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  * © 2006-2007 Jukka Salmi <jukka at salmi dot ch>
   4  * © 2007 Premysl Hruby <dfenze at gmail dot com>
   5  * © 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
   6  * See LICENSE file for license details. */
   7 #include "dwm.h"
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <X11/Xatom.h>
  11 #include <X11/Xutil.h>
  12
  13 /* static */
  14
  15 static void
  16 attachstack(Client *c) {
  17         c->snext = stack;
  18         stack = c;
  19 }
  20
  21 static void
  22 detachstack(Client *c) {
  23         Client **tc;
  24
  25         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  26         *tc = c->snext;
  27 }
  28
  29 static void
  30 grabbuttons(Client *c, Bool focused) {
  31         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  32
  33         if(focused) {
  34                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  35                                 GrabModeAsync, GrabModeSync, None, None);
  36                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  37                                 GrabModeAsync, GrabModeSync, None, None);
  38                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  39                                 GrabModeAsync, GrabModeSync, None, None);
  40                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  41                                 GrabModeAsync, GrabModeSync, None, None);
  42
  43                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  44                                 GrabModeAsync, GrabModeSync, None, None);
  45                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  48                                 GrabModeAsync, GrabModeSync, None, None);
  49                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  50                                 GrabModeAsync, GrabModeSync, None, None);
  51
  52                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  53                                 GrabModeAsync, GrabModeSync, None, None);
  54                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  55                                 GrabModeAsync, GrabModeSync, None, None);
  56                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  57                                 GrabModeAsync, GrabModeSync, None, None);
  58                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  59                                 GrabModeAsync, GrabModeSync, None, None);
  60         }
  61         else
  62                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  63                                 GrabModeAsync, GrabModeSync, None, None);
  64 }
  65
  66 static Bool
  67 isprotodel(Client *c) {
  68         int i, n;
  69         Atom *protocols;
  70         Bool ret = False;
  71
  72         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
  73                 for(i = 0; !ret && i < n; i++)
  74                         if(protocols[i] == wmatom[WMDelete])
  75                                 ret = True;
  76                 XFree(protocols);
  77         }
  78         return ret;
  79 }
  80
  81 static void
  82 setclientstate(Client *c, long state) {
  83         long data[] = {state, None};
  84
  85         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
  86                         PropModeReplace, (unsigned char *)data, 2);
  87 }
  88
  89 static int
  90 xerrordummy(Display *dsply, XErrorEvent *ee) {
  91         return 0;
  92 }
  93
  94 /* extern */
  95
  96 void
  97 attach(Client *c) {
  98         if(clients)
  99                 clients->prev = c;
 100         c->next = clients;
 101         clients = c;
 102 }
 103
 104 void
 105 configure(Client *c) {
 106         XConfigureEvent ce;
 107
 108         ce.type = ConfigureNotify;
 109         ce.display = dpy;
 110         ce.event = c->win;
 111         ce.window = c->win;
 112         ce.x = c->x;
 113         ce.y = c->y;
 114         ce.width = c->w;
 115         ce.height = c->h;
 116         ce.border_width = c->border;
 117         ce.above = None;
 118         ce.override_redirect = False;
 119         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 120 }
 121
 122 void
 123 detach(Client *c) {
 124         if(c->prev)
 125                 c->prev->next = c->next;
 126         if(c->next)
 127                 c->next->prev = c->prev;
 128         if(c == clients)
 129                 clients = c->next;
 130         c->next = c->prev = NULL;
 131 }
 132
 133 void
 134 focus(Client *c) {
 135         if((!c && selscreen)|| (c && !isvisible(c)))
 136                 for(c = stack; c && !isvisible(c); c = c->snext);
 137         if(sel && sel != c) {
 138                 grabbuttons(sel, False);
 139                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 140         }
 141         if(c) {
 142                 detachstack(c);
 143                 attachstack(c);
 144                 grabbuttons(c, True);
