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(XCB_EVENT_RESPONSE_TYPE(ev))
 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 + drawin->border_width;
 187             ev->event_y -= drawin->geometry.y + drawin->border_width;
 188         }
 189
 190         /* Push the drawable */
 191         luaA_object_push(globalconf.L, drawin);
 192         luaA_object_push_item(globalconf.L, -1, drawin->drawable);
 193         /* and handle the button raw button event */
 194         event_emit_button(ev);
 195         lua_pop(globalconf.L, 1);
 196         /* check if any button object matches */
 197         event_button_callback(ev, &drawin->buttons, -1, 1, NULL);
 198     }
 199     else if((c = client_getbyframewin(ev->event)))
 200     {
 201         luaA_object_push(globalconf.L, c);
 202         /* And handle the button raw button event */
 203         event_emit_button(ev);
 204         /* then check if a titlebar was "hit" */
 205         int x = ev->event_x, y = ev->event_y;
 206         drawable_t *d = client_get_drawable_offset(c, &x, &y);
 207         if (d)
 208         {
 209             /* Copy the event so that we can fake x/y */
 210             xcb_button_press_event_t event = *ev;
 211             event.event_x = x;
 212             event.event_y = y;
 213             luaA_object_push_item(globalconf.L, -1, d);
 214             event_emit_button(&event);
 215             lua_pop(globalconf.L, 1);
 216         }
 217         /* then check if any button objects match */
 218         event_button_callback(ev, &c->buttons, -1, 1, NULL);
 219         xcb_allow_events(globalconf.connection,
 220                          XCB_ALLOW_REPLAY_POINTER,
 221                          XCB_CURRENT_TIME);
 222     }
 223     else if(ev->child == XCB_NONE)
 224         if(globalconf.screen->root == ev->event)
 225         {
 226             event_button_callback(ev, &globalconf.buttons, 0, 0, NULL);
 227             return;
 228         }
 229 }
 230
 231 static void
 232 event_handle_configurerequest_configure_window(xcb_configure_request_event_t *ev)
 233 {
 234     uint16_t config_win_mask = 0;
 235     uint32_t config_win_vals[7];
 236     unsigned short i = 0;
 237
 238     if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 239     {
 240         config_win_mask |= XCB_CONFIG_WINDOW_X;
 241         config_win_vals[i++] = ev->x;
 242     }
 243     if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 244     {
 245         config_win_mask |= XCB_CONFIG_WINDOW_Y;
 246         config_win_vals[i++] = ev->y;
 247     }
 248     if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 249     {
 250         config_win_mask |= XCB_CONFIG_WINDOW_WIDTH;
 251         config_win_vals[i++] = ev->width;
 252     }
 253     if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 254     {
 255         config_win_mask |= XCB_CONFIG_WINDOW_HEIGHT;
 256         config_win_vals[i++] = ev->height;
 257     }
 258     if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 259     {
 260         config_win_mask |= XCB_CONFIG_WINDOW_BORDER_WIDTH;
 261         config_win_vals[i++] = ev->border_width;
 262     }
 263     if(ev->value_mask & XCB_CONFIG_WINDOW_SIBLING)
 264     {
 265         config_win_mask |= XCB_CONFIG_WINDOW_SIBLING;
 266         config_win_vals[i++] = ev->sibling;
 267     }
 268     if(ev->value_mask & XCB_CONFIG_WINDOW_STACK_MODE)
 269     {
 270         config_win_mask |= XCB_CONFIG_WINDOW_STACK_MODE;
 271         config_win_vals[i++] = ev->stack_mode;
 272     }
 273
 274     xcb_configure_window(globalconf.connection, ev->window, config_win_mask, config_win_vals);
 275 }
 276
 277 /** The configure event handler.
 278  * \param ev The event.
