
1037 wc.y = ev->y;
1038 wc.width = ev->width;
1039 wc.height = ev->height;
1040 wc.border_width = ev->border_width;
1041 wc.sibling = ev->above;
1042 wc.stack_mode = ev->detail;
1043 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
1044 }
1045 XSync(dpy, False);
1046}
1047
1048static void
1049configurenotify(XEvent *e) {
1050 XConfigureEvent *ev = &e->xconfigure;
1051
1052 if (ev->window == root && (ev->width != sw || ev->height != sh)) {
1053 sw = ev->width;
1054 sh = ev->height;
1055 XFreePixmap(dpy, dc.drawable);
1056 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1057 XResizeWindow(dpy, barwin, sw, bh);
1058 updatebarpos();
1059 arrange();
1060 }
1061}
1062
1063static void
1064destroynotify(XEvent *e) {
1065 Client *c;
1066 XDestroyWindowEvent *ev = &e->xdestroywindow;
1067
1068 if((c = getclient(ev->window)))
1069 unmanage(c);
1070}
1071
1072static void
1073enternotify(XEvent *e) {
1074 Client *c;
1075 XCrossingEvent *ev = &e->xcrossing;
1076
1077 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
1078 return;
1079 if((c = getclient(ev->window)))
1080 focus(c);
1081 else if(ev->window == root) {
1082 selscreen = True;
1083 focus(NULL);
1084 }
1085}
1086
1087static void
1088expose(XEvent *e) {
1089 XExposeEvent *ev = &e->xexpose;
1090
1091 if(ev->count == 0) {
1092 if(barwin == ev->window)
1093 drawbar();
1094 }
1095}
1096
1097static void
1098keypress(XEvent *e) {
1099 KEYS
1100 unsigned int len = sizeof keys / sizeof keys[0];
1101 unsigned int i;
1102 KeyCode code;
1103 KeySym keysym;
1104 XKeyEvent *ev;
1105
1106 if(!e) { /* grabkeys */
1107 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1108 for(i = 0; i < len; i++) {
1109 code = XKeysymToKeycode(dpy, keys[i].keysym);
1110 XGrabKey(dpy, code, keys[i].mod, root, True,
1111 GrabModeAsync, GrabModeAsync);
1112 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
1113 GrabModeAsync, GrabModeAsync);
1114 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
1115 GrabModeAsync, GrabModeAsync);
1116 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
1117 GrabModeAsync, GrabModeAsync);
1118 }
1119 return;
1120 }
1121 ev = &e->xkey;
1122 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1123 for(i = 0; i < len; i++)
1124 if(keysym == keys[i].keysym
1125 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1126 {
1127 if(keys[i].func)
1128 keys[i].func(keys[i].arg);
1129 }
1130}
1131
1132static void
1133leavenotify(XEvent *e) {
1134 XCrossingEvent *ev = &e->xcrossing;
1135
1136 if((ev->window == root) && !ev->same_screen) {
1137 selscreen = False;
1138 focus(NULL);
1139 }
1140}
1141
1142static void
1143mappingnotify(XEvent *e) {
1144 XMappingEvent *ev = &e->xmapping;
1145
1146 XRefreshKeyboardMapping(ev);
1147 if(ev->request == MappingKeyboard)
1148 keypress(NULL);
1149}
1150
1151static void
1152maprequest(XEvent *e) {
1153 static XWindowAttributes wa;
1154 XMapRequestEvent *ev = &e->xmaprequest;
1155
1156 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1157 return;
1158 if(wa.override_redirect)
1159 return;
1160 if(!getclient(ev->window))
1161 manage(ev->window, &wa);
1162}
1163
1164static void
1165propertynotify(XEvent *e) {
1166 Client *c;
1167 Window trans;
1168 XPropertyEvent *ev = &e->xproperty;
1169
1170 if(ev->state == PropertyDelete)
1171 return; /* ignore */
1172 if((c = getclient(ev->window))) {
1173 switch (ev->atom) {
1174 default: break;
