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 linked client
15 * list on each monitor, the focus history is remembered through a stack list
16 * on each monitor. 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 /* XINERAMA */
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(C) ((C->tags & C->mon->tagset[C->mon->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 MOUSEMASK (BUTTONMASK|PointerMotionMask)
52#define WIDTH(X) ((X)->w + 2 * (X)->bw)
53#define HEIGHT(X) ((X)->h + 2 * (X)->bw)
54#define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
55#define TEXTW(X) (textnw(X, strlen(X)) + dc.font.height)
56
57/* enums */
58enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
59enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
60enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
61enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
62enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
63 ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
64
65typedef union {
66 int i;
67 unsigned int ui;
68 float f;
69 const void *v;
70} Arg;
71
72typedef struct {
73 unsigned int click;
74 unsigned int mask;
75 unsigned int button;
76 void (*func)(const Arg *arg);
77 const Arg arg;
78} Button;
79
80typedef struct Monitor Monitor;
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 Monitor *mon;
93 Window win;
94};
95
96typedef struct {
97 int x, y, w, h;
98 unsigned long norm[ColLast];
99 unsigned long sel[ColLast];
100 Drawable drawable;
101 GC gc;
102 struct {
103 int ascent;
104 int descent;
105 int height;
106 XFontSet set;
107 XFontStruct *xfont;
108 } font;
109} DC; /* draw context */
110
111typedef struct {
112 unsigned int mod;
113 KeySym keysym;
114 void (*func)(const Arg *);
115 const Arg arg;
116} Key;
117
118typedef struct {
119 const char *symbol;
120 void (*arrange)(Monitor *);
121} Layout;
122
123struct Monitor {
124 int screen_number;
125 float mfact;
126 int by; /* bar geometry */
127 int mx, my, mw, mh; /* screen size */
128 int wx, wy, ww, wh; /* window area */
129 unsigned int seltags;
130 unsigned int sellt;
131 unsigned int tagset[2];
132 Bool showbar;
133 Bool topbar;
134 Client *clients;
135 Client *sel;
136 Client *stack;
137 Monitor *next;
138 Window barwin;
139 const Layout *lt[2];
140};
141
142typedef struct {
143 const char *class;
144 const char *instance;
145 const char *title;
146 unsigned int tags;
147 Bool isfloating;
148} Rule;
149
150/* function declarations */
151static void applyrules(Client *c);
152static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
153static void arrange(void);
154static void attach(Client *c);
155static void attachstack(Client *c);
156static void buttonpress(XEvent *e);
157static void checkotherwm(void);
158static void cleanup(void);
159static void cleanupmons(void);
160static void clearurgent(Client *c);
161static void configure(Client *c);
162static void configurenotify(XEvent *e);
163static void configurerequest(XEvent *e);
164static void destroynotify(XEvent *e);
165static void detach(Client *c);
166static void detachstack(Client *c);
167static void die(const char *errstr, ...);
168static Monitor *dirtomon(int dir);
169static void drawbar(Monitor *m);
170static void drawbars(void);
171static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
172static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
173static void enternotify(XEvent *e);
174static void expose(XEvent *e);
175static void focus(Client *c);
176static void focusin(XEvent *e);
177static void focusmon(const Arg *arg);
178static void focusstack(const Arg *arg);
179static unsigned long getcolor(const char *colstr);
180static Bool getrootptr(int *x, int *y);
181static long getstate(Window w);
182static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
183static void grabbuttons(Client *c, Bool focused);
184static void grabkeys(void);
185static void initfont(const char *fontstr);
186static Bool isprotodel(Client *c);
187static void keypress(XEvent *e);
188static void killclient(const Arg *arg);
189static void manage(Window w, XWindowAttributes *wa);
190static void mappingnotify(XEvent *e);
191static void maprequest(XEvent *e);
192static void monocle(Monitor *m);
193static void movemouse(const Arg *arg);
194static Client *nexttiled(Client *c);
195static Monitor *ptrtomon(int x, int y);
196static void propertynotify(XEvent *e);
197static void quit(const Arg *arg);
198static void resize(Client *c, int x, int y, int w, int h, Bool interact);
199static void resizemouse(const Arg *arg);
200static void restack(Monitor *m);
201static void run(void);
202static void scan(void);
203static void sendmon(Client *c, Monitor *m);
204static void setclientstate(Client *c, long state);
205static void setlayout(const Arg *arg);
206static void setmfact(const Arg *arg);
207static void setup(void);
208static void showhide(Client *c);
209static void sigchld(int signal);
210static void spawn(const Arg *arg);
211static void tag(const Arg *arg);
212static void tagmon(const Arg *arg);
213static int textnw(const char *text, unsigned int len);
214static void tile(Monitor *);
215static void togglebar(const Arg *arg);
216static void togglefloating(const Arg *arg);
217static void toggletag(const Arg *arg);
218static void toggleview(const Arg *arg);
219static void unfocus(Client *c);
220static void unmanage(Client *c);
221static void unmapnotify(XEvent *e);
222static void updategeom(void);
223static void updatebarpos(Monitor *m);
224static void updatebars(void);
225static void updatenumlockmask(void);
226static void updatesizehints(Client *c);
227static void updatestatus(void);
228static void updatetitle(Client *c);
229static void updatewmhints(Client *c);
230static void view(const Arg *arg);
231static Client *wintoclient(Window w);
232static Monitor *wintomon(Window w);
233static int xerror(Display *dpy, XErrorEvent *ee);
234static int xerrordummy(Display *dpy, XErrorEvent *ee);
235static int xerrorstart(Display *dpy, XErrorEvent *ee);
236static void zoom(const Arg *arg);
237
238/* variables */
239static char stext[256];
240static int screen;
241static int sw, sh; /* X display screen geometry x, y, width, height */
242static int bh, blw = 0; /* bar geometry */
243static int (*xerrorxlib)(Display *, XErrorEvent *);
