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[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 * 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 a bit array to indicate the tags of a
20 * 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 <X11/cursorfont.h>
37 #include <X11/keysym.h>
38 #include <X11/Xatom.h>
39 #include <X11/Xlib.h>
40 #include <X11/Xproto.h>
41 #include <X11/Xutil.h>
42 #ifdef XINERAMA
43 #include <X11/extensions/Xinerama.h>
44 #endif
45
46 /* macros */
47 #define MAX(a, b) ((a) > (b) ? (a) : (b))
48 #define MIN(a, b) ((a) < (b) ? (a) : (b))
49 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
50 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
51 #define LENGTH(x) (sizeof x / sizeof x[0])
52 #define MAXTAGLEN 16
53 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
54 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55 #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
56 #define ISVISIBLE(x) (x->tags & tagset[seltags])
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
63 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66 typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 void *v;
71 } Arg;
72
73 typedef struct {
74 unsigned int click;
75 unsigned int mask;
76 unsigned int button;
77 void (*func)(const Arg *arg);
78 const Arg arg;
79 } Button;
80
81 typedef struct Client Client;
82 struct Client {
83 char name[256];
84 float mina, maxa;
85 int x, y, w, h;
86 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
87 int bw, oldbw;
88 unsigned int tags;
89 Bool isfixed, isfloating, isurgent;
90 Client *next;
91 Client *snext;
92 Window win;
93 };
94
95 typedef struct {
96 int x, y, w, h;
97 unsigned long norm[ColLast];
98 unsigned long sel[ColLast];
99 Drawable drawable;
100 GC gc;
101 struct {
102 int ascent;
103 int descent;
104 int height;
105 XFontSet set;
106 XFontStruct *xfont;
107 } font;
108 } DC; /* draw context */
109
110 typedef struct {
111 unsigned int mod;
112 KeySym keysym;
113 void (*func)(const Arg *);
114 const Arg arg;
115 } Key;
116
117 typedef struct {
118 const char *symbol;
119 void (*arrange)(void);
120 } Layout;
121
122 typedef struct {
123 const char *class;
124 const char *instance;
125 const char *title;
126 unsigned int tags;
127 Bool isfloating;
128 } Rule;
129
130 /* function declarations */
131 static void applyrules(Client *c);
132 static void arrange(void);
133 static void attach(Client *c);
134 static void attachstack(Client *c);
135 static void buttonpress(XEvent *e);
136 static void checkotherwm(void);
137 static void cleanup(void);
138 static void clearurgent(void);
139 static void configure(Client *c);
140 static void configurenotify(XEvent *e);
141 static void configurerequest(XEvent *e);
142 static void destroynotify(XEvent *e);
143 static void detach(Client *c);
144 static void detachstack(Client *c);
145 static void die(const char *errstr, ...);
146 static void drawbar(void);
147 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
148 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
149 static void enternotify(XEvent *e);
150 static void expose(XEvent *e);
151 static void focus(Client *c);
152 static void focusin(XEvent *e);
153 static void focusstack(const Arg *arg);
154 static Client *getclient(Window w);
155 static unsigned long getcolor(const char *colstr);
156 static long getstate(Window w);
157 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
158 static void grabbuttons(Client *c, Bool focused);
159 static void grabkeys(void);
160 static void initfont(const char *fontstr);
161 static Bool isoccupied(unsigned int t);
162 static Bool isprotodel(Client *c);
163 static Bool isurgent(unsigned int t);
164 static void keypress(XEvent *e);
165 static void killclient(const Arg *arg);
166 static void manage(Window w, XWindowAttributes *wa);
167 static void mappingnotify(XEvent *e);
168 static void maprequest(XEvent *e);
169 static void monocle(void);
170 static void movemouse(const Arg *arg);
171 static Client *nexttiled(Client *c);
172 static void propertynotify(XEvent *e);
173 static void quit(const Arg *arg);
174 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
175 static void resizemouse(const Arg *arg);
176 static void restack(void);
177 static void run(void);
178 static void scan(void);
179 static void setclientstate(Client *c, long state);
180 static void setlayout(const Arg *arg);
181 static void setmfact(const Arg *arg);
182 static void setup(void);
183 static void spawn(const Arg *arg);
184 static void tag(const Arg *arg);
185 static int textnw(const char *text, unsigned int len);
186 static void tile(void);
187 static void togglebar(const Arg *arg);
188 static void togglefloating(const Arg *arg);
189 static void toggletag(const Arg *arg);
190 static void toggleview(const Arg *arg);
191 static void unmanage(Client *c);
192 static void unmapnotify(XEvent *e);
193 static void updatebar(void);
194 static void updategeom(void);
195 static void updatesizehints(Client *c);
196 static void updatetitle(Client *c);
197 static void updatewmhints(Client *c);
198 static void view(const Arg *arg);
199 static int xerror(Display *dpy, XErrorEvent *ee);
200 static int xerrordummy(Display *dpy, XErrorEvent *ee);
201 static int xerrorstart(Display *dpy, XErrorEvent *ee);
202 static void zoom(const Arg *arg);
203
204 /* variables */
205 static char stext[256];
206 static int screen, sx, sy, sw, sh;
207 static int by, bh, blw, wx, wy, ww, wh;
208 static unsigned int seltags = 0, sellt = 0;
