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431 lines
12 KiB
Plaintext
431 lines
12 KiB
Plaintext
//
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// GNOConsole.mm
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// 2Term
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//
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// Created by Kelvin Sherlock on 7/9/2010.
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// Copyright 2010 __MyCompanyName__. All rights reserved.
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//
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#include <sys/ttydefaults.h>
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#import "GNOConsole.h"
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#include "OutputChannel.h"
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#include "Screen.h"
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/*
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* The GNO Console Driver.
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* 0x00 n/a
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* 0x01 ^A - enable overstrike mode (IODP_gInsertFlag = 0)
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* 0x02 ^B - enable insert mode (IODP_gInsertFlag = 1)
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* 0x03 ^C - setport (IODP_GotoFlag = 3)
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* 0x04 n/a
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* 0x05 ^E - turn on cursor
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* 0x06 ^F - turn off cursor
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* 0x07 ^G - beep
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* 0x08 ^H - left arrow
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* 0x09 ^I - tab
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* 0x0a ^J - Line Feed (checks IODP_Scroll)
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* 0x0b ^K - clear EOP ???? up arrow???
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* 0x0c ^L - form feed - clear screen
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* 0x0d ^M - carraige return cursor = left margin
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* 0x0e ^N - inverse off - invert flag &= 0x7fff
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* 0x0f ^O - inverse on - invert flag |= 0x8000
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* 0x10 n/a
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* 0x11 ^Q - insert line
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* 0x12 ^R - Delete Line
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* 0x13 n/a
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* 0x14 n/a
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* 0x15 ^U - right arrow
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* 0x16 ^V - scroll down 1 line
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* 0x17 ^W - scroll up 1 line
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* 0x18 ^X - mouse text off.
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* 0x19 ^Y - cursor home.
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* 0x1a ^Z - clear line
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* 0x1b ^[ - mouse text on (inv flag | 0x4000)
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* 0x1c ^\ - increment IODP_CH (kill?)
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* 0x1d ^] -clear EOL
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* 0x1e ^^ - goto xy (IODP_GotoFlag = 1)
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* 0x1f ^_ - up arrow
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*
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* mouse text only applies if mouse text and inverse are on.
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* set port - 0x03 '[' left-margin right-margin top-margin bottom-margin [any printable character]
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*/
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/*
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The new console driver supports all the features of the old 80-column Pascal firmware,
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and adds a few extensions, with one exception - the codes that switched between 40 and
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80 columns modes are not supported. It is not compatible with the GS/OS '.console'
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driver. The control codes supported are as follows:
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Hex ASCII Action
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01 CTRL-A set cursor to flashing block
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02 CTRL-B set cursor to flashing underscore
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03 CTRL-C Begin "Set Text Window" sequence
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05 CTRL-E Cursor on
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06 CTRL-F Cursor off
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07 CTRL-G Perform FlexBeep
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08 CTRL-H Move left one character
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09 CTRL-I Tab
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0A CTRL-J Move down a line
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0B CTRL-K Clear to EOP (end of screen)
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0C CTRL-L Clear screen, home cursor
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0D CTRL-M Move cursor to left edge of line
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0E CTRL-N Normal text
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0F CTRL-O Inverse text
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11 CTRL-Q Insert a blank line at the current cursor position
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12 CTRL-R Delete the line at the current cursor position.
