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 "tag.h"
  30 #include "screen.h"
  31 #include "client.h"
  32 #include "widget.h"
  33 #include "wibox.h"
  34 #include "luaa.h"
  35 #include "common/atoms.h"
  36 #include "common/buffer.h"
  37 #include "common/xutil.h"
  38
  39 #define _NET_WM_STATE_REMOVE 0
  40 #define _NET_WM_STATE_ADD 1
  41 #define _NET_WM_STATE_TOGGLE 2
  42
  43 /** Update the desktop geometry.
  44  * \param phys_screen The physical screen id.
  45  */
  46 static void
  47 ewmh_update_desktop_geometry(int phys_screen)
  48 {
  49     area_t geom = screen_area_get(&globalconf.screens.tab[phys_screen], false);
  50     uint32_t sizes[] = { geom.width, geom.height };
  51
  52     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
  53                         xutil_screen_get(globalconf.connection, phys_screen)->root,
  54                         _NET_DESKTOP_GEOMETRY, XCB_ATOM_CARDINAL, 32, countof(sizes), sizes);
  55 }
  56
  57 void
  58 ewmh_init(int phys_screen)
  59 {
  60     xcb_window_t father;
  61     xcb_screen_t *xscreen = xutil_screen_get(globalconf.connection, phys_screen);
  62     xcb_atom_t atom[] =
  63     {
  64         _NET_SUPPORTED,
  65         _NET_SUPPORTING_WM_CHECK,
  66         _NET_STARTUP_ID,
  67         _NET_CLIENT_LIST,
  68         _NET_CLIENT_LIST_STACKING,
  69         _NET_NUMBER_OF_DESKTOPS,
  70         _NET_CURRENT_DESKTOP,
  71         _NET_DESKTOP_NAMES,
  72         _NET_ACTIVE_WINDOW,
  73         _NET_DESKTOP_GEOMETRY,
  74         _NET_CLOSE_WINDOW,
  75         _NET_WM_NAME,
  76         _NET_WM_STRUT_PARTIAL,
  77         _NET_WM_ICON_NAME,
  78         _NET_WM_VISIBLE_ICON_NAME,
  79         _NET_WM_DESKTOP,
  80         _NET_WM_WINDOW_TYPE,
  81         _NET_WM_WINDOW_TYPE_DESKTOP,
  82         _NET_WM_WINDOW_TYPE_DOCK,
  83         _NET_WM_WINDOW_TYPE_TOOLBAR,
  84         _NET_WM_WINDOW_TYPE_MENU,
  85         _NET_WM_WINDOW_TYPE_UTILITY,
  86         _NET_WM_WINDOW_TYPE_SPLASH,
  87         _NET_WM_WINDOW_TYPE_DIALOG,
  88         _NET_WM_WINDOW_TYPE_DROPDOWN_MENU,
  89         _NET_WM_WINDOW_TYPE_POPUP_MENU,
  90         _NET_WM_WINDOW_TYPE_TOOLTIP,
  91         _NET_WM_WINDOW_TYPE_NOTIFICATION,
  92         _NET_WM_WINDOW_TYPE_COMBO,
  93         _NET_WM_WINDOW_TYPE_DND,
  94         _NET_WM_WINDOW_TYPE_NORMAL,
  95         _NET_WM_ICON,
  96         _NET_WM_PID,
  97         _NET_WM_STATE,
  98         _NET_WM_STATE_STICKY,
  99         _NET_WM_STATE_SKIP_TASKBAR,
 100         _NET_WM_STATE_FULLSCREEN,
 101         _NET_WM_STATE_MAXIMIZED_HORZ,
 102         _NET_WM_STATE_MAXIMIZED_VERT,
 103         _NET_WM_STATE_ABOVE,
 104         _NET_WM_STATE_BELOW,
 105         _NET_WM_STATE_MODAL,
 106         _NET_WM_STATE_HIDDEN,
 107         _NET_WM_STATE_DEMANDS_ATTENTION
 108     };
 109     int i;
 110
 111     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 112                         xscreen->root, _NET_SUPPORTED, XCB_ATOM_ATOM, 32,
 113                         countof(atom), atom);
 114
 115     /* create our own window */
 116     father = xcb_generate_id(globalconf.connection);
 117     xcb_create_window(globalconf.connection, xscreen->root_depth,
 118                       father, xscreen->root, -1, -1, 1, 1, 0,
 119                       XCB_COPY_FROM_PARENT, xscreen->root_visual, 0, NULL);
 120
 121     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 122                         xscreen->root, _NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32,
 123                         1, &father);
