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 int
  58 xerrordummy(Display *dsply, XErrorEvent *ee) {
  59         return 0;
  60 }
  61
  62 /* extern functions */
  63
  64 void
  65 ban(Client *c) {
  66         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  67         XMoveWindow(dpy, c->twin, c->tx + 2 * sw, c->ty);
  68 }
  69
  70 void
  71 configure(Client *c) {
  72         XEvent synev;
  73
  74         synev.type = ConfigureNotify;
  75         synev.xconfigure.display = dpy;
  76         synev.xconfigure.event = c->win;
  77         synev.xconfigure.window = c->win;
  78         synev.xconfigure.x = c->x;
  79         synev.xconfigure.y = c->y;
  80         synev.xconfigure.width = c->w;
  81         synev.xconfigure.height = c->h;
  82         synev.xconfigure.border_width = c->border;
  83         synev.xconfigure.above = None;
  84         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  85 }
  86
  87 void
  88 focus(Client *c) {
  89         Client *old;
  90
  91         if(!issel || (c && !isvisible(c)))
  92                 return;
  93         if(!sel)
  94                 sel = c;
  95         else if(sel != c) {
  96                 old = sel;
  97                 sel = c;
  98                 if(old) {
  99                         grabbuttons(old, False);
 100                         drawtitle(old);
 101                 }
 102         }
 103         if(c) {
 104                 detachstack(c);
 105                 c->snext = stack;
 106                 stack = c;
 107                 grabbuttons(c, True);
 108                 drawtitle(c);
 109                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 110         }
 111         else
 112                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 113 }
 114
 115 Client *
 116 getclient(Window w) {
 117         Client *c;
 118
 119         for(c = clients; c; c = c->next)
 120                 if(c->win == w)
 121                         return c;
 122         return NULL;
 123 }
 124
 125 Client *
 126 getctitle(Window w) {
 127         Client *c;
 128
 129         for(c = clients; c; c = c->next)
 130                 if(c->twin == w)
 131                         return c;
 132         return NULL;
 133 }
 134
 135 void
 136 gravitate(Client *c, Bool invert) {
 137         int dx = 0, dy = 0;
 138
 139         switch(c->grav) {
 140         default:
 141                 break;
 142         case StaticGravity:
 143         case NorthWestGravity:
 144         case NorthGravity:
 145         case NorthEastGravity:
 146                 dy = c->border;
 147                 break;
 148         case EastGravity:
 149         case CenterGravity:
 150         case WestGravity:
 151                 dy = -(c->h / 2) + c->border;
 152                 break;
 153         case SouthEastGravity:
 154         case SouthGravity:
 155         case SouthWestGravity:
 156                 dy = -(c->h);
 157                 break;
 158         }
 159
 160         switch (c->grav) {
 161         default:
 162                 break;
 163         case StaticGravity:
 164         case NorthWestGravity:
 165         case WestGravity:
 166         case SouthWestGravity:
 167                 dx = c->border;
 168                 break;
 169         case NorthGravity:
 170         case CenterGravity:
 171         case SouthGravity:
 172                 dx = -(c->w / 2) + c->border;
 173                 break;
 174         case NorthEastGravity:
 175         case EastGravity:
 176         case SouthEastGravity:
 177                 dx = -(c->w + c->border);
 178                 break;
 179         }
 180
 181         if(invert) {
 182                 dx = -dx;
 183                 dy = -dy;
 184         }
 185         c->x += dx;
 186         c->y += dy;
 187 }
 188
 189 void
 190 killclient(Arg *arg) {
 191         if(!sel)
 192                 return;
 193         if(sel->proto & PROTODELWIN)
 194                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 195         else
 196                 XKillClient(dpy, sel->win);
 197 }
 198
 199 void
 200 manage(Window w, XWindowAttributes *wa) {
 201         Client *c;
 202         Window trans;
 203         XSetWindowAttributes twa;
 204
 205         c = emallocz(sizeof(Client));
 206         c->tags = emallocz(ntags * sizeof(Bool));
 207         c->win = w;
 208         c->x = c->tx = wa->x;
 209         c->y = c->ty = wa->y;
 210         c->w = c->tw = wa->width;
 211         c->h = wa->height;
 212         c->th = bh;
 213
 214         c->border = 0;
 215         updatesize(c);
 216
 217         if(c->x + c->w + 2 * BORDERPX > sw)
 218                 c->x = sw - c->w - 2 * BORDERPX;
 219         if(c->x < sx)
 220                 c->x = sx;
 221         if(c->y + c->h + 2 * BORDERPX > sh)
 222                 c->y = sh - c->h - 2 * BORDERPX;
 223         if(c->h != sh && c->y < bh)
 224                 c->y = bh;
 225
 226         c->proto = getproto(c->win);
 227         XSelectInput(dpy, c->win,
 228                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 229         XGetTransientForHint(dpy, c->win, &trans);
 230         twa.override_redirect = 1;
 231         twa.background_pixmap = ParentRelative;
 232         twa.event_mask = ExposureMask | EnterWindowMask;
 233
