69 lines
1.9 KiB
JavaScript
69 lines
1.9 KiB
JavaScript
require(['gitbook', 'jQuery'], function(gitbook, $) {
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var TOGGLE_CLASSNAME = 'expanded',
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CHAPTER = '.chapter',
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ARTICLES = '.articles',
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TRIGGER_TEMPLATE = '<i class="exc-trigger fa"></i>',
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LS_NAMESPACE = 'expChapters';
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var init = function () {
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// adding the trigger element to each ARTICLES parent and binding the event
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$(ARTICLES)
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.parent(CHAPTER)
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.children('a')
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.append(
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$(TRIGGER_TEMPLATE)
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.on('click', function(e) {
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e.preventDefault();
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e.stopPropagation();
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toggle($(e.target).closest(CHAPTER));
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})
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);
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expand(lsItem());
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//expand current selected chapter with it's parents
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var activeChapter = $(CHAPTER + '.active');
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expand(activeChapter);
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expand(activeChapter.parents(CHAPTER));
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}
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var toggle = function ($chapter) {
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if ($chapter.hasClass('expanded')) {
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collapse($chapter);
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} else {
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expand($chapter);
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}
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}
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var collapse = function ($chapter) {
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if ($chapter.length && $chapter.hasClass(TOGGLE_CLASSNAME)) {
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$chapter.removeClass(TOGGLE_CLASSNAME);
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lsItem($chapter);
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}
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}
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var expand = function ($chapter) {
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if ($chapter.length && !$chapter.hasClass(TOGGLE_CLASSNAME)) {
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$chapter.addClass(TOGGLE_CLASSNAME);
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lsItem($chapter);
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}
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}
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var lsItem = function () {
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var map = JSON.parse(localStorage.getItem(LS_NAMESPACE)) || {}
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if (arguments.length) {
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var $chapters = arguments[0];
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$chapters.each(function (index, element) {
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var level = $(this).data('level');
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var value = $(this).hasClass(TOGGLE_CLASSNAME);
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map[level] = value;
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})
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localStorage.setItem(LS_NAMESPACE, JSON.stringify(map));
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} else {
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return $(CHAPTER).map