enigma-bbs/core/connect.js

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/* jslint node: true */
'use strict';
var ansi = require('./ansi_term.js');
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var assert = require('assert');
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exports.connectEntry = connectEntry;
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function ansiQueryTermSizeIfNeeded(client, cb) {
if(client.term.termHeight > 0 || client.term.termWidth > 0) {
cb(true);
return;
}
var done = function(res) {
client.removeListener('cursor position report', cprListener);
clearTimeout(giveUpTimer);
cb(res);
};
var cprListener = function(pos) {
//
// If we've already found out, disregard
//
if(client.term.termHeight > 0 || client.term.termWidth > 0) {
done(true);
return;
}
assert(2 === pos.length);
var h = pos[0];
var w = pos[1];
//
// Netrunner for example gives us 1x1 here. Not really useful. Ignore
// values that seem obviously bad.
//
if(h < 10 || w < 10) {
client.log.warn(
{ height : h, width : w },
'Ignoring ANSI CPR screen size query response due to very small values');
done(false);
return;
}
client.term.termHeight = h;
client.term.termWidth = w;
client.log.debug(
{
termWidth : client.term.termWidth,
termHeight : client.term.termHeight,
source : 'ANSI CPR'
},
'Window size updated'
);
done(true);
};
client.once('cursor position report', cprListener);
// give up after 2s
var giveUpTimer = setTimeout(function onTimeout() {
done(false);
}, 2000);
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// This causes
client.term.rawWrite(ansi.queryScreenSize());
}
function prepareTerminal(term) {
term.rawWrite(ansi.normal());
term.rawWrite(ansi.disableVT100LineWrapping());
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// :TODO: set xterm stuff -- see x84/others
}
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function displayBanner(term) {
term.pipeWrite(
'|33Conected to |32EN|33|01i|00|32|22GMA|32|01½|00 |33BBS version|31|01 |VN\n' +
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'|00|33Copyright (c) 2014-2015 Bryan Ashby |33|01- |31|01http://l33t.codes/\n' +
'|00|33Updates & source |01- |31|01https://github.com/NuSkooler/enigma-bbs/\n' +
'|00');
}
function connectEntry(client, nextMenu) {
var term = client.term;
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// :TODO: Enthral for example queries cursor position & checks if it worked. This might be good
// :TODO: How to detect e.g. if show/hide cursor can work? Probably can if CPR is avail
//
// Some terminal clients can be detected using a nonstandard ANSI DSR
//
term.rawWrite(ansi.queryDeviceAttributes(0));
// :TODO: PuTTY will apparently respond with "PuTTY" if a CTRL-E is sent to it. Add in detection.
//
// If we don't yet know the client term width/height,
// try with a nonstandard ANSI DSR type request.
//
ansiQueryTermSizeIfNeeded(client, function ansiCprResult(result) {
if(!result) {
//
// We still don't have something good for term height/width.
// Default to DOS size 80x25.
//
// :TODO: Netrunner is currenting hitting this and it feels wrong. Why is NAWS/ENV/CPR all failing???
client.log.warn('Failed to negotiate term size; Defaulting to 80x25!');
term.termHeight = 25;
term.termWidth = 80;
}
prepareTerminal(term);
//
// Always show a ENiGMA½ banner
//
displayBanner(term);
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setTimeout(function onTimeout() {
client.menuStack.goto(nextMenu);
}, 500);
});
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}