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 = 0;
  32         for(i = 0; i < ntags; i++)
  33                 if(c->tags[i])
  34                         c->tw += textw(tags[i]);
  35         c->tw += textw(c->name);
  36         if(c->tw > c->w)
  37                 c->tw = c->w + 2;
  38         c->tx = c->x + c->w - c->tw + 2;
  39         c->ty = c->y;
  40         if(isvisible(c))
  41                 XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
  42         else
  43                 XMoveResizeWindow(dpy, c->title, c->tx + 2 * sw, c->ty, c->tw, c->th);
  44
  45 }
  46
  47 static void
  48 ungrabbutton(Client *c, unsigned int button, unsigned int modifier)
  49 {
  50         XUngrabButton(dpy, button, modifier, c->win);
  51         XUngrabButton(dpy, button, modifier | LockMask, c->win);
  52         XUngrabButton(dpy, button, modifier | numlockmask, c->win);
  53         XUngrabButton(dpy, button, modifier | numlockmask | LockMask, c->win);
  54 }
  55
  56 static int
  57 xerrordummy(Display *dsply, XErrorEvent *ee)
  58 {
  59         return 0;
  60 }
  61
  62 /* extern functions */
  63
  64 void
  65 ban(Client *c)
  66 {
  67         XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
  68         XMoveWindow(dpy, c->title, c->tx + 2 * sw, c->ty);
  69 }
  70
  71 void
  72 focus(Client *c)
  73 {
  74         Client *old = sel;
  75
  76         if (!issel)
  77                 return;
  78         if(sel && sel->ismax && sel != c)
  79                 togglemax(NULL);
  80         sel = c;
  81         if(old && old != c) {
  82                 grabbutton(old, AnyButton, 0);
  83                 drawtitle(old);
  84         }
  85         ungrabbutton(c, AnyButton, 0);
  86         drawtitle(c);
  87         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
  88 }
  89
  90 void
  91 focusnext(Arg *arg)
  92 {
  93         Client *c;
  94
  95         if(!sel)
  96                 return;
  97
  98         if(!(c = getnext(sel->next)))
  99                 c = getnext(clients);
 100         if(c) {
 101                 focus(c);
 102                 restack();
 103         }
 104 }
 105
 106 void
 107 focusprev(Arg *arg)
 108 {
 109         Client *c;
 110
 111         if(!sel)
 112                 return;
 113
 114         if(!(c = getprev(sel->prev))) {
 115                 for(c = clients; c && c->next; c = c->next);
 116                 c = getprev(c);
 117         }
 118         if(c) {
 119                 focus(c);
 120                 restack();
 121         }
 122 }
 123
 124 Client *
 125 getclient(Window w)
 126 {
 127         Client *c;
 128
 129         for(c = clients; c; c = c->next)
 130                 if(c->win == w)
 131                         return c;
 132         return NULL;
 133 }
 134
 135 Client *
 136 getctitle(Window w)
 137 {
 138         Client *c;
 139
 140         for(c = clients; c; c = c->next)
 141                 if(c->title == w)
 142                         return c;
 143         return NULL;
 144 }
 145
 146 void
 147 gravitate(Client *c, Bool invert)
 148 {
 149         int dx = 0, dy = 0;
 150
 151         switch(c->grav) {
 152         default:
 153                 break;
 154         case StaticGravity:
 155         case NorthWestGravity:
 156         case NorthGravity:
 157         case NorthEastGravity:
 158                 dy = c->border;
 159                 break;
 160         case EastGravity:
 161         case CenterGravity:
 162         case WestGravity:
 163                 dy = -(c->h / 2) + c->border;
 164                 break;
 165         case SouthEastGravity:
 166         case SouthGravity:
 167         case SouthWestGravity:
 168                 dy = -(c->h);
 169                 break;
 170         }
 171
 172         switch (c->grav) {
 173         default:
 174                 break;
 175         case StaticGravity:
 176         case NorthWestGravity:
 177         case WestGravity:
 178         case SouthWestGravity:
 179                 dx = c->border;
 180                 break;
 181         case NorthGravity:
 182         case CenterGravity:
 183         case SouthGravity:
 184                 dx = -(c->w / 2) + c->border;
 185                 break;
 186         case NorthEastGravity:
 187         case EastGravity:
 188         case SouthEastGravity:
 189                 dx = -(c->w + c->border);
 190                 break;
 191         }
 192
 193         if(invert) {
 194                 dx = -dx;
 195                 dy = -dy;
 196         }
 197         c->x += dx;
 198         c->y += dy;
 199 }
 200
 201 void
 202 killclient(Arg *arg)
 203 {
 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 {
 215         Client *c, *tc;
 216         Window trans;
 217         XSetWindowAttributes twa;
 218
 219         c = emallocz(sizeof(Client));
 220         c->tags = emallocz(ntags * sizeof(Bool));
 221         c->win = w;
 222         c->x = c->tx = wa->x;
 223         c->y = c->ty = wa->y;
 224         c->w = c->tw = wa->width;
 225         c->h = wa->height;
 226         c->th = bh;
 227
 228         c->border = 0;
 229         setsize(c);
 230
 231         if(c->x + c->w + 2 > sw)
 232                 c->x = sw - c->w - 2;
 233         if(c->x < 0)
 234                 c->x = 0;
 235         if(c->y + c->h + 2 > sh)
 236                 c->y = sh - c->h - 2;
 237         if(c->h != sh && c->y < bh)
 238                 c->y = bh;
 239
 240         c->proto = getproto(c->win);
 241         XSelectInput(dpy, c->win,
 242                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 243         XGetTransientForHint(dpy, c->win, &trans);
 244         twa.override_redirect = 1;
 245         twa.background_pixmap = ParentRelative;
 246         twa.event_mask = ExposureMask | EnterWindowMask;
 247
 248         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 249                         0, DefaultDepth(dpy, screen), CopyFromParent,
 250                         DefaultVisual(dpy, screen),
 251                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 252
 253         if(clients)
 254                 clients->prev = c;
 255         c->next = clients;
 256         clients = c;
 257
 258         grabbutton(c, Button1, MODKEY);
 259         grabbutton(c, Button2, MODKEY);
 260         grabbutton(c, Button3, MODKEY);
 261
 262         settags(c);
 263         if(!c->isfloat)
 264                 c->isfloat = trans
 265                         || (c->maxw && c->minw &&
 266                                 c->maxw == c->minw && c->maxh == c->minh);
 267         settitle(c);
 268         if(isvisible(c))
 269                 sel = c;
 270         arrange(NULL);
 271         XMapWindow(dpy, c->win);
 272         XMapWindow(dpy, c->title);
 273         if(isvisible(c))
 274                 focus(c);
 275 }
 276
 277 void
 278 resize(Client *c, Bool sizehints, Corner sticky)
 279 {
 280         int bottom = c->y + c->h;
 281         int right = c->x + c->w;
 282         XWindowChanges wc;
 283
 284         if(sizehints) {
 285                 if(c->incw)
 286                         c->w -= (c->w - c->basew) % c->incw;
 287                 if(c->inch)
 288                         c->h -= (c->h - c->baseh) % c->inch;
 289                 if(c->minw && c->w < c->minw)
 290                         c->w = c->minw;
 291                 if(c->minh && c->h < c->minh)
 292                         c->h = c->minh;
 293                 if(c->maxw && c->w > c->maxw)
 294                         c->w = c->maxw;
 295                 if(c->maxh && c->h > c->maxh)
 296                         c->h = c->maxh;
 297         }
 298         if(sticky == TopRight || sticky == BotRight)
 299                 c->x = right - c->w;
 300         if(sticky == BotLeft || sticky == BotRight)
 301                 c->y = bottom - c->h;
 302
 303         resizetitle(c);
 304         wc.x = c->x;
 305         wc.y = c->y;
 306         wc.width = c->w;
 307         wc.height = c->h;
 308         if(c->w == sw && c->h == sh)
 309                 wc.border_width = 0;
 310         else
 311                 wc.border_width = 1;
 312         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 313         XSync(dpy, False);
 314 }
 315
 316 void
 317 setsize(Client *c)
 318 {
 319         long msize;
 320         XSizeHints size;
 321
 322         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 323                 size.flags = PSize;
 324         c->flags = size.flags;
 325         if(c->flags & PBaseSize) {
