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 Bool 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 if(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}
549
550void
551configurerequest(XEvent *e) {
552 Client *c;
553 Monitor *m;
554 XConfigureRequestEvent *ev = &e->xconfigurerequest;
555 XWindowChanges wc;
556
557 if((c = wintoclient(ev->window))) {
558 if(ev->value_mask & CWBorderWidth)
559 c->bw = ev->border_width;
560 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
561 m = c->mon;
562 if(ev->value_mask & CWX)
563 c->x = m->mx + ev->x;
564 if(ev->value_mask & CWY)
565 c->y = m->my + ev->y;
566 if(ev->value_mask & CWWidth)
567 c->w = ev->width;
568 if(ev->value_mask & CWHeight)
569 c->h = ev->height;
570 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
571 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
572 if((c->y + c->h) > m->my + m->mh && c->isfloating)
573 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
574 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
575 configure(c);
576 if(ISVISIBLE(c))
577 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
578 }
579 else
580 configure(c);
581 }
582 else {
583 wc.x = ev->x;
584 wc.y = ev->y;
585 wc.width = ev->width;
586 wc.height = ev->height;
587 wc.border_width = ev->border_width;
588 wc.sibling = ev->above;
589 wc.stack_mode = ev->detail;
590 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
591 }
592 XSync(dpy, False);
593}
594
595void
596destroynotify(XEvent *e) {
597 Client *c;
598 XDestroyWindowEvent *ev = &e->xdestroywindow;
599
600 if((c = wintoclient(ev->window)))
601 unmanage(c, True);
602}
603
604void
605detach(Client *c) {
606 Client **tc;
607
608 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
609 *tc = c->next;
610}
611
612void
613detachstack(Client *c) {
614 Client **tc, *t;
615
616 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
617 *tc = c->snext;
618
619 if(c == c->mon->sel) {
620 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
621 c->mon->sel = t;
622 }
623}
624
625void
626die(const char *errstr, ...) {
627 va_list ap;
628
629 va_start(ap, errstr);
630 vfprintf(stderr, errstr, ap);
631 va_end(ap);
632 exit(EXIT_FAILURE);
633}
634
635Monitor *
636dirtomon(int dir) {
637 Monitor *m = NULL;
638
639 if(dir > 0) {
640 if(!(m = selmon->next))
641 m = mons;
642 }
643 else {
644 if(selmon == mons)
645 for(m = mons; m->next; m = m->next);
646 else
647 for(m = mons; m->next != selmon; m = m->next);
648 }
649 return m;
650}
651
652void
653drawbar(Monitor *m) {
654 int x;
655 unsigned int i, occ = 0, urg = 0;
656 unsigned long *col;
657 Client *c;
658
659 for(c = m->clients; c; c = c->next) {
660 occ |= c->tags;
661 if(c->isurgent)
662 urg |= c->tags;
663 }
664 dc.x = 0;
665 for(i = 0; i < LENGTH(tags); i++) {
666 dc.w = TEXTW(tags[i]);
667 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
668 drawtext(tags[i], col, urg & 1 << i);
669 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
670 occ & 1 << i, urg & 1 << i, col);
671 dc.x += dc.w;
672 }
673 dc.w = blw = TEXTW(m->ltsymbol);
674 drawtext(m->ltsymbol, dc.norm, False);
675 dc.x += dc.w;
676 x = dc.x;
677 if(m == selmon) { /* status is only drawn on selected monitor */
678 dc.w = TEXTW(stext);
679 dc.x = m->ww - dc.w;
680 if(dc.x < x) {
681 dc.x = x;
682 dc.w = m->ww - x;
683 }
684 drawtext(stext, dc.norm, False);
685 }
686 else
687 dc.x = m->ww;
688 if((dc.w = dc.x - x) > bh) {
689 dc.x = x;
690 if(m->sel) {
691 col = m == selmon ? dc.sel : dc.norm;
692 drawtext(m->sel->name, col, False);
693 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
694 }
695 else
696 drawtext(NULL, dc.norm, False);
697 }
698 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
699 XSync(dpy, False);
700}
701
702void
703drawbars(void) {
704 Monitor *m;
705
706 for(m = mons; m; m = m->next)
707 drawbar(m);
708}
709
710void
711drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
712 int x;
713 XGCValues gcv;
714 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
715
716 gcv.foreground = col[invert ? ColBG : ColFG];
717 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
718 x = (dc.font.ascent + dc.font.descent + 2) / 4;
719 r.x = dc.x + 1;
720 r.y = dc.y + 1;
721 if(filled) {
722 r.width = r.height = x + 1;
723 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
724 }
725 else if(empty) {
726 r.width = r.height = x;
727 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
728 }
729}
730
731void
732drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
733 char buf[256];
734 int i, x, y, h, len, olen;
735 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
736
737 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
738 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
739 if(!text)
740 return;
741 olen = strlen(text);
742 h = dc.font.ascent + dc.font.descent;
743 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
744 x = dc.x + (h / 2);
745 /* shorten text if necessary */
