TwoTerm/Emulators/GNOConsole.mm
Kelvin Sherlock 13e46a0aac gno console --commentary.
git-svn-id: svn://qnap.local/TwoTerm/trunk@3176 5590a31f-7b70-45f8-8c82-aa3a8e5f4507
2017-02-25 18:26:57 +00:00

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//
// GNOConsole.mm
// 2Term
//
// Created by Kelvin Sherlock on 7/9/2010.
// Copyright 2010 __MyCompanyName__. All rights reserved.
//
#include <sys/ttydefaults.h>
#include <numeric>
#import "GNOConsole.h"
#include "OutputChannel.h"
#include "Screen.h"
/*
* The GNO Console Driver.
* this was gleaned from the source code.
*
* 0x00 n/a
* 0x01 ^A - enable overstrike mode (IODP_gInsertFlag = 0)
* 0x02 ^B - enable insert mode (IODP_gInsertFlag = 1)
* 0x03 ^C - setport (IODP_GotoFlag = 3)
* 0x04 n/a
* 0x05 ^E - turn on cursor
* 0x06 ^F - turn off cursor
* 0x07 ^G - beep
* 0x08 ^H - left arrow
* 0x09 ^I - tab
* 0x0a ^J - Line Feed (checks IODP_Scroll)
* 0x0b ^K - clear EOP ???? up arrow???
* 0x0c ^L - form feed - clear screen
* 0x0d ^M - carriage return cursor = left margin
* 0x0e ^N - inverse off - invert flag &= 0x7fff
* 0x0f ^O - inverse on - invert flag |= 0x8000
* 0x10 n/a
* 0x11 ^Q - insert line
* 0x12 ^R - Delete Line
* 0x13 n/a
* 0x14 n/a
* 0x15 ^U - right arrow
* 0x16 ^V - scroll down 1 line
* 0x17 ^W - scroll up 1 line
* 0x18 ^X - mouse text off.
* 0x19 ^Y - cursor home.
* 0x1a ^Z - clear line
* 0x1b ^[ - mouse text on (inv flag | 0x4000)
* 0x1c ^\ - increment IODP_CH (kill?)
* 0x1d ^] -clear EOL
* 0x1e ^^ - goto xy (IODP_GotoFlag = 1)
* 0x1f ^_ - up arrow
*
* mouse text only applies if mouse text and inverse are on.
* set port - 0x03 '[' left-margin right-margin top-margin bottom-margin [any printable character]
*/
/*
this was gleaned from the kernel reference manual.
The new console driver supports all the features of the old 80-column Pascal firmware,
and adds a few extensions, with one exception - the codes that switched between 40 and
80 columns modes are not supported. It is not compatible with the GS/OS '.console'
driver. The control codes supported are as follows:
Hex ASCII Action
01 CTRL-A set cursor to flashing block
02 CTRL-B set cursor to flashing underscore
03 CTRL-C Begin "Set Text Window" sequence
05 CTRL-E Cursor on
06 CTRL-F Cursor off
07 CTRL-G Perform FlexBeep
08 CTRL-H Move left one character
09 CTRL-I Tab
0A CTRL-J Move down a line
0B CTRL-K Clear to EOP (end of screen)
0C CTRL-L Clear screen, home cursor
0D CTRL-M Move cursor to left edge of line
0E CTRL-N Normal text
0F CTRL-O Inverse text
11 CTRL-Q Insert a blank line at the current cursor position
12 CTRL-R Delete the line at the current cursor position.
15 CTRL-U Move cursor right one character
16 CTRL-V Scroll display down one line
17 CTRL-W Scroll display up one line
18 CTRL-X Normal text, mousetext off
19 CTRL-Y Home cursor
1A CTRL-Z Clear entire line
1B CTRL-[ MouseText on
1C CTRL-\ Move cursor one character to the right
1D CTRL-] Clear to end of line
1E CTRL-^ Goto XY
1F CTRL-_ Move up one line
(Note: the Apple IIgs Firmware Reference incorrectly has codes 05 and 06 reversed. The
codes listed here are correct for both GNO/ME and the Apple IIgs 80-column firmware)
The Set Text Window sequence (begun by a $03 code) works as follows:
CTRL-C '[' LEFT RIGHT TOP BOTTOM
CTRL-C is of course hex $03, and '[' is the open bracket character ($5B). TOP, BOTTOM,
LEFT, and RIGHT are single-byte ASCII values that represent the margin settings. Values
for TOP and BOTTOM range from 0 to 23; LEFT and RIGHT range from 0 to 79. TOP must be
numerically less than BOTTOM; LEFT must be less than RIGHT. Any impossible settings are
ignored, and defaults are used instead. The extra '[' in the sequence helps prevent the
screen from becoming confused in the event that random data is printed to the screen.
