client.c

   1 /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.h"
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <X11/Xatom.h>
   8 #include <X11/Xutil.h>
   9
  10 /* static */
  11
  12 static void
  13 attachstack(Client *c) {
  14         c->snext = stack;
  15         stack = c;
  16 }
  17
  18 static void
  19 detachstack(Client *c) {
  20         Client **tc;
  21
  22         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  23         *tc = c->snext;
  24 }
  25
  26 static void
  27 grabbuttons(Client *c, Bool focused) {
  28         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  29
  30         if(focused) {
  31                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  32                                 GrabModeAsync, GrabModeSync, None, None);
  33                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  34                                 GrabModeAsync, GrabModeSync, None, None);
  35                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  36                                 GrabModeAsync, GrabModeSync, None, None);
  37                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  38                                 GrabModeAsync, GrabModeSync, None, None);
  39
  40                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  41                                 GrabModeAsync, GrabModeSync, None, None);
  42                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  43                                 GrabModeAsync, GrabModeSync, None, None);
  44                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  45                                 GrabModeAsync, GrabModeSync, None, None);
  46                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  47                                 GrabModeAsync, GrabModeSync, None, None);
  48
  49                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  50                                 GrabModeAsync, GrabModeSync, None, None);
  51                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  52                                 GrabModeAsync, GrabModeSync, None, None);
  53                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  54                                 GrabModeAsync, GrabModeSync, None, None);
  55                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  56                                 GrabModeAsync, GrabModeSync, None, None);
  57         }
  58         else
  59                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  60                                 GrabModeAsync, GrabModeSync, None, None);
  61 }
  62
  63 static Bool
  64 isprotodel(Client *c) {
  65         int i, n;
  66         Atom *protocols;
  67         Bool ret = False;
  68
  69         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  70                 for(i = 0; !ret && i < n; i++)
  71                         if(protocols[i] == wmatom[WMDelete])
  72                                 ret = True;
  73                 XFree(protocols);
  74         }
  75         return ret;
  76 }
  77
  78 static void
  79 setclientstate(Client *c, long state) {
  80         long data[] = {state, None};
  81
  82         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  83                         PropModeReplace, (unsigned char *)data, 2);
  84 }
  85
  86 static void
  87 togglemax(Client *c) {
  88         XEvent ev;
  89
  90         if(c->isfixed)
  91                 return;
  92         if((c->ismax = !c->ismax)) {
  93                 c->rx = c->x;
  94                 c->ry = c->y;
  95                 c->rw = c->w;
  96                 c->rh = c->h;
  97                 resize(c, wax, way, waw - 2 * BORDERPX, wah - 2 * BORDERPX, True);
  98         }
  99         else
 100                 resize(c, c->rx, c->ry, c->rw, c->rh, True);
 101         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 102 }
 103
 104 static int
 105 xerrordummy(Display *dsply, XErrorEvent *ee) {
 106         return 0;
 107 }
 108
 109 /* extern */
 110
 111 void
 112 attach(Client *c) {
 113         if(clients)
 114                 clients->prev = c;
 115         c->next = clients;
 116         clients = c;
 117 }
 118
 119 void
 120 configure(Client *c) {
 121         XConfigureEvent ce;
 122
 123         ce.type = ConfigureNotify;
 124         ce.display = dpy;
 125         ce.event = c->win;
 126         ce.window = c->win;
 127         ce.x = c->x;
 128         ce.y = c->y;
 129         ce.width = c->w;
 130         ce.height = c->h;
 131         ce.border_width = c->border;
 132         ce.above = None;
 133         ce.override_redirect = False;
 134         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 135 }
 136
 137 void
 138 detach(Client *c) {
 139         if(c->prev)
 140                 c->prev->next = c->next;
 141         if(c->next)
 142                 c->next->prev = c->prev;
 143         if(c == clients)
 144                 clients = c->next;
 145         c->next = c->prev = NULL;
 146 }
 147
 148 void
 149 focus(Client *c) {
 150         if(c && !isvisible(c))
 151                 return;
 152         if(sel && sel != c) {
 153                 grabbuttons(sel, False);
 154                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 155         }
