client.c

   1 /*
   2  * client.c - client management
   3  *
   4  * Copyright © 2007 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <stdio.h>
  23 #include <X11/Xatom.h>
  24 #include <X11/Xutil.h>
  25 #include <X11/extensions/shape.h>
  26
  27 #include "screen.h"
  28 #include "awesome.h"
  29 #include "layout.h"
  30 #include "tag.h"
  31 #include "util.h"
  32 #include "statusbar.h"
  33
  34 #include "layouts/floating.h"
  35
  36 /* extern */
  37 extern Client *clients, *sel, *stack;   /* global client list and stack */
  38
  39 /** Attach client stack to clients stacks
  40  * \param c the client
  41  */
  42 static inline void
  43 attachstack(Client * c)
  44 {
  45     c->snext = stack;
  46     stack = c;
  47 }
  48
  49 /** Detach client from stack
  50  * \param c the client
  51  */
  52 static inline void
  53 detachstack(Client * c)
  54 {
  55     Client **tc;
  56
  57     for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
  58     *tc = c->snext;
  59 }
  60
  61 /** Grab or ungrab buttons when a client is focused
  62  * \param c client
  63  * \param focused True if client is focused
  64  * \param modkey Mod key mask
  65  * \param numlockmask Numlock mask
  66  */
  67 static void
  68 grabbuttons(Client * c, Bool focused, KeySym modkey, unsigned int numlockmask)
  69 {
  70     XUngrabButton(c->display, AnyButton, AnyModifier, c->win);
  71
  72     if(focused)
  73     {
  74         XGrabButton(c->display, Button1, modkey, c->win, False, BUTTONMASK,
  75                     GrabModeAsync, GrabModeSync, None, None);
  76         XGrabButton(c->display, Button1, modkey | LockMask, c->win, False,
  77                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  78         XGrabButton(c->display, Button1, modkey | numlockmask, c->win, False,
  79                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  80         XGrabButton(c->display, Button1, modkey | numlockmask | LockMask,
  81                     c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  82
  83         XGrabButton(c->display, Button2, modkey, c->win, False, BUTTONMASK,
  84                     GrabModeAsync, GrabModeSync, None, None);
  85         XGrabButton(c->display, Button2, modkey | LockMask, c->win, False,
  86                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  87         XGrabButton(c->display, Button2, modkey | numlockmask, c->win, False,
  88                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  89         XGrabButton(c->display, Button2, modkey | numlockmask | LockMask,
  90                     c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  91
  92         XGrabButton(c->display, Button3, modkey, c->win, False, BUTTONMASK,
  93                     GrabModeAsync, GrabModeSync, None, None);
  94         XGrabButton(c->display, Button3, modkey | LockMask, c->win, False,
  95                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  96         XGrabButton(c->display, Button3, modkey | numlockmask, c->win, False,
  97                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
  98         XGrabButton(c->display, Button3, modkey | numlockmask | LockMask,
  99                     c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 100
 101         XUngrabButton(c->display, AnyButton, AnyModifier, DefaultRootWindow(c->display));
 102     }
 103     else
 104     {
 105         XGrabButton(c->display, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
 106                     GrabModeAsync, GrabModeSync, None, None);
 107         XGrabButton(c->display, Button4, NoSymbol, DefaultRootWindow(c->display), False, BUTTONMASK,
 108                     GrabModeAsync, GrabModeSync, None, None);
 109         XGrabButton(c->display, Button4, LockMask, DefaultRootWindow(c->display), False, BUTTONMASK,
 110                     GrabModeAsync, GrabModeSync, None, None);
 111         XGrabButton(c->display, Button4, numlockmask, DefaultRootWindow(c->display), False, BUTTONMASK,
