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 killclient(Arg *arg) {
 175         if(!sel)
 176                 return;
 177         if(isprotodel(sel))
 178                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 179         else
 180                 XKillClient(dpy, sel->win);
 181 }
 182
 183 void
 184 manage(Window w, XWindowAttributes *wa) {
 185         Client *c, *t;
 186         Window trans;
 187         XWindowChanges wc;
 188
 189         c = emallocz(sizeof(Client));
 190         c->tags = emallocz(ntags * sizeof(Bool));
 191         c->win = w;
 192         c->x = wa->x;
 193         c->y = wa->y;
 194         c->w = wa->width;
 195         c->h = wa->height;
 196         if(c->w == sw && c->h == sh) {
 197                 c->border = 0;
 198                 c->x = sx;
 199                 c->y = sy;
 200         }
 201         else {
 202                 c->border = BORDERPX;
 203                 if(c->x + c->w + 2 * c->border > wax + waw)
 204                         c->x = wax + waw - c->w - 2 * c->border;
 205                 if(c->y + c->h + 2 * c->border > way + wah)
 206                         c->y = way + wah - c->h - 2 * c->border;
 207                 if(c->x < wax)
 208                         c->x = wax;
 209                 if(c->y < way)
 210                         c->y = way;
 211         }
 212         updatesizehints(c);
 213         XSelectInput(dpy, w,
 214                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 215         XGetTransientForHint(dpy, w, &trans);
 216         grabbuttons(c, False);
 217         wc.border_width = c->border;
 218         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 219         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 220         configure(c); /* propagates border_width, if size doesn't change */
 221         updatetitle(c);
 222         for(t = clients; t && t->win != trans; t = t->next);
 223         settags(c, t);
 224         if(!c->isversatile)
 225                 c->isversatile = (t != NULL) || c->isfixed;
 226         attach(c);
 227         attachstack(c);
 228         c->isbanned = True;
 229         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 230         XMapWindow(dpy, w);
 231         setclientstate(c, NormalState);
 232         if(isvisible(c))
 233                 focus(c);
 234         lt->arrange();
 235 }
 236
 237 void
 238 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 239         float actual, dx, dy, max, min;
 240         XWindowChanges wc;
 241
 242         if(w <= 0 || h <= 0)
 243                 return;
 244         if(sizehints) {
 245                 if(c->minw && w < c->minw)
 246                         w = c->minw;
 247                 if(c->minh && h < c->minh)
 248                         h = c->minh;
 249                 if(c->maxw && w > c->maxw)
 250                         w = c->maxw;
 251                 if(c->maxh && h > c->maxh)
 252                         h = c->maxh;
 253                 /* inspired by algorithm from fluxbox */
 254                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 255                         dx = (float)(w - c->basew);
 256                         dy = (float)(h - c->baseh);
 257                         min = (float)(c->minax) / (float)(c->minay);
 258                         max = (float)(c->maxax) / (float)(c->maxay);
 259                         actual = dx / dy;
 260                         if(max > 0 && min > 0 && actual > 0) {
 261                                 if(actual < min) {
 262                                         dy = (dx * min + dy) / (min * min + 1);
 263                                         dx = dy * min;
 264                                         w = (int)dx + c->basew;
 265                                         h = (int)dy + c->baseh;
 266                                 }
 267                                 else if(actual > max) {
 268                                         dy = (dx * min + dy) / (max * max + 1);
 269                                         dx = dy * min;
 270                                         w = (int)dx + c->basew;
 271                                         h = (int)dy + c->baseh;
 272                                 }
 273                         }
 274                 }
 275                 if(c->incw)
 276                         w -= (w - c->basew) % c->incw;
 277                 if(c->inch)
 278                         h -= (h - c->baseh) % c->inch;
 279         }
 280         if(w == sw && h == sh)
 281                 c->border = 0;
 282         else
 283                 c->border = BORDERPX;
 284         /* offscreen appearance fixes */
 285         if(x > sw)
