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         luaA_mouse_pushstatus(globalconf.L, x, y);
 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 /** Update the global button state
 160  * \param response_type XCB_BUTTON_PRESS or XCB_BUTTON_RELEASE
 161  * \param button Button being changed
 162  */
 163 static void
 164 event_update_button_state(uint8_t response_type, uint8_t button)
 165 {
 166     /* There is no button 0! */
 167     const unsigned int max_button = sizeof(globalconf.buttons_pressed) * 8;
 168     uint32_t mask = 1 << (button - 1);
 169
 170     if (button > max_button) {
 171         warn("Button %d pressed, but we only support %d buttons", button, max_button);
 172         return;
 173     }
 174
 175     switch(response_type)
 176     {
 177     case XCB_BUTTON_PRESS:
 178         /* Set the (button-1)-st bit */
 179         globalconf.buttons_pressed |= mask;
 180         break;
 181     case XCB_BUTTON_RELEASE:
 182         /* Clear the (button-1)-st bit */
 183         globalconf.buttons_pressed &= ~mask;
 184         break;
 185     default:
 186         fatal("Invalid event type");
 187     }
 188 }
 189
 190 /** The button press event handler.
 191  * \param ev The event.
 192  */
 193 static void
 194 event_handle_button(xcb_button_press_event_t *ev)
 195 {
 196     client_t *c;
 197     drawin_t *drawin;
 198
 199     globalconf.timestamp = ev->time;
 200
 201     event_update_button_state(ev->response_type, ev->detail);
 202
 203     if(event_handle_mousegrabber(ev->root_x, ev->root_y, 1 << (ev->detail - 1 + 8)))
 204         return;
 205
 206     /* ev->state is
 207      * button status (8 bits) + modifiers status (8 bits)
 208      * we don't care for button status that we get, especially on release, so
 209      * drop them */
 210     ev->state &= 0x00ff;
 211
 212     if((drawin = drawin_getbywin(ev->event))
 213        || (drawin = drawin_getbywin(ev->child)))
 214     {
 215         /* If the drawin is child, then x,y are
 216          * relative to root window */
 217         if(drawin->window == ev->child)
 218         {
 219             ev->event_x -= drawin->geometry.x;
 220             ev->event_y -= drawin->geometry.y;
 221         }
 222
 223         /* Push the drawin */
 224         luaA_object_push(globalconf.L, drawin);
 225         /* and handle the button raw button event */
 226         event_emit_button(ev);
 227         /* check if any button object matches */
 228         event_button_callback(ev, &drawin->buttons, -1, 1, NULL);
 229     }
 230     else if((c = client_getbyframewin(ev->event)))
 231     {
 232         luaA_object_push(globalconf.L, c);
 233         /* And handle the button raw button event */
 234         event_emit_button(ev);
 235         /* then check if any button objects match */
 236         event_button_callback(ev, &c->buttons, -1, 1, NULL);
 237         xcb_allow_events(globalconf.connection,
 238                          XCB_ALLOW_REPLAY_POINTER,
 239                          XCB_CURRENT_TIME);
 240     }
 241     else if(ev->child == XCB_NONE)
 242         if(globalconf.screen->root == ev->event)
 243         {
 244             event_button_callback(ev, &globalconf.buttons, 0, 0, NULL);
 245             return;
 246         }
 247 }
 248
 249 static void
 250 event_handle_configurerequest_configure_window(xcb_configure_request_event_t *ev)
 251 {
 252     uint16_t config_win_mask = 0;
 253     uint32_t config_win_vals[7];
 254     unsigned short i = 0;
 255
 256     if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 257     {
 258         config_win_mask |= XCB_CONFIG_WINDOW_X;
 259         config_win_vals[i++] = ev->x;
 260     }
 261     if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 262     {
 263         config_win_mask |= XCB_CONFIG_WINDOW_Y;
 264         config_win_vals[i++] = ev->y;
 265     }
 266     if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 267     {
 268         config_win_mask |= XCB_CONFIG_WINDOW_WIDTH;
 269         config_win_vals[i++] = ev->width;
 270     }
 271     if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 272     {
 273         config_win_mask |= XCB_CONFIG_WINDOW_HEIGHT;
 274         config_win_vals[i++] = ev->height;
 275     }
 276     if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 277     {
 278         config_win_mask |= XCB_CONFIG_WINDOW_BORDER_WIDTH;
 279         config_win_vals[i++] = ev->border_width;
 280     }
 281     if(ev->value_mask & XCB_CONFIG_WINDOW_SIBLING)
 282     {
 283         config_win_mask |= XCB_CONFIG_WINDOW_SIBLING;
 284         config_win_vals[i++] = ev->sibling;
 285     }
 286     if(ev->value_mask & XCB_CONFIG_WINDOW_STACK_MODE)
 287     {
 288         config_win_mask |= XCB_CONFIG_WINDOW_STACK_MODE;
 289         config_win_vals[i++] = ev->stack_mode;
 290     }
 291
 292     xcb_configure_window(globalconf.connection, ev->window, config_win_mask, config_win_vals);
 293 }
 294
 295 /** The configure event handler.
