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sortix--sortix/sortix/serialterminal.cpp
Jonas 'Sortie' Termansen 193b76f8cb Refactor scheduler API.
2013-12-17 14:30:26 +01:00

159 lines
4.5 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
serialterminal.cpp
A terminal on a serial line.
*******************************************************************************/
#include <sortix/kernel/platform.h>
#include <sortix/kernel/keyboard.h>
#include <sortix/kernel/scheduler.h>
#include <string.h>
#include "vga.h"
#include "uart.h"
#include "serialterminal.h"
namespace Sortix
{
namespace SerialTerminal
{
void Reset()
{
// Set the cursor to (0,0) and clear the screen.
const char InitMessage[] = "\e[37m\e[40m\e[2J\e[H";
UART::Write(InitMessage, strlen(InitMessage));
}
bool isEsc;
bool isEscDepress;
int sigpending;
const bool ECHO_TO_VGA = true;
bool cursordisabled;
void Init()
{
Reset();
isEsc = isEscDepress = false;
sigpending = -1;
cursordisabled = false;
}
void OnTick()
{
// TODO: Yeah, this is a bad hack.
int c;
while ( (c=UART::TryPopChar()) != -1 )
{
// TODO: Support for hooking the serial input up against the keyboard API have broken
#if 0
// TODO: This is no longer compatible with the keyboard API, so
// it has been commented out. Besides, JSSortix isn't really
// supported anyway. It'd be nice to refactor this into a
// SerialKeyboard class or something.
using namespace Maxsi::Keyboard;
if ( !isEsc && c == '\e' ) { isEsc = true; continue; }
if ( isEsc && c == '\e' ) { isEsc = false; }
if ( isEsc && c == '[' ) { continue; }
if ( isEsc && c == ']' ) { isEscDepress = true; continue; }
if ( isEsc && !isEscDepress && c == 'A' ) { Keyboard::QueueKeystroke(UP); }
if ( isEsc && !isEscDepress && c == 'B' ) { Keyboard::QueueKeystroke(DOWN); }
if ( isEsc && !isEscDepress && c == 'C' ) { Keyboard::QueueKeystroke(RIGHT); }
if ( isEsc && !isEscDepress && c == 'D' ) { Keyboard::QueueKeystroke(LEFT); }
if ( isEsc && isEscDepress && c == 'A' ) { Keyboard::QueueKeystroke(UP | DEPRESSED); }
if ( isEsc && isEscDepress && c == 'B' ) { Keyboard::QueueKeystroke(DOWN | DEPRESSED); }
if ( isEsc && isEscDepress && c == 'C' ) { Keyboard::QueueKeystroke(RIGHT | DEPRESSED); }
if ( isEsc && isEscDepress && c == 'D' ) { Keyboard::QueueKeystroke(LEFT | DEPRESSED); }
if ( isEsc ) { isEsc = false; isEscDepress = false; continue; }
if ( c == '\e' ) { c = ESC; }
if ( c == ('\e' | (1<<7)) ) { c = ESC | DEPRESSED; }
if ( c == 145 ) // Control Depressed
{
if ( sigpending < 0 ) { continue; }
if ( sigpending == 'C' - 'A' + 1 )
{
Scheduler::SigIntHack();
continue;
}
Keyboard::QueueKeystroke(CTRL);
Keyboard::QueueKeystroke('A' + sigpending - 1);
Keyboard::QueueKeystroke(CTRL | DEPRESSED);
sigpending = -1;
continue;
}
if ( c < 32 ) { sigpending = c; } else { sigpending = -1; }
switch ( c )
{
default:
// Ignore most unprintable characters.
if ( c < 32 ) { continue; }
case '\b':
case '\t':
case '\r':
case '\n':
case '\e':
case '\f':
break;
}
if ( c == 127 ) { c = '\b'; }
if ( c & (1<<7) )
{
c &= ~(1<<7); c |= DEPRESSED;
}
Keyboard::QueueKeystroke(c);
#endif
}
}
void OnVGAModified()
{
if ( !cursordisabled )
{
const char* msg = "\e[l";
UART::Write(msg, strlen(msg));
cursordisabled = true;
}
UART::RenderVGA((const uint16_t*) 0xB8000);
}
size_t Print(void* /*user*/, const char* string, size_t stringlen)
{
// TODO: Echoing to the VGA terminal is broken
#if 0
if ( ECHO_TO_VGA ) { VGATerminal::Print(NULL, string, stringlen); }
#endif
if ( cursordisabled )
{
const char* msg = "\e[h";
UART::Write(msg, strlen(msg));
cursordisabled = false;
}
UART::Write(string, stringlen);
return stringlen;
}
}
}