HackMD/public/js/slide.js

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/* eslint-env browser, jquery */
/* global serverurl, Reveal, RevealMarkdown */
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require('../css/extra.css')
require('../css/site.css')
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import { preventXSS } from './render'
import { md, updateLastChange, removeDOMEvents, finishView } from './extra'
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const body = preventXSS($('.slides').text())
window.createtime = window.lastchangeui.time.attr('data-createtime')
window.lastchangetime = window.lastchangeui.time.attr('data-updatetime')
updateLastChange()
const url = window.location.pathname
$('.ui-edit').attr('href', `${url}/edit`)
$('.ui-print').attr('href', `${url}?print-pdf`)
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$(document).ready(() => {
// tooltip
$('[data-toggle="tooltip"]').tooltip()
})
function extend () {
const target = {}
for (const source of arguments) {
for (const key in source) {
if (source.hasOwnProperty(key)) {
target[key] = source[key]
}
}
}
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return target
}
// Optional libraries used to extend on reveal.js
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const deps = [{
src: `${serverurl}/build/reveal.js/lib/js/classList.js`,
condition () {
return !document.body.classList
}
}, {
src: `${serverurl}/build/reveal.js/plugin/notes/notes.js`,
async: true,
condition () {
return !!document.body.classList
}
}]
const slideOptions = {
separator: '^(\r\n?|\n)---(\r\n?|\n)$',
verticalSeparator: '^(\r\n?|\n)----(\r\n?|\n)$'
}
const slides = RevealMarkdown.slidify(body, slideOptions)
$('.slides').html(slides)
RevealMarkdown.initialize()
removeDOMEvents($('.slides'))
$('.slides').show()
// default options to init reveal.js
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const defaultOptions = {
controls: true,
progress: true,
slideNumber: true,
history: true,
center: true,
transition: 'none',
dependencies: deps
}
// options from yaml meta
const meta = JSON.parse($('#meta').text())
var options = meta.slideOptions || {}
const view = $('.reveal')
// text language
if (meta.lang && typeof meta.lang === 'string') {
view.attr('lang', meta.lang)
} else {
view.removeAttr('lang')
}
// text direction
if (meta.dir && typeof meta.dir === 'string' && meta.dir === 'rtl') {
options.rtl = true
} else {
options.rtl = false
}
// breaks
if (typeof meta.breaks === 'boolean' && !meta.breaks) {
md.options.breaks = false
} else {
md.options.breaks = true
}
// options from URL query string
const queryOptions = Reveal.getQueryHash() || {}
options = extend(defaultOptions, options, queryOptions)
Reveal.initialize(options)
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window.viewAjaxCallback = () => {
Reveal.layout()
}
function renderSlide (event) {
if (window.location.search.match(/print-pdf/gi)) {
const slides = $('.slides')
let title = document.title
finishView(slides)
document.title = title
Reveal.layout()
} else {
const markdown = $(event.currentSlide)
if (!markdown.attr('data-rendered')) {
let title = document.title
finishView(markdown)
markdown.attr('data-rendered', 'true')
document.title = title
Reveal.layout()
}
}
}
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Reveal.addEventListener('ready', event => {
renderSlide(event)
const markdown = $(event.currentSlide)
// force browser redraw
setTimeout(() => {
markdown.hide().show(0)
}, 0)
})
Reveal.addEventListener('slidechanged', renderSlide)
const isWinLike = navigator.platform.indexOf('Win') > -1
if (isWinLike) $('.container').addClass('hidescrollbar')