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 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26#include <errno.h>
27#include <locale.h>
28#include <stdarg.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33#include <sys/select.h>
34#include <sys/types.h>
35#include <sys/wait.h>
36#include <regex.h>
37#include <X11/cursorfont.h>
38#include <X11/keysym.h>
39#include <X11/Xatom.h>
40#include <X11/Xlib.h>
41#include <X11/Xproto.h>
42#include <X11/Xutil.h>
43//#ifdef XINERAMA
44#include <X11/extensions/Xinerama.h>
45//#endif
46
47/* macros */
48#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
49#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
50#define LENGTH(x) (sizeof x / sizeof x[0])
51#define MAXTAGLEN 16
52#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53
54
55/* enums */
56enum { BarTop, BarBot, BarOff }; /* bar position */
57enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
58enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
59enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
60enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
61
62/* typedefs */
63typedef struct View View;
64typedef struct Client Client;
65struct Client {
66 char name[256];
67 int x, y, w, h;
68 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
69 int minax, maxax, minay, maxay;
70 long flags;
71 unsigned int border, oldborder;
72 Bool isbanned, isfixed, isfloating, isurgent;
73 Bool *tags;
74 Client *next;
75 Client *prev;
76 Client *snext;
77 Window win;
78};
79
80typedef struct {
81 int x, y, w, h;
82 unsigned long norm[ColLast];
83 unsigned long sel[ColLast];
84 Drawable drawable;
85 GC gc;
86 struct {
87 int ascent;
88 int descent;
89 int height;
90 XFontSet set;
91 XFontStruct *xfont;
92 } font;
93} DC; /* draw context */
94
95typedef struct {
96 unsigned long mod;
97 KeySym keysym;
98 void (*func)(const char *arg);
99 const char *arg;
100} Key;
101
102typedef struct {
103 const char *symbol;
104 void (*arrange)(View *);
105} Layout;
106
107typedef struct {
108 const char *prop;
109 const char *tag;
110 Bool isfloating;
111} Rule;
112
113struct View {
114 unsigned int id;
115 int x, y, w, h, wax, way, wah, waw;
116 double mwfact;
117 Layout *layout;
118 Window barwin;
119};
120
121/* function declarations */
122void applyrules(Client *c);
123void arrange(void);
124void attach(Client *c);
125void attachstack(Client *c);
126void ban(Client *c);
127void buttonpress(XEvent *e);
128void checkotherwm(void);
129void cleanup(void);
130void configure(Client *c);
131void configurenotify(XEvent *e);
132void configurerequest(XEvent *e);
133Bool conflicts(Client *c, unsigned int tidx);
134void destroynotify(XEvent *e);
135void detach(Client *c);
136void detachstack(Client *c);
137void drawbar(View *v);
138void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
139void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
140void *emallocz(unsigned int size);
141void enternotify(XEvent *e);
142void eprint(const char *errstr, ...);
143void expose(XEvent *e);
144unsigned int firstag(View *v);
145void floating(View *v); /* default floating layout */
146void focus(Client *c);
147void focusin(XEvent *e);
148void focusnext(const char *arg);
149void focusprev(const char *arg);
150Client *getclient(Window w);
151unsigned long getcolor(const char *colstr);
152View *getview(Client *c);
153View *getviewbar(Window barwin);
154long getstate(Window w);
155Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
156void grabbuttons(Client *c, Bool focused);
157void grabkeys(void);
158unsigned int idxoftag(const char *t);
159void initfont(const char *fontstr);
160Bool isoccupied(unsigned int t);
161Bool isprotodel(Client *c);
162Bool isurgent(unsigned int t);
163Bool isvisible(Client *c);
164void keypress(XEvent *e);
165void killclient(const char *arg);
166void manage(Window w, XWindowAttributes *wa);
167void mappingnotify(XEvent *e);
168void maprequest(XEvent *e);
169View *viewat(void);
170void movemouse(Client *c);
171Client *nexttiled(Client *c, View *v);
172void propertynotify(XEvent *e);
173void quit(const char *arg);
174void reapply(const char *arg);
175void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
176void resizemouse(Client *c);
177void restack(View *v);
178void run(void);
179void scan(void);
180void setclientstate(Client *c, long state);
181void setlayout(const char *arg);
182void setmwfact(const char *arg);
183void setup(void);
184void spawn(const char *arg);
185void tag(const char *arg);
186unsigned int textnw(const char *text, unsigned int len);
187unsigned int textw(const char *text);
188void tile(View *v);
189void togglebar(const char *arg);
190void togglefloating(const char *arg);
191void toggletag(const char *arg);
192void toggleview(const char *arg);
193void unban(Client *c);
194void unmanage(Client *c);
195void unmapnotify(XEvent *e);
196void updatebarpos(View *v);
197void updatesizehints(Client *c);
198void updatetitle(Client *c);
199void updatewmhints(Client *c);
200void view(const char *arg);
201void viewprevtag(const char *arg); /* views previous selected tags */
202int xerror(Display *dpy, XErrorEvent *ee);
203int xerrordummy(Display *dpy, XErrorEvent *ee);
204int xerrorstart(Display *dpy, XErrorEvent *ee);
205void zoom(const char *arg);
206void selectview(const char *arg);
207
208/* variables */
209char stext[256], buf[256];
210int nviews = 1;
211int screen;
212int (*xerrorxlib)(Display *, XErrorEvent *);
213unsigned int bh, bpos;
214unsigned int blw = 0;
215unsigned int numlockmask = 0;
216void (*handler[LASTEvent]) (XEvent *) = {
217 [ButtonPress] = buttonpress,
218 [ConfigureRequest] = configurerequest,
219 [ConfigureNotify] = configurenotify,
220 [DestroyNotify] = destroynotify,
221 [EnterNotify] = enternotify,
222 [Expose] = expose,
223 [FocusIn] = focusin,
224 [KeyPress] = keypress,
225 [MappingNotify] = mappingnotify,
226 [MapRequest] = maprequest,
227 [PropertyNotify] = propertynotify,
228 [UnmapNotify] = unmapnotify
229};
230Atom wmatom[WMLast], netatom[NetLast];
231Bool domwfact = True;
232Bool dozoom = True;
233Bool otherwm, readin;
234Bool running = True;
235Bool *prevtags;
236Bool *seltags;
237Client *clients = NULL;
238Client *sel = NULL;
239Client *stack = NULL;
240Cursor cursor[CurLast];
241Display *dpy;
242DC dc = {0};
243View *views;
244View *selview;
245Window root;
246
247/* configuration, allows nested code to access above variables */
248#include "config.h"
249#define TAGSZ (LENGTH(tags) * sizeof(Bool))
250
251/* function implementations */
252
253void
254applyrules(Client *c) {
255 unsigned int i, idx;
256 Bool matched = False;
257 Rule *r;
258 XClassHint ch = { 0 };
259
260 /* rule matching */
261 XGetClassHint(dpy, c->win, &ch);
