ewmh.c

   1 /*
   2  * ewmh.c - EWMH support functions
   3  *
   4  * Copyright © 2007-2009 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 <sys/types.h>
  23 #include <unistd.h>
  24
  25 #include <xcb/xcb.h>
  26 #include <xcb/xcb_atom.h>
  27
  28 #include "ewmh.h"
  29 #include "objects/tag.h"
  30 #include "screen.h"
  31 #include "objects/client.h"
  32 #include "luaa.h"
  33 #include "common/atoms.h"
  34 #include "common/buffer.h"
  35 #include "common/xutil.h"
  36
  37 #define _NET_WM_STATE_REMOVE 0
  38 #define _NET_WM_STATE_ADD 1
  39 #define _NET_WM_STATE_TOGGLE 2
  40
  41 /** Update client EWMH hints.
  42  * \param c The client.
  43  */
  44 static int
  45 ewmh_client_update_hints(lua_State *L)
  46 {
  47     client_t *c = luaA_checkudata(L, 1, &client_class);
  48     xcb_atom_t state[10]; /* number of defined state atoms */
  49     int i = 0;
  50
  51     if(c->modal)
  52         state[i++] = _NET_WM_STATE_MODAL;
  53     if(c->fullscreen)
  54         state[i++] = _NET_WM_STATE_FULLSCREEN;
  55     if(c->maximized_vertical)
  56         state[i++] = _NET_WM_STATE_MAXIMIZED_VERT;
  57     if(c->maximized_horizontal)
  58         state[i++] = _NET_WM_STATE_MAXIMIZED_HORZ;
  59     if(c->sticky)
  60         state[i++] = _NET_WM_STATE_STICKY;
  61     if(c->skip_taskbar)
  62         state[i++] = _NET_WM_STATE_SKIP_TASKBAR;
  63     if(c->above)
  64         state[i++] = _NET_WM_STATE_ABOVE;
  65     if(c->below)
  66         state[i++] = _NET_WM_STATE_BELOW;
  67     if(c->minimized)
  68         state[i++] = _NET_WM_STATE_HIDDEN;
  69     if(c->urgent)
  70         state[i++] = _NET_WM_STATE_DEMANDS_ATTENTION;
  71
  72     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
  73                         c->window, _NET_WM_STATE, XCB_ATOM_ATOM, 32, i, state);
  74
  75     return 0;
  76 }
  77
  78 static int
  79 ewmh_update_net_active_window(lua_State *L)
  80 {
  81     xcb_window_t win;
  82
  83     if(globalconf.focus.client)
  84         win = globalconf.focus.client->window;
  85     else
  86         win = XCB_NONE;
  87
  88     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
  89                         globalconf.screen->root,
  90                         _NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &win);
  91
  92     return 0;
  93 }
  94
  95 static int
  96 ewmh_update_net_client_list(lua_State *L)
  97 {
  98     xcb_window_t *wins = p_alloca(xcb_window_t, globalconf.clients.len);
  99
 100     int n = 0;
 101     foreach(client, globalconf.clients)
 102         wins[n++] = (*client)->window;
 103
 104     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 105                         globalconf.screen->root,
 106                         _NET_CLIENT_LIST, XCB_ATOM_WINDOW, 32, n, wins);
 107
 108     return 0;
 109 }
 110
 111 void
 112 ewmh_init(void)
 113 {
 114     xcb_window_t father;
 115     xcb_screen_t *xscreen = globalconf.screen;
 116     xcb_atom_t atom[] =
 117     {
 118         _NET_SUPPORTED,
 119         _NET_SUPPORTING_WM_CHECK,
 120         _NET_STARTUP_ID,
 121         _NET_CLIENT_LIST,
 122         _NET_CLIENT_LIST_STACKING,
 123         _NET_NUMBER_OF_DESKTOPS,
 124         _NET_CURRENT_DESKTOP,
 125         _NET_DESKTOP_NAMES,
 126         _NET_ACTIVE_WINDOW,
 127         _NET_CLOSE_WINDOW,
 128         _NET_WM_NAME,
 129         _NET_WM_STRUT_PARTIAL,
 130         _NET_WM_ICON_NAME,
 131         _NET_WM_VISIBLE_ICON_NAME,
 132         _NET_WM_DESKTOP,
 133         _NET_WM_WINDOW_TYPE,
 134         _NET_WM_WINDOW_TYPE_DESKTOP,
 135         _NET_WM_WINDOW_TYPE_DOCK,
 136         _NET_WM_WINDOW_TYPE_TOOLBAR,
 137         _NET_WM_WINDOW_TYPE_MENU,
 138         _NET_WM_WINDOW_TYPE_UTILITY,
 139         _NET_WM_WINDOW_TYPE_SPLASH,
 140         _NET_WM_WINDOW_TYPE_DIALOG,
