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