 279  */
 280 static void
 281 event_handle_configurerequest(xcb_configure_request_event_t *ev)
 282 {
 283     client_t *c;
 284
 285     if((c = client_getbywin(ev->window)))
 286     {
 287         area_t geometry = c->geometry;
 288
 289         if(ev->value_mask & XCB_CONFIG_WINDOW_X)
 290             geometry.x = ev->x;
 291         if(ev->value_mask & XCB_CONFIG_WINDOW_Y)
 292             geometry.y = ev->y;
 293         if(ev->value_mask & XCB_CONFIG_WINDOW_WIDTH)
 294             geometry.width = ev->width;
 295         if(ev->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
 296             geometry.height = ev->height;
 297
 298         if(ev->value_mask & XCB_CONFIG_WINDOW_BORDER_WIDTH)
 299         {
 300             luaA_object_push(globalconf.L, c);
 301             window_set_border_width(globalconf.L, -1, ev->border_width);
 302             lua_pop(globalconf.L, 1);
 303         }
 304
 305         if(!client_resize(c, geometry, false))
 306             /* ICCCM 4.1.5 / 4.2.3, if nothing was changed, send an event saying so */
 307             client_send_configure(c);
 308     }
 309     else
 310         event_handle_configurerequest_configure_window(ev);
 311 }
 312
 313 /** The configure notify event handler.
 314  * \param ev The event.
 315  */
 316 static void
 317 event_handle_configurenotify(xcb_configure_notify_event_t *ev)
 318 {
 319     const xcb_screen_t *screen = globalconf.screen;
 320
 321     if(ev->window == screen->root
 322        && (ev->width != screen->width_in_pixels
 323            || ev->height != screen->height_in_pixels))
 324         /* it's not that we panic, but restart */
 325         awesome_restart();
 326 }
 327
 328 /** The destroy notify event handler.
 329  * \param ev The event.
 330  */
 331 static void
 332 event_handle_destroynotify(xcb_destroy_notify_event_t *ev)
 333 {
 334     client_t *c;
 335
 336     if((c = client_getbywin(ev->window)))
 337         client_unmanage(c, false);
 338     else
 339         for(int i = 0; i < globalconf.embedded.len; i++)
 340             if(globalconf.embedded.tab[i].win == ev->window)
 341             {
 342                 xembed_window_array_take(&globalconf.embedded, i);
 343                 luaA_systray_invalidate();
 344             }
 345 }
 346
 347 /** The motion notify event handler.
 348  * \param ev The event.
 349  */
 350 static void
 351 event_handle_motionnotify(xcb_motion_notify_event_t *ev)
 352 {
 353     drawin_t *w;
 354     client_t *c;
 355
 356     globalconf.timestamp = ev->time;
 357
 358     if(event_handle_mousegrabber(ev->root_x, ev->root_y, ev->state))
 359         return;
 360
 361     if((c = client_getbyframewin(ev->event)))
 362     {
 363         luaA_object_push(globalconf.L, c);
 364         lua_pushnumber(globalconf.L, ev->event_x);
 365         lua_pushnumber(globalconf.L, ev->event_y);
 366         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 367
 368         /* now check if a titlebar was "hit" */
 369         int x = ev->event_x, y = ev->event_y;
 370         drawable_t *d = client_get_drawable_offset(c, &x, &y);
 371         if (d)
 372         {
 373             luaA_object_push_item(globalconf.L, -1, d);
 374             lua_pushnumber(globalconf.L, x);
 375             lua_pushnumber(globalconf.L, y);
 376             luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 377             lua_pop(globalconf.L, 1);
 378         }
 379         lua_pop(globalconf.L, 1);
 380     }
 381
 382     if((w = drawin_getbywin(ev->event)))
 383     {
 384         luaA_object_push(globalconf.L, w);
 385         luaA_object_push_item(globalconf.L, -1, w->drawable);
 386         lua_pushnumber(globalconf.L, ev->event_x);
 387         lua_pushnumber(globalconf.L, ev->event_y);
 388         luaA_object_emit_signal(globalconf.L, -3, "mouse::move", 2);
 389         lua_pop(globalconf.L, 2);
 390     }
 391 }
 392
 393 /** The leave notify event handler.