 141         _NET_WM_WINDOW_TYPE_DROPDOWN_MENU,
 142         _NET_WM_WINDOW_TYPE_POPUP_MENU,
 143         _NET_WM_WINDOW_TYPE_TOOLTIP,
 144         _NET_WM_WINDOW_TYPE_NOTIFICATION,
 145         _NET_WM_WINDOW_TYPE_COMBO,
 146         _NET_WM_WINDOW_TYPE_DND,
 147         _NET_WM_WINDOW_TYPE_NORMAL,
 148         _NET_WM_ICON,
 149         _NET_WM_PID,
 150         _NET_WM_STATE,
 151         _NET_WM_STATE_STICKY,
 152         _NET_WM_STATE_SKIP_TASKBAR,
 153         _NET_WM_STATE_FULLSCREEN,
 154         _NET_WM_STATE_MAXIMIZED_HORZ,
 155         _NET_WM_STATE_MAXIMIZED_VERT,
 156         _NET_WM_STATE_ABOVE,
 157         _NET_WM_STATE_BELOW,
 158         _NET_WM_STATE_MODAL,
 159         _NET_WM_STATE_HIDDEN,
 160         _NET_WM_STATE_DEMANDS_ATTENTION
 161     };
 162     int i;
 163
 164     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 165                         xscreen->root, _NET_SUPPORTED, XCB_ATOM_ATOM, 32,
 166                         countof(atom), atom);
 167
 168     /* create our own window */
 169     father = xcb_generate_id(globalconf.connection);
 170     xcb_create_window(globalconf.connection, xscreen->root_depth,
 171                       father, xscreen->root, -1, -1, 1, 1, 0,
 172                       XCB_COPY_FROM_PARENT, xscreen->root_visual, 0, NULL);
 173
 174     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 175                         xscreen->root, _NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32,
 176                         1, &father);
 177
 178     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 179                         father, _NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32,
 180                         1, &father);
 181
 182     /* set the window manager name */
 183     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 184                         father, _NET_WM_NAME, UTF8_STRING, 8, 7, "awesome");
 185
 186     /* set the window manager PID */
 187     i = getpid();
 188     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 189                         father, _NET_WM_PID, XCB_ATOM_CARDINAL, 32, 1, &i);
 190
 191
 192     luaA_class_connect_signal(globalconf.L, &client_class, "focus", ewmh_update_net_active_window);
 193     luaA_class_connect_signal(globalconf.L, &client_class, "unfocus", ewmh_update_net_active_window);
 194     luaA_class_connect_signal(globalconf.L, &client_class, "manage", ewmh_update_net_client_list);
 195     luaA_class_connect_signal(globalconf.L, &client_class, "unmanage", ewmh_update_net_client_list);
 196     luaA_class_connect_signal(globalconf.L, &client_class, "property::modal" , ewmh_client_update_hints);
 197     luaA_class_connect_signal(globalconf.L, &client_class, "property::fullscreen" , ewmh_client_update_hints);
 198     luaA_class_connect_signal(globalconf.L, &client_class, "property::maximized_horizontal" , ewmh_client_update_hints);
 199     luaA_class_connect_signal(globalconf.L, &client_class, "property::maximized_vertical" , ewmh_client_update_hints);
 200     luaA_class_connect_signal(globalconf.L, &client_class, "property::sticky" , ewmh_client_update_hints);
 201     luaA_class_connect_signal(globalconf.L, &client_class, "property::skip_taskbar" , ewmh_client_update_hints);
 202     luaA_class_connect_signal(globalconf.L, &client_class, "property::above" , ewmh_client_update_hints);
 203     luaA_class_connect_signal(globalconf.L, &client_class, "property::below" , ewmh_client_update_hints);
 204     luaA_class_connect_signal(globalconf.L, &client_class, "property::minimized" , ewmh_client_update_hints);
 205     luaA_class_connect_signal(globalconf.L, &client_class, "property::urgent" , ewmh_client_update_hints);
 206 }
 207
 208 /** Set the client list in stacking order, bottom to top.
