event.c

   1 /*
   2  * event.c - event handlers
   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 <xcb/xcb.h>
  23 #include <xcb/randr.h>
  24 #include <xcb/xcb_atom.h>
  25 #include <xcb/xcb_icccm.h>
  26 #include <xcb/xcb_event.h>
  27
  28 #include "awesome.h"
  29 #include "event.h"
  30 #include "property.h"
  31 #include "objects/tag.h"
  32 #include "objects/drawin.h"
  33 #include "xwindow.h"
  34 #include "ewmh.h"
  35 #include "objects/client.h"
  36 #include "keyresolv.h"
  37 #include "keygrabber.h"
  38 #include "mousegrabber.h"
  39 #include "luaa.h"
  40 #include "systray.h"
  41 #include "screen.h"
  42 #include "common/atoms.h"
  43 #include "common/xutil.h"
  44
  45 #define DO_EVENT_HOOK_CALLBACK(type, xcbtype, xcbeventprefix, arraytype, match) \
  46     static void \
  47     event_##xcbtype##_callback(xcb_##xcbtype##_press_event_t *ev, \
  48                                arraytype *arr, \
  49                                int oud, \
  50                                int nargs, \
  51                                void *data) \
  52     { \
  53         int abs_oud = oud < 0 ? ((lua_gettop(globalconf.L) + 1) + oud) : oud; \
  54         int item_matching = 0; \
  55         foreach(item, *arr) \
  56             if(match(ev, *item, data)) \
  57             { \
  58                 if(oud) \
  59                     luaA_object_push_item(globalconf.L, abs_oud, *item); \
  60                 else \
  61                     luaA_object_push(globalconf.L, *item); \
  62                 item_matching++; \
  63             } \
  64         for(; item_matching > 0; item_matching--) \
  65         { \
  66             switch(ev->response_type) \
  67             { \
  68               case xcbeventprefix##_PRESS: \
  69                 for(int i = 0; i < nargs; i++) \
  70                     lua_pushvalue(globalconf.L, - nargs - item_matching); \
  71                 luaA_object_emit_signal(globalconf.L, - nargs - 1, "press", nargs); \
  72                 break; \
  73               case xcbeventprefix##_RELEASE: \
  74                 for(int i = 0; i < nargs; i++) \
  75                     lua_pushvalue(globalconf.L, - nargs - item_matching); \
  76                 luaA_object_emit_signal(globalconf.L, - nargs - 1, "release", nargs); \
  77                 break; \
  78             } \
  79             lua_pop(globalconf.L, 1); \
  80         } \
  81         lua_pop(globalconf.L, nargs); \
  82     }
  83
  84 static bool
  85 event_key_match(xcb_key_press_event_t *ev, keyb_t *k, void *data)
  86 {
  87     assert(data);
  88     xcb_keysym_t keysym = *(xcb_keysym_t *) data;
  89     return (((k->keycode && ev->detail == k->keycode)
  90              || (k->keysym && keysym == k->keysym))
  91             && (k->modifiers == XCB_BUTTON_MASK_ANY || k->modifiers == ev->state));
  92 }
  93
  94 static bool
  95 event_button_match(xcb_button_press_event_t *ev, button_t *b, void *data)
  96 {
  97     return ((!b->button || ev->detail == b->button)
  98             && (b->modifiers == XCB_BUTTON_MASK_ANY || b->modifiers == ev->state));
  99 }
 100
 101 DO_EVENT_HOOK_CALLBACK(button_t, button, XCB_BUTTON, button_array_t, event_button_match)
 102 DO_EVENT_HOOK_CALLBACK(keyb_t, key, XCB_KEY, key_array_t, event_key_match)
 103
 104 /** Handle an event with mouse grabber if needed
 105  * \param x The x coordinate.
 106  * \param y The y coordinate.
 107  * \param mask The mask buttons.
 108  * \return True if the event was handled.