 296  * \param ev The event.
 297  */
 298 static void
 299 event_handle_configurerequest(xcb_configure_request_event_t *ev)
 300 {
 301     client_t *c;
 302
 303     if((c = client_getbywin(ev->window)))
 304     {
 305         area_t geometry = c->geometry;
 306
 307         if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 308             geometry.x = ev->x;
 309         if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 310             geometry.y = ev->y;
 311         if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 312             geometry.width = ev->width;
 313         if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 314             geometry.height = ev->height;
 315
 316         if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 317         {
 318             luaA_object_push(globalconf.L, c);
 319             window_set_border_width(globalconf.L, -1, ev->border_width);
 320             lua_pop(globalconf.L, 1);
 321         }
 322
 323         if(!client_resize(c, geometry))
 324             /* ICCCM 4.1.5 / 4.2.3, if nothing was changed, send an event saying so */
 325             xwindow_configure(c->window, geometry, c->border_width);
 326     }
 327     else
 328         event_handle_configurerequest_configure_window(ev);
 329 }
 330
 331 /** The configure notify event handler.
 332  * \param ev The event.
 333  */
 334 static void
 335 event_handle_configurenotify(xcb_configure_notify_event_t *ev)
 336 {
 337     const xcb_screen_t *screen = globalconf.screen;
 338
 339     if(ev->window == screen->root
 340        && (ev->width != screen->width_in_pixels
 341            || ev->height != screen->height_in_pixels))
 342         /* it's not that we panic, but restart */
 343         awesome_restart();
 344 }
 345
 346 /** The destroy notify event handler.
 347  * \param ev The event.
 348  */
 349 static void
 350 event_handle_destroynotify(xcb_destroy_notify_event_t *ev)
 351 {
 352     client_t *c;
 353
 354     if((c = client_getbywin(ev->window)))
 355         client_unmanage(c, false);
 356     else
 357         for(int i = 0; i < globalconf.embedded.len; i++)
 358             if(globalconf.embedded.tab[i].win == ev->window)
 359             {
 360                 xembed_window_array_take(&globalconf.embedded, i);
 361                 luaA_systray_invalidate();
 362             }
 363 }
 364
 365 /** The motion notify event handler.
 366  * \param ev The event.
 367  */
 368 static void
 369 event_handle_motionnotify(xcb_motion_notify_event_t *ev)
 370 {
 371     drawin_t *w;
 372     client_t *c;
 373
 374     globalconf.timestamp = ev->time;
 375
 376     if(event_handle_mousegrabber(ev->root_x, ev->root_y, ev->state))
 377         return;
 378
 379     if((c = client_getbyframewin(ev->event)))
 380     {
 381         luaA_object_push(globalconf.L, c);
 382         lua_pushnumber(globalconf.L, ev->event_x);
 383         lua_pushnumber(globalconf.L, ev->event_y);
 384         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 385         lua_pop(globalconf.L, 1);
 386     }
 387
 388     if((w = drawin_getbywin(ev->event)))
 389     {
 390         luaA_object_push(globalconf.L, w);
 391         lua_pushnumber(globalconf.L, ev->event_x);
 392         lua_pushnumber(globalconf.L, ev->event_y);
 393         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 394         lua_pop(globalconf.L, 1);
 395     }
 396 }
 397
 398 /** The leave notify event handler.
 399  * \param ev The event.
 400  */
 401 static void
 402 event_handle_leavenotify(xcb_leave_notify_event_t *ev)
 403 {
 404     drawin_t *drawin;
 405     client_t *c;
 406
 407     globalconf.timestamp = ev->time;
 408
 409     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 410         return;
 411
 412     if((c = client_getbyframewin(ev->event)))
 413     {
 414         luaA_object_push(globalconf.L, c);
 415         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 416         lua_pop(globalconf.L, 1);
 417     }
 418
 419     if((drawin = drawin_getbywin(ev->event)))
 420     {
 421         luaA_object_push(globalconf.L, drawin);
 422         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 423         lua_pop(globalconf.L, 1);
 424     }
 425 }
 426
 427 /** The enter notify event handler.
