1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/**
* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* eslint-disable no-underscore-dangle */
'use strict';
// MODULES //
var repeat = require( '@stdlib/string/repeat' );
var leadingWhitespaceRegExp = require( './regexp_leading_whitespace.js' );
// MAIN //
/**
* Displays a command prompt.
*
* @private
* @param {REPL} repl - REPL instance
* @param {boolean} [preserveCursor=false] - boolean indicating whether to preserve the cursor position
* @returns {void}
*/
function displayPrompt( repl, preserveCursor ) {
var len;
var re;
var ws;
len = repl._cmd.length;
if ( len === 0 ) {
if ( repl._padding && repl._count >= 0 ) {
repl._ostream.write( repeat( '\n', repl._padding ) );
}
repl._rli.setPrompt( repl._prompt() );
repl._rli.prompt( preserveCursor );
return;
}
repl._rli.setPrompt( '' );
repl._rli.prompt( preserveCursor );
// Prepend the leading whitespace of the previous line:
re = leadingWhitespaceRegExp();
ws = repl._cmd[ len-1 ].match( re );
if ( ws ) {
repl._rli.write( ws[ 0 ] );
}
}
// EXPORTS //
module.exports = displayPrompt;
|
