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  * © 2007 Premysl Hruby <dfenze at gmail dot com>
   4  * © 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
   5  * See LICENSE file for license details. */
   6 #include "dwm.h"
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xutil.h>
  11
  12 /* static */
  13
  14 static void
  15 attachstack(Client *c) {
  16         c->snext = stack;
  17         stack = c;
  18 }
  19
  20 static void
  21 detachstack(Client *c) {
  22         Client **tc;
  23
  24         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  25         *tc = c->snext;
  26 }
  27
  28 static void
  29 grabbuttons(Client *c, Bool focused) {
  30         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  31
  32         if(focused) {
  33                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  34                                 GrabModeAsync, GrabModeSync, None, None);
  35                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  36                                 GrabModeAsync, GrabModeSync, None, None);
  37                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  38                                 GrabModeAsync, GrabModeSync, None, None);
  39                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  40                                 GrabModeAsync, GrabModeSync, None, None);
  41
  42                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  43                                 GrabModeAsync, GrabModeSync, None, None);
  44                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  45                                 GrabModeAsync, GrabModeSync, None, None);
  46                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  47                                 GrabModeAsync, GrabModeSync, None, None);
  48                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  49                                 GrabModeAsync, GrabModeSync, None, None);
  50
  51                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  52                                 GrabModeAsync, GrabModeSync, None, None);
  53                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  54                                 GrabModeAsync, GrabModeSync, None, None);
  55                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  56                                 GrabModeAsync, GrabModeSync, None, None);
  57                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  58                                 GrabModeAsync, GrabModeSync, None, None);
  59         }
  60         else
  61                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  62                                 GrabModeAsync, GrabModeSync, None, None);
  63 }
  64
  65 static Bool
  66 isprotodel(Client *c) {
  67         int i, n;
  68         Atom *protocols;
  69         Bool ret = False;
  70
  71         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  72                 for(i = 0; !ret && i < n; i++)
  73                         if(protocols[i] == wmatom[WMDelete])
  74                                 ret = True;
  75                 XFree(protocols);
  76         }
  77         return ret;
  78 }
  79
  80 static void
  81 setclientstate(Client *c, long state) {
  82         long data[] = {state, None};
  83
  84         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  85                         PropModeReplace, (unsigned char *)data, 2);
  86 }
  87
  88 static int
  89 xerrordummy(Display *dsply, XErrorEvent *ee) {
  90         return 0;
  91 }
  92
  93 /* extern */
  94
  95 void
  96 attach(Client *c) {
  97         if(clients)
  98                 clients->prev = c;
  99         c->next = clients;
 100         clients = c;
 101 }
 102
 103 void
 104 configure(Client *c) {
 105         XConfigureEvent ce;
 106
 107         ce.type = ConfigureNotify;
 108         ce.display = dpy;
 109         ce.event = c->win;
 110         ce.window = c->win;
 111         ce.x = c->x;
 112         ce.y = c->y;
 113         ce.width = c->w;
 114         ce.height = c->h;
 115         ce.border_width = c->border;
 116         ce.above = None;
 117         ce.override_redirect = False;
 118         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 119 }
 120
 121 void
 122 detach(Client *c) {
 123         if(c->prev)
 124                 c->prev->next = c->next;
 125         if(c->next)
 126                 c->next->prev = c->prev;
 127         if(c == clients)
 128                 clients = c->next;
 129         c->next = c->prev = NULL;
 130 }
 131
 132 void
 133 focus(Client *c) {
 134         if( !c && selscreen || c && !isvisible(c))
 135                 for(c = stack; c && !isvisible(c); c = c->snext);
 136         if(sel && sel != c) {
 137                 grabbuttons(sel, False);
 138                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 139         }
 140         if(c) {
 141                 detachstack(c);
 142                 attachstack(c);
 143                 grabbuttons(c, True);
 144         }
 145         sel = c;
 146         drawstatus();
 147         if(!selscreen)
 148                 return;
 149         if(c) {
 150                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 151                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 152         }
 153         else
 154                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 155 }
 156
 157 void
 158 killclient(const char *arg) {
 159         XEvent ev;
 160
 161         if(!sel)
 162                 return;
 163         if(isprotodel(sel)) {
 164                 ev.type = ClientMessage;
 165                 ev.xclient.window = sel->win;
 166                 ev.xclient.message_type = wmatom[WMProtocols];
 167                 ev.xclient.format = 32;
 168                 ev.xclient.data.l[0] = wmatom[WMDelete];
 169                 ev.xclient.data.l[1] = CurrentTime;
 170                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 171         }
 172         else
 173                 XKillClient(dpy, sel->win);
 174 }
 175
 176 void
 177 manage(Window w, XWindowAttributes *wa) {
 178         Client *c, *t = NULL;
 179         Window trans;
 180         Status rettrans;
 181         XWindowChanges wc;
 182
 183         c = emallocz(sizeof(Client));
 184         c->tags = emallocz(ntags * sizeof(Bool));
 185         c->win = w;
 186         c->x = wa->x;
 187         c->y = wa->y;
 188         c->w = wa->width;
 189         c->h = wa->height;
 190         c->oldborder = wa->border_width;
 191         if(c->w == sw && c->h == sh) {
 192                 c->x = sx;
 193                 c->y = sy;
 194                 c->border = wa->border_width;
 195         }
 196         else {
 197                 if(c->x + c->w + 2 * c->border > wax + waw)
 198                         c->x = wax + waw - c->w - 2 * c->border;
 199                 if(c->y + c->h + 2 * c->border > way + wah)
 200                         c->y = way + wah - c->h - 2 * c->border;
