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 const char *ltsymbol;
125 float mfact;
126 int num;
127 int by; /* bar geometry */
128 int mx, my, mw, mh; /* screen size */
129 int wx, wy, ww, wh; /* window area */
130 unsigned int seltags;
131 unsigned int sellt;
132 unsigned int tagset[2];
133 Bool showbar;
134 Bool topbar;
135 Client *clients;
136 Client *sel;
137 Client *stack;
138 Monitor *next;
139 Window barwin;
140 const Layout *lt[2];
141};
142
143typedef struct {
144 const char *class;
145 const char *instance;
146 const char *title;
147 unsigned int tags;
148 Bool isfloating;
149 int monitor;
150} Rule;
151
152/* function declarations */
153static void applyrules(Client *c);
154static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
155static void arrange(void);
156static void attach(Client *c);
157static void attachstack(Client *c);
158static void buttonpress(XEvent *e);
159static void checkotherwm(void);
160static void cleanup(void);
161static void cleanupmons(void);
162static void clearurgent(Client *c);
163static void configure(Client *c);
164static void configurenotify(XEvent *e);
165static void configurerequest(XEvent *e);
166static void destroynotify(XEvent *e);
167static void detach(Client *c);
168static void detachstack(Client *c);
169static void die(const char *errstr, ...);
170static Monitor *dirtomon(int dir);
171static void drawbar(Monitor *m);
172static void drawbars(void);
173static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
174static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
175static void enternotify(XEvent *e);
176static void expose(XEvent *e);
177static void focus(Client *c);
178static void focusin(XEvent *e);
179static void focusmon(const Arg *arg);
180static void focusstack(const Arg *arg);
181static unsigned long getcolor(const char *colstr);
182static Bool getrootptr(int *x, int *y);
183static long getstate(Window w);
184static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
185static void grabbuttons(Client *c, Bool focused);
186static void grabkeys(void);
187static void initfont(const char *fontstr);
188static Bool isprotodel(Client *c);
189static void keypress(XEvent *e);
190static void killclient(const Arg *arg);
191static void manage(Window w, XWindowAttributes *wa);
192static void mappingnotify(XEvent *e);
193static void maprequest(XEvent *e);
194static void monocle(Monitor *m);
195static void movemouse(const Arg *arg);
196static Client *nexttiled(Client *c);
197static Monitor *ptrtomon(int x, int y);
198static void propertynotify(XEvent *e);
199static void quit(const Arg *arg);
200static void resize(Client *c, int x, int y, int w, int h, Bool interact);
201static void resizemouse(const Arg *arg);
202static void restack(Monitor *m);
203static void run(void);
204static void scan(void);
205static void sendmon(Client *c, Monitor *m);
206static void setclientstate(Client *c, long state);
207static void setlayout(const Arg *arg);
208static void setmfact(const Arg *arg);
209static void setup(void);
210static void showhide(Client *c);
211static void sigchld(int unused);
212static void spawn(const Arg *arg);
213static void tag(const Arg *arg);
214static void tagmon(const Arg *arg);
215static int textnw(const char *text, unsigned int len);
216static void tile(Monitor *);
217static void togglebar(const Arg *arg);
218static void togglefloating(const Arg *arg);
219static void toggletag(const Arg *arg);
220static void toggleview(const Arg *arg);
221static void unfocus(Client *c);
222static void unmanage(Client *c, Bool destroyed);
223static void unmapnotify(XEvent *e);
224static void updategeom(void);
225static void updatebarpos(Monitor *m);
226static void updatebars(void);
227static void updatenumlockmask(void);
228static void updatesizehints(Client *c);
229static void updatestatus(void);
230static void updatetitle(Client *c);
231static void updatewmhints(Client *c);
232static void view(const Arg *arg);
233static Client *wintoclient(Window w);
234static Monitor *wintomon(Window w);
235static int xerror(Display *dpy, XErrorEvent *ee);
236static int xerrordummy(Display *dpy, XErrorEvent *ee);
237static int xerrorstart(Display *dpy, XErrorEvent *ee);
238static void zoom(const Arg *arg);
239
240/* variables */
241static const char broken[] = "broken";
242static char stext[256];
243static int screen;
244static int sw, sh; /* X display screen geometry width, height */
245static int bh, blw = 0; /* bar geometry */
246static int (*xerrorxlib)(Display *, XErrorEvent *);
247static unsigned int numlockmask = 0;
248static void (*handler[LASTEvent]) (XEvent *) = {
249 [ButtonPress] = buttonpress,
250 [ConfigureRequest] = configurerequest,
251 [ConfigureNotify] = configurenotify,
252 [DestroyNotify] = destroynotify,
253 [EnterNotify] = enternotify,
254 [Expose] = expose,
255 [FocusIn] = focusin,
256 [KeyPress] = keypress,
257 [MappingNotify] = mappingnotify,
258 [MapRequest] = maprequest,
259 [PropertyNotify] = propertynotify,
260 [UnmapNotify] = unmapnotify
261};
262static Atom wmatom[WMLast], netatom[NetLast];
263static Bool otherwm;
264static Bool running = True;
265static Cursor cursor[CurLast];
266static Display *dpy;
267static DC dc;
268static Monitor *mons = NULL, *selmon = NULL;
269static Window root;
270
271/* configuration, allows nested code to access above variables */
272#include "config.h"
273
274/* compile-time check if all tags fit into an unsigned int bit array. */
275struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
276
277/* function implementations */
278void
279applyrules(Client *c) {
280 const char *class, *instance;
281 unsigned int i;
282 const Rule *r;
283 Monitor *m;
284 XClassHint ch = { 0 };
285
286 /* rule matching */
287 c->isfloating = c->tags = 0;
288 if(XGetClassHint(dpy, c->win, &ch)) {
289 class = ch.res_class ? ch.res_class : broken;
290 instance = ch.res_name ? ch.res_name : broken;
291 for(i = 0; i < LENGTH(rules); i++) {
292 r = &rules[i];
293 if((!r->title || strstr(c->name, r->title))
294 && (!r->class || strstr(class, r->class))
295 && (!r->instance || strstr(instance, r->instance)))
