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 "util.h"
  27 #include "tag.h"
  28 #include "focus.h"
  29 #include "screen.h"
  30 #include "client.h"
  31 #include "statusbar.h"
  32
  33 extern AwesomeConf globalconf;
  34
  35 static Atom net_supported;
  36 static Atom net_client_list;
  37 static Atom net_number_of_desktops;
  38 static Atom net_current_desktop;
  39 static Atom net_desktop_names;
  40 static Atom net_active_window;
  41
  42 static Atom net_close_window;
  43
  44 static Atom net_wm_name;
  45 static Atom net_wm_icon_name;
  46 static Atom net_wm_window_type;
  47 static Atom net_wm_window_type_normal;
  48 static Atom net_wm_window_type_dock;
  49 static Atom net_wm_window_type_splash;
  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_ICON", &net_wm_icon },
  82     { "_NET_WM_STATE", &net_wm_state },
  83     { "_NET_WM_STATE_STICKY", &net_wm_state_sticky },
  84     { "_NET_WM_STATE_SKIP_TASKBAR", &net_wm_state_skip_taskbar },
  85     { "_NET_WM_STATE_FULLSCREEN", &net_wm_state_fullscreen },
  86
  87     { "UTF8_STRING", &utf8_string },
  88 };
  89
  90 #define ATOM_NUMBER (sizeof(AtomNames)/sizeof(AtomItem))
  91
  92 #define _NET_WM_STATE_REMOVE 0
  93 #define _NET_WM_STATE_ADD 1
  94 #define _NET_WM_STATE_TOGGLE 2
  95
  96 void
  97 ewmh_init_atoms(void)
  98 {
  99     unsigned int i;
 100     char *names[ATOM_NUMBER];
 101     Atom atoms[ATOM_NUMBER];
 102
 103     for(i = 0; i < ATOM_NUMBER; i++)
 104         names[i] = (char *) AtomNames[i].name;
 105     XInternAtoms(globalconf.display, names, ATOM_NUMBER, False, atoms);
 106     for(i = 0; i < ATOM_NUMBER; i++)
 107         *AtomNames[i].atom = atoms[i];
 108 }
 109
 110 void
 111 ewmh_set_supported_hints(int phys_screen)
 112 {
 113     Atom atom[ATOM_NUMBER];
 114     int i = 0;
 115
 116     atom[i++] = net_supported;
 117     atom[i++] = net_client_list;
 118     atom[i++] = net_number_of_desktops;
 119     atom[i++] = net_current_desktop;
 120     atom[i++] = net_desktop_names;
 121     atom[i++] = net_active_window;
 122
 123     atom[i++] = net_close_window;
 124
 125     atom[i++] = net_wm_name;
 126     atom[i++] = net_wm_icon_name;
 127     atom[i++] = net_wm_window_type;
 128     atom[i++] = net_wm_window_type_normal;
 129     atom[i++] = net_wm_window_type_dock;
 130     atom[i++] = net_wm_window_type_splash;
 131     atom[i++] = net_wm_icon;
 132     atom[i++] = net_wm_state;
 133     atom[i++] = net_wm_state_sticky;
 134     atom[i++] = net_wm_state_skip_taskbar;
 135     atom[i++] = net_wm_state_fullscreen;
 136
 137     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 138                     net_supported, XA_ATOM, 32,
 139                     PropModeReplace, (unsigned char *) atom, i);
 140 }
 141
 142 void
 143 ewmh_update_net_client_list(int phys_screen)
 144 {
 145     Window *wins;
 146     Client *c;
 147     int n = 0;
 148
 149     for(c = globalconf.clients; c; c = c->next)
 150         if(get_phys_screen(c->screen) == phys_screen)
 151             n++;
 152
 153     wins = p_new(Window, n + 1);
 154
 155     for(n = 0, c = globalconf.clients; c; c = c->next, n++)
 156         if(get_phys_screen(c->screen) == phys_screen)
 157             wins[n] = c->win;
 158
 159     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 160                     net_client_list, XA_WINDOW, 32, PropModeReplace, (unsigned char *) wins, n);
 161
 162     p_delete(&wins);
 163     XFlush(globalconf.display);
 164 }
 165
 166 void
 167 ewmh_update_net_numbers_of_desktop(int phys_screen)