 109  */
 110 static bool
 111 event_handle_mousegrabber(int x, int y, uint16_t mask)
 112 {
 113     if(globalconf.mousegrabber != LUA_REFNIL)
 114     {
 115         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.mousegrabber);
 116         mousegrabber_handleevent(globalconf.L, x, y, mask);
 117         if(lua_pcall(globalconf.L, 1, 1, 0))
 118         {
 119             warn("error running function: %s", lua_tostring(globalconf.L, -1));
 120             luaA_mousegrabber_stop(globalconf.L);
 121         }
 122         else if(!lua_isboolean(globalconf.L, -1) || !lua_toboolean(globalconf.L, -1))
 123             luaA_mousegrabber_stop(globalconf.L);
 124         lua_pop(globalconf.L, 1);  /* pop returned value */
 125         return true;
 126     }
 127     return false;
 128 }
 129
 130 /** Emit a button signal.
 131  * The top of the lua stack has to be the object on which to emit the event.
 132  * \param ev The event to handle.
 133  */
 134 static void
 135 event_emit_button(xcb_button_press_event_t *ev)
 136 {
 137     const char *name;
 138     switch(ev->response_type)
 139     {
 140     case XCB_BUTTON_PRESS:
 141         name = "button::press";
 142         break;
 143     case XCB_BUTTON_RELEASE:
 144         name = "button::release";
 145         break;
 146     default:
 147         fatal("Invalid event type");
 148     }
 149
 150     /* Push the event's info */
 151     lua_pushnumber(globalconf.L, ev->event_x);
 152     lua_pushnumber(globalconf.L, ev->event_y);
 153     lua_pushnumber(globalconf.L, ev->detail);
 154     luaA_pushmodifiers(globalconf.L, ev->state);
 155     /* And emit the signal */
 156     luaA_object_emit_signal(globalconf.L, -5, name, 4);
 157 }
 158
 159 /** The button press event handler.
 160  * \param ev The event.
 161  */
 162 static void
 163 event_handle_button(xcb_button_press_event_t *ev)
 164 {
 165     client_t *c;
 166     drawin_t *drawin;
 167
 168     globalconf.timestamp = ev->time;
 169
 170     if(event_handle_mousegrabber(ev->root_x, ev->root_y, 1 << (ev->detail - 1 + 8)))
 171         return;
 172
 173     /* ev->state is
 174      * button status (8 bits) + modifiers status (8 bits)
 175      * we don't care for button status that we get, especially on release, so
 176      * drop them */
 177     ev->state &= 0x00ff;
 178
 179     if((drawin = drawin_getbywin(ev->event))
 180        || (drawin = drawin_getbywin(ev->child)))
 181     {
 182         /* If the drawin is child, then x,y are
 183          * relative to root window */
 184         if(drawin->window == ev->child)
 185         {
 186             ev->event_x -= drawin->geometry.x;
 187             ev->event_y -= drawin->geometry.y;
 188         }
 189
 190         /* Push the drawin */
 191         luaA_object_push(globalconf.L, drawin);
 192         /* and handle the button raw button event */
 193         event_emit_button(ev);
 194         /* check if any button object matches */
 195         event_button_callback(ev, &drawin->buttons, -1, 1, NULL);
 196     }
 197     else if((c = client_getbyframewin(ev->event)))
 198     {
 199         luaA_object_push(globalconf.L, c);
 200         /* And handle the button raw button event */
 201         event_emit_button(ev);
 202         /* then check if any button objects match */
 203         event_button_callback(ev, &c->buttons, -1, 1, NULL);
 204         xcb_allow_events(globalconf.connection,
 205                          XCB_ALLOW_REPLAY_POINTER,
 206                          XCB_CURRENT_TIME);
 207     }
 208     else if(ev->child == XCB_NONE)
 209         if(globalconf.screen->root == ev->event)
 210         {
 211             event_button_callback(ev, &globalconf.buttons, 0, 0, NULL);
 212             return;
 213         }
 214 }
 215
 216 static void
 217 event_handle_configurerequest_configure_window(xcb_configure_request_event_t *ev)
 218 {
 219     uint16_t config_win_mask = 0;
 220     uint32_t config_win_vals[7];
