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 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client.
21 *
22 * Keys and tagging rules are organized as arrays and defined in config.h.
23 *
24 * To understand everything else, start reading main().
25 */
26#include <errno.h>
27#include <locale.h>
28#include <stdarg.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33#include <sys/select.h>
34#include <sys/types.h>
35#include <sys/wait.h>
36#include <regex.h>
37#include <X11/cursorfont.h>
38#include <X11/keysym.h>
39#include <X11/Xatom.h>
40#include <X11/Xlib.h>
41#include <X11/Xproto.h>
42#include <X11/Xutil.h>
43//#ifdef XINERAMA
44#include <X11/extensions/Xinerama.h>
45//#endif
46
47/* macros */
48#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
49#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
50#define LENGTH(x) (sizeof x / sizeof x[0])
51#define MAXTAGLEN 16
52#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
53
54
55/* enums */
56enum { BarTop, BarBot, BarOff }; /* bar position */
57enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
58enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
59enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
60enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
61
62/* typedefs */
63typedef struct View View;
64typedef struct Client Client;
65struct Client {
66 char name[256];
67 int x, y, w, h;
68 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
69 int minax, maxax, minay, maxay;
70 long flags;
71 unsigned int border, oldborder;
72 Bool isbanned, isfixed, isfloating, isurgent;
73 Bool *tags;
74 View *view;
75 Client *next;
76 Client *prev;
77 Client *snext;
78 Window win;
79};
80
81typedef struct {
82 int x, y, w, h;
83 unsigned long norm[ColLast];
84 unsigned long sel[ColLast];
85 Drawable drawable;
86 GC gc;
87 struct {
88 int ascent;
89 int descent;
90 int height;
91 XFontSet set;
92 XFontStruct *xfont;
93 } font;
94} DC; /* draw context */
95
96typedef struct {
97 unsigned long mod;
98 KeySym keysym;
99 void (*func)(const char *arg);
100 const char *arg;
101} Key;
102
103typedef struct {
104 const char *symbol;
105 void (*arrange)(View *);
106} Layout;
107
108typedef struct {
109 const char *prop;
110 const char *tag;
111 Bool isfloating;
112} Rule;
113
114struct View {
115 unsigned int id;
116 int x, y, w, h, wax, way, wah, waw;
117 double mwfact;
118 Layout *layout;
119 Window barwin;
120};
121
122/* function declarations */
123void addtag(Client *c, const char *t);
124void applyrules(Client *c);
125void arrange(void);
126void attach(Client *c);
127void attachstack(Client *c);
128void ban(Client *c);
129void buttonpress(XEvent *e);
130void checkotherwm(void);
131void cleanup(void);
132void configure(Client *c);
133void configurenotify(XEvent *e);
134void configurerequest(XEvent *e);
135void destroynotify(XEvent *e);
136void detach(Client *c);
137void detachstack(Client *c);
138void drawbar(View *v);
139void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
140void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
141void *emallocz(unsigned int size);
142void enternotify(XEvent *e);
143void eprint(const char *errstr, ...);
144void expose(XEvent *e);
145void floating(View *v); /* default floating layout */
146void focus(Client *c);
147void focusin(XEvent *e);
148void focusnext(const char *arg);
149void focusprev(const char *arg);
150Client *getclient(Window w);
151unsigned long getcolor(const char *colstr);
152View *getviewbar(Window barwin);
153long getstate(Window w);
154Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
155void grabbuttons(Client *c, Bool focused);
156void grabkeys(void);
157unsigned int idxoftag(const char *t);
158void initfont(const char *fontstr);
159Bool isoccupied(unsigned int t);
160Bool isprotodel(Client *c);
161Bool isurgent(unsigned int t);
162Bool isvisible(Client *c);
163void keypress(XEvent *e);
164void killclient(const char *arg);
165void manage(Window w, XWindowAttributes *wa);
166void mappingnotify(XEvent *e);
167void maprequest(XEvent *e);
168View *viewat(void);
169void movemouse(Client *c);
170Client *nexttiled(Client *c, View *v);
171void propertynotify(XEvent *e);
172void quit(const char *arg);
173void reapply(const char *arg);
174void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
175void resizemouse(Client *c);
176void restack(View *v);
177void run(void);
178void scan(void);
179void setclientstate(Client *c, long state);
180void setlayout(const char *arg);
181void setmwfact(const char *arg);
182void setup(void);
183void spawn(const char *arg);
184void tag(const char *arg);
185unsigned int textnw(const char *text, unsigned int len);
186unsigned int textw(const char *text);
187void tile(View *v);
188void togglebar(const char *arg);
189void togglefloating(const char *arg);
190void toggletag(const char *arg);
191void toggleview(const char *arg);
192void unban(Client *c);
193void unmanage(Client *c);
194void unmapnotify(XEvent *e);
195void updatebarpos(View *v);
196void updatesizehints(Client *c);
197void updatetitle(Client *c);
198void updatewmhints(Client *c);
199void view(const char *arg);
200void viewprevtag(const char *arg); /* views previous selected tags */
201int xerror(Display *dpy, XErrorEvent *ee);
202int xerrordummy(Display *dpy, XErrorEvent *ee);
203int xerrorstart(Display *dpy, XErrorEvent *ee);
204void zoom(const char *arg);
205void selectview(const char *arg);
206
207/* variables */
208char stext[256], buf[256];
209int nviews = 1;
210int screen;
211int (*xerrorxlib)(Display *, XErrorEvent *);
212unsigned int bh, bpos;
213unsigned int blw = 0;
214unsigned int numlockmask = 0;
215void (*handler[LASTEvent]) (XEvent *) = {
216 [ButtonPress] = buttonpress,
217 [ConfigureRequest] = configurerequest,
218 [ConfigureNotify] = configurenotify,
219 [DestroyNotify] = destroynotify,
220 [EnterNotify] = enternotify,
221 [Expose] = expose,
222 [FocusIn] = focusin,
223 [KeyPress] = keypress,
224 [MappingNotify] = mappingnotify,
225 [MapRequest] = maprequest,
226 [PropertyNotify] = propertynotify,
227 [UnmapNotify] = unmapnotify
228};
229Atom wmatom[WMLast], netatom[NetLast];
230Bool domwfact = True;
231Bool dozoom = True;
232Bool otherwm, readin;
233Bool running = True;
234Bool *prevtags;
235Bool *seltags;
236Client *clients = NULL;
237Client *sel = NULL;
238Client *stack = NULL;
239Cursor cursor[CurLast];
240Display *dpy;
241DC dc = {0};
242View *views;
243View *selview;
244Window root;
245
246/* configuration, allows nested code to access above variables */
247#include "config.h"
248#define TAGSZ (LENGTH(tags) * sizeof(Bool))
249
250/* function implementations */
251void
252addtag(Client *c, const char *t) {
253 unsigned int i, tidx = idxoftag(t);
