dwm.c

   1 /* See LICENSE file for copyright and license details.
   2  *
   3  * dynamic window manager is designed like any other X client as well. It is
   4  * driven through handling X events. In contrast to other X clients, a window
   5  * manager selects for SubstructureRedirectMask on the root window, to receive
   6  * events about window (dis-)appearance.  Only one X connection at a time is
   7  * allowed to select for this event mask.
   8  *
   9  * Calls to fetch an X event from the event queue are blocking.  Due reading
  10  * status text from standard input, a select()-driven main loop has been
  11  * implemented which selects for reads on the X connection and STDIN_FILENO to
  12  * handle all data smoothly. The event handlers of dwm are organized in an
  13  * array which is accessed whenever a new event has been fetched. This allows
  14  * event dispatching in O(1) time.
  15  *
  16  * Each child of the root window is called a client, except windows which have
  17  * set the override_redirect flag.  Clients are organized in a global
  18  * doubly-linked client list, the focus history is remembered through a global
  19  * stack list. Each client contains a bit array to indicate the tags of a
  20  * client.
  21  *
  22  * Keys and tagging rules are organized as arrays and defined in config.h.
  23  *
  24  * To understand everything else, start reading main().
  25  */
  26 #include <errno.h>
  27 #include <locale.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <sys/select.h>
  34 #include <sys/types.h>
  35 #include <sys/wait.h>
  36 #include <X11/cursorfont.h>
  37 #include <X11/keysym.h>
  38 #include <X11/Xatom.h>
  39 #include <X11/Xlib.h>
  40 #include <X11/Xproto.h>
  41 #include <X11/Xutil.h>
  42 #ifdef XINERAMA
  43 #include <X11/extensions/Xinerama.h>
  44 #endif
  45
  46 /* macros */
  47 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  48 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask))
  49 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  50 #define ISVISIBLE(x)            (x->tags & tagset[seltags])
  51 #define LENGTH(x)               (sizeof x / sizeof x[0])
  52 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  53 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  54 #define MAXTAGLEN               16
  55 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  56 #define TAGMASK                 ((int)((1LL << LENGTH(tags)) - 1))
  57 #define TEXTW(x)                (textnw(x, strlen(x)) + dc.font.height)
  58
  59 /* enums */
  60 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
  61 enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
  62 enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
  63 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
  64 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  65        ClkClientWin, ClkRootWin, ClkLast };             /* clicks */
  66
  67 typedef union {
  68         int i;
  69         unsigned int ui;
  70         float f;
  71         void *v;
  72 } Arg;
  73
  74 typedef struct {
  75         unsigned int click;
  76         unsigned int mask;
  77         unsigned int button;
  78         void (*func)(const Arg *arg);
  79         const Arg arg;
  80 } Button;
  81
  82 typedef struct Client Client;
  83 struct Client {
  84         char name[256];
  85         float mina, maxa;
  86         int x, y, w, h;
  87         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  88         int bw, oldbw;
  89         unsigned int tags;
  90         Bool isfixed, isfloating, isurgent;
  91         Client *next;
  92         Client *snext;
  93         Window win;
  94 };
  95
  96 typedef 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
 111 typedef struct {
 112         unsigned int mod;
 113         KeySym keysym;
 114         void (*func)(const Arg *);
 115         const Arg arg;
 116 } Key;
 117
 118 typedef struct {
 119         const char *symbol;
 120         void (*arrange)(void);
 121 } Layout;
 122
 123 typedef struct {
 124         const char *class;
 125         const char *instance;
 126         const char *title;
 127         unsigned int tags;
 128         Bool isfloating;
 129 } Rule;
 130
 131 /* function declarations */
 132 static void applyrules(Client *c);
 133 static void arrange(void);
 134 static void attach(Client *c);
 135 static void attachstack(Client *c);
 136 static void buttonpress(XEvent *e);
 137 static void checkotherwm(void);
 138 static void cleanup(void);
 139 static void clearurgent(void);
 140 static void configure(Client *c);
 141 static void configurenotify(XEvent *e);
 142 static void configurerequest(XEvent *e);
 143 static void destroynotify(XEvent *e);
 144 static void detach(Client *c);
 145 static void detachstack(Client *c);
 146 static void die(const char *errstr, ...);
 147 static void drawbar(void);
 148 static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
 149 static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
 150 static void enternotify(XEvent *e);
 151 static void expose(XEvent *e);
 152 static void focus(Client *c);
 153 static void focusin(XEvent *e);
 154 static void focusstack(const Arg *arg);
 155 static Client *getclient(Window w);
 156 static unsigned long getcolor(const char *colstr);
 157 static long getstate(Window w);
 158 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 159 static void grabbuttons(Client *c, Bool focused);
 160 static void grabkeys(void);
 161 static void initfont(const char *fontstr);
 162 static Bool isprotodel(Client *c);
 163 static void keypress(XEvent *e);
 164 static void killclient(const Arg *arg);
 165 static void manage(Window w, XWindowAttributes *wa);
 166 static void mappingnotify(XEvent *e);
 167 static void maprequest(XEvent *e);
 168 static void monocle(void);
 169 static void movemouse(const Arg *arg);
 170 static Client *nexttiled(Client *c);
 171 static void propertynotify(XEvent *e);
 172 static void quit(const Arg *arg);
 173 static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
 174 static void resizemouse(const Arg *arg);
 175 static void restack(void);
 176 static void run(void);
 177 static void scan(void);
 178 static void setclientstate(Client *c, long state);
 179 static void setlayout(const Arg *arg);
 180 static void setmfact(const Arg *arg);
 181 static void setup(void);
 182 static void spawn(const Arg *arg);
 183 static void tag(const Arg *arg);
 184 static int textnw(const char *text, unsigned int len);
 185 static void tile(void);
 186 static void togglebar(const Arg *arg);
 187 static void togglefloating(const Arg *arg);
 188 static void toggletag(const Arg *arg);
 189 static void toggleview(const Arg *arg);
 190 static void unmanage(Client *c);
 191 static void unmapnotify(XEvent *e);
 192 static void updatebar(void);
 193 static void updategeom(void);
 194 static void updatesizehints(Client *c);
 195 static void updatetitle(Client *c);
 196 static void updatewmhints(Client *c);
 197 static void view(const Arg *arg);
 198 static int xerror(Display *dpy, XErrorEvent *ee);
 199 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 200 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 201 static void zoom(const Arg *arg);
 202
 203 /* variables */
 204 static char stext[256];
 205 static int screen;
 206 static int sx, sy, sw, sh; /* display geometry x, y, width, height */
 207 static int by, bh, blw;    /* bar geometry y, height and layout symbol width */
 208 static int wx, wy, ww, wh; /* window area geometry x, y, width, height, bar excluded */
 209 static unsigned int seltags = 0, sellt = 0;
 210 static int (*xerrorxlib)(Display *, XErrorEvent *);
 211 static unsigned int numlockmask = 0;
 212 static void (*handler[LASTEvent]) (XEvent *) = {