 156         if(c) {
 157                 detachstack(c);
 158                 attachstack(c);
 159                 grabbuttons(c, True);
 160         }
 161         sel = c;
 162         drawstatus();
 163         if(!selscreen)
 164                 return;
 165         if(c) {
 166                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 167                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 168         }
 169         else
 170                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 171 }
 172
 173 void
 174 focusnext(Arg *arg) {
 175         Client *c;
 176
 177         if(!sel)
 178                 return;
 179         for(c = sel->next; c && !isvisible(c); c = c->next);
 180         if(!c)
 181                 for(c = clients; c && !isvisible(c); c = c->next);
 182         if(c) {
 183                 focus(c);
 184                 restack();
 185         }
 186 }
 187
 188 void
 189 focusprev(Arg *arg) {
 190         Client *c;
 191
 192         if(!sel)
 193                 return;
 194         for(c = sel->prev; c && !isvisible(c); c = c->prev);
 195         if(!c) {
 196                 for(c = clients; c && c->next; c = c->next);
 197                 for(; c && !isvisible(c); c = c->prev);
 198         }
 199         if(c) {
 200                 focus(c);
 201                 restack();
 202         }
 203 }
 204
 205 void
 206 killclient(Arg *arg) {
 207         if(!sel)
 208                 return;
 209         if(isprotodel(sel))
 210                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 211         else
 212                 XKillClient(dpy, sel->win);
 213 }
 214
 215 void
 216 manage(Window w, XWindowAttributes *wa) {
 217         Client *c, *t;
 218         Window trans;
 219         XWindowChanges wc;
 220
 221         c = emallocz(sizeof(Client));
 222         c->tags = emallocz(ntags * sizeof(Bool));
 223         c->win = w;
 224         c->x = wa->x;
 225         c->y = wa->y;
 226         c->w = wa->width;
 227         c->h = wa->height;
 228         if(c->w == sw && c->h == sh) {
 229                 c->border = 0;
 230                 c->x = sx;
 231                 c->y = sy;
 232         }
 233         else {
 234                 c->border = BORDERPX;
 235                 if(c->x + c->w + 2 * c->border > wax + waw)
 236                         c->x = wax + waw - c->w - 2 * c->border;
 237                 if(c->y + c->h + 2 * c->border > way + wah)
 238                         c->y = way + wah - c->h - 2 * c->border;
 239                 if(c->x < wax)
 240                         c->x = wax;
 241                 if(c->y < way)
 242                         c->y = way;
 243         }
 244         updatesizehints(c);
 245         XSelectInput(dpy, w,
 246                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 247         XGetTransientForHint(dpy, w, &trans);
 248         grabbuttons(c, False);
 249         wc.border_width = c->border;
 250         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 251         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 252         configure(c); /* propagates border_width, if size doesn't change */
 253         updatetitle(c);
 254         for(t = clients; t && t->win != trans; t = t->next);
 255         settags(c, t);
 256         if(!c->swimming)
 257                 c->swimming = (t != NULL) || c->isfixed;
 258         attach(c);
 259         attachstack(c);
 260         c->isbanned = True;
 261         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 262         XMapWindow(dpy, w);
 263         setclientstate(c, NormalState);
 264         if(isvisible(c))
 265                 focus(c);
 266         lt->arrange();
 267 }
 268
 269 Client *
 270 nexttiled(Client *c) {
 271         for(; c && (c->swimming || !isvisible(c)); c = c->next);
 272         return c;
 273 }
 274
 275 void
 276 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 277         float actual, dx, dy, max, min;
 278         XWindowChanges wc;
 279
 280         if(w <= 0 || h <= 0)
 281                 return;
 282         if(sizehints) {
 283                 if(c->minw && w < c->minw)
 284                         w = c->minw;
 285                 if(c->minh && h < c->minh)
 286                         h = c->minh;
 287                 if(c->maxw && w > c->maxw)
 288                         w = c->maxw;
 289                 if(c->maxh && h > c->maxh)
 290                         h = c->maxh;
 291                 /* inspired by algorithm from fluxbox */
 292                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 293                         dx = (float)(w - c->basew);
 294                         dy = (float)(h - c->baseh);
 295                         min = (float)(c->minax) / (float)(c->minay);
 296                         max = (float)(c->maxax) / (float)(c->maxay);
 297                         actual = dx / dy;
 298                         if(max > 0 && min > 0 && actual > 0) {
 299                                 if(actual < min) {
 300                                         dy = (dx * min + dy) / (min * min + 1);
 301                                         dx = dy * min;
 302                                         w = (int)dx + c->basew;
 303                                         h = (int)dy + c->baseh;
 304                                 }
