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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 * The event handlers of dwm are organized in an array which is accessed
10 * whenever a new event has been fetched. This allows event dispatching
11 * in O(1) time.
12 *
13 * Each child of the root window is called a client, except windows which have
14 * set the override_redirect flag. Clients are organized in a global
15 * linked client list, the focus history is remembered through a global
16 * stack list. Each client contains a bit array to indicate the tags of a
17 * client.
18 *
19 * Keys and tagging rules are organized as arrays and defined in config.h.
20 *
21 * To understand everything else, start reading main().
22 */
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdarg.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <X11/cursorfont.h>
34 #include <X11/keysym.h>
35 #include <X11/Xatom.h>
36 #include <X11/Xlib.h>
37 #include <X11/Xproto.h>
38 #include <X11/Xutil.h>
39 #ifdef XINERAMA
40 #include <X11/extensions/Xinerama.h>
41 #endif
42
43 /* macros */
44 #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
45 #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
46 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
47 #define ISVISIBLE(x) (x->tags & tagset[seltags])
48 #define LENGTH(x) (sizeof x / sizeof x[0])
49 #define MAX(a, b) ((a) > (b) ? (a) : (b))
50 #define MIN(a, b) ((a) < (b) ? (a) : (b))
51 #define MAXTAGLEN 16
52 #define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53 #define WIDTH(x) ((x)->w + 2 * (x)->bw)
54 #define HEIGHT(x) ((x)->h + 2 * (x)->bw)
55 #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
56 #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
57
58 /* enums */
59 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62 enum { WMProtocols, WMDelete, 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 adjustborder(Client *c, Bool issingle);
132 static void applyrules(Client *c);
133 static void arrange(void);
134 static void attach(Client *c);
135 static void attachstack(Client *c);
136 static void buttonpress(XEvent *e);
137 static void checkotherwm(void);
138 static void cleanup(void);
139 static void clearurgent(Client *c);
140 static void configure(Client *c);
141 static void configurenotify(XEvent *e);
142 static void configurerequest(XEvent *e);
143 static void destroynotify(XEvent *e);
144 static void detach(Client *c);
145 static void detachstack(Client *c);
146 static void die(const char *errstr, ...);
147 static void drawbar(void);
148 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
150 static void enternotify(XEvent *e);
151 static void expose(XEvent *e);
152 static void focus(Client *c);
153 static void focusin(XEvent *e);
154 static void focusstack(const Arg *arg);
155 static Client *getclient(Window w);
156 static unsigned long getcolor(const char *colstr);
157 static long getstate(Window w);
158 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
159 static void grabbuttons(Client *c, Bool focused);
160 static void grabkeys(void);
161 static void initfont(const char *fontstr);
162 static Bool isprotodel(Client *c);
163 static void keypress(XEvent *e);
164 static void killclient(const Arg *arg);
165 static void manage(Window w, XWindowAttributes *wa);
166 static void mappingnotify(XEvent *e);
167 static void maprequest(XEvent *e);
168 static void monocle(void);
169 static void movemouse(const Arg *arg);
170 static Client *nexttiled(Client *c);
171 static void propertynotify(XEvent *e);
172 static void quit(const Arg *arg);
173 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174 static void resizemouse(const Arg *arg);
175 static void restack(void);
176 static void run(void);
177 static void scan(void);
178 static void setclientstate(Client *c, long state);
179 static void setlayout(const Arg *arg);
180 static void setmfact(const Arg *arg);
181 static void setup(void);
182 static void showhide(Client *c);
183 static void sigchld(int signal);
184 static void spawn(const Arg *arg);
185 static void tag(const Arg *arg);
186 static int textnw(const char *text, unsigned int len);
187 static void tile(void);
188 static void togglebar(const Arg *arg);
189 static void togglefloating(const Arg *arg);
190 static void toggletag(const Arg *arg);
191 static void toggleview(const Arg *arg);
192 static void unmanage(Client *c);
193 static void unmapnotify(XEvent *e);
194 static void updatebar(void);
195 static void updategeom(void);
196 static void updatenumlockmask(void);
197 static void updatesizehints(Client *c);
198 static void updatestatus(void);
199 static void updatetitle(Client *c);
200 static void updatewmhints(Client *c);
201 static void view(const Arg *arg);
202 static int xerror(Display *dpy, XErrorEvent *ee);
203 static int xerrordummy(Display *dpy, XErrorEvent *ee);
204 static int xerrorstart(Display *dpy, XErrorEvent *ee);
205 static void zoom(const Arg *arg);
206
207 /* variables */
208 static char stext[256];
209 static int screen;
210 static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
211 static int by, bh, blw; /* bar geometry y, height and layout symbol width */
212 static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
