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         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  22         *tc = c->snext;
  23 }
  24
  25 static void
  26 grabbuttons(Client *c, Bool focused) {
  27         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  28
  29         if(focused) {
  30                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  31                                 GrabModeAsync, GrabModeSync, None, None);
  32                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  33                                 GrabModeAsync, GrabModeSync, None, None);
  34                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  35                                 GrabModeAsync, GrabModeSync, None, None);
  36                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  37                                 GrabModeAsync, GrabModeSync, None, None);
  38
  39                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  40                                 GrabModeAsync, GrabModeSync, None, None);
  41                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  42                                 GrabModeAsync, GrabModeSync, None, None);
  43                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  44                                 GrabModeAsync, GrabModeSync, None, None);
  45                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47
  48                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  49                                 GrabModeAsync, GrabModeSync, None, None);
  50                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  51                                 GrabModeAsync, GrabModeSync, None, None);
  52                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  53                                 GrabModeAsync, GrabModeSync, None, None);
  54                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  55                                 GrabModeAsync, GrabModeSync, None, None);
  56         }
  57         else
  58                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  59                                 GrabModeAsync, GrabModeSync, None, None);
  60 }
  61
  62 static Bool
  63 isprotodel(Client *c) {
  64         int i, n;
  65         Atom *protocols;
  66         Bool ret = False;
  67
  68         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  69                 for(i = 0; !ret && i < n; i++)
  70                         if(protocols[i] == wmatom[WMDelete])
  71                                 ret = True;
  72                 XFree(protocols);
  73         }
  74         return ret;
  75 }
  76
  77 static void
  78 setclientstate(Client *c, long state) {
  79         long data[] = {state, None};
  80         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  81                         PropModeReplace, (unsigned char *)data, 2);
  82 }
  83
  84 static void
  85 togglemax(Client *c) {
  86         XEvent ev;
  87
  88         if(c->isfixed)
  89                 return;
  90         if((c->ismax = !c->ismax)) {
  91                 c->rx = c->x;
  92                 c->ry = c->y;
  93                 c->rw = c->w;
  94                 c->rh = c->h;
  95                 resize(c, wax, way, waw - 2 * BORDERPX, wah - 2 * BORDERPX, True);
  96         }
  97         else
  98                 resize(c, c->rx, c->ry, c->rw, c->rh, True);
  99         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 100 }
 101
 102 static int
 103 xerrordummy(Display *dsply, XErrorEvent *ee) {
 104         return 0;
 105 }
 106
 107 /* extern */
 108
 109 void
 110 attach(Client *c) {
 111         if(clients)
 112                 clients->prev = c;
 113         c->next = clients;
 114         clients = c;
 115 }
 116
 117 void
 118 configure(Client *c) {
 119         XConfigureEvent ce;
 120
 121         ce.type = ConfigureNotify;
 122         ce.display = dpy;
 123         ce.event = c->win;
 124         ce.window = c->win;
 125         ce.x = c->x;
 126         ce.y = c->y;
 127         ce.width = c->w;
 128         ce.height = c->h;
 129         ce.border_width = c->border;
 130         ce.above = None;
 131         ce.override_redirect = False;
 132         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 133 }
 134
 135 void
 136 detach(Client *c) {
 137         if(c->prev)
 138                 c->prev->next = c->next;
 139         if(c->next)
 140                 c->next->prev = c->prev;
 141         if(c == clients)
 142                 clients = c->next;
 143         c->next = c->prev = NULL;
 144 }
 145
 146 void
 147 focus(Client *c) {
 148         if(c && !isvisible(c))
 149                 return;
 150         if(sel && sel != c) {
 151                 grabbuttons(sel, False);
 152                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 153         }
 154         if(c) {
 155                 detachstack(c);
 156                 attachstack(c);
 157                 grabbuttons(c, True);
 158         }
 159         sel = c;
 160         drawstatus();
 161         if(!selscreen)
 162                 return;
 163         if(c) {
 164                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 165                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 166         }
