dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * 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 */
59enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
60enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
61enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
62enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
63enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
64 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
65
66typedef union {
67 int i;
68 unsigned int ui;
69 float f;
70 void *v;
71} Arg;
72
73typedef 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
81typedef struct Client Client;
82struct 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
95typedef 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
110typedef struct {
111 unsigned int mod;
112 KeySym keysym;
113 void (*func)(const Arg *);
114 const Arg arg;
115} Key;
116
117typedef struct {
118 const char *symbol;
119 void (*arrange)(void);
120} Layout;
121
122typedef 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 */
131static void adjustborder(Client *c, unsigned int bw);
132static void applyrules(Client *c);
133static void arrange(void);
134static void attach(Client *c);
135static void attachstack(Client *c);
136static void buttonpress(XEvent *e);
137static void checkotherwm(void);
138static void cleanup(void);
139static void clearurgent(Client *c);
140static void configure(Client *c);
141static void configurenotify(XEvent *e);
142static void configurerequest(XEvent *e);
143static void destroynotify(XEvent *e);
144static void detach(Client *c);
145static void detachstack(Client *c);
146static void die(const char *errstr, ...);
147static void drawbar(void);
148static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
149static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
150static void enternotify(XEvent *e);
151static void expose(XEvent *e);
152static void focus(Client *c);
153static void focusin(XEvent *e);
154static void focusstack(const Arg *arg);
155static Client *getclient(Window w);
156static unsigned long getcolor(const char *colstr);
157static long getstate(Window w);
158static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
159static void grabbuttons(Client *c, Bool focused);
160static void grabkeys(void);
161static void initfont(const char *fontstr);
162static Bool isprotodel(Client *c);
163static void keypress(XEvent *e);
164static void killclient(const Arg *arg);
165static void manage(Window w, XWindowAttributes *wa);
166static void mappingnotify(XEvent *e);
167static void maprequest(XEvent *e);
168static void monocle(void);
169static void movemouse(const Arg *arg);
170static Client *nexttiled(Client *c);
171static void propertynotify(XEvent *e);
172static void quit(const Arg *arg);
173static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
174static void resizemouse(const Arg *arg);
175static void restack(void);
176static void run(void);
177static void scan(void);
178static void setclientstate(Client *c, long state);
179static void setlayout(const Arg *arg);
180static void setmfact(const Arg *arg);
181static void setup(void);
182static void showhide(Client *c);
183static void sigchld(int signal);
184static void spawn(const Arg *arg);
185static void tag(const Arg *arg);
186static int textnw(const char *text, unsigned int len);
187static void tile(void);
188static void togglebar(const Arg *arg);
189static void togglefloating(const Arg *arg);
190static void toggletag(const Arg *arg);
191static void toggleview(const Arg *arg);
192static void unmanage(Client *c);
193static void unmapnotify(XEvent *e);
194static void updatebar(void);
195static void updategeom(void);
196static void updatenumlockmask(void);
197static void updatesizehints(Client *c);
198static void updatestatus(void);
199static void updatetitle(Client *c);
200static void updatewmhints(Client *c);
201static void view(const Arg *arg);
202static int xerror(Display *dpy, XErrorEvent *ee);
203static int xerrordummy(Display *dpy, XErrorEvent *ee);
204static int xerrorstart(Display *dpy, XErrorEvent *ee);
205static void zoom(const Arg *arg);
206
207/* variables */
208static char stext[256];
209static int screen;
210static int sx, sy, sw, sh; /* X display screen geometry x, y, width, height */
211static int by, bh, blw; /* bar geometry y, height and layout symbol width */
212static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
213static unsigned int seltags = 0, sellt = 0;
214static int (*xerrorxlib)(Display *, XErrorEvent *);
215static unsigned int numlockmask = 0;
216static 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};
230static Atom wmatom[WMLast], netatom[NetLast];
231static Bool otherwm;
232static Bool running = True;
233static Client *clients = NULL;
234static Client *sel = NULL;
235static Client *stack = NULL;
236static Cursor cursor[CurLast];
237static Display *dpy;
238static DC dc;
239static Layout *lt[] = { NULL, NULL };
240static 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. */
245struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
246
247/* function implementations */
248void
249adjustborder(Client *c, unsigned int bw) {
250 XWindowChanges wc;
251
252 if(c->bw != bw) {
253 c->bw = wc.border_width = bw;