 168 {
 169     CARD32 count = 0;
 170     Tag *tag;
 171
 172     for(tag = globalconf.screens[phys_screen].tags; tag; tag = tag->next)
 173         count++;
 174
 175     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 176                     net_number_of_desktops, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &count, 1);
 177 }
 178
 179 void
 180 ewmh_update_net_current_desktop(int phys_screen)
 181 {
 182     CARD32 count = 0;
 183     Tag *tag, **curtags = get_current_tags(phys_screen);
 184
 185     for(tag = globalconf.screens[phys_screen].tags; tag != curtags[0]; tag = tag->next)
 186         count++;
 187
 188     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 189                     net_current_desktop, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &count, 1);
 190
 191     p_delete(&curtags);
 192 }
 193
 194 void
 195 ewmh_update_net_desktop_names(int phys_screen)
 196 {
 197     char buf[1024], *pos;
 198     ssize_t len, curr_size;
 199     Tag *tag;
 200
 201     pos = buf;
 202     len = 0;
 203     for(tag = globalconf.screens[phys_screen].tags; tag; tag = tag->next)
 204     {
 205         curr_size = a_strlen(tag->name);
 206         a_strcpy(pos, sizeof(buf), tag->name);
 207         pos += curr_size + 1;
 208         len += curr_size + 1;
 209     }
 210
 211     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 212                     net_desktop_names, utf8_string, 8, PropModeReplace, (unsigned char *) buf, len);
 213 }
 214
 215 void
 216 ewmh_update_net_active_window(int phys_screen)
 217 {
 218     Window win;
 219     Client *sel = focus_get_current_client(phys_screen);
 220
 221     win = sel ? sel->win : None;
 222
 223     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
 224                     net_active_window, XA_WINDOW, 32,  PropModeReplace, (unsigned char *) &win, 1);
 225 }
 226
 227 static void
 228 ewmh_process_state_atom(Client *c, Atom state, int set)
 229 {
 230     if(state == net_wm_state_sticky)
 231     {
 232         Tag *tag;
 233         for(tag = globalconf.screens[c->screen].tags; tag; tag = tag->next)
 234             tag_client(c, tag);
 235     }
 236     else if(state == net_wm_state_skip_taskbar)
 237     {
 238         if(set == _NET_WM_STATE_REMOVE)
 239             c->skiptb = False;
 240         else if(set == _NET_WM_STATE_ADD)
 241             c->skiptb = True;
 242     }
 243     else if(state == net_wm_state_fullscreen)
 244     {
 245         Area geometry;
 246         if(set == _NET_WM_STATE_REMOVE)
 247         {
 248             /* restore geometry */
 249             geometry = c->m_geometry;
 250             c->border = c->oldborder;
 251             c->ismax = False;
 252             c->isfloating = c->wasfloating;
 253         }
 254         else if(set == _NET_WM_STATE_ADD)
 255         {
 256             geometry = get_screen_area(c->screen, NULL, NULL);
 257             /* save geometry */
 258             c->m_geometry = c->geometry;
 259             c->wasfloating = c->isfloating;
 260             c->oldborder = c->border;
 261             c->border = 0;
 262             c->ismax = True;
 263             c->isfloating = True;
 264         }
 265         statusbar_draw_all(c->screen);
 266         client_resize(c, geometry, False);
 267         XRaiseWindow(globalconf.display, c->win);
 268     }
 269 }
 270
 271 static void
 272 ewmh_process_window_type_atom(Client *c, Atom state)
 273 {
 274     if(state == net_wm_window_type_normal)
 275     {
 276         /* do nothing */
 277     }