 428  * \param ev The event.
 429  */
 430 static void
 431 event_handle_enternotify(xcb_enter_notify_event_t *ev)
 432 {
 433     client_t *c;
 434     drawin_t *drawin;
 435
 436     globalconf.timestamp = ev->time;
 437
 438     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 439         return;
 440
 441     if((drawin = drawin_getbywin(ev->event)))
 442     {
 443         luaA_object_push(globalconf.L, drawin);
 444         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 445         lua_pop(globalconf.L, 1);
 446     }
 447
 448     if((c = client_getbyframewin(ev->event)))
 449     {
 450         luaA_object_push(globalconf.L, c);
 451         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 452         lua_pop(globalconf.L, 1);
 453     }
 454 }
 455
 456 /** The focus in event handler.
 457  * \param ev The event.
 458  */
 459 static void
 460 event_handle_focusin(xcb_focus_in_event_t *ev)
 461 {
 462     /* Events that we are interested in: */
 463     switch(ev->detail)
 464     {
 465         /* These are events that jump between root windows.
 466          */
 467         case XCB_NOTIFY_DETAIL_ANCESTOR:
 468         case XCB_NOTIFY_DETAIL_INFERIOR:
 469
 470         /* These are events that jump between clients.
 471          * Virtual events ensure we always get an event on our top-level window.
 472          */
 473         case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
 474         case XCB_NOTIFY_DETAIL_NONLINEAR:
 475           {
 476             client_t *c;
 477
 478             if((c = client_getbywin(ev->event)))
 479                 client_focus_update(c);
 480           }
 481         /* all other events are ignored */
 482         default:
 483             break;
 484     }
 485 }
 486
 487 /** The expose event handler.
 488  * \param ev The event.
 489  */
 490 static void
 491 event_handle_expose(xcb_expose_event_t *ev)
 492 {
 493     drawin_t *drawin;
 494
 495     if((drawin = drawin_getbywin(ev->window)))
 496         drawin_refresh_pixmap_partial(drawin,
 497                                       ev->x, ev->y,
 498                                       ev->width, ev->height);
 499 }
 500
 501 /** The key press event handler.
 502  * \param ev The event.
 503  */
 504 static void
 505 event_handle_key(xcb_key_press_event_t *ev)
 506 {
 507     globalconf.timestamp = ev->time;
 508
 509     if(globalconf.keygrabber != LUA_REFNIL)
 510     {
 511         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.keygrabber);
 512         if(keygrabber_handlekpress(globalconf.L, ev))
 513         {
 514             if(lua_pcall(globalconf.L, 3, 1, 0))
 515             {
 516                 warn("error running function: %s", lua_tostring(globalconf.L, -1));
 517                 luaA_keygrabber_stop(globalconf.L);
 518             }
 519         }
 520         lua_pop(globalconf.L, 1);  /* pop returned value or function if not called */
 521     }
 522     else
 523     {
 524         /* get keysym ignoring all modifiers */
 525         xcb_keysym_t keysym = keyresolv_get_keysym(ev->detail, 0);
 526         client_t *c;
 527         if((c = client_getbyframewin(ev->event)))
 528         {
 529             luaA_object_push(globalconf.L, c);
 530             event_key_callback(ev, &c->keys, -1, 1, &keysym);
 531         }
 532         else
 533             event_key_callback(ev, &globalconf.keys, 0, 0, &keysym);
 534     }
 535 }
 536
 537 /** The map request event handler.
 538  * \param ev The event.
 539  */
 540 static void
 541 event_handle_maprequest(xcb_map_request_event_t *ev)
 542 {
 543     client_t *c;
 544     xcb_get_window_attributes_cookie_t wa_c;
 545     xcb_get_window_attributes_reply_t *wa_r;
 546     xcb_get_geometry_cookie_t geom_c;
 547     xcb_get_geometry_reply_t *geom_r;
 548
 549     wa_c = xcb_get_window_attributes_unchecked(globalconf.connection, ev->window);
 550
 551     if(!(wa_r = xcb_get_window_attributes_reply(globalconf.connection, wa_c, NULL)))
 552         return;
 553
 554     if(wa_r->override_redirect)
 555         goto bailout;
 556
 557     if(xembed_getbywin(&globalconf.embedded, ev->window))
 558     {
 559         xcb_map_window(globalconf.connection, ev->window);
 560         xembed_window_activate(globalconf.connection, ev->window);
 561     }
 562     else if((c = client_getbywin(ev->window)))
 563     {
 564         /* Check that it may be visible, but not asked to be hidden */
 565         if(client_maybevisible(c) && !c->hidden)
 566         {
 567             luaA_object_push(globalconf.L, c);
 568             client_set_minimized(globalconf.L, -1, false);
 569             lua_pop(globalconf.L, 1);
 570             /* it will be raised, so just update ourself */
 571             client_raise(c);
 572         }
 573     }
 574     else
 575     {
 576         geom_c = xcb_get_geometry_unchecked(globalconf.connection, ev->window);
 577
 578         if(!(geom_r = xcb_get_geometry_reply(globalconf.connection, geom_c, NULL)))
 579         {
 580             goto bailout;
 581         }
 582
 583         client_manage(ev->window, geom_r, false);
 584
 585         p_delete(&geom_r);
 586     }
 587
 588 bailout:
 589     p_delete(&wa_r);
 590 }
 591
 592 /** The unmap notify event handler.