 112                     GrabModeAsync, GrabModeSync, None, None);
 113         XGrabButton(c->display, Button4, numlockmask | LockMask, DefaultRootWindow(c->display), False, BUTTONMASK,
 114                     GrabModeAsync, GrabModeSync, None, None);
 115
 116         XGrabButton(c->display, Button5, NoSymbol, DefaultRootWindow(c->display), False, BUTTONMASK,
 117                     GrabModeAsync, GrabModeSync, None, None);
 118         XGrabButton(c->display, Button5, LockMask, DefaultRootWindow(c->display), False, BUTTONMASK,
 119                     GrabModeAsync, GrabModeSync, None, None);
 120         XGrabButton(c->display, Button5, numlockmask, DefaultRootWindow(c->display), False, BUTTONMASK,
 121                     GrabModeAsync, GrabModeSync, None, None);
 122         XGrabButton(c->display, Button5, numlockmask | LockMask, DefaultRootWindow(c->display), False, BUTTONMASK,
 123                     GrabModeAsync, GrabModeSync, None, None);
 124
 125     }
 126 }
 127
 128 /** Check if client supports protocol WM_DELETE_WINDOW
 129  * \param c the client
 130  * \return True if client has WM_DELETE_WINDOW
 131  */
 132 static Bool
 133 isprotodel(Client * c)
 134 {
 135     int i, n;
 136     Atom *protocols;
 137     Bool ret = False;
 138
 139     if(XGetWMProtocols(c->display, c->win, &protocols, &n))
 140     {
 141         for(i = 0; !ret && i < n; i++)
 142             if(protocols[i] == XInternAtom(c->display, "WM_DELETE_WINDOW", False))
 143                 ret = True;
 144         XFree(protocols);
 145     }
 146     return ret;
 147 }
 148
 149 /** Set client WM_STATE property
 150  * \param c the client
 151  * \param state no idea
 152  */
 153 static void
 154 setclientstate(Client * c, long state)
 155 {
 156     long data[] = { state, None };
 157
 158     XChangeProperty(c->display, c->win, XInternAtom(c->display, "WM_STATE", False),
 159                     XInternAtom(c->display, "WM_STATE", False),  32,
 160                     PropModeReplace, (unsigned char *) data, 2);
 161 }
 162
 163 /** Set client transparency using composite
 164  * \param c client
 165  * \param opacity opacity percentage
 166  */
 167 static void
 168 setclienttrans(Client *c, double opacity)
 169 {
 170     unsigned int real_opacity = 0xffffffff;
 171
 172     if(opacity >= 0 && opacity <= 100)
 173     {
 174         real_opacity = ((opacity / 100.0) * 0xffffffff);
 175         XChangeProperty(c->display, c->win,
 176                         XInternAtom(c->display, "_NET_WM_WINDOW_OPACITY", False),
 177                         XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &real_opacity, 1L);
 178     }
 179     else
 180         XDeleteProperty(c->display, c->win, XInternAtom(c->display, "_NET_WM_WINDOW_OPACITY", False));
 181
 182     XSync(c->display, False);
 183 }
 184
 185 /** Attach client to the beginning of the clients stack
 186  * \param c the client
 187  */
 188 inline void
 189 attach(Client * c)
 190 {
 191     if(clients)
 192         clients->prev = c;
 193     c->next = clients;
 194     clients = c;
 195 }
 196
 197 inline void
 198 updatetitle(Client * c)
 199 {
 200     if(!xgettextprop(c->display, c->win, XInternAtom(c->display, "_NET_WM_NAME", False), c->name, sizeof c->name))
 201         xgettextprop(c->display, c->win, XInternAtom(c->display, "WM_NAME", False), c->name, sizeof c->name);
 202 }
 203
 204 /** Ban client
 205  * \param c the client
 206  */
 207 void
 208 ban(Client * c)
 209 {
 210     if(c->isbanned)
 211         return;
 212     XUnmapWindow(c->display, c->win);
 213     setclientstate(c, IconicState);
 214     c->isbanned = True;
 215     c->unmapped++;
 216 }
 217
 218 /** Configure client
 219  * \param c the client
 220  */
 221 void
 222 configure(Client * c)
 223 {
 224     XConfigureEvent ce;
 225
 226     ce.type = ConfigureNotify;
 227     ce.display = c->display;
 228     ce.event = c->win;
 229     ce.window = c->win;
 230     ce.x = c->x;
 231     ce.y = c->y;