 326                 c->basew = size.base_width;
 327                 c->baseh = size.base_height;
 328         }
 329         else
 330                 c->basew = c->baseh = 0;
 331         if(c->flags & PResizeInc) {
 332                 c->incw = size.width_inc;
 333                 c->inch = size.height_inc;
 334         }
 335         else
 336                 c->incw = c->inch = 0;
 337         if(c->flags & PMaxSize) {
 338                 c->maxw = size.max_width;
 339                 c->maxh = size.max_height;
 340         }
 341         else
 342                 c->maxw = c->maxh = 0;
 343         if(c->flags & PMinSize) {
 344                 c->minw = size.min_width;
 345                 c->minh = size.min_height;
 346         }
 347         else
 348                 c->minw = c->minh = 0;
 349         if(c->flags & PWinGravity)
 350                 c->grav = size.win_gravity;
 351         else
 352                 c->grav = NorthWestGravity;
 353 }
 354
 355 void
 356 settitle(Client *c)
 357 {
 358         char **list = NULL;
 359         int n;
 360         XTextProperty name;
 361
 362         name.nitems = 0;
 363         c->name[0] = 0;
 364         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 365         if(!name.nitems)
 366                 XGetWMName(dpy, c->win, &name);
 367         if(!name.nitems)
 368                 return;
 369         if(name.encoding == XA_STRING)
 370                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 371         else {
 372                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 373                                 && n > 0 && *list)
 374                 {
 375                         strncpy(c->name, *list, sizeof(c->name));
 376                         XFreeStringList(list);
 377                 }
 378         }
 379         XFree(name.value);
 380         resizetitle(c);
 381 }
 382
 383 void
 384 togglemax(Arg *arg)
 385 {
 386         int ox, oy, ow, oh;
 387         XEvent ev;
 388
 389         if(!sel)
 390                 return;
 391
 392         if((sel->ismax = !sel->ismax)) {
 393                 ox = sel->x;
 394                 oy = sel->y;
 395                 ow = sel->w;
 396                 oh = sel->h;
 397                 sel->x = sx;
 398                 sel->y = sy + bh;
 399                 sel->w = sw - 2;
 400                 sel->h = sh - 2 - bh;
 401
 402                 restack();
 403                 resize(sel, arrange == dofloat, TopLeft);
 404
 405                 sel->x = ox;
 406                 sel->y = oy;
 407                 sel->w = ow;
 408                 sel->h = oh;
 409         }
 410         else
 411                 resize(sel, False, TopLeft);
 412         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 413 }
 414
 415 void
 416 unmanage(Client *c)
 417 {
 418         XGrabServer(dpy);
 419         XSetErrorHandler(xerrordummy);
 420
 421         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 422         XDestroyWindow(dpy, c->title);
 423
 424         if(c->prev)
 425                 c->prev->next = c->next;
 426         if(c->next)
 427                 c->next->prev = c->prev;
 428         if(c == clients)
 429                 clients = c->next;
 430         if(sel == c)
 431                 sel = getnext(clients);
 432         free(c->tags);
 433         free(c);
 434
 435         XSync(dpy, False);
 436         XSetErrorHandler(xerror);
 437         XUngrabServer(dpy);
 438         if(sel)
 439                 focus(sel);
 440         arrange(NULL);
 441 }
 442
 443 void
 444 zoom(Arg *arg)
 445 {
 446         Client *c;
 447
 448         if(!sel || (arrange != dotile) || sel->isfloat || sel->ismax)
 449                 return;
 450
 451         if(sel == getnext(clients))  {
 452                 if((c = getnext(sel->next)))
 453                         sel = c;
 454                 else
 455                         return;
 456         }
 457
 458         /* pop */
 459         sel->prev->next = sel->next;
 460         if(sel->next)
 461                 sel->next->prev = sel->prev;
 462         sel->prev = NULL;
 463         clients->prev = sel;
 464         sel->next = clients;
 465         clients = sel;
 466         focus(sel);
 467         arrange(NULL);
 468 }