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 /** Update the desktop geometry.
  79  */
  80 static void
  81 ewmh_update_desktop_geometry(void)
  82 {
  83     area_t geom = screen_area_get(&globalconf.screens.tab[0], false);
  84     uint32_t sizes[] = { geom.width, geom.height };
  85
  86     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
  87                         globalconf.screen->root,
  88                         _NET_DESKTOP_GEOMETRY, XCB_ATOM_CARDINAL, 32, countof(sizes), sizes);
  89 }
  90
  91 static int
  92 ewmh_update_net_active_window(lua_State *L)
  93 {
  94     xcb_window_t win;
  95
  96     if(globalconf.focus.client)
  97         win = globalconf.focus.client->window;
  98     else
  99         win = XCB_NONE;
 100
 101     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 102                         globalconf.screen->root,
 103                         _NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &win);
 104
 105     return 0;
 106 }
 107
 108 static int
 109 ewmh_update_net_client_list(lua_State *L)
 110 {
 111     xcb_window_t *wins = p_alloca(xcb_window_t, globalconf.clients.len);
 112
 113     int n = 0;
 114     foreach(client, globalconf.clients)
 115         wins[n++] = (*client)->window;
 116
 117     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 118                         globalconf.screen->root,
 119                         _NET_CLIENT_LIST, XCB_ATOM_WINDOW, 32, n, wins);
 120
 121     return 0;
 122 }
 123
 124 void
 125 ewmh_init(void)
 126 {
 127     xcb_window_t father;
 128     xcb_screen_t *xscreen = globalconf.screen;
 129     xcb_atom_t atom[] =
 130     {
 131         _NET_SUPPORTED,
 132         _NET_SUPPORTING_WM_CHECK,
 133         _NET_STARTUP_ID,
 134         _NET_CLIENT_LIST,
 135         _NET_CLIENT_LIST_STACKING,
 136         _NET_NUMBER_OF_DESKTOPS,
 137         _NET_CURRENT_DESKTOP,
 138         _NET_DESKTOP_NAMES,
 139         _NET_ACTIVE_WINDOW,
 140         _NET_DESKTOP_GEOMETRY,
 141         _NET_CLOSE_WINDOW,
 142         _NET_WM_NAME,
 143         _NET_WM_STRUT_PARTIAL,
 144         _NET_WM_ICON_NAME,
 145         _NET_WM_VISIBLE_ICON_NAME,
 146         _NET_WM_DESKTOP,
 147         _NET_WM_WINDOW_TYPE,
 148         _NET_WM_WINDOW_TYPE_DESKTOP,
 149         _NET_WM_WINDOW_TYPE_DOCK,
 150         _NET_WM_WINDOW_TYPE_TOOLBAR,
 151         _NET_WM_WINDOW_TYPE_MENU,
 152         _NET_WM_WINDOW_TYPE_UTILITY,
 153         _NET_WM_WINDOW_TYPE_SPLASH,
 154         _NET_WM_WINDOW_TYPE_DIALOG,
 155         _NET_WM_WINDOW_TYPE_DROPDOWN_MENU,
 156         _NET_WM_WINDOW_TYPE_POPUP_MENU,
 157         _NET_WM_WINDOW_TYPE_TOOLTIP,
 158         _NET_WM_WINDOW_TYPE_NOTIFICATION,
 159         _NET_WM_WINDOW_TYPE_COMBO,
 160         _NET_WM_WINDOW_TYPE_DND,
 161         _NET_WM_WINDOW_TYPE_NORMAL,
 162         _NET_WM_ICON,
 163         _NET_WM_PID,
 164         _NET_WM_STATE,
 165         _NET_WM_STATE_STICKY,
 166         _NET_WM_STATE_SKIP_TASKBAR,
 167         _NET_WM_STATE_FULLSCREEN,
 168         _NET_WM_STATE_MAXIMIZED_HORZ,
 169         _NET_WM_STATE_MAXIMIZED_VERT,
 170         _NET_WM_STATE_ABOVE,
 171         _NET_WM_STATE_BELOW,
 172         _NET_WM_STATE_MODAL,
 173         _NET_WM_STATE_HIDDEN,
 174         _NET_WM_STATE_DEMANDS_ATTENTION
 175     };
 176     int i;
 177
 178     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 179                         xscreen->root, _NET_SUPPORTED, XCB_ATOM_ATOM, 32,
 180                         countof(atom), atom);
 181
 182     /* create our own window */
 183     father = xcb_generate_id(globalconf.connection);
 184     xcb_create_window(globalconf.connection, xscreen->root_depth,
 185                       father, xscreen->root, -1, -1, 1, 1, 0,
 186                       XCB_COPY_FROM_PARENT, xscreen->root_visual, 0, NULL);
 187
 188     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 189                         xscreen->root, _NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32,
