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      1 /*
      2  * Copyright  2013 Ran Benita
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     21  * DEALINGS IN THE SOFTWARE.
     22  */
     23 
     24 #include "x11-priv.h"
     25 
     26 static bool
     27 update_initial_state(struct xkb_state *state, xcb_connection_t *conn,
     28                      uint16_t device_id)
     29 {
     30     xcb_xkb_get_state_cookie_t cookie =
     31         xcb_xkb_get_state(conn, device_id);
     32     xcb_xkb_get_state_reply_t *reply =
     33         xcb_xkb_get_state_reply(conn, cookie, NULL);
     34 
     35     if (!reply)
     36         return false;
     37 
     38     xkb_state_update_mask(state,
     39                           reply->baseMods,
     40                           reply->latchedMods,
     41                           reply->lockedMods,
     42                           reply->baseGroup,
     43                           reply->latchedGroup,
     44                           reply->lockedGroup);
     45 
     46     free(reply);
     47     return true;
     48 }
     49 
     50 XKB_EXPORT struct xkb_state *
     51 xkb_x11_state_new_from_device(struct xkb_keymap *keymap,
     52                               xcb_connection_t *conn, int32_t device_id)
     53 {
     54     struct xkb_state *state;
     55 
     56     if (device_id < 0 || device_id > 255) {
     57         log_err_func(keymap->ctx, "illegal device ID: %d", device_id);
     58         return NULL;
     59     }
     60 
     61     state = xkb_state_new(keymap);
     62     if (!state)
     63         return NULL;
     64 
     65     if (!update_initial_state(state, conn, device_id)) {
     66         xkb_state_unref(state);
     67         return NULL;
     68     }
     69 
     70     return state;
     71 }
     72