262 for(i = 0; i < LENGTH(rules); i++) {
263 r = &rules[i];
264 if(strstr(c->name, r->prop)
265 || (ch.res_class && strstr(ch.res_class, r->prop))
266 || (ch.res_name && strstr(ch.res_name, r->prop)))
267 {
268 c->isfloating = r->isfloating;
269 if(r->tag && !conflicts(c, (idx = idxoftag(r->tag)))) {
270 c->tags[idx] = True;
271 matched = True;
272 }
273 }
274 }
275 if(ch.res_class)
276 XFree(ch.res_class);
277 if(ch.res_name)
278 XFree(ch.res_name);
279 if(!matched) {
280 for(i = 0; i < LENGTH(tags); i++)
281 if(seltags[i] && vtags[i] == selview->id)
282 c->tags[i] = True;
283 }
284}
285
286void
287arrange(void) {
288 unsigned int i;
289 Client *c;
290
291 for(c = clients; c; c = c->next)
292 if(isvisible(c))
293 unban(c);
294 else
295 ban(c);
296
297 for(i = 0; i < nviews; i++) {
298 views[i].layout->arrange(&views[i]);
299 restack(&views[i]);
300 }
301 focus(NULL);
302}
303
304void
305attach(Client *c) {
306 if(clients)
307 clients->prev = c;
308 c->next = clients;
309 clients = c;
310}
311
312void
313attachstack(Client *c) {
314 c->snext = stack;
315 stack = c;
316}
317
318void
319ban(Client *c) {
320 if(c->isbanned)
321 return;
322 XMoveWindow(dpy, c->win, c->x + 3 * getview(c)->w, c->y);
323 c->isbanned = True;
324}
325
326void
327buttonpress(XEvent *e) {
328 unsigned int i, x;
329 Client *c;
330 XButtonPressedEvent *ev = &e->xbutton;
331
332 if(ev->window == selview->barwin) {
333 x = 0;
334 for(i = 0; i < LENGTH(tags); i++) {
335 if(&views[vtags[i]] != selview)
336 continue;
337 x += textw(tags[i]);
338 if(ev->x < x) {
339 if(ev->button == Button1) {
340 if(ev->state & MODKEY)
341 tag(tags[i]);
342 else
343 view(tags[i]);
344 }
345 else if(ev->button == Button3) {
346 if(ev->state & MODKEY)
347 toggletag(tags[i]);
348 else
349 toggleview(tags[i]);
350 }
351 return;
352 }
353 }
354 if((ev->x < x + blw) && ev->button == Button1)
355 setlayout(NULL);
356 }
357 else if((c = getclient(ev->window))) {
358 focus(c);
359 if(CLEANMASK(ev->state) != MODKEY)
360 return;
361 if(ev->button == Button1) {
362 restack(getview(c));
363 movemouse(c);
364 }
365 else if(ev->button == Button2) {
366 if((floating != getview(c)->layout->arrange) && c->isfloating)
367 togglefloating(NULL);
368 else
369 zoom(NULL);
370 }
371 else if(ev->button == Button3 && !c->isfixed) {
372 restack(getview(c));
373 resizemouse(c);
374 }
375 }
376}
377
378void
379checkotherwm(void) {
380 otherwm = False;
381 XSetErrorHandler(xerrorstart);
382
383 /* this causes an error if some other window manager is running */
384 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
385 XSync(dpy, False);
386 if(otherwm)
387 eprint("dwm: another window manager is already running\n");
388 XSync(dpy, False);
389 XSetErrorHandler(NULL);
390 xerrorxlib = XSetErrorHandler(xerror);
391 XSync(dpy, False);
392}
393
394void
395cleanup(void) {
396 unsigned int i;
397 close(STDIN_FILENO);
398 while(stack) {
399 unban(stack);
400 unmanage(stack);
401 }
402 if(dc.font.set)
403 XFreeFontSet(dpy, dc.font.set);
404 else
405 XFreeFont(dpy, dc.font.xfont);
406
407 XUngrabKey(dpy, AnyKey, AnyModifier, root);
408 XFreePixmap(dpy, dc.drawable);
409 XFreeGC(dpy, dc.gc);
410 XFreeCursor(dpy, cursor[CurNormal]);
411 XFreeCursor(dpy, cursor[CurResize]);
412 XFreeCursor(dpy, cursor[CurMove]);
413 for(i = 0; i < nviews; i++)
414 XDestroyWindow(dpy, views[i].barwin);
415 XSync(dpy, False);
416 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
417}
418
419void
420configure(Client *c) {
421 XConfigureEvent ce;
422
423 ce.type = ConfigureNotify;
424 ce.display = dpy;
425 ce.event = c->win;
426 ce.window = c->win;
427 ce.x = c->x;
428 ce.y = c->y;
429 ce.width = c->w;
430 ce.height = c->h;
431 ce.border_width = c->border;
432 ce.above = None;
433 ce.override_redirect = False;
434 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
435}
436
437void
438configurenotify(XEvent *e) {
439 XConfigureEvent *ev = &e->xconfigure;
440 View *v = selview;
441
442 if(ev->window == root && (ev->width != v->w || ev->height != v->h)) {
443 /* TODO -- update Xinerama dimensions here */
444 v->w = ev->width;
445 v->h = ev->height;
446 XFreePixmap(dpy, dc.drawable);
447 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
448 XResizeWindow(dpy, v->barwin, v->w, bh);
449 updatebarpos(selview);
450 arrange();
451 }
452}
453
454void
455configurerequest(XEvent *e) {
456 Client *c;
457 XConfigureRequestEvent *ev = &e->xconfigurerequest;
458 XWindowChanges wc;
459
460 if((c = getclient(ev->window))) {
461 View *v = getview(c);
462 if(ev->value_mask & CWBorderWidth)
463 c->border = ev->border_width;
464 if(c->isfixed || c->isfloating || (floating == v->layout->arrange)) {
465 if(ev->value_mask & CWX)
466 c->x = v->x + ev->x;
467 if(ev->value_mask & CWY)
468 c->y = v->y + ev->y;
469 if(ev->value_mask & CWWidth)
470 c->w = ev->width;
471 if(ev->value_mask & CWHeight)
472 c->h = ev->height;
473 if((c->x - v->x + c->w) > v->w && c->isfloating)
474 c->x = v->x + (v->w / 2 - c->w / 2); /* center in x direction */
475 if((c->y - v->y + c->h) > v->h && c->isfloating)
476 c->y = v->y + (v->h / 2 - c->h / 2); /* center in y direction */
477 if((ev->value_mask & (CWX|CWY))
478 && !(ev->value_mask & (CWWidth|CWHeight)))
479 configure(c);
480 if(isvisible(c))
481 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
482 }
483 else
484 configure(c);
485 }
486 else {
487 wc.x = ev->x;
488 wc.y = ev->y;
489 wc.width = ev->width;
490 wc.height = ev->height;
491 wc.border_width = ev->border_width;
492 wc.sibling = ev->above;
493 wc.stack_mode = ev->detail;
494 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
495 }
496 XSync(dpy, False);
497}
498
499Bool
500conflicts(Client *c, unsigned int tidx) {
501 unsigned int i;
502
503 for(i = 0; i < LENGTH(tags); i++)
504 if(c->tags[i] && vtags[i] != vtags[tidx])
505 return True; /* conflict */
506 return False;
507}
508
509void
510destroynotify(XEvent *e) {
511 Client *c;
512 XDestroyWindowEvent *ev = &e->xdestroywindow;
513
514 if((c = getclient(ev->window)))
515 unmanage(c);
516}
517
518void
519detach(Client *c) {
520 if(c->prev)
521 c->prev->next = c->next;
522 if(c->next)
523 c->next->prev = c->prev;
524 if(c == clients)
525 clients = c->next;
526 c->next = c->prev = NULL;
527}
528
529void
530detachstack(Client *c) {
531 Client **tc;
532
533 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
534 *tc = c->snext;
535}
536
537void
538drawbar(View *v) {
539 int i, x;
540 Client *c;
541
542 dc.x = 0;
543 for(c = stack; c && (!isvisible(c) || getview(c) != v); c = c->snext);
544 for(i = 0; i < LENGTH(tags); i++) {
545 if(&views[vtags[i]] != v)
546 continue;
547 dc.w = textw(tags[i]);
548 if(seltags[i]) {
549 drawtext(tags[i], dc.sel, isurgent(i));
550 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
