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         /* Duplicate the drawin */
 193         lua_pushvalue(globalconf.L, -1);
 194         /* Handle the button event on it */
 195         event_button_callback(ev, &drawin->buttons, -1, 1, NULL);
 196
 197         /* And handle the button event on it again */
 198         event_emit_button(ev);
 199     }
 200     else if((c = client_getbyframewin(ev->event)))
 201     {
 202         luaA_object_push(globalconf.L, c);
 203         /* Duplicate the client */
 204         lua_pushvalue(globalconf.L, -1);
 205         /* then check if any button objects match */
 206         event_button_callback(ev, &c->buttons, -1, 1, NULL);
 207         /* And handle the button event on it again */
 208         event_emit_button(ev);
 209         xcb_allow_events(globalconf.connection,
 210                          XCB_ALLOW_REPLAY_POINTER,
 211                          XCB_CURRENT_TIME);
 212     }
 213     else if(ev->child == XCB_NONE)
 214         if(globalconf.screen->root == ev->event)
 215         {
 216             event_button_callback(ev, &globalconf.buttons, 0, 0, NULL);
 217             return;
 218         }
 219 }
 220
 221 static void
 222 event_handle_configurerequest_configure_window(xcb_configure_request_event_t *ev)
 223 {
 224     uint16_t config_win_mask = 0;
 225     uint32_t config_win_vals[7];
 226     unsigned short i = 0;
 227
 228     if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 229     {
 230         config_win_mask |= XCB_CONFIG_WINDOW_X;
 231         config_win_vals[i++] = ev->x;
 232     }
 233     if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 234     {
 235         config_win_mask |= XCB_CONFIG_WINDOW_Y;
 236         config_win_vals[i++] = ev->y;
 237     }
 238     if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 239     {
 240         config_win_mask |= XCB_CONFIG_WINDOW_WIDTH;
 241         config_win_vals[i++] = ev->width;
 242     }
 243     if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 244     {
 245         config_win_mask |= XCB_CONFIG_WINDOW_HEIGHT;
 246         config_win_vals[i++] = ev->height;
 247     }
 248     if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 249     {
 250         config_win_mask |= XCB_CONFIG_WINDOW_BORDER_WIDTH;
 251         config_win_vals[i++] = ev->border_width;
 252     }
 253     if(ev->value_mask & XCB_CONFIG_WINDOW_SIBLING)
 254     {
 255         config_win_mask |= XCB_CONFIG_WINDOW_SIBLING;
 256         config_win_vals[i++] = ev->sibling;
 257     }
 258     if(ev->value_mask & XCB_CONFIG_WINDOW_STACK_MODE)
 259     {
 260         config_win_mask |= XCB_CONFIG_WINDOW_STACK_MODE;
 261         config_win_vals[i++] = ev->stack_mode;
 262     }
 263
 264     xcb_configure_window(globalconf.connection, ev->window, config_win_mask, config_win_vals);
 265 }
 266
 267 /** The configure event handler.
 268  * \param ev The event.
 269  */
 270 static void
 271 event_handle_configurerequest(xcb_configure_request_event_t *ev)
 272 {
 273     client_t *c;
 274
 275     if((c = client_getbywin(ev->window)))
 276     {
 277         area_t geometry = c->geometry;
 278
 279         if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 280             geometry.x = ev->x;
 281         if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 282             geometry.y = ev->y;
 283         if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 284             geometry.width = ev->width;
 285         if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 286             geometry.height = ev->height;
 287
 288         if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 289         {
 290             luaA_object_push(globalconf.L, c);
 291             window_set_border_width(globalconf.L, -1, ev->border_width);
 292             lua_pop(globalconf.L, 1);
 293         }
 294
 295         if(!client_resize(c, geometry, false))
 296             /* ICCCM 4.1.5 / 4.2.3, if nothing was changed, send an event saying so */
 297             xwindow_configure(c->window, geometry, c->border_width);
 298     }
 299     else
 300         event_handle_configurerequest_configure_window(ev);
 301 }
 302
 303 /** The configure notify event handler.