 190                         1, &father);
 191
 192     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 193                         father, _NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32,
 194                         1, &father);
 195
 196     /* set the window manager name */
 197     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 198                         father, _NET_WM_NAME, UTF8_STRING, 8, 7, "awesome");
 199
 200     /* set the window manager PID */
 201     i = getpid();
 202     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 203                         father, _NET_WM_PID, XCB_ATOM_CARDINAL, 32, 1, &i);
 204
 205     ewmh_update_desktop_geometry();
 206
 207     luaA_class_connect_signal(globalconf.L, &client_class, "focus", ewmh_update_net_active_window);
 208     luaA_class_connect_signal(globalconf.L, &client_class, "unfocus", ewmh_update_net_active_window);
 209     luaA_class_connect_signal(globalconf.L, &client_class, "manage", ewmh_update_net_client_list);
 210     luaA_class_connect_signal(globalconf.L, &client_class, "unmanage", ewmh_update_net_client_list);
 211     luaA_class_connect_signal(globalconf.L, &client_class, "property::modal" , ewmh_client_update_hints);
 212     luaA_class_connect_signal(globalconf.L, &client_class, "property::fullscreen" , ewmh_client_update_hints);
 213     luaA_class_connect_signal(globalconf.L, &client_class, "property::maximized_horizontal" , ewmh_client_update_hints);
 214     luaA_class_connect_signal(globalconf.L, &client_class, "property::maximized_vertical" , ewmh_client_update_hints);
 215     luaA_class_connect_signal(globalconf.L, &client_class, "property::sticky" , ewmh_client_update_hints);
 216     luaA_class_connect_signal(globalconf.L, &client_class, "property::skip_taskbar" , ewmh_client_update_hints);
 217     luaA_class_connect_signal(globalconf.L, &client_class, "property::above" , ewmh_client_update_hints);
 218     luaA_class_connect_signal(globalconf.L, &client_class, "property::below" , ewmh_client_update_hints);
 219     luaA_class_connect_signal(globalconf.L, &client_class, "property::minimized" , ewmh_client_update_hints);
 220     luaA_class_connect_signal(globalconf.L, &client_class, "property::urgent" , ewmh_client_update_hints);
 221 }
 222
 223 /** Set the client list in stacking order, bottom to top.
 224  */
 225 void
 226 ewmh_update_net_client_list_stacking(void)
 227 {
 228     int n = 0;
 229     xcb_window_t *wins = p_alloca(xcb_window_t, globalconf.stack.len);
 230
 231     foreach(client, globalconf.stack)
 232         wins[n++] = (*client)->window;
 233
 234     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 235                         globalconf.screen->root,
 236                         _NET_CLIENT_LIST_STACKING, XCB_ATOM_WINDOW, 32, n, wins);
 237 }
 238
 239 void
 240 ewmh_update_net_numbers_of_desktop(void)
 241 {
 242     uint32_t count = globalconf.tags.len;
 243
 244     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 245                         globalconf.screen->root,
 246                         _NET_NUMBER_OF_DESKTOPS, XCB_ATOM_CARDINAL, 32, 1, &count);
 247 }
 248
 249 void
 250 ewmh_update_net_current_desktop(void)
 251 {
 252     uint32_t idx = tags_get_first_selected_index();
 253
 254     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 255                         globalconf.screen->root,
 256                         _NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
 257 }
 258
 259 void
 260 ewmh_update_net_desktop_names(void)
 261 {
 262     buffer_t buf;
 263
 264     buffer_inita(&buf, BUFSIZ);
 265
 266     foreach(tag, globalconf.tags)
 267     {
 268         buffer_adds(&buf, tag_get_name(*tag));
 269         buffer_addc(&buf, '\0');
 270     }
 271
 272     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 273                         globalconf.screen->root,
 274                         _NET_DESKTOP_NAMES, UTF8_STRING, 8, buf.len, buf.s);