 167         else
 168                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 169 }
 170
 171 void
 172 focusnext(Arg *arg) {
 173         Client *c;
 174
 175         if(!sel)
 176                 return;
 177         for(c = sel->next; c && !isvisible(c); c = c->next);
 178         if(!c)
 179                 for(c = clients; c && !isvisible(c); c = c->next);
 180         if(c) {
 181                 focus(c);
 182                 restack();
 183         }
 184 }
 185
 186 void
 187 focusprev(Arg *arg) {
 188         Client *c;
 189
 190         if(!sel)
 191                 return;
 192         for(c = sel->prev; c && !isvisible(c); c = c->prev);
 193         if(!c) {
 194                 for(c = clients; c && c->next; c = c->next);
 195                 for(; c && !isvisible(c); c = c->prev);
 196         }
 197         if(c) {
 198                 focus(c);
 199                 restack();
 200         }
 201 }
 202
 203 Client *
 204 getclient(Window w) {
 205         Client *c;
 206
 207         for(c = clients; c; c = c->next)
 208                 if(c->win == w)
 209                         return c;
 210         return NULL;
 211 }
 212
 213 void
 214 killclient(Arg *arg) {
 215         if(!sel)
 216                 return;
 217         if(isprotodel(sel))
 218                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 219         else
 220                 XKillClient(dpy, sel->win);
 221 }
 222
 223 void
 224 manage(Window w, XWindowAttributes *wa) {
 225         Client *c, *t;
 226         Window trans;
 227         XWindowChanges wc;
 228
 229         c = emallocz(sizeof(Client));
 230         c->tags = emallocz(ntags * sizeof(Bool));
 231         c->win = w;
 232         c->x = wa->x;
 233         c->y = wa->y;
 234         c->w = wa->width;
 235         c->h = wa->height;
 236         if(c->w == sw && c->h == sh) {
 237                 c->border = 0;
 238                 c->x = sx;
 239                 c->y = sy;
 240         }
 241         else {
 242                 c->border = BORDERPX;
 243                 if(c->x + c->w + 2 * c->border > wax + waw)
 244                         c->x = wax + waw - c->w - 2 * c->border;
 245                 if(c->y + c->h + 2 * c->border > way + wah)
 246                         c->y = way + wah - c->h - 2 * c->border;
 247                 if(c->x < wax)
 248                         c->x = wax;
 249                 if(c->y < way)
 250                         c->y = way;
 251         }
 252         updatesizehints(c);
 253         XSelectInput(dpy, c->win,
 254                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 255         XGetTransientForHint(dpy, c->win, &trans);
 256         grabbuttons(c, False);
 257         wc.border_width = c->border;
 258         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc);
 259         XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
 260         configure(c); /* propagates border_width, if size doesn't change */
 261         updatetitle(c);
 262         t = getclient(trans);
 263         settags(c, t);
 264         if(!c->isfloat)
 265                 c->isfloat = (t != 0) || c->isfixed;
 266         attach(c);
 267         attachstack(c);
 268         c->isbanned = True;
 269         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 270         XMapWindow(dpy, c->win);
 271         setclientstate(c, NormalState);
 272         if(isvisible(c))
 273                 focus(c);
 274         arrange();
 275 }
 276
 277 Client *
 278 nexttiled(Client *c) {
 279         for(; c && (c->isfloat || !isvisible(c)); c = c->next);
 280         return c;
 281 }
 282
 283 void
 284 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 285         float actual, dx, dy, max, min;
 286         XWindowChanges wc;
 287
 288         if(w <= 0 || h <= 0)
 289                 return;
 290         if(sizehints) {
 291                 if(c->minw && w < c->minw)
 292                         w = c->minw;
 293                 if(c->minh && h < c->minh)
 294                         h = c->minh;
 295                 if(c->maxw && w > c->maxw)
 296                         w = c->maxw;
 297                 if(c->maxh && h > c->maxh)
 298                         h = c->maxh;
 299                 /* inspired by algorithm from fluxbox */
 300                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 301                         dx = (float)(w - c->basew);
 302                         dy = (float)(h - c->baseh);
 303                         min = (float)(c->minax) / (float)(c->minay);
 304                         max = (float)(c->maxax) / (float)(c->maxay);
 305                         actual = dx / dy;
 306                         if(max > 0 && min > 0 && actual > 0) {
 307                                 if(actual < min) {
 308                                         dy = (dx * min + dy) / (min * min + 1);
 309                                         dx = dy * min;
 310                                         w = (int)dx + c->basew;
 311                                         h = (int)dy + c->baseh;
 312                                 }
 313                                 else if(actual > max) {
