dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23#include <errno.h>
24#include <locale.h>
25#include <stdarg.h>
26#include <signal.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <unistd.h>
31#include <sys/types.h>
32#include <sys/wait.h>
33#include <X11/cursorfont.h>
34#include <X11/keysym.h>
35#include <X11/Xatom.h>
36#include <X11/Xlib.h>
37#include <X11/Xproto.h>
38#include <X11/Xutil.h>
39#ifdef XINERAMA
40#include <X11/extensions/Xinerama.h>
41#endif /* XINERAMA */
42
43/* macros */
44#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46#define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47#define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
48#define LENGTH(X) (sizeof X / sizeof X[0])
49#define MAX(A, B) ((A) > (B) ? (A) : (B))
50#define MIN(A, B) ((A) < (B) ? (A) : (B))
51#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
52#define WIDTH(X) ((X)->w + 2 * (X)->bw)
53#define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54#define TAGMASK ((1 << LENGTH(tags)) - 1)
55#define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57/* enums */
58enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 const void *v;
70} Arg;
71
72typedef struct {
73 unsigned int click;
74 unsigned int mask;
75 unsigned int button;
76 void (*func)(const Arg *arg);
77 const Arg arg;
78} Button;
79
80typedef struct Monitor Monitor;
81typedef struct Client Client;
82struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Monitor *mon;
93 Window win;
94};
95
96typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109} DC; /* draw context */
110
111typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116} Key;
117
118typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121} Layout;
122
123struct Monitor {
124 float mfact;
125 int num;
126 int by; /* bar geometry */
127 int mx, my, mw, mh; /* screen size */
128 int wx, wy, ww, wh; /* window area */
129 unsigned int seltags;
130 unsigned int sellt;
131 unsigned int tagset[2];
132 Bool showbar;
133 Bool topbar;
134 Client *clients;
135 Client *sel;
136 Client *stack;
137 Monitor *next;
138 Window barwin;
139 const Layout *lt[2];
140};
141
142typedef struct {
143 const char *class;
144 const char *instance;
145 const char *title;
146 unsigned int tags;
147 Bool isfloating;
148 int monitor;
149} Rule;
150
151/* function declarations */
152static void applyrules(Client *c);
153static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
154static void arrange(void);
155static void attach(Client *c);
156static void attachstack(Client *c);
157static void buttonpress(XEvent *e);
158static void checkotherwm(void);
159static void cleanup(void);
160static void cleanupmons(void);
161static void clearurgent(Client *c);
162static void configure(Client *c);
163static void configurenotify(XEvent *e);
164static void configurerequest(XEvent *e);
165static void destroynotify(XEvent *e);
166static void detach(Client *c);
167static void detachstack(Client *c);
168static void die(const char *errstr, ...);
169static Monitor *dirtomon(int dir);
170static void drawbar(Monitor *m);
171static void drawbars(void);
172static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
173static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
174static void enternotify(XEvent *e);
175static void expose(XEvent *e);
176static void focus(Client *c);
177static void focusin(XEvent *e);
178static void focusmon(const Arg *arg);
179static void focusstack(const Arg *arg);
180static unsigned long getcolor(const char *colstr);
181static Bool getrootptr(int *x, int *y);
182static long getstate(Window w);
183static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
184static void grabbuttons(Client *c, Bool focused);
185static void grabkeys(void);
186static void initfont(const char *fontstr);
187static Bool isprotodel(Client *c);
188static void keypress(XEvent *e);
189static void killclient(const Arg *arg);
190static void manage(Window w, XWindowAttributes *wa);
191static void mappingnotify(XEvent *e);
192static void maprequest(XEvent *e);
193static void monocle(Monitor *m);
194static void movemouse(const Arg *arg);
195static Client *nexttiled(Client *c);
196static Monitor *ptrtomon(int x, int y);
197static void propertynotify(XEvent *e);
198static void quit(const Arg *arg);
199static void resize(Client *c, int x, int y, int w, int h, Bool interact);
200static void resizemouse(const Arg *arg);
201static void restack(Monitor *m);
202static void run(void);
203static void scan(void);
204static void sendmon(Client *c, Monitor *m);
205static void setclientstate(Client *c, long state);
206static void setlayout(const Arg *arg);
207static void setmfact(const Arg *arg);
208static void setup(void);
209static void showhide(Client *c);
210static void sigchld(int unused);
211static void spawn(const Arg *arg);
212static void tag(const Arg *arg);
213static void tagmon(const Arg *arg);
214static int textnw(const char *text, unsigned int len);
215static void tile(Monitor *);
216static void togglebar(const Arg *arg);
217static void togglefloating(const Arg *arg);
218static void toggletag(const Arg *arg);
219static void toggleview(const Arg *arg);
220static void unfocus(Client *c);
221static void unmanage(Client *c, Bool destroyed);
222static void unmapnotify(XEvent *e);
223static void updategeom(void);
224static void updatebarpos(Monitor *m);
225static void updatebars(void);
226static void updatenumlockmask(void);
227static void updatesizehints(Client *c);
228static void updatestatus(void);
229static void updatetitle(Client *c);
230static void updatewmhints(Client *c);
231static void view(const Arg *arg);
232static Client *wintoclient(Window w);
233static Monitor *wintomon(Window w);
234static int xerror(Display *dpy, XErrorEvent *ee);
235static int xerrordummy(Display *dpy, XErrorEvent *ee);
236static int xerrorstart(Display *dpy, XErrorEvent *ee);
237static void zoom(const Arg *arg);
238
239/* variables */
240static const char broken[] = "broken";
241static char stext[256], ntext[8];
242static int screen;
243static int sw, sh; /* X display screen geometry width, height */
244static int bh, blw = 0; /* bar geometry */
245static int (*xerrorxlib)(Display *, XErrorEvent *);
246static unsigned int numlockmask = 0;
247static void (*handler[LASTEvent]) (XEvent *) = {
248 [ButtonPress] = buttonpress,