254 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
255 }
256}
257
258void
259applyrules(Client *c) {
260 unsigned int i;
261 Rule *r;
262 XClassHint ch = { 0 };
263
264 /* rule matching */
265 if(XGetClassHint(dpy, c->win, &ch)) {
266 for(i = 0; i < LENGTH(rules); i++) {
267 r = &rules[i];
268 if((!r->title || strstr(c->name, r->title))
269 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
270 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
271 c->isfloating = r->isfloating;
272 c->tags |= r->tags & TAGMASK ? r->tags & TAGMASK : tagset[seltags];
273 }
274 }
275 if(ch.res_class)
276 XFree(ch.res_class);
277 if(ch.res_name)
278 XFree(ch.res_name);
279 }
280 if(!c->tags)
281 c->tags = tagset[seltags];
282}
283
284void
285arrange(void) {
286 showhide(stack);
287 focus(NULL);
288 if(lt[sellt]->arrange)
289 lt[sellt]->arrange();
290 restack();
291}
292
293void
294attach(Client *c) {
295 c->next = clients;
296 clients = c;
297}
298
299void
300attachstack(Client *c) {
301 c->snext = stack;
302 stack = c;
303}
304
305void
306buttonpress(XEvent *e) {
307 unsigned int i, x, click;
308 Arg arg = {0};
309 Client *c;
310 XButtonPressedEvent *ev = &e->xbutton;
311
312 click = ClkRootWin;
313 if(ev->window == barwin) {
314 i = x = 0;
315 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
316 if(i < LENGTH(tags)) {
317 click = ClkTagBar;
318 arg.ui = 1 << i;
319 }
320 else if(ev->x < x + blw)
321 click = ClkLtSymbol;
322 else if(ev->x > wx + ww - TEXTW(stext))
323 click = ClkStatusText;
324 else
325 click = ClkWinTitle;
326 }
327 else if((c = getclient(ev->window))) {
328 focus(c);
329 click = ClkClientWin;
330 }
331
332 for(i = 0; i < LENGTH(buttons); i++)
333 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
334 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
335 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
336}
337
338void
339checkotherwm(void) {
340 otherwm = False;
341 xerrorxlib = XSetErrorHandler(xerrorstart);
342
343 /* this causes an error if some other window manager is running */
344 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
345 XSync(dpy, False);
346 if(otherwm)
347 die("dwm: another window manager is already running\n");
348 XSetErrorHandler(xerror);
349 XSync(dpy, False);
350}
351
352void
353cleanup(void) {
354 Arg a = {.ui = ~0};
355 Layout foo = { "", NULL };
356
357 view(&a);
358 lt[sellt] = &foo;
359 while(stack)
360 unmanage(stack);
361 if(dc.font.set)
362 XFreeFontSet(dpy, dc.font.set);
363 else
364 XFreeFont(dpy, dc.font.xfont);
365 XUngrabKey(dpy, AnyKey, AnyModifier, root);
366 XFreePixmap(dpy, dc.drawable);
367 XFreeGC(dpy, dc.gc);
368 XFreeCursor(dpy, cursor[CurNormal]);
369 XFreeCursor(dpy, cursor[CurResize]);
370 XFreeCursor(dpy, cursor[CurMove]);
371 XDestroyWindow(dpy, barwin);
372 XSync(dpy, False);
373 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
374}
375
376void
377clearurgent(Client *c) {
378 XWMHints *wmh;
379
380 c->isurgent = False;
381 if(!(wmh = XGetWMHints(dpy, c->win)))
382 return;
383 wmh->flags &= ~XUrgencyHint;
384 XSetWMHints(dpy, c->win, wmh);
385 XFree(wmh);
386}
387
388void
389configure(Client *c) {
390 XConfigureEvent ce;
391
392 ce.type = ConfigureNotify;
393 ce.display = dpy;
394 ce.event = c->win;
395 ce.window = c->win;
396 ce.x = c->x;
397 ce.y = c->y;
398 ce.width = c->w;
399 ce.height = c->h;
400 ce.border_width = c->bw;
401 ce.above = None;
402 ce.override_redirect = False;
403 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
404}
405
406void
407configurenotify(XEvent *e) {
408 XConfigureEvent *ev = &e->xconfigure;
409
410 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
411 sw = ev->width;
412 sh = ev->height;
413 updategeom();
414 updatebar();
415 arrange();
416 }
417}
418
419void
420configurerequest(XEvent *e) {
421 Client *c;
422 XConfigureRequestEvent *ev = &e->xconfigurerequest;
423 XWindowChanges wc;
424
425 if((c = getclient(ev->window))) {
426 if(ev->value_mask & CWBorderWidth)
427 c->bw = ev->border_width;
428 else if(c->isfloating || !lt[sellt]->arrange) {
429 if(ev->value_mask & CWX)
430 c->x = sx + ev->x;
431 if(ev->value_mask & CWY)
432 c->y = sy + ev->y;
433 if(ev->value_mask & CWWidth)
434 c->w = ev->width;
435 if(ev->value_mask & CWHeight)
436 c->h = ev->height;
437 if((c->x - sx + c->w) > sw && c->isfloating)
438 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
439 if((c->y - sy + c->h) > sh && c->isfloating)
440 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
441 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
442 configure(c);
443 if(ISVISIBLE(c))
444 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
445 }
446 else
447 configure(c);
448 }
449 else {
450 wc.x = ev->x;
451 wc.y = ev->y;
452 wc.width = ev->width;
453 wc.height = ev->height;
454 wc.border_width = ev->border_width;
455 wc.sibling = ev->above;
456 wc.stack_mode = ev->detail;
457 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
458 }
459 XSync(dpy, False);
460}
461
462void
463destroynotify(XEvent *e) {
464 Client *c;
465 XDestroyWindowEvent *ev = &e->xdestroywindow;
466
467 if((c = getclient(ev->window)))
468 unmanage(c);
469}
470
471void
472detach(Client *c) {
473 Client **tc;
474