 232     ce.width = c->w;
 233     ce.height = c->h;
 234     ce.border_width = c->border;
 235     ce.above = None;
 236     ce.override_redirect = False;
 237     XSendEvent(c->display, c->win, False, StructureNotifyMask, (XEvent *) & ce);
 238 }
 239
 240 void
 241 detach(Client * c)
 242 {
 243     if(c->prev)
 244         c->prev->next = c->next;
 245     if(c->next)
 246         c->next->prev = c->prev;
 247     if(c == clients)
 248         clients = c->next;
 249     c->next = c->prev = NULL;
 250 }
 251
 252 /** Give focus to client, or to first client if c is NULL
 253  * \param disp Display ref
 254  * \param drawcontext drawcontext ref
 255  * \param c client
 256  * \param selscreen True if current screen is selected
 257  * \param awesomeconf awesome config
 258  */
 259 void
 260 focus(Display *disp, DC *drawcontext, Client * c, Bool selscreen, awesome_config *awesomeconf)
 261 {
 262     /* if c is NULL or invisible, take next client in the stack */
 263     if((!c && selscreen) || (c && !isvisible(c, awesomeconf->selected_tags, awesomeconf->ntags)))
 264         for(c = stack; c && !isvisible(c, awesomeconf->selected_tags, awesomeconf->ntags); c = c->snext);
 265
 266     /* if a client was selected but it's not the current client, unfocus it */
 267     if(sel && sel != c)
 268     {
 269         grabbuttons(sel, False, awesomeconf->modkey, awesomeconf->numlockmask);
 270         XSetWindowBorder(sel->display, sel->win, drawcontext->norm[ColBorder]);
 271         setclienttrans(sel, awesomeconf->opacity_unfocused);
 272     }
 273     if(c)
 274     {
 275         detachstack(c);
 276         attachstack(c);
 277         grabbuttons(c, True, awesomeconf->modkey, awesomeconf->numlockmask);
 278     }
 279     if(!selscreen)
 280         return;
 281     sel = c;
 282     drawstatusbar(disp, drawcontext, awesomeconf);
 283     if(sel)
 284     {
 285         XSetWindowBorder(sel->display, sel->win, drawcontext->sel[ColBorder]);
 286         XSetInputFocus(sel->display, sel->win, RevertToPointerRoot, CurrentTime);
 287         for(c = stack; c; c = c->snext)
 288             if(c != sel)
 289                 setclienttrans(c, awesomeconf->opacity_unfocused);
 290         setclienttrans(sel, -1);
 291     }
 292     else
 293         XSetInputFocus(disp, DefaultRootWindow(disp), RevertToPointerRoot, CurrentTime);
 294 }
 295
 296 /** Kill selected client
 297  * \param disp Display ref
 298  * \param awesomeconf awesome config
 299  * \param arg unused
 300  * \ingroup ui_callback
 301  */
 302 void
 303 uicb_killclient(Display *disp __attribute__ ((unused)),
 304                 DC *drawcontext __attribute__ ((unused)),
 305                 awesome_config *awesomeconf __attribute__ ((unused)),
 306                 const char *arg __attribute__ ((unused)))
 307 {
 308     XEvent ev;
 309
 310     if(!sel)
 311         return;
 312     if(isprotodel(sel))
 313     {
 314         ev.type = ClientMessage;
 315         ev.xclient.window = sel->win;
 316         ev.xclient.message_type = XInternAtom(disp, "WM_PROTOCOLS", False);
 317         ev.xclient.format = 32;
 318         ev.xclient.data.l[0] = XInternAtom(disp, "WM_DELETE_WINDOW", False);
 319         ev.xclient.data.l[1] = CurrentTime;
 320         XSendEvent(sel->display, sel->win, False, NoEventMask, &ev);
 321     }
 322     else
 323         XKillClient(sel->display, sel->win);
 324 }
 325
 326 static Bool
 327 loadprops(Client * c, int ntags)
 328 {
 329     int i;
 330     char *prop;
 331     Bool result = False;
 332
 333     prop = p_new(char, ntags + 2);
 334
 335     if(xgettextprop(c->display, c->win, AWESOMEPROPS_ATOM(c->display), prop, ntags + 2))
 336     {
 337         for(i = 0; i < ntags && prop[i]; i++)
 338             if((c->tags[i] = prop[i] == '1'))
 339                 result = True;
 340         if(i <= ntags && prop[i])
 341             c->isfloating = prop[i] == '1';
 342     }
 343
 344     p_delete(&prop);
 345
 346     return result;
 347 }
 348
 349 void
