client.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5
   6 #include <math.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xutil.h>
  11
  12 #include "dwm.h"
  13
  14 static void (*arrange)(Arg *) = floating;
  15
  16 static Client *
  17 next(Client *c)
  18 {
  19         for(c = c->next; c && !c->tags[tsel]; c = c->next);
  20         return c;
  21 }
  22
  23 static Client *
  24 prev(Client *c)
  25 {
  26         for(c = c->prev; c && !c->tags[tsel]; c = c->prev);
  27         return c;
  28 }
  29
  30 void
  31 max(Arg *arg)
  32 {
  33         if(!csel)
  34                 return;
  35         csel->x = sx;
  36         csel->y = sy;
  37         csel->w = sw - 2 * csel->border;
  38         csel->h = sh - 2 * csel->border;
  39         craise(csel);
  40         resize(csel);
  41         discard_events(EnterWindowMask);
  42 }
  43
  44 void
  45 tag(Arg *arg)
  46 {
  47         if(!csel)
  48                 return;
  49
  50         if(arg->i == tsel)
  51                 return;
  52
  53         if(csel->tags[arg->i])
  54                 csel->tags[arg->i] = NULL; /* toggle tag */
  55         else
  56                 csel->tags[arg->i] = tags[arg->i];
  57         arrange(NULL);
  58 }
  59
  60 void
  61 floating(Arg *arg)
  62 {
  63         Client *c;
  64
  65         arrange = floating;
  66         if(!csel)
  67                 return;
  68         for(c = csel; c; c = next(c))
  69                 resize(c);
  70         discard_events(EnterWindowMask);
  71 }
  72
  73 void
  74 tiling(Arg *arg)
  75 {
  76         Client *c;
  77         int n, cols, rows, gw, gh, i, j;
  78     float rt, fd;
  79
  80         arrange = tiling;
  81         if(!csel)
  82                 return;
  83         for(n = 0, c = csel; c; c = next(c), n++);
  84         rt = sqrt(n);
  85         if(modff(rt, &fd) < 0.5)
  86                 rows = floor(rt);
  87         else
  88                 rows = ceil(rt);
  89         if(rows * rows < n)
  90                 cols = rows + 1;
  91         else
  92                 cols = rows;
  93
  94         gw = (sw - 2)  / cols;
  95         gh = (sh - 2) / rows;
  96
  97         for(i = j = 0, c = csel; c; c = next(c)) {
  98                 c->x = i * gw;
  99                 c->y = j * gh;
 100                 c->w = gw;
 101                 c->h = gh;
 102                 resize(c);
 103                 if(++i == cols) {
 104                         j++;
 105                         i = 0;
 106                 }
 107         }
 108         discard_events(EnterWindowMask);
 109 }
 110
 111 void
 112 prevc(Arg *arg)
 113 {
 114         Client *c;
 115
 116         if(!csel)
 117                 return;
 118
 119         if(!(c = prev(csel)))
 120                 c = prev(cend);
 121         if(c) {
 122                 craise(c);
 123                 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 124                 focus(c);
 125         }
 126 }
 127
 128 void
 129 nextc(Arg *arg)
 130 {
 131         Client *c;
 132
 133         if(!csel)
 134                 return;
 135
 136         if(!(c = next(csel)))
 137                 c = next(cstart);
 138
 139         if(c) {
 140                 craise(c);
 141                 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 142                 focus(c);
 143         }
 144 }
 145
 146 void
 147 ckill(Arg *arg)
 148 {
 149         Client *c = csel;
 150
 151         if(!c)
 152                 return;
 153         if(c->proto & WM_PROTOCOL_DELWIN)
 154                 send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
 155         else
 156                 XKillClient(dpy, c->win);
 157 }
 158
 159 static void
 160 resize_title(Client *c)
 161 {
 162         int i;
 163
 164         c->tw = 0;
 165         for(i = 0; i < TLast; i++)
 166                 if(c->tags[i])
 167                         c->tw += textw(c->tags[i]) + dc.font.height;
 168         c->tw += textw(c->name) + dc.font.height;
 169         if(c->tw > c->w)
 170                 c->tw = c->w + 2;
 171         c->tx = c->x + c->w - c->tw + 2;
 172         c->ty = c->y;
 173         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
 174 }
 175
 176 void
 177 update_name(Client *c)
 178 {
 179         XTextProperty name;
 180         int n;
 181         char **list = NULL;
 182
 183         name.nitems = 0;
 184         c->name[0] = 0;
 185         XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
 186         if(!name.nitems)
 187                 XGetWMName(dpy, c->win, &name);
 188         if(!name.nitems)
 189                 return;
 190         if(name.encoding == XA_STRING)
