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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @defgroup sysio SysIO
  30.  * @brief   HelenOS framebuffer emulation via kernel.
  31.  * @ingroup fbs
  32.  * @{
  33.  */
  34. /** @file
  35.  */
  36.  
  37. #include <async.h>
  38. #include <ipc/fb.h>
  39. #include <ipc/ipc.h>
  40. #include <libc.h>
  41. #include <errno.h>
  42. #include <string.h>
  43. #include <libc.h>
  44. #include <stdio.h>
  45.  
  46. #include "sysio.h"
  47.  
  48. #define WIDTH 80
  49. #define HEIGHT 25
  50.  
  51. /* Allow only 1 connection */
  52. static int client_connected = 0;
  53.  
  54. static void sysput(char c)
  55. {
  56.     __SYSCALL3(SYS_IO, 1, (sysarg_t)&c, (sysarg_t) 1);
  57. }
  58.  
  59. static void sysputs(char *s)
  60. {
  61.     while (*s) {
  62.         sysput(*(s++));
  63.     }
  64. //  __SYSCALL3(SYS_IO, 1, (sysarg_t)s, strlen(s));
  65. }
  66.  
  67. /** Send clearscreen sequence to console */
  68. static void clrscr(void)
  69. {
  70.     sysputs("\033[2J");
  71. }
  72.  
  73. /** Send ansi sequence to console to change cursor position */
  74. static void curs_goto(unsigned int row, unsigned int col)
  75. {
  76.     char control[20];
  77.  
  78.     if (row > 200 || col > 200)
  79.         return;
  80.  
  81.     snprintf(control, 20, "\033[%d;%df",row+1, col+1);
  82.     sysputs(control);
  83. }
  84.  
  85. static void set_style(int mode)
  86. {
  87.     char control[20];
  88.    
  89.     snprintf(control, 20, "\033[%dm", mode);
  90.     sysputs(control);
  91. }
  92.  
  93. static void scroll(int i)
  94. {
  95.     if (i > 0) {
  96.         curs_goto(HEIGHT-1, 0);
  97.         while (i--)
  98.             sysputs("\033D");
  99.     } else if (i < 0) {
  100.         curs_goto(0,0);
  101.         while (i++)
  102.             sysputs("\033M");
  103.     }
  104. }
  105.  
  106. /** ANSI terminal emulation main thread */
  107. static void sysio_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  108. {
  109.     int retval;
  110.     ipc_callid_t callid;
  111.     ipc_call_t call;
  112.     char c;
  113.     int lastcol=0;
  114.     int lastrow=0;
  115.     int newcol,newrow;
  116.     int fgcolor,bgcolor;
  117.     int i;
  118.  
  119.     if (client_connected) {
  120.         ipc_answer_fast(iid, ELIMIT, 0,0);
  121.         return;
  122.     }
  123.     client_connected = 1;
  124.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  125.     while (1) {
  126.         callid = async_get_call(&call);
  127.         switch (IPC_GET_METHOD(call)) {
  128.         case IPC_M_PHONE_HUNGUP:
  129.             client_connected = 0;
  130.             ipc_answer_fast(callid,0,0,0);
  131.             return; /* Exit thread */
  132.         case FB_PUTCHAR:
  133.             c = IPC_GET_ARG1(call);
  134.             newrow = IPC_GET_ARG2(call);
  135.             newcol = IPC_GET_ARG3(call);
  136.             if (lastcol != newcol || lastrow!=newrow)
  137.                 curs_goto(newrow, newcol);
  138.             lastcol = newcol + 1;
  139.             lastrow = newrow;
  140.             sysput(c);
  141.             retval = 0;
  142.             break;
  143.         case FB_CURSOR_GOTO:
  144.             newrow = IPC_GET_ARG1(call);
  145.             newcol = IPC_GET_ARG2(call);
  146.             curs_goto(newrow, newcol);
  147.             lastrow = newrow;
  148.             lastcol = newcol;
  149.             break;
  150.         case FB_GET_CSIZE:
  151.             ipc_answer_fast(callid, 0, HEIGHT, WIDTH);
  152.             continue;
  153.         case FB_CLEAR:
  154.             clrscr();
  155.             retval = 0;
  156.             break;
  157.         case FB_SET_STYLE:
  158.             fgcolor = IPC_GET_ARG1(call);
  159.             bgcolor = IPC_GET_ARG2(call);
  160.             if (fgcolor < bgcolor)
  161.                 set_style(0);
  162.             else
  163.                 set_style(7);
  164.             retval = 0;
  165.             break;
  166.         case FB_SCROLL:
  167.             i = IPC_GET_ARG1(call);
  168.             if (i > HEIGHT || i < -HEIGHT) {
  169.                 retval = EINVAL;
  170.                 break;
  171.             }
  172.             scroll(i);
  173.             curs_goto(lastrow, lastcol);
  174.             retval = 0;
  175.             break;
  176.  
  177.         default:
  178.             retval = ENOENT;
  179.         }
  180.         ipc_answer_fast(callid,retval,0,0);
  181.     }
  182. }
  183.  
  184. /** ANSI terminal emulation initialization */
  185. void sysio_init(void)
  186. {
  187.     async_set_client_connection(sysio_client_connection);
  188.     clrscr();
  189.     curs_goto(0,0);
  190.     /* Set scrolling region to 0-25 lines */
  191.     sysputs("\033[0;25r");
  192. }
  193.  
  194. /**
  195.  * @}
  196.  */
  197.  
  198.