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 /* 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 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 int screen_number;
125 float mfact;
126 int by, btx; /* 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};
140
141typedef struct {
142 const char *class;
143 const char *instance;
144 const char *title;
145 unsigned int tags;
146 Bool isfloating;
147} Rule;
148
149/* function declarations */
150static void applyrules(Client *c);
151static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h);
152static void arrange(void);
153static void attach(Client *c);
154static void attachstack(Client *c);
155static void buttonpress(XEvent *e);
156static void checkotherwm(void);
157static void cleanup(void);
158static void cleanupmons(void);
159static void clearurgent(Client *c);
160static void configure(Client *c);
161static void configurenotify(XEvent *e);
162static void configurerequest(XEvent *e);
163static void destroynotify(XEvent *e);
164static void detach(Client *c);
165static void detachstack(Client *c);
166static void die(const char *errstr, ...);
167static void drawbar(Monitor *m);
168static void drawbars(void);
169static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
170static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
171static void enternotify(XEvent *e);
172static void expose(XEvent *e);
173static void focus(Client *c);
174static void focusin(XEvent *e);
175static void focusstack(const Arg *arg);
176static unsigned long getcolor(const char *colstr);
177static Bool getrootpointer(int *x, int *y);
178static long getstate(Window w);
179static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
180static void grabbuttons(Client *c, Bool focused);
181static void grabkeys(void);
182static Monitor *idxtomon(unsigned int n);
183static void initfont(const char *fontstr);
184static Bool isprotodel(Client *c);
185static void keypress(XEvent *e);
186static void killclient(const Arg *arg);
187static void manage(Window w, XWindowAttributes *wa);
188static void mappingnotify(XEvent *e);
189static void maprequest(XEvent *e);
190static void monocle(Monitor *m);
191static void movemouse(const Arg *arg);
192static Client *nexttiled(Client *c);
193static Monitor *pointertomon(int x, int y);
194static void propertynotify(XEvent *e);
195static void quit(const Arg *arg);
196static void resize(Client *c, int x, int y, int w, int h);
197static void resizemouse(const Arg *arg);
198static void restack(Monitor *m);
199static void run(void);
200static void scan(void);
201static void sendmon(Client *c, Monitor *m);
202static void setclientstate(Client *c, long state);
203static void setlayout(const Arg *arg);
204static void setmfact(const Arg *arg);
205static void setup(void);
206static void showhide(Client *c);
207static void sigchld(int signal);
208static void spawn(const Arg *arg);
209static void tag(const Arg *arg);
210static int textnw(const char *text, unsigned int len);
211static void tile(Monitor *);
212static void togglebar(const Arg *arg);
213static void togglefloating(const Arg *arg);
214static void toggletag(const Arg *arg);
215static void toggleview(const Arg *arg);
216static void unfocus(Client *c);
217static void unmanage(Client *c);
218static void unmapnotify(XEvent *e);
219static void updategeom(void);
220static void updatebarpos(Monitor *m);
221static void updatebars(void);
222static void updatenumlockmask(void);
223static void updatesizehints(Client *c);
224static void updatestatus(void);
225static void updatetitle(Client *c);
226static void updatewmhints(Client *c);
227static void view(const Arg *arg);
228static Client *wintoclient(Window w);
229static Monitor *wintomon(Window w);
230static int xerror(Display *dpy, XErrorEvent *ee);
231static int xerrordummy(Display *dpy, XErrorEvent *ee);
232static int xerrorstart(Display *dpy, XErrorEvent *ee);
233static void zoom(const Arg *arg);
234#ifdef XINERAMA
235static void focusmon(const Arg *arg);
236static void tagmon(const Arg *arg);
237#endif /* XINERAMA */
238
239/* variables */
240static char stext[256];
241static int screen;
242static int sx, sy, sw, sh; /* X display screen geometry x, y, 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 Layout *lt[] = { NULL, NULL };
267static Monitor *mons = NULL, *selmon = NULL;
268static Window root;
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 Rule *r;
280 XClassHint ch = { 0 };
281
282 /* rule matching */
283 c->isfloating = c->tags = 0;
284 if(XGetClassHint(dpy, c->win, &ch)) {
285 for(i = 0; i < LENGTH(rules); i++) {
286 r = &rules[i];
287 if((!r->title || strstr(c->name, r->title))
288 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
289 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
290 c->isfloating = r->isfloating;
291 c->tags |= r->tags;
292 }
293 }
294 if(ch.res_class)
295 XFree(ch.res_class);
296 if(ch.res_name)
297 XFree(ch.res_name);
298 }
299 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
300}
301
302Bool
303applysizehints(Client *c, int *x, int *y, int *w, int *h) {
304 Bool baseismin;
305
306 /* set minimum possible */
307 *w = MAX(1, *w);
308 *h = MAX(1, *h);
309
310 if(*x > sx + sw)
311 *x = sw - WIDTH(c);
312 if(*y > sy + sh)
313 *y = sh - HEIGHT(c);
314 if(*x + *w + 2 * c->bw < sx)
315 *x = sx;
316 if(*y + *h + 2 * c->bw < sy)
317 *y = sy;
318 if(*h < bh)
319 *h = bh;
320 if(*w < bh)
321 *w = bh;
322
323 if(resizehints || c->isfloating) {
324 /* see last two sentences in ICCCM 4.1.2.3 */
325 baseismin = c->basew == c->minw && c->baseh == c->minh;
326
327 if(!baseismin) { /* temporarily remove base dimensions */
328 *w -= c->basew;
329 *h -= c->baseh;
330 }
331
332 /* adjust for aspect limits */
333 if(c->mina > 0 && c->maxa > 0) {
334 if(c->maxa < (float)*w / *h)
335 *w = *h * c->maxa;