 350 manage(Display * disp, DC *drawcontext, Window w, XWindowAttributes * wa, awesome_config *awesomeconf)
 351 {
 352     int i;
 353     Client *c, *t = NULL;
 354     Window trans;
 355     Status rettrans;
 356     XWindowChanges wc;
 357
 358     c = p_new(Client, 1);
 359     c->tags = p_new(Bool, awesomeconf->ntags);
 360     c->win = w;
 361     c->ftview = True;
 362     c->x = c->rw = wa->x;
 363     c->y = c->ry = wa->y;
 364     c->w = c->rw = wa->width;
 365     c->h = c->rh = wa->height;
 366     c->oldborder = wa->border_width;
 367     c->display = disp;
 368     if(c->w == DisplayWidth(disp, DefaultScreen(disp))
 369        && c->h == DisplayHeight(disp, DefaultScreen(disp)))
 370     {
 371         c->x = 0;
 372         c->y = 0;
 373         c->border = wa->border_width;
 374     }
 375     else
 376     {
 377         ScreenInfo *si = get_display_info(disp, awesomeconf->statusbar);
 378
 379         if(c->x + c->w + 2 * c->border > si->x_org + si->width)
 380             c->x = c->rx = si->x_org + si->width - c->w - 2 * c->border;
 381         if(c->y + c->h + 2 * c->border > si->y_org + si->height)
 382             c->y = c->ry = si->y_org + si->height - c->h - 2 * c->border;
 383         if(c->x < si->x_org)
 384             c->x = c->rx = si->x_org;
 385         if(c->y < si->y_org)
 386             c->y = c->ry = si->y_org;
 387         c->border = awesomeconf->borderpx;
 388         XFree(si);
 389     }
 390     wc.border_width = c->border;
 391     XConfigureWindow(disp, w, CWBorderWidth, &wc);
 392     XSetWindowBorder(disp, w, drawcontext->norm[ColBorder]);
 393     configure(c);               /* propagates border_width, if size doesn't change */
 394     updatesizehints(c);
 395     XSelectInput(disp, w, StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 396     if(awesomeconf->have_shape)
 397     {
 398         XShapeSelectInput(disp, w, ShapeNotifyMask);
 399         set_shape(c);
 400     }
 401     grabbuttons(c, False, awesomeconf->modkey, awesomeconf->numlockmask);
 402     updatetitle(c);
 403     if((rettrans = XGetTransientForHint(disp, w, &trans) == Success))
 404         for(t = clients; t && t->win != trans; t = t->next);
 405     if(t)
 406         for(i = 0; i < awesomeconf->ntags; i++)
 407             c->tags[i] = t->tags[i];
 408     if(!loadprops(c, awesomeconf->ntags))
 409         applyrules(c, awesomeconf);
 410     if(!c->isfloating)
 411         c->isfloating = (rettrans == Success) || c->isfixed;
 412     saveprops(c, awesomeconf->ntags);
 413     attach(c);
 414     attachstack(c);
 415     XMoveResizeWindow(disp, c->win, c->x, c->y, c->w, c->h);     /* some windows require this */
 416     ban(c);
 417     arrange(disp, drawcontext, awesomeconf);
 418 }
 419
 420 void
 421 resize(Client * c, int x, int y, int w, int h, Bool sizehints)
 422 {
 423     double dx, dy, max, min, ratio;
 424     XWindowChanges wc;
 425
 426     if(sizehints)
 427     {
 428         if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0)
 429         {
 430             dx = (double) (w - c->basew);
 431             dy = (double) (h - c->baseh);
 432             min = (double) (c->minax) / (double) (c->minay);
 433             max = (double) (c->maxax) / (double) (c->maxay);
 434             ratio = dx / dy;
 435             if(max > 0 && min > 0 && ratio > 0)
 436             {
 437                 if(ratio < min)
 438                 {
 439                     dy = (dx * min + dy) / (min * min + 1);
 440                     dx = dy * min;
 441                     w = (int) dx + c->basew;
 442                     h = (int) dy + c->baseh;
 443                 }
 444                 else if(ratio > max)
 445                 {
 446                     dy = (dx * min + dy) / (max * max + 1);
 447                     dx = dy * min;
 448                     w = (int) dx + c->basew;
 449                     h = (int) dy + c->baseh;
 450                 }
 451             }
 452         }
 453         if(c->minw && w < c->minw)