 213         [ButtonPress] = buttonpress,
 214         [ConfigureRequest] = configurerequest,
 215         [ConfigureNotify] = configurenotify,
 216         [DestroyNotify] = destroynotify,
 217         [EnterNotify] = enternotify,
 218         [Expose] = expose,
 219         [FocusIn] = focusin,
 220         [KeyPress] = keypress,
 221         [MappingNotify] = mappingnotify,
 222         [MapRequest] = maprequest,
 223         [PropertyNotify] = propertynotify,
 224         [UnmapNotify] = unmapnotify
 225 };
 226 static Atom wmatom[WMLast], netatom[NetLast];
 227 static Bool otherwm;
 228 static Bool running = True;
 229 static unsigned int tagset[] = {1, 1}; /* after start, first tag is selected */
 230 static Client *clients = NULL;
 231 static Client *sel = NULL;
 232 static Client *stack = NULL;
 233 static Cursor cursor[CurLast];
 234 static Display *dpy;
 235 static DC dc = {0};
 236 static Layout *lt[] = { NULL, NULL };
 237 static Window root, barwin;
 238 /* configuration, allows nested code to access above variables */
 239 #include "config.h"
 240
 241 /* compile-time check if all tags fit into an unsigned int bit array. */
 242 struct NumTags { char limitexceeded[sizeof(unsigned int) * 8 < LENGTH(tags) ? -1 : 1]; };
 243
 244 /* function implementations */
 245 void
 246 applyrules(Client *c) {
 247         unsigned int i;
 248         Rule *r;
 249         XClassHint ch = { 0 };
 250
 251         /* rule matching */
 252         XGetClassHint(dpy, c->win, &ch);
 253         for(i = 0; i < LENGTH(rules); i++) {
 254                 r = &rules[i];
 255                 if((!r->title || strstr(c->name, r->title))
 256                 && (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
 257                 && (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
 258                         c->isfloating = r->isfloating;
 259                         c->tags |= r->tags & TAGMASK;
 260                 }
 261         }
 262         if(ch.res_class)
 263                 XFree(ch.res_class);
 264         if(ch.res_name)
 265                 XFree(ch.res_name);
 266         if(!c->tags)
 267                 c->tags = tagset[seltags];
 268 }
 269
 270 void
 271 arrange(void) {
 272         Client *c;
 273
 274         for(c = clients; c; c = c->next)
 275                 if(ISVISIBLE(c)) {
 276                         XMoveWindow(dpy, c->win, c->x, c->y);
 277                         if(!lt[sellt]->arrange || c->isfloating)
 278                                 resize(c, c->x, c->y, c->w, c->h, True);
 279                 }
 280                 else {
 281                         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 282                 }
 283
 284         focus(NULL);
 285         if(lt[sellt]->arrange)
 286                 lt[sellt]->arrange();
 287         restack();
 288 }
 289
 290 void
 291 attach(Client *c) {
 292         c->next = clients;
 293         clients = c;
 294 }
 295
 296 void
 297 attachstack(Client *c) {
 298         c->snext = stack;
 299         stack = c;
 300 }
 301
 302 void
 303 buttonpress(XEvent *e) {
 304         unsigned int i, x, click;
 305         Arg arg = {0};
 306         Client *c;
 307         XButtonPressedEvent *ev = &e->xbutton;
 308
 309         click = ClkRootWin;
 310         if(ev->window == barwin) {
 311                 i = x = 0;
 312                 do x += TEXTW(tags[i]); while(ev->x >= x && ++i < LENGTH(tags));
 313                 if(i < LENGTH(tags)) {
 314                         click = ClkTagBar;
 315                         arg.ui = 1 << i;
 316                 }
 317                 else if(ev->x < x + blw)
 318                         click = ClkLtSymbol;
 319                 else if(ev->x > wx + ww - TEXTW(stext))
 320                         click = ClkStatusText;
 321                 else
 322                         click = ClkWinTitle;
 323         }
 324         else if((c = getclient(ev->window))) {
 325                 focus(c);
 326                 click = ClkClientWin;
 327         }
 328
 329         for(i = 0; i < LENGTH(buttons); i++)
 330                 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 331                    && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 332                         buttons[i].func(click == ClkTagBar ? &arg : &buttons[i].arg);
 333 }
 334
 335 void
 336 checkotherwm(void) {
 337         otherwm = False;
 338         XSetErrorHandler(xerrorstart);
 339
 340         /* this causes an error if some other window manager is running */
 341         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 342         XSync(dpy, False);
 343         if(otherwm)
 344                 die("dwm: another window manager is already running\n");
 345         XSetErrorHandler(NULL);
 346         xerrorxlib = XSetErrorHandler(xerror);
 347         XSync(dpy, False);
 348 }
 349
 350 void
 351 cleanup(void) {
 352         Arg a = {.ui = ~0};
 353         Layout foo = { "", NULL };
 354
 355         close(STDIN_FILENO);
 356         view(&a);
 357         lt[sellt] = &foo;
 358         while(stack)
 359                 unmanage(stack);
 360         if(dc.font.set)
 361                 XFreeFontSet(dpy, dc.font.set);
 362         else
 363                 XFreeFont(dpy, dc.font.xfont);
 364         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 365         XFreePixmap(dpy, dc.drawable);
 366         XFreeGC(dpy, dc.gc);
 367         XFreeCursor(dpy, cursor[CurNormal]);
 368         XFreeCursor(dpy, cursor[CurResize]);
 369         XFreeCursor(dpy, cursor[CurMove]);
 370         XDestroyWindow(dpy, barwin);
 371         XSync(dpy, False);
 372         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 373 }
 374
 375 void
 376 clearurgent(void) {
 377         XWMHints *wmh;
 378         Client *c;
 379
 380         for(c = clients; c; c = c->next)
 381                 if(ISVISIBLE(c) && c->isurgent) {
 382                         c->isurgent = False;
 383                         if (!(wmh = XGetWMHints(dpy, c->win)))
 384                                 continue;
 385
 386                         wmh->flags &= ~XUrgencyHint;
 387                         XSetWMHints(dpy, c->win, wmh);
 388                         XFree(wmh);
 389                 }
 390 }
 391
 392 void
 393 configure(Client *c) {
 394         XConfigureEvent ce;
 395
 396         ce.type = ConfigureNotify;
 397         ce.display = dpy;
 398         ce.event = c->win;
 399         ce.window = c->win;
 400         ce.x = c->x;
 401         ce.y = c->y;
 402         ce.width = c->w;
 403         ce.height = c->h;
 404         ce.border_width = c->bw;
 405         ce.above = None;
 406         ce.override_redirect = False;
 407         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 408 }
 409
 410 void
 411 configurenotify(XEvent *e) {
 412         XConfigureEvent *ev = &e->xconfigure;
 413
 414         if(ev->window == root && (ev->width != sw || ev->height != sh)) {
 415                 sw = ev->width;
 416                 sh = ev->height;
 417                 updategeom();
 418                 updatebar();
 419                 arrange();
 420         }
 421 }
 422
 423 void
 424 configurerequest(XEvent *e) {
 425         Client *c;
 426         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 427         XWindowChanges wc;
 428
 429         if((c = getclient(ev->window))) {
 430                 if(ev->value_mask & CWBorderWidth)
 431                         c->bw = ev->border_width;
 432                 else if(c->isfloating || !lt[sellt]->arrange) {
 433                         if(ev->value_mask & CWX)
 434                                 c->x = sx + ev->x;
 435                         if(ev->value_mask & CWY)
 436                                 c->y = sy + ev->y;
