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render.js
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render.js
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import marked from 'marked'
import Prism from 'prismjs'
import * as tpl from './tpl'
import * as event from './event'
import * as polyfill from './polyfill'
import { genTree, getRoute, isMobile, slugify, merge, emojify } from './util'
let markdown = marked
let toc = []
const CACHE = {}
const originTitle = document.title
const renderTo = function (dom, content) {
dom = typeof dom === 'object' ? dom : document.querySelector(dom)
dom.innerHTML = content
slugify.clear()
return dom
}
/**
* init render
*/
export function init () {
const renderer = new marked.Renderer()
/**
* render anchor tag
* @link https://github.com/chjj/marked#overriding-renderer-methods
*/
renderer.heading = function (text, level) {
const slug = slugify(text)
let route = ''
route = `#/${getRoute()}`
toc.push({ level, slug: `${route}#${encodeURIComponent(slug)}`, title: text })
return `<h${level} id="${slug}"><a href="${route}#${slug}" data-id="${slug}" class="anchor"><span>${text}</span></a></h${level}>`
}
// highlight code
renderer.code = function (code, lang = '') {
const hl = Prism.highlight(code, Prism.languages[lang] || Prism.languages.markup)
return `<pre v-pre data-lang="${lang}"><code class="lang-${lang}">${hl}</code></pre>`
}
renderer.link = function (href, title, text) {
if (!/[:|\/+]/.test(href)) {
href = `#/${href}`.replace(/\/+/g, '/')
}
return `<a href="${href}" title="${title || ''}">${text}</a>`
}
renderer.paragraph = function (text) {
if (/^!>/.test(text)) {
return tpl.helper('tip', text)
} else if (/^\?>/.test(text)) {
return tpl.helper('warn', text)
}
return `<p>${text}</p>`
}
renderer.image = function (href, title, text) {
const url = /[:|\/+]/.test(href) ? href : ($docsify.basePath + href).replace(/\/+/g, '/')
const titleHTML = title ? ` title="${title}"` : ''
return `<img src="${url}" alt="${text}"${titleHTML} />`
}
if (typeof $docsify.markdown === 'function') {
markdown.setOptions({ renderer })
markdown = $docsify.markdown.call(this, markdown)
} else {
markdown.setOptions(merge({ renderer }, $docsify.markdown))
}
const md = markdown
markdown = text => emojify(md(text))
window.Docsify.utils.marked = text => {
const result = markdown(text)
toc = []
return result
}
}
/**
* App
*/
export function renderApp (dom, replace) {
const nav = document.querySelector('nav') || document.createElement('nav')
const body = document.body
const head = document.head
if (!$docsify.repo) nav.classList.add('no-badge')
dom[replace ? 'outerHTML' : 'innerHTML'] = tpl.corner($docsify.repo) +
($docsify.coverpage ? tpl.cover() : '') +
tpl.main()
body.insertBefore(nav, body.children[0])
// theme color
if ($docsify.themeColor) {
head.innerHTML += tpl.theme($docsify.themeColor)
polyfill.cssVars()
}
// render name
if ($docsify.name) {
const aside = document.querySelector('.sidebar')
aside.innerHTML = `<h1><a href="${$docsify.nameLink}">${$docsify.name}</a></h1>` + aside.innerHTML
}
// bind toggle
event.bindToggle('button.sidebar-toggle')
// bind sticky effect
if ($docsify.coverpage) {
!isMobile() && window.addEventListener('scroll', event.sticky)
} else {
body.classList.add('sticky')
}
}
/**
* article
*/
export function renderArticle (content) {
const hook = window.Docsify.hook
const renderFn = function (data) {
renderTo('article', data)
if (!$docsify.loadSidebar) renderSidebar()
if (data && typeof Vue !== 'undefined') {
CACHE.vm && CACHE.vm.$destroy()
const script = [].slice.call(
document.body.querySelectorAll('article>script'))
.filter(script => !/template/.test(script.type)
)[0]
const code = script ? script.innerText.trim() : null
script && script.remove()
CACHE.vm = code
? new Function(`return ${code}`)()
: new Vue({ el: 'main' }) // eslint-disable-line
CACHE.vm && CACHE.vm.$nextTick(_ => event.scrollActiveSidebar())
}
if ($docsify.auto2top) setTimeout(() => event.scroll2Top($docsify.auto2top), 0)
}
hook.emit('before', content, result => {
const html = result ? markdown(result) : ''
hook.emit('after', html, result => renderFn(result || 'not found'))
})
}
/**
* navbar
*/
export function renderNavbar (content) {
if (CACHE.navbar && CACHE.navbar === content) return
CACHE.navbar = content
if (content) renderTo('nav', markdown(content))
event.activeLink('nav')
}
/**
* sidebar
*/
export function renderSidebar (content) {
let html
if (content) {
html = markdown(content)
// find url tag
html = html.match(/<ul[^>]*>([\s\S]+)<\/ul>/g)[0]
} else {
html = tpl.tree(genTree(toc, $docsify.maxLevel), '<ul>')
}
renderTo('.sidebar-nav', html)
if (toc[0] && toc[0].level === 1) {
document.title = `${toc[0].title}${originTitle ? ' - ' + originTitle : ''}`
}
const target = event.activeLink('.sidebar-nav', true)
if (target) renderSubSidebar(target)
toc = []
event.scrollActiveSidebar()
}
export function renderSubSidebar (target) {
if (!$docsify.subMaxLevel) return
toc[0] && toc[0].level === 1 && toc.shift()
target.parentNode.innerHTML += tpl.tree(genTree(toc, $docsify.subMaxLevel), '<ul>')
}
/**
* Cover Page
*/
export function renderCover (content) {
renderCover.dom = renderCover.dom || document.querySelector('section.cover')
if (!content) {
renderCover.dom.classList.remove('show')
return
}
renderCover.dom.classList.add('show')
if (renderCover.rendered) return event.sticky()
// render cover
const cacheToc = toc.slice()
let html = markdown(content)
const match = html.trim().match('<p><img[^s]+src="(.*?)"[^a]+alt="(.*?)">([^<]*?)</p>$')
toc = cacheToc.slice()
// render background
if (match) {
const coverEl = document.querySelector('section.cover')
if (match[2] === 'color') {
coverEl.style.background = match[1] + (match[3] || '')
} else {
coverEl.classList.add('has-mask')
coverEl.style.backgroundImage = `url(${match[1]})`
}
html = html.replace(match[0], '')
}
renderTo('.cover-main', html)
renderCover.rendered = true
event.sticky()
}
/**
* render loading bar
* @return {[type]} [description]
*/
export function renderLoading ({ loaded, total, step }) {
let num
if (!CACHE.loading) {
const div = document.createElement('div')
div.classList.add('progress')
document.body.appendChild(div)
CACHE.loading = div
}
if (step) {
num = parseInt(CACHE.loading.style.width, 10) + step
num = num > 80 ? 80 : num
} else {
num = Math.floor(loaded / total * 100)
}
CACHE.loading.style.opacity = 1
CACHE.loading.style.width = num >= 95 ? '100%' : num + '%'
if (num >= 95) {
clearTimeout(renderLoading.cacheTimeout)
renderLoading.cacheTimeout = setTimeout(_ => {
CACHE.loading.style.opacity = 0
CACHE.loading.style.width = '0%'
}, 200)
}
}