 209  */
 210 void
 211 ewmh_update_net_client_list_stacking(void)
 212 {
 213     int n = 0;
 214     xcb_window_t *wins = p_alloca(xcb_window_t, globalconf.stack.len);
 215
 216     foreach(client, globalconf.stack)
 217         wins[n++] = (*client)->window;
 218
 219     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 220                         globalconf.screen->root,
 221                         _NET_CLIENT_LIST_STACKING, XCB_ATOM_WINDOW, 32, n, wins);
 222 }
 223
 224 void
 225 ewmh_update_net_numbers_of_desktop(void)
 226 {
 227     uint32_t count = globalconf.tags.len;
 228
 229     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 230                         globalconf.screen->root,
 231                         _NET_NUMBER_OF_DESKTOPS, XCB_ATOM_CARDINAL, 32, 1, &count);
 232 }
 233
 234 void
 235 ewmh_update_net_current_desktop(void)
 236 {
 237     uint32_t idx = tags_get_first_selected_index();
 238
 239     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 240                         globalconf.screen->root,
 241                         _NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
 242 }
 243
 244 void
 245 ewmh_update_net_desktop_names(void)
 246 {
 247     buffer_t buf;
 248
 249     buffer_inita(&buf, BUFSIZ);
 250
 251     foreach(tag, globalconf.tags)
 252     {
 253         buffer_adds(&buf, tag_get_name(*tag));
 254         buffer_addc(&buf, '\0');
 255     }
 256
 257     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 258                         globalconf.screen->root,
 259                         _NET_DESKTOP_NAMES, UTF8_STRING, 8, buf.len, buf.s);
 260     buffer_wipe(&buf);
 261 }
 262
 263 static void
 264 ewmh_process_state_atom(client_t *c, xcb_atom_t state, int set)
 265 {
 266     luaA_object_push(globalconf.L, c);
 267
 268     if(state == _NET_WM_STATE_STICKY)
 269     {
 270         if(set == _NET_WM_STATE_REMOVE)
 271             client_set_sticky(globalconf.L, -1, false);
 272         else if(set == _NET_WM_STATE_ADD)
 273             client_set_sticky(globalconf.L, -1, true);
 274         else if(set == _NET_WM_STATE_TOGGLE)
 275             client_set_sticky(globalconf.L, -1, !c->sticky);
 276     }
 277     else if(state == _NET_WM_STATE_SKIP_TASKBAR)
 278     {
 279         if(set == _NET_WM_STATE_REMOVE)
 280             client_set_skip_taskbar(globalconf.L, -1, false);
 281         else if(set == _NET_WM_STATE_ADD)
 282             client_set_skip_taskbar(globalconf.L, -1, true);
 283         else if(set == _NET_WM_STATE_TOGGLE)
 284             client_set_skip_taskbar(globalconf.L, -1, !c->skip_taskbar);
 285     }
 286     else if(state == _NET_WM_STATE_FULLSCREEN)
 287     {
 288         if(set == _NET_WM_STATE_REMOVE)
 289             client_set_fullscreen(globalconf.L, -1, false);
 290         else if(set == _NET_WM_STATE_ADD)
 291             client_set_fullscreen(globalconf.L, -1, true);
 292         else if(set == _NET_WM_STATE_TOGGLE)
 293             client_set_fullscreen(globalconf.L, -1, !c->fullscreen);
 294     }
 295     else if(state == _NET_WM_STATE_MAXIMIZED_HORZ)
 296     {
 297         if(set == _NET_WM_STATE_REMOVE)
 298             client_set_maximized_horizontal(globalconf.L, -1, false);