249 [ConfigureRequest] = configurerequest,
250 [ConfigureNotify] = configurenotify,
251 [DestroyNotify] = destroynotify,
252 [EnterNotify] = enternotify,
253 [Expose] = expose,
254 [FocusIn] = focusin,
255 [KeyPress] = keypress,
256 [MappingNotify] = mappingnotify,
257 [MapRequest] = maprequest,
258 [PropertyNotify] = propertynotify,
259 [UnmapNotify] = unmapnotify
260};
261static Atom wmatom[WMLast], netatom[NetLast];
262static Bool otherwm;
263static Bool running = True;
264static Cursor cursor[CurLast];
265static Display *dpy;
266static DC dc;
267static Monitor *mons = NULL, *selmon = NULL;
268static Window root;
269
270/* configuration, allows nested code to access above variables */
271#include "config.h"
272
273/* compile-time check if all tags fit into an unsigned int bit array. */
274struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
275
276/* function implementations */
277void
278applyrules(Client *c) {
279 const char *class, *instance;
280 unsigned int i;
281 const Rule *r;
282 Monitor *m;
283 XClassHint ch = { 0 };
284
285 /* rule matching */
286 c->isfloating = c->tags = 0;
287 if(XGetClassHint(dpy, c->win, &ch)) {
288 class = ch.res_class ? ch.res_class : broken;
289 instance = ch.res_name ? ch.res_name : broken;
290 for(i = 0; i < LENGTH(rules); i++) {
291 r = &rules[i];
292 if((!r->title || strstr(c->name, r->title))
293 && (!r->class || strstr(class, r->class))
294 && (!r->instance || strstr(instance, r->instance)))
295 {
296 c->isfloating = r->isfloating;
297 c->tags |= r->tags;
298 for(m = mons; m && m->num != r->monitor; m = m->next);
299 if(m)
300 c->mon = m;
301 }
302 }
303 if(ch.res_class)
304 XFree(ch.res_class);
305 if(ch.res_name)
306 XFree(ch.res_name);
307 }
308 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
309}
310
311Bool
312applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
313 Bool baseismin;
314 Monitor *m = c->mon;
315
316 /* set minimum possible */
317 *w = MAX(1, *w);
318 *h = MAX(1, *h);
319 if(interact) {
320 if(*x > sw)
321 *x = sw - WIDTH(c);
322 if(*y > sh)
323 *y = sh - HEIGHT(c);
324 if(*x + *w + 2 * c->bw < 0)
325 *x = 0;
326 if(*y + *h + 2 * c->bw < 0)
327 *y = 0;
328 }
329 else {
330 if(*x > m->mx + m->mw)
331 *x = m->mx + m->mw - WIDTH(c);
332 if(*y > m->my + m->mh)
333 *y = m->my + m->mh - HEIGHT(c);
334 if(*x + *w + 2 * c->bw < m->mx)
335 *x = m->mx;
336 if(*y + *h + 2 * c->bw < m->my)
337 *y = m->my;
338 }
339 if(*h < bh)
340 *h = bh;
341 if(*w < bh)
342 *w = bh;
343 if(resizehints || c->isfloating) {
344 /* see last two sentences in ICCCM 4.1.2.3 */
345 baseismin = c->basew == c->minw && c->baseh == c->minh;
346 if(!baseismin) { /* temporarily remove base dimensions */
347 *w -= c->basew;
348 *h -= c->baseh;
349 }
350 /* adjust for aspect limits */
351 if(c->mina > 0 && c->maxa > 0) {
352 if(c->maxa < (float)*w / *h)
353 *w = *h * c->maxa + 0.5;
354 else if(c->mina < (float)*h / *w)
355 *h = *w * c->mina + 0.5;
356 }
357 if(baseismin) { /* increment calculation requires this */
358 *w -= c->basew;
359 *h -= c->baseh;
360 }
361 /* adjust for increment value */
362 if(c->incw)
363 *w -= *w % c->incw;
364 if(c->inch)
365 *h -= *h % c->inch;
366 /* restore base dimensions */
367 *w += c->basew;
368 *h += c->baseh;
369 *w = MAX(*w, c->minw);
370 *h = MAX(*h, c->minh);
371 if(c->maxw)
372 *w = MIN(*w, c->maxw);
373 if(c->maxh)
374 *h = MIN(*h, c->maxh);
375 }
376 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
377}
378
379void
380arrange(void) {
381 Monitor *m;
382
383 for(m = mons; m; m = m->next)
384 showhide(m->stack);
385 focus(NULL);
386 for(m = mons; m; m = m->next) {
387 if(m->lt[m->sellt]->arrange)
388 m->lt[m->sellt]->arrange(m);
389 restack(m);
390 }
391}
392
393void
394attach(Client *c) {
395 c->next = c->mon->clients;
396 c->mon->clients = c;
397}
398
399void
400attachstack(Client *c) {
401 c->snext = c->mon->stack;
402 c->mon->stack = c;
403}
404
405void
406buttonpress(XEvent *e) {
407 unsigned int i, x, click;
408 Arg arg = {0};
409 Client *c;
410 Monitor *m;
411 XButtonPressedEvent *ev = &e->xbutton;
412
413 click = ClkRootWin;
414 /* focus monitor if necessary */
415 if((m = wintomon(ev->window)) && m != selmon) {
416 unfocus(selmon->sel);
417 selmon = m;
418 focus(NULL);
419 }
420 if(ev->window == selmon->barwin) {
421 i = x = 0;
422 do {
423 x += TEXTW(tags[i]);
424 } while(ev->x >= x && ++i < LENGTH(tags));
425 if(i < LENGTH(tags)) {
426 click = ClkTagBar;
427 arg.ui = 1 << i;
428 }
429 else if(ev->x < x + blw)
430 click = ClkLtSymbol;
431 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
432 click = ClkStatusText;
433 else
434 click = ClkWinTitle;
435 }
436 else if((c = wintoclient(ev->window))) {
437 focus(c);
438 click = ClkClientWin;
439 }
440 for(i = 0; i < LENGTH(buttons); i++)
441 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
442 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
443 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
444}
445
446void
447checkotherwm(void) {
448 otherwm = False;
449 xerrorxlib = XSetErrorHandler(xerrorstart);
450 /* this causes an error if some other window manager is running */
451 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
452 XSync(dpy, False);
453 if(otherwm)
454 die("dwm: another window manager is already running\n");
455 XSetErrorHandler(xerror);
456 XSync(dpy, False);
457}
458
459void
460cleanup(void) {
461 Arg a = {.ui = ~0};
462 Layout foo = { "", NULL };
463 Monitor *m;
464
465 view(&a);
466 selmon->lt[selmon->sellt] = &foo;
467 for(m = mons; m; m = m->next)
468 while(m->stack)
469 unmanage(m->stack, False);
470 if(dc.font.set)
471 XFreeFontSet(dpy, dc.font.set);
472 else
473 XFreeFont(dpy, dc.font.xfont);
474 XUngrabKey(dpy, AnyKey, AnyModifier, root);
475 XFreePixmap(dpy, dc.drawable);
476 XFreeGC(dpy, dc.gc);
477 XFreeCursor(dpy, cursor[CurNormal]);
478 XFreeCursor(dpy, cursor[CurResize]);
479 XFreeCursor(dpy, cursor[CurMove]);
480 cleanupmons();
481 XSync(dpy, False);
482 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
483}
484
485void
486cleanupmons(void) {
487 Monitor *m;
488
489 while(mons) {
490 m = mons->next;
491 XUnmapWindow(dpy, mons->barwin);
492 XDestroyWindow(dpy, mons->barwin);
493 free(mons);
494 mons = m;
495 }
496}
497
498void
499clearurgent(Client *c) {
500 XWMHints *wmh;
501
502 c->isurgent = False;