254
255 for(i = 0; i < LENGTH(tags); i++)
256 if(c->tags[i] && vtags[i] != vtags[tidx])
257 return; /* conflict */
258 c->tags[tidx] = True;
259 c->view = &views[vtags[tidx]];
260}
261
262void
263applyrules(Client *c) {
264 unsigned int i;
265 Bool matched = False;
266 Rule *r;
267 XClassHint ch = { 0 };
268
269 /* rule matching */
270 XGetClassHint(dpy, c->win, &ch);
271 for(i = 0; i < LENGTH(rules); i++) {
272 r = &rules[i];
273 if(strstr(c->name, r->prop)
274 || (ch.res_class && strstr(ch.res_class, r->prop))
275 || (ch.res_name && strstr(ch.res_name, r->prop)))
276 {
277 c->isfloating = r->isfloating;
278 if(r->tag) {
279 addtag(c, r->tag);
280 matched = True;
281 }
282 }
283 }
284 if(ch.res_class)
285 XFree(ch.res_class);
286 if(ch.res_name)
287 XFree(ch.res_name);
288 if(!matched) {
289 memcpy(c->tags, seltags, TAGSZ);
290 c->view = selview;
291 }
292}
293
294void
295arrange(void) {
296 unsigned int i;
297 Client *c;
298
299 for(c = clients; c; c = c->next)
300 if(isvisible(c))
301 unban(c);
302 else
303 ban(c);
304
305 for(i = 0; i < nviews; i++) {
306 views[i].layout->arrange(&views[i]);
307 restack(&views[i]);
308 }
309 focus(NULL);
310}
311
312void
313attach(Client *c) {
314 if(clients)
315 clients->prev = c;
316 c->next = clients;
317 clients = c;
318}
319
320void
321attachstack(Client *c) {
322 c->snext = stack;
323 stack = c;
324}
325
326void
327ban(Client *c) {
328 if(c->isbanned)
329 return;
330 XMoveWindow(dpy, c->win, c->x + 3 * c->view->w, c->y);
331 c->isbanned = True;
332}
333
334void
335buttonpress(XEvent *e) {
336 unsigned int i, x;
337 Client *c;
338 XButtonPressedEvent *ev = &e->xbutton;
339
340 if(ev->window == selview->barwin) {
341 x = 0;
342 for(i = 0; i < LENGTH(tags); i++) {
343 if(&views[vtags[i]] != selview)
344 continue;
345 x += textw(tags[i]);
346 if(ev->x < x) {
347 if(ev->button == Button1) {
348 if(ev->state & MODKEY)
349 tag(tags[i]);
350 else
351 view(tags[i]);
352 }
353 else if(ev->button == Button3) {
354 if(ev->state & MODKEY)
355 toggletag(tags[i]);
356 else
357 toggleview(tags[i]);
358 }
359 return;
360 }
361 }
362 if((ev->x < x + blw) && ev->button == Button1)
363 setlayout(NULL);
364 }
365 else if((c = getclient(ev->window))) {
366 focus(c);
367 if(CLEANMASK(ev->state) != MODKEY)
368 return;
369 if(ev->button == Button1) {
370 restack(c->view);
371 movemouse(c);
372 }
373 else if(ev->button == Button2) {
374 if((floating != c->view->layout->arrange) && c->isfloating)
375 togglefloating(NULL);
376 else
377 zoom(NULL);
378 }
379 else if(ev->button == Button3 && !c->isfixed) {
380 restack(c->view);
381 resizemouse(c);
382 }
383 }
384}
385
386void
387checkotherwm(void) {
388 otherwm = False;
389 XSetErrorHandler(xerrorstart);
390
391 /* this causes an error if some other window manager is running */
392 XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
393 XSync(dpy, False);
394 if(otherwm)
395 eprint("dwm: another window manager is already running\n");
396 XSync(dpy, False);
397 XSetErrorHandler(NULL);
398 xerrorxlib = XSetErrorHandler(xerror);
399 XSync(dpy, False);
400}
401
402void
403cleanup(void) {
404 unsigned int i;
405 close(STDIN_FILENO);
406 while(stack) {
407 unban(stack);
408 unmanage(stack);
409 }
410 if(dc.font.set)
411 XFreeFontSet(dpy, dc.font.set);
412 else
413 XFreeFont(dpy, dc.font.xfont);
414
415 XUngrabKey(dpy, AnyKey, AnyModifier, root);
416 XFreePixmap(dpy, dc.drawable);
417 XFreeGC(dpy, dc.gc);
418 XFreeCursor(dpy, cursor[CurNormal]);
419 XFreeCursor(dpy, cursor[CurResize]);
420 XFreeCursor(dpy, cursor[CurMove]);
421 for(i = 0; i < nviews; i++)
422 XDestroyWindow(dpy, views[i].barwin);
423 XSync(dpy, False);
424 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
425}
426
427void
428configure(Client *c) {
429 XConfigureEvent ce;
430
431 ce.type = ConfigureNotify;
432 ce.display = dpy;
433 ce.event = c->win;
434 ce.window = c->win;
435 ce.x = c->x;
436 ce.y = c->y;
437 ce.width = c->w;
438 ce.height = c->h;
439 ce.border_width = c->border;
440 ce.above = None;
441 ce.override_redirect = False;
442 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
443}
444
445void
446configurenotify(XEvent *e) {
447 XConfigureEvent *ev = &e->xconfigure;
448 View *v = selview;
449
450 if(ev->window == root && (ev->width != v->w || ev->height != v->h)) {
451 /* TODO -- update Xinerama dimensions here */
452 v->w = ev->width;
453 v->h = ev->height;
454 XFreePixmap(dpy, dc.drawable);
455 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
456 XResizeWindow(dpy, v->barwin, v->w, bh);
457 updatebarpos(selview);
458 arrange();
459 }
460}
461
462void
463configurerequest(XEvent *e) {
464 Client *c;
465 XConfigureRequestEvent *ev = &e->xconfigurerequest;
466 XWindowChanges wc;
467
468 if((c = getclient(ev->window))) {
469 View *v = c->view;
470 if(ev->value_mask & CWBorderWidth)
471 c->border = ev->border_width;
472 if(c->isfixed || c->isfloating || (floating == v->layout->arrange)) {
473 if(ev->value_mask & CWX)
474 c->x = v->x + ev->x;
475 if(ev->value_mask & CWY)
476 c->y = v->y + ev->y;
477 if(ev->value_mask & CWWidth)
478 c->w = ev->width;
479 if(ev->value_mask & CWHeight)
480 c->h = ev->height;
481 if((c->x - v->x + c->w) > v->w && c->isfloating)
482 c->x = v->x + (v->w / 2 - c->w / 2); /* center in x direction */
483 if((c->y - v->y + c->h) > v->h && c->isfloating)
484 c->y = v->y + (v->h / 2 - c->h / 2); /* center in y direction */
485 if((ev->value_mask & (CWX|CWY))
486 && !(ev->value_mask & (CWWidth|CWHeight)))
487 configure(c);
488 if(isvisible(c))
489 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
490 }
491 else
492 configure(c);
493 }
494 else {
495 wc.x = ev->x;
496 wc.y = ev->y;
497 wc.width = ev->width;
498 wc.height = ev->height;
499 wc.border_width = ev->border_width;
500 wc.sibling = ev->above;
501 wc.stack_mode = ev->detail;
502 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
503 }
504 XSync(dpy, False);
505}
506
507void
508destroynotify(XEvent *e) {
509 Client *c;
510 XDestroyWindowEvent *ev = &e->xdestroywindow;
511
512 if((c = getclient(ev->window)))
513 unmanage(c);
514}
515
516void
517detach(Client *c) {
518 if(c->prev)
519 c->prev->next = c->next;
520 if(c->next)
521 c->next->prev = c->prev;
522 if(c == clients)
523 clients = c->next;
524 c->next = c->prev = NULL;
525}
526
527void
528detachstack(Client *c) {
529 Client **tc;
530
531 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
532 *tc = c->snext;
533}
534
535void
536drawbar(View *v) {
537 int i, x;
538 Client *c;
539
540 dc.x = 0;
541 for(c = stack; c && (!isvisible(c) || c->view != v); c = c->snext);
542 for(i = 0; i < LENGTH(tags); i++) {
543 if(&views[vtags[i]] != v)
544 continue;
545 dc.w = textw(tags[i]);
546 if(seltags[i]) {
