dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23#include <errno.h>
24#include <locale.h>
25#include <stdarg.h>
26#include <signal.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <unistd.h>
31#include <sys/types.h>
32#include <sys/wait.h>
33#include <X11/cursorfont.h>
34#include <X11/keysym.h>
35#include <X11/Xatom.h>
36#include <X11/Xlib.h>
37#include <X11/Xproto.h>
38#include <X11/Xutil.h>
39#ifdef XINERAMA
40#include <X11/extensions/Xinerama.h>
41#endif /* XINERAMA */
42
43/* macros */
44#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47#define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48#define LENGTH(X) (sizeof X / sizeof X[0])
49#define MAX(A, B) ((A) > (B) ? (A) : (B))
50#define MIN(A, B) ((A) < (B) ? (A) : (B))
51#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52#define WIDTH(X) ((X)->w + 2 * (X)->bw)
53#define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54#define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55#define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57/* enums */
58enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 const void *v;
70} Arg;
71
72typedef struct {
73 unsigned int click;
74 unsigned int mask;
75 unsigned int button;
76 void (*func)(const Arg *arg);
77 const Arg arg;
78} Button;
79
80typedef struct Monitor Monitor;
81typedef struct Client Client;
82struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Monitor *mon;
93 Window win;
94};
95
96typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109} DC; /* draw context */
110
111typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116} Key;
117
118typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121} Layout;
122
123struct Monitor {
124 float mfact;
125 int num;
126 int by; /* bar geometry */
127 int mx, my, mw, mh; /* screen size */
128 int wx, wy, ww, wh; /* window area */
129 unsigned int seltags;
130 unsigned int sellt;
131 unsigned int tagset[2];
132 Bool showbar;
133 Bool topbar;
134 Client *clients;
135 Client *sel;
136 Client *stack;
137 Monitor *next;
138 Window barwin;
139 const Layout *lt[2];
140};
141
142typedef struct {
143 const char *class;
144 const char *instance;
145 const char *title;
146 unsigned int tags;
147 Bool isfloating;
148 int monitor;
149} Rule;
150
151/* function declarations */
152static void applyrules(Client *c);
153static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
154static void arrange(void);
155static void attach(Client *c);
156static void attachstack(Client *c);
157static void buttonpress(XEvent *e);
158static void checkotherwm(void);
159static void cleanup(void);
160static void cleanupmons(void);
161static void clearurgent(Client *c);
162static void configure(Client *c);
163static void configurenotify(XEvent *e);
164static void configurerequest(XEvent *e);
165static void destroynotify(XEvent *e);
166static void detach(Client *c);
167static void detachstack(Client *c);
168static void die(const char *errstr, ...);
169static Monitor *dirtomon(int dir);
170static void drawbar(Monitor *m);
171static void drawbars(void);
172static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
173static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
174static void enternotify(XEvent *e);
175static void expose(XEvent *e);
176static void focus(Client *c);
177static void focusin(XEvent *e);
178static void focusmon(const Arg *arg);
179static void focusstack(const Arg *arg);
180static unsigned long getcolor(const char *colstr);
181static Bool getrootptr(int *x, int *y);
182static long getstate(Window w);
183static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
184static void grabbuttons(Client *c, Bool focused);
185static void grabkeys(void);
186static void initfont(const char *fontstr);
187static Bool isprotodel(Client *c);
188static void keypress(XEvent *e);
189static void killclient(const Arg *arg);
190static void manage(Window w, XWindowAttributes *wa);
191static void mappingnotify(XEvent *e);
192static void maprequest(XEvent *e);
193static void monocle(Monitor *m);
194static void movemouse(const Arg *arg);
195static Client *nexttiled(Client *c);
196static Monitor *ptrtomon(int x, int y);
197static void propertynotify(XEvent *e);
198static void quit(const Arg *arg);
199static void resize(Client *c, int x, int y, int w, int h, Bool interact);
200static void resizemouse(const Arg *arg);
201static void restack(Monitor *m);
202static void run(void);
203static void scan(void);
204static void sendmon(Client *c, Monitor *m);
205static void setclientstate(Client *c, long state);
206static void setlayout(const Arg *arg);
207static void setmfact(const Arg *arg);
208static void setup(void);
209static void showhide(Client *c);
210static void sigchld(int signal);
211static void spawn(const Arg *arg);
212static void tag(const Arg *arg);
213static void tagmon(const Arg *arg);
214static int textnw(const char *text, unsigned int len);
215static void tile(Monitor *);
216static void togglebar(const Arg *arg);
217static void togglefloating(const Arg *arg);
218static void toggletag(const Arg *arg);
219static void toggleview(const Arg *arg);
220static void unfocus(Client *c);
221static void unmanage(Client *c);
222static void unmapnotify(XEvent *e);
223static void updategeom(void);
224static void updatebarpos(Monitor *m);
225static void updatebars(void);
226static void updatenumlockmask(void);
227static void updatesizehints(Client *c);
228static void updatestatus(void);
229static void updatetitle(Client *c);
230static void updatewmhints(Client *c);
231static void view(const Arg *arg);
232static Client *wintoclient(Window w);
233static Monitor *wintomon(Window w);
234static int xerror(Display *dpy, XErrorEvent *ee);
235static int xerrordummy(Display *dpy, XErrorEvent *ee);
236static int xerrorstart(Display *dpy, XErrorEvent *ee);
237static void zoom(const Arg *arg);
238
239/* variables */
240static char stext[256], ntext[8];
241static int screen;
242static int sw, sh; /* X display screen geometry width, height */
243static int bh, blw = 0; /* bar geometry */
244static int (*xerrorxlib)(Display *, XErrorEvent *);
245static unsigned int numlockmask = 0;
246static void (*handler[LASTEvent]) (XEvent *) = {
247 [ButtonPress] = buttonpress,