1175 case XA_WM_TRANSIENT_FOR:
1176 XGetTransientForHint(dpy, c->win, &trans);
1177 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1178 arrange();
1179 break;
1180 case XA_WM_NORMAL_HINTS:
1181 updatesizehints(c);
1182 break;
1183 }
1184 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1185 updatetitle(c);
1186 if(c == sel)
1187 drawbar();
1188 }
1189 }
1190}
1191
1192static void
1193unmapnotify(XEvent *e) {
1194 Client *c;
1195 XUnmapEvent *ev = &e->xunmap;
1196
1197 if((c = getclient(ev->window)))
1198 unmanage(c);
1199}
1200
1201static unsigned int
1202idxoftag(const char *tag) {
1203 unsigned int i;
1204
1205 for(i = 0; i < ntags; i++)
1206 if(tags[i] == tag)
1207 return i;
1208 return 0;
1209}
1210
1211static void
1212floating(void) { /* default floating layout */
1213 Client *c;
1214
1215 for(c = clients; c; c = c->next)
1216 if(isvisible(c))
1217 resize(c, c->x, c->y, c->w, c->h, True);
1218}
1219
1220static void
1221applyrules(Client *c) {
1222 static char buf[512];
1223 unsigned int i, j;
1224 regmatch_t tmp;
1225 Bool matched = False;
1226 XClassHint ch = { 0 };
1227
1228 /* rule matching */
1229 XGetClassHint(dpy, c->win, &ch);
1230 snprintf(buf, sizeof buf, "%s:%s:%s",
1231 ch.res_class ? ch.res_class : "",
1232 ch.res_name ? ch.res_name : "", c->name);
1233 for(i = 0; i < nrules; i++)
1234 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
1235 c->isfloating = rules[i].isfloating;
1236 for(j = 0; regs[i].tagregex && j < ntags; j++) {
1237 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
1238 matched = True;
1239 c->tags[j] = True;
1240 }
1241 }
1242 }
1243 if(ch.res_class)
1244 XFree(ch.res_class);
1245 if(ch.res_name)
1246 XFree(ch.res_name);
1247 if(!matched)
1248 for(i = 0; i < ntags; i++)
1249 c->tags[i] = seltags[i];
1250}
1251
1252static void
1253compileregs(void) {
1254 unsigned int i;
1255 regex_t *reg;
1256
1257 if(regs)
1258 return;
1259 nrules = sizeof rules / sizeof rules[0];
1260 regs = emallocz(nrules * sizeof(Regs));
1261 for(i = 0; i < nrules; i++) {
1262 if(rules[i].prop) {
1263 reg = emallocz(sizeof(regex_t));
1264 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
1265 free(reg);
1266 else
1267 regs[i].propregex = reg;
1268 }
1269 if(rules[i].tags) {
1270 reg = emallocz(sizeof(regex_t));
1271 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
1272 free(reg);
1273 else
1274 regs[i].tagregex = reg;
1275 }
1276 }
1277}
1278
1279static void
1280focusnext(const char *arg) {
1281 Client *c;
1282
1283 if(!sel)
1284 return;
1285 for(c = sel->next; c && !isvisible(c); c = c->next);
1286 if(!c)
1287 for(c = clients; c && !isvisible(c); c = c->next);
1288 if(c) {
1289 focus(c);
1290 restack();
1291 }
1292}
1293
1294static void
1295focusprev(const char *arg) {
1296 Client *c;
1297
1298 if(!sel)
1299 return;
1300 for(c = sel->prev; c && !isvisible(c); c = c->prev);
1301 if(!c) {
1302 for(c = clients; c && c->next; c = c->next);
1303 for(; c && !isvisible(c); c = c->prev);
1304 }
1305 if(c) {
1306 focus(c);
1307 restack();
1308 }
1309}
1310
1311static void
1312initlayouts(void) {
1313 unsigned int i, w;
1314
1315 nlayouts = sizeof layouts / sizeof layouts[0];
1316 for(blw = i = 0; i < nlayouts; i++) {
1317 w = textw(layouts[i].symbol);
1318 if(w > blw)
1319 blw = w;
1320 }
1321}
1322
1323static Bool
1324isfloating(void) {
1325 return layouts[ltidx].arrange == floating;
1326}
1327
1328static Bool