547 drawtext(tags[i], dc.sel, isurgent(i));
548 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
549 }
550 else {
551 drawtext(tags[i], dc.norm, isurgent(i));
552 drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
553 }
554 dc.x += dc.w;
555 }
556 dc.w = blw;
557 drawtext(v->layout->symbol, dc.norm, False);
558 x = dc.x + dc.w;
559 if(v == selview) {
560 dc.w = textw(stext);
561 dc.x = v->w - dc.w;
562 if(dc.x < x) {
563 dc.x = x;
564 dc.w = v->w - x;
565 }
566 drawtext(stext, dc.norm, False);
567 }
568 else
569 dc.x = v->w;
570 if((dc.w = dc.x - x) > bh) {
571 dc.x = x;
572 if(c) {
573 drawtext(c->name, dc.sel, False);
574 drawsquare(False, c->isfloating, False, dc.sel);
575 }
576 else
577 drawtext(NULL, dc.norm, False);
578 }
579 XCopyArea(dpy, dc.drawable, v->barwin, dc.gc, 0, 0, v->w, bh, 0, 0);
580 XSync(dpy, False);
581}
582
583void
584drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
585 int x;
586 XGCValues gcv;
587 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
588
589 gcv.foreground = col[invert ? ColBG : ColFG];
590 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
591 x = (dc.font.ascent + dc.font.descent + 2) / 4;
592 r.x = dc.x + 1;
593 r.y = dc.y + 1;
594 if(filled) {
595 r.width = r.height = x + 1;
596 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
597 }
598 else if(empty) {
599 r.width = r.height = x;
600 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
601 }
602}
603
604void
605drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
606 int x, y, w, h;
607 unsigned int len, olen;
608 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
609
610 XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
611 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
612 if(!text)
613 return;
614 w = 0;
615 olen = len = strlen(text);
616 if(len >= sizeof buf)
617 len = sizeof buf - 1;
618 memcpy(buf, text, len);
619 buf[len] = 0;
620 h = dc.font.ascent + dc.font.descent;
621 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
622 x = dc.x + (h / 2);
623 /* shorten text if necessary */
624 while(len && (w = textnw(buf, len)) > dc.w - h)
625 buf[--len] = 0;
626 if(len < olen) {
627 if(len > 1)
628 buf[len - 1] = '.';
629 if(len > 2)
630 buf[len - 2] = '.';
631 if(len > 3)
632 buf[len - 3] = '.';
633 }
634 if(w > dc.w)
635 return; /* too long */
636 XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
637 if(dc.font.set)
638 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
639 else
640 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
641}
642
643void *
644emallocz(unsigned int size) {
645 void *res = calloc(1, size);
646
647 if(!res)
648 eprint("fatal: could not malloc() %u bytes\n", size);
649 return res;
650}
651
652void
653enternotify(XEvent *e) {
654 Client *c;
655 XCrossingEvent *ev = &e->xcrossing;
656
657 if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
658 return;
659 if((c = getclient(ev->window)))
660 focus(c);
661 else
662 focus(NULL);
663}
664
665void
666eprint(const char *errstr, ...) {
667 va_list ap;
668
669 va_start(ap, errstr);
670 vfprintf(stderr, errstr, ap);
671 va_end(ap);
672 exit(EXIT_FAILURE);
673}
674
675void
676expose(XEvent *e) {
677 View *v;
678 XExposeEvent *ev = &e->xexpose;
679
680 if(ev->count == 0 && ((v = getviewbar(ev->window))))
681 drawbar(v);
682}
683
684void
685floating(View *v) { /* default floating layout */
686 Client *c;
687
688 domwfact = dozoom = False;
689 for(c = clients; c; c = c->next)
690 if(isvisible(c))
691 resize(c, c->x, c->y, c->w, c->h, True);
692}
693
694void
695focus(Client *c) {
696 View *v = selview;
697 if(c)
698 selview = c->view;
699 else
700 selview = viewat();
701 if(selview != v)
702 drawbar(v);
703 if(!c || (c && !isvisible(c)))
704 for(c = stack; c && (!isvisible(c) || c->view != selview); c = c->snext);
705 if(sel && sel != c) {
706 grabbuttons(sel, False);
707 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
708 }
709 if(c) {
710 detachstack(c);
711 attachstack(c);
712 grabbuttons(c, True);
713 }
714 sel = c;
715 if(c) {
716 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
717 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
718 selview = c->view;
719 }
720 else
721 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
722 drawbar(selview);
723}
724
725void
726focusin(XEvent *e) { /* there are some broken focus acquiring clients */
727 XFocusChangeEvent *ev = &e->xfocus;
728
729 if(sel && ev->window != sel->win)
730 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
731}
732
733void
734focusnext(const char *arg) {
735 Client *c;
736
737 if(!sel)
738 return;
739 for(c = sel->next; c && !isvisible(c); c = c->next);
740 if(!c)
741 for(c = clients; c && !isvisible(c); c = c->next);
742 if(c) {
743 focus(c);
744 restack(c->view);
745 }
746}
747
748void
749focusprev(const char *arg) {
750 Client *c;
751
752 if(!sel)
753 return;
754 for(c = sel->prev; c && !isvisible(c); c = c->prev);
755 if(!c) {
756 for(c = clients; c && c->next; c = c->next);
757 for(; c && !isvisible(c); c = c->prev);
758 }
759 if(c) {
760 focus(c);
761 restack(c->view);
762 }
763}
764
765Client *
766getclient(Window w) {
767 Client *c;
768
769 for(c = clients; c && c->win != w; c = c->next);
770 return c;
771}
772
773unsigned long
774getcolor(const char *colstr) {
775 Colormap cmap = DefaultColormap(dpy, screen);
776 XColor color;
777
778 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
779 eprint("error, cannot allocate color '%s'\n", colstr);
780 return color.pixel;
781}
782
783View *
784getviewbar(Window barwin) {
785 unsigned int i;
786
787 for(i = 0; i < nviews; i++)
788 if(views[i].barwin == barwin)
789 return &views[i];
790 return NULL;
791}
792
793long
794getstate(Window w) {
795 int format, status;
796 long result = -1;
797 unsigned char *p = NULL;
798 unsigned long n, extra;
799 Atom real;
800
801 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
802 &real, &format, &n, &extra, (unsigned char **)&p);
803 if(status != Success)
804 return -1;
805 if(n != 0)
806 result = *p;
807 XFree(p);
808 return result;
809}
810
811Bool
812gettextprop(Window w, Atom atom, char *text, unsigned int size) {
813 char **list = NULL;
814 int n;
815 XTextProperty name;
816
817 if(!text || size == 0)
818 return False;
819 text[0] = '\0';
820 XGetTextProperty(dpy, w, &name, atom);
821 if(!name.nitems)
822 return False;
823 if(name.encoding == XA_STRING)
824 strncpy(text, (char *)name.value, size - 1);
825 else {
826 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
827 && n > 0 && *list) {
828 strncpy(text, *list, size - 1);
829 XFreeStringList(list);
830 }
831 }
832 text[size - 1] = '\0';
833 XFree(name.value);
834 return True;
835}
836
837void
838grabbuttons(Client *c, Bool focused) {