475 for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
476 *tc = c->next;
477}
478
479void
480detachstack(Client *c) {
481 Client **tc;
482
483 for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
484 *tc = c->snext;
485}
486
487void
488die(const char *errstr, ...) {
489 va_list ap;
490
491 va_start(ap, errstr);
492 vfprintf(stderr, errstr, ap);
493 va_end(ap);
494 exit(EXIT_FAILURE);
495}
496
497void
498drawbar(void) {
499 int x;
500 unsigned int i, occ = 0, urg = 0;
501 unsigned long *col;
502 Client *c;
503
504 for(c = clients; c; c = c->next) {
505 occ |= c->tags;
506 if(c->isurgent)
507 urg |= c->tags;
508 }
509
510 dc.x = 0;
511 for(i = 0; i < LENGTH(tags); i++) {
512 dc.w = TEXTW(tags[i]);
513 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
514 drawtext(tags[i], col, urg & 1 << i);
515 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
516 dc.x += dc.w;
517 }
518 if(blw > 0) {
519 dc.w = blw;
520 drawtext(lt[sellt]->symbol, dc.norm, False);
521 x = dc.x + dc.w;
522 }
523 else
524 x = dc.x;
525 dc.w = TEXTW(stext);
526 dc.x = ww - dc.w;
527 if(dc.x < x) {
528 dc.x = x;
529 dc.w = ww - x;
530 }
531 drawtext(stext, dc.norm, False);
532 if((dc.w = dc.x - x) > bh) {
533 dc.x = x;
534 if(sel) {
535 drawtext(sel->name, dc.sel, False);
536 drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
537 }
538 else
539 drawtext(NULL, dc.norm, False);
540 }
541 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
542 XSync(dpy, False);
543}
544
545void
546drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
547 int x;
548 XGCValues gcv;
549 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
550
551 gcv.foreground = col[invert ? ColBG : ColFG];
552 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
553 x = (dc.font.ascent + dc.font.descent + 2) / 4;
554 r.x = dc.x + 1;
555 r.y = dc.y + 1;
556 if(filled) {
557 r.width = r.height = x + 1;
558 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
559 }
560 else if(empty) {
561 r.width = r.height = x;
562 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
563 }
564}
565
566void
567drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
568 char buf[256];
569 int i, x, y, h, len, olen;
570 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
571
572 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
573 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
574 if(!text)
575 return;
576 olen = strlen(text);
577 h = dc.font.ascent + dc.font.descent;
578 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
579 x = dc.x + (h / 2);
580 /* shorten text if necessary */
581 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
582 if(!len)
583 return;
584 memcpy(buf, text, len);
585 if(len < olen)
586 for(i = len; i && i > len - 3; buf[--i] = '.');
587 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
588 if(dc.font.set)
589 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
590 else
591 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
592}
593
594void
595enternotify(XEvent *e) {
596 Client *c;
597 XCrossingEvent *ev = &e->xcrossing;
598
599 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
600 return;
601 if((c = getclient(ev->window)))
602 focus(c);
603 else
604 focus(NULL);
605}
606
607void
608expose(XEvent *e) {
609 XExposeEvent *ev = &e->xexpose;
610
611 if(ev->count == 0 && (ev->window == barwin))
612 drawbar();
613}
614
615void
616focus(Client *c) {
617 if(!c || !ISVISIBLE(c))
618 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
619 if(sel && sel != c) {
620 grabbuttons(sel, False);
621 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
622 }
623 if(c) {
624 if(c->isurgent)
625 clearurgent(c);
626 detachstack(c);
627 attachstack(c);
628 grabbuttons(c, True);
629 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
630 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
631 }
632 else
633 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
634 sel = c;
635 drawbar();
636}
637
638void
639focusin(XEvent *e) { /* there are some broken focus acquiring clients */
640 XFocusChangeEvent *ev = &e->xfocus;
641
642 if(sel && ev->window != sel->win)
643 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
644}
645
646void
647focusstack(const Arg *arg) {
648 Client *c = NULL, *i;
649
650 if(!sel)
651 return;
652 if (arg->i > 0) {
653 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
654 if(!c)
655 for(c = clients; c && !ISVISIBLE(c); c = c->next);
656 }
657 else {
658 for(i = clients; i != sel; i = i->next)
659 if(ISVISIBLE(i))
660 c = i;
661 if(!c)
662 for(; i; i = i->next)
663 if(ISVISIBLE(i))
664 c = i;
665 }
666 if(c) {
667 focus(c);
668 restack();
669 }
670}
671
672Client *
673getclient(Window w) {
674 Client *c;
675
676 for(c = clients; c && c->win != w; c = c->next);
677 return c;
678}
679
680unsigned long
681getcolor(const char *colstr) {
682 Colormap cmap = DefaultColormap(dpy, screen);
683 XColor color;
684
685 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
686 die("error, cannot allocate color '%s'\n", colstr);
687 return color.pixel;
688}
689
690long
691getstate(Window w) {
692 int format, status;
693 long result = -1;
694 unsigned char *p = NULL;
695 unsigned long n, extra;
696 Atom real;
697
698 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