1329isvisible(Client *c) {
1330 unsigned int i;
1331
1332 for(i = 0; i < ntags; i++)
1333 if(c->tags[i] && seltags[i])
1334 return True;
1335 return False;
1336}
1337
1338static void
1339restack(void) {
1340 Client *c;
1341 XEvent ev;
1342 XWindowChanges wc;
1343
1344 drawbar();
1345 if(!sel)
1346 return;
1347 if(sel->isfloating || isfloating())
1348 XRaiseWindow(dpy, sel->win);
1349 if(!isfloating()) {
1350 wc.stack_mode = Below;
1351 wc.sibling = barwin;
1352 if(!sel->isfloating) {
1353 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1354 wc.sibling = sel->win;
1355 }
1356 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1357 if(c == sel)
1358 continue;
1359 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1360 wc.sibling = c->win;
1361 }
1362 }
1363 XSync(dpy, False);
1364 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1365}
1366
1367static void
1368setlayout(const char *arg) {
1369 unsigned int i;
1370
1371 if(!arg) {
1372 if(++ltidx == nlayouts)
1373 ltidx = 0;;
1374 }
1375 else {
1376 for(i = 0; i < nlayouts; i++)
1377 if(!strcmp(arg, layouts[i].symbol))
1378 break;
1379 if(i == nlayouts)
1380 return;
1381 ltidx = i;
1382 }
1383 if(sel)
1384 arrange();
1385 else
1386 drawbar();
1387}
1388
1389static void
1390tag(const char *arg) {
1391 unsigned int i;
1392
1393 if(!sel)
1394 return;
1395 for(i = 0; i < ntags; i++)
1396 sel->tags[i] = arg == NULL;
1397 i = idxoftag(arg);
1398 if(i >= 0 && i < ntags)
1399 sel->tags[i] = True;
1400 arrange();
1401}
1402
1403static void
1404togglefloating(const char *arg) {
1405 if(!sel)
1406 return;
1407 sel->isfloating = !sel->isfloating;
1408 if(sel->isfloating)
1409 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1410 arrange();
1411}
1412
1413static void
1414togglemax(const char *arg) {
1415 XEvent ev;
1416
1417 if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
1418 return;
1419 if((sel->ismax = !sel->ismax)) {
1420 sel->rx = sel->x;
1421 sel->ry = sel->y;
1422 sel->rw = sel->w;
1423 sel->rh = sel->h;
1424 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1425 }
1426 else
1427 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1428 drawbar();
1429 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1430}
1431
1432static void
1433toggletag(const char *arg) {
1434 unsigned int i, j;
1435
1436 if(!sel)
1437 return;
1438 i = idxoftag(arg);
1439 sel->tags[i] = !sel->tags[i];
1440 for(j = 0; j < ntags && !sel->tags[j]; j++);
1441 if(j == ntags)
1442 sel->tags[i] = True;
1443 arrange();
1444}
1445
1446static void
1447toggleview(const char *arg) {
1448 unsigned int i, j;
1449
1450 i = idxoftag(arg);
1451 seltags[i] = !seltags[i];
1452 for(j = 0; j < ntags && !seltags[j]; j++);
1453 if(j == ntags)
1454 seltags[i] = True; /* cannot toggle last view */
1455 arrange();
1456}
1457
1458static void
1459view(const char *arg) {
1460 unsigned int i;
1461
1462 for(i = 0; i < ntags; i++)
1463 seltags[i] = arg == NULL;
1464 i = idxoftag(arg);
1465 if(i >= 0 && i < ntags)
1466 seltags[i] = True;
1467 arrange();
1468}
1469
1470static void
1471cleanup(void) {
1472 close(STDIN_FILENO);
1473 while(stack) {
1474 unban(stack);
1475 unmanage(stack);
1476 }
1477 if(dc.font.set)
1478 XFreeFontSet(dpy, dc.font.set);
1479 else
1480 XFreeFont(dpy, dc.font.xfont);
1481 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1482 XFreePixmap(dpy, dc.drawable);
1483 XFreeGC(dpy, dc.gc);
1484 XDestroyWindow(dpy, barwin);