839 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
840
841 if(focused) {
842 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
843 GrabModeAsync, GrabModeSync, None, None);
844 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
845 GrabModeAsync, GrabModeSync, None, None);
846 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
847 GrabModeAsync, GrabModeSync, None, None);
848 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
849 GrabModeAsync, GrabModeSync, None, None);
850
851 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
852 GrabModeAsync, GrabModeSync, None, None);
853 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
854 GrabModeAsync, GrabModeSync, None, None);
855 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
856 GrabModeAsync, GrabModeSync, None, None);
857 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
858 GrabModeAsync, GrabModeSync, None, None);
859
860 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
861 GrabModeAsync, GrabModeSync, None, None);
862 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
863 GrabModeAsync, GrabModeSync, None, None);
864 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
865 GrabModeAsync, GrabModeSync, None, None);
866 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
867 GrabModeAsync, GrabModeSync, None, None);
868 }
869 else
870 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
871 GrabModeAsync, GrabModeSync, None, None);
872}
873
874void
875grabkeys(void) {
876 unsigned int i, j;
877 KeyCode code;
878 XModifierKeymap *modmap;
879
880 /* init modifier map */
881 modmap = XGetModifierMapping(dpy);
882 for(i = 0; i < 8; i++)
883 for(j = 0; j < modmap->max_keypermod; j++) {
884 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
885 numlockmask = (1 << i);
886 }
887 XFreeModifiermap(modmap);
888
889 XUngrabKey(dpy, AnyKey, AnyModifier, root);
890 for(i = 0; i < LENGTH(keys); i++) {
891 code = XKeysymToKeycode(dpy, keys[i].keysym);
892 XGrabKey(dpy, code, keys[i].mod, root, True,
893 GrabModeAsync, GrabModeAsync);
894 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
895 GrabModeAsync, GrabModeAsync);
896 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
897 GrabModeAsync, GrabModeAsync);
898 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
899 GrabModeAsync, GrabModeAsync);
900 }
901}
902
903unsigned int
904idxoftag(const char *t) {
905 unsigned int i;
906
907 for(i = 0; (i < LENGTH(tags)) && (tags[i] != t); i++);
908 return (i < LENGTH(tags)) ? i : 0;
909}
910
911void
912initfont(const char *fontstr) {
913 char *def, **missing;
914 int i, n;
915
916 missing = NULL;
917 if(dc.font.set)
918 XFreeFontSet(dpy, dc.font.set);
919 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
920 if(missing) {
921 while(n--)
922 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
923 XFreeStringList(missing);
924 }
925 if(dc.font.set) {
926 XFontSetExtents *font_extents;
927 XFontStruct **xfonts;
928 char **font_names;
929 dc.font.ascent = dc.font.descent = 0;
930 font_extents = XExtentsOfFontSet(dc.font.set);
931 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
932 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
933 if(dc.font.ascent < (*xfonts)->ascent)
934 dc.font.ascent = (*xfonts)->ascent;
935 if(dc.font.descent < (*xfonts)->descent)
936 dc.font.descent = (*xfonts)->descent;
937 xfonts++;
938 }
939 }
940 else {
941 if(dc.font.xfont)
942 XFreeFont(dpy, dc.font.xfont);
943 dc.font.xfont = NULL;
944 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
945 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
946 eprint("error, cannot load font: '%s'\n", fontstr);
947 dc.font.ascent = dc.font.xfont->ascent;
948 dc.font.descent = dc.font.xfont->descent;
949 }
950 dc.font.height = dc.font.ascent + dc.font.descent;
951}
952
953Bool
954isoccupied(unsigned int t) {
955 Client *c;
956
957 for(c = clients; c; c = c->next)
958 if(c->tags[t])
959 return True;
960 return False;
961}
962
963Bool
964isprotodel(Client *c) {
965 int i, n;
966 Atom *protocols;
967 Bool ret = False;
968
969 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
970 for(i = 0; !ret && i < n; i++)
971 if(protocols[i] == wmatom[WMDelete])
972 ret = True;
973 XFree(protocols);
974 }
975 return ret;
976}
977
978Bool
979isurgent(unsigned int t) {
980 Client *c;
981
982 for(c = clients; c; c = c->next)
983 if(c->isurgent && c->tags[t])
984 return True;
985 return False;
986}
987
988Bool
989isvisible(Client *c) {
990 unsigned int i;
991
992 for(i = 0; i < LENGTH(tags); i++)
993 if(c->tags[i] && seltags[i])
994 return True;
995 return False;
996}
997
998void
999keypress(XEvent *e) {
1000 unsigned int i;
1001 KeySym keysym;
1002 XKeyEvent *ev;
1003
1004 ev = &e->xkey;
1005 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1006 for(i = 0; i < LENGTH(keys); i++)
1007 if(keysym == keys[i].keysym
1008 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1009 {
1010 if(keys[i].func)
1011 keys[i].func(keys[i].arg);
1012 }
1013}
1014
1015void
1016killclient(const char *arg) {
1017 XEvent ev;
1018
1019 if(!sel)
1020 return;
1021 if(isprotodel(sel)) {
1022 ev.type = ClientMessage;
1023 ev.xclient.window = sel->win;
1024 ev.xclient.message_type = wmatom[WMProtocols];
1025 ev.xclient.format = 32;
1026 ev.xclient.data.l[0] = wmatom[WMDelete];
1027 ev.xclient.data.l[1] = CurrentTime;
1028 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1029 }
1030 else
1031 XKillClient(dpy, sel->win);
1032}
1033
1034void
1035manage(Window w, XWindowAttributes *wa) {
1036 Client *c, *t = NULL;
1037 View *v;
1038 Status rettrans;
1039 Window trans;
1040 XWindowChanges wc;
1041
1042 c = emallocz(sizeof(Client));
1043 c->tags = emallocz(TAGSZ);
1044 c->win = w;
1045
1046 applyrules(c);
1047
1048 v = c->view;
1049
1050 c->x = wa->x + v->x;
1051 c->y = wa->y + v->y;
1052 c->w = wa->width;
1053 c->h = wa->height;
1054 c->oldborder = wa->border_width;
1055
1056 if(c->w == v->w && c->h == v->h) {
1057 c->x = v->x;
1058 c->y = v->y;
1059 c->border = wa->border_width;
1060 }
1061 else {
1062 if(c->x + c->w + 2 * c->border > v->wax + v->waw)
1063 c->x = v->wax + v->waw - c->w - 2 * c->border;
1064 if(c->y + c->h + 2 * c->border > v->way + v->wah)
1065 c->y = v->way + v->wah - c->h - 2 * c->border;
1066 if(c->x < v->wax)
1067 c->x = v->wax;
1068 if(c->y < v->way)
1069 c->y = v->way;
1070 c->border = BORDERPX;
1071 }
1072 wc.border_width = c->border;
1073 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1074 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1075 configure(c); /* propagates border_width, if size doesn't change */
1076 updatesizehints(c);
1077 XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1078 grabbuttons(c, False);
1079 updatetitle(c);
