26 lines
668 B
JavaScript
26 lines
668 B
JavaScript
export default class Completion {
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constructor(completions) {
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if (typeof completions.length !== 'number') {
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throw new TypeError('completions does not have a length in number');
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}
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this.completions = completions
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this.index = 0;
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}
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prev() {
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if (this.completions.length === 0) {
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return null;
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}
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this.index = (this.index + this.completions.length - 1) % this.completions.length
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return this.completions[this.index];
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}
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next() {
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if (this.completions.length === 0) {
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return null;
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}
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let item = this.completions[this.index];
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this.index = (this.index + 1) % this.completions.length
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return item;
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}
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}
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