client.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dwm.h"
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <X11/Xatom.h>
   9 #include <X11/Xutil.h>
  10
  11 /* static functions */
  12
  13 static void
  14 detachstack(Client *c)
  15 {
  16         Client **tc;
  17         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  18         *tc = c->snext;
  19 }
  20
  21 static void
  22 grabbuttons(Client *c, Bool focus)
  23 {
  24         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  25
  26         if(focus) {
  27                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  28                                 GrabModeAsync, GrabModeSync, None, None);
  29                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  30                                 GrabModeAsync, GrabModeSync, None, None);
  31                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  32                                 GrabModeAsync, GrabModeSync, None, None);
  33                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  34                                 GrabModeAsync, GrabModeSync, None, None);
  35
  36                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  37                                 GrabModeAsync, GrabModeSync, None, None);
  38                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  39                                 GrabModeAsync, GrabModeSync, None, None);
  40                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  41                                 GrabModeAsync, GrabModeSync, None, None);
  42                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  43                                 GrabModeAsync, GrabModeSync, None, None);
  44
  45                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  46                                 GrabModeAsync, GrabModeSync, None, None);
  47                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  48                                 GrabModeAsync, GrabModeSync, None, None);
  49                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  50                                 GrabModeAsync, GrabModeSync, None, None);
  51                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  52                                 GrabModeAsync, GrabModeSync, None, None);
  53         }
  54         else
  55                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  56                                 GrabModeAsync, GrabModeSync, None, None);
  57
  58 }
  59
  60 static void
  61 resizetitle(Client *c)
  62 {
  63         c->tw = textw(c->name);
  64         if(c->tw > c->w)
  65                 c->tw = c->w + 2;
  66         c->tx = c->x + c->w - c->tw + 2;
  67         c->ty = c->y;
  68         if(isvisible(c))
  69                 XMoveResizeWindow(dpy, c->twin, c->tx, c->ty, c->tw, c->th);
  70         else
  71                 XMoveResizeWindow(dpy, c->twin, c->tx + 2 * sw, c->ty, c->tw, c->th);
  72
  73 }
  74
  75 static int
  76 xerrordummy(Display *dsply, XErrorEvent *ee)
  77 {
  78         return 0;
  79 }
  80
  81 /* extern functions */
  82
  83 void
  84 ban(Client *c)
  85 {
  86         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  87         XMoveWindow(dpy, c->twin, c->tx + 2 * sw, c->ty);
  88 }
  89
  90 void
  91 focus(Client *c)
  92 {
  93         Client *old;
  94
  95         if(!issel)
  96                 return;
  97         if(!sel)
  98                 sel = c;
  99         else if(sel != c) {
 100                 if(maximized)
 101                         togglemax(NULL);
 102                 old = sel;
 103                 sel = c;
 104                 if(old) {
 105                         grabbuttons(old, False);
 106                         drawtitle(old);
 107                 }
 108         }
 109         if(c) {
 110                 detachstack(c);
 111                 c->snext = stack;
 112                 stack = c;
 113                 grabbuttons(c, True);
 114                 drawtitle(c);
 115                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 116         }
 117         else
 118                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 119 }
 120
 121 Client *
 122 getclient(Window w)
 123 {
 124         Client *c;
 125
 126         for(c = clients; c; c = c->next)
 127                 if(c->win == w)
 128                         return c;
 129         return NULL;
 130 }
 131
 132 Client *
 133 getctitle(Window w)
 134 {
 135         Client *c;
 136
 137         for(c = clients; c; c = c->next)
 138                 if(c->twin == w)
 139                         return c;
 140         return NULL;
 141 }
 142