213 static unsigned int seltags = 0, sellt = 0;
214 static int (*xerrorxlib)(Display *, XErrorEvent *);
215 static unsigned int 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;
232 static Bool running = True;
233 static Client *clients = NULL;
234 static Client *sel = NULL;
235 static Client *stack = NULL;
236 static Cursor cursor[CurLast];
237 static Display *dpy;
238 static DC dc;
239 static Layout *lt[] = { NULL, NULL };
240 static Window root, barwin;
241 /* configuration, allows nested code to access above variables */
242 #include "config.h"
243
244 /* compile-time check if all tags fit into an unsigned int bit array. */
245 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
246
247 /* function implementations */
248 void
249 adjustborder(Client *c, Bool issingle) {
250 XWindowChanges wc;
251
252 wc.border_width = issingle ? 0 : borderpx;
253 if(c->bw != wc.border_width) {
254 c->bw = wc.border_width;
255 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
256 }
257 }
258
259 void
260 applyrules(Client *c) {
261 unsigned int i;
262 Rule *r;
263 XClassHint ch = { 0 };
264
265 /* rule matching */
266 if(XGetClassHint(dpy, c->win, &ch)) {
267 for(i = 0; i < LENGTH(rules); i++) {
268 r = &rules[i];
269 if((!r->title || strstr(c->name, r->title))
270 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
271 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
272 c->isfloating = r->isfloating;
273 c->tags |= r->tags & TAGMASK ? r->tags & TAGMASK : tagset[seltags];
274 }
275 }
276 if(ch.res_class)
277 XFree(ch.res_class);
278 if(ch.res_name)
279 XFree(ch.res_name);
280 }
281 if(!c->tags)
282 c->tags = tagset[seltags];
283 }
284
285 void
286 arrange(void) {
287 showhide(stack);
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 unsigned int 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 && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
337 }
338
339 void
340 checkotherwm(void) {
341 otherwm = False;
342 xerrorxlib = 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 die("dwm: another window manager is already running\n");
349 XSetErrorHandler(xerror);
350 XSync(dpy, False);
351 }
352
353 void
354 cleanup(void) {
355 Arg a = {.ui = ~0};
356 Layout foo = { "", NULL };
357
358 view(&a);
359 lt[sellt] = &foo;
360 while(stack)
361 unmanage(stack);
362 if(dc.font.set)
363 XFreeFontSet(dpy, dc.font.set);
364 else
365 XFreeFont(dpy, dc.font.xfont);
366 XUngrabKey(dpy, AnyKey, AnyModifier, root);
367 XFreePixmap(dpy, dc.drawable);
368 XFreeGC(dpy, dc.gc);
369 XFreeCursor(dpy, cursor[CurNormal]);
370 XFreeCursor(dpy, cursor[CurResize]);
371 XFreeCursor(dpy, cursor[CurMove]);
372 XDestroyWindow(dpy, barwin);
373 XSync(dpy, False);
374 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
375 }
376
377 void
378 clearurgent(Client *c) {
379 XWMHints *wmh;
380
381 c->isurgent = False;
382 if(!(wmh = XGetWMHints(dpy, c->win)))
383 return;
384 wmh->flags &= ~XUrgencyHint;
385 XSetWMHints(dpy, c->win, wmh);
386 XFree(wmh);
387 }
388
389 void
390 configure(Client *c) {
391 XConfigureEvent ce;
392
393 ce.type = ConfigureNotify;
394 ce.display = dpy;
395 ce.event = c->win;
396 ce.window = c->win;
397 ce.x = c->x;
398 ce.y = c->y;
399 ce.width = c->w;
400 ce.height = c->h;
401 ce.border_width = c->bw;
402 ce.above = None;
403 ce.override_redirect = False;
404 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
405 }
406
407 void
408 configurenotify(XEvent *e) {
409 XConfigureEvent *ev = &e->xconfigure;
410
411 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
412 sw = ev->width;
413 sh = ev->height;
414 updategeom();
415 updatebar();
416 arrange();
417 }
418 }
419
420 void
421 configurerequest(XEvent *e) {
422 Client *c;
423 XConfigureRequestEvent *ev = &e->xconfigurerequest;
424 XWindowChanges wc;
425
426 if((c = getclient(ev->window))) {
427 if(ev->value_mask & CWBorderWidth)
428 c->bw = ev->border_width;
429 else if(c->isfloating || !lt[sellt]->arrange) {
430 if(ev->value_mask & CWX)
431 c->x = sx + ev->x;
432 if(ev->value_mask & CWY)
433 c->y = sy + ev->y;
434 if(ev->value_mask & CWWidth)
435 c->w = ev->width;
436 if(ev->value_mask & CWHeight)
437 c->h = ev->height;
438 if((c->x - sx + c->w) > sw && c->isfloating)
439 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
440 if((c->y - sy + c->h) > sh && c->isfloating)
441 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
442 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
443 configure(c);
444 if(ISVISIBLE(c))
445 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
446 }
447 else
448 configure(c);
449 }
450 else {
451 wc.x = ev->x;
452 wc.y = ev->y;
453 wc.width = ev->width;
454 wc.height = ev->height;
455 wc.border_width = ev->border_width;
456 wc.sibling = ev->above;
457 wc.stack_mode = ev->detail;
458 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
459 }
460 XSync(dpy, False);
461 }
462
463 void
464 destroynotify(XEvent *e) {
465 Client *c;
466 XDestroyWindowEvent *ev = &e->xdestroywindow;
467
468 if((c = getclient(ev->window)))
469 unmanage(c);
470 }
471
472 void
473 detach(Client *c) {
474 Client **tc;
475
476 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
477 *tc = c->next;
478 }
479
480 void
