blob: c29542f228c8a786f84b2ca519a5b6a97354961e (
plain)
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/**
* `list` type prompt
*/
var _ = require('lodash');
var util = require('util');
var chalk = require('chalk');
var figures = require('figures');
var cliCursor = require('cli-cursor');
var runAsync = require('run-async');
var Base = require('./base');
var observe = require('../utils/events');
var Paginator = require('../utils/paginator');
/**
* Module exports
*/
module.exports = Prompt;
/**
* Constructor
*/
function Prompt() {
Base.apply(this, arguments);
if (!this.opt.choices) {
this.throwParamError('choices');
}
this.firstRender = true;
this.selected = 0;
var def = this.opt.default;
// If def is a Number, then use as index. Otherwise, check for value.
if (_.isNumber(def) && def >= 0 && def < this.opt.choices.realLength) {
this.selected = def;
} else if (!_.isNumber(def) && def != null) {
this.selected = this.opt.choices.pluck('value').indexOf(def);
}
// Make sure no default is set (so it won't be printed)
this.opt.default = null;
this.paginator = new Paginator();
}
util.inherits(Prompt, Base);
/**
* Start the Inquiry session
* @param {Function} cb Callback when prompt is done
* @return {this}
*/
Prompt.prototype._run = function (cb) {
this.done = cb;
var self = this;
var events = observe(this.rl);
events.normalizedUpKey.takeUntil(events.line).forEach(this.onUpKey.bind(this));
events.normalizedDownKey.takeUntil(events.line).forEach(this.onDownKey.bind(this));
events.numberKey.takeUntil(events.line).forEach(this.onNumberKey.bind(this));
events.line
.take(1)
.map(this.getCurrentValue.bind(this))
.flatMap(function (value) {
return runAsync(self.opt.filter)(value).catch(function (err) {
return err;
});
})
.forEach(this.onSubmit.bind(this));
// Init the prompt
cliCursor.hide();
this.render();
return this;
};
/**
* Render the prompt to screen
* @return {Prompt} self
*/
Prompt.prototype.render = function () {
// Render question
var message = this.getQuestion();
if (this.firstRender) {
message += chalk.dim('(Use arrow keys)');
}
// Render choices or answer depending on the state
if (this.status === 'answered') {
message += chalk.cyan(this.opt.choices.getChoice(this.selected).short);
} else {
var choicesStr = listRender(this.opt.choices, this.selected);
var indexPosition = this.opt.choices.indexOf(this.opt.choices.getChoice(this.selected));
message += '\n' + this.paginator.paginate(choicesStr, indexPosition, this.opt.pageSize);
}
this.firstRender = false;
this.screen.render(message);
};
/**
* When user press `enter` key
*/
Prompt.prototype.onSubmit = function (value) {
this.status = 'answered';
// Rerender prompt
this.render();
this.screen.done();
cliCursor.show();
this.done(value);
};
Prompt.prototype.getCurrentValue = function () {
return this.opt.choices.getChoice(this.selected).value;
};
/**
* When user press a key
*/
Prompt.prototype.onUpKey = function () {
var len = this.opt.choices.realLength;
this.selected = (this.selected > 0) ? this.selected - 1 : len - 1;
this.render();
};
Prompt.prototype.onDownKey = function () {
var len = this.opt.choices.realLength;
this.selected = (this.selected < len - 1) ? this.selected + 1 : 0;
this.render();
};
Prompt.prototype.onNumberKey = function (input) {
if (input <= this.opt.choices.realLength) {
this.selected = input - 1;
}
this.render();
};
/**
* Function for rendering list choices
* @param {Number} pointer Position of the pointer
* @return {String} Rendered content
*/
function listRender(choices, pointer) {
var output = '';
var separatorOffset = 0;
choices.forEach(function (choice, i) {
if (choice.type === 'separator') {
separatorOffset++;
output += ' ' + choice + '\n';
return;
}
if (choice.disabled) {
separatorOffset++;
output += ' - ' + choice.name;
output += ' (' + (_.isString(choice.disabled) ? choice.disabled : 'Disabled') + ')';
output += '\n';
return;
}
var isSelected = (i - separatorOffset === pointer);
var line = (isSelected ? figures.pointer + ' ' : ' ') + choice.name;
if (isSelected) {
line = chalk.cyan(line);
}
output += line + ' \n';
});
return output.replace(/\n$/, '');
}
|