551 }
552 else {
553 drawtext(tags[i], dc.norm, isurgent(i));
554 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
555 }
556 dc.x += dc.w;
557 }
558 dc.w = blw;
559 drawtext(v->layout->symbol, dc.norm, False);
560 x = dc.x + dc.w;
561 if(v == selview) {
562 dc.w = textw(stext);
563 dc.x = v->w - dc.w;
564 if(dc.x < x) {
565 dc.x = x;
566 dc.w = v->w - x;
567 }
568 drawtext(stext, dc.norm, False);
569 }
570 else
571 dc.x = v->w;
572 if((dc.w = dc.x - x) > bh) {
573 dc.x = x;
574 if(c) {
575 drawtext(c->name, dc.sel, False);
576 drawsquare(False, c->isfloating, False, dc.sel);
577 }
578 else
579 drawtext(NULL, dc.norm, False);
580 }
581 XCopyArea(dpy, dc.drawable, v->barwin, dc.gc, 0, 0, v->w, bh, 0, 0);
582 XSync(dpy, False);
583}
584
585void
586drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
587 int x;
588 XGCValues gcv;
589 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
590
591 gcv.foreground = col[invert ? ColBG : ColFG];
592 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
593 x = (dc.font.ascent + dc.font.descent + 2) / 4;
594 r.x = dc.x + 1;
595 r.y = dc.y + 1;
596 if(filled) {
597 r.width = r.height = x + 1;
598 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
599 }
600 else if(empty) {
601 r.width = r.height = x;
602 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
603 }
604}
605
606void
607drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
608 int x, y, w, h;
609 unsigned int len, olen;
610 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
611
612 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
613 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
614 if(!text)
615 return;
616 w = 0;
617 olen = len = strlen(text);
618 if(len >= sizeof buf)
619 len = sizeof buf - 1;
620 memcpy(buf, text, len);
621 buf[len] = 0;
622 h = dc.font.ascent + dc.font.descent;
623 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
624 x = dc.x + (h / 2);
625 /* shorten text if necessary */
626 while(len && (w = textnw(buf, len)) > dc.w - h)
627 buf[--len] = 0;
628 if(len < olen) {
629 if(len > 1)
630 buf[len - 1] = '.';
631 if(len > 2)
632 buf[len - 2] = '.';
633 if(len > 3)
634 buf[len - 3] = '.';
635 }
636 if(w > dc.w)
637 return; /* too long */
638 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
639 if(dc.font.set)
640 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
641 else
642 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
643}
644
645void *
646emallocz(unsigned int size) {
647 void *res = calloc(1, size);
648
649 if(!res)
650 eprint("fatal: could not malloc() %u bytes\n", size);
651 return res;
652}
653
654void
655enternotify(XEvent *e) {
656 Client *c;
657 XCrossingEvent *ev = &e->xcrossing;
658
659 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
660 return;
661 if((c = getclient(ev->window)))
662 focus(c);
663 else
664 focus(NULL);
665}
666
667void
668eprint(const char *errstr, ...) {
669 va_list ap;
670
671 va_start(ap, errstr);
672 vfprintf(stderr, errstr, ap);
673 va_end(ap);
674 exit(EXIT_FAILURE);
675}
676
677void
678expose(XEvent *e) {
679 View *v;
680 XExposeEvent *ev = &e->xexpose;
681
682 if(ev->count == 0 && ((v = getviewbar(ev->window))))
683 drawbar(v);
684}
685
686unsigned int
687firstag(View *v) {
688 unsigned int i;
689
690 for(i = 0; i < LENGTH(tags); i++)
691 if(vtags[i] == v->id)
692 return i;
693 return 0; /* safe fallback */
694}
695
696void
697floating(View *v) { /* default floating layout */
698 Client *c;
699
700 domwfact = dozoom = False;
701 for(c = clients; c; c = c->next)
702 if(isvisible(c))
703 resize(c, c->x, c->y, c->w, c->h, True);
704}
705
706void
707focus(Client *c) {
708 View *v = selview;
709 if(c)
710 selview = getview(c);
711 if(selview != v)
712 drawbar(v);
713 if(!c || (c && !isvisible(c)))
714 /* TODO: isvisible might take getview(c) as constraint? */
715 for(c = stack; c && (!isvisible(c) || getview(c) != selview); c = c->snext);
716 if(sel && sel != c) {
717 grabbuttons(sel, False);
718 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
719 }
720 if(c) {
721 detachstack(c);
722 attachstack(c);
723 grabbuttons(c, True);
724 }
725 sel = c;
726 if(c) {
727 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
728 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
729 selview = getview(c);
730 }
731 else
732 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
733 drawbar(selview);
734}
735
736void
737focusin(XEvent *e) { /* there are some broken focus acquiring clients */
738 XFocusChangeEvent *ev = &e->xfocus;
739
740 if(sel && ev->window != sel->win)
741 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
742}
743
744void
745focusnext(const char *arg) {
746 Client *c;
747
748 if(!sel)
749 return;
750 for(c = sel->next; c && !isvisible(c); c = c->next);
751 if(!c)
752 for(c = clients; c && !isvisible(c); c = c->next);
753 if(c) {
754 focus(c);
755 restack(getview(c));
756 }
757}
758
759void
760focusprev(const char *arg) {
761 Client *c;
762
763 if(!sel)
764 return;
765 for(c = sel->prev; c && !isvisible(c); c = c->prev);
766 if(!c) {
767 for(c = clients; c && c->next; c = c->next);
768 for(; c && !isvisible(c); c = c->prev);
769 }
770 if(c) {
771 focus(c);
772 restack(getview(c));
773 }
774}
775
776Client *
777getclient(Window w) {
778 Client *c;
779
780 for(c = clients; c && c->win != w; c = c->next);
781 return c;
782}
783
784unsigned long
785getcolor(const char *colstr) {
786 Colormap cmap = DefaultColormap(dpy, screen);
787 XColor color;
788
789 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
790 eprint("error, cannot allocate color '%s'\n", colstr);
791 return color.pixel;
792}
793
794View *
795getview(Client *c) {
796 unsigned int i;
797
798 for(i = 0; i < LENGTH(tags); i++)
799 if(c->tags[i])
800 return &views[vtags[i]];
801 return NULL;
802}
803
804View *
805getviewbar(Window barwin) {
806 unsigned int i;
807
808 for(i = 0; i < nviews; i++)
809 if(views[i].barwin == barwin)
810 return &views[i];
811 return NULL;
812}
813
814long
815getstate(Window w) {
816 int format, status;
817 long result = -1;
818 unsigned char *p = NULL;
819 unsigned long n, extra;
820 Atom real;
821
822 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
823 &real, &format, &n, &extra, (unsigned char **)&p);
824 if(status != Success)
825 return -1;
826 if(n != 0)
827 result = *p;
828 XFree(p);
829 return result;
830}
831
832Bool
833gettextprop(Window w, Atom atom, char *text, unsigned int size) {
834 char **list = NULL;
835 int n;
836 XTextProperty name;
837
838 if(!text || size == 0)
839 return False;
840 text[0] = '\0';
841 XGetTextProperty(dpy, w, &name, atom);
842 if(!name.nitems)
843 return False;
844 if(name.encoding == XA_STRING)
845 strncpy(text, (char *)name.value, size - 1);
