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 MAXTAGLEN 16
52#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53#define WIDTH(x) ((x)->w + 2 * (x)->bw)
54#define HEIGHT(x) ((x)->h + 2 * (x)->bw)
55#define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
56#define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
57
58/* enums */
59enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
63enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 void *v;
71} Arg;
72
73typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79} Button;
80
81typedef struct Client Client;
82struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Window win;
93};
94
95typedef struct {
96 int x, y, w, h;
97 unsigned long norm[ColLast];
98 unsigned long sel[ColLast];
99 Drawable drawable;
100 GC gc;
101 struct {
102 int ascent;
103 int descent;
104 int height;
105 XFontSet set;
106 XFontStruct *xfont;
107 } font;
108} DC; /* draw context */
109
110typedef struct {
111 unsigned int mod;
112 KeySym keysym;
113 void (*func)(const Arg *);
114 const Arg arg;
115} Key;
116
117typedef struct {
118 const char *symbol;
119 void (*arrange)(void);
120} Layout;
121
122typedef struct {
123 const char *class;
124 const char *instance;
125 const char *title;
126 unsigned int tags;
127 Bool isfloating;
128} Rule;
129
130/* function declarations */
131static void applyrules(Client *c);
132static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
133static void arrange(void);
134static void attach(Client *c);
135static void attachstack(Client *c);
136static void buttonpress(XEvent *e);
137static void checkotherwm(void);
138static void cleanup(void);
139static void clearurgent(Client *c);
140static void configure(Client *c);
141static void configurenotify(XEvent *e);
142static void configurerequest(XEvent *e);
143static void destroynotify(XEvent *e);
144static void detach(Client *c);
145static void detachstack(Client *c);
146static void die(const char *errstr, ...);
147static void drawbar(void);
148static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
150static void enternotify(XEvent *e);
151static void expose(XEvent *e);
152static void focus(Client *c);
153static void focusin(XEvent *e);
154static void focusstack(const Arg *arg);
155static Client *getclient(Window w);
156static unsigned long getcolor(const char *colstr);
157static long getstate(Window w);
158static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
159static void grabbuttons(Client *c, Bool focused);
160static void grabkeys(void);
161static void initfont(const char *fontstr);
162static Bool isprotodel(Client *c);
163static void keypress(XEvent *e);
164static void killclient(const Arg *arg);
165static void manage(Window w, XWindowAttributes *wa);
166static void mappingnotify(XEvent *e);
167static void maprequest(XEvent *e);
168static void monocle(void);
169static void movemouse(const Arg *arg);
170static Client *nexttiled(Client *c);
171static void propertynotify(XEvent *e);
172static void quit(const Arg *arg);
173static void resize(Client *c, int x, int y, int w, int h);
174static void resizemouse(const Arg *arg);
175static void restack(void);
176static void run(void);
177static void scan(void);
178static void setclientstate(Client *c, long state);
179static void setlayout(const Arg *arg);
180static void setmfact(const Arg *arg);
181static void setup(void);
182static void showhide(Client *c);
183static void sigchld(int signal);
184static void spawn(const Arg *arg);
185static void tag(const Arg *arg);
186static int textnw(const char *text, unsigned int len);
187static void tile(void);
188static void togglebar(const Arg *arg);
189static void togglefloating(const Arg *arg);
190static void toggletag(const Arg *arg);
191static void toggleview(const Arg *arg);
192static void unmanage(Client *c);
193static void unmapnotify(XEvent *e);
194static void updatebar(void);
195static void updategeom(void);
196static void updatenumlockmask(void);
197static void updatesizehints(Client *c);
198static void updatestatus(void);
199static void updatetitle(Client *c);
200static void updatewmhints(Client *c);
201static void view(const Arg *arg);
202static int xerror(Display *dpy, XErrorEvent *ee);
203static int xerrordummy(Display *dpy, XErrorEvent *ee);
204static int xerrorstart(Display *dpy, XErrorEvent *ee);
205static void zoom(const Arg *arg);
206
207/* variables */
208static char stext[256];
209static int screen;
210static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
211static int by, bh, blw; /* bar geometry y, height and layout symbol width */
212static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
213static unsigned int seltags = 0, sellt = 0;
214static int (*xerrorxlib)(Display *, XErrorEvent *);
215static unsigned int numlockmask = 0;
216static void (*handler[LASTEvent]) (XEvent *) = {
217 [ButtonPress] = buttonpress,
218 [ConfigureRequest] = configurerequest,
219 [ConfigureNotify] = configurenotify,
220 [DestroyNotify] = destroynotify,
221 [EnterNotify] = enternotify,
222 [Expose] = expose,
223 [FocusIn] = focusin,
224 [KeyPress] = keypress,
225 [MappingNotify] = mappingnotify,
226 [MapRequest] = maprequest,
227 [PropertyNotify] = propertynotify,
228 [UnmapNotify] = unmapnotify
229};
