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)
  79                 sel = c;
  80         else if(sel != c) {
  81                 if(sel->ismax)
  82                         togglemax(NULL);
  83                 sel = c;
  84                 grabbutton(old, AnyButton, 0);
  85                 drawtitle(old);
  86         }
  87         ungrabbutton(c, AnyButton, 0);
  88         drawtitle(c);
  89         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
  90 }
  91
  92 void
  93 focusnext(Arg *arg)
  94 {
  95         Client *c;
  96
  97         if(!sel)
  98                 return;
  99
 100         if(!(c = getnext(sel->next)))
 101                 c = getnext(clients);
 102         if(c) {
 103                 focus(c);
 104                 restack();
 105         }
 106 }
 107
 108 void
 109 focusprev(Arg *arg)
 110 {
 111         Client *c;
 112
 113         if(!sel)
 114                 return;
 115
 116         if(!(c = getprev(sel->prev))) {
 117                 for(c = clients; c && c->next; c = c->next);
 118                 c = getprev(c);
 119         }
 120         if(c) {
 121                 focus(c);
 122                 restack();
 123         }
 124 }
 125
 126 Client *
 127 getclient(Window w)
 128 {
 129         Client *c;
 130
 131         for(c = clients; c; c = c->next)
 132                 if(c->win == w)
 133                         return c;
 134         return NULL;
 135 }
 136
 137 Client *
 138 getctitle(Window w)
 139 {
 140         Client *c;
 141
 142         for(c = clients; c; c = c->next)
 143                 if(c->title == w)
 144                         return c;
 145         return NULL;
 146 }
 147
 148 void
 149 gravitate(Client *c, Bool invert)
 150 {
 151         int dx = 0, dy = 0;
 152
 153         switch(c->grav) {
 154         default:
 155                 break;
 156         case StaticGravity:
 157         case NorthWestGravity:
 158         case NorthGravity:
 159         case NorthEastGravity:
 160                 dy = c->border;
 161                 break;
 162         case EastGravity:
 163         case CenterGravity:
 164         case WestGravity:
 165                 dy = -(c->h / 2) + c->border;
 166                 break;
 167         case SouthEastGravity:
 168         case SouthGravity:
 169         case SouthWestGravity:
 170                 dy = -(c->h);
 171                 break;
 172         }
 173
 174         switch (c->grav) {
 175         default:
 176                 break;
 177         case StaticGravity:
 178         case NorthWestGravity:
 179         case WestGravity:
 180         case SouthWestGravity:
 181                 dx = c->border;
 182                 break;
 183         case NorthGravity:
 184         case CenterGravity:
 185         case SouthGravity:
 186                 dx = -(c->w / 2) + c->border;
 187                 break;
 188         case NorthEastGravity:
 189         case EastGravity:
 190         case SouthEastGravity:
 191                 dx = -(c->w + c->border);
 192                 break;
 193         }
 194
 195         if(invert) {
 196                 dx = -dx;
 197                 dy = -dy;
 198         }
 199         c->x += dx;
 200         c->y += dy;
 201 }
 202
 203 void
 204 killclient(Arg *arg)
 205 {
 206         if(!sel)
 207                 return;
 208         if(sel->proto & PROTODELWIN)
 209                 sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
 210         else
 211                 XKillClient(dpy, sel->win);
 212 }
 213
 214 void
 215 manage(Window w, XWindowAttributes *wa)
 216 {
 217         unsigned int i;
 218         Client *c, *tc;
 219         Window trans;
 220         XSetWindowAttributes twa;
 221
 222         c = emallocz(sizeof(Client));
 223         c->tags = emallocz(ntags * sizeof(Bool));
 224         c->win = w;
 225         c->x = c->tx = wa->x;
 226         c->y = c->ty = wa->y;
 227         c->w = c->tw = wa->width;
 228         c->h = wa->height;
 229         c->th = bh;
 230
 231         c->border = 0;
 232         setsize(c);
 233
 234         if(c->x + c->w + 2 > sw)
 235                 c->x = sw - c->w - 2;
 236         if(c->x < 0)
 237                 c->x = 0;
 238         if(c->y + c->h + 2 > sh)
 239                 c->y = sh - c->h - 2;
 240         if(c->h != sh && c->y < bh)
 241                 c->y = bh;
 242
 243         c->proto = getproto(c->win);
 244         XSelectInput(dpy, c->win,
 245                 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 246         XGetTransientForHint(dpy, c->win, &trans);
 247         twa.override_redirect = 1;
 248         twa.background_pixmap = ParentRelative;
 249         twa.event_mask = ExposureMask | EnterWindowMask;
 250
 251         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 252                         0, DefaultDepth(dpy, screen), CopyFromParent,
 253                         DefaultVisual(dpy, screen),
 254                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 255
 256         if(clients)
 257                 clients->prev = c;
 258         c->next = clients;
 259         clients = c;
 260
 261         grabbutton(c, Button1, MODKEY);
 262         grabbutton(c, Button2, MODKEY);
 263         grabbutton(c, Button3, MODKEY);
 264
 265         if((tc = getclient(trans))) /* inherit tags */
 266                 for(i = 0; i < ntags; i++)