244static unsigned int numlockmask = 0;
245static void (*handler[LASTEvent]) (XEvent *) = {
246 [ButtonPress] = buttonpress,
247 [ConfigureRequest] = configurerequest,
248 [ConfigureNotify] = configurenotify,
249 [DestroyNotify] = destroynotify,
250 [EnterNotify] = enternotify,
251 [Expose] = expose,
252 [FocusIn] = focusin,
253 [KeyPress] = keypress,
254 [MappingNotify] = mappingnotify,
255 [MapRequest] = maprequest,
256 [PropertyNotify] = propertynotify,
257 [UnmapNotify] = unmapnotify
258};
259static Atom wmatom[WMLast], netatom[NetLast];
260static Bool otherwm;
261static Bool running = True;
262static Cursor cursor[CurLast];
263static Display *dpy;
264static DC dc;
265static Monitor *mons = NULL, *selmon = NULL;
266static Window root;
267
268/* configuration, allows nested code to access above variables */
269#include "config.h"
270
271/* compile-time check if all tags fit into an unsigned int bit array. */
272struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
273
274/* function implementations */
275void
276applyrules(Client *c) {
277 unsigned int i;
278 const Rule *r;
279 XClassHint ch = { 0 };
280
281 /* rule matching */
282 c->isfloating = c->tags = 0;
283 if(XGetClassHint(dpy, c->win, &ch)) {
284 for(i = 0; i < LENGTH(rules); i++) {
285 r = &rules[i];
286 if((!r->title || strstr(c->name, r->title))
287 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
288 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance))))
289 {
290 c->isfloating = r->isfloating;
291 c->tags |= r->tags;
292 }
293 }
294 if(ch.res_class)
295 XFree(ch.res_class);
296 if(ch.res_name)
297 XFree(ch.res_name);
298 }
299 c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
300}
301
302Bool
303applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
304 Bool baseismin;
305 Monitor *m = c->mon;
306
307 /* set minimum possible */
308 *w = MAX(1, *w);
309 *h = MAX(1, *h);
310 if(interact) {
311 if(*x > sw)
312 *x = sw - WIDTH(c);
313 if(*y > sh)
314 *y = sh - HEIGHT(c);
315 if(*x + *w + 2 * c->bw < 0)
316 *x = 0;
317 if(*y + *h + 2 * c->bw < 0)
318 *y = 0;
319 }
320 else {
321 if(*x > m->mx + m->mw)
322 *x = m->mx + m->mw - WIDTH(c);
323 if(*y > m->my + m->mh)
324 *y = m->my + m->mh - HEIGHT(c);
325 if(*x + *w + 2 * c->bw < m->mx)
326 *x = m->mx;
327 if(*y + *h + 2 * c->bw < m->my)
328 *y = m->my;
329 }
330 if(*h < bh)
331 *h = bh;
332 if(*w < bh)
333 *w = bh;
334 if(resizehints || c->isfloating) {
335 /* see last two sentences in ICCCM 4.1.2.3 */
336 baseismin = c->basew == c->minw && c->baseh == c->minh;
337 if(!baseismin) { /* temporarily remove base dimensions */
338 *w -= c->basew;
339 *h -= c->baseh;
340 }
341 /* adjust for aspect limits */
342 if(c->mina > 0 && c->maxa > 0) {
343 if(c->maxa < (float)*w / *h)
344 *w = *h * c->maxa;
345 else if(c->mina < (float)*h / *w)
346 *h = *w * c->mina;
347 }
348 if(baseismin) { /* increment calculation requires this */
349 *w -= c->basew;
350 *h -= c->baseh;
351 }
352 /* adjust for increment value */
353 if(c->incw)
354 *w -= *w % c->incw;
355 if(c->inch)
356 *h -= *h % c->inch;
357 /* restore base dimensions */
358 *w += c->basew;
359 *h += c->baseh;
360 *w = MAX(*w, c->minw);
361 *h = MAX(*h, c->minh);
362 if(c->maxw)
363 *w = MIN(*w, c->maxw);
364 if(c->maxh)
365 *h = MIN(*h, c->maxh);
366 }
367 return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
368}
369
370void
371arrange(void) {
372 Monitor *m;
373
374 /* optimise two loops into one, check focus(NULL) */
375 for(m = mons; m; m = m->next)
376 showhide(m->stack);
377 focus(NULL);
378 for(m = mons; m; m = m->next) {
379 if(m->lt[m->sellt]->arrange)
380 m->lt[m->sellt]->arrange(m);
381 restack(m);
382 }
383}
384
385void
386attach(Client *c) {
387 c->next = c->mon->clients;
388 c->mon->clients = c;
389}
390
391void
392attachstack(Client *c) {
393 c->snext = c->mon->stack;
394 c->mon->stack = c;
395}
396
397void
398buttonpress(XEvent *e) {
399 unsigned int i, x, click;
400 Arg arg = {0};
401 Client *c;
402 Monitor *m;
403 XButtonPressedEvent *ev = &e->xbutton;
404
405 click = ClkRootWin;
406 /* focus monitor if necessary */
407 if((m = wintomon(ev->window)) && m != selmon) {
408 unfocus(selmon->sel);
409 selmon = m;
410 focus(NULL);
411 }
412 if(ev->window == selmon->barwin) {
413 i = x = 0;
414 do
415 x += TEXTW(tags[i]);
416 while(ev->x >= x && ++i < LENGTH(tags));
417 if(i < LENGTH(tags)) {
418 click = ClkTagBar;
419 arg.ui = 1 << i;
420 }
421 else if(ev->x < x + blw)
422 click = ClkLtSymbol;
423 else if(ev->x > selmon->wx + selmon->ww - TEXTW(stext))
424 click = ClkStatusText;
425 else
426 click = ClkWinTitle;
427 }
428 else if((c = wintoclient(ev->window))) {
429 focus(c);
430 click = ClkClientWin;
431 }
432 for(i = 0; i < LENGTH(buttons); i++)
433 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
434 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
435 buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
436}
437
438void
439checkotherwm(void) {
440 otherwm = False;
441 xerrorxlib = XSetErrorHandler(xerrorstart);
442 /* this causes an error if some other window manager is running */
443 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
444 XSync(dpy, False);
445 if(otherwm)
446 die("dwm: another window manager is already running\n");
447 XSetErrorHandler(xerror);
448 XSync(dpy, False);
449}
450
451void
452cleanup(void) {
453 Arg a = {.ui = ~0};
454 Layout foo = { "", NULL };
455 Monitor *m;
456
457 view(&a);
458 selmon->lt[selmon->sellt] = &foo;
459 for(m = mons; m; m = m->next)
460 while(m->stack)
461 unmanage(m->stack);
462 if(dc.font.set)
463 XFreeFontSet(dpy, dc.font.set);
464 else
465 XFreeFont(dpy, dc.font.xfont);
466 XUngrabKey(dpy, AnyKey, AnyModifier, root);
467 XFreePixmap(dpy, dc.drawable);
468 XFreeGC(dpy, dc.gc);
469 XFreeCursor(dpy, cursor[CurNormal]);
470 XFreeCursor(dpy, cursor[CurResize]);
471 XFreeCursor(dpy, cursor[CurMove]);
472 cleanupmons();
473 XSync(dpy, False);
474 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
475}
476
477void
478cleanupmons(void) {
479 Monitor *m;
480
481 while(mons) {
482 m = mons->next;
483 XUnmapWindow(dpy, mons->barwin);
484 XDestroyWindow(dpy, mons->barwin);
485 free(mons);
486 mons = m;
487 }
488}
489
490void
491clearurgent(Client *c) {
492 XWMHints *wmh;
493
494 c->isurgent = False;
