install-nix-action/node_modules/prompts/lib/elements/autocomplete.js
Domen Kožar 70742d22d9
v6
2019-11-19 17:50:30 +01:00

265 lines
7.5 KiB
JavaScript

'use strict';
const color = require('kleur');
const Prompt = require('./prompt');
const { erase, cursor } = require('sisteransi');
const { style, clear, wrap } = require('../util');
const getVal = (arr, i) => arr[i] && (arr[i].value || arr[i].title || arr[i]);
const getTitle = (arr, i) => arr[i] && (arr[i].title || arr[i].value || arr[i]);
const getIndex = (arr, valOrTitle) => {
const index = arr.findIndex(el => el.value === valOrTitle || el.title === valOrTitle);
return index > -1 ? index : undefined;
};
/**
* TextPrompt Base Element
* @param {Object} opts Options
* @param {String} opts.message Message
* @param {Array} opts.choices Array of auto-complete choices objects
* @param {Function} [opts.suggest] Filter function. Defaults to sort by title
* @param {Number} [opts.limit=10] Max number of results to show
* @param {Number} [opts.cursor=0] Cursor start position
* @param {String} [opts.style='default'] Render style
* @param {String} [opts.fallback] Fallback message - initial to default value
* @param {String} [opts.initial] Index of the default value
* @param {Stream} [opts.stdin] The Readable stream to listen to
* @param {Stream} [opts.stdout] The Writable stream to write readline data to
* @param {String} [opts.noMatches] The no matches found label
*/
class AutocompletePrompt extends Prompt {
constructor(opts={}) {
super(opts);
this.msg = opts.message;
this.suggest = opts.suggest;
this.choices = opts.choices;
this.initial = typeof opts.initial === 'number'
? opts.initial
: getIndex(opts.choices, opts.initial);
this.select = this.initial || opts.cursor || 0;
this.i18n = { noMatches: opts.noMatches || 'no matches found' };
this.fallback = opts.fallback || this.initial;
this.suggestions = [[]];
this.page = 0;
this.input = '';
this.limit = opts.limit || 10;
this.cursor = 0;
this.transform = style.render(opts.style);
this.scale = this.transform.scale;
this.render = this.render.bind(this);
this.complete = this.complete.bind(this);
this.clear = clear('');
this.complete(this.render);
this.render();
}
set fallback(fb) {
this._fb = Number.isSafeInteger(parseInt(fb)) ? parseInt(fb) : fb;
}
get fallback() {
let choice;
if (typeof this._fb === 'number')
choice = this.choices[this._fb];
else if (typeof this._fb === 'string')
choice = { title: this._fb };
return choice || this._fb || { title: this.i18n.noMatches };
}
moveSelect(i) {
this.select = i;
if (this.suggestions[this.page].length > 0)
this.value = getVal(this.suggestions[this.page], i);
else this.value = this.fallback.value;
this.fire();
}
async complete(cb) {
const p = (this.completing = this.suggest(this.input, this.choices));
const suggestions = await p;
if (this.completing !== p) return;
this.suggestions = suggestions
.map((s, i, arr) => ({ title: getTitle(arr, i), value: getVal(arr, i), description: s.description }))
.reduce((arr, sug) => {
if (arr[arr.length - 1].length < this.limit)
arr[arr.length - 1].push(sug);
else arr.push([sug]);
return arr;
}, [[]]);
this.completing = false;
if (!this.suggestions[this.page])
this.page = 0;
// if (!this.suggestions.length && this.fallback) {
// const index = getIndex(this.choices, this.fallback);
// this.suggestions = [[]];
// if (index !== undefined)
// this.suggestions[0].push({ title: getTitle(this.choices, index), value: getVal(this.choices, index) });
// this.isFallback = true;
// }
const l = Math.max(suggestions.length - 1, 0);
this.moveSelect(Math.min(l, this.select));
cb && cb();
}
reset() {
this.input = '';
this.complete(() => {
this.moveSelect(this.initial !== void 0 ? this.initial : 0);
this.render();
});
this.render();
}
abort() {
this.done = this.aborted = true;
this.fire();
this.render();
this.out.write('\n');
this.close();
}
submit() {
this.done = true;
this.aborted = false;
this.fire();
this.render();
this.out.write('\n');
this.close();
}
_(c, key) { // TODO on ctrl+# go to page #
let s1 = this.input.slice(0, this.cursor);
let s2 = this.input.slice(this.cursor);
this.input = `${s1}${c}${s2}`;
this.cursor = s1.length+1;
this.complete(this.render);
this.render();
}
delete() {
if (this.cursor === 0) return this.bell();
let s1 = this.input.slice(0, this.cursor-1);
let s2 = this.input.slice(this.cursor);
this.input = `${s1}${s2}`;
this.complete(this.render);
this.cursor = this.cursor-1;
this.render();
}
deleteForward() {
if(this.cursor*this.scale >= this.rendered.length) return this.bell();
let s1 = this.input.slice(0, this.cursor);
let s2 = this.input.slice(this.cursor+1);
this.input = `${s1}${s2}`;
this.complete(this.render);
this.render();
}
first() {
this.moveSelect(0);
this.render();
}
last() {
this.moveSelect(this.suggestions[this.page].length - 1);
this.render();
}
up() {
if (this.select <= 0) return this.bell();
this.moveSelect(this.select - 1);
this.render();
}
down() {
if (this.select >= this.suggestions[this.page].length - 1) return this.bell();
this.moveSelect(this.select + 1);
this.render();
}
next() {
if (this.select === this.suggestions[this.page].length - 1) {
this.page = (this.page + 1) % this.suggestions.length;
this.moveSelect(0);
} else this.moveSelect(this.select + 1);
this.render();
}
nextPage() {
if (this.page >= this.suggestions.length - 1)
return this.bell();
this.page++;
this.moveSelect(0);
this.render();
}
prevPage() {
if (this.page <= 0)
return this.bell();
this.page--;
this.moveSelect(0);
this.render();
}
left() {
if (this.cursor <= 0) return this.bell();
this.cursor = this.cursor-1;
this.render();
}
right() {
if (this.cursor*this.scale >= this.rendered.length) return this.bell();
this.cursor = this.cursor+1;
this.render();
}
renderOption(v, hovered) {
let desc, title = v.title;
if (hovered) {
title = color.cyan(v.title);
if (v.description) {
desc = ` - ${v.description}`;
if (title.length + desc.length >= this.out.columns
|| v.description.split(/\r?\n/).length > 1) {
desc = '\n' + wrap(v.description, { width: this.out.columns })
}
}
}
return title + color.gray(desc || '');
}
render() {
if (this.closed) return;
if (!this.firstRender) this.out.write(clear(this.outputText));
super.render();
this.outputText = [
color.bold(style.symbol(this.done, this.aborted)),
color.bold(this.msg),
style.delimiter(this.completing),
this.done && this.suggestions[this.page][this.select]
? this.suggestions[this.page][this.select].title
: this.rendered = this.transform.render(this.input)
].join(' ');
if (!this.done) {
const suggestions = this.suggestions[this.page]
.map((item, i) => this.renderOption(item, this.select === i))
.join('\n');
this.outputText += `\n` + (suggestions || color.gray(this.fallback.title));
if (this.suggestions[this.page].length > 1) {
this.outputText += color.blue(`\nPage ${this.page+1}/${this.suggestions.length}`);
}
}
this.out.write(erase.line + cursor.to(0) + this.outputText);
}
}
module.exports = AutocompletePrompt;