 267                         c->tags[i] = tc->tags[i];
 268         else
 269                 settags(c);
 270         if(!c->isfloat)
 271                 c->isfloat = trans
 272                         || (c->maxw && c->minw &&
 273                                 c->maxw == c->minw && c->maxh == c->minh);
 274         settitle(c);
 275         if(isvisible(c))
 276                 sel = c;
 277         arrange(NULL);
 278         XMapWindow(dpy, c->win);
 279         XMapWindow(dpy, c->title);
 280         if(isvisible(c))
 281                 focus(c);
 282 }
 283
 284 void
 285 resize(Client *c, Bool sizehints, Corner sticky)
 286 {
 287         int bottom = c->y + c->h;
 288         int right = c->x + c->w;
 289         XWindowChanges wc;
 290
 291         if(sizehints) {
 292                 if(c->incw)
 293                         c->w -= (c->w - c->basew) % c->incw;
 294                 if(c->inch)
 295                         c->h -= (c->h - c->baseh) % c->inch;
 296                 if(c->minw && c->w < c->minw)
 297                         c->w = c->minw;
 298                 if(c->minh && c->h < c->minh)
 299                         c->h = c->minh;
 300                 if(c->maxw && c->w > c->maxw)
 301                         c->w = c->maxw;
 302                 if(c->maxh && c->h > c->maxh)
 303                         c->h = c->maxh;
 304         }
 305         if(sticky == TopRight || sticky == BotRight)
 306                 c->x = right - c->w;
 307         if(sticky == BotLeft || sticky == BotRight)
 308                 c->y = bottom - c->h;
 309
 310         resizetitle(c);
 311         wc.x = c->x;
 312         wc.y = c->y;
 313         wc.width = c->w;
 314         wc.height = c->h;
 315         if(c->w == sw && c->h == sh)
 316                 wc.border_width = 0;
 317         else
 318                 wc.border_width = 1;
 319         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 320         XSync(dpy, False);
 321 }
 322
 323 void
 324 setsize(Client *c)
 325 {
 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 settitle(Client *c)
 364 {
 365         char **list = NULL;
 366         int n;
 367         XTextProperty name;
 368
 369         name.nitems = 0;
 370         c->name[0] = 0;
 371         XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
 372         if(!name.nitems)
 373                 XGetWMName(dpy, c->win, &name);
 374         if(!name.nitems)
 375                 return;
 376         if(name.encoding == XA_STRING)
 377                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 378         else {
 379                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 380                                 && n > 0 && *list)
 381                 {
 382                         strncpy(c->name, *list, sizeof(c->name));
 383                         XFreeStringList(list);
 384                 }
 385         }
 386         XFree(name.value);
 387         resizetitle(c);
 388 }
 389
 390 void
 391 togglemax(Arg *arg)
 392 {
 393         int ox, oy, ow, oh;
 394         XEvent ev;
 395
 396         if(!sel)
 397                 return;
 398
 399         if((sel->ismax = !sel->ismax)) {
 400                 ox = sel->x;
 401                 oy = sel->y;
 402                 ow = sel->w;
 403                 oh = sel->h;
 404                 sel->x = sx;
 405                 sel->y = sy + bh;
 406                 sel->w = sw - 2;
 407                 sel->h = sh - 2 - bh;
 408
 409                 restack();
 410                 resize(sel, arrange == dofloat, TopLeft);
 411
 412                 sel->x = ox;
 413                 sel->y = oy;
 414                 sel->w = ow;
 415                 sel->h = oh;
 416         }
 417         else
 418                 resize(sel, False, TopLeft);
 419         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 420 }
 421
 422 void
 423 unmanage(Client *c)
 424 {
 425         XGrabServer(dpy);
 426         XSetErrorHandler(xerrordummy);
 427
 428         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 429         XDestroyWindow(dpy, c->title);
 430
 431         if(c->prev)
 432                 c->prev->next = c->next;
 433         if(c->next)
 434                 c->next->prev = c->prev;
 435         if(c == clients)
 436                 clients = c->next;
 437         if(sel == c)
 438                 sel = getnext(clients);
 439         free(c->tags);
 440         free(c);
 441
 442         XSync(dpy, False);
 443         XSetErrorHandler(xerror);
 444         XUngrabServer(dpy);
 445         if(sel)
 446                 focus(sel);
 447         arrange(NULL);
 448 }
 449
 450 void
 451 zoom(Arg *arg)
 452 {
 453         Client *c;
 454
 455         if(!sel || (arrange != dotile) || sel->isfloat || sel->ismax)
 456                 return;
 457
 458         if(sel == getnext(clients))  {
 459                 if((c = getnext(sel->next)))
 460                         sel = c;
 461                 else
 462                         return;
 463         }
 464
 465         /* pop */
 466         sel->prev->next = sel->next;
 467         if(sel->next)
 468                 sel->next->prev = sel->prev;
 469         sel->prev = NULL;
 470         clients->prev = sel;
 471         sel->next = clients;
 472         clients = sel;
 473         focus(sel);
 474         arrange(NULL);
 475 }