1485 XFreeCursor(dpy, cursor[CurNormal]);
1486 XFreeCursor(dpy, cursor[CurResize]);
1487 XFreeCursor(dpy, cursor[CurMove]);
1488 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
1489 XSync(dpy, False);
1490 free(seltags);
1491}
1492
1493static long
1494getstate(Window w) {
1495 int format, status;
1496 long result = -1;
1497 unsigned char *p = NULL;
1498 unsigned long n, extra;
1499 Atom real;
1500
1501 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
1502 &real, &format, &n, &extra, (unsigned char **)&p);
1503 if(status != Success)
1504 return -1;
1505 if(n != 0)
1506 result = *p;
1507 XFree(p);
1508 return result;
1509}
1510
1511static void
1512scan(void) {
1513 unsigned int i, num;
1514 Window *wins, d1, d2;
1515 XWindowAttributes wa;
1516
1517 wins = NULL;
1518 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1519 for(i = 0; i < num; i++) {
1520 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1521 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1522 continue;
1523 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1524 manage(wins[i], &wa);
1525 }
1526 for(i = 0; i < num; i++) { /* now the transients */
1527 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1528 continue;
1529 if(XGetTransientForHint(dpy, wins[i], &d1)
1530 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1531 manage(wins[i], &wa);
1532 }
1533 }
1534 if(wins)
1535 XFree(wins);
1536}
1537
1538static void
1539setup(void) {
1540 int i, j;
1541 unsigned int mask;
1542 Window w;
1543 XModifierKeymap *modmap;
1544 XSetWindowAttributes wa;
1545
1546 /* init atoms */
1547 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1548 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1549 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1550 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1551 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1552 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1553 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1554 PropModeReplace, (unsigned char *) netatom, NetLast);
1555 /* init cursors */
1556 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1557 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1558 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1559 /* init modifier map */
1560 modmap = XGetModifierMapping(dpy);
1561 for (i = 0; i < 8; i++)
1562 for (j = 0; j < modmap->max_keypermod; j++) {
1563 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1564 == XKeysymToKeycode(dpy, XK_Num_Lock))
1565 numlockmask = (1 << i);
1566 }
1567 XFreeModifiermap(modmap);
1568 /* select for events */
1569 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1570 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1571 wa.cursor = cursor[CurNormal];
1572 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1573 XSelectInput(dpy, root, wa.event_mask);
1574 keypress(NULL); /* grabkeys */
1575 compileregs();
1576 for(ntags = 0; tags[ntags]; ntags++);
1577 seltags = emallocz(sizeof(Bool) * ntags);
1578 seltags[0] = True;
1579 /* geometry */
1580 sx = sy = 0;
1581 sw = DisplayWidth(dpy, screen);
1582 sh = DisplayHeight(dpy, screen);
1583 initstyle();
1584 initlayouts();
1585 initbar();
1586 /* multihead support */
1587 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
1588}
1589
1590/*
1591 * Startup Error handler to check if another window manager
1592 * is already running.