495 if(!(wmh = XGetWMHints(dpy, c->win)))
496 return;
497 wmh->flags &= ~XUrgencyHint;
498 XSetWMHints(dpy, c->win, wmh);
499 XFree(wmh);
500}
501
502void
503configure(Client *c) {
504 XConfigureEvent ce;
505
506 ce.type = ConfigureNotify;
507 ce.display = dpy;
508 ce.event = c->win;
509 ce.window = c->win;
510 ce.x = c->x;
511 ce.y = c->y;
512 ce.width = c->w;
513 ce.height = c->h;
514 ce.border_width = c->bw;
515 ce.above = None;
516 ce.override_redirect = False;
517 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
518}
519
520void
521configurenotify(XEvent *e) {
522 Monitor *m;
523 XConfigureEvent *ev = &e->xconfigure;
524
525 if(ev->window == root && (ev->width != sw || ev->height != sh)) {
526 sw = ev->width;
527 sh = ev->height;
528 updategeom();
529 if(dc.drawable != 0)
530 XFreePixmap(dpy, dc.drawable);
531 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
532 updatebars();
533 for(m = mons; m; m = m->next)
534 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
535 arrange();
536 }
537}
538
539void
540configurerequest(XEvent *e) {
541 Client *c;
542 Monitor *m;
543 XConfigureRequestEvent *ev = &e->xconfigurerequest;
544 XWindowChanges wc;
545
546 if((c = wintoclient(ev->window))) {
547 if(ev->value_mask & CWBorderWidth)
548 c->bw = ev->border_width;
549 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
550 m = c->mon;
551 if(ev->value_mask & CWX)
552 c->x = m->mx + ev->x;
553 if(ev->value_mask & CWY)
554 c->y = m->my + ev->y;
555 if(ev->value_mask & CWWidth)
556 c->w = ev->width;
557 if(ev->value_mask & CWHeight)
558 c->h = ev->height;
559 if((c->x - m->mx + c->w) > m->mw && c->isfloating)
560 c->x = m->mx + (m->mw / 2 - c->w / 2); /* center in x direction */
561 if((c->y - m->my + c->h) > m->mh && c->isfloating)
562 c->y = m->my + (m->mh / 2 - c->h / 2); /* center in y direction */
563 if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
564 configure(c);
565 if(ISVISIBLE(c))
566 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
567 }
568 else
569 configure(c);
570 }
571 else {
572 wc.x = ev->x;
573 wc.y = ev->y;
574 wc.width = ev->width;
575 wc.height = ev->height;
576 wc.border_width = ev->border_width;
577 wc.sibling = ev->above;
578 wc.stack_mode = ev->detail;
579 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
580 }
581 XSync(dpy, False);
582}
583
584void
585destroynotify(XEvent *e) {
586 Client *c;
587 XDestroyWindowEvent *ev = &e->xdestroywindow;
588
589 if((c = wintoclient(ev->window)))
590 unmanage(c);
591}
592
593void
594detach(Client *c) {
595 Client **tc;
596
597 for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
598 *tc = c->next;
599}
600
601void
602detachstack(Client *c) {
603 Client **tc, *t;
604
605 for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
606 *tc = c->snext;
607
608 if(c == c->mon->sel) {
609 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
610 c->mon->sel = t;
611 }
612}
613
614void
615die(const char *errstr, ...) {
616 va_list ap;
617
618 va_start(ap, errstr);
619 vfprintf(stderr, errstr, ap);
620 va_end(ap);
621 exit(EXIT_FAILURE);
622}
623
624Monitor *
625dirtomon(int dir) {
626 Monitor *m = NULL;
627
628 if(dir > 0) {
629 if(!(m = selmon->next))
630 m = mons;
631 }
632 else {
633 if(selmon == mons)
634 for(m = mons; m->next; m = m->next);
635 else
636 for(m = mons; m->next != selmon; m = m->next);
637 }
638 return m;
639}
640
641void
642drawbar(Monitor *m) {
643 int x;
644 unsigned int i, occ = 0, urg = 0;
645 unsigned long *col;
646 Client *c;
647
648 for(c = m->clients; c; c = c->next) {
649 occ |= c->tags;
650 if(c->isurgent)
651 urg |= c->tags;
652 }
653 dc.x = 0;
654 for(i = 0; i < LENGTH(tags); i++) {
655 dc.w = TEXTW(tags[i]);
656 col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
657 drawtext(tags[i], col, urg & 1 << i);
658 drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
659 occ & 1 << i, urg & 1 << i, col);
660 dc.x += dc.w;
661 }
662 if(blw > 0) {
663 dc.w = blw;
664 drawtext(m->lt[m->sellt]->symbol, dc.norm, False);
665 x = dc.x + dc.w;
666 }
667 else
668 x = dc.x;
669 if(m == selmon) { /* status is only drawn on selected monitor */
670 dc.w = TEXTW(stext);
671 dc.x = m->ww - dc.w;
672 if(dc.x < x) {
673 dc.x = x;
674 dc.w = m->ww - x;
675 }
676 drawtext(stext, dc.norm, False);
677 }
678 else
679 dc.x = m->ww;
680 if((dc.w = dc.x - x) > bh) {
681 dc.x = x;
682 if(m->sel) {
683 col = m == selmon ? dc.sel : dc.norm;
684 drawtext(m->sel->name, col, False);
685 drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
686 }
687 else
688 drawtext(NULL, dc.norm, False);
689 }
690 XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
691 XSync(dpy, False);
692}
693
694void
695drawbars(void) {
696 Monitor *m;
697
698 for(m = mons; m; m = m->next)
699 drawbar(m);
700}
701
702void
703drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
704 int x;
705 XGCValues gcv;
706 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
707
708 gcv.foreground = col[invert ? ColBG : ColFG];
709 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
710 x = (dc.font.ascent + dc.font.descent + 2) / 4;
711 r.x = dc.x + 1;
712 r.y = dc.y + 1;
713 if(filled) {
714 r.width = r.height = x + 1;
715 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
716 }
717 else if(empty) {
718 r.width = r.height = x;
719 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
720 }
721}
722
723void
724drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
725 char buf[256];
726 int i, x, y, h, len, olen;
727 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
728
729 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
730 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
731 if(!text)
732 return;
733 olen = strlen(text);
734 h = dc.font.ascent + dc.font.descent;
735 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
736 x = dc.x + (h / 2);
737 /* shorten text if necessary */
738 for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
739 if(!len)
740 return;
741 memcpy(buf, text, len);
742 if(len < olen)
743 for(i = len; i && i > len - 3; buf[--i] = '.');
744 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
745 if(dc.font.set)
746 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
747 else
748 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
