client.c

   1 /* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.h"
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <X11/Xatom.h>
   8 #include <X11/Xutil.h>
   9
  10 /* static functions */
  11
  12 static void
  13 detachstack(Client *c) {
  14         Client **tc;
  15         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
  16         *tc = c->snext;
  17 }
  18
  19 static void
  20 grabbuttons(Client *c, Bool focused) {
  21         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
  22
  23         if(focused) {
  24                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
  25                                 GrabModeAsync, GrabModeSync, None, None);
  26                 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
  27                                 GrabModeAsync, GrabModeSync, None, None);
  28                 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  29                                 GrabModeAsync, GrabModeSync, None, None);
  30                 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  31                                 GrabModeAsync, GrabModeSync, None, None);
  32
  33                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
  34                                 GrabModeAsync, GrabModeSync, None, None);
  35                 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
  36                                 GrabModeAsync, GrabModeSync, None, None);
  37                 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  38                                 GrabModeAsync, GrabModeSync, None, None);
  39                 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  40                                 GrabModeAsync, GrabModeSync, None, None);
  41
  42                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
  43                                 GrabModeAsync, GrabModeSync, None, None);
  44                 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
  45                                 GrabModeAsync, GrabModeSync, None, None);
  46                 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
  47                                 GrabModeAsync, GrabModeSync, None, None);
  48                 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
  49                                 GrabModeAsync, GrabModeSync, None, None);
  50         }
  51         else
  52                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
  53                                 GrabModeAsync, GrabModeSync, None, None);
  54 }
  55
  56 static int
  57 xerrordummy(Display *dsply, XErrorEvent *ee) {
  58         return 0;
  59 }
  60
  61 /* extern functions */
  62
  63 void
  64 ban(Client *c) {
  65         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  66         XMoveWindow(dpy, c->twin, c->tx + 2 * sw, c->ty);
  67 }
  68
  69 void
  70 configure(Client *c) {
  71         XEvent synev;
  72
  73         synev.type = ConfigureNotify;
  74         synev.xconfigure.display = dpy;
  75         synev.xconfigure.event = c->win;
  76         synev.xconfigure.window = c->win;
  77         synev.xconfigure.x = c->x;
  78         synev.xconfigure.y = c->y;
  79         synev.xconfigure.width = c->w;
  80         synev.xconfigure.height = c->h;
  81         synev.xconfigure.border_width = c->border;
  82         synev.xconfigure.above = None;
  83         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  84 }
  85
  86 void
  87 focus(Client *c) {
  88         Client *old;
  89
  90         if(!issel || (c && !isvisible(c)))
  91                 return;
  92         if(!sel)
  93                 sel = c;
  94         else if(sel != c) {
  95                 old = sel;
  96                 sel = c;
  97                 if(old) {
  98                         grabbuttons(old, False);
  99                         drawtitle(old);
 100                 }
 101         }
 102         if(c) {
 103                 detachstack(c);
 104                 c->snext = stack;
 105                 stack = c;
 106                 grabbuttons(c, True);
 107                 drawtitle(c);
 108                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 109         }
 110         else
 111                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 112 }
 113
 114 Client *
 115 getclient(Window w) {
 116         Client *c;
 117
 118         for(c = clients; c; c = c->next)
 119                 if(c->win == w)
 120                         return c;
 121         return NULL;
 122 }
 123
 124 Client *
 125 getctitle(Window w) {
 126         Client *c;
 127
 128         for(c = clients; c; c = c->next)
 129                 if(c->twin == w)
 130                         return c;
 131         return NULL;
 132 }
 133
 134 void
 135 gravitate(Client *c, Bool invert) {
 136         int dx = 0, dy = 0;
 137
 138         switch(c->grav) {
 139         default:
 140                 break;
 141         case StaticGravity:
 142         case NorthWestGravity:
 143         case NorthGravity:
 144         case NorthEastGravity:
 145                 dy = c->border;
 146                 break;
 147         case EastGravity:
 148         case CenterGravity:
 149         case WestGravity:
 150                 dy = -(c->h / 2) + c->border;
 151                 break;
 152         case SouthEastGravity:
 153         case SouthGravity:
 154         case SouthWestGravity:
 155                 dy = -(c->h);
 156                 break;
 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         if(invert) {
 179                 dx = -dx;
 180                 dy = -dy;
 181         }
 182         c->x += dx;
 183         c->y += dy;
 184 }
 185
 186 void
 187 killclient(Arg *arg) {
 188         if(!sel)
 189                 return;
 190         if(sel->proto & PROTODELWIN)
 191                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 192         else
 193                 XKillClient(dpy, sel->win);
 194 }
 195
 196 void
