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