 221     unsigned short i = 0;
 222
 223     if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 224     {
 225         config_win_mask |= XCB_CONFIG_WINDOW_X;
 226         config_win_vals[i++] = ev->x;
 227     }
 228     if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 229     {
 230         config_win_mask |= XCB_CONFIG_WINDOW_Y;
 231         config_win_vals[i++] = ev->y;
 232     }
 233     if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 234     {
 235         config_win_mask |= XCB_CONFIG_WINDOW_WIDTH;
 236         config_win_vals[i++] = ev->width;
 237     }
 238     if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 239     {
 240         config_win_mask |= XCB_CONFIG_WINDOW_HEIGHT;
 241         config_win_vals[i++] = ev->height;
 242     }
 243     if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 244     {
 245         config_win_mask |= XCB_CONFIG_WINDOW_BORDER_WIDTH;
 246         config_win_vals[i++] = ev->border_width;
 247     }
 248     if(ev->value_mask & XCB_CONFIG_WINDOW_SIBLING)
 249     {
 250         config_win_mask |= XCB_CONFIG_WINDOW_SIBLING;
 251         config_win_vals[i++] = ev->sibling;
 252     }
 253     if(ev->value_mask & XCB_CONFIG_WINDOW_STACK_MODE)
 254     {
 255         config_win_mask |= XCB_CONFIG_WINDOW_STACK_MODE;
 256         config_win_vals[i++] = ev->stack_mode;
 257     }
 258
 259     xcb_configure_window(globalconf.connection, ev->window, config_win_mask, config_win_vals);
 260 }
 261
 262 /** The configure event handler.
 263  * \param ev The event.
 264  */
 265 static void
 266 event_handle_configurerequest(xcb_configure_request_event_t *ev)
 267 {
 268     client_t *c;
 269
 270     if((c = client_getbywin(ev->window)))
 271     {
 272         area_t geometry = c->geometry;
 273
 274         if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 275             geometry.x = ev->x;
 276         if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 277             geometry.y = ev->y;
 278         if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 279             geometry.width = ev->width;
 280         if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 281             geometry.height = ev->height;
 282
 283         if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 284         {
 285             luaA_object_push(globalconf.L, c);
 286             window_set_border_width(globalconf.L, -1, ev->border_width);
 287             lua_pop(globalconf.L, 1);
 288         }
 289
 290         if(!client_resize(c, geometry, false))
 291             /* ICCCM 4.1.5 / 4.2.3, if nothing was changed, send an event saying so */
 292             xwindow_configure(c->window, geometry, c->border_width);
 293     }
 294     else
 295         event_handle_configurerequest_configure_window(ev);
 296 }
 297
 298 /** The configure notify event handler.
 299  * \param ev The event.
 300  */
 301 static void
 302 event_handle_configurenotify(xcb_configure_notify_event_t *ev)
 303 {
 304     const xcb_screen_t *screen = globalconf.screen;
 305
 306     if(ev->window == screen->root
 307        && (ev->width != screen->width_in_pixels
 308            || ev->height != screen->height_in_pixels))
 309         /* it's not that we panic, but restart */
 310         awesome_restart();
 311 }
 312
 313 /** The destroy notify event handler.
 314  * \param ev The event.
 315  */
 316 static void
 317 event_handle_destroynotify(xcb_destroy_notify_event_t *ev)
 318 {
 319     client_t *c;
 320
 321     if((c = client_getbywin(ev->window)))
 322         client_unmanage(c, false);
 323     else
 324         for(int i = 0; i < globalconf.embedded.len; i++)
 325             if(globalconf.embedded.tab[i].win == ev->window)
 326             {
 327                 xembed_window_array_take(&globalconf.embedded, i);
 328                 luaA_systray_invalidate();
 329             }
 330 }
 331
 332 /** The motion notify event handler.