 437                         if(ev->value_mask & CWWidth)
 438                                 c->w = ev->width;
 439                         if(ev->value_mask & CWHeight)
 440                                 c->h = ev->height;
 441                         if((c->x - sx + c->w) > sw && c->isfloating)
 442                                 c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
 443                         if((c->y - sy + c->h) > sh && c->isfloating)
 444                                 c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
 445                         if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 446                                 configure(c);
 447                         if(ISVISIBLE(c))
 448                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 449                 }
 450                 else
 451                         configure(c);
 452         }
 453         else {
 454                 wc.x = ev->x;
 455                 wc.y = ev->y;
 456                 wc.width = ev->width;
 457                 wc.height = ev->height;
 458                 wc.border_width = ev->border_width;
 459                 wc.sibling = ev->above;
 460                 wc.stack_mode = ev->detail;
 461                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 462         }
 463         XSync(dpy, False);
 464 }
 465
 466 void
 467 destroynotify(XEvent *e) {
 468         Client *c;
 469         XDestroyWindowEvent *ev = &e->xdestroywindow;
 470
 471         if((c = getclient(ev->window)))
 472                 unmanage(c);
 473 }
 474
 475 void
 476 detach(Client *c) {
 477         Client **tc;
 478
 479         for(tc = &clients; *tc && *tc != c; tc = &(*tc)->next);
 480         *tc = c->next;
 481 }
 482
 483 void
 484 detachstack(Client *c) {
 485         Client **tc;
 486
 487         for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
 488         *tc = c->snext;
 489 }
 490
 491 void
 492 die(const char *errstr, ...) {
 493         va_list ap;
 494
 495         va_start(ap, errstr);
 496         vfprintf(stderr, errstr, ap);
 497         va_end(ap);
 498         exit(EXIT_FAILURE);
 499 }
 500
 501 void
 502 drawbar(void) {
 503         int x;
 504         unsigned int i, occ = 0, urg = 0;
 505         unsigned long *col;
 506         Client *c;
 507
 508         for(c = clients; c; c = c->next) {
 509                 occ |= c->tags;
 510                 if(c->isurgent)
 511                         urg |= c->tags;
 512         }
 513
 514         dc.x = 0;
 515         for(i = 0; i < LENGTH(tags); i++) {
 516                 dc.w = TEXTW(tags[i]);
 517                 col = tagset[seltags] & 1 << i ? dc.sel : dc.norm;
 518                 drawtext(tags[i], col, urg & 1 << i);
 519                 drawsquare(sel && sel->tags & 1 << i, occ & 1 << i, urg & 1 << i, col);
 520                 dc.x += dc.w;
 521         }
 522         if(blw > 0) {
 523                 dc.w = blw;
 524                 drawtext(lt[sellt]->symbol, dc.norm, False);
 525                 x = dc.x + dc.w;
 526         }
 527         else
 528                 x = dc.x;
 529         dc.w = TEXTW(stext);
 530         dc.x = ww - dc.w;
 531         if(dc.x < x) {
 532                 dc.x = x;
 533                 dc.w = ww - x;
 534         }
 535         drawtext(stext, dc.norm, False);
 536         if((dc.w = dc.x - x) > bh) {
 537                 dc.x = x;
 538                 if(sel) {
 539                         drawtext(sel->name, dc.sel, False);
 540                         drawsquare(sel->isfixed, sel->isfloating, False, dc.sel);
 541                 }
 542                 else
 543                         drawtext(NULL, dc.norm, False);
 544         }
 545         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0);
 546         XSync(dpy, False);
 547 }
 548
 549 void
 550 drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
 551         int x;
 552         XGCValues gcv;
 553         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 554
 555         gcv.foreground = col[invert ? ColBG : ColFG];
 556         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
 557         x = (dc.font.ascent + dc.font.descent + 2) / 4;
 558         r.x = dc.x + 1;
 559         r.y = dc.y + 1;
 560         if(filled) {
 561                 r.width = r.height = x + 1;
 562                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 563         }
 564         else if(empty) {
 565                 r.width = r.height = x;
 566                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 567         }
 568 }
 569
 570 void
 571 drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
 572         int i, x, y, h, len, olen;
 573         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 574         char buf[256];
 575
 576         XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
 577         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 578         if(!text)
 579                 return;
 580         olen = strlen(text);
 581         len = MIN(olen, sizeof buf);
 582         memcpy(buf, text, len);
 583         h = dc.font.ascent + dc.font.descent;
 584         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 585         x = dc.x + (h / 2);
 586         /* shorten text if necessary */
 587         for(; len && (i = textnw(buf, len)) > dc.w - h; len--);
 588         if(!len)
 589                 return;
 590         if(len < olen)
 591                 for(i = len; i && i > len - 3; buf[--i] = '.');
 592         XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
 593         if(dc.font.set)
 594                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 595         else
 596                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 597 }
 598
 599 void
 600 enternotify(XEvent *e) {
 601         Client *c;
 602         XCrossingEvent *ev = &e->xcrossing;
 603
 604         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 605                 return;
 606         if((c = getclient(ev->window)))
 607                 focus(c);
 608         else
 609                 focus(NULL);
 610 }
 611
 612 void
 613 expose(XEvent *e) {
 614         XExposeEvent *ev = &e->xexpose;
 615
 616         if(ev->count == 0 && (ev->window == barwin))
 617                 drawbar();
 618 }
 619
 620 void
 621 focus(Client *c) {
 622         if(!c || !ISVISIBLE(c))
 623                 for(c = stack; c && !ISVISIBLE(c); c = c->snext);
 624         if(sel && sel != c) {
 625                 grabbuttons(sel, False);
 626                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 627         }
 628         if(c) {
 629                 detachstack(c);
 630                 attachstack(c);
 631                 grabbuttons(c, True);
 632                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 633                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 634         }
 635         else
 636                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 637         sel = c;
 638         drawbar();
 639 }
 640
 641 void
 642 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 643         XFocusChangeEvent *ev = &e->xfocus;
 644
 645         if(sel && ev->window != sel->win)
 646                 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
 647 }
 648
 649 void
 650 focusstack(const Arg *arg) {
 651         Client *c = NULL, *i;
 652
 653         if(!sel)
 654                 return;
 655         if (arg->i > 0) {
 656                 for(c = sel->next; c && !ISVISIBLE(c); c = c->next);
 657                 if(!c)
 658                         for(c = clients; c && !ISVISIBLE(c); c = c->next);
 659         }
 660         else {