481 detachstack(Client *c) {
482 Client **tc;
483
484 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
485 *tc = c->snext;
486 }
487
488 void
489 die(const char *errstr, ...) {
490 va_list ap;
491
492 va_start(ap, errstr);
493 vfprintf(stderr, errstr, ap);
494 va_end(ap);
495 exit(EXIT_FAILURE);
496 }
497
498 void
499 drawbar(void) {
500 int x;
501 unsigned int i, occ = 0, urg = 0;
502 unsigned long *col;
503 Client *c;
504
505 for(c = clients; c; c = c->next) {
506 occ |= c->tags;
507 if(c->isurgent)
508 urg |= c->tags;
509 }
510
511 dc.x = 0;
512 for(i = 0; i < LENGTH(tags); i++) {
513 dc.w = TEXTW(tags[i]);
514 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
515 drawtext(tags[i], col, urg & 1 << i);
516 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
517 dc.x += dc.w;
518 }
519 if(blw > 0) {
520 dc.w = blw;
521 drawtext(lt[sellt]->symbol, dc.norm, False);
522 x = dc.x + dc.w;
523 }
524 else
525 x = dc.x;
526 dc.w = TEXTW(stext);
527 dc.x = ww - dc.w;
528 if(dc.x < x) {
529 dc.x = x;
530 dc.w = ww - x;
531 }
532 drawtext(stext, dc.norm, False);
533 if((dc.w = dc.x - x) > bh) {
534 dc.x = x;
535 if(sel) {
536 drawtext(sel->name, dc.sel, False);
537 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
538 }
539 else
540 drawtext(NULL, dc.norm, False);
541 }
542 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
543 XSync(dpy, False);
544 }
545
546 void
547 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
548 int x;
549 XGCValues gcv;
550 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
551
552 gcv.foreground = col[invert ? ColBG : ColFG];
553 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
554 x = (dc.font.ascent + dc.font.descent + 2) / 4;
555 r.x = dc.x + 1;
556 r.y = dc.y + 1;
557 if(filled) {
558 r.width = r.height = x + 1;
559 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
560 }
561 else if(empty) {
562 r.width = r.height = x;
563 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
564 }
565 }
566
567 void
568 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
569 char buf[256];
570 int i, x, y, h, len, olen;
571 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
572
573 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
574 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
575 if(!text)
576 return;
577 olen = strlen(text);
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 = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
583 if(!len)
584 return;
585 memcpy(buf, text, len);
586 if(len < olen)
587 for(i = len; i && i > len - 3; buf[--i] = '.');
588 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
589 if(dc.font.set)
590 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
591 else
592 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
593 }
594
595 void
596 enternotify(XEvent *e) {
597 Client *c;
598 XCrossingEvent *ev = &e->xcrossing;
599
600 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
601 return;
602 if((c = getclient(ev->window)))
603 focus(c);
604 else
605 focus(NULL);
606 }
607
608 void
609 expose(XEvent *e) {
610 XExposeEvent *ev = &e->xexpose;
611
612 if(ev->count == 0 && (ev->window == barwin))
613 drawbar();
614 }
615
616 void
617 focus(Client *c) {
618 if(!c || !ISVISIBLE(c))
619 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
620 if(sel && sel != c) {
621 grabbuttons(sel, False);
622 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
623 }
624 if(c) {
625 if(c->isurgent)
626 clearurgent(c);
627 detachstack(c);
628 attachstack(c);
629 grabbuttons(c, True);
630 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
631 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
632 }
633 else
634 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
635 sel = c;
636 drawbar();
637 }
638
639 void
640 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
641 XFocusChangeEvent *ev = &e->xfocus;
642
643 if(sel && ev->window != sel->win)
644 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
645 }
646
647 void
648 focusstack(const Arg *arg) {
649 Client *c = NULL, *i;
650
651 if(!sel)
652 return;
653 if (arg->i > 0) {
654 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
655 if(!c)
656 for(c = clients; c && !ISVISIBLE(c); c = c->next);
657 }
658 else {
659 for(i = clients; i != sel; i = i->next)
660 if(ISVISIBLE(i))
661 c = i;
662 if(!c)
663 for(; i; i = i->next)
664 if(ISVISIBLE(i))
665 c = i;
666 }
667 if(c) {
668 focus(c);
669 restack();
670 }
671 }
672
673 Client *
674 getclient(Window w) {
675 Client *c;
676
677 for(c = clients; c && c->win != w; c = c->next);
678 return c;
679 }
680
681 unsigned long
682 getcolor(const char *colstr) {
683 Colormap cmap = DefaultColormap(dpy, screen);
684 XColor color;
685
686 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
687 die("error, cannot allocate color '%s'\n", colstr);
688 return color.pixel;
689 }
690
691 long
692 getstate(Window w) {
693 int format, status;
694 long result = -1;
695 unsigned char *p = NULL;
696 unsigned long n, extra;
697 Atom real;
698
699 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
700 &real, &format, &n, &extra, (unsigned char **)&p);
701 if(status != Success)
702 return -1;
703 if(n != 0)
704 result = *p;
705 XFree(p);
706 return result;
