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, false);
 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     drawin_t *w;
 344     client_t *c;
 345
 346     globalconf.timestamp = ev->time;
 347
 348     if(event_handle_mousegrabber(ev->root_x, ev->root_y, ev->state))
 349         return;
 350
 351     if((c = client_getbyframewin(ev->event)))
 352     {
 353         luaA_object_push(globalconf.L, c);
 354         lua_pushnumber(globalconf.L, ev->event_x);
 355         lua_pushnumber(globalconf.L, ev->event_y);
 356         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 357         lua_pop(globalconf.L, 1);
 358     }
 359
 360     if((w = drawin_getbywin(ev->event)))
 361     {
 362         luaA_object_push(globalconf.L, w);
 363         lua_pushnumber(globalconf.L, ev->event_x);
 364         lua_pushnumber(globalconf.L, ev->event_y);
 365         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 366         lua_pop(globalconf.L, 1);
 367     }
 368 }
 369
 370 /** The leave notify event handler.
 371  * \param ev The event.
 372  */
 373 static void
 374 event_handle_leavenotify(xcb_leave_notify_event_t *ev)
 375 {
 376     drawin_t *drawin;
 377     client_t *c;
 378
 379     globalconf.timestamp = ev->time;
 380
 381     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 382         return;
 383
 384     if((c = client_getbyframewin(ev->event)))
 385     {
 386         luaA_object_push(globalconf.L, c);
 387         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 388         lua_pop(globalconf.L, 1);
 389     }
 390
 391     if((drawin = drawin_getbywin(ev->event)))
 392     {
 393         luaA_object_push(globalconf.L, drawin);
 394         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 395         lua_pop(globalconf.L, 1);
 396     }
 397 }
 398
 399 /** The enter notify event handler.
 400  * \param ev The event.
 401  */
 402 static void
 403 event_handle_enternotify(xcb_enter_notify_event_t *ev)
 404 {
 405     client_t *c;
 406     drawin_t *drawin;
 407
 408     globalconf.timestamp = ev->time;
 409
 410     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 411         return;
 412
 413     if((drawin = drawin_getbywin(ev->event)))
 414     {
 415         luaA_object_push(globalconf.L, drawin);
 416         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 417         lua_pop(globalconf.L, 1);
 418     }
 419
 420     if((c = client_getbyframewin(ev->event)))
 421     {
 422         luaA_object_push(globalconf.L, c);
 423         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 424         lua_pop(globalconf.L, 1);
 425     }
 426 }
 427
 428 /** The focus in event handler.
 429  * \param ev The event.
 430  */
 431 static void
 432 event_handle_focusin(xcb_focus_in_event_t *ev)
 433 {
 434     /* Events that we are interested in: */
 435     switch(ev->detail)
 436     {
 437         /* These are events that jump between root windows.
 438          */
 439         case XCB_NOTIFY_DETAIL_ANCESTOR:
 440         case XCB_NOTIFY_DETAIL_INFERIOR:
 441
 442         /* These are events that jump between clients.
 443          * Virtual events ensure we always get an event on our top-level window.
 444          */
 445         case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
 446         case XCB_NOTIFY_DETAIL_NONLINEAR:
 447           {
 448             client_t *c;
 449
 450             if((c = client_getbywin(ev->event)))
 451                 client_focus_update(c);
 452           }
 453         /* all other events are ignored */
 454         default:
 455             break;
 456     }
 457 }
 458
 459 /** The expose event handler.
 460  * \param ev The event.
 461  */
 462 static void
 463 event_handle_expose(xcb_expose_event_t *ev)
 464 {
 465     drawin_t *drawin;
 466
 467     if((drawin = drawin_getbywin(ev->window)))
 468         drawin_refresh_pixmap_partial(drawin,
 469                                       ev->x, ev->y,
 470                                       ev->width, ev->height);
 471 }
 472
 473 /** The key press event handler.
 474  * \param ev The event.