1080 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1081 for(t = clients; t && t->win != trans; t = t->next);
1082 if(t)
1083 memcpy(c->tags, t->tags, TAGSZ);
1084 if(!c->isfloating)
1085 c->isfloating = (rettrans == Success) || c->isfixed;
1086 attach(c);
1087 attachstack(c);
1088 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1089 ban(c);
1090 XMapWindow(dpy, c->win);
1091 setclientstate(c, NormalState);
1092 arrange();
1093}
1094
1095void
1096mappingnotify(XEvent *e) {
1097 XMappingEvent *ev = &e->xmapping;
1098
1099 XRefreshKeyboardMapping(ev);
1100 if(ev->request == MappingKeyboard)
1101 grabkeys();
1102}
1103
1104void
1105maprequest(XEvent *e) {
1106 static XWindowAttributes wa;
1107 XMapRequestEvent *ev = &e->xmaprequest;
1108
1109 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1110 return;
1111 if(wa.override_redirect)
1112 return;
1113 if(!getclient(ev->window))
1114 manage(ev->window, &wa);
1115}
1116
1117void
1118movemouse(Client *c) {
1119 int x1, y1, ocx, ocy, di, nx, ny;
1120 unsigned int dui;
1121 View *v;
1122 Window dummy;
1123 XEvent ev;
1124
1125 ocx = nx = c->x;
1126 ocy = ny = c->y;
1127 v = c->view;
1128 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1129 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1130 return;
1131 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1132 for(;;) {
1133 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1134 switch (ev.type) {
1135 case ButtonRelease:
1136 XUngrabPointer(dpy, CurrentTime);
1137 return;
1138 case ConfigureRequest:
1139 case Expose:
1140 case MapRequest:
1141 handler[ev.type](&ev);
1142 break;
1143 case MotionNotify:
1144 XSync(dpy, False);
1145 nx = ocx + (ev.xmotion.x - x1);
1146 ny = ocy + (ev.xmotion.y - y1);
1147 if(abs(v->wax - nx) < SNAP)
1148 nx = v->wax;
1149 else if(abs((v->wax + v->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1150 nx = v->wax + v->waw - c->w - 2 * c->border;
1151 if(abs(v->way - ny) < SNAP)
1152 ny = v->way;
1153 else if(abs((v->way + v->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1154 ny = v->way + v->wah - c->h - 2 * c->border;
1155 if(!c->isfloating && (v->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1156 togglefloating(NULL);
1157 if((v->layout->arrange == floating) || c->isfloating)
1158 resize(c, nx, ny, c->w, c->h, False);
1159 break;
1160 }
1161 }
1162}
1163
1164Client *
1165nexttiled(Client *c, View *v) {
1166 for(; c && (c->isfloating || c->view != v || !isvisible(c)); c = c->next);
1167 return c;
1168}
1169
1170void
1171propertynotify(XEvent *e) {
1172 Client *c;
1173 Window trans;
1174 XPropertyEvent *ev = &e->xproperty;
1175
1176 if(ev->state == PropertyDelete)
1177 return; /* ignore */
1178 if((c = getclient(ev->window))) {
1179 switch (ev->atom) {
1180 default: break;
1181 case XA_WM_TRANSIENT_FOR:
1182 XGetTransientForHint(dpy, c->win, &trans);
1183 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1184 arrange();
1185 break;
1186 case XA_WM_NORMAL_HINTS:
1187 updatesizehints(c);
1188 break;
1189 case XA_WM_HINTS:
1190 updatewmhints(c);
1191 drawbar(c->view);
1192 break;
1193 }
1194 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1195 updatetitle(c);
1196 if(c == sel)
1197 drawbar(selview);
1198 }
1199 }
1200}
1201
1202void
1203quit(const char *arg) {
1204 readin = running = False;
1205}
1206
1207void
1208reapply(const char *arg) {
1209 static Bool zerotags[LENGTH(tags)] = { 0 };
1210 Client *c;
1211
1212 for(c = clients; c; c = c->next) {
1213 memcpy(c->tags, zerotags, sizeof zerotags);
1214 applyrules(c);
1215 }
1216 arrange();
1217}
1218
1219void
1220resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1221 View *v;
1222 XWindowChanges wc;
1223
1224 v = c->view;
1225 if(sizehints) {
1226 /* set minimum possible */
1227 if (w < 1)
1228 w = 1;
1229 if (h < 1)
1230 h = 1;
1231
1232 /* temporarily remove base dimensions */
1233 w -= c->basew;
1234 h -= c->baseh;
1235
1236 /* adjust for aspect limits */
1237 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1238 if (w * c->maxay > h * c->maxax)
1239 w = h * c->maxax / c->maxay;
1240 else if (w * c->minay < h * c->minax)
1241 h = w * c->minay / c->minax;
1242 }
1243
1244 /* adjust for increment value */
1245 if(c->incw)
1246 w -= w % c->incw;
1247 if(c->inch)
1248 h -= h % c->inch;
1249
1250 /* restore base dimensions */
1251 w += c->basew;
1252 h += c->baseh;
1253
1254 if(c->minw > 0 && w < c->minw)
1255 w = c->minw;
1256 if(c->minh > 0 && h < c->minh)
1257 h = c->minh;
1258 if(c->maxw > 0 && w > c->maxw)
1259 w = c->maxw;
1260 if(c->maxh > 0 && h > c->maxh)
1261 h = c->maxh;
1262 }
1263 if(w <= 0 || h <= 0)
1264 return;
1265 if(x > v->x + v->w)
1266 x = v->w - w - 2 * c->border;
1267 if(y > v->y + v->h)
1268 y = v->h - h - 2 * c->border;
1269 if(x + w + 2 * c->border < v->x)
1270 x = v->x;
1271 if(y + h + 2 * c->border < v->y)
1272 y = v->y;
1273 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1274 c->x = wc.x = x;
1275 c->y = wc.y = y;
1276 c->w = wc.width = w;
1277 c->h = wc.height = h;
1278 wc.border_width = c->border;
1279 XConfigureWindow(dpy, c->win,
1280 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1281 configure(c);
1282 XSync(dpy, False);
1283 }
1284}
1285
1286void
1287resizemouse(Client *c) {
1288 int ocx, ocy;
1289 int nw, nh;
1290 View *v;
1291 XEvent ev;
1292
1293 ocx = c->x;
1294 ocy = c->y;
1295 v = c->view;
1296 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1297 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1298 return;
1299 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1300 for(;;) {
1301 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1302 switch(ev.type) {
1303 case ButtonRelease:
1304 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1305 c->w + c->border - 1, c->h + c->border - 1);
1306 XUngrabPointer(dpy, CurrentTime);
1307 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1308 return;
1309 case ConfigureRequest:
1310 case Expose:
1311 case MapRequest:
1312 handler[ev.type](&ev);
1313 break;
1314 case MotionNotify:
1315 XSync(dpy, False);
1316 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1317 nw = 1;
1318 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1319 nh = 1;
1320 if(!c->isfloating && (v->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1321 togglefloating(NULL);
1322 if((v->layout->arrange == floating) || c->isfloating)
1323 resize(c, c->x, c->y, nw, nh, True);
1324 break;
1325 }
1326 }
1327}
1328
1329void
1330restack(View *v) {
1331 Client *c;
1332 XEvent ev;
1333 XWindowChanges wc;
1334
1335 drawbar(v);
1336 if(!sel)
1337 return;
1338 if(sel->isfloating || (v->layout->arrange == floating))
1339 XRaiseWindow(dpy, sel->win);
1340 if(v->layout->arrange != floating) {