 275     buffer_wipe(&buf);
 276 }
 277
 278 static void
 279 ewmh_process_state_atom(client_t *c, xcb_atom_t state, int set)
 280 {
 281     luaA_object_push(globalconf.L, c);
 282
 283     if(state == _NET_WM_STATE_STICKY)
 284     {
 285         if(set == _NET_WM_STATE_REMOVE)
 286             client_set_sticky(globalconf.L, -1, false);
 287         else if(set == _NET_WM_STATE_ADD)
 288             client_set_sticky(globalconf.L, -1, true);
 289         else if(set == _NET_WM_STATE_TOGGLE)
 290             client_set_sticky(globalconf.L, -1, !c->sticky);
 291     }
 292     else if(state == _NET_WM_STATE_SKIP_TASKBAR)
 293     {
 294         if(set == _NET_WM_STATE_REMOVE)
 295             client_set_skip_taskbar(globalconf.L, -1, false);
 296         else if(set == _NET_WM_STATE_ADD)
 297             client_set_skip_taskbar(globalconf.L, -1, true);
 298         else if(set == _NET_WM_STATE_TOGGLE)
 299             client_set_skip_taskbar(globalconf.L, -1, !c->skip_taskbar);
 300     }
 301     else if(state == _NET_WM_STATE_FULLSCREEN)
 302     {
 303         if(set == _NET_WM_STATE_REMOVE)
 304             client_set_fullscreen(globalconf.L, -1, false);
 305         else if(set == _NET_WM_STATE_ADD)
 306             client_set_fullscreen(globalconf.L, -1, true);
 307         else if(set == _NET_WM_STATE_TOGGLE)
 308             client_set_fullscreen(globalconf.L, -1, !c->fullscreen);
 309     }
 310     else if(state == _NET_WM_STATE_MAXIMIZED_HORZ)
 311     {
 312         if(set == _NET_WM_STATE_REMOVE)
 313             client_set_maximized_horizontal(globalconf.L, -1, false);
 314         else if(set == _NET_WM_STATE_ADD)
 315             client_set_maximized_horizontal(globalconf.L, -1, true);
 316         else if(set == _NET_WM_STATE_TOGGLE)
 317             client_set_maximized_horizontal(globalconf.L, -1, !c->maximized_horizontal);
 318     }
 319     else if(state == _NET_WM_STATE_MAXIMIZED_VERT)
 320     {
 321         if(set == _NET_WM_STATE_REMOVE)
 322             client_set_maximized_vertical(globalconf.L, -1, false);
 323         else if(set == _NET_WM_STATE_ADD)
 324             client_set_maximized_vertical(globalconf.L, -1, true);
 325         else if(set == _NET_WM_STATE_TOGGLE)
 326             client_set_maximized_vertical(globalconf.L, -1, !c->maximized_vertical);
 327     }
 328     else if(state == _NET_WM_STATE_ABOVE)
 329     {
 330         if(set == _NET_WM_STATE_REMOVE)
 331             client_set_above(globalconf.L, -1, false);
 332         else if(set == _NET_WM_STATE_ADD)
 333             client_set_above(globalconf.L, -1, true);
 334         else if(set == _NET_WM_STATE_TOGGLE)
 335             client_set_above(globalconf.L, -1, !c->above);
 336     }
 337     else if(state == _NET_WM_STATE_BELOW)
 338     {
 339         if(set == _NET_WM_STATE_REMOVE)
 340             client_set_below(globalconf.L, -1, false);
 341         else if(set == _NET_WM_STATE_ADD)
 342             client_set_below(globalconf.L, -1, true);
 343         else if(set == _NET_WM_STATE_TOGGLE)
 344             client_set_below(globalconf.L, -1, !c->below);
 345     }
 346     else if(state == _NET_WM_STATE_MODAL)
 347     {
 348         if(set == _NET_WM_STATE_REMOVE)
 349             client_set_modal(globalconf.L, -1, false);
 350         else if(set == _NET_WM_STATE_ADD)
 351             client_set_modal(globalconf.L, -1, true);
 352         else if(set == _NET_WM_STATE_TOGGLE)
 353             client_set_modal(globalconf.L, -1, !c->modal);
 354     }
 355     else if(state == _NET_WM_STATE_HIDDEN)
 356     {
 357         if(set == _NET_WM_STATE_REMOVE)
 358             client_set_minimized(globalconf.L, -1, false);
 359         else if(set == _NET_WM_STATE_ADD)
 360             client_set_minimized(globalconf.L, -1, true);
 361         else if(set == _NET_WM_STATE_TOGGLE)
 362             client_set_minimized(globalconf.L, -1, !c->minimized);
 363     }