1593 */
1594static int
1595xerrorstart(Display *dsply, XErrorEvent *ee) {
1596 otherwm = True;
1597 return -1;
1598}
1599
1600static Bool
1601gettextprop(Window w, Atom atom, char *text, unsigned int size) {
1602 char **list = NULL;
1603 int n;
1604 XTextProperty name;
1605
1606 if(!text || size == 0)
1607 return False;
1608 text[0] = '\0';
1609 XGetTextProperty(dpy, w, &name, atom);
1610 if(!name.nitems)
1611 return False;
1612 if(name.encoding == XA_STRING)
1613 strncpy(text, (char *)name.value, size - 1);
1614 else {
1615 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
1616 && n > 0 && *list)
1617 {
1618 strncpy(text, *list, size - 1);
1619 XFreeStringList(list);
1620 }
1621 }
1622 text[size - 1] = '\0';
1623 XFree(name.value);
1624 return True;
1625}
1626
1627static void
1628quit(const char *arg) {
1629 readin = running = False;
1630}
1631
1632/* There's no way to check accesses to destroyed windows, thus those cases are
1633 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1634 * default error handler, which may call exit.
1635 */
1636static int
1637xerror(Display *dpy, XErrorEvent *ee) {
1638 if(ee->error_code == BadWindow
1639 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1640 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1641 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1642 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1643 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1644 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1645 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1646 return 0;
1647 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1648 ee->request_code, ee->error_code);
1649 return xerrorxlib(dpy, ee); /* may call exit */
1650}
1651
1652static void
1653arrange(void) {
1654 Client *c;
1655
1656 for(c = clients; c; c = c->next)
1657 if(isvisible(c))
1658 unban(c);
1659 else
1660 ban(c);
1661 layouts[ltidx].arrange();
1662 focus(NULL);
1663 restack();
1664}
1665
1666static void
1667attach(Client *c) {
1668 if(clients)
1669 clients->prev = c;
1670 c->next = clients;
1671 clients = c;
1672}
1673
1674static void
1675detach(Client *c) {
1676 if(c->prev)
1677 c->prev->next = c->next;
1678 if(c->next)
1679 c->next->prev = c->prev;
1680 if(c == clients)
1681 clients = c->next;
1682 c->next = c->prev = NULL;
1683}
1684
1685static void
1686focus(Client *c) {
1687 if((!c && selscreen) || (c && !isvisible(c)))
1688 for(c = stack; c && !isvisible(c); c = c->snext);
1689 if(sel && sel != c) {
1690 grabbuttons(sel, False);
1691 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
1692 }
1693 if(c) {
1694 detachstack(c);
1695 attachstack(c);
1696 grabbuttons(c, True);
1697 }
1698 sel = c;
1699 drawbar();
1700 if(!selscreen)
1701 return;
1702 if(c) {
1703 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
1704 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1705 }
1706 else
1707 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1708}
1709
1710static Bool
1711isarrange(void (*func)())
1712{
1713 return func == layouts[ltidx].arrange;
1714}
1715
1716static Client *
1717nexttiled(Client *c) {
1718 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1719 return c;
1720}
1721
1722static void
1723setmwfact(const char *arg) {
1724 double delta;
1725
1726 if(!isarrange(tile))
1727 return;
1728 /* arg handling, manipulate mwfact */
1729 if(arg == NULL)
1730 mwfact = MWFACT;
1731 else if(1 == sscanf(arg, "%lf", &delta)) {
