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 int
  87 xerrordummy(Display *dsply, XErrorEvent *ee) {
  88         return 0;
  89 }
  90
  91 /* extern */
  92
  93 void
  94 attach(Client *c) {
  95         if(clients)
  96                 clients->prev = c;
  97         c->next = clients;
  98         clients = c;
  99 }
 100
 101 void
 102 configure(Client *c) {
 103         XConfigureEvent ce;
 104
 105         ce.type = ConfigureNotify;
 106         ce.display = dpy;
 107         ce.event = c->win;
 108         ce.window = c->win;
 109         ce.x = c->x;
 110         ce.y = c->y;
 111         ce.width = c->w;
 112         ce.height = c->h;
 113         ce.border_width = c->border;
 114         ce.above = None;
 115         ce.override_redirect = False;
 116         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 117 }
 118
 119 void
 120 detach(Client *c) {
 121         if(c->prev)
 122                 c->prev->next = c->next;
 123         if(c->next)
 124                 c->next->prev = c->prev;
 125         if(c == clients)
 126                 clients = c->next;
 127         c->next = c->prev = NULL;
 128 }
 129
 130 void
 131 focus(Client *c) {
 132         if(c && !isvisible(c))
 133                 return;
 134         if(sel && sel != c) {
 135                 grabbuttons(sel, False);
 136                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 137         }
 138         if(c) {
 139                 detachstack(c);
 140                 attachstack(c);
 141                 grabbuttons(c, True);
 142         }
 143         sel = c;
 144         drawstatus();
 145         if(!selscreen)
 146                 return;
 147         if(c) {
 148                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 149                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 150         }
 151         else
 152                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 153 }
 154
 155 void
 156 killclient(const char *arg) {
 157         XEvent ev;
 158
 159         if(!sel)
 160                 return;
 161         if(isprotodel(sel)) {
 162                 ev.type = ClientMessage;
 163                 ev.xclient.window = sel->win;
 164                 ev.xclient.message_type = wmatom[WMProtocols];
 165                 ev.xclient.format = 32;
 166                 ev.xclient.data.l[0] = wmatom[WMDelete];
 167                 ev.xclient.data.l[1] = CurrentTime;
 168                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 169         }
 170         else
 171                 XKillClient(dpy, sel->win);
 172 }
 173
 174 void
 175 manage(Window w, XWindowAttributes *wa) {
 176         Client *c, *t;
 177         Window trans;
 178         XWindowChanges wc;
 179
 180         c = emallocz(sizeof(Client));
 181         c->tags = emallocz(ntags * sizeof(Bool));
 182         c->win = w;
 183         c->x = wa->x;
 184         c->y = wa->y;
 185         c->w = wa->width;
 186         c->h = wa->height;
 187         if(c->w == sw && c->h == sh) {
 188                 c->border = 0;
 189                 c->x = sx;
 190                 c->y = sy;
 191         }
 192         else {
 193                 c->border = BORDERPX;
 194                 if(c->x + c->w + 2 * c->border > wax + waw)
 195                         c->x = wax + waw - c->w - 2 * c->border;
 196                 if(c->y + c->h + 2 * c->border > way + wah)
 197                         c->y = way + wah - c->h - 2 * c->border;
 198                 if(c->x < wax)
 199                         c->x = wax;
 200                 if(c->y < way)
 201                         c->y = way;
 202         }
 203         updatesizehints(c);
 204         XSelectInput(dpy, w,
 205                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 206         XGetTransientForHint(dpy, w, &trans);
 207         grabbuttons(c, False);
 208         wc.border_width = c->border;
 209         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 210         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 211         configure(c); /* propagates border_width, if size doesn't change */
 212         updatetitle(c);
 213         for(t = clients; t && t->win != trans; t = t->next);
 214         settags(c, t);
 215         if(!c->isfloating)
 216                 c->isfloating = (t != NULL) || c->isfixed;
 217         attach(c);
 218         attachstack(c);
 219         c->isbanned = True;
 220         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 221         XMapWindow(dpy, w);
 222         setclientstate(c, NormalState);
 223         if(isvisible(c))
 224                 focus(c);
 225         lt->arrange();
 226 }
 227
 228 void
 229 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 230         float actual, dx, dy, max, min;
 231         XWindowChanges wc;
 232
 233         if(w <= 0 || h <= 0)
 234                 return;
 235         if(sizehints) {
 236                 if(c->minw && w < c->minw)
 237                         w = c->minw;
 238                 if(c->minh && h < c->minh)
 239                         h = c->minh;
 240                 if(c->maxw && w > c->maxw)
 241                         w = c->maxw;
 242                 if(c->maxh && h > c->maxh)
 243                         h = c->maxh;
 244                 /* inspired by algorithm from fluxbox */
 245                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 246                         dx = (float)(w - c->basew);
 247                         dy = (float)(h - c->baseh);