336 else if(c->mina < (float)*h / *w)
337 *h = *w * c->mina;
338 }
339
340 if(baseismin) { /* increment calculation requires this */
341 *w -= c->basew;
342 *h -= c->baseh;
343 }
344
345 /* adjust for increment value */
346 if(c->incw)
347 *w -= *w % c->incw;
348 if(c->inch)
349 *h -= *h % c->inch;
350
351 /* restore base dimensions */
352 *w += c->basew;
353 *h += c->baseh;
354
355 *w = MAX(*w, c->minw);
356 *h = MAX(*h, c->minh);
357
358 if(c->maxw)
359 *w = MIN(*w, c->maxw);
360
361 if(c->maxh)
362 *h = MIN(*h, c->maxh);
363 }
364 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
365}
366
367void
368arrange(void) {
369 Monitor *m;
370
371 /* optimise two loops into one, check focus(NULL) */
372 for(m = mons; m; m = m->next)
373 showhide(m->stack);
374 focus(NULL);
375 for(m = mons; m; m = m->next) {
376 if(lt[m->sellt]->arrange)
377 lt[m->sellt]->arrange(m);
378 restack(m);
379 }
380}
381
382void
383attach(Client *c) {
384 c->next = c->mon->clients;
385 c->mon->clients = c;
386}
387
388void
389attachstack(Client *c) {
390 c->snext = c->mon->stack;
391 c->mon->stack = c;
392}
393
394void
395buttonpress(XEvent *e) {
396 unsigned int i, x, click;
397 Arg arg = {0};
398 Client *c;
399 Monitor *m;
400 XButtonPressedEvent *ev = &e->xbutton;
401
402 click = ClkRootWin;
403 /* focus monitor if necessary */
404 if((m = wintomon(ev->window)) && m != selmon) {
405 unfocus(selmon->sel);
406 selmon = m;
407 focus(NULL);
408 }
409 if(ev->window == selmon->barwin && ev->x >= selmon->btx) {
410 i = 0;
411 x = selmon->btx;
412 do
413 x += TEXTW(tags[i]);
414 while(ev->x >= x && ++i < LENGTH(tags));
415 if(i < LENGTH(tags)) {
416 click = ClkTagBar;
417 arg.ui = 1 << i;
418 }
419 else if(ev->x < x + blw)
420 click = ClkLtSymbol;
421 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
422 click = ClkStatusText;
423 else
424 click = ClkWinTitle;
425 }
426 else if((c = wintoclient(ev->window))) {
427 focus(c);
428 click = ClkClientWin;
429 }
430
431 for(i = 0; i < LENGTH(buttons); i++)
432 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
433 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
434 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
435}
436
437void
438checkotherwm(void) {
439 otherwm = False;
440 xerrorxlib = XSetErrorHandler(xerrorstart);
441
442 /* this causes an error if some other window manager is running */
443 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
444 XSync(dpy, False);
445 if(otherwm)
446 die("dwm: another window manager is already running\n");
447 XSetErrorHandler(xerror);
448 XSync(dpy, False);
449}
450
451void
452cleanup(void) {
453 Arg a = {.ui = ~0};
454 Layout foo = { "", NULL };
455 Monitor *m;
456
457 view(&a);
458 lt[selmon->sellt] = &foo;
459 for(m = mons; m; m = m->next)
460 while(m->stack)
461 unmanage(m->stack);
462 if(dc.font.set)
463 XFreeFontSet(dpy, dc.font.set);
464 else
465 XFreeFont(dpy, dc.font.xfont);
466 XUngrabKey(dpy, AnyKey, AnyModifier, root);
467 XFreePixmap(dpy, dc.drawable);
468 XFreeGC(dpy, dc.gc);
469 XFreeCursor(dpy, cursor[CurNormal]);
470 XFreeCursor(dpy, cursor[CurResize]);
471 XFreeCursor(dpy, cursor[CurMove]);
472 cleanupmons();
473 XSync(dpy, False);
474 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
475}
476
477void
478cleanupmons(void) {
479 Monitor *m;
480
481 while(mons) {
482 m = mons->next;
483 XUnmapWindow(dpy, mons->barwin);
484 XDestroyWindow(dpy, mons->barwin);
485 free(mons);
486 mons = m;
487 }
488}
489
490void
491clearurgent(Client *c) {
492 XWMHints *wmh;
493
494 c->isurgent = False;
495 if(!(wmh = XGetWMHints(dpy, c->win)))
496 return;
497 wmh->flags &= ~XUrgencyHint;
498 XSetWMHints(dpy, c->win, wmh);
499 XFree(wmh);
500}
501
502void
503configure(Client *c) {
504 XConfigureEvent ce;
505
506 ce.type = ConfigureNotify;
507 ce.display = dpy;
508 ce.event = c->win;
509 ce.window = c->win;
510 ce.x = c->x;
511 ce.y = c->y;
512 ce.width = c->w;
513 ce.height = c->h;
514 ce.border_width = c->bw;
515 ce.above = None;
516 ce.override_redirect = False;
517 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
518}
519
520void
521configurenotify(XEvent *e) {
522 Monitor *m;
523 XConfigureEvent *ev = &e->xconfigure;
524
525 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
526 sw = ev->width;
527 sh = ev->height;
528 updategeom();
529 if(dc.drawable != 0)
530 XFreePixmap(dpy, dc.drawable);
531 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
532 updatebars();
533 for(m = mons; m; m = m->next)
534 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
535 arrange();
536 }
537}
538
539void
540configurerequest(XEvent *e) {
541 Client *c;
542 Monitor *m;
543 XConfigureRequestEvent *ev = &e->xconfigurerequest;
544 XWindowChanges wc;
545
546 if((c = wintoclient(ev->window))) {
547 if(ev->value_mask & CWBorderWidth)
548 c->bw = ev->border_width;
549 else if(c->isfloating || !lt[selmon->sellt]->arrange) {
550 m = c->mon;
551 if(ev->value_mask & CWX)
552 c->x = m->mx + ev->x;
553 if(ev->value_mask & CWY)
554 c->y = m->my + ev->y;
555 if(ev->value_mask & CWWidth)
556 c->w = ev->width;
557 if(ev->value_mask & CWHeight)
558 c->h = ev->height;
559 if((c->x - m->mx + c->w) > m->mw && c->isfloating)
560 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
561 if((c->y - m->my + c->h) > m->mh && c->isfloating)
562 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
563 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
564 configure(c);
565 if(ISVISIBLE(c))
566 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
567 }
568 else
569 configure(c);
570 }
571 else {
572 wc.x = ev->x;
573 wc.y = ev->y;
574 wc.width = ev->width;
575 wc.height = ev->height;
576 wc.border_width = ev->border_width;
577 wc.sibling = ev->above;
578 wc.stack_mode = ev->detail;
579 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
580 }
581 XSync(dpy, False);
582}
583