248 [ConfigureRequest] = configurerequest,
249 [ConfigureNotify] = configurenotify,
250 [DestroyNotify] = destroynotify,
251 [EnterNotify] = enternotify,
252 [Expose] = expose,
253 [FocusIn] = focusin,
254 [KeyPress] = keypress,
255 [MappingNotify] = mappingnotify,
256 [MapRequest] = maprequest,
257 [PropertyNotify] = propertynotify,
258 [UnmapNotify] = unmapnotify
259};
260static Atom wmatom[WMLast], netatom[NetLast];
261static Bool otherwm;
262static Bool running = True;
263static Cursor cursor[CurLast];
264static Display *dpy;
265static DC dc;
266static Monitor *mons = NULL, *selmon = NULL;
267static Window root;
268
269/* configuration, allows nested code to access above variables */
270#include "config.h"
271
272/* compile-time check if all tags fit into an unsigned int bit array. */
273struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
274
275/* function implementations */
276void
277applyrules(Client *c) {
278 unsigned int i;
279 const Rule *r;
280 Monitor *m;
281 XClassHint ch = { 0 };
282
283 /* rule matching */
284 c->isfloating = c->tags = 0;
285 if(XGetClassHint(dpy, c->win, &ch)) {
286 for(i = 0; i < LENGTH(rules); i++) {
287 r = &rules[i];
288 if((!r->title || strstr(c->name, r->title))
289 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
290 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance))))
291 {
292 c->isfloating = r->isfloating;
293 c->tags |= r->tags;
294 for(m = mons; m && m->num != r->monitor; m = m->next);
295 if(m)
296 c->mon = m;
297 }
298 }
299 if(ch.res_class)
300 XFree(ch.res_class);
301 if(ch.res_name)
302 XFree(ch.res_name);
303 }
304 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
305}
306
307Bool
308applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
309 Bool baseismin;
310 Monitor *m = c->mon;
311
312 /* set minimum possible */
313 *w = MAX(1, *w);
314 *h = MAX(1, *h);
315 if(interact) {
316 if(*x > sw)
317 *x = sw - WIDTH(c);
318 if(*y > sh)
319 *y = sh - HEIGHT(c);
320 if(*x + *w + 2 * c->bw < 0)
321 *x = 0;
322 if(*y + *h + 2 * c->bw < 0)
323 *y = 0;
324 }
325 else {
326 if(*x > m->mx + m->mw)
327 *x = m->mx + m->mw - WIDTH(c);
328 if(*y > m->my + m->mh)
329 *y = m->my + m->mh - HEIGHT(c);
330 if(*x + *w + 2 * c->bw < m->mx)
331 *x = m->mx;
332 if(*y + *h + 2 * c->bw < m->my)
333 *y = m->my;
334 }
335 if(*h < bh)
336 *h = bh;
337 if(*w < bh)
338 *w = bh;
339 if(resizehints || c->isfloating) {
340 /* see last two sentences in ICCCM 4.1.2.3 */
341 baseismin = c->basew == c->minw && c->baseh == c->minh;
342 if(!baseismin) { /* temporarily remove base dimensions */
343 *w -= c->basew;
344 *h -= c->baseh;
345 }
346 /* adjust for aspect limits */
347 if(c->mina > 0 && c->maxa > 0) {
348 if(c->maxa < (float)*w / *h)
349 *w = *h * c->maxa;
350 else if(c->mina < (float)*h / *w)
351 *h = *w * c->mina;
352 }
353 if(baseismin) { /* increment calculation requires this */
354 *w -= c->basew;
355 *h -= c->baseh;
356 }
357 /* adjust for increment value */
358 if(c->incw)
359 *w -= *w % c->incw;
360 if(c->inch)
361 *h -= *h % c->inch;
362 /* restore base dimensions */
363 *w += c->basew;
364 *h += c->baseh;
365 *w = MAX(*w, c->minw);
366 *h = MAX(*h, c->minh);
367 if(c->maxw)
368 *w = MIN(*w, c->maxw);
369 if(c->maxh)
370 *h = MIN(*h, c->maxh);
371 }
372 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
373}
374
375void
376arrange(void) {
377 Monitor *m;
378
379 /* optimise two loops into one, check focus(NULL) */
380 for(m = mons; m; m = m->next)
381 showhide(m->stack);
382 focus(NULL);
383 for(m = mons; m; m = m->next) {
384 if(m->lt[m->sellt]->arrange)
385 m->lt[m->sellt]->arrange(m);
386 restack(m);
387 }
388}
389
390void
391attach(Client *c) {
392 c->next = c->mon->clients;
393 c->mon->clients = c;
394}
395
396void
397attachstack(Client *c) {
398 c->snext = c->mon->stack;
399 c->mon->stack = c;
400}
401
402void
403buttonpress(XEvent *e) {
404 unsigned int i, x, click;
405 Arg arg = {0};
406 Client *c;
407 Monitor *m;
408 XButtonPressedEvent *ev = &e->xbutton;
409
410 click = ClkRootWin;
411 /* focus monitor if necessary */
412 if((m = wintomon(ev->window)) && m != selmon) {
413 unfocus(selmon->sel);
414 selmon = m;
415 focus(NULL);
416 }
417 if(ev->window == selmon->barwin) {
418 i = x = 0;
419 do
420 x += TEXTW(tags[i]);
421 while(ev->x >= x && ++i < LENGTH(tags));
422 if(i < LENGTH(tags)) {
423 click = ClkTagBar;
424 arg.ui = 1 << i;
425 }
426 else if(ev->x < x + blw)
427 click = ClkLtSymbol;
428 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
429 click = ClkStatusText;
430 else
431 click = ClkWinTitle;
432 }
433 else if((c = wintoclient(ev->window))) {
434 focus(c);
435 click = ClkClientWin;
436 }
437 for(i = 0; i < LENGTH(buttons); i++)
438 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
439 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
440 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
441}
442
443void
444checkotherwm(void) {
445 otherwm = False;
446 xerrorxlib = XSetErrorHandler(xerrorstart);
447 /* this causes an error if some other window manager is running */
448 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
449 XSync(dpy, False);
450 if(otherwm)
451 die("dwm: another window manager is already running\n");
452 XSetErrorHandler(xerror);
453 XSync(dpy, False);
454}
455
456void
457cleanup(void) {
458 Arg a = {.ui = ~0};
459 Layout foo = { "", NULL };
460 Monitor *m;
461
462 view(&a);
463 selmon->lt[selmon->sellt] = &foo;
464 for(m = mons; m; m = m->next)
465 while(m->stack)
466 unmanage(m->stack);
467 if(dc.font.set)
468 XFreeFontSet(dpy, dc.font.set);
469 else
470 XFreeFont(dpy, dc.font.xfont);
471 XUngrabKey(dpy, AnyKey, AnyModifier, root);
472 XFreePixmap(dpy, dc.drawable);
473 XFreeGC(dpy, dc.gc);
474 XFreeCursor(dpy, cursor[CurNormal]);
475 XFreeCursor(dpy, cursor[CurResize]);
476 XFreeCursor(dpy, cursor[CurMove]);
477 cleanupmons();
478 XSync(dpy, False);
479 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
480}
481
482void
483cleanupmons(void) {
484 Monitor *m;
485
486 while(mons) {
487 m = mons->next;
488 XUnmapWindow(dpy, mons->barwin);
489 XDestroyWindow(dpy, mons->barwin);
490 free(mons);
491 mons = m;
492 }
493}
494
495void
496clearurgent(Client *c) {
497 XWMHints *wmh;
498
499 c->isurgent = False;