 593  * \param ev The event.
 594  */
 595 static void
 596 event_handle_unmapnotify(xcb_unmap_notify_event_t *ev)
 597 {
 598     client_t *c;
 599
 600     if((c = client_getbywin(ev->window)))
 601         client_unmanage(c, true);
 602     else
 603         for(int i = 0; i < globalconf.embedded.len; i++)
 604             if(globalconf.embedded.tab[i].win == ev->window)
 605             {
 606                 xembed_window_array_take(&globalconf.embedded, i);
 607                 xcb_change_save_set(globalconf.connection, XCB_SET_MODE_DELETE, ev->window);
 608                 luaA_systray_invalidate();
 609             }
 610 }
 611
 612 /** The randr screen change notify event handler.
 613  * \param ev The event.
 614  */
 615 static void
 616 event_handle_randr_screen_change_notify(xcb_randr_screen_change_notify_event_t *ev)
 617 {
 618     /* Code  of  XRRUpdateConfiguration Xlib  function  ported to  XCB
 619      * (only the code relevant  to RRScreenChangeNotify) as the latter
 620      * doesn't provide this kind of function */
 621     if(ev->rotation & (XCB_RANDR_ROTATION_ROTATE_90 | XCB_RANDR_ROTATION_ROTATE_270))
 622         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->height, ev->width,
 623                                   ev->mheight, ev->mwidth);
 624     else
 625         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->width, ev->height,
 626                                   ev->mwidth, ev->mheight);
 627
 628     /* XRRUpdateConfiguration also executes the following instruction
 629      * but it's not useful because SubpixelOrder is not used at all at
 630      * the moment
 631      *
 632      * XRenderSetSubpixelOrder(dpy, snum, scevent->subpixel_order);
 633      */
 634
 635     awesome_restart();
 636 }
 637
 638 /** The client message event handler.
 639  * \param ev The event.
 640  */
 641 static void
 642 event_handle_clientmessage(xcb_client_message_event_t *ev)
 643 {
 644     /* check for startup notification messages */
 645     if(sn_xcb_display_process_event(globalconf.sndisplay, (xcb_generic_event_t *) ev))
 646         return;
 647
 648     if(ev->type == WM_CHANGE_STATE)
 649     {
 650         client_t *c;
 651         if((c = client_getbywin(ev->window))
 652            && ev->format == 32
 653            && ev->data.data32[0] == XCB_ICCCM_WM_STATE_ICONIC)
 654         {
 655             luaA_object_push(globalconf.L, c);
 656             client_set_minimized(globalconf.L, -1, true);
 657             lua_pop(globalconf.L, 1);
 658         }
 659     }
 660     else if(ev->type == _XEMBED)
 661         xembed_process_client_message(ev);
 662     else if(ev->type == _NET_SYSTEM_TRAY_OPCODE)
 663         systray_process_client_message(ev);
 664     else
 665         ewmh_process_client_message(ev);
 666 }
 667
 668 /** The keymap change notify event handler.
 669  * \param ev The event.