 248                         min = (float)(c->minax) / (float)(c->minay);
 249                         max = (float)(c->maxax) / (float)(c->maxay);
 250                         actual = dx / dy;
 251                         if(max > 0 && min > 0 && actual > 0) {
 252                                 if(actual < min) {
 253                                         dy = (dx * min + dy) / (min * min + 1);
 254                                         dx = dy * min;
 255                                         w = (int)dx + c->basew;
 256                                         h = (int)dy + c->baseh;
 257                                 }
 258                                 else if(actual > max) {
 259                                         dy = (dx * min + dy) / (max * max + 1);
 260                                         dx = dy * min;
 261                                         w = (int)dx + c->basew;
 262                                         h = (int)dy + c->baseh;
 263                                 }
 264                         }
 265                 }
 266                 if(c->incw)
 267                         w -= (w - c->basew) % c->incw;
 268                 if(c->inch)
 269                         h -= (h - c->baseh) % c->inch;
 270         }
 271         if(w == sw && h == sh)
 272                 c->border = 0;
 273         else
 274                 c->border = BORDERPX;
 275         /* offscreen appearance fixes */
 276         if(x > sw)
 277                 x = sw - w - 2 * c->border;
 278         if(y > sh)
 279                 y = sh - h - 2 * c->border;
 280         if(x + w + 2 * c->border < sx)
 281                 x = sx;
 282         if(y + h + 2 * c->border < sy)
 283                 y = sy;
 284         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 285                 c->x = wc.x = x;
 286                 c->y = wc.y = y;
 287                 c->w = wc.width = w;
 288                 c->h = wc.height = h;
 289                 wc.border_width = c->border;
 290                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 291                 configure(c);
 292                 XSync(dpy, False);
 293         }
 294 }
 295
 296 void
 297 togglefloating(const char *arg) {
 298         if(!sel || lt->arrange == floating)
 299                 return;
 300         sel->isfloating = !sel->isfloating;
 301         lt->arrange();
 302 }
 303
 304 void
 305 updatesizehints(Client *c) {
 306         long msize;
 307         XSizeHints size;
 308
 309         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 310                 size.flags = PSize;
 311         c->flags = size.flags;
 312         if(c->flags & PBaseSize) {
 313                 c->basew = size.base_width;
 314                 c->baseh = size.base_height;
 315         }
 316         else
 317                 c->basew = c->baseh = 0;
 318         if(c->flags & PResizeInc) {
 319                 c->incw = size.width_inc;
 320                 c->inch = size.height_inc;
 321         }
 322         else
 323                 c->incw = c->inch = 0;
 324         if(c->flags & PMaxSize) {
 325                 c->maxw = size.max_width;
 326                 c->maxh = size.max_height;
 327         }
 328         else
 329                 c->maxw = c->maxh = 0;
 330         if(c->flags & PMinSize) {
 331                 c->minw = size.min_width;
 332                 c->minh = size.min_height;
 333         }
 334         else
 335                 c->minw = c->minh = 0;
 336         if(c->flags & PAspect) {
 337                 c->minax = size.min_aspect.x;
 338                 c->minay = size.min_aspect.y;
 339                 c->maxax = size.max_aspect.x;
 340                 c->maxay = size.max_aspect.y;
 341         }
 342         else
 343                 c->minax = c->minay = c->maxax = c->maxay = 0;
 344         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 345                         && c->maxw == c->minw && c->maxh == c->minh);
 346 }
 347
 348 void
 349 updatetitle(Client *c) {
 350         char **list = NULL;
 351         int n;
 352         XTextProperty name;
 353
 354         name.nitems = 0;
 355         c->name[0] = 0;
 356         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 357         if(!name.nitems)
 358                 XGetWMName(dpy, c->win, &name);
 359         if(!name.nitems)
 360                 return;
 361         if(name.encoding == XA_STRING)
 362                 strncpy(c->name, (char *)name.value, sizeof c->name);
 363         else {
 364                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 365                 && n > 0 && *list)
 366                 {
 367                         strncpy(c->name, *list, sizeof c->name);
 368                         XFreeStringList(list);
 369                 }
 370         }
 371         XFree(name.value);
 372 }
 373
 374 void
 375 unmanage(Client *c) {
 376         Client *nc;
 377
 378         /* The server grab construct avoids race conditions. */
 379         XGrabServer(dpy);
 380         XSetErrorHandler(xerrordummy);
 381         detach(c);
 382         detachstack(c);
 383         if(sel == c) {
 384                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 385                 focus(nc);
 386         }
 387         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 388         setclientstate(c, WithdrawnState);
 389         free(c->tags);
 390         free(c);
 391         XSync(dpy, False);
 392         XSetErrorHandler(xerror);
 393         XUngrabServer(dpy);
 394         lt->arrange();
 395 }