230static Atom wmatom[WMLast], netatom[NetLast];
231static Bool otherwm;
232static Bool running = True;
233static Client *clients = NULL;
234static Client *sel = NULL;
235static Client *stack = NULL;
236static Cursor cursor[CurLast];
237static Display *dpy;
238static DC dc;
239static Layout *lt[] = { NULL, NULL };
240static Window root, barwin;
241/* configuration, allows nested code to access above variables */
242#include "config.h"
243
244/* compile-time check if all tags fit into an unsigned int bit array. */
245struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
246
247/* function implementations */
248void
249applyrules(Client *c) {
250 unsigned int i;
251 Rule *r;
252 XClassHint ch = { 0 };
253
254 /* rule matching */
255 c->isfloating = c->tags = 0;
256 if(XGetClassHint(dpy, c->win, &ch)) {
257 for(i = 0; i < LENGTH(rules); i++) {
258 r = &rules[i];
259 if((!r->title || strstr(c->name, r->title))
260 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
261 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
262 c->isfloating = r->isfloating;
263 c->tags |= r->tags;
264 }
265 }
266 if(ch.res_class)
267 XFree(ch.res_class);
268 if(ch.res_name)
269 XFree(ch.res_name);
270 }
271 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : tagset[seltags];
272}
273
274Bool
275applysizehints(Client *c, int *x, int *y, int *w, int *h) {
276 Bool baseismin;
277
278 /* set minimum possible */
279 *w = MAX(1, *w);
280 *h = MAX(1, *h);
281
282 if(*x > sx + sw)
283 *x = sw - WIDTH(c);
284 if(*y > sy + sh)
285 *y = sh - HEIGHT(c);
286 if(*x + *w + 2 * c->bw < sx)
287 *x = sx;
288 if(*y + *h + 2 * c->bw < sy)
289 *y = sy;
290 if(*h < bh)
291 *h = bh;
292 if(*w < bh)
293 *w = bh;
294
295 if(resizehints || c->isfloating) {
296 /* see last two sentences in ICCCM 4.1.2.3 */
297 baseismin = c->basew == c->minw && c->baseh == c->minh;
298
299 if(!baseismin) { /* temporarily remove base dimensions */
300 *w -= c->basew;
301 *h -= c->baseh;
302 }
303
304 /* adjust for aspect limits */
305 if(c->mina > 0 && c->maxa > 0) {
306 if(c->maxa < (float)*w / *h)
307 *w = *h * c->maxa;
308 else if(c->mina < (float)*h / *w)
309 *h = *w * c->mina;
310 }
311
312 if(baseismin) { /* increment calculation requires this */
313 *w -= c->basew;
314 *h -= c->baseh;
315 }
316
317 /* adjust for increment value */
318 if(c->incw)
319 *w -= *w % c->incw;
320 if(c->inch)
321 *h -= *h % c->inch;
322
323 /* restore base dimensions */
324 *w += c->basew;
325 *h += c->baseh;
326
327 *w = MAX(*w, c->minw);
328 *h = MAX(*h, c->minh);
329
330 if(c->maxw)
331 *w = MIN(*w, c->maxw);
332
333 if(c->maxh)
334 *h = MIN(*h, c->maxh);
335 }
336 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
337}
338
339void
340arrange(void) {
341 showhide(stack);
342 focus(NULL);
343 if(lt[sellt]->arrange)
344 lt[sellt]->arrange();
345 restack();
346}
347
348void
349attach(Client *c) {
350 c->next = clients;
351 clients = c;
352}
353
354void
355attachstack(Client *c) {
356 c->snext = stack;
357 stack = c;
358}
359
360void
361buttonpress(XEvent *e) {
362 unsigned int i, x, click;
363 Arg arg = {0};
364 Client *c;
365 XButtonPressedEvent *ev = &e->xbutton;
366
367 click = ClkRootWin;
368 if(ev->window == barwin) {
369 i = x = 0;
370 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
371 if(i < LENGTH(tags)) {
372 click = ClkTagBar;
373 arg.ui = 1 << i;
374 }
375 else if(ev->x < x + blw)
376 click = ClkLtSymbol;
377 else if(ev->x > wx + ww - TEXTW(stext))
378 click = ClkStatusText;
379 else
380 click = ClkWinTitle;
381 }
382 else if((c = getclient(ev->window))) {
383 focus(c);
384 click = ClkClientWin;
385 }
386
387 for(i = 0; i < LENGTH(buttons); i++)
388 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
389 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
390 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
391}
392
393void
394checkotherwm(void) {
395 otherwm = False;
396 xerrorxlib = XSetErrorHandler(xerrorstart);
397
398 /* this causes an error if some other window manager is running */
399 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
400 XSync(dpy, False);
401 if(otherwm)
402 die("dwm: another window manager is already running\n");
403 XSetErrorHandler(xerror);
404 XSync(dpy, False);
405}
406
407void
408cleanup(void) {
409 Arg a = {.ui = ~0};
410 Layout foo = { "", NULL };
411
412 view(&a);
413 lt[sellt] = &foo;
414 while(stack)
415 unmanage(stack);
416 if(dc.font.set)
417 XFreeFontSet(dpy, dc.font.set);
418 else
419 XFreeFont(dpy, dc.font.xfont);
420 XUngrabKey(dpy, AnyKey, AnyModifier, root);
421 XFreePixmap(dpy, dc.drawable);
422 XFreeGC(dpy, dc.gc);
423 XFreeCursor(dpy, cursor[CurNormal]);
424 XFreeCursor(dpy, cursor[CurResize]);
425 XFreeCursor(dpy, cursor[CurMove]);
426 XDestroyWindow(dpy, barwin);
427 XSync(dpy, False);
428 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
429}
430
431void
432clearurgent(Client *c) {
433 XWMHints *wmh;
434
435 c->isurgent = False;
436 if(!(wmh = XGetWMHints(dpy, c->win)))
437 return;
438 wmh->flags &= ~XUrgencyHint;
439 XSetWMHints(dpy, c->win, wmh);
440 XFree(wmh);
441}
442
443void
444configure(Client *c) {
445 XConfigureEvent ce;
446
447 ce.type = ConfigureNotify;
448 ce.display = dpy;
449 ce.event = c->win;
450 ce.window = c->win;
451 ce.x = c->x;
452 ce.y = c->y;