503 if(!(wmh = XGetWMHints(dpy, c->win)))
504 return;
505 wmh->flags &= ~XUrgencyHint;
506 XSetWMHints(dpy, c->win, wmh);
507 XFree(wmh);
508}
509
510void
511configure(Client *c) {
512 XConfigureEvent ce;
513
514 ce.type = ConfigureNotify;
515 ce.display = dpy;
516 ce.event = c->win;
517 ce.window = c->win;
518 ce.x = c->x;
519 ce.y = c->y;
520 ce.width = c->w;
521 ce.height = c->h;
522 ce.border_width = c->bw;
523 ce.above = None;
524 ce.override_redirect = False;
525 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
526}
527
528void
529configurenotify(XEvent *e) {
530 Monitor *m;
531 XConfigureEvent *ev = &e->xconfigure;
532
533 if(ev->window == root) {
534 sw = ev->width;
535 sh = ev->height;
536 updategeom();
537 if(dc.drawable != 0)
538 XFreePixmap(dpy, dc.drawable);
539 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
540 updatebars();
541 for(m = mons; m; m = m->next)
542 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
543 arrange();
544 }
545}
546
547void
548configurerequest(XEvent *e) {
549 Client *c;
550 Monitor *m;
551 XConfigureRequestEvent *ev = &e->xconfigurerequest;
552 XWindowChanges wc;
553
554 if((c = wintoclient(ev->window))) {
555 if(ev->value_mask & CWBorderWidth)
556 c->bw = ev->border_width;
557 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
558 m = c->mon;
559 if(ev->value_mask & CWX)
560 c->x = m->mx + ev->x;
561 if(ev->value_mask & CWY)
562 c->y = m->my + ev->y;
563 if(ev->value_mask & CWWidth)
564 c->w = ev->width;
565 if(ev->value_mask & CWHeight)
566 c->h = ev->height;
567 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
568 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
569 if((c->y + c->h) > m->my + m->mh && c->isfloating)
570 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
571 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
572 configure(c);
573 if(ISVISIBLE(c))
574 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
575 }
576 else
577 configure(c);
578 }
579 else {
580 wc.x = ev->x;
581 wc.y = ev->y;
582 wc.width = ev->width;
583 wc.height = ev->height;
584 wc.border_width = ev->border_width;
585 wc.sibling = ev->above;
586 wc.stack_mode = ev->detail;
587 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
588 }
589 XSync(dpy, False);
590}
591
592void
593destroynotify(XEvent *e) {
594 Client *c;
595 XDestroyWindowEvent *ev = &e->xdestroywindow;
596
597 if((c = wintoclient(ev->window)))
598 unmanage(c, True);
599}
600
601void
602detach(Client *c) {
603 Client **tc;
604
605 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
606 *tc = c->next;
607}
608
609void
610detachstack(Client *c) {
611 Client **tc, *t;
612
613 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
614 *tc = c->snext;
615
616 if(c == c->mon->sel) {
617 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
618 c->mon->sel = t;
619 }
620}
621
622void
623die(const char *errstr, ...) {
624 va_list ap;
625
626 va_start(ap, errstr);
627 vfprintf(stderr, errstr, ap);
628 va_end(ap);
629 exit(EXIT_FAILURE);
630}
631
632Monitor *
633dirtomon(int dir) {
634 Monitor *m = NULL;
635
636 if(dir > 0) {
637 if(!(m = selmon->next))
638 m = mons;
639 }
640 else {
641 if(selmon == mons)
642 for(m = mons; m->next; m = m->next);
643 else
644 for(m = mons; m->next != selmon; m = m->next);
645 }
646 return m;
647}
648
649void
650drawbar(Monitor *m) {
651 int x;
652 unsigned int i, n = 0, occ = 0, urg = 0;
653 unsigned long *col;
654 Client *c;
655
656 for(c = m->clients; c; c = c->next) {
657 if(ISVISIBLE(c))
658 n++;
659 occ |= c->tags;
660 if(c->isurgent)
661 urg |= c->tags;
662 }
663 dc.x = 0;
664 for(i = 0; i < LENGTH(tags); i++) {
665 dc.w = TEXTW(tags[i]);
666 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
667 drawtext(tags[i], col, urg & 1 << i);
668 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
669 occ & 1 << i, urg & 1 << i, col);
670 dc.x += dc.w;
671 }
672 if(blw > 0) {
673 dc.w = blw;
674 drawtext(m->lt[m->sellt]->symbol, dc.norm, False);
675 dc.x += dc.w;
676 }
677 snprintf(ntext, sizeof ntext, "%u", n);
678 dc.w = TEXTW(ntext);
679 drawtext(ntext, dc.norm, False);
680 x = (dc.x += dc.w);
681 if(m == selmon) { /* status is only drawn on selected monitor */
682 dc.w = TEXTW(stext);
683 dc.x = m->ww - dc.w;
684 if(dc.x < x) {
685 dc.x = x;
686 dc.w = m->ww - x;
687 }
688 drawtext(stext, dc.norm, False);
689 }
690 else
691 dc.x = m->ww;
692 if((dc.w = dc.x - x) > bh) {
693 dc.x = x;
694 if(m->sel) {
695 col = m == selmon ? dc.sel : dc.norm;
696 drawtext(m->sel->name, col, False);
697 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
698 }
699 else
700 drawtext(NULL, dc.norm, False);
701 }
702 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
703 XSync(dpy, False);
704}
705
706void
707drawbars(void) {
708 Monitor *m;
709
710 for(m = mons; m; m = m->next)
711 drawbar(m);
712}
713
714void
715drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
716 int x;
717 XGCValues gcv;
718 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
719
720 gcv.foreground = col[invert ? ColBG : ColFG];
721 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
722 x = (dc.font.ascent + dc.font.descent + 2) / 4;
723 r.x = dc.x + 1;
724 r.y = dc.y + 1;
725 if(filled) {
726 r.width = r.height = x + 1;
727 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
728 }
729 else if(empty) {
730 r.width = r.height = x;
731 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
732 }
733}
734
735void
736drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
737 char buf[256];
738 int i, x, y, h, len, olen;
739 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
740
741 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
742 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
743 if(!text)
744 return;
745 olen = strlen(text);
746 h = dc.font.ascent + dc.font.descent;
747 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
748 x = dc.x + (h / 2);
749 /* shorten text if necessary */
750 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
751 if(!len)
752 return;
753 memcpy(buf, text, len);
754 if(len < olen)
755 for(i = len; i && i > len - 3; buf[--i] = '.');
756 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
757 if(dc.font.set)
758 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
759 else
760 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
761}
762