584void
585destroynotify(XEvent *e) {
586 Client *c;
587 XDestroyWindowEvent *ev = &e->xdestroywindow;
588
589 if((c = wintoclient(ev->window)))
590 unmanage(c);
591}
592
593void
594detach(Client *c) {
595 Client **tc;
596
597 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
598 *tc = c->next;
599}
600
601void
602detachstack(Client *c) {
603 Client **tc;
604
605 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
606 *tc = c->snext;
607
608 if(c == c->mon->sel) {
609 for(*tc = c->mon->stack; *tc && !ISVISIBLE((*tc)); *tc = (*tc)->snext);
610 c->mon->sel = *tc;
611 }
612}
613
614void
615die(const char *errstr, ...) {
616 va_list ap;
617
618 va_start(ap, errstr);
619 vfprintf(stderr, errstr, ap);
620 va_end(ap);
621 exit(EXIT_FAILURE);
622}
623
624void
625drawbar(Monitor *m) {
626 int x;
627 unsigned int i, occ = 0, urg = 0;
628 unsigned long *col;
629 Client *c;
630
631 for(c = m->clients; c; c = c->next) {
632 occ |= c->tags;
633 if(c->isurgent)
634 urg |= c->tags;
635 }
636
637 dc.x = 0;
638#ifdef XINERAMA
639 {
640 char buf[2];
641 buf[0] = m->screen_number + '0';
642 buf[1] = '\0';
643 dc.w = TEXTW(buf);
644 drawtext(buf, selmon == m ? dc.sel : dc.norm, True);
645 dc.x += dc.w;
646 }
647#endif /* XINERAMA */
648 m->btx = dc.x;
649 for(i = 0; i < LENGTH(tags); i++) {
650 dc.w = TEXTW(tags[i]);
651 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
652 drawtext(tags[i], col, urg & 1 << i);
653 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
654 occ & 1 << i, urg & 1 << i, col);
655 dc.x += dc.w;
656 }
657 if(blw > 0) {
658 dc.w = blw;
659 drawtext(lt[m->sellt]->symbol, dc.norm, False);
660 x = dc.x + dc.w;
661 }
662 else
663 x = dc.x;
664 if(m == selmon) { /* status is only drawn on selected monitor */
665 dc.w = TEXTW(stext);
666 dc.x = m->ww - dc.w;
667 if(dc.x < x) {
668 dc.x = x;
669 dc.w = m->ww - x;
670 }
671 drawtext(stext, dc.norm, False);
672 }
673 else {
674 dc.x = m->ww;
675 }
676 if((dc.w = dc.x - x) > bh) {
677 dc.x = x;
678 if(m->sel) {
679 col = m == selmon ? dc.sel : dc.norm;
680 drawtext(m->sel->name, col, False);
681 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
682 }
683 else
684 drawtext(NULL, dc.norm, False);
685 }
686 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
687 XSync(dpy, False);
688}
689
690void
691drawbars(void) {
692 Monitor *m;
693
694 for(m = mons; m; m = m->next)
695 drawbar(m);
696}
697
698void
699drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
700 int x;
701 XGCValues gcv;
702 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
703
704 gcv.foreground = col[invert ? ColBG : ColFG];
705 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
706 x = (dc.font.ascent + dc.font.descent + 2) / 4;
707 r.x = dc.x + 1;
708 r.y = dc.y + 1;
709 if(filled) {
710 r.width = r.height = x + 1;
711 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
712 }
713 else if(empty) {
714 r.width = r.height = x;
715 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
716 }
717}
718
719void
720drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
721 char buf[256];
722 int i, x, y, h, len, olen;
723 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
724
725 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
726 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
727 if(!text)
728 return;
729 olen = strlen(text);
730 h = dc.font.ascent + dc.font.descent;
731 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
732 x = dc.x + (h / 2);
733 /* shorten text if necessary */
734 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
735 if(!len)
736 return;
737 memcpy(buf, text, len);
738 if(len < olen)
739 for(i = len; i && i > len - 3; buf[--i] = '.');
740 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
741 if(dc.font.set)
742 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
743 else
744 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
745}
746
747void
748enternotify(XEvent *e) {
749 Client *c;
750 Monitor *m;
751 XCrossingEvent *ev = &e->xcrossing;
752
753 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
754 return;
755 if((m = wintomon(ev->window)) && m != selmon) {
756 unfocus(selmon->sel);
757 selmon = m;
758 }
759 if((c = wintoclient(ev->window)))
760 focus(c);
761 else
762 focus(NULL);
763}
764
765void
766expose(XEvent *e) {
767 Monitor *m;
768 XExposeEvent *ev = &e->xexpose;
769
770 if(ev->count == 0 && (m = wintomon(ev->window)))
771 drawbar(m);
772}
773
774void
775focus(Client *c) {
776 if(!c || !ISVISIBLE(c))
777 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
778 if(selmon->sel)
779 unfocus(selmon->sel);
780 if(c) {
781 if(c->mon != selmon)
782 selmon = c->mon;
783 if(c->isurgent)
784 clearurgent(c);
785 detachstack(c);
786 attachstack(c);
787 grabbuttons(c, True);
788 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
789 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
790 }
791 else
792 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
793 selmon->sel = c;
794 drawbars();
795}
796
797void
798focusin(XEvent *e) { /* there are some broken focus acquiring clients */
799 XFocusChangeEvent *ev = &e->xfocus;
800
801 if(selmon->sel && ev->window != selmon->sel->win)
802 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
803}
804
805#ifdef XINERAMA
806void
807focusmon(const Arg *arg) {
808 Monitor *m;
809
810 if(!(m = idxtomon(arg->ui)) || m == selmon)
811 return;
812 unfocus(selmon->sel);
813 selmon = m;
814 focus(NULL);
815}
816#endif /* XINERAMA */
817
818void
819focusstack(const Arg *arg) {
820 Client *c = NULL, *i;
821
822 if(!selmon->sel)
823 return;
824 if(arg->i > 0) {
825 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
826 if(!c)
827 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
828 }
829 else {
830 for(i = selmon->clients; i != selmon->sel; i = i->next)
831 if(ISVISIBLE(i))
832 c = i;