 197 manage(Window w, XWindowAttributes *wa) {
 198         Client *c;
 199         Window trans;
 200         XSetWindowAttributes twa;
 201
 202         c = emallocz(sizeof(Client));
 203         c->tags = emallocz(ntags * sizeof(Bool));
 204         c->win = w;
 205         c->x = c->tx = wa->x;
 206         c->y = c->ty = wa->y;
 207         c->w = c->tw = wa->width;
 208         c->h = wa->height;
 209         c->th = bh;
 210         c->border = 0;
 211         updatesize(c);
 212         if(c->x + c->w + 2 * BORDERPX > sw)
 213                 c->x = sw - c->w - 2 * BORDERPX;
 214         if(c->x < sx)
 215                 c->x = sx;
 216         if(c->y + c->h + 2 * BORDERPX > sh)
 217                 c->y = sh - c->h - 2 * BORDERPX;
 218         if(c->h != sh && c->y < bh)
 219                 c->y = bh;
 220         c->proto = getproto(c->win);
 221         XSelectInput(dpy, c->win,
 222                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 223         XGetTransientForHint(dpy, c->win, &trans);
 224         twa.override_redirect = 1;
 225         twa.background_pixmap = ParentRelative;
 226         twa.event_mask = ExposureMask | EnterWindowMask;
 227         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 228                         0, DefaultDepth(dpy, screen), CopyFromParent,
 229                         DefaultVisual(dpy, screen),
 230                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 231         grabbuttons(c, False);
 232         updatetitle(c);
 233         settags(c, getclient(trans));
 234         if(!c->isfloat)
 235                 c->isfloat = trans
 236                         || (c->maxw && c->minw &&
 237                                 c->maxw == c->minw && c->maxh == c->minh);
 238         resizetitle(c);
 239         if(clients)
 240                 clients->prev = c;
 241         c->next = clients;
 242         c->snext = stack;
 243         stack = clients = c;
 244         ban(c);
 245         XMapWindow(dpy, c->win);
 246         XMapWindow(dpy, c->twin);
 247         if(isvisible(c))
 248                 focus(c);
 249         arrange(NULL);
 250 }
 251
 252 void
 253 resize(Client *c, Bool sizehints, Corner sticky) {
 254         int bottom = c->y + c->h;
 255         int right = c->x + c->w;
 256         XWindowChanges wc;
 257
 258         if(sizehints) {
 259                 if(c->incw)
 260                         c->w -= (c->w - c->basew) % c->incw;
 261                 if(c->inch)
 262                         c->h -= (c->h - c->baseh) % c->inch;
 263                 if(c->minw && c->w < c->minw)
 264                         c->w = c->minw;
 265                 if(c->minh && c->h < c->minh)
 266                         c->h = c->minh;
 267                 if(c->maxw && c->w > c->maxw)
 268                         c->w = c->maxw;
 269                 if(c->maxh && c->h > c->maxh)
 270                         c->h = c->maxh;
 271         }
 272         if(sticky == TopRight || sticky == BotRight)
 273                 c->x = right - c->w;
 274         if(sticky == BotLeft || sticky == BotRight)
 275                 c->y = bottom - c->h;
 276         /* offscreen appearance fixes */
 277         if(c->x + c->w < sx)
 278                 c->x = sx;
 279         if(c->y + c->h < bh)
 280                 c->y = bh;
 281         if(c->x > sw)
 282                 c->x = sw - c->w;
 283         if(c->y > sh)
 284                 c->y = sh - c->h;
 285         resizetitle(c);
 286         wc.x = c->x;
 287         wc.y = c->y;
 288         wc.width = c->w;
 289         wc.height = c->h;
 290         if(c->w == sw && c->h == sh)
 291                 wc.border_width = 0;
 292         else
 293                 wc.border_width = BORDERPX;
 294         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 295         configure(c);
 296         XSync(dpy, False);
 297 }
 298
 299 void
 300 resizetitle(Client *c) {
 301         c->tw = textw(c->name);
 302         if(c->tw > c->w)
 303                 c->tw = c->w + 2 * BORDERPX;
 304         c->tx = c->x + c->w - c->tw + 2 * BORDERPX;
 305         c->ty = c->y;
 306         if(isvisible(c))
 307                 XMoveResizeWindow(dpy, c->twin, c->tx, c->ty, c->tw, c->th);
 308         else
 309                 XMoveResizeWindow(dpy, c->twin, c->tx + 2 * sw, c->ty, c->tw, c->th);
 310 }
 311
 312 void
 313 updatesize(Client *c) {
 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 updatetitle(Client *c) {
 352         char **list = NULL;
 353         int n;
 354         XTextProperty name;
 355
 356         name.nitems = 0;
 357         c->name[0] = 0;
 358         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 359         if(!name.nitems)
 360                 XGetWMName(dpy, c->win, &name);
 361         if(!name.nitems)
 362                 return;
 363         if(name.encoding == XA_STRING)
 364                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 365         else {
 366                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 367                                 && n > 0 && *list)
 368                 {
 369                         strncpy(c->name, *list, sizeof(c->name));
 370                         XFreeStringList(list);
 371                 }
 372         }
 373         XFree(name.value);
 374 }
 375
 376 void
 377 unmanage(Client *c) {
 378         Client *nc;
 379
 380         /* The server grab construct avoids race conditions. */
 381         XGrabServer(dpy);
 382         XSetErrorHandler(xerrordummy);
 383         detach(c);
 384         detachstack(c);
 385         if(sel == c) {
 386                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 387                 focus(nc);
 388         }
 389         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 390         XDestroyWindow(dpy, c->twin);
 391         free(c->tags);
 392         free(c);
 393         XSync(dpy, False);
 394         XSetErrorHandler(xerror);
 395         XUngrabServer(dpy);
 396         arrange(NULL);
 397 }