135 lines
3.4 KiB
JavaScript
135 lines
3.4 KiB
JavaScript
/* jslint node: true */
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'use strict';
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// ENiGMA½
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const ansi = require('./ansi_term.js');
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exports.connectEntry = connectEntry;
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function ansiQueryTermSizeIfNeeded(client, cb) {
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if(client.term.termHeight > 0 || client.term.termWidth > 0) {
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return cb(null);
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}
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const done = function(err) {
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client.removeListener('cursor position report', cprListener);
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clearTimeout(giveUpTimer);
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return cb(err);
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};
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const cprListener = function(pos) {
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//
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// If we've already found out, disregard
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//
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if(client.term.termHeight > 0 || client.term.termWidth > 0) {
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return done(null);
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}
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if(2 !== pos.length) {
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client.log.warn( { cprPosition : pos }, 'Unexpected CPR format');
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}
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const h = pos[0] || 0;
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const w = pos[1] || 0;
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//
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// Netrunner for example gives us 1x1 here. Not really useful. Ignore
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// values that seem obviously bad.
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//
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if(h < 10 || w < 10) {
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client.log.warn(
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{ height : h, width : w },
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'Ignoring ANSI CPR screen size query response due to very small values');
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return done(new Error('Term size <= 10 considered invalid'));
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}
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client.term.termHeight = h;
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client.term.termWidth = w;
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client.log.debug(
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{
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termWidth : client.term.termWidth,
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termHeight : client.term.termHeight,
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source : 'ANSI CPR'
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},
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'Window size updated'
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);
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return done(null);
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};
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client.once('cursor position report', cprListener);
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// give up after 2s
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const giveUpTimer = setTimeout( () => {
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return done(new Error('No term size established by CPR within timeout'));
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}, 2000);
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// Start the process: Query for CPR
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client.term.rawWrite(ansi.queryScreenSize());
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}
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function prepareTerminal(term) {
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term.rawWrite(ansi.normal());
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//term.rawWrite(ansi.disableVT100LineWrapping());
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// :TODO: set xterm stuff -- see x84/others
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}
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function displayBanner(term) {
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term.pipeWrite(
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'|06Connected to |02EN|10i|02GMA|10½ |06BBS version |12|VN\n' +
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'|06Copyright (c) 2014-2016 Bryan Ashby |14- |12http://l33t.codes/\n' +
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'|06Updates & source |14- |12https://github.com/NuSkooler/enigma-bbs/\n' +
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'|00');
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}
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function connectEntry(client, nextMenu) {
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const term = client.term;
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// :TODO: Enthral for example queries cursor position & checks if it worked. This might be good
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// :TODO: How to detect e.g. if show/hide cursor can work? Probably can if CPR is avail
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//
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// Some terminal clients can be detected using a nonstandard ANSI DSR
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//
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term.rawWrite(ansi.queryDeviceAttributes(0));
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// :TODO: PuTTY will apparently respond with "PuTTY" if a CTRL-E is sent to it. Add in detection.
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//
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// If we don't yet know the client term width/height,
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// try with a nonstandard ANSI DSR type request.
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//
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ansiQueryTermSizeIfNeeded(client, err => {
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if(err) {
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//
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// Check again; We may have got via NAWS/similar before CPR completed.
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//
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if(0 === term.termHeight || 0 === term.termWidth) {
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//
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// We still don't have something good for term height/width.
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// Default to DOS size 80x25.
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//
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// :TODO: Netrunner is currenting hitting this and it feels wrong. Why is NAWS/ENV/CPR all failing???
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client.log.warn( { reason : err.message }, 'Failed to negotiate term size; Defaulting to 80x25!');
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term.termHeight = 25;
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term.termWidth = 80;
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}
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}
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prepareTerminal(term);
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//
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// Always show an ENiGMA½ banner
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//
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displayBanner(term);
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setTimeout( () => {
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return client.menuStack.goto(nextMenu);
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}, 500);
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});
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}
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