699 &real, &format, &n, &extra, (unsigned char **)&p);
700 if(status != Success)
701 return -1;
702 if(n != 0)
703 result = *p;
704 XFree(p);
705 return result;
706}
707
708Bool
709gettextprop(Window w, Atom atom, char *text, unsigned int size) {
710 char **list = NULL;
711 int n;
712 XTextProperty name;
713
714 if(!text || size == 0)
715 return False;
716 text[0] = '\0';
717 XGetTextProperty(dpy, w, &name, atom);
718 if(!name.nitems)
719 return False;
720 if(name.encoding == XA_STRING)
721 strncpy(text, (char *)name.value, size - 1);
722 else {
723 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
724 && n > 0 && *list) {
725 strncpy(text, *list, size - 1);
726 XFreeStringList(list);
727 }
728 }
729 text[size - 1] = '\0';
730 XFree(name.value);
731 return True;
732}
733
734void
735grabbuttons(Client *c, Bool focused) {
736 updatenumlockmask();
737 {
738 unsigned int i, j;
739 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
740 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
741 if(focused) {
742 for(i = 0; i < LENGTH(buttons); i++)
743 if(buttons[i].click == ClkClientWin)
744 for(j = 0; j < LENGTH(modifiers); j++)
745 XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
746 } else
747 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
748 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
749 }
750}
751
752void
753grabkeys(void) {
754 updatenumlockmask();
755 { /* grab keys */
756 unsigned int i, j;
757 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
758 KeyCode code;
759
760 XUngrabKey(dpy, AnyKey, AnyModifier, root);
761 for(i = 0; i < LENGTH(keys); i++) {
762 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
763 for(j = 0; j < LENGTH(modifiers); j++)
764 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
765 True, GrabModeAsync, GrabModeAsync);
766 }
767 }
768}
769
770void
771initfont(const char *fontstr) {
772 char *def, **missing;
773 int i, n;
774
775 missing = NULL;
776 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
777 if(missing) {
778 while(n--)
779 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
780 XFreeStringList(missing);
781 }
782 if(dc.font.set) {
783 XFontSetExtents *font_extents;
784 XFontStruct **xfonts;
785 char **font_names;
786 dc.font.ascent = dc.font.descent = 0;
787 font_extents = XExtentsOfFontSet(dc.font.set);
788 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
789 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
790 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
791 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
792 xfonts++;
793 }
794 }
795 else {
796 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
797 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
798 die("error, cannot load font: '%s'\n", fontstr);
799 dc.font.ascent = dc.font.xfont->ascent;
800 dc.font.descent = dc.font.xfont->descent;
801 }
802 dc.font.height = dc.font.ascent + dc.font.descent;
803}
804
805Bool
806isprotodel(Client *c) {
807 int i, n;
808 Atom *protocols;
809 Bool ret = False;
810
811 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
812 for(i = 0; !ret && i < n; i++)
813 if(protocols[i] == wmatom[WMDelete])
814 ret = True;
815 XFree(protocols);
816 }
817 return ret;
818}
819
820void
821keypress(XEvent *e) {
822 unsigned int i;
823 KeySym keysym;
824 XKeyEvent *ev;
825
826 ev = &e->xkey;
827 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
828 for(i = 0; i < LENGTH(keys); i++)
829 if(keysym == keys[i].keysym
830 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
831 && keys[i].func)
832 keys[i].func(&(keys[i].arg));
833}
834
835void
836killclient(const Arg *arg) {
837 XEvent ev;
838
839 if(!sel)
840 return;
841 if(isprotodel(sel)) {
842 ev.type = ClientMessage;
843 ev.xclient.window = sel->win;
844 ev.xclient.message_type = wmatom[WMProtocols];
845 ev.xclient.format = 32;
846 ev.xclient.data.l[0] = wmatom[WMDelete];
847 ev.xclient.data.l[1] = CurrentTime;
848 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
849 }
850 else
851 XKillClient(dpy, sel->win);
852}
853
854void
855manage(Window w, XWindowAttributes *wa) {
856 static Client cz;
857 Client *c, *t = NULL;
858 Window trans = None;
859 XWindowChanges wc;
860
861 if(!(c = malloc(sizeof(Client))))
862 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
863 *c = cz;
864 c->win = w;
865
866 /* geometry */
867 c->x = wa->x;
868 c->y = wa->y;
869 c->w = wa->width;
870 c->h = wa->height;
871 c->oldbw = wa->border_width;
872 if(c->w == sw && c->h == sh) {
873 c->x = sx;
874 c->y = sy;
875 c->bw = 0;
876 }
877 else {
878 if(c->x + WIDTH(c) > sx + sw)
879 c->x = sx + sw - WIDTH(c);
880 if(c->y + HEIGHT(c) > sy + sh)
881 c->y = sy + sh - HEIGHT(c);
882 c->x = MAX(c->x, sx);
883 /* only fix client y-offset, if the client center might cover the bar */
884 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
885 c->bw = borderpx;
886 }
887
888 wc.border_width = c->bw;
889 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
890 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
891 configure(c); /* propagates border_width, if size doesn't change */
892 updatesizehints(c);
893 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
894 grabbuttons(c, False);
895 updatetitle(c);
