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 grabbutton(Client *c, unsigned int button, unsigned int modifier)
  15 {
  16         XGrabButton(dpy, button, modifier, c->win, False, BUTTONMASK,
  17                         GrabModeAsync, GrabModeSync, None, None);
  18         XGrabButton(dpy, button, modifier | LockMask, c->win, False, BUTTONMASK,
  19                         GrabModeAsync, GrabModeSync, None, None);
  20         XGrabButton(dpy, button, modifier | numlockmask, c->win, False, BUTTONMASK,
  21                         GrabModeAsync, GrabModeSync, None, None);
  22         XGrabButton(dpy, button, modifier | numlockmask | LockMask, c->win, False, BUTTONMASK,
  23                         GrabModeAsync, GrabModeSync, None, None);
  24 }
  25
  26 static void
  27 resizetitle(Client *c)
  28 {
  29         int i;
  30
  31         c->tw = textw(c->name);
  32         if(c->tw > c->w)
  33                 c->tw = c->w + 2;
  34         c->tx = c->x + c->w - c->tw + 2;
  35         c->ty = c->y;
  36         if(isvisible(c))
  37                 XMoveResizeWindow(dpy, c->twin, c->tx, c->ty, c->tw, c->th);
  38         else
  39                 XMoveResizeWindow(dpy, c->twin, c->tx + 2 * sw, c->ty, c->tw, c->th);
  40
  41 }
  42
  43 static void
  44 ungrabbutton(Client *c, unsigned int button, unsigned int modifier)
  45 {
  46         XUngrabButton(dpy, button, modifier, c->win);
  47         XUngrabButton(dpy, button, modifier | LockMask, c->win);
  48         XUngrabButton(dpy, button, modifier | numlockmask, c->win);
  49         XUngrabButton(dpy, button, modifier | numlockmask | LockMask, c->win);
  50 }
  51
  52 static int
  53 xerrordummy(Display *dsply, XErrorEvent *ee)
  54 {
  55         return 0;
  56 }
  57
  58 /* extern functions */
  59
  60 void
  61 ban(Client *c)
  62 {
  63         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  64         XMoveWindow(dpy, c->twin, c->tx + 2 * sw, c->ty);
  65 }
  66
  67 void
  68 focus(Client *c)
  69 {
  70         Client *old = sel;
  71
  72         if(!issel)
  73                 return;
  74         if(!sel)
  75                 sel = c;
  76         else if(sel != c) {
  77                 if(sel->ismax)
  78                         togglemax(NULL);
  79                 sel = c;
  80                 grabbutton(old, AnyButton, 0);
  81                 drawtitle(old);
  82         }
  83         ungrabbutton(c, AnyButton, 0);
  84         drawtitle(c);
  85         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
  86 }
  87
  88 Client *
  89 getclient(Window w)
  90 {
  91         Client *c;
  92
  93         for(c = clients; c; c = c->next)
  94                 if(c->win == w)
  95                         return c;
  96         return NULL;
  97 }
  98
  99 Client *
 100 getctitle(Window w)
 101 {
 102         Client *c;
 103
 104         for(c = clients; c; c = c->next)
 105                 if(c->twin == w)
 106                         return c;
 107         return NULL;
 108 }
 109
 110 void
 111 gravitate(Client *c, Bool invert)
 112 {
 113         int dx = 0, dy = 0;
 114
 115         switch(c->grav) {
 116         default:
 117                 break;
 118         case StaticGravity:
 119         case NorthWestGravity:
 120         case NorthGravity:
 121         case NorthEastGravity:
 122                 dy = c->border;
 123                 break;
 124         case EastGravity:
 125         case CenterGravity:
 126         case WestGravity:
 127                 dy = -(c->h / 2) + c->border;
 128                 break;
 129         case SouthEastGravity:
 130         case SouthGravity:
 131         case SouthWestGravity:
 132                 dy = -(c->h);
 133                 break;
 134         }
 135
 136         switch (c->grav) {
 137         default:
 138                 break;
 139         case StaticGravity:
 140         case NorthWestGravity:
 141         case WestGravity:
 142         case SouthWestGravity:
 143                 dx = c->border;
 144                 break;
 145         case NorthGravity:
 146         case CenterGravity:
 147         case SouthGravity:
 148                 dx = -(c->w / 2) + c->border;