209 static int (*xerrorxlib)(Display *, XErrorEvent *);
210 static unsigned int numlockmask = 0;
211 static void (*handler[LASTEvent]) (XEvent *) = {
212 [ButtonPress] = buttonpress,
213 [ConfigureRequest] = configurerequest,
214 [ConfigureNotify] = configurenotify,
215 [DestroyNotify] = destroynotify,
216 [EnterNotify] = enternotify,
217 [Expose] = expose,
218 [FocusIn] = focusin,
219 [KeyPress] = keypress,
220 [MappingNotify] = mappingnotify,
221 [MapRequest] = maprequest,
222 [PropertyNotify] = propertynotify,
223 [UnmapNotify] = unmapnotify
224 };
225 static Atom wmatom[WMLast], netatom[NetLast];
226 static Bool otherwm, readin;
227 static Bool running = True;
228 static unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
229 static Client *clients = NULL;
230 static Client *sel = NULL;
231 static Client *stack = NULL;
232 static Cursor cursor[CurLast];
233 static Display *dpy;
234 static DC dc = {0};
235 static Layout *lt[] = { NULL, NULL };
236 static Window root, barwin;
237 /* configuration, allows nested code to access above variables */
238 #include "config.h"
239
240 /* compile-time check if all tags fit into an unsigned int bit array. */
241 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
242
243 /* function implementations */
244 void
245 applyrules(Client *c) {
246 unsigned int i;
247 Rule *r;
248 XClassHint ch = { 0 };
249
250 /* rule matching */
251 XGetClassHint(dpy, c->win, &ch);
252 for(i = 0; i < LENGTH(rules); i++) {
253 r = &rules[i];
254 if((!r->title || strstr(c->name, r->title))
255 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
256 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
257 c->isfloating = r->isfloating;
258 c->tags |= r->tags & TAGMASK;
259 }
260 }
261 if(ch.res_class)
262 XFree(ch.res_class);
263 if(ch.res_name)
264 XFree(ch.res_name);
265 if(!c->tags)
266 c->tags = tagset[seltags];
267 }
268
269 void
270 arrange(void) {
271 Client *c;
272
273 for(c = clients; c; c = c->next)
274 if(ISVISIBLE(c)) {
275 XMoveWindow(dpy, c->win, c->x, c->y);
276 if(!lt[sellt]->arrange || c->isfloating)
277 resize(c, c->x, c->y, c->w, c->h, True);
278 }
279 else {
280 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
281 }
282
283 focus(NULL);
284 if(lt[sellt]->arrange)
285 lt[sellt]->arrange();
286 restack();
287 }
288
289 void
290 attach(Client *c) {
291 c->next = clients;
292 clients = c;
293 }
294
295 void
296 attachstack(Client *c) {
297 c->snext = stack;
298 stack = c;
299 }
300
301 void
302 buttonpress(XEvent *e) {
303 unsigned int i, x, click;
304 Arg arg = {0};
305 Client *c;
306 XButtonPressedEvent *ev = &e->xbutton;
307
308 click = ClkRootWin;
309 if(ev->window == barwin) {
310 i = x = 0;
311 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
312 if(i < LENGTH(tags)) {
313 click = ClkTagBar;
314 arg.ui = 1 << i;
315 }
316 else if(ev->x < x + blw)
317 click = ClkLtSymbol;
318 else if(ev->x > wx + ww - TEXTW(stext))
319 click = ClkStatusText;
320 else
321 click = ClkWinTitle;
322 }
323 else if((c = getclient(ev->window))) {
324 focus(c);
325 click = ClkClientWin;
326 }
327
328 for(i = 0; i < LENGTH(buttons); i++)
329 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
330 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
331 buttons[i].func(click == ClkTagBar ? &arg : &buttons[i].arg);
332 }
333
334 void
335 checkotherwm(void) {
336 otherwm = False;
337 XSetErrorHandler(xerrorstart);
338
339 /* this causes an error if some other window manager is running */
340 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
341 XSync(dpy, False);
342 if(otherwm)
343 die("dwm: another window manager is already running\n");
344 XSetErrorHandler(NULL);
345 xerrorxlib = XSetErrorHandler(xerror);
346 XSync(dpy, False);
347 }
348
349 void
350 cleanup(void) {
351 Arg a = {.i = ~0};
352 Layout foo = { "", NULL };
353
354 close(STDIN_FILENO);
355 view(&a);
356 lt[sellt] = &foo;
357 while(stack)
358 unmanage(stack);
359 if(dc.font.set)
360 XFreeFontSet(dpy, dc.font.set);
361 else
362 XFreeFont(dpy, dc.font.xfont);
363 XUngrabKey(dpy, AnyKey, AnyModifier, root);
364 XFreePixmap(dpy, dc.drawable);
365 XFreeGC(dpy, dc.gc);
366 XFreeCursor(dpy, cursor[CurNormal]);
367 XFreeCursor(dpy, cursor[CurResize]);
368 XFreeCursor(dpy, cursor[CurMove]);
369 XDestroyWindow(dpy, barwin);
370 XSync(dpy, False);
371 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
372 }
373
374 void
375 clearurgent(void) {
376 XWMHints *wmh;
377 Client *c;
378
379 for(c = clients; c; c = c->next)
380 if(ISVISIBLE(c) && c->isurgent) {
381 c->isurgent = False;
382 if (!(wmh = XGetWMHints(dpy, c->win)))
383 continue;
384
385 wmh->flags &= ~XUrgencyHint;
386 XSetWMHints(dpy, c->win, wmh);
387 XFree(wmh);
388 }
389 }
390
391 void
392 configure(Client *c) {
393 XConfigureEvent ce;
394
395 ce.type = ConfigureNotify;
396 ce.display = dpy;
397 ce.event = c->win;
398 ce.window = c->win;
399 ce.x = c->x;
400 ce.y = c->y;
401 ce.width = c->w;
402 ce.height = c->h;
403 ce.border_width = c->bw;
404 ce.above = None;
405 ce.override_redirect = False;
406 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
407 }
408
409 void
410 configurenotify(XEvent *e) {
411 XConfigureEvent *ev = &e->xconfigure;
412
413 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
414 sw = ev->width;
415 sh = ev->height;
416 updategeom();
417 updatebar();
418 arrange();
419 }
420 }
421
422 void
423 configurerequest(XEvent *e) {
424 Client *c;
425 XConfigureRequestEvent *ev = &e->xconfigurerequest;
426 XWindowChanges wc;
427
428 if((c = getclient(ev->window))) {
