1d78655437841831e0bf34c96fb5a8e3efe9bc79
[dwm.git] / dwm.c
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) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
46 #define INTERSECT(x,y,w,h,m) (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
47 * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
48 #define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
49 #define LENGTH(X) (sizeof X / sizeof X[0])
50 #define MAX(A, B) ((A) > (B) ? (A) : (B))
51 #define MIN(A, B) ((A) < (B) ? (A) : (B))
52 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53 #define WIDTH(X) ((X)->w + 2 * (X)->bw)
54 #define HEIGHT(X) ((X)->h + 2 * (X)->bw)
55 #define TAGMASK ((1 << LENGTH(tags)) - 1)
56 #define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetWMState,
62 NetWMFullscreen, NetActiveWindow, NetWMWindowType,
63 NetWMWindowTypeDialog, NetLast }; /* EWMH atoms */
64 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
65 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
66 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
67
68 typedef union {
69 int i;
70 unsigned int ui;
71 float f;
72 const void *v;
73 } Arg;
74
75 typedef struct {
76 unsigned int click;
77 unsigned int mask;
78 unsigned int button;
79 void (*func)(const Arg *arg);
80 const Arg arg;
81 } Button;
82
83 typedef struct Monitor Monitor;
84 typedef struct Client Client;
85 struct Client {
86 char name[256];
87 float mina, maxa;
88 int x, y, w, h;
89 int oldx, oldy, oldw, oldh;
90 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
91 int bw, oldbw;
92 unsigned int tags;
93 Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
94 Client *next;
95 Client *snext;
96 Monitor *mon;
97 Window win;
98 };
99
100 typedef struct {
101 int x, y, w, h;
102 unsigned long norm[ColLast];
103 unsigned long sel[ColLast];
104 Drawable drawable;
105 GC gc;
106 struct {
107 int ascent;
108 int descent;
109 int height;
110 XFontSet set;
111 XFontStruct *xfont;
112 } font;
113 } DC; /* draw context */
114
115 typedef struct {
116 unsigned int mod;
117 KeySym keysym;
118 void (*func)(const Arg *);
119 const Arg arg;
120 } Key;
121
122 typedef struct {
123 const char *symbol;
124 void (*arrange)(Monitor *);
125 } Layout;
126
127 struct Monitor {
128 char ltsymbol[16];
129 float mfact;
130 int nmaster;
131 int num;
132 int by; /* bar geometry */
133 int mx, my, mw, mh; /* screen size */
134 int wx, wy, ww, wh; /* window area */
135 unsigned int seltags;
136 unsigned int sellt;
137 unsigned int tagset[2];
138 Bool showbar;
139 Bool topbar;
140 Client *clients;
141 Client *sel;
142 Client *stack;
143 Monitor *next;
144 Window barwin;
145 const Layout *lt[2];
146 };
147
148 typedef struct {
149 const char *class;
150 const char *instance;
151 const char *title;
152 unsigned int tags;
153 Bool isfloating;
154 int monitor;
155 } Rule;
156
157 /* function declarations */
158 static void applyrules(Client *c);
159 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
160 static void arrange(Monitor *m);
161 static void arrangemon(Monitor *m);
162 static void attach(Client *c);
163 static void attachstack(Client *c);
164 static void buttonpress(XEvent *e);
165 static void checkotherwm(void);
166 static void cleanup(void);
167 static void cleanupmon(Monitor *mon);
168 static void clearurgent(Client *c);
169 static void clientmessage(XEvent *e);
170 static void configure(Client *c);
171 static void configurenotify(XEvent *e);
172 static void configurerequest(XEvent *e);
173 static Monitor *createmon(void);
174 static void destroynotify(XEvent *e);
175 static void detach(Client *c);
176 static void detachstack(Client *c);
177 static void die(const char *errstr, ...);
178 static Monitor *dirtomon(int dir);
179 static void drawbar(Monitor *m);
180 static void drawbars(void);
181 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
182 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
183 static void enternotify(XEvent *e);
184 static void expose(XEvent *e);
185 static void focus(Client *c);
186 static void focusin(XEvent *e);
187 static void focusmon(const Arg *arg);
188 static void focusstack(const Arg *arg);
189 static unsigned long getcolor(const char *colstr);
190 static Bool getrootptr(int *x, int *y);
191 static long getstate(Window w);
192 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
193 static void grabbuttons(Client *c, Bool focused);
194 static void grabkeys(void);
195 static void incnmaster(const Arg *arg);
196 static void initfont(const char *fontstr);
197 static void keypress(XEvent *e);
198 static void killclient(const Arg *arg);
199 static void manage(Window w, XWindowAttributes *wa);
200 static void mappingnotify(XEvent *e);
201 static void maprequest(XEvent *e);
202 static void monocle(Monitor *m);
203 static void motionnotify(XEvent *e);
204 static void movemouse(const Arg *arg);
205 static Client *nexttiled(Client *c);
206 static void pop(Client *);
207 static void propertynotify(XEvent *e);
208 static void quit(const Arg *arg);
209 static Monitor *recttomon(int x, int y, int w, int h);
210 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
211 static void resizeclient(Client *c, int x, int y, int w, int h);
212 static void resizemouse(const Arg *arg);
213 static void restack(Monitor *m);
214 static void run(void);
215 static void scan(void);
216 static Bool sendevent(Client *c, Atom proto);
217 static void sendmon(Client *c, Monitor *m);
218 static void setclientstate(Client *c, long state);
219 static void setfocus(Client *c);
220 static void setfullscreen(Client *c, Bool fullscreen);
221 static void setlayout(const Arg *arg);
222 static void setmfact(const Arg *arg);
223 static void setup(void);
224 static void showhide(Client *c);
225 static void sigchld(int unused);
226 static void spawn(const Arg *arg);
227 static void tag(const Arg *arg);
228 static void tagmon(const Arg *arg);
229 static int textnw(const char *text, unsigned int len);
230 static void tile(Monitor *);
231 static void togglebar(const Arg *arg);
232 static void togglefloating(const Arg *arg);
233 static void toggletag(const Arg *arg);
234 static void toggleview(const Arg *arg);
235 static void unfocus(Client *c, Bool setfocus);
236 static void unmanage(Client *c, Bool destroyed);
237 static void unmapnotify(XEvent *e);
238 static Bool updategeom(void);
239 static void updatebarpos(Monitor *m);
240 static void updatebars(void);
241 static void updatenumlockmask(void);
242 static void updatesizehints(Client *c);
243 static void updatestatus(void);
244 static void updatewindowtype(Client *c);
245 static void updatetitle(Client *c);
246 static void updatewmhints(Client *c);
247 static void view(const Arg *arg);
248 static Client *wintoclient(Window w);
249 static Monitor *wintomon(Window w);
250 static int xerror(Display *dpy, XErrorEvent *ee);
251 static int xerrordummy(Display *dpy, XErrorEvent *ee);
252 static int xerrorstart(Display *dpy, XErrorEvent *ee);
253 static void zoom(const Arg *arg);
254
255 /* variables */
256 static const char broken[] = "broken";