 475  */
 476 static void
 477 event_handle_key(xcb_key_press_event_t *ev)
 478 {
 479     globalconf.timestamp = ev->time;
 480
 481     if(globalconf.keygrabber != LUA_REFNIL)
 482     {
 483         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.keygrabber);
 484         if(keygrabber_handlekpress(globalconf.L, ev))
 485         {
 486             if(lua_pcall(globalconf.L, 3, 1, 0))
 487             {
 488                 warn("error running function: %s", lua_tostring(globalconf.L, -1));
 489                 luaA_keygrabber_stop(globalconf.L);
 490             }
 491             else if(!lua_isboolean(globalconf.L, -1) || !lua_toboolean(globalconf.L, -1))
 492                 luaA_keygrabber_stop(globalconf.L);
 493         }
 494         lua_pop(globalconf.L, 1);  /* pop returned value or function if not called */
 495     }
 496     else
 497     {
 498         /* get keysym ignoring all modifiers */
 499         xcb_keysym_t keysym = keyresolv_get_keysym(ev->detail, 0);
 500         client_t *c;
 501         if((c = client_getbyframewin(ev->event)))
 502         {
 503             luaA_object_push(globalconf.L, c);
 504             event_key_callback(ev, &c->keys, -1, 1, &keysym);
 505         }
 506         else
 507             event_key_callback(ev, &globalconf.keys, 0, 0, &keysym);
 508     }
 509 }
 510
 511 /** The map request event handler.
 512  * \param ev The event.
 513  */
 514 static void
 515 event_handle_maprequest(xcb_map_request_event_t *ev)
 516 {
 517     client_t *c;
 518     xcb_get_window_attributes_cookie_t wa_c;
 519     xcb_get_window_attributes_reply_t *wa_r;
 520     xcb_get_geometry_cookie_t geom_c;
 521     xcb_get_geometry_reply_t *geom_r;
 522
 523     wa_c = xcb_get_window_attributes_unchecked(globalconf.connection, ev->window);
 524
 525     if(!(wa_r = xcb_get_window_attributes_reply(globalconf.connection, wa_c, NULL)))
 526         return;
 527
 528     if(wa_r->override_redirect)
 529         goto bailout;
 530
 531     if(xembed_getbywin(&globalconf.embedded, ev->window))
 532     {
 533         xcb_map_window(globalconf.connection, ev->window);
 534         xembed_window_activate(globalconf.connection, ev->window);
 535     }
 536     else if((c = client_getbywin(ev->window)))
 537     {
 538         /* Check that it may be visible, but not asked to be hidden */
 539         if(client_maybevisible(c, c->screen) && !c->hidden)
 540         {
 541             luaA_object_push(globalconf.L, c);
 542             client_set_minimized(globalconf.L, -1, false);
 543             lua_pop(globalconf.L, 1);
 544             /* it will be raised, so just update ourself */
 545             client_raise(c);
 546         }
 547     }
 548     else
 549     {
 550         geom_c = xcb_get_geometry_unchecked(globalconf.connection, ev->window);
 551
 552         if(!(geom_r = xcb_get_geometry_reply(globalconf.connection, geom_c, NULL)))
 553         {
 554             goto bailout;
 555         }
 556
 557         client_manage(ev->window, geom_r, false);
 558
 559         p_delete(&geom_r);
 560     }
 561
 562 bailout:
 563     p_delete(&wa_r);
 564 }
 565
 566 /** The unmap notify event handler.
 567  * \param ev The event.
 568  */
 569 static void
 570 event_handle_unmapnotify(xcb_unmap_notify_event_t *ev)
 571 {
 572     client_t *c;
 573
 574     if((c = client_getbywin(ev->window)))
 575         client_unmanage(c, true);
 576     else
 577         for(int i = 0; i < globalconf.embedded.len; i++)
 578             if(globalconf.embedded.tab[i].win == ev->window)
 579             {
 580                 xembed_window_array_take(&globalconf.embedded, i);
 581                 xcb_change_save_set(globalconf.connection, XCB_SET_MODE_DELETE, ev->window);
 582                 luaA_systray_invalidate();
 583             }
 584 }
 585
 586 /** The randr screen change notify event handler.