 661                 for(i = clients; i != sel; i = i->next)
 662                         if(ISVISIBLE(i))
 663                                 c = i;
 664                 if(!c)
 665                         for(; i; i = i->next)
 666                                 if(ISVISIBLE(i))
 667                                         c = i;
 668         }
 669         if(c) {
 670                 focus(c);
 671                 restack();
 672         }
 673 }
 674
 675 Client *
 676 getclient(Window w) {
 677         Client *c;
 678
 679         for(c = clients; c && c->win != w; c = c->next);
 680         return c;
 681 }
 682
 683 unsigned long
 684 getcolor(const char *colstr) {
 685         Colormap cmap = DefaultColormap(dpy, screen);
 686         XColor color;
 687
 688         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 689                 die("error, cannot allocate color '%s'\n", colstr);
 690         return color.pixel;
 691 }
 692
 693 long
 694 getstate(Window w) {
 695         int format, status;
 696         long result = -1;
 697         unsigned char *p = NULL;
 698         unsigned long n, extra;
 699         Atom real;
 700
 701         status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 702                         &real, &format, &n, &extra, (unsigned char **)&p);
 703         if(status != Success)
 704                 return -1;
 705         if(n != 0)
 706                 result = *p;
 707         XFree(p);
 708         return result;
 709 }
 710
 711 Bool
 712 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 713         char **list = NULL;
 714         int n;
 715         XTextProperty name;
 716
 717         if(!text || size == 0)
 718                 return False;
 719         text[0] = '\0';
 720         XGetTextProperty(dpy, w, &name, atom);
 721         if(!name.nitems)
 722                 return False;
 723         if(name.encoding == XA_STRING)
 724                 strncpy(text, (char *)name.value, size - 1);
 725         else {
 726                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 727                 && n > 0 && *list) {
 728                         strncpy(text, *list, size - 1);
 729                         XFreeStringList(list);
 730                 }
 731         }
 732         text[size - 1] = '\0';
 733         XFree(name.value);
 734         return True;
 735 }
 736
 737 void
 738 grabbuttons(Client *c, Bool focused) {
 739         unsigned int i, j;
 740         unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 741
 742         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 743         if(focused) {
 744                 for(i = 0; i < LENGTH(buttons); i++)
 745                         if(buttons[i].click == ClkClientWin)
 746                                 for(j = 0; j < LENGTH(modifiers); j++)
 747                                         XGrabButton(dpy, buttons[i].button, buttons[i].mask | modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 748         } else
 749                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 750                             BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 751 }
 752
 753 void
 754 grabkeys(void) {
 755         unsigned int i, j;
 756         unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 757         KeyCode code;
 758         XModifierKeymap *modmap;
 759
 760         /* init modifier map */
 761         modmap = XGetModifierMapping(dpy);
 762         for(i = 0; i < 8; i++)
 763                 for(j = 0; j < modmap->max_keypermod; j++) {
 764                         if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
 765                                 numlockmask = (1 << i);
 766                 }
 767         XFreeModifiermap(modmap);
 768
 769         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 770         for(i = 0; i < LENGTH(keys); i++) {
 771                 code = XKeysymToKeycode(dpy, keys[i].keysym);
 772                 for(j = 0; j < LENGTH(modifiers); j++)
 773                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root, True,
 774                                  GrabModeAsync, GrabModeAsync);
 775         }
 776 }
 777
 778 void
 779 initfont(const char *fontstr) {
 780         char *def, **missing;
 781         int i, n;
 782
 783         missing = NULL;
 784         if(dc.font.set)
 785                 XFreeFontSet(dpy, dc.font.set);
 786         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 787         if(missing) {
 788                 while(n--)
 789                         fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 790                 XFreeStringList(missing);
 791         }
 792         if(dc.font.set) {
 793                 XFontSetExtents *font_extents;
 794                 XFontStruct **xfonts;
 795                 char **font_names;
 796                 dc.font.ascent = dc.font.descent = 0;
 797                 font_extents = XExtentsOfFontSet(dc.font.set);
 798                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 799                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 800                         dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
 801                         dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
 802                         xfonts++;
 803                 }
 804         }
 805         else {
 806                 if(dc.font.xfont)
 807                         XFreeFont(dpy, dc.font.xfont);
 808                 dc.font.xfont = NULL;
 809                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
 810                 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 811                         die("error, cannot load font: '%s'\n", fontstr);
 812                 dc.font.ascent = dc.font.xfont->ascent;
 813                 dc.font.descent = dc.font.xfont->descent;
 814         }
 815         dc.font.height = dc.font.ascent + dc.font.descent;
 816 }
 817
 818 Bool
 819 isprotodel(Client *c) {
 820         int i, n;
 821         Atom *protocols;
 822         Bool ret = False;
 823
 824         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
 825                 for(i = 0; !ret && i < n; i++)
 826                         if(protocols[i] == wmatom[WMDelete])
 827                                 ret = True;
 828                 XFree(protocols);
 829         }
 830         return ret;
 831 }
 832
 833 void
 834 keypress(XEvent *e) {
 835         unsigned int i;
 836         KeySym keysym;
 837         XKeyEvent *ev;
 838
 839         ev = &e->xkey;
 840         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 841         for(i = 0; i < LENGTH(keys); i++)
 842                 if(keysym == keys[i].keysym
 843                    && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 844                    && keys[i].func)
 845                         keys[i].func(&(keys[i].arg));
 846 }
 847
 848 void
 849 killclient(const Arg *arg) {
 850         XEvent ev;
 851
 852         if(!sel)
 853                 return;
 854         if(isprotodel(sel)) {
 855                 ev.type = ClientMessage;
 856                 ev.xclient.window = sel->win;
 857                 ev.xclient.message_type = wmatom[WMProtocols];
 858                 ev.xclient.format = 32;
 859                 ev.xclient.data.l[0] = wmatom[WMDelete];
 860                 ev.xclient.data.l[1] = CurrentTime;
 861                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 862         }
 863         else
 864                 XKillClient(dpy, sel->win);
 865 }
 866
 867 void
 868 manage(Window w, XWindowAttributes *wa) {
 869         Client *c, *t = NULL;
 870         Window trans = 0;
 871         XWindowChanges wc;
 872
 873         if(!(c = calloc(1, sizeof(Client))))