846 else {
847 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
848 && n > 0 && *list) {
849 strncpy(text, *list, size - 1);
850 XFreeStringList(list);
851 }
852 }
853 text[size - 1] = '\0';
854 XFree(name.value);
855 return True;
856}
857
858void
859grabbuttons(Client *c, Bool focused) {
860 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
861
862 if(focused) {
863 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
864 GrabModeAsync, GrabModeSync, None, None);
865 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
866 GrabModeAsync, GrabModeSync, None, None);
867 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
868 GrabModeAsync, GrabModeSync, None, None);
869 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
870 GrabModeAsync, GrabModeSync, None, None);
871
872 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
873 GrabModeAsync, GrabModeSync, None, None);
874 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
875 GrabModeAsync, GrabModeSync, None, None);
876 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
877 GrabModeAsync, GrabModeSync, None, None);
878 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
879 GrabModeAsync, GrabModeSync, None, None);
880
881 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
882 GrabModeAsync, GrabModeSync, None, None);
883 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
884 GrabModeAsync, GrabModeSync, None, None);
885 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
886 GrabModeAsync, GrabModeSync, None, None);
887 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
888 GrabModeAsync, GrabModeSync, None, None);
889 }
890 else
891 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
892 GrabModeAsync, GrabModeSync, None, None);
893}
894
895void
896grabkeys(void) {
897 unsigned int i, j;
898 KeyCode code;
899 XModifierKeymap *modmap;
900
901 /* init modifier map */
902 modmap = XGetModifierMapping(dpy);
903 for(i = 0; i < 8; i++)
904 for(j = 0; j < modmap->max_keypermod; j++) {
905 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
906 numlockmask = (1 << i);
907 }
908 XFreeModifiermap(modmap);
909
910 XUngrabKey(dpy, AnyKey, AnyModifier, root);
911 for(i = 0; i < LENGTH(keys); i++) {
912 code = XKeysymToKeycode(dpy, keys[i].keysym);
913 XGrabKey(dpy, code, keys[i].mod, root, True,
914 GrabModeAsync, GrabModeAsync);
915 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
916 GrabModeAsync, GrabModeAsync);
917 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
918 GrabModeAsync, GrabModeAsync);
919 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
920 GrabModeAsync, GrabModeAsync);
921 }
922}
923
924unsigned int
925idxoftag(const char *t) {
926 unsigned int i;
927
928 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
929 return (i < LENGTH(tags)) ? i : firstag(selview);
930}
931
932void
933initfont(const char *fontstr) {
934 char *def, **missing;
935 int i, n;
936
937 missing = NULL;
938 if(dc.font.set)
939 XFreeFontSet(dpy, dc.font.set);
940 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
941 if(missing) {
942 while(n--)
943 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
944 XFreeStringList(missing);
945 }
946 if(dc.font.set) {
947 XFontSetExtents *font_extents;
948 XFontStruct **xfonts;
949 char **font_names;
950 dc.font.ascent = dc.font.descent = 0;
951 font_extents = XExtentsOfFontSet(dc.font.set);
952 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
953 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
954 if(dc.font.ascent < (*xfonts)->ascent)
955 dc.font.ascent = (*xfonts)->ascent;
956 if(dc.font.descent < (*xfonts)->descent)
957 dc.font.descent = (*xfonts)->descent;
958 xfonts++;
959 }
960 }
961 else {
962 if(dc.font.xfont)
963 XFreeFont(dpy, dc.font.xfont);
964 dc.font.xfont = NULL;
965 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
966 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
967 eprint("error, cannot load font: '%s'\n", fontstr);
968 dc.font.ascent = dc.font.xfont->ascent;
969 dc.font.descent = dc.font.xfont->descent;
970 }
971 dc.font.height = dc.font.ascent + dc.font.descent;
972}
973
974Bool
975isoccupied(unsigned int t) {
976 Client *c;
977
978 for(c = clients; c; c = c->next)
979 if(c->tags[t])
980 return True;
981 return False;
982}
983
984Bool
985isprotodel(Client *c) {
986 int i, n;
987 Atom *protocols;
988 Bool ret = False;
989
990 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
991 for(i = 0; !ret && i < n; i++)
992 if(protocols[i] == wmatom[WMDelete])
993 ret = True;
994 XFree(protocols);
995 }
996 return ret;
997}
998
999Bool
1000isurgent(unsigned int t) {
1001 Client *c;
1002
1003 for(c = clients; c; c = c->next)
1004 if(c->isurgent && c->tags[t])
1005 return True;
1006 return False;
1007}
1008
1009Bool
1010isvisible(Client *c) {
1011 unsigned int i;
1012
1013 for(i = 0; i < LENGTH(tags); i++)
1014 if(c->tags[i] && seltags[i])
1015 return True;
1016 return False;
1017}
1018
1019void
1020keypress(XEvent *e) {
1021 unsigned int i;
1022 KeySym keysym;
1023 XKeyEvent *ev;
1024
1025 ev = &e->xkey;
1026 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1027 for(i = 0; i < LENGTH(keys); i++)
1028 if(keysym == keys[i].keysym
1029 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1030 {
1031 if(keys[i].func)
1032 keys[i].func(keys[i].arg);
1033 }
1034}
1035
1036void
1037killclient(const char *arg) {
1038 XEvent ev;
1039
1040 if(!sel)
1041 return;
1042 if(isprotodel(sel)) {
1043 ev.type = ClientMessage;
1044 ev.xclient.window = sel->win;
1045 ev.xclient.message_type = wmatom[WMProtocols];
1046 ev.xclient.format = 32;
1047 ev.xclient.data.l[0] = wmatom[WMDelete];
1048 ev.xclient.data.l[1] = CurrentTime;
1049 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1050 }
1051 else
1052 XKillClient(dpy, sel->win);
1053}
1054
1055void
1056manage(Window w, XWindowAttributes *wa) {
1057 Client *c, *t = NULL;
1058 View *v;
1059 Status rettrans;
1060 Window trans;
1061 XWindowChanges wc;
1062
1063 c = emallocz(sizeof(Client));
1064 c->tags = emallocz(TAGSZ);
1065 c->win = w;
1066
1067 applyrules(c);
1068
1069 v = getview(c);
1070
1071 c->x = wa->x + v->x;
1072 c->y = wa->y + v->y;
1073 c->w = wa->width;
1074 c->h = wa->height;
1075 c->oldborder = wa->border_width;
1076
1077 if(c->w == v->w && c->h == v->h) {
1078 c->x = v->x;
1079 c->y = v->y;
1080 c->border = wa->border_width;
1081 }
1082 else {
1083 if(c->x + c->w + 2 * c->border > v->wax + v->waw)
1084 c->x = v->wax + v->waw - c->w - 2 * c->border;
1085 if(c->y + c->h + 2 * c->border > v->way + v->wah)
1086 c->y = v->way + v->wah - c->h - 2 * c->border;
1087 if(c->x < v->wax)
1088 c->x = v->wax;
1089 if(c->y < v->way)
1090 c->y = v->way;
1091 c->border = BORDERPX;
1092 }
1093 wc.border_width = c->border;