296 {
297 c->isfloating = r->isfloating;
298 c->tags |= r->tags;
299 for(m = mons; m && m->num != r->monitor; m = m->next);
300 if(m)
301 c->mon = m;
302 }
303 }
304 if(ch.res_class)
305 XFree(ch.res_class);
306 if(ch.res_name)
307 XFree(ch.res_name);
308 }
309 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
310}
311
312Bool
313applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
314 Bool baseismin;
315 Monitor *m = c->mon;
316
317 /* set minimum possible */
318 *w = MAX(1, *w);
319 *h = MAX(1, *h);
320 if(interact) {
321 if(*x > sw)
322 *x = sw - WIDTH(c);
323 if(*y > sh)
324 *y = sh - HEIGHT(c);
325 if(*x + *w + 2 * c->bw < 0)
326 *x = 0;
327 if(*y + *h + 2 * c->bw < 0)
328 *y = 0;
329 }
330 else {
331 if(*x > m->mx + m->mw)
332 *x = m->mx + m->mw - WIDTH(c);
333 if(*y > m->my + m->mh)
334 *y = m->my + m->mh - HEIGHT(c);
335 if(*x + *w + 2 * c->bw < m->mx)
336 *x = m->mx;
337 if(*y + *h + 2 * c->bw < m->my)
338 *y = m->my;
339 }
340 if(*h < bh)
341 *h = bh;
342 if(*w < bh)
343 *w = bh;
344 if(resizehints || c->isfloating) {
345 /* see last two sentences in ICCCM 4.1.2.3 */
346 baseismin = c->basew == c->minw && c->baseh == c->minh;
347 if(!baseismin) { /* temporarily remove base dimensions */
348 *w -= c->basew;
349 *h -= c->baseh;
350 }
351 /* adjust for aspect limits */
352 if(c->mina > 0 && c->maxa > 0) {
353 if(c->maxa < (float)*w / *h)
354 *w = *h * c->maxa + 0.5;
355 else if(c->mina < (float)*h / *w)
356 *h = *w * c->mina + 0.5;
357 }
358 if(baseismin) { /* increment calculation requires this */
359 *w -= c->basew;
360 *h -= c->baseh;
361 }
362 /* adjust for increment value */
363 if(c->incw)
364 *w -= *w % c->incw;
365 if(c->inch)
366 *h -= *h % c->inch;
367 /* restore base dimensions */
368 *w += c->basew;
369 *h += c->baseh;
370 *w = MAX(*w, c->minw);
371 *h = MAX(*h, c->minh);
372 if(c->maxw)
373 *w = MIN(*w, c->maxw);
374 if(c->maxh)
375 *h = MIN(*h, c->maxh);
376 }
377 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
378}
379
380void
381arrange(void) {
382 Monitor *m;
383
384 for(m = mons; m; m = m->next)
385 showhide(m->stack);
386 focus(NULL);
387 for(m = mons; m; m = m->next) {
388 m->ltsymbol = m->lt[m->sellt]->symbol;
389 if(m->lt[m->sellt]->arrange)
390 m->lt[m->sellt]->arrange(m);
391 restack(m);
392 }
393}
394
395void
396attach(Client *c) {
397 c->next = c->mon->clients;
398 c->mon->clients = c;
399}
400
401void
402attachstack(Client *c) {
403 c->snext = c->mon->stack;
404 c->mon->stack = c;
405}
406
407void
408buttonpress(XEvent *e) {
409 unsigned int i, x, click;
410 Arg arg = {0};
411 Client *c;
412 Monitor *m;
413 XButtonPressedEvent *ev = &e->xbutton;
414
415 click = ClkRootWin;
416 /* focus monitor if necessary */
417 if((m = wintomon(ev->window)) && m != selmon) {
418 unfocus(selmon->sel);
419 selmon = m;
420 focus(NULL);
421 }
422 if(ev->window == selmon->barwin) {
423 i = x = 0;
424 do {
425 x += TEXTW(tags[i]);
426 } while(ev->x >= x && ++i < LENGTH(tags));
427 if(i < LENGTH(tags)) {
428 click = ClkTagBar;
429 arg.ui = 1 << i;
430 }
431 else if(ev->x < x + blw)
432 click = ClkLtSymbol;
433 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
434 click = ClkStatusText;
435 else
436 click = ClkWinTitle;
437 }
438 else if((c = wintoclient(ev->window))) {
439 focus(c);
440 click = ClkClientWin;
441 }
442 for(i = 0; i < LENGTH(buttons); i++)
443 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
444 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
445 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
446}
447
448void
449checkotherwm(void) {
450 otherwm = False;
451 xerrorxlib = XSetErrorHandler(xerrorstart);
452 /* this causes an error if some other window manager is running */
453 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
454 XSync(dpy, False);
455 if(otherwm)
456 die("dwm: another window manager is already running\n");
457 XSetErrorHandler(xerror);
458 XSync(dpy, False);
459}
460
461void
462cleanup(void) {
463 Arg a = {.ui = ~0};
464 Layout foo = { "", NULL };
465 Monitor *m;
466
467 view(&a);
468 selmon->lt[selmon->sellt] = &foo;
469 for(m = mons; m; m = m->next)
470 while(m->stack)
471 unmanage(m->stack, False);
472 if(dc.font.set)
473 XFreeFontSet(dpy, dc.font.set);
474 else
475 XFreeFont(dpy, dc.font.xfont);
476 XUngrabKey(dpy, AnyKey, AnyModifier, root);
477 XFreePixmap(dpy, dc.drawable);
478 XFreeGC(dpy, dc.gc);
479 XFreeCursor(dpy, cursor[CurNormal]);
480 XFreeCursor(dpy, cursor[CurResize]);
481 XFreeCursor(dpy, cursor[CurMove]);
482 cleanupmons();
483 XSync(dpy, False);
484 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
485}
486
487void
488cleanupmons(void) {
489 Monitor *m;
490
491 while(mons) {
492 m = mons->next;
493 XUnmapWindow(dpy, mons->barwin);
494 XDestroyWindow(dpy, mons->barwin);
495 free(mons);
496 mons = m;
497 }
498}
499
500void
501clearurgent(Client *c) {
502 XWMHints *wmh;
503
504 c->isurgent = False;
505 if(!(wmh = XGetWMHints(dpy, c->win)))
506 return;
507 wmh->flags &= ~XUrgencyHint;
508 XSetWMHints(dpy, c->win, wmh);
509 XFree(wmh);
510}
511
512void
513configure(Client *c) {
514 XConfigureEvent ce;
515
516 ce.type = ConfigureNotify;
517 ce.display = dpy;
518 ce.event = c->win;
519 ce.window = c->win;
520 ce.x = c->x;
521 ce.y = c->y;
522 ce.width = c->w;
523 ce.height = c->h;
524 ce.border_width = c->bw;
525 ce.above = None;
526 ce.override_redirect = False;
527 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
528}
529
530void
531configurenotify(XEvent *e) {
532 Monitor *m;
533 XConfigureEvent *ev = &e->xconfigure;
534
535 if(ev->window == root) {
536 sw = ev->width;
537 sh = ev->height;
538 updategeom();
539 if(dc.drawable != 0)
540 XFreePixmap(dpy, dc.drawable);
541 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
542 updatebars();
543 for(m = mons; m; m = m->next)
544 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
545 arrange();
546 }
547}
548
549void
550configurerequest(XEvent *e) {
551 Client *c;
552 Monitor *m;
553 XConfigureRequestEvent *ev = &e->xconfigurerequest;
554 XWindowChanges wc;
555
556 if((c = wintoclient(ev->window))) {
557 if(ev->value_mask & CWBorderWidth)