257 static char stext[256];
258 static int screen;
259 static int sw, sh; /* X display screen geometry width, height */
260 static int bh, blw = 0; /* bar geometry */
261 static int (*xerrorxlib)(Display *, XErrorEvent *);
262 static unsigned int numlockmask = 0;
263 static void (*handler[LASTEvent]) (XEvent *) = {
264 [ButtonPress] = buttonpress,
265 [ClientMessage] = clientmessage,
266 [ConfigureRequest] = configurerequest,
267 [ConfigureNotify] = configurenotify,
268 [DestroyNotify] = destroynotify,
269 [EnterNotify] = enternotify,
270 [Expose] = expose,
271 [FocusIn] = focusin,
272 [KeyPress] = keypress,
273 [MappingNotify] = mappingnotify,
274 [MapRequest] = maprequest,
275 [MotionNotify] = motionnotify,
276 [PropertyNotify] = propertynotify,
277 [UnmapNotify] = unmapnotify
278 };
279 static Atom wmatom[WMLast], netatom[NetLast];
280 static Bool running = True;
281 static Cursor cursor[CurLast];
282 static Display *dpy;
283 static DC dc;
284 static Monitor *mons = NULL, *selmon = NULL;
285 static Window root;
286
287 /* configuration, allows nested code to access above variables */
288 #include "config.h"
289
290 /* compile-time check if all tags fit into an unsigned int bit array. */
291 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
292
293 /* function implementations */
294 void
295 applyrules(Client *c) {
296 const char *class, *instance;
297 unsigned int i;
298 const Rule *r;
299 Monitor *m;
300 XClassHint ch = { NULL, NULL };
301
302 /* rule matching */
303 c->isfloating = c->tags = 0;
304 XGetClassHint(dpy, c->win, &ch);
305 class = ch.res_class ? ch.res_class : broken;
306 instance = ch.res_name ? ch.res_name : broken;
307
308 for(i = 0; i < LENGTH(rules); i++) {
309 r = &rules[i];
310 if((!r->title || strstr(c->name, r->title))
311 && (!r->class || strstr(class, r->class))
312 && (!r->instance || strstr(instance, r->instance)))
313 {
314 c->isfloating = r->isfloating;
315 c->tags |= r->tags;
316 for(m = mons; m && m->num != r->monitor; m = m->next);
317 if(m)
318 c->mon = m;
319 }
320 }
321 if(ch.res_class)
322 XFree(ch.res_class);
323 if(ch.res_name)
324 XFree(ch.res_name);
325 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
326 }
327
328 Bool
329 applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
330 Bool baseismin;
331 Monitor *m = c->mon;
332
333 /* set minimum possible */
334 *w = MAX(1, *w);
335 *h = MAX(1, *h);
336 if(interact) {
337 if(*x > sw)
338 *x = sw - WIDTH(c);
339 if(*y > sh)
340 *y = sh - HEIGHT(c);
341 if(*x + *w + 2 * c->bw < 0)
342 *x = 0;
343 if(*y + *h + 2 * c->bw < 0)
344 *y = 0;
345 }
346 else {
347 if(*x >= m->wx + m->ww)
348 *x = m->wx + m->ww - WIDTH(c);
349 if(*y >= m->wy + m->wh)
350 *y = m->wy + m->wh - HEIGHT(c);
351 if(*x + *w + 2 * c->bw <= m->wx)
352 *x = m->wx;
353 if(*y + *h + 2 * c->bw <= m->wy)
354 *y = m->wy;
355 }
356 if(*h < bh)
357 *h = bh;
358 if(*w < bh)
359 *w = bh;
360 if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
361 /* see last two sentences in ICCCM 4.1.2.3 */
362 baseismin = c->basew == c->minw && c->baseh == c->minh;
363 if(!baseismin) { /* temporarily remove base dimensions */
364 *w -= c->basew;
365 *h -= c->baseh;
366 }
367 /* adjust for aspect limits */
368 if(c->mina > 0 && c->maxa > 0) {
369 if(c->maxa < (float)*w / *h)
370 *w = *h * c->maxa + 0.5;
371 else if(c->mina < (float)*h / *w)
372 *h = *w * c->mina + 0.5;
373 }
374 if(baseismin) { /* increment calculation requires this */
375 *w -= c->basew;
376 *h -= c->baseh;
377 }
378 /* adjust for increment value */
379 if(c->incw)
380 *w -= *w % c->incw;
381 if(c->inch)
382 *h -= *h % c->inch;
383 /* restore base dimensions */
384 *w = MAX(*w + c->basew, c->minw);
385 *h = MAX(*h + c->baseh, c->minh);
386 if(c->maxw)
387 *w = MIN(*w, c->maxw);
388 if(c->maxh)
389 *h = MIN(*h, c->maxh);
390 }
391 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
392 }
393
394 void
395 arrange(Monitor *m) {
396 if(m)
397 showhide(m->stack);
398 else for(m = mons; m; m = m->next)
399 showhide(m->stack);
400 if(m)
401 arrangemon(m);
402 else for(m = mons; m; m = m->next)
403 arrangemon(m);
404 }
405
406 void
407 arrangemon(Monitor *m) {
408 strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
409 if(m->lt[m->sellt]->arrange)
410 m->lt[m->sellt]->arrange(m);
411 restack(m);
412 }
413
414 void
415 attach(Client *c) {
416 c->next = c->mon->clients;
417 c->mon->clients = c;
418 }
419
420 void
421 attachstack(Client *c) {
422 c->snext = c->mon->stack;
423 c->mon->stack = c;
424 }
425
426 void
427 buttonpress(XEvent *e) {
428 unsigned int i, x, click;
429 Arg arg = {0};
430 Client *c;
431 Monitor *m;
432 XButtonPressedEvent *ev = &e->xbutton;
433
434 click = ClkRootWin;
435 /* focus monitor if necessary */
436 if((m = wintomon(ev->window)) && m != selmon) {
437 unfocus(selmon->sel, True);
438 selmon = m;
439 focus(NULL);
440 }
441 if(ev->window == selmon->barwin) {
442 i = x = 0;
443 do
444 x += TEXTW(tags[i]);
445 while(ev->x >= x && ++i < LENGTH(tags));
446 if(i < LENGTH(tags)) {
447 click = ClkTagBar;
448 arg.ui = 1 << i;
449 }
450 else if(ev->x < x + blw)
451 click = ClkLtSymbol;
452 else if(ev->x > selmon->ww - TEXTW(stext))
453 click = ClkStatusText;
454 else
455 click = ClkWinTitle;
456 }
457 else if((c = wintoclient(ev->window))) {
458 focus(c);
459 click = ClkClientWin;
460 }
461 for(i = 0; i < LENGTH(buttons); i++)
462 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
463 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
464 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
465 }
466
467 void
468 checkotherwm(void) {
469 xerrorxlib = XSetErrorHandler(xerrorstart);
470 /* this causes an error if some other window manager is running */
471 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
472 XSync(dpy, False);
473 XSetErrorHandler(xerror);
474 XSync(dpy, False);
475 }
476
477 void
478 cleanup(void) {
479 Arg a = {.ui = ~0};
480 Layout foo = { "", NULL };
481 Monitor *m;
482
483 view(&a);
484 selmon->lt[selmon->sellt] = &foo;
485 for(m = mons; m; m = m->next)
486 while(m->stack)
487 unmanage(m->stack, False);
488 if(dc.font.set)
489 XFreeFontSet(dpy, dc.font.set);
490 else
491 XFreeFont(dpy, dc.font.xfont);
492 XUngrabKey(dpy, AnyKey, AnyModifier, root);
493 XFreePixmap(dpy, dc.drawable);
494 XFreeGC(dpy, dc.gc);
495 XFreeCursor(dpy, cursor[CurNormal]);
496 XFreeCursor(dpy, cursor[CurResize]);
497 XFreeCursor(dpy, cursor[CurMove]);
498 while(mons)
499 cleanupmon(mons);
500 XSync(dpy, False);
501 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
502 }
503
504 void
505 cleanupmon(Monitor *mon) {
506 Monitor *m;
507
508 if(mon == mons)
509 mons = mons->next;
510 else {
511 for(m = mons; m && m->next != mon; m = m->next);
512 m->next = mon->next;
513 }
514 XUnmapWindow(dpy, mon->barwin);
515 XDestroyWindow(dpy, mon->barwin);
516 free(mon);
517 }
518
519 void
520 clearurgent(Client *c) {
521 XWMHints *wmh;
522
523 c->isurgent = False;
524 if(!(wmh = XGetWMHints(dpy, c->win)))
525 return;
526 wmh->flags &= ~XUrgencyHint;
527 XSetWMHints(dpy, c->win, wmh);
528 XFree(wmh);
529 }
530
