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//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const {
DateNow,
FunctionPrototypeBind,
FunctionPrototypeCall,
ObjectDefineProperties,
ObjectSetPrototypeOf,
Promise,
PromiseReject,
StringPrototypeSlice,
} = primordials;
const {
clearLine,
clearScreenDown,
cursorTo,
moveCursor,
} = require('internal/readline/callbacks');
const emitKeypressEvents = require('internal/readline/emitKeypressEvents');
const promises = require('readline/promises');
const {
AbortError,
} = require('internal/errors');
const {
inspect,
} = require('internal/util/inspect');
const { promisify } = require('internal/util');
const { validateAbortSignal } = require('internal/validators');
/**
* @typedef {import('./stream.js').Readable} Readable
* @typedef {import('./stream.js').Writable} Writable
*/
const {
Interface: _Interface,
InterfaceConstructor,
kAddHistory,
kDecoder,
kDeleteLeft,
kDeleteLineLeft,
kDeleteLineRight,
kDeleteRight,
kDeleteWordLeft,
kDeleteWordRight,
kGetDisplayPos,
kHistoryNext,
kHistoryPrev,
kInsertString,
kLine,
kLine_buffer,
kMoveCursor,
kNormalWrite,
kOldPrompt,
kOnLine,
kPreviousKey,
kPrompt,
kQuestionCallback,
kQuestionCancel,
kRefreshLine,
kSawKeyPress,
kSawReturnAt,
kSetRawMode,
kTabComplete,
kTabCompleter,
kTtyWrite,
kWordLeft,
kWordRight,
kWriteToOutput,
} = require('internal/readline/interface');
function Interface(input, output, completer, terminal) {
if (!(this instanceof Interface)) {
return new Interface(input, output, completer, terminal);
}
if (input?.input &&
typeof input.completer === 'function' && input.completer.length !== 2) {
const { completer } = input;
input.completer = (v, cb) => cb(null, completer(v));
} else if (typeof completer === 'function' && completer.length !== 2) {
const realCompleter = completer;
completer = (v, cb) => cb(null, realCompleter(v));
}
FunctionPrototypeCall(InterfaceConstructor, this,
input, output, completer, terminal);
if (process.env.TERM === 'dumb') {
this._ttyWrite = FunctionPrototypeBind(_ttyWriteDumb, this);
}
}
ObjectSetPrototypeOf(Interface.prototype, _Interface.prototype);
ObjectSetPrototypeOf(Interface, _Interface);
const superQuestion = _Interface.prototype.question;
/**
* Displays `query` by writing it to the `output`.
* @param {string} query
* @param {{ signal?: AbortSignal; }} [options]
* @param {Function} cb
* @returns {void}
*/
Interface.prototype.question = function(query, options, cb) {
cb = typeof options === 'function' ? options : cb;
options = typeof options === 'object' && options !== null ? options : {};
if (options.signal) {
validateAbortSignal(options.signal, 'options.signal');
if (options.signal.aborted) {
return;
}
const onAbort = () => {
this[kQuestionCancel]();
};
options.signal.addEventListener('abort', onAbort, { once: true });
const cleanup = () => {
options.signal.removeEventListener(onAbort);
};
cb = typeof cb === 'function' ? (answer) => {
cleanup();
return cb(answer);
} : cleanup;
}
if (typeof cb === 'function') {
FunctionPrototypeCall(superQuestion, this, query, cb);
}
};
Interface.prototype.question[promisify.custom] = function(query, options) {
options = typeof options === 'object' && options !== null ? options : {};
if (options.signal && options.signal.aborted) {
return PromiseReject(
new AbortError(undefined, { cause: options.signal.reason }));
}
return new Promise((resolve, reject) => {
let cb = resolve;
if (options.signal) {
const onAbort = () => {
reject(new AbortError(undefined, { cause: options.signal.reason }));
};
options.signal.addEventListener('abort', onAbort, { once: true });
cb = (answer) => {
options.signal.removeEventListener('abort', onAbort);
resolve(answer);
};
}
this.question(query, options, cb);
});
};
/**
* Creates a new `readline.Interface` instance.
* @param {Readable | {
* input: Readable;
* output: Writable;
* completer?: Function;
* terminal?: boolean;
* history?: string[];
* historySize?: number;
* removeHistoryDuplicates?: boolean;
* prompt?: string;
* crlfDelay?: number;
* escapeCodeTimeout?: number;
* tabSize?: number;
* signal?: AbortSignal;
* }} input
* @param {Writable} [output]
* @param {Function} [completer]
* @param {boolean} [terminal]
* @returns {Interface}
*/
function createInterface(input, output, completer, terminal) {
return new Interface(input, output, completer, terminal);
}
ObjectDefineProperties(Interface.prototype, {
// Redirect internal prototype methods to the underscore notation for backward
// compatibility.