749}
750
751void
752enternotify(XEvent *e) {
753 Client *c;
754 Monitor *m;
755 XCrossingEvent *ev = &e->xcrossing;
756
757 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
758 return;
759 if((m = wintomon(ev->window)) && m != selmon) {
760 unfocus(selmon->sel);
761 selmon = m;
762 }
763 if((c = wintoclient(ev->window)))
764 focus(c);
765 else
766 focus(NULL);
767}
768
769void
770expose(XEvent *e) {
771 Monitor *m;
772 XExposeEvent *ev = &e->xexpose;
773
774 if(ev->count == 0 && (m = wintomon(ev->window)))
775 drawbar(m);
776}
777
778void
779focus(Client *c) {
780 if(!c || !ISVISIBLE(c))
781 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
782 if(selmon->sel)
783 unfocus(selmon->sel);
784 if(c) {
785 if(c->mon != selmon)
786 selmon = c->mon;
787 if(c->isurgent)
788 clearurgent(c);
789 detachstack(c);
790 attachstack(c);
791 grabbuttons(c, True);
792 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
793 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
794 }
795 else
796 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
797 selmon->sel = c;
798 drawbars();
799}
800
801void
802focusin(XEvent *e) { /* there are some broken focus acquiring clients */
803 XFocusChangeEvent *ev = &e->xfocus;
804
805 if(selmon->sel && ev->window != selmon->sel->win)
806 XSetInputFocus(dpy, selmon->sel->win, RevertToPointerRoot, CurrentTime);
807}
808
809void
810focusmon(const Arg *arg) {
811 Monitor *m = NULL;
812
813 if(!mons->next)
814 return;
815 m = dirtomon(arg->i);
816 unfocus(selmon->sel);
817 selmon = m;
818 focus(NULL);
819}
820
821void
822focusstack(const Arg *arg) {
823 Client *c = NULL, *i;
824
825 if(!selmon->sel)
826 return;
827 if(arg->i > 0) {
828 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
829 if(!c)
830 for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
831 }
832 else {
833 for(i = selmon->clients; i != selmon->sel; i = i->next)
834 if(ISVISIBLE(i))
835 c = i;
836 if(!c)
837 for(; i; i = i->next)
838 if(ISVISIBLE(i))
839 c = i;
840 }
841 if(c) {
842 focus(c);
843 restack(selmon);
844 }
845}
846
847unsigned long
848getcolor(const char *colstr) {
849 Colormap cmap = DefaultColormap(dpy, screen);
850 XColor color;
851
852 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
853 die("error, cannot allocate color '%s'\n", colstr);
854 return color.pixel;
855}
856
857Bool
858getrootptr(int *x, int *y) {
859 int di;
860 unsigned int dui;
861 Window dummy;
862
863 return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
864}
865
866long
867getstate(Window w) {
868 int format, status;
869 long result = -1;
870 unsigned char *p = NULL;
871 unsigned long n, extra;
872 Atom real;
873
874 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
875 &real, &format, &n, &extra, (unsigned char **)&p);
876 if(status != Success)
877 return -1;
878 if(n != 0)
879 result = *p;
880 XFree(p);
881 return result;
882}
883
884Bool
885gettextprop(Window w, Atom atom, char *text, unsigned int size) {
886 char **list = NULL;
887 int n;
888 XTextProperty name;
889
890 if(!text || size == 0)
891 return False;
892 text[0] = '\0';
893 XGetTextProperty(dpy, w, &name, atom);
894 if(!name.nitems)
895 return False;
896 if(name.encoding == XA_STRING)
897 strncpy(text, (char *)name.value, size - 1);
898 else {
899 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
900 && n > 0 && *list)
901 {
902 strncpy(text, *list, size - 1);
903 XFreeStringList(list);
904 }
905 }
906 text[size - 1] = '\0';
907 XFree(name.value);
908 return True;
909}
910
911void
912grabbuttons(Client *c, Bool focused) {
913 updatenumlockmask();
914 {
915 unsigned int i, j;
916 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
917 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
918 if(focused) {
919 for(i = 0; i < LENGTH(buttons); i++)
920 if(buttons[i].click == ClkClientWin)
921 for(j = 0; j < LENGTH(modifiers); j++)
922 XGrabButton(dpy, buttons[i].button,
923 buttons[i].mask | modifiers[j],
924 c->win, False, BUTTONMASK,
925 GrabModeAsync, GrabModeSync, None, None);
926 }
927 else
928 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
929 BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
930 }
931}
932
933void
934grabkeys(void) {
935 updatenumlockmask();
936 {
937 unsigned int i, j;
938 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
939 KeyCode code;
940
941 XUngrabKey(dpy, AnyKey, AnyModifier, root);
942 for(i = 0; i < LENGTH(keys); i++) {
943 if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
944 for(j = 0; j < LENGTH(modifiers); j++)
945 XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
946 True, GrabModeAsync, GrabModeAsync);
947 }
948 }
949}
950
951void
952initfont(const char *fontstr) {
953 char *def, **missing;
954 int i, n;
955
956 missing = NULL;
957 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
958 if(missing) {
959 while(n--)
960 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
961 XFreeStringList(missing);
962 }
963 if(dc.font.set) {
964 XFontSetExtents *font_extents;
965 XFontStruct **xfonts;
966 char **font_names;
967 dc.font.ascent = dc.font.descent = 0;
968 font_extents = XExtentsOfFontSet(dc.font.set);
969 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
970 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
971 dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
972 dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
973 xfonts++;
974 }
975 }
976 else {
977 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
978 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
979 die("error, cannot load font: '%s'\n", fontstr);
980 dc.font.ascent = dc.font.xfont->ascent;
981 dc.font.descent = dc.font.xfont->descent;
982 }
983 dc.font.height = dc.font.ascent + dc.font.descent;
984}
985
986Bool
987isprotodel(Client *c) {
988 int i, n;
989 Atom *protocols;
990 Bool ret = False;
991
992 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
993 for(i = 0; !ret && i < n; i++)
994 if(protocols[i] == wmatom[WMDelete])
995 ret = True;
996 XFree(protocols);
997 }
998 return ret;
999}
1000
1001void
1002keypress(XEvent *e) {
1003 unsigned int i;
1004 KeySym keysym;
1005 XKeyEvent *ev;
1006
1007 ev = &e->xkey;
1008 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1009 for(i = 0; i < LENGTH(keys); i++)