429 if(ev->value_mask & CWBorderWidth)
430 c->bw = ev->border_width;
431 else if(c->isfloating || !lt[sellt]->arrange) {
432 if(ev->value_mask & CWX)
433 c->x = sx + ev->x;
434 if(ev->value_mask & CWY)
435 c->y = sy + ev->y;
436 if(ev->value_mask & CWWidth)
437 c->w = ev->width;
438 if(ev->value_mask & CWHeight)
439 c->h = ev->height;
440 if((c->x - sx + c->w) > sw && c->isfloating)
441 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
442 if((c->y - sy + c->h) > sh && c->isfloating)
443 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
444 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
445 configure(c);
446 if(ISVISIBLE(c))
447 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
448 }
449 else
450 configure(c);
451 }
452 else {
453 wc.x = ev->x;
454 wc.y = ev->y;
455 wc.width = ev->width;
456 wc.height = ev->height;
457 wc.border_width = ev->border_width;
458 wc.sibling = ev->above;
459 wc.stack_mode = ev->detail;
460 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
461 }
462 XSync(dpy, False);
463 }
464
465 void
466 destroynotify(XEvent *e) {
467 Client *c;
468 XDestroyWindowEvent *ev = &e->xdestroywindow;
469
470 if((c = getclient(ev->window)))
471 unmanage(c);
472 }
473
474 void
475 detach(Client *c) {
476 Client **tc;
477
478 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
479 *tc = c->next;
480 }
481
482 void
483 detachstack(Client *c) {
484 Client **tc;
485
486 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
487 *tc = c->snext;
488 }
489
490 void
491 die(const char *errstr, ...) {
492 va_list ap;
493
494 va_start(ap, errstr);
495 vfprintf(stderr, errstr, ap);
496 va_end(ap);
497 exit(EXIT_FAILURE);
498 }
499
500 void
501 drawbar(void) {
502 int i, x;
503
504 dc.x = 0;
505 for(i = 0; i < LENGTH(tags); i++) {
506 dc.w = TEXTW(tags[i]);
507 if(tagset[seltags] & 1 << i) {
508 drawtext(tags[i], dc.sel, isurgent(i));
509 drawsquare(sel && sel->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel);
510 }
511 else {
512 drawtext(tags[i], dc.norm, isurgent(i));
513 drawsquare(sel && sel->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm);
514 }
515 dc.x += dc.w;
516 }
517 if(blw > 0) {
518 dc.w = blw;
519 drawtext(lt[sellt]->symbol, dc.norm, False);
520 x = dc.x + dc.w;
521 }
522 else
523 x = dc.x;
524 dc.w = TEXTW(stext);
525 dc.x = ww - dc.w;
526 if(dc.x < x) {
527 dc.x = x;
528 dc.w = ww - x;
529 }
530 drawtext(stext, dc.norm, False);
531 if((dc.w = dc.x - x) > bh) {
532 dc.x = x;
533 if(sel) {
534 drawtext(sel->name, dc.sel, False);
535 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
536 }
537 else
538 drawtext(NULL, dc.norm, False);
539 }
540 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
541 XSync(dpy, False);
542 }
543
544 void
545 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
546 int x;
547 XGCValues gcv;
548 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
549
550 gcv.foreground = col[invert ? ColBG : ColFG];
551 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
552 x = (dc.font.ascent + dc.font.descent + 2) / 4;
553 r.x = dc.x + 1;
554 r.y = dc.y + 1;
555 if(filled) {
556 r.width = r.height = x + 1;
557 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
558 }
559 else if(empty) {
560 r.width = r.height = x;
561 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
562 }
563 }
564
565 void
566 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
567 int i, x, y, h, len, olen;
568 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
569 char buf[256];
570
571 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
572 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
573 if(!text)
574 return;
575 olen = strlen(text);
576 len = MIN(olen, sizeof buf);
577 memcpy(buf, text, len);
578 h = dc.font.ascent + dc.font.descent;
579 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
580 x = dc.x + (h / 2);
581 /* shorten text if necessary */
582 for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
583 if(!len)
584 return;
585 if(len < olen)
586 for(i = len; i && i > len - 3; buf[--i] = '.');
587 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
588 if(dc.font.set)
589 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
590 else
591 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
592 }
593
594 void
595 enternotify(XEvent *e) {
596 Client *c;
597 XCrossingEvent *ev = &e->xcrossing;
598
599 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
600 return;
601 if((c = getclient(ev->window)))
602 focus(c);
603 else
604 focus(NULL);
605 }
606
607 void
608 expose(XEvent *e) {
609 XExposeEvent *ev = &e->xexpose;
610
611 if(ev->count == 0 && (ev->window == barwin))
612 drawbar();
613 }
614
615 void
616 focus(Client *c) {
617 if(!c || !ISVISIBLE(c))
618 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
619 if(sel && sel != c) {
620 grabbuttons(sel, False);
621 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
622 }
623 if(c) {
624 detachstack(c);
625 attachstack(c);
626 grabbuttons(c, True);
627 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
628 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
629 }
630 else
631 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
632 sel = c;
633 drawbar();
634 }
635
636 void
637 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
638 XFocusChangeEvent *ev = &e->xfocus;
639
640 if(sel && ev->window != sel->win)
641 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
642 }
643
644 void
645 focusstack(const Arg *arg) {
646 Client *c = NULL, *i;
647
648 if(!sel)
649 return;
650 if (arg->i > 0) {