500 if(!(wmh = XGetWMHints(dpy, c->win)))
501 return;
502 wmh->flags &= ~XUrgencyHint;
503 XSetWMHints(dpy, c->win, wmh);
504 XFree(wmh);
505}
506
507void
508configure(Client *c) {
509 XConfigureEvent ce;
510
511 ce.type = ConfigureNotify;
512 ce.display = dpy;
513 ce.event = c->win;
514 ce.window = c->win;
515 ce.x = c->x;
516 ce.y = c->y;
517 ce.width = c->w;
518 ce.height = c->h;
519 ce.border_width = c->bw;
520 ce.above = None;
521 ce.override_redirect = False;
522 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
523}
524
525void
526configurenotify(XEvent *e) {
527 Monitor *m;
528 XConfigureEvent *ev = &e->xconfigure;
529
530 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
531 sw = ev->width;
532 sh = ev->height;
533 updategeom();
534 if(dc.drawable != 0)
535 XFreePixmap(dpy, dc.drawable);
536 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
537 updatebars();
538 for(m = mons; m; m = m->next)
539 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
540 arrange();
541 }
542}
543
544void
545configurerequest(XEvent *e) {
546 Client *c;
547 Monitor *m;
548 XConfigureRequestEvent *ev = &e->xconfigurerequest;
549 XWindowChanges wc;
550
551 if((c = wintoclient(ev->window))) {
552 if(ev->value_mask & CWBorderWidth)
553 c->bw = ev->border_width;
554 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
555 m = c->mon;
556 if(ev->value_mask & CWX)
557 c->x = m->mx + ev->x;
558 if(ev->value_mask & CWY)
559 c->y = m->my + ev->y;
560 if(ev->value_mask & CWWidth)
561 c->w = ev->width;
562 if(ev->value_mask & CWHeight)
563 c->h = ev->height;
564 if((c->x - m->mx + c->w) > m->mw && c->isfloating)
565 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
566 if((c->y - m->my + c->h) > m->mh && c->isfloating)
567 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
568 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
569 configure(c);
570 if(ISVISIBLE(c))
571 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
572 }
573 else
574 configure(c);
575 }
576 else {
577 wc.x = ev->x;
578 wc.y = ev->y;
579 wc.width = ev->width;
580 wc.height = ev->height;
581 wc.border_width = ev->border_width;
582 wc.sibling = ev->above;
583 wc.stack_mode = ev->detail;
584 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
585 }
586 XSync(dpy, False);
587}
588
589void
590destroynotify(XEvent *e) {
591 Client *c;
592 XDestroyWindowEvent *ev = &e->xdestroywindow;
593
594 if((c = wintoclient(ev->window)))
595 unmanage(c);
596}
597
598void
599detach(Client *c) {
600 Client **tc;
601
602 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
603 *tc = c->next;
604}
605
606void
607detachstack(Client *c) {
608 Client **tc, *t;
609
610 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
611 *tc = c->snext;
612
613 if(c == c->mon->sel) {
614 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
615 c->mon->sel = t;
616 }
617}
618
619void
620die(const char *errstr, ...) {
621 va_list ap;
622
623 va_start(ap, errstr);
624 vfprintf(stderr, errstr, ap);
625 va_end(ap);
626 exit(EXIT_FAILURE);
627}
628
629Monitor *
630dirtomon(int dir) {
631 Monitor *m = NULL;
632
633 if(dir > 0) {
634 if(!(m = selmon->next))
635 m = mons;
636 }
637 else {
638 if(selmon == mons)
639 for(m = mons; m->next; m = m->next);
640 else
641 for(m = mons; m->next != selmon; m = m->next);
642 }
643 return m;
644}
645
646void
647drawbar(Monitor *m) {
648 int x;
649 unsigned int i, n = 0, occ = 0, urg = 0;
650 unsigned long *col;
651 Client *c;
652
653 for(c = m->clients; c; c = c->next) {
654 if(ISVISIBLE(c))
655 n++;
656 occ |= c->tags;
657 if(c->isurgent)
658 urg |= c->tags;
659 }
660 dc.x = 0;
661 for(i = 0; i < LENGTH(tags); i++) {
662 dc.w = TEXTW(tags[i]);
663 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
664 drawtext(tags[i], col, urg & 1 << i);
665 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
666 occ & 1 << i, urg & 1 << i, col);
667 dc.x += dc.w;
668 }
669 if(blw > 0) {
670 dc.w = blw;
671 drawtext(m->lt[m->sellt]->symbol, dc.norm, False);
672 dc.x += dc.w;
673 }
674 snprintf(ntext, sizeof ntext, "%u", n);
675 dc.w = TEXTW(ntext);
676 drawtext(ntext, dc.norm, False);
677 x = (dc.x += dc.w);
678 if(m == selmon) { /* status is only drawn on selected monitor */
679 dc.w = TEXTW(stext);
680 dc.x = m->ww - dc.w;
681 if(dc.x < x) {
682 dc.x = x;
683 dc.w = m->ww - x;
684 }
685 drawtext(stext, dc.norm, False);
686 }
687 else
688 dc.x = m->ww;
689 if((dc.w = dc.x - x) > bh) {
690 dc.x = x;
691 if(m->sel) {
692 col = m == selmon ? dc.sel : dc.norm;
693 drawtext(m->sel->name, col, False);
694 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
695 }
696 else
697 drawtext(NULL, dc.norm, False);
698 }
699 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
700 XSync(dpy, False);
701}
702
703void
704drawbars(void) {
705 Monitor *m;
706
707 for(m = mons; m; m = m->next)
708 drawbar(m);
709}
710
711void
712drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
713 int x;
714 XGCValues gcv;
715 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
716
717 gcv.foreground = col[invert ? ColBG : ColFG];
718 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
719 x = (dc.font.ascent + dc.font.descent + 2) / 4;
720 r.x = dc.x + 1;
721 r.y = dc.y + 1;
722 if(filled) {
723 r.width = r.height = x + 1;
724 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
725 }
726 else if(empty) {
727 r.width = r.height = x;
728 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
729 }
730}
731
732void
733drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
734 char buf[256];
735 int i, x, y, h, len, olen;
736 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
737
738 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
739 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
740 if(!text)
741 return;
742 olen = strlen(text);
743 h = dc.font.ascent + dc.font.descent;
744 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
745 x = dc.x + (h / 2);
746 /* shorten text if necessary */
747 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
748 if(!len)
749 return;
750 memcpy(buf, text, len);
751 if(len < olen)
752 for(i = len; i && i > len - 3; buf[--i] = '.');
753 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
754 if(dc.font.set)