707 }
708
709 Bool
710 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
711 char **list = NULL;
712 int n;
713 XTextProperty name;
714
715 if(!text || size == 0)
716 return False;
717 text[0] = '\0';
718 XGetTextProperty(dpy, w, &name, atom);
719 if(!name.nitems)
720 return False;
721 if(name.encoding == XA_STRING)
722 strncpy(text, (char *)name.value, size - 1);
723 else {
724 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
725 && n > 0 && *list) {
726 strncpy(text, *list, size - 1);
727 XFreeStringList(list);
728 }
729 }
730 text[size - 1] = '\0';
731 XFree(name.value);
732 return True;
733 }
734
735 void
736 grabbuttons(Client *c, Bool focused) {
737 updatenumlockmask();
738 {
739 unsigned int i, j;
740 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
741 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
742 if(focused) {
743 for(i = 0; i < LENGTH(buttons); i++)
744 if(buttons[i].click == ClkClientWin)
745 for(j = 0; j < LENGTH(modifiers); j++)
746 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
747 } else
748 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
749 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
750 }
751 }
752
753 void
754 grabkeys(void) {
755 updatenumlockmask();
756 { /* grab keys */
757 unsigned int i, j;
758 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
759 KeyCode code;
760
761 XUngrabKey(dpy, AnyKey, AnyModifier, root);
762 for(i = 0; i < LENGTH(keys); i++) {
763 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
764 for(j = 0; j < LENGTH(modifiers); j++)
765 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
766 True, GrabModeAsync, GrabModeAsync);
767 }
768 }
769 }
770
771 void
772 initfont(const char *fontstr) {
773 char *def, **missing;
774 int i, n;
775
776 missing = NULL;
777 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
778 if(missing) {
779 while(n--)
780 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
781 XFreeStringList(missing);
782 }
783 if(dc.font.set) {
784 XFontSetExtents *font_extents;
785 XFontStruct **xfonts;
786 char **font_names;
787 dc.font.ascent = dc.font.descent = 0;
788 font_extents = XExtentsOfFontSet(dc.font.set);
789 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
790 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
791 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
792 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
793 xfonts++;
794 }
795 }
796 else {
797 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
798 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
799 die("error, cannot load font: '%s'\n", fontstr);
800 dc.font.ascent = dc.font.xfont->ascent;
801 dc.font.descent = dc.font.xfont->descent;
802 }
803 dc.font.height = dc.font.ascent + dc.font.descent;
804 }
805
806 Bool
807 isprotodel(Client *c) {
808 int i, n;
809 Atom *protocols;
810 Bool ret = False;
811
812 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
813 for(i = 0; !ret && i < n; i++)
814 if(protocols[i] == wmatom[WMDelete])
815 ret = True;
816 XFree(protocols);
817 }
818 return ret;
819 }
820
821 void
822 keypress(XEvent *e) {
823 unsigned int i;
824 KeySym keysym;
825 XKeyEvent *ev;
826
827 ev = &e->xkey;
828 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
829 for(i = 0; i < LENGTH(keys); i++)
830 if(keysym == keys[i].keysym
831 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
832 && keys[i].func)
833 keys[i].func(&(keys[i].arg));
834 }
835
836 void
837 killclient(const Arg *arg) {
838 XEvent ev;
839
840 if(!sel)
841 return;
842 if(isprotodel(sel)) {
843 ev.type = ClientMessage;
844 ev.xclient.window = sel->win;
845 ev.xclient.message_type = wmatom[WMProtocols];
846 ev.xclient.format = 32;
847 ev.xclient.data.l[0] = wmatom[WMDelete];
848 ev.xclient.data.l[1] = CurrentTime;
849 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
850 }
851 else
852 XKillClient(dpy, sel->win);
853 }
854
855 void
856 manage(Window w, XWindowAttributes *wa) {
857 static Client cz;
858 Client *c, *t = NULL;
859 Window trans = None;
860 XWindowChanges wc;
861
862 if(!(c = malloc(sizeof(Client))))
863 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
864 *c = cz;
865 c->win = w;
866
867 /* geometry */
868 c->x = wa->x;
869 c->y = wa->y;
870 c->w = wa->width;
871 c->h = wa->height;
872 c->oldbw = wa->border_width;
873 if(c->w == sw && c->h == sh) {
874 c->x = sx;
875 c->y = sy;
876 c->bw = 0;
877 }
878 else {
879 if(c->x + WIDTH(c) > sx + sw)
880 c->x = sx + sw - WIDTH(c);
881 if(c->y + HEIGHT(c) > sy + sh)
882 c->y = sy + sh - HEIGHT(c);
883 c->x = MAX(c->x, sx);
884 /* only fix client y-offset, if the client center might cover the bar */
885 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
886 c->bw = borderpx;
887 }
888
889 wc.border_width = c->bw;
890 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
891 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
892 configure(c); /* propagates border_width, if size doesn't change */
893 updatesizehints(c);
894 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
895 grabbuttons(c, False);
896 updatetitle(c);
897 if(XGetTransientForHint(dpy, w, &trans))
898 t = getclient(trans);
899 if(t)
900 c->tags = t->tags;
901 else
902 applyrules(c);
