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