 143 void
 144 gravitate(Client *c, Bool invert)
 145 {
 146         int dx = 0, dy = 0;
 147
 148         switch(c->grav) {
 149         default:
 150                 break;
 151         case StaticGravity:
 152         case NorthWestGravity:
 153         case NorthGravity:
 154         case NorthEastGravity:
 155                 dy = c->border;
 156                 break;
 157         case EastGravity:
 158         case CenterGravity:
 159         case WestGravity:
 160                 dy = -(c->h / 2) + c->border;
 161                 break;
 162         case SouthEastGravity:
 163         case SouthGravity:
 164         case SouthWestGravity:
 165                 dy = -(c->h);
 166                 break;
 167         }
 168
 169         switch (c->grav) {
 170         default:
 171                 break;
 172         case StaticGravity:
 173         case NorthWestGravity:
 174         case WestGravity:
 175         case SouthWestGravity:
 176                 dx = c->border;
 177                 break;
 178         case NorthGravity:
 179         case CenterGravity:
 180         case SouthGravity:
 181                 dx = -(c->w / 2) + c->border;
 182                 break;
 183         case NorthEastGravity:
 184         case EastGravity:
 185         case SouthEastGravity:
 186                 dx = -(c->w + c->border);
 187                 break;
 188         }
 189
 190         if(invert) {
 191                 dx = -dx;
 192                 dy = -dy;
 193         }
 194         c->x += dx;
 195         c->y += dy;
 196 }
 197
 198 void
 199 killclient(Arg *arg)
 200 {
 201         if(!sel)
 202                 return;
 203         if(sel->proto & PROTODELWIN)
 204                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 205         else
 206                 XKillClient(dpy, sel->win);
 207 }
 208
 209 void
 210 manage(Window w, XWindowAttributes *wa)
 211 {
 212         Client *c;
 213         Window trans;
 214         XSetWindowAttributes twa;
 215
 216         c = emallocz(sizeof(Client));
 217         c->tags = emallocz(ntags * sizeof(Bool));
 218         c->win = w;
 219         c->x = c->tx = wa->x;
 220         c->y = c->ty = wa->y;
 221         c->w = c->tw = wa->width;
 222         c->h = wa->height;
 223         c->th = bh;
 224
 225         c->border = 0;
 226         setsize(c);
 227
 228         if(c->x + c->w + 2 > sw)
 229                 c->x = sw - c->w - 2;
 230         if(c->x < 0)
 231                 c->x = 0;
 232         if(c->y + c->h + 2 > sh)
 233                 c->y = sh - c->h - 2;
 234         if(c->h != sh && c->y < bh)
 235                 c->y = bh;
 236
 237         c->proto = getproto(c->win);
 238         XSelectInput(dpy, c->win,
 239                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 240         XGetTransientForHint(dpy, c->win, &trans);
 241         twa.override_redirect = 1;
 242         twa.background_pixmap = ParentRelative;
 243         twa.event_mask = ExposureMask | EnterWindowMask;
 244
 245         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 246                         0, DefaultDepth(dpy, screen), CopyFromParent,
 247                         DefaultVisual(dpy, screen),
 248                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 249
 250         grabbuttons(c, False);
 251         settags(c, getclient(trans));
 252         if(!c->isfloat)
 253                 c->isfloat = trans
 254                         || (c->maxw && c->minw &&
 255                                 c->maxw == c->minw && c->maxh == c->minh);
 256
 257         if(clients)
 258                 clients->prev = c;
 259         c->next = clients;
 260         c->snext = stack;
 261         stack = clients = c;
 262
 263         settitle(c);
 264         ban(c);
 265         XMapWindow(dpy, c->win);
 266         XMapWindow(dpy, c->twin);
 267         if(isvisible(c))
 268                 focus(c);
 269         arrange(NULL);
 270 }
 271
 272 void
 273 resize(Client *c, Bool sizehints, Corner sticky)
 274 {
 275         int bottom = c->y + c->h;
 276         int right = c->x + c->w;
 277         XWindowChanges wc;
 278
 279         if(sizehints) {
 280                 if(c->incw)
 281                         c->w -= (c->w - c->basew) % c->incw;
 282                 if(c->inch)
 283                         c->h -= (c->h - c->baseh) % c->inch;
 284                 if(c->minw && c->w < c->minw)
 285                         c->w = c->minw;
 286                 if(c->minh && c->h < c->minh)
 287                         c->h = c->minh;
 288                 if(c->maxw && c->w > c->maxw)
 289                         c->w = c->maxw;
 290                 if(c->maxh && c->h > c->maxh)
 291                         c->h = c->maxh;
