Subversion Repositories HelenOS

/*
 * 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 <console/style.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");
    }
}

/** ECMA-48 Set Graphics Rendition. */
static void serial_sgr(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 style;
    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:
            style =  IPC_GET_ARG1(call);
            if (style == STYLE_EMPHASIS)
                serial_sgr(1);
            else
                serial_sgr(0);
            retval = 0;
            break;
        case FB_SET_COLOR:
            fgcolor = IPC_GET_ARG1(call);
            bgcolor = IPC_GET_ARG2(call);
            if (fgcolor < bgcolor)
                serial_sgr(0);
            else
                serial_sgr(7);
            retval = 0;
            break;
        case FB_SET_RGB_COLOR:
            fgcolor = IPC_GET_ARG1(call);
            bgcolor = IPC_GET_ARG2(call);
            if (fgcolor < bgcolor)
                serial_sgr(0);
            else
                serial_sgr(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);
    }
}

/** 
 * @}
 */