 124
 125     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 126                         father, _NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32,
 127                         1, &father);
 128
 129     /* set the window manager name */
 130     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 131                         father, _NET_WM_NAME, UTF8_STRING, 8, 7, "awesome");
 132
 133     /* set the window manager PID */
 134     i = getpid();
 135     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 136                         father, _NET_WM_PID, XCB_ATOM_CARDINAL, 32, 1, &i);
 137
 138     ewmh_update_desktop_geometry(phys_screen);
 139 }
 140
 141 void
 142 ewmh_update_net_client_list(int phys_screen)
 143 {
 144     xcb_window_t *wins = p_alloca(xcb_window_t, globalconf.clients.len);
 145
 146     int n = 0;
 147     foreach(_c, globalconf.clients)
 148     {
 149         client_t *c = *_c;
 150         if(c->phys_screen == phys_screen)
 151             wins[n++] = c->window;
 152     }
 153
 154     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 155                         xutil_screen_get(globalconf.connection, phys_screen)->root,
 156                         _NET_CLIENT_LIST, XCB_ATOM_WINDOW, 32, n, wins);
 157 }
 158
 159 /** Set the client list in stacking order, bottom to top.
 160  * \param phys_screen The physical screen id.
 161  */
 162 void
 163 ewmh_update_net_client_list_stacking(int phys_screen)
 164 {
 165     int n = 0;
 166     xcb_window_t *wins = p_alloca(xcb_window_t, globalconf.stack.len);
 167
 168     foreach(client, globalconf.stack)
 169         if((*client)->phys_screen == phys_screen)
 170             wins[n++] = (*client)->window;
 171
 172     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 173                         xutil_screen_get(globalconf.connection, phys_screen)->root,
 174                         _NET_CLIENT_LIST_STACKING, XCB_ATOM_WINDOW, 32, n, wins);
 175 }
 176
 177 void
 178 ewmh_update_net_numbers_of_desktop(int phys_screen)
 179 {
 180     uint32_t count = globalconf.screens.tab[phys_screen].tags.len;
 181
 182     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 183                         xutil_screen_get(globalconf.connection, phys_screen)->root,
 184                         _NET_NUMBER_OF_DESKTOPS, XCB_ATOM_CARDINAL, 32, 1, &count);
 185 }
 186
 187 void
 188 ewmh_update_net_current_desktop(int phys_screen)
 189 {
 190     uint32_t idx = tags_get_first_selected_index(&globalconf.screens.tab[phys_screen]);
 191
 192     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 193                         xutil_screen_get(globalconf.connection, phys_screen)->root,
 194                         _NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
 195 }
 196
 197 void
 198 ewmh_update_net_desktop_names(int phys_screen)
 199 {
 200     buffer_t buf;
 201
 202     buffer_inita(&buf, BUFSIZ);
 203
 204     foreach(tag, globalconf.screens.tab[phys_screen].tags)
 205     {
 206         buffer_adds(&buf, tag_get_name(*tag));
 207         buffer_addc(&buf, '\0');
 208     }
 209
 210     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 211                         xutil_screen_get(globalconf.connection, phys_screen)->root,
 212                         _NET_DESKTOP_NAMES, UTF8_STRING, 8, buf.len, buf.s);
 213     buffer_wipe(&buf);
 214 }
 215
 216 void
 217 ewmh_update_net_active_window(int phys_screen)
 218 {
 219     xcb_window_t win;
 220
 221     if(globalconf.screen_focus->client_focus