896 if(XGetTransientForHint(dpy, w, &trans))
897 t = getclient(trans);
898 if(t)
899 c->tags = t->tags;
900 else
901 applyrules(c);
902 if(!c->isfloating)
903 c->isfloating = trans != None || c->isfixed;
904 if(c->isfloating)
905 XRaiseWindow(dpy, c->win);
906 attach(c);
907 attachstack(c);
908 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
909 XMapWindow(dpy, c->win);
910 setclientstate(c, NormalState);
911 arrange();
912}
913
914void
915mappingnotify(XEvent *e) {
916 XMappingEvent *ev = &e->xmapping;
917
918 XRefreshKeyboardMapping(ev);
919 if(ev->request == MappingKeyboard)
920 grabkeys();
921}
922
923void
924maprequest(XEvent *e) {
925 static XWindowAttributes wa;
926 XMapRequestEvent *ev = &e->xmaprequest;
927
928 if(!XGetWindowAttributes(dpy, ev->window, &wa))
929 return;
930 if(wa.override_redirect)
931 return;
932 if(!getclient(ev->window))
933 manage(ev->window, &wa);
934}
935
936void
937monocle(void) {
938 unsigned int n;
939 Client *c;
940
941 for(n = 0, c = nexttiled(clients); c && n < 2; c = nexttiled(c->next), n++);
942 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
943 adjustborder(c, n == 1 ? 0 : borderpx);
944 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
945 }
946}
947
948void
949movemouse(const Arg *arg) {
950 int x, y, ocx, ocy, di, nx, ny;
951 unsigned int dui;
952 Client *c;
953 Window dummy;
954 XEvent ev;
955
956 if(!(c = sel))
957 return;
958 restack();
959 ocx = c->x;
960 ocy = c->y;
961 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
962 None, cursor[CurMove], CurrentTime) != GrabSuccess)
963 return;
964 XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
965 if(usegrab)
966 XGrabServer(dpy);
967 do {
968 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
969 switch (ev.type) {
970 case ConfigureRequest:
971 case Expose:
972 case MapRequest:
973 handler[ev.type](&ev);
974 break;
975 case MotionNotify:
976 nx = ocx + (ev.xmotion.x - x);
977 ny = ocy + (ev.xmotion.y - y);
978 if(snap && nx >= wx && nx <= wx + ww
979 && ny >= wy && ny <= wy + wh) {
980 if(abs(wx - nx) < snap)
981 nx = wx;
982 else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
983 nx = wx + ww - WIDTH(c);
984 if(abs(wy - ny) < snap)
985 ny = wy;
986 else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
987 ny = wy + wh - HEIGHT(c);
988 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
989 togglefloating(NULL);
990 }
991 if(!lt[sellt]->arrange || c->isfloating)
992 resize(c, nx, ny, c->w, c->h, False);
993 break;
994 }
995 }
996 while(ev.type != ButtonRelease);
997 if(usegrab)
998 XUngrabServer(dpy);
999 XUngrabPointer(dpy, CurrentTime);
1000}
1001
1002Client *
1003nexttiled(Client *c) {
1004 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1005 return c;
1006}
1007
1008void
1009propertynotify(XEvent *e) {
1010 Client *c;
1011 Window trans;
1012 XPropertyEvent *ev = &e->xproperty;
1013
1014 if((ev->window == root) && (ev->atom = XA_WM_NAME))
1015 updatestatus();
1016 else if(ev->state == PropertyDelete)
1017 return; /* ignore */
1018 else if((c = getclient(ev->window))) {
1019 switch (ev->atom) {
1020 default: break;
1021 case XA_WM_TRANSIENT_FOR:
1022 XGetTransientForHint(dpy, c->win, &trans);
1023 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1024 arrange();
1025 break;
1026 case XA_WM_NORMAL_HINTS:
1027 updatesizehints(c);
1028 break;
1029 case XA_WM_HINTS:
1030 updatewmhints(c);
1031 drawbar();
1032 break;
1033 }
1034 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1035 updatetitle(c);
1036 if(c == sel)
1037 drawbar();
1038 }
1039 }
1040}
1041
1042void
1043quit(const Arg *arg) {
1044 running = False;
1045}
1046
1047void
1048resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1049 XWindowChanges wc;
1050
1051 if(sizehints) {
1052 /* see last two sentences in ICCCM 4.1.2.3 */
1053 Bool baseismin = c->basew == c->minw && c->baseh == c->minh;
1054
1055 /* set minimum possible */
1056 w = MAX(1, w);
1057 h = MAX(1, h);
1058
1059 if(!baseismin) { /* temporarily remove base dimensions */
1060 w -= c->basew;
1061 h -= c->baseh;
1062 }
1063
1064 /* adjust for aspect limits */
1065 if(c->mina > 0 && c->maxa > 0) {
1066 if(c->maxa < (float)w / h)
1067 w = h * c->maxa;
1068 else if(c->mina < (float)h / w)
1069 h = w * c->mina;
1070 }
1071
1072 if(baseismin) { /* increment calculation requires this */
1073 w -= c->basew;
1074 h -= c->baseh;
1075 }
1076
1077 /* adjust for increment value */
1078 if(c->incw)
1079 w -= w % c->incw;
1080 if(c->inch)
1081 h -= h % c->inch;
1082
1083 /* restore base dimensions */
1084 w += c->basew;
1085 h += c->baseh;
1086
1087 w = MAX(w, c->minw);
1088 h = MAX(h, c->minh);
1089
1090 if(c->maxw)
1091 w = MIN(w, c->maxw);
1092
1093 if(c->maxh)
1094 h = MIN(h, c->maxh);
1095 }
1096 if(w <= 0 || h <= 0)
1097 return;
1098 if(x > sx + sw)
1099 x = sw - WIDTH(c);
1100 if(y > sy + sh)
1101 y = sh - HEIGHT(c);
1102 if(x + w + 2 * c->bw < sx)
1103 x = sx;
1104 if(y + h + 2 * c->bw < sy)
1105 y = sy;
1106 if(h < bh)
1107 h = bh;
1108 if(w < bh)
1109 w = bh;
1110 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1111 c->x = wc.x = x;
1112 c->y = wc.y = y;
1113 c->w = wc.width = w;
1114 c->h = wc.height = h;
1115 wc.border_width = c->bw;
1116 XConfigureWindow(dpy, c->win,
