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 floating(void);
  15 static void tiling(void);
  16 static void (*arrange)(void) = floating;
  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         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 105         focus(c);
 106 }
 107
 108 void
 109 ckill(void *aux)
 110 {
 111         Client *c = stack;
 112
 113         if(!c)
 114                 return;
 115         if(c->proto & WM_PROTOCOL_DELWIN)
 116                 send_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
 117         else
 118                 XKillClient(dpy, c->win);
 119 }
 120
 121 static void
 122 resize_title(Client *c)
 123 {
 124         int i;
 125
 126         c->tw = 0;
 127         for(i = 0; i < TLast; i++)
 128                 if(c->tags[i])
 129                         c->tw += textw(c->tags[i]) + dc.font.height;
 130         c->tw += textw(c->name) + dc.font.height;
 131         if(c->tw > c->w)
 132                 c->tw = c->w + 2;
 133         c->tx = c->x + c->w - c->tw + 2;
 134         c->ty = c->y;
 135         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
 136 }
 137
 138 void
 139 update_name(Client *c)
 140 {
 141         XTextProperty name;
 142         int n;
 143         char **list = NULL;
 144
 145         name.nitems = 0;
 146         c->name[0] = 0;
 147         XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
 148         if(!name.nitems)
 149                 XGetWMName(dpy, c->win, &name);
 150         if(!name.nitems)
 151                 return;
 152         if(name.encoding == XA_STRING)
 153                 strncpy(c->name, (char *)name.value, sizeof(c->name));
 154         else {
 155                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 156                                 && n > 0 && *list)
 157                 {
 158                         strncpy(c->name, *list, sizeof(c->name));
 159                         XFreeStringList(list);
 160                 }
 161         }
 162         XFree(name.value);
 163         resize_title(c);
 164 }
 165
 166 void
 167 update_size(Client *c)
 168 {
 169         XSizeHints size;
 170         long msize;
 171         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
 172                 size.flags = PSize;
 173         c->flags = size.flags;
 174         if(c->flags & PBaseSize) {
 175                 c->basew = size.base_width;
 176                 c->baseh = size.base_height;
 177         }
 178         else
 179                 c->basew = c->baseh = 0;
 180         if(c->flags & PResizeInc) {
 181                 c->incw = size.width_inc;
 182                 c->inch = size.height_inc;
 183         }
 184         else
 185                 c->incw = c->inch = 0;
 186         if(c->flags & PMaxSize) {
 187                 c->maxw = size.max_width;
 188                 c->maxh = size.max_height;
 189         }
 190         else
 191                 c->maxw = c->maxh = 0;
 192         if(c->flags & PMinSize) {
 193                 c->minw = size.min_width;
 194                 c->minh = size.min_height;
 195         }
 196         else
 197                 c->minw = c->minh = 0;
 198         if(c->flags & PWinGravity)
 199                 c->grav = size.win_gravity;
 200         else
 201                 c->grav = NorthWestGravity;
 202 }
 203
 204 void
 205 craise(Client *c)
 206 {
 207         XRaiseWindow(dpy, c->win);
 208         XRaiseWindow(dpy, c->title);
 209 }
 210
 211 void
 212 lower(Client *c)
 213 {
 214         XLowerWindow(dpy, c->title);
 215         XLowerWindow(dpy, c->win);
 216 }
 217
 218 void
 219 focus(Client *c)
 220 {
 221         Client **l, *old;
 222
 223         old = stack;
 224         for(l = &stack; *l && *l != c; l = &(*l)->snext);
 225         if(*l)
 226                 *l = c->snext;
 227         c->snext = stack;
 228         stack = c;
 229         if(old && old != c) {
 230                 XSetWindowBorder(dpy, old->win, dc.bg);
 231                 XMapWindow(dpy, old->title);
 232                 draw_client(old);
 233         }
 234         XUnmapWindow(dpy, c->title);
 235         XSetWindowBorder(dpy, c->win, dc.fg);
 236         draw_client(c);
 237         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 238         XFlush(dpy);
 239         discard_events(EnterWindowMask);
 240 }
 241
 242 void
 243 manage(Window w, XWindowAttributes *wa)
 244 {
 245         Client *c, **l;
 246         XSetWindowAttributes twa;
 247
 248         c = emallocz(sizeof(Client));
 249         c->win = w;
 250         c->tx = c->x = wa->x;
 251         c->ty = c->y = wa->y;
 252         c->tw = c->w = wa->width;
 253         c->h = wa->height;
 254         c->th = th;
 255         c->border = 1;
 256         update_size(c);
 257         XSelectInput(dpy, c->win,
 258                         StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
 259         XGetTransientForHint(dpy, c->win, &c->trans);
 260         twa.override_redirect = 1;
 261         twa.background_pixmap = ParentRelative;
 262         twa.event_mask = ExposureMask;
 263
 264         c->tags[tsel] = tags[tsel];
 265         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 266                         0, DefaultDepth(dpy, screen), CopyFromParent,
 267                         DefaultVisual(dpy, screen),
 268                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 269
 270         update_name(c);