763void
764enternotify(XEvent *e) {
765 Client *c;
766 Monitor *m;
767 XCrossingEvent *ev = &e->xcrossing;
768
769 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
770 return;
771 if((m = wintomon(ev->window)) && m != selmon) {
772 unfocus(selmon->sel);
773 selmon = m;
774 }
775 if((c = wintoclient(ev->window)))
776 focus(c);
777 else
778 focus(NULL);
779}
780
781void
782expose(XEvent *e) {
783 Monitor *m;
784 XExposeEvent *ev = &e->xexpose;
785
786 if(ev->count == 0 && (m = wintomon(ev->window)))
787 drawbar(m);
788}
789
790void
791focus(Client *c) {
792 if(!c || !ISVISIBLE(c))
793 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
794 if(selmon->sel)
795 unfocus(selmon->sel);
796 if(c) {
797 if(c->mon != selmon)
798 selmon = c->mon;
799 if(c->isurgent)
800 clearurgent(c);
801 detachstack(c);
802 attachstack(c);
803 grabbuttons(c, True);
804 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
805 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
806 }
807 else
808 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
809 selmon->sel = c;
810 drawbars();
811}
812
813void
814focusin(XEvent *e) { /* there are some broken focus acquiring clients */
815 XFocusChangeEvent *ev = &e->xfocus;
816
817 if(selmon->sel && ev->window != selmon->sel->win)
818 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
819}
820
821void
822focusmon(const Arg *arg) {
823 Monitor *m = NULL;
824
825 if(!mons->next)
826 return;
827 m = dirtomon(arg->i);
828 unfocus(selmon->sel);
829 selmon = m;
830 focus(NULL);
831}
832
833void
834focusstack(const Arg *arg) {
835 Client *c = NULL, *i;
836
837 if(!selmon->sel)
838 return;
839 if(arg->i > 0) {
840 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
841 if(!c)
842 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
843 }
844 else {
845 for(i = selmon->clients; i != selmon->sel; i = i->next)
846 if(ISVISIBLE(i))
847 c = i;
848 if(!c)
849 for(; i; i = i->next)
850 if(ISVISIBLE(i))
851 c = i;
852 }
853 if(c) {
854 focus(c);
855 restack(selmon);
856 }
857}
858
859unsigned long
860getcolor(const char *colstr) {
861 Colormap cmap = DefaultColormap(dpy, screen);
862 XColor color;
863
864 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
865 die("error, cannot allocate color '%s'\n", colstr);
866 return color.pixel;
867}
868
869Bool
870getrootptr(int *x, int *y) {
871 int di;
872 unsigned int dui;
873 Window dummy;
874
875 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
876}
877
878long
879getstate(Window w) {
880 int format, status;
881 long result = -1;
882 unsigned char *p = NULL;
883 unsigned long n, extra;
884 Atom real;
885
886 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
887 &real, &format, &n, &extra, (unsigned char **)&p);
888 if(status != Success)
889 return -1;
890 if(n != 0)
891 result = *p;
892 XFree(p);
893 return result;
894}
895
896Bool
897gettextprop(Window w, Atom atom, char *text, unsigned int size) {
898 char **list = NULL;
899 int n;
900 XTextProperty name;
901
902 if(!text || size == 0)
903 return False;
904 text[0] = '\0';
905 XGetTextProperty(dpy, w, &name, atom);
906 if(!name.nitems)
907 return False;
908 if(name.encoding == XA_STRING)
909 strncpy(text, (char *)name.value, size - 1);
910 else {
911 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
912 strncpy(text, *list, size - 1);
913 XFreeStringList(list);
914 }
915 }
916 text[size - 1] = '\0';
917 XFree(name.value);
918 return True;
919}
920
921void
922grabbuttons(Client *c, Bool focused) {
923 updatenumlockmask();
924 {
925 unsigned int i, j;
926 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
927 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
928 if(focused) {
929 for(i = 0; i < LENGTH(buttons); i++)
930 if(buttons[i].click == ClkClientWin)
931 for(j = 0; j < LENGTH(modifiers); j++)
932 XGrabButton(dpy, buttons[i].button,
933 buttons[i].mask | modifiers[j],
934 c->win, False, BUTTONMASK,
935 GrabModeAsync, GrabModeSync, None, None);
936 }
937 else
938 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
939 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
940 }
941}
942
943void
944grabkeys(void) {
945 updatenumlockmask();
946 {
947 unsigned int i, j;
948 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
949 KeyCode code;
950
951 XUngrabKey(dpy, AnyKey, AnyModifier, root);
952 for(i = 0; i < LENGTH(keys); i++) {
953 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
954 for(j = 0; j < LENGTH(modifiers); j++)
955 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
956 True, GrabModeAsync, GrabModeAsync);
957 }
958 }
959}
960
961void
962initfont(const char *fontstr) {
963 char *def, **missing;
964 int i, n;
965
966 missing = NULL;
967 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
968 if(missing) {
969 while(n--)
970 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
971 XFreeStringList(missing);
972 }
973 if(dc.font.set) {
974 XFontSetExtents *font_extents;
975 XFontStruct **xfonts;
976 char **font_names;
977
978 dc.font.ascent = dc.font.descent = 0;
979 font_extents = XExtentsOfFontSet(dc.font.set);
980 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
981 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
982 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
983 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
984 xfonts++;
985 }
986 }
987 else {
988 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
989 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
990 die("error, cannot load font: '%s'\n", fontstr);
991 dc.font.ascent = dc.font.xfont->ascent;
992 dc.font.descent = dc.font.xfont->descent;
993 }
994 dc.font.height = dc.font.ascent + dc.font.descent;
995}
996
997Bool
998isprotodel(Client *c) {
999 int i, n;
1000 Atom *protocols;
1001 Bool ret = False;
1002
1003 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1004 for(i = 0; !ret && i < n; i++)
1005 if(protocols[i] == wmatom[WMDelete])
1006 ret = True;
1007 XFree(protocols);
1008 }
1009 return ret;
1010}
1011
1012void
1013keypress(XEvent *e) {
1014 unsigned int i;
1015 KeySym keysym;
1016 XKeyEvent *ev;
1017
1018 ev = &e->xkey;
1019 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1020 for(i = 0; i < LENGTH(keys); i++)
1021 if(keysym == keys[i].keysym
1022 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1023 && keys[i].func)
1024 keys[i].func(&(keys[i].arg));