 394  * \param ev The event.
 395  */
 396 static void
 397 event_handle_leavenotify(xcb_leave_notify_event_t *ev)
 398 {
 399     drawin_t *drawin;
 400     client_t *c;
 401
 402     globalconf.timestamp = ev->time;
 403
 404     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 405         return;
 406
 407     if((c = client_getbyframewin(ev->event)))
 408     {
 409         luaA_object_push(globalconf.L, c);
 410         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 411         drawable_t *d = client_get_drawable(c, ev->event_x, ev->event_y);
 412         if (d)
 413         {
 414             luaA_object_push_item(globalconf.L, -1, d);
 415             luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 416             lua_pop(globalconf.L, 1);
 417         }
 418         lua_pop(globalconf.L, 1);
 419     }
 420
 421     if((drawin = drawin_getbywin(ev->event)))
 422     {
 423         luaA_object_push(globalconf.L, drawin);
 424         luaA_object_push_item(globalconf.L, -1, drawin->drawable);
 425         luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
 426         lua_pop(globalconf.L, 2);
 427     }
 428 }
 429
 430 /** The enter notify event handler.
 431  * \param ev The event.
 432  */
 433 static void
 434 event_handle_enternotify(xcb_enter_notify_event_t *ev)
 435 {
 436     client_t *c;
 437     drawin_t *drawin;
 438
 439     globalconf.timestamp = ev->time;
 440
 441     if(ev->mode != XCB_NOTIFY_MODE_NORMAL)
 442         return;
 443
 444     if((drawin = drawin_getbywin(ev->event)))
 445     {
 446         luaA_object_push(globalconf.L, drawin);
 447         luaA_object_push_item(globalconf.L, -1, drawin->drawable);
 448         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 449         lua_pop(globalconf.L, 2);
 450     }
 451
 452     if((c = client_getbyframewin(ev->event)))
 453     {
 454         luaA_object_push(globalconf.L, c);
 455         luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 456         drawable_t *d = client_get_drawable(c, ev->event_x, ev->event_y);
 457         if (d)
 458         {
 459             luaA_object_push_item(globalconf.L, -1, d);
 460             luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
 461             lua_pop(globalconf.L, 1);
 462         }
 463         lua_pop(globalconf.L, 1);
 464     }
 465 }
 466
 467 /** The focus in event handler.
 468  * \param ev The event.
 469  */
 470 static void
 471 event_handle_focusin(xcb_focus_in_event_t *ev)
 472 {
 473     if (ev->mode == XCB_NOTIFY_MODE_GRAB
 474             || ev->mode == XCB_NOTIFY_MODE_UNGRAB)
 475         /* Ignore focus changes due to keyboard grabs */
 476         return;
 477
 478     /* Events that we are interested in: */
 479     switch(ev->detail)
 480     {
 481         /* These are events that jump between root windows.
 482          */
 483         case XCB_NOTIFY_DETAIL_ANCESTOR:
 484         case XCB_NOTIFY_DETAIL_INFERIOR:
 485
 486         /* These are events that jump between clients.
 487          * Virtual events ensure we always get an event on our top-level window.
 488          */
 489         case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
 490         case XCB_NOTIFY_DETAIL_NONLINEAR:
 491           {
 492             client_t *c;
 493
 494             if((c = client_getbywin(ev->event))) {
 495                 /* If there is still a pending focus change, do it now. */
 496                 client_focus_refresh();
 497                 client_focus_update(c);
 498             }
 499           }
 500         /* all other events are ignored */
 501         default:
 502             break;
 503     }
 504 }
 505
 506 /** The expose event handler.
 507  * \param ev The event.
 508  */
 509 static void
 510 event_handle_expose(xcb_expose_event_t *ev)
 511 {
 512     drawin_t *drawin;
 513     client_t *client;
 514
 515     if((drawin = drawin_getbywin(ev->window)))
 516         drawin_refresh_pixmap_partial(drawin,
 517                                       ev->x, ev->y,
 518                                       ev->width, ev->height);
 519     if ((client = client_getbyframewin(ev->window)))
 520         client_refresh(client);
 521 }
 522
 523 /** The key press event handler.
