imported ghiculescu/jekyll-table-of-contents

1 files changed, 98 insertions, 0 deletions

diff --git a/assets/js/wiki-features.js b/assets/js/wiki-features.js
index 8b13789..bb35cd3 100644
--- a/assets/js/wiki-features.js
+++ b/assets/js/wiki-features.js
@@ -1 +1,99 @@
 
+// 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, "-") );
+      }
+      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);