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/**
* Text special effect for Petros where each word fades in
*/
import React, { Component } from 'react'
export default class PetrosText extends Component {
constructor(props) {
super(props)
this.state = { index: -1, words: [] }
this.next = this.next.bind(this)
}
componentDidUpdate(prevProps) {
if (this.props.ready && !prevProps.ready) {
this.start()
} else if (!this.props.ready) {
clearTimeout(this.timeout)
}
}
componentDidUnmount() {
clearTimeout(this.timeout)
}
start() {
const { timePerWord, text } = this.props
this.setState({
words: this.props.text.trim().split(" "),
index: -1
})
clearTimeout(this.timeout)
this.timeout = setTimeout(this.next, timePerWord)
}
next() {
const { timePerWord, onComplete } = this.props
const { index, words } = this.state
if (index < words.length) {
this.timeout = setTimeout(this.next, timePerWord)
this.setState({ index: index + 1 })
} else {
onComplete()
}
}
render() {
const { index, words } = this.state
return (
<div className="fade-words">
{words.map((word, i) => (
<span key={i} className={i <= index ? "visible" : ""}>{word}</span>
))}
</div>
)
}
}
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