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Copyright (c) 2013 Alex Ghiculescu | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy | ||
of this software and associated documentation files (the "Software"), to deal | ||
in the Software without restriction, including without limitation the rights | ||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
copies of the Software, and to permit persons to whom the Software is | ||
furnished to do so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in | ||
all copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
THE SOFTWARE. |
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// https://github.com/ghiculescu/jekyll-table-of-contents | ||
// share under MIT License | ||
(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: '', | ||
link: '' | ||
} | ||
}, | ||
settings = $.extend(defaults, options); | ||
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function fixedEncodeURIComponent (str) { | ||
return encodeURIComponent(str).replace(/[!'()*]/g, function(c) { | ||
return '%' + c.charCodeAt(0).toString(16); | ||
}); | ||
} | ||
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function createLink (header) { | ||
var innerText = (header.textContent === undefined) ? header.innerText : header.textContent; | ||
return "<a class='"+settings.classes.link+"' href='#" + fixedEncodeURIComponent(header.id) + "'>" + innerText + "</a>"; | ||
} | ||
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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, "-") ); | ||
} | ||
return this.id; | ||
}), output = $(this); | ||
if (!headers.length || headers.length < settings.minimumHeaders || !output.length) { | ||
$(this).hide(); | ||
return; | ||
} | ||
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if (0 === settings.showSpeed) { | ||
settings.showEffect = 'none'; | ||
} | ||
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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); } | ||
}; | ||
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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>'; | ||
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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 = ''; | ||
}); | ||
} | ||
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render[settings.showEffect](); | ||
}; | ||
})(jQuery); |
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