558 c->bw = ev->border_width;
559 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
560 m = c->mon;
561 if(ev->value_mask & CWX)
562 c->x = m->mx + ev->x;
563 if(ev->value_mask & CWY)
564 c->y = m->my + ev->y;
565 if(ev->value_mask & CWWidth)
566 c->w = ev->width;
567 if(ev->value_mask & CWHeight)
568 c->h = ev->height;
569 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
570 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
571 if((c->y + c->h) > m->my + m->mh && c->isfloating)
572 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
573 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
574 configure(c);
575 if(ISVISIBLE(c))
576 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
577 }
578 else
579 configure(c);
580 }
581 else {
582 wc.x = ev->x;
583 wc.y = ev->y;
584 wc.width = ev->width;
585 wc.height = ev->height;
586 wc.border_width = ev->border_width;
587 wc.sibling = ev->above;
588 wc.stack_mode = ev->detail;
589 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
590 }
591 XSync(dpy, False);
592}
593
594void
595destroynotify(XEvent *e) {
596 Client *c;
597 XDestroyWindowEvent *ev = &e->xdestroywindow;
598
599 if((c = wintoclient(ev->window)))
600 unmanage(c, True);
601}
602
603void
604detach(Client *c) {
605 Client **tc;
606
607 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
608 *tc = c->next;
609}
610
611void
612detachstack(Client *c) {
613 Client **tc, *t;
614
615 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
616 *tc = c->snext;
617
618 if(c == c->mon->sel) {
619 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
620 c->mon->sel = t;
621 }
622}
623
624void
625die(const char *errstr, ...) {
626 va_list ap;
627
628 va_start(ap, errstr);
629 vfprintf(stderr, errstr, ap);
630 va_end(ap);
631 exit(EXIT_FAILURE);
632}
633
634Monitor *
635dirtomon(int dir) {
636 Monitor *m = NULL;
637
638 if(dir > 0) {
639 if(!(m = selmon->next))
640 m = mons;
641 }
642 else {
643 if(selmon == mons)
644 for(m = mons; m->next; m = m->next);
645 else
646 for(m = mons; m->next != selmon; m = m->next);
647 }
648 return m;
649}
650
651void
652drawbar(Monitor *m) {
653 int x;
654 unsigned int i, occ = 0, urg = 0;
655 unsigned long *col;
656 Client *c;
657
658 for(c = m->clients; c; c = c->next) {
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 dc.w = blw = TEXTW(m->ltsymbol);
673 drawtext(m->ltsymbol, dc.norm, False);
674 dc.x += dc.w;
675 x = dc.x;
676 if(m == selmon) { /* status is only drawn on selected monitor */
677 dc.w = TEXTW(stext);
678 dc.x = m->ww - dc.w;
679 if(dc.x < x) {
680 dc.x = x;
681 dc.w = m->ww - x;
682 }
683 drawtext(stext, dc.norm, False);
684 }
685 else
686 dc.x = m->ww;
687 if((dc.w = dc.x - x) > bh) {
688 dc.x = x;
689 if(m->sel) {
690 col = m == selmon ? dc.sel : dc.norm;
691 drawtext(m->sel->name, col, False);
692 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
693 }
694 else
695 drawtext(NULL, dc.norm, False);
696 }
697 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
698 XSync(dpy, False);
699}
700
701void
702drawbars(void) {
703 Monitor *m;
704
705 for(m = mons; m; m = m->next)
706 drawbar(m);
707}
708
709void
710drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
711 int x;
712 XGCValues gcv;
713 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
714
715 gcv.foreground = col[invert ? ColBG : ColFG];
716 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
717 x = (dc.font.ascent + dc.font.descent + 2) / 4;
718 r.x = dc.x + 1;
719 r.y = dc.y + 1;
720 if(filled) {
721 r.width = r.height = x + 1;
722 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
723 }
724 else if(empty) {
725 r.width = r.height = x;
726 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
727 }
728}
729
730void
731drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
732 char buf[256];
733 int i, x, y, h, len, olen;
734 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
735
736 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
737 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
738 if(!text)
739 return;
740 olen = strlen(text);
741 h = dc.font.ascent + dc.font.descent;
742 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
743 x = dc.x + (h / 2);
744 /* shorten text if necessary */
745 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
746 if(!len)
747 return;
748 memcpy(buf, text, len);
749 if(len < olen)
750 for(i = len; i && i > len - 3; buf[--i] = '.');
751 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
752 if(dc.font.set)
753 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
754 else
755 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
756}
757
758void
759enternotify(XEvent *e) {
760 Client *c;
761 Monitor *m;
762 XCrossingEvent *ev = &e->xcrossing;
763
764 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
765 return;
766 if((m = wintomon(ev->window)) && m != selmon) {
767 unfocus(selmon->sel);
768 selmon = m;
769 }
770 if((c = wintoclient(ev->window)))
771 focus(c);
772 else
773 focus(NULL);
774}
775
776void
777expose(XEvent *e) {
778 Monitor *m;
779 XExposeEvent *ev = &e->xexpose;
780
781 if(ev->count == 0 && (m = wintomon(ev->window)))
782 drawbar(m);
783}
784
785void
786focus(Client *c) {
787 if(!c || !ISVISIBLE(c))
788 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
789 if(selmon->sel)
790 unfocus(selmon->sel);
791 if(c) {
792 if(c->mon != selmon)
793 selmon = c->mon;
794 if(c->isurgent)
795 clearurgent(c);
796 detachstack(c);
797 attachstack(c);
798 grabbuttons(c, True);
799 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
800 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
801 }
802 else
803 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
804 selmon->sel = c;
805 drawbars();
806}
807
808void
809focusin(XEvent *e) { /* there are some broken focus acquiring clients */
810 XFocusChangeEvent *ev = &e->xfocus;
811
812 if(selmon->sel && ev->window != selmon->sel->win)
813 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
814}
815
816void
817focusmon(const Arg *arg) {
818 Monitor *m = NULL;
819
820 if(!mons->next)
821 return;
822 m = dirtomon(arg->i);