531 void
532 clientmessage(XEvent *e) {
533 XClientMessageEvent *cme = &e->xclient;
534 Client *c = wintoclient(cme->window);
535
536 if(!c)
537 return;
538 if(cme->message_type == netatom[NetWMState]) {
539 if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
540 setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD */
541 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
542 }
543 else if(cme->message_type == netatom[NetActiveWindow]) {
544 if(!ISVISIBLE(c)) {
545 c->mon->seltags ^= 1;
546 c->mon->tagset[c->mon->seltags] = c->tags;
547 }
548 pop(c);
549 }
550 }
551
552 void
553 configure(Client *c) {
554 XConfigureEvent ce;
555
556 ce.type = ConfigureNotify;
557 ce.display = dpy;
558 ce.event = c->win;
559 ce.window = c->win;
560 ce.x = c->x;
561 ce.y = c->y;
562 ce.width = c->w;
563 ce.height = c->h;
564 ce.border_width = c->bw;
565 ce.above = None;
566 ce.override_redirect = False;
567 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
568 }
569
570 void
571 configurenotify(XEvent *e) {
572 Monitor *m;
573 XConfigureEvent *ev = &e->xconfigure;
574 Bool dirty;
575
576 if(ev->window == root) {
577 dirty = (sw != ev->width);
578 sw = ev->width;
579 sh = ev->height;
580 if(updategeom() || dirty) {
581 if(dc.drawable != 0)
582 XFreePixmap(dpy, dc.drawable);
583 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
584 updatebars();
585 for(m = mons; m; m = m->next)
586 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
587 focus(NULL);
588 arrange(NULL);
589 }
590 }
591 }
592
593 void
594 configurerequest(XEvent *e) {
595 Client *c;
596 Monitor *m;
597 XConfigureRequestEvent *ev = &e->xconfigurerequest;
598 XWindowChanges wc;
599
600 if((c = wintoclient(ev->window))) {
601 if(ev->value_mask & CWBorderWidth)
602 c->bw = ev->border_width;
603 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
604 m = c->mon;
605 if(ev->value_mask & CWX) {
606 c->oldx = c->x;
607 c->x = m->mx + ev->x;
608 }
609 if(ev->value_mask & CWY) {
610 c->oldy = c->y;
611 c->y = m->my + ev->y;
612 }
613 if(ev->value_mask & CWWidth) {
614 c->oldw = c->w;
615 c->w = ev->width;
616 }
617 if(ev->value_mask & CWHeight) {
618 c->oldh = c->h;
619 c->h = ev->height;
620 }
621 if((c->x + c->w) > m->mx + m->mw && c->isfloating)
622 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
623 if((c->y + c->h) > m->my + m->mh && c->isfloating)
624 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
625 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
626 configure(c);
627 if(ISVISIBLE(c))
628 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
629 }
630 else
631 configure(c);
632 }
633 else {
634 wc.x = ev->x;
635 wc.y = ev->y;
636 wc.width = ev->width;
637 wc.height = ev->height;
638 wc.border_width = ev->border_width;
639 wc.sibling = ev->above;
640 wc.stack_mode = ev->detail;
641 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
642 }
643 XSync(dpy, False);
644 }
645
646 Monitor *
647 createmon(void) {
648 Monitor *m;
649
650 if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
651 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
652 m->tagset[0] = m->tagset[1] = 1;
653 m->mfact = mfact;
654 m->nmaster = nmaster;
655 m->showbar = showbar;
656 m->topbar = topbar;
657 m->lt[0] = &layouts[0];
658 m->lt[1] = &layouts[1 % LENGTH(layouts)];
659 strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
660 return m;
661 }
662
663 void
664 destroynotify(XEvent *e) {
665 Client *c;
666 XDestroyWindowEvent *ev = &e->xdestroywindow;
667
668 if((c = wintoclient(ev->window)))
669 unmanage(c, True);
670 }
671
672 void
673 detach(Client *c) {
674 Client **tc;
675
676 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
677 *tc = c->next;
678 }
679
680 void
681 detachstack(Client *c) {
682 Client **tc, *t;
683
684 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
685 *tc = c->snext;
686
687 if(c == c->mon->sel) {
688 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
689 c->mon->sel = t;
690 }
691 }
692
693 void
694 die(const char *errstr, ...) {
695 va_list ap;
696
697 va_start(ap, errstr);
698 vfprintf(stderr, errstr, ap);
699 va_end(ap);
700 exit(EXIT_FAILURE);
701 }
702
703 Monitor *
704 dirtomon(int dir) {
705 Monitor *m = NULL;
706
707 if(dir > 0) {
708 if(!(m = selmon->next))
709 m = mons;
710 }
711 else if(selmon == mons)
712 for(m = mons; m->next; m = m->next);
713 else
714 for(m = mons; m->next != selmon; m = m->next);
715 return m;
716 }
717
718 void
719 drawbar(Monitor *m) {
720 int x;
721 unsigned int i, occ = 0, urg = 0;
722 unsigned long *col;
723 Client *c;
724
725 for(c = m->clients; c; c = c->next) {
726 occ |= c->tags;
727 if(c->isurgent)
728 urg |= c->tags;
729 }
730 dc.x = 0;
731 for(i = 0; i < LENGTH(tags); i++) {
732 dc.w = TEXTW(tags[i]);
733 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
734 drawtext(tags[i], col, urg & 1 << i);
735 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
736 occ & 1 << i, urg & 1 << i, col);
737 dc.x += dc.w;
738 }
739 dc.w = blw = TEXTW(m->ltsymbol);
740 drawtext(m->ltsymbol, dc.norm, False);
741 dc.x += dc.w;
742 x = dc.x;
743 if(m == selmon) { /* status is only drawn on selected monitor */
744 dc.w = TEXTW(stext);
745 dc.x = m->ww - dc.w;
746 if(dc.x < x) {
747 dc.x = x;
748 dc.w = m->ww - x;
749 }
750 drawtext(stext, dc.norm, False);
751 }
752 else
753 dc.x = m->ww;
754 if((dc.w = dc.x - x) > bh) {
755 dc.x = x;
756 if(m->sel) {
757 col = m == selmon ? dc.sel : dc.norm;
758 drawtext(m->sel->name, col, False);
759 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
760 }
761 else
762 drawtext(NULL, dc.norm, False);
763 }
764 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
765 XSync(dpy, False);
766 }
767
768 void
769 drawbars(void) {
770 Monitor *m;
771
772 for(m = mons; m; m = m->next)
773 drawbar(m);
774 }
775
776 void
777 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
778 int x;
779
780 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
781 x = (dc.font.ascent + dc.font.descent + 2) / 4;
782 if(filled)
783 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
784 else if(empty)
785 XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
786 }
787
788 void
789 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
790 char buf[256];
791 int i, x, y, h, len, olen;
792
793 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
794 XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
795 if(!text)
796 return;
797 olen = strlen(text);
798 h = dc.font.ascent + dc.font.descent;
799 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
800 x = dc.x + (h / 2);
801 /* shorten text if necessary */
802 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
803 if(!len)
804 return;
805 memcpy(buf, text, len);
806 if(len < olen)
807 for(i = len; i && i > len - 3; buf[--i] = '.');
808 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
809 if(dc.font.set)
810 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
811 else
812 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
813 }
814
815 void
816 enternotify(XEvent *e) {
817 Client *c;
818 Monitor *m;