 299         else if(set == _NET_WM_STATE_ADD)
 300             client_set_maximized_horizontal(globalconf.L, -1, true);
 301         else if(set == _NET_WM_STATE_TOGGLE)
 302             client_set_maximized_horizontal(globalconf.L, -1, !c->maximized_horizontal);
 303     }
 304     else if(state == _NET_WM_STATE_MAXIMIZED_VERT)
 305     {
 306         if(set == _NET_WM_STATE_REMOVE)
 307             client_set_maximized_vertical(globalconf.L, -1, false);
 308         else if(set == _NET_WM_STATE_ADD)
 309             client_set_maximized_vertical(globalconf.L, -1, true);
 310         else if(set == _NET_WM_STATE_TOGGLE)
 311             client_set_maximized_vertical(globalconf.L, -1, !c->maximized_vertical);
 312     }
 313     else if(state == _NET_WM_STATE_ABOVE)
 314     {
 315         if(set == _NET_WM_STATE_REMOVE)
 316             client_set_above(globalconf.L, -1, false);
 317         else if(set == _NET_WM_STATE_ADD)
 318             client_set_above(globalconf.L, -1, true);
 319         else if(set == _NET_WM_STATE_TOGGLE)
 320             client_set_above(globalconf.L, -1, !c->above);
 321     }
 322     else if(state == _NET_WM_STATE_BELOW)
 323     {
 324         if(set == _NET_WM_STATE_REMOVE)
 325             client_set_below(globalconf.L, -1, false);
 326         else if(set == _NET_WM_STATE_ADD)
 327             client_set_below(globalconf.L, -1, true);
 328         else if(set == _NET_WM_STATE_TOGGLE)
 329             client_set_below(globalconf.L, -1, !c->below);
 330     }
 331     else if(state == _NET_WM_STATE_MODAL)
 332     {
 333         if(set == _NET_WM_STATE_REMOVE)
 334             client_set_modal(globalconf.L, -1, false);
 335         else if(set == _NET_WM_STATE_ADD)
 336             client_set_modal(globalconf.L, -1, true);
 337         else if(set == _NET_WM_STATE_TOGGLE)
 338             client_set_modal(globalconf.L, -1, !c->modal);
 339     }
 340     else if(state == _NET_WM_STATE_HIDDEN)
 341     {
 342         if(set == _NET_WM_STATE_REMOVE)
 343             client_set_minimized(globalconf.L, -1, false);
 344         else if(set == _NET_WM_STATE_ADD)
 345             client_set_minimized(globalconf.L, -1, true);
 346         else if(set == _NET_WM_STATE_TOGGLE)
 347             client_set_minimized(globalconf.L, -1, !c->minimized);
 348     }
 349     else if(state == _NET_WM_STATE_DEMANDS_ATTENTION)
 350     {
 351         if(set == _NET_WM_STATE_REMOVE)
 352             client_set_urgent(globalconf.L, -1, false);
 353         else if(set == _NET_WM_STATE_ADD)
 354             client_set_urgent(globalconf.L, -1, true);
 355         else if(set == _NET_WM_STATE_TOGGLE)
 356             client_set_urgent(globalconf.L, -1, !c->urgent);
 357     }
 358
 359     lua_pop(globalconf.L, 1);
 360 }
 361
 362 int
 363 ewmh_process_client_message(xcb_client_message_event_t *ev)
 364 {
 365     client_t *c;
 366
 367     if(ev->type == _NET_CURRENT_DESKTOP)
 368         tag_view_only_byindex(ev->data.data32[0]);
 369     else if(ev->type == _NET_CLOSE_WINDOW)
 370     {
 371         if((c = client_getbywin(ev->window)))
 372            client_kill(c);
 373     }
 374     else if(ev->type == _NET_WM_DESKTOP)