833 if(!c)
834 for(; i; i = i->next)
835 if(ISVISIBLE(i))
836 c = i;
837 }
838 if(c) {
839 focus(c);
840 restack(selmon);
841 }
842}
843
844unsigned long
845getcolor(const char *colstr) {
846 Colormap cmap = DefaultColormap(dpy, screen);
847 XColor color;
848
849 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
850 die("error, cannot allocate color '%s'\n", colstr);
851 return color.pixel;
852}
853
854Bool
855getrootpointer(int *x, int *y) {
856 int di;
857 unsigned int dui;
858 Window dummy;
859 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
860}
861
862long
863getstate(Window w) {
864 int format, status;
865 long result = -1;
866 unsigned char *p = NULL;
867 unsigned long n, extra;
868 Atom real;
869
870 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
871 &real, &format, &n, &extra, (unsigned char **)&p);
872 if(status != Success)
873 return -1;
874 if(n != 0)
875 result = *p;
876 XFree(p);
877 return result;
878}
879
880Bool
881gettextprop(Window w, Atom atom, char *text, unsigned int size) {
882 char **list = NULL;
883 int n;
884 XTextProperty name;
885
886 if(!text || size == 0)
887 return False;
888 text[0] = '\0';
889 XGetTextProperty(dpy, w, &name, atom);
890 if(!name.nitems)
891 return False;
892 if(name.encoding == XA_STRING)
893 strncpy(text, (char *)name.value, size - 1);
894 else {
895 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
896 && n > 0 && *list) {
897 strncpy(text, *list, size - 1);
898 XFreeStringList(list);
899 }
900 }
901 text[size - 1] = '\0';
902 XFree(name.value);
903 return True;
904}
905
906void
907grabbuttons(Client *c, Bool focused) {
908 updatenumlockmask();
909 {
910 unsigned int i, j;
911 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
912 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
913 if(focused) {
914 for(i = 0; i < LENGTH(buttons); i++)
915 if(buttons[i].click == ClkClientWin)
916 for(j = 0; j < LENGTH(modifiers); j++)
917 XGrabButton(dpy, buttons[i].button,
918 buttons[i].mask | modifiers[j],
919 c->win, False, BUTTONMASK,
920 GrabModeAsync, GrabModeSync, None, None);
921 } else
922 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
923 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
924 }
925}
926
927void
928grabkeys(void) {
929 updatenumlockmask();
930 { /* grab keys */
931 unsigned int i, j;
932 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
933 KeyCode code;
934
935 XUngrabKey(dpy, AnyKey, AnyModifier, root);
936 for(i = 0; i < LENGTH(keys); i++) {
937 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
938 for(j = 0; j < LENGTH(modifiers); j++)
939 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
940 True, GrabModeAsync, GrabModeAsync);
941 }
942 }
943}
944
945Monitor *
946idxtomon(unsigned int n) {
947 unsigned int i;
948 Monitor *m;
949
950 for(m = mons, i = 0; m && i != n; m = m->next, i++);
951 return m;
952}
953
954void
955initfont(const char *fontstr) {
956 char *def, **missing;
957 int i, n;
958
959 missing = NULL;
960 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
961 if(missing) {
962 while(n--)
963 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
964 XFreeStringList(missing);
965 }
966 if(dc.font.set) {
967 XFontSetExtents *font_extents;
968 XFontStruct **xfonts;
969 char **font_names;
970 dc.font.ascent = dc.font.descent = 0;
971 font_extents = XExtentsOfFontSet(dc.font.set);
972 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
973 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
974 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
975 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
976 xfonts++;
977 }
978 }
979 else {
980 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
981 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
982 die("error, cannot load font: '%s'\n", fontstr);
983 dc.font.ascent = dc.font.xfont->ascent;
984 dc.font.descent = dc.font.xfont->descent;
985 }
986 dc.font.height = dc.font.ascent + dc.font.descent;
987}
988
989Bool
990isprotodel(Client *c) {
991 int i, n;
992 Atom *protocols;
993 Bool ret = False;
994
995 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
996 for(i = 0; !ret && i < n; i++)
997 if(protocols[i] == wmatom[WMDelete])
998 ret = True;
999 XFree(protocols);
1000 }
1001 return ret;
1002}
1003
1004void
1005keypress(XEvent *e) {
1006 unsigned int i;
1007 KeySym keysym;
1008 XKeyEvent *ev;
1009
1010 ev = &e->xkey;
1011 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1012 for(i = 0; i < LENGTH(keys); i++)
1013 if(keysym == keys[i].keysym
1014 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1015 && keys[i].func)
1016 keys[i].func(&(keys[i].arg));
1017}
1018
1019void
1020killclient(const Arg *arg) {
1021 XEvent ev;
1022
1023 if(!selmon->sel)
1024 return;
1025 if(isprotodel(selmon->sel)) {
1026 ev.type = ClientMessage;
1027 ev.xclient.window = selmon->sel->win;
1028 ev.xclient.message_type = wmatom[WMProtocols];
1029 ev.xclient.format = 32;
1030 ev.xclient.data.l[0] = wmatom[WMDelete];
1031 ev.xclient.data.l[1] = CurrentTime;
1032 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1033 }
1034 else
1035 XKillClient(dpy, selmon->sel->win);
1036}
1037
1038void
1039manage(Window w, XWindowAttributes *wa) {
1040 static Client cz;
1041 Client *c, *t = NULL;
1042 Window trans = None;
1043 XWindowChanges wc;
1044
1045 if(!(c = malloc(sizeof(Client))))
1046 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1047 *c = cz;
1048 c->win = w;
1049 c->mon = selmon;
1050
1051 /* geometry */
1052 c->x = wa->x + selmon->wx;
1053 c->y = wa->y + selmon->wy;
1054 c->w = wa->width;
1055 c->h = wa->height;
1056 c->oldbw = wa->border_width;
1057 if(c->w == selmon->mw && c->h == selmon->mh) {
1058 c->x = selmon->mx;
1059 c->y = selmon->my;
1060 c->bw = 0;
1061 }
1062 else {
1063 if(c->x + WIDTH(c) > selmon->mx + selmon->mw)