819 XCrossingEvent *ev = &e->xcrossing;
820
821 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
822 return;
823 c = wintoclient(ev->window);
824 m = c ? c->mon : wintomon(ev->window);
825 if(m != selmon) {
826 unfocus(selmon->sel, True);
827 selmon = m;
828 }
829 else if(!c || c == selmon->sel)
830 return;
831 focus(c);
832 }
833
834 void
835 expose(XEvent *e) {
836 Monitor *m;
837 XExposeEvent *ev = &e->xexpose;
838
839 if(ev->count == 0 && (m = wintomon(ev->window)))
840 drawbar(m);
841 }
842
843 void
844 focus(Client *c) {
845 if(!c || !ISVISIBLE(c))
846 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
847 /* was if(selmon->sel) */
848 if(selmon->sel && selmon->sel != c)
849 unfocus(selmon->sel, False);
850 if(c) {
851 if(c->mon != selmon)
852 selmon = c->mon;
853 if(c->isurgent)
854 clearurgent(c);
855 detachstack(c);
856 attachstack(c);
857 grabbuttons(c, True);
858 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
859 setfocus(c);
860 }
861 else
862 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
863 selmon->sel = c;
864 drawbars();
865 }
866
867 void
868 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
869 XFocusChangeEvent *ev = &e->xfocus;
870
871 if(selmon->sel && ev->window != selmon->sel->win)
872 setfocus(selmon->sel);
873 }
874
875 void
876 focusmon(const Arg *arg) {
877 Monitor *m;
878
879 if(!mons->next)
880 return;
881 if((m = dirtomon(arg->i)) == selmon)
882 return;
883 unfocus(selmon->sel, True);
884 selmon = m;
885 focus(NULL);
886 }
887
888 void
889 focusstack(const Arg *arg) {
890 Client *c = NULL, *i;
891
892 if(!selmon->sel)
893 return;
894 if(arg->i > 0) {
895 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
896 if(!c)
897 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
898 }
899 else {
900 for(i = selmon->clients; i != selmon->sel; i = i->next)
901 if(ISVISIBLE(i))
902 c = i;
903 if(!c)
904 for(; i; i = i->next)
905 if(ISVISIBLE(i))
906 c = i;
907 }
908 if(c) {
909 focus(c);
910 restack(selmon);
911 }
912 }
913
914 Atom
915 getatomprop(Client *c, Atom prop) {
916 int di;
917 unsigned long dl;
918 unsigned char *p = NULL;
919 Atom da, atom = None;
920
921 if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
922 &da, &di, &dl, &dl, &p) == Success && p) {
923 atom = *(Atom *)p;
924 XFree(p);
925 }
926 return atom;
927 }
928
929 unsigned long
930 getcolor(const char *colstr) {
931 Colormap cmap = DefaultColormap(dpy, screen);
932 XColor color;
933
934 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
935 die("error, cannot allocate color '%s'\n", colstr);
936 return color.pixel;
937 }
938
939 Bool
940 getrootptr(int *x, int *y) {
941 int di;
942 unsigned int dui;
943 Window dummy;
944
945 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
946 }
947
948 long
949 getstate(Window w) {
950 int format;
951 long result = -1;
952 unsigned char *p = NULL;
953 unsigned long n, extra;
954 Atom real;
955
956 if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
957 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
958 return -1;
959 if(n != 0)
960 result = *p;
961 XFree(p);
962 return result;
963 }
964
965 Bool
966 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
967 char **list = NULL;
968 int n;
969 XTextProperty name;
970
971 if(!text || size == 0)
972 return False;
973 text[0] = '\0';
974 XGetTextProperty(dpy, w, &name, atom);
975 if(!name.nitems)
976 return False;
977 if(name.encoding == XA_STRING)
978 strncpy(text, (char *)name.value, size - 1);
979 else {
980 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
981 strncpy(text, *list, size - 1);
982 XFreeStringList(list);
983 }
984 }
985 text[size - 1] = '\0';
986 XFree(name.value);
987 return True;
988 }
989
990 void
991 grabbuttons(Client *c, Bool focused) {
992 updatenumlockmask();
993 {
994 unsigned int i, j;
995 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
996 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
997 if(focused) {
998 for(i = 0; i < LENGTH(buttons); i++)
999 if(buttons[i].click == ClkClientWin)
1000 for(j = 0; j < LENGTH(modifiers); j++)
1001 XGrabButton(dpy, buttons[i].button,
1002 buttons[i].mask | modifiers[j],
1003 c->win, False, BUTTONMASK,
1004 GrabModeAsync, GrabModeSync, None, None);
1005 }
1006 else
1007 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1008 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1009 }
1010 }
1011
1012 void
1013 grabkeys(void) {
1014 updatenumlockmask();
1015 {
1016 unsigned int i, j;
1017 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1018 KeyCode code;
1019
1020 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1021 for(i = 0; i < LENGTH(keys); i++)
1022 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1023 for(j = 0; j < LENGTH(modifiers); j++)
1024 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1025 True, GrabModeAsync, GrabModeAsync);
1026 }
1027 }
1028
1029 void
1030 incnmaster(const Arg *arg) {
1031 selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1032 arrange(selmon);
1033 }
1034
1035 void
1036 initfont(const char *fontstr) {
1037 char *def, **missing;
1038 int n;
1039
1040 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
1041 if(missing) {
1042 while(n--)
1043 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
1044 XFreeStringList(missing);
1045 }
1046 if(dc.font.set) {
1047 XFontStruct **xfonts;
1048 char **font_names;
1049
1050 dc.font.ascent = dc.font.descent = 0;
1051 XExtentsOfFontSet(dc.font.set);
1052 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
1053 while(n--) {
1054 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
1055 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
1056 xfonts++;
1057 }
1058 }
1059 else {
1060 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
1061 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
1062 die("error, cannot load font: '%s'\n", fontstr);
1063 dc.font.ascent = dc.font.xfont->ascent;
1064 dc.font.descent = dc.font.xfont->descent;
1065 }
1066 dc.font.height = dc.font.ascent + dc.font.descent;
1067 }
1068
1069 #ifdef XINERAMA
1070 static Bool
1071 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1072 while(n--)
1073 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1074 && unique[n].width == info->width && unique[n].height == info->height)
1075 return False;
1076 return True;
1077 }
1078 #endif /* XINERAMA */
1079
1080 void
1081 keypress(XEvent *e) {
1082 unsigned int i;
1083 KeySym keysym;
1084 XKeyEvent *ev;
1085
1086 ev = &e->xkey;
1087 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1088 for(i = 0; i < LENGTH(keys); i++)
1089 if(keysym == keys[i].keysym
1090 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1091 && keys[i].func)
1092 keys[i].func(&(keys[i].arg));
1093 }
1094
1095 void
1096 killclient(const Arg *arg) {
1097 if(!selmon->sel)
1098 return;
1099 if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1100 XGrabServer(dpy);
1101 XSetErrorHandler(xerrordummy);
1102 XSetCloseDownMode(dpy, DestroyAll);
1103 XKillClient(dpy, selmon->sel->win);
1104 XSync(dpy, False);
1105 XSetErrorHandler(xerror);