453 ce.width = c->w;
454 ce.height = c->h;
455 ce.border_width = c->bw;
456 ce.above = None;
457 ce.override_redirect = False;
458 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
459}
460
461void
462configurenotify(XEvent *e) {
463 XConfigureEvent *ev = &e->xconfigure;
464
465 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
466 sw = ev->width;
467 sh = ev->height;
468 updategeom();
469 updatebar();
470 arrange();
471 }
472}
473
474void
475configurerequest(XEvent *e) {
476 Client *c;
477 XConfigureRequestEvent *ev = &e->xconfigurerequest;
478 XWindowChanges wc;
479
480 if((c = getclient(ev->window))) {
481 if(ev->value_mask & CWBorderWidth)
482 c->bw = ev->border_width;
483 else if(c->isfloating || !lt[sellt]->arrange) {
484 if(ev->value_mask & CWX)
485 c->x = sx + ev->x;
486 if(ev->value_mask & CWY)
487 c->y = sy + ev->y;
488 if(ev->value_mask & CWWidth)
489 c->w = ev->width;
490 if(ev->value_mask & CWHeight)
491 c->h = ev->height;
492 if((c->x - sx + c->w) > sw && c->isfloating)
493 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
494 if((c->y - sy + c->h) > sh && c->isfloating)
495 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
496 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
497 configure(c);
498 if(ISVISIBLE(c))
499 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
500 }
501 else
502 configure(c);
503 }
504 else {
505 wc.x = ev->x;
506 wc.y = ev->y;
507 wc.width = ev->width;
508 wc.height = ev->height;
509 wc.border_width = ev->border_width;
510 wc.sibling = ev->above;
511 wc.stack_mode = ev->detail;
512 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
513 }
514 XSync(dpy, False);
515}
516
517void
518destroynotify(XEvent *e) {
519 Client *c;
520 XDestroyWindowEvent *ev = &e->xdestroywindow;
521
522 if((c = getclient(ev->window)))
523 unmanage(c);
524}
525
526void
527detach(Client *c) {
528 Client **tc;
529
530 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
531 *tc = c->next;
532}
533
534void
535detachstack(Client *c) {
536 Client **tc;
537
538 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
539 *tc = c->snext;
540}
541
542void
543die(const char *errstr, ...) {
544 va_list ap;
545
546 va_start(ap, errstr);
547 vfprintf(stderr, errstr, ap);
548 va_end(ap);
549 exit(EXIT_FAILURE);
550}
551
552void
553drawbar(void) {
554 int x;
555 unsigned int i, occ = 0, urg = 0;
556 unsigned long *col;
557 Client *c;
558
559 for(c = clients; c; c = c->next) {
560 occ |= c->tags;
561 if(c->isurgent)
562 urg |= c->tags;
563 }
564
565 dc.x = 0;
566 for(i = 0; i < LENGTH(tags); i++) {
567 dc.w = TEXTW(tags[i]);
568 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
569 drawtext(tags[i], col, urg & 1 << i);
570 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
571 dc.x += dc.w;
572 }
573 if(blw > 0) {
574 dc.w = blw;
575 drawtext(lt[sellt]->symbol, dc.norm, False);
576 x = dc.x + dc.w;
577 }
578 else
579 x = dc.x;
580 dc.w = TEXTW(stext);
581 dc.x = ww - dc.w;
582 if(dc.x < x) {
583 dc.x = x;
584 dc.w = ww - x;
585 }
586 drawtext(stext, dc.norm, False);
587 if((dc.w = dc.x - x) > bh) {
588 dc.x = x;
589 if(sel) {
590 drawtext(sel->name, dc.sel, False);
591 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
592 }
593 else
594 drawtext(NULL, dc.norm, False);
595 }
596 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
597 XSync(dpy, False);
598}
599
600void
601drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
602 int x;
603 XGCValues gcv;
604 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
605
606 gcv.foreground = col[invert ? ColBG : ColFG];
607 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
608 x = (dc.font.ascent + dc.font.descent + 2) / 4;
609 r.x = dc.x + 1;
610 r.y = dc.y + 1;
611 if(filled) {
612 r.width = r.height = x + 1;
613 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
614 }
615 else if(empty) {
616 r.width = r.height = x;
617 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
618 }
619}
620
621void
622drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
623 char buf[256];
624 int i, x, y, h, len, olen;
625 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
626
627 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
628 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
629 if(!text)
630 return;
631 olen = strlen(text);
632 h = dc.font.ascent + dc.font.descent;
633 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
634 x = dc.x + (h / 2);
635 /* shorten text if necessary */
636 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
637 if(!len)
638 return;
639 memcpy(buf, text, len);
640 if(len < olen)
641 for(i = len; i && i > len - 3; buf[--i] = '.');
642 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
643 if(dc.font.set)
644 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
645 else
646 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
647}
648
649void
650enternotify(XEvent *e) {
651 Client *c;
652 XCrossingEvent *ev = &e->xcrossing;
653
654 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
655 return;
656 if((c = getclient(ev->window)))
657 focus(c);
658 else
659 focus(NULL);
660}
661
662void
663expose(XEvent *e) {
664 XExposeEvent *ev = &e->xexpose;
665
666 if(ev->count == 0 && (ev->window == barwin))
667 drawbar();
668}
669
670void
671focus(Client *c) {