 234         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 235                         0, DefaultDepth(dpy, screen), CopyFromParent,
 236                         DefaultVisual(dpy, screen),
 237                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 238
 239         grabbuttons(c, False);
 240         updatetitle(c);
 241         settags(c, getclient(trans));
 242         if(!c->isfloat)
 243                 c->isfloat = trans
 244                         || (c->maxw && c->minw &&
 245                                 c->maxw == c->minw && c->maxh == c->minh);
 246         resizetitle(c);
 247
 248         if(clients)
 249                 clients->prev = c;
 250         c->next = clients;
 251         c->snext = stack;
 252         stack = clients = c;
 253
 254         ban(c);
 255         XMapWindow(dpy, c->win);
 256         XMapWindow(dpy, c->twin);
 257         if(isvisible(c))
 258                 focus(c);
 259         arrange(NULL);
 260 }
 261
 262 void
 263 resize(Client *c, Bool sizehints, Corner sticky) {
 264         int bottom = c->y + c->h;
 265         int right = c->x + c->w;
 266         XWindowChanges wc;
 267
 268         if(sizehints) {
 269                 if(c->incw)
 270                         c->w -= (c->w - c->basew) % c->incw;
 271                 if(c->inch)
 272                         c->h -= (c->h - c->baseh) % c->inch;
 273                 if(c->minw && c->w < c->minw)
 274                         c->w = c->minw;
 275                 if(c->minh && c->h < c->minh)
 276                         c->h = c->minh;
 277                 if(c->maxw && c->w > c->maxw)
 278                         c->w = c->maxw;
 279                 if(c->maxh && c->h > c->maxh)
 280                         c->h = c->maxh;
 281         }
 282         if(sticky == TopRight || sticky == BotRight)
 283                 c->x = right - c->w;
 284         if(sticky == BotLeft || sticky == BotRight)
 285                 c->y = bottom - c->h;
 286
 287         /* offscreen appearance fixes */
 288         if(c->x + c->w < sx)
 289                 c->x = sx;
 290         if(c->y + c->h < bh)
 291                 c->y = bh;
 292         if(c->x > sw)
 293                 c->x = sw - c->w;
 294         if(c->y > sh)
 295                 c->y = sh - c->h;
 296
 297         resizetitle(c);
 298         wc.x = c->x;
 299         wc.y = c->y;
 300         wc.width = c->w;
 301         wc.height = c->h;
 302         if(c->w == sw && c->h == sh)
 303                 wc.border_width = 0;
 304         else
 305                 wc.border_width = BORDERPX;
 306         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 307         configure(c);
 308         XSync(dpy, False);
 309 }
 310
 311 void
 312 resizetitle(Client *c) {
 313         c->tw = textw(c->name);
 314         if(c->tw > c->w)
 315                 c->tw = c->w + 2 * BORDERPX;
 316         c->tx = c->x + c->w - c->tw + 2 * BORDERPX;
 317         c->ty = c->y;
 318         if(isvisible(c))
 319                 XMoveResizeWindow(dpy, c->twin, c->tx, c->ty, c->tw, c->th);
 320         else
 321                 XMoveResizeWindow(dpy, c->twin, c->tx + 2 * sw, c->ty, c->tw, c->th);
 322 }
 323
 324 void
 325 updatesize(Client *c) {
 326         long msize;
 327         XSizeHints size;
 328
 329         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 330                 size.flags = PSize;
 331         c->flags = size.flags;
 332         if(c->flags & PBaseSize) {
 333                 c->basew = size.base_width;
 334                 c->baseh = size.base_height;
 335         }
 336         else
 337                 c->basew = c->baseh = 0;
 338         if(c->flags & PResizeInc) {
 339                 c->incw = size.width_inc;
 340                 c->inch = size.height_inc;
 341         }
 342         else
 343                 c->incw = c->inch = 0;
 344         if(c->flags & PMaxSize) {
 345                 c->maxw = size.max_width;
 346                 c->maxh = size.max_height;
 347         }
 348         else
 349                 c->maxw = c->maxh = 0;
 350         if(c->flags & PMinSize) {
 351                 c->minw = size.min_width;
 352                 c->minh = size.min_height;
 353         }
 354         else
 355                 c->minw = c->minh = 0;
 356         if(c->flags & PWinGravity)
 357                 c->grav = size.win_gravity;
 358         else
 359                 c->grav = NorthWestGravity;
 360 }
 361
 362 void
 363 updatetitle(Client *c) {
 364         char **list = NULL;
 365         int n;
 366         XTextProperty name;
 367
 368         name.nitems = 0;
 369         c->name[0] = 0;
 370         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 371         if(!name.nitems)
 372                 XGetWMName(dpy, c->win, &name);
 373         if(!name.nitems)
 374                 return;
 375         if(name.encoding == XA_STRING)
 376                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 377         else {
 378                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 379                                 && n > 0 && *list)
 380                 {
 381                         strncpy(c->name, *list, sizeof(c->name));
 382                         XFreeStringList(list);
 383                 }
 384         }
 385         XFree(name.value);
 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 }