 375     {
 376         if((c = client_getbywin(ev->window)))
 377         {
 378             if(ev->data.data32[0] == 0xffffffff)
 379                 c->sticky = true;
 380             else
 381                 for(int i = 0; i < globalconf.tags.len; i++)
 382                     if((int)ev->data.data32[0] == i)
 383                     {
 384                         luaA_object_push(globalconf.L, globalconf.tags.tab[i]);
 385                         tag_client(c);
 386                     }
 387                     else
 388                         untag_client(c, globalconf.tags.tab[i]);
 389         }
 390     }
 391     else if(ev->type == _NET_WM_STATE)
 392     {
 393         if((c = client_getbywin(ev->window)))
 394         {
 395             ewmh_process_state_atom(c, (xcb_atom_t) ev->data.data32[1], ev->data.data32[0]);
 396             if(ev->data.data32[2])
 397                 ewmh_process_state_atom(c, (xcb_atom_t) ev->data.data32[2],
 398                                         ev->data.data32[0]);
 399         }
 400     }
 401     else if(ev->type == _NET_ACTIVE_WINDOW)
 402     {
 403         if((c = client_getbywin(ev->window))) {
 404             client_focus(c);
 405             client_raise(c);
 406         }
 407     }
 408
 409     return 0;
 410 }
 411
 412 /** Update the client active desktop.
 413  * This is "wrong" since it can be on several tags, but EWMH has a strict view
 414  * of desktop system so just take the first tag.
 415  * \param c The client.
 416  */
 417 void
 418 ewmh_client_update_desktop(client_t *c)
 419 {
 420     int i;
 421
 422     for(i = 0; i < globalconf.tags.len; i++)
 423         if(is_client_tagged(c, globalconf.tags.tab[i]))
 424         {
 425             xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 426                                 c->window, _NET_WM_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &i);
 427             return;
 428         }
 429     /* It doesn't have any tags, remove the property */
 430     xcb_delete_property(globalconf.connection, c->window, _NET_WM_DESKTOP);
 431 }
 432
 433 /** Update the client struts.
 434  * \param window The window to update the struts for.
 435  * \param strut The strut type to update the window with.
 436  */
 437 void
 438 ewmh_update_strut(xcb_window_t window, strut_t *strut)
 439 {
 440     if(window)
 441     {
 442         const uint32_t state[] =
 443         {
 444             strut->left,
 445             strut->right,
 446             strut->top,
 447             strut->bottom,
 448             strut->left_start_y,
 449             strut->left_end_y,
 450             strut->right_start_y,
 451             strut->right_end_y,
 452             strut->top_start_x,
 453             strut->top_end_x,
 454             strut->bottom_start_x,
 455             strut->bottom_end_x
 456         };
 457
 458         xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 459                             window, _NET_WM_STRUT_PARTIAL, XCB_ATOM_CARDINAL, 32, countof(state), state);
 460     }
 461 }
 462
 463 /** Update the window type.
 464  * \param window The window to update.
 465  * \param type The new type to set.