672 if(!c || !ISVISIBLE(c))
673 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
674 if(sel && sel != c) {
675 grabbuttons(sel, False);
676 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
677 }
678 if(c) {
679 if(c->isurgent)
680 clearurgent(c);
681 detachstack(c);
682 attachstack(c);
683 grabbuttons(c, True);
684 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
685 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
686 }
687 else
688 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
689 sel = c;
690 drawbar();
691}
692
693void
694focusin(XEvent *e) { /* there are some broken focus acquiring clients */
695 XFocusChangeEvent *ev = &e->xfocus;
696
697 if(sel && ev->window != sel->win)
698 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
699}
700
701void
702focusstack(const Arg *arg) {
703 Client *c = NULL, *i;
704
705 if(!sel)
706 return;
707 if (arg->i > 0) {
708 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
709 if(!c)
710 for(c = clients; c && !ISVISIBLE(c); c = c->next);
711 }
712 else {
713 for(i = clients; i != sel; i = i->next)
714 if(ISVISIBLE(i))
715 c = i;
716 if(!c)
717 for(; i; i = i->next)
718 if(ISVISIBLE(i))
719 c = i;
720 }
721 if(c) {
722 focus(c);
723 restack();
724 }
725}
726
727Client *
728getclient(Window w) {
729 Client *c;
730
731 for(c = clients; c && c->win != w; c = c->next);
732 return c;
733}
734
735unsigned long
736getcolor(const char *colstr) {
737 Colormap cmap = DefaultColormap(dpy, screen);
738 XColor color;
739
740 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
741 die("error, cannot allocate color '%s'\n", colstr);
742 return color.pixel;
743}
744
745long
746getstate(Window w) {
747 int format, status;
748 long result = -1;
749 unsigned char *p = NULL;
750 unsigned long n, extra;
751 Atom real;
752
753 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
754 &real, &format, &n, &extra, (unsigned char **)&p);
755 if(status != Success)
756 return -1;
757 if(n != 0)
758 result = *p;
759 XFree(p);
760 return result;
761}
762
763Bool
764gettextprop(Window w, Atom atom, char *text, unsigned int size) {
765 char **list = NULL;
766 int n;
767 XTextProperty name;
768
769 if(!text || size == 0)
770 return False;
771 text[0] = '\0';
772 XGetTextProperty(dpy, w, &name, atom);
773 if(!name.nitems)
774 return False;
775 if(name.encoding == XA_STRING)
776 strncpy(text, (char *)name.value, size - 1);
777 else {
778 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
779 && n > 0 && *list) {
780 strncpy(text, *list, size - 1);
781 XFreeStringList(list);
782 }
783 }
784 text[size - 1] = '\0';
785 XFree(name.value);
786 return True;
787}
788
789void
790grabbuttons(Client *c, Bool focused) {
791 updatenumlockmask();
792 {
793 unsigned int i, j;
794 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
795 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
796 if(focused) {
797 for(i = 0; i < LENGTH(buttons); i++)
798 if(buttons[i].click == ClkClientWin)
799 for(j = 0; j < LENGTH(modifiers); j++)
800 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
801 } else
802 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
803 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
804 }
805}
806
807void
808grabkeys(void) {
809 updatenumlockmask();
810 { /* grab keys */
811 unsigned int i, j;
812 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
813 KeyCode code;
814
815 XUngrabKey(dpy, AnyKey, AnyModifier, root);
816 for(i = 0; i < LENGTH(keys); i++) {
817 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
818 for(j = 0; j < LENGTH(modifiers); j++)
819 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
820 True, GrabModeAsync, GrabModeAsync);
821 }
822 }
823}
824
825void
826initfont(const char *fontstr) {
827 char *def, **missing;
828 int i, n;
829
830 missing = NULL;
831 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
832 if(missing) {
833 while(n--)
834 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
835 XFreeStringList(missing);
836 }
837 if(dc.font.set) {
838 XFontSetExtents *font_extents;
839 XFontStruct **xfonts;
840 char **font_names;
841 dc.font.ascent = dc.font.descent = 0;
842 font_extents = XExtentsOfFontSet(dc.font.set);
843 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
844 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
845 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
846 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
847 xfonts++;
848 }
849 }
850 else {
851 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
852 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
853 die("error, cannot load font: '%s'\n", fontstr);
854 dc.font.ascent = dc.font.xfont->ascent;
855 dc.font.descent = dc.font.xfont->descent;
856 }
857 dc.font.height = dc.font.ascent + dc.font.descent;
858}
859
860Bool
861isprotodel(Client *c) {
862 int i, n;
863 Atom *protocols;
864 Bool ret = False;
865
866 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
867 for(i = 0; !ret && i < n; i++)
868 if(protocols[i] == wmatom[WMDelete])
869 ret = True;
870 XFree(protocols);
871 }
872 return ret;
873}
874
875void
876keypress(XEvent *e) {
877 unsigned int i;
878 KeySym keysym;
879 XKeyEvent *ev;
880
881 ev = &e->xkey;
882 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