746 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
747 if(!len)
748 return;
749 memcpy(buf, text, len);
750 if(len < olen)
751 for(i = len; i && i > len - 3; buf[--i] = '.');
752 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
753 if(dc.font.set)
754 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
755 else
756 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
757}
758
759void
760enternotify(XEvent *e) {
761 Client *c;
762 Monitor *m;
763 XCrossingEvent *ev = &e->xcrossing;
764
765 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
766 return;
767 if((m = wintomon(ev->window)) && m != selmon) {
768 unfocus(selmon->sel);
769 selmon = m;
770 }
771 if((c = wintoclient(ev->window)))
772 focus(c);
773 else
774 focus(NULL);
775}
776
777void
778expose(XEvent *e) {
779 Monitor *m;
780 XExposeEvent *ev = &e->xexpose;
781
782 if(ev->count == 0 && (m = wintomon(ev->window)))
783 drawbar(m);
784}
785
786void
787focus(Client *c) {
788 if(!c || !ISVISIBLE(c))
789 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
790 if(selmon->sel)
791 unfocus(selmon->sel);
792 if(c) {
793 if(c->mon != selmon)
794 selmon = c->mon;
795 if(c->isurgent)
796 clearurgent(c);
797 detachstack(c);
798 attachstack(c);
799 grabbuttons(c, True);
800 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
801 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
802 }
803 else
804 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
805 selmon->sel = c;
806 drawbars();
807}
808
809void
810focusin(XEvent *e) { /* there are some broken focus acquiring clients */
811 XFocusChangeEvent *ev = &e->xfocus;
812
813 if(selmon->sel && ev->window != selmon->sel->win)
814 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
815}
816
817void
818focusmon(const Arg *arg) {
819 Monitor *m = NULL;
820
821 if(!mons->next)
822 return;
823 m = dirtomon(arg->i);
824 unfocus(selmon->sel);
825 selmon = m;
826 focus(NULL);
827}
828
829void
830focusstack(const Arg *arg) {
831 Client *c = NULL, *i;
832
833 if(!selmon->sel)
834 return;
835 if(arg->i > 0) {
836 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
837 if(!c)
838 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
839 }
840 else {
841 for(i = selmon->clients; i != selmon->sel; i = i->next)
842 if(ISVISIBLE(i))
843 c = i;
844 if(!c)
845 for(; i; i = i->next)
846 if(ISVISIBLE(i))
847 c = i;
848 }
849 if(c) {
850 focus(c);
851 restack(selmon);
852 }
853}
854
855unsigned long
856getcolor(const char *colstr) {
857 Colormap cmap = DefaultColormap(dpy, screen);
858 XColor color;
859
860 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
861 die("error, cannot allocate color '%s'\n", colstr);
862 return color.pixel;
863}
864
865Bool
866getrootptr(int *x, int *y) {
867 int di;
868 unsigned int dui;
869 Window dummy;
870
871 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
872}
873
874long
875getstate(Window w) {
876 int format, status;
877 long result = -1;
878 unsigned char *p = NULL;
879 unsigned long n, extra;
880 Atom real;
881
882 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
883 &real, &format, &n, &extra, (unsigned char **)&p);
884 if(status != Success)
885 return -1;
886 if(n != 0)
887 result = *p;
888 XFree(p);
889 return result;
890}
891
892Bool
893gettextprop(Window w, Atom atom, char *text, unsigned int size) {
894 char **list = NULL;
895 int n;
896 XTextProperty name;
897
898 if(!text || size == 0)
899 return False;
900 text[0] = '\0';
901 XGetTextProperty(dpy, w, &name, atom);
902 if(!name.nitems)
903 return False;
904 if(name.encoding == XA_STRING)
905 strncpy(text, (char *)name.value, size - 1);
906 else {
907 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
908 strncpy(text, *list, size - 1);
909 XFreeStringList(list);
910 }
911 }
912 text[size - 1] = '\0';
913 XFree(name.value);
914 return True;
915}
916
917void
918grabbuttons(Client *c, Bool focused) {
919 updatenumlockmask();
920 {
921 unsigned int i, j;
922 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
923 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
924 if(focused) {
925 for(i = 0; i < LENGTH(buttons); i++)
926 if(buttons[i].click == ClkClientWin)
927 for(j = 0; j < LENGTH(modifiers); j++)
928 XGrabButton(dpy, buttons[i].button,
929 buttons[i].mask | modifiers[j],
930 c->win, False, BUTTONMASK,
931 GrabModeAsync, GrabModeSync, None, None);
932 }
933 else
934 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
935 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
936 }
937}
938
939void
940grabkeys(void) {
941 updatenumlockmask();
942 {
943 unsigned int i, j;
944 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
945 KeyCode code;
946
947 XUngrabKey(dpy, AnyKey, AnyModifier, root);
948 for(i = 0; i < LENGTH(keys); i++) {
949 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
950 for(j = 0; j < LENGTH(modifiers); j++)
951 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
952 True, GrabModeAsync, GrabModeAsync);
953 }