755 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
756 else
757 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
758}
759
760void
761enternotify(XEvent *e) {
762 Client *c;
763 Monitor *m;
764 XCrossingEvent *ev = &e->xcrossing;
765
766 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
767 return;
768 if((m = wintomon(ev->window)) && m != selmon) {
769 unfocus(selmon->sel);
770 selmon = m;
771 }
772 if((c = wintoclient(ev->window)))
773 focus(c);
774 else
775 focus(NULL);
776}
777
778void
779expose(XEvent *e) {
780 Monitor *m;
781 XExposeEvent *ev = &e->xexpose;
782
783 if(ev->count == 0 && (m = wintomon(ev->window)))
784 drawbar(m);
785}
786
787void
788focus(Client *c) {
789 if(!c || !ISVISIBLE(c))
790 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
791 if(selmon->sel)
792 unfocus(selmon->sel);
793 if(c) {
794 if(c->mon != selmon)
795 selmon = c->mon;
796 if(c->isurgent)
797 clearurgent(c);
798 detachstack(c);
799 attachstack(c);
800 grabbuttons(c, True);
801 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
802 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
803 }
804 else
805 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
806 selmon->sel = c;
807 drawbars();
808}
809
810void
811focusin(XEvent *e) { /* there are some broken focus acquiring clients */
812 XFocusChangeEvent *ev = &e->xfocus;
813
814 if(selmon->sel && ev->window != selmon->sel->win)
815 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
816}
817
818void
819focusmon(const Arg *arg) {
820 Monitor *m = NULL;
821
822 if(!mons->next)
823 return;
824 m = dirtomon(arg->i);
825 unfocus(selmon->sel);
826 selmon = m;
827 focus(NULL);
828}
829
830void
831focusstack(const Arg *arg) {
832 Client *c = NULL, *i;
833
834 if(!selmon->sel)
835 return;
836 if(arg->i > 0) {
837 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
838 if(!c)
839 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
840 }
841 else {
842 for(i = selmon->clients; i != selmon->sel; i = i->next)
843 if(ISVISIBLE(i))
844 c = i;
845 if(!c)
846 for(; i; i = i->next)
847 if(ISVISIBLE(i))
848 c = i;
849 }
850 if(c) {
851 focus(c);
852 restack(selmon);
853 }
854}
855
856unsigned long
857getcolor(const char *colstr) {
858 Colormap cmap = DefaultColormap(dpy, screen);
859 XColor color;
860
861 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
862 die("error, cannot allocate color '%s'\n", colstr);
863 return color.pixel;
864}
865
866Bool
867getrootptr(int *x, int *y) {
868 int di;
869 unsigned int dui;
870 Window dummy;
871
872 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
873}
874
875long
876getstate(Window w) {
877 int format, status;
878 long result = -1;
879 unsigned char *p = NULL;
880 unsigned long n, extra;
881 Atom real;
882
883 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
884 &real, &format, &n, &extra, (unsigned char **)&p);
885 if(status != Success)
886 return -1;
887 if(n != 0)
888 result = *p;
889 XFree(p);
890 return result;
891}
892
893Bool
894gettextprop(Window w, Atom atom, char *text, unsigned int size) {
895 char **list = NULL;
896 int n;
897 XTextProperty name;
898
899 if(!text || size == 0)
900 return False;
901 text[0] = '\0';
902 XGetTextProperty(dpy, w, &name, atom);
903 if(!name.nitems)
904 return False;
905 if(name.encoding == XA_STRING)
906 strncpy(text, (char *)name.value, size - 1);
907 else {
908 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
909 && n > 0 && *list)
910 {
911 strncpy(text, *list, size - 1);
912 XFreeStringList(list);
913 }
914 }
915 text[size - 1] = '\0';
916 XFree(name.value);
917 return True;
918}
919
920void
921grabbuttons(Client *c, Bool focused) {
922 updatenumlockmask();
923 {
924 unsigned int i, j;
925 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
926 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
927 if(focused) {
928 for(i = 0; i < LENGTH(buttons); i++)
929 if(buttons[i].click == ClkClientWin)
930 for(j = 0; j < LENGTH(modifiers); j++)
931 XGrabButton(dpy, buttons[i].button,
932 buttons[i].mask | modifiers[j],
933 c->win, False, BUTTONMASK,
934 GrabModeAsync, GrabModeSync, None, None);
935 }
936 else
937 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
938 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
939 }
940}
941
942void
943grabkeys(void) {
944 updatenumlockmask();
945 {
946 unsigned int i, j;
947 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
948 KeyCode code;
949
950 XUngrabKey(dpy, AnyKey, AnyModifier, root);
951 for(i = 0; i < LENGTH(keys); i++) {
952 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
953 for(j = 0; j < LENGTH(modifiers); j++)
954 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
955 True, GrabModeAsync, GrabModeAsync);
956 }
957 }
958}
959
960void
961initfont(const char *fontstr) {
962 char *def, **missing;
963 int i, n;
964
965 missing = NULL;
966 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
967 if(missing) {
968 while(n--)
969 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
970 XFreeStringList(missing);
971 }
972 if(dc.font.set) {
973 XFontSetExtents *font_extents;
974 XFontStruct **xfonts;
975 char **font_names;
976 dc.font.ascent = dc.font.descent = 0;
977 font_extents = XExtentsOfFontSet(dc.font.set);
978 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
979 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
980 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
981 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
982 xfonts++;
983 }
984 }
985 else {
986 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
987 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
988 die("error, cannot load font: '%s'\n", fontstr);
989 dc.font.ascent = dc.font.xfont->ascent;
990 dc.font.descent = dc.font.xfont->descent;
991 }
992 dc.font.height = dc.font.ascent + dc.font.descent;
993}
994
995Bool
996isprotodel(Client *c) {
997 int i, n;
998 Atom *protocols;
999 Bool ret = False;
1000
1001 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1002 for(i = 0; !ret && i < n; i++)
1003 if(protocols[i] == wmatom[WMDelete])
1004 ret = True;
1005 XFree(protocols);
1006 }
1007 return ret;
1008}
1009
1010void
1011keypress(XEvent *e) {
1012 unsigned int i;
1013 KeySym keysym;
1014 XKeyEvent *ev;
1015
1016 ev = &e->xkey;