1025}
1026
1027void
1028killclient(const Arg *arg) {
1029 XEvent ev;
1030
1031 if(!selmon->sel)
1032 return;
1033 if(isprotodel(selmon->sel)) {
1034 ev.type = ClientMessage;
1035 ev.xclient.window = selmon->sel->win;
1036 ev.xclient.message_type = wmatom[WMProtocols];
1037 ev.xclient.format = 32;
1038 ev.xclient.data.l[0] = wmatom[WMDelete];
1039 ev.xclient.data.l[1] = CurrentTime;
1040 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1041 }
1042 else {
1043 XGrabServer(dpy);
1044 XSetErrorHandler(xerrordummy);
1045 XSetCloseDownMode(dpy, DestroyAll);
1046 XKillClient(dpy, selmon->sel->win);
1047 XSync(dpy, False);
1048 XSetErrorHandler(xerror);
1049 XUngrabServer(dpy);
1050 }
1051}
1052
1053void
1054manage(Window w, XWindowAttributes *wa) {
1055 static Client cz;
1056 Client *c, *t = NULL;
1057 Window trans = None;
1058 XWindowChanges wc;
1059
1060 if(!(c = malloc(sizeof(Client))))
1061 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1062 *c = cz;
1063 c->win = w;
1064 updatetitle(c);
1065 if(XGetTransientForHint(dpy, w, &trans))
1066 t = wintoclient(trans);
1067 if(t) {
1068 c->mon = t->mon;
1069 c->tags = t->tags;
1070 }
1071 else {
1072 c->mon = selmon;
1073 applyrules(c);
1074 }
1075 /* geometry */
1076 c->x = wa->x + c->mon->wx;
1077 c->y = wa->y + c->mon->wy;
1078 c->w = wa->width;
1079 c->h = wa->height;
1080 c->oldbw = wa->border_width;
1081 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1082 c->x = c->mon->mx;
1083 c->y = c->mon->my;
1084 c->bw = 0;
1085 }
1086 else {
1087 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1088 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1089 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1090 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1091 c->x = MAX(c->x, c->mon->mx);
1092 /* only fix client y-offset, if the client center might cover the bar */
1093 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1094 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1095 c->bw = borderpx;
1096 }
1097 wc.border_width = c->bw;
1098 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1099 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1100 configure(c); /* propagates border_width, if size doesn't change */
1101 updatesizehints(c);
1102 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1103 grabbuttons(c, False);
1104 if(!c->isfloating)
1105 c->isfloating = trans != None || c->isfixed;
1106 if(c->isfloating)
1107 XRaiseWindow(dpy, c->win);
1108 attach(c);
1109 attachstack(c);
1110 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1111 XMapWindow(dpy, c->win);
1112 setclientstate(c, NormalState);
1113 arrange();
1114}
1115
1116void
1117mappingnotify(XEvent *e) {
1118 XMappingEvent *ev = &e->xmapping;
1119
1120 XRefreshKeyboardMapping(ev);
1121 if(ev->request == MappingKeyboard)
1122 grabkeys();
1123}
1124
1125void
1126maprequest(XEvent *e) {
1127 static XWindowAttributes wa;
1128 XMapRequestEvent *ev = &e->xmaprequest;
1129
1130 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1131 return;
1132 if(wa.override_redirect)
1133 return;
1134 if(!wintoclient(ev->window))
1135 manage(ev->window, &wa);
1136}
1137
1138void
1139monocle(Monitor *m) {
1140 Client *c;
1141
1142 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1143 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1144}
1145
1146void
1147movemouse(const Arg *arg) {
1148 int x, y, ocx, ocy, nx, ny;
1149 Client *c;
1150 Monitor *m;
1151 XEvent ev;
1152
1153 if(!(c = selmon->sel))
1154 return;
1155 restack(selmon);
1156 ocx = c->x;
1157 ocy = c->y;
1158 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1159 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1160 return;
1161 if(!getrootptr(&x, &y))
1162 return;
1163 do {
1164 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1165 switch (ev.type) {
1166 case ConfigureRequest:
1167 case Expose:
1168 case MapRequest:
1169 handler[ev.type](&ev);
1170 break;
1171 case MotionNotify:
1172 nx = ocx + (ev.xmotion.x - x);
1173 ny = ocy + (ev.xmotion.y - y);
1174 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1175 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1176 if(abs(selmon->wx - nx) < snap)
1177 nx = selmon->wx;
1178 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1179 nx = selmon->wx + selmon->ww - WIDTH(c);
1180 if(abs(selmon->wy - ny) < snap)
1181 ny = selmon->wy;
1182 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1183 ny = selmon->wy + selmon->wh - HEIGHT(c);
1184 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1185 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1186 togglefloating(NULL);
1187 }
1188 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1189 resize(c, nx, ny, c->w, c->h, True);
1190 break;
1191 }
1192 } while(ev.type != ButtonRelease);
1193 XUngrabPointer(dpy, CurrentTime);
1194 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1195 sendmon(c, m);
1196 selmon = m;
1197 focus(NULL);
1198 }
1199}
1200
1201Client *
1202nexttiled(Client *c) {
1203 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1204 return c;
1205}
1206
1207Monitor *
1208ptrtomon(int x, int y) {
1209 Monitor *m;
1210
1211 for(m = mons; m; m = m->next)
1212 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1213 return m;
1214 return selmon;
1215}
1216
1217void
1218propertynotify(XEvent *e) {
1219 Client *c;
1220 Window trans;
1221 XPropertyEvent *ev = &e->xproperty;
1222
1223 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1224 updatestatus();
1225 else if(ev->state == PropertyDelete)
1226 return; /* ignore */
1227 else if((c = wintoclient(ev->window))) {
1228 switch (ev->atom) {
1229 default: break;
1230 case XA_WM_TRANSIENT_FOR:
1231 XGetTransientForHint(dpy, c->win, &trans);
1232 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1233 arrange();
1234 break;
1235 case XA_WM_NORMAL_HINTS:
1236 updatesizehints(c);
1237 break;
1238 case XA_WM_HINTS:
1239 updatewmhints(c);
1240 drawbars();
1241 break;
1242 }
1243 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1244 updatetitle(c);
1245 if(c == c->mon->sel)
1246 drawbar(c->mon);
1247 }
1248 }
1249}
1250
1251void
1252quit(const Arg *arg) {
1253 running = False;
1254}
1255
1256void
1257resize(Client *c, int x, int y, int w, int h, Bool interact) {
1258 XWindowChanges wc;
1259