 149                 break;
 150         case NorthEastGravity:
 151         case EastGravity:
 152         case SouthEastGravity:
 153                 dx = -(c->w + c->border);
 154                 break;
 155         }
 156
 157         if(invert) {
 158                 dx = -dx;
 159                 dy = -dy;
 160         }
 161         c->x += dx;
 162         c->y += dy;
 163 }
 164
 165 void
 166 killclient(Arg *arg)
 167 {
 168         if(!sel)
 169                 return;
 170         if(sel->proto & PROTODELWIN)
 171                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 172         else
 173                 XKillClient(dpy, sel->win);
 174 }
 175
 176 void
 177 manage(Window w, XWindowAttributes *wa)
 178 {
 179         unsigned int i;
 180         Client *c, *tc;
 181         Window trans;
 182         XSetWindowAttributes twa;
 183
 184         c = emallocz(sizeof(Client));
 185         c->tags = emallocz(ntags * sizeof(Bool));
 186         c->win = w;
 187         c->x = c->tx = wa->x;
 188         c->y = c->ty = wa->y;
 189         c->w = c->tw = wa->width;
 190         c->h = wa->height;
 191         c->th = bh;
 192
 193         c->border = 0;
 194         setsize(c);
 195
 196         if(c->x + c->w + 2 > sw)
 197                 c->x = sw - c->w - 2;
 198         if(c->x < 0)
 199                 c->x = 0;
 200         if(c->y + c->h + 2 > sh)
 201                 c->y = sh - c->h - 2;
 202         if(c->h != sh && c->y < bh)
 203                 c->y = bh;
 204
 205         c->proto = getproto(c->win);
 206         XSelectInput(dpy, c->win,
 207                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 208         XGetTransientForHint(dpy, c->win, &trans);
 209         twa.override_redirect = 1;
 210         twa.background_pixmap = ParentRelative;
 211         twa.event_mask = ExposureMask | EnterWindowMask;
 212
 213         c->twin = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 214                         0, DefaultDepth(dpy, screen), CopyFromParent,
 215                         DefaultVisual(dpy, screen),
 216                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 217
 218         if(clients)
 219                 clients->prev = c;
 220         c->next = clients;
 221         clients = c;
 222
 223         grabbutton(c, Button1, MODKEY);
 224         grabbutton(c, Button2, MODKEY);
 225         grabbutton(c, Button3, MODKEY);
 226
 227         if((tc = getclient(trans))) /* inherit tags */
 228                 for(i = 0; i < ntags; i++)
 229                         c->tags[i] = tc->tags[i];
 230         else
 231                 settags(c);
 232         if(!c->isfloat)
 233                 c->isfloat = trans
 234                         || (c->maxw && c->minw &&
 235                                 c->maxw == c->minw && c->maxh == c->minh);
 236         settitle(c);
 237         if(isvisible(c))
 238                 sel = c;
 239         arrange(NULL);
 240         XMapWindow(dpy, c->win);
 241         XMapWindow(dpy, c->twin);
 242         if(isvisible(c))
 243                 focus(c);
 244 }
 245
 246 void
 247 resize(Client *c, Bool sizehints, Corner sticky)
 248 {
 249         int bottom = c->y + c->h;
 250         int right = c->x + c->w;
 251         XWindowChanges wc;
 252
 253         if(sizehints) {
 254                 if(c->incw)
 255                         c->w -= (c->w - c->basew) % c->incw;
 256                 if(c->inch)
 257                         c->h -= (c->h - c->baseh) % c->inch;
 258                 if(c->minw && c->w < c->minw)
 259                         c->w = c->minw;
 260                 if(c->minh && c->h < c->minh)
 261                         c->h = c->minh;
 262                 if(c->maxw && c->w > c->maxw)
 263                         c->w = c->maxw;
 264                 if(c->maxh && c->h > c->maxh)
 265                         c->h = c->maxh;
 266         }
 267         if(sticky == TopRight || sticky == BotRight)
 268                 c->x = right - c->w;
 269         if(sticky == BotLeft || sticky == BotRight)
 270                 c->y = bottom - c->h;
 271
 272         resizetitle(c);
 273         wc.x = c->x;