[kSetRawMode]: {
get() {
return this._setRawMode;
}
},
[kOnLine]: {
get() {
return this._onLine;
}
},
[kWriteToOutput]: {
get() {
return this._writeToOutput;
}
},
[kAddHistory]: {
get() {
return this._addHistory;
}
},
[kRefreshLine]: {
get() {
return this._refreshLine;
}
},
[kNormalWrite]: {
get() {
return this._normalWrite;
}
},
[kInsertString]: {
get() {
return this._insertString;
}
},
[kTabComplete]: {
get() {
return this._tabComplete;
}
},
[kWordLeft]: {
get() {
return this._wordLeft;
}
},
[kWordRight]: {
get() {
return this._wordRight;
}
},
[kDeleteLeft]: {
get() {
return this._deleteLeft;
}
},
[kDeleteRight]: {
get() {
return this._deleteRight;
}
},
[kDeleteWordLeft]: {
get() {
return this._deleteWordLeft;
}
},
[kDeleteWordRight]: {
get() {
return this._deleteWordRight;
}
},
[kDeleteLineLeft]: {
get() {
return this._deleteLineLeft;
}
},
[kDeleteLineRight]: {
get() {
return this._deleteLineRight;
}
},
[kLine]: {
get() {
return this._line;
}
},
[kHistoryNext]: {
get() {
return this._historyNext;
}
},
[kHistoryPrev]: {
get() {
return this._historyPrev;
}
},
[kGetDisplayPos]: {
get() {
return this._getDisplayPos;
}
},
[kMoveCursor]: {
get() {
return this._moveCursor;
}
},
[kTtyWrite]: {
get() {
return this._ttyWrite;
}
},
// Defining proxies for the internal instance properties for backward
// compatibility.
_decoder: {
get() {
return this[kDecoder];
},
set(value) {
this[kDecoder] = value;
},
},
_line_buffer: {
get() {
return this[kLine_buffer];
},
set(value) {
this[kLine_buffer] = value;
},
},
_oldPrompt: {
get() {
return this[kOldPrompt];
},
set(value) {
this[kOldPrompt] = value;
},
},
_previousKey: {
get() {
return this[kPreviousKey];
},
set(value) {
this[kPreviousKey] = value;
},
},
_prompt: {
get() {
return this[kPrompt];
},
set(value) {
this[kPrompt] = value;
},
},
_questionCallback: {
get() {
return this[kQuestionCallback];
},
set(value) {
this[kQuestionCallback] = value;
},
},
_sawKeyPress: {
get() {
return this[kSawKeyPress];
},
set(value) {
this[kSawKeyPress] = value;
},
},
_sawReturnAt: {
get() {
return this[kSawReturnAt];
},
set(value) {
this[kSawReturnAt] = value;
},
},
});
// Make internal methods public for backward compatibility.
Interface.prototype._setRawMode = _Interface.prototype[kSetRawMode];
Interface.prototype._onLine = _Interface.prototype[kOnLine];
Interface.prototype._writeToOutput = _Interface.prototype[kWriteToOutput];
Interface.prototype._addHistory = _Interface.prototype[kAddHistory];
Interface.prototype._refreshLine = _Interface.prototype[kRefreshLine];
Interface.prototype._normalWrite = _Interface.prototype[kNormalWrite];
Interface.prototype._insertString = _Interface.prototype[kInsertString];
Interface.prototype._tabComplete = function(lastKeypressWasTab) {
// Overriding parent method because `this.completer` in the legacy
// implementation takes a callback instead of being an async function.
this.pause();
const string = StringPrototypeSlice(this.line, 0, this.cursor);
this.completer(string, (err, value) => {
this.resume();
if (err) {
this._writeToOutput(`Tab completion error: ${inspect(err)}`);
return;
}
this[kTabCompleter](lastKeypressWasTab, value);
});
};
Interface.prototype._wordLeft = _Interface.prototype[kWordLeft];
Interface.prototype._wordRight = _Interface.prototype[kWordRight];
Interface.prototype._deleteLeft = _Interface.prototype[kDeleteLeft];
Interface.prototype._deleteRight = _Interface.prototype[kDeleteRight];
Interface.prototype._deleteWordLeft = _Interface.prototype[kDeleteWordLeft];
Interface.prototype._deleteWordRight = _Interface.prototype[kDeleteWordRight];
Interface.prototype._deleteLineLeft = _Interface.prototype[kDeleteLineLeft];
Interface.prototype._deleteLineRight = _Interface.prototype[kDeleteLineRight];
Interface.prototype._line = _Interface.prototype[kLine];
Interface.prototype._historyNext = _Interface.prototype[kHistoryNext];
Interface.prototype._historyPrev = _Interface.prototype[kHistoryPrev];
Interface.prototype._getDisplayPos = _Interface.prototype[kGetDisplayPos];
Interface.prototype._getCursorPos = _Interface.prototype.getCursorPos;
Interface.prototype._moveCursor = _Interface.prototype[kMoveCursor];
Interface.prototype._ttyWrite = _Interface.prototype[kTtyWrite];
function _ttyWriteDumb(s, key) {
key = key || {};
if (key.name === 'escape') return;
if (this[kSawReturnAt] && key.name !== 'enter')
this[kSawReturnAt] = 0;
if (key.ctrl) {
if (key.name === 'c') {
if (this.listenerCount('SIGINT') > 0) {
this.emit('SIGINT');
} else {
// This readline instance is finished
this.close();
}
return;
} else if (key.name === 'd') {
this.close();
return;
}
}
switch (key.name) {
case 'return': // Carriage return, i.e. \r
this[kSawReturnAt] = DateNow();
this._line();
break;
case 'enter':
// When key interval > crlfDelay
if (this[kSawReturnAt] === 0 ||
DateNow() - this[kSawReturnAt] > this.crlfDelay) {
this._line();
}
this[kSawReturnAt] = 0;
break;
default:
if (typeof s === 'string' && s) {
this.line += s;
this.cursor += s.length;
this._writeToOutput(s);
}
}
}
module.exports = {
Interface,
clearLine,
clearScreenDown,
createInterface,
cursorTo,
emitKeypressEvents,
moveCursor,
promises,
};
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