1106 XUngrabServer(dpy);
1107 }
1108 }
1109
1110 void
1111 manage(Window w, XWindowAttributes *wa) {
1112 Client *c, *t = NULL;
1113 Window trans = None;
1114 XWindowChanges wc;
1115
1116 if(!(c = calloc(1, sizeof(Client))))
1117 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1118 c->win = w;
1119 updatetitle(c);
1120 if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1121 c->mon = t->mon;
1122 c->tags = t->tags;
1123 }
1124 else {
1125 c->mon = selmon;
1126 applyrules(c);
1127 }
1128 /* geometry */
1129 c->x = c->oldx = wa->x;
1130 c->y = c->oldy = wa->y;
1131 c->w = c->oldw = wa->width;
1132 c->h = c->oldh = wa->height;
1133 c->oldbw = wa->border_width;
1134
1135 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1136 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1137 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1138 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1139 c->x = MAX(c->x, c->mon->mx);
1140 /* only fix client y-offset, if the client center might cover the bar */
1141 c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1142 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1143 c->bw = borderpx;
1144
1145 wc.border_width = c->bw;
1146 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1147 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1148 configure(c); /* propagates border_width, if size doesn't change */
1149 updatewindowtype(c);
1150 updatesizehints(c);
1151 updatewmhints(c);
1152 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1153 grabbuttons(c, False);
1154 if(!c->isfloating)
1155 c->isfloating = c->oldstate = trans != None || c->isfixed;
1156 if(c->isfloating)
1157 XRaiseWindow(dpy, c->win);
1158 attach(c);
1159 attachstack(c);
1160 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1161 setclientstate(c, NormalState);
1162 if (c->mon == selmon)
1163 unfocus(selmon->sel, False);
1164 c->mon->sel = c;
1165 arrange(c->mon);
1166 XMapWindow(dpy, c->win);
1167 focus(NULL);
1168 }
1169
1170 void
1171 mappingnotify(XEvent *e) {
1172 XMappingEvent *ev = &e->xmapping;
1173
1174 XRefreshKeyboardMapping(ev);
1175 if(ev->request == MappingKeyboard)
1176 grabkeys();
1177 }
1178
1179 void
1180 maprequest(XEvent *e) {
1181 static XWindowAttributes wa;
1182 XMapRequestEvent *ev = &e->xmaprequest;
1183
1184 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1185 return;
1186 if(wa.override_redirect)
1187 return;
1188 if(!wintoclient(ev->window))
1189 manage(ev->window, &wa);
1190 }
1191
1192 void
1193 monocle(Monitor *m) {
1194 unsigned int n = 0;
1195 Client *c;
1196
1197 for(c = m->clients; c; c = c->next)
1198 if(ISVISIBLE(c))
1199 n++;
1200 if(n > 0) /* override layout symbol */
1201 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1202 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1203 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1204 }
1205
1206 void
1207 motionnotify(XEvent *e) {
1208 static Monitor *mon = NULL;
1209 Monitor *m;
1210 XMotionEvent *ev = &e->xmotion;
1211
1212 if(ev->window != root)
1213 return;
1214 if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1215 selmon = m;
1216 focus(NULL);
1217 }
1218 mon = m;
1219 }
1220
1221 void
1222 movemouse(const Arg *arg) {
1223 int x, y, ocx, ocy, nx, ny;
1224 Client *c;
1225 Monitor *m;
1226 XEvent ev;
1227
1228 if(!(c = selmon->sel))
1229 return;
1230 restack(selmon);
1231 ocx = c->x;
1232 ocy = c->y;
1233 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1234 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1235 return;
1236 if(!getrootptr(&x, &y))
1237 return;
1238 do {
1239 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1240 switch(ev.type) {
1241 case ConfigureRequest:
1242 case Expose:
1243 case MapRequest:
1244 handler[ev.type](&ev);
1245 break;
1246 case MotionNotify:
1247 nx = ocx + (ev.xmotion.x - x);
1248 ny = ocy + (ev.xmotion.y - y);
1249 if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1250 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1251 if(abs(selmon->wx - nx) < snap)
1252 nx = selmon->wx;
1253 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1254 nx = selmon->wx + selmon->ww - WIDTH(c);
1255 if(abs(selmon->wy - ny) < snap)
1256 ny = selmon->wy;
1257 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1258 ny = selmon->wy + selmon->wh - HEIGHT(c);
1259 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1260 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1261 togglefloating(NULL);
1262 }
1263 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1264 resize(c, nx, ny, c->w, c->h, True);
1265 break;
1266 }
1267 } while(ev.type != ButtonRelease);
1268 XUngrabPointer(dpy, CurrentTime);
1269 if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1270 sendmon(c, m);
1271 selmon = m;
1272 focus(NULL);
1273 }
1274 }
1275
1276 Client *
1277 nexttiled(Client *c) {
1278 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1279 return c;
1280 }
1281
1282 void
1283 pop(Client *c) {
1284 detach(c);
1285 attach(c);
1286 focus(c);
1287 arrange(c->mon);
1288 }
1289
1290 void
1291 propertynotify(XEvent *e) {
1292 Client *c;
1293 Window trans;
1294 XPropertyEvent *ev = &e->xproperty;
1295
1296 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1297 updatestatus();
1298 else if(ev->state == PropertyDelete)
1299 return; /* ignore */
1300 else if((c = wintoclient(ev->window))) {
1301 switch(ev->atom) {
1302 default: break;
1303 case XA_WM_TRANSIENT_FOR:
1304 if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1305 (c->isfloating = (wintoclient(trans)) != NULL))
1306 arrange(c->mon);
1307 break;
1308 case XA_WM_NORMAL_HINTS:
1309 updatesizehints(c);
1310 break;
1311 case XA_WM_HINTS:
1312 updatewmhints(c);
1313 drawbars();
1314 break;
1315 }
1316 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1317 updatetitle(c);
1318 if(c == c->mon->sel)
1319 drawbar(c->mon);
1320 }
1321 if(ev->atom == netatom[NetWMWindowType])
1322 updatewindowtype(c);
1323 }
1324 }
1325
1326 void
1327 quit(const Arg *arg) {
1328 running = False;
1329 }
1330
1331 Monitor *
1332 recttomon(int x, int y, int w, int h) {
1333 Monitor *m, *r = selmon;
1334 int a, area = 0;
1335
1336 for(m = mons; m; m = m->next)
1337 if((a = INTERSECT(x, y, w, h, m)) > area) {
1338 area = a;
1339 r = m;
1340 }
1341 return r;
1342 }
1343
1344 void
1345 resize(Client *c, int x, int y, int w, int h, Bool interact) {
1346 if(applysizehints(c, &x, &y, &w, &h, interact))
1347 resizeclient(c, x, y, w, h);
1348 }
1349
1350 void
1351 resizeclient(Client *c, int x, int y, int w, int h) {
1352 XWindowChanges wc;
1353
1354 c->oldx = c->x; c->x = wc.x = x;
1355 c->oldy = c->y; c->y = wc.y = y;
1356 c->oldw = c->w; c->w = wc.width = w;
1357 c->oldh = c->h; c->h = wc.height = h;
1358 wc.border_width = c->bw;
1359 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1360 configure(c);
1361 XSync(dpy, False);
1362 }
1363
1364 void
1365 resizemouse(const Arg *arg) {
1366 int ocx, ocy;
1367 int nw, nh;
1368 Client *c;
1369 Monitor *m;
1370 XEvent ev;
1371
1372 if(!(c = selmon->sel))
1373 return;
1374 restack(selmon);