1341 wc.stack_mode = Below;
1342 wc.sibling = v->barwin;
1343 if(!sel->isfloating) {
1344 XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1345 wc.sibling = sel->win;
1346 }
1347 for(c = nexttiled(clients, v); c; c = nexttiled(c->next, v)) {
1348 if(c == sel)
1349 continue;
1350 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1351 wc.sibling = c->win;
1352 }
1353 }
1354 XSync(dpy, False);
1355 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1356}
1357
1358void
1359run(void) {
1360 char *p;
1361 char sbuf[sizeof stext];
1362 fd_set rd;
1363 int r, xfd;
1364 unsigned int len, offset;
1365 XEvent ev;
1366
1367 /* main event loop, also reads status text from stdin */
1368 XSync(dpy, False);
1369 xfd = ConnectionNumber(dpy);
1370 readin = True;
1371 offset = 0;
1372 len = sizeof stext - 1;
1373 sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1374 while(running) {
1375 FD_ZERO(&rd);
1376 if(readin)
1377 FD_SET(STDIN_FILENO, &rd);
1378 FD_SET(xfd, &rd);
1379 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1380 if(errno == EINTR)
1381 continue;
1382 eprint("select failed\n");
1383 }
1384 if(FD_ISSET(STDIN_FILENO, &rd)) {
1385 switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1386 case -1:
1387 strncpy(stext, strerror(errno), len);
1388 readin = False;
1389 break;
1390 case 0:
1391 strncpy(stext, "EOF", 4);
1392 readin = False;
1393 break;
1394 default:
1395 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1396 if(*p == '\n' || *p == '\0') {
1397 *p = '\0';
1398 strncpy(stext, sbuf, len);
1399 p += r - 1; /* p is sbuf + offset + r - 1 */
1400 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1401 offset = r;
1402 if(r)
1403 memmove(sbuf, p - r + 1, r);
1404 break;
1405 }
1406 break;
1407 }
1408 drawbar(selview);
1409 }
1410 while(XPending(dpy)) {
1411 XNextEvent(dpy, &ev);
1412 if(handler[ev.type])
1413 (handler[ev.type])(&ev); /* call handler */
1414 }
1415 }
1416}
1417
1418void
1419scan(void) {
1420 unsigned int i, num;
1421 Window *wins, d1, d2;
1422 XWindowAttributes wa;
1423
1424 wins = NULL;
1425 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1426 for(i = 0; i < num; i++) {
1427 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1428 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1429 continue;
1430 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1431 manage(wins[i], &wa);
1432 }
1433 for(i = 0; i < num; i++) { /* now the transients */
1434 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1435 continue;
1436 if(XGetTransientForHint(dpy, wins[i], &d1)
1437 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1438 manage(wins[i], &wa);
1439 }
1440 }
1441 if(wins)
1442 XFree(wins);
1443}
1444
1445void
1446setclientstate(Client *c, long state) {
1447 long data[] = {state, None};
1448
1449 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1450 PropModeReplace, (unsigned char *)data, 2);
1451}
1452
1453void
1454setlayout(const char *arg) {
1455 unsigned int i;
1456 View *v = selview;
1457
1458 if(!arg) {
1459 v->layout++;
1460 if(v->layout == &layouts[LENGTH(layouts)])
1461 v->layout = &layouts[0];
1462 }
1463 else {
1464 for(i = 0; i < LENGTH(layouts); i++)
1465 if(!strcmp(arg, layouts[i].symbol))
1466 break;
1467 if(i == LENGTH(layouts))
1468 return;
1469 v->layout = &layouts[i];
1470 }
1471 if(sel)
1472 arrange();
1473 else
1474 drawbar(selview);
1475}
1476
1477void
1478setmwfact(const char *arg) {
1479 double delta;
1480 View *v = selview;
1481
1482 if(!domwfact)
1483 return;
1484 /* arg handling, manipulate mwfact */
1485 if(arg == NULL)
1486 v->mwfact = MWFACT;
1487 else if(sscanf(arg, "%lf", &delta) == 1) {
1488 if(arg[0] == '+' || arg[0] == '-')
1489 v->mwfact += delta;
1490 else
1491 v->mwfact = delta;
1492 if(v->mwfact < 0.1)
1493 v->mwfact = 0.1;
1494 else if(v->mwfact > 0.9)
1495 v->mwfact = 0.9;
1496 }
1497 arrange();
1498}
1499
1500void
1501setup(void) {
1502 unsigned int i, j;
1503 View *v;
1504 XSetWindowAttributes wa;
1505 XineramaScreenInfo *info = NULL;
1506
1507 /* init atoms */
1508 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1509 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1510 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1511 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1512 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1513 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1514
1515 /* init cursors */
1516 wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1517 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1518 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1519
1520 if(XineramaIsActive(dpy))
1521 info = XineramaQueryScreens(dpy, &nviews);
1522
1523#if defined(AIM_XINERAMA)
1524nviews = 2; /* aim Xinerama */
1525#endif
1526 views = emallocz(nviews * sizeof(View));
1527
1528 screen = DefaultScreen(dpy);
1529 root = RootWindow(dpy, screen);
1530
1531 /* init appearance */
1532 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1533 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1534 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1535 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1536 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1537 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1538 initfont(FONT);
1539 dc.h = bh = dc.font.height + 2;
1540 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1541 dc.gc = XCreateGC(dpy, root, 0, 0);
1542 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1543 if(!dc.font.set)
1544 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1545
1546 for(blw = i = 0; i < LENGTH(layouts); i++) {
1547 i = textw(layouts[i].symbol);
1548 if(i > blw)
1549 blw = i;
1550 }
1551
1552 seltags = emallocz(TAGSZ);
1553 prevtags = emallocz(TAGSZ);
1554
1555 /* check, if vtags need assistance, because there is only 1 view */
1556 if(nviews == 1)
1557 for(i = 0; i < LENGTH(tags); i++)
1558 vtags[i] = 0;
1559
1560 for(i = 0; i < nviews; i++) {
1561 /* init geometry */
1562 v = &views[i];
1563
1564 /* select first tag in each view */
1565 for(j = 0; j < LENGTH(tags); j++)
1566 if(vtags[j] == i) {
1567 seltags[j] = prevtags[j] = True;
1568 break;
1569 }
1570
1571
1572 if(info) {
1573
1574#if defined(AIM_XINERAMA)
1575v->w = DisplayWidth(dpy, screen) / 2;
1576v->x = (i == 0) ? 0 : v->w;
1577v->y = 0;
1578v->h = DisplayHeight(dpy, screen);
1579#else
1580 v->x = info[i].x_org;
1581 v->y = info[i].y_org;
1582 v->w = info[i].width;
1583 v->h = info[i].height;
1584#endif
1585 }
1586 else {
1587 v->x = 0;
1588 v->y = 0;
1589 v->w = DisplayWidth(dpy, screen);
1590 v->h = DisplayHeight(dpy, screen);
1591 }
1592
1593 /* init layouts */
1594 v->mwfact = MWFACT;
1595 v->layout = &layouts[0];
1596
1597 // TODO: bpos per screen?