883 for(i = 0; i < LENGTH(keys); i++)
884 if(keysym == keys[i].keysym
885 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
886 && keys[i].func)
887 keys[i].func(&(keys[i].arg));
888}
889
890void
891killclient(const Arg *arg) {
892 XEvent ev;
893
894 if(!sel)
895 return;
896 if(isprotodel(sel)) {
897 ev.type = ClientMessage;
898 ev.xclient.window = sel->win;
899 ev.xclient.message_type = wmatom[WMProtocols];
900 ev.xclient.format = 32;
901 ev.xclient.data.l[0] = wmatom[WMDelete];
902 ev.xclient.data.l[1] = CurrentTime;
903 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
904 }
905 else
906 XKillClient(dpy, sel->win);
907}
908
909void
910manage(Window w, XWindowAttributes *wa) {
911 static Client cz;
912 Client *c, *t = NULL;
913 Window trans = None;
914 XWindowChanges wc;
915
916 if(!(c = malloc(sizeof(Client))))
917 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
918 *c = cz;
919 c->win = w;
920
921 /* geometry */
922 c->x = wa->x;
923 c->y = wa->y;
924 c->w = wa->width;
925 c->h = wa->height;
926 c->oldbw = wa->border_width;
927 if(c->w == sw && c->h == sh) {
928 c->x = sx;
929 c->y = sy;
930 c->bw = 0;
931 }
932 else {
933 if(c->x + WIDTH(c) > sx + sw)
934 c->x = sx + sw - WIDTH(c);
935 if(c->y + HEIGHT(c) > sy + sh)
936 c->y = sy + sh - HEIGHT(c);
937 c->x = MAX(c->x, sx);
938 /* only fix client y-offset, if the client center might cover the bar */
939 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
940 c->bw = borderpx;
941 }
942
943 wc.border_width = c->bw;
944 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
945 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
946 configure(c); /* propagates border_width, if size doesn't change */
947 updatesizehints(c);
948 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
949 grabbuttons(c, False);
950 updatetitle(c);
951 if(XGetTransientForHint(dpy, w, &trans))
952 t = getclient(trans);
953 if(t)
954 c->tags = t->tags;
955 else
956 applyrules(c);
957 if(!c->isfloating)
958 c->isfloating = trans != None || c->isfixed;
959 if(c->isfloating)
960 XRaiseWindow(dpy, c->win);
961 attach(c);
962 attachstack(c);
963 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
964 XMapWindow(dpy, c->win);
965 setclientstate(c, NormalState);
966 arrange();
967}
968
969void
970mappingnotify(XEvent *e) {
971 XMappingEvent *ev = &e->xmapping;
972
973 XRefreshKeyboardMapping(ev);
974 if(ev->request == MappingKeyboard)
975 grabkeys();
976}
977
978void
979maprequest(XEvent *e) {
980 static XWindowAttributes wa;
981 XMapRequestEvent *ev = &e->xmaprequest;
982
983 if(!XGetWindowAttributes(dpy, ev->window, &wa))
984 return;
985 if(wa.override_redirect)
986 return;
987 if(!getclient(ev->window))
988 manage(ev->window, &wa);
989}
990
991void
992monocle(void) {
993 Client *c;
994
995 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
996 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw);
997 }
998}
999
1000void
1001movemouse(const Arg *arg) {
1002 int x, y, ocx, ocy, di, nx, ny;
1003 unsigned int dui;
1004 Client *c;
1005 Window dummy;
1006 XEvent ev;
1007
1008 if(!(c = sel))
1009 return;
1010 restack();
1011 ocx = c->x;
1012 ocy = c->y;
1013 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1014 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1015 return;
1016 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
1017 do {
1018 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1019 switch (ev.type) {
1020 case ConfigureRequest:
1021 case Expose:
1022 case MapRequest:
1023 handler[ev.type](&ev);
1024 break;
1025 case MotionNotify:
1026 nx = ocx + (ev.xmotion.x - x);
1027 ny = ocy + (ev.xmotion.y - y);
1028 if(snap && nx >= wx && nx <= wx + ww
1029 && ny >= wy && ny <= wy + wh) {
1030 if(abs(wx - nx) < snap)
1031 nx = wx;
1032 else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
1033 nx = wx + ww - WIDTH(c);
1034 if(abs(wy - ny) < snap)
1035 ny = wy;
1036 else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
1037 ny = wy + wh - HEIGHT(c);
1038 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1039 togglefloating(NULL);
1040 }
1041 if(!lt[sellt]->arrange || c->isfloating)
1042 resize(c, nx, ny, c->w, c->h);
1043 break;
1044 }
1045 }
1046 while(ev.type != ButtonRelease);
1047 XUngrabPointer(dpy, CurrentTime);
1048}
1049
1050Client *
1051nexttiled(Client *c) {
1052 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1053 return c;
1054}
1055
1056void
1057propertynotify(XEvent *e) {
1058 Client *c;
1059 Window trans;
1060 XPropertyEvent *ev = &e->xproperty;
1061
1062 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1063 updatestatus();
1064 else if(ev->state == PropertyDelete)
1065 return; /* ignore */
1066 else if((c = getclient(ev->window))) {
1067 switch (ev->atom) {
1068 default: break;
1069 case XA_WM_TRANSIENT_FOR:
1070 XGetTransientForHint(dpy, c->win, &trans);
1071 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1072 arrange();
1073 break;
1074 case XA_WM_NORMAL_HINTS:
1075 updatesizehints(c);
1076 break;
1077 case XA_WM_HINTS:
1078 updatewmhints(c);
1079 drawbar();
1080 break;
1081 }
1082 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1083 updatetitle(c);
1084 if(c == sel)
1085 drawbar();
1086 }
1087 }
1088}
1089
1090void
1091quit(const Arg *arg) {