823 unfocus(selmon->sel);
824 selmon = m;
825 focus(NULL);
826}
827
828void
829focusstack(const Arg *arg) {
830 Client *c = NULL, *i;
831
832 if(!selmon->sel)
833 return;
834 if(arg->i > 0) {
835 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
836 if(!c)
837 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
838 }
839 else {
840 for(i = selmon->clients; i != selmon->sel; i = i->next)
841 if(ISVISIBLE(i))
842 c = i;
843 if(!c)
844 for(; i; i = i->next)
845 if(ISVISIBLE(i))
846 c = i;
847 }
848 if(c) {
849 focus(c);
850 restack(selmon);
851 }
852}
853
854unsigned long
855getcolor(const char *colstr) {
856 Colormap cmap = DefaultColormap(dpy, screen);
857 XColor color;
858
859 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
860 die("error, cannot allocate color '%s'\n", colstr);
861 return color.pixel;
862}
863
864Bool
865getrootptr(int *x, int *y) {
866 int di;
867 unsigned int dui;
868 Window dummy;
869
870 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
871}
872
873long
874getstate(Window w) {
875 int format, status;
876 long result = -1;
877 unsigned char *p = NULL;
878 unsigned long n, extra;
879 Atom real;
880
881 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
882 &real, &format, &n, &extra, (unsigned char **)&p);
883 if(status != Success)
884 return -1;
885 if(n != 0)
886 result = *p;
887 XFree(p);
888 return result;
889}
890
891Bool
892gettextprop(Window w, Atom atom, char *text, unsigned int size) {
893 char **list = NULL;
894 int n;
895 XTextProperty name;
896
897 if(!text || size == 0)
898 return False;
899 text[0] = '\0';
900 XGetTextProperty(dpy, w, &name, atom);
901 if(!name.nitems)
902 return False;
903 if(name.encoding == XA_STRING)
904 strncpy(text, (char *)name.value, size - 1);
905 else {
906 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
907 strncpy(text, *list, size - 1);
908 XFreeStringList(list);
909 }
910 }
911 text[size - 1] = '\0';
912 XFree(name.value);
913 return True;
914}
915
916void
917grabbuttons(Client *c, Bool focused) {
918 updatenumlockmask();
919 {
920 unsigned int i, j;
921 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
922 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
923 if(focused) {
924 for(i = 0; i < LENGTH(buttons); i++)
925 if(buttons[i].click == ClkClientWin)
926 for(j = 0; j < LENGTH(modifiers); j++)
927 XGrabButton(dpy, buttons[i].button,
928 buttons[i].mask | modifiers[j],
929 c->win, False, BUTTONMASK,
930 GrabModeAsync, GrabModeSync, None, None);
931 }
932 else
933 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
934 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
935 }
936}
937
938void
939grabkeys(void) {
940 updatenumlockmask();
941 {
942 unsigned int i, j;
943 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
944 KeyCode code;
945
946 XUngrabKey(dpy, AnyKey, AnyModifier, root);
947 for(i = 0; i < LENGTH(keys); i++) {
948 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
949 for(j = 0; j < LENGTH(modifiers); j++)
950 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
951 True, GrabModeAsync, GrabModeAsync);
952 }
953 }
954}
955
956void
957initfont(const char *fontstr) {
958 char *def, **missing;
959 int i, n;
960
961 missing = NULL;
962 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
963 if(missing) {
964 while(n--)
965 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
966 XFreeStringList(missing);
967 }
968 if(dc.font.set) {
969 XFontSetExtents *font_extents;
970 XFontStruct **xfonts;
971 char **font_names;
972
973 dc.font.ascent = dc.font.descent = 0;
974 font_extents = XExtentsOfFontSet(dc.font.set);
975 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
976 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
977 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
978 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
979 xfonts++;
980 }
981 }
982 else {
983 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
984 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
985 die("error, cannot load font: '%s'\n", fontstr);
986 dc.font.ascent = dc.font.xfont->ascent;
987 dc.font.descent = dc.font.xfont->descent;
988 }
989 dc.font.height = dc.font.ascent + dc.font.descent;
990}
991
992Bool
993isprotodel(Client *c) {
994 int i, n;
995 Atom *protocols;
996 Bool ret = False;
997
998 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
999 for(i = 0; !ret && i < n; i++)
1000 if(protocols[i] == wmatom[WMDelete])
1001 ret = True;
1002 XFree(protocols);
1003 }
1004 return ret;
1005}
1006
1007void
1008keypress(XEvent *e) {
1009 unsigned int i;
1010 KeySym keysym;
1011 XKeyEvent *ev;
1012
1013 ev = &e->xkey;
1014 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1015 for(i = 0; i < LENGTH(keys); i++)
1016 if(keysym == keys[i].keysym
1017 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1018 && keys[i].func)
1019 keys[i].func(&(keys[i].arg));
1020}
1021
1022void
1023killclient(const Arg *arg) {
1024 XEvent ev;
1025
1026 if(!selmon->sel)
1027 return;
1028 if(isprotodel(selmon->sel)) {
1029 ev.type = ClientMessage;
1030 ev.xclient.window = selmon->sel->win;
1031 ev.xclient.message_type = wmatom[WMProtocols];
1032 ev.xclient.format = 32;
1033 ev.xclient.data.l[0] = wmatom[WMDelete];
1034 ev.xclient.data.l[1] = CurrentTime;
1035 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1036 }
1037 else {
1038 XGrabServer(dpy);
1039 XSetErrorHandler(xerrordummy);
1040 XSetCloseDownMode(dpy, DestroyAll);
1041 XKillClient(dpy, selmon->sel->win);
1042 XSync(dpy, False);
1043 XSetErrorHandler(xerror);
1044 XUngrabServer(dpy);
1045 }
1046}
1047
1048void
1049manage(Window w, XWindowAttributes *wa) {
1050 static Client cz;
1051 Client *c, *t = NULL;
1052 Window trans = None;
1053 XWindowChanges wc;
1054
1055 if(!(c = malloc(sizeof(Client))))
1056 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1057 *c = cz;
1058 c->win = w;
1059 updatetitle(c);
1060 if(XGetTransientForHint(dpy, w, &trans))
1061 t = wintoclient(trans);
1062 if(t) {
1063 c->mon = t->mon;
1064 c->tags = t->tags;
1065 }
1066 else {
1067 c->mon = selmon;
1068 applyrules(c);
1069 }
