client.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <X11/Xatom.h>
   6 #include <X11/Xutil.h>
   7
   8 /* static */
   9
  10 static char prop[128];
  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 ban(Client *c) {
 103         if(c->isbanned)
 104                 return;
 105         XUnmapWindow(dpy, c->win);
 106         setclientstate(c, IconicState);
 107         c->isbanned = True;
 108         c->unmapped++;
 109 }
 110
 111 void
 112 configure(Client *c) {
 113         XConfigureEvent ce;
 114
 115         ce.type = ConfigureNotify;
 116         ce.display = dpy;
 117         ce.event = c->win;
 118         ce.window = c->win;
 119         ce.x = c->x;
 120         ce.y = c->y;
 121         ce.width = c->w;
 122         ce.height = c->h;
 123         ce.border_width = c->border;
 124         ce.above = None;
 125         ce.override_redirect = False;
 126         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 127 }
 128
 129 void
 130 detach(Client *c) {
 131         if(c->prev)
 132                 c->prev->next = c->next;
 133         if(c->next)
 134                 c->next->prev = c->prev;
 135         if(c == clients)
 136                 clients = c->next;
 137         c->next = c->prev = NULL;
 138 }
 139
 140 void
 141 focus(Client *c) {
 142         if((!c && selscreen) || (c && !isvisible(c)))
 143                 for(c = stack; c && !isvisible(c); c = c->snext);
 144         if(sel && sel != c) {
 145                 grabbuttons(sel, False);
 146                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 147         }
 148         if(c) {
 149                 detachstack(c);
 150                 attachstack(c);
 151                 grabbuttons(c, True);
 152         }
 153         sel = c;
 154         drawstatus();
 155         if(!selscreen)
 156                 return;
 157         if(c) {
 158                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 159                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 160         }
 161         else
 162                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 163 }
 164
 165 void
 166 killclient(const char *arg) {
 167         XEvent ev;
 168
 169         if(!sel)
 170                 return;
 171         if(isprotodel(sel)) {
 172                 ev.type = ClientMessage;
 173                 ev.xclient.window = sel->win;
 174                 ev.xclient.message_type = wmatom[WMProtocols];
 175                 ev.xclient.format = 32;
 176                 ev.xclient.data.l[0] = wmatom[WMDelete];
 177                 ev.xclient.data.l[1] = CurrentTime;
 178                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 179         }
 180         else
 181                 XKillClient(dpy, sel->win);
 182 }
 183
 184 Bool
 185 getprops(Client *c) {
 186         unsigned int i;
 187         Bool result = False;
 188
 189         if(gettextprop(c->win, dwmprops, prop, sizeof prop)) {
 190                 for(i = 0; i < ntags && i < sizeof prop - 1 && prop[i] != '\0'; i++)
 191                         if((c->tags[i] = prop[i] == '1'))
 192                                 result = True;
 193                 if(i < sizeof prop - 1 && prop[i] != '\0')
 194                         c->isfloating = prop[i] == '1';
 195         }
 196         return result;
 197 }
 198
 199 void
 200 manage(Window w, XWindowAttributes *wa) {
 201         unsigned int i;
 202         Client *c, *t = NULL;
 203         Window trans;
 204         Status rettrans;
 205         XWindowChanges wc;
 206
 207         c = emallocz(sizeof(Client));
 208         c->tags = emallocz(ntags * sizeof(Bool));
 209         c->win = w;
 210         c->x = wa->x;
 211         c->y = wa->y;
 212         c->w = wa->width;
 213         c->h = wa->height;
 214         c->oldborder = wa->border_width;
 215         if(c->w == sw && c->h == sh) {
 216                 c->x = sx;
 217                 c->y = sy;
 218                 c->border = wa->border_width;
 219         }
 220         else {
 221                 if(c->x + c->w + 2 * c->border > wax + waw)
 222                         c->x = wax + waw - c->w - 2 * c->border;
 223                 if(c->y + c->h + 2 * c->border > way + wah)
 224                         c->y = way + wah - c->h - 2 * c->border;
 225                 if(c->x < wax)
 226                         c->x = wax;
 227                 if(c->y < way)
 228                         c->y = way;
 229                 c->border = BORDERPX;
 230         }
 231         wc.border_width = c->border;
 232         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 233         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 234         configure(c); /* propagates border_width, if size doesn't change */
 235         updatesizehints(c);
 236         XSelectInput(dpy, w,
 237                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 238         grabbuttons(c, False);
 239         updatetitle(c);
 240         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 241                 for(t = clients; t && t->win != trans; t = t->next);
 242         if(t)
 243                 for(i = 0; i < ntags; i++)
 244                         c->tags[i] = t->tags[i];
 245         if(!getprops(c))
 246                 applyrules(c);
 247         if(!c->isfloating)
 248                 c->isfloating = (rettrans == Success) || c->isfixed;
 249         setprops(c);
 250         attach(c);
 251         attachstack(c);
 252         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
 253         ban(c);
 254         arrange();
 255 }
 256
 257 void
 258 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 259         double dx, dy, max, min, ratio;
 260         XWindowChanges wc;
 261
 262         if(sizehints) {
 263                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
 264                         dx = (double)(w - c->basew);
 265                         dy = (double)(h - c->baseh);