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 updatetitle(c);
1101 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1102 for(t = clients; t && t->win != trans; t = t->next);
1103 if(t)
1104 memcpy(c->tags, t->tags, TAGSZ);
1105 if(!c->isfloating)
1106 c->isfloating = (rettrans == Success) || c->isfixed;
1107 attach(c);
1108 attachstack(c);
1109 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1110 ban(c);
1111 XMapWindow(dpy, c->win);
1112 setclientstate(c, NormalState);
1113 arrange();
1114}
1115
1116void
1117mappingnotify(XEvent *e) {
1118 XMappingEvent *ev = &e->xmapping;
1119
1120 XRefreshKeyboardMapping(ev);
1121 if(ev->request == MappingKeyboard)
1122 grabkeys();
1123}
1124
1125void
1126maprequest(XEvent *e) {
1127 static XWindowAttributes wa;
1128 XMapRequestEvent *ev = &e->xmaprequest;
1129
1130 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1131 return;
1132 if(wa.override_redirect)
1133 return;
1134 if(!getclient(ev->window))
1135 manage(ev->window, &wa);
1136}
1137
1138void
1139movemouse(Client *c) {
1140 int x1, y1, ocx, ocy, di, nx, ny;
1141 unsigned int dui;
1142 View *v;
1143 Window dummy;
1144 XEvent ev;
1145
1146 ocx = nx = c->x;
1147 ocy = ny = c->y;
1148 v = getview(c);
1149 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1150 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1151 return;
1152 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1153 for(;;) {
1154 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1155 switch (ev.type) {
1156 case ButtonRelease:
1157 XUngrabPointer(dpy, CurrentTime);
1158 return;
1159 case ConfigureRequest:
1160 case Expose:
1161 case MapRequest:
1162 handler[ev.type](&ev);
1163 break;
1164 case MotionNotify:
1165 XSync(dpy, False);
1166 nx = ocx + (ev.xmotion.x - x1);
1167 ny = ocy + (ev.xmotion.y - y1);
1168 if(abs(v->wax - nx) < SNAP)
1169 nx = v->wax;
1170 else if(abs((v->wax + v->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1171 nx = v->wax + v->waw - c->w - 2 * c->border;
1172 if(abs(v->way - ny) < SNAP)
1173 ny = v->way;
1174 else if(abs((v->way + v->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1175 ny = v->way + v->wah - c->h - 2 * c->border;
1176 if(!c->isfloating && (v->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1177 togglefloating(NULL);
1178 if((v->layout->arrange == floating) || c->isfloating)
1179 resize(c, nx, ny, c->w, c->h, False);
1180 break;
1181 }
1182 }
1183}
1184
1185Client *
1186nexttiled(Client *c, View *v) {
1187 for(; c && (c->isfloating || getview(c) != v || !isvisible(c)); c = c->next);
1188 return c;
1189}
1190
1191void
1192propertynotify(XEvent *e) {
1193 Client *c;
1194 Window trans;
1195 XPropertyEvent *ev = &e->xproperty;
1196
1197 if(ev->state == PropertyDelete)
1198 return; /* ignore */
1199 if((c = getclient(ev->window))) {
1200 switch (ev->atom) {
1201 default: break;
1202 case XA_WM_TRANSIENT_FOR:
1203 XGetTransientForHint(dpy, c->win, &trans);
1204 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1205 arrange();
1206 break;
1207 case XA_WM_NORMAL_HINTS:
1208 updatesizehints(c);
1209 break;
1210 case XA_WM_HINTS:
1211 updatewmhints(c);
1212 drawbar(getview(c));
1213 break;
1214 }
1215 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1216 updatetitle(c);
1217 if(c == sel)
1218 drawbar(selview);
1219 }
1220 }
1221}
1222
1223void
1224quit(const char *arg) {
1225 readin = running = False;
1226}
1227
1228void
1229reapply(const char *arg) {
1230 static Bool zerotags[LENGTH(tags)] = { 0 };
1231 Client *c;
1232
1233 for(c = clients; c; c = c->next) {
1234 memcpy(c->tags, zerotags, sizeof zerotags);
1235 applyrules(c);
1236 }
1237 arrange();
1238}
1239
1240void
1241resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1242 View *v;
1243 XWindowChanges wc;
1244
1245 v = getview(c);
1246 if(sizehints) {
1247 /* set minimum possible */
1248 if (w < 1)
1249 w = 1;
1250 if (h < 1)
1251 h = 1;
1252
1253 /* temporarily remove base dimensions */
1254 w -= c->basew;
1255 h -= c->baseh;
1256
1257 /* adjust for aspect limits */
1258 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1259 if (w * c->maxay > h * c->maxax)
1260 w = h * c->maxax / c->maxay;
1261 else if (w * c->minay < h * c->minax)
1262 h = w * c->minay / c->minax;
1263 }
1264
1265 /* adjust for increment value */
1266 if(c->incw)
1267 w -= w % c->incw;
1268 if(c->inch)
1269 h -= h % c->inch;
1270
1271 /* restore base dimensions */
1272 w += c->basew;
1273 h += c->baseh;
1274
1275 if(c->minw > 0 && w < c->minw)
1276 w = c->minw;
1277 if(c->minh > 0 && h < c->minh)
1278 h = c->minh;
1279 if(c->maxw > 0 && w > c->maxw)
1280 w = c->maxw;
1281 if(c->maxh > 0 && h > c->maxh)
1282 h = c->maxh;
1283 }
1284 if(w <= 0 || h <= 0)
1285 return;
1286 if(x > v->x + v->w)
1287 x = v->w - w - 2 * c->border;
1288 if(y > v->y + v->h)
1289 y = v->h - h - 2 * c->border;
1290 if(x + w + 2 * c->border < v->x)
1291 x = v->x;
1292 if(y + h + 2 * c->border < v->y)
1293 y = v->y;
1294 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1295 c->x = wc.x = x;
1296 c->y = wc.y = y;
1297 c->w = wc.width = w;
1298 c->h = wc.height = h;
1299 wc.border_width = c->border;
1300 XConfigureWindow(dpy, c->win,
1301 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1302 configure(c);
1303 XSync(dpy, False);
1304 }
1305}
1306
1307void
1308resizemouse(Client *c) {
1309 int ocx, ocy;
1310 int nw, nh;
1311 View *v;
1312 XEvent ev;
1313
1314 ocx = c->x;
1315 ocy = c->y;
1316 v = getview(c);
1317 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1318 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1319 return;
1320 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1321 for(;;) {
1322 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1323 switch(ev.type) {
1324 case ButtonRelease:
1325 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1326 c->w + c->border - 1, c->h + c->border - 1);
1327 XUngrabPointer(dpy, CurrentTime);
1328 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1329 return;
1330 case ConfigureRequest:
1331 case Expose:
1332 case MapRequest:
1333 handler[ev.type](&ev);
1334 break;
1335 case MotionNotify:
1336 XSync(dpy, False);
1337 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1338 nw = 1;
1339 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1340 nh = 1;
1341 if(!c->isfloating && (v->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1342 togglefloating(NULL);
1343 if((v->layout->arrange == floating) || c->isfloating)
1344 resize(c, c->x, c->y, nw, nh, True);
1345 break;
1346 }
1347 }
1348}
1349
1350void
1351restack(View *v) {
1352 Client *c;
1353 XEvent ev;
1354 XWindowChanges wc;
1355
1356 drawbar(v);
1357 if(!sel)
1358 return;
1359 if(sel->isfloating || (v->layout->arrange == floating))