 364     else if(state == _NET_WM_STATE_DEMANDS_ATTENTION)
 365     {
 366         if(set == _NET_WM_STATE_REMOVE)
 367             client_set_urgent(globalconf.L, -1, false);
 368         else if(set == _NET_WM_STATE_ADD)
 369             client_set_urgent(globalconf.L, -1, true);
 370         else if(set == _NET_WM_STATE_TOGGLE)
 371             client_set_urgent(globalconf.L, -1, !c->urgent);
 372     }
 373
 374     lua_pop(globalconf.L, 1);
 375 }
 376
 377 int
 378 ewmh_process_client_message(xcb_client_message_event_t *ev)
 379 {
 380     client_t *c;
 381
 382     if(ev->type == _NET_CURRENT_DESKTOP)
 383         tag_view_only_byindex(ev->data.data32[0]);
 384     else if(ev->type == _NET_CLOSE_WINDOW)
 385     {
 386         if((c = client_getbywin(ev->window)))
 387            client_kill(c);
 388     }
 389     else if(ev->type == _NET_WM_DESKTOP)
 390     {
 391         if((c = client_getbywin(ev->window)))
 392         {
 393             if(ev->data.data32[0] == 0xffffffff)
 394                 c->sticky = true;
 395             else
 396                 for(int i = 0; i < globalconf.tags.len; i++)
 397                     if((int)ev->data.data32[0] == i)
 398                     {
 399                         luaA_object_push(globalconf.L, globalconf.tags.tab[i]);
 400                         tag_client(c);
 401                     }
 402                     else
 403                         untag_client(c, globalconf.tags.tab[i]);
 404         }
 405     }
 406     else if(ev->type == _NET_WM_STATE)
 407     {
 408         if((c = client_getbywin(ev->window)))
 409         {
 410             ewmh_process_state_atom(c, (xcb_atom_t) ev->data.data32[1], ev->data.data32[0]);
 411             if(ev->data.data32[2])
 412                 ewmh_process_state_atom(c, (xcb_atom_t) ev->data.data32[2],
 413                                         ev->data.data32[0]);
 414         }
 415     }
 416     else if(ev->type == _NET_ACTIVE_WINDOW)
 417     {
 418         if((c = client_getbywin(ev->window))) {
 419             client_focus(c);
 420             client_raise(c);
 421         }
 422     }
 423
 424     return 0;
 425 }
 426
 427 /** Update the client active desktop.
 428  * This is "wrong" since it can be on several tags, but EWMH has a strict view
 429  * of desktop system so just take the first tag.
 430  * \param c The client.
 431  */
 432 void
 433 ewmh_client_update_desktop(client_t *c)
 434 {
 435     int i;
 436
 437     for(i = 0; i < globalconf.tags.len; i++)
 438         if(is_client_tagged(c, globalconf.tags.tab[i]))
 439         {
 440             xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 441                                 c->window, _NET_WM_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &i);
 442             return;
 443         }
 444     /* It doesn't have any tags, remove the property */
 445     xcb_delete_property(globalconf.connection, c->window, _NET_WM_DESKTOP);
 446 }
 447
 448 /** Update the client struts.
 449  * \param window The window to update the struts for.
 450  * \param strut The strut type to update the window with.
 451  */
 452 void
 453 ewmh_update_strut(xcb_window_t window, strut_t *strut)
 454 {
 455     if(window)
 456     {
 457         const uint32_t state[] =
 458         {
 459             strut->left,
 460             strut->right,
 461             strut->top,
 462             strut->bottom,
 463             strut->left_start_y,
 464             strut->left_end_y,
 465             strut->right_start_y,
 466             strut->right_end_y,
 467             strut->top_start_x,
 468             strut->top_end_x,
 469             strut->bottom_start_x,
 470             strut->bottom_end_x
 471         };
 472
 473         xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 474                             window, _NET_WM_STRUT_PARTIAL, XCB_ATOM_CARDINAL, 32, countof(state), state);
 475     }
 476 }
 477
 478 /** Update the window type.