651 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
652 if(!c)
653 for(c = clients; c && !ISVISIBLE(c); c = c->next);
654 }
655 else {
656 for(i = clients; i != sel; i = i->next)
657 if(ISVISIBLE(i))
658 c = i;
659 if(!c)
660 for(; i; i = i->next)
661 if(ISVISIBLE(i))
662 c = i;
663 }
664 if(c) {
665 focus(c);
666 restack();
667 }
668 }
669
670 Client *
671 getclient(Window w) {
672 Client *c;
673
674 for(c = clients; c && c->win != w; c = c->next);
675 return c;
676 }
677
678 unsigned long
679 getcolor(const char *colstr) {
680 Colormap cmap = DefaultColormap(dpy, screen);
681 XColor color;
682
683 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
684 die("error, cannot allocate color '%s'\n", colstr);
685 return color.pixel;
686 }
687
688 long
689 getstate(Window w) {
690 int format, status;
691 long result = -1;
692 unsigned char *p = NULL;
693 unsigned long n, extra;
694 Atom real;
695
696 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
697 &real, &format, &n, &extra, (unsigned char **)&p);
698 if(status != Success)
699 return -1;
700 if(n != 0)
701 result = *p;
702 XFree(p);
703 return result;
704 }
705
706 Bool
707 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
708 char **list = NULL;
709 int n;
710 XTextProperty name;
711
712 if(!text || size == 0)
713 return False;
714 text[0] = '\0';
715 XGetTextProperty(dpy, w, &name, atom);
716 if(!name.nitems)
717 return False;
718 if(name.encoding == XA_STRING)
719 strncpy(text, (char *)name.value, size - 1);
720 else {
721 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
722 && n > 0 && *list) {
723 strncpy(text, *list, size - 1);
724 XFreeStringList(list);
725 }
726 }
727 text[size - 1] = '\0';
728 XFree(name.value);
729 return True;
730 }
731
732 void
733 grabbuttons(Client *c, Bool focused) {
734 unsigned int i, j;
735 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
736
737 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
738 if(focused) {
739 for(i = 0; i < LENGTH(buttons); i++)
740 if(buttons[i].click == ClkClientWin)
741 for(j = 0; j < LENGTH(modifiers); j++)
742 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
743 } else
744 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
745 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
746 }
747
748 void
749 grabkeys(void) {
750 unsigned int i, j;
751 KeyCode code;
752 XModifierKeymap *modmap;
753
754 /* init modifier map */
755 modmap = XGetModifierMapping(dpy);
756 for(i = 0; i < 8; i++)
757 for(j = 0; j < modmap->max_keypermod; j++) {
758 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
759 numlockmask = (1 << i);
760 }
761 XFreeModifiermap(modmap);
762
763 XUngrabKey(dpy, AnyKey, AnyModifier, root);
764 for(i = 0; i < LENGTH(keys); i++) {
765 code = XKeysymToKeycode(dpy, keys[i].keysym);
766 XGrabKey(dpy, code, keys[i].mod, root, True,
767 GrabModeAsync, GrabModeAsync);
768 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
769 GrabModeAsync, GrabModeAsync);
770 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
771 GrabModeAsync, GrabModeAsync);
772 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
773 GrabModeAsync, GrabModeAsync);
774 }
775 }
776
777 void
778 initfont(const char *fontstr) {
779 char *def, **missing;
780 int i, n;
781
782 missing = NULL;
783 if(dc.font.set)
784 XFreeFontSet(dpy, dc.font.set);
785 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
786 if(missing) {
787 while(n--)
788 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
789 XFreeStringList(missing);
790 }
791 if(dc.font.set) {
792 XFontSetExtents *font_extents;
793 XFontStruct **xfonts;
794 char **font_names;
795 dc.font.ascent = dc.font.descent = 0;
796 font_extents = XExtentsOfFontSet(dc.font.set);
797 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
798 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
799 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
800 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
801 xfonts++;
802 }
803 }
804 else {
805 if(dc.font.xfont)
806 XFreeFont(dpy, dc.font.xfont);
807 dc.font.xfont = NULL;
808 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
809 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
810 die("error, cannot load font: '%s'\n", fontstr);
811 dc.font.ascent = dc.font.xfont->ascent;
812 dc.font.descent = dc.font.xfont->descent;
813 }
814 dc.font.height = dc.font.ascent + dc.font.descent;
815 }
816
817 Bool
818 isoccupied(unsigned int t) {
819 Client *c;
820
821 for(c = clients; c; c = c->next)
822 if(c->tags & 1 << t)
823 return True;
824 return False;
825 }
826
827 Bool
828 isprotodel(Client *c) {
829 int i, n;
830 Atom *protocols;
831 Bool ret = False;
832
833 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
834 for(i = 0; !ret && i < n; i++)
835 if(protocols[i] == wmatom[WMDelete])
836 ret = True;
837 XFree(protocols);
838 }
839 return ret;
840 }
841
842 Bool
843 isurgent(unsigned int t) {
844 Client *c;
845
846 for(c = clients; c; c = c->next)
847 if(c->isurgent && c->tags & 1 << t)
848 return True;
849 return False;
850 }
851
852 void
853 keypress(XEvent *e) {
854 unsigned int i;
855 KeySym keysym;
856 XKeyEvent *ev;
857
858 ev = &e->xkey;
859 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
860 for(i = 0; i < LENGTH(keys); i++)
861 if(keysym == keys[i].keysym
862 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
863 && keys[i].func)
864 keys[i].func(&(keys[i].arg));
865 }
866
867 void
868 killclient(const Arg *arg) {
869 XEvent ev;
870
871 if(!sel)
872 return;
873 if(isprotodel(sel)) {
874 ev.type = ClientMessage;
