xref: /aosp_15_r20/external/libxkbcommon/src/x11/state.c (revision 2b949d0487e80d67f1fda82db69e101e761f8064)

/*
 * Copyright © 2013 Ran Benita
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include "config.h"

#include "x11-priv.h"

static bool
update_initial_state(struct xkb_state *state, xcb_connection_t *conn,
                     uint16_t device_id)
{
    xcb_xkb_get_state_cookie_t cookie =
        xcb_xkb_get_state(conn, device_id);
    xcb_xkb_get_state_reply_t *reply =
        xcb_xkb_get_state_reply(conn, cookie, NULL);

    if (!reply)
        return false;

    xkb_state_update_mask(state,
                          reply->baseMods,
                          reply->latchedMods,
                          reply->lockedMods,
                          reply->baseGroup,
                          reply->latchedGroup,
                          reply->lockedGroup);

    free(reply);
    return true;
}

XKB_EXPORT struct xkb_state *
xkb_x11_state_new_from_device(struct xkb_keymap *keymap,
                              xcb_connection_t *conn, int32_t device_id)
{
    struct xkb_state *state;

    if (device_id < 0 || device_id > 255) {
        log_err_func(keymap->ctx, "illegal device ID: %d", device_id);
        return NULL;
    }

    state = xkb_state_new(keymap);
    if (!state)
        return NULL;

    if (!update_initial_state(state, conn, device_id)) {
        xkb_state_unref(state);
        return NULL;
    }

    return state;
}