 874                 die("fatal: could not calloc() %u bytes\n", sizeof(Client));
 875         c->win = w;
 876
 877         /* geometry */
 878         c->x = wa->x;
 879         c->y = wa->y;
 880         c->w = wa->width;
 881         c->h = wa->height;
 882         c->oldbw = wa->border_width;
 883         if(c->w == sw && c->h == sh) {
 884                 c->x = sx;
 885                 c->y = sy;
 886                 c->bw = 0;
 887         }
 888         else {
 889                 if(c->x + c->w + 2 * c->bw > sx + sw)
 890                         c->x = sx + sw - c->w - 2 * c->bw;
 891                 if(c->y + c->h + 2 * c->bw > sy + sh)
 892                         c->y = sy + sh - c->h - 2 * c->bw;
 893                 c->x = MAX(c->x, sx);
 894                 /* only fix client y-offset, if the client center might cover the bar */
 895                 c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
 896                 c->bw = borderpx;
 897         }
 898
 899         wc.border_width = c->bw;
 900         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 901         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 902         configure(c); /* propagates border_width, if size doesn't change */
 903         updatesizehints(c);
 904         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
 905         grabbuttons(c, False);
 906         updatetitle(c);
 907         if(XGetTransientForHint(dpy, w, &trans))
 908                 t = getclient(trans);
 909         if(t)
 910                 c->tags = t->tags;
 911         else
 912                 applyrules(c);
 913         if(!c->isfloating)
 914                 c->isfloating = trans || c->isfixed;
 915         if(c->isfloating)
 916                 XRaiseWindow(dpy, c->win);
 917         attach(c);
 918         attachstack(c);
 919         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
 920         XMapWindow(dpy, c->win);
 921         setclientstate(c, NormalState);
 922         arrange();
 923 }
 924
 925 void
 926 mappingnotify(XEvent *e) {
 927         XMappingEvent *ev = &e->xmapping;
 928
 929         XRefreshKeyboardMapping(ev);
 930         if(ev->request == MappingKeyboard)
 931                 grabkeys();
 932 }
 933
 934 void
 935 maprequest(XEvent *e) {
 936         static XWindowAttributes wa;
 937         XMapRequestEvent *ev = &e->xmaprequest;
 938
 939         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 940                 return;
 941         if(wa.override_redirect)
 942                 return;
 943         if(!getclient(ev->window))
 944                 manage(ev->window, &wa);
 945 }
 946
 947 void
 948 monocle(void) {
 949         Client *c;
 950
 951         for(c = nexttiled(clients); c; c = nexttiled(c->next))
 952                 resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
 953 }
 954
 955 void
 956 movemouse(const Arg *arg) {
 957         int x, y, ocx, ocy, di, nx, ny;
 958         unsigned int dui;
 959         Client *c;
 960         Window dummy;
 961         XEvent ev;
 962
 963         if(!(c = sel))
 964                 return;
 965         restack();
 966         ocx = nx = c->x;
 967         ocy = ny = c->y;
 968         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
 969         None, cursor[CurMove], CurrentTime) != GrabSuccess)
 970                 return;
 971         XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
 972         for(;;) {
 973                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
 974                 switch (ev.type) {
 975                 case ButtonRelease:
 976                         XUngrabPointer(dpy, CurrentTime);
 977                         return;
 978                 case ConfigureRequest:
 979                 case Expose:
 980                 case MapRequest:
 981                         handler[ev.type](&ev);
 982                         break;
 983                 case MotionNotify:
 984                         XSync(dpy, False);
 985                         nx = ocx + (ev.xmotion.x - x);
 986                         ny = ocy + (ev.xmotion.y - y);
 987                         if(snap && nx >= wx && nx <= wx + ww
 988                                 && ny >= wy && ny <= wy + wh) {
 989                                 if(abs(wx - nx) < snap)
 990                                         nx = wx;
 991                                 else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
 992                                         nx = wx + ww - c->w - 2 * c->bw;
 993                                 if(abs(wy - ny) < snap)
 994                                         ny = wy;
 995                                 else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
 996                                         ny = wy + wh - c->h - 2 * c->bw;
 997                                 if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
 998                                         togglefloating(NULL);
 999                         }
1000                         if(!lt[sellt]->arrange || c->isfloating)
1001                                 resize(c, nx, ny, c->w, c->h, False);
1002                         break;
1003                 }
1004         }
1005 }
1006
1007 Client *
1008 nexttiled(Client *c) {
1009         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1010         return c;
1011 }
1012
1013 void
1014 propertynotify(XEvent *e) {
1015         Client *c;
1016         Window trans;
1017         XPropertyEvent *ev = &e->xproperty;
1018
1019         if(ev->state == PropertyDelete)
1020                 return; /* ignore */
1021         if((c = getclient(ev->window))) {
1022                 switch (ev->atom) {
1023                 default: break;
1024                 case XA_WM_TRANSIENT_FOR:
1025                         XGetTransientForHint(dpy, c->win, &trans);
1026                         if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1027                                 arrange();
1028                         break;
1029                 case XA_WM_NORMAL_HINTS:
1030                         updatesizehints(c);
1031                         break;
1032                 case XA_WM_HINTS:
1033                         updatewmhints(c);
1034                         drawbar();
1035                         break;
1036                 }
1037                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1038                         updatetitle(c);
1039                         if(c == sel)
1040                                 drawbar();
1041                 }
1042         }
1043 }
1044
1045 void
1046 quit(const Arg *arg) {
1047         readin = running = False;
1048 }
1049
1050 void
1051 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1052         XWindowChanges wc;
1053
1054         if(sizehints) {
1055                 /* set minimum possible */
1056                 w = MAX(1, w);
1057                 h = MAX(1, h);
1058
1059                 /* temporarily remove base dimensions */
1060                 w -= c->basew;
1061                 h -= c->baseh;
1062
1063                 /* adjust for aspect limits */
1064                 if(c->mina > 0 && c->maxa > 0) {
1065                         if(c->maxa < (float) w/h)
1066                                 w = h * c->maxa;
1067                         else if(c->mina > (float) h/w)
1068                                 h = w * c->mina;
1069                 }
1070
1071                 /* adjust for increment value */
1072                 if(c->incw)
1073                         w -= w % c->incw;
1074                 if(c->inch)
1075                         h -= h % c->inch;
1076
1077                 /* restore base dimensions */
1078                 w += c->basew;
1079                 h += c->baseh;