 466  */
 467 void
 468 ewmh_update_window_type(xcb_window_t window, uint32_t type)
 469 {
 470     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 471                         window, _NET_WM_WINDOW_TYPE, XCB_ATOM_ATOM, 32, 1, &type);
 472 }
 473
 474 void
 475 ewmh_client_check_hints(client_t *c)
 476 {
 477     xcb_atom_t *state;
 478     void *data = NULL;
 479     int desktop;
 480     xcb_get_property_cookie_t c0, c1, c2;
 481     xcb_get_property_reply_t *reply;
 482
 483     /* Send the GetProperty requests which will be processed later */
 484     c0 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 485                                     _NET_WM_DESKTOP, XCB_GET_PROPERTY_TYPE_ANY, 0, 1);
 486
 487     c1 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 488                                     _NET_WM_STATE, XCB_ATOM_ATOM, 0, UINT32_MAX);
 489
 490     c2 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 491                                     _NET_WM_WINDOW_TYPE, XCB_ATOM_ATOM, 0, UINT32_MAX);
 492
 493     reply = xcb_get_property_reply(globalconf.connection, c0, NULL);
 494     if(reply && reply->value_len && (data = xcb_get_property_value(reply)))
 495     {
 496         desktop = *(uint32_t *) data;
 497         if(desktop == -1)
 498             c->sticky = true;
 499         else if (desktop >= 0 && desktop < globalconf.tags.len)
 500             for(int i = 0; i < globalconf.tags.len; i++)
 501                 if(desktop == i)
 502                 {
 503                     luaA_object_push(globalconf.L, globalconf.tags.tab[i]);
 504                     tag_client(c);
 505                 }
 506                 else
 507                     untag_client(c, globalconf.tags.tab[i]);
 508         else
 509             /* Value out of bounds, just give it the first tag */
 510             if (globalconf.tags.len > 0)
 511             {
 512                 luaA_object_push(globalconf.L, globalconf.tags.tab[0]);
 513                 tag_client(c);
 514             }
 515     }
 516
 517     p_delete(&reply);
 518
 519     reply = xcb_get_property_reply(globalconf.connection, c1, NULL);
 520     if(reply && (data = xcb_get_property_value(reply)))
 521     {
 522         state = (xcb_atom_t *) data;
 523         for(int i = 0; i < xcb_get_property_value_length(reply) / ssizeof(xcb_atom_t); i++)
 524             ewmh_process_state_atom(c, state[i], _NET_WM_STATE_ADD);
 525     }
 526
 527     p_delete(&reply);
 528
 529     reply = xcb_get_property_reply(globalconf.connection, c2, NULL);
 530     if(reply && (data = xcb_get_property_value(reply)))
 531     {
 532         state = (xcb_atom_t *) data;
 533         for(int i = 0; i < xcb_get_property_value_length(reply) / ssizeof(xcb_atom_t); i++)
 534             if(state[i] == _NET_WM_WINDOW_TYPE_DESKTOP)
 535                 c->type = MAX(c->type, WINDOW_TYPE_DESKTOP);
 536             else if(state[i] == _NET_WM_WINDOW_TYPE_DIALOG)
 537                 c->type = MAX(c->type, WINDOW_TYPE_DIALOG);
 538             else if(state[i] == _NET_WM_WINDOW_TYPE_SPLASH)
 539                 c->type = MAX(c->type, WINDOW_TYPE_SPLASH);
 540             else if(state[i] == _NET_WM_WINDOW_TYPE_DOCK)
 541                 c->type = MAX(c->type, WINDOW_TYPE_DOCK);
 542             else if(state[i] == _NET_WM_WINDOW_TYPE_MENU)
 543                 c->type = MAX(c->type, WINDOW_TYPE_MENU);
 544             else if(state[i] == _NET_WM_WINDOW_TYPE_TOOLBAR)
 545                 c->type = MAX(c->type, WINDOW_TYPE_TOOLBAR);
 546             else if(state[i] == _NET_WM_WINDOW_TYPE_UTILITY)
 547                 c->type = MAX(c->type, WINDOW_TYPE_UTILITY);
 548     }
 549
 550     p_delete(&reply);
 551 }
 552
 553 /** Process the WM strut of a client.
 554  * \param c The client.
 555  * \param strut_r (Optional) An existing reply.
