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                 old = sel;
  93                 sel = c;
  94                 if(old) {
  95                         grabbuttons(old, False);
  96                         drawtitle(old);
  97                 }
  98         }
  99         if(c) {
 100                 detachstack(c);
 101                 c->snext = stack;
 102                 stack = c;
 103                 grabbuttons(c, True);
 104                 drawtitle(c);
 105                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 106         }
 107         else
 108                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 109 }
 110
 111 Client *
 112 getclient(Window w) {
 113         Client *c;
 114
 115         for(c = clients; c; c = c->next)
 116                 if(c->win == w)
 117                         return c;
 118         return NULL;
 119 }
 120
 121 Client *
 122 getctitle(Window w) {
 123         Client *c;
 124
 125         for(c = clients; c; c = c->next)
 126                 if(c->twin == w)
 127                         return c;
 128         return NULL;
 129 }
 130
 131 void
 132 gravitate(Client *c, Bool invert) {
 133         int dx = 0, dy = 0;
 134
 135         switch(c->grav) {
 136         default:
 137                 break;
 138         case StaticGravity:
 139         case NorthWestGravity:
 140         case NorthGravity:
 141         case NorthEastGravity:
 142                 dy = c->border;
 143                 break;
 144         case EastGravity:
 145         case CenterGravity:
 146         case WestGravity:
 147                 dy = -(c->h / 2) + c->border;
 148                 break;
 149         case SouthEastGravity:
 150         case SouthGravity:
 151         case SouthWestGravity:
 152                 dy = -(c->h);
 153                 break;
 154         }
 155
 156         switch (c->grav) {
 157         default:
 158                 break;
 159         case StaticGravity:
 160         case NorthWestGravity:
 161         case WestGravity:
 162         case SouthWestGravity:
 163                 dx = c->border;
 164                 break;
 165         case NorthGravity:
 166         case CenterGravity:
 167         case SouthGravity:
 168                 dx = -(c->w / 2) + c->border;
 169                 break;
 170         case NorthEastGravity:
 171         case EastGravity:
 172         case SouthEastGravity:
 173                 dx = -(c->w + c->border);
 174                 break;
 175         }
 176
 177         if(invert) {
 178                 dx = -dx;
 179                 dy = -dy;
 180         }
 181         c->x += dx;
 182         c->y += dy;
 183 }
 184
 185 void
 186 killclient(Arg *arg) {
 187         if(!sel)
 188                 return;
 189         if(sel->proto & PROTODELWIN)
 190                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 191         else
 192                 XKillClient(dpy, sel->win);
 193 }
 194
 195 void
 196 manage(Window w, XWindowAttributes *wa) {
 197         Client *c;
 198         Window trans;
 199         XSetWindowAttributes twa;
 200
 201         c = emallocz(sizeof(Client));
 202         c->tags = emallocz(ntags * sizeof(Bool));
 203         c->win = w;
 204         c->x = c->tx = wa->x;
 205         c->y = c->ty = wa->y;
 206         c->w = c->tw = wa->width;
 207         c->h = wa->height;
 208         c->th = bh;
 209
 210         c->border = 0;
 211         updatesize(c);
 212
 213         if(c->x + c->w + 2 > sw)
 214                 c->x = sw - c->w - 2;
 215         if(c->x < 0)
 216                 c->x = 0;
 217         if(c->y + c->h + 2 > sh)
 218                 c->y = sh - c->h - 2;
 219         if(c->h != sh && c->y < bh)
 220                 c->y = bh;
 221
 222         c->proto = getproto(c->win);
 223         XSelectInput(dpy, c->win,
 224                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 225         XGetTransientForHint(dpy, c->win, &trans);
 226         twa.override_redirect = 1;
 227         twa.background_pixmap = ParentRelative;
 228         twa.event_mask = ExposureMask | EnterWindowMask;
 229
 230         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 231                         0, DefaultDepth(dpy, screen), CopyFromParent,
 232                         DefaultVisual(dpy, screen),
 233                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 234
 235         grabbuttons(c, False);
 236         settags(c, getclient(trans));
 237         if(!c->isfloat)
 238                 c->isfloat = trans
 239                         || (c->maxw && c->minw &&
 240                                 c->maxw == c->minw && c->maxh == c->minh);
 241
 242         if(clients)
 243                 clients->prev = c;
 244         c->next = clients;
 245         c->snext = stack;
 246         stack = clients = c;
