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/*
* Table of Contents jQuery Plugin - jquery.toc
*
* Copyright 2013 Nikhil Dabas
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations
* under the License.
*
* The original script was modified to work within the red#martrix
* - added var pathname
*/
(function ($) {
"use strict";
// Builds a list with the table of contents in the current selector.
// options:
// content: where to look for headings
// headings: string with a comma-separated list of selectors to be used as headings, ordered
// by their relative hierarchy level
var toc = function (options) {
return this.each(function () {
var root = $(this),
data = root.data(),
thisOptions,
stack = [root], // The upside-down stack keeps track of list elements
listTag = this.tagName,
currentLevel = 0,
headingSelectors;
// Defaults: plugin parameters override data attributes, which override our defaults
thisOptions = $.extend(
{content: "body", headings: "h1,h2,h3"},
{content: data.toc || undefined, headings: data.tocHeadings || undefined},
options
);
headingSelectors = thisOptions.headings.split(",");
// Set up some automatic IDs if we do not already have them
$(thisOptions.content).find(thisOptions.headings).attr("id", function (index, attr) {
// Generate a valid ID: must start with a letter, and contain only letters and
// numbers. All other characters are replaced with underscores.
return attr ||
$(this).text().replace(/^[^A-Za-z]*/, "").replace(/[^A-Za-z0-9]+/g, "_");
}).each(function () {
// What level is the current heading?
var elem = $(this), level = $.map(headingSelectors, function (selector, index) {
return elem.is(selector) ? index : undefined;
})[0];
if (level > currentLevel) {
// If the heading is at a deeper level than where we are, start a new nested
// list, but only if we already have some list items in the parent. If we do
// not, that means that we're skipping levels, so we can just add new list items
// at the current level.
// In the upside-down stack, unshift = push, and stack[0] = the top.
var parentItem = stack[0].children("li:last")[0];
if (parentItem) {
stack.unshift($("<" + listTag + "/>").appendTo(parentItem));
}
} else {
// Truncate the stack to the current level by chopping off the 'top' of the
// stack. We also need to preserve at least one element in the stack - that is
// the containing element.
stack.splice(0, Math.min(currentLevel - level, Math.max(stack.length - 1, 0)));
}
// the variable pathname was added to the original script.
var pathname = window.location.pathname;
// Add the list item
$("<li/>").appendTo(stack[0]).append(
$("<a/>").text(elem.text()).attr("href", pathname + "#" + elem.attr("id"))
);
currentLevel = level;
});
});
}, old = $.fn.toc;
$.fn.toc = toc;
$.fn.toc.noConflict = function () {
$.fn.toc = old;
return this;
};
// Data API
$(function () {
toc.call($("[data-toc]"));
});
}(window.jQuery));
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