1070 /* geometry */
1071 c->x = wa->x + c->mon->wx;
1072 c->y = wa->y + c->mon->wy;
1073 c->w = wa->width;
1074 c->h = wa->height;
1075 c->oldbw = wa->border_width;
1076 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1077 c->x = c->mon->mx;
1078 c->y = c->mon->my;
1079 c->bw = 0;
1080 }
1081 else {
1082 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1083 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1084 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1085 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1086 c->x = MAX(c->x, c->mon->mx);
1087 /* only fix client y-offset, if the client center might cover the bar */
1088 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1089 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1090 c->bw = borderpx;
1091 }
1092 wc.border_width = c->bw;
1093 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1094 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1095 configure(c); /* propagates border_width, if size doesn't change */
1096 updatesizehints(c);
1097 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1098 grabbuttons(c, False);
1099 if(!c->isfloating)
1100 c->isfloating = trans != None || c->isfixed;
1101 if(c->isfloating)
1102 XRaiseWindow(dpy, c->win);
1103 attach(c);
1104 attachstack(c);
1105 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1106 XMapWindow(dpy, c->win);
1107 setclientstate(c, NormalState);
1108 arrange();
1109}
1110
1111void
1112mappingnotify(XEvent *e) {
1113 XMappingEvent *ev = &e->xmapping;
1114
1115 XRefreshKeyboardMapping(ev);
1116 if(ev->request == MappingKeyboard)
1117 grabkeys();
1118}
1119
1120void
1121maprequest(XEvent *e) {
1122 static XWindowAttributes wa;
1123 XMapRequestEvent *ev = &e->xmaprequest;
1124
1125 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1126 return;
1127 if(wa.override_redirect)
1128 return;
1129 if(!wintoclient(ev->window))
1130 manage(ev->window, &wa);
1131}
1132
1133void
1134monocle(Monitor *m) {
1135 static char ntext[8];
1136 unsigned int n = 0;
1137 Client *c;
1138
1139 for(c = m->clients; c; c = c->next)
1140 if(ISVISIBLE(c))
1141 n++;
1142 if(n > 0) { /* override layout symbol */
1143 snprintf(ntext, sizeof ntext, "[%d]", n);
1144 m->ltsymbol = ntext;
1145 }
1146 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1147 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1148}
1149
1150void
1151movemouse(const Arg *arg) {
1152 int x, y, ocx, ocy, nx, ny;
1153 Client *c;
1154 Monitor *m;
1155 XEvent ev;
1156
1157 if(!(c = selmon->sel))
1158 return;
1159 restack(selmon);
1160 ocx = c->x;
1161 ocy = c->y;
1162 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1163 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1164 return;
1165 if(!getrootptr(&x, &y))
1166 return;
1167 do {
1168 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1169 switch (ev.type) {
1170 case ConfigureRequest:
1171 case Expose:
1172 case MapRequest:
1173 handler[ev.type](&ev);
1174 break;
1175 case MotionNotify:
1176 nx = ocx + (ev.xmotion.x - x);
1177 ny = ocy + (ev.xmotion.y - y);
1178 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1179 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1180 if(abs(selmon->wx - nx) < snap)
1181 nx = selmon->wx;
1182 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1183 nx = selmon->wx + selmon->ww - WIDTH(c);
1184 if(abs(selmon->wy - ny) < snap)
1185 ny = selmon->wy;
1186 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1187 ny = selmon->wy + selmon->wh - HEIGHT(c);
1188 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1189 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1190 togglefloating(NULL);
1191 }
1192 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1193 resize(c, nx, ny, c->w, c->h, True);
1194 break;
1195 }
1196 } while(ev.type != ButtonRelease);
1197 XUngrabPointer(dpy, CurrentTime);
1198 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1199 sendmon(c, m);
1200 selmon = m;
1201 focus(NULL);
1202 }
1203}
1204
1205Client *
1206nexttiled(Client *c) {
1207 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1208 return c;
1209}
1210
1211Monitor *
1212ptrtomon(int x, int y) {
1213 Monitor *m;
1214
1215 for(m = mons; m; m = m->next)
1216 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1217 return m;
1218 return selmon;
1219}
1220
1221void
1222propertynotify(XEvent *e) {
1223 Client *c;
1224 Window trans;
1225 XPropertyEvent *ev = &e->xproperty;
1226
1227 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1228 updatestatus();
1229 else if(ev->state == PropertyDelete)
1230 return; /* ignore */
1231 else if((c = wintoclient(ev->window))) {
1232 switch (ev->atom) {
1233 default: break;
1234 case XA_WM_TRANSIENT_FOR:
1235 XGetTransientForHint(dpy, c->win, &trans);
1236 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1237 arrange();
1238 break;
1239 case XA_WM_NORMAL_HINTS:
1240 updatesizehints(c);
1241 break;
1242 case XA_WM_HINTS:
1243 updatewmhints(c);
1244 drawbars();
1245 break;
1246 }
1247 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1248 updatetitle(c);
1249 if(c == c->mon->sel)
1250 drawbar(c->mon);
1251 }
1252 }
1253}
1254
1255void
1256quit(const Arg *arg) {
1257 running = False;
1258}
1259
1260void
1261resize(Client *c, int x, int y, int w, int h, Bool interact) {
1262 XWindowChanges wc;
1263
1264 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1265 c->x = wc.x = x;
1266 c->y = wc.y = y;
1267 c->w = wc.width = w;
1268 c->h = wc.height = h;
1269 wc.border_width = c->bw;
1270 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1271 configure(c);
1272 XSync(dpy, False);
1273 }
1274}
1275
1276void
1277resizemouse(const Arg *arg) {
1278 int ocx, ocy;
1279 int nw, nh;
1280 Client *c;
1281 Monitor *m;
1282 XEvent ev;
1283
1284 if(!(c = selmon->sel))
1285 return;
1286 restack(selmon);
1287 ocx = c->x;
1288 ocy = c->y;
1289 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1290 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1291 return;
1292 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1293 do {
1294 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1295 switch(ev.type) {
