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