After a successful Set Text Window sequence, only the portion of the screen inside the
'window' will be accessible, and only the window will scroll; any text outside the
window is not affected.
*/
@implementation GNOConsole
+(void)load
{
[EmulatorManager registerClass: self];
}
+(NSString *)name
{
return @"GNO Console";
}
-(NSString *)name
{
return @"GNO Console";
}
-(const char *)termName
{
return "gno-console";
}
enum {
StateText,
StateDCAX,
StateDCAY,
StateWindow1,
StateWindow2,
StateWindow3,
StateWindow4,
StateWindow5,
};
-(void)reset
{
cs = StateText;
_context.flags = 0;
_context.window = iRect(0, 0, 80, 24);
_context.cursor = iPoint(0,0);
_cursorType = Screen::CursorTypeUnderscore;
// set flags to plain text.
}
-(BOOL)resizable
{
return NO;
}
-(struct winsize)defaultSize
{
struct winsize ws = { 24, 80, 0, 0 };
return ws;
}
-(void)initTerm: (struct termios *)term
{
// Control-U is used by the up-arrow key.
term->c_cc[VKILL] = CTRL('X');
}
-(id)init
{
if ((self = [super init]))
{
[self reset];
}
return self;
}
static void forward(context &ctx, Screen *screen) {
if (ctx.cursor.x > ctx.window.maxX()-1) {
ctx.cursor.x = ctx.window.minX();
if (ctx.cursor.y >= ctx.window.maxY()-1) {
screen->scrollUp(ctx.window);
} else ctx.cursor.y++;
}
}
static void bs(context &ctx, Screen *screen) {
if (ctx.cursor.x == ctx.window.minX()) {
ctx.cursor.x = ctx.window.maxX()-1;
if (ctx.cursor.y != ctx.window.minY()) ctx.cursor.y--;
}
else ctx.cursor.x--;
}
static void lf(context &ctx, Screen *screen) {
if (ctx.cursor.y >= ctx.window.maxY()-1) {
screen->scrollUp(ctx.window);
} else ctx.cursor.y++;
}
-(void)processData: (uint8_t *)data length: (size_t)length screen:(Screen *)screen output:(OutputChannel *)output
{
cs = std::accumulate(data, data + length, cs, [&](unsigned state, uint8_t c) -> unsigned {
iPoint &cursor = _context.cursor;
iRect &window = _context.window;
c &= 0x7f;
if (c < 0x20) {
switch (c) {
case CTRL('^'): return StateDCAX;
case CTRL('C'): return StateWindow1;
//
case CTRL('A'):
screen->setCursorType(_cursorType = Screen::CursorTypeBlock);
break;
case CTRL('B'):
screen->setCursorType(_cursorType = Screen::CursorTypeUnderscore);
break;
case CTRL('E'):
screen->setCursorType(_cursorType);
break;
case CTRL('F'):
screen->setCursorType(Screen::CursorTypeNone);
break;
case CTRL('G'): NSBeep(); break;
case CTRL('H'): bs(_context, screen); break;
case CTRL('I'): cursor.x = (cursor.x + 8) & ~0x07; forward(_context, screen); break;
case CTRL('J'): lf(_context, screen); break;
case CTRL('K'): {
// CTRL('K'):
// clear to end of screen
iRect tmp;
tmp.origin = cursor;
tmp.size = iSize(window.size.width - cursor.x, 1);
screen->eraseRect(tmp);
tmp = window;
tmp.origin.y = cursor.y+1;
tmp.size.height -= cursor.y+1;
screen->eraseRect(tmp);
break;
}
case CTRL('L'): {
// CTRL('L'):
// clear screen, go home.
screen->eraseRect(window);
cursor = window.origin;
break;
}
case CTRL('M'): cursor.x = window.minX(); break;
case CTRL('N'): _context.clearFlagBit(Screen::FlagInverse); break;
case CTRL('O'): _context.setFlagBit(Screen::FlagInverse); break;
case CTRL('Q'): {
// CTRL('Q'):
// insert line.