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15 CTRL-U Move cursor right one character
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16 CTRL-V Scroll display down one line
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17 CTRL-W Scroll display up one line
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18 CTRL-X Normal text, mousetext off
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19 CTRL-Y Home cursor
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1A CTRL-Z Clear entire line
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1B CTRL-[ MouseText on
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1C CTRL-\ Move cursor one character to the right
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1D CTRL-] Clear to end of line
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1E CTRL-^ Goto XY
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1F CTRL-_ Move up one line
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(Note: the Apple IIgs Firmware Reference incorrectly has codes 05 and 06 reversed. The
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codes listed here are correct for both GNO/ME and the Apple IIgs 80-column firmware)
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The Set Text Window sequence (begun by a $03 code) works as follows:
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CTRL-C '[' LEFT RIGHT TOP BOTTOM
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CTRL-C is of course hex $03, and '[' is the open bracket character ($5B). TOP, BOTTOM,
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LEFT, and RIGHT are single-byte ASCII values that represent the margin settings. Values
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for TOP and BOTTOM range from 0 to 23; LEFT and RIGHT range from 0 to 79. TOP must be
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numerically less than BOTTOM; LEFT must be less than RIGHT. Any impossible settings are
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ignored, and defaults are used instead. The extra '[' in the sequence helps prevent the
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screen from becoming confused in the event that random data is printed to the screen.
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After a successful Set Text Window sequence, only the portion of the screen inside the
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'window' will be accessible, and only the window will scroll; any text outside the
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window is not affected.
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*/
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@implementation GNOConsole
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enum {
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StateText,
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StateDCAX,
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StateDCAY,
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StateRepeatChar,
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StateRepeatCount,
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};
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+(void)load
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{
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[EmulatorManager registerClass: self];
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}
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+(NSString *)name
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{
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return @"GNO Console";
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}
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-(NSString *)name
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{
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return @"GNO Console";
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}
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-(const char *)termName
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{
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return "gno-console";
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}
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-(void)reset
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{
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_state = StateText;
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}
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-(BOOL)resizable
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{
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return NO;
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}
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-(struct winsize)defaultSize
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{
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struct winsize ws = { 24, 80, 0, 0 };
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return ws;
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}
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-(void)processCharacter:(uint8_t)c screen:(Screen *)screen output:(OutputChannel *)output
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{
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if (_state == StateText)
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{
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switch (c)
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{
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case CTRL('N'):
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//Set: inverse off, mousetext off.
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screen->setFlag(Screen::FlagNormal);
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break;
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case CTRL('O'):
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//Set: inverse on, mousetext off.
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screen->setFlag(Screen::FlagInverse);
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break;
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case CTRL('P'):
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//Set inverse off, mousetext on.
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screen->setFlag(Screen::FlagMouseText);
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break;
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case CTRL('H'):
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//Move cursor left one character.
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screen->decrementX();
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break;
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case CTRL('U'):
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//Move cursor right one character.
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screen->incrementX();
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break;
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case CTRL('K'):
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//Move cursor up one line.
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screen->decrementY();
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break;
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case CTRL('J'):
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//Move cursor down one line.
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//screen->incrementY();
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screen->lineFeed();
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break;
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case CTRL('I'):
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//Move cursor to next tab stop (every 8 chars).
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screen->tabTo((screen->x() + 8) & ~0x07);
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break;
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case CTRL('A'):
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//Move cursor to beginning of line.
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screen->setX(0);
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break;
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case CTRL('B'):
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//Move cursor to end of line.
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screen->setX(screen->width() - 1);
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break;
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case CTRL('X'):
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//Move cursor to upper-left corner.
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screen->setCursor(0, 0);
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break;
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case CTRL('^'):
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// CONTROL-^, X + 32, Y + 32
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//Position cursor to the X, Y coordinates.
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_state = StateDCAX;
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break;
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case CTRL('M'):
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//screen->lineFeed();
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screen->setX(0);
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break;
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case CTRL('D'):
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//Delete current character (under cursor).
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// TODO -- does this shift the rest of the row?
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screen->deletec();
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break;
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case CTRL('F'):
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//Insert space at cursor.
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screen->insertc(' ');
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break;
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case CTRL('Z'):
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//Delete current line.
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screen->removeLine(screen->y());
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break;
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case CTRL('V'):
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//Insert blank like.
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// TODO -- verify if the line is before or after the current line,
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// TODO -- verify if x/y change
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// TODO -- verify scrolling behavior.
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screen->addLine(screen->y());
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break;
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case CTRL('Y'):
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//Clear to end of line.