 333  * \param ev The event.
 334  */
 335 static void
 336 event_handle_motionnotify(xcb_motion_notify_event_t *ev)
 337 {
 338     drawin_t *w;
 339     client_t *c;
 340
 341     globalconf.timestamp = ev->time;
 342
 343     if(event_handle_mousegrabber(ev->root_x, ev->root_y, ev->state))
 344         return;
 345
 346     if((c = client_getbyframewin(ev->event)))
 347     {
 348         luaA_object_push(globalconf.L, c);
 349         lua_pushnumber(globalconf.L, ev->event_x);
 350         lua_pushnumber(globalconf.L, ev->event_y);
 351         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 352         lua_pop(globalconf.L, 1);
 353     }
 354
 355     if((w = drawin_getbywin(ev->event)))
 356     {
 357         luaA_object_push(globalconf.L, w);
 358         lua_pushnumber(globalconf.L, ev->event_x);
 359         lua_pushnumber(globalconf.L, ev->event_y);
 360         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 361         lua_pop(globalconf.L, 1);
 362     }
 363 }
 364
 365 /** The leave notify event handler.
 366  * \param ev The event.
 367  */
 368 static void
 369 event_handle_leavenotify(xcb_leave_notify_event_t *ev)
 370 {
 371     drawin_t *drawin;
 372     client_t *c;
 373
 374     globalconf.timestamp = ev->time;
 375
 376     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 377         return;
 378
 379     if((c = client_getbyframewin(ev->event)))
 380     {
 381         luaA_object_push(globalconf.L, c);
 382         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 383         lua_pop(globalconf.L, 1);
 384     }
 385
 386     if((drawin = drawin_getbywin(ev->event)))
 387     {
 388         luaA_object_push(globalconf.L, drawin);
 389         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 390         lua_pop(globalconf.L, 1);
 391     }
 392 }
 393
 394 /** The enter notify event handler.
 395  * \param ev The event.
 396  */
 397 static void
 398 event_handle_enternotify(xcb_enter_notify_event_t *ev)
 399 {
 400     client_t *c;
 401     drawin_t *drawin;
 402
 403     globalconf.timestamp = ev->time;
 404
 405     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 406         return;
 407
 408     if((drawin = drawin_getbywin(ev->event)))
 409     {
 410         luaA_object_push(globalconf.L, drawin);
 411         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 412         lua_pop(globalconf.L, 1);
 413     }
 414
 415     if((c = client_getbyframewin(ev->event)))
 416     {
 417         luaA_object_push(globalconf.L, c);
 418         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 419         lua_pop(globalconf.L, 1);
 420     }
 421 }
 422
 423 /** The focus in event handler.
 424  * \param ev The event.
 425  */
 426 static void
 427 event_handle_focusin(xcb_focus_in_event_t *ev)
 428 {
 429     /* Events that we are interested in: */
 430     switch(ev->detail)
 431     {
 432         /* These are events that jump between root windows.
 433          */
 434         case XCB_NOTIFY_DETAIL_ANCESTOR:
 435         case XCB_NOTIFY_DETAIL_INFERIOR:
 436
 437         /* These are events that jump between clients.
 438          * Virtual events ensure we always get an event on our top-level window.
 439          */
 440         case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
 441         case XCB_NOTIFY_DETAIL_NONLINEAR:
 442           {
 443             client_t *c;
 444
 445             if((c = client_getbywin(ev->event)))
 446                 client_focus_update(c);
 447           }
 448         /* all other events are ignored */
 449         default:
 450             break;
 451     }
 452 }
 453
 454 /** The expose event handler.
 455  * \param ev The event.
 456  */
 457 static void
 458 event_handle_expose(xcb_expose_event_t *ev)
 459 {
 460     drawin_t *drawin;
 461
 462     if((drawin = drawin_getbywin(ev->window)))
 463         drawin_refresh_pixmap_partial(drawin,
 464                                       ev->x, ev->y,
 465                                       ev->width, ev->height);
 466 }
 467
 468 /** The key press event handler.
