ewmh.c

   1 /*
   2  * ewmh.c - EWMH support functions
   3  *
   4  * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <X11/Xatom.h>
  23 #include <X11/Xmd.h>
  24
  25 #include "ewmh.h"
  26 #include "tag.h"
  27 #include "focus.h"
  28 #include "screen.h"
  29 #include "client.h"
  30 #include "widget.h"
  31
  32 extern AwesomeConf globalconf;
  33
  34 static Atom net_supported;
  35 static Atom net_client_list;
  36 static Atom net_number_of_desktops;
  37 static Atom net_current_desktop;
  38 static Atom net_desktop_names;
  39 static Atom net_active_window;
  40
  41 static Atom net_close_window;
  42
  43 static Atom net_wm_name;
  44 static Atom net_wm_icon_name;
  45 static Atom net_wm_window_type;
  46 static Atom net_wm_window_type_normal;
  47 static Atom net_wm_window_type_dock;
  48 static Atom net_wm_window_type_splash;
  49 static Atom net_wm_window_type_dialog;
  50 static Atom net_wm_icon;
  51 static Atom net_wm_state;
  52 static Atom net_wm_state_sticky;
  53 static Atom net_wm_state_skip_taskbar;
  54 static Atom net_wm_state_fullscreen;
  55
  56 static Atom utf8_string;
  57
  58 typedef struct
  59 {
  60     const char *name;
  61     Atom *atom;
  62 } AtomItem;
  63
  64 static AtomItem AtomNames[] =
  65 {
  66     { "_NET_SUPPORTED", &net_supported },
  67     { "_NET_CLIENT_LIST", &net_client_list },
  68     { "_NET_NUMBER_OF_DESKTOPS", &net_number_of_desktops },
  69     { "_NET_CURRENT_DESKTOP", &net_current_desktop },
  70     { "_NET_DESKTOP_NAMES", &net_desktop_names },
  71     { "_NET_ACTIVE_WINDOW", &net_active_window },
  72
  73     { "_NET_CLOSE_WINDOW", &net_close_window },
  74
  75     { "_NET_WM_NAME", &net_wm_name },
  76     { "_NET_WM_ICON_NAME", &net_wm_icon_name },
  77     { "_NET_WM_WINDOW_TYPE", &net_wm_window_type },
  78     { "_NET_WM_WINDOW_TYPE_NORMAL", &net_wm_window_type_normal },
  79     { "_NET_WM_WINDOW_TYPE_DOCK", &net_wm_window_type_dock },
  80     { "_NET_WM_WINDOW_TYPE_SPLASH", &net_wm_window_type_splash },
  81     { "_NET_WM_WINDOW_TYPE_DIALOG", &net_wm_window_type_dialog },
  82     { "_NET_WM_ICON", &net_wm_icon },
  83     { "_NET_WM_STATE", &net_wm_state },
  84     { "_NET_WM_STATE_STICKY", &net_wm_state_sticky },
  85     { "_NET_WM_STATE_SKIP_TASKBAR", &net_wm_state_skip_taskbar },
  86     { "_NET_WM_STATE_FULLSCREEN", &net_wm_state_fullscreen },
  87
  88     { "UTF8_STRING", &utf8_string },
  89 };
  90
  91 #define ATOM_NUMBER (sizeof(AtomNames)/sizeof(AtomItem))
  92
  93 #define _NET_WM_STATE_REMOVE 0
  94 #define _NET_WM_STATE_ADD 1
  95 #define _NET_WM_STATE_TOGGLE 2
  96
  97 void
  98 ewmh_init_atoms(void)
  99 {
 100     unsigned int i;
 101     char *names[ATOM_NUMBER];
 102     Atom atoms[ATOM_NUMBER];
 103
 104     for(i = 0; i < ATOM_NUMBER; i++)
 105         names[i] = (char *) AtomNames[i].name;
 106     XInternAtoms(globalconf.display, names, ATOM_NUMBER, False, atoms);
 107     for(i = 0; i < ATOM_NUMBER; i++)
 108         *AtomNames[i].atom = atoms[i];
 109 }
 110
 111 void
 112 ewmh_set_supported_hints(int phys_screen)
 113 {
 114     Atom atom[ATOM_NUMBER];
 115     int i = 0;
 116
 117     atom[i++] = net_supported;
 118     atom[i++] = net_client_list;
 119     atom[i++] = net_number_of_desktops;
 120     atom[i++] = net_current_desktop;
 121     atom[i++] = net_desktop_names;
 122     atom[i++] = net_active_window;
 123
 124     atom[i++] = net_close_window;
 125
 126     atom[i++] = net_wm_name;
 127     atom[i++] = net_wm_icon_name;
 128     atom[i++] = net_wm_window_type;
 129     atom[i++] = net_wm_window_type_normal;
 130     atom[i++] = net_wm_window_type_dock;
 131     atom[i++] = net_wm_window_type_splash;
 132     atom[i++] = net_wm_window_type_dialog;
 133     atom[i++] = net_wm_icon;
 134     atom[i++] = net_wm_state;
 135     atom[i++] = net_wm_state_sticky;
 136     atom[i++] = net_wm_state_skip_taskbar;
 137     atom[i++] = net_wm_state_fullscreen;
 138
 139     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 140                     net_supported, XA_ATOM, 32,
 141                     PropModeReplace, (unsigned char *) atom, i);
 142 }
 143
 144 void
 145 ewmh_update_net_client_list(int phys_screen)
 146 {
 147     Window *wins;
