HackMD/public/vendor/md-toc.js
Sheogorath 7681076eb3
Add title attribute in table of contents
Right now the full title of an element is may not shown as the space of
the ToC is limited. With this path it'll be shower on hover and this way
provide more useful information.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>
2018-03-26 11:20:18 +02:00

124 lines
4.3 KiB
JavaScript

/* eslint-env browser, jquery */
/**
* md-toc.js v1.0.2
* https://github.com/yijian166/md-toc.js
*/
(function (window) {
function Toc (id, options) {
this.el = document.getElementById(id)
if (!this.el) return
this.options = options || {}
this.tocLevel = parseInt(options.level) || 0
this.tocClass = options['class'] || 'toc'
this.ulClass = options['ulClass']
this.tocTop = parseInt(options.top) || 0
this.elChilds = this.el.children
this.process = options['process']
if (!this.elChilds.length) return
this._init()
}
Toc.prototype._init = function () {
this._collectTitleElements()
this._createTocContent()
this._showToc()
}
Toc.prototype._collectTitleElements = function () {
this._elTitlesNames = []
this.elTitleElements = []
for (var i = 1; i < 7; i++) {
if (this.el.getElementsByTagName('h' + i).length) {
this._elTitlesNames.push('h' + i)
}
}
this._elTitlesNames.length = this._elTitlesNames.length > this.tocLevel ? this.tocLevel : this._elTitlesNames.length
for (var j = 0; j < this.elChilds.length; j++) {
this._elChildName = this.elChilds[j].tagName.toLowerCase()
if (this._elTitlesNames.toString().match(this._elChildName)) {
this.elTitleElements.push(this.elChilds[j])
}
}
}
Toc.prototype._createTocContent = function () {
this._elTitleElementsLen = this.elTitleElements.length
if (!this._elTitleElementsLen) return
this.tocContent = ''
this._tempLists = []
for (var i = 0; i < this._elTitleElementsLen; i++) {
var j = i + 1
this._elTitleElement = this.elTitleElements[i]
this._elTitleElementName = this._elTitleElement.tagName
this._elTitleElementTitle = this._elTitleElement.textContent.replace(/"/g, '&quot;')
this._elTitleElementText = (typeof this.process === 'function' ? this.process(this._elTitleElement) : this._elTitleElement.innerHTML).replace(/<(?:.|\n)*?>/gm, '')
var id = this._elTitleElement.getAttribute('id')
if (!id) {
this._elTitleElement.setAttribute('id', 'tip' + i)
id = '#tip' + i
} else {
id = '#' + id
}
this.tocContent += '<li><a href="' + id + '" title="'+ this._elTitleElementTitle +'">' + this._elTitleElementText + '</a>'
if (j !== this._elTitleElementsLen) {
this._elNextTitleElementName = this.elTitleElements[j].tagName
if (this._elTitleElementName !== this._elNextTitleElementName) {
var checkColse = false
var y = 1
for (var t = this._tempLists.length - 1; t >= 0; t--) {
if (this._tempLists[t].tagName === this._elNextTitleElementName) {
checkColse = true
break
}
y++
}
if (checkColse) {
this.tocContent += new Array(y + 1).join('</li></ul>')
this._tempLists.length = this._tempLists.length - y
} else {
this._tempLists.push(this._elTitleElement)
if (this.ulClass) { this.tocContent += '<ul class="' + this.ulClass + '">' } else { this.tocContent += '<ul>' }
}
} else {
this.tocContent += '</li>'
}
} else {
if (this._tempLists.length) {
this.tocContent += new Array(this._tempLists.length + 1).join('</li></ul>')
} else {
this.tocContent += '</li>'
}
}
}
if (this.ulClass) { this.tocContent = '<ul class="' + this.ulClass + '">' + this.tocContent + '</ul>' } else { this.tocContent = '<ul>' + this.tocContent + '</ul>' }
}
Toc.prototype._showToc = function () {
this.toc = document.createElement('div')
this.toc.innerHTML = this.tocContent
this.toc.setAttribute('class', this.tocClass)
if (!this.options.targetId) {
this.el.appendChild(this.toc)
} else {
document.getElementById(this.options.targetId).appendChild(this.toc)
}
var self = this
if (this.tocTop > -1) {
window.onscroll = function () {
var t = document.documentElement.scrollTop || document.body.scrollTop
if (t < self.tocTop) {
self.toc.setAttribute('style', 'position:absolute;top:' + self.tocTop + 'px;')
} else {
self.toc.setAttribute('style', 'position:fixed;top:10px;')
}
}
}
}
window.Toc = Toc
})(window)