 222        && globalconf.screen_focus->client_focus->phys_screen == phys_screen)
 223         win = globalconf.screen_focus->client_focus->window;
 224     else
 225         win = XCB_NONE;
 226
 227     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 228                         xutil_screen_get(globalconf.connection, phys_screen)->root,
 229                         _NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &win);
 230 }
 231
 232 static void
 233 ewmh_process_state_atom(client_t *c, xcb_atom_t state, int set)
 234 {
 235     luaA_object_push(globalconf.L, c);
 236
 237     if(state == _NET_WM_STATE_STICKY)
 238     {
 239         if(set == _NET_WM_STATE_REMOVE)
 240             client_set_sticky(globalconf.L, -1, false);
 241         else if(set == _NET_WM_STATE_ADD)
 242             client_set_sticky(globalconf.L, -1, true);
 243         else if(set == _NET_WM_STATE_TOGGLE)
 244             client_set_sticky(globalconf.L, -1, !c->sticky);
 245     }
 246     else if(state == _NET_WM_STATE_SKIP_TASKBAR)
 247     {
 248         if(set == _NET_WM_STATE_REMOVE)
 249         {
 250             client_set_skip_taskbar(globalconf.L, -1, false);
 251             ewmh_client_update_hints(c);
 252         }
 253         else if(set == _NET_WM_STATE_ADD)
 254         {
 255             client_set_skip_taskbar(globalconf.L, -1, true);
 256             ewmh_client_update_hints(c);
 257         }
 258         else if(set == _NET_WM_STATE_TOGGLE)
 259         {
 260             client_set_skip_taskbar(globalconf.L, -1, !c->skip_taskbar);
 261             ewmh_client_update_hints(c);
 262         }
 263     }
 264     else if(state == _NET_WM_STATE_FULLSCREEN)
 265     {
 266         if(set == _NET_WM_STATE_REMOVE)
 267             client_set_fullscreen(globalconf.L, -1, false);
 268         else if(set == _NET_WM_STATE_ADD)
 269             client_set_fullscreen(globalconf.L, -1, true);
 270         else if(set == _NET_WM_STATE_TOGGLE)
 271             client_set_fullscreen(globalconf.L, -1, !c->fullscreen);
 272     }
 273     else if(state == _NET_WM_STATE_MAXIMIZED_HORZ)
 274     {
 275         if(set == _NET_WM_STATE_REMOVE)
 276             client_set_maximized_horizontal(globalconf.L, -1, false);
 277         else if(set == _NET_WM_STATE_ADD)
 278             client_set_maximized_horizontal(globalconf.L, -1, true);
 279         else if(set == _NET_WM_STATE_TOGGLE)
 280             client_set_maximized_horizontal(globalconf.L, -1, !c->maximized_horizontal);
 281     }
 282     else if(state == _NET_WM_STATE_MAXIMIZED_VERT)
 283     {
 284         if(set == _NET_WM_STATE_REMOVE)
 285             client_set_maximized_vertical(globalconf.L, -1, false);
 286         else if(set == _NET_WM_STATE_ADD)
 287             client_set_maximized_vertical(globalconf.L, -1, true);
 288         else if(set == _NET_WM_STATE_TOGGLE)
 289             client_set_maximized_vertical(globalconf.L, -1, !c->maximized_vertical);
 290     }
 291     else if(state == _NET_WM_STATE_ABOVE)
 292     {
 293         if(set == _NET_WM_STATE_REMOVE)
 294             client_set_above(globalconf.L, -1, false);
 295         else if(set == _NET_WM_STATE_ADD)
 296             client_set_above(globalconf.L, -1, true);
 297         else if(set == _NET_WM_STATE_TOGGLE)
 298             client_set_above(globalconf.L, -1, !c->above);
 299     }
 300     else if(state == _NET_WM_STATE_BELOW)
 301     {
 302         if(set == _NET_WM_STATE_REMOVE)
 303             client_set_below(globalconf.L, -1, false);