 304  * \param ev The event.
 305  */
 306 static void
 307 event_handle_configurenotify(xcb_configure_notify_event_t *ev)
 308 {
 309     const xcb_screen_t *screen = globalconf.screen;
 310
 311     if(ev->window == screen->root
 312        && (ev->width != screen->width_in_pixels
 313            || ev->height != screen->height_in_pixels))
 314         /* it's not that we panic, but restart */
 315         awesome_restart();
 316 }
 317
 318 /** The destroy notify event handler.
 319  * \param ev The event.
 320  */
 321 static void
 322 event_handle_destroynotify(xcb_destroy_notify_event_t *ev)
 323 {
 324     client_t *c;
 325
 326     if((c = client_getbywin(ev->window)))
 327         client_unmanage(c);
 328     else
 329         for(int i = 0; i < globalconf.embedded.len; i++)
 330             if(globalconf.embedded.tab[i].win == ev->window)
 331             {
 332                 xembed_window_array_take(&globalconf.embedded, i);
 333                 luaA_systray_invalidate();
 334             }
 335 }
 336
 337 /** The motion notify event handler.
 338  * \param ev The event.
 339  */
 340 static void
 341 event_handle_motionnotify(xcb_motion_notify_event_t *ev)
 342 {
 343     globalconf.timestamp = ev->time;
 344
 345     if(event_handle_mousegrabber(ev->root_x, ev->root_y, ev->state))
 346         return;
 347
 348 #warning
 349 }
 350
 351 /** The leave notify event handler.
 352  * \param ev The event.
 353  */
 354 static void
 355 event_handle_leavenotify(xcb_leave_notify_event_t *ev)
 356 {
 357     drawin_t *drawin;
 358     client_t *c;
 359
 360     globalconf.timestamp = ev->time;
 361
 362     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 363         return;
 364
 365     if((c = client_getbyframewin(ev->event)))
 366     {
 367         luaA_object_push(globalconf.L, c);
 368         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 369         lua_pop(globalconf.L, 1);
 370     }
 371
 372     if((drawin = drawin_getbywin(ev->event)))
 373     {
 374         luaA_object_push(globalconf.L, drawin);
 375         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 376         lua_pop(globalconf.L, 1);
 377     }
 378 }
 379
 380 /** The enter notify event handler.
 381  * \param ev The event.
 382  */
 383 static void
 384 event_handle_enternotify(xcb_enter_notify_event_t *ev)
 385 {
 386     client_t *c;
 387     drawin_t *drawin;
 388
 389     globalconf.timestamp = ev->time;
 390
 391     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 392         return;
 393
 394     if((drawin = drawin_getbywin(ev->event)))
 395     {
 396         luaA_object_push(globalconf.L, drawin);
 397         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 398         lua_pop(globalconf.L, 1);
 399     }
 400
 401     if((c = client_getbyframewin(ev->event)))
 402     {
 403         luaA_object_push(globalconf.L, c);
 404         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 405         lua_pop(globalconf.L, 1);
 406     }
 407 }
 408
 409 /** The focus in event handler.
 410  * \param ev The event.
 411  */
 412 static void
 413 event_handle_focusin(xcb_focus_in_event_t *ev)
 414 {
 415     /* Events that we are interested in: */
 416     switch(ev->detail)
 417     {
 418         /* These are events that jump between root windows.
 419          */
 420         case XCB_NOTIFY_DETAIL_ANCESTOR:
 421         case XCB_NOTIFY_DETAIL_INFERIOR:
 422
 423         /* These are events that jump between clients.
 424          * Virtual events ensure we always get an event on our top-level window.
 425          */
 426         case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
 427         case XCB_NOTIFY_DETAIL_NONLINEAR:
 428           {
 429             client_t *c;
 430
 431             if((c = client_getbywin(ev->event)))
 432                 client_focus_update(c);
 433           }
 434         /* all other events are ignored */
 435         default:
 436             break;
 437     }
 438 }
 439
 440 /** The expose event handler.
 441  * \param ev The event.