1732 if(arg[0] != '+' && arg[0] != '-')
1733 mwfact = delta;
1734 else
1735 mwfact += delta;
1736 if(mwfact < 0.1)
1737 mwfact = 0.1;
1738 else if(mwfact > 0.9)
1739 mwfact = 0.9;
1740 }
1741 arrange();
1742}
1743
1744static void
1745tile(void) {
1746 unsigned int i, n, nx, ny, nw, nh, mw, th;
1747 Client *c;
1748
1749 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1750 n++;
1751
1752 /* window geoms */
1753 mw = (n == 1) ? waw : mwfact * waw;
1754 th = (n > 1) ? wah / (n - 1) : 0;
1755 if(n > 1 && th < bh)
1756 th = wah;
1757
1758 nx = wax;
1759 ny = way;
1760 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1761 c->ismax = False;
1762 if(i == 0) { /* master */
1763 nw = mw - 2 * c->border;
1764 nh = wah - 2 * c->border;
1765 }
1766 else { /* tile window */
1767 if(i == 1) {
1768 ny = way;
1769 nx += mw;
1770 }
1771 nw = waw - mw - 2 * c->border;
1772 if(i + 1 == n) /* remainder */
1773 nh = (way + wah) - ny - 2 * c->border;
1774 else
1775 nh = th - 2 * c->border;
1776 }
1777 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1778 if(n > 1 && th != wah)
1779 ny += nh + 2 * c->border;
1780 }
1781}
1782
1783static void
1784zoom(const char *arg) {
1785 Client *c;
1786
1787 if(!sel || !isarrange(tile) || sel->isfloating)
1788 return;
1789 if((c = sel) == nexttiled(clients))
1790 if(!(c = nexttiled(c->next)))
1791 return;
1792 detach(c);
1793 attach(c);
1794 focus(c);
1795 arrange();
1796}
1797
1798int
1799main(int argc, char *argv[]) {
1800 char *p;
1801 int r, xfd;
1802 fd_set rd;
1803 XEvent ev;
1804
1805 if(argc == 2 && !strcmp("-v", argv[1]))
1806 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1807 else if(argc != 1)
1808 eprint("usage: dwm [-v]\n");
1809 setlocale(LC_CTYPE, "");
1810 if(!(dpy = XOpenDisplay(0)))
1811 eprint("dwm: cannot open display\n");
1812 xfd = ConnectionNumber(dpy);
1813 screen = DefaultScreen(dpy);
1814 root = RootWindow(dpy, screen);
1815 otherwm = False;
1816 XSetErrorHandler(xerrorstart);
1817 /* this causes an error if some other window manager is running */
1818 XSelectInput(dpy, root, SubstructureRedirectMask);
1819 XSync(dpy, False);
1820 if(otherwm)
1821 eprint("dwm: another window manager is already running\n");
1822
1823 XSync(dpy, False);
1824 XSetErrorHandler(NULL);
1825 xerrorxlib = XSetErrorHandler(xerror);
1826 XSync(dpy, False);
1827 setup();
1828 drawbar();
1829 scan();
1830
1831 /* main event loop, also reads status text from stdin */
1832 XSync(dpy, False);
1833 readin = True;
1834 while(running) {
1835 FD_ZERO(&rd);
1836 if(readin)
1837 FD_SET(STDIN_FILENO, &rd);
1838 FD_SET(xfd, &rd);
1839 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1840 if(errno == EINTR)
1841 continue;
1842 eprint("select failed\n");
1843 }
1844 if(FD_ISSET(STDIN_FILENO, &rd)) {
1845 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1846 case -1:
1847 strncpy(stext, strerror(errno), sizeof stext - 1);
1848 stext[sizeof stext - 1] = '\0';
1849 readin = False;
1850 break;
1851 case 0:
1852 strncpy(stext, "EOF", 4);
1853 readin = False;
1854 break;
1855 default:
1856 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1857 for(; p >= stext && *p != '\n'; --p);
1858 if(p > stext)
1859 strncpy(stext, p + 1, sizeof stext);
1860 }
1861 drawbar();
1862 }
1863 while(XPending(dpy)) {
1864 XNextEvent(dpy, &ev);
1865 if(handler[ev.type])
1866 (handler[ev.type])(&ev); /* call handler */
1867 }
1868 }
1869 cleanup();
1870 XCloseDisplay(dpy);
1871 return 0;
1872}