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