46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
import * as EventEmitter from 'eventemitter3';
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export class Line extends EventEmitter {
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constructor(text) {
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super();
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this.text = text;
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this.active = false;
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}
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getDOMNode() {
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this.container = document.createElement('div');
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this.container.setAttribute('aria-role', 'polite');
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this.textField = document.createElement('div');
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this.container.appendChild(this.textField);
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this.advanceButton = document.createElement('button');
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this.advanceButton.textContent = 'Advance';
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this.advanceButton.addEventListener('click', (event) => {
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this.emit('advance');
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this.active = false;
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});
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this.container.appendChild(this.advanceButton);
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return this.container;
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}
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display(element, appearingCharacters = false, appearingCharacterSpeed = 0) {
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this.active = true;
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this.textField.focus();
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if (!appearingCharacters) {
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this.textField.textContent = this.text;
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}
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else {
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this.fillText(0, appearingCharacterSpeed);
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}
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}
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fillText(index, speed) {
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if (!this.active)
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return;
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if (index > this.text.length) {
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return;
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}
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this.textField.textContent += this.text.charAt(index);
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this.emit('character.appear', this.textField.textContent);
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setTimeout(() => this.fillText((index += 1), speed), speed);
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}
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getAdvanceButton() {
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return this.advanceButton;
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}
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}
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