903 if(!c->isfloating)
904 c->isfloating = trans != None || c->isfixed;
905 if(c->isfloating)
906 XRaiseWindow(dpy, c->win);
907 attach(c);
908 attachstack(c);
909 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
910 XMapWindow(dpy, c->win);
911 setclientstate(c, NormalState);
912 arrange();
913 }
914
915 void
916 mappingnotify(XEvent *e) {
917 XMappingEvent *ev = &e->xmapping;
918
919 XRefreshKeyboardMapping(ev);
920 if(ev->request == MappingKeyboard)
921 grabkeys();
922 }
923
924 void
925 maprequest(XEvent *e) {
926 static XWindowAttributes wa;
927 XMapRequestEvent *ev = &e->xmaprequest;
928
929 if(!XGetWindowAttributes(dpy, ev->window, &wa))
930 return;
931 if(wa.override_redirect)
932 return;
933 if(!getclient(ev->window))
934 manage(ev->window, &wa);
935 }
936
937 void
938 monocle(void) {
939 unsigned int n;
940 Client *c;
941
942 for(n = 0, c = nexttiled(clients); c && n < 2; c = nexttiled(c->next), n++);
943 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
944 adjustborder(c, n == 1);
945 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
946 }
947 }
948
949 void
950 movemouse(const Arg *arg) {
951 int x, y, ocx, ocy, di, nx, ny;
952 unsigned int dui;
953 Client *c;
954 Window dummy;
955 XEvent ev;
956
957 if(!(c = sel))
958 return;
959 restack();
960 ocx = c->x;
961 ocy = c->y;
962 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
963 None, cursor[CurMove], CurrentTime) != GrabSuccess)
964 return;
965 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
966 if(usegrab)
967 XGrabServer(dpy);
968 do {
969 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
970 switch (ev.type) {
971 case ConfigureRequest:
972 case Expose:
973 case MapRequest:
974 handler[ev.type](&ev);
975 break;
976 case MotionNotify:
977 nx = ocx + (ev.xmotion.x - x);
978 ny = ocy + (ev.xmotion.y - y);
979 if(snap && nx >= wx && nx <= wx + ww
980 && ny >= wy && ny <= wy + wh) {
981 if(abs(wx - nx) < snap)
982 nx = wx;
983 else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
984 nx = wx + ww - WIDTH(c);
985 if(abs(wy - ny) < snap)
986 ny = wy;
987 else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
988 ny = wy + wh - HEIGHT(c);
989 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
990 togglefloating(NULL);
991 }
992 if(!lt[sellt]->arrange || c->isfloating)
993 resize(c, nx, ny, c->w, c->h, False);
994 break;
995 }
996 }
997 while(ev.type != ButtonRelease);
998 if(usegrab)
999 XUngrabServer(dpy);
1000 XUngrabPointer(dpy, CurrentTime);
1001 }
1002
1003 Client *
1004 nexttiled(Client *c) {
1005 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1006 return c;
1007 }
1008
1009 void
1010 propertynotify(XEvent *e) {
1011 Client *c;
1012 Window trans;
1013 XPropertyEvent *ev = &e->xproperty;
1014
1015 if((ev->window == root) && (ev->atom = XA_WM_NAME))
1016 updatestatus();
1017 else if(ev->state == PropertyDelete)
1018 return; /* ignore */
1019 else if((c = getclient(ev->window))) {
1020 switch (ev->atom) {
1021 default: break;
1022 case XA_WM_TRANSIENT_FOR:
1023 XGetTransientForHint(dpy, c->win, &trans);
1024 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1025 arrange();
1026 break;
1027 case XA_WM_NORMAL_HINTS:
1028 updatesizehints(c);
1029 break;
1030 case XA_WM_HINTS:
1031 updatewmhints(c);
1032 drawbar();
1033 break;
1034 }
1035 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1036 updatetitle(c);
1037 if(c == sel)
1038 drawbar();
1039 }
1040 }
1041 }
1042
1043 void
1044 quit(const Arg *arg) {
1045 running = False;
1046 }
1047
1048 void
1049 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1050 XWindowChanges wc;
1051
1052 if(sizehints) {
1053 /* see last two sentences in ICCCM 4.1.2.3 */
1054 Bool baseismin = c->basew == c->minw && c->baseh == c->minh;
1055
1056 /* set minimum possible */
1057 w = MAX(1, w);
1058 h = MAX(1, h);
1059
1060 if(!baseismin) { /* temporarily remove base dimensions */
1061 w -= c->basew;
1062 h -= c->baseh;
1063 }
1064
1065 /* adjust for aspect limits */
1066 if(c->mina > 0 && c->maxa > 0) {
1067 if(c->maxa < (float)w / h)
1068 w = h * c->maxa;
1069 else if(c->mina < (float)h / w)
1070 h = w * c->mina;
1071 }
1072
1073 if(baseismin) { /* increment calculation requires this */
1074 w -= c->basew;
1075 h -= c->baseh;
1076 }
1077
1078 /* adjust for increment value */
1079 if(c->incw)
1080 w -= w % c->incw;
1081 if(c->inch)
1082 h -= h % c->inch;
1083
1084 /* restore base dimensions */
1085 w += c->basew;
1086 h += c->baseh;
1087
1088 w = MAX(w, c->minw);
1089 h = MAX(h, c->minh);
1090
1091 if(c->maxw)
1092 w = MIN(w, c->maxw);
1093
1094 if(c->maxh)
1095 h = MIN(h, c->maxh);
1096 }
1097 if(w <= 0 || h <= 0)
1098 return;
1099 if(x > sx + sw)
1100 x = sw - WIDTH(c);
1101 if(y > sy + sh)
1102 y = sh - HEIGHT(c);
1103 if(x + w + 2 * c->bw < sx)
1104 x = sx;
1105 if(y + h + 2 * c->bw < sy)
1106 y = sy;
1107 if(h < bh)
1108 h = bh;
1109 if(w < bh)
1110 w = bh;
1111 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1112 c->x = wc.x = x;
1113 c->y = wc.y = y;
1114 c->w = wc.width = w;
1115 c->h = wc.height = h;
1116 wc.border_width = c->bw;
1117 XConfigureWindow(dpy, c->win,
1118 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1119 configure(c);
1120 XSync(dpy, False);
1121 }
