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(Arg arg) {
 157         if(!sel)
 158                 return;
 159         if(isprotodel(sel))
 160                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 161         else
 162                 XKillClient(dpy, sel->win);
 163 }
 164
 165 void
 166 manage(Window w, XWindowAttributes *wa) {
 167         Client *c, *t;
 168         Window trans;
 169         XWindowChanges wc;
 170
 171         c = emallocz(sizeof(Client));
 172         c->tags = emallocz(ntags * sizeof(Bool));
 173         c->win = w;
 174         c->x = wa->x;
 175         c->y = wa->y;
 176         c->w = wa->width;
 177         c->h = wa->height;
 178         if(c->w == sw && c->h == sh) {
 179                 c->border = 0;
 180                 c->x = sx;
 181                 c->y = sy;
 182         }
 183         else {
 184                 c->border = BORDERPX;
 185                 if(c->x + c->w + 2 * c->border > wax + waw)
 186                         c->x = wax + waw - c->w - 2 * c->border;
 187                 if(c->y + c->h + 2 * c->border > way + wah)
 188                         c->y = way + wah - c->h - 2 * c->border;
 189                 if(c->x < wax)
 190                         c->x = wax;
 191                 if(c->y < way)
 192                         c->y = way;
 193         }
 194         updatesizehints(c);
 195         XSelectInput(dpy, w,
 196                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 197         XGetTransientForHint(dpy, w, &trans);
 198         grabbuttons(c, False);
 199         wc.border_width = c->border;
 200         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 201         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 202         configure(c); /* propagates border_width, if size doesn't change */
 203         updatetitle(c);
 204         for(t = clients; t && t->win != trans; t = t->next);
 205         settags(c, t);
 206         if(!c->isversatile)
 207                 c->isversatile = (t != NULL) || c->isfixed;
 208         attach(c);
 209         attachstack(c);
 210         c->isbanned = True;
 211         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 212         XMapWindow(dpy, w);
 213         setclientstate(c, NormalState);
 214         if(isvisible(c))
 215                 focus(c);
 216         lt->arrange();
 217 }
 218
 219 void
 220 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 221         float actual, dx, dy, max, min;
 222         XWindowChanges wc;
 223
 224         if(w <= 0 || h <= 0)
 225                 return;
 226         if(sizehints) {
 227                 if(c->minw && w < c->minw)
 228                         w = c->minw;
 229                 if(c->minh && h < c->minh)
 230                         h = c->minh;
 231                 if(c->maxw && w > c->maxw)
 232                         w = c->maxw;
 233                 if(c->maxh && h > c->maxh)
 234                         h = c->maxh;
 235                 /* inspired by algorithm from fluxbox */
 236                 if(c->minay > 0 && c->maxay && (h - c->baseh) > 0) {
 237                         dx = (float)(w - c->basew);
 238                         dy = (float)(h - c->baseh);
 239                         min = (float)(c->minax) / (float)(c->minay);
 240                         max = (float)(c->maxax) / (float)(c->maxay);
 241                         actual = dx / dy;
 242                         if(max > 0 && min > 0 && actual > 0) {
 243                                 if(actual < min) {
 244                                         dy = (dx * min + dy) / (min * min + 1);
 245                                         dx = dy * min;
 246                                         w = (int)dx + c->basew;
 247                                         h = (int)dy + c->baseh;
 248                                 }
 249                                 else if(actual > max) {
 250                                         dy = (dx * min + dy) / (max * max + 1);
 251                                         dx = dy * min;
 252                                         w = (int)dx + c->basew;
 253                                         h = (int)dy + c->baseh;
 254                                 }
 255                         }
 256                 }
 257                 if(c->incw)
 258                         w -= (w - c->basew) % c->incw;
 259                 if(c->inch)
 260                         h -= (h - c->baseh) % c->inch;
 261         }
 262         if(w == sw && h == sh)
 263                 c->border = 0;
 264         else
 265                 c->border = BORDERPX;
 266         /* offscreen appearance fixes */
 267         if(x > sw)
 268                 x = sw - w - 2 * c->border;
 269         if(y > sh)
 270                 y = sh - h - 2 * c->border;
 271         if(x + w + 2 * c->border < sx)
 272                 x = sx;
 273         if(y + h + 2 * c->border < sy)
 274                 y = sy;
 275         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 276                 c->x = wc.x = x;
 277                 c->y = wc.y = y;
 278                 c->w = wc.width = w;
 279                 c->h = wc.height = h;
 280                 wc.border_width = c->border;
 281                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 282                 configure(c);
 283                 XSync(dpy, False);
 284         }
 285 }
 286
 287 void
 288 toggleversatile(Arg arg) {
 289         if(!sel || lt->arrange == versatile)
 290                 return;
 291         sel->isversatile = !sel->isversatile;
 292         lt->arrange();
 293 }
 294
 295 void
 296 updatesizehints(Client *c) {
 297         long msize;
 298         XSizeHints size;
 299
 300         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 301                 size.flags = PSize;
 302         c->flags = size.flags;
 303         if(c->flags & PBaseSize) {
 304                 c->basew = size.base_width;
 305                 c->baseh = size.base_height;
 306         }
 307         else
 308                 c->basew = c->baseh = 0;
 309         if(c->flags & PResizeInc) {
 310                 c->incw = size.width_inc;
 311                 c->inch = size.height_inc;
 312         }
 313         else
 314                 c->incw = c->inch = 0;
 315         if(c->flags & PMaxSize) {
 316                 c->maxw = size.max_width;
 317                 c->maxh = size.max_height;
 318         }
 319         else
 320                 c->maxw = c->maxh = 0;
 321         if(c->flags & PMinSize) {
 322                 c->minw = size.min_width;
 323                 c->minh = size.min_height;
 324         }
 325         else
 326                 c->minw = c->minh = 0;
 327         if(c->flags & PAspect) {
 328                 c->minax = size.min_aspect.x;
 329                 c->minay = size.min_aspect.y;
 330                 c->maxax = size.max_aspect.x;
 331                 c->maxay = size.max_aspect.y;
 332         }
 333         else
 334                 c->minax = c->minay = c->maxax = c->maxay = 0;
 335         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 336                         && c->maxw == c->minw && c->maxh == c->minh);
 337 }
 338
 339 void
 340 updatetitle(Client *c) {
 341         char **list = NULL;
 342         int n;
 343         XTextProperty name;
 344
 345         name.nitems = 0;
 346         c->name[0] = 0;
 347         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 348         if(!name.nitems)
 349                 XGetWMName(dpy, c->win, &name);
 350         if(!name.nitems)
 351                 return;
 352         if(name.encoding == XA_STRING)
 353                 strncpy(c->name, (char *)name.value, sizeof c->name);
 354         else {
 355                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 356                 && n > 0 && *list)
 357                 {
 358                         strncpy(c->name, *list, sizeof c->name);
 359                         XFreeStringList(list);
 360                 }
 361         }
 362         XFree(name.value);
 363 }
 364
 365 void
 366 unmanage(Client *c) {
 367         Client *nc;
 368
 369         /* The server grab construct avoids race conditions. */
 370         XGrabServer(dpy);
 371         XSetErrorHandler(xerrordummy);
 372         detach(c);
 373         detachstack(c);
 374         if(sel == c) {
 375                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 376                 focus(nc);
 377         }
 378         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 379         setclientstate(c, WithdrawnState);
 380         free(c->tags);
 381         free(c);
 382         XSync(dpy, False);
 383         XSetErrorHandler(xerror);
 384         XUngrabServer(dpy);
 385         lt->arrange();
 386 }