 454             w = c->minw;
 455         if(c->minh && h < c->minh)
 456             h = c->minh;
 457         if(c->maxw && w > c->maxw)
 458             w = c->maxw;
 459         if(c->maxh && h > c->maxh)
 460             h = c->maxh;
 461         if(c->incw)
 462             w -= (w - c->basew) % c->incw;
 463         if(c->inch)
 464             h -= (h - c->baseh) % c->inch;
 465     }
 466     if(w <= 0 || h <= 0)
 467         return;
 468     /* offscreen appearance fixes */
 469     if(x > DisplayWidth(c->display, DefaultScreen(c->display)))
 470         x = DisplayWidth(c->display, DefaultScreen(c->display)) - w - 2 * c->border;
 471     if(y > DisplayHeight(c->display, DefaultScreen(c->display)))
 472         y = DisplayHeight(c->display, DefaultScreen(c->display)) - h - 2 * c->border;
 473     if(x + w + 2 * c->border < 0)
 474         x = 0;
 475     if(y + h + 2 * c->border < 0)
 476         y = 0;
 477     if(c->x != x || c->y != y || c->w != w || c->h != h)
 478     {
 479         c->x = wc.x = x;
 480         c->y = wc.y = y;
 481         c->w = wc.width = w;
 482         c->h = wc.height = h;
 483         wc.border_width = c->border;
 484         XConfigureWindow(c->display, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 485         configure(c);
 486         XSync(c->display, False);
 487     }
 488 }
 489
 490 void
 491 uicb_moveresize(Display *disp __attribute__ ((unused)),
 492                 DC *drawcontext __attribute__ ((unused)),
 493                 awesome_config *awesomeconf,
 494                 const char *arg)
 495 {
 496     int x, y, w, h, nx, ny, nw, nh, ox, oy, ow, oh;
 497     char xabs, yabs, wabs, habs;
 498     int mx, my, dx, dy, nmx, nmy;
 499     unsigned int dui;
 500     Window dummy;
 501
 502     if(!IS_ARRANGE(floating))
 503         if(!sel || !sel->isfloating || sel->isfixed || !arg)
 504             return;
 505     if(sscanf(arg, "%d%c %d%c %d%c %d%c", &x, &xabs, &y, &yabs, &w, &wabs, &h, &habs) != 8)
 506         return;
 507     nx = xabs == 'x' ? sel->x + x : x;
 508     ny = yabs == 'y' ? sel->y + y : y;
 509     nw = wabs == 'w' ? sel->w + w : w;
 510     nh = habs == 'h' ? sel->h + h : h;
 511
 512     ox = sel->x;
 513     oy = sel->y;
 514     ow = sel->w;
 515     oh = sel->h;
 516
 517     Bool xqp = XQueryPointer(sel->display, DefaultRootWindow(sel->display), &dummy, &dummy, &mx, &my, &dx, &dy, &dui);
 518     resize(sel, nx, ny, nw, nh, True);
 519     if (xqp && ox <= mx && (ox + ow) >= mx && oy <= my && (oy + oh) >= my)
 520     {
 521         nmx = mx-ox+sel->w-ow-1 < 0 ? 0 : mx-ox+sel->w-ow-1;
 522         nmy = my-oy+sel->h-oh-1 < 0 ? 0 : my-oy+sel->h-oh-1;
 523         XWarpPointer(sel->display, None, sel->win, 0, 0, 0, 0, nmx, nmy);
 524     }
 525 }
 526
 527 void
 528 saveprops(Client * c, int ntags)
 529 {
 530     int i;
 531     char *prop;
 532
 533     prop = p_new(char, ntags + 2);
 534
 535     for(i = 0; i < ntags; i++)
 536         prop[i] = c->tags[i] ? '1' : '0';
 537
 538     if(i <= ntags)
 539         prop[i] = c->isfloating ? '1' : '0';
 540
 541     prop[++i] = '\0';
 542
 543     XChangeProperty(c->display, c->win, AWESOMEPROPS_ATOM(c->display), XA_STRING, 8,
 544                     PropModeReplace, (unsigned char *) prop, i);
 545
 546     p_delete(&prop);
 547 }
 548
 549 void
 550 unban(Client * c)
 551 {
 552     if(!c->isbanned)
 553         return;
 554     XMapWindow(c->display, c->win);
 555     setclientstate(c, NormalState);
 556     c->isbanned = False;
 557 }
 558
 559 void
 560 unmanage(Client * c, DC *drawcontext, long state, awesome_config *awesomeconf)
 561 {
 562     XWindowChanges wc;
 563
 564     wc.border_width = c->oldborder;
 565     /* The server grab construct avoids race conditions. */
 566     XGrabServer(c->display);
 567     XConfigureWindow(c->display, c->win, CWBorderWidth, &wc);  /* restore border */
 568     detach(c);
 569     detachstack(c);
 570     if(sel == c)
 571         focus(c->display, drawcontext, NULL, True, awesomeconf);
