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