source: mainline/uspace/lib/c/generic/io/input.c@ 74fec95

/*
 * Copyright (c) 2012 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */
/**
 * @file
 * @brief Input protocol client stub
 */

#include <async.h>
#include <assert.h>
#include <errno.h>
#include <io/kbd_event.h>
#include <io/input.h>
#include <ipc/input.h>
#include <stdlib.h>

static void input_cb_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg);

int input_open(async_sess_t *sess, input_ev_ops_t *ev_ops,
    void *arg, input_t **rinput)
{
        input_t *input = calloc(1, sizeof(input_t));
        if (input == NULL)
                return ENOMEM;

        input->sess = sess;
        input->ev_ops = ev_ops;
        input->user = arg;

        async_exch_t *exch = async_exchange_begin(sess);

        int rc = async_connect_to_me(exch, 0, 0, 0, input_cb_conn, input);
        async_exchange_end(exch);

        if (rc != EOK)
                goto error;

        *rinput = input;
        return EOK;

error:
        if (input != NULL)
                free(input);

        return rc;
}

void input_close(input_t *input)
{
        /* XXX Synchronize with input_cb_conn */
        free(input);
}

int input_yield(input_t *input)
{
        async_exch_t *exch = async_exchange_begin(input->sess);

        int rc = async_req_0_0(exch, INPUT_YIELD);
        async_exchange_end(exch);

        return rc;
}

int input_reclaim(input_t *input)
{
        async_exch_t *exch = async_exchange_begin(input->sess);

        int rc = async_req_0_0(exch, INPUT_RECLAIM);
        async_exchange_end(exch);

        return rc;
}

static void input_ev_key(input_t *input, ipc_callid_t callid,
    ipc_call_t *call)
{
        kbd_event_type_t type;
        keycode_t key;
        keymod_t mods;
        wchar_t c;
        int rc;

        type = IPC_GET_ARG1(*call);
        key = IPC_GET_ARG2(*call);
        mods = IPC_GET_ARG3(*call);
        c = IPC_GET_ARG4(*call);

        rc = input->ev_ops->key(input, type, key, mods, c);
        async_answer_0(callid, rc);
}

static void input_ev_move(input_t *input, ipc_callid_t callid,
    ipc_call_t *call)
{
        int dx;
        int dy;
        int rc;

        dx = IPC_GET_ARG1(*call);
        dy = IPC_GET_ARG2(*call);

        rc = input->ev_ops->move(input, dx, dy);
        async_answer_0(callid, rc);
}

static void input_ev_abs_move(input_t *input, ipc_callid_t callid,
    ipc_call_t *call)
{
        unsigned x;
        unsigned y;
        unsigned max_x;
        unsigned max_y;
        int rc;

        x = IPC_GET_ARG1(*call);
        y = IPC_GET_ARG2(*call);
        max_x = IPC_GET_ARG3(*call);
        max_y = IPC_GET_ARG4(*call);

        rc = input->ev_ops->abs_move(input, x, y, max_x, max_y);
        async_answer_0(callid, rc);
}

static void input_ev_button(input_t *input, ipc_callid_t callid,
    ipc_call_t *call)
{
        int bnum;
        int press;
        int rc;

        bnum = IPC_GET_ARG1(*call);
        press = IPC_GET_ARG2(*call);

        rc = input->ev_ops->button(input, bnum, press);
        async_answer_0(callid, rc);
}

static void input_cb_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg)
{
        input_t *input = (input_t *)arg;

        while (true) {
                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);

                if (!IPC_GET_IMETHOD(call)) {
                        /* TODO: Handle hangup */
                        return;
                }

                switch (IPC_GET_IMETHOD(call)) {
                case INPUT_EVENT_KEY:
                        input_ev_key(input, callid, &call);
                        break;
                case INPUT_EVENT_MOVE:
                        input_ev_move(input, callid, &call);
                        break;
                case INPUT_EVENT_ABS_MOVE:
                        input_ev_abs_move(input, callid, &call);
                        break;
                case INPUT_EVENT_BUTTON:
                        input_ev_button(input, callid, &call);
                        break;
                default:
                        async_answer_0(callid, ENOTSUP);
                }
        }
}

/** @}
 */