 442  */
 443 static void
 444 event_handle_expose(xcb_expose_event_t *ev)
 445 {
 446     drawin_t *drawin;
 447
 448     if((drawin = drawin_getbywin(ev->window)))
 449         drawin_refresh_pixmap_partial(drawin,
 450                                       ev->x, ev->y,
 451                                       ev->width, ev->height);
 452 }
 453
 454 /** The key press event handler.
 455  * \param ev The event.
 456  */
 457 static void
 458 event_handle_key(xcb_key_press_event_t *ev)
 459 {
 460     globalconf.timestamp = ev->time;
 461
 462     if(globalconf.keygrabber != LUA_REFNIL)
 463     {
 464         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.keygrabber);
 465         if(keygrabber_handlekpress(globalconf.L, ev))
 466         {
 467             if(lua_pcall(globalconf.L, 3, 1, 0))
 468             {
 469                 warn("error running function: %s", lua_tostring(globalconf.L, -1));
 470                 luaA_keygrabber_stop(globalconf.L);
 471             }
 472             else if(!lua_isboolean(globalconf.L, -1) || !lua_toboolean(globalconf.L, -1))
 473                 luaA_keygrabber_stop(globalconf.L);
 474         }
 475         lua_pop(globalconf.L, 1);  /* pop returned value or function if not called */
 476     }
 477     else
 478     {
 479         /* get keysym ignoring all modifiers */
 480         xcb_keysym_t keysym = keyresolv_get_keysym(ev->detail, 0);
 481         client_t *c;
 482         if((c = client_getbyframewin(ev->event)))
 483         {
 484             luaA_object_push(globalconf.L, c);
 485             event_key_callback(ev, &c->keys, -1, 1, &keysym);
 486         }
 487         else
 488             event_key_callback(ev, &globalconf.keys, 0, 0, &keysym);
 489     }
 490 }
 491
 492 /** The map request event handler.
 493  * \param ev The event.
 494  */
 495 static void
 496 event_handle_maprequest(xcb_map_request_event_t *ev)
 497 {
 498     client_t *c;
 499     xcb_get_window_attributes_cookie_t wa_c;
 500     xcb_get_window_attributes_reply_t *wa_r;
 501     xcb_get_geometry_cookie_t geom_c;
 502     xcb_get_geometry_reply_t *geom_r;
 503
 504     wa_c = xcb_get_window_attributes_unchecked(globalconf.connection, ev->window);
 505
 506     if(!(wa_r = xcb_get_window_attributes_reply(globalconf.connection, wa_c, NULL)))
 507         return;
 508
 509     if(wa_r->override_redirect)
 510         goto bailout;
 511
 512     if(xembed_getbywin(&globalconf.embedded, ev->window))
 513     {
 514         xcb_map_window(globalconf.connection, ev->window);
 515         xembed_window_activate(globalconf.connection, ev->window);
 516     }
 517     else if((c = client_getbywin(ev->window)))
 518     {
 519         /* Check that it may be visible, but not asked to be hidden */
 520         if(client_maybevisible(c, c->screen) && !c->hidden)
 521         {
 522             luaA_object_push(globalconf.L, c);
 523             client_set_minimized(globalconf.L, -1, false);
 524             lua_pop(globalconf.L, 1);
 525             /* it will be raised, so just update ourself */
 526             client_raise(c);
 527         }
 528     }
 529     else
 530     {
 531         geom_c = xcb_get_geometry_unchecked(globalconf.connection, ev->window);
 532
 533         if(!(geom_r = xcb_get_geometry_reply(globalconf.connection, geom_c, NULL)))
 534         {
 535             goto bailout;
 536         }
 537
 538         client_manage(ev->window, geom_r, false);
 539
 540         p_delete(&geom_r);
 541     }
 542
 543 bailout:
 544     p_delete(&wa_r);
 545 }
 546
 547 /** The unmap notify event handler.
 548  * \param ev The event.