1122 }
1123
1124 void
1125 resizemouse(const Arg *arg) {
1126 int ocx, ocy;
1127 int nw, nh;
1128 Client *c;
1129 XEvent ev;
1130
1131 if(!(c = sel))
1132 return;
1133 restack();
1134 ocx = c->x;
1135 ocy = c->y;
1136 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1137 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1138 return;
1139 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1140 if(usegrab)
1141 XGrabServer(dpy);
1142 do {
1143 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1144 switch(ev.type) {
1145 case ConfigureRequest:
1146 case Expose:
1147 case MapRequest:
1148 handler[ev.type](&ev);
1149 break;
1150 case MotionNotify:
1151 nw = MAX(ev.xmotion.x - ocx - 2*c->bw + 1, 1);
1152 nh = MAX(ev.xmotion.y - ocy - 2*c->bw + 1, 1);
1153
1154 if(snap && nw >= wx && nw <= wx + ww
1155 && nh >= wy && nh <= wy + wh) {
1156 if(!c->isfloating && lt[sellt]->arrange
1157 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1158 togglefloating(NULL);
1159 }
1160 if(!lt[sellt]->arrange || c->isfloating)
1161 resize(c, c->x, c->y, nw, nh, True);
1162 break;
1163 }
1164 }
1165 while(ev.type != ButtonRelease);
1166 if(usegrab)
1167 XUngrabServer(dpy);
1168 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1169 XUngrabPointer(dpy, CurrentTime);
1170 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1171 }
1172
1173 void
1174 restack(void) {
1175 Client *c;
1176 XEvent ev;
1177 XWindowChanges wc;
1178
1179 drawbar();
1180 if(!sel)
1181 return;
1182 if(sel->isfloating || !lt[sellt]->arrange)
1183 XRaiseWindow(dpy, sel->win);
1184 if(lt[sellt]->arrange) {
1185 wc.stack_mode = Below;
1186 wc.sibling = barwin;
1187 for(c = stack; c; c = c->snext)
1188 if(!c->isfloating && ISVISIBLE(c)) {
1189 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1190 wc.sibling = c->win;
1191 }
1192 }
1193 XSync(dpy, False);
1194 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1195 }
1196
1197 void
1198 run(void) {
1199 XEvent ev;
1200
1201 /* main event loop */
1202 XSync(dpy, False);
1203 while(running && !XNextEvent(dpy, &ev)) {
1204 if(handler[ev.type])
1205 (handler[ev.type])(&ev); /* call handler */
1206 }
1207 }
1208
1209 void
1210 scan(void) {
1211 unsigned int i, num;
1212 Window d1, d2, *wins = NULL;
1213 XWindowAttributes wa;
1214
1215 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1216 for(i = 0; i < num; i++) {
1217 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1218 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1219 continue;
1220 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1221 manage(wins[i], &wa);
1222 }
1223 for(i = 0; i < num; i++) { /* now the transients */
1224 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1225 continue;
1226 if(XGetTransientForHint(dpy, wins[i], &d1)
1227 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1228 manage(wins[i], &wa);
1229 }
1230 if(wins)
1231 XFree(wins);
1232 }
1233 }
1234
1235 void
1236 setclientstate(Client *c, long state) {
1237 long data[] = {state, None};
1238
1239 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1240 PropModeReplace, (unsigned char *)data, 2);
1241 }
1242
1243 void
1244 setlayout(const Arg *arg) {
1245 if(!arg || !arg->v || arg->v != lt[sellt])
1246 sellt ^= 1;
1247 if(arg && arg->v)
1248 lt[sellt] = (Layout *)arg->v;
1249 if(sel)
1250 arrange();
1251 else
1252 drawbar();
1253 }
1254
1255 /* arg > 1.0 will set mfact absolutly */
1256 void
1257 setmfact(const Arg *arg) {
1258 float f;
1259
1260 if(!arg || !lt[sellt]->arrange)
1261 return;
1262 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1263 if(f < 0.1 || f > 0.9)
1264 return;
1265 mfact = f;
1266 arrange();
1267 }
1268
1269 void
1270 setup(void) {
1271 unsigned int i;
1272 int w;
1273 XSetWindowAttributes wa;
1274
1275 /* init screen */
1276 screen = DefaultScreen(dpy);
1277 root = RootWindow(dpy, screen);
1278 initfont(font);
1279 sx = 0;
1280 sy = 0;
1281 sw = DisplayWidth(dpy, screen);
1282 sh = DisplayHeight(dpy, screen);
1283 bh = dc.h = dc.font.height + 2;
1284 lt[0] = &layouts[0];
1285 lt[1] = &layouts[1 % LENGTH(layouts)];
1286 updategeom();
1287
1288 /* init atoms */
1289 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1290 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1291 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1292 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1293 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1294
1295 /* init cursors */
1296 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1297 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1298 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1299
1300 /* init appearance */
1301 dc.norm[ColBorder] = getcolor(normbordercolor);
1302 dc.norm[ColBG] = getcolor(normbgcolor);
1303 dc.norm[ColFG] = getcolor(normfgcolor);
1304 dc.sel[ColBorder] = getcolor(selbordercolor);
1305 dc.sel[ColBG] = getcolor(selbgcolor);
1306 dc.sel[ColFG] = getcolor(selfgcolor);
1307 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1308 dc.gc = XCreateGC(dpy, root, 0, 0);
1309 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1310 if(!dc.font.set)
1311 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1312
1313 /* init bar */