 274         wc.y = c->y;
 275         wc.width = c->w;
 276         wc.height = c->h;
 277         if(c->w == sw && c->h == sh)
 278                 wc.border_width = 0;
 279         else
 280                 wc.border_width = 1;
 281         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 282         XSync(dpy, False);
 283 }
 284
 285 void
 286 setsize(Client *c)
 287 {
 288         long msize;
 289         XSizeHints size;
 290
 291         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 292                 size.flags = PSize;
 293         c->flags = size.flags;
 294         if(c->flags & PBaseSize) {
 295                 c->basew = size.base_width;
 296                 c->baseh = size.base_height;
 297         }
 298         else
 299                 c->basew = c->baseh = 0;
 300         if(c->flags & PResizeInc) {
 301                 c->incw = size.width_inc;
 302                 c->inch = size.height_inc;
 303         }
 304         else
 305                 c->incw = c->inch = 0;
 306         if(c->flags & PMaxSize) {
 307                 c->maxw = size.max_width;
 308                 c->maxh = size.max_height;
 309         }
 310         else
 311                 c->maxw = c->maxh = 0;
 312         if(c->flags & PMinSize) {
 313                 c->minw = size.min_width;
 314                 c->minh = size.min_height;
 315         }
 316         else
 317                 c->minw = c->minh = 0;
 318         if(c->flags & PWinGravity)
 319                 c->grav = size.win_gravity;
 320         else
 321                 c->grav = NorthWestGravity;
 322 }
 323
 324 void
 325 settitle(Client *c)
 326 {
 327         char **list = NULL;
 328         int i, n;
 329         XTextProperty name;
 330
 331         name.nitems = 0;
 332         c->name[0] = 0;
 333         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 334         if(!name.nitems)
 335                 XGetWMName(dpy, c->win, &name);
 336         if(!name.nitems)
 337                 return;
 338         if(name.encoding == XA_STRING)
 339                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 340         else {
 341                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 342                                 && n > 0 && *list)
 343                 {
 344                         strncpy(c->name, *list, sizeof(c->name));
 345                         XFreeStringList(list);
 346                 }
 347         }
 348         XFree(name.value);
 349         resizetitle(c);
 350 }
 351
 352 void
 353 togglemax(Arg *arg)
 354 {
 355         int ox, oy, ow, oh;
 356         XEvent ev;
 357
 358         if(!sel)
 359                 return;
 360
 361         if((sel->ismax = !sel->ismax)) {
 362                 ox = sel->x;
 363                 oy = sel->y;
 364                 ow = sel->w;
 365                 oh = sel->h;
 366                 sel->x = sx;
 367                 sel->y = sy + bh;
 368                 sel->w = sw - 2;
 369                 sel->h = sh - 2 - bh;
 370
 371                 restack();
 372                 resize(sel, arrange == dofloat, TopLeft);
 373
 374                 sel->x = ox;
 375                 sel->y = oy;
 376                 sel->w = ow;
 377                 sel->h = oh;
 378         }
 379         else
 380                 resize(sel, False, TopLeft);
 381         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 382 }
 383
 384 void
 385 unmanage(Client *c)
 386 {
 387         XGrabServer(dpy);
 388         XSetErrorHandler(xerrordummy);
 389
 390         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 391         XDestroyWindow(dpy, c->twin);
 392
 393         if(c->prev)
 394                 c->prev->next = c->next;
 395         if(c->next)
 396                 c->next->prev = c->prev;
 397         if(c == clients)
 398                 clients = c->next;
 399         if(sel == c)
 400                 sel = getnext(clients);
 401         free(c->tags);
 402         free(c);
 403
 404         XSync(dpy, False);
 405         XSetErrorHandler(xerror);
 406         XUngrabServer(dpy);
 407         if(sel)
 408                 focus(sel);
 409         arrange(NULL);
 410 }