1296 case ConfigureRequest:
1297 case Expose:
1298 case MapRequest:
1299 handler[ev.type](&ev);
1300 break;
1301 case MotionNotify:
1302 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1303 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1304 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1305 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh)
1306 {
1307 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1308 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1309 togglefloating(NULL);
1310 }
1311 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1312 resize(c, c->x, c->y, nw, nh, True);
1313 break;
1314 }
1315 } while(ev.type != ButtonRelease);
1316 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1317 XUngrabPointer(dpy, CurrentTime);
1318 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1319 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1320 sendmon(c, m);
1321 selmon = m;
1322 focus(NULL);
1323 }
1324}
1325
1326void
1327restack(Monitor *m) {
1328 Client *c;
1329 XEvent ev;
1330 XWindowChanges wc;
1331
1332 drawbars();
1333 if(!m->sel)
1334 return;
1335 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1336 XRaiseWindow(dpy, m->sel->win);
1337 if(m->lt[m->sellt]->arrange) {
1338 wc.stack_mode = Below;
1339 wc.sibling = m->barwin;
1340 for(c = m->stack; c; c = c->snext)
1341 if(!c->isfloating && ISVISIBLE(c)) {
1342 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1343 wc.sibling = c->win;
1344 }
1345 }
1346 XSync(dpy, False);
1347 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1348}
1349
1350void
1351run(void) {
1352 XEvent ev;
1353
1354 /* main event loop */
1355 XSync(dpy, False);
1356 while(running && !XNextEvent(dpy, &ev))
1357 if(handler[ev.type])
1358 handler[ev.type](&ev); /* call handler */
1359}
1360
1361void
1362scan(void) {
1363 unsigned int i, num;
1364 Window d1, d2, *wins = NULL;
1365 XWindowAttributes wa;
1366
1367 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1368 for(i = 0; i < num; i++) {
1369 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1370 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1371 continue;
1372 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1373 manage(wins[i], &wa);
1374 }
1375 for(i = 0; i < num; i++) { /* now the transients */
1376 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1377 continue;
1378 if(XGetTransientForHint(dpy, wins[i], &d1)
1379 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1380 manage(wins[i], &wa);
1381 }
1382 if(wins)
1383 XFree(wins);
1384 }
1385}
1386
1387void
1388sendmon(Client *c, Monitor *m) {
1389 if(c->mon == m)
1390 return;
1391 unfocus(c);
1392 detach(c);
1393 detachstack(c);
1394 c->mon = m;
1395 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1396 attach(c);
1397 attachstack(c);
1398 focus(NULL);
1399 arrange();
1400}
1401
1402void
1403setclientstate(Client *c, long state) {
1404 long data[] = { state, None };
1405
1406 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1407 PropModeReplace, (unsigned char *)data, 2);
1408}
1409
1410void
1411setlayout(const Arg *arg) {
1412 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1413 selmon->sellt ^= 1;
1414 if(arg && arg->v)
1415 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1416 if(selmon->sel)
1417 arrange();
1418 else
1419 drawbars();
1420}
1421
1422/* arg > 1.0 will set mfact absolutly */
1423void
1424setmfact(const Arg *arg) {
1425 float f;
1426
1427 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1428 return;
1429 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1430 if(f < 0.1 || f > 0.9)
1431 return;
1432 selmon->mfact = f;
1433 arrange();
1434}
1435
1436void
1437setup(void) {
1438 XSetWindowAttributes wa;
1439
1440 /* clean up any zombies immediately */
1441 sigchld(0);
1442
1443 /* init screen */
1444 screen = DefaultScreen(dpy);
1445 root = RootWindow(dpy, screen);
1446 initfont(font);
1447 sw = DisplayWidth(dpy, screen);
1448 sh = DisplayHeight(dpy, screen);
1449 bh = dc.h = dc.font.height + 2;
1450 updategeom();
1451 /* init atoms */
1452 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1453 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1454 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1455 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1456 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1457 /* init cursors */
1458 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1459 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1460 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1461 /* init appearance */
1462 dc.norm[ColBorder] = getcolor(normbordercolor);
1463 dc.norm[ColBG] = getcolor(normbgcolor);
1464 dc.norm[ColFG] = getcolor(normfgcolor);
1465 dc.sel[ColBorder] = getcolor(selbordercolor);
1466 dc.sel[ColBG] = getcolor(selbgcolor);
1467 dc.sel[ColFG] = getcolor(selfgcolor);
1468 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1469 dc.gc = XCreateGC(dpy, root, 0, NULL);
1470 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1471 if(!dc.font.set)
1472 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1473 /* init bars */
1474 updatebars();
1475 updatestatus();
1476 /* EWMH support per view */
1477 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1478 PropModeReplace, (unsigned char *) netatom, NetLast);
1479 /* select for events */
1480 wa.cursor = cursor[CurNormal];
1481 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1482 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1483 |PropertyChangeMask;
1484 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1485 XSelectInput(dpy, root, wa.event_mask);
1486 grabkeys();
1487}
1488
1489void
1490showhide(Client *c) {
1491 if(!c)
1492 return;
1493 if(ISVISIBLE(c)) { /* show clients top down */
1494 XMoveWindow(dpy, c->win, c->x, c->y);
1495 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1496 resize(c, c->x, c->y, c->w, c->h, False);
1497 showhide(c->snext);
1498 }
1499 else { /* hide clients bottom up */
1500 showhide(c->snext);
1501 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1502 }
1503}
1504