 304         else if(set == _NET_WM_STATE_ADD)
 305             client_set_below(globalconf.L, -1, true);
 306         else if(set == _NET_WM_STATE_TOGGLE)
 307             client_set_below(globalconf.L, -1, !c->below);
 308     }
 309     else if(state == _NET_WM_STATE_MODAL)
 310     {
 311         if(set == _NET_WM_STATE_REMOVE)
 312             client_set_modal(globalconf.L, -1, false);
 313         else if(set == _NET_WM_STATE_ADD)
 314             client_set_modal(globalconf.L, -1, true);
 315         else if(set == _NET_WM_STATE_TOGGLE)
 316             client_set_modal(globalconf.L, -1, !c->modal);
 317     }
 318     else if(state == _NET_WM_STATE_HIDDEN)
 319     {
 320         if(set == _NET_WM_STATE_REMOVE)
 321             client_set_minimized(globalconf.L, -1, false);
 322         else if(set == _NET_WM_STATE_ADD)
 323             client_set_minimized(globalconf.L, -1, true);
 324         else if(set == _NET_WM_STATE_TOGGLE)
 325             client_set_minimized(globalconf.L, -1, !c->minimized);
 326     }
 327     else if(state == _NET_WM_STATE_DEMANDS_ATTENTION)
 328     {
 329         if(set == _NET_WM_STATE_REMOVE)
 330             client_set_urgent(globalconf.L, -1, false);
 331         else if(set == _NET_WM_STATE_ADD)
 332             client_set_urgent(globalconf.L, -1, true);
 333         else if(set == _NET_WM_STATE_TOGGLE)
 334             client_set_urgent(globalconf.L, -1, !c->urgent);
 335     }
 336
 337     lua_pop(globalconf.L, 1);
 338 }
 339
 340 int
 341 ewmh_process_client_message(xcb_client_message_event_t *ev)
 342 {
 343     client_t *c;
 344     int screen;
 345
 346     if(ev->type == _NET_CURRENT_DESKTOP)
 347         for(screen = 0;
 348             screen < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
 349             screen++)
 350         {
 351             if(ev->window == xutil_screen_get(globalconf.connection, screen)->root)
 352                 tag_view_only_byindex(&globalconf.screens.tab[screen], ev->data.data32[0]);
 353         }
 354     else if(ev->type == _NET_CLOSE_WINDOW)
 355     {
 356         if((c = client_getbywin(ev->window)))
 357            client_kill(c);
 358     }
 359     else if(ev->type == _NET_WM_DESKTOP)
 360     {
 361         if((c = client_getbywin(ev->window)))
 362         {
 363             tag_array_t *tags = &c->screen->tags;
 364
 365             if(ev->data.data32[0] == 0xffffffff)
 366                 c->sticky = true;
 367             else
 368                 for(int i = 0; i < tags->len; i++)
 369                     if((int)ev->data.data32[0] == i)
 370                     {
 371                         luaA_object_push(globalconf.L, tags->tab[i]);
 372                         tag_client(c);
 373                     }
 374                     else
 375                         untag_client(c, tags->tab[i]);
 376         }
 377     }
 378     else if(ev->type == _NET_WM_STATE)
 379     {
 380         if((c = client_getbywin(ev->window)))
 381         {
 382             ewmh_process_state_atom(c, (xcb_atom_t) ev->data.data32[1], ev->data.data32[0]);
 383             if(ev->data.data32[2])
 384                 ewmh_process_state_atom(c, (xcb_atom_t) ev->data.data32[2],
 385                                         ev->data.data32[0]);
 386         }
 387     }
 388     else if(ev->type == _NET_ACTIVE_WINDOW)
 389     {
 390         if((c = client_getbywin(ev->window)))
 391             client_focus(c);
 392     }
 393
 394     return 0;
 395 }
 396
 397 /** Update client EWMH hints.
