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// https://github.com/ghiculescu/jekyll-table-of-contents
(function ($) {
$.fn.toc = function (options) {
var defaults = {
noBackToTopLinks: false,
title: '<i>Jump to...</i>',
minimumHeaders: 3,
headers: 'h1, h2, h3, h4, h5, h6',
listType: 'ol', // values: [ol|ul]
showEffect: 'show', // values: [show|slideDown|fadeIn|none]
showSpeed: 'slow', // set to 0 to deactivate effect
classes: {
list: '',
item: ''
}
},
settings = $.extend(defaults, options);
function fixedEncodeURIComponent(str) {
return encodeURIComponent(str).replace(/[!'()*]/g, function (c) {
return '%' + c.charCodeAt(0).toString(16);
});
}
function createLink(header) {
var innerText = (header.textContent === undefined) ? header.innerText : header.textContent;
return "<a href='#" + fixedEncodeURIComponent(header.id) + "'>" + innerText + "</a>";
}
var headers = $(settings.headers).filter(function () {
// get all headers with an ID
var previousSiblingName = $(this).prev().attr("name");
if (!this.id && previousSiblingName) {
this.id = $(this).attr("id", previousSiblingName.replace(/\./g, "-"));
}
// Yehonal
if (!this.id) {
this.id = $(this).text().replace(/\W/g, '_');
}
return this.id;
}), output = $(this);
if (!headers.length || headers.length < settings.minimumHeaders || !output.length) {
$(this).hide();
return;
}
if (0 === settings.showSpeed) {
settings.showEffect = 'none';
}
var render = {
show: function () { output.hide().html(html).show(settings.showSpeed); },
slideDown: function () { output.hide().html(html).slideDown(settings.showSpeed); },
fadeIn: function () { output.hide().html(html).fadeIn(settings.showSpeed); },
none: function () { output.html(html); }
};
var get_level = function (ele) { return parseInt(ele.nodeName.replace("H", ""), 10); };
var highest_level = headers.map(function (_, ele) { return get_level(ele); }).get().sort()[0];
var return_to_top = '<i class="icon-arrow-up back-to-top"> </i>';
var level = get_level(headers[0]),
this_level,
html = settings.title + " <" + settings.listType + " class=\"" + settings.classes.list + "\">";
headers.on('click', function () {
if (!settings.noBackToTopLinks) {
window.location.hash = this.id;
}
})
.addClass('clickable-header')
.each(function (_, header) {
this_level = get_level(header);
if (!settings.noBackToTopLinks && this_level === highest_level) {
$(header).addClass('top-level-header').after(return_to_top);
}
if (this_level === level) // same level as before; same indenting
html += "<li class=\"" + settings.classes.item + "\">" + createLink(header);
else if (this_level <= level) { // higher level than before; end parent ol
for (var i = this_level; i < level; i++) {
html += "</li></" + settings.listType + ">"
}
html += "<li class=\"" + settings.classes.item + "\">" + createLink(header);
}
else if (this_level > level) { // lower level than before; expand the previous to contain a ol
for (i = this_level; i > level; i--) {
html += "<" + settings.listType + " class=\"" + settings.classes.list + "\">" +
"<li class=\"" + settings.classes.item + "\">"
}
html += createLink(header);
}
level = this_level; // update for the next one
});
html += "</" + settings.listType + ">";
if (!settings.noBackToTopLinks) {
$(document).on('click', '.back-to-top', function () {
$(window).scrollTop(0);
window.location.hash = '';
});
}
render[settings.showEffect]();
};
})(jQuery);
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