1505
1506void
1507sigchld(int unused) {
1508 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1509 die("Can't install SIGCHLD handler");
1510 while(0 < waitpid(-1, NULL, WNOHANG));
1511}
1512
1513void
1514spawn(const Arg *arg) {
1515 if(fork() == 0) {
1516 if(dpy)
1517 close(ConnectionNumber(dpy));
1518 setsid();
1519 execvp(((char **)arg->v)[0], (char **)arg->v);
1520 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1521 perror(" failed");
1522 exit(0);
1523 }
1524}
1525
1526void
1527tag(const Arg *arg) {
1528 if(selmon->sel && arg->ui & TAGMASK) {
1529 selmon->sel->tags = arg->ui & TAGMASK;
1530 arrange();
1531 }
1532}
1533
1534void
1535tagmon(const Arg *arg) {
1536 if(!selmon->sel || !mons->next)
1537 return;
1538 sendmon(selmon->sel, dirtomon(arg->i));
1539}
1540
1541int
1542textnw(const char *text, unsigned int len) {
1543 XRectangle r;
1544
1545 if(dc.font.set) {
1546 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1547 return r.width;
1548 }
1549 return XTextWidth(dc.font.xfont, text, len);
1550}
1551
1552void
1553tile(Monitor *m) {
1554 int x, y, h, w, mw;
1555 unsigned int i, n;
1556 Client *c;
1557
1558 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1559 if(n == 0)
1560 return;
1561 /* master */
1562 c = nexttiled(m->clients);
1563 mw = m->mfact * m->ww;
1564 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1565 if(--n == 0)
1566 return;
1567 /* tile stack */
1568 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1569 y = m->wy;
1570 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1571 h = m->wh / n;
1572 if(h < bh)
1573 h = m->wh;
1574 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1575 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1576 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1577 if(h != m->wh)
1578 y = c->y + HEIGHT(c);
1579 }
1580}
1581
1582void
1583togglebar(const Arg *arg) {
1584 selmon->showbar = !selmon->showbar;
1585 updatebarpos(selmon);
1586 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1587 arrange();
1588}
1589
1590void
1591togglefloating(const Arg *arg) {
1592 if(!selmon->sel)
1593 return;
1594 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1595 if(selmon->sel->isfloating)
1596 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1597 selmon->sel->w, selmon->sel->h, False);
1598 arrange();
1599}
1600
1601void
1602toggletag(const Arg *arg) {
1603 unsigned int newtags;
1604
1605 if(!selmon->sel)
1606 return;
1607 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1608 if(newtags) {
1609 selmon->sel->tags = newtags;
1610 arrange();
1611 }
1612}
1613
1614void
1615toggleview(const Arg *arg) {
1616 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1617
1618 if(newtagset) {
1619 selmon->tagset[selmon->seltags] = newtagset;
1620 arrange();
1621 }
1622}
1623
1624void
1625unfocus(Client *c) {
1626 if(!c)
1627 return;
1628 grabbuttons(c, False);
1629 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1630 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1631}
1632
1633void
1634unmanage(Client *c, Bool destroyed) {
1635 XWindowChanges wc;
1636
1637 /* The server grab construct avoids race conditions. */
1638 detach(c);
1639 detachstack(c);
1640 if(!destroyed) {
1641 wc.border_width = c->oldbw;
1642 XGrabServer(dpy);
1643 XSetErrorHandler(xerrordummy);
1644 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1645 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1646 setclientstate(c, WithdrawnState);
1647 XSync(dpy, False);
1648 XSetErrorHandler(xerror);
1649 XUngrabServer(dpy);
1650 }
1651 free(c);
1652 focus(NULL);
1653 arrange();
1654}
1655
1656void
1657unmapnotify(XEvent *e) {
1658 Client *c;
1659 XUnmapEvent *ev = &e->xunmap;
1660
1661 if((c = wintoclient(ev->window)))
1662 unmanage(c, False);
1663}
1664
1665void
1666updatebars(void) {
1667 Monitor *m;
1668 XSetWindowAttributes wa;
1669
1670 wa.override_redirect = True;
1671 wa.background_pixmap = ParentRelative;
1672 wa.event_mask = ButtonPressMask|ExposureMask;
1673 for(m = mons; m; m = m->next) {
1674 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1675 CopyFromParent, DefaultVisual(dpy, screen),
1676 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1677 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1678 XMapRaised(dpy, m->barwin);
1679 }
1680}
1681
1682void
1683updatebarpos(Monitor *m) {
1684 m->wy = m->my;
1685 m->wh = m->mh;
1686 if(m->showbar) {
1687 m->wh -= bh;
1688 m->by = m->topbar ? m->wy : m->wy + m->wh;
1689 m->wy = m->topbar ? m->wy + bh : m->wy;
1690 }
1691 else
1692 m->by = -bh;
1693}
1694
1695void
1696updategeom(void) {
1697 int i, n = 1;
1698 Client *c;
1699 Monitor *newmons = NULL, *m = NULL, *tm;
1700
1701#ifdef XINERAMA
1702 int nn;
1703 XineramaScreenInfo *info = NULL;
1704
1705 if(XineramaIsActive(dpy))
1706 info = XineramaQueryScreens(dpy, &n);
1707 for(i = 1, nn = n; i < n; i++)
1708 if(info[i - 1].x_org == info[i].x_org && info[i - 1].y_org == info[i].y_org
1709 && info[i - 1].width == info[i].width && info[i - 1].height == info[i].height)
1710 --nn;
1711 n = nn; /* we only consider unique geometries as separate screens */
1712#endif /* XINERAMA */
1713 /* allocate monitor(s) for the new geometry setup */
1714 for(i = 0; i < n; i++) {
1715 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1716 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1717 m->next = newmons;
1718 newmons = m;
1719 }
1720 /* initialise monitor(s) */
1721#ifdef XINERAMA
1722 if(XineramaIsActive(dpy)) {
1723 for(i = 0, m = newmons; m; m = m->next, i++) {
1724 m->num = info[i].screen_number;
1725 m->mx = m->wx = info[i].x_org;
1726 m->my = m->wy = info[i].y_org;
1727 m->mw = m->ww = info[i].width;
1728 m->mh = m->wh = info[i].height;
1729 }
1730 XFree(info);
1731 }
1732 else
1733#endif /* XINERAMA */
1734 /* default monitor setup */
1735 {
1736 m->num = 0;
1737 m->mx = m->wx = 0;
1738 m->my = m->wy = 0;
1739 m->mw = m->ww = sw;
1740 m->mh = m->wh = sh;
1741 }
1742 /* bar geometry setup */
1743 for(m = newmons; m; m = m->next) {
1744 m->sel = m->stack = m->clients = NULL;
1745 m->seltags = 0;
1746 m->sellt = 0;