 549  */
 550 static void
 551 event_handle_unmapnotify(xcb_unmap_notify_event_t *ev)
 552 {
 553     client_t *c;
 554
 555     if((c = client_getbywin(ev->window)))
 556     {
 557         client_unmanage(c);
 558     }
 559     else
 560         for(int i = 0; i < globalconf.embedded.len; i++)
 561             if(globalconf.embedded.tab[i].win == ev->window)
 562             {
 563                 xembed_window_array_take(&globalconf.embedded, i);
 564                 xcb_change_save_set(globalconf.connection, XCB_SET_MODE_DELETE, ev->window);
 565                 luaA_systray_invalidate();
 566             }
 567 }
 568
 569 /** The randr screen change notify event handler.
 570  * \param ev The event.
 571  */
 572 static void
 573 event_handle_randr_screen_change_notify(xcb_randr_screen_change_notify_event_t *ev)
 574 {
 575     /* Code  of  XRRUpdateConfiguration Xlib  function  ported to  XCB
 576      * (only the code relevant  to RRScreenChangeNotify) as the latter
 577      * doesn't provide this kind of function */
 578     if(ev->rotation & (XCB_RANDR_ROTATION_ROTATE_90 | XCB_RANDR_ROTATION_ROTATE_270))
 579         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->height, ev->width,
 580                                   ev->mheight, ev->mwidth);
 581     else
 582         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->width, ev->height,
 583                                   ev->mwidth, ev->mheight);
 584
 585     /* XRRUpdateConfiguration also executes the following instruction
 586      * but it's not useful because SubpixelOrder is not used at all at
 587      * the moment
 588      *
 589      * XRenderSetSubpixelOrder(dpy, snum, scevent->subpixel_order);
 590      */
 591
 592     awesome_restart();
 593 }
 594
 595 /** The client message event handler.
 596  * \param ev The event.
 597  */
 598 static void
 599 event_handle_clientmessage(xcb_client_message_event_t *ev)
 600 {
 601     /* check for startup notification messages */
 602     if(sn_xcb_display_process_event(globalconf.sndisplay, (xcb_generic_event_t *) ev))
 603         return;
 604
 605     if(ev->type == WM_CHANGE_STATE)
 606     {
 607         client_t *c;
 608         if((c = client_getbywin(ev->window))
 609            && ev->format == 32
 610            && ev->data.data32[0] == XCB_WM_STATE_ICONIC)
 611         {
 612             luaA_object_push(globalconf.L, c);
 613             client_set_minimized(globalconf.L, -1, true);
 614             lua_pop(globalconf.L, 1);
 615         }
 616     }
 617     else if(ev->type == _XEMBED)
 618         xembed_process_client_message(ev);
 619     else if(ev->type == _NET_SYSTEM_TRAY_OPCODE)
 620         systray_process_client_message(ev);
 621     else
 622         ewmh_process_client_message(ev);
 623 }
 624
 625 /** The keymap change notify event handler.
 626  * \param ev The event.
 627  */
 628 static void
 629 event_handle_mappingnotify(xcb_mapping_notify_event_t *ev)
 630 {
 631     if(ev->request == XCB_MAPPING_MODIFIER
 632        || ev->request == XCB_MAPPING_KEYBOARD)
 633     {
 634         xcb_get_modifier_mapping_cookie_t xmapping_cookie =
 635             xcb_get_modifier_mapping_unchecked(globalconf.connection);
 636
 637         /* Free and then allocate the key symbols */
 638         xcb_key_symbols_free(globalconf.keysyms);
 639         globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
 640
 641         xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
 642                             globalconf.keysyms, &globalconf.numlockmask,
 643                             &globalconf.shiftlockmask, &globalconf.capslockmask,
 644                             &globalconf.modeswitchmask);
 645
 646         /* regrab everything */
 647         xcb_screen_t *s = globalconf.screen;
 648         /* yes XCB_BUTTON_MASK_ANY is also for grab_key even if it's look weird */
 649         xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, s->root, XCB_BUTTON_MASK_ANY);
 650         xwindow_grabkeys(s->root, &globalconf.keys);
 651
 652         foreach(_c, globalconf.clients)
 653         {
 654             client_t *c = *_c;
 655             xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, c->frame_window, XCB_BUTTON_MASK_ANY);
 656             xwindow_grabkeys(c->frame_window, &c->keys);
 657         }
 658     }
 659 }
 660
 661 static void
 662 event_handle_reparentnotify(xcb_reparent_notify_event_t *ev)
 663 {
 664     client_t *c;
 665
 666     if((c = client_getbywin(ev->window)) && c->frame_window != ev->parent)
 667     {
 668         /* Ignore reparents to the root window, they *might* be caused by
 669          * ourselves if a client quickly unmaps and maps itself again. */
 670         if (ev->parent != globalconf.screen->root)
 671             client_unmanage(c);
 672     }
 673 }
 674
 675 /** \brief awesome xerror function.