1092 running = False;
1093}
1094
1095void
1096resize(Client *c, int x, int y, int w, int h) {
1097 XWindowChanges wc;
1098
1099 if(applysizehints(c, &x, &y, &w, &h)) {
1100 c->x = wc.x = x;
1101 c->y = wc.y = y;
1102 c->w = wc.width = w;
1103 c->h = wc.height = h;
1104 wc.border_width = c->bw;
1105 XConfigureWindow(dpy, c->win,
1106 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1107 configure(c);
1108 XSync(dpy, False);
1109 }
1110}
1111
1112void
1113resizemouse(const Arg *arg) {
1114 int ocx, ocy;
1115 int nw, nh;
1116 Client *c;
1117 XEvent ev;
1118
1119 if(!(c = sel))
1120 return;
1121 restack();
1122 ocx = c->x;
1123 ocy = c->y;
1124 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1125 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1126 return;
1127 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1128 do {
1129 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1130 switch(ev.type) {
1131 case ConfigureRequest:
1132 case Expose:
1133 case MapRequest:
1134 handler[ev.type](&ev);
1135 break;
1136 case MotionNotify:
1137 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1138 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1139
1140 if(snap && nw >= wx && nw <= wx + ww
1141 && nh >= wy && nh <= wy + wh) {
1142 if(!c->isfloating && lt[sellt]->arrange
1143 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1144 togglefloating(NULL);
1145 }
1146 if(!lt[sellt]->arrange || c->isfloating)
1147 resize(c, c->x, c->y, nw, nh);
1148 break;
1149 }
1150 }
1151 while(ev.type != ButtonRelease);
1152 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1153 XUngrabPointer(dpy, CurrentTime);
1154 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1155}
1156
1157void
1158restack(void) {
1159 Client *c;
1160 XEvent ev;
1161 XWindowChanges wc;
1162
1163 drawbar();
1164 if(!sel)
1165 return;
1166 if(sel->isfloating || !lt[sellt]->arrange)
1167 XRaiseWindow(dpy, sel->win);
1168 if(lt[sellt]->arrange) {
1169 wc.stack_mode = Below;
1170 wc.sibling = barwin;
1171 for(c = stack; c; c = c->snext)
1172 if(!c->isfloating && ISVISIBLE(c)) {
1173 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1174 wc.sibling = c->win;
1175 }
1176 }
1177 XSync(dpy, False);
1178 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1179}
1180
1181void
1182run(void) {
1183 XEvent ev;
1184
1185 /* main event loop */
1186 XSync(dpy, False);
1187 while(running && !XNextEvent(dpy, &ev)) {
1188 if(handler[ev.type])
1189 (handler[ev.type])(&ev); /* call handler */
1190 }
1191}
1192
1193void
1194scan(void) {
1195 unsigned int i, num;
1196 Window d1, d2, *wins = NULL;
1197 XWindowAttributes wa;
1198
1199 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1200 for(i = 0; i < num; i++) {
1201 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1202 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1203 continue;
1204 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1205 manage(wins[i], &wa);
1206 }
1207 for(i = 0; i < num; i++) { /* now the transients */
1208 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1209 continue;
1210 if(XGetTransientForHint(dpy, wins[i], &d1)
1211 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1212 manage(wins[i], &wa);
1213 }
1214 if(wins)
1215 XFree(wins);
1216 }
1217}
1218
1219void
1220setclientstate(Client *c, long state) {
1221 long data[] = {state, None};
1222
1223 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1224 PropModeReplace, (unsigned char *)data, 2);
1225}
1226
1227void
1228setlayout(const Arg *arg) {
1229 if(!arg || !arg->v || arg->v != lt[sellt])
1230 sellt ^= 1;
1231 if(arg && arg->v)
1232 lt[sellt] = (Layout *)arg->v;
1233 if(sel)
1234 arrange();
1235 else
1236 drawbar();
1237}
1238
1239/* arg > 1.0 will set mfact absolutly */
1240void
1241setmfact(const Arg *arg) {
1242 float f;
1243
1244 if(!arg || !lt[sellt]->arrange)
1245 return;
1246 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1247 if(f < 0.1 || f > 0.9)
1248 return;
1249 mfact = f;
1250 arrange();
1251}
1252
1253void
1254setup(void) {
1255 unsigned int i;
1256 int w;
1257 XSetWindowAttributes wa;
1258
1259 /* init screen */
1260 screen = DefaultScreen(dpy);
1261 root = RootWindow(dpy, screen);
1262 initfont(font);
1263 sx = 0;
1264 sy = 0;
1265 sw = DisplayWidth(dpy, screen);
1266 sh = DisplayHeight(dpy, screen);
1267 bh = dc.h = dc.font.height + 2;
1268 lt[0] = &layouts[0];
1269 lt[1] = &layouts[1 % LENGTH(layouts)];
1270 updategeom();
1271
1272 /* init atoms */
1273 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1274 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1275 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1276 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1277 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1278
1279 /* init cursors */
1280 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1281 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1282 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1283
1284 /* init appearance */
1285 dc.norm[ColBorder] = getcolor(normbordercolor);
1286 dc.norm[ColBG] = getcolor(normbgcolor);
1287 dc.norm[ColFG] = getcolor(normfgcolor);
1288 dc.sel[ColBorder] = getcolor(selbordercolor);
1289 dc.sel[ColBG] = getcolor(selbgcolor);
1290 dc.sel[ColFG] = getcolor(selfgcolor);