954 }
955}
956
957void
958initfont(const char *fontstr) {
959 char *def, **missing;
960 int i, n;
961
962 missing = NULL;
963 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
964 if(missing) {
965 while(n--)
966 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
967 XFreeStringList(missing);
968 }
969 if(dc.font.set) {
970 XFontSetExtents *font_extents;
971 XFontStruct **xfonts;
972 char **font_names;
973
974 dc.font.ascent = dc.font.descent = 0;
975 font_extents = XExtentsOfFontSet(dc.font.set);
976 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
977 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
978 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
979 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
980 xfonts++;
981 }
982 }
983 else {
984 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
985 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
986 die("error, cannot load font: '%s'\n", fontstr);
987 dc.font.ascent = dc.font.xfont->ascent;
988 dc.font.descent = dc.font.xfont->descent;
989 }
990 dc.font.height = dc.font.ascent + dc.font.descent;
991}
992
993Bool
994isprotodel(Client *c) {
995 int i, n;
996 Atom *protocols;
997 Bool ret = False;
998
999 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1000 for(i = 0; !ret && i < n; i++)
1001 if(protocols[i] == wmatom[WMDelete])
1002 ret = True;
1003 XFree(protocols);
1004 }
1005 return ret;
1006}
1007
1008void
1009keypress(XEvent *e) {
1010 unsigned int i;
1011 KeySym keysym;
1012 XKeyEvent *ev;
1013
1014 ev = &e->xkey;
1015 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1016 for(i = 0; i < LENGTH(keys); i++)
1017 if(keysym == keys[i].keysym
1018 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1019 && keys[i].func)
1020 keys[i].func(&(keys[i].arg));
1021}
1022
1023void
1024killclient(const Arg *arg) {
1025 XEvent ev;
1026
1027 if(!selmon->sel)
1028 return;
1029 if(isprotodel(selmon->sel)) {
1030 ev.type = ClientMessage;
1031 ev.xclient.window = selmon->sel->win;
1032 ev.xclient.message_type = wmatom[WMProtocols];
1033 ev.xclient.format = 32;
1034 ev.xclient.data.l[0] = wmatom[WMDelete];
1035 ev.xclient.data.l[1] = CurrentTime;
1036 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1037 }
1038 else {
1039 XGrabServer(dpy);
1040 XSetErrorHandler(xerrordummy);
1041 XSetCloseDownMode(dpy, DestroyAll);
1042 XKillClient(dpy, selmon->sel->win);
1043 XSync(dpy, False);
1044 XSetErrorHandler(xerror);
1045 XUngrabServer(dpy);
1046 }
1047}
1048
1049void
1050manage(Window w, XWindowAttributes *wa) {
1051 static Client cz;
1052 Client *c, *t = NULL;
1053 Window trans = None;
1054 XWindowChanges wc;
1055
1056 if(!(c = malloc(sizeof(Client))))
1057 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1058 *c = cz;
1059 c->win = w;
1060 updatetitle(c);
1061 if(XGetTransientForHint(dpy, w, &trans))
1062 t = wintoclient(trans);
1063 if(t) {
1064 c->mon = t->mon;
1065 c->tags = t->tags;
1066 }
1067 else {
1068 c->mon = selmon;
1069 applyrules(c);
1070 }
1071 /* geometry */
1072 c->x = wa->x + c->mon->wx;
1073 c->y = wa->y + c->mon->wy;
1074 c->w = wa->width;
1075 c->h = wa->height;
1076 c->oldbw = wa->border_width;
1077 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1078 c->x = c->mon->mx;
1079 c->y = c->mon->my;
1080 c->bw = 0;
1081 }
1082 else {
1083 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1084 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1085 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1086 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1087 c->x = MAX(c->x, c->mon->mx);
1088 /* only fix client y-offset, if the client center might cover the bar */
1089 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1090 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1091 c->bw = borderpx;
1092 }
1093 wc.border_width = c->bw;
1094 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1095 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1096 configure(c); /* propagates border_width, if size doesn't change */
1097 updatesizehints(c);
1098 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1099 grabbuttons(c, False);
1100 if(!c->isfloating)
1101 c->isfloating = trans != None || c->isfixed;
1102 if(c->isfloating)
1103 XRaiseWindow(dpy, c->win);
1104 attach(c);
1105 attachstack(c);
1106 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1107 XMapWindow(dpy, c->win);
1108 setclientstate(c, NormalState);
1109 arrange();
1110}
1111
1112void
1113mappingnotify(XEvent *e) {
1114 XMappingEvent *ev = &e->xmapping;
1115
1116 XRefreshKeyboardMapping(ev);
1117 if(ev->request == MappingKeyboard)
1118 grabkeys();
1119}
1120
1121void
1122maprequest(XEvent *e) {
1123 static XWindowAttributes wa;
1124 XMapRequestEvent *ev = &e->xmaprequest;
1125
1126 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1127 return;
1128 if(wa.override_redirect)
1129 return;
1130 if(!wintoclient(ev->window))
1131 manage(ev->window, &wa);
1132}
1133
1134void