 398  * \param c The client.
 399  */
 400 void
 401 ewmh_client_update_hints(client_t *c)
 402 {
 403     xcb_atom_t state[10]; /* number of defined state atoms */
 404     int i = 0;
 405
 406     if(c->modal)
 407         state[i++] = _NET_WM_STATE_MODAL;
 408     if(c->fullscreen)
 409         state[i++] = _NET_WM_STATE_FULLSCREEN;
 410     if(c->maximized_vertical)
 411         state[i++] = _NET_WM_STATE_MAXIMIZED_VERT;
 412     if(c->maximized_horizontal)
 413         state[i++] = _NET_WM_STATE_MAXIMIZED_HORZ;
 414     if(c->sticky)
 415         state[i++] = _NET_WM_STATE_STICKY;
 416     if(c->skip_taskbar)
 417         state[i++] = _NET_WM_STATE_SKIP_TASKBAR;
 418     if(c->above)
 419         state[i++] = _NET_WM_STATE_ABOVE;
 420     if(c->below)
 421         state[i++] = _NET_WM_STATE_BELOW;
 422     if(c->minimized)
 423         state[i++] = _NET_WM_STATE_HIDDEN;
 424     if(c->urgent)
 425         state[i++] = _NET_WM_STATE_DEMANDS_ATTENTION;
 426
 427     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 428                         c->window, _NET_WM_STATE, XCB_ATOM_ATOM, 32, i, state);
 429 }
 430
 431 /** Update the client active desktop.
 432  * This is "wrong" since it can be on several tags, but EWMH has a strict view
 433  * of desktop system so just take the first tag.
 434  * \param c The client.
 435  */
 436 void
 437 ewmh_client_update_desktop(client_t *c)
 438 {
 439     int i;
 440     tag_array_t *tags = &c->screen->tags;
 441
 442     for(i = 0; i < tags->len; i++)
 443         if(is_client_tagged(c, tags->tab[i]))
 444         {
 445             xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 446                                 c->window, _NET_WM_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &i);
 447             return;
 448         }
 449     /* It doesn't have any tags, remove the property */
 450     xcb_delete_property(globalconf.connection, c->window, _NET_WM_DESKTOP);
 451 }
 452
 453 /** Update the client struts.
 454  * \param window The window to update the struts for.
 455  * \param strut The strut type to update the window with.
 456  */
 457 void
 458 ewmh_update_strut(xcb_window_t window, strut_t *strut)
 459 {
 460     const uint32_t state[] =
 461     {
 462         strut->left,
 463         strut->right,
 464         strut->top,
 465         strut->bottom,
 466         strut->left_start_y,
 467         strut->left_end_y,
 468         strut->right_start_y,
 469         strut->right_end_y,
 470         strut->top_start_x,
 471         strut->top_end_x,
 472         strut->bottom_start_x,
 473         strut->bottom_end_x
 474     };
 475
 476     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 477                         window, _NET_WM_STRUT_PARTIAL, XCB_ATOM_CARDINAL, 32, countof(state), state);
 478 }
 479
 480 void
 481 ewmh_client_check_hints(client_t *c)
 482 {
 483     xcb_atom_t *state;
 484     void *data = NULL;
 485     int desktop;
 486     xcb_get_property_cookie_t c0, c1, c2;
 487     xcb_get_property_reply_t *reply;
 488
 489     /* Send the GetProperty requests which will be processed later */