1260 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1261 c->x = wc.x = x;
1262 c->y = wc.y = y;
1263 c->w = wc.width = w;
1264 c->h = wc.height = h;
1265 wc.border_width = c->bw;
1266 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1267 configure(c);
1268 XSync(dpy, False);
1269 }
1270}
1271
1272void
1273resizemouse(const Arg *arg) {
1274 int ocx, ocy;
1275 int nw, nh;
1276 Client *c;
1277 Monitor *m;
1278 XEvent ev;
1279
1280 if(!(c = selmon->sel))
1281 return;
1282 restack(selmon);
1283 ocx = c->x;
1284 ocy = c->y;
1285 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1286 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1287 return;
1288 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1289 do {
1290 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1291 switch(ev.type) {
1292 case ConfigureRequest:
1293 case Expose:
1294 case MapRequest:
1295 handler[ev.type](&ev);
1296 break;
1297 case MotionNotify:
1298 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1299 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1300 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1301 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh)
1302 {
1303 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1304 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1305 togglefloating(NULL);
1306 }
1307 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1308 resize(c, c->x, c->y, nw, nh, True);
1309 break;
1310 }
1311 } while(ev.type != ButtonRelease);
1312 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1313 XUngrabPointer(dpy, CurrentTime);
1314 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1315 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1316 sendmon(c, m);
1317 selmon = m;
1318 focus(NULL);
1319 }
1320}
1321
1322void
1323restack(Monitor *m) {
1324 Client *c;
1325 XEvent ev;
1326 XWindowChanges wc;
1327
1328 drawbars();
1329 if(!m->sel)
1330 return;
1331 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1332 XRaiseWindow(dpy, m->sel->win);
1333 if(m->lt[m->sellt]->arrange) {
1334 wc.stack_mode = Below;
1335 wc.sibling = m->barwin;
1336 for(c = m->stack; c; c = c->snext)
1337 if(!c->isfloating && ISVISIBLE(c)) {
1338 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1339 wc.sibling = c->win;
1340 }
1341 }
1342 XSync(dpy, False);
1343 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1344}
1345
1346void
1347run(void) {
1348 XEvent ev;
1349
1350 /* main event loop */
1351 XSync(dpy, False);
1352 while(running && !XNextEvent(dpy, &ev))
1353 if(handler[ev.type])
1354 handler[ev.type](&ev); /* call handler */
1355}
1356
1357void
1358scan(void) {
1359 unsigned int i, num;
1360 Window d1, d2, *wins = NULL;
1361 XWindowAttributes wa;
1362
1363 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1364 for(i = 0; i < num; i++) {
1365 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1366 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1367 continue;
1368 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1369 manage(wins[i], &wa);
1370 }
1371 for(i = 0; i < num; i++) { /* now the transients */
1372 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1373 continue;
1374 if(XGetTransientForHint(dpy, wins[i], &d1)
1375 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1376 manage(wins[i], &wa);
1377 }
1378 if(wins)
1379 XFree(wins);
1380 }
1381}
1382
1383void
1384sendmon(Client *c, Monitor *m) {
1385 if(c->mon == m)
1386 return;
1387 unfocus(c);
1388 detach(c);
1389 detachstack(c);
1390 c->mon = m;
1391 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1392 attach(c);
1393 attachstack(c);
1394 focus(NULL);
1395 arrange();
1396}
1397
1398void
1399setclientstate(Client *c, long state) {
1400 long data[] = { state, None };
1401
1402 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1403 PropModeReplace, (unsigned char *)data, 2);
1404}
1405
1406void
1407setlayout(const Arg *arg) {
1408 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1409 selmon->sellt ^= 1;
1410 if(arg && arg->v)
1411 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1412 if(selmon->sel)
1413 arrange();
1414 else
1415 drawbars();
1416}
1417
1418/* arg > 1.0 will set mfact absolutly */
1419void
1420setmfact(const Arg *arg) {
1421 float f;
1422
1423 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1424 return;
1425 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1426 if(f < 0.1 || f > 0.9)
1427 return;
1428 selmon->mfact = f;
1429 arrange();
1430}
1431
1432void
1433setup(void) {
1434 unsigned int i;
1435 int w;
1436 XSetWindowAttributes wa;
1437
1438 /* clean up any zombies immediately */
1439 sigchld(0);
1440
1441 /* init screen */
1442 screen = DefaultScreen(dpy);
1443 root = RootWindow(dpy, screen);
1444 initfont(font);
1445 sw = DisplayWidth(dpy, screen);
1446 sh = DisplayHeight(dpy, screen);
1447 bh = dc.h = dc.font.height + 2;
1448 updategeom();
1449 /* init atoms */
1450 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1451 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1452 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1453 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1454 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1455 /* init cursors */
1456 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1457 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1458 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1459 /* init appearance */
1460 dc.norm[ColBorder] = getcolor(normbordercolor);
1461 dc.norm[ColBG] = getcolor(normbgcolor);
1462 dc.norm[ColFG] = getcolor(normfgcolor);
1463 dc.sel[ColBorder] = getcolor(selbordercolor);
1464 dc.sel[ColBG] = getcolor(selbgcolor);
1465 dc.sel[ColFG] = getcolor(selfgcolor);
1466 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1467 dc.gc = XCreateGC(dpy, root, 0, NULL);
1468 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1469 if(!dc.font.set)
1470 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1471 /* init bars */
1472 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1473 w = TEXTW(layouts[i].symbol);
1474 blw = MAX(blw, w);
1475 }
1476 updatebars();
1477 updatestatus();
1478 /* EWMH support per view */
1479 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1480 PropModeReplace, (unsigned char *) netatom, NetLast);
1481 /* select for events */
1482 wa.cursor = cursor[CurNormal];