 587  * \param ev The event.
 588  */
 589 static void
 590 event_handle_randr_screen_change_notify(xcb_randr_screen_change_notify_event_t *ev)
 591 {
 592     /* Code  of  XRRUpdateConfiguration Xlib  function  ported to  XCB
 593      * (only the code relevant  to RRScreenChangeNotify) as the latter
 594      * doesn't provide this kind of function */
 595     if(ev->rotation & (XCB_RANDR_ROTATION_ROTATE_90 | XCB_RANDR_ROTATION_ROTATE_270))
 596         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->height, ev->width,
 597                                   ev->mheight, ev->mwidth);
 598     else
 599         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->width, ev->height,
 600                                   ev->mwidth, ev->mheight);
 601
 602     /* XRRUpdateConfiguration also executes the following instruction
 603      * but it's not useful because SubpixelOrder is not used at all at
 604      * the moment
 605      *
 606      * XRenderSetSubpixelOrder(dpy, snum, scevent->subpixel_order);
 607      */
 608
 609     awesome_restart();
 610 }
 611
 612 /** The client message event handler.
 613  * \param ev The event.
 614  */
 615 static void
 616 event_handle_clientmessage(xcb_client_message_event_t *ev)
 617 {
 618     /* check for startup notification messages */
 619     if(sn_xcb_display_process_event(globalconf.sndisplay, (xcb_generic_event_t *) ev))
 620         return;
 621
 622     if(ev->type == WM_CHANGE_STATE)
 623     {
 624         client_t *c;
 625         if((c = client_getbywin(ev->window))
 626            && ev->format == 32
 627            && ev->data.data32[0] == XCB_WM_STATE_ICONIC)
 628         {
 629             luaA_object_push(globalconf.L, c);
 630             client_set_minimized(globalconf.L, -1, true);
 631             lua_pop(globalconf.L, 1);
 632         }
 633     }
 634     else if(ev->type == _XEMBED)
 635         xembed_process_client_message(ev);
 636     else if(ev->type == _NET_SYSTEM_TRAY_OPCODE)
 637         systray_process_client_message(ev);
 638     else
 639         ewmh_process_client_message(ev);
 640 }
 641
 642 /** The keymap change notify event handler.
 643  * \param ev The event.
 644  */
 645 static void
 646 event_handle_mappingnotify(xcb_mapping_notify_event_t *ev)
 647 {
 648     if(ev->request == XCB_MAPPING_MODIFIER
 649        || ev->request == XCB_MAPPING_KEYBOARD)
 650     {
 651         xcb_get_modifier_mapping_cookie_t xmapping_cookie =
 652             xcb_get_modifier_mapping_unchecked(globalconf.connection);
 653
 654         /* Free and then allocate the key symbols */
 655         xcb_key_symbols_free(globalconf.keysyms);
 656         globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
 657
 658         xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
 659                             globalconf.keysyms, &globalconf.numlockmask,
 660                             &globalconf.shiftlockmask, &globalconf.capslockmask,
 661                             &globalconf.modeswitchmask);
 662
 663         /* regrab everything */
 664         xcb_screen_t *s = globalconf.screen;
 665         /* yes XCB_BUTTON_MASK_ANY is also for grab_key even if it's look weird */
 666         xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, s->root, XCB_BUTTON_MASK_ANY);
 667         xwindow_grabkeys(s->root, &globalconf.keys);
 668
 669         foreach(_c, globalconf.clients)
 670         {
 671             client_t *c = *_c;
 672             xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, c->frame_window, XCB_BUTTON_MASK_ANY);
 673             xwindow_grabkeys(c->frame_window, &c->keys);
 674         }
 675     }
 676 }
 677
 678 static void
 679 event_handle_reparentnotify(xcb_reparent_notify_event_t *ev)
 680 {
 681     client_t *c;
 682
 683     if((c = client_getbywin(ev->window)) && c->frame_window != ev->parent)
 684     {
 685         /* Ignore reparents to the root window, they *might* be caused by
 686          * ourselves if a client quickly unmaps and maps itself again. */
 687         if (ev->parent != globalconf.screen->root)
 688             client_unmanage(c, true);
 689     }
 690 }
 691
 692 /** \brief awesome xerror function.