1017 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1018 for(i = 0; i < LENGTH(keys); i++)
1019 if(keysym == keys[i].keysym
1020 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1021 && keys[i].func)
1022 keys[i].func(&(keys[i].arg));
1023}
1024
1025void
1026killclient(const Arg *arg) {
1027 XEvent ev;
1028
1029 if(!selmon->sel)
1030 return;
1031 if(isprotodel(selmon->sel)) {
1032 ev.type = ClientMessage;
1033 ev.xclient.window = selmon->sel->win;
1034 ev.xclient.message_type = wmatom[WMProtocols];
1035 ev.xclient.format = 32;
1036 ev.xclient.data.l[0] = wmatom[WMDelete];
1037 ev.xclient.data.l[1] = CurrentTime;
1038 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1039 }
1040 else
1041 XKillClient(dpy, selmon->sel->win);
1042}
1043
1044void
1045manage(Window w, XWindowAttributes *wa) {
1046 static Client cz;
1047 Client *c, *t = NULL;
1048 Window trans = None;
1049 XWindowChanges wc;
1050
1051 if(!(c = malloc(sizeof(Client))))
1052 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1053 *c = cz;
1054 c->win = w;
1055 if(XGetTransientForHint(dpy, w, &trans))
1056 t = wintoclient(trans);
1057 if(t) {
1058 c->mon = t->mon;
1059 c->tags = t->tags;
1060 }
1061 else {
1062 c->mon = selmon;
1063 applyrules(c);
1064 }
1065 /* geometry */
1066 c->x = wa->x + c->mon->wx;
1067 c->y = wa->y + c->mon->wy;
1068 c->w = wa->width;
1069 c->h = wa->height;
1070 c->oldbw = wa->border_width;
1071 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1072 c->x = c->mon->mx;
1073 c->y = c->mon->my;
1074 c->bw = 0;
1075 }
1076 else {
1077 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1078 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1079 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1080 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1081 c->x = MAX(c->x, c->mon->mx);
1082 /* only fix client y-offset, if the client center might cover the bar */
1083 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1084 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1085 c->bw = borderpx;
1086 }
1087 wc.border_width = c->bw;
1088 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1089 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1090 configure(c); /* propagates border_width, if size doesn't change */
1091 updatesizehints(c);
1092 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1093 grabbuttons(c, False);
1094 updatetitle(c);
1095 if(!c->isfloating)
1096 c->isfloating = trans != None || c->isfixed;
1097 if(c->isfloating)
1098 XRaiseWindow(dpy, c->win);
1099 attach(c);
1100 attachstack(c);
1101 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1102 XMapWindow(dpy, c->win);
1103 setclientstate(c, NormalState);
1104 arrange();
1105}
1106
1107void
1108mappingnotify(XEvent *e) {
1109 XMappingEvent *ev = &e->xmapping;
1110
1111 XRefreshKeyboardMapping(ev);
1112 if(ev->request == MappingKeyboard)
1113 grabkeys();
1114}
1115
1116void
1117maprequest(XEvent *e) {
1118 static XWindowAttributes wa;
1119 XMapRequestEvent *ev = &e->xmaprequest;
1120
1121 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1122 return;
1123 if(wa.override_redirect)
1124 return;
1125 if(!wintoclient(ev->window))
1126 manage(ev->window, &wa);
1127}
1128
1129void
1130monocle(Monitor *m) {
1131 Client *c;
1132
1133 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1134 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1135}
1136
1137void
1138movemouse(const Arg *arg) {
1139 int x, y, ocx, ocy, nx, ny;
1140 Client *c;
1141 Monitor *m;
1142 XEvent ev;
1143
1144 if(!(c = selmon->sel))
1145 return;
1146 restack(selmon);
1147 ocx = c->x;
1148 ocy = c->y;
1149 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1150 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1151 return;
1152 if(!getrootptr(&x, &y))
1153 return;
1154 do {
1155 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1156 switch (ev.type) {
1157 case ConfigureRequest:
1158 case Expose:
1159 case MapRequest:
1160 handler[ev.type](&ev);
1161 break;
1162 case MotionNotify:
1163 nx = ocx + (ev.xmotion.x - x);
1164 ny = ocy + (ev.xmotion.y - y);
1165 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1166 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1167 if(abs(selmon->wx - nx) < snap)
1168 nx = selmon->wx;
1169 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1170 nx = selmon->wx + selmon->ww - WIDTH(c);
1171 if(abs(selmon->wy - ny) < snap)
1172 ny = selmon->wy;
1173 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1174 ny = selmon->wy + selmon->wh - HEIGHT(c);
1175 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1176 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1177 togglefloating(NULL);
1178 }
1179 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1180 resize(c, nx, ny, c->w, c->h, True);
1181 break;
1182 }
1183 }
1184 while(ev.type != ButtonRelease);
1185 XUngrabPointer(dpy, CurrentTime);
1186 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1187 sendmon(c, m);
1188 selmon = m;
1189 focus(NULL);
1190 }
1191}
1192
1193Client *
1194nexttiled(Client *c) {
1195 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1196 return c;
1197}
1198
1199Monitor *
1200ptrtomon(int x, int y) {
1201 Monitor *m;
1202
1203 for(m = mons; m; m = m->next)
1204 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1205 return m;
1206 return selmon;
1207}
1208
1209void
1210propertynotify(XEvent *e) {
1211 Client *c;
1212 Window trans;
1213 XPropertyEvent *ev = &e->xproperty;
1214
1215 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1216 updatestatus();
1217 else if(ev->state == PropertyDelete)
1218 return; /* ignore */
1219 else if((c = wintoclient(ev->window))) {
1220 switch (ev->atom) {
1221 default: break;
1222 case XA_WM_TRANSIENT_FOR:
1223 XGetTransientForHint(dpy, c->win, &trans);
1224 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1225 arrange();
1226 break;
1227 case XA_WM_NORMAL_HINTS:
1228 updatesizehints(c);
1229 break;
1230 case XA_WM_HINTS:
1231 updatewmhints(c);
1232 drawbars();
1233 break;
1234 }
1235 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1236 updatetitle(c);
1237 if(c == selmon->sel)
1238 drawbars();
1239 }
1240 }
1241}
1242
1243void
1244quit(const Arg *arg) {
1245 running = False;
1246}
1247
1248void