1483 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1484 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1485 |PropertyChangeMask;
1486 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1487 XSelectInput(dpy, root, wa.event_mask);
1488 grabkeys();
1489}
1490
1491void
1492showhide(Client *c) {
1493 if(!c)
1494 return;
1495 if(ISVISIBLE(c)) { /* show clients top down */
1496 XMoveWindow(dpy, c->win, c->x, c->y);
1497 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1498 resize(c, c->x, c->y, c->w, c->h, False);
1499 showhide(c->snext);
1500 }
1501 else { /* hide clients bottom up */
1502 showhide(c->snext);
1503 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1504 }
1505}
1506
1507
1508void
1509sigchld(int unused) {
1510 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1511 die("Can't install SIGCHLD handler");
1512 while(0 < waitpid(-1, NULL, WNOHANG));
1513}
1514
1515void
1516spawn(const Arg *arg) {
1517 if(fork() == 0) {
1518 if(dpy)
1519 close(ConnectionNumber(dpy));
1520 setsid();
1521 execvp(((char **)arg->v)[0], (char **)arg->v);
1522 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1523 perror(" failed");
1524 exit(0);
1525 }
1526}
1527
1528void
1529tag(const Arg *arg) {
1530 if(selmon->sel && arg->ui & TAGMASK) {
1531 selmon->sel->tags = arg->ui & TAGMASK;
1532 arrange();
1533 }
1534}
1535
1536void
1537tagmon(const Arg *arg) {
1538 if(!selmon->sel || !mons->next)
1539 return;
1540 sendmon(selmon->sel, dirtomon(arg->i));
1541}
1542
1543int
1544textnw(const char *text, unsigned int len) {
1545 XRectangle r;
1546
1547 if(dc.font.set) {
1548 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1549 return r.width;
1550 }
1551 return XTextWidth(dc.font.xfont, text, len);
1552}
1553
1554void
1555tile(Monitor *m) {
1556 int x, y, h, w, mw;
1557 unsigned int i, n;
1558 Client *c;
1559
1560 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1561 if(n == 0)
1562 return;
1563 /* master */
1564 c = nexttiled(m->clients);
1565 mw = m->mfact * m->ww;
1566 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1567 if(--n == 0)
1568 return;
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 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1577 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1578 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1579 if(h != m->wh)
1580 y = c->y + HEIGHT(c);
1581 }
1582}
1583
1584void
1585togglebar(const Arg *arg) {
1586 selmon->showbar = !selmon->showbar;
1587 updatebarpos(selmon);
1588 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1589 arrange();
1590}
1591
1592void
1593togglefloating(const Arg *arg) {
1594 if(!selmon->sel)
1595 return;
1596 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1597 if(selmon->sel->isfloating)
1598 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1599 selmon->sel->w, selmon->sel->h, False);
1600 arrange();
1601}
1602
1603void
1604toggletag(const Arg *arg) {
1605 unsigned int newtags;
1606
1607 if(!selmon->sel)
1608 return;
1609 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1610 if(newtags) {
1611 selmon->sel->tags = newtags;
1612 arrange();
1613 }
1614}
1615
1616void
1617toggleview(const Arg *arg) {
1618 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1619
1620 if(newtagset) {
1621 selmon->tagset[selmon->seltags] = newtagset;
1622 arrange();
1623 }
1624}
1625
1626void
1627unfocus(Client *c) {
1628 if(!c)
1629 return;
1630 grabbuttons(c, False);
1631 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1632 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1633}
1634
1635void
1636unmanage(Client *c, Bool destroyed) {
1637 XWindowChanges wc;
1638
1639 /* The server grab construct avoids race conditions. */
1640 detach(c);
1641 detachstack(c);
1642 if(!destroyed) {
1643 wc.border_width = c->oldbw;
1644 XGrabServer(dpy);
1645 XSetErrorHandler(xerrordummy);
1646 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1647 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1648 setclientstate(c, WithdrawnState);
1649 XSync(dpy, False);
1650 XSetErrorHandler(xerror);
1651 XUngrabServer(dpy);
1652 }
1653 free(c);
1654 focus(NULL);
1655 arrange();
1656}
1657
1658void
1659unmapnotify(XEvent *e) {
1660 Client *c;
1661 XUnmapEvent *ev = &e->xunmap;
1662
1663 if((c = wintoclient(ev->window)))
1664 unmanage(c, False);
1665}
1666
1667void
1668updatebars(void) {
1669 Monitor *m;
1670 XSetWindowAttributes wa;
1671
1672 wa.override_redirect = True;
1673 wa.background_pixmap = ParentRelative;
1674 wa.event_mask = ButtonPressMask|ExposureMask;
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 CopyFromParent, DefaultVisual(dpy, screen),
1678 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1679 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1680 XMapRaised(dpy, m->barwin);
1681 }
1682}
1683
1684void
1685updatebarpos(Monitor *m) {
1686 m->wy = m->my;
1687 m->wh = m->mh;
1688 if(m->showbar) {
1689 m->wh -= bh;
1690 m->by = m->topbar ? m->wy : m->wy + m->wh;
1691 m->wy = m->topbar ? m->wy + bh : m->wy;
1692 }
1693 else
1694 m->by = -bh;
1695}
1696
1697void
1698updategeom(void) {
1699 int i, n = 1;
1700 Client *c;
1701 Monitor *newmons = NULL, *m = NULL, *tm;
1702
1703#ifdef XINERAMA
1704 int nn;
1705 XineramaScreenInfo *info = NULL;
1706
1707 if(XineramaIsActive(dpy))
1708 info = XineramaQueryScreens(dpy, &n);
1709 for(i = 1, nn = n; i < n; i++)
1710 if(info[i - 1].x_org == info[i].x_org && info[i - 1].y_org == info[i].y_org
1711 && info[i - 1].width == info[i].width && info[i - 1].height == info[i].height)
1712 --nn;
1713 n = nn; /* we only consider unique geometries as separate screens */
1714#endif /* XINERAMA */
1715 /* allocate monitor(s) for the new geometry setup */
1716 for(i = 0; i < n; i++) {
1717 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1718 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1719 m->next = newmons;
1720 newmons = m;
1721 }
1722 /* initialise monitor(s) */
1723#ifdef XINERAMA
1724 if(XineramaIsActive(dpy)) {
1725 for(i = 0, m = newmons; m; m = m->next, i++) {
1726 m->num = info[i].screen_number;
1727 m->mx = m->wx = info[i].x_org;
1728 m->my = m->wy = info[i].y_org;
1729 m->mw = m->ww = info[i].width;
1730 m->mh = m->wh = info[i].height;
1731 }
1732 XFree(info);
1733 }
1734 else
1735#endif /* XINERAMA */
1736 /* default monitor setup */
1737 {
1738 m->num = 0;