1080
1081                 w = MAX(w, c->minw);
1082                 h = MAX(h, c->minh);
1083
1084                 if(c->maxw)
1085                         w = MIN(w, c->maxw);
1086
1087                 if(c->maxh)
1088                         h = MIN(h, c->maxh);
1089         }
1090         if(w <= 0 || h <= 0)
1091                 return;
1092         if(x > sx + sw)
1093                 x = sw - w - 2 * c->bw;
1094         if(y > sy + sh)
1095                 y = sh - h - 2 * c->bw;
1096         if(x + w + 2 * c->bw < sx)
1097                 x = sx;
1098         if(y + h + 2 * c->bw < sy)
1099                 y = sy;
1100         if(h < bh)
1101                 h = bh;
1102         if(w < bh)
1103                 w = bh;
1104         if(c->x != x || c->y != y || c->w != w || c->h != h) {
1105                 c->x = wc.x = x;
1106                 c->y = wc.y = y;
1107                 c->w = wc.width = w;
1108                 c->h = wc.height = h;
1109                 wc.border_width = c->bw;
1110                 XConfigureWindow(dpy, c->win,
1111                                 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1112                 configure(c);
1113                 XSync(dpy, False);
1114         }
1115 }
1116
1117 void
1118 resizemouse(const Arg *arg) {
1119         int ocx, ocy;
1120         int nw, nh;
1121         Client *c;
1122         XEvent ev;
1123
1124         if(!(c = sel))
1125                 return;
1126         restack();
1127         ocx = c->x;
1128         ocy = c->y;
1129         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1130         None, cursor[CurResize], CurrentTime) != GrabSuccess)
1131                 return;
1132         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1133         for(;;) {
1134                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1135                 switch(ev.type) {
1136                 case ButtonRelease:
1137                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1138                                         c->w + c->bw - 1, c->h + c->bw - 1);
1139                         XUngrabPointer(dpy, CurrentTime);
1140                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1141                         return;
1142                 case ConfigureRequest:
1143                 case Expose:
1144                 case MapRequest:
1145                         handler[ev.type](&ev);
1146                         break;
1147                 case MotionNotify:
1148                         XSync(dpy, False);
1149                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1150                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1151
1152                         if(snap && nw >= wx && nw <= wx + ww
1153                                 && nh >= wy && nh <= wy + wh) {
1154                                 if(!c->isfloating && lt[sellt]->arrange
1155                                    && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1156                                         togglefloating(NULL);
1157                         }
1158                         if(!lt[sellt]->arrange || c->isfloating)
1159                                 resize(c, c->x, c->y, nw, nh, True);
1160                         break;
1161                 }
1162         }
1163 }
1164
1165 void
1166 restack(void) {
1167         Client *c;
1168         XEvent ev;
1169         XWindowChanges wc;
1170
1171         drawbar();
1172         if(!sel)
1173                 return;
1174         if(sel->isfloating || !lt[sellt]->arrange)
1175                 XRaiseWindow(dpy, sel->win);
1176         if(lt[sellt]->arrange) {
1177                 wc.stack_mode = Below;
1178                 wc.sibling = barwin;
1179                 for(c = stack; c; c = c->snext)
1180                         if(!c->isfloating && ISVISIBLE(c)) {
1181                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1182                                 wc.sibling = c->win;
1183                         }
1184         }
1185         XSync(dpy, False);
1186         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1187 }
1188
1189 void
1190 run(void) {
1191         char *p;
1192         char sbuf[sizeof stext];
1193         fd_set rd;
1194         int r, xfd;
1195         unsigned int len, offset;
1196         XEvent ev;
1197
1198         /* main event loop, also reads status text from stdin */
1199         XSync(dpy, False);
1200         xfd = ConnectionNumber(dpy);
1201         offset = 0;
1202         len = sizeof stext - 1;
1203         sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1204         while(running) {
1205                 FD_ZERO(&rd);
1206                 if(readin)
1207                         FD_SET(STDIN_FILENO, &rd);
1208                 FD_SET(xfd, &rd);
1209                 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1210                         if(errno == EINTR)
1211                                 continue;
1212                         die("select failed\n");
1213                 }
1214                 if(FD_ISSET(STDIN_FILENO, &rd)) {
1215                         switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1216                         case -1:
1217                                 strncpy(stext, strerror(errno), len);
1218                                 readin = False;
1219                                 break;
1220                         case 0:
1221                                 strncpy(stext, "EOF", 4);
1222                                 readin = False;
1223                                 break;
1224                         default:
1225                                 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1226                                         if(*p == '\n' || *p == '\0') {
1227                                                 *p = '\0';
1228                                                 strncpy(stext, sbuf, len);
1229                                                 p += r - 1; /* p is sbuf + offset + r - 1 */
1230                                                 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1231                                                 offset = r;
1232                                                 if(r)
1233                                                         memmove(sbuf, p - r + 1, r);
1234                                                 break;
1235                                         }
1236                                 break;
1237                         }
1238                         drawbar();
1239                 }
1240                 while(XPending(dpy)) {
1241                         XNextEvent(dpy, &ev);
1242                         if(handler[ev.type])
1243                                 (handler[ev.type])(&ev); /* call handler */
1244                 }
1245         }
1246 }
1247
1248 void
1249 scan(void) {
1250         unsigned int i, num;
1251         Window *wins, d1, d2;
1252         XWindowAttributes wa;
1253
1254         wins = NULL;
1255         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1256                 for(i = 0; i < num; i++) {
1257                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1258                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1259                                 continue;
1260                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1261                                 manage(wins[i], &wa);
1262                 }
1263                 for(i = 0; i < num; i++) { /* now the transients */
1264                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1265                                 continue;
1266                         if(XGetTransientForHint(dpy, wins[i], &d1)