1010 if(keysym == keys[i].keysym
1011 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1012 && keys[i].func)
1013 keys[i].func(&(keys[i].arg));
1014}
1015
1016void
1017killclient(const Arg *arg) {
1018 XEvent ev;
1019
1020 if(!selmon->sel)
1021 return;
1022 if(isprotodel(selmon->sel)) {
1023 ev.type = ClientMessage;
1024 ev.xclient.window = selmon->sel->win;
1025 ev.xclient.message_type = wmatom[WMProtocols];
1026 ev.xclient.format = 32;
1027 ev.xclient.data.l[0] = wmatom[WMDelete];
1028 ev.xclient.data.l[1] = CurrentTime;
1029 XSendEvent(dpy, selmon->sel->win, False, NoEventMask, &ev);
1030 }
1031 else
1032 XKillClient(dpy, selmon->sel->win);
1033}
1034
1035void
1036manage(Window w, XWindowAttributes *wa) {
1037 static Client cz;
1038 Client *c, *t = NULL;
1039 Window trans = None;
1040 XWindowChanges wc;
1041
1042 if(!(c = malloc(sizeof(Client))))
1043 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1044 *c = cz;
1045 c->win = w;
1046 if(XGetTransientForHint(dpy, w, &trans))
1047 t = wintoclient(trans);
1048 if(t) {
1049 c->mon = t->mon;
1050 c->tags = t->tags;
1051 }
1052 else {
1053 c->mon = selmon;
1054 applyrules(c);
1055 }
1056 /* geometry */
1057 c->x = wa->x + c->mon->wx;
1058 c->y = wa->y + c->mon->wy;
1059 c->w = wa->width;
1060 c->h = wa->height;
1061 c->oldbw = wa->border_width;
1062 if(c->w == c->mon->mw && c->h == c->mon->mh) {
1063 c->x = c->mon->mx;
1064 c->y = c->mon->my;
1065 c->bw = 0;
1066 }
1067 else {
1068 if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1069 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1070 if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1071 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1072 c->x = MAX(c->x, c->mon->mx);
1073 /* only fix client y-offset, if the client center might cover the bar */
1074 c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= c->mon->wx)
1075 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1076 c->bw = borderpx;
1077 }
1078 wc.border_width = c->bw;
1079 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1080 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1081 configure(c); /* propagates border_width, if size doesn't change */
1082 updatesizehints(c);
1083 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1084 grabbuttons(c, False);
1085 updatetitle(c);
1086 if(!c->isfloating)
1087 c->isfloating = trans != None || c->isfixed;
1088 if(c->isfloating)
1089 XRaiseWindow(dpy, c->win);
1090 attach(c);
1091 attachstack(c);
1092 XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1093 XMapWindow(dpy, c->win);
1094 setclientstate(c, NormalState);
1095 arrange();
1096}
1097
1098void
1099mappingnotify(XEvent *e) {
1100 XMappingEvent *ev = &e->xmapping;
1101
1102 XRefreshKeyboardMapping(ev);
1103 if(ev->request == MappingKeyboard)
1104 grabkeys();
1105}
1106
1107void
1108maprequest(XEvent *e) {
1109 static XWindowAttributes wa;
1110 XMapRequestEvent *ev = &e->xmaprequest;
1111
1112 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1113 return;
1114 if(wa.override_redirect)
1115 return;
1116 if(!wintoclient(ev->window))
1117 manage(ev->window, &wa);
1118}
1119
1120void
1121monocle(Monitor *m) {
1122 Client *c;
1123
1124 for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1125 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False);
1126}
1127
1128void
1129movemouse(const Arg *arg) {
1130 int x, y, ocx, ocy, nx, ny;
1131 Client *c;
1132 Monitor *m;
1133 XEvent ev;
1134
1135 if(!(c = selmon->sel))
1136 return;
1137 restack(selmon);
1138 ocx = c->x;
1139 ocy = c->y;
1140 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1141 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1142 return;
1143 if(!getrootptr(&x, &y))
1144 return;
1145 do {
1146 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1147 switch (ev.type) {
1148 case ConfigureRequest:
1149 case Expose:
1150 case MapRequest:
1151 handler[ev.type](&ev);
1152 break;
1153 case MotionNotify:
1154 nx = ocx + (ev.xmotion.x - x);
1155 ny = ocy + (ev.xmotion.y - y);
1156 if(snap && nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1157 && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1158 if(abs(selmon->wx - nx) < snap)
1159 nx = selmon->wx;
1160 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1161 nx = selmon->wx + selmon->ww - WIDTH(c);
1162 if(abs(selmon->wy - ny) < snap)
1163 ny = selmon->wy;
1164 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1165 ny = selmon->wy + selmon->wh - HEIGHT(c);
1166 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1167 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1168 togglefloating(NULL);
1169 }
1170 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1171 resize(c, nx, ny, c->w, c->h, True);
1172 break;
1173 }
1174 }
1175 while(ev.type != ButtonRelease);
1176 XUngrabPointer(dpy, CurrentTime);
1177 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1178 sendmon(c, m);
1179 selmon = m;
1180 focus(NULL);
1181 }
1182}
1183
1184Client *
1185nexttiled(Client *c) {
1186 for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1187 return c;
1188}
1189
1190Monitor *
1191ptrtomon(int x, int y) {
1192 Monitor *m;
1193
1194 for(m = mons; m; m = m->next)
1195 if(INRECT(x, y, m->wx, m->wy, m->ww, m->wh))
1196 return m;
1197 return selmon;
1198}
1199
1200void
1201propertynotify(XEvent *e) {
1202 Client *c;
1203 Window trans;
1204 XPropertyEvent *ev = &e->xproperty;
1205
1206 if((ev->window == root) && (ev->atom == XA_WM_NAME))
1207 updatestatus();
1208 else if(ev->state == PropertyDelete)
1209 return; /* ignore */
1210 else if((c = wintoclient(ev->window))) {
1211 switch (ev->atom) {
1212 default: break;
1213 case XA_WM_TRANSIENT_FOR:
1214 XGetTransientForHint(dpy, c->win, &trans);
1215 if(!c->isfloating && (c->isfloating = (wintoclient(trans) != NULL)))
1216 arrange();
1217 break;
1218 case XA_WM_NORMAL_HINTS:
1219 updatesizehints(c);
1220 break;
1221 case XA_WM_HINTS:
1222 updatewmhints(c);
1223 drawbars();
1224 break;
1225 }
1226 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1227 updatetitle(c);
1228 if(c == selmon->sel)
1229 drawbars();
1230 }
1231 }
1232}
1233
1234void
1235quit(const Arg *arg) {
1236 running = False;
1237}
1238
1239void
1240resize(Client *c, int x, int y, int w, int h, Bool interact) {