1314 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1315 w = TEXTW(layouts[i].symbol);
1316 blw = MAX(blw, w);
1317 }
1318
1319 wa.override_redirect = 1;
1320 wa.background_pixmap = ParentRelative;
1321 wa.event_mask = ButtonPressMask|ExposureMask;
1322
1323 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1324 CopyFromParent, DefaultVisual(dpy, screen),
1325 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1326 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1327 XMapRaised(dpy, barwin);
1328 updatestatus();
1329
1330 /* EWMH support per view */
1331 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1332 PropModeReplace, (unsigned char *) netatom, NetLast);
1333
1334 /* select for events */
1335 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1336 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1337 |PropertyChangeMask;
1338 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1339 XSelectInput(dpy, root, wa.event_mask);
1340
1341 grabkeys();
1342 }
1343
1344 void
1345 showhide(Client *c) {
1346 if(!c)
1347 return;
1348 if(ISVISIBLE(c)) { /* show clients top down */
1349 adjustborder(c, False);
1350 XMoveWindow(dpy, c->win, c->x, c->y);
1351 if(!lt[sellt]->arrange || c->isfloating)
1352 resize(c, c->x, c->y, c->w, c->h, True);
1353 showhide(c->snext);
1354 }
1355 else { /* hide clients bottom up */
1356 showhide(c->snext);
1357 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1358 }
1359 }
1360
1361
1362 void
1363 sigchld(int signal) {
1364 while(0 < waitpid(-1, NULL, WNOHANG));
1365 }
1366
1367 void
1368 spawn(const Arg *arg) {
1369 signal(SIGCHLD, sigchld);
1370 if(fork() == 0) {
1371 if(dpy)
1372 close(ConnectionNumber(dpy));
1373 setsid();
1374 execvp(((char **)arg->v)[0], (char **)arg->v);
1375 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1376 perror(" failed");
1377 exit(0);
1378 }
1379 }
1380
1381 void
1382 tag(const Arg *arg) {
1383 if(sel && arg->ui & TAGMASK) {
1384 sel->tags = arg->ui & TAGMASK;
1385 arrange();
1386 }
1387 }
1388
1389 int
1390 textnw(const char *text, unsigned int len) {
1391 XRectangle r;
1392
1393 if(dc.font.set) {
1394 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1395 return r.width;
1396 }
1397 return XTextWidth(dc.font.xfont, text, len);
1398 }
1399
1400 void
1401 tile(void) {
1402 int x, y, h, w, mw;
1403 unsigned int i, n;
1404 Client *c;
1405
1406 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1407 if(n == 0)
1408 return;
1409
1410 /* master */
1411 c = nexttiled(clients);
1412 mw = mfact * ww;
1413 adjustborder(c, n == 1);
1414 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1415
1416 if(--n == 0)
1417 return;
1418
1419 /* tile stack */
1420 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1421 y = wy;
1422 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1423 h = wh / n;
1424 if(h < bh)
1425 h = wh;
1426
1427 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1428 adjustborder(c, False);
1429 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1430 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw), resizehints);
1431 if(h != wh)
1432 y = c->y + HEIGHT(c);
1433 }
1434 }
1435
1436 void
1437 togglebar(const Arg *arg) {
1438 showbar = !showbar;
1439 updategeom();
1440 updatebar();
1441 arrange();
1442 }
1443
1444 void
1445 togglefloating(const Arg *arg) {
1446 if(!sel)
1447 return;
1448 sel->isfloating = !sel->isfloating || sel->isfixed;
1449 if(sel->isfloating)
1450 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1451 arrange();
1452 }
1453
1454 void
1455 toggletag(const Arg *arg) {
1456 unsigned int mask;
1457
1458 if (!sel)
1459 return;
1460
1461 mask = sel->tags ^ (arg->ui & TAGMASK);
1462 if(sel && mask) {
1463 sel->tags = mask;
1464 arrange();
1465 }
1466 }
1467
1468 void
1469 toggleview(const Arg *arg) {
1470 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1471
1472 if(mask) {
1473 tagset[seltags] = mask;
1474 arrange();
1475 }
1476 }
1477
1478 void
1479 unmanage(Client *c) {
1480 XWindowChanges wc;
1481
1482 wc.border_width = c->oldbw;
1483 /* The server grab construct avoids race conditions. */
1484 XGrabServer(dpy);
1485 XSetErrorHandler(xerrordummy);
1486 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1487 detach(c);
1488 detachstack(c);
1489 if(sel == c)
1490 focus(NULL);
1491 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1492 setclientstate(c, WithdrawnState);
1493 free(c);
1494 XSync(dpy, False);
1495 XSetErrorHandler(xerror);
1496 XUngrabServer(dpy);
1497 arrange();
1498 }
1499
1500 void
1501 unmapnotify(XEvent *e) {
1502 Client *c;
1503 XUnmapEvent *ev = &e->xunmap;
1504
1505 if((c = getclient(ev->window)))
1506 unmanage(c);
1507 }
1508
1509 void
1510 updatebar(void) {
1511 if(dc.drawable != 0)
1512 XFreePixmap(dpy, dc.drawable);
1513 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1514 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1515 }
1516
1517 void
1518 updategeom(void) {
1519 #ifdef XINERAMA
1520 int n, i = 0;
1521 XineramaScreenInfo *info = NULL;
1522
1523 /* window area geometry */
1524 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1525 if(n > 1) {
1526 int di, x, y;
1527 unsigned int dui;
1528 Window dummy;
1529 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1530 for(i = 0; i < n; i++)