 145         }
 146         sel = c;
 147         drawstatus();
 148         if(!selscreen)
 149                 return;
 150         if(c) {
 151                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 152                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 153         }
 154         else
 155                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 156 }
 157
 158 void
 159 killclient(const char *arg) {
 160         XEvent ev;
 161
 162         if(!sel)
 163                 return;
 164         if(isprotodel(sel)) {
 165                 ev.type = ClientMessage;
 166                 ev.xclient.window = sel->win;
 167                 ev.xclient.message_type = wmatom[WMProtocols];
 168                 ev.xclient.format = 32;
 169                 ev.xclient.data.l[0] = wmatom[WMDelete];
 170                 ev.xclient.data.l[1] = CurrentTime;
 171                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
 172         }
 173         else
 174                 XKillClient(dpy, sel->win);
 175 }
 176
 177 void
 178 manage(Window w, XWindowAttributes *wa) {
 179         Client *c, *t = NULL;
 180         Window trans;
 181         Status rettrans;
 182         XWindowChanges wc;
 183
 184         c = emallocz(sizeof(Client));
 185         c->tags = emallocz(ntags * sizeof(Bool));
 186         c->win = w;
 187         c->x = wa->x;
 188         c->y = wa->y;
 189         c->w = wa->width;
 190         c->h = wa->height;
 191         c->oldborder = wa->border_width;
 192         if(c->w == sw && c->h == sh) {
 193                 c->x = sx;
 194                 c->y = sy;
 195                 c->border = wa->border_width;
 196         }
 197         else {
 198                 if(c->x + c->w + 2 * c->border > wax + waw)
 199                         c->x = wax + waw - c->w - 2 * c->border;
 200                 if(c->y + c->h + 2 * c->border > way + wah)
 201                         c->y = way + wah - c->h - 2 * c->border;
 202                 if(c->x < wax)
 203                         c->x = wax;
 204                 if(c->y < way)
 205                         c->y = way;
 206                 c->border = BORDERPX;
 207         }
 208         wc.border_width = c->border;
 209         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 210         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
 211         configure(c); /* propagates border_width, if size doesn't change */
 212         updatesizehints(c);
 213         XSelectInput(dpy, w,
 214                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 215         grabbuttons(c, False);
 216         updatetitle(c);
 217         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
 218                 for(t = clients; t && t->win != trans; t = t->next);
 219         settags(c, t);
 220         if(!c->isfloating)
 221                 c->isfloating = (rettrans == Success) || c->isfixed;
 222         attach(c);
 223         attachstack(c);
 224         c->isbanned = True;
 225         XMoveWindow(dpy, w, c->x + 2 * sw, c->y);
 226         XMapWindow(dpy, w);
 227         setclientstate(c, NormalState);
 228         focus(c);
 229         lt->arrange();
 230 }
 231
 232 void
 233 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
 234         float dx, dy, max, min, ratio;
 235         XWindowChanges wc;
 236
 237         if(w <= 0 || h <= 0)
 238                 return;
 239         if(sizehints) {
 240                 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0) {
 241                         dx = (float)(w - c->basew);
 242                         dy = (float)(h - c->baseh);
 243                         min = (float)(c->minax) / (float)(c->minay);
 244                         max = (float)(c->maxax) / (float)(c->maxay);
 245                         ratio = dx / dy;
 246                         if(max > 0 && min > 0 && ratio > 0) {
 247                                 if(ratio < min) {
 248                                         dy = (dx * min + dy) / (min * min + 1);
 249                                         dx = dy * min;
 250                                         w = (int)dx + c->basew;
 251                                         h = (int)dy + c->baseh;
 252                                 }
 253                                 else if(ratio > max) {
 254                                         dy = (dx * min + dy) / (max * max + 1);
 255                                         dx = dy * min;
 256                                         w = (int)dx + c->basew;
 257                                         h = (int)dy + c->baseh;
 258                                 }
 259                         }
 260                 }
 261                 if(c->minw && w < c->minw)
 262                         w = c->minw;
 263                 if(c->minh && h < c->minh)
 264                         h = c->minh;
 265                 if(c->maxw && w > c->maxw)
 266                         w = c->maxw;
