TwoTerm/PTSE.mm

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//
// PTSE.mm
// 2Term
//
// Created by Kelvin Sherlock on 7/9/2010.
// Copyright 2010 __MyCompanyName__. All rights reserved.
//
#include <sys/ttydefaults.h>
#import "PTSE.h"
#include "OutputChannel.h"
#include "Screen.h"
@implementation PTSE
enum {
StateText,
StateDCAX,
StateDCAY,
StateRepeatChar,
StateRepeatCount,
StateTone1,
StateTone2,
StateToneDuration
};
-(const char *)termName
{
return "proterm-special";
}
+(NSString *)name
{
return @"Proterm Special Emulation";
}
-(NSString *)name
{
return @"Proterm Special Emulation";
}
-(void)reset
{
_state = StateText;
}
-(BOOL)resizable
{
return NO;
}
-(struct winsize)defaultSize
{
struct winsize ws = { 24, 80, 0, 0 };
return ws;
}
-(void)processCharacter:(uint8_t)c screen:(Screen *)screen output:(OutputChannel *)output
{
if (_state == StateText)
{
switch (c)
{
case CTRL('N'):
//Set: inverse off, mousetext off.
screen->setFlag(Screen::FlagNormal);
break;
case CTRL('O'):
//Set: inverse on, mousetext off.
screen->setFlag(Screen::FlagInverse);
break;
case CTRL('P'):
//Set inverse off, mousetext on.
screen->setFlag(Screen::FlagMouseText);
break;
case CTRL('H'):
//Move cursor left one character.
screen->decrementX();
break;
case CTRL('U'):
//Move cursor right one character.
screen->incrementX();
break;
case CTRL('K'):
//Move cursor up one line.
screen->decrementY();
break;
case CTRL('J'):
//Move cursor down one line.
screen->incrementY();
break;
case CTRL('I'):
//Move cursor to next tab stop (every 8 chars).
screen->setX((screen->x() + 8) & 0x07);
break;
case CTRL('A'):
//Move cursor to beginning of line.
screen->setX(0);
break;
case CTRL('B'):
//Move cursor to end of line.
screen->setX(screen->width() - 1);
break;
case CTRL('X'):
//Move cursor to upper-left corner.
screen->setCursor(0, 0);
break;
case CTRL('^'):
// CONTROL-^, X + 32, Y + 32
//Position cursor to the X, Y coordinates.
_state = StateDCAX;
break;
case CTRL('M'):
screen->lineFeed();
screen->setX(0);
break;
case CTRL('D'):
//Delete current character (under cursor).
break;
case CTRL('F'):
//Insert space at cursor.
break;
case CTRL('Z'):
//Delete current line.
break;
case CTRL('V'):
//Insert blank like.
break;
case CTRL('Y'):
//Clear to end of line.
screen->eraseLine();
break;
case CTRL('W'):
//Clear to end of screen.
screen->eraseScreen();
break;
case CTRL('L'):
//Clear the screen (and home cursor)
screen->setCursor(0, 0);
screen->eraseScreen();
break;
case CTRL('E'):
//Inquire if using ProTERM Special Emulation
/*
* When you send out [CONTROL-E] to a caller using ProTERM
* Special, the callers ProTERM will send back [CONTROL-“]”]
* (ASCII code 29). This allows a BBS to transparently
* detect the use of PSE.
*/
output->write(29);
break;
case CTRL('R'):
//CONTROL-R, character, count
//Display character, count times.
/*
* This allows a three character code to be used to display
* multiple characters. For example, to display a window frame,
* it is necessary to show the top and bottom borders which are
* long lines of the same character (dashes, underlines, etc.).
* To draw a 64-character line consisting of equal signs, send
* [CONTROL-R = @] where “@” is the ASCII code for 64.
*/
_state = StateRepeatChar;
break;
case CTRL('G'):
//Sound the Bell.
NSBeep();
break;
case CTRL('T'):
//Sound single/dual-tone for duration.
/*
* The tone command has two forms. The first invokes the single-tone
* generator, which produces relatively pure tones. The second
* invokes the dual-tone generator, which produces some rather
* interesting sounds. The three parameters, tone1, tone2, and
* duration, can all take values from 1 through 127. There is
* currently no known translation between pitch/duration values
* and actual frequencies/times.
*/
//NB - parsed but ignored, for now.
_state = StateTone1;
break;
}
return;
}
switch (_state)
{
case StateDCAX:
_dca.x = c - 32;
_state = StateDCAY;
break;
case StateDCAY:
_dca.y = c - 32;
screen->setCursor(_dca);
_state = StateText;
break;
case StateRepeatChar:
_repeatChar = c;
_state = StateRepeatCount;
break;
case StateRepeatCount:
for (unsigned i = 0; i < c; ++i)
{
screen->putc(_repeatChar);
}
_state = StateText;
break;
case StateTone1:
_state = StateTone2;
break;
case StateTone2:
// CONTROL-A indicates same as tone1.
_state = StateToneDuration;
break;
case StateToneDuration:
_state = StateText;
break;
}
}
-(void)keyDown:(NSEvent *)event screen:(Screen *)screen output:(OutputChannel *)output
{
unsigned flags = [event modifierFlags];
NSString *chars = [event charactersIgnoringModifiers];
unsigned length = [chars length];
for (unsigned i = 0; i < length; ++i)
{
unichar uc = [chars characterAtIndex: i];
switch (uc)
{
case NSLeftArrowFunctionKey:
case NSRightArrowFunctionKey:
case NSUpArrowFunctionKey:
case NSDownArrowFunctionKey:
default:
if (uc <= 0x7f)
{
char c = uc;
if (flags & NSControlKeyMask)
c = CTRL(c);
output->write(c);
}
break;
}
}
}
@end