1598 bpos = BARPOS;
1599 wa.override_redirect = 1;
1600 wa.background_pixmap = ParentRelative;
1601 wa.event_mask = ButtonPressMask|ExposureMask;
1602
1603 /* init bars */
1604 v->barwin = XCreateWindow(dpy, root, v->x, v->y, v->w, bh, 0,
1605 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1606 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1607 XDefineCursor(dpy, v->barwin, cursor[CurNormal]);
1608 updatebarpos(v);
1609 XMapRaised(dpy, v->barwin);
1610 strcpy(stext, "dwm-"VERSION);
1611
1612 /* EWMH support per view */
1613 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1614 PropModeReplace, (unsigned char *) netatom, NetLast);
1615
1616 /* select for events */
1617 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1618 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1619 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1620 XSelectInput(dpy, root, wa.event_mask);
1621
1622 drawbar(v);
1623 }
1624 if(info)
1625 XFree(info);
1626
1627 selview = viewat();
1628
1629 /* grab keys */
1630 grabkeys();
1631}
1632
1633void
1634spawn(const char *arg) {
1635 static char *shell = NULL;
1636
1637 if(!shell && !(shell = getenv("SHELL")))
1638 shell = "/bin/sh";
1639 if(!arg)
1640 return;
1641 /* The double-fork construct avoids zombie processes and keeps the code
1642 * clean from stupid signal handlers. */
1643 if(fork() == 0) {
1644 if(fork() == 0) {
1645 if(dpy)
1646 close(ConnectionNumber(dpy));
1647 setsid();
1648 execl(shell, shell, "-c", arg, (char *)NULL);
1649 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1650 perror(" failed");
1651 }
1652 exit(0);
1653 }
1654 wait(0);
1655}
1656
1657void
1658tag(const char *arg) {
1659 unsigned int i;
1660
1661 if(!sel)
1662 return;
1663 for(i = 0; i < LENGTH(tags); i++)
1664 sel->tags[i] = (NULL == arg);
1665 sel->tags[idxoftag(arg)] = True;
1666 arrange();
1667}
1668
1669unsigned int
1670textnw(const char *text, unsigned int len) {
1671 XRectangle r;
1672
1673 if(dc.font.set) {
1674 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1675 return r.width;
1676 }
1677 return XTextWidth(dc.font.xfont, text, len);
1678}
1679
1680unsigned int
1681textw(const char *text) {
1682 return textnw(text, strlen(text)) + dc.font.height;
1683}
1684
1685void
1686tile(View *v) {
1687 unsigned int i, n, nx, ny, nw, nh, mw, th;
1688 Client *c, *mc;
1689
1690 domwfact = dozoom = True;
1691 nx = v->wax;
1692 ny = v->way;
1693 nw = 0;
1694 for(n = 0, c = nexttiled(clients, v); c; c = nexttiled(c->next, v))
1695 n++;
1696
1697 /* window geoms */
1698 mw = (n == 1) ? v->waw : v->mwfact * v->waw;
1699 th = (n > 1) ? v->wah / (n - 1) : 0;
1700 if(n > 1 && th < bh)
1701 th = v->wah;
1702
1703 for(i = 0, c = mc = nexttiled(clients, v); c; c = nexttiled(c->next, v)) {
1704 if(i == 0) { /* master */
1705 nw = mw - 2 * c->border;
1706 nh = v->wah - 2 * c->border;
1707 }
1708 else { /* tile window */
1709 if(i == 1) {
1710 ny = v->way;
1711 nx += mc->w + 2 * mc->border;
1712 nw = v->waw - mw - 2 * c->border;
1713 }
1714 if(i + 1 == n) /* remainder */
1715 nh = (v->way + v->wah) - ny - 2 * c->border;
1716 else
1717 nh = th - 2 * c->border;
1718 }
1719 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1720 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1721 /* client doesn't accept size constraints */
1722 resize(c, nx, ny, nw, nh, False);
1723 if(n > 1 && th != v->wah)
1724 ny = c->y + c->h + 2 * c->border;
1725 i++;
1726 }
1727}
1728
1729void
1730togglebar(const char *arg) {
1731 if(bpos == BarOff)
1732 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1733 else
1734 bpos = BarOff;
1735 updatebarpos(selview);
1736 arrange();
1737}
1738
1739void
1740togglefloating(const char *arg) {
1741 if(!sel)
1742 return;
1743 sel->isfloating = !sel->isfloating;
1744 if(sel->isfloating)
1745 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1746 arrange();
1747}
1748
1749void
1750toggletag(const char *arg) {
1751 unsigned int i, j;
1752
1753 if(!sel)
1754 return;
1755 i = idxoftag(arg);
1756 sel->tags[i] = !sel->tags[i];
1757 for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1758 if(j == LENGTH(tags))
1759 sel->tags[i] = True; /* at least one tag must be enabled */
1760 arrange();
1761}
1762
1763void
1764toggleview(const char *arg) {
1765 unsigned int i, j;
1766
1767 i = idxoftag(arg);
1768 seltags[i] = !seltags[i];
1769 for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1770 if(j == LENGTH(tags))
1771 seltags[i] = True; /* at least one tag must be viewed */
1772 arrange();
1773}
1774
1775void
1776unban(Client *c) {
1777 if(!c->isbanned)
1778 return;
1779 XMoveWindow(dpy, c->win, c->x, c->y);
1780 c->isbanned = False;
1781}
1782
1783void
1784unmanage(Client *c) {
1785 XWindowChanges wc;
1786
1787 wc.border_width = c->oldborder;
1788 /* The server grab construct avoids race conditions. */
1789 XGrabServer(dpy);
1790 XSetErrorHandler(xerrordummy);
1791 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1792 detach(c);
1793 detachstack(c);
1794 if(sel == c)
1795 focus(NULL);
1796 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1797 setclientstate(c, WithdrawnState);
1798 free(c->tags);
1799 free(c);
1800 XSync(dpy, False);
1801 XSetErrorHandler(xerror);
1802 XUngrabServer(dpy);
1803 arrange();