875 ev.xclient.window = sel->win;
876 ev.xclient.message_type = wmatom[WMProtocols];
877 ev.xclient.format = 32;
878 ev.xclient.data.l[0] = wmatom[WMDelete];
879 ev.xclient.data.l[1] = CurrentTime;
880 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
881 }
882 else
883 XKillClient(dpy, sel->win);
884 }
885
886 void
887 manage(Window w, XWindowAttributes *wa) {
888 Client *c, *t = NULL;
889 Status rettrans;
890 Window trans;
891 XWindowChanges wc;
892
893 if(!(c = calloc(1, sizeof(Client))))
894 die("fatal: could not calloc() %u bytes\n", sizeof(Client));
895 c->win = w;
896
897 /* geometry */
898 c->x = wa->x;
899 c->y = wa->y;
900 c->w = wa->width;
901 c->h = wa->height;
902 c->oldbw = wa->border_width;
903 if(c->w == sw && c->h == sh) {
904 c->x = sx;
905 c->y = sy;
906 c->bw = wa->border_width;
907 }
908 else {
909 if(c->x + c->w + 2 * c->bw > sx + sw)
910 c->x = sx + sw - c->w - 2 * c->bw;
911 if(c->y + c->h + 2 * c->bw > sy + sh)
912 c->y = sy + sh - c->h - 2 * c->bw;
913 c->x = MAX(c->x, sx);
914 /* only fix client y-offset, if the client center might cover the bar */
915 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
916 c->bw = borderpx;
917 }
918
919 wc.border_width = c->bw;
920 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
921 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
922 configure(c); /* propagates border_width, if size doesn't change */
923 updatesizehints(c);
924 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
925 grabbuttons(c, False);
926 updatetitle(c);
927 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
928 for(t = clients; t && t->win != trans; t = t->next);
929 if(t)
930 c->tags = t->tags;
931 else
932 applyrules(c);
933 if(!c->isfloating)
934 c->isfloating = (rettrans == Success) || c->isfixed;
935 if(c->isfloating)
936 XRaiseWindow(dpy, c->win);
937 attach(c);
938 attachstack(c);
939 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
940 XMapWindow(dpy, c->win);
941 setclientstate(c, NormalState);
942 arrange();
943 }
944
945 void
946 mappingnotify(XEvent *e) {
947 XMappingEvent *ev = &e->xmapping;
948
949 XRefreshKeyboardMapping(ev);
950 if(ev->request == MappingKeyboard)
951 grabkeys();
952 }
953
954 void
955 maprequest(XEvent *e) {
956 static XWindowAttributes wa;
957 XMapRequestEvent *ev = &e->xmaprequest;
958
959 if(!XGetWindowAttributes(dpy, ev->window, &wa))
960 return;
961 if(wa.override_redirect)
962 return;
963 if(!getclient(ev->window))
964 manage(ev->window, &wa);
965 }
966
967 void
968 monocle(void) {
969 Client *c;
970
971 for(c = nexttiled(clients); c; c = nexttiled(c->next))
972 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
973 }
974
975 void
976 movemouse(const Arg *arg) {
977 int x1, y1, ocx, ocy, di, nx, ny;
978 unsigned int dui;
979 Client *c;
980 Window dummy;
981 XEvent ev;
982
983 if(!(c = sel))
984 return;
985 restack();
986 ocx = nx = c->x;
987 ocy = ny = c->y;
988 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
989 None, cursor[CurMove], CurrentTime) != GrabSuccess)
990 return;
991 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
992 for(;;) {
993 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
994 switch (ev.type) {
995 case ButtonRelease:
996 XUngrabPointer(dpy, CurrentTime);
997 return;
998 case ConfigureRequest:
999 case Expose:
1000 case MapRequest:
1001 handler[ev.type](&ev);
1002 break;
1003 case MotionNotify:
1004 XSync(dpy, False);
1005 nx = ocx + (ev.xmotion.x - x1);
1006 ny = ocy + (ev.xmotion.y - y1);
1007 if(snap && nx >= wx && nx <= wx + ww
1008 && ny >= wy && ny <= wy + wh) {
1009 if(abs(wx - nx) < snap)
1010 nx = wx;
1011 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
1012 nx = wx + ww - c->w - 2 * c->bw;
1013 if(abs(wy - ny) < snap)
1014 ny = wy;
1015 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
1016 ny = wy + wh - c->h - 2 * c->bw;
1017 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1018 togglefloating(NULL);
1019 }
1020 if(!lt[sellt]->arrange || c->isfloating)
1021 resize(c, nx, ny, c->w, c->h, False);
1022 break;
1023 }
1024 }
1025 }
1026
1027 Client *
1028 nexttiled(Client *c) {
1029 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1030 return c;
1031 }
1032
1033 void
1034 propertynotify(XEvent *e) {
1035 Client *c;
1036 Window trans;
1037 XPropertyEvent *ev = &e->xproperty;
1038
1039 if(ev->state == PropertyDelete)
1040 return; /* ignore */
1041 if((c = getclient(ev->window))) {
1042 switch (ev->atom) {
1043 default: break;
1044 case XA_WM_TRANSIENT_FOR:
1045 XGetTransientForHint(dpy, c->win, &trans);
1046 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1047 arrange();
1048 break;
1049 case XA_WM_NORMAL_HINTS:
1050 updatesizehints(c);
1051 break;
1052 case XA_WM_HINTS:
1053 updatewmhints(c);
1054 drawbar();
1055 break;
1056 }
1057 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1058 updatetitle(c);
1059 if(c == sel)
1060 drawbar();
1061 }
1062 }
1063 }
1064
1065 void
1066 quit(const Arg *arg) {
1067 readin = running = False;
1068 }
1069
1070 void
1071 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1072 XWindowChanges wc;
1073
1074 if(sizehints) {
1075 /* set minimum possible */
1076 w = MAX(1, w);
1077 h = MAX(1, h);
1078
1079 /* temporarily remove base dimensions */
1080 w -= c->basew;
1081 h -= c->baseh;
1082
1083 /* adjust for aspect limits */
1084 if(c->mina > 0 && c->maxa > 0) {
1085 if(c->maxa < (float) w/h)
1086 w = h * c->maxa;
1087 else if(c->mina > (float) h/w)
1088 h = w * c->mina;
1089 }
1090
1091 /* adjust for increment value */