1375 ocx = c->x;
1376 ocy = c->y;
1377 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1378 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1379 return;
1380 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1381 do {
1382 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1383 switch(ev.type) {
1384 case ConfigureRequest:
1385 case Expose:
1386 case MapRequest:
1387 handler[ev.type](&ev);
1388 break;
1389 case MotionNotify:
1390 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1391 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1392 if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1393 && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1394 {
1395 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1396 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1397 togglefloating(NULL);
1398 }
1399 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1400 resize(c, c->x, c->y, nw, nh, True);
1401 break;
1402 }
1403 } while(ev.type != ButtonRelease);
1404 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1405 XUngrabPointer(dpy, CurrentTime);
1406 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1407 if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1408 sendmon(c, m);
1409 selmon = m;
1410 focus(NULL);
1411 }
1412 }
1413
1414 void
1415 restack(Monitor *m) {
1416 Client *c;
1417 XEvent ev;
1418 XWindowChanges wc;
1419
1420 drawbar(m);
1421 if(!m->sel)
1422 return;
1423 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1424 XRaiseWindow(dpy, m->sel->win);
1425 if(m->lt[m->sellt]->arrange) {
1426 wc.stack_mode = Below;
1427 wc.sibling = m->barwin;
1428 for(c = m->stack; c; c = c->snext)
1429 if(!c->isfloating && ISVISIBLE(c)) {
1430 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1431 wc.sibling = c->win;
1432 }
1433 }
1434 XSync(dpy, False);
1435 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1436 }
1437
1438 void
1439 run(void) {
1440 XEvent ev;
1441 /* main event loop */
1442 XSync(dpy, False);
1443 while(running && !XNextEvent(dpy, &ev))
1444 if(handler[ev.type])
1445 handler[ev.type](&ev); /* call handler */
1446 }
1447
1448 void
1449 scan(void) {
1450 unsigned int i, num;
1451 Window d1, d2, *wins = NULL;
1452 XWindowAttributes wa;
1453
1454 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1455 for(i = 0; i < num; i++) {
1456 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1457 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1458 continue;
1459 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1460 manage(wins[i], &wa);
1461 }
1462 for(i = 0; i < num; i++) { /* now the transients */
1463 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1464 continue;
1465 if(XGetTransientForHint(dpy, wins[i], &d1)
1466 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1467 manage(wins[i], &wa);
1468 }
1469 if(wins)
1470 XFree(wins);
1471 }
1472 }
1473
1474 void
1475 sendmon(Client *c, Monitor *m) {
1476 if(c->mon == m)
1477 return;
1478 unfocus(c, True);
1479 detach(c);
1480 detachstack(c);
1481 c->mon = m;
1482 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1483 attach(c);
1484 attachstack(c);
1485 focus(NULL);
1486 arrange(NULL);
1487 }
1488
1489 void
1490 setclientstate(Client *c, long state) {
1491 long data[] = { state, None };
1492
1493 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1494 PropModeReplace, (unsigned char *)data, 2);
1495 }
1496
1497 Bool
1498 sendevent(Client *c, Atom proto) {
1499 int n;
1500 Atom *protocols;
1501 Bool exists = False;
1502 XEvent ev;
1503
1504 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1505 while(!exists && n--)
1506 exists = protocols[n] == proto;
1507 XFree(protocols);
1508 }
1509 if(exists) {
1510 ev.type = ClientMessage;
1511 ev.xclient.window = c->win;
1512 ev.xclient.message_type = wmatom[WMProtocols];
1513 ev.xclient.format = 32;
1514 ev.xclient.data.l[0] = proto;
1515 ev.xclient.data.l[1] = CurrentTime;
1516 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1517 }
1518 return exists;
1519 }
1520
1521 void
1522 setfocus(Client *c) {
1523 if(!c->neverfocus)
1524 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1525 sendevent(c, wmatom[WMTakeFocus]);
1526 }
1527
1528 void
1529 setfullscreen(Client *c, Bool fullscreen) {
1530 if(fullscreen) {
1531 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1532 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1533 c->isfullscreen = True;
1534 c->oldstate = c->isfloating;
1535 c->oldbw = c->bw;
1536 c->bw = 0;
1537 c->isfloating = True;
1538 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1539 XRaiseWindow(dpy, c->win);
1540 }
1541 else {
1542 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1543 PropModeReplace, (unsigned char*)0, 0);
1544 c->isfullscreen = False;
1545 c->isfloating = c->oldstate;
1546 c->bw = c->oldbw;
1547 c->x = c->oldx;
1548 c->y = c->oldy;
1549 c->w = c->oldw;
1550 c->h = c->oldh;
1551 resizeclient(c, c->x, c->y, c->w, c->h);
1552 arrange(c->mon);
1553 }
1554 }
1555
1556 void
1557 setlayout(const Arg *arg) {
1558 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1559 selmon->sellt ^= 1;
1560 if(arg && arg->v)
1561 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1562 strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1563 if(selmon->sel)
1564 arrange(selmon);
1565 else
1566 drawbar(selmon);
1567 }
1568
1569 /* arg > 1.0 will set mfact absolutly */
1570 void
1571 setmfact(const Arg *arg) {
1572 float f;
1573
1574 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1575 return;
1576 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1577 if(f < 0.1 || f > 0.9)
1578 return;
1579 selmon->mfact = f;
1580 arrange(selmon);
1581 }
1582
1583 void
1584 setup(void) {
1585 XSetWindowAttributes wa;
1586
1587 /* clean up any zombies immediately */
1588 sigchld(0);
1589
1590 /* init screen */
1591 screen = DefaultScreen(dpy);
1592 root = RootWindow(dpy, screen);
1593 initfont(font);
1594 sw = DisplayWidth(dpy, screen);
1595 sh = DisplayHeight(dpy, screen);
1596 bh = dc.h = dc.font.height + 2;
1597 updategeom();
1598 /* init atoms */
1599 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1600 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1601 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1602 wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1603 netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1604 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1605 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1606 netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1607 netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1608 netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1609 netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1610 /* init cursors */
1611 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1612 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1613 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1614 /* init appearance */
1615 dc.norm[ColBorder] = getcolor(normbordercolor);
1616 dc.norm[ColBG] = getcolor(normbgcolor);