1064 c->x = selmon->mx + selmon->mw - WIDTH(c);
1065 if(c->y + HEIGHT(c) > selmon->my + selmon->mh)
1066 c->y = selmon->my + selmon->mh - HEIGHT(c);
1067 c->x = MAX(c->x, selmon->mx);
1068 /* only fix client y-offset, if the client center might cover the bar */
1069 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1070 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : selmon->my);
1071 c->bw = borderpx;
1072 }
1073
1074 wc.border_width = c->bw;
1075 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1076 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1077 configure(c); /* propagates border_width, if size doesn't change */
1078 updatesizehints(c);
1079 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1080 grabbuttons(c, False);
1081 updatetitle(c);
1082 if(XGetTransientForHint(dpy, w, &trans))
1083 t = wintoclient(trans);
1084 if(t)
1085 c->tags = t->tags;
1086 else
1087 applyrules(c);
1088 if(!c->isfloating)
1089 c->isfloating = trans != None || c->isfixed;
1090 if(c->isfloating)
1091 XRaiseWindow(dpy, c->win);
1092 attach(c);
1093 attachstack(c);
1094 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1095 XMapWindow(dpy, c->win);
1096 setclientstate(c, NormalState);
1097 arrange();
1098}
1099
1100void
1101mappingnotify(XEvent *e) {
1102 XMappingEvent *ev = &e->xmapping;
1103
1104 XRefreshKeyboardMapping(ev);
1105 if(ev->request == MappingKeyboard)
1106 grabkeys();
1107}
1108
1109void
1110maprequest(XEvent *e) {
1111 static XWindowAttributes wa;
1112 XMapRequestEvent *ev = &e->xmaprequest;
1113
1114 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1115 return;
1116 if(wa.override_redirect)
1117 return;
1118 if(!wintoclient(ev->window))
1119 manage(ev->window, &wa);
1120}
1121
1122void
1123monocle(Monitor *m) {
1124 Client *c;
1125
1126 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1127 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw);
1128}
1129
1130void
1131movemouse(const Arg *arg) {
1132 int x, y, ocx, ocy, nx, ny;
1133 Client *c;
1134 Monitor *m;
1135 XEvent ev;
1136
1137 if(!(c = selmon->sel))
1138 return;
1139 restack(selmon);
1140 ocx = c->x;
1141 ocy = c->y;
1142 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1143 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1144 return;
1145 if(!getrootpointer(&x, &y))
1146 return;
1147 do {
1148 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1149 switch (ev.type) {
1150 case ConfigureRequest:
1151 case Expose:
1152 case MapRequest:
1153 handler[ev.type](&ev);
1154 break;
1155 case MotionNotify:
1156 nx = ocx + (ev.xmotion.x - x);
1157 ny = ocy + (ev.xmotion.y - y);
1158 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1159 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1160 if(abs(selmon->wx - nx) < snap)
1161 nx = selmon->wx;
1162 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1163 nx = selmon->wx + selmon->ww - WIDTH(c);
1164 if(abs(selmon->wy - ny) < snap)
1165 ny = selmon->wy;
1166 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1167 ny = selmon->wy + selmon->wh - HEIGHT(c);
1168 if(!c->isfloating && lt[selmon->sellt]->arrange
1169 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1170 togglefloating(NULL);
1171 }
1172 if(!lt[selmon->sellt]->arrange || c->isfloating)
1173 resize(c, nx, ny, c->w, c->h);
1174 break;
1175 }
1176 }
1177 while(ev.type != ButtonRelease);
1178 XUngrabPointer(dpy, CurrentTime);
1179 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1180 sendmon(c, m);
1181 selmon = m;
1182 focus(NULL);
1183 }
1184}
1185
1186Client *
1187nexttiled(Client *c) {
1188 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1189 return c;
1190}
1191
1192Monitor *
1193pointertomon(int x, int y) {
1194 Monitor *m;
1195
1196 for(m = mons; m; m = m->next)
1197 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1198 return m;
1199 return mons;
1200}
1201
1202void
1203propertynotify(XEvent *e) {
1204 Client *c;
1205 Window trans;
1206 XPropertyEvent *ev = &e->xproperty;
1207
1208 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1209 updatestatus();
1210 else if(ev->state == PropertyDelete)
1211 return; /* ignore */
1212 else if((c = wintoclient(ev->window))) {
1213 switch (ev->atom) {
1214 default: break;
1215 case XA_WM_TRANSIENT_FOR:
1216 XGetTransientForHint(dpy, c->win, &trans);
1217 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1218 arrange();
1219 break;
1220 case XA_WM_NORMAL_HINTS:
1221 updatesizehints(c);
1222 break;
1223 case XA_WM_HINTS:
1224 updatewmhints(c);
1225 drawbars();
1226 break;
1227 }
1228 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1229 updatetitle(c);
1230 if(c == selmon->sel)
1231 drawbars();
1232 }
1233 }
1234}
1235
1236void
1237quit(const Arg *arg) {
1238 running = False;
1239}
1240
1241void
1242resize(Client *c, int x, int y, int w, int h) {
1243 XWindowChanges wc;
1244
1245 if(applysizehints(c, &x, &y, &w, &h)) {
1246 c->x = wc.x = x;
1247 c->y = wc.y = y;
1248 c->w = wc.width = w;
1249 c->h = wc.height = h;
1250 wc.border_width = c->bw;
1251 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1252 configure(c);
1253 XSync(dpy, False);
1254 }
1255}
1256
1257void
1258resizemouse(const Arg *arg) {
1259 int ocx, ocy;
1260 int nw, nh;
1261 Client *c;
1262 Monitor *m;
1263 XEvent ev;
1264
1265 if(!(c = selmon->sel))
1266 return;
1267 restack(selmon);
1268 ocx = c->x;
1269 ocy = c->y;
1270 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1271 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1272 return;
1273 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1274 do {
1275 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1276 switch(ev.type) {
1277 case ConfigureRequest:
1278 case Expose:
1279 case MapRequest:
1280 handler[ev.type](&ev);
1281 break;
1282 case MotionNotify:
1283 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1284 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1285
