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(function($){ $.fn.navigation = function() {
// the TOC already contains H1 so we start at H2
var headers = $('h2, h3, h4, h5').filter(function() {
// exclude examples
if (this.id.substr(0, 7) == 'example') {
return false;
}
// get all headers with an id
return this.id;
});
var output = $(this);
var get_level = function(n) { return parseInt(n.nodeName.replace('H', ''), 10); }
var back_to_top = '<span title="Return to top" class="to_top octicon octicon-chevron-up"></span>';
if (headers.length && output.length) {
var level = get_level(headers[0]);
var current_level;
var html = '<ol>';
headers.each(function(_, header) {
current_level = get_level(header);
if (current_level === level) {
// same level as before
html += '<li><a href="#' + header.id + '">' + header.innerHTML + '</a>';
} else if (current_level <= level) {
// higher level, we go back up and chose intermediary lists
for(i = current_level; i < level; i++) {
html += '</li></ol>';
}
html += '<li><a href="#' + header.id + '">' + header.innerHTML + '</a>';
} else if (current_level > level) {
// lower level, we open new nested lists
for(i = current_level; i > level; i--) {
html += '<ol><li>';
}
html += '<a href="#' + header.id + '">' + header.innerHTML + '</a>';
}
var header_link = '<a class="anchor" href="#' + header.id + '"><span class="octicon octicon-link"></span></a>';
$(header).prepend(header_link);
if (!$(header).prev().is('h1')) {
$(header).after(back_to_top);
}
level = current_level;
});
html += '</ol>';
output.html(html);
}
// back to top links
$(document).on('click', '.to_top', function() {
$(window).scrollTop(0);
window.location.hash = '';
});
// we add one more at the end of the document
$('#content-container').append(back_to_top);
};})(jQuery);
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