1117 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1118 configure(c);
1119 XSync(dpy, False);
1120 }
1121}
1122
1123void
1124resizemouse(const Arg *arg) {
1125 int ocx, ocy;
1126 int nw, nh;
1127 Client *c;
1128 XEvent ev;
1129
1130 if(!(c = sel))
1131 return;
1132 restack();
1133 ocx = c->x;
1134 ocy = c->y;
1135 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1136 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1137 return;
1138 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1139 if(usegrab)
1140 XGrabServer(dpy);
1141 do {
1142 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1143 switch(ev.type) {
1144 case ConfigureRequest:
1145 case Expose:
1146 case MapRequest:
1147 handler[ev.type](&ev);
1148 break;
1149 case MotionNotify:
1150 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1151 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1152
1153 if(snap && nw >= wx && nw <= wx + ww
1154 && nh >= wy && nh <= wy + wh) {
1155 if(!c->isfloating && lt[sellt]->arrange
1156 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1157 togglefloating(NULL);
1158 }
1159 if(!lt[sellt]->arrange || c->isfloating)
1160 resize(c, c->x, c->y, nw, nh, True);
1161 break;
1162 }
1163 }
1164 while(ev.type != ButtonRelease);
1165 if(usegrab)
1166 XUngrabServer(dpy);
1167 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1168 XUngrabPointer(dpy, CurrentTime);
1169 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1170}
1171
1172void
1173restack(void) {
1174 Client *c;
1175 XEvent ev;
1176 XWindowChanges wc;
1177
1178 drawbar();
1179 if(!sel)
1180 return;
1181 if(sel->isfloating || !lt[sellt]->arrange)
1182 XRaiseWindow(dpy, sel->win);
1183 if(lt[sellt]->arrange) {
1184 wc.stack_mode = Below;
1185 wc.sibling = barwin;
1186 for(c = stack; c; c = c->snext)
1187 if(!c->isfloating && ISVISIBLE(c)) {
1188 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1189 wc.sibling = c->win;
1190 }
1191 }
1192 XSync(dpy, False);
1193 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1194}
1195
1196void
1197run(void) {
1198 XEvent ev;
1199
1200 /* main event loop */
1201 XSync(dpy, False);
1202 while(running && !XNextEvent(dpy, &ev)) {
1203 if(handler[ev.type])
1204 (handler[ev.type])(&ev); /* call handler */
1205 }
1206}
1207
1208void
1209scan(void) {
1210 unsigned int i, num;
1211 Window d1, d2, *wins = NULL;
1212 XWindowAttributes wa;
1213
1214 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1215 for(i = 0; i < num; i++) {
1216 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1217 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1218 continue;
1219 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1220 manage(wins[i], &wa);
1221 }
1222 for(i = 0; i < num; i++) { /* now the transients */
1223 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1224 continue;
1225 if(XGetTransientForHint(dpy, wins[i], &d1)
1226 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1227 manage(wins[i], &wa);
1228 }
1229 if(wins)
1230 XFree(wins);
1231 }
1232}
1233
1234void
1235setclientstate(Client *c, long state) {
1236 long data[] = {state, None};
1237
1238 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1239 PropModeReplace, (unsigned char *)data, 2);
1240}
1241
1242void
1243setlayout(const Arg *arg) {
1244 if(!arg || !arg->v || arg->v != lt[sellt])
1245 sellt ^= 1;
1246 if(arg && arg->v)
1247 lt[sellt] = (Layout *)arg->v;
1248 if(sel)
1249 arrange();
1250 else
1251 drawbar();
1252}
1253
1254/* arg > 1.0 will set mfact absolutly */
1255void
1256setmfact(const Arg *arg) {
1257 float f;
1258
1259 if(!arg || !lt[sellt]->arrange)
1260 return;
1261 f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1262 if(f < 0.1 || f > 0.9)
1263 return;
1264 mfact = f;
1265 arrange();
1266}
1267
1268void
1269setup(void) {
1270 unsigned int i;
1271 int w;
1272 XSetWindowAttributes wa;
1273
1274 /* init screen */
1275 screen = DefaultScreen(dpy);
1276 root = RootWindow(dpy, screen);
1277 initfont(font);
1278 sx = 0;
1279 sy = 0;
1280 sw = DisplayWidth(dpy, screen);
1281 sh = DisplayHeight(dpy, screen);
1282 bh = dc.h = dc.font.height + 2;
1283 lt[0] = &layouts[0];
1284 lt[1] = &layouts[1 % LENGTH(layouts)];
1285 updategeom();
1286
1287 /* init atoms */
1288 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1289 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1290 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1291 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1292 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1293
1294 /* init cursors */
1295 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1296 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1297 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1298
1299 /* init appearance */
1300 dc.norm[ColBorder] = getcolor(normbordercolor);
1301 dc.norm[ColBG] = getcolor(normbgcolor);
1302 dc.norm[ColFG] = getcolor(normfgcolor);
1303 dc.sel[ColBorder] = getcolor(selbordercolor);
1304 dc.sel[ColBG] = getcolor(selbgcolor);
1305 dc.sel[ColFG] = getcolor(selfgcolor);
1306 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1307 dc.gc = XCreateGC(dpy, root, 0, 0);
1308 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1309 if(!dc.font.set)