 479  * \param window The window to update.
 480  * \param type The new type to set.
 481  */
 482 void
 483 ewmh_update_window_type(xcb_window_t window, uint32_t type)
 484 {
 485     xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE,
 486                         window, _NET_WM_WINDOW_TYPE, XCB_ATOM_ATOM, 32, 1, &type);
 487 }
 488
 489 void
 490 ewmh_client_check_hints(client_t *c)
 491 {
 492     xcb_atom_t *state;
 493     void *data = NULL;
 494     int desktop;
 495     xcb_get_property_cookie_t c0, c1, c2;
 496     xcb_get_property_reply_t *reply;
 497
 498     /* Send the GetProperty requests which will be processed later */
 499     c0 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 500                                     _NET_WM_DESKTOP, XCB_GET_PROPERTY_TYPE_ANY, 0, 1);
 501
 502     c1 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 503                                     _NET_WM_STATE, XCB_ATOM_ATOM, 0, UINT32_MAX);
 504
 505     c2 = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 506                                     _NET_WM_WINDOW_TYPE, XCB_ATOM_ATOM, 0, UINT32_MAX);
 507
 508     reply = xcb_get_property_reply(globalconf.connection, c0, NULL);
 509     if(reply && reply->value_len && (data = xcb_get_property_value(reply)))
 510     {
 511         desktop = *(uint32_t *) data;
 512         if(desktop == -1)
 513             c->sticky = true;
 514         else if (desktop >= 0 && desktop < globalconf.tags.len)
 515             for(int i = 0; i < globalconf.tags.len; i++)
 516                 if(desktop == i)
 517                 {
 518                     luaA_object_push(globalconf.L, globalconf.tags.tab[i]);
 519                     tag_client(c);
 520                 }
 521                 else
 522                     untag_client(c, globalconf.tags.tab[i]);
 523         else
 524             /* Value out of bounds, just give it the first tag */
 525             if (globalconf.tags.len > 0)
 526             {
 527                 luaA_object_push(globalconf.L, globalconf.tags.tab[0]);
 528                 tag_client(c);
 529             }
 530     }
 531
 532     p_delete(&reply);
 533
 534     reply = xcb_get_property_reply(globalconf.connection, c1, NULL);
 535     if(reply && (data = xcb_get_property_value(reply)))
 536     {
 537         state = (xcb_atom_t *) data;
 538         for(int i = 0; i < xcb_get_property_value_length(reply) / ssizeof(xcb_atom_t); i++)
 539             ewmh_process_state_atom(c, state[i], _NET_WM_STATE_ADD);
 540     }
 541
 542     p_delete(&reply);
 543
 544     reply = xcb_get_property_reply(globalconf.connection, c2, NULL);
 545     if(reply && (data = xcb_get_property_value(reply)))
 546     {
 547         state = (xcb_atom_t *) data;
 548         for(int i = 0; i < xcb_get_property_value_length(reply) / ssizeof(xcb_atom_t); i++)
 549             if(state[i] == _NET_WM_WINDOW_TYPE_DESKTOP)
 550                 c->type = MAX(c->type, WINDOW_TYPE_DESKTOP);
 551             else if(state[i] == _NET_WM_WINDOW_TYPE_DIALOG)
 552                 c->type = MAX(c->type, WINDOW_TYPE_DIALOG);
 553             else if(state[i] == _NET_WM_WINDOW_TYPE_SPLASH)
 554                 c->type = MAX(c->type, WINDOW_TYPE_SPLASH);
 555             else if(state[i] == _NET_WM_WINDOW_TYPE_DOCK)
 556                 c->type = MAX(c->type, WINDOW_TYPE_DOCK);
 557             else if(state[i] == _NET_WM_WINDOW_TYPE_MENU)
 558                 c->type = MAX(c->type, WINDOW_TYPE_MENU);
 559             else if(state[i] == _NET_WM_WINDOW_TYPE_TOOLBAR)
 560                 c->type = MAX(c->type, WINDOW_TYPE_TOOLBAR);
 561             else if(state[i] == _NET_WM_WINDOW_TYPE_UTILITY)
 562                 c->type = MAX(c->type, WINDOW_TYPE_UTILITY);
 563     }
 564
 565     p_delete(&reply);
 566 }
 567
 568 /** Process the WM strut of a client.