 693  * There's no way to check accesses to destroyed windows, thus those cases are
 694  * ignored (especially on UnmapNotify's).
 695  * \param e The error event.
 696  */
 697 static void
 698 xerror(xcb_generic_error_t *e)
 699 {
 700     /* ignore this */
 701     if(e->error_code == XCB_WINDOW
 702        || (e->error_code == XCB_MATCH
 703            && e->major_code == XCB_SET_INPUT_FOCUS)
 704        || (e->error_code == XCB_VALUE
 705            && e->major_code == XCB_KILL_CLIENT)
 706        || (e->error_code == XCB_MATCH
 707            && e->major_code == XCB_CONFIGURE_WINDOW))
 708         return;
 709
 710     warn("X error: request=%s, error=%s",
 711          xcb_event_get_request_label(e->major_code),
 712          xcb_event_get_error_label(e->error_code));
 713
 714     return;
 715 }
 716
 717 void event_handle(xcb_generic_event_t *event)
 718 {
 719     uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
 720
 721     if(response_type == 0)
 722     {
 723         /* This is an error, not a event */
 724         xerror((xcb_generic_error_t *) event);
 725         return;
 726     }
 727
 728     switch(response_type)
 729     {
 730 #define EVENT(type, callback) case type: callback((void *) event); return
 731         EVENT(XCB_BUTTON_PRESS, event_handle_button);
 732         EVENT(XCB_BUTTON_RELEASE, event_handle_button);
 733         EVENT(XCB_CONFIGURE_REQUEST, event_handle_configurerequest);
 734         EVENT(XCB_CONFIGURE_NOTIFY, event_handle_configurenotify);
 735         EVENT(XCB_DESTROY_NOTIFY, event_handle_destroynotify);
 736         EVENT(XCB_ENTER_NOTIFY, event_handle_enternotify);
 737         EVENT(XCB_CLIENT_MESSAGE, event_handle_clientmessage);
 738         EVENT(XCB_EXPOSE, event_handle_expose);
 739         EVENT(XCB_FOCUS_IN, event_handle_focusin);
 740         EVENT(XCB_KEY_PRESS, event_handle_key);
 741         EVENT(XCB_KEY_RELEASE, event_handle_key);
 742         EVENT(XCB_LEAVE_NOTIFY, event_handle_leavenotify);
 743         EVENT(XCB_MAPPING_NOTIFY, event_handle_mappingnotify);
 744         EVENT(XCB_MAP_REQUEST, event_handle_maprequest);
 745         EVENT(XCB_MOTION_NOTIFY, event_handle_motionnotify);
 746         EVENT(XCB_PROPERTY_NOTIFY, property_handle_propertynotify);
 747         EVENT(XCB_REPARENT_NOTIFY, event_handle_reparentnotify);
 748         EVENT(XCB_UNMAP_NOTIFY, event_handle_unmapnotify);
 749 #undef EVENT
 750     }
 751
 752     static uint8_t randr_screen_change_notify = 0;
 753
 754     if(randr_screen_change_notify == 0)
 755     {
 756         /* check for randr extension */
 757         const xcb_query_extension_reply_t *randr_query;
 758         randr_query = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
 759         if(randr_query->present)
 760             randr_screen_change_notify = randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
 761     }
 762
 763     if (response_type == randr_screen_change_notify)
 764         event_handle_randr_screen_change_notify((void *) event);
 765 }
 766
 767 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80