 572     XUngrabButton(c->display, AnyButton, AnyModifier, c->win);
 573     setclientstate(c, state);
 574     XSync(c->display, False);
 575     XSetErrorHandler(xerror);
 576     XUngrabServer(c->display);
 577     if(state != NormalState)
 578         arrange(c->display, drawcontext, awesomeconf);
 579     p_delete(&c->tags);
 580     p_delete(&c);
 581 }
 582
 583 void
 584 updatesizehints(Client * c)
 585 {
 586     long msize;
 587     XSizeHints size;
 588
 589     if(!XGetWMNormalHints(c->display, c->win, &size, &msize) || !size.flags)
 590         size.flags = PSize;
 591     c->flags = size.flags;
 592     if(c->flags & PBaseSize)
 593     {
 594         c->basew = size.base_width;
 595         c->baseh = size.base_height;
 596     }
 597     else if(c->flags & PMinSize)
 598     {
 599         c->basew = size.min_width;
 600         c->baseh = size.min_height;
 601     }
 602     else
 603         c->basew = c->baseh = 0;
 604     if(c->flags & PResizeInc)
 605     {
 606         c->incw = size.width_inc;
 607         c->inch = size.height_inc;
 608     }
 609     else
 610         c->incw = c->inch = 0;
 611
 612     if(c->flags & PMaxSize)
 613     {
 614         c->maxw = size.max_width;
 615         c->maxh = size.max_height;
 616     }
 617     else
 618         c->maxw = c->maxh = 0;
 619
 620     if(c->flags & PMinSize)
 621     {
 622         c->minw = size.min_width;
 623         c->minh = size.min_height;
 624     }
 625     else if(c->flags & PBaseSize)
 626     {
 627         c->minw = size.base_width;
 628         c->minh = size.base_height;
 629     }
 630     else
 631         c->minw = c->minh = 0;
 632
 633     if(c->flags & PAspect)
 634     {
 635         c->minax = size.min_aspect.x;
 636         c->maxax = size.max_aspect.x;
 637         c->minay = size.min_aspect.y;
 638         c->maxay = size.max_aspect.y;
 639     }
 640     else
 641         c->minax = c->maxax = c->minay = c->maxay = 0;
 642
 643     c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 644                   && c->maxw == c->minw && c->maxh == c->minh);
 645 }
 646
 647 void
 648 set_shape(Client *c)
 649 {
 650     int bounding_shaped;
 651     int i, b;  unsigned int u;  /* dummies */
 652     /* Logic to decide if we have a shaped window cribbed from fvwm-2.5.10. */
 653     if (XShapeQueryExtents(c->display, c->win, &bounding_shaped, &i, &i,
 654                            &u, &u, &b, &i, &i, &u, &u) && bounding_shaped)
 655         XShapeCombineShape(c->display, DefaultRootWindow(c->display), ShapeBounding, 0, 0, c->win, ShapeBounding, ShapeSet);
 656 }
 657
 658 void
 659 uicb_settrans(Display *disp __attribute__ ((unused)),
 660               DC *drawcontext __attribute__ ((unused)),
 661               awesome_config *awesomeconf __attribute__ ((unused)),
 662               const char *arg)
 663 {
 664     double delta = 100.0, current_opacity = 0.0;
 665     unsigned char *data;
 666     Atom actual;
 667     int format;
 668     unsigned long n, left;
 669     unsigned int current_opacity_raw = 0;
 670     int set_prop = 0;
 671
 672     if(!sel)
 673         return;
 674
 675     XGetWindowProperty(sel->display, sel->win, XInternAtom(sel->display, "_NET_WM_WINDOW_OPACITY", False),
 676                        0L, 1L, False, XA_CARDINAL, &actual, &format, &n, &left,
 677                        (unsigned char **) &data);
 678     if(data)
 679     {
 680         memcpy(&current_opacity_raw, data, sizeof(unsigned int));
 681         XFree(data);
 682         current_opacity = (current_opacity_raw * 100.0) / 0xffffffff;
 683     }
 684     else
 685         set_prop = 1;
 686
 687     delta = compute_new_value_from_arg(arg, current_opacity);
 688
 689     if(delta <= 0.0)
 690         delta = 0.0;
 691     else if(delta > 100.0)
 692     {
 693         delta = 100.0;
 694         set_prop = 1;
 695     }
 696
 697     if(delta == 100.0 && !set_prop)
 698         setclienttrans(sel, -1);
 699     else
 700         setclienttrans(sel, delta);
 701 }