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screen->eraseLine();
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break;
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case CTRL('W'):
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//Clear to end of screen.
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screen->eraseScreen();
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break;
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case CTRL('L'):
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//Clear the screen (and home cursor)
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screen->setCursor(0, 0);
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screen->eraseScreen();
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break;
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case CTRL('E'):
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//Inquire if using ProTERM Special Emulation
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/*
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* When you send out [CONTROL-E] to a caller using ProTERM
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* Special, the caller’s ProTERM will send back [CONTROL-“]”]
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* (ASCII code 29). This allows a BBS to transparently
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* detect the use of PSE.
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*/
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output->write(29);
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break;
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case CTRL('R'):
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//CONTROL-R, character, count
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//Display character, count times.
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/*
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* This allows a three character code to be used to display
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* multiple characters. For example, to display a window frame,
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* it is necessary to show the top and bottom borders which are
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* long lines of the same character (dashes, underlines, etc.).
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* To draw a 64-character line consisting of equal signs, send
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* [CONTROL-R = @] where “@” is the ASCII code for 64.
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*/
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_state = StateRepeatChar;
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break;
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case CTRL('G'):
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//Sound the Bell.
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NSBeep();
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break;
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case CTRL('T'):
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//Sound single/dual-tone for duration.
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/*
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* The tone command has two forms. The first invokes the single-tone
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* generator, which produces relatively pure tones. The second
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* invokes the dual-tone generator, which produces some rather
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* interesting sounds. The three parameters, tone1, tone2, and
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* duration, can all take values from 1 through 127. There is
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* currently no known translation between pitch/duration values
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* and actual frequencies/times.
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*/
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//NB - parsed but ignored, for now.
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_state = StateTone1;
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break;
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default:
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if (c >= 0x20 && c < 0x7f)
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{
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screen->putc(c);
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}
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break;
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}
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return;
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}
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switch (_state)
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{
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case StateDCAX:
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_dca.x = c - 32;
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_state = StateDCAY;
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break;
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case StateDCAY:
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_dca.y = c - 32;
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screen->setCursor(_dca);
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_state = StateText;
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break;
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case StateRepeatChar:
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_repeatChar = c;
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_state = StateRepeatCount;
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break;
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case StateRepeatCount:
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for (unsigned i = 0; i < c; ++i)
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{
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screen->putc(_repeatChar);
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}
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_state = StateText;
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break;
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case StateTone1:
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_state = StateTone2;
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break;
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case StateTone2:
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// CONTROL-A indicates same as tone1.
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_state = StateToneDuration;
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break;
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case StateToneDuration:
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_state = StateText;
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break;
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}
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}
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-(void)keyDown:(NSEvent *)event screen:(Screen *)screen output:(OutputChannel *)output
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{
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unsigned flags = [event modifierFlags];
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NSString *chars = [event charactersIgnoringModifiers];
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unsigned length = [chars length];
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for (unsigned i = 0; i < length; ++i)
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{
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unichar uc = [chars characterAtIndex: i];
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switch (uc)
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{
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case NSEnterCharacter:
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output->write(CTRL('M'));
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break;
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case NSDeleteCharacter:
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output->write(0x7f);
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break;
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// backspace and left arrow use the same code, alas.
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case NSBackspaceCharacter:
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output->write(CTRL('H'));
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break;
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case NSLeftArrowFunctionKey:
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output->write(CTRL('H'));
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break;
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case NSRightArrowFunctionKey:
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output->write(CTRL('U'));
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break;
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case NSUpArrowFunctionKey:
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output->write(CTRL('K'));
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break;
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case NSDownArrowFunctionKey:
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output->write(CTRL('J'));
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break;
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default:
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if (uc <= 0x7f)
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{
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char c = uc;
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if (flags & NSControlKeyMask)
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c = CTRL(c);
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output->write(c);
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}
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break;
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}
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}
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}
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@end
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