1135monocle(Monitor *m) {
1136 static char ntext[8];
1137 unsigned int n = 0;
1138 Client *c;
1139
1140 for(c = m->clients; c; c = c->next)
1141 if(ISVISIBLE(c))
1142 n++;
1143 if(n > 0) { /* override layout symbol */
1144 snprintf(ntext, sizeof ntext, "[%d]", n);
1145 m->ltsymbol = ntext;
1146 }
1147 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1148 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1149}
1150
1151void
1152movemouse(const Arg *arg) {
1153 int x, y, ocx, ocy, nx, ny;
1154 Client *c;
1155 Monitor *m;
1156 XEvent ev;
1157
1158 if(!(c = selmon->sel))
1159 return;
1160 restack(selmon);
1161 ocx = c->x;
1162 ocy = c->y;
1163 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1164 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1165 return;
1166 if(!getrootptr(&x, &y))
1167 return;
1168 do {
1169 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1170 switch (ev.type) {
1171 case ConfigureRequest:
1172 case Expose:
1173 case MapRequest:
1174 handler[ev.type](&ev);
1175 break;
1176 case MotionNotify:
1177 nx = ocx + (ev.xmotion.x - x);
1178 ny = ocy + (ev.xmotion.y - y);
1179 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1180 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1181 if(abs(selmon->wx - nx) < snap)
1182 nx = selmon->wx;
1183 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1184 nx = selmon->wx + selmon->ww - WIDTH(c);
1185 if(abs(selmon->wy - ny) < snap)
1186 ny = selmon->wy;
1187 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1188 ny = selmon->wy + selmon->wh - HEIGHT(c);
1189 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1190 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1191 togglefloating(NULL);
1192 }
1193 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1194 resize(c, nx, ny, c->w, c->h, True);
1195 break;
1196 }
1197 } while(ev.type != ButtonRelease);
1198 XUngrabPointer(dpy, CurrentTime);
1199 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1200 sendmon(c, m);
1201 selmon = m;
1202 focus(NULL);
1203 }
1204}
1205
1206Client *
1207nexttiled(Client *c) {
1208 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1209 return c;
1210}
1211
1212Monitor *
1213ptrtomon(int x, int y) {
1214 Monitor *m;
1215
1216 for(m = mons; m; m = m->next)
1217 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1218 return m;
1219 return selmon;
1220}
1221
1222void
1223propertynotify(XEvent *e) {
1224 Client *c;
1225 Window trans;
1226 XPropertyEvent *ev = &e->xproperty;
1227
1228 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1229 updatestatus();
1230 else if(ev->state == PropertyDelete)
1231 return; /* ignore */
1232 else if((c = wintoclient(ev->window))) {
1233 switch (ev->atom) {
1234 default: break;
1235 case XA_WM_TRANSIENT_FOR:
1236 XGetTransientForHint(dpy, c->win, &trans);
1237 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1238 arrange();
1239 break;
1240 case XA_WM_NORMAL_HINTS:
1241 updatesizehints(c);
1242 break;
1243 case XA_WM_HINTS:
1244 updatewmhints(c);
1245 drawbars();
1246 break;
1247 }
1248 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1249 updatetitle(c);
1250 if(c == c->mon->sel)
1251 drawbar(c->mon);
1252 }
1253 }
1254}
1255
1256void
1257quit(const Arg *arg) {
1258 running = False;
1259}
1260
1261void
1262resize(Client *c, int x, int y, int w, int h, Bool interact) {
1263 XWindowChanges wc;
1264
1265 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1266 c->x = wc.x = x;
1267 c->y = wc.y = y;
1268 c->w = wc.width = w;
1269 c->h = wc.height = h;
1270 wc.border_width = c->bw;
1271 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1272 configure(c);
1273 XSync(dpy, False);
1274 }
1275}
1276
1277void
1278resizemouse(const Arg *arg) {
1279 int ocx, ocy;
1280 int nw, nh;
1281 Client *c;
1282 Monitor *m;
1283 XEvent ev;
1284
1285 if(!(c = selmon->sel))
1286 return;
1287 restack(selmon);
1288 ocx = c->x;
1289 ocy = c->y;
1290 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1291 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1292 return;
1293 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1294 do {
1295 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1296 switch(ev.type) {
1297 case ConfigureRequest:
1298 case Expose:
1299 case MapRequest:
1300 handler[ev.type](&ev);
1301 break;
1302 case MotionNotify:
1303 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1304 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1305 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1306 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh)
1307 {
1308 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1309 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1310 togglefloating(NULL);
1311 }
1312 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1313 resize(c, c->x, c->y, nw, nh, True);
1314 break;
1315 }
1316 } while(ev.type != ButtonRelease);
1317 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1318 XUngrabPointer(dpy, CurrentTime);