1310 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1311
1312 /* init bar */
1313 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1314 w = TEXTW(layouts[i].symbol);
1315 blw = MAX(blw, w);
1316 }
1317
1318 wa.override_redirect = 1;
1319 wa.background_pixmap = ParentRelative;
1320 wa.event_mask = ButtonPressMask|ExposureMask;
1321
1322 barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1323 CopyFromParent, DefaultVisual(dpy, screen),
1324 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1325 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1326 XMapRaised(dpy, barwin);
1327 updatestatus();
1328
1329 /* EWMH support per view */
1330 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1331 PropModeReplace, (unsigned char *) netatom, NetLast);
1332
1333 /* select for events */
1334 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1335 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1336 |PropertyChangeMask;
1337 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1338 XSelectInput(dpy, root, wa.event_mask);
1339
1340 grabkeys();
1341}
1342
1343void
1344showhide(Client *c) {
1345 if(!c)
1346 return;
1347 if(ISVISIBLE(c)) { /* show clients top down */
1348 adjustborder(c, borderpx);
1349 XMoveWindow(dpy, c->win, c->x, c->y);
1350 if(!lt[sellt]->arrange || c->isfloating)
1351 resize(c, c->x, c->y, c->w, c->h, True);
1352 showhide(c->snext);
1353 }
1354 else { /* hide clients bottom up */
1355 showhide(c->snext);
1356 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1357 }
1358}
1359
1360
1361void
1362sigchld(int signal) {
1363 while(0 < waitpid(-1, NULL, WNOHANG));
1364}
1365
1366void
1367spawn(const Arg *arg) {
1368 signal(SIGCHLD, sigchld);
1369 if(fork() == 0) {
1370 if(dpy)
1371 close(ConnectionNumber(dpy));
1372 setsid();
1373 execvp(((char **)arg->v)[0], (char **)arg->v);
1374 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1375 perror(" failed");
1376 exit(0);
1377 }
1378}
1379
1380void
1381tag(const Arg *arg) {
1382 if(sel && arg->ui & TAGMASK) {
1383 sel->tags = arg->ui & TAGMASK;
1384 arrange();
1385 }
1386}
1387
1388int
1389textnw(const char *text, unsigned int len) {
1390 XRectangle r;
1391
1392 if(dc.font.set) {
1393 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1394 return r.width;
1395 }
1396 return XTextWidth(dc.font.xfont, text, len);
1397}
1398
1399void
1400tile(void) {
1401 int x, y, h, w, mw;
1402 unsigned int i, n;
1403 Client *c;
1404
1405 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1406 if(n == 0)
1407 return;
1408
1409 /* master */
1410 c = nexttiled(clients);
1411 mw = mfact * ww;
1412 adjustborder(c, n == 1 ? 0 : borderpx);
1413 resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1414
1415 if(--n == 0)
1416 return;
1417
1418 /* tile stack */
1419 x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1420 y = wy;
1421 w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1422 h = wh / n;
1423 if(h < bh)
1424 h = wh;
1425
1426 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1427 adjustborder(c, borderpx);
1428 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1429 ? wy + wh - y - 2 * c->bw : h - 2 * c->bw), resizehints);
1430 if(h != wh)
1431 y = c->y + HEIGHT(c);
1432 }
1433}
1434
1435void
1436togglebar(const Arg *arg) {
1437 showbar = !showbar;
1438 updategeom();
1439 updatebar();
1440 arrange();
1441}
1442
1443void
1444togglefloating(const Arg *arg) {
1445 if(!sel)
1446 return;
1447 sel->isfloating = !sel->isfloating || sel->isfixed;
1448 if(sel->isfloating)
1449 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1450 arrange();
1451}
1452
1453void
1454toggletag(const Arg *arg) {
1455 unsigned int mask;
1456
1457 if (!sel)
1458 return;
1459
1460 mask = sel->tags ^ (arg->ui & TAGMASK);
1461 if(sel && mask) {
1462 sel->tags = mask;
1463 arrange();
1464 }
1465}
1466
1467void
1468toggleview(const Arg *arg) {
1469 unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1470
1471 if(mask) {
1472 tagset[seltags] = mask;
1473 arrange();
1474 }
1475}
1476
1477void
1478unmanage(Client *c) {
1479 XWindowChanges wc;
1480
1481 wc.border_width = c->oldbw;
1482 /* The server grab construct avoids race conditions. */
1483 XGrabServer(dpy);
1484 XSetErrorHandler(xerrordummy);
1485 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1486 detach(c);
1487 detachstack(c);
1488 if(sel == c)
1489 focus(NULL);
1490 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1491 setclientstate(c, WithdrawnState);
1492 free(c);
1493 XSync(dpy, False);
1494 XSetErrorHandler(xerror);
1495 XUngrabServer(dpy);
1496 arrange();
1497}
1498
1499void
1500unmapnotify(XEvent *e) {
1501 Client *c;
1502 XUnmapEvent *ev = &e->xunmap;
1503
1504 if((c = getclient(ev->window)))
1505 unmanage(c);
1506}
1507
1508void
1509updatebar(void) {
1510 if(dc.drawable != 0)
1511 XFreePixmap(dpy, dc.drawable);
1512 dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1513 XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1514}
1515
1516void
1517updategeom(void) {
1518#ifdef XINERAMA
1519 int n, i = 0;
1520 XineramaScreenInfo *info = NULL;
1521
1522 /* window area geometry */
1523 if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1524 if(n > 1) {
1525 int di, x, y;
1526 unsigned int dui;
1527 Window dummy;