1360 XRaiseWindow(dpy, sel->win);
1361 if(v->layout->arrange != floating) {
1362 wc.stack_mode = Below;
1363 wc.sibling = v->barwin;
1364 if(!sel->isfloating) {
1365 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1366 wc.sibling = sel->win;
1367 }
1368 for(c = nexttiled(clients, v); c; c = nexttiled(c->next, v)) {
1369 if(c == sel)
1370 continue;
1371 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1372 wc.sibling = c->win;
1373 }
1374 }
1375 XSync(dpy, False);
1376 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1377}
1378
1379void
1380run(void) {
1381 char *p;
1382 char sbuf[sizeof stext];
1383 fd_set rd;
1384 int r, xfd;
1385 unsigned int len, offset;
1386 XEvent ev;
1387
1388 /* main event loop, also reads status text from stdin */
1389 XSync(dpy, False);
1390 xfd = ConnectionNumber(dpy);
1391 readin = True;
1392 offset = 0;
1393 len = sizeof stext - 1;
1394 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1395 while(running) {
1396 FD_ZERO(&rd);
1397 if(readin)
1398 FD_SET(STDIN_FILENO, &rd);
1399 FD_SET(xfd, &rd);
1400 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1401 if(errno == EINTR)
1402 continue;
1403 eprint("select failed\n");
1404 }
1405 if(FD_ISSET(STDIN_FILENO, &rd)) {
1406 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1407 case -1:
1408 strncpy(stext, strerror(errno), len);
1409 readin = False;
1410 break;
1411 case 0:
1412 strncpy(stext, "EOF", 4);
1413 readin = False;
1414 break;
1415 default:
1416 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1417 if(*p == '\n' || *p == '\0') {
1418 *p = '\0';
1419 strncpy(stext, sbuf, len);
1420 p += r - 1; /* p is sbuf + offset + r - 1 */
1421 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1422 offset = r;
1423 if(r)
1424 memmove(sbuf, p - r + 1, r);
1425 break;
1426 }
1427 break;
1428 }
1429 drawbar(selview);
1430 }
1431 while(XPending(dpy)) {
1432 XNextEvent(dpy, &ev);
1433 if(handler[ev.type])
1434 (handler[ev.type])(&ev); /* call handler */
1435 }
1436 }
1437}
1438
1439void
1440scan(void) {
1441 unsigned int i, num;
1442 Window *wins, d1, d2;
1443 XWindowAttributes wa;
1444
1445 wins = NULL;
1446 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1447 for(i = 0; i < num; i++) {
1448 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1449 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1450 continue;
1451 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1452 manage(wins[i], &wa);
1453 }
1454 for(i = 0; i < num; i++) { /* now the transients */
1455 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1456 continue;
1457 if(XGetTransientForHint(dpy, wins[i], &d1)
1458 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1459 manage(wins[i], &wa);
1460 }
1461 }
1462 if(wins)
1463 XFree(wins);
1464}
1465
1466void
1467setclientstate(Client *c, long state) {
1468 long data[] = {state, None};
1469
1470 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1471 PropModeReplace, (unsigned char *)data, 2);
1472}
1473
1474void
1475setlayout(const char *arg) {
1476 unsigned int i;
1477 View *v = selview;
1478
1479 if(!arg) {
1480 v->layout++;
1481 if(v->layout == &layouts[LENGTH(layouts)])
1482 v->layout = &layouts[0];
1483 }
1484 else {
1485 for(i = 0; i < LENGTH(layouts); i++)
1486 if(!strcmp(arg, layouts[i].symbol))
1487 break;
1488 if(i == LENGTH(layouts))
1489 return;
1490 v->layout = &layouts[i];
1491 }
1492 if(sel)
1493 arrange();
1494 else
1495 drawbar(selview);
1496}
1497
1498void
1499setmwfact(const char *arg) {
1500 double delta;
1501 View *v = selview;
1502
1503 if(!domwfact)
1504 return;
1505 /* arg handling, manipulate mwfact */
1506 if(arg == NULL)
1507 v->mwfact = MWFACT;
1508 else if(sscanf(arg, "%lf", &delta) == 1) {
1509 if(arg[0] == '+' || arg[0] == '-')
1510 v->mwfact += delta;
1511 else
1512 v->mwfact = delta;
1513 if(v->mwfact < 0.1)
1514 v->mwfact = 0.1;
1515 else if(v->mwfact > 0.9)
1516 v->mwfact = 0.9;
1517 }
1518 arrange();
1519}
1520
1521void
1522setup(void) {
1523 unsigned int i, j;
1524 View *v;
1525 XSetWindowAttributes wa;
1526 XineramaScreenInfo *info = NULL;
1527
1528 /* init atoms */
1529 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1530 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1531 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1532 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1533 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1534 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1535
1536 /* init cursors */
1537 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1538 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1539 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1540
1541 if(XineramaIsActive(dpy))
1542 info = XineramaQueryScreens(dpy, &nviews);
1543
1544#if defined(AIM_XINERAMA)
1545nviews = 2; /* aim Xinerama */
1546#endif
1547 views = emallocz(nviews * sizeof(View));
1548
1549 screen = DefaultScreen(dpy);
1550 root = RootWindow(dpy, screen);
1551
1552 /* init appearance */
1553 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1554 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1555 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1556 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1557 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1558 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1559 initfont(FONT);
1560 dc.h = bh = dc.font.height + 2;
1561 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1562 dc.gc = XCreateGC(dpy, root, 0, 0);
1563 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1564 if(!dc.font.set)
1565 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1566
1567 for(blw = i = 0; i < LENGTH(layouts); i++) {
1568 i = textw(layouts[i].symbol);
1569 if(i > blw)
1570 blw = i;
1571 }
1572
1573 seltags = emallocz(TAGSZ);
1574 prevtags = emallocz(TAGSZ);
1575
1576 /* check, if vtags need assistance, because there is only 1 view */
1577 if(nviews == 1)
1578 for(i = 0; i < LENGTH(tags); i++)
1579 vtags[i] = 0;
1580
1581 for(i = 0; i < nviews; i++) {
1582 /* init geometry */
1583 v = &views[i];
1584 v->id = i;
1585
1586 /* select first tag of view */
1587 j = firstag(v);
1588 seltags[j] = prevtags[j] = True;
1589
1590 if(info) {
1591
1592#if defined(AIM_XINERAMA)
1593v->w = DisplayWidth(dpy, screen) / 2;
1594v->x = (i == 0) ? 0 : v->w;
1595v->y = 0;
1596v->h = DisplayHeight(dpy, screen);
1597#else
1598 v->x = info[i].x_org;
1599 v->y = info[i].y_org;
1600 v->w = info[i].width;
1601 v->h = info[i].height;
1602#endif
1603 }
1604 else {
1605 v->x = 0;
1606 v->y = 0;
1607 v->w = DisplayWidth(dpy, screen);
1608 v->h = DisplayHeight(dpy, screen);
1609 }
1610
1611 /* init layouts */
1612 v->mwfact = MWFACT;
1613 v->layout = &layouts[0];
1614
1615 // TODO: bpos per screen?