1319 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1320 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1321 sendmon(c, m);
1322 selmon = m;
1323 focus(NULL);
1324 }
1325}
1326
1327void
1328restack(Monitor *m) {
1329 Client *c;
1330 XEvent ev;
1331 XWindowChanges wc;
1332
1333 drawbars();
1334 if(!m->sel)
1335 return;
1336 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1337 XRaiseWindow(dpy, m->sel->win);
1338 if(m->lt[m->sellt]->arrange) {
1339 wc.stack_mode = Below;
1340 wc.sibling = m->barwin;
1341 for(c = m->stack; c; c = c->snext)
1342 if(!c->isfloating && ISVISIBLE(c)) {
1343 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1344 wc.sibling = c->win;
1345 }
1346 }
1347 XSync(dpy, False);
1348 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1349}
1350
1351void
1352run(void) {
1353 XEvent ev;
1354
1355 /* main event loop */
1356 XSync(dpy, False);
1357 while(running && !XNextEvent(dpy, &ev))
1358 if(handler[ev.type])
1359 handler[ev.type](&ev); /* call handler */
1360}
1361
1362void
1363scan(void) {
1364 unsigned int i, num;
1365 Window d1, d2, *wins = NULL;
1366 XWindowAttributes wa;
1367
1368 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1369 for(i = 0; i < num; i++) {
1370 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1371 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1372 continue;
1373 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1374 manage(wins[i], &wa);
1375 }
1376 for(i = 0; i < num; i++) { /* now the transients */
1377 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1378 continue;
1379 if(XGetTransientForHint(dpy, wins[i], &d1)
1380 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1381 manage(wins[i], &wa);
1382 }
1383 if(wins)
1384 XFree(wins);
1385 }
1386}
1387
1388void
1389sendmon(Client *c, Monitor *m) {
1390 if(c->mon == m)
1391 return;
1392 unfocus(c);
1393 detach(c);
1394 detachstack(c);
1395 c->mon = m;
1396 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1397 attach(c);
1398 attachstack(c);
1399 focus(NULL);
1400 arrange();
1401}
1402
1403void
1404setclientstate(Client *c, long state) {
1405 long data[] = { state, None };
1406
1407 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1408 PropModeReplace, (unsigned char *)data, 2);
1409}
1410
1411void
1412setlayout(const Arg *arg) {
1413 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1414 selmon->sellt ^= 1;
1415 if(arg && arg->v)
1416 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1417 if(selmon->sel)
1418 arrange();
1419 else
1420 drawbars();
1421}
1422
1423/* arg > 1.0 will set mfact absolutly */
1424void
1425setmfact(const Arg *arg) {
1426 float f;
1427
1428 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1429 return;
1430 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1431 if(f < 0.1 || f > 0.9)
1432 return;
1433 selmon->mfact = f;
1434 arrange();
1435}
1436
1437void
1438setup(void) {
1439 XSetWindowAttributes wa;
1440
1441 /* clean up any zombies immediately */
1442 sigchld(0);
1443
1444 /* init screen */
1445 screen = DefaultScreen(dpy);
1446 root = RootWindow(dpy, screen);
1447 initfont(font);
1448 sw = DisplayWidth(dpy, screen);
1449 sh = DisplayHeight(dpy, screen);
1450 bh = dc.h = dc.font.height + 2;
1451 updategeom();
1452 /* init atoms */
1453 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1454 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1455 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1456 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1457 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1458 /* init cursors */
1459 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1460 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1461 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1462 /* init appearance */
1463 dc.norm[ColBorder] = getcolor(normbordercolor);
1464 dc.norm[ColBG] = getcolor(normbgcolor);
1465 dc.norm[ColFG] = getcolor(normfgcolor);
1466 dc.sel[ColBorder] = getcolor(selbordercolor);
1467 dc.sel[ColBG] = getcolor(selbgcolor);
1468 dc.sel[ColFG] = getcolor(selfgcolor);
1469 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1470 dc.gc = XCreateGC(dpy, root, 0, NULL);
1471 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1472 if(!dc.font.set)
1473 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1474 /* init bars */
1475 updatebars();
1476 updatestatus();
1477 /* EWMH support per view */
1478 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1479 PropModeReplace, (unsigned char *) netatom, NetLast);
1480 /* select for events */
1481 wa.cursor = cursor[CurNormal];
1482 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1483 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1484 |PropertyChangeMask;
1485 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1486 XSelectInput(dpy, root, wa.event_mask);
1487 grabkeys();
1488}
1489
1490void
1491showhide(Client *c) {
1492 if(!c)
1493 return;
1494 if(ISVISIBLE(c)) { /* show clients top down */