 148     Client *c;
 149     int n = 0;
 150
 151     for(c = globalconf.clients; c; c = c->next)
 152         if(get_phys_screen(c->screen) == phys_screen)
 153             n++;
 154
 155     wins = p_new(Window, n + 1);
 156
 157     for(n = 0, c = globalconf.clients; c; c = c->next, n++)
 158         if(get_phys_screen(c->screen) == phys_screen)
 159             wins[n] = c->win;
 160
 161     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 162                     net_client_list, XA_WINDOW, 32, PropModeReplace, (unsigned char *) wins, n);
 163
 164     p_delete(&wins);
 165     XFlush(globalconf.display);
 166 }
 167
 168 void
 169 ewmh_update_net_numbers_of_desktop(int phys_screen)
 170 {
 171     CARD32 count = 0;
 172     Tag *tag;
 173
 174     for(tag = globalconf.screens[phys_screen].tags; tag; tag = tag->next)
 175         count++;
 176
 177     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 178                     net_number_of_desktops, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &count, 1);
 179 }
 180
 181 void
 182 ewmh_update_net_current_desktop(int phys_screen)
 183 {
 184     CARD32 count = 0;
 185     Tag *tag, **curtags = tags_get_current(phys_screen);
 186
 187     for(tag = globalconf.screens[phys_screen].tags; tag != curtags[0]; tag = tag->next)
 188         count++;
 189
 190     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 191                     net_current_desktop, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &count, 1);
 192
 193     p_delete(&curtags);
 194 }
 195
 196 void
 197 ewmh_update_net_desktop_names(int phys_screen)
 198 {
 199     char buf[1024], *pos;
 200     ssize_t len, curr_size;
 201     Tag *tag;
 202
 203     pos = buf;
 204     len = 0;
 205     for(tag = globalconf.screens[phys_screen].tags; tag; tag = tag->next)
 206     {
 207         curr_size = a_strlen(tag->name);
 208         a_strcpy(pos, sizeof(buf), tag->name);
 209         pos += curr_size + 1;
 210         len += curr_size + 1;
 211     }
 212
 213     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 214                     net_desktop_names, utf8_string, 8, PropModeReplace, (unsigned char *) buf, len);
 215 }
 216
 217 void
 218 ewmh_update_net_active_window(int phys_screen)
 219 {
 220     Window win;
 221     Client *sel = focus_get_current_client(phys_screen);
 222
 223     win = sel ? sel->win : None;
 224
 225     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 226                     net_active_window, XA_WINDOW, 32,  PropModeReplace, (unsigned char *) &win, 1);
 227 }
 228
 229 static void
 230 ewmh_process_state_atom(Client *c, Atom state, int set)
 231 {
 232     if(state == net_wm_state_sticky)
 233     {
 234         Tag *tag;
 235         for(tag = globalconf.screens[c->screen].tags; tag; tag = tag->next)
 236             tag_client(c, tag);
 237     }
 238     else if(state == net_wm_state_skip_taskbar)
 239     {
 240         if(set == _NET_WM_STATE_REMOVE)
 241         {
 242             c->skiptb = False;
 243             c->border = c->oldborder;
 244         }
 245         else if(set == _NET_WM_STATE_ADD)
 246         {
 247             c->skiptb = True;
 248             c->oldborder = c->border;
 249             c->border = 0;
 250         }
 251     }
 252     else if(state == net_wm_state_fullscreen)
 253     {
 254         Area geometry = c->geometry;
 255         if(set == _NET_WM_STATE_REMOVE)
 256         {
 257             /* restore geometry */
 258             geometry = c->m_geometry;
 259             c->border = c->oldborder;
 260             c->ismax = False;
 261             client_setfloating(c, c->wasfloating);
 262         }
 263         else if(set == _NET_WM_STATE_ADD)
 264         {
 265             geometry = screen_get_area(c->screen, NULL, &globalconf.screens[c->screen].padding);
 266             /* save geometry */
 267             c->m_geometry = c->geometry;
 268             c->wasfloating = c->isfloating;
 269             c->oldborder = c->border;
 270             c->border = 0;
 271             c->ismax = True;
 272             client_setfloating(c, True);
 273         }
 274         widget_invalidate_cache(c->screen, WIDGET_CACHE_CLIENTS);
