193 lines
5.0 KiB
JavaScript
193 lines
5.0 KiB
JavaScript
'use strict';
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const color = require('kleur');
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const _require = require('sisteransi'),
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cursor = _require.cursor;
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const MultiselectPrompt = require('./multiselect');
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const _require2 = require('../util'),
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clear = _require2.clear,
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style = _require2.style,
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figures = _require2.figures;
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/**
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* MultiselectPrompt Base Element
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* @param {Object} opts Options
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* @param {String} opts.message Message
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* @param {Array} opts.choices Array of choice objects
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* @param {String} [opts.hint] Hint to display
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* @param {String} [opts.warn] Hint shown for disabled choices
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* @param {Number} [opts.max] Max choices
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* @param {Number} [opts.cursor=0] Cursor start position
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* @param {Stream} [opts.stdin] The Readable stream to listen to
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* @param {Stream} [opts.stdout] The Writable stream to write readline data to
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*/
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class AutocompleteMultiselectPrompt extends MultiselectPrompt {
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constructor(opts = {}) {
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opts.overrideRender = true;
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super(opts);
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this.inputValue = '';
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this.clear = clear('');
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this.filteredOptions = this.value;
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this.render();
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}
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last() {
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this.cursor = this.filteredOptions.length - 1;
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this.render();
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}
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next() {
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this.cursor = (this.cursor + 1) % this.filteredOptions.length;
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this.render();
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}
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up() {
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if (this.cursor === 0) {
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this.cursor = this.filteredOptions.length - 1;
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} else {
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this.cursor--;
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}
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this.render();
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}
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down() {
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if (this.cursor === this.filteredOptions.length - 1) {
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this.cursor = 0;
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} else {
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this.cursor++;
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}
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this.render();
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}
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left() {
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this.filteredOptions[this.cursor].selected = false;
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this.render();
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}
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right() {
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if (this.value.filter(e => e.selected).length >= this.maxChoices) return this.bell();
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this.filteredOptions[this.cursor].selected = true;
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this.render();
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}
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delete() {
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if (this.inputValue.length) {
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this.inputValue = this.inputValue.substr(0, this.inputValue.length - 1);
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this.updateFilteredOptions();
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}
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}
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updateFilteredOptions() {
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const currentHighlight = this.filteredOptions[this.cursor];
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this.filteredOptions = this.value.filter(v => {
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if (this.inputValue) {
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if (typeof v.title === 'string') {
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if (v.title.toLowerCase().includes(this.inputValue.toLowerCase())) {
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return true;
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}
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}
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if (typeof v.value === 'string') {
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if (v.value.toLowerCase().includes(this.inputValue.toLowerCase())) {
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return true;
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}
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}
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return false;
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}
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return true;
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});
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const newHighlightIndex = this.filteredOptions.findIndex(v => v === currentHighlight);
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this.cursor = newHighlightIndex < 0 ? 0 : newHighlightIndex;
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this.render();
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}
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handleSpaceToggle() {
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const v = this.filteredOptions[this.cursor];
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if (v.selected) {
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v.selected = false;
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this.render();
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} else if (v.disabled || this.value.filter(e => e.selected).length >= this.maxChoices) {
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return this.bell();
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} else {
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v.selected = true;
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this.render();
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}
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}
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handleInputChange(c) {
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this.inputValue = this.inputValue + c;
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this.updateFilteredOptions();
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}
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_(c, key) {
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if (c === ' ') {
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this.handleSpaceToggle();
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} else {
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this.handleInputChange(c);
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}
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}
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renderInstructions() {
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return `
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Instructions:
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${figures.arrowUp}/${figures.arrowDown}: Highlight option
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${figures.arrowLeft}/${figures.arrowRight}/[space]: Toggle selection
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[a,b,c]/delete: Filter choices
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enter/return: Complete answer
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`;
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}
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renderCurrentInput() {
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return `
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Filtered results for: ${this.inputValue ? this.inputValue : color.gray('Enter something to filter')}\n`;
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}
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renderOption(cursor, v, i) {
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let title;
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if (v.disabled) title = cursor === i ? color.gray().underline(v.title) : color.strikethrough().gray(v.title);else title = cursor === i ? color.cyan().underline(v.title) : v.title;
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return (v.selected ? color.green(figures.radioOn) : figures.radioOff) + ' ' + title;
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}
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renderDoneOrInstructions() {
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if (this.done) {
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return this.value.filter(e => e.selected).map(v => v.title).join(', ');
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}
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const output = [color.gray(this.hint), this.renderInstructions(), this.renderCurrentInput()];
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if (this.filteredOptions.length && this.filteredOptions[this.cursor].disabled) {
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output.push(color.yellow(this.warn));
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}
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return output.join(' ');
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}
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render() {
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if (this.closed) return;
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if (this.firstRender) this.out.write(cursor.hide);
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super.render(); // print prompt
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let prompt = [style.symbol(this.done, this.aborted), color.bold(this.msg), style.delimiter(false), this.renderDoneOrInstructions()].join(' ');
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if (this.showMinError) {
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prompt += color.red(`You must select a minimum of ${this.minSelected} choices.`);
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this.showMinError = false;
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}
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prompt += this.renderOptions(this.filteredOptions);
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this.out.write(this.clear + prompt);
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this.clear = clear(prompt);
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}
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}
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module.exports = AutocompleteMultiselectPrompt; |