128 lines
4.9 KiB
JavaScript
128 lines
4.9 KiB
JavaScript
/**
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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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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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var url = location.origin + location.pathname;
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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 = 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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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)
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this.tocContent += '<ul class="' + this.ulClass + '">';
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else
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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)
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this.tocContent = '<ul class="' + this.ulClass + '">' + this.tocContent + '</ul>';
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else
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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); |