 490     c0 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 491                                     _NET_WM_DESKTOP, XCB_GET_PROPERTY_TYPE_ANY, 0, 1);
 492
 493     c1 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 494                                     _NET_WM_STATE, XCB_ATOM_ATOM, 0, UINT32_MAX);
 495
 496     c2 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 497                                     _NET_WM_WINDOW_TYPE, XCB_ATOM_ATOM, 0, UINT32_MAX);
 498
 499     reply = xcb_get_property_reply(globalconf.connection, c0, NULL);
 500     if(reply && reply->value_len && (data = xcb_get_property_value(reply)))
 501     {
 502         tag_array_t *tags = &c->screen->tags;
 503
 504         desktop = *(uint32_t *) data;
 505         if(desktop == -1)
 506             c->sticky = true;
 507         else if (desktop >= 0 && desktop < tags->len)
 508             for(int i = 0; i < tags->len; i++)
 509                 if(desktop == i)
 510                 {
 511                     luaA_object_push(globalconf.L, tags->tab[i]);
 512                     tag_client(c);
 513                 }
 514                 else
 515                     untag_client(c, tags->tab[i]);
 516         else
 517             /* Value out of bounds, just give it the first tag */
 518             if (tags->len > 0)
 519             {
 520                 luaA_object_push(globalconf.L, tags->tab[0]);
 521                 tag_client(c);
 522             }
 523     }
 524
 525     p_delete(&reply);
 526
 527     reply = xcb_get_property_reply(globalconf.connection, c1, NULL);
 528     if(reply && (data = xcb_get_property_value(reply)))
 529     {
 530         state = (xcb_atom_t *) data;
 531         for(int i = 0; i < xcb_get_property_value_length(reply) / ssizeof(xcb_atom_t); i++)
 532             ewmh_process_state_atom(c, state[i], _NET_WM_STATE_ADD);
 533     }
 534
 535     p_delete(&reply);
 536
 537     reply = xcb_get_property_reply(globalconf.connection, c2, NULL);
 538     if(reply && (data = xcb_get_property_value(reply)))
 539     {
 540         state = (xcb_atom_t *) data;
 541         for(int i = 0; i < xcb_get_property_value_length(reply) / ssizeof(xcb_atom_t); i++)
 542             if(state[i] == _NET_WM_WINDOW_TYPE_DESKTOP)
 543                 c->type = MAX(c->type, WINDOW_TYPE_DESKTOP);
 544             else if(state[i] == _NET_WM_WINDOW_TYPE_DIALOG)
 545                 c->type = MAX(c->type, WINDOW_TYPE_DIALOG);
 546             else if(state[i] == _NET_WM_WINDOW_TYPE_SPLASH)
 547                 c->type = MAX(c->type, WINDOW_TYPE_SPLASH);
 548             else if(state[i] == _NET_WM_WINDOW_TYPE_DOCK)
 549                 c->type = MAX(c->type, WINDOW_TYPE_DOCK);
 550             else if(state[i] == _NET_WM_WINDOW_TYPE_MENU)
 551                 c->type = MAX(c->type, WINDOW_TYPE_MENU);
 552             else if(state[i] == _NET_WM_WINDOW_TYPE_TOOLBAR)
 553                 c->type = MAX(c->type, WINDOW_TYPE_TOOLBAR);
 554             else if(state[i] == _NET_WM_WINDOW_TYPE_UTILITY)
 555                 c->type = MAX(c->type, WINDOW_TYPE_UTILITY);
 556     }
 557
 558     p_delete(&reply);
 559 }
 560
 561 /** Process the WM strut of a client.
 562  * \param c The client.
 563  * \param strut_r (Optional) An existing reply.
