Subversion Repositories HelenOS

/*

 * Copyright (c) 2006 Ondrej Palkovsky

 * 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 sysio SysIO

 * @brief   HelenOS framebuffer emulation via kernel.

 * @ingroup fbs

 * @{

 */

/** @file

 */

#include <async.h>

#include <ipc/fb.h>

#include <ipc/ipc.h>

#include <libc.h>

#include <errno.h>

#include <string.h>

#include <libc.h>

#include <stdio.h>

#include "sysio.h"

#define WIDTH 80

#define HEIGHT 25

/* Allow only 1 connection */

static int client_connected = 0;

static void sysput(char c)

{

    __SYSCALL3(SYS_IO, 1, (sysarg_t)&c, (sysarg_t) 1);

}

static void sysputs(char *s)

{

    while (*s) {

        sysput(*(s++));

    }

//  __SYSCALL3(SYS_IO, 1, (sysarg_t)s, strlen(s));

}

/** Send clearscreen sequence to console */

static void clrscr(void)

{

    sysputs("\033[2J");

}

/** Send ansi sequence to console to change cursor position */

static void curs_goto(unsigned int row, unsigned int col)

{

    char control[20];

    if (row > 200 || col > 200)

        return;

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

    sysputs(control);

}

static void set_style(int mode)

{

    char control[20];

    snprintf(control, 20, "\033[%dm", mode);

    sysputs(control);

}

static void scroll(int i)

{

    if (i > 0) {

        curs_goto(HEIGHT-1, 0);

        while (i--)

            sysputs("\033D");

    } else if (i < 0) {

        curs_goto(0,0);

        while (i++)

            sysputs("\033M");

    }

}

/** ANSI terminal emulation main thread */

static void sysio_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,newrow;

    int fgcolor,bgcolor;

    int i;

    if (client_connected) {

        ipc_answer_fast(iid, ELIMIT, 0,0);

        return;

    }

    client_connected = 1;

    ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */

    while (1) {

        callid = async_get_call(&call);

        switch (IPC_GET_METHOD(call)) {

            case IPC_M_PHONE_HUNGUP:

                client_connected = 0;

                ipc_answer_fast(callid, 0, 0, 0);

                return; /* Exit thread */

            case FB_PUTCHAR:

                c = IPC_GET_ARG1(call);

                newrow = IPC_GET_ARG2(call);

                newcol = IPC_GET_ARG3(call);

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

                    curs_goto(newrow, newcol);

                lastcol = newcol + 1;

                lastrow = newrow;

                sysput(c);

                retval = 0;

                break;

            case FB_CURSOR_GOTO:

                newrow = IPC_GET_ARG1(call);

                newcol = IPC_GET_ARG2(call);

                curs_goto(newrow, newcol);

                lastrow = newrow;

                lastcol = newcol;

                retval = 0;

                break;

            case FB_GET_CSIZE:

                ipc_answer_fast(callid, 0, HEIGHT, WIDTH);

                continue;

            case FB_CLEAR:

                clrscr();

                retval = 0;

                break;

            case FB_SET_STYLE:

                fgcolor = IPC_GET_ARG1(call);

                bgcolor = IPC_GET_ARG2(call);

                if (fgcolor < bgcolor)

                    set_style(0);

                else

                    set_style(7);

                retval = 0;

                break;

            case FB_SCROLL:

                i = IPC_GET_ARG1(call);

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

                    retval = EINVAL;

                    break;

                }

                scroll(i);

                curs_goto(lastrow, lastcol);

                retval = 0;

                break;

            default:

                retval = ENOENT;

        }

        ipc_answer_fast(callid, retval, 0, 0);

    }

}

/** ANSI terminal emulation initialization */

void sysio_init(void)

{

    async_set_client_connection(sysio_client_connection);

    clrscr();

    curs_goto(0,0);

    /* Set scrolling region to 0-25 lines */

    sysputs("\033[0;25r");

}

/**

 * @}

 */