1241 XWindowChanges wc;
1242
1243 if(applysizehints(c, &x, &y, &w, &h, interact)) {
1244 c->x = wc.x = x;
1245 c->y = wc.y = y;
1246 c->w = wc.width = w;
1247 c->h = wc.height = h;
1248 wc.border_width = c->bw;
1249 XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1250 configure(c);
1251 XSync(dpy, False);
1252 }
1253}
1254
1255void
1256resizemouse(const Arg *arg) {
1257 int ocx, ocy;
1258 int nw, nh;
1259 Client *c;
1260 Monitor *m;
1261 XEvent ev;
1262
1263 if(!(c = selmon->sel))
1264 return;
1265 restack(selmon);
1266 ocx = c->x;
1267 ocy = c->y;
1268 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1269 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1270 return;
1271 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1272 do {
1273 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1274 switch(ev.type) {
1275 case ConfigureRequest:
1276 case Expose:
1277 case MapRequest:
1278 handler[ev.type](&ev);
1279 break;
1280 case MotionNotify:
1281 nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1282 nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1283 if(snap && nw >= selmon->wx && nw <= selmon->wx + selmon->ww
1284 && nh >= selmon->wy && nh <= selmon->wy + selmon->wh) {
1285 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1286 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1287 togglefloating(NULL);
1288 }
1289 if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1290 resize(c, c->x, c->y, nw, nh, True);
1291 break;
1292 }
1293 }
1294 while(ev.type != ButtonRelease);
1295 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1296 XUngrabPointer(dpy, CurrentTime);
1297 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1298 if((m = ptrtomon(c->x + c->w / 2, c->y + c->h / 2)) != selmon) {
1299 sendmon(c, m);
1300 selmon = m;
1301 focus(NULL);
1302 }
1303}
1304
1305void
1306restack(Monitor *m) {
1307 Client *c;
1308 XEvent ev;
1309 XWindowChanges wc;
1310
1311 drawbars();
1312 if(!m->sel)
1313 return;
1314 if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1315 XRaiseWindow(dpy, m->sel->win);
1316 if(m->lt[m->sellt]->arrange) {
1317 wc.stack_mode = Below;
1318 wc.sibling = m->barwin;
1319 for(c = m->stack; c; c = c->snext)
1320 if(!c->isfloating && ISVISIBLE(c)) {
1321 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1322 wc.sibling = c->win;
1323 }
1324 }
1325 XSync(dpy, False);
1326 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1327}
1328
1329void
1330run(void) {
1331 XEvent ev;
1332
1333 /* main event loop */
1334 XSync(dpy, False);
1335 while(running && !XNextEvent(dpy, &ev))
1336 if(handler[ev.type])
1337 (handler[ev.type])(&ev); /* call handler */
1338}
1339
1340void
1341scan(void) {
1342 unsigned int i, num;
1343 Window d1, d2, *wins = NULL;
1344 XWindowAttributes wa;
1345
1346 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1347 for(i = 0; i < num; i++) {
1348 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1349 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1350 continue;
1351 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1352 manage(wins[i], &wa);
1353 }
1354 for(i = 0; i < num; i++) { /* now the transients */
1355 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1356 continue;
1357 if(XGetTransientForHint(dpy, wins[i], &d1)
1358 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1359 manage(wins[i], &wa);
1360 }
1361 if(wins)
1362 XFree(wins);
1363 }
1364}
1365
1366void
1367sendmon(Client *c, Monitor *m) {
1368 if(c->mon == m)
1369 return;
1370 unfocus(c);
1371 detach(c);
1372 detachstack(c);
1373 c->mon = m;
1374 c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1375 attach(c);
1376 attachstack(c);
1377 focus(NULL);
1378 arrange();
1379}
1380
1381void
1382setclientstate(Client *c, long state) {
1383 long data[] = { state, None };
1384
1385 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1386 PropModeReplace, (unsigned char *)data, 2);
1387}
1388
1389void
1390setlayout(const Arg *arg) {
1391 if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1392 selmon->sellt ^= 1;
1393 if(arg && arg->v)
1394 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1395 if(selmon->sel)
1396 arrange();
1397 else
1398 drawbars();
1399}
1400
1401/* arg > 1.0 will set mfact absolutly */
1402void
1403setmfact(const Arg *arg) {
1404 float f;
1405
1406 if(!arg || !selmon->lt[selmon->sellt]->arrange)
1407 return;
1408 f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1409 if(f < 0.1 || f > 0.9)
1410 return;
1411 selmon->mfact = f;
1412 arrange();
1413}
1414
1415void
1416setup(void) {
1417 unsigned int i;
1418 int w;
1419 XSetWindowAttributes wa;
1420
1421 /* init screen */
1422 screen = DefaultScreen(dpy);
1423 root = RootWindow(dpy, screen);
1424 initfont(font);
1425 sw = DisplayWidth(dpy, screen);
1426 sh = DisplayHeight(dpy, screen);
1427 bh = dc.h = dc.font.height + 2;
1428 updategeom();
1429 /* init atoms */
1430 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1431 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1432 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1433 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1434 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1435 /* init cursors */
1436 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1437 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1438 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1439 /* init appearance */
1440 dc.norm[ColBorder] = getcolor(normbordercolor);
1441 dc.norm[ColBG] = getcolor(normbgcolor);
1442 dc.norm[ColFG] = getcolor(normfgcolor);
1443 dc.sel[ColBorder] = getcolor(selbordercolor);
1444 dc.sel[ColBG] = getcolor(selbgcolor);
1445 dc.sel[ColFG] = getcolor(selfgcolor);
1446 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1447 dc.gc = XCreateGC(dpy, root, 0, NULL);
1448 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1449 if(!dc.font.set)
1450 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1451 /* init bars */
1452 for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1453 w = TEXTW(layouts[i].symbol);
1454 blw = MAX(blw, w);
1455 }
1456 updatebars();
1457 updatestatus();
1458 /* EWMH support per view */
1459 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1460 PropModeReplace, (unsigned char *) netatom, NetLast);