1617 dc.norm[ColFG] = getcolor(normfgcolor);
1618 dc.sel[ColBorder] = getcolor(selbordercolor);
1619 dc.sel[ColBG] = getcolor(selbgcolor);
1620 dc.sel[ColFG] = getcolor(selfgcolor);
1621 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1622 dc.gc = XCreateGC(dpy, root, 0, NULL);
1623 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1624 if(!dc.font.set)
1625 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1626 /* init bars */
1627 updatebars();
1628 updatestatus();
1629 /* EWMH support per view */
1630 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1631 PropModeReplace, (unsigned char *) netatom, NetLast);
1632 /* select for events */
1633 wa.cursor = cursor[CurNormal];
1634 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1635 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1636 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1637 XSelectInput(dpy, root, wa.event_mask);
1638 grabkeys();
1639 }
1640
1641 void
1642 showhide(Client *c) {
1643 if(!c)
1644 return;
1645 if(ISVISIBLE(c)) { /* show clients top down */
1646 XMoveWindow(dpy, c->win, c->x, c->y);
1647 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1648 resize(c, c->x, c->y, c->w, c->h, False);
1649 showhide(c->snext);
1650 }
1651 else { /* hide clients bottom up */
1652 showhide(c->snext);
1653 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1654 }
1655 }
1656
1657 void
1658 sigchld(int unused) {
1659 if(signal(SIGCHLD, sigchld) == SIG_ERR)
1660 die("Can't install SIGCHLD handler");
1661 while(0 < waitpid(-1, NULL, WNOHANG));
1662 }
1663
1664 void
1665 spawn(const Arg *arg) {
1666 if(fork() == 0) {
1667 if(dpy)
1668 close(ConnectionNumber(dpy));
1669 setsid();
1670 execvp(((char **)arg->v)[0], (char **)arg->v);
1671 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1672 perror(" failed");
1673 exit(EXIT_SUCCESS);
1674 }
1675 }
1676
1677 void
1678 tag(const Arg *arg) {
1679 if(selmon->sel && arg->ui & TAGMASK) {
1680 selmon->sel->tags = arg->ui & TAGMASK;
1681 focus(NULL);
1682 arrange(selmon);
1683 }
1684 }
1685
1686 void
1687 tagmon(const Arg *arg) {
1688 if(!selmon->sel || !mons->next)
1689 return;
1690 sendmon(selmon->sel, dirtomon(arg->i));
1691 }
1692
1693 int
1694 textnw(const char *text, unsigned int len) {
1695 XRectangle r;
1696
1697 if(dc.font.set) {
1698 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1699 return r.width;
1700 }
1701 return XTextWidth(dc.font.xfont, text, len);
1702 }
1703
1704 void
1705 tile(Monitor *m) {
1706 unsigned int i, n, h, mw, my, ty;
1707 Client *c;
1708
1709 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1710 if(n == 0)
1711 return;
1712
1713 if(n > m->nmaster)
1714 mw = m->nmaster ? m->ww * m->mfact : 0;
1715 else
1716 mw = m->ww;
1717 for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1718 if(i < m->nmaster) {
1719 h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1720 resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False);
1721 my += HEIGHT(c);
1722 }
1723 else {
1724 h = (m->wh - ty) / (n - i);
1725 resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False);
1726 ty += HEIGHT(c);
1727 }
1728 }
1729
1730 void
1731 togglebar(const Arg *arg) {
1732 selmon->showbar = !selmon->showbar;
1733 updatebarpos(selmon);
1734 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1735 arrange(selmon);
1736 }
1737
1738 void
1739 togglefloating(const Arg *arg) {
1740 if(!selmon->sel)
1741 return;
1742 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1743 if(selmon->sel->isfloating)
1744 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1745 selmon->sel->w, selmon->sel->h, False);
1746 arrange(selmon);
1747 }
1748
1749 void
1750 toggletag(const Arg *arg) {
1751 unsigned int newtags;
1752
1753 if(!selmon->sel)
1754 return;
1755 newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1756 if(newtags) {
1757 selmon->sel->tags = newtags;
1758 focus(NULL);
1759 arrange(selmon);
1760 }
1761 }
1762
1763 void
1764 toggleview(const Arg *arg) {
1765 unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1766
1767 if(newtagset) {
1768 selmon->tagset[selmon->seltags] = newtagset;
1769 focus(NULL);
1770 arrange(selmon);
1771 }
1772 }
1773
1774 void
1775 unfocus(Client *c, Bool setfocus) {
1776 if(!c)
1777 return;
1778 grabbuttons(c, False);
1779 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1780 if(setfocus)
1781 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1782 }
1783
1784 void
1785 unmanage(Client *c, Bool destroyed) {
1786 Monitor *m = c->mon;
1787 XWindowChanges wc;
1788
1789 /* The server grab construct avoids race conditions. */
1790 detach(c);
1791 detachstack(c);
1792 if(!destroyed) {
1793 wc.border_width = c->oldbw;
1794 XGrabServer(dpy);
1795 XSetErrorHandler(xerrordummy);
1796 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1797 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1798 setclientstate(c, WithdrawnState);
1799 XSync(dpy, False);
1800 XSetErrorHandler(xerror);
1801 XUngrabServer(dpy);
1802 }
1803 free(c);
1804 focus(NULL);
1805 arrange(m);
1806 }
1807
1808 void
1809 unmapnotify(XEvent *e) {
1810 Client *c;
1811 XUnmapEvent *ev = &e->xunmap;
1812
1813 if((c = wintoclient(ev->window))) {
1814 if(ev->send_event)
1815 setclientstate(c, WithdrawnState);
1816 else
1817 unmanage(c, False);
1818 }
1819 }
1820
1821 void
1822 updatebars(void) {
1823 Monitor *m;
1824 XSetWindowAttributes wa = {
1825 .override_redirect = True,
1826 .background_pixmap = ParentRelative,
1827 .event_mask = ButtonPressMask|ExposureMask
1828 };
1829 for(m = mons; m; m = m->next) {
1830 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1831 CopyFromParent, DefaultVisual(dpy, screen),
1832 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1833 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1834 XMapRaised(dpy, m->barwin);
1835 }
1836 }
1837
1838 void
1839 updatebarpos(Monitor *m) {
1840 m->wy = m->my;
1841 m->wh = m->mh;
1842 if(m->showbar) {
1843 m->wh -= bh;
1844 m->by = m->topbar ? m->wy : m->wy + m->wh;
1845 m->wy = m->topbar ? m->wy + bh : m->wy;
1846 }
1847 else
1848 m->by = -bh;
1849 }
1850
1851 Bool
1852 updategeom(void) {
1853 Bool dirty = False;
1854
1855 #ifdef XINERAMA
1856 if(XineramaIsActive(dpy)) {
1857 int i, j, n, nn;
1858 Client *c;
1859 Monitor *m;
1860 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1861 XineramaScreenInfo *unique = NULL;
1862
1863 for(n = 0, m = mons; m; m = m->next, n++);
1864 /* only consider unique geometries as separate screens */
1865 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
1866 die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
1867 for(i = 0, j = 0; i < nn; i++)
1868 if(isuniquegeom(unique, j, &info[i]))
1869 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1870 XFree(info);
1871 nn = j;
1872 if(n <= nn) {
1873 for(i = 0; i < (nn - n); i++) { /* new monitors available */
1874 for(m = mons; m && m->next; m = m->next);
1875 if(m)
1876 m->next = createmon();
1877 else
1878 mons = createmon();
1879 }
1880 for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1881 if(i >= n