 286                 x = sw - w - 2 * c->border;
 287         if(y > sh)
 288                 y = sh - h - 2 * c->border;
 289         if(x + w + 2 * c->border < sx)
 290                 x = sx;
 291         if(y + h + 2 * c->border < sy)
 292                 y = sy;
 293         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 294                 c->x = wc.x = x;
 295                 c->y = wc.y = y;
 296                 c->w = wc.width = w;
 297                 c->h = wc.height = h;
 298                 wc.border_width = c->border;
 299                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 300                 configure(c);
 301                 XSync(dpy, False);
 302         }
 303 }
 304
 305 void
 306 toggleversatile(Arg *arg) {
 307         if(!sel || lt->arrange == versatile)
 308                 return;
 309         sel->isversatile = !sel->isversatile;
 310         lt->arrange();
 311 }
 312
 313 void
 314 updatesizehints(Client *c) {
 315         long msize;
 316         XSizeHints size;
 317
 318         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 319                 size.flags = PSize;
 320         c->flags = size.flags;
 321         if(c->flags & PBaseSize) {
 322                 c->basew = size.base_width;
 323                 c->baseh = size.base_height;
 324         }
 325         else
 326                 c->basew = c->baseh = 0;
 327         if(c->flags & PResizeInc) {
 328                 c->incw = size.width_inc;
 329                 c->inch = size.height_inc;
 330         }
 331         else
 332                 c->incw = c->inch = 0;
 333         if(c->flags & PMaxSize) {
 334                 c->maxw = size.max_width;
 335                 c->maxh = size.max_height;
 336         }
 337         else
 338                 c->maxw = c->maxh = 0;
 339         if(c->flags & PMinSize) {
 340                 c->minw = size.min_width;
 341                 c->minh = size.min_height;
 342         }
 343         else
 344                 c->minw = c->minh = 0;
 345         if(c->flags & PAspect) {
 346                 c->minax = size.min_aspect.x;
 347                 c->minay = size.min_aspect.y;
 348                 c->maxax = size.max_aspect.x;
 349                 c->maxay = size.max_aspect.y;
 350         }
 351         else
 352                 c->minax = c->minay = c->maxax = c->maxay = 0;
 353         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 354                         && c->maxw == c->minw && c->maxh == c->minh);
 355 }
 356
 357 void
 358 updatetitle(Client *c) {
 359         char **list = NULL;
 360         int n;
 361         XTextProperty name;
 362
 363         name.nitems = 0;
 364         c->name[0] = 0;
 365         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 366         if(!name.nitems)
 367                 XGetWMName(dpy, c->win, &name);
 368         if(!name.nitems)
 369                 return;
 370         if(name.encoding == XA_STRING)
 371                 strncpy(c->name, (char *)name.value, sizeof c->name);
 372         else {
 373                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 374                 && n > 0 && *list)
 375                 {
 376                         strncpy(c->name, *list, sizeof c->name);
 377                         XFreeStringList(list);
 378                 }
 379         }
 380         XFree(name.value);
 381 }
 382
 383 void
 384 unmanage(Client *c) {
 385         Client *nc;
 386
 387         /* The server grab construct avoids race conditions. */
 388         XGrabServer(dpy);
 389         XSetErrorHandler(xerrordummy);
 390         detach(c);
 391         detachstack(c);
 392         if(sel == c) {
 393                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 394                 focus(nc);
 395         }
 396         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 397         setclientstate(c, WithdrawnState);
 398         free(c->tags);
 399         free(c);
 400         XSync(dpy, False);
 401         XSetErrorHandler(xerror);
 402         XUngrabServer(dpy);
 403         lt->arrange();
 404 }
 405
 406 void
 407 zoom(Arg *arg) {
 408         unsigned int n;
 409         Client *c;
 410
 411         if(!sel)
 412                 return;
 413         if(sel->isversatile || (lt->arrange == versatile)) {
 414                 togglemax(sel);
 415                 return;
 416         }
 417         for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
 418                 n++;
 419         if((c = sel) == nexttiled(clients))
 420                 if(!(c = nexttiled(c->next)))
 421                         return;
 422         detach(c);
 423         attach(c);
 424         focus(c);
 425         lt->arrange();
 426 }