 469  * \param ev The event.
 470  */
 471 static void
 472 event_handle_key(xcb_key_press_event_t *ev)
 473 {
 474     globalconf.timestamp = ev->time;
 475
 476     if(globalconf.keygrabber != LUA_REFNIL)
 477     {
 478         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.keygrabber);
 479         if(keygrabber_handlekpress(globalconf.L, ev))
 480         {
 481             if(lua_pcall(globalconf.L, 3, 1, 0))
 482             {
 483                 warn("error running function: %s", lua_tostring(globalconf.L, -1));
 484                 luaA_keygrabber_stop(globalconf.L);
 485             }
 486             else if(!lua_isboolean(globalconf.L, -1) || !lua_toboolean(globalconf.L, -1))
 487                 luaA_keygrabber_stop(globalconf.L);
 488         }
 489         lua_pop(globalconf.L, 1);  /* pop returned value or function if not called */
 490     }
 491     else
 492     {
 493         /* get keysym ignoring all modifiers */
 494         xcb_keysym_t keysym = keyresolv_get_keysym(ev->detail, 0);
 495         client_t *c;
 496         if((c = client_getbyframewin(ev->event)))
 497         {
 498             luaA_object_push(globalconf.L, c);
 499             event_key_callback(ev, &c->keys, -1, 1, &keysym);
 500         }
 501         else
 502             event_key_callback(ev, &globalconf.keys, 0, 0, &keysym);
 503     }
 504 }
 505
 506 /** The map request event handler.
 507  * \param ev The event.
 508  */
 509 static void
 510 event_handle_maprequest(xcb_map_request_event_t *ev)
 511 {
 512     client_t *c;
 513     xcb_get_window_attributes_cookie_t wa_c;
 514     xcb_get_window_attributes_reply_t *wa_r;
 515     xcb_get_geometry_cookie_t geom_c;
 516     xcb_get_geometry_reply_t *geom_r;
 517
 518     wa_c = xcb_get_window_attributes_unchecked(globalconf.connection, ev->window);
 519
 520     if(!(wa_r = xcb_get_window_attributes_reply(globalconf.connection, wa_c, NULL)))
 521         return;
 522
 523     if(wa_r->override_redirect)
 524         goto bailout;
 525
 526     if(xembed_getbywin(&globalconf.embedded, ev->window))
 527     {
 528         xcb_map_window(globalconf.connection, ev->window);
 529         xembed_window_activate(globalconf.connection, ev->window);
 530     }
 531     else if((c = client_getbywin(ev->window)))
 532     {
 533         /* Check that it may be visible, but not asked to be hidden */
 534         if(client_maybevisible(c, c->screen) && !c->hidden)
 535         {
 536             luaA_object_push(globalconf.L, c);
 537             client_set_minimized(globalconf.L, -1, false);
 538             lua_pop(globalconf.L, 1);
 539             /* it will be raised, so just update ourself */
 540             client_raise(c);
 541         }
 542     }
 543     else
 544     {
 545         geom_c = xcb_get_geometry_unchecked(globalconf.connection, ev->window);
 546
 547         if(!(geom_r = xcb_get_geometry_reply(globalconf.connection, geom_c, NULL)))
 548         {
 549             goto bailout;
 550         }
 551
 552         client_manage(ev->window, geom_r, false);
 553
 554         p_delete(&geom_r);
 555     }
 556
 557 bailout:
 558     p_delete(&wa_r);
 559 }
 560
 561 /** The unmap notify event handler.
 562  * \param ev The event.
 563  */
 564 static void
 565 event_handle_unmapnotify(xcb_unmap_notify_event_t *ev)
 566 {
 567     client_t *c;
 568
 569     if((c = client_getbywin(ev->window)))
 570         client_unmanage(c, true);
 571     else
 572         for(int i = 0; i < globalconf.embedded.len; i++)
 573             if(globalconf.embedded.tab[i].win == ev->window)
 574             {
 575                 xembed_window_array_take(&globalconf.embedded, i);
 576                 xcb_change_save_set(globalconf.connection, XCB_SET_MODE_DELETE, ev->window);
 577                 luaA_systray_invalidate();
 578             }
 579 }
 580
 581 /** The randr screen change notify event handler.