1882 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1883 || unique[i].width != m->mw || unique[i].height != m->mh))
1884 {
1885 dirty = True;
1886 m->num = i;
1887 m->mx = m->wx = unique[i].x_org;
1888 m->my = m->wy = unique[i].y_org;
1889 m->mw = m->ww = unique[i].width;
1890 m->mh = m->wh = unique[i].height;
1891 updatebarpos(m);
1892 }
1893 }
1894 else { /* less monitors available nn < n */
1895 for(i = nn; i < n; i++) {
1896 for(m = mons; m && m->next; m = m->next);
1897 while(m->clients) {
1898 dirty = True;
1899 c = m->clients;
1900 m->clients = c->next;
1901 detachstack(c);
1902 c->mon = mons;
1903 attach(c);
1904 attachstack(c);
1905 }
1906 if(m == selmon)
1907 selmon = mons;
1908 cleanupmon(m);
1909 }
1910 }
1911 free(unique);
1912 }
1913 else
1914 #endif /* XINERAMA */
1915 /* default monitor setup */
1916 {
1917 if(!mons)
1918 mons = createmon();
1919 if(mons->mw != sw || mons->mh != sh) {
1920 dirty = True;
1921 mons->mw = mons->ww = sw;
1922 mons->mh = mons->wh = sh;
1923 updatebarpos(mons);
1924 }
1925 }
1926 if(dirty) {
1927 selmon = mons;
1928 selmon = wintomon(root);
1929 }
1930 return dirty;
1931 }
1932
1933 void
1934 updatenumlockmask(void) {
1935 unsigned int i, j;
1936 XModifierKeymap *modmap;
1937
1938 numlockmask = 0;
1939 modmap = XGetModifierMapping(dpy);
1940 for(i = 0; i < 8; i++)
1941 for(j = 0; j < modmap->max_keypermod; j++)
1942 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1943 == XKeysymToKeycode(dpy, XK_Num_Lock))
1944 numlockmask = (1 << i);
1945 XFreeModifiermap(modmap);
1946 }
1947
1948 void
1949 updatesizehints(Client *c) {
1950 long msize;
1951 XSizeHints size;
1952
1953 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1954 /* size is uninitialized, ensure that size.flags aren't used */
1955 size.flags = PSize;
1956 if(size.flags & PBaseSize) {
1957 c->basew = size.base_width;
1958 c->baseh = size.base_height;
1959 }
1960 else if(size.flags & PMinSize) {
1961 c->basew = size.min_width;
1962 c->baseh = size.min_height;
1963 }
1964 else
1965 c->basew = c->baseh = 0;
1966 if(size.flags & PResizeInc) {
1967 c->incw = size.width_inc;
1968 c->inch = size.height_inc;
1969 }
1970 else
1971 c->incw = c->inch = 0;
1972 if(size.flags & PMaxSize) {
1973 c->maxw = size.max_width;
1974 c->maxh = size.max_height;
1975 }
1976 else
1977 c->maxw = c->maxh = 0;
1978 if(size.flags & PMinSize) {
1979 c->minw = size.min_width;
1980 c->minh = size.min_height;
1981 }
1982 else if(size.flags & PBaseSize) {
1983 c->minw = size.base_width;
1984 c->minh = size.base_height;
1985 }
1986 else
1987 c->minw = c->minh = 0;
1988 if(size.flags & PAspect) {
1989 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1990 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1991 }
1992 else
1993 c->maxa = c->mina = 0.0;
1994 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1995 && c->maxw == c->minw && c->maxh == c->minh);
1996 }
1997
1998 void
1999 updatetitle(Client *c) {
2000 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2001 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2002 if(c->name[0] == '\0') /* hack to mark broken clients */
2003 strcpy(c->name, broken);
2004 }
2005
2006 void
2007 updatestatus(void) {
2008 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2009 strcpy(stext, "dwm-"VERSION);
2010 drawbar(selmon);
2011 }
2012
2013 void
2014 updatewindowtype(Client *c) {
2015 Atom state = getatomprop(c, netatom[NetWMState]);
2016 Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2017
2018 if(state == netatom[NetWMFullscreen])
2019 setfullscreen(c, True);
2020
2021 if(wtype == netatom[NetWMWindowTypeDialog])
2022 c->isfloating = True;
2023 }
2024
2025 void
2026 updatewmhints(Client *c) {
2027 XWMHints *wmh;
2028
2029 if((wmh = XGetWMHints(dpy, c->win))) {
2030 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
2031 wmh->flags &= ~XUrgencyHint;
2032 XSetWMHints(dpy, c->win, wmh);
2033 }
2034 else
2035 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
2036 if(wmh->flags & InputHint)
2037 c->neverfocus = !wmh->input;
2038 else
2039 c->neverfocus = False;
2040 XFree(wmh);
2041 }
2042 }
2043
2044 void
2045 view(const Arg *arg) {
2046 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2047 return;
2048 selmon->seltags ^= 1; /* toggle sel tagset */
2049 if(arg->ui & TAGMASK)
2050 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2051 focus(NULL);
2052 arrange(selmon);
2053 }
2054
2055 Client *
2056 wintoclient(Window w) {
2057 Client *c;
2058 Monitor *m;
2059
2060 for(m = mons; m; m = m->next)
2061 for(c = m->clients; c; c = c->next)
2062 if(c->win == w)
2063 return c;
2064 return NULL;
2065 }
2066
2067 Monitor *
2068 wintomon(Window w) {
2069 int x, y;
2070 Client *c;
2071 Monitor *m;
2072
2073 if(w == root && getrootptr(&x, &y))
2074 return recttomon(x, y, 1, 1);
2075 for(m = mons; m; m = m->next)
2076 if(w == m->barwin)
2077 return m;
2078 if((c = wintoclient(w)))
2079 return c->mon;
2080 return selmon;
2081 }
2082
2083 /* There's no way to check accesses to destroyed windows, thus those cases are
2084 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2085 * default error handler, which may call exit. */
2086 int
2087 xerror(Display *dpy, XErrorEvent *ee) {
2088 if(ee->error_code == BadWindow
2089 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2090 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2091 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2092 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2093 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2094 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2095 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2096 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2097 return 0;
2098 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2099 ee->request_code, ee->error_code);
2100 return xerrorxlib(dpy, ee); /* may call exit */
2101 }
2102
2103 int
2104 xerrordummy(Display *dpy, XErrorEvent *ee) {
2105 return 0;
2106 }
2107
2108 /* Startup Error handler to check if another window manager
2109 * is already running. */
2110 int
2111 xerrorstart(Display *dpy, XErrorEvent *ee) {
2112 die("dwm: another window manager is already running\n");
2113 return -1;
2114 }
2115
2116 void
2117 zoom(const Arg *arg) {
2118 Client *c = selmon->sel;
2119
2120 if(!selmon->lt[selmon->sellt]->arrange
2121 || (selmon->sel && selmon->sel->isfloating))
2122 return;
2123 if(c == nexttiled(selmon->clients))
2124 if(!c || !(c = nexttiled(c->next)))
2125 return;
2126 pop(c);
2127 }
2128
2129 int
2130 main(int argc, char *argv[]) {
2131 if(argc == 2 && !strcmp("-v", argv[1]))
2132 die("dwm-"VERSION", © 2006-2011 dwm engineers, see LICENSE for details\n");
2133 else if(argc != 1)
2134 die("usage: dwm [-v]\n");
2135 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2136 fputs("warning: no locale support\n", stderr);
2137 if(!(dpy = XOpenDisplay(NULL)))
2138 die("dwm: cannot open display\n");
2139 checkotherwm();
2140 setup();
2141 scan();
2142 run();
2143 cleanup();
2144 XCloseDisplay(dpy);
2145 return EXIT_SUCCESS;
2146 }