1616 bpos = BARPOS;
1617 wa.override_redirect = 1;
1618 wa.background_pixmap = ParentRelative;
1619 wa.event_mask = ButtonPressMask|ExposureMask;
1620
1621 /* init bars */
1622 v->barwin = XCreateWindow(dpy, root, v->x, v->y, v->w, bh, 0,
1623 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1624 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1625 XDefineCursor(dpy, v->barwin, cursor[CurNormal]);
1626 updatebarpos(v);
1627 XMapRaised(dpy, v->barwin);
1628 strcpy(stext, "dwm-"VERSION);
1629
1630 /* EWMH support per view */
1631 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1632 PropModeReplace, (unsigned char *) netatom, NetLast);
1633
1634 /* select for events */
1635 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1636 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1637 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1638 XSelectInput(dpy, root, wa.event_mask);
1639
1640 drawbar(v);
1641 }
1642 if(info)
1643 XFree(info);
1644
1645 selview = viewat();
1646
1647 /* grab keys */
1648 grabkeys();
1649}
1650
1651void
1652spawn(const char *arg) {
1653 static char *shell = NULL;
1654
1655 if(!shell && !(shell = getenv("SHELL")))
1656 shell = "/bin/sh";
1657 if(!arg)
1658 return;
1659 /* The double-fork construct avoids zombie processes and keeps the code
1660 * clean from stupid signal handlers. */
1661 if(fork() == 0) {
1662 if(fork() == 0) {
1663 if(dpy)
1664 close(ConnectionNumber(dpy));
1665 setsid();
1666 execl(shell, shell, "-c", arg, (char *)NULL);
1667 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1668 perror(" failed");
1669 }
1670 exit(0);
1671 }
1672 wait(0);
1673}
1674
1675void
1676tag(const char *arg) {
1677 unsigned int i;
1678
1679 if(!sel)
1680 return;
1681 for(i = 0; i < LENGTH(tags); i++)
1682 sel->tags[i] = (NULL == arg) && (vtags[i] == getview(sel)->id);
1683 i = idxoftag(arg);
1684 if(!conflicts(sel, i))
1685 sel->tags[idxoftag(arg)] = True;
1686 arrange();
1687}
1688
1689unsigned int
1690textnw(const char *text, unsigned int len) {
1691 XRectangle r;
1692
1693 if(dc.font.set) {
1694 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1695 return r.width;
1696 }
1697 return XTextWidth(dc.font.xfont, text, len);
1698}
1699
1700unsigned int
1701textw(const char *text) {
1702 return textnw(text, strlen(text)) + dc.font.height;
1703}
1704
1705void
1706tile(View *v) {
1707 unsigned int i, n, nx, ny, nw, nh, mw, th;
1708 Client *c, *mc;
1709
1710 domwfact = dozoom = True;
1711 nx = v->wax;
1712 ny = v->way;
1713 nw = 0;
1714 for(n = 0, c = nexttiled(clients, v); c; c = nexttiled(c->next, v))
1715 n++;
1716
1717 /* window geoms */
1718 mw = (n == 1) ? v->waw : v->mwfact * v->waw;
1719 th = (n > 1) ? v->wah / (n - 1) : 0;
1720 if(n > 1 && th < bh)
1721 th = v->wah;
1722
1723 for(i = 0, c = mc = nexttiled(clients, v); c; c = nexttiled(c->next, v)) {
1724 if(i == 0) { /* master */
1725 nw = mw - 2 * c->border;
1726 nh = v->wah - 2 * c->border;
1727 }
1728 else { /* tile window */
1729 if(i == 1) {
1730 ny = v->way;
1731 nx += mc->w + 2 * mc->border;
1732 nw = v->waw - mw - 2 * c->border;
1733 }
1734 if(i + 1 == n) /* remainder */
1735 nh = (v->way + v->wah) - ny - 2 * c->border;
1736 else
1737 nh = th - 2 * c->border;
1738 }
1739 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1740 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1741 /* client doesn't accept size constraints */
1742 resize(c, nx, ny, nw, nh, False);
1743 if(n > 1 && th != v->wah)
1744 ny = c->y + c->h + 2 * c->border;
1745 i++;
1746 }
1747}
1748
1749void
1750togglebar(const char *arg) {
1751 if(bpos == BarOff)
1752 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1753 else
1754 bpos = BarOff;
1755 updatebarpos(selview);
1756 arrange();
1757}
1758
1759void
1760togglefloating(const char *arg) {
1761 if(!sel)
1762 return;
1763 sel->isfloating = !sel->isfloating;
1764 if(sel->isfloating)
1765 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1766 arrange();
1767}
1768
1769void
1770toggletag(const char *arg) {
1771 unsigned int i, j;
1772
1773 if(!sel)
1774 return;
1775 i = idxoftag(arg);
1776 if(conflicts(sel, i))
1777 return;
1778 sel->tags[i] = !sel->tags[i];
1779 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1780 if(j == LENGTH(tags))
1781 sel->tags[i] = True; /* at least one tag must be enabled */
1782 arrange();
1783}
1784
1785void
1786toggleview(const char *arg) {
1787 unsigned int i, j;
1788
1789 i = idxoftag(arg);
1790 seltags[i] = !seltags[i];
1791 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1792 if(j == LENGTH(tags))
1793 seltags[i] = True; /* at least one tag must be viewed */
1794 arrange();
1795}
1796
1797void
1798unban(Client *c) {
1799 if(!c->isbanned)
1800 return;
1801 XMoveWindow(dpy, c->win, c->x, c->y);
1802 c->isbanned = False;
1803}
1804
1805void
1806unmanage(Client *c) {
1807 XWindowChanges wc;
1808
1809 wc.border_width = c->oldborder;
1810 /* The server grab construct avoids race conditions. */
1811 XGrabServer(dpy);
1812 XSetErrorHandler(xerrordummy);
1813 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1814 detach(c);
1815 detachstack(c);
1816 if(sel == c)
1817 focus(NULL);
1818 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1819 setclientstate(c, WithdrawnState);
1820 free(c->tags);
1821 free(c);
1822 XSync(dpy, False);
1823 XSetErrorHandler(xerror);
1824 XUngrabServer(dpy);
1825 arrange();
1826}
1827
1828void
1829unmapnotify(XEvent *e) {
1830 Client *c;
1831 XUnmapEvent *ev = &e->xunmap;
1832
1833 if((c = getclient(ev->window)))
1834 unmanage(c);