 271         for(l=&clients; *l; l=&(*l)->next);
 272         c->next = *l; /* *l == nil */
 273         *l = c;
 274         XSetWindowBorderWidth(dpy, c->win, 1);
 275         XMapRaised(dpy, c->win);
 276         XMapRaised(dpy, c->title);
 277         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
 278                         GrabModeAsync, GrabModeSync, None, None);
 279         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
 280                         GrabModeAsync, GrabModeSync, None, None);
 281         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
 282                         GrabModeAsync, GrabModeSync, None, None);
 283         arrange();
 284         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 285         focus(c);
 286 }
 287
 288 void
 289 gravitate(Client *c, Bool invert)
 290 {
 291         int dx = 0, dy = 0;
 292
 293         switch(c->grav) {
 294         case StaticGravity:
 295         case NorthWestGravity:
 296         case NorthGravity:
 297         case NorthEastGravity:
 298                 dy = c->border;
 299                 break;
 300         case EastGravity:
 301         case CenterGravity:
 302         case WestGravity:
 303                 dy = -(c->h / 2) + c->border;
 304                 break;
 305         case SouthEastGravity:
 306         case SouthGravity:
 307         case SouthWestGravity:
 308                 dy = -c->h;
 309                 break;
 310         default:
 311                 break;
 312         }
 313
 314         switch (c->grav) {
 315         case StaticGravity:
 316         case NorthWestGravity:
 317         case WestGravity:
 318         case SouthWestGravity:
 319                 dx = c->border;
 320                 break;
 321         case NorthGravity:
 322         case CenterGravity:
 323         case SouthGravity:
 324                 dx = -(c->w / 2) + c->border;
 325                 break;
 326         case NorthEastGravity:
 327         case EastGravity:
 328         case SouthEastGravity:
 329                 dx = -(c->w + c->border);
 330                 break;
 331         default:
 332                 break;
 333         }
 334
 335         if(invert) {
 336                 dx = -dx;
 337                 dy = -dy;
 338         }
 339         c->x += dx;
 340         c->y += dy;
 341 }
 342
 343
 344 void
 345 resize(Client *c)
 346 {
 347         XConfigureEvent e;
 348
 349         if(c->incw)
 350                 c->w -= (c->w - c->basew) % c->incw;
 351         if(c->inch)
 352                 c->h -= (c->h - c->baseh) % c->inch;
 353         if(c->minw && c->w < c->minw)
 354                 c->w = c->minw;
 355         if(c->minh && c->h < c->minh)
 356                 c->h = c->minh;
 357         if(c->maxw && c->w > c->maxw)
 358                 c->w = c->maxw;
 359         if(c->maxh && c->h > c->maxh)
 360                 c->h = c->maxh;
 361         resize_title(c);
 362         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 363         e.type = ConfigureNotify;
 364         e.event = c->win;
 365         e.window = c->win;
 366         e.x = c->x;
 367         e.y = c->y;
 368         e.width = c->w;
 369         e.height = c->h;
 370         e.border_width = c->border;
 371         e.above = None;
 372         e.override_redirect = False;
 373         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
 374         XFlush(dpy);
 375 }
 376
 377 static int
 378 dummy_error_handler(Display *dsply, XErrorEvent *err)
 379 {
 380         return 0;
 381 }
 382
 383 void
 384 unmanage(Client *c)
 385 {
 386         Client **l;
 387
 388         XGrabServer(dpy);
 389         XSetErrorHandler(dummy_error_handler);
 390
 391         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 392         XDestroyWindow(dpy, c->title);
 393
 394         for(l=&clients; *l && *l != c; l=&(*l)->next);
 395         *l = c->next;
 396         for(l=&stack; *l && *l != c; l=&(*l)->snext);
 397         *l = c->snext;
 398         free(c);
 399
 400         XFlush(dpy);
 401         XSetErrorHandler(error_handler);
 402         XUngrabServer(dpy);
 403         arrange();
 404         if(stack)
 405                 focus(stack);
 406 }
 407
 408 Client *
 409 gettitle(Window w)
 410 {
 411         Client *c;
 412         for(c = clients; c; c = c->next)
 413                 if(c->title == w)
 414                         return c;
 415         return NULL;
 416 }
 417
 418 Client *
 419 getclient(Window w)
 420 {
 421         Client *c;
 422         for(c = clients; c; c = c->next)
 423                 if(c->win == w)
 424                         return c;
 425         return NULL;
 426 }
 427
 428 void
 429 draw_client(Client *c)
 430 {
 431         int i;
 432         if(c == stack)
 433                 return;
 434
 435         dc.x = dc.y = 0;
 436         dc.h = c->th;
 437
 438         dc.w = 0;
 439         for(i = 0; i < TLast; i++) {
 440                 if(c->tags[i]) {
 441                         dc.x += dc.w;
 442                         dc.w = textw(c->tags[i]) + dc.font.height;
 443                         draw(True, c->tags[i]);
 444                 }
 445         }
 446         dc.x += dc.w;
 447         dc.w = textw(c->name) + dc.font.height;
 448         draw(True, c->name);
 449         XCopyArea(dpy, dc.drawable, c->title, dc.gc,
 450                         0, 0, c->tw, c->th, 0, 0);
 451         XFlush(dpy);
 452 }