1092 if(c->incw)
1093 w -= w % c->incw;
1094 if(c->inch)
1095 h -= h % c->inch;
1096
1097 /* restore base dimensions */
1098 w += c->basew;
1099 h += c->baseh;
1100
1101 w = MAX(w, c->minw);
1102 h = MAX(h, c->minh);
1103
1104 if(c->maxw)
1105 w = MIN(w, c->maxw);
1106
1107 if(c->maxh)
1108 h = MIN(h, c->maxh);
1109 }
1110 if(w <= 0 || h <= 0)
1111 return;
1112 if(x > sx + sw)
1113 x = sw - w - 2 * c->bw;
1114 if(y > sy + sh)
1115 y = sh - h - 2 * c->bw;
1116 if(x + w + 2 * c->bw < sx)
1117 x = sx;
1118 if(y + h + 2 * c->bw < sy)
1119 y = sy;
1120 if(h < bh)
1121 h = bh;
1122 if(w < bh)
1123 w = bh;
1124 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1125 c->x = wc.x = x;
1126 c->y = wc.y = y;
1127 c->w = wc.width = w;
1128 c->h = wc.height = h;
1129 wc.border_width = c->bw;
1130 XConfigureWindow(dpy, c->win,
1131 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1132 configure(c);
1133 XSync(dpy, False);
1134 }
1135 }
1136
1137 void
1138 resizemouse(const Arg *arg) {
1139 int ocx, ocy;
1140 int nw, nh;
1141 Client *c;
1142 XEvent ev;
1143
1144 if(!(c = sel))
1145 return;
1146 restack();
1147 ocx = c->x;
1148 ocy = c->y;
1149 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1150 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1151 return;
1152 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1153 for(;;) {
1154 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1155 switch(ev.type) {
1156 case ButtonRelease:
1157 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1158 c->w + c->bw - 1, c->h + c->bw - 1);
1159 XUngrabPointer(dpy, CurrentTime);
1160 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1161 return;
1162 case ConfigureRequest:
1163 case Expose:
1164 case MapRequest:
1165 handler[ev.type](&ev);
1166 break;
1167 case MotionNotify:
1168 XSync(dpy, False);
1169 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1170 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1171
1172 if(snap && nw >= wx && nw <= wx + ww
1173 && nh >= wy && nh <= wy + wh) {
1174 if(!c->isfloating && lt[sellt]->arrange
1175 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1176 togglefloating(NULL);
1177 }
1178 if(!lt[sellt]->arrange || c->isfloating)
1179 resize(c, c->x, c->y, nw, nh, True);
1180 break;
1181 }
1182 }
1183 }
1184
1185 void
1186 restack(void) {
1187 Client *c;
1188 XEvent ev;
1189 XWindowChanges wc;
1190
1191 drawbar();
1192 if(!sel)
1193 return;
1194 if(sel->isfloating || !lt[sellt]->arrange)
1195 XRaiseWindow(dpy, sel->win);
1196 if(lt[sellt]->arrange) {
1197 wc.stack_mode = Below;
1198 wc.sibling = barwin;
1199 for(c = stack; c; c = c->snext)
1200 if(!c->isfloating && ISVISIBLE(c)) {
1201 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1202 wc.sibling = c->win;
1203 }
1204 }
1205 XSync(dpy, False);
1206 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1207 }
1208
1209 void
1210 run(void) {
1211 char *p;
1212 char sbuf[sizeof stext];
1213 fd_set rd;
1214 int r, xfd;
1215 unsigned int len, offset;
1216 XEvent ev;
1217
1218 /* main event loop, also reads status text from stdin */
1219 XSync(dpy, False);
1220 xfd = ConnectionNumber(dpy);
1221 readin = True;
1222 offset = 0;
1223 len = sizeof stext - 1;
1224 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1225 while(running) {
1226 FD_ZERO(&rd);
1227 if(readin)
1228 FD_SET(STDIN_FILENO, &rd);
1229 FD_SET(xfd, &rd);
1230 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1231 if(errno == EINTR)
1232 continue;
1233 die("select failed\n");
1234 }
1235 if(FD_ISSET(STDIN_FILENO, &rd)) {
1236 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1237 case -1:
1238 strncpy(stext, strerror(errno), len);
1239 readin = False;
1240 break;
1241 case 0:
1242 strncpy(stext, "EOF", 4);
1243 readin = False;
1244 break;
1245 default:
1246 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1247 if(*p == '\n' || *p == '\0') {
1248 *p = '\0';
1249 strncpy(stext, sbuf, len);
1250 p += r - 1; /* p is sbuf + offset + r - 1 */
1251 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1252 offset = r;
1253 if(r)
1254 memmove(sbuf, p - r + 1, r);
1255 break;
1256 }
1257 break;
1258 }
1259 drawbar();
1260 }
1261 while(XPending(dpy)) {
1262 XNextEvent(dpy, &ev);
1263 if(handler[ev.type])
1264 (handler[ev.type])(&ev); /* call handler */
1265 }
1266 }
1267 }
1268
1269 void
1270 scan(void) {
1271 unsigned int i, num;
1272 Window *wins, d1, d2;
1273 XWindowAttributes wa;
1274
1275 wins = NULL;
1276 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1277 for(i = 0; i < num; i++) {
1278 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1279 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1280 continue;
1281 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1282 manage(wins[i], &wa);
1283 }
1284 for(i = 0; i < num; i++) { /* now the transients */
1285 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1286 continue;
1287 if(XGetTransientForHint(dpy, wins[i], &d1)
1288 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1289 manage(wins[i], &wa);
1290 }
1291 }
1292 if(wins)
1293 XFree(wins);
1294 }
1295
1296 void
1297 setclientstate(Client *c, long state) {
1298 long data[] = {state, None};
1299
1300 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1301 PropModeReplace, (unsigned char *)data, 2);
1302 }
1303
1304 void
1305 setlayout(const Arg *arg) {
1306 if(!arg || !arg->v || arg->v != lt[sellt])
1307 sellt ^= 1;
1308 if(arg && arg->v)
1309 lt[sellt] = (Layout *)arg->v;
1310 if(sel)
1311 arrange();
1312 else
1313 drawbar();
1314 }
1315