 524  * \param ev The event.
 525  */
 526 static void
 527 event_handle_key(xcb_key_press_event_t *ev)
 528 {
 529     globalconf.timestamp = ev->time;
 530
 531     if(globalconf.keygrabber != LUA_REFNIL)
 532     {
 533         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.keygrabber);
 534         if(keygrabber_handlekpress(globalconf.L, ev))
 535         {
 536             if(lua_pcall(globalconf.L, 3, 1, 0))
 537             {
 538                 warn("error running function: %s", lua_tostring(globalconf.L, -1));
 539                 luaA_keygrabber_stop(globalconf.L);
 540             }
 541         }
 542         lua_pop(globalconf.L, 1);  /* pop returned value or function if not called */
 543     }
 544     else
 545     {
 546         /* get keysym ignoring all modifiers */
 547         xcb_keysym_t keysym = keyresolv_get_keysym(ev->detail, 0);
 548         client_t *c;
 549         if((c = client_getbyframewin(ev->event)))
 550         {
 551             luaA_object_push(globalconf.L, c);
 552             event_key_callback(ev, &c->keys, -1, 1, &keysym);
 553         }
 554         else
 555             event_key_callback(ev, &globalconf.keys, 0, 0, &keysym);
 556     }
 557 }
 558
 559 /** The map request event handler.
 560  * \param ev The event.
 561  */
 562 static void
 563 event_handle_maprequest(xcb_map_request_event_t *ev)
 564 {
 565     client_t *c;
 566     xcb_get_window_attributes_cookie_t wa_c;
 567     xcb_get_window_attributes_reply_t *wa_r;
 568     xcb_get_geometry_cookie_t geom_c;
 569     xcb_get_geometry_reply_t *geom_r;
 570
 571     wa_c = xcb_get_window_attributes_unchecked(globalconf.connection, ev->window);
 572
 573     if(!(wa_r = xcb_get_window_attributes_reply(globalconf.connection, wa_c, NULL)))
 574         return;
 575
 576     if(wa_r->override_redirect)
 577         goto bailout;
 578
 579     if(xembed_getbywin(&globalconf.embedded, ev->window))
 580     {
 581         xcb_map_window(globalconf.connection, ev->window);
 582         xembed_window_activate(globalconf.connection, ev->window);
 583     }
 584     else if((c = client_getbywin(ev->window)))
 585     {
 586         /* Check that it may be visible, but not asked to be hidden */
 587         if(client_maybevisible(c) && !c->hidden)
 588         {
 589             luaA_object_push(globalconf.L, c);
 590             client_set_minimized(globalconf.L, -1, false);
 591             lua_pop(globalconf.L, 1);
 592             /* it will be raised, so just update ourself */
 593             client_raise(c);
 594         }
 595     }
 596     else
 597     {
 598         geom_c = xcb_get_geometry_unchecked(globalconf.connection, ev->window);
 599
 600         if(!(geom_r = xcb_get_geometry_reply(globalconf.connection, geom_c, NULL)))
 601         {
 602             goto bailout;
 603         }
 604
 605         client_manage(ev->window, geom_r, false);
 606
 607         p_delete(&geom_r);
 608     }
 609
 610 bailout:
 611     p_delete(&wa_r);
 612 }
 613
 614 /** The unmap notify event handler.
 615  * \param ev The event.
 616  */
 617 static void
 618 event_handle_unmapnotify(xcb_unmap_notify_event_t *ev)
 619 {
 620     client_t *c;
 621
 622     if((c = client_getbywin(ev->window)))
 623         client_unmanage(c, true);
 624     else
 625         for(int i = 0; i < globalconf.embedded.len; i++)
 626             if(globalconf.embedded.tab[i].win == ev->window)
 627             {
 628                 xembed_window_array_take(&globalconf.embedded, i);
 629                 xcb_change_save_set(globalconf.connection, XCB_SET_MODE_DELETE, ev->window);
 630                 luaA_systray_invalidate();
 631             }
 632 }
 633
 634 /** The randr screen change notify event handler.