1461 /* select for events */
1462 wa.cursor = cursor[CurNormal];
1463 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1464 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
1465 |PropertyChangeMask;
1466 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1467 XSelectInput(dpy, root, wa.event_mask);
1468 grabkeys();
1469}
1470
1471void
1472showhide(Client *c) {
1473 if(!c)
1474 return;
1475 if(ISVISIBLE(c)) { /* show clients top down */
1476 XMoveWindow(dpy, c->win, c->x, c->y);
1477 if(!c->mon->lt[c->mon->sellt]->arrange || c->isfloating)
1478 resize(c, c->x, c->y, c->w, c->h, False);
1479 showhide(c->snext);
1480 }
1481 else { /* hide clients bottom up */
1482 showhide(c->snext);
1483 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
1484 }
1485}
1486
1487
1488void
1489sigchld(int signal) {
1490 while(0 < waitpid(-1, NULL, WNOHANG));
1491}
1492
1493void
1494spawn(const Arg *arg) {
1495 signal(SIGCHLD, sigchld);
1496 if(fork() == 0) {
1497 if(dpy)
1498 close(ConnectionNumber(dpy));
1499 setsid();
1500 execvp(((char **)arg->v)[0], (char **)arg->v);
1501 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1502 perror(" failed");
1503 exit(0);
1504 }
1505}
1506
1507void
1508tag(const Arg *arg) {
1509 if(selmon->sel && arg->ui & TAGMASK) {
1510 selmon->sel->tags = arg->ui & TAGMASK;
1511 arrange();
1512 }
1513}
1514
1515void
1516tagmon(const Arg *arg) {
1517 if(!selmon->sel || !mons->next)
1518 return;
1519 sendmon(selmon->sel, dirtomon(arg->i));
1520}
1521
1522int
1523textnw(const char *text, unsigned int len) {
1524 XRectangle r;
1525
1526 if(dc.font.set) {
1527 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1528 return r.width;
1529 }
1530 return XTextWidth(dc.font.xfont, text, len);
1531}
1532
1533void
1534tile(Monitor *m) {
1535 int x, y, h, w, mw;
1536 unsigned int i, n;
1537 Client *c;
1538
1539 for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1540 if(n == 0)
1541 return;
1542 /* master */
1543 c = nexttiled(m->clients);
1544 mw = m->mfact * m->ww;
1545 resize(c, m->wx, m->wy, (n == 1 ? m->ww : mw) - 2 * c->bw, m->wh - 2 * c->bw, False);
1546 if(--n == 0)
1547 return;
1548 /* tile stack */
1549 x = (m->wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : m->wx + mw;
1550 y = m->wy;
1551 w = (m->wx + mw > c->x + c->w) ? m->wx + m->ww - x : m->ww - mw;
1552 h = m->wh / n;
1553 if(h < bh)
1554 h = m->wh;
1555 for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1556 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1557 ? m->wy + m->wh - y - 2 * c->bw : h - 2 * c->bw), False);
1558 if(h != m->wh)
1559 y = c->y + HEIGHT(c);
1560 }
1561}
1562
1563void
1564togglebar(const Arg *arg) {
1565 selmon->showbar = !selmon->showbar;
1566 updatebarpos(selmon);
1567 XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1568 arrange();
1569}
1570
1571void
1572togglefloating(const Arg *arg) {
1573 if(!selmon->sel)
1574 return;
1575 selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1576 if(selmon->sel->isfloating)
1577 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1578 selmon->sel->w, selmon->sel->h, False);
1579 arrange();
1580}
1581
1582void
1583toggletag(const Arg *arg) {
1584 unsigned int mask;
1585
1586 if(!selmon->sel)
1587 return;
1588 mask = selmon->sel->tags ^ (arg->ui & TAGMASK);
1589 if(mask) {
1590 selmon->sel->tags = mask;
1591 arrange();
1592 }
1593}
1594
1595void
1596toggleview(const Arg *arg) {
1597 unsigned int mask = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1598
1599 if(mask) {
1600 selmon->tagset[selmon->seltags] = mask;
1601 arrange();
1602 }
1603}
1604
1605void
1606unfocus(Client *c) {
1607 if(!c)
1608 return;
1609 grabbuttons(c, False);
1610 XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
1611 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1612}
1613
1614void
1615unmanage(Client *c) {
1616 XWindowChanges wc;
1617
1618 wc.border_width = c->oldbw;
1619 /* The server grab construct avoids race conditions. */
1620 XGrabServer(dpy);
1621 XSetErrorHandler(xerrordummy);
1622 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1623 detach(c);
1624 detachstack(c);
1625 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1626 setclientstate(c, WithdrawnState);
1627 free(c);
1628 XSync(dpy, False);
1629 XSetErrorHandler(xerror);
1630 XUngrabServer(dpy);
1631 focus(NULL);
1632 arrange();
1633}
1634
1635void
1636unmapnotify(XEvent *e) {
1637 Client *c;
1638 XUnmapEvent *ev = &e->xunmap;
1639
1640 if((c = wintoclient(ev->window)))
1641 unmanage(c);
1642}
1643
1644void
1645updatebars(void) {
1646 Monitor *m;
1647 XSetWindowAttributes wa;
1648
1649 wa.override_redirect = True;
1650 wa.background_pixmap = ParentRelative;
1651 wa.event_mask = ButtonPressMask|ExposureMask;
1652 for(m = mons; m; m = m->next) {
1653 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1654 CopyFromParent, DefaultVisual(dpy, screen),
1655 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1656 XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
1657 XMapRaised(dpy, m->barwin);
1658 }
1659}
1660
1661void
1662updatebarpos(Monitor *m) {
1663 m->wy = m->my;
1664 m->wh = m->mh;
1665 if(m->showbar) {
1666 m->wh -= bh;
1667 m->by = m->topbar ? m->wy : m->wy + m->wh;
1668 m->wy = m->topbar ? m->wy + bh : m->wy;
1669 }
1670 else
1671 m->by = -bh;
1672}
1673
1674void
1675updategeom(void) {
1676 int i, n = 1;
1677 Client *c;
1678 Monitor *newmons = NULL, *m, *tm;
1679
1680#ifdef XINERAMA
1681 XineramaScreenInfo *info = NULL;
1682
1683 if(XineramaIsActive(dpy))
1684 info = XineramaQueryScreens(dpy, &n);
1685#endif /* XINERAMA */
1686 /* allocate monitor(s) for the new geometry setup */
1687 for(i = 0; i < n; i++) {
1688 if(!(m = (Monitor *)malloc(sizeof(Monitor))))
1689 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
1690 m->next = newmons;
1691 newmons = m;
1692 }
1693 /* initialise monitor(s) */
1694#ifdef XINERAMA
1695 if(XineramaIsActive(dpy)) {
1696 for(i = 0, m = newmons; m; m = m->next, i++) {
1697 m->screen_number = info[i].screen_number;
1698 m->mx = m->wx = info[i].x_org;
1699 m->my = m->wy = info[i].y_org;
1700 m->mw = m->ww = info[i].width;
1701 m->mh = m->wh = info[i].height;
1702 }
1703 XFree(info);
1704 }
1705 else
1706#endif /* XINERAMA */
1707 /* default monitor setup */
1708 {
1709 m->screen_number = 0;