1316 /* arg > 1.0 will set mfact absolutly */
1317 void
1318 setmfact(const Arg *arg) {
1319 float f;
1320
1321 if(!arg || !lt[sellt]->arrange)
1322 return;
1323 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1324 if(f < 0.1 || f > 0.9)
1325 return;
1326 mfact = f;
1327 arrange();
1328 }
1329
1330 void
1331 setup(void) {
1332 unsigned int i;
1333 int w;
1334 XSetWindowAttributes wa;
1335
1336 /* init screen */
1337 screen = DefaultScreen(dpy);
1338 root = RootWindow(dpy, screen);
1339 initfont(font);
1340 sx = 0;
1341 sy = 0;
1342 sw = DisplayWidth(dpy, screen);
1343 sh = DisplayHeight(dpy, screen);
1344 bh = dc.h = dc.font.height + 2;
1345 lt[0] = &layouts[0];
1346 lt[1] = &layouts[1 % LENGTH(layouts)];
1347 updategeom();
1348
1349 /* init atoms */
1350 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1351 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1352 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1353 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1354 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1355 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1356
1357 /* init cursors */
1358 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1359 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1360 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1361
1362 /* init appearance */
1363 dc.norm[ColBorder] = getcolor(normbordercolor);
1364 dc.norm[ColBG] = getcolor(normbgcolor);
1365 dc.norm[ColFG] = getcolor(normfgcolor);
1366 dc.sel[ColBorder] = getcolor(selbordercolor);
1367 dc.sel[ColBG] = getcolor(selbgcolor);
1368 dc.sel[ColFG] = getcolor(selfgcolor);
1369 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1370 dc.gc = XCreateGC(dpy, root, 0, 0);
1371 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1372 if(!dc.font.set)
1373 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1374
1375 /* init bar */
1376 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1377 w = TEXTW(layouts[i].symbol);
1378 blw = MAX(blw, w);
1379 }
1380
1381 wa.override_redirect = 1;
1382 wa.background_pixmap = ParentRelative;
1383 wa.event_mask = ButtonPressMask|ExposureMask;
1384
1385 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1386 CopyFromParent, DefaultVisual(dpy, screen),
1387 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1388 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1389 XMapRaised(dpy, barwin);
1390 strcpy(stext, "dwm-"VERSION);
1391 drawbar();
1392
1393 /* EWMH support per view */
1394 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1395 PropModeReplace, (unsigned char *) netatom, NetLast);
1396
1397 /* select for events */
1398 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1399 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1400 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1401 XSelectInput(dpy, root, wa.event_mask);
1402
1403
1404 /* grab keys */
1405 grabkeys();
1406 }
1407
1408 void
1409 spawn(const Arg *arg) {
1410 /* The double-fork construct avoids zombie processes and keeps the code
1411 * clean from stupid signal handlers. */
1412 if(fork() == 0) {
1413 if(fork() == 0) {
1414 if(dpy)
1415 close(ConnectionNumber(dpy));
1416 setsid();
1417 execvp(((char **)arg->v)[0], (char **)arg->v);
1418 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1419 perror(" failed");
1420 }
1421 exit(0);
1422 }
1423 wait(0);
1424 }
1425
1426 void
1427 tag(const Arg *arg) {
1428 if(sel && arg->ui & TAGMASK) {
1429 sel->tags = arg->ui & TAGMASK;
1430 arrange();
1431 }
1432 }
1433
1434 int
1435 textnw(const char *text, unsigned int len) {
1436 XRectangle r;
1437
1438 if(dc.font.set) {
1439 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1440 return r.width;
1441 }
1442 return XTextWidth(dc.font.xfont, text, len);
1443 }
1444
1445 void
1446 tile(void) {
1447 int x, y, h, w, mw;
1448 unsigned int i, n;
1449 Client *c;
1450
1451 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1452 if(n == 0)
1453 return;
1454
1455 /* master */
1456 c = nexttiled(clients);
1457 mw = mfact * ww;
1458 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1459
1460 if(--n == 0)
1461 return;
1462
1463 /* tile stack */
1464 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1465 y = wy;
1466 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1467 h = wh / n;
1468 if(h < bh)
1469 h = wh;
1470
1471 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1472 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1473 ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1474 if(h != wh)
1475 y = c->y + c->h + 2 * c->bw;
1476 }
1477 }
1478
1479 void
1480 togglebar(const Arg *arg) {
1481 showbar = !showbar;
1482 updategeom();
1483 updatebar();
1484 arrange();
1485 }
1486
1487 void
1488 togglefloating(const Arg *arg) {
1489 if(!sel)
1490 return;
1491 sel->isfloating = !sel->isfloating || sel->isfixed;
1492 if(sel->isfloating)
1493 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1494 arrange();
1495 }
1496
1497 void
1498 toggletag(const Arg *arg) {
1499 unsigned int mask = sel->tags ^ (arg->ui & TAGMASK);
1500
1501 if(sel && mask) {
1502 sel->tags = mask;
1503 arrange();
1504 }
1505 }
1506
1507 void
1508 toggleview(const Arg *arg) {
1509 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1510
1511 if(mask) {
1512 tagset[seltags] = mask;
1513 clearurgent();
1514 arrange();
1515 }
1516 }
1517
1518 void
1519 unmanage(Client *c) {
1520 XWindowChanges wc;
1521
1522 wc.border_width = c->oldbw;
1523 /* The server grab construct avoids race conditions. */
1524 XGrabServer(dpy);