 635  * \param ev The event.
 636  */
 637 static void
 638 event_handle_randr_screen_change_notify(xcb_randr_screen_change_notify_event_t *ev)
 639 {
 640     /* Code  of  XRRUpdateConfiguration Xlib  function  ported to  XCB
 641      * (only the code relevant  to RRScreenChangeNotify) as the latter
 642      * doesn't provide this kind of function */
 643     if(ev->rotation & (XCB_RANDR_ROTATION_ROTATE_90 | XCB_RANDR_ROTATION_ROTATE_270))
 644         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->height, ev->width,
 645                                   ev->mheight, ev->mwidth);
 646     else
 647         xcb_randr_set_screen_size(globalconf.connection, ev->root, ev->width, ev->height,
 648                                   ev->mwidth, ev->mheight);
 649
 650     /* XRRUpdateConfiguration also executes the following instruction
 651      * but it's not useful because SubpixelOrder is not used at all at
 652      * the moment
 653      *
 654      * XRenderSetSubpixelOrder(dpy, snum, scevent->subpixel_order);
 655      */
 656
 657     awesome_restart();
 658 }
 659
 660 /** The client message event handler.
 661  * \param ev The event.
 662  */
 663 static void
 664 event_handle_clientmessage(xcb_client_message_event_t *ev)
 665 {
 666     /* check for startup notification messages */
 667     if(sn_xcb_display_process_event(globalconf.sndisplay, (xcb_generic_event_t *) ev))
 668         return;
 669
 670     if(ev->type == WM_CHANGE_STATE)
 671     {
 672         client_t *c;
 673         if((c = client_getbywin(ev->window))
 674            && ev->format == 32
 675            && ev->data.data32[0] == XCB_ICCCM_WM_STATE_ICONIC)
 676         {
 677             luaA_object_push(globalconf.L, c);
 678             client_set_minimized(globalconf.L, -1, true);
 679             lua_pop(globalconf.L, 1);
 680         }
 681     }
 682     else if(ev->type == _XEMBED)
 683         xembed_process_client_message(ev);
 684     else if(ev->type == _NET_SYSTEM_TRAY_OPCODE)
 685         systray_process_client_message(ev);
 686     else
 687         ewmh_process_client_message(ev);
 688 }
 689
 690 /** The keymap change notify event handler.
 691  * \param ev The event.
 692  */
 693 static void
 694 event_handle_mappingnotify(xcb_mapping_notify_event_t *ev)
 695 {
 696     if(ev->request == XCB_MAPPING_MODIFIER
 697        || ev->request == XCB_MAPPING_KEYBOARD)
 698     {
 699         xcb_get_modifier_mapping_cookie_t xmapping_cookie =
 700             xcb_get_modifier_mapping_unchecked(globalconf.connection);
 701
 702         /* Free and then allocate the key symbols */
 703         xcb_key_symbols_free(globalconf.keysyms);
 704         globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
 705
 706         xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
 707                             globalconf.keysyms, &globalconf.numlockmask,
 708                             &globalconf.shiftlockmask, &globalconf.capslockmask,
 709                             &globalconf.modeswitchmask);
 710
 711         /* regrab everything */
 712         xcb_screen_t *s = globalconf.screen;
 713         /* yes XCB_BUTTON_MASK_ANY is also for grab_key even if it's look weird */
 714         xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, s->root, XCB_BUTTON_MASK_ANY);
 715         xwindow_grabkeys(s->root, &globalconf.keys);
 716
 717         foreach(_c, globalconf.clients)
 718         {
 719             client_t *c = *_c;
 720             xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, c->frame_window, XCB_BUTTON_MASK_ANY);
 721             xwindow_grabkeys(c->frame_window, &c->keys);
 722         }
 723     }
 724 }
 725
 726 static void
 727 event_handle_reparentnotify(xcb_reparent_notify_event_t *ev)
 728 {
 729     client_t *c;
 730
 731     if((c = client_getbywin(ev->window)) && c->frame_window != ev->parent)
 732     {
 733         /* Ignore reparents to the root window, they *might* be caused by
 734          * ourselves if a client quickly unmaps and maps itself again. */
 735         if (ev->parent != globalconf.screen->root)
 736             client_unmanage(c, true);
 737     }
 738 }
 739
 740 /** \brief awesome xerror function.