1249resize(Client *c, int x, int y, int w, int h, Bool interact) {
1250 XWindowChanges wc;
1251
1252 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1253 c->x = wc.x = x;
1254 c->y = wc.y = y;
1255 c->w = wc.width = w;
1256 c->h = wc.height = h;
1257 wc.border_width = c->bw;
1258 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1259 configure(c);
1260 XSync(dpy, False);
1261 }
1262}
1263
1264void
1265resizemouse(const Arg *arg) {
1266 int ocx, ocy;
1267 int nw, nh;
1268 Client *c;
1269 Monitor *m;
1270 XEvent ev;
1271
1272 if(!(c = selmon->sel))
1273 return;
1274 restack(selmon);
1275 ocx = c->x;
1276 ocy = c->y;
1277 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1278 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1279 return;
1280 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1281 do {
1282 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1283 switch(ev.type) {
1284 case ConfigureRequest:
1285 case Expose:
1286 case MapRequest:
1287 handler[ev.type](&ev);
1288 break;
1289 case MotionNotify:
1290 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1291 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1292 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1293 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1294 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1295 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1296 togglefloating(NULL);
1297 }
1298 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1299 resize(c, c->x, c->y, nw, nh, True);
1300 break;
1301 }
1302 }
1303 while(ev.type != ButtonRelease);
1304 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1305 XUngrabPointer(dpy, CurrentTime);
1306 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1307 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1308 sendmon(c, m);
1309 selmon = m;
1310 focus(NULL);
1311 }
1312}
1313
1314void
1315restack(Monitor *m) {
1316 Client *c;
1317 XEvent ev;
1318 XWindowChanges wc;
1319
1320 drawbars();
1321 if(!m->sel)
1322 return;
1323 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1324 XRaiseWindow(dpy, m->sel->win);
1325 if(m->lt[m->sellt]->arrange) {
1326 wc.stack_mode = Below;
1327 wc.sibling = m->barwin;
1328 for(c = m->stack; c; c = c->snext)
1329 if(!c->isfloating && ISVISIBLE(c)) {
1330 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1331 wc.sibling = c->win;
1332 }
1333 }
1334 XSync(dpy, False);
1335 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1336}
1337
1338void
1339run(void) {
1340 XEvent ev;
1341
1342 /* main event loop */
1343 XSync(dpy, False);
1344 while(running && !XNextEvent(dpy, &ev))
1345 if(handler[ev.type])
1346 (handler[ev.type])(&ev); /* call handler */
1347}
1348
1349void
1350scan(void) {
1351 unsigned int i, num;
1352 Window d1, d2, *wins = NULL;
1353 XWindowAttributes wa;
1354
1355 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1356 for(i = 0; i < num; i++) {
1357 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1358 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1359 continue;
1360 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1361 manage(wins[i], &wa);
1362 }
1363 for(i = 0; i < num; i++) { /* now the transients */
1364 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1365 continue;
1366 if(XGetTransientForHint(dpy, wins[i], &d1)
1367 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1368 manage(wins[i], &wa);
1369 }
1370 if(wins)
1371 XFree(wins);
1372 }
1373}
1374
1375void
1376sendmon(Client *c, Monitor *m) {
1377 if(c->mon == m)
1378 return;
1379 unfocus(c);
1380 detach(c);
1381 detachstack(c);
1382 c->mon = m;
1383 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1384 attach(c);
1385 attachstack(c);
1386 focus(NULL);
1387 arrange();
1388}
1389
1390void
1391setclientstate(Client *c, long state) {
1392 long data[] = { state, None };
1393
1394 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1395 PropModeReplace, (unsigned char *)data, 2);
1396}
1397
1398void
1399setlayout(const Arg *arg) {
1400 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1401 selmon->sellt ^= 1;
1402 if(arg && arg->v)
1403 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1404 if(selmon->sel)
1405 arrange();
1406 else
1407 drawbars();
1408}
1409
1410/* arg > 1.0 will set mfact absolutly */
1411void
1412setmfact(const Arg *arg) {
1413 float f;
1414
1415 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1416 return;
1417 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1418 if(f < 0.1 || f > 0.9)
1419 return;
1420 selmon->mfact = f;
1421 arrange();
1422}
1423
1424void
1425setup(void) {
1426 unsigned int i;
1427 int w;
1428 XSetWindowAttributes wa;
1429
1430 /* init screen */
1431 screen = DefaultScreen(dpy);
1432 root = RootWindow(dpy, screen);
1433 initfont(font);
1434 sw = DisplayWidth(dpy, screen);
1435 sh = DisplayHeight(dpy, screen);
1436 bh = dc.h = dc.font.height + 2;
1437 updategeom();
1438 /* init atoms */
1439 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1440 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1441 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1442 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1443 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1444 /* init cursors */
1445 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1446 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1447 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1448 /* init appearance */
1449 dc.norm[ColBorder] = getcolor(normbordercolor);
1450 dc.norm[ColBG] = getcolor(normbgcolor);
1451 dc.norm[ColFG] = getcolor(normfgcolor);
1452 dc.sel[ColBorder] = getcolor(selbordercolor);
1453 dc.sel[ColBG] = getcolor(selbgcolor);
1454 dc.sel[ColFG] = getcolor(selfgcolor);
1455 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1456 dc.gc = XCreateGC(dpy, root, 0, NULL);
1457 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1458 if(!dc.font.set)
1459 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1460 /* init bars */
1461 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1462 w = TEXTW(layouts[i].symbol);
1463 blw = MAX(blw, w);
1464 }
1465 updatebars();
1466 updatestatus();
1467 /* EWMH support per view */