1528 if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1529 for(i = 0; i < n; i++)
1530 if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1531 break;
1532 }
1533 wx = info[i].x_org;
1534 wy = showbar && topbar ? info[i].y_org + bh : info[i].y_org;
1535 ww = info[i].width;
1536 wh = showbar ? info[i].height - bh : info[i].height;
1537 XFree(info);
1538 }
1539 else
1540#endif
1541 {
1542 wx = sx;
1543 wy = showbar && topbar ? sy + bh : sy;
1544 ww = sw;
1545 wh = showbar ? sh - bh : sh;
1546 }
1547
1548 /* bar position */
1549 by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1550}
1551
1552void
1553updatenumlockmask(void) {
1554 unsigned int i, j;
1555 XModifierKeymap *modmap;
1556
1557 numlockmask = 0;
1558 modmap = XGetModifierMapping(dpy);
1559 for(i = 0; i < 8; i++)
1560 for(j = 0; j < modmap->max_keypermod; j++)
1561 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
1562 numlockmask = (1 << i);
1563 XFreeModifiermap(modmap);
1564}
1565
1566void
1567updatesizehints(Client *c) {
1568 long msize;
1569 XSizeHints size;
1570
1571 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1572 /* size is uninitialized, ensure that size.flags aren't used */
1573 size.flags = PSize;
1574 if(size.flags & PBaseSize) {
1575 c->basew = size.base_width;
1576 c->baseh = size.base_height;
1577 }
1578 else if(size.flags & PMinSize) {
1579 c->basew = size.min_width;
1580 c->baseh = size.min_height;
1581 }
1582 else
1583 c->basew = c->baseh = 0;
1584 if(size.flags & PResizeInc) {
1585 c->incw = size.width_inc;
1586 c->inch = size.height_inc;
1587 }
1588 else
1589 c->incw = c->inch = 0;
1590 if(size.flags & PMaxSize) {
1591 c->maxw = size.max_width;
1592 c->maxh = size.max_height;
1593 }
1594 else
1595 c->maxw = c->maxh = 0;
1596 if(size.flags & PMinSize) {
1597 c->minw = size.min_width;
1598 c->minh = size.min_height;
1599 }
1600 else if(size.flags & PBaseSize) {
1601 c->minw = size.base_width;
1602 c->minh = size.base_height;
1603 }
1604 else
1605 c->minw = c->minh = 0;
1606 if(size.flags & PAspect) {
1607 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1608 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1609 }
1610 else
1611 c->maxa = c->mina = 0.0;
1612 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1613 && c->maxw == c->minw && c->maxh == c->minh);
1614}
1615
1616void
1617updatetitle(Client *c) {
1618 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1619 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1620}
1621
1622void
1623updatestatus() {
1624 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1625 strcpy(stext, "dwm-"VERSION);
1626 drawbar();
1627}
1628
1629void
1630updatewmhints(Client *c) {
1631 XWMHints *wmh;
1632
1633 if((wmh = XGetWMHints(dpy, c->win))) {
1634 if(c == sel && wmh->flags & XUrgencyHint) {
1635 wmh->flags &= ~XUrgencyHint;
1636 XSetWMHints(dpy, c->win, wmh);
1637 }
1638 else
1639 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1640
1641 XFree(wmh);
1642 }
1643}
1644
1645void
1646view(const Arg *arg) {
1647 if((arg->ui & TAGMASK) == tagset[seltags])
1648 return;
1649 seltags ^= 1; /* toggle sel tagset */
1650 if(arg->ui & TAGMASK)
1651 tagset[seltags] = arg->ui & TAGMASK;
1652 arrange();
1653}
1654
1655/* There's no way to check accesses to destroyed windows, thus those cases are
1656 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1657 * default error handler, which may call exit. */
1658int
1659xerror(Display *dpy, XErrorEvent *ee) {
1660 if(ee->error_code == BadWindow
1661 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1662 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1663 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1664 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1665 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1666 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1667 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1668 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1669 return 0;
1670 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1671 ee->request_code, ee->error_code);
1672 return xerrorxlib(dpy, ee); /* may call exit */
1673}
1674
1675int
1676xerrordummy(Display *dpy, XErrorEvent *ee) {
1677 return 0;
1678}
1679
1680/* Startup Error handler to check if another window manager
1681 * is already running. */
1682int
1683xerrorstart(Display *dpy, XErrorEvent *ee) {
1684 otherwm = True;
1685 return -1;
1686}
1687
1688void
1689zoom(const Arg *arg) {
1690 Client *c = sel;
1691
1692 if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1693 return;
1694 if(c == nexttiled(clients))
1695 if(!c || !(c = nexttiled(c->next)))
1696 return;
1697 detach(c);
1698 attach(c);
1699 focus(c);
1700 arrange();
1701}
1702
1703int
1704main(int argc, char *argv[]) {
1705 if(argc == 2 && !strcmp("-v", argv[1]))
1706 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1707 else if(argc != 1)
1708 die("usage: dwm [-v]\n");
1709
1710 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1711 fprintf(stderr, "warning: no locale support\n");
1712
1713 if(!(dpy = XOpenDisplay(0)))
1714 die("dwm: cannot open display\n");
1715
1716 checkotherwm();
1717 setup();
1718 scan();
1719 run();
1720 cleanup();
1721
1722 XCloseDisplay(dpy);
1723 return 0;
1724}