1525 XSetErrorHandler(xerrordummy);
1526 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1527 detach(c);
1528 detachstack(c);
1529 if(sel == c)
1530 focus(NULL);
1531 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1532 setclientstate(c, WithdrawnState);
1533 free(c);
1534 XSync(dpy, False);
1535 XSetErrorHandler(xerror);
1536 XUngrabServer(dpy);
1537 arrange();
1538 }
1539
1540 void
1541 unmapnotify(XEvent *e) {
1542 Client *c;
1543 XUnmapEvent *ev = &e->xunmap;
1544
1545 if((c = getclient(ev->window)))
1546 unmanage(c);
1547 }
1548
1549 void
1550 updatebar(void) {
1551 if(dc.drawable != 0)
1552 XFreePixmap(dpy, dc.drawable);
1553 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1554 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1555 }
1556
1557 void
1558 updategeom(void) {
1559 #ifdef XINERAMA
1560 int i;
1561 XineramaScreenInfo *info = NULL;
1562
1563 /* window area geometry */
1564 if(XineramaIsActive(dpy)) {
1565 info = XineramaQueryScreens(dpy, &i);
1566 wx = info[xidx].x_org;
1567 wy = showbar && topbar ? info[xidx].y_org + bh : info[xidx].y_org;
1568 ww = info[xidx].width;
1569 wh = showbar ? info[xidx].height - bh : info[xidx].height;
1570 XFree(info);
1571 }
1572 else
1573 #endif
1574 {
1575 wx = sx;
1576 wy = showbar && topbar ? sy + bh : sy;
1577 ww = sw;
1578 wh = showbar ? sh - bh : sh;
1579 }
1580
1581 /* bar position */
1582 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1583 }
1584
1585 void
1586 updatesizehints(Client *c) {
1587 long msize;
1588 XSizeHints size;
1589
1590 XGetWMNormalHints(dpy, c->win, &size, &msize);
1591 if(size.flags & PBaseSize) {
1592 c->basew = size.base_width;
1593 c->baseh = size.base_height;
1594 }
1595 else if(size.flags & PMinSize) {
1596 c->basew = size.min_width;
1597 c->baseh = size.min_height;
1598 }
1599 else
1600 c->basew = c->baseh = 0;
1601 if(size.flags & PResizeInc) {
1602 c->incw = size.width_inc;
1603 c->inch = size.height_inc;
1604 }
1605 else
1606 c->incw = c->inch = 0;
1607 if(size.flags & PMaxSize) {
1608 c->maxw = size.max_width;
1609 c->maxh = size.max_height;
1610 }
1611 else
1612 c->maxw = c->maxh = 0;
1613 if(size.flags & PMinSize) {
1614 c->minw = size.min_width;
1615 c->minh = size.min_height;
1616 }
1617 else if(size.flags & PBaseSize) {
1618 c->minw = size.base_width;
1619 c->minh = size.base_height;
1620 }
1621 else
1622 c->minw = c->minh = 0;
1623 if(size.flags & PAspect) {
1624 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1625 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1626 }
1627 else
1628 c->maxa = c->mina = 0.0;
1629 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1630 && c->maxw == c->minw && c->maxh == c->minh);
1631 }
1632
1633 void
1634 updatetitle(Client *c) {
1635 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1636 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1637 }
1638
1639 void
1640 updatewmhints(Client *c) {
1641 XWMHints *wmh;
1642
1643 if((wmh = XGetWMHints(dpy, c->win))) {
1644 if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
1645 wmh->flags &= ~XUrgencyHint;
1646 XSetWMHints(dpy, c->win, wmh);
1647 }
1648 else
1649 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1650
1651 XFree(wmh);
1652 }
1653 }
1654
1655 void
1656 view(const Arg *arg) {
1657 if(arg && (arg->i & TAGMASK) == tagset[seltags])
1658 return;
1659 seltags ^= 1; /* toggle sel tagset */
1660 if(arg && (arg->ui & TAGMASK))
1661 tagset[seltags] = arg->i & TAGMASK;
1662 clearurgent();
1663 arrange();
1664 }
1665
1666 /* There's no way to check accesses to destroyed windows, thus those cases are
1667 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1668 * default error handler, which may call exit. */
1669 int
1670 xerror(Display *dpy, XErrorEvent *ee) {
1671 if(ee->error_code == BadWindow
1672 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1673 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1674 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1675 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1676 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1677 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1678 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1679 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1680 return 0;
1681 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1682 ee->request_code, ee->error_code);
1683 return xerrorxlib(dpy, ee); /* may call exit */
1684 }
1685
1686 int
1687 xerrordummy(Display *dpy, XErrorEvent *ee) {
1688 return 0;
1689 }
1690
1691 /* Startup Error handler to check if another window manager
1692 * is already running. */
1693 int
1694 xerrorstart(Display *dpy, XErrorEvent *ee) {
1695 otherwm = True;
1696 return -1;
1697 }
1698
1699 void
1700 zoom(const Arg *arg) {
1701 Client *c = sel;
1702
1703 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1704 return;
1705 if(c == nexttiled(clients))
1706 if(!c || !(c = nexttiled(c->next)))
1707 return;
1708 detach(c);
1709 attach(c);
1710 focus(c);
1711 arrange();
1712 }
1713
1714 int
1715 main(int argc, char *argv[]) {
1716 if(argc == 2 && !strcmp("-v", argv[1]))
1717 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1718 else if(argc != 1)
1719 die("usage: dwm [-v]\n");
1720
1721 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1722 fprintf(stderr, "warning: no locale support\n");
1723
1724 if(!(dpy = XOpenDisplay(0)))
1725 die("dwm: cannot open display\n");
1726
1727 checkotherwm();
1728 setup();
1729 scan();
1730 run();
1731 cleanup();
1732
1733 XCloseDisplay(dpy);
1734 return 0;
1735 }