 247
 248         updatetitle(c);
 249         ban(c);
 250         XMapWindow(dpy, c->win);
 251         XMapWindow(dpy, c->twin);
 252         if(isvisible(c))
 253                 focus(c);
 254         arrange(NULL);
 255 }
 256
 257 void
 258 resize(Client *c, Bool sizehints, Corner sticky) {
 259         int bottom = c->y + c->h;
 260         int right = c->x + c->w;
 261         XWindowChanges wc;
 262
 263         if(sizehints) {
 264                 if(c->incw)
 265                         c->w -= (c->w - c->basew) % c->incw;
 266                 if(c->inch)
 267                         c->h -= (c->h - c->baseh) % c->inch;
 268                 if(c->minw && c->w < c->minw)
 269                         c->w = c->minw;
 270                 if(c->minh && c->h < c->minh)
 271                         c->h = c->minh;
 272                 if(c->maxw && c->w > c->maxw)
 273                         c->w = c->maxw;
 274                 if(c->maxh && c->h > c->maxh)
 275                         c->h = c->maxh;
 276         }
 277         if(sticky == TopRight || sticky == BotRight)
 278                 c->x = right - c->w;
 279         if(sticky == BotLeft || sticky == BotRight)
 280                 c->y = bottom - c->h;
 281
 282         /* offscreen appearance fixes */
 283         if(c->x + c->w < 0)
 284                 c->x = 0;
 285         if(c->y + c->h < bh)
 286                 c->y = bh;
 287         if(c->x > sw)
 288                 c->x = sw - c->w;
 289         if(c->y > sh)
 290                 c->y = sh - c->h;
 291
 292         resizetitle(c);
 293         wc.x = c->x;
 294         wc.y = c->y;
 295         wc.width = c->w;
 296         wc.height = c->h;
 297         if(c->w == sw && c->h == sh)
 298                 wc.border_width = 0;
 299         else
 300                 wc.border_width = 1;
 301         XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
 302         XSync(dpy, False);
 303 }
 304
 305 void
 306 updatesize(Client *c) {
 307         long msize;
 308         XSizeHints size;
 309
 310         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 311                 size.flags = PSize;
 312         c->flags = size.flags;
 313         if(c->flags & PBaseSize) {
 314                 c->basew = size.base_width;
 315                 c->baseh = size.base_height;
 316         }
 317         else
 318                 c->basew = c->baseh = 0;
 319         if(c->flags & PResizeInc) {
 320                 c->incw = size.width_inc;
 321                 c->inch = size.height_inc;
 322         }
 323         else
 324                 c->incw = c->inch = 0;
 325         if(c->flags & PMaxSize) {
 326                 c->maxw = size.max_width;
 327                 c->maxh = size.max_height;
 328         }
 329         else
 330                 c->maxw = c->maxh = 0;
 331         if(c->flags & PMinSize) {
 332                 c->minw = size.min_width;
 333                 c->minh = size.min_height;
 334         }
 335         else
 336                 c->minw = c->minh = 0;
 337         if(c->flags & PWinGravity)
 338                 c->grav = size.win_gravity;
 339         else
 340                 c->grav = NorthWestGravity;
 341 }
 342
 343 void
 344 updatetitle(Client *c) {
 345         char **list = NULL;
 346         int n;
 347         XTextProperty name;
 348
 349         name.nitems = 0;
 350         c->name[0] = 0;
 351         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 352         if(!name.nitems)
 353                 XGetWMName(dpy, c->win, &name);
 354         if(!name.nitems)
 355                 return;
 356         if(name.encoding == XA_STRING)
 357                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 358         else {
 359                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 360                                 && n > 0 && *list)
 361                 {
 362                         strncpy(c->name, *list, sizeof(c->name));
 363                         XFreeStringList(list);
 364                 }
 365         }
 366         XFree(name.value);
 367         resizetitle(c);
 368 }
 369
 370 void
 371 unmanage(Client *c) {
 372         Client *nc;
 373
 374         /* The server grab construct avoids race conditions. */
 375         XGrabServer(dpy);
 376         XSetErrorHandler(xerrordummy);
 377
 378         detach(c);
 379         detachstack(c);
 380         if(sel == c) {
 381                 for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
 382                 focus(nc);
 383         }
 384
 385         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 386         XDestroyWindow(dpy, c->twin);
 387
 388         free(c->tags);
 389         free(c);
 390
 391         XSync(dpy, False);
 392         XSetErrorHandler(xerror);
 393         XUngrabServer(dpy);
 394         arrange(NULL);
 395 }