1286 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1287 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1288 if(!c->isfloating && lt[selmon->sellt]->arrange
1289 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1290 togglefloating(NULL);
1291 }
1292 if(!lt[selmon->sellt]->arrange || c->isfloating)
1293 resize(c, c->x, c->y, nw, nh);
1294 break;
1295 }
1296 }
1297 while(ev.type != ButtonRelease);
1298 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1299 XUngrabPointer(dpy, CurrentTime);
1300 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1301 if((m = pointertomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1302 sendmon(c, m);
1303 selmon = m;
1304 focus(NULL);
1305 }
1306}
1307
1308void
1309restack(Monitor *m) {
1310 Client *c;
1311 XEvent ev;
1312 XWindowChanges wc;
1313
1314 drawbars();
1315 if(!m->sel)
1316 return;
1317 if(m->sel->isfloating || !lt[m->sellt]->arrange)
1318 XRaiseWindow(dpy, m->sel->win);
1319 if(lt[m->sellt]->arrange) {
1320 wc.stack_mode = Below;
1321 wc.sibling = m->barwin;
1322 for(c = m->stack; c; c = c->snext)
1323 if(!c->isfloating && ISVISIBLE(c)) {
1324 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1325 wc.sibling = c->win;
1326 }
1327 }
1328 XSync(dpy, False);
1329 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1330}
1331
1332void
1333run(void) {
1334 XEvent ev;
1335
1336 /* main event loop */
1337 XSync(dpy, False);
1338 while(running && !XNextEvent(dpy, &ev)) {
1339 if(handler[ev.type])
1340 (handler[ev.type])(&ev); /* call handler */
1341 }
1342}
1343
1344void
1345scan(void) {
1346 unsigned int i, num;
1347 Window d1, d2, *wins = NULL;
1348 XWindowAttributes wa;
1349
1350 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1351 for(i = 0; i < num; i++) {
1352 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1353 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1354 continue;
1355 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1356 manage(wins[i], &wa);
1357 }
1358 for(i = 0; i < num; i++) { /* now the transients */
1359 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1360 continue;
1361 if(XGetTransientForHint(dpy, wins[i], &d1)
1362 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1363 manage(wins[i], &wa);
1364 }
1365 if(wins)
1366 XFree(wins);
1367 }
1368}
1369
1370void
1371sendmon(Client *c, Monitor *m) {
1372 if(c->mon == m)
1373 return;
1374 detach(c);
1375 detachstack(c);
1376 c->mon = m;
1377 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1378 attach(c);
1379 attachstack(c);
1380 focus(NULL);
1381 arrange();
1382}
1383
1384void
1385setclientstate(Client *c, long state) {
1386 long data[] = {state, None};
1387
1388 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1389 PropModeReplace, (unsigned char *)data, 2);
1390}
1391
1392void
1393setlayout(const Arg *arg) {
1394 if(!arg || !arg->v || arg->v != lt[selmon->sellt])
1395 selmon->sellt ^= 1;
1396 if(arg && arg->v)
1397 lt[selmon->sellt] = (Layout *)arg->v;
1398 if(selmon->sel)
1399 arrange();
1400 else
1401 drawbars();
1402}
1403
1404/* arg > 1.0 will set mfact absolutly */
1405void
1406setmfact(const Arg *arg) {
1407 float f;
1408
1409 if(!arg || !lt[selmon->sellt]->arrange)
1410 return;
1411 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1412 if(f < 0.1 || f > 0.9)
1413 return;
1414 selmon->mfact = f;
1415 arrange();
1416}
1417
1418void
1419setup(void) {
1420 unsigned int i;
1421 int w;
1422 XSetWindowAttributes wa;
1423
1424 /* init screen */
1425 screen = DefaultScreen(dpy);
1426 root = RootWindow(dpy, screen);
1427 initfont(font);
1428 sx = 0;
1429 sy = 0;
1430 sw = DisplayWidth(dpy, screen);
1431 sh = DisplayHeight(dpy, screen);
1432 bh = dc.h = dc.font.height + 2;
1433 lt[0] = &layouts[0];
1434 lt[1] = &layouts[1 % LENGTH(layouts)];
1435 updategeom();
1436
1437 /* init atoms */
1438 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1439 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1440 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1441 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1442 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1443
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
1449 /* init appearance */
1450 dc.norm[ColBorder] = getcolor(normbordercolor);
1451 dc.norm[ColBG] = getcolor(normbgcolor);
1452 dc.norm[ColFG] = getcolor(normfgcolor);
1453 dc.sel[ColBorder] = getcolor(selbordercolor);
1454 dc.sel[ColBG] = getcolor(selbgcolor);
1455 dc.sel[ColFG] = getcolor(selfgcolor);
1456 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1457 dc.gc = XCreateGC(dpy, root, 0, NULL);
1458 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1459 if(!dc.font.set)
1460 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1461
1462 /* init bars */
1463 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1464 w = TEXTW(layouts[i].symbol);
1465 blw = MAX(blw, w);
1466 }
1467 updatebars();
1468 updatestatus();
1469
1470 /* EWMH support per view */
1471 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1472 PropModeReplace, (unsigned char *) netatom, NetLast);
1473
1474 /* select for events */
1475 wa.cursor = cursor[CurNormal];
1476 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1477 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1478 |PropertyChangeMask;
1479 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1480 XSelectInput(dpy, root, wa.event_mask);
1481
1482 grabkeys();
1483}
1484
1485void
1486showhide(Client *c) {
1487 if(!c)
1488 return;
1489 if(ISVISIBLE(c)) { /* show clients top down */
1490 XMoveWindow(dpy, c->win, c->x, c->y);
1491 if(!lt[c->mon->sellt]->arrange || c->isfloating)
1492 resize(c, c->x, c->y, c->w, c->h);
1493 showhide(c->snext);
1494 }
1495 else { /* hide clients bottom up */
1496 showhide(c->snext);
