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57 lines
1.5 KiB
57 lines
1.5 KiB
const { qs } = require('../utils')
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module.exports = function initButtons (input) {
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let container = qs('#action-buttons')
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// button labels
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let labels = []
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// button elements
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let buttons = []
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// add a button element
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let pushButton = function pushButton () {
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let button = document.createElement('button')
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button.classList.add('action-button')
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button.setAttribute('data-n', buttons.length)
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buttons.push(button)
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container.appendChild(button)
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button.addEventListener('click', e => {
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// might as well use the attribute ¯\_(ツ)_/¯
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let index = +button.getAttribute('data-n')
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input.sendButton(index)
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})
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return button
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}
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// remove a button element
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let popButton = function popButton () {
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let button = buttons.pop()
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button.parentNode.removeChild(button)
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}
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// sync with DOM
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let update = function updateButtons () {
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if (labels.length > buttons.length) {
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for (let i = buttons.length; i < labels.length; i++) {
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pushButton()
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}
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} else if (buttons.length > labels.length) {
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for (let i = labels.length; i <= buttons.length; i++) {
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popButton()
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}
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}
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for (let i = 0; i < labels.length; i++) {
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let label = labels[i].trim()
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let button = buttons[i]
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button.textContent = label || '\u00a0' // label or nbsp
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if (!label) button.classList.add('inactive')
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else button.classList.remove('inactive')
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}
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}
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return { update, labels }
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}
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