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keksAccountGUI/node_modulesOLD/inquirer/lib/prompts/list.js
2019-08-11 20:48:02 +02:00

184 lines
4.2 KiB
JavaScript

/**
* `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$/, '');
}