iRect tmp(iPoint(window.minX(), cursor.y), window.bottomRight());
screen->scrollDown(tmp);
break;
}
case CTRL('R'): {
// CTRL('R'):
// delete line
iRect tmp(iPoint(window.minX(), cursor.y), window.bottomRight());
screen->scrollUp(tmp);
break;
}
case CTRL('U'): {
forward(_context, screen);
cursor.x++;
forward(_context, screen);
break;
}
case CTRL('V'): {
// CTRL('V'):
// scroll down 1 line.
screen->scrollDown(window);
break;
}
case CTRL('W'): {
// CTRL('W'):
// scroll up 1 line.
screen->scrollUp(window);
break;
}
case CTRL('X'): _context.clearFlagBit(Screen::FlagMouseText); break;
case CTRL('Y'): cursor = iPoint(0,0); break;
case CTRL('Z'): {
// CTRL('Z'):
// clear entire line
iRect tmp;
tmp.origin = iPoint(window.origin.x, cursor.y);
tmp.size = iSize(window.size.width, 1);
screen->eraseRect(tmp);
break;
}
case CTRL('['): _context.setFlagBit(Screen::FlagMouseText); break;
case CTRL('\\'): cursor.x++; break;
case CTRL(']'): {
// CTRL(']'):
// clear to end of line.
iRect tmp;
tmp.origin = cursor;
tmp.size = iSize(window.size.width - cursor.x, 1);
screen->eraseRect(tmp);
break;
}
case CTRL('_'): if (cursor.y != window.minY()) { cursor.y--; } break;
}
return state;
}
switch (state) {
case StateText:
forward(_context, screen);
screen->putc(c, _context);
cursor.x++;
return state;
case StateDCAX:
_scratch[0] = c - 32;
return state+1;
case StateDCAY:
_scratch[1] = c - 32;
if (_scratch[0] <= window.maxX()-1) cursor.x = _scratch[0];
cursor.y = std::min(_scratch[1], window.maxY() -1);
return StateText;
case StateWindow1:
if (c!= '[') return StateText;
return state+1;
case StateWindow2:
case StateWindow3:
case StateWindow4:
case StateWindow5:
_scratch[state-StateWindow2] = c - 32;
if (state != StateWindow5) return state+1;
// 1.
_scratch[1] = std::min(80-1, _scratch[1])+1;
_scratch[3] = std::min(24-1, _scratch[3])+1;
// n.b. GNO does check 1 -after- check 2, so left could be > right
// (eg 90, 100 : gets clamped to 90, 80.
// 2
if (_scratch[0] <= _scratch[1]) {
_scratch[0] = 0;
_scratch[1] = 80;
}
if (_scratch[2] <= _scratch[3]) {
_scratch[2] = 0;
_scratch[3] = 24;
}
window = iRect(
iPoint(_scratch[0], _scratch[2]),
iPoint(_scratch[1], _scratch[3])
);
// move the cursor to the top left
// gnome clamps the horizontal, doesn't adjust the vertical.
//screen->setCursor(&_textPort, iPoint(0,0));
if (cursor.x < _scratch[0]) cursor.x = _scratch[0];
if (cursor.x >= _scratch[1]) cursor.x = _scratch[1] - 1;
return StateText;
}
return StateText;
});
screen->setCursor(_context.cursor);
}
-(void)keyDown:(NSEvent *)event screen:(Screen *)screen output:(OutputChannel *)output
{
NSEventModifierFlags flags = [event modifierFlags];
NSString *chars = [event charactersIgnoringModifiers];
NSUInteger length = [chars length];
for (unsigned i = 0; i < length; ++i)
{
unichar uc = [chars characterAtIndex: i];
switch (uc)
{
case NSEnterCharacter:
output->write(CTRL('M'));
break;
/*
case NSDeleteCharacter:
output->write(0x7f);
break;
*/
case NSBackspaceCharacter:
output->write(0x7f);
break;
case NSLeftArrowFunctionKey:
output->write(CTRL('H'));
break;
case NSRightArrowFunctionKey:
output->write(CTRL('U'));
break;
case NSUpArrowFunctionKey:
output->write(CTRL('K'));
break;
case NSDownArrowFunctionKey:
output->write(CTRL('J'));
break;
default:
if (uc <= 0x7f)
{
char c = uc;
if (flags & (NSShiftKeyMask | NSAlphaShiftKeyMask))
{
c = toupper(c);
}
if (flags & NSControlKeyMask)
c = CTRL(c);
output->write(c);
}
break;
}
}
}
@end