 191                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 192         else {
 193                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 194                                 && n > 0 && *list)
 195                 {
 196                         strncpy(c->name, *list, sizeof(c->name));
 197                         XFreeStringList(list);
 198                 }
 199         }
 200         XFree(name.value);
 201         resize_title(c);
 202 }
 203
 204 void
 205 update_size(Client *c)
 206 {
 207         XSizeHints size;
 208         long msize;
 209         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 210                 size.flags = PSize;
 211         c->flags = size.flags;
 212         if(c->flags & PBaseSize) {
 213                 c->basew = size.base_width;
 214                 c->baseh = size.base_height;
 215         }
 216         else
 217                 c->basew = c->baseh = 0;
 218         if(c->flags & PResizeInc) {
 219                 c->incw = size.width_inc;
 220                 c->inch = size.height_inc;
 221         }
 222         else
 223                 c->incw = c->inch = 0;
 224         if(c->flags & PMaxSize) {
 225                 c->maxw = size.max_width;
 226                 c->maxh = size.max_height;
 227         }
 228         else
 229                 c->maxw = c->maxh = 0;
 230         if(c->flags & PMinSize) {
 231                 c->minw = size.min_width;
 232                 c->minh = size.min_height;
 233         }
 234         else
 235                 c->minw = c->minh = 0;
 236         if(c->flags & PWinGravity)
 237                 c->grav = size.win_gravity;
 238         else
 239                 c->grav = NorthWestGravity;
 240 }
 241
 242 void
 243 craise(Client *c)
 244 {
 245         XRaiseWindow(dpy, c->win);
 246         XRaiseWindow(dpy, c->title);
 247 }
 248
 249 void
 250 lower(Client *c)
 251 {
 252         XLowerWindow(dpy, c->title);
 253         XLowerWindow(dpy, c->win);
 254 }
 255
 256 void
 257 focus(Client *c)
 258 {
 259         if(csel && csel != c) {
 260                 XSetWindowBorder(dpy, csel->win, dc.bg);
 261                 XMapWindow(dpy, csel->title);
 262                 draw_client(csel);
 263         }
 264         csel = c;
 265         XUnmapWindow(dpy, c->title);
 266         XSetWindowBorder(dpy, c->win, dc.fg);
 267         draw_client(c);
 268         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 269         XFlush(dpy);
 270         discard_events(EnterWindowMask);
 271 }
 272
 273 void
 274 manage(Window w, XWindowAttributes *wa)
 275 {
 276         Client *c;
 277         XSetWindowAttributes twa;
 278
 279         c = emallocz(sizeof(Client));
 280         c->win = w;
 281         c->tx = c->x = wa->x;
 282         c->ty = c->y = wa->y;
 283         c->tw = c->w = wa->width;
 284         c->h = wa->height;
 285         c->th = th;
 286         c->border = 1;
 287         update_size(c);
 288         XSelectInput(dpy, c->win,
 289                         StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 290         XGetTransientForHint(dpy, c->win, &c->trans);
 291         twa.override_redirect = 1;
 292         twa.background_pixmap = ParentRelative;
 293         twa.event_mask = ExposureMask;
 294
 295         c->tags[tsel] = tags[tsel];
 296         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 297                         0, DefaultDepth(dpy, screen), CopyFromParent,
 298                         DefaultVisual(dpy, screen),
 299                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 300
 301         update_name(c);
 302
 303         if(!cstart)
 304                 cstart = cend = c;
 305         else {
 306                 cend->next = c;
 307                 c->prev = cend;
 308                 cend = c;
 309         }
 310
 311         XSetWindowBorderWidth(dpy, c->win, 1);
 312         XMapRaised(dpy, c->win);
 313         XMapRaised(dpy, c->title);
 314         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
 315                         GrabModeAsync, GrabModeSync, None, None);
 316         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
 317                         GrabModeAsync, GrabModeSync, None, None);
 318         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
 319                         GrabModeAsync, GrabModeSync, None, None);
 320         arrange(NULL);
 321         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 322         focus(c);
 323 }
 324
 325 void
 326 gravitate(Client *c, Bool invert)
 327 {
 328         int dx = 0, dy = 0;
 329
 330         switch(c->grav) {
 331         case StaticGravity:
 332         case NorthWestGravity:
 333         case NorthGravity:
 334         case NorthEastGravity:
 335                 dy = c->border;
 336                 break;
 337         case EastGravity:
 338         case CenterGravity:
 339         case WestGravity:
 340                 dy = -(c->h / 2) + c->border;
 341                 break;
 342         case SouthEastGravity:
 343         case SouthGravity:
 344         case SouthWestGravity:
 345                 dy = -c->h;
 346                 break;
 347         default:
 348                 break;
 349         }
 350
 351         switch (c->grav) {
 352         case StaticGravity:
 353         case NorthWestGravity:
 354         case WestGravity:
 355         case SouthWestGravity:
 356                 dx = c->border;
 357                 break;
 358         case NorthGravity:
 359         case CenterGravity:
 360         case SouthGravity:
 361                 dx = -(c->w / 2) + c->border;
 362                 break;
 363         case NorthEastGravity:
 364         case EastGravity:
 365         case SouthEastGravity:
 366                 dx = -(c->w + c->border);
 367                 break;
 368         default:
 369                 break;
 370         }
 371
 372         if(invert) {
 373                 dx = -dx;
 374                 dy = -dy;
 375         }
 376         c->x += dx;
 377         c->y += dy;
 378 }
 379
 380
 381 void
 382 resize(Client *c)
 383 {
 384         XConfigureEvent e;
 385
 386         if(c->incw)
 387                 c->w -= (c->w - c->basew) % c->incw;
 388         if(c->inch)
 389                 c->h -= (c->h - c->baseh) % c->inch;
 390         if(c->minw && c->w < c->minw)
 391                 c->w = c->minw;
 392         if(c->minh && c->h < c->minh)
 393                 c->h = c->minh;
 394         if(c->maxw && c->w > c->maxw)
 395                 c->w = c->maxw;
 396         if(c->maxh && c->h > c->maxh)
 397                 c->h = c->maxh;
 398         resize_title(c);
 399         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 400         e.type = ConfigureNotify;
 401         e.event = c->win;
 402         e.window = c->win;
 403         e.x = c->x;
 404         e.y = c->y;
 405         e.width = c->w;
 406         e.height = c->h;
 407         e.border_width = c->border;
 408         e.above = None;
 409         e.override_redirect = False;
 410         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
 411         XFlush(dpy);
 412 }
 413
 414 static int
 415 dummy_error_handler(Display *dsply, XErrorEvent *err)
 416 {
 417         return 0;
 418 }
 419
 420 void
 421 unmanage(Client *c)
 422 {
 423         XGrabServer(dpy);
 424         XSetErrorHandler(dummy_error_handler);
 425
 426         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 427         XDestroyWindow(dpy, c->title);
 428
 429         if(c->prev) {
 430                 c->prev->next = c->next;
 431                 if(csel == c)
 432                         csel = c->prev;
 433         }
 434         if(c->next) {
 435                 c->next->prev = c->prev;
 436                 if(csel == c)
 437                         csel = c->next;
 438         }
 439         if(cstart == c)
 440                 cstart = c->next;
 441         if(cend == c)
 442                 cend = c->prev;
 443
 444         free(c);
 445
 446         XFlush(dpy);
 447         XSetErrorHandler(error_handler);
 448         XUngrabServer(dpy);
 449         arrange(NULL);
 450         if(csel)
 451                 focus(csel);
 452 }
 453
 454 Client *
 455 gettitle(Window w)
 456 {
 457         Client *c;
 458         for(c = cstart; c; c = c->next)
 459                 if(c->title == w)
 460                         return c;
 461         return NULL;
 462 }
 463
 464 Client *
 465 getclient(Window w)
 466 {
 467         Client *c;
 468         for(c = cstart; c; c = c->next)
 469                 if(c->win == w)
 470                         return c;
 471         return NULL;
 472 }
 473
 474 void
 475 draw_client(Client *c)
 476 {
 477         int i;
 478         if(c == csel)
 479                 return;
 480
 481         dc.x = dc.y = 0;
 482         dc.h = c->th;
 483
 484         dc.w = 0;
 485         for(i = 0; i < TLast; i++) {
 486                 if(c->tags[i]) {
 487                         dc.x += dc.w;
 488                         dc.w = textw(c->tags[i]) + dc.font.height;
 489                         draw(True, c->tags[i]);
 490                 }
 491         }
 492         dc.x += dc.w;
 493         dc.w = textw(c->name) + dc.font.height;
 494         draw(True, c->name);
 495         XCopyArea(dpy, dc.drawable, c->title, dc.gc,
 496                         0, 0, c->tw, c->th, 0, 0);
 497         XFlush(dpy);
 498 }