1739 m->mx = m->wx = 0;
1740 m->my = m->wy = 0;
1741 m->mw = m->ww = sw;
1742 m->mh = m->wh = sh;
1743 }
1744 /* bar geometry setup */
1745 for(m = newmons; m; m = m->next) {
1746 m->sel = m->stack = m->clients = NULL;
1747 m->seltags = 0;
1748 m->sellt = 0;
1749 m->tagset[0] = m->tagset[1] = 1;
1750 m->mfact = mfact;
1751 m->showbar = showbar;
1752 m->topbar = topbar;
1753 m->lt[0] = &layouts[0];
1754 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1755 updatebarpos(m);
1756 }
1757 /* reassign left over clients of disappeared monitors */
1758 for(tm = mons; tm; tm = tm->next)
1759 while(tm->clients) {
1760 c = tm->clients;
1761 tm->clients = c->next;
1762 detachstack(c);
1763 c->mon = newmons;
1764 attach(c);
1765 attachstack(c);
1766 }
1767 /* select focused monitor */
1768 cleanupmons();
1769 selmon = mons = newmons;
1770 selmon = wintomon(root);
1771}
1772
1773void
1774updatenumlockmask(void) {
1775 unsigned int i, j;
1776 XModifierKeymap *modmap;
1777
1778 numlockmask = 0;
1779 modmap = XGetModifierMapping(dpy);
1780 for(i = 0; i < 8; i++)
1781 for(j = 0; j < modmap->max_keypermod; j++)
1782 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1783 == XKeysymToKeycode(dpy, XK_Num_Lock))
1784 numlockmask = (1 << i);
1785 XFreeModifiermap(modmap);
1786}
1787
1788void
1789updatesizehints(Client *c) {
1790 long msize;
1791 XSizeHints size;
1792
1793 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1794 /* size is uninitialized, ensure that size.flags aren't used */
1795 size.flags = PSize;
1796 if(size.flags & PBaseSize) {
1797 c->basew = size.base_width;
1798 c->baseh = size.base_height;
1799 }
1800 else if(size.flags & PMinSize) {
1801 c->basew = size.min_width;
1802 c->baseh = size.min_height;
1803 }
1804 else
1805 c->basew = c->baseh = 0;
1806 if(size.flags & PResizeInc) {
1807 c->incw = size.width_inc;
1808 c->inch = size.height_inc;
1809 }
1810 else
1811 c->incw = c->inch = 0;
1812 if(size.flags & PMaxSize) {
1813 c->maxw = size.max_width;
1814 c->maxh = size.max_height;
1815 }
1816 else
1817 c->maxw = c->maxh = 0;
1818 if(size.flags & PMinSize) {
1819 c->minw = size.min_width;
1820 c->minh = size.min_height;
1821 }
1822 else if(size.flags & PBaseSize) {
1823 c->minw = size.base_width;
1824 c->minh = size.base_height;
1825 }
1826 else
1827 c->minw = c->minh = 0;
1828 if(size.flags & PAspect) {
1829 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1830 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1831 }
1832 else
1833 c->maxa = c->mina = 0.0;
1834 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1835 && c->maxw == c->minw && c->maxh == c->minh);
1836}
1837
1838void
1839updatetitle(Client *c) {
1840 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1841 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1842 if(c->name[0] == '\0') /* hack to mark broken clients */
1843 strcpy(c->name, broken);
1844}
1845
1846void
1847updatestatus(void) {
1848 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1849 strcpy(stext, "dwm-"VERSION);
1850 drawbar(selmon);
1851}
1852
1853void
1854updatewmhints(Client *c) {
1855 XWMHints *wmh;
1856
1857 if((wmh = XGetWMHints(dpy, c->win))) {
1858 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1859 wmh->flags &= ~XUrgencyHint;
1860 XSetWMHints(dpy, c->win, wmh);
1861 }
1862 else
1863 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1864 XFree(wmh);
1865 }
1866}
1867
1868void
1869view(const Arg *arg) {
1870 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1871 return;
1872 selmon->seltags ^= 1; /* toggle sel tagset */
1873 if(arg->ui & TAGMASK)
1874 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1875 arrange();
1876}
1877
1878Client *
1879wintoclient(Window w) {
1880 Client *c;
1881 Monitor *m;
1882
1883 for(m = mons; m; m = m->next)
1884 for(c = m->clients; c; c = c->next)
1885 if(c->win == w)
1886 return c;
1887 return NULL;
1888}
1889
1890Monitor *
1891wintomon(Window w) {
1892 int x, y;
1893 Client *c;
1894 Monitor *m;
1895
1896 if(w == root && getrootptr(&x, &y))
1897 return ptrtomon(x, y);
1898 for(m = mons; m; m = m->next)
1899 if(w == m->barwin)
1900 return m;
1901 if((c = wintoclient(w)))
1902 return c->mon;
1903 return selmon;
1904}
1905
1906/* There's no way to check accesses to destroyed windows, thus those cases are
1907 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1908 * default error handler, which may call exit. */
1909int
1910xerror(Display *dpy, XErrorEvent *ee) {
1911 if(ee->error_code == BadWindow
1912 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1913 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1914 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1915 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1916 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1917 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1918 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1919 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1920 return 0;
1921 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1922 ee->request_code, ee->error_code);
1923 return xerrorxlib(dpy, ee); /* may call exit */
1924}
1925
1926int
1927xerrordummy(Display *dpy, XErrorEvent *ee) {
1928 return 0;
1929}
1930
1931/* Startup Error handler to check if another window manager
1932 * is already running. */
1933int
1934xerrorstart(Display *dpy, XErrorEvent *ee) {
1935 otherwm = True;
1936 return -1;
1937}
1938
1939void
1940zoom(const Arg *arg) {
1941 Client *c = selmon->sel;
1942
1943 if(!selmon->lt[selmon->sellt]->arrange
1944 || selmon->lt[selmon->sellt]->arrange == monocle
1945 || (selmon->sel && selmon->sel->isfloating))
1946 return;
1947 if(c == nexttiled(selmon->clients))
1948 if(!c || !(c = nexttiled(c->next)))
1949 return;
1950 detach(c);
1951 attach(c);
1952 focus(c);
1953 arrange();
1954}
1955
1956int
1957main(int argc, char *argv[]) {
1958 if(argc == 2 && !strcmp("-v", argv[1]))
1959 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1960 else if(argc != 1)
1961 die("usage: dwm [-v]\n");
1962 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1963 fputs("warning: no locale support\n", stderr);
1964 if(!(dpy = XOpenDisplay(NULL)))
1965 die("dwm: cannot open display\n");
1966 checkotherwm();
1967 setup();
1968 scan();
1969 run();
1970 cleanup();
1971 XCloseDisplay(dpy);
1972 return 0;
1973}