 201                 if(c->x < wax)
 202                         c->x = wax;
 203                 if(c->y < way)
 204                         c->y = way;
 205                 c->border = BORDERPX;
 206         }
 207         wc.border_width = c->border;
 208         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 209         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 210         configure(c); /* propagates border_width, if size doesn't change */
 211         updatesizehints(c);
 212         XSelectInput(dpy, w,
 213                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 214         grabbuttons(c, False);
 215         updatetitle(c);
 216         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 217                 for(t = clients; t && t->win != trans; t = t->next);
 218         settags(c, t);
 219         if(!c->isfloating)
 220                 c->isfloating = (rettrans == Success) || c->isfixed;
 221         attach(c);
 222         attachstack(c);
 223         c->isbanned = True;
 224         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 225         XMapWindow(dpy, w);
 226         setclientstate(c, NormalState);
 227         focus(c);
 228         lt->arrange();
 229 }
 230
 231 void
 232 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 233         float dx, dy, max, min, ratio;
 234         XWindowChanges wc;
 235
 236         if(w <= 0 || h <= 0)
 237                 return;
 238         if(sizehints) {
 239                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0) {
 240                         dx = (float)(w - c->basew);
 241                         dy = (float)(h - c->baseh);
 242                         min = (float)(c->minax) / (float)(c->minay);
 243                         max = (float)(c->maxax) / (float)(c->maxay);
 244                         ratio = dx / dy;
 245                         if(max > 0 && min > 0 && ratio > 0) {
 246                                 if(ratio < min) {
 247                                         dy = (dx * min + dy) / (min * min + 1);
 248                                         dx = dy * min;
 249                                         w = (int)dx + c->basew;
 250                                         h = (int)dy + c->baseh;
 251                                 }
 252                                 else if(ratio > max) {
 253                                         dy = (dx * min + dy) / (max * max + 1);
 254                                         dx = dy * min;
 255                                         w = (int)dx + c->basew;
 256                                         h = (int)dy + c->baseh;
 257                                 }
 258                         }
 259                 }
 260                 if(c->minw && w < c->minw)
 261                         w = c->minw;
 262                 if(c->minh && h < c->minh)
 263                         h = c->minh;
 264                 if(c->maxw && w > c->maxw)
 265                         w = c->maxw;
 266                 if(c->maxh && h > c->maxh)
 267                         h = c->maxh;
 268                 if(c->incw)
 269                         w -= (w - c->basew) % c->incw;
 270                 if(c->inch)
 271                         h -= (h - c->baseh) % c->inch;
 272         }
 273         if(w <= 0 || h <= 0)
 274                 return;
 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         if(sel->isfloating)
 302                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
 303         lt->arrange();
 304 }
 305
 306 void
 307 updatesizehints(Client *c) {
 308         long msize;
 309         XSizeHints size;
 310
 311         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 312                 size.flags = PSize;
 313         c->flags = size.flags;
 314         if(c->flags & PBaseSize) {
 315                 c->basew = size.base_width;
 316                 c->baseh = size.base_height;
 317         }
 318         else if(c->flags & PMinSize) {
 319                 c->basew = size.min_width;
 320                 c->baseh = size.min_height;
 321         }
 322         else
 323                 c->basew = c->baseh = 0;
 324         if(c->flags & PResizeInc) {
 325                 c->incw = size.width_inc;
 326                 c->inch = size.height_inc;
 327         }
 328         else
 329                 c->incw = c->inch = 0;
 330         if(c->flags & PMaxSize) {
 331                 c->maxw = size.max_width;
 332                 c->maxh = size.max_height;
 333         }
 334         else
 335                 c->maxw = c->maxh = 0;
 336         if(c->flags & PMinSize) {
 337                 c->minw = size.min_width;
 338                 c->minh = size.min_height;
 339         }
 340         else if(c->flags & PBaseSize) {
 341                 c->minw = size.base_width;
 342                 c->minh = size.base_height;
 343         }
 344         else
 345                 c->minw = c->minh = 0;
 346         if(c->flags & PAspect) {
 347                 c->minax = size.min_aspect.x;
 348                 c->maxax = size.max_aspect.x;
 349                 c->minay = size.min_aspect.y;
 350                 c->maxay = size.max_aspect.y;
 351         }
 352         else
 353                 c->minax = c->maxax = c->minay = c->maxay = 0;
 354         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 355                         && c->maxw == c->minw && c->maxh == c->minh);
 356 }
 357
 358 void
 359 updatetitle(Client *c) {
 360         char **list = NULL;
 361         int n;
 362         XTextProperty name;
 363
 364         name.nitems = 0;
 365         c->name[0] = 0;
 366         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 367         if(!name.nitems)
 368                 XGetWMName(dpy, c->win, &name);
 369         if(!name.nitems)
 370                 return;
 371         if(name.encoding == XA_STRING)
 372                 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
 373         else {
 374                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 375                 && n > 0 && *list)
 376                 {
 377                         strncpy(c->name, *list, sizeof c->name - 1);
 378                         XFreeStringList(list);
 379                 }
 380         }
 381         c->name[sizeof c->name - 1] = '\0';
 382         XFree(name.value);
 383 }
 384
 385 void
 386 unmanage(Client *c) {
 387         XWindowChanges wc;
 388
 389         wc.border_width = c->oldborder;
 390         /* The server grab construct avoids race conditions. */
 391         XGrabServer(dpy);
 392         XSetErrorHandler(xerrordummy);
 393         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 394         detach(c);
 395         detachstack(c);
 396         if(sel == c)
 397                 focus(NULL);
 398         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 399         setclientstate(c, WithdrawnState);
 400         free(c->tags);
 401         free(c);
 402         XSync(dpy, False);
 403         XSetErrorHandler(xerror);
 404         XUngrabServer(dpy);
 405         lt->arrange();
 406 }