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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.    
  124.     client_connected = 1;
  125.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  126.     while (1) {
  127.         callid = async_get_call(&call);
  128.         switch (IPC_GET_METHOD(call)) {
  129.             case IPC_M_PHONE_HUNGUP:
  130.                 client_connected = 0;
  131.                 ipc_answer_fast(callid, 0, 0, 0);
  132.                 return; /* Exit thread */
  133.             case FB_PUTCHAR:
  134.                 c = IPC_GET_ARG1(call);
  135.                 newrow = IPC_GET_ARG2(call);
  136.                 newcol = IPC_GET_ARG3(call);
  137.                 if ((lastcol != newcol) || (lastrow != newrow))
  138.                     curs_goto(newrow, newcol);
  139.                 lastcol = newcol + 1;
  140.                 lastrow = newrow;
  141.                 sysput(c);
  142.                 retval = 0;
  143.                 break;
  144.             case FB_CURSOR_GOTO:
  145.                 newrow = IPC_GET_ARG1(call);
  146.                 newcol = IPC_GET_ARG2(call);
  147.                 curs_goto(newrow, newcol);
  148.                 lastrow = newrow;
  149.                 lastcol = newcol;
  150.                 retval = 0;
  151.                 break;
  152.             case FB_GET_CSIZE:
  153.                 ipc_answer_fast(callid, 0, HEIGHT, WIDTH);
  154.                 continue;
  155.             case FB_CLEAR:
  156.                 clrscr();
  157.                 retval = 0;
  158.                 break;
  159.             case FB_SET_STYLE:
  160.                 fgcolor = IPC_GET_ARG1(call);
  161.                 bgcolor = IPC_GET_ARG2(call);
  162.                 if (fgcolor < bgcolor)
  163.                     set_style(0);
  164.                 else
  165.                     set_style(7);
  166.                 retval = 0;
  167.                 break;
  168.             case FB_SCROLL:
  169.                 i = IPC_GET_ARG1(call);
  170.                 if ((i > HEIGHT) || (i < -HEIGHT)) {
  171.                     retval = EINVAL;
  172.                     break;
  173.                 }
  174.                 scroll(i);
  175.                 curs_goto(lastrow, lastcol);
  176.                 retval = 0;
  177.                 break;
  178.             default:
  179.                 retval = ENOENT;
  180.         }
  181.        
  182.         ipc_answer_fast(callid, retval, 0, 0);
  183.     }
  184. }
  185.  
  186. /** ANSI terminal emulation initialization */
  187. void sysio_init(void)
  188. {
  189.     async_set_client_connection(sysio_client_connection);
  190.     clrscr();
  191.     curs_goto(0,0);
  192.     /* Set scrolling region to 0-25 lines */
  193.     sysputs("\033[0;25r");
  194. }
  195.  
  196. /**
  197.  * @}
  198.  */
  199.