 267                 if(c->maxh && h > c->maxh)
 268                         h = c->maxh;
 269                 if(c->incw)
 270                         w -= (w - c->basew) % c->incw;
 271                 if(c->inch)
 272                         h -= (h - c->baseh) % c->inch;
 273         }
 274         if(w <= 0 || h <= 0)
 275                 return;
 276         /* offscreen appearance fixes */
 277         if(x > sw)
 278                 x = sw - w - 2 * c->border;
 279         if(y > sh)
 280                 y = sh - h - 2 * c->border;
 281         if(x + w + 2 * c->border < sx)
 282                 x = sx;
 283         if(y + h + 2 * c->border < sy)
 284                 y = sy;
 285         if(c->x != x || c->y != y || c->w != w || c->h != h) {
 286                 c->x = wc.x = x;
 287                 c->y = wc.y = y;
 288                 c->w = wc.width = w;
 289                 c->h = wc.height = h;
 290                 wc.border_width = c->border;
 291                 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 292                 configure(c);
 293                 XSync(dpy, False);
 294         }
 295 }
 296
 297 void
 298 togglefloating(const char *arg) {
 299         if(!sel || lt->arrange == floating)
 300                 return;
 301         sel->isfloating = !sel->isfloating;
 302         if(sel->isfloating)
 303                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
 304         lt->arrange();
 305 }
 306
 307 void
 308 updatesizehints(Client *c) {
 309         long msize;
 310         XSizeHints size;
 311
 312         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 313                 size.flags = PSize;
 314         c->flags = size.flags;
 315         if(c->flags & PBaseSize) {
 316                 c->basew = size.base_width;
 317                 c->baseh = size.base_height;
 318         }
 319         else if(c->flags & PMinSize) {
 320                 c->basew = size.min_width;
 321                 c->baseh = size.min_height;
 322         }
 323         else
 324                 c->basew = c->baseh = 0;
 325         if(c->flags & PResizeInc) {
 326                 c->incw = size.width_inc;
 327                 c->inch = size.height_inc;
 328         }
 329         else
 330                 c->incw = c->inch = 0;
 331         if(c->flags & PMaxSize) {
 332                 c->maxw = size.max_width;
 333                 c->maxh = size.max_height;
 334         }
 335         else
 336                 c->maxw = c->maxh = 0;
 337         if(c->flags & PMinSize) {
 338                 c->minw = size.min_width;
 339                 c->minh = size.min_height;
 340         }
 341         else if(c->flags & PBaseSize) {
 342                 c->minw = size.base_width;
 343                 c->minh = size.base_height;
 344         }
 345         else
 346                 c->minw = c->minh = 0;
 347         if(c->flags & PAspect) {
 348                 c->minax = size.min_aspect.x;
 349                 c->maxax = size.max_aspect.x;
 350                 c->minay = size.min_aspect.y;
 351                 c->maxay = size.max_aspect.y;
 352         }
 353         else
 354                 c->minax = c->maxax = c->minay = c->maxay = 0;
 355         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
 356                         && c->maxw == c->minw && c->maxh == c->minh);
 357 }
 358
 359 void
 360 updatetitle(Client *c) {
 361         char **list = NULL;
 362         int n;
 363         XTextProperty name;
 364
 365         name.nitems = 0;
 366         c->name[0] = 0;
 367         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 368         if(!name.nitems)
 369                 XGetWMName(dpy, c->win, &name);
 370         if(!name.nitems)
 371                 return;
 372         if(name.encoding == XA_STRING)
 373                 strncpy(c->name, (char *)name.value, sizeof c->name - 1);
 374         else {
 375                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 376                 && n > 0 && *list)
 377                 {
 378                         strncpy(c->name, *list, sizeof c->name - 1);
 379                         XFreeStringList(list);
 380                 }
 381         }
 382         c->name[sizeof c->name - 1] = '\0';
 383         XFree(name.value);
 384 }
 385
 386 void
 387 unmanage(Client *c) {
 388         XWindowChanges wc;
 389
 390         wc.border_width = c->oldborder;
 391         /* The server grab construct avoids race conditions. */
 392         XGrabServer(dpy);
 393         XSetErrorHandler(xerrordummy);
 394         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
 395         detach(c);
 396         detachstack(c);
 397         if(sel == c)
 398                 focus(NULL);
 399         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 400         setclientstate(c, WithdrawnState);
 401         free(c->tags);
 402         free(c);
 403         XSync(dpy, False);
 404         XSetErrorHandler(xerror);
 405         XUngrabServer(dpy);
 406         lt->arrange();
 407 }