 275         client_resize(c, geometry, False);
 276         XRaiseWindow(globalconf.display, c->win);
 277     }
 278 }
 279
 280 static void
 281 ewmh_process_window_type_atom(Client *c, Atom state)
 282 {
 283     if(state == net_wm_window_type_normal)
 284     {
 285         /* do nothing. this is REALLY IMPORTANT */
 286     }
 287     else if(state == net_wm_window_type_dock
 288             || state == net_wm_window_type_splash)
 289     {
 290         c->border = 0;
 291         c->skip = True;
 292         c->isfixed = True;
 293         client_setfloating(c, True);
 294     }
 295     else if (state == net_wm_window_type_dialog)
 296         client_setfloating(c, True);
 297 }
 298 void
 299 ewmh_process_client_message(XClientMessageEvent *ev)
 300 {
 301     Client *c;
 302     int screen;
 303
 304     if(ev->message_type == net_current_desktop)
 305         for(screen = 0; screen < ScreenCount(globalconf.display); screen++)
 306             if(ev->window == RootWindow(globalconf.display, screen))
 307                 tag_view_only_byindex(screen, ev->data.l[0]);
 308
 309     if(ev->message_type == net_close_window)
 310     {
 311         if((c = client_get_bywin(globalconf.clients, ev->window)))
 312            client_kill(c);
 313     }
 314     else if(ev->message_type == net_wm_state)
 315     {
 316         if((c = client_get_bywin(globalconf.clients, ev->window)))
 317         {
 318             ewmh_process_state_atom(c, (Atom) ev->data.l[1], ev->data.l[0]);
 319             if(ev->data.l[2])
 320                 ewmh_process_state_atom(c, (Atom) ev->data.l[2], ev->data.l[0]);
 321         }
 322     }
 323 }
 324
 325 void
 326 ewmh_check_client_hints(Client *c)
 327 {
 328     int format;
 329     Atom real, *state;
 330     unsigned char *data = NULL;
 331     unsigned long i, n, extra;
 332
 333     if(XGetWindowProperty(globalconf.display, c->win, net_wm_state, 0L, LONG_MAX, False,
 334                           XA_ATOM, &real, &format, &n, &extra,
 335                           (unsigned char **) &data) == Success && data)
 336     {
 337         state = (Atom *) data;
 338         for(i = 0; i < n; i++)
 339             ewmh_process_state_atom(c, state[i], _NET_WM_STATE_ADD);
 340
 341         XFree(data);
 342     }
 343
 344     if(XGetWindowProperty(globalconf.display, c->win, net_wm_window_type, 0L, LONG_MAX, False,
 345                           XA_ATOM, &real, &format, &n, &extra,
 346                           (unsigned char **) &data) == Success && data)
 347     {
 348         state = (Atom *) data;
 349         for(i = 0; i < n; i++)
 350             ewmh_process_window_type_atom(c, state[i]);
 351
 352         XFree(data);
 353     }
 354 }
 355
 356 NetWMIcon *
 357 ewmh_get_window_icon(Window w)
 358 {
 359     NetWMIcon *icon;
 360     Atom type;
 361     int format, size, i;
 362     unsigned long items, rest, *data, pixel;
 363     unsigned char *imgdata, *wdata;
 364
 365     if(XGetWindowProperty(globalconf.display, w,
 366                           net_wm_icon, 0L, LONG_MAX, False, XA_CARDINAL, &type, &format,
 367                           &items, &rest, &wdata) != Success
 368        || !wdata)
 369         return NULL;
 370
 371     if(type != XA_CARDINAL || format != 32 || items < 2)
 372     {
 373         XFree(wdata);
 374         return NULL;
 375     }
 376
 377     icon = p_new(NetWMIcon, 1);
 378
 379     data = (unsigned long *) wdata;
 380
 381     icon->width = data[0];
 382     icon->height = data[1];
 383     size = icon->width * icon->height;
 384
 385     if(!size)
 386     {
 387         p_delete(&icon);
 388         XFree(wdata);
 389         return NULL;
 390     }
 391
 392     icon->image = p_new(unsigned char, size * 4);
 393     for(imgdata = icon->image, i = 2; i < size + 2; i++, imgdata += 4)
 394     {
 395         pixel = data[i];
 396         imgdata[3] = (pixel >> 24) & 0xff; /* A */
 397         imgdata[0] = (pixel >> 16) & 0xff; /* R */
 398         imgdata[1] = (pixel >>  8) & 0xff; /* G */
 399         imgdata[2] = pixel & 0xff;         /* B */
 400     }
 401
 402     XFree(wdata);
 403
 404     return icon;
 405 }
 406
 407 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80