1267                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1268                                 manage(wins[i], &wa);
1269                 }
1270         }
1271         if(wins)
1272                 XFree(wins);
1273 }
1274
1275 void
1276 setclientstate(Client *c, long state) {
1277         long data[] = {state, None};
1278
1279         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1280                         PropModeReplace, (unsigned char *)data, 2);
1281 }
1282
1283 void
1284 setlayout(const Arg *arg) {
1285         if(!arg || !arg->v || arg->v != lt[sellt])
1286                 sellt ^= 1;
1287         if(arg && arg->v)
1288                 lt[sellt] = (Layout *)arg->v;
1289         if(sel)
1290                 arrange();
1291         else
1292                 drawbar();
1293 }
1294
1295 /* arg > 1.0 will set mfact absolutly */
1296 void
1297 setmfact(const Arg *arg) {
1298         float f;
1299
1300         if(!arg || !lt[sellt]->arrange)
1301                 return;
1302         f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0;
1303         if(f < 0.1 || f > 0.9)
1304                 return;
1305         mfact = f;
1306         arrange();
1307 }
1308
1309 void
1310 setup(void) {
1311         unsigned int i;
1312         int w;
1313         XSetWindowAttributes wa;
1314
1315         /* init screen */
1316         screen = DefaultScreen(dpy);
1317         root = RootWindow(dpy, screen);
1318         initfont(font);
1319         sx = 0;
1320         sy = 0;
1321         sw = DisplayWidth(dpy, screen);
1322         sh = DisplayHeight(dpy, screen);
1323         bh = dc.h = dc.font.height + 2;
1324         lt[0] = &layouts[0];
1325         lt[1] = &layouts[1 % LENGTH(layouts)];
1326         updategeom();
1327
1328         /* init atoms */
1329         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1330         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1331         wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1332         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1333         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1334         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1335
1336         /* init cursors */
1337         wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1338         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1339         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1340
1341         /* init appearance */
1342         dc.norm[ColBorder] = getcolor(normbordercolor);
1343         dc.norm[ColBG] = getcolor(normbgcolor);
1344         dc.norm[ColFG] = getcolor(normfgcolor);
1345         dc.sel[ColBorder] = getcolor(selbordercolor);
1346         dc.sel[ColBG] = getcolor(selbgcolor);
1347         dc.sel[ColFG] = getcolor(selfgcolor);
1348         dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1349         dc.gc = XCreateGC(dpy, root, 0, 0);
1350         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1351         if(!dc.font.set)
1352                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1353
1354         /* init bar */
1355         for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
1356                 w = TEXTW(layouts[i].symbol);
1357                 blw = MAX(blw, w);
1358         }
1359
1360         wa.override_redirect = 1;
1361         wa.background_pixmap = ParentRelative;
1362         wa.event_mask = ButtonPressMask|ExposureMask;
1363
1364         barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen),
1365                         CopyFromParent, DefaultVisual(dpy, screen),
1366                         CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1367         XDefineCursor(dpy, barwin, cursor[CurNormal]);
1368         XMapRaised(dpy, barwin);
1369         strcpy(stext, "dwm-"VERSION);
1370         drawbar();
1371
1372         /* EWMH support per view */
1373         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1374                         PropModeReplace, (unsigned char *) netatom, NetLast);
1375
1376         /* select for events */
1377         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
1378                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1379         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1380         XSelectInput(dpy, root, wa.event_mask);
1381
1382
1383         /* grab keys */
1384         grabkeys();
1385 }
1386
1387 void
1388 spawn(const Arg *arg) {
1389         /* The double-fork construct avoids zombie processes and keeps the code
1390          * clean from stupid signal handlers. */
1391         if(fork() == 0) {
1392                 if(fork() == 0) {
1393                         if(dpy)
1394                                 close(ConnectionNumber(dpy));
1395                         setsid();
1396                         execvp(((char **)arg->v)[0], (char **)arg->v);
1397                         fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1398                         perror(" failed");
1399                 }
1400                 exit(0);
1401         }
1402         wait(0);
1403 }
1404
1405 void
1406 tag(const Arg *arg) {
1407         if(sel && arg->ui & TAGMASK) {
1408                 sel->tags = arg->ui & TAGMASK;
1409                 arrange();
1410         }
1411 }
1412
1413 int
1414 textnw(const char *text, unsigned int len) {
1415         XRectangle r;
1416
1417         if(dc.font.set) {
1418                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1419                 return r.width;
1420         }
1421         return XTextWidth(dc.font.xfont, text, len);
1422 }
1423
1424 void
1425 tile(void) {
1426         int x, y, h, w, mw;
1427         unsigned int i, n;
1428         Client *c;
1429
1430         for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++);
1431         if(n == 0)
1432                 return;
1433
1434         /* master */
1435         c = nexttiled(clients);
1436         mw = mfact * ww;
1437         resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
1438
1439         if(--n == 0)
1440                 return;
1441
1442         /* tile stack */
1443         x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw;
1444         y = wy;
1445         w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw;
1446         h = wh / n;
1447         if(h < bh)
1448                 h = wh;
1449
1450         for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
1451                 resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
1452                        ? (wy + wh) - y : h) - 2 * c->bw, resizehints);
1453                 if(h != wh)
1454                         y = c->y + c->h + 2 * c->bw;
1455         }
1456 }
1457
1458 void
1459 togglebar(const Arg *arg) {
1460         showbar = !showbar;
1461         updategeom();
1462         updatebar();
1463         arrange();
1464 }
1465
1466 void
1467 togglefloating(const Arg *arg) {
1468         if(!sel)
1469                 return;
1470         sel->isfloating = !sel->isfloating || sel->isfixed;
1471         if(sel->isfloating)
1472                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1473         arrange();
1474 }
1475
1476 void
1477 toggletag(const Arg *arg) {
1478         unsigned int mask = sel->tags ^ (arg->ui & TAGMASK);
1479
1480         if(sel && mask) {
1481                 sel->tags = mask;
1482                 arrange();
1483         }
1484 }
1485
1486 void
1487 toggleview(const Arg *arg) {
1488         unsigned int mask = tagset[seltags] ^ (arg->ui & TAGMASK);
1489
1490         if(mask) {
1491                 tagset[seltags] = mask;
1492                 clearurgent();
1493                 arrange();
1494         }
1495 }
1496
1497 void
1498 unmanage(Client *c) {
1499         XWindowChanges wc;
