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