 582  * \param ev The event.
 583  */
 584 static void
 585 event_handle_randr_screen_change_notify(xcb_randr_screen_change_notify_event_t *ev)
 586 {
 587     /* Code  of  XRRUpdateConfiguration Xlib  function  ported to  XCB
 588      * (only the code relevant  to RRScreenChangeNotify) as the latter
 589      * doesn't provide this kind of function */
 590     if(ev->rotation & (XCB_RANDR_ROTATION_ROTATE_90 | XCB_RANDR_ROTATION_ROTATE_270))
 591         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->height, ev->width,
 592                                   ev->mheight, ev->mwidth);
 593     else
 594         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->width, ev->height,
 595                                   ev->mwidth, ev->mheight);
 596
 597     /* XRRUpdateConfiguration also executes the following instruction
 598      * but it's not useful because SubpixelOrder is not used at all at
 599      * the moment
 600      *
 601      * XRenderSetSubpixelOrder(dpy, snum, scevent->subpixel_order);
 602      */
 603
 604     awesome_restart();
 605 }
 606
 607 /** The client message event handler.
 608  * \param ev The event.
 609  */
 610 static void
 611 event_handle_clientmessage(xcb_client_message_event_t *ev)
 612 {
 613     /* check for startup notification messages */
 614     if(sn_xcb_display_process_event(globalconf.sndisplay, (xcb_generic_event_t *) ev))
 615         return;
 616
 617     if(ev->type == WM_CHANGE_STATE)
 618     {
 619         client_t *c;
 620         if((c = client_getbywin(ev->window))
 621            && ev->format == 32
 622            && ev->data.data32[0] == XCB_WM_STATE_ICONIC)
 623         {
 624             luaA_object_push(globalconf.L, c);
 625             client_set_minimized(globalconf.L, -1, true);
 626             lua_pop(globalconf.L, 1);
 627         }
 628     }
 629     else if(ev->type == _XEMBED)
 630         xembed_process_client_message(ev);
 631     else if(ev->type == _NET_SYSTEM_TRAY_OPCODE)
 632         systray_process_client_message(ev);
 633     else
 634         ewmh_process_client_message(ev);
 635 }
 636
 637 /** The keymap change notify event handler.
 638  * \param ev The event.
 639  */
 640 static void
 641 event_handle_mappingnotify(xcb_mapping_notify_event_t *ev)
 642 {
 643     if(ev->request == XCB_MAPPING_MODIFIER
 644        || ev->request == XCB_MAPPING_KEYBOARD)
 645     {
 646         xcb_get_modifier_mapping_cookie_t xmapping_cookie =
 647             xcb_get_modifier_mapping_unchecked(globalconf.connection);
 648
 649         /* Free and then allocate the key symbols */
 650         xcb_key_symbols_free(globalconf.keysyms);
 651         globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
 652
 653         xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
 654                             globalconf.keysyms, &globalconf.numlockmask,
 655                             &globalconf.shiftlockmask, &globalconf.capslockmask,
 656                             &globalconf.modeswitchmask);
 657
 658         /* regrab everything */
 659         xcb_screen_t *s = globalconf.screen;
 660         /* yes XCB_BUTTON_MASK_ANY is also for grab_key even if it's look weird */
 661         xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, s->root, XCB_BUTTON_MASK_ANY);
 662         xwindow_grabkeys(s->root, &globalconf.keys);
 663
 664         foreach(_c, globalconf.clients)
 665         {
 666             client_t *c = *_c;
 667             xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, c->frame_window, XCB_BUTTON_MASK_ANY);
 668             xwindow_grabkeys(c->frame_window, &c->keys);
 669         }
 670     }
 671 }
 672
 673 static void
 674 event_handle_reparentnotify(xcb_reparent_notify_event_t *ev)
 675 {
 676     client_t *c;
 677
 678     if((c = client_getbywin(ev->window)) && c->frame_window != ev->parent)
 679     {
 680         /* Ignore reparents to the root window, they *might* be caused by
 681          * ourselves if a client quickly unmaps and maps itself again. */
 682         if (ev->parent != globalconf.screen->root)
 683             client_unmanage(c, true);
 684     }
 685 }
 686
 687 /** \brief awesome xerror function.