 670  */
 671 static void
 672 event_handle_mappingnotify(xcb_mapping_notify_event_t *ev)
 673 {
 674     if(ev->request == XCB_MAPPING_MODIFIER
 675        || ev->request == XCB_MAPPING_KEYBOARD)
 676     {
 677         xcb_get_modifier_mapping_cookie_t xmapping_cookie =
 678             xcb_get_modifier_mapping_unchecked(globalconf.connection);
 679
 680         /* Free and then allocate the key symbols */
 681         xcb_key_symbols_free(globalconf.keysyms);
 682         globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
 683
 684         xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
 685                             globalconf.keysyms, &globalconf.numlockmask,
 686                             &globalconf.shiftlockmask, &globalconf.capslockmask,
 687                             &globalconf.modeswitchmask);
 688
 689         /* regrab everything */
 690         xcb_screen_t *s = globalconf.screen;
 691         /* yes XCB_BUTTON_MASK_ANY is also for grab_key even if it's look weird */
 692         xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, s->root, XCB_BUTTON_MASK_ANY);
 693         xwindow_grabkeys(s->root, &globalconf.keys);
 694
 695         foreach(_c, globalconf.clients)
 696         {
 697             client_t *c = *_c;
 698             xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, c->frame_window, XCB_BUTTON_MASK_ANY);
 699             xwindow_grabkeys(c->frame_window, &c->keys);
 700         }
 701     }
 702 }
 703
 704 static void
 705 event_handle_reparentnotify(xcb_reparent_notify_event_t *ev)
 706 {
 707     client_t *c;
 708
 709     if((c = client_getbywin(ev->window)) && c->frame_window != ev->parent)
 710     {
 711         /* Ignore reparents to the root window, they *might* be caused by
 712          * ourselves if a client quickly unmaps and maps itself again. */
 713         if (ev->parent != globalconf.screen->root)
 714             client_unmanage(c, true);
 715     }
 716 }
 717
 718 /** \brief awesome xerror function.
 719  * There's no way to check accesses to destroyed windows, thus those cases are
 720  * ignored (especially on UnmapNotify's).
 721  * \param e The error event.
 722  */
 723 static void
 724 xerror(xcb_generic_error_t *e)
 725 {
 726     /* ignore this */
 727     if(e->error_code == XCB_WINDOW
 728        || (e->error_code == XCB_MATCH
 729            && e->major_code == XCB_SET_INPUT_FOCUS)
 730        || (e->error_code == XCB_VALUE
 731            && e->major_code == XCB_KILL_CLIENT)
 732        || (e->error_code == XCB_MATCH
 733            && e->major_code == XCB_CONFIGURE_WINDOW))
 734         return;
 735
 736     warn("X error: request=%s, error=%s",
 737          xcb_event_get_request_label(e->major_code),
 738          xcb_event_get_error_label(e->error_code));
 739
 740     return;
 741 }
 742
 743 void event_handle(xcb_generic_event_t *event)
 744 {
 745     uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
 746
 747     if(response_type == 0)
 748     {
 749         /* This is an error, not a event */
 750         xerror((xcb_generic_error_t *) event);
 751         return;
 752     }
 753
 754     switch(response_type)
 755     {
 756 #define EVENT(type, callback) case type: callback((void *) event); return
 757         EVENT(XCB_BUTTON_PRESS, event_handle_button);
 758         EVENT(XCB_BUTTON_RELEASE, event_handle_button);
 759         EVENT(XCB_CONFIGURE_REQUEST, event_handle_configurerequest);
 760         EVENT(XCB_CONFIGURE_NOTIFY, event_handle_configurenotify);
 761         EVENT(XCB_DESTROY_NOTIFY, event_handle_destroynotify);
 762         EVENT(XCB_ENTER_NOTIFY, event_handle_enternotify);
 763         EVENT(XCB_CLIENT_MESSAGE, event_handle_clientmessage);
 764         EVENT(XCB_EXPOSE, event_handle_expose);
 765         EVENT(XCB_FOCUS_IN, event_handle_focusin);
 766         EVENT(XCB_KEY_PRESS, event_handle_key);
 767         EVENT(XCB_KEY_RELEASE, event_handle_key);
 768         EVENT(XCB_LEAVE_NOTIFY, event_handle_leavenotify);
 769         EVENT(XCB_MAPPING_NOTIFY, event_handle_mappingnotify);
 770         EVENT(XCB_MAP_REQUEST, event_handle_maprequest);
 771         EVENT(XCB_MOTION_NOTIFY, event_handle_motionnotify);
 772         EVENT(XCB_PROPERTY_NOTIFY, property_handle_propertynotify);
 773         EVENT(XCB_REPARENT_NOTIFY, event_handle_reparentnotify);
 774         EVENT(XCB_UNMAP_NOTIFY, event_handle_unmapnotify);
 775 #undef EVENT
 776     }
 777
 778     static uint8_t randr_screen_change_notify = 0;
 779
 780     if(randr_screen_change_notify == 0)
 781     {
 782         /* check for randr extension */
 783         const xcb_query_extension_reply_t *randr_query;
 784         randr_query = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
 785         if(randr_query->present)
 786             randr_screen_change_notify = randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
 787     }
 788
 789     if (response_type == randr_screen_change_notify)
 790         event_handle_randr_screen_change_notify((void *) event);
 791 }
 792
 793 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80