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 configure(Client *c) {
  85         XEvent synev;
  86
  87         synev.type = ConfigureNotify;
  88         synev.xconfigure.display = dpy;
  89         synev.xconfigure.event = c->win;
  90         synev.xconfigure.window = c->win;
  91         synev.xconfigure.x = c->x;
  92         synev.xconfigure.y = c->y;
  93         synev.xconfigure.width = c->w;
  94         synev.xconfigure.height = c->h;
  95         synev.xconfigure.border_width = c->border;
  96         synev.xconfigure.above = None;
  97         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  98 }
  99
 100 void
 101 focus(Client *c) {
 102         Client *old;
 103
 104         if(!issel || (c && !isvisible(c)))
 105                 return;
 106         if(!sel)
 107                 sel = c;
 108         else if(sel != c) {
 109                 old = sel;
 110                 sel = c;
 111                 if(old) {
 112                         grabbuttons(old, False);
 113                         drawtitle(old);
 114                 }
 115         }
 116         if(c) {
 117                 detachstack(c);
 118                 c->snext = stack;
 119                 stack = c;
 120                 grabbuttons(c, True);
 121                 drawtitle(c);
 122                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 123         }
 124         else
 125                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 126 }
 127
 128 Client *
 129 getclient(Window w) {
 130         Client *c;
 131
 132         for(c = clients; c; c = c->next)
 133                 if(c->win == w)
 134                         return c;
 135         return NULL;
 136 }
 137
 138 Client *
 139 getctitle(Window w) {
 140         Client *c;
 141
 142         for(c = clients; c; c = c->next)
 143                 if(c->twin == w)
 144                         return c;
 145         return NULL;
 146 }
 147
 148 void
 149 gravitate(Client *c, Bool invert) {
 150         int dx = 0, dy = 0;
 151
 152         switch(c->grav) {
 153         default:
 154                 break;
 155         case StaticGravity:
 156         case NorthWestGravity:
 157         case NorthGravity:
 158         case NorthEastGravity:
 159                 dy = c->border;
 160                 break;
 161         case EastGravity:
 162         case CenterGravity:
 163         case WestGravity:
 164                 dy = -(c->h / 2) + c->border;
 165                 break;
 166         case SouthEastGravity:
 167         case SouthGravity:
 168         case SouthWestGravity:
 169                 dy = -(c->h);
 170                 break;
 171         }
 172
 173         switch (c->grav) {
 174         default:
 175                 break;
 176         case StaticGravity:
 177         case NorthWestGravity:
 178         case WestGravity:
 179         case SouthWestGravity:
 180                 dx = c->border;
 181                 break;
 182         case NorthGravity:
 183         case CenterGravity:
 184         case SouthGravity:
 185                 dx = -(c->w / 2) + c->border;
 186                 break;
 187         case NorthEastGravity:
 188         case EastGravity:
 189         case SouthEastGravity:
 190                 dx = -(c->w + c->border);
 191                 break;
 192         }
 193
 194         if(invert) {
 195                 dx = -dx;
 196                 dy = -dy;
 197         }
 198         c->x += dx;
 199         c->y += dy;
 200 }
 201
 202 void
 203 killclient(Arg *arg) {
 204         if(!sel)
 205                 return;
 206         if(sel->proto & PROTODELWIN)
 207                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 208         else
 209                 XKillClient(dpy, sel->win);
 210 }
 211
 212 void
 213 manage(Window w, XWindowAttributes *wa) {
 214         Client *c;
 215         Window trans;
 216         XSetWindowAttributes twa;
 217
 218         c = emallocz(sizeof(Client));
 219         c->tags = emallocz(ntags * sizeof(Bool));
 220         c->win = w;
 221         c->x = c->tx = wa->x;
 222         c->y = c->ty = wa->y;
 223         c->w = c->tw = wa->width;
 224         c->h = wa->height;
 225         c->th = bh;
 226
 227         c->border = 0;
 228         updatesize(c);
 229
 230         if(c->x + c->w + 2 > sw)
 231                 c->x = sw - c->w - 2;
 232         if(c->x < 0)
 233                 c->x = 0;
 234         if(c->y + c->h + 2 > sh)
 235                 c->y = sh - c->h - 2;
 236         if(c->h != sh && c->y < bh)
 237                 c->y = bh;
 238
 239         c->proto = getproto(c->win);
 240         XSelectInput(dpy, c->win,
 241                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 242         XGetTransientForHint(dpy, c->win, &trans);
 243         twa.override_redirect = 1;
 244         twa.background_pixmap = ParentRelative;
 245         twa.event_mask = ExposureMask | EnterWindowMask;
 246
 247         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 248                         0, DefaultDepth(dpy, screen), CopyFromParent,
 249                         DefaultVisual(dpy, screen),
 250                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 251
 252         grabbuttons(c, False);
