client.c

   1 /* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
   3  * See LICENSE file for license details. */
   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 focustopvisible(void) {
 157         Client *c;
 158
 159         for(c = stack; c && !isvisible(c); c = c->snext);
 160         focus(c);
 161 }
 162
 163 void
 164 killclient(const char *arg) {
 165         XEvent ev;
 166
 167         if(!sel)
 168                 return;
 169         if(isprotodel(sel)) {
 170                 ev.type = ClientMessage;
 171                 ev.xclient.window = sel->win;
 172                 ev.xclient.message_type = wmatom[WMProtocols];
 173                 ev.xclient.format = 32;
 174                 ev.xclient.data.l[0] = wmatom[WMDelete];
 175                 ev.xclient.data.l[1] = CurrentTime;
 176                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 177         }
 178         else
 179                 XKillClient(dpy, sel->win);
 180 }
 181
 182 void
 183 manage(Window w, XWindowAttributes *wa) {
 184         Client *c, *t = NULL;
 185         Window trans;
 186         Status rettrans;
 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         c->oldborder = wa->border_width;
 197         if(c->w == sw && c->h == sh) {
 198                 c->x = sx;
 199                 c->y = sy;
 200                 c->border = wa->border_width;
 201         }
 202         else {
 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                 c->border = BORDERPX;
 212         }
 213         wc.border_width = c->border;
 214         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 215         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 216         configure(c); /* propagates border_width, if size doesn't change */
 217         updatesizehints(c);
 218         XSelectInput(dpy, w,
 219                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 220         grabbuttons(c, False);
 221         updatetitle(c);
 222         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 223                 for(t = clients; t && t->win != trans; t = t->next);
 224         settags(c, t);
 225         if(!c->isfloating)
 226                 c->isfloating = (rettrans == Success) || c->isfixed;
 227         attach(c);
 228         attachstack(c);
 229         c->isbanned = True;
 230         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 231         XMapWindow(dpy, w);
 232         setclientstate(c, NormalState);
 233         if(isvisible(c))
 234                 focus(c);
 235         lt->arrange();
 236 }
 237
 238 void
 239 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 240         float dx, dy, max, min, ratio;
 241         XWindowChanges wc;
 242
 243         if(w <= 0 || h <= 0)
 244                 return;
 245         if(sizehints) {
 246                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0) {
 247                         dx = (float)(w - c->basew);
 248                         dy = (float)(h - c->baseh);
 249                         min = (float)(c->minax) / (float)(c->minay);
 250                         max = (float)(c->maxax) / (float)(c->maxay);
 251                         ratio = dx / dy;
 252                         if(max > 0 && min > 0 && ratio > 0) {
 253                                 if(ratio < min) {
 254                                         dy = (dx * min + dy) / (min * min + 1);
 255                                         dx = dy * min;
 256                                         w = (int)dx + c->basew;
 257                                         h = (int)dy + c->baseh;
 258                                 }
 259                                 else if(ratio > max) {
 260                                         dy = (dx * min + dy) / (max * max + 1);
 261                                         dx = dy * min;
 262                                         w = (int)dx + c->basew;
 263                                         h = (int)dy + c->baseh;
 264                                 }
 265                         }
 266                 }
 267                 if(c->minw && w < c->minw)
 268                         w = c->minw;
 269                 if(c->minh && h < c->minh)
 270                         h = c->minh;
 271                 if(c->maxw && w > c->maxw)
 272                         w = c->maxw;
 273                 if(c->maxh && h > c->maxh)
 274                         h = c->maxh;
 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 <= 0 || h <= 0)
 281                 return;
 282         /* offscreen appearance fixes */
 283         if(x > sw)
 284                 x = sw - w - 2 * c->border;
 285         if(y > sh)
 286                 y = sh - h - 2 * c->border;
 287         if(x + w + 2 * c->border < sx)
 288                 x = sx;
 289         if(y + h + 2 * c->border < sy)
 290                 y = sy;
 291         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 292                 c->x = wc.x = x;
 293                 c->y = wc.y = y;
 294                 c->w = wc.width = w;
 295                 c->h = wc.height = h;
 296                 wc.border_width = c->border;
 297                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 298                 configure(c);
 299                 XSync(dpy, False);
 300         }
 301 }
 302
 303 void
 304 togglefloating(const char *arg) {
 305         if(!sel || lt->arrange == floating)
 306                 return;
 307         sel->isfloating = !sel->isfloating || sel->isfixed;
 308         lt->arrange();
 309 }
 310
 311 void
 312 updatesizehints(Client *c) {
 313         long msize;
 314         XSizeHints size;
 315
 316         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 317                 size.flags = PSize;
 318         c->flags = size.flags;
 319         if(c->flags & PBaseSize) {
 320                 c->basew = size.base_width;
 321                 c->baseh = size.base_height;
 322         }
 323         else if(c->flags & PMinSize) {
 324                 c->basew = size.min_width;
 325                 c->baseh = size.min_height;
 326         }
 327         else
 328                 c->basew = c->baseh = 0;
 329         if(c->flags & PResizeInc) {
 330                 c->incw = size.width_inc;
 331                 c->inch = size.height_inc;
 332         }
 333         else
 334                 c->incw = c->inch = 0;
 335         if(c->flags & PMaxSize) {
 336                 c->maxw = size.max_width;
 337                 c->maxh = size.max_height;
 338         }
 339         else
 340                 c->maxw = c->maxh = 0;
 341         if(c->flags & PMinSize) {
 342                 c->minw = size.min_width;
 343                 c->minh = size.min_height;
 344         }
 345         else if(c->flags & PBaseSize) {
 346                 c->minw = size.base_width;
 347                 c->minh = size.base_height;
 348         }
 349         else
 350                 c->minw = c->minh = 0;
 351         if(c->flags & PAspect) {
 352                 c->minax = size.min_aspect.x;
 353                 c->maxax = size.max_aspect.x;
 354                 c->minay = size.min_aspect.y;
 355                 c->maxay = size.max_aspect.y;
 356         }
 357         else
 358                 c->minax = c->maxax = c->minay = c->maxay = 0;
 359         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 360                         && c->maxw == c->minw && c->maxh == c->minh);
 361 }
 362
 363 void
 364 updatetitle(Client *c) {
 365         char **list = NULL;
 366         int n;
 367         XTextProperty name;
 368
 369         name.nitems = 0;
 370         c->name[0] = 0;
 371         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 372         if(!name.nitems)
 373                 XGetWMName(dpy, c->win, &name);
 374         if(!name.nitems)
 375                 return;
 376         if(name.encoding == XA_STRING)
 377                 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
 378         else {
 379                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 380                 && n > 0 && *list)
 381                 {
 382                         strncpy(c->name, *list, sizeof c->name - 1);
 383                         XFreeStringList(list);
 384                 }
 385         }
 386         c->name[sizeof c->name - 1] = '\0';
 387         XFree(name.value);
 388 }
 389
 390 void
 391 unmanage(Client *c) {
 392         XWindowChanges wc;
 393
 394         wc.border_width = c->oldborder;
 395         /* The server grab construct avoids race conditions. */
 396         XGrabServer(dpy);
 397         XSetErrorHandler(xerrordummy);
 398         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 399         detach(c);
 400         detachstack(c);
 401         if(sel == c)
 402                 focustopvisible();
 403         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 404         setclientstate(c, WithdrawnState);
 405         free(c->tags);
 406         free(c);
 407         XSync(dpy, False);
 408         XSetErrorHandler(xerror);
 409         XUngrabServer(dpy);
 410         lt->arrange();
 411 }