 741  * There's no way to check accesses to destroyed windows, thus those cases are
 742  * ignored (especially on UnmapNotify's).
 743  * \param e The error event.
 744  */
 745 static void
 746 xerror(xcb_generic_error_t *e)
 747 {
 748     /* ignore this */
 749     if(e->error_code == XCB_WINDOW
 750        || (e->error_code == XCB_MATCH
 751            && e->major_code == XCB_SET_INPUT_FOCUS)
 752        || (e->error_code == XCB_VALUE
 753            && e->major_code == XCB_KILL_CLIENT)
 754        || (e->error_code == XCB_MATCH
 755            && e->major_code == XCB_CONFIGURE_WINDOW))
 756         return;
 757
 758     warn("X error: request=%s (major %d, minor %d), error=%s (%d)",
 759          xcb_event_get_request_label(e->major_code),
 760          e->major_code, e->minor_code,
 761          xcb_event_get_error_label(e->error_code),
 762          e->error_code);
 763
 764     return;
 765 }
 766
 767 void event_handle(xcb_generic_event_t *event)
 768 {
 769     uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
 770
 771     if(response_type == 0)
 772     {
 773         /* This is an error, not a event */
 774         xerror((xcb_generic_error_t *) event);
 775         return;
 776     }
 777
 778     switch(response_type)
 779     {
 780 #define EVENT(type, callback) case type: callback((void *) event); return
 781         EVENT(XCB_BUTTON_PRESS, event_handle_button);
 782         EVENT(XCB_BUTTON_RELEASE, event_handle_button);
 783         EVENT(XCB_CONFIGURE_REQUEST, event_handle_configurerequest);
 784         EVENT(XCB_CONFIGURE_NOTIFY, event_handle_configurenotify);
 785         EVENT(XCB_DESTROY_NOTIFY, event_handle_destroynotify);
 786         EVENT(XCB_ENTER_NOTIFY, event_handle_enternotify);
 787         EVENT(XCB_CLIENT_MESSAGE, event_handle_clientmessage);
 788         EVENT(XCB_EXPOSE, event_handle_expose);
 789         EVENT(XCB_FOCUS_IN, event_handle_focusin);
 790         EVENT(XCB_KEY_PRESS, event_handle_key);
 791         EVENT(XCB_KEY_RELEASE, event_handle_key);
 792         EVENT(XCB_LEAVE_NOTIFY, event_handle_leavenotify);
 793         EVENT(XCB_MAPPING_NOTIFY, event_handle_mappingnotify);
 794         EVENT(XCB_MAP_REQUEST, event_handle_maprequest);
 795         EVENT(XCB_MOTION_NOTIFY, event_handle_motionnotify);
 796         EVENT(XCB_PROPERTY_NOTIFY, property_handle_propertynotify);
 797         EVENT(XCB_REPARENT_NOTIFY, event_handle_reparentnotify);
 798         EVENT(XCB_UNMAP_NOTIFY, event_handle_unmapnotify);
 799 #undef EVENT
 800     }
 801
 802     static uint8_t randr_screen_change_notify = 0;
 803
 804     if(randr_screen_change_notify == 0)
 805     {
 806         /* check for randr extension */
 807         const xcb_query_extension_reply_t *randr_query;
 808         randr_query = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
 809         if(randr_query->present)
 810             randr_screen_change_notify = randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
 811     }
 812
 813     if (response_type == randr_screen_change_notify)
 814         event_handle_randr_screen_change_notify((void *) event);
 815 }
 816
 817 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80