 569  * \param c The client.
 570  * \param strut_r (Optional) An existing reply.
 571  */
 572 void
 573 ewmh_process_client_strut(client_t *c)
 574 {
 575     void *data;
 576     xcb_get_property_reply_t *strut_r;
 577
 578     xcb_get_property_cookie_t strut_q = xcb_get_property_unchecked(globalconf.connection, false, c->window,
 579                                                                    _NET_WM_STRUT_PARTIAL, XCB_ATOM_CARDINAL, 0, 12);
 580     strut_r = xcb_get_property_reply(globalconf.connection, strut_q, NULL);
 581
 582     if(strut_r
 583        && strut_r->value_len
 584        && (data = xcb_get_property_value(strut_r)))
 585     {
 586         uint32_t *strut = data;
 587
 588         if(c->strut.left != strut[0]
 589            || c->strut.right != strut[1]
 590            || c->strut.top != strut[2]
 591            || c->strut.bottom != strut[3]
 592            || c->strut.left_start_y != strut[4]
 593            || c->strut.left_end_y != strut[5]
 594            || c->strut.right_start_y != strut[6]
 595            || c->strut.right_end_y != strut[7]
 596            || c->strut.top_start_x != strut[8]
 597            || c->strut.top_end_x != strut[9]
 598            || c->strut.bottom_start_x != strut[10]
 599            || c->strut.bottom_end_x != strut[11])
 600         {
 601             c->strut.left = strut[0];
 602             c->strut.right = strut[1];
 603             c->strut.top = strut[2];
 604             c->strut.bottom = strut[3];
 605             c->strut.left_start_y = strut[4];
 606             c->strut.left_end_y = strut[5];
 607             c->strut.right_start_y = strut[6];
 608             c->strut.right_end_y = strut[7];
 609             c->strut.top_start_x = strut[8];
 610             c->strut.top_end_x = strut[9];
 611             c->strut.bottom_start_x = strut[10];
 612             c->strut.bottom_end_x = strut[11];
 613
 614             luaA_object_push(globalconf.L, c);
 615             luaA_object_emit_signal(globalconf.L, -1, "property::struts", 0);
 616             lua_pop(globalconf.L, 1);
 617         }
 618     }
 619
 620     p_delete(&strut_r);
 621 }
 622
 623 /** Send request to get NET_WM_ICON (EWMH)
 624  * \param w The window.
 625  * \return The cookie associated with the request.
 626  */
 627 xcb_get_property_cookie_t
 628 ewmh_window_icon_get_unchecked(xcb_window_t w)
 629 {
 630   return xcb_get_property_unchecked(globalconf.connection, false, w,
 631                                     _NET_WM_ICON, XCB_ATOM_CARDINAL, 0, UINT32_MAX);
 632 }
 633
 634 static cairo_surface_t *
 635 ewmh_window_icon_from_reply(xcb_get_property_reply_t *r)
 636 {
 637     uint32_t *data;
 638     uint64_t len;
 639
 640     if(!r || r->type != XCB_ATOM_CARDINAL || r->format != 32 || r->length < 2)
 641         return 0;
 642
 643     data = (uint32_t *) xcb_get_property_value(r);
 644     if (!data)
 645         return 0;
 646
 647     /* Check that the property is as long as it should be, handling integer
 648      * overflow. <uint32_t> times <another uint32_t casted to uint64_t> always
 649      * fits into an uint64_t and thus this multiplication cannot overflow.
 650      */
 651     len = data[0] * (uint64_t) data[1];
 652     if (!data[0] || !data[1] || len > r->length - 2)
 653         return 0;
 654
 655     return draw_surface_from_data(data[0], data[1], data + 2);
 656 }
 657
 658 /** Get NET_WM_ICON.
 659  * \param cookie The cookie.
 660  * \return The number of elements on stack.
 661  */
 662 cairo_surface_t *
 663 ewmh_window_icon_get_reply(xcb_get_property_cookie_t cookie)
 664 {
 665     xcb_get_property_reply_t *r = xcb_get_property_reply(globalconf.connection, cookie, NULL);
 666     cairo_surface_t *surface = ewmh_window_icon_from_reply(r);
 667     p_delete(&r);
 668     return surface;
 669 }
 670
 671 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80