1497 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1498 }
1499}
1500
1501
1502void
1503sigchld(int signal) {
1504 while(0 < waitpid(-1, NULL, WNOHANG));
1505}
1506
1507void
1508spawn(const Arg *arg) {
1509 signal(SIGCHLD, sigchld);
1510 if(fork() == 0) {
1511 if(dpy)
1512 close(ConnectionNumber(dpy));
1513 setsid();
1514 execvp(((char **)arg->v)[0], (char **)arg->v);
1515 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1516 perror(" failed");
1517 exit(0);
1518 }
1519}
1520
1521void
1522tag(const Arg *arg) {
1523 if(selmon->sel && arg->ui & TAGMASK) {
1524 selmon->sel->tags = arg->ui & TAGMASK;
1525 arrange();
1526 }
1527}
1528
1529#ifdef XINERAMA
1530void
1531tagmon(const Arg *arg) {
1532 Monitor *m;
1533
1534 if(!selmon->sel || !(m = idxtomon(arg->ui)))
1535 return;
1536 sendmon(selmon->sel, m);
1537}
1538#endif /* XINERAMA */
1539
1540int
1541textnw(const char *text, unsigned int len) {
1542 XRectangle r;
1543
1544 if(dc.font.set) {
1545 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1546 return r.width;
1547 }
1548 return XTextWidth(dc.font.xfont, text, len);
1549}
1550
1551void
1552tile(Monitor *m) {
1553 int x, y, h, w, mw;
1554 unsigned int i, n;
1555 Client *c;
1556
1557 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1558 if(n == 0)
1559 return;
1560
1561 /* master */
1562 c = nexttiled(m->clients);
1563 mw = m->mfact * m->ww;
1564 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw);
1565
1566 if(--n == 0)
1567 return;
1568
1569 /* tile stack */
1570 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1571 y = m->wy;
1572 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1573 h = m->wh / n;
1574 if(h < bh)
1575 h = m->wh;
1576
1577 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1578 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1579 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw));
1580 if(h != m->wh)
1581 y = c->y + HEIGHT(c);
1582 }
1583}
1584
1585void
1586togglebar(const Arg *arg) {
1587 selmon->showbar = !selmon->showbar;
1588 updatebarpos(selmon);
1589 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1590 arrange();
1591}
1592
1593void
1594togglefloating(const Arg *arg) {
1595 if(!selmon->sel)
1596 return;
1597 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1598 if(selmon->sel->isfloating)
1599 resize(selmon->sel, selmon->sel->x, selmon->sel->y, selmon->sel->w, selmon->sel->h);
1600 arrange();
1601}
1602
1603void
1604toggletag(const Arg *arg) {
1605 unsigned int mask;
1606
1607 if(!selmon->sel)
1608 return;
1609
1610 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1611 if(mask) {
1612 selmon->sel->tags = mask;
1613 arrange();
1614 }
1615}
1616
1617void
1618toggleview(const Arg *arg) {
1619 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1620
1621 if(mask) {
1622 selmon->tagset[selmon->seltags] = mask;
1623 arrange();
1624 }
1625}
1626
1627void
1628unfocus(Client *c) {
1629 if(!c)
1630 return;
1631 grabbuttons(c, False);
1632 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1633 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1634}
1635
1636void
1637unmanage(Client *c) {
1638 XWindowChanges wc;
1639
1640 wc.border_width = c->oldbw;
1641 /* The server grab construct avoids race conditions. */
1642 XGrabServer(dpy);
1643 XSetErrorHandler(xerrordummy);
1644 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1645 detach(c);
1646 detachstack(c);
1647 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1648 setclientstate(c, WithdrawnState);
1649 free(c);
1650 XSync(dpy, False);
1651 XSetErrorHandler(xerror);
1652 XUngrabServer(dpy);
1653 focus(NULL);
1654 arrange();
1655}
1656
1657void
1658unmapnotify(XEvent *e) {
1659 Client *c;
1660 XUnmapEvent *ev = &e->xunmap;
1661
1662 if((c = wintoclient(ev->window)))
1663 unmanage(c);
1664}
1665
1666void
1667updatebars(void) {
1668 Monitor *m;
1669 XSetWindowAttributes wa;
1670
1671 wa.override_redirect = True;
1672 wa.background_pixmap = ParentRelative;
1673 wa.event_mask = ButtonPressMask|ExposureMask;
1674
1675 for(m = mons; m; m = m->next) {
1676 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1677
1678 CopyFromParent, DefaultVisual(dpy, screen),
1679 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1680 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1681 XMapRaised(dpy, m->barwin);
1682 }
1683}
1684
1685void
1686updatebarpos(Monitor *m) {
1687 m->wy = m->my;
1688 m->wh = m->mh;
1689 if(m->showbar) {
1690 m->wh -= bh;
1691 m->by = m->topbar ? m->wy : m->wy + m->wh;
1692 m->wy = m->topbar ? m->wy + bh : m->wy;
1693 }
1694 else
1695 m->by = -bh;
1696}
1697
1698void
1699updategeom(void) {
1700 int i, n = 1;
1701 Client *c;
1702 Monitor *newmons = NULL, *m, *tm;
1703
1704#ifdef XINERAMA
1705 XineramaScreenInfo *info = NULL;
1706
1707 if(XineramaIsActive(dpy))
1708 info = XineramaQueryScreens(dpy, &n);
1709#endif /* XINERAMA */
1710 /* allocate monitor(s) for the new geometry setup */
1711 for(i = 0; i < n; i++) {
1712 m = (Monitor *)malloc(sizeof(Monitor));
1713 m->next = newmons;
1714 newmons = m;
1715 }
1716
1717 /* initialise monitor(s) */
1718#ifdef XINERAMA
1719 if(XineramaIsActive(dpy)) {
1720 for(i = 0, m = newmons; m; m = m->next, i++) {
1721 m->screen_number = info[i].screen_number;
1722 m->mx = m->wx = info[i].x_org;
1723 m->my = m->wy = info[i].y_org;
1724 m->mw = m->ww = info[i].width;
1725 m->mh = m->wh = info[i].height;
1726 }
1727 XFree(info);
1728 }
1729 else
1730#endif /* XINERAMA */
1731 /* default monitor setup */
1732 {
1733 m->screen_number = 0;
1734 m->wx = sx;
1735 m->my = m->wy = sy;
1736 m->ww = sw;
1737 m->mh = m->wh = sh;
1738 }
1739
1740 /* bar geometry setup */
1741 for(m = newmons; m; m = m->next) {
1742 m->sel = m->stack = m->clients = NULL;
1743 m->seltags = 0;
1744 m->sellt = 0;
1745 m->tagset[0] = m->tagset[1] = 1;
1746 m->mfact = mfact;