1495 XMoveWindow(dpy, c->win, c->x, c->y);
1496 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1497 resize(c, c->x, c->y, c->w, c->h, False);
1498 showhide(c->snext);
1499 }
1500 else { /* hide clients bottom up */
1501 showhide(c->snext);
1502 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1503 }
1504}
1505
1506
1507void
1508sigchld(int unused) {
1509 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1510 die("Can't install SIGCHLD handler");
1511 while(0 < waitpid(-1, NULL, WNOHANG));
1512}
1513
1514void
1515spawn(const Arg *arg) {
1516 if(fork() == 0) {
1517 if(dpy)
1518 close(ConnectionNumber(dpy));
1519 setsid();
1520 execvp(((char **)arg->v)[0], (char **)arg->v);
1521 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1522 perror(" failed");
1523 exit(0);
1524 }
1525}
1526
1527void
1528tag(const Arg *arg) {
1529 if(selmon->sel && arg->ui & TAGMASK) {
1530 selmon->sel->tags = arg->ui & TAGMASK;
1531 arrange();
1532 }
1533}
1534
1535void
1536tagmon(const Arg *arg) {
1537 if(!selmon->sel || !mons->next)
1538 return;
1539 sendmon(selmon->sel, dirtomon(arg->i));
1540}
1541
1542int
1543textnw(const char *text, unsigned int len) {
1544 XRectangle r;
1545
1546 if(dc.font.set) {
1547 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1548 return r.width;
1549 }
1550 return XTextWidth(dc.font.xfont, text, len);
1551}
1552
1553void
1554tile(Monitor *m) {
1555 int x, y, h, w, mw;
1556 unsigned int i, n;
1557 Client *c;
1558
1559 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1560 if(n == 0)
1561 return;
1562 /* master */
1563 c = nexttiled(m->clients);
1564 mw = m->mfact * m->ww;
1565 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1566 if(--n == 0)
1567 return;
1568 /* tile stack */
1569 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1570 y = m->wy;
1571 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1572 h = m->wh / n;
1573 if(h < bh)
1574 h = m->wh;
1575 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1576 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1577 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1578 if(h != m->wh)
1579 y = c->y + HEIGHT(c);
1580 }
1581}
1582
1583void
1584togglebar(const Arg *arg) {
1585 selmon->showbar = !selmon->showbar;
1586 updatebarpos(selmon);
1587 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1588 arrange();
1589}
1590
1591void
1592togglefloating(const Arg *arg) {
1593 if(!selmon->sel)
1594 return;
1595 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1596 if(selmon->sel->isfloating)
1597 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1598 selmon->sel->w, selmon->sel->h, False);
1599 arrange();
1600}
1601
1602void
1603toggletag(const Arg *arg) {
1604 unsigned int newtags;
1605
1606 if(!selmon->sel)
1607 return;
1608 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1609 if(newtags) {
1610 selmon->sel->tags = newtags;
1611 arrange();
1612 }
1613}
1614
1615void
1616toggleview(const Arg *arg) {
1617 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1618
1619 if(newtagset) {
1620 selmon->tagset[selmon->seltags] = newtagset;
1621 arrange();
1622 }
1623}
1624
1625void
1626unfocus(Client *c) {
1627 if(!c)
1628 return;
1629 grabbuttons(c, False);
1630 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1631 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1632}
1633
1634void
1635unmanage(Client *c, Bool destroyed) {
1636 XWindowChanges wc;
1637
1638 /* The server grab construct avoids race conditions. */
1639 detach(c);
1640 detachstack(c);
1641 if(!destroyed) {
1642 wc.border_width = c->oldbw;
1643 XGrabServer(dpy);
1644 XSetErrorHandler(xerrordummy);
1645 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1646 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1647 setclientstate(c, WithdrawnState);
1648 XSync(dpy, False);
1649 XSetErrorHandler(xerror);
1650 XUngrabServer(dpy);
1651 }
1652 free(c);
1653 focus(NULL);
1654 arrange();
1655}
1656
1657void
1658unmapnotify(XEvent *e) {
1659 Client *c;
1660 XUnmapEvent *ev = &e->xunmap;
1661
1662 if((c = wintoclient(ev->window)))
1663 unmanage(c, False);
1664}
1665
1666void
1667updatebars(void) {
1668 Monitor *m;
1669 XSetWindowAttributes wa;
1670
1671 wa.override_redirect = True;
1672 wa.background_pixmap = ParentRelative;
1673 wa.event_mask = ButtonPressMask|ExposureMask;
1674 for(m = mons; m; m = m->next) {
1675 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1676 CopyFromParent, DefaultVisual(dpy, screen),
1677 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1678 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1679 XMapRaised(dpy, m->barwin);
1680 }
1681}
1682
1683void
1684updatebarpos(Monitor *m) {
1685 m->wy = m->my;
1686 m->wh = m->mh;
1687 if(m->showbar) {
1688 m->wh -= bh;
1689 m->by = m->topbar ? m->wy : m->wy + m->wh;
1690 m->wy = m->topbar ? m->wy + bh : m->wy;
1691 }
1692 else
1693 m->by = -bh;
1694}
1695
1696Bool
1697updategeom(void) {
1698 int i, j, nn = 1, n = 1;