1531 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1532 break;
1533 }
1534 wx = info[i].x_org;
1535 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1536 ww = info[i].width;
1537 wh = showbar ? info[i].height - bh : info[i].height;
1538 XFree(info);
1539 }
1540 else
1541 #endif
1542 {
1543 wx = sx;
1544 wy = showbar && topbar ? sy + bh : sy;
1545 ww = sw;
1546 wh = showbar ? sh - bh : sh;
1547 }
1548
1549 /* bar position */
1550 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1551 }
1552
1553 void
1554 updatenumlockmask(void) {
1555 unsigned int i, j;
1556 XModifierKeymap *modmap;
1557
1558 numlockmask = 0;
1559 modmap = XGetModifierMapping(dpy);
1560 for(i = 0; i < 8; i++)
1561 for(j = 0; j < modmap->max_keypermod; j++)
1562 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
1563 numlockmask = (1 << i);
1564 XFreeModifiermap(modmap);
1565 }
1566
1567 void
1568 updatesizehints(Client *c) {
1569 long msize;
1570 XSizeHints size;
1571
1572 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1573 /* size is uninitialized, ensure that size.flags aren't used */
1574 size.flags = PSize;
1575 if(size.flags & PBaseSize) {
1576 c->basew = size.base_width;
1577 c->baseh = size.base_height;
1578 }
1579 else if(size.flags & PMinSize) {
1580 c->basew = size.min_width;
1581 c->baseh = size.min_height;
1582 }
1583 else
1584 c->basew = c->baseh = 0;
1585 if(size.flags & PResizeInc) {
1586 c->incw = size.width_inc;
1587 c->inch = size.height_inc;
1588 }
1589 else
1590 c->incw = c->inch = 0;
1591 if(size.flags & PMaxSize) {
1592 c->maxw = size.max_width;
1593 c->maxh = size.max_height;
1594 }
1595 else
1596 c->maxw = c->maxh = 0;
1597 if(size.flags & PMinSize) {
1598 c->minw = size.min_width;
1599 c->minh = size.min_height;
1600 }
1601 else if(size.flags & PBaseSize) {
1602 c->minw = size.base_width;
1603 c->minh = size.base_height;
1604 }
1605 else
1606 c->minw = c->minh = 0;
1607 if(size.flags & PAspect) {
1608 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1609 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1610 }
1611 else
1612 c->maxa = c->mina = 0.0;
1613 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1614 && c->maxw == c->minw && c->maxh == c->minh);
1615 }
1616
1617 void
1618 updatetitle(Client *c) {
1619 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1620 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1621 }
1622
1623 void
1624 updatestatus() {
1625 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1626 strcpy(stext, "dwm-"VERSION);
1627 drawbar();
1628 }
1629
1630 void
1631 updatewmhints(Client *c) {
1632 XWMHints *wmh;
1633
1634 if((wmh = XGetWMHints(dpy, c->win))) {
1635 if(c == sel && wmh->flags & XUrgencyHint) {
1636 wmh->flags &= ~XUrgencyHint;
1637 XSetWMHints(dpy, c->win, wmh);
1638 }
1639 else
1640 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1641
1642 XFree(wmh);
1643 }
1644 }
1645
1646 void
1647 view(const Arg *arg) {
1648 if((arg->ui & TAGMASK) == tagset[seltags])
1649 return;
1650 seltags ^= 1; /* toggle sel tagset */
1651 if(arg->ui & TAGMASK)
1652 tagset[seltags] = arg->ui & TAGMASK;
1653 arrange();
1654 }
1655
1656 /* There's no way to check accesses to destroyed windows, thus those cases are
1657 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1658 * default error handler, which may call exit. */
1659 int
1660 xerror(Display *dpy, XErrorEvent *ee) {
1661 if(ee->error_code == BadWindow
1662 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1663 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1664 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1665 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1666 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1667 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1668 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1669 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1670 return 0;
1671 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1672 ee->request_code, ee->error_code);
1673 return xerrorxlib(dpy, ee); /* may call exit */
1674 }
1675
1676 int
1677 xerrordummy(Display *dpy, XErrorEvent *ee) {
1678 return 0;
1679 }
1680
1681 /* Startup Error handler to check if another window manager
1682 * is already running. */
1683 int
1684 xerrorstart(Display *dpy, XErrorEvent *ee) {
1685 otherwm = True;
1686 return -1;
1687 }
1688
1689 void
1690 zoom(const Arg *arg) {
1691 Client *c = sel;
1692
1693 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1694 return;
1695 if(c == nexttiled(clients))
1696 if(!c || !(c = nexttiled(c->next)))
1697 return;
1698 detach(c);
1699 attach(c);
1700 focus(c);
1701 arrange();
1702 }
1703
1704 int
1705 main(int argc, char *argv[]) {
1706 if(argc == 2 && !strcmp("-v", argv[1]))
1707 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1708 else if(argc != 1)
1709 die("usage: dwm [-v]\n");
1710
1711 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1712 fprintf(stderr, "warning: no locale support\n");
1713
1714 if(!(dpy = XOpenDisplay(0)))
1715 die("dwm: cannot open display\n");
1716
1717 checkotherwm();
1718 setup();
1719 scan();
1720 run();
1721 cleanup();
1722
1723 XCloseDisplay(dpy);
1724 return 0;
1725 }