 564  */
 565 void
 566 ewmh_process_client_strut(client_t *c, xcb_get_property_reply_t *strut_r)
 567 {
 568     void *data;
 569     xcb_get_property_reply_t *mstrut_r = NULL;
 570
 571     if(!strut_r)
 572     {
 573         xcb_get_property_cookie_t strut_q = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 574                                                                        _NET_WM_STRUT_PARTIAL, XCB_ATOM_CARDINAL, 0, 12);
 575         strut_r = mstrut_r = xcb_get_property_reply(globalconf.connection, strut_q, NULL);
 576     }
 577
 578     if(strut_r
 579        && strut_r->value_len
 580        && (data = xcb_get_property_value(strut_r)))
 581     {
 582         uint32_t *strut = data;
 583
 584         if(c->strut.left != strut[0]
 585            || c->strut.right != strut[1]
 586            || c->strut.top != strut[2]
 587            || c->strut.bottom != strut[3]
 588            || c->strut.left_start_y != strut[4]
 589            || c->strut.left_end_y != strut[5]
 590            || c->strut.right_start_y != strut[6]
 591            || c->strut.right_end_y != strut[7]
 592            || c->strut.top_start_x != strut[8]
 593            || c->strut.top_end_x != strut[9]
 594            || c->strut.bottom_start_x != strut[10]
 595            || c->strut.bottom_end_x != strut[11])
 596         {
 597             c->strut.left = strut[0];
 598             c->strut.right = strut[1];
 599             c->strut.top = strut[2];
 600             c->strut.bottom = strut[3];
 601             c->strut.left_start_y = strut[4];
 602             c->strut.left_end_y = strut[5];
 603             c->strut.right_start_y = strut[6];
 604             c->strut.right_end_y = strut[7];
 605             c->strut.top_start_x = strut[8];
 606             c->strut.top_end_x = strut[9];
 607             c->strut.bottom_start_x = strut[10];
 608             c->strut.bottom_end_x = strut[11];
 609
 610             hook_property(c, "struts");
 611             luaA_object_push(globalconf.L, c);
 612             luaA_object_emit_signal(globalconf.L, -1, "property::struts", 0);
 613             lua_pop(globalconf.L, 1);
 614         }
 615     }
 616
 617     p_delete(&mstrut_r);
 618 }
 619
 620 /** Send request to get NET_WM_ICON (EWMH)
 621  * \param w The window.
 622  * \return The cookie associated with the request.
 623  */
 624 xcb_get_property_cookie_t
 625 ewmh_window_icon_get_unchecked(xcb_window_t w)
 626 {
 627   return xcb_get_property_unchecked(globalconf.connection, false, w,
 628                                     _NET_WM_ICON, XCB_ATOM_CARDINAL, 0, UINT32_MAX);
 629 }
 630
 631 int
 632 ewmh_window_icon_from_reply(xcb_get_property_reply_t *r)
 633 {
 634     uint32_t *data;
 635     uint64_t len;
 636
 637     if(!r || r->type != XCB_ATOM_CARDINAL || r->format != 32 || r->length < 2)
 638         return 0;
 639
 640     data = (uint32_t *) xcb_get_property_value(r);
 641     if (!data)
 642         return 0;
 643
 644     /* Check that the property is as long as it should be, handling integer
 645      * overflow. <uint32_t> times <another uint32_t casted to uint64_t> always
 646      * fits into an uint64_t and thus this multiplication cannot overflow.
 647      */
 648     len = data[0] * (uint64_t) data[1];
 649     if (!data[0] || !data[1] || len > r->length - 2)
 650         return 0;
 651
 652     return image_new_from_argb32(data[0], data[1], data + 2);
 653 }
 654
 655 /** Get NET_WM_ICON.
 656  * \param cookie The cookie.
 657  * \return The number of elements on stack.
 658  */
 659 int
 660 ewmh_window_icon_get_reply(xcb_get_property_cookie_t cookie)
 661 {
 662     xcb_get_property_reply_t *r = xcb_get_property_reply(globalconf.connection, cookie, NULL);
 663     int ret = ewmh_window_icon_from_reply(r);
 664     p_delete(&r);
 665     return ret;
 666 }
 667
 668 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80