1747 m->showbar = SHOWBAR;
1748 m->topbar = TOPBAR;
1749 updatebarpos(m);
1750 }
1751
1752 /* reassign left over clients of disappeared monitors */
1753 for(tm = mons; tm; tm = tm->next)
1754 while(tm->clients) {
1755 c = tm->clients;
1756 tm->clients = c->next;
1757 detachstack(c);
1758 c->mon = newmons;
1759 attach(c);
1760 attachstack(c);
1761 }
1762
1763 /* select focused monitor */
1764 cleanupmons();
1765 mons = newmons;
1766 selmon = wintomon(root);
1767}
1768
1769void
1770updatenumlockmask(void) {
1771 unsigned int i, j;
1772 XModifierKeymap *modmap;
1773
1774 numlockmask = 0;
1775 modmap = XGetModifierMapping(dpy);
1776 for(i = 0; i < 8; i++)
1777 for(j = 0; j < modmap->max_keypermod; j++)
1778 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1779 == XKeysymToKeycode(dpy, XK_Num_Lock))
1780 numlockmask = (1 << i);
1781 XFreeModifiermap(modmap);
1782}
1783
1784void
1785updatesizehints(Client *c) {
1786 long msize;
1787 XSizeHints size;
1788
1789 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1790 /* size is uninitialized, ensure that size.flags aren't used */
1791 size.flags = PSize;
1792 if(size.flags & PBaseSize) {
1793 c->basew = size.base_width;
1794 c->baseh = size.base_height;
1795 }
1796 else if(size.flags & PMinSize) {
1797 c->basew = size.min_width;
1798 c->baseh = size.min_height;
1799 }
1800 else
1801 c->basew = c->baseh = 0;
1802 if(size.flags & PResizeInc) {
1803 c->incw = size.width_inc;
1804 c->inch = size.height_inc;
1805 }
1806 else
1807 c->incw = c->inch = 0;
1808 if(size.flags & PMaxSize) {
1809 c->maxw = size.max_width;
1810 c->maxh = size.max_height;
1811 }
1812 else
1813 c->maxw = c->maxh = 0;
1814 if(size.flags & PMinSize) {
1815 c->minw = size.min_width;
1816 c->minh = size.min_height;
1817 }
1818 else if(size.flags & PBaseSize) {
1819 c->minw = size.base_width;
1820 c->minh = size.base_height;
1821 }
1822 else
1823 c->minw = c->minh = 0;
1824 if(size.flags & PAspect) {
1825 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1826 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1827 }
1828 else
1829 c->maxa = c->mina = 0.0;
1830 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1831 && c->maxw == c->minw && c->maxh == c->minh);
1832}
1833
1834void
1835updatetitle(Client *c) {
1836 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1837 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1838}
1839
1840void
1841updatestatus(void) {
1842 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1843 strcpy(stext, "dwm-"VERSION);
1844 drawbar(selmon);
1845}
1846
1847void
1848updatewmhints(Client *c) {
1849 XWMHints *wmh;
1850
1851 if((wmh = XGetWMHints(dpy, c->win))) {
1852 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1853 wmh->flags &= ~XUrgencyHint;
1854 XSetWMHints(dpy, c->win, wmh);
1855 }
1856 else
1857 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1858
1859 XFree(wmh);
1860 }
1861}
1862
1863void
1864view(const Arg *arg) {
1865 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1866 return;
1867 selmon->seltags ^= 1; /* toggle sel tagset */
1868 if(arg->ui & TAGMASK)
1869 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1870 arrange();
1871}
1872
1873Client *
1874wintoclient(Window w) {
1875 Client *c;
1876 Monitor *m;
1877
1878 for(m = mons; m; m = m->next)
1879 for(c = m->clients; c; c = c->next)
1880 if(c->win == w)
1881 return c;
1882 return NULL;
1883}
1884
1885Monitor *
1886wintomon(Window w) {
1887 int x, y;
1888 Client *c;
1889 Monitor *m;
1890
1891 if(w == root && getrootpointer(&x, &y))
1892 return pointertomon(x, y);
1893 for(m = mons; m; m = m->next)
1894 if(w == m->barwin)
1895 return m;
1896 if((c = wintoclient(w)))
1897 return c->mon;
1898 return mons;
1899}
1900
1901/* There's no way to check accesses to destroyed windows, thus those cases are
1902 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1903 * default error handler, which may call exit. */
1904int
1905xerror(Display *dpy, XErrorEvent *ee) {
1906 if(ee->error_code == BadWindow
1907 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1908 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1909 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1910 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1911 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1912 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1913 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1914 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1915 return 0;
1916 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1917 ee->request_code, ee->error_code);
1918 return xerrorxlib(dpy, ee); /* may call exit */
1919}
1920
1921int
1922xerrordummy(Display *dpy, XErrorEvent *ee) {
1923 return 0;
1924}
1925
1926/* Startup Error handler to check if another window manager
1927 * is already running. */
1928int
1929xerrorstart(Display *dpy, XErrorEvent *ee) {
1930 otherwm = True;
1931 return -1;
1932}
1933
1934void
1935zoom(const Arg *arg) {
1936 Client *c = selmon->sel;
1937
1938 if(!lt[selmon->sellt]->arrange || lt[selmon->sellt]->arrange == monocle || (selmon->sel && selmon->sel->isfloating))
1939 return;
1940 if(c == nexttiled(selmon->clients))
1941 if(!c || !(c = nexttiled(c->next)))
1942 return;
1943 detach(c);
1944 attach(c);
1945 focus(c);
1946 arrange();
1947}
1948
1949int
1950main(int argc, char *argv[]) {
1951 if(argc == 2 && !strcmp("-v", argv[1]))
1952 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1953 else if(argc != 1)
1954 die("usage: dwm [-v]\n");
1955
1956 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1957 fputs("warning: no locale support\n", stderr);
1958
1959 if(!(dpy = XOpenDisplay(NULL)))
1960 die("dwm: cannot open display\n");
1961
1962 checkotherwm();
1963 setup();
1964 scan();
1965 run();
1966 cleanup();
1967
1968 XCloseDisplay(dpy);
1969 return 0;
1970}