 266                         min = (double)(c->minax) / (double)(c->minay);
 267                         max = (double)(c->maxax) / (double)(c->maxay);
 268                         ratio = dx / dy;
 269                         if(max > 0 && min > 0 && ratio > 0) {
 270                                 if(ratio < min) {
 271                                         dy = (dx * min + dy) / (min * min + 1);
 272                                         dx = dy * min;
 273                                         w = (int)dx + c->basew;
 274                                         h = (int)dy + c->baseh;
 275                                 }
 276                                 else if(ratio > max) {
 277                                         dy = (dx * min + dy) / (max * max + 1);
 278                                         dx = dy * min;
 279                                         w = (int)dx + c->basew;
 280                                         h = (int)dy + c->baseh;
 281                                 }
 282                         }
 283                 }
 284                 if(c->minw && w < c->minw)
 285                         w = c->minw;
 286                 if(c->minh && h < c->minh)
 287                         h = c->minh;
 288                 if(c->maxw && w > c->maxw)
 289                         w = c->maxw;
 290                 if(c->maxh && h > c->maxh)
 291                         h = c->maxh;
 292                 if(c->incw)
 293                         w -= (w - c->basew) % c->incw;
 294                 if(c->inch)
 295                         h -= (h - c->baseh) % c->inch;
 296         }
 297         if(w <= 0 || h <= 0)
 298                 return;
 299         /* offscreen appearance fixes */
 300         if(x > sw)
 301                 x = sw - w - 2 * c->border;
 302         if(y > sh)
 303                 y = sh - h - 2 * c->border;
 304         if(x + w + 2 * c->border < sx)
 305                 x = sx;
 306         if(y + h + 2 * c->border < sy)
 307                 y = sy;
 308         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 309                 c->x = wc.x = x;
 310                 c->y = wc.y = y;
 311                 c->w = wc.width = w;
 312                 c->h = wc.height = h;
 313                 wc.border_width = c->border;
 314                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 315                 configure(c);
 316                 XSync(dpy, False);
 317         }
 318 }
 319
 320 void
 321 setprops(Client *c) {
 322         unsigned int i;
 323
 324         for(i = 0; i < ntags && i < sizeof prop - 1; i++)
 325                 prop[i] = c->tags[i] ? '1' : '0';
 326         if(i < sizeof prop - 1)
 327                 prop[i++] = c->isfloating ? '1' : '0';
 328         prop[i] = '\0';
 329         XChangeProperty(dpy, c->win, dwmprops, XA_STRING, 8,
 330                         PropModeReplace, (unsigned char *)prop, i);
 331 }
 332
 333 void
 334 unban(Client *c) {
 335         if(!c->isbanned)
 336                 return;
 337         XMapWindow(dpy, c->win);
 338         setclientstate(c, NormalState);
 339         c->isbanned = False;
 340 }
 341
 342 void
 343 unmanage(Client *c, long state) {
 344         XWindowChanges wc;
 345
 346         wc.border_width = c->oldborder;
 347         /* The server grab construct avoids race conditions. */
 348         XGrabServer(dpy);
 349         XSetErrorHandler(xerrordummy);
 350         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 351         detach(c);
 352         detachstack(c);
 353         if(sel == c)
 354                 focus(NULL);
 355         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 356         setclientstate(c, state);
 357         free(c->tags);
 358         free(c);
 359         XSync(dpy, False);
 360         XSetErrorHandler(xerror);
 361         XUngrabServer(dpy);
 362         if(state != NormalState)
 363                 arrange();
 364 }
 365
 366 void
 367 updatesizehints(Client *c) {
 368         long msize;
 369         XSizeHints size;
 370
 371         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 372                 size.flags = PSize;
 373         c->flags = size.flags;
 374         if(c->flags & PBaseSize) {
 375                 c->basew = size.base_width;
 376                 c->baseh = size.base_height;
 377         }
 378         else if(c->flags & PMinSize) {
 379                 c->basew = size.min_width;
 380                 c->baseh = size.min_height;
 381         }
 382         else
 383                 c->basew = c->baseh = 0;
 384         if(c->flags & PResizeInc) {
 385                 c->incw = size.width_inc;
 386                 c->inch = size.height_inc;
 387         }
 388         else
 389                 c->incw = c->inch = 0;
 390         if(c->flags & PMaxSize) {
 391                 c->maxw = size.max_width;
 392                 c->maxh = size.max_height;
 393         }
 394         else
 395                 c->maxw = c->maxh = 0;
 396         if(c->flags & PMinSize) {
 397                 c->minw = size.min_width;
 398                 c->minh = size.min_height;
 399         }
 400         else if(c->flags & PBaseSize) {
 401                 c->minw = size.base_width;
 402                 c->minh = size.base_height;
 403         }
 404         else
 405                 c->minw = c->minh = 0;
 406         if(c->flags & PAspect) {
 407                 c->minax = size.min_aspect.x;
 408                 c->maxax = size.max_aspect.x;
 409                 c->minay = size.min_aspect.y;
 410                 c->maxay = size.max_aspect.y;
 411         }
 412         else
 413                 c->minax = c->maxax = c->minay = c->maxay = 0;
 414         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 415                         && c->maxw == c->minw && c->maxh == c->minh);
 416 }
 417
 418 void
 419 updatetitle(Client *c) {
 420         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
 421                 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
 422 }