1747 m->tagset[0] = m->tagset[1] = 1;
1748 m->mfact = mfact;
1749 m->showbar = showbar;
1750 m->topbar = topbar;
1751 m->lt[0] = &layouts[0];
1752 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1753 m->ltsymbol = layouts[0].symbol;
1754 updatebarpos(m);
1755 }
1756 /* reassign left over clients of disappeared monitors */
1757 for(tm = mons; tm; tm = tm->next)
1758 while(tm->clients) {
1759 c = tm->clients;
1760 tm->clients = c->next;
1761 detachstack(c);
1762 c->mon = newmons;
1763 attach(c);
1764 attachstack(c);
1765 }
1766 /* select focused monitor */
1767 cleanupmons();
1768 selmon = mons = newmons;
1769 selmon = wintomon(root);
1770}
1771
1772void
1773updatenumlockmask(void) {
1774 unsigned int i, j;
1775 XModifierKeymap *modmap;
1776
1777 numlockmask = 0;
1778 modmap = XGetModifierMapping(dpy);
1779 for(i = 0; i < 8; i++)
1780 for(j = 0; j < modmap->max_keypermod; j++)
1781 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1782 == XKeysymToKeycode(dpy, XK_Num_Lock))
1783 numlockmask = (1 << i);
1784 XFreeModifiermap(modmap);
1785}
1786
1787void
1788updatesizehints(Client *c) {
1789 long msize;
1790 XSizeHints size;
1791
1792 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1793 /* size is uninitialized, ensure that size.flags aren't used */
1794 size.flags = PSize;
1795 if(size.flags & PBaseSize) {
1796 c->basew = size.base_width;
1797 c->baseh = size.base_height;
1798 }
1799 else if(size.flags & PMinSize) {
1800 c->basew = size.min_width;
1801 c->baseh = size.min_height;
1802 }
1803 else
1804 c->basew = c->baseh = 0;
1805 if(size.flags & PResizeInc) {
1806 c->incw = size.width_inc;
1807 c->inch = size.height_inc;
1808 }
1809 else
1810 c->incw = c->inch = 0;
1811 if(size.flags & PMaxSize) {
1812 c->maxw = size.max_width;
1813 c->maxh = size.max_height;
1814 }
1815 else
1816 c->maxw = c->maxh = 0;
1817 if(size.flags & PMinSize) {
1818 c->minw = size.min_width;
1819 c->minh = size.min_height;
1820 }
1821 else if(size.flags & PBaseSize) {
1822 c->minw = size.base_width;
1823 c->minh = size.base_height;
1824 }
1825 else
1826 c->minw = c->minh = 0;
1827 if(size.flags & PAspect) {
1828 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1829 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1830 }
1831 else
1832 c->maxa = c->mina = 0.0;
1833 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1834 && c->maxw == c->minw && c->maxh == c->minh);
1835}
1836
1837void
1838updatetitle(Client *c) {
1839 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1840 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1841 if(c->name[0] == '\0') /* hack to mark broken clients */
1842 strcpy(c->name, broken);
1843}
1844
1845void
1846updatestatus(void) {
1847 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1848 strcpy(stext, "dwm-"VERSION);
1849 drawbar(selmon);
1850}
1851
1852void
1853updatewmhints(Client *c) {
1854 XWMHints *wmh;
1855
1856 if((wmh = XGetWMHints(dpy, c->win))) {
1857 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1858 wmh->flags &= ~XUrgencyHint;
1859 XSetWMHints(dpy, c->win, wmh);
1860 }
1861 else
1862 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1863 XFree(wmh);
1864 }
1865}
1866
1867void
1868view(const Arg *arg) {
1869 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1870 return;
1871 selmon->seltags ^= 1; /* toggle sel tagset */
1872 if(arg->ui & TAGMASK)
1873 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1874 arrange();
1875}
1876
1877Client *
1878wintoclient(Window w) {
1879 Client *c;
1880 Monitor *m;
1881
1882 for(m = mons; m; m = m->next)
1883 for(c = m->clients; c; c = c->next)
1884 if(c->win == w)
1885 return c;
1886 return NULL;
1887}
1888
1889Monitor *
1890wintomon(Window w) {
1891 int x, y;
1892 Client *c;
1893 Monitor *m;
1894
1895 if(w == root && getrootptr(&x, &y))
1896 return ptrtomon(x, y);
1897 for(m = mons; m; m = m->next)
1898 if(w == m->barwin)
1899 return m;
1900 if((c = wintoclient(w)))
1901 return c->mon;
1902 return selmon;
1903}
1904
1905/* There's no way to check accesses to destroyed windows, thus those cases are
1906 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1907 * default error handler, which may call exit. */
1908int
1909xerror(Display *dpy, XErrorEvent *ee) {
1910 if(ee->error_code == BadWindow
1911 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1912 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1913 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1914 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1915 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1916 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1917 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1918 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1919 return 0;
1920 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1921 ee->request_code, ee->error_code);
1922 return xerrorxlib(dpy, ee); /* may call exit */
1923}
1924
1925int
1926xerrordummy(Display *dpy, XErrorEvent *ee) {
1927 return 0;
1928}
1929
1930/* Startup Error handler to check if another window manager
1931 * is already running. */
1932int
1933xerrorstart(Display *dpy, XErrorEvent *ee) {
1934 otherwm = True;
1935 return -1;
1936}
1937
1938void
1939zoom(const Arg *arg) {
1940 Client *c = selmon->sel;
1941
1942 if(!selmon->lt[selmon->sellt]->arrange
1943 || selmon->lt[selmon->sellt]->arrange == monocle
1944 || (selmon->sel && selmon->sel->isfloating))
1945 return;
1946 if(c == nexttiled(selmon->clients))
1947 if(!c || !(c = nexttiled(c->next)))
1948 return;
1949 detach(c);
1950 attach(c);
1951 focus(c);
1952 arrange();
1953}
1954
1955int
1956main(int argc, char *argv[]) {
1957 if(argc == 2 && !strcmp("-v", argv[1]))
1958 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1959 else if(argc != 1)
1960 die("usage: dwm [-v]\n");
1961 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1962 fputs("warning: no locale support\n", stderr);
1963 if(!(dpy = XOpenDisplay(NULL)))
1964 die("dwm: cannot open display\n");
1965 checkotherwm();
1966 setup();
1967 scan();
1968 run();
1969 cleanup();
1970 XCloseDisplay(dpy);
1971 return 0;
1972}