1835}
1836
1837void
1838updatebarpos(View *v) {
1839 XEvent ev;
1840
1841 v->wax = v->x;
1842 v->way = v->y;
1843 v->wah = v->h;
1844 v->waw = v->w;
1845 switch(bpos) {
1846 default:
1847 v->wah -= bh;
1848 v->way += bh;
1849 XMoveWindow(dpy, v->barwin, v->x, v->y);
1850 break;
1851 case BarBot:
1852 v->wah -= bh;
1853 XMoveWindow(dpy, v->barwin, v->x, v->y + v->wah);
1854 break;
1855 case BarOff:
1856 XMoveWindow(dpy, v->barwin, v->x, v->y - bh);
1857 break;
1858 }
1859 XSync(dpy, False);
1860 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1861}
1862
1863void
1864updatesizehints(Client *c) {
1865 long msize;
1866 XSizeHints size;
1867
1868 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1869 size.flags = PSize;
1870 c->flags = size.flags;
1871 if(c->flags & PBaseSize) {
1872 c->basew = size.base_width;
1873 c->baseh = size.base_height;
1874 }
1875 else if(c->flags & PMinSize) {
1876 c->basew = size.min_width;
1877 c->baseh = size.min_height;
1878 }
1879 else
1880 c->basew = c->baseh = 0;
1881 if(c->flags & PResizeInc) {
1882 c->incw = size.width_inc;
1883 c->inch = size.height_inc;
1884 }
1885 else
1886 c->incw = c->inch = 0;
1887 if(c->flags & PMaxSize) {
1888 c->maxw = size.max_width;
1889 c->maxh = size.max_height;
1890 }
1891 else
1892 c->maxw = c->maxh = 0;
1893 if(c->flags & PMinSize) {
1894 c->minw = size.min_width;
1895 c->minh = size.min_height;
1896 }
1897 else if(c->flags & PBaseSize) {
1898 c->minw = size.base_width;
1899 c->minh = size.base_height;
1900 }
1901 else
1902 c->minw = c->minh = 0;
1903 if(c->flags & PAspect) {
1904 c->minax = size.min_aspect.x;
1905 c->maxax = size.max_aspect.x;
1906 c->minay = size.min_aspect.y;
1907 c->maxay = size.max_aspect.y;
1908 }
1909 else
1910 c->minax = c->maxax = c->minay = c->maxay = 0;
1911 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1912 && c->maxw == c->minw && c->maxh == c->minh);
1913}
1914
1915void
1916updatetitle(Client *c) {
1917 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1918 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1919}
1920
1921void
1922updatewmhints(Client *c) {
1923 XWMHints *wmh;
1924
1925 if((wmh = XGetWMHints(dpy, c->win))) {
1926 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1927 XFree(wmh);
1928 }
1929}
1930
1931void
1932view(const char *arg) {
1933 unsigned int i, j;
1934 Bool tmp[LENGTH(tags)];
1935
1936 memcpy(tmp, seltags, TAGSZ);
1937 if(arg == NULL) {
1938 for(i = 0; i < LENGTH(tags); i++)
1939 tmp[i] = (vtags[i] == selview->id);
1940 }
1941 else {
1942 i = idxoftag(arg);
1943 for(j = 0; j < LENGTH(tags); j++)
1944 if(selview->id == vtags[i]) {
1945 /* view tag of selview */
1946 if(selview->id == vtags[j])
1947 tmp[j] = False;
1948 }
1949 else {
1950 /* only touch the view the focus should go */
1951 if(vtags[j] == vtags[i])
1952 tmp[j] = False;
1953 }
1954 selview = &views[vtags[i]];
1955 tmp[i] = True;
1956 }
1957 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1958 memcpy(prevtags, seltags, TAGSZ);
1959 memcpy(seltags, tmp, TAGSZ);
1960 arrange();
1961 }
1962}
1963
1964View *
1965viewat() {
1966 int i, x, y;
1967 Window win;
1968 unsigned int mask;
1969
1970 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1971 for(i = 0; i < nviews; i++) {
1972 if((x >= views[i].x && x < views[i].x + views[i].w)
1973 && (y >= views[i].y && y < views[i].y + views[i].h))
1974 return &views[i];
1975 }
1976 return NULL;
1977}
1978
1979void
1980viewprevtag(const char *arg) {
1981 static Bool tmp[LENGTH(tags)];
1982
1983 memcpy(tmp, seltags, TAGSZ);
1984 memcpy(seltags, prevtags, TAGSZ);
1985 memcpy(prevtags, tmp, TAGSZ);
1986 arrange();
1987}
1988
1989/* There's no way to check accesses to destroyed windows, thus those cases are
1990 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1991 * default error handler, which may call exit. */
1992int
1993xerror(Display *dpy, XErrorEvent *ee) {
1994 if(ee->error_code == BadWindow
1995 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1996 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1997 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1998 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1999 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2000 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2001 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2002 return 0;
2003 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2004 ee->request_code, ee->error_code);
2005 return xerrorxlib(dpy, ee); /* may call exit */
2006}
2007
2008int
2009xerrordummy(Display *dpy, XErrorEvent *ee) {
2010 return 0;
2011}
2012
2013/* Startup Error handler to check if another window manager
2014 * is already running. */
2015int
2016xerrorstart(Display *dpy, XErrorEvent *ee) {
2017 otherwm = True;
2018 return -1;
2019}
2020
2021void
2022zoom(const char *arg) {
2023 Client *c = sel;
2024
2025 if(!sel || !dozoom || sel->isfloating)
2026 return;
2027 if(c == nexttiled(clients, getview(c)))
2028 if(!(c = nexttiled(c->next, getview(c))))
2029 return;
2030 detach(c);
2031 attach(c);
2032 focus(c);
2033 arrange();
2034}
2035
2036int
2037main(int argc, char *argv[]) {
2038 if(argc == 2 && !strcmp("-v", argv[1]))
2039 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
2040 else if(argc != 1)
2041 eprint("usage: dwm [-v]\n");
2042
2043 setlocale(LC_CTYPE, "");
2044 if(!(dpy = XOpenDisplay(0)))
2045 eprint("dwm: cannot open display\n");
2046
2047 checkotherwm();
2048 setup();
2049 scan();
2050 run();
2051 cleanup();
2052
2053 XCloseDisplay(dpy);
2054 return 0;
2055}