 253         settags(c, getclient(trans));
 254         if(!c->isfloat)
 255                 c->isfloat = trans
 256                         || (c->maxw && c->minw &&
 257                                 c->maxw == c->minw && c->maxh == c->minh);
 258
 259         if(clients)
 260                 clients->prev = c;
 261         c->next = clients;
 262         c->snext = stack;
 263         stack = clients = c;
 264
 265         updatetitle(c);
 266         ban(c);
 267         XMapWindow(dpy, c->win);
 268         XMapWindow(dpy, c->twin);
 269         if(isvisible(c))
 270                 focus(c);
 271         arrange(NULL);
 272 }
 273
 274 void
 275 resize(Client *c, Bool sizehints, Corner sticky) {
 276         int bottom = c->y + c->h;
 277         int right = c->x + c->w;
 278         XWindowChanges wc;
 279
 280         if(sizehints) {
 281                 if(c->incw)
 282                         c->w -= (c->w - c->basew) % c->incw;
 283                 if(c->inch)
 284                         c->h -= (c->h - c->baseh) % c->inch;
 285                 if(c->minw && c->w < c->minw)
 286                         c->w = c->minw;
 287                 if(c->minh && c->h < c->minh)
 288                         c->h = c->minh;
 289                 if(c->maxw && c->w > c->maxw)
 290                         c->w = c->maxw;
 291                 if(c->maxh && c->h > c->maxh)
 292                         c->h = c->maxh;
 293         }
 294         if(sticky == TopRight || sticky == BotRight)
 295                 c->x = right - c->w;
 296         if(sticky == BotLeft || sticky == BotRight)
 297                 c->y = bottom - c->h;
 298
 299         /* offscreen appearance fixes */
 300         if(c->x + c->w < 0)
 301                 c->x = 0;
 302         if(c->y + c->h < bh)
 303                 c->y = bh;
 304         if(c->x > sw)
 305                 c->x = sw - c->w;
 306         if(c->y > sh)
 307                 c->y = sh - c->h;
 308
 309         resizetitle(c);
 310         wc.x = c->x;
 311         wc.y = c->y;
 312         wc.width = c->w;
 313         wc.height = c->h;
 314         if(c->w == sw && c->h == sh)
 315                 wc.border_width = 0;
 316         else
 317                 wc.border_width = 1;
 318         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 319         configure(c);
 320         XSync(dpy, False);
 321 }
 322
 323 void
 324 updatesize(Client *c) {
 325         long msize;
 326         XSizeHints size;
 327
 328         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 329                 size.flags = PSize;
 330         c->flags = size.flags;
 331         if(c->flags & PBaseSize) {
 332                 c->basew = size.base_width;
 333                 c->baseh = size.base_height;
 334         }
 335         else
 336                 c->basew = c->baseh = 0;
 337         if(c->flags & PResizeInc) {
 338                 c->incw = size.width_inc;
 339                 c->inch = size.height_inc;
 340         }
 341         else
 342                 c->incw = c->inch = 0;
 343         if(c->flags & PMaxSize) {
 344                 c->maxw = size.max_width;
 345                 c->maxh = size.max_height;
 346         }
 347         else
 348                 c->maxw = c->maxh = 0;
 349         if(c->flags & PMinSize) {
 350                 c->minw = size.min_width;
 351                 c->minh = size.min_height;
 352         }
 353         else
 354                 c->minw = c->minh = 0;
 355         if(c->flags & PWinGravity)
 356                 c->grav = size.win_gravity;
 357         else
 358                 c->grav = NorthWestGravity;
 359 }
 360
 361 void
 362 updatetitle(Client *c) {
 363         char **list = NULL;
 364         int n;
 365         XTextProperty name;
 366
 367         name.nitems = 0;
 368         c->name[0] = 0;
 369         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 370         if(!name.nitems)
 371                 XGetWMName(dpy, c->win, &name);
 372         if(!name.nitems)
 373                 return;
 374         if(name.encoding == XA_STRING)
 375                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 376         else {
 377                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 378                                 && n > 0 && *list)
 379                 {
 380                         strncpy(c->name, *list, sizeof(c->name));
 381                         XFreeStringList(list);
 382                 }
 383         }
 384         XFree(name.value);
 385         resizetitle(c);
 386 }
 387
 388 void
 389 unmanage(Client *c) {
 390         Client *nc;
 391
 392         /* The server grab construct avoids race conditions. */
 393         XGrabServer(dpy);
 394         XSetErrorHandler(xerrordummy);
 395
 396         detach(c);
 397         detachstack(c);
 398         if(sel == c) {
 399                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 400                 focus(nc);
 401         }
 402
 403         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 404         XDestroyWindow(dpy, c->twin);
 405
 406         free(c->tags);
 407         free(c);
 408
 409         XSync(dpy, False);
 410         XSetErrorHandler(xerror);
 411         XUngrabServer(dpy);
 412         arrange(NULL);
 413 }