 556  */
 557 void
 558 ewmh_process_client_strut(client_t *c)
 559 {
 560     void *data;
 561     xcb_get_property_reply_t *strut_r;
 562
 563     xcb_get_property_cookie_t strut_q = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 564                                                                    _NET_WM_STRUT_PARTIAL, XCB_ATOM_CARDINAL, 0, 12);
 565     strut_r = xcb_get_property_reply(globalconf.connection, strut_q, NULL);
 566
 567     if(strut_r
 568        && strut_r->value_len
 569        && (data = xcb_get_property_value(strut_r)))
 570     {
 571         uint32_t *strut = data;
 572
 573         if(c->strut.left != strut[0]
 574            || c->strut.right != strut[1]
 575            || c->strut.top != strut[2]
 576            || c->strut.bottom != strut[3]
 577            || c->strut.left_start_y != strut[4]
 578            || c->strut.left_end_y != strut[5]
 579            || c->strut.right_start_y != strut[6]
 580            || c->strut.right_end_y != strut[7]
 581            || c->strut.top_start_x != strut[8]
 582            || c->strut.top_end_x != strut[9]
 583            || c->strut.bottom_start_x != strut[10]
 584            || c->strut.bottom_end_x != strut[11])
 585         {
 586             c->strut.left = strut[0];
 587             c->strut.right = strut[1];
 588             c->strut.top = strut[2];
 589             c->strut.bottom = strut[3];
 590             c->strut.left_start_y = strut[4];
 591             c->strut.left_end_y = strut[5];
 592             c->strut.right_start_y = strut[6];
 593             c->strut.right_end_y = strut[7];
 594             c->strut.top_start_x = strut[8];
 595             c->strut.top_end_x = strut[9];
 596             c->strut.bottom_start_x = strut[10];
 597             c->strut.bottom_end_x = strut[11];
 598
 599             luaA_object_push(globalconf.L, c);
 600             luaA_object_emit_signal(globalconf.L, -1, "property::struts", 0);
 601             lua_pop(globalconf.L, 1);
 602         }
 603     }
 604
 605     p_delete(&strut_r);
 606 }
 607
 608 /** Send request to get NET_WM_ICON (EWMH)
 609  * \param w The window.
 610  * \return The cookie associated with the request.
 611  */
 612 xcb_get_property_cookie_t
 613 ewmh_window_icon_get_unchecked(xcb_window_t w)
 614 {
 615   return xcb_get_property_unchecked(globalconf.connection, false, w,
 616                                     _NET_WM_ICON, XCB_ATOM_CARDINAL, 0, UINT32_MAX);
 617 }
 618
 619 static cairo_surface_t *
 620 ewmh_window_icon_from_reply(xcb_get_property_reply_t *r)
 621 {
 622     uint32_t *data;
 623     uint64_t len;
 624
 625     if(!r || r->type != XCB_ATOM_CARDINAL || r->format != 32 || r->length < 2)
 626         return 0;
 627
 628     data = (uint32_t *) xcb_get_property_value(r);
 629     if (!data)
 630         return 0;
 631
 632     /* Check that the property is as long as it should be, handling integer
 633      * overflow. <uint32_t> times <another uint32_t casted to uint64_t> always
 634      * fits into an uint64_t and thus this multiplication cannot overflow.
 635      */
 636     len = data[0] * (uint64_t) data[1];
 637     if (!data[0] || !data[1] || len > r->length - 2)
 638         return 0;
 639
 640     return draw_surface_from_data(data[0], data[1], data + 2);
 641 }
 642
 643 /** Get NET_WM_ICON.
 644  * \param cookie The cookie.
 645  * \return The number of elements on stack.
 646  */
 647 cairo_surface_t *
 648 ewmh_window_icon_get_reply(xcb_get_property_cookie_t cookie)
 649 {
 650     xcb_get_property_reply_t *r = xcb_get_property_reply(globalconf.connection, cookie, NULL);
 651     cairo_surface_t *surface = ewmh_window_icon_from_reply(r);
 652     p_delete(&r);
 653     return surface;
 654 }
 655
 656 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80