 314                                         dy = (dx * min + dy) / (max * max + 1);
 315                                         dx = dy * min;
 316                                         w = (int)dx + c->basew;
 317                                         h = (int)dy + c->baseh;
 318                                 }
 319                         }
 320                 }
 321                 if(c->incw)
 322                         w -= (w - c->basew) % c->incw;
 323                 if(c->inch)
 324                         h -= (h - c->baseh) % c->inch;
 325         }
 326         if(w == sw && h == sh)
 327                 c->border = 0;
 328         else
 329                 c->border = BORDERPX;
 330         /* offscreen appearance fixes */
 331         if(x > sw)
 332                 x = sw - w - 2 * c->border;
 333         if(y > sh)
 334                 y = sh - h - 2 * c->border;
 335         if(x + w + 2 * c->border < sx)
 336                 x = sx;
 337         if(y + h + 2 * c->border < sy)
 338                 y = sy;
 339         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 340                 c->x = wc.x = x;
 341                 c->y = wc.y = y;
 342                 c->w = wc.width = w;
 343                 c->h = wc.height = h;
 344                 wc.border_width = c->border;
 345                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 346                 configure(c);
 347                 XSync(dpy, False);
 348         }
 349 }
 350
 351 void
 352 updatesizehints(Client *c) {
 353         long msize;
 354         XSizeHints size;
 355
 356         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 357                 size.flags = PSize;
 358         c->flags = size.flags;
 359         if(c->flags & PBaseSize) {
 360                 c->basew = size.base_width;
 361                 c->baseh = size.base_height;
 362         }
 363         else
 364                 c->basew = c->baseh = 0;
 365         if(c->flags & PResizeInc) {
 366                 c->incw = size.width_inc;
 367                 c->inch = size.height_inc;
 368         }
 369         else
 370                 c->incw = c->inch = 0;
 371         if(c->flags & PMaxSize) {
 372                 c->maxw = size.max_width;
 373                 c->maxh = size.max_height;
 374         }
 375         else
 376                 c->maxw = c->maxh = 0;
 377         if(c->flags & PMinSize) {
 378                 c->minw = size.min_width;
 379                 c->minh = size.min_height;
 380         }
 381         else
 382                 c->minw = c->minh = 0;
 383         if(c->flags & PAspect) {
 384                 c->minax = size.min_aspect.x;
 385                 c->minay = size.min_aspect.y;
 386                 c->maxax = size.max_aspect.x;
 387                 c->maxay = size.max_aspect.y;
 388         }
 389         else
 390                 c->minax = c->minay = c->maxax = c->maxay = 0;
 391         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 392                         && c->maxw == c->minw && c->maxh == c->minh);
 393 }
 394
 395 void
 396 updatetitle(Client *c) {
 397         char **list = NULL;
 398         int n;
 399         XTextProperty name;
 400
 401         name.nitems = 0;
 402         c->name[0] = 0;
 403         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 404         if(!name.nitems)
 405                 XGetWMName(dpy, c->win, &name);
 406         if(!name.nitems)
 407                 return;
 408         if(name.encoding == XA_STRING)
 409                 strncpy(c->name, (char *)name.value, sizeof c->name);
 410         else {
 411                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 412                 && n > 0 && *list)
 413                 {
 414                         strncpy(c->name, *list, sizeof c->name);
 415                         XFreeStringList(list);
 416                 }
 417         }
 418         XFree(name.value);
 419 }
 420
 421 void
 422 unmanage(Client *c) {
 423         Client *nc;
 424
 425         /* The server grab construct avoids race conditions. */
 426         XGrabServer(dpy);
 427         XSetErrorHandler(xerrordummy);
 428         detach(c);
 429         detachstack(c);
 430         if(sel == c) {
 431                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 432                 focus(nc);
 433         }
 434         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 435         setclientstate(c, WithdrawnState);
 436         free(c->tags);
 437         free(c);
 438         XSync(dpy, False);
 439         XSetErrorHandler(xerror);
 440         XUngrabServer(dpy);
 441         arrange();
 442 }
 443
 444 void
 445 zoom(Arg *arg) {
 446         unsigned int n;
 447         Client *c;
 448
 449         if(!sel)
 450                 return;
 451         if(sel->isfloat || (arrange == dofloat)) {
 452                 togglemax(sel);
 453                 return;
 454         }
 455         for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
 456                 n++;
 457
 458         if((c = sel) == nexttiled(clients))
 459                 if(!(c = nexttiled(c->next)))
 460                         return;
 461         detach(c);
 462         attach(c);
 463         focus(c);
 464         arrange();
 465 }