 292         }
 293         if(sticky == TopRight || sticky == BotRight)
 294                 c->x = right - c->w;
 295         if(sticky == BotLeft || sticky == BotRight)
 296                 c->y = bottom - c->h;
 297
 298         resizetitle(c);
 299         wc.x = c->x;
 300         wc.y = c->y;
 301         wc.width = c->w;
 302         wc.height = c->h;
 303         if(c->w == sw && c->h == sh)
 304                 wc.border_width = 0;
 305         else
 306                 wc.border_width = 1;
 307         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 308         XSync(dpy, False);
 309 }
 310
 311 void
 312 setsize(Client *c)
 313 {
 314         long msize;
 315         XSizeHints size;
 316
 317         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 318                 size.flags = PSize;
 319         c->flags = size.flags;
 320         if(c->flags & PBaseSize) {
 321                 c->basew = size.base_width;
 322                 c->baseh = size.base_height;
 323         }
 324         else
 325                 c->basew = c->baseh = 0;
 326         if(c->flags & PResizeInc) {
 327                 c->incw = size.width_inc;
 328                 c->inch = size.height_inc;
 329         }
 330         else
 331                 c->incw = c->inch = 0;
 332         if(c->flags & PMaxSize) {
 333                 c->maxw = size.max_width;
 334                 c->maxh = size.max_height;
 335         }
 336         else
 337                 c->maxw = c->maxh = 0;
 338         if(c->flags & PMinSize) {
 339                 c->minw = size.min_width;
 340                 c->minh = size.min_height;
 341         }
 342         else
 343                 c->minw = c->minh = 0;
 344         if(c->flags & PWinGravity)
 345                 c->grav = size.win_gravity;
 346         else
 347                 c->grav = NorthWestGravity;
 348 }
 349
 350 void
 351 settitle(Client *c)
 352 {
 353         char **list = NULL;
 354         int n;
 355         XTextProperty name;
 356
 357         name.nitems = 0;
 358         c->name[0] = 0;
 359         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 360         if(!name.nitems)
 361                 XGetWMName(dpy, c->win, &name);
 362         if(!name.nitems)
 363                 return;
 364         if(name.encoding == XA_STRING)
 365                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 366         else {
 367                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 368                                 && n > 0 && *list)
 369                 {
 370                         strncpy(c->name, *list, sizeof(c->name));
 371                         XFreeStringList(list);
 372                 }
 373         }
 374         XFree(name.value);
 375         resizetitle(c);
 376 }
 377
 378 void
 379 togglemax(Arg *arg)
 380 {
 381         int ox, oy, ow, oh;
 382         Client *c;
 383         XEvent ev;
 384
 385         if(!sel)
 386                 return;
 387
 388         if((maximized = !maximized)) {
 389                 ox = sel->x;
 390                 oy = sel->y;
 391                 ow = sel->w;
 392                 oh = sel->h;
 393                 sel->x = sx;
 394                 sel->y = sy + bh;
 395                 sel->w = sw - 2;
 396                 sel->h = sh - 2 - bh;
 397
 398                 restack();
 399                 for(c = getnext(clients); c; c = getnext(c->next))
 400                         if(c != sel)
 401                                 ban(c);
 402                 resize(sel, arrange == dofloat, TopLeft);
 403
 404                 sel->x = ox;
 405                 sel->y = oy;
 406                 sel->w = ow;
 407                 sel->h = oh;
 408         }
 409         else
 410                 arrange(NULL);
 411         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 412 }
 413
 414 void
 415 unmanage(Client *c)
 416 {
 417         Client *tc, *fc;
 418         Window trans;
 419         XGrabServer(dpy);
 420         XSetErrorHandler(xerrordummy);
 421
 422         detach(c);
 423         if(sel == c) {
 424                 XGetTransientForHint(dpy, c->win, &trans);
 425                 if(trans && (tc = getclient(trans)) && isvisible(tc))
 426                         fc = tc;
 427                 else
 428                         fc = getnext(clients);
 429                 focus(fc);
 430         }
 431
 432         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 433         XDestroyWindow(dpy, c->twin);
 434
 435         detachstack(c);
 436         free(c->tags);
 437         free(c);
 438
 439         XSync(dpy, False);
 440         XSetErrorHandler(xerror);
 441         XUngrabServer(dpy);
 442         arrange(NULL);
 443 }