1468 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1469 PropModeReplace, (unsigned char *) netatom, NetLast);
1470 /* select for events */
1471 wa.cursor = cursor[CurNormal];
1472 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1473 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1474 |PropertyChangeMask;
1475 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1476 XSelectInput(dpy, root, wa.event_mask);
1477 grabkeys();
1478}
1479
1480void
1481showhide(Client *c) {
1482 if(!c)
1483 return;
1484 if(ISVISIBLE(c)) { /* show clients top down */
1485 XMoveWindow(dpy, c->win, c->x, c->y);
1486 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1487 resize(c, c->x, c->y, c->w, c->h, False);
1488 showhide(c->snext);
1489 }
1490 else { /* hide clients bottom up */
1491 showhide(c->snext);
1492 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1493 }
1494}
1495
1496
1497void
1498sigchld(int signal) {
1499 while(0 < waitpid(-1, NULL, WNOHANG));
1500}
1501
1502void
1503spawn(const Arg *arg) {
1504 signal(SIGCHLD, sigchld);
1505 if(fork() == 0) {
1506 if(dpy)
1507 close(ConnectionNumber(dpy));
1508 setsid();
1509 execvp(((char **)arg->v)[0], (char **)arg->v);
1510 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1511 perror(" failed");
1512 exit(0);
1513 }
1514}
1515
1516void
1517tag(const Arg *arg) {
1518 if(selmon->sel && arg->ui & TAGMASK) {
1519 selmon->sel->tags = arg->ui & TAGMASK;
1520 arrange();
1521 }
1522}
1523
1524void
1525tagmon(const Arg *arg) {
1526 if(!selmon->sel || !mons->next)
1527 return;
1528 sendmon(selmon->sel, dirtomon(arg->i));
1529}
1530
1531int
1532textnw(const char *text, unsigned int len) {
1533 XRectangle r;
1534
1535 if(dc.font.set) {
1536 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1537 return r.width;
1538 }
1539 return XTextWidth(dc.font.xfont, text, len);
1540}
1541
1542void
1543tile(Monitor *m) {
1544 int x, y, h, w, mw;
1545 unsigned int i, n;
1546 Client *c;
1547
1548 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1549 if(n == 0)
1550 return;
1551 /* master */
1552 c = nexttiled(m->clients);
1553 mw = m->mfact * m->ww;
1554 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1555 if(--n == 0)
1556 return;
1557 /* tile stack */
1558 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1559 y = m->wy;
1560 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1561 h = m->wh / n;
1562 if(h < bh)
1563 h = m->wh;
1564 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1565 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1566 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1567 if(h != m->wh)
1568 y = c->y + HEIGHT(c);
1569 }
1570}
1571
1572void
1573togglebar(const Arg *arg) {
1574 selmon->showbar = !selmon->showbar;
1575 updatebarpos(selmon);
1576 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1577 arrange();
1578}
1579
1580void
1581togglefloating(const Arg *arg) {
1582 if(!selmon->sel)
1583 return;
1584 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1585 if(selmon->sel->isfloating)
1586 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1587 selmon->sel->w, selmon->sel->h, False);
1588 arrange();
1589}
1590
1591void
1592toggletag(const Arg *arg) {
1593 unsigned int mask;
1594
1595 if(!selmon->sel)
1596 return;
1597 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1598 if(mask) {
1599 selmon->sel->tags = mask;
1600 arrange();
1601 }
1602}
1603
1604void
1605toggleview(const Arg *arg) {
1606 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1607
1608 if(mask) {
1609 selmon->tagset[selmon->seltags] = mask;
1610 arrange();
1611 }
1612}
1613
1614void
1615unfocus(Client *c) {
1616 if(!c)
1617 return;
1618 grabbuttons(c, False);
1619 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1620 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1621}
1622
1623void
1624unmanage(Client *c) {
1625 XWindowChanges wc;
1626
1627 wc.border_width = c->oldbw;
1628 /* The server grab construct avoids race conditions. */
1629 XGrabServer(dpy);
1630 XSetErrorHandler(xerrordummy);
1631 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1632 detach(c);
1633 detachstack(c);
1634 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1635 setclientstate(c, WithdrawnState);
1636 free(c);
1637 XSync(dpy, False);
1638 XSetErrorHandler(xerror);
1639 XUngrabServer(dpy);
1640 focus(NULL);
1641 arrange();
1642}
1643
1644void
1645unmapnotify(XEvent *e) {
1646 Client *c;
1647 XUnmapEvent *ev = &e->xunmap;
1648
1649 if((c = wintoclient(ev->window)))
1650 unmanage(c);
1651}
1652
1653void
1654updatebars(void) {
1655 Monitor *m;
1656 XSetWindowAttributes wa;
1657
1658 wa.override_redirect = True;
1659 wa.background_pixmap = ParentRelative;
1660 wa.event_mask = ButtonPressMask|ExposureMask;
1661 for(m = mons; m; m = m->next) {
1662 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1663 CopyFromParent, DefaultVisual(dpy, screen),
1664 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1665 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1666 XMapRaised(dpy, m->barwin);
1667 }
1668}
1669
1670void
1671updatebarpos(Monitor *m) {
1672 m->wy = m->my;
1673 m->wh = m->mh;
1674 if(m->showbar) {
1675 m->wh -= bh;
1676 m->by = m->topbar ? m->wy : m->wy + m->wh;
1677 m->wy = m->topbar ? m->wy + bh : m->wy;
1678 }
1679 else
1680 m->by = -bh;
1681}
1682
1683void
1684updategeom(void) {
1685 int i, n = 1;
1686 Client *c;
1687 Monitor *newmons = NULL, *m = NULL, *tm;
1688
1689#ifdef XINERAMA
1690 XineramaScreenInfo *info = NULL;
1691
1692 if(XineramaIsActive(dpy))
1693 info = XineramaQueryScreens(dpy, &n);
1694#endif /* XINERAMA */
1695 /* allocate monitor(s) for the new geometry setup */
1696 for(i = 0; i < n; i++) {
1697 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1698 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1699 m->next = newmons;
1700 newmons = m;
1701 }
1702 /* initialise monitor(s) */
1703#ifdef XINERAMA
1704 if(XineramaIsActive(dpy)) {
1705 for(i = 0, m = newmons; m; m = m->next, i++) {
1706 m->num = info[i].screen_number;
1707 m->mx = m->wx = info[i].x_org;
1708 m->my = m->wy = info[i].y_org;
1709 m->mw = m->ww = info[i].width;
1710 m->mh = m->wh = info[i].height;
1711 }
1712 XFree(info);
1713 }
1714 else
1715#endif /* XINERAMA */
1716 /* default monitor setup */
1717 {
1718 m->num = 0;