 676  * There's no way to check accesses to destroyed windows, thus those cases are
 677  * ignored (especially on UnmapNotify's).
 678  * \param e The error event.
 679  */
 680 static void
 681 xerror(xcb_generic_error_t *e)
 682 {
 683     /* ignore this */
 684     if(e->error_code == XCB_WINDOW
 685        || (e->error_code == XCB_MATCH
 686            && e->major_code == XCB_SET_INPUT_FOCUS)
 687        || (e->error_code == XCB_VALUE
 688            && e->major_code == XCB_KILL_CLIENT)
 689        || (e->error_code == XCB_MATCH
 690            && e->major_code == XCB_CONFIGURE_WINDOW))
 691         return;
 692
 693     warn("X error: request=%s, error=%s",
 694          xcb_event_get_request_label(e->major_code),
 695          xcb_event_get_error_label(e->error_code));
 696
 697     return;
 698 }
 699
 700 void event_handle(xcb_generic_event_t *event)
 701 {
 702     uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
 703
 704     if(response_type == 0)
 705     {
 706         /* This is an error, not a event */
 707         xerror((xcb_generic_error_t *) event);
 708         return;
 709     }
 710
 711     switch(response_type)
 712     {
 713 #define EVENT(type, callback) case type: callback((void *) event); return
 714         EVENT(XCB_BUTTON_PRESS, event_handle_button);
 715         EVENT(XCB_BUTTON_RELEASE, event_handle_button);
 716         EVENT(XCB_CONFIGURE_REQUEST, event_handle_configurerequest);
 717         EVENT(XCB_CONFIGURE_NOTIFY, event_handle_configurenotify);
 718         EVENT(XCB_DESTROY_NOTIFY, event_handle_destroynotify);
 719         EVENT(XCB_ENTER_NOTIFY, event_handle_enternotify);
 720         EVENT(XCB_CLIENT_MESSAGE, event_handle_clientmessage);
 721         EVENT(XCB_EXPOSE, event_handle_expose);
 722         EVENT(XCB_FOCUS_IN, event_handle_focusin);
 723         EVENT(XCB_KEY_PRESS, event_handle_key);
 724         EVENT(XCB_KEY_RELEASE, event_handle_key);
 725         EVENT(XCB_LEAVE_NOTIFY, event_handle_leavenotify);
 726         EVENT(XCB_MAPPING_NOTIFY, event_handle_mappingnotify);
 727         EVENT(XCB_MAP_REQUEST, event_handle_maprequest);
 728         EVENT(XCB_MOTION_NOTIFY, event_handle_motionnotify);
 729         EVENT(XCB_PROPERTY_NOTIFY, property_handle_propertynotify);
 730         EVENT(XCB_REPARENT_NOTIFY, event_handle_reparentnotify);
 731         EVENT(XCB_UNMAP_NOTIFY, event_handle_unmapnotify);
 732 #undef EVENT
 733     }
 734
 735     static uint8_t randr_screen_change_notify = 0;
 736
 737     if(randr_screen_change_notify == 0)
 738     {
 739         /* check for randr extension */
 740         const xcb_query_extension_reply_t *randr_query;
 741         randr_query = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
 742         if(randr_query->present)
 743             randr_screen_change_notify = randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
 744     }
 745
 746     if (response_type == randr_screen_change_notify)
 747         event_handle_randr_screen_change_notify((void *) event);
 748 }
 749
 750 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80