1804}
1805
1806void
1807unmapnotify(XEvent *e) {
1808 Client *c;
1809 XUnmapEvent *ev = &e->xunmap;
1810
1811 if((c = getclient(ev->window)))
1812 unmanage(c);
1813}
1814
1815void
1816updatebarpos(View *v) {
1817 XEvent ev;
1818
1819 v->wax = v->x;
1820 v->way = v->y;
1821 v->wah = v->h;
1822 v->waw = v->w;
1823 switch(bpos) {
1824 default:
1825 v->wah -= bh;
1826 v->way += bh;
1827 XMoveWindow(dpy, v->barwin, v->x, v->y);
1828 break;
1829 case BarBot:
1830 v->wah -= bh;
1831 XMoveWindow(dpy, v->barwin, v->x, v->y + v->wah);
1832 break;
1833 case BarOff:
1834 XMoveWindow(dpy, v->barwin, v->x, v->y - bh);
1835 break;
1836 }
1837 XSync(dpy, False);
1838 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1839}
1840
1841void
1842updatesizehints(Client *c) {
1843 long msize;
1844 XSizeHints size;
1845
1846 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1847 size.flags = PSize;
1848 c->flags = size.flags;
1849 if(c->flags & PBaseSize) {
1850 c->basew = size.base_width;
1851 c->baseh = size.base_height;
1852 }
1853 else if(c->flags & PMinSize) {
1854 c->basew = size.min_width;
1855 c->baseh = size.min_height;
1856 }
1857 else
1858 c->basew = c->baseh = 0;
1859 if(c->flags & PResizeInc) {
1860 c->incw = size.width_inc;
1861 c->inch = size.height_inc;
1862 }
1863 else
1864 c->incw = c->inch = 0;
1865 if(c->flags & PMaxSize) {
1866 c->maxw = size.max_width;
1867 c->maxh = size.max_height;
1868 }
1869 else
1870 c->maxw = c->maxh = 0;
1871 if(c->flags & PMinSize) {
1872 c->minw = size.min_width;
1873 c->minh = size.min_height;
1874 }
1875 else if(c->flags & PBaseSize) {
1876 c->minw = size.base_width;
1877 c->minh = size.base_height;
1878 }
1879 else
1880 c->minw = c->minh = 0;
1881 if(c->flags & PAspect) {
1882 c->minax = size.min_aspect.x;
1883 c->maxax = size.max_aspect.x;
1884 c->minay = size.min_aspect.y;
1885 c->maxay = size.max_aspect.y;
1886 }
1887 else
1888 c->minax = c->maxax = c->minay = c->maxay = 0;
1889 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1890 && c->maxw == c->minw && c->maxh == c->minh);
1891}
1892
1893void
1894updatetitle(Client *c) {
1895 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1896 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1897}
1898
1899void
1900updatewmhints(Client *c) {
1901 XWMHints *wmh;
1902
1903 if((wmh = XGetWMHints(dpy, c->win))) {
1904 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1905 XFree(wmh);
1906 }
1907}
1908
1909void
1910view(const char *arg) {
1911 unsigned int i;
1912 Bool tmp[LENGTH(tags)];
1913
1914 for(i = 0; i < LENGTH(tags); i++)
1915 tmp[i] = (NULL == arg);
1916 tmp[idxoftag(arg)] = True;
1917
1918 if(memcmp(seltags, tmp, TAGSZ) != 0) {
1919 memcpy(prevtags, seltags, TAGSZ);
1920 memcpy(seltags, tmp, TAGSZ);
1921 arrange();
1922 }
1923}
1924
1925View *
1926viewat() {
1927 int i, x, y;
1928 Window win;
1929 unsigned int mask;
1930
1931 XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1932 for(i = 0; i < nviews; i++) {
1933 if((x >= views[i].x && x < views[i].x + views[i].w)
1934 && (y >= views[i].y && y < views[i].y + views[i].h))
1935 return &views[i];
1936 }
1937 return NULL;
1938}
1939
1940void
1941viewprevtag(const char *arg) {
1942 static Bool tmp[LENGTH(tags)];
1943
1944 memcpy(tmp, seltags, TAGSZ);
1945 memcpy(seltags, prevtags, TAGSZ);
1946 memcpy(prevtags, tmp, TAGSZ);
1947 arrange();
1948}
1949
1950/* There's no way to check accesses to destroyed windows, thus those cases are
1951 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1952 * default error handler, which may call exit. */
1953int
1954xerror(Display *dpy, XErrorEvent *ee) {
1955 if(ee->error_code == BadWindow
1956 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1957 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1958 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1959 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1960 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1961 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1962 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1963 return 0;
1964 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1965 ee->request_code, ee->error_code);
1966 return xerrorxlib(dpy, ee); /* may call exit */
1967}
1968
1969int
1970xerrordummy(Display *dpy, XErrorEvent *ee) {
1971 return 0;
1972}
1973
1974/* Startup Error handler to check if another window manager
1975 * is already running. */
1976int
1977xerrorstart(Display *dpy, XErrorEvent *ee) {
1978 otherwm = True;
1979 return -1;
1980}
1981
1982void
1983zoom(const char *arg) {
1984 Client *c = sel;
1985
1986 if(!sel || !dozoom || sel->isfloating)
1987 return;
1988 if(c == nexttiled(clients, c->view))
1989 if(!(c = nexttiled(c->next, c->view)))
1990 return;
1991 detach(c);
1992 attach(c);
1993 focus(c);
1994 arrange();
1995}
1996
1997int
1998main(int argc, char *argv[]) {
1999 if(argc == 2 && !strcmp("-v", argv[1]))
2000 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
2001 else if(argc != 1)
2002 eprint("usage: dwm [-v]\n");
2003
2004 setlocale(LC_CTYPE, "");
2005 if(!(dpy = XOpenDisplay(0)))
2006 eprint("dwm: cannot open display\n");
2007
2008 checkotherwm();
2009 setup();
2010 scan();
2011 run();
2012 cleanup();
2013
2014 XCloseDisplay(dpy);
2015 return 0;
2016}