 278     else if(state == net_wm_window_type_dock
 279             || state == net_wm_window_type_splash)
 280     {
 281         c->border = 0;
 282         c->skip = True;
 283         c->isfixed = True;
 284         c->isfloating = True;
 285     }
 286 }
 287 void
 288 ewmh_process_client_message(XClientMessageEvent *ev)
 289 {
 290     Client *c;
 291     int screen;
 292
 293     if(ev->message_type == net_current_desktop)
 294         for(screen = 0; screen < ScreenCount(globalconf.display); screen++)
 295             if(ev->window == RootWindow(globalconf.display, screen))
 296                 tag_view(screen, ev->data.l[0]);
 297
 298     if(ev->message_type == net_close_window)
 299     {
 300         if((c = get_client_bywin(globalconf.clients, ev->window)))
 301            client_kill(c);
 302     }
 303     else if(ev->message_type == net_wm_state)
 304     {
 305         if((c = get_client_bywin(globalconf.clients, ev->window)))
 306         {
 307             ewmh_process_state_atom(c, (Atom) ev->data.l[1], ev->data.l[0]);
 308             if(ev->data.l[2])
 309                 ewmh_process_state_atom(c, (Atom) ev->data.l[2], ev->data.l[0]);
 310         }
 311     }
 312 }
 313
 314 void
 315 ewmh_check_client_hints(Client *c)
 316 {
 317     int format;
 318     Atom real, *state;
 319     unsigned char *data = NULL;
 320     unsigned long i, n, extra;
 321
 322     if(XGetWindowProperty(globalconf.display, c->win, net_wm_state, 0L, LONG_MAX, False,
 323                           XA_ATOM, &real, &format, &n, &extra,
 324                           (unsigned char **) &data) == Success && data)
 325     {
 326         state = (Atom *) data;
 327         for(i = 0; i < n; i++)
 328             ewmh_process_state_atom(c, state[i], _NET_WM_STATE_ADD);
 329
 330         XFree(data);
 331     }
 332
 333     if(XGetWindowProperty(globalconf.display, c->win, net_wm_window_type, 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_window_type_atom(c, state[i]);
 340
 341         XFree(data);
 342     }
 343 }
 344
 345 NetWMIcon *
 346 ewmh_get_window_icon(Window w)
 347 {
 348     NetWMIcon *icon;
 349     Atom type;
 350     int format, size, i;
 351     unsigned long items, rest, *data, pixel;
 352     unsigned char *imgdata, *wdata;
 353
 354     if(XGetWindowProperty(globalconf.display, w,
 355                           net_wm_icon, 0L, LONG_MAX, False, XA_CARDINAL, &type, &format,
 356                           &items, &rest, &wdata) != Success
 357        || !wdata)
 358         return NULL;
 359
 360     if(type != XA_CARDINAL || format != 32 || items < 2)
 361     {
 362         XFree(wdata);
 363         return NULL;
 364     }
 365
 366     icon = p_new(NetWMIcon, 1);
 367
 368     data = (unsigned long *) wdata;
 369
 370     icon->width = data[0];
 371     icon->height = data[1];
 372     size = icon->width * icon->height;
 373
 374     if(!size)
 375     {
 376         p_delete(&icon);
 377         XFree(wdata);
 378         return NULL;
 379     }
 380
 381     icon->image = p_new(unsigned char, size * 4);
 382     for(imgdata = icon->image, i = 2; i < size + 2; i++, imgdata += 4)
 383     {
 384         pixel = data[i];
 385         imgdata[3] = (pixel >> 24) & 0xff; /* A */
 386         imgdata[0] = (pixel >> 16) & 0xff; /* R */
 387         imgdata[1] = (pixel >>  8) & 0xff; /* G */
 388         imgdata[2] = pixel & 0xff;         /* B */
 389     }
 390
 391     XFree(wdata);
 392
 393     return icon;
 394 }
 395
 396 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80