1719 m->mx = m->wx = 0;
1720 m->my = m->wy = 0;
1721 m->mw = m->ww = sw;
1722 m->mh = m->wh = sh;
1723 }
1724 /* bar geometry setup */
1725 for(m = newmons; m; m = m->next) {
1726 m->sel = m->stack = m->clients = NULL;
1727 m->seltags = 0;
1728 m->sellt = 0;
1729 m->tagset[0] = m->tagset[1] = 1;
1730 m->mfact = mfact;
1731 m->showbar = showbar;
1732 m->topbar = topbar;
1733 m->lt[0] = &layouts[0];
1734 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1735 updatebarpos(m);
1736 }
1737 /* reassign left over clients of disappeared monitors */
1738 for(tm = mons; tm; tm = tm->next)
1739 while(tm->clients) {
1740 c = tm->clients;
1741 tm->clients = c->next;
1742 detachstack(c);
1743 c->mon = newmons;
1744 attach(c);
1745 attachstack(c);
1746 }
1747 /* select focused monitor */
1748 cleanupmons();
1749 selmon = mons = newmons;
1750 selmon = wintomon(root);
1751}
1752
1753void
1754updatenumlockmask(void) {
1755 unsigned int i, j;
1756 XModifierKeymap *modmap;
1757
1758 numlockmask = 0;
1759 modmap = XGetModifierMapping(dpy);
1760 for(i = 0; i < 8; i++)
1761 for(j = 0; j < modmap->max_keypermod; j++)
1762 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1763 == XKeysymToKeycode(dpy, XK_Num_Lock))
1764 numlockmask = (1 << i);
1765 XFreeModifiermap(modmap);
1766}
1767
1768void
1769updatesizehints(Client *c) {
1770 long msize;
1771 XSizeHints size;
1772
1773 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1774 /* size is uninitialized, ensure that size.flags aren't used */
1775 size.flags = PSize;
1776 if(size.flags & PBaseSize) {
1777 c->basew = size.base_width;
1778 c->baseh = size.base_height;
1779 }
1780 else if(size.flags & PMinSize) {
1781 c->basew = size.min_width;
1782 c->baseh = size.min_height;
1783 }
1784 else
1785 c->basew = c->baseh = 0;
1786 if(size.flags & PResizeInc) {
1787 c->incw = size.width_inc;
1788 c->inch = size.height_inc;
1789 }
1790 else
1791 c->incw = c->inch = 0;
1792 if(size.flags & PMaxSize) {
1793 c->maxw = size.max_width;
1794 c->maxh = size.max_height;
1795 }
1796 else
1797 c->maxw = c->maxh = 0;
1798 if(size.flags & PMinSize) {
1799 c->minw = size.min_width;
1800 c->minh = size.min_height;
1801 }
1802 else if(size.flags & PBaseSize) {
1803 c->minw = size.base_width;
1804 c->minh = size.base_height;
1805 }
1806 else
1807 c->minw = c->minh = 0;
1808 if(size.flags & PAspect) {
1809 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1810 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1811 }
1812 else
1813 c->maxa = c->mina = 0.0;
1814 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1815 && c->maxw == c->minw && c->maxh == c->minh);
1816}
1817
1818void
1819updatetitle(Client *c) {
1820 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1821 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1822}
1823
1824void
1825updatestatus(void) {
1826 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1827 strcpy(stext, "dwm-"VERSION);
1828 drawbar(selmon);
1829}
1830
1831void
1832updatewmhints(Client *c) {
1833 XWMHints *wmh;
1834
1835 if((wmh = XGetWMHints(dpy, c->win))) {
1836 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1837 wmh->flags &= ~XUrgencyHint;
1838 XSetWMHints(dpy, c->win, wmh);
1839 }
1840 else
1841 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1842 XFree(wmh);
1843 }
1844}
1845
1846void
1847view(const Arg *arg) {
1848 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1849 return;
1850 selmon->seltags ^= 1; /* toggle sel tagset */
1851 if(arg->ui & TAGMASK)
1852 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1853 arrange();
1854}
1855
1856Client *
1857wintoclient(Window w) {
1858 Client *c;
1859 Monitor *m;
1860
1861 for(m = mons; m; m = m->next)
1862 for(c = m->clients; c; c = c->next)
1863 if(c->win == w)
1864 return c;
1865 return NULL;
1866}
1867
1868Monitor *
1869wintomon(Window w) {
1870 int x, y;
1871 Client *c;
1872 Monitor *m;
1873
1874 if(w == root && getrootptr(&x, &y))
1875 return ptrtomon(x, y);
1876 for(m = mons; m; m = m->next)
1877 if(w == m->barwin)
1878 return m;
1879 if((c = wintoclient(w)))
1880 return c->mon;
1881 return selmon;
1882}
1883
1884/* There's no way to check accesses to destroyed windows, thus those cases are
1885 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1886 * default error handler, which may call exit. */
1887int
1888xerror(Display *dpy, XErrorEvent *ee) {
1889 if(ee->error_code == BadWindow
1890 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1891 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1892 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1893 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1894 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1895 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1896 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1897 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1898 return 0;
1899 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1900 ee->request_code, ee->error_code);
1901 return xerrorxlib(dpy, ee); /* may call exit */
1902}
1903
1904int
1905xerrordummy(Display *dpy, XErrorEvent *ee) {
1906 return 0;
1907}
1908
1909/* Startup Error handler to check if another window manager
1910 * is already running. */
1911int
1912xerrorstart(Display *dpy, XErrorEvent *ee) {
1913 otherwm = True;
1914 return -1;
1915}
1916
1917void
1918zoom(const Arg *arg) {
1919 Client *c = selmon->sel;
1920
1921 if(!selmon->lt[selmon->sellt]->arrange
1922 || selmon->lt[selmon->sellt]->arrange == monocle
1923 || (selmon->sel && selmon->sel->isfloating))
1924 return;
1925 if(c == nexttiled(selmon->clients))
1926 if(!c || !(c = nexttiled(c->next)))
1927 return;
1928 detach(c);
1929 attach(c);
1930 focus(c);
1931 arrange();
1932}
1933
1934int
1935main(int argc, char *argv[]) {
1936 if(argc == 2 && !strcmp("-v", argv[1]))
1937 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1938 else if(argc != 1)
1939 die("usage: dwm [-v]\n");
1940 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1941 fputs("warning: no locale support\n", stderr);
1942 if(!(dpy = XOpenDisplay(NULL)))
1943 die("dwm: cannot open display\n");
1944 checkotherwm();
1945 setup();
1946 scan();
1947 run();
1948 cleanup();
1949 XCloseDisplay(dpy);
1950 return 0;
1951}