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added CSI (\x9b) as additionally allowable escape #2521

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added CSI (\x9b) as additionally allowable escape #2521

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11 changes: 6 additions & 5 deletions lib/readline.js
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Original file line number Diff line number Diff line change
Expand Up @@ -973,8 +973,9 @@ exports.emitKeypressEvents = emitKeypressEvents;
*/

// Regexes used for ansi escape code splitting
const metaKeyCodeReAnywhere = /(?:\x1b)([a-zA-Z0-9])/;
const functionKeyCodeReAnywhere = new RegExp('(?:\x1b+)(O|N|\\[|\\[\\[)(?:' + [
const metaKeyCodeReAnywhere = /(?:(?:\x1b|\x9b))([a-zA-Z0-9])/;
const functionKeyCodeReAnywhere = new RegExp('(?:(?:\x1b|\x9b)+)' +
'(O|N|\\[|\\[\\[)(?:' + [
'(\\d+)(?:;(\\d+))?([~^$])',
'(?:M([@ #!a`])(.)(.))', // mouse
'(?:1;)?(\\d+)?([a-zA-Z])'
Expand All @@ -994,11 +995,11 @@ function* emitKeys(stream) {
shift: false
};

if (ch === '\x1b') {
if (ch === '\x1b' || ch === '\x9b') {
escaped = true;
s += (ch = yield);

if (ch === '\x1b') {
if (ch === '\x1b' || ch === '\x9b') {
s += (ch = yield);
}
}
Expand Down Expand Up @@ -1219,7 +1220,7 @@ function* emitKeys(stream) {
key.name = 'backspace';
key.meta = escaped;

} else if (ch === '\x1b') {
} else if (ch === '\x1b' || ch === '\x9b') {
// escape key
key.name = 'escape';
key.meta = escaped;
Expand Down