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/*

 * Copyright (c) 2006 Ondrej Palkovsky

 * Copyright (c) 2008 Martin Decky

 * Copyright (c) 2008 Pavel Rimsky

 * 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.

 */

/**

 * @defgroup serial Serial console

 * @brief    Serial console services (putc, puts, clear screen, cursor goto,...)

 * @{

 */

/** @file

 */

#include <stdio.h>

#include <ipc/ipc.h>

#include <async.h>

#include <ipc/fb.h>

#include <bool.h>

#include <errno.h>

#include "serial_console.h"

#define MAX_CONTROL 20

static int width;

static int height;

static putc_function_t putc_function;

/* Allow only 1 connection */

static int client_connected = 0;

void serial_puts(char *str)

{

    while (*str)

        putc_function(*(str++));

}

void serial_goto(const unsigned int row, const unsigned int col)

{

    if ((row > height) || (col > width))

        return;

    char control[20];

    snprintf(control, 20, "\033[%u;%uf", row + 1, col + 1);

    serial_puts(control);

}

void serial_clrscr(void)

{

    serial_puts("\033[2J");

}

void serial_scroll(int i)

{

    if (i > 0) {

        serial_goto(height - 1, 0);

        while (i--)

            serial_puts("\033D");

    } else if (i < 0) {

        serial_goto(0, 0);

        while (i++)

            serial_puts("\033M");

    }

}

void serial_set_style(const unsigned int mode)

{

    char control[MAX_CONTROL];

    snprintf(control, MAX_CONTROL, "\033[%um", mode);

    serial_puts(control);

}

/** Set scrolling region. */

void serial_set_scroll_region(unsigned last_row)

{

    char control[MAX_CONTROL];

    snprintf(control, MAX_CONTROL, "\033[0;%ur", last_row);

    serial_puts(control);

}

void serial_cursor_disable(void)

{

    serial_puts("\033[?25l");

}

void serial_cursor_enable(void)

{

    serial_puts("\033[?25h");

}

void serial_console_init(putc_function_t putc_fn, uint32_t w, uint32_t h)

{

    width = w;

    height = h;

    putc_function = putc_fn;

}

/**

 * Main function of the thread serving client connections.

 */

void serial_client_connection(ipc_callid_t iid, ipc_call_t *icall)

{

    int retval;

    ipc_callid_t callid;

    ipc_call_t call;

    char c;

    int lastcol = 0;

    int lastrow = 0;

    int newcol;

    int newrow;

    int fgcolor;

    int bgcolor;

    int i;

    if (client_connected) {

        ipc_answer_0(iid, ELIMIT);

        return;

    }

    client_connected = 1;

    ipc_answer_0(iid, EOK);

    /* Clear the terminal, set scrolling region

       to 0 - height rows. */

    serial_clrscr();

    serial_goto(0, 0);

    serial_set_scroll_region(height);

    while (true) {

        callid = async_get_call(&call);

        switch (IPC_GET_METHOD(call)) {

        case IPC_M_PHONE_HUNGUP:

            client_connected = 0;

            ipc_answer_0(callid, EOK);

            return;

        case FB_PUTCHAR:

            c = IPC_GET_ARG1(call);

            newrow = IPC_GET_ARG2(call);

            newcol = IPC_GET_ARG3(call);

            if ((lastcol != newcol) || (lastrow != newrow))

                serial_goto(newrow, newcol);

            lastcol = newcol + 1;

            lastrow = newrow;

            (*putc_function)(c);

            retval = 0;

            break;

        case FB_CURSOR_GOTO:

            newrow = IPC_GET_ARG1(call);

            newcol = IPC_GET_ARG2(call);

            serial_goto(newrow, newcol);

            lastrow = newrow;

            lastcol = newcol;

            retval = 0;

            break;

        case FB_GET_CSIZE:

            ipc_answer_2(callid, EOK, height, width);

            continue;

        case FB_CLEAR:

            serial_clrscr();

            retval = 0;

            break;

        case FB_SET_STYLE:

            fgcolor = IPC_GET_ARG1(call);

            bgcolor = IPC_GET_ARG2(call);

            if (fgcolor < bgcolor)

                serial_set_style(0);

            else

                serial_set_style(7);

            retval = 0;

            break;

        case FB_SCROLL:

            i = IPC_GET_ARG1(call);

            if ((i > height) || (i < -height)) {

                retval = EINVAL;

                break;

            }

            serial_scroll(i);

            serial_goto(lastrow, lastcol);

            retval = 0;

            break;

        case FB_CURSOR_VISIBILITY:

            if(IPC_GET_ARG1(call))

                serial_cursor_enable();

            else

                serial_cursor_disable();

            retval = 0;

            break;

        default:

            retval = ENOENT;

        }

        ipc_answer_0(callid, retval);

    }

}

/**

 * @}

 */