1710 m->mx = m->wx = 0;
1711 m->my = m->wy = 0;
1712 m->mw = m->ww = sw;
1713 m->mh = m->wh = sh;
1714 }
1715 /* bar geometry setup */
1716 for(m = newmons; m; m = m->next) {
1717 m->sel = m->stack = m->clients = NULL;
1718 m->seltags = 0;
1719 m->sellt = 0;
1720 m->tagset[0] = m->tagset[1] = 1;
1721 m->mfact = mfact;
1722 m->showbar = showbar;
1723 m->topbar = topbar;
1724 m->lt[0] = &layouts[0];
1725 m->lt[1] = &layouts[1 % LENGTH(layouts)];
1726 updatebarpos(m);
1727 }
1728 /* reassign left over clients of disappeared monitors */
1729 for(tm = mons; tm; tm = tm->next)
1730 while(tm->clients) {
1731 c = tm->clients;
1732 tm->clients = c->next;
1733 detachstack(c);
1734 c->mon = newmons;
1735 attach(c);
1736 attachstack(c);
1737 }
1738 /* select focused monitor */
1739 cleanupmons();
1740 selmon = mons = newmons;
1741 selmon = wintomon(root);
1742}
1743
1744void
1745updatenumlockmask(void) {
1746 unsigned int i, j;
1747 XModifierKeymap *modmap;
1748
1749 numlockmask = 0;
1750 modmap = XGetModifierMapping(dpy);
1751 for(i = 0; i < 8; i++)
1752 for(j = 0; j < modmap->max_keypermod; j++)
1753 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1754 == XKeysymToKeycode(dpy, XK_Num_Lock))
1755 numlockmask = (1 << i);
1756 XFreeModifiermap(modmap);
1757}
1758
1759void
1760updatesizehints(Client *c) {
1761 long msize;
1762 XSizeHints size;
1763
1764 if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1765 /* size is uninitialized, ensure that size.flags aren't used */
1766 size.flags = PSize;
1767 if(size.flags & PBaseSize) {
1768 c->basew = size.base_width;
1769 c->baseh = size.base_height;
1770 }
1771 else if(size.flags & PMinSize) {
1772 c->basew = size.min_width;
1773 c->baseh = size.min_height;
1774 }
1775 else
1776 c->basew = c->baseh = 0;
1777 if(size.flags & PResizeInc) {
1778 c->incw = size.width_inc;
1779 c->inch = size.height_inc;
1780 }
1781 else
1782 c->incw = c->inch = 0;
1783 if(size.flags & PMaxSize) {
1784 c->maxw = size.max_width;
1785 c->maxh = size.max_height;
1786 }
1787 else
1788 c->maxw = c->maxh = 0;
1789 if(size.flags & PMinSize) {
1790 c->minw = size.min_width;
1791 c->minh = size.min_height;
1792 }
1793 else if(size.flags & PBaseSize) {
1794 c->minw = size.base_width;
1795 c->minh = size.base_height;
1796 }
1797 else
1798 c->minw = c->minh = 0;
1799 if(size.flags & PAspect) {
1800 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1801 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1802 }
1803 else
1804 c->maxa = c->mina = 0.0;
1805 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1806 && c->maxw == c->minw && c->maxh == c->minh);
1807}
1808
1809void
1810updatetitle(Client *c) {
1811 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1812 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1813}
1814
1815void
1816updatestatus(void) {
1817 if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1818 strcpy(stext, "dwm-"VERSION);
1819 drawbar(selmon);
1820}
1821
1822void
1823updatewmhints(Client *c) {
1824 XWMHints *wmh;
1825
1826 if((wmh = XGetWMHints(dpy, c->win))) {
1827 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1828 wmh->flags &= ~XUrgencyHint;
1829 XSetWMHints(dpy, c->win, wmh);
1830 }
1831 else
1832 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1833 XFree(wmh);
1834 }
1835}
1836
1837void
1838view(const Arg *arg) {
1839 if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1840 return;
1841 selmon->seltags ^= 1; /* toggle sel tagset */
1842 if(arg->ui & TAGMASK)
1843 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1844 arrange();
1845}
1846
1847Client *
1848wintoclient(Window w) {
1849 Client *c;
1850 Monitor *m;
1851
1852 for(m = mons; m; m = m->next)
1853 for(c = m->clients; c; c = c->next)
1854 if(c->win == w)
1855 return c;
1856 return NULL;
1857}
1858
1859Monitor *
1860wintomon(Window w) {
1861 int x, y;
1862 Client *c;
1863 Monitor *m;
1864
1865 if(w == root && getrootptr(&x, &y))
1866 return ptrtomon(x, y);
1867 for(m = mons; m; m = m->next)
1868 if(w == m->barwin)
1869 return m;
1870 if((c = wintoclient(w)))
1871 return c->mon;
1872 return selmon;
1873}
1874
1875/* There's no way to check accesses to destroyed windows, thus those cases are
1876 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1877 * default error handler, which may call exit. */
1878int
1879xerror(Display *dpy, XErrorEvent *ee) {
1880 if(ee->error_code == BadWindow
1881 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1882 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1883 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1884 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1885 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1886 || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1887 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1888 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1889 return 0;
1890 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1891 ee->request_code, ee->error_code);
1892 return xerrorxlib(dpy, ee); /* may call exit */
1893}
1894
1895int
1896xerrordummy(Display *dpy, XErrorEvent *ee) {
1897 return 0;
1898}
1899
1900/* Startup Error handler to check if another window manager
1901 * is already running. */
1902int
1903xerrorstart(Display *dpy, XErrorEvent *ee) {
1904 otherwm = True;
1905 return -1;
1906}
1907
1908void
1909zoom(const Arg *arg) {
1910 Client *c = selmon->sel;
1911
1912 if(!selmon->lt[selmon->sellt]->arrange
1913 || selmon->lt[selmon->sellt]->arrange == monocle
1914 || (selmon->sel && selmon->sel->isfloating))
1915 return;
1916 if(c == nexttiled(selmon->clients))
1917 if(!c || !(c = nexttiled(c->next)))
1918 return;
1919 detach(c);
1920 attach(c);
1921 focus(c);
1922 arrange();
1923}
1924
1925int
1926main(int argc, char *argv[]) {
1927 if(argc == 2 && !strcmp("-v", argv[1]))
1928 die("dwm-"VERSION", © 2006-2009 dwm engineers, see LICENSE for details\n");
1929 else if(argc != 1)
1930 die("usage: dwm [-v]\n");
1931 if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1932 fputs("warning: no locale support\n", stderr);
1933 if(!(dpy = XOpenDisplay(NULL)))
1934 die("dwm: cannot open display\n");
1935 checkotherwm();
1936 setup();
1937 scan();
1938 run();
1939 cleanup();
1940 XCloseDisplay(dpy);
1941 return 0;
1942}