1699 Client *c;
1700 Monitor *newmons = NULL, *m = NULL, *tm;
1701
1702 /* TODO:
1703 * This function needs to be seriously re-designed:
1704 *
1705 * #ifdef XINERAMA
1706 * 1. Determine number of already existing monitors n
1707 * 2. Determine number of monitors Xinerama reports nn
1708 * 3. if(n <= nn) {
1709 * if(n < nn) {
1710 * append nn-n monitors to current struct
1711 * flag dirty
1712 * }
1713 * for(i = 0; i < nn; i++) {
1714 * if(oldgeom != newgeom) {
1715 * apply newgeom;
1716 * flag dirty;
1717 * }
1718 * }
1719 * }
1720 * else {
1721 * detach all clients
1722 * destroy current monitor struct
1723 * create new monitor struct
1724 * attach all clients to first monitor
1725 * flag dirty;
1726 * }
1727 * return dirty flag to caller
1728 * if dirty is seen by caller:
1729 * re-arrange bars/pixmaps
1730 * arrange()
1731 * #else
1732 * don't share between XINERAMA and non-XINERAMA handling if it gets
1733 * too ugly
1734 * #endif
1735 */
1736#ifdef XINERAMA
1737 XineramaScreenInfo *info = NULL;
1738 Bool *flags = NULL;
1739
1740 if(XineramaIsActive(dpy))
1741 info = XineramaQueryScreens(dpy, &n);
1742 flags = (Bool *)malloc(sizeof(Bool) * n);
1743 for(i = 0; i < n; i++)
1744 flags[i] = False;
1745 /* next double-loop seeks any combination of retrieved Xinerama info
1746 * with existing monitors, this is used to avoid unnecessary
1747 * re-allocations of monitor structs */
1748 for(i = 0, nn = n; i < n; i++)
1749 for(j = 0, m = mons; m; m = m->next, j++)
1750 if(!flags[j]) {
1751 if((flags[j] = (
1752 info[i].x_org == m->mx
1753 && info[i].y_org == m->my
1754 && info[i].width == m->mw
1755 && info[i].height == m->mh)
1756 ))
1757 --nn;
1758 }
1759 if(nn == 0) { /* no need to re-allocate monitors */
1760 j = 0;
1761 for(i = 0, m = mons; m; m = m->next, i++) {
1762 m->num = info[i].screen_number;
1763 if(info[i].x_org != m->mx
1764 || info[i].y_org != m->my
1765 || info[i].width != m->mw
1766 || info[i].height != m->mh)
1767 {
1768 m->mx = m->wx = info[i].x_org;
1769 m->my = m->wy = info[i].y_org;
1770 m->mw = m->ww = info[i].width;
1771 m->mh = m->wh = info[i].height;
1772 updatebarpos(m);
1773 j++;
1774 }
1775 }
1776 XFree(info);
1777 free(flags);
1778 return j > 0;
1779 }
1780 /* next algorithm only considers unique geometries as separate screens */
1781 for(i = 0; i < n; i++)
1782 flags[i] = False; /* used for ignoring certain monitors */
1783 for(i = 0, nn = n; i < n; i++)
1784 for(j = 0; j < n; j++)
1785 if(i != j && !flags[i]) {
1786 if((flags[i] = (
1787 info[i].x_org == info[j].x_org
1788 && info[i].y_org == info[j].y_org
1789 && info[i].width == info[j].width
1790 && info[i].height == info[j].height)
1791 ))
1792 --nn;
1793 }
1794#endif /* XINERAMA */
1795 /* allocate monitor(s) for the new geometry setup */
1796 for(i = 0; i < nn; i++) {
1797 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1798 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1799 m->next = newmons;
1800 newmons = m;
1801 }
1802 /* initialise monitor(s) */
1803#ifdef XINERAMA
1804 if(XineramaIsActive(dpy)) {
1805 for(i = 0, m = newmons; m && i < n; i++) {
1806 if(!flags[i]) { /* only use screens that aren't dublettes */
1807 m->num = info[i].screen_number;
1808 m->mx = m->wx = info[i].x_org;
1809 m->my = m->wy = info[i].y_org;
1810 m->mw = m->ww = info[i].width;
1811 m->mh = m->wh = info[i].height;
1812 m = m->next;
1813 }
1814 }
1815 XFree(info);
1816 free(flags);
1817 }
1818 else
1819#endif /* XINERAMA */
1820 /* default monitor setup */
1821 {
1822 m->num = 0;
1823 m->mx = m->wx = 0;
1824 m->my = m->wy = 0;
1825 m->mw = m->ww = sw;
1826 m->mh = m->wh = sh;
1827 }
1828 /* bar geometry setup */
1829 for(m = newmons; m; m = m->next) {
1830 m->sel = m->stack = m->clients = NULL;
1831 m->seltags = 0;
1832 m->sellt = 0;
1833 m->tagset[0] = m->tagset[1] = 1;
1834 m->mfact = mfact;
1835 m->showbar = showbar;
1836 m->topbar = topbar;
1837 m->lt[0] = &layouts[0];
1838 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1839 m->ltsymbol = layouts[0].symbol;
1840 updatebarpos(m);
1841 }
1842 /* reassign left over clients of disappeared monitors */
1843 for(tm = mons; tm; tm = tm->next)
1844 while(tm->clients) {
1845 c = tm->clients;
1846 tm->clients = c->next;
1847 detachstack(c);
1848 c->mon = newmons;
1849 attach(c);
1850 attachstack(c);
1851 }
1852 /* select focused monitor */
1853 cleanupmons();
1854 selmon = mons = newmons;
1855 selmon = wintomon(root);
1856 return True;
1857}
1858
1859void
1860updatenumlockmask(void) {
1861 unsigned int i, j;
1862 XModifierKeymap *modmap;
1863
1864 numlockmask = 0;
1865 modmap = XGetModifierMapping(dpy);
1866 for(i = 0; i < 8; i++)
1867 for(j = 0; j < modmap->max_keypermod; j++)
1868 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1869 == XKeysymToKeycode(dpy, XK_Num_Lock))
1870 numlockmask = (1 << i);
1871 XFreeModifiermap(modmap);
1872}
1873
1874void
1875updatesizehints(Client *c) {
1876 long msize;
1877 XSizeHints size;