1291 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1292 dc.gc = XCreateGC(dpy, root, 0, NULL);
1293 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1294 if(!dc.font.set)
1295 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1296
1297 /* init bar */
1298 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1299 w = TEXTW(layouts[i].symbol);
1300 blw = MAX(blw, w);
1301 }
1302
1303 wa.override_redirect = True;
1304 wa.background_pixmap = ParentRelative;
1305 wa.event_mask = ButtonPressMask|ExposureMask;
1306
1307 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1308 CopyFromParent, DefaultVisual(dpy, screen),
1309 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1310 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1311 XMapRaised(dpy, barwin);
1312 updatestatus();
1313
1314 /* EWMH support per view */
1315 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1316 PropModeReplace, (unsigned char *) netatom, NetLast);
1317
1318 /* select for events */
1319 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1320 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1321 |PropertyChangeMask;
1322 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1323 XSelectInput(dpy, root, wa.event_mask);
1324
1325 grabkeys();
1326}
1327
1328void
1329showhide(Client *c) {
1330 if(!c)
1331 return;
1332 if(ISVISIBLE(c)) { /* show clients top down */
1333 XMoveWindow(dpy, c->win, c->x, c->y);
1334 if(!lt[sellt]->arrange || c->isfloating)
1335 resize(c, c->x, c->y, c->w, c->h);
1336 showhide(c->snext);
1337 }
1338 else { /* hide clients bottom up */
1339 showhide(c->snext);
1340 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1341 }
1342}
1343
1344
1345void
1346sigchld(int signal) {
1347 while(0 < waitpid(-1, NULL, WNOHANG));
1348}
1349
1350void
1351spawn(const Arg *arg) {
1352 signal(SIGCHLD, sigchld);
1353 if(fork() == 0) {
1354 if(dpy)
1355 close(ConnectionNumber(dpy));
1356 setsid();
1357 execvp(((char **)arg->v)[0], (char **)arg->v);
1358 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1359 perror(" failed");
1360 exit(0);
1361 }
1362}
1363
1364void
1365tag(const Arg *arg) {
1366 if(sel && arg->ui & TAGMASK) {
1367 sel->tags = arg->ui & TAGMASK;
1368 arrange();
1369 }
1370}
1371
1372int
1373textnw(const char *text, unsigned int len) {
1374 XRectangle r;
1375
1376 if(dc.font.set) {
1377 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1378 return r.width;
1379 }
1380 return XTextWidth(dc.font.xfont, text, len);
1381}
1382
1383void
1384tile(void) {
1385 int x, y, h, w, mw;
1386 unsigned int i, n;
1387 Client *c;
1388
1389 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1390 if(n == 0)
1391 return;
1392
1393 /* master */
1394 c = nexttiled(clients);
1395 mw = mfact * ww;
1396 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw);
1397
1398 if(--n == 0)
1399 return;
1400
1401 /* tile stack */
1402 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1403 y = wy;
1404 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1405 h = wh / n;
1406 if(h < bh)
1407 h = wh;
1408
1409 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1410 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1411 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw));
1412 if(h != wh)
1413 y = c->y + HEIGHT(c);
1414 }
1415}
1416
1417void
1418togglebar(const Arg *arg) {
1419 showbar = !showbar;
1420 updategeom();
1421 updatebar();
1422 arrange();
1423}
1424
1425void
1426togglefloating(const Arg *arg) {
1427 if(!sel)
1428 return;
1429 sel->isfloating = !sel->isfloating || sel->isfixed;
1430 if(sel->isfloating)
1431 resize(sel, sel->x, sel->y, sel->w, sel->h);
1432 arrange();
1433}
1434
1435void
1436toggletag(const Arg *arg) {
1437 unsigned int mask;
1438
1439 if (!sel)
1440 return;
1441
1442 mask = sel->tags ^ (arg->ui & TAGMASK);
1443 if(mask) {
1444 sel->tags = mask;
1445 arrange();
1446 }
1447}
1448
1449void
1450toggleview(const Arg *arg) {
1451 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1452
1453 if(mask) {
1454 tagset[seltags] = mask;
1455 arrange();
1456 }
1457}
1458
1459void
1460unmanage(Client *c) {
1461 XWindowChanges wc;
1462
1463 wc.border_width = c->oldbw;
1464 /* The server grab construct avoids race conditions. */
1465 XGrabServer(dpy);
1466 XSetErrorHandler(xerrordummy);
1467 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1468 detach(c);
1469 detachstack(c);
1470 if(sel == c)
1471 focus(NULL);
1472 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1473 setclientstate(c, WithdrawnState);
1474 free(c);
1475 XSync(dpy, False);
1476 XSetErrorHandler(xerror);
1477 XUngrabServer(dpy);
1478 arrange();
1479}
1480
1481void
1482unmapnotify(XEvent *e) {
1483 Client *c;
1484 XUnmapEvent *ev = &e->xunmap;
1485
1486 if((c = getclient(ev->window)))
1487 unmanage(c);
1488}
1489
1490void
1491updatebar(void) {
1492 if(dc.drawable != 0)
1493 XFreePixmap(dpy, dc.drawable);
1494 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1495 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1496}
1497
1498void
1499updategeom(void) {
1500#ifdef XINERAMA
1501 int n, i = 0;
1502 XineramaScreenInfo *info = NULL;
1503
1504 /* window area geometry */
1505 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1506 if(n > 1) {
1507 int di, x, y;
