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First part of removing cursor position reports

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This commit is contained in:
Nathan Byrd 2022-03-23 18:43:49 -05:00
parent 265688a342
commit 5cb239157c
6 changed files with 45 additions and 82 deletions
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59
core/connect.js
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@ -4,6 +4,7 @@
// ENiGMA½
const ansi = require('./ansi_term.js');
const Events = require('./events.js');
const Config = require('./config.js').get;
const { Errors } = require('./enig_error.js');
// deps
@ -11,51 +12,6 @@ const async = require('async');
exports.connectEntry = connectEntry;
function ansiDiscoverHomePosition(client, cb) {
//
// We want to find the home position. ANSI-BBS and most terminals
// utilize 1,1 as home. However, some terminals such as ConnectBot
// think of home as 0,0. If this is the case, we need to offset
// our positioning to accommodate for such.
//
const done = (err) => {
client.removeListener('cursor position report', cprListener);
clearTimeout(giveUpTimer);
return cb(err);
};
const cprListener = function(pos) {
const h = pos[0];
const w = pos[1];
//
// We expect either 0,0, or 1,1. Anything else will be filed as bad data
//
if(h > 1 || w > 1) {
client.log.warn( { height : h, width : w }, 'Ignoring ANSI home position CPR due to unexpected values');
return done(Errors.UnexpectedState('Home position CPR expected to be 0,0, or 1,1'));
}
if(0 === h & 0 === w) {
//
// Store a CPR offset in the client. All CPR's from this point on will offset by this amount
//
client.log.info('Setting CPR offset to 1');
client.cprOffset = 1;
}
return done(null);
};
client.once('cursor position report', cprListener);
const giveUpTimer = setTimeout( () => {
return done(Errors.General('Giving up on home position CPR'));
}, 3000); // 3s
client.term.write(`${ansi.goHome()}${ansi.queryPos()}`); // go home, query pos
}
function ansiAttemptDetectUTF8(client, cb) {
//
// Trick to attempt and detect UTF-8. While there is a lot more than
@ -68,8 +24,9 @@ function ansiAttemptDetectUTF8(client, cb) {
//
// We currently only do this if the term hasn't already been ID'd as a
// "*nix" terminal -- that is, xterm, etc.
//
if(!client.term.isNixTerm()) {
// Also skip this check if checkUtf8Encoding is disabled in the config
if(!client.term.isNixTerm() || !Config().term.checkUtf8Encoding) {
return cb(null);
}
@ -119,6 +76,8 @@ function ansiAttemptDetectUTF8(client, cb) {
return giveUp();
}, 2000);
client.once('cursor position report', cprListener);
client.term.rawWrite(ansi.goHome() + ansi.queryPos());
}
@ -214,12 +173,6 @@ function connectEntry(client, nextMenu) {
term.rawWrite(ansi.queryDeviceAttributes(0));
return callback(null);
},
function discoverHomePosition(callback) {
ansiDiscoverHomePosition(client, () => {
// :TODO: If CPR for home fully fails, we should bail out on the connection with an error, e.g. ANSI support required
return callback(null); // we try to continue anyway
});
},
function queryTermSizeByNonStandardAnsi(callback) {
ansiQueryTermSizeIfNeeded(client, err => {
if(err) {