 688  * There's no way to check accesses to destroyed windows, thus those cases are
 689  * ignored (especially on UnmapNotify's).
 690  * \param e The error event.
 691  */
 692 static void
 693 xerror(xcb_generic_error_t *e)
 694 {
 695     /* ignore this */
 696     if(e->error_code == XCB_WINDOW
 697        || (e->error_code == XCB_MATCH
 698            && e->major_code == XCB_SET_INPUT_FOCUS)
 699        || (e->error_code == XCB_VALUE
 700            && e->major_code == XCB_KILL_CLIENT)
 701        || (e->error_code == XCB_MATCH
 702            && e->major_code == XCB_CONFIGURE_WINDOW))
 703         return;
 704
 705     warn("X error: request=%s, error=%s",
 706          xcb_event_get_request_label(e->major_code),
 707          xcb_event_get_error_label(e->error_code));
 708
 709     return;
 710 }
 711
 712 void event_handle(xcb_generic_event_t *event)
 713 {
 714     uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
 715
 716     if(response_type == 0)
 717     {
 718         /* This is an error, not a event */
 719         xerror((xcb_generic_error_t *) event);
 720         return;
 721     }
 722
 723     switch(response_type)
 724     {
 725 #define EVENT(type, callback) case type: callback((void *) event); return
 726         EVENT(XCB_BUTTON_PRESS, event_handle_button);
 727         EVENT(XCB_BUTTON_RELEASE, event_handle_button);
 728         EVENT(XCB_CONFIGURE_REQUEST, event_handle_configurerequest);
 729         EVENT(XCB_CONFIGURE_NOTIFY, event_handle_configurenotify);
 730         EVENT(XCB_DESTROY_NOTIFY, event_handle_destroynotify);
 731         EVENT(XCB_ENTER_NOTIFY, event_handle_enternotify);
 732         EVENT(XCB_CLIENT_MESSAGE, event_handle_clientmessage);
 733         EVENT(XCB_EXPOSE, event_handle_expose);
 734         EVENT(XCB_FOCUS_IN, event_handle_focusin);
 735         EVENT(XCB_KEY_PRESS, event_handle_key);
 736         EVENT(XCB_KEY_RELEASE, event_handle_key);
 737         EVENT(XCB_LEAVE_NOTIFY, event_handle_leavenotify);
 738         EVENT(XCB_MAPPING_NOTIFY, event_handle_mappingnotify);
 739         EVENT(XCB_MAP_REQUEST, event_handle_maprequest);
 740         EVENT(XCB_MOTION_NOTIFY, event_handle_motionnotify);
 741         EVENT(XCB_PROPERTY_NOTIFY, property_handle_propertynotify);
 742         EVENT(XCB_REPARENT_NOTIFY, event_handle_reparentnotify);
 743         EVENT(XCB_UNMAP_NOTIFY, event_handle_unmapnotify);
 744 #undef EVENT
 745     }
 746
 747     static uint8_t randr_screen_change_notify = 0;
 748
 749     if(randr_screen_change_notify == 0)
 750     {
 751         /* check for randr extension */
 752         const xcb_query_extension_reply_t *randr_query;
 753         randr_query = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
 754         if(randr_query->present)
 755             randr_screen_change_notify = randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
 756     }
 757
 758     if (response_type == randr_screen_change_notify)
 759         event_handle_randr_screen_change_notify((void *) event);
 760 }
 761
 762 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80