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