1500
1501         wc.border_width = c->oldbw;
1502         /* The server grab construct avoids race conditions. */
1503         XGrabServer(dpy);
1504         XSetErrorHandler(xerrordummy);
1505         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1506         detach(c);
1507         detachstack(c);
1508         if(sel == c)
1509                 focus(NULL);
1510         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1511         setclientstate(c, WithdrawnState);
1512         free(c);
1513         XSync(dpy, False);
1514         XSetErrorHandler(xerror);
1515         XUngrabServer(dpy);
1516         arrange();
1517 }
1518
1519 void
1520 unmapnotify(XEvent *e) {
1521         Client *c;
1522         XUnmapEvent *ev = &e->xunmap;
1523
1524         if((c = getclient(ev->window)))
1525                 unmanage(c);
1526 }
1527
1528 void
1529 updatebar(void) {
1530         if(dc.drawable != 0)
1531                 XFreePixmap(dpy, dc.drawable);
1532         dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen));
1533         XMoveResizeWindow(dpy, barwin, wx, by, ww, bh);
1534 }
1535
1536 void
1537 updategeom(void) {
1538 #ifdef XINERAMA
1539         int n, i = 0;
1540         XineramaScreenInfo *info = NULL;
1541
1542         /* window area geometry */
1543         if(XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
1544                 if(n > 1) {
1545                         int di, x, y;
1546                         unsigned int dui;
1547                         Window dummy;
1548                         if(XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui))
1549                                 for(i = 0; i < n; i++)
1550                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
1551                                                 break;
1552                 }
1553                 wx = info[i].x_org;
1554                 wy = showbar && topbar ?  info[i].y_org + bh : info[i].y_org;
1555                 ww = info[i].width;
1556                 wh = showbar ? info[i].height - bh : info[i].height;
1557                 XFree(info);
1558         }
1559         else
1560 #endif
1561         {
1562                 wx = sx;
1563                 wy = showbar && topbar ? sy + bh : sy;
1564                 ww = sw;
1565                 wh = showbar ? sh - bh : sh;
1566         }
1567
1568         /* bar position */
1569         by = showbar ? (topbar ? wy - bh : wy + wh) : -bh;
1570 }
1571
1572 void
1573 updatesizehints(Client *c) {
1574         long msize;
1575         XSizeHints size;
1576
1577         XGetWMNormalHints(dpy, c->win, &size, &msize);
1578         if(size.flags & PBaseSize) {
1579                 c->basew = size.base_width;
1580                 c->baseh = size.base_height;
1581         }
1582         else if(size.flags & PMinSize) {
1583                 c->basew = size.min_width;
1584                 c->baseh = size.min_height;
1585         }
1586         else
1587                 c->basew = c->baseh = 0;
1588         if(size.flags & PResizeInc) {
1589                 c->incw = size.width_inc;
1590                 c->inch = size.height_inc;
1591         }
1592         else
1593                 c->incw = c->inch = 0;
1594         if(size.flags & PMaxSize) {
1595                 c->maxw = size.max_width;
1596                 c->maxh = size.max_height;
1597         }
1598         else
1599                 c->maxw = c->maxh = 0;
1600         if(size.flags & PMinSize) {
1601                 c->minw = size.min_width;
1602                 c->minh = size.min_height;
1603         }
1604         else if(size.flags & PBaseSize) {
1605                 c->minw = size.base_width;
1606                 c->minh = size.base_height;
1607         }
1608         else
1609                 c->minw = c->minh = 0;
1610         if(size.flags & PAspect) {
1611                 c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x;
1612                 c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y;
1613         }
1614         else
1615                 c->maxa = c->mina = 0.0;
1616         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1617                         && c->maxw == c->minw && c->maxh == c->minh);
1618 }
1619
1620 void
1621 updatetitle(Client *c) {
1622         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1623                 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1624 }
1625
1626 void
1627 updatewmhints(Client *c) {
1628         XWMHints *wmh;
1629
1630         if((wmh = XGetWMHints(dpy, c->win))) {
1631                 if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
1632                         wmh->flags &= ~XUrgencyHint;
1633                         XSetWMHints(dpy, c->win, wmh);
1634                 }
1635                 else
1636                         c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1637
1638                 XFree(wmh);
1639         }
1640 }
1641
1642 void
1643 view(const Arg *arg) {
1644         if(arg && (arg->ui & TAGMASK) == tagset[seltags])
1645                 return;
1646         seltags ^= 1; /* toggle sel tagset */
1647         if(arg && (arg->ui & TAGMASK))
1648                 tagset[seltags] = arg->ui & TAGMASK;
1649         clearurgent();
1650         arrange();
1651 }
1652
1653 /* There's no way to check accesses to destroyed windows, thus those cases are
1654  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
1655  * default error handler, which may call exit.  */
1656 int
1657 xerror(Display *dpy, XErrorEvent *ee) {
1658         if(ee->error_code == BadWindow
1659         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1660         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1661         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1662         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1663         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1664         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
1665         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1666         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1667                 return 0;
1668         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1669                         ee->request_code, ee->error_code);
1670         return xerrorxlib(dpy, ee); /* may call exit */
1671 }
1672
1673 int
1674 xerrordummy(Display *dpy, XErrorEvent *ee) {
1675         return 0;
1676 }
1677
1678 /* Startup Error handler to check if another window manager
1679  * is already running. */
1680 int
1681 xerrorstart(Display *dpy, XErrorEvent *ee) {
1682         otherwm = True;
1683         return -1;
1684 }
1685
1686 void
1687 zoom(const Arg *arg) {
1688         Client *c = sel;
1689
1690         if(!lt[sellt]->arrange || lt[sellt]->arrange == monocle || (sel && sel->isfloating))
1691                 return;
1692         if(c == nexttiled(clients))
1693                 if(!c || !(c = nexttiled(c->next)))
1694                         return;
1695         detach(c);
1696         attach(c);
1697         focus(c);
1698         arrange();
1699 }
1700
1701 int
1702 main(int argc, char *argv[]) {
1703         if(argc == 2 && !strcmp("-v", argv[1]))
1704                 die("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1705         else if(argc != 1)
1706                 die("usage: dwm [-v]\n");
1707
1708         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1709                 fprintf(stderr, "warning: no locale support\n");
1710
1711         if(!(dpy = XOpenDisplay(0)))
1712                 die("dwm: cannot open display\n");
1713
1714         checkotherwm();
1715         setup();
1716         scan();
1717         run();
1718         cleanup();
1719
1720         XCloseDisplay(dpy);
1721         return 0;
1722 }