110 lines
2.8 KiB
JavaScript
110 lines
2.8 KiB
JavaScript
'use strict';
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const Select = require('./select');
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const highlight = (input, color) => {
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let val = input.toLowerCase();
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return str => {
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let s = str.toLowerCase();
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let i = s.indexOf(val);
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let colored = color(str.slice(i, i + val.length));
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return str.slice(0, i) + colored + str.slice(i + val.length);
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};
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};
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class AutoComplete extends Select {
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constructor(options) {
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super(options);
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this.cursorShow();
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}
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moveCursor(n) {
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this.state.cursor += n;
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}
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dispatch(ch) {
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return this.append(ch);
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}
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space(ch) {
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return this.options.multiple ? super.space(ch) : this.append(ch);
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}
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append(ch) {
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let { cursor, input } = this.state;
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this.input = input.slice(0, cursor) + ch + input.slice(cursor);
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this.moveCursor(1);
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return this.complete();
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}
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delete() {
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let { cursor, input } = this.state;
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if (!input) return this.alert();
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this.input = input.slice(0, cursor - 1) + input.slice(cursor);
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this.moveCursor(-1);
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return this.complete();
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}
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deleteForward() {
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let { cursor, input } = this.state;
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if (input[cursor] === void 0) return this.alert();
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this.input = `${input}`.slice(0, cursor) + `${input}`.slice(cursor + 1);
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return this.complete();
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}
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async complete() {
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this.completing = true;
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this.choices = await this.suggest(this.input, this.state._choices);
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this.state.limit = void 0; // allow getter/setter to reset limit
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this.index = Math.min(Math.max(this.visible.length - 1, 0), this.index);
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await this.render();
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this.completing = false;
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}
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suggest(input = this.input, choices = this.state._choices) {
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if (typeof this.options.suggest === 'function') {
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return this.options.suggest.call(this, input, choices);
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}
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let str = input.toLowerCase();
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return choices.filter(ch => ch.message.toLowerCase().includes(str));
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}
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pointer() {
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return '';
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}
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format() {
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if (!this.focused) return this.input;
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if (this.options.multiple && this.state.submitted) {
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return this.selected.map(ch => this.styles.primary(ch.message)).join(', ');
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}
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if (this.state.submitted) {
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let value = this.value = this.input = this.focused.value;
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return this.styles.primary(value);
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}
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return this.input;
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}
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async render() {
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if (this.state.status !== 'pending') return super.render();
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let style = this.options.highlight
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? this.options.highlight.bind(this)
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: this.styles.placeholder;
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let color = highlight(this.input, style);
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let choices = this.choices;
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this.choices = choices.map(ch => ({ ...ch, message: color(ch.message) }));
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await super.render();
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this.choices = choices;
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}
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submit() {
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if (this.options.multiple) {
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this.value = this.selected.map(ch => ch.name);
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}
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return super.submit();
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}
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}
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module.exports = AutoComplete;
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