 305                                 else if(actual > max) {
 306                                         dy = (dx * min + dy) / (max * max + 1);
 307                                         dx = dy * min;
 308                                         w = (int)dx + c->basew;
 309                                         h = (int)dy + c->baseh;
 310                                 }
 311                         }
 312                 }
 313                 if(c->incw)
 314                         w -= (w - c->basew) % c->incw;
 315                 if(c->inch)
 316                         h -= (h - c->baseh) % c->inch;
 317         }
 318         if(w == sw && h == sh)
 319                 c->border = 0;
 320         else
 321                 c->border = BORDERPX;
 322         /* offscreen appearance fixes */
 323         if(x > sw)
 324                 x = sw - w - 2 * c->border;
 325         if(y > sh)
 326                 y = sh - h - 2 * c->border;
 327         if(x + w + 2 * c->border < sx)
 328                 x = sx;
 329         if(y + h + 2 * c->border < sy)
 330                 y = sy;
 331         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 332                 c->x = wc.x = x;
 333                 c->y = wc.y = y;
 334                 c->w = wc.width = w;
 335                 c->h = wc.height = h;
 336                 wc.border_width = c->border;
 337                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 338                 configure(c);
 339                 XSync(dpy, False);
 340         }
 341 }
 342
 343 void
 344 updatesizehints(Client *c) {
 345         long msize;
 346         XSizeHints size;
 347
 348         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 349                 size.flags = PSize;
 350         c->flags = size.flags;
 351         if(c->flags & PBaseSize) {
 352                 c->basew = size.base_width;
 353                 c->baseh = size.base_height;
 354         }
 355         else
 356                 c->basew = c->baseh = 0;
 357         if(c->flags & PResizeInc) {
 358                 c->incw = size.width_inc;
 359                 c->inch = size.height_inc;
 360         }
 361         else
 362                 c->incw = c->inch = 0;
 363         if(c->flags & PMaxSize) {
 364                 c->maxw = size.max_width;
 365                 c->maxh = size.max_height;
 366         }
 367         else
 368                 c->maxw = c->maxh = 0;
 369         if(c->flags & PMinSize) {
 370                 c->minw = size.min_width;
 371                 c->minh = size.min_height;
 372         }
 373         else
 374                 c->minw = c->minh = 0;
 375         if(c->flags & PAspect) {
 376                 c->minax = size.min_aspect.x;
 377                 c->minay = size.min_aspect.y;
 378                 c->maxax = size.max_aspect.x;
 379                 c->maxay = size.max_aspect.y;
 380         }
 381         else
 382                 c->minax = c->minay = c->maxax = c->maxay = 0;
 383         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 384                         && c->maxw == c->minw && c->maxh == c->minh);
 385 }
 386
 387 void
 388 updatetitle(Client *c) {
 389         char **list = NULL;
 390         int n;
 391         XTextProperty name;
 392
 393         name.nitems = 0;
 394         c->name[0] = 0;
 395         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 396         if(!name.nitems)
 397                 XGetWMName(dpy, c->win, &name);
 398         if(!name.nitems)
 399                 return;
 400         if(name.encoding == XA_STRING)
 401                 strncpy(c->name, (char *)name.value, sizeof c->name);
 402         else {
 403                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 404                 && n > 0 && *list)
 405                 {
 406                         strncpy(c->name, *list, sizeof c->name);
 407                         XFreeStringList(list);
 408                 }
 409         }
 410         XFree(name.value);
 411 }
 412
 413 void
 414 unmanage(Client *c) {
 415         Client *nc;
 416
 417         /* The server grab construct avoids race conditions. */
 418         XGrabServer(dpy);
 419         XSetErrorHandler(xerrordummy);
 420         detach(c);
 421         detachstack(c);
 422         if(sel == c) {
 423                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 424                 focus(nc);
 425         }
 426         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 427         setclientstate(c, WithdrawnState);
 428         free(c->tags);
 429         free(c);
 430         XSync(dpy, False);
 431         XSetErrorHandler(xerror);
 432         XUngrabServer(dpy);
 433         lt->arrange();
 434 }
 435
 436 void
 437 zoom(Arg *arg) {
 438         unsigned int n;
 439         Client *c;
 440
 441         if(!sel)
 442                 return;
 443         if(sel->swimming || (lt->arrange == swim)) {
 444                 togglemax(sel);
 445                 return;
 446         }
 447         for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
 448                 n++;
 449         if((c = sel) == nexttiled(clients))
 450                 if(!(c = nexttiled(c->next)))
 451                         return;
 452         detach(c);
 453         attach(c);
 454         focus(c);
 455         lt->arrange();
 456 }