1508 unsigned int dui;
1509 Window dummy;
1510 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1511 for(i = 0; i < n; i++)
1512 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1513 break;
1514 }
1515 wx = info[i].x_org;
1516 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1517 ww = info[i].width;
1518 wh = showbar ? info[i].height - bh : info[i].height;
1519 XFree(info);
1520 }
1521 else
1522#endif
1523 {
1524 wx = sx;
1525 wy = showbar && topbar ? sy + bh : sy;
1526 ww = sw;
1527 wh = showbar ? sh - bh : sh;
1528 }
1529
1530 /* bar position */
1531 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1532}
1533
1534void
1535updatenumlockmask(void) {
1536 unsigned int i, j;
1537 XModifierKeymap *modmap;
1538
1539 numlockmask = 0;
1540 modmap = XGetModifierMapping(dpy);
1541 for(i = 0; i < 8; i++)
1542 for(j = 0; j < modmap->max_keypermod; j++)
1543 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
1544 numlockmask = (1 << i);
1545 XFreeModifiermap(modmap);
1546}
1547
1548void
1549updatesizehints(Client *c) {
1550 long msize;
1551 XSizeHints size;
1552
1553 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1554 /* size is uninitialized, ensure that size.flags aren't used */
1555 size.flags = PSize;
1556 if(size.flags & PBaseSize) {
1557 c->basew = size.base_width;
1558 c->baseh = size.base_height;
1559 }
1560 else if(size.flags & PMinSize) {
1561 c->basew = size.min_width;
1562 c->baseh = size.min_height;
1563 }
1564 else
1565 c->basew = c->baseh = 0;
1566 if(size.flags & PResizeInc) {
1567 c->incw = size.width_inc;
1568 c->inch = size.height_inc;
1569 }
1570 else
1571 c->incw = c->inch = 0;
1572 if(size.flags & PMaxSize) {
1573 c->maxw = size.max_width;
1574 c->maxh = size.max_height;
1575 }
1576 else
1577 c->maxw = c->maxh = 0;
1578 if(size.flags & PMinSize) {
1579 c->minw = size.min_width;
1580 c->minh = size.min_height;
1581 }
1582 else if(size.flags & PBaseSize) {
1583 c->minw = size.base_width;
1584 c->minh = size.base_height;
1585 }
1586 else
1587 c->minw = c->minh = 0;
1588 if(size.flags & PAspect) {
1589 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1590 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1591 }
1592 else
1593 c->maxa = c->mina = 0.0;
1594 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1595 && c->maxw == c->minw && c->maxh == c->minh);
1596}
1597
1598void
1599updatetitle(Client *c) {
1600 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1601 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1602}
1603
1604void
1605updatestatus() {
1606 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1607 strcpy(stext, "dwm-"VERSION);
1608 drawbar();
1609}
1610
1611void
1612updatewmhints(Client *c) {
1613 XWMHints *wmh;
1614
1615 if((wmh = XGetWMHints(dpy, c->win))) {
1616 if(c == sel && wmh->flags & XUrgencyHint) {
1617 wmh->flags &= ~XUrgencyHint;
1618 XSetWMHints(dpy, c->win, wmh);
1619 }
1620 else
1621 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1622
1623 XFree(wmh);
1624 }
1625}
1626
1627void
1628view(const Arg *arg) {
1629 if((arg->ui & TAGMASK) == tagset[seltags])
1630 return;
1631 seltags ^= 1; /* toggle sel tagset */
1632 if(arg->ui & TAGMASK)
1633 tagset[seltags] = arg->ui & TAGMASK;
1634 arrange();
1635}
1636
1637/* There's no way to check accesses to destroyed windows, thus those cases are
1638 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1639 * default error handler, which may call exit. */
1640int
1641xerror(Display *dpy, XErrorEvent *ee) {
1642 if(ee->error_code == BadWindow
1643 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1644 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1645 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1646 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1647 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1648 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1649 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1650 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1651 return 0;
1652 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1653 ee->request_code, ee->error_code);
1654 return xerrorxlib(dpy, ee); /* may call exit */
1655}
1656
1657int
1658xerrordummy(Display *dpy, XErrorEvent *ee) {
1659 return 0;
1660}
1661
1662/* Startup Error handler to check if another window manager
1663 * is already running. */
1664int
1665xerrorstart(Display *dpy, XErrorEvent *ee) {
1666 otherwm = True;
1667 return -1;
1668}
1669
1670void
1671zoom(const Arg *arg) {
1672 Client *c = sel;
1673
1674 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1675 return;
1676 if(c == nexttiled(clients))
1677 if(!c || !(c = nexttiled(c->next)))
1678 return;
1679 detach(c);
1680 attach(c);
1681 focus(c);
1682 arrange();
1683}
1684
1685int
1686main(int argc, char *argv[]) {
1687 if(argc == 2 && !strcmp("-v", argv[1]))
1688 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1689 else if(argc != 1)
1690 die("usage: dwm [-v]\n");
1691
1692 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1693 fputs("warning: no locale support\n", stderr);
1694
1695 if(!(dpy = XOpenDisplay(NULL)))
1696 die("dwm: cannot open display\n");
1697
1698 checkotherwm();
1699 setup();
1700 scan();
1701 run();
1702 cleanup();
1703
1704 XCloseDisplay(dpy);
1705 return 0;
1706}