1878
1879 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1880 /* size is uninitialized, ensure that size.flags aren't used */
1881 size.flags = PSize;
1882 if(size.flags & PBaseSize) {
1883 c->basew = size.base_width;
1884 c->baseh = size.base_height;
1885 }
1886 else if(size.flags & PMinSize) {
1887 c->basew = size.min_width;
1888 c->baseh = size.min_height;
1889 }
1890 else
1891 c->basew = c->baseh = 0;
1892 if(size.flags & PResizeInc) {
1893 c->incw = size.width_inc;
1894 c->inch = size.height_inc;
1895 }
1896 else
1897 c->incw = c->inch = 0;
1898 if(size.flags & PMaxSize) {
1899 c->maxw = size.max_width;
1900 c->maxh = size.max_height;
1901 }
1902 else
1903 c->maxw = c->maxh = 0;
1904 if(size.flags & PMinSize) {
1905 c->minw = size.min_width;
1906 c->minh = size.min_height;
1907 }
1908 else if(size.flags & PBaseSize) {
1909 c->minw = size.base_width;
1910 c->minh = size.base_height;
1911 }
1912 else
1913 c->minw = c->minh = 0;
1914 if(size.flags & PAspect) {
1915 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1916 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1917 }
1918 else
1919 c->maxa = c->mina = 0.0;
1920 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1921 && c->maxw == c->minw && c->maxh == c->minh);
1922}
1923
1924void
1925updatetitle(Client *c) {
1926 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1927 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1928 if(c->name[0] == '\0') /* hack to mark broken clients */
1929 strcpy(c->name, broken);
1930}
1931
1932void
1933updatestatus(void) {
1934 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1935 strcpy(stext, "dwm-"VERSION);
1936 drawbar(selmon);
1937}
1938
1939void
1940updatewmhints(Client *c) {
1941 XWMHints *wmh;
1942
1943 if((wmh = XGetWMHints(dpy, c->win))) {
1944 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1945 wmh->flags &= ~XUrgencyHint;
1946 XSetWMHints(dpy, c->win, wmh);
1947 }
1948 else
1949 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1950 XFree(wmh);
1951 }
1952}
1953
1954void
1955view(const Arg *arg) {
1956 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1957 return;
1958 selmon->seltags ^= 1; /* toggle sel tagset */
1959 if(arg->ui & TAGMASK)
1960 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1961 arrange();
1962}
1963
1964Client *
1965wintoclient(Window w) {
1966 Client *c;
1967 Monitor *m;
1968
1969 for(m = mons; m; m = m->next)
1970 for(c = m->clients; c; c = c->next)
1971 if(c->win == w)
1972 return c;
1973 return NULL;
1974}
1975
1976Monitor *
1977wintomon(Window w) {
1978 int x, y;
1979 Client *c;
1980 Monitor *m;
1981
1982 if(w == root && getrootptr(&x, &y))
1983 return ptrtomon(x, y);
1984 for(m = mons; m; m = m->next)
1985 if(w == m->barwin)
1986 return m;
1987 if((c = wintoclient(w)))
1988 return c->mon;
1989 return selmon;
1990}
1991
1992/* There's no way to check accesses to destroyed windows, thus those cases are
1993 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1994 * default error handler, which may call exit. */
1995int
1996xerror(Display *dpy, XErrorEvent *ee) {
1997 if(ee->error_code == BadWindow
1998 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1999 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2000 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2001 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2002 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2003 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2004 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2005 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2006 return 0;
2007 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2008 ee->request_code, ee->error_code);
2009 return xerrorxlib(dpy, ee); /* may call exit */
2010}
2011
2012int
2013xerrordummy(Display *dpy, XErrorEvent *ee) {
2014 return 0;
2015}
2016
2017/* Startup Error handler to check if another window manager
2018 * is already running. */
2019int
2020xerrorstart(Display *dpy, XErrorEvent *ee) {
2021 otherwm = True;
2022 return -1;
2023}
2024
2025void
2026zoom(const Arg *arg) {
2027 Client *c = selmon->sel;
2028
2029 if(!selmon->lt[selmon->sellt]->arrange
2030 || selmon->lt[selmon->sellt]->arrange == monocle
2031 || (selmon->sel && selmon->sel->isfloating))
2032 return;
2033 if(c == nexttiled(selmon->clients))
2034 if(!c || !(c = nexttiled(c->next)))
2035 return;
2036 detach(c);
2037 attach(c);
2038 focus(c);
2039 arrange();
2040}
2041
2042int
2043main(int argc, char *argv[]) {
2044 if(argc == 2 && !strcmp("-v", argv[1]))
2045 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
2046 else if(argc != 1)
2047 die("usage: dwm [-v]\n");
2048 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2049 fputs("warning: no locale support\n", stderr);
2050 if(!(dpy = XOpenDisplay(NULL)))
2051 die("dwm: cannot open display\n");
2052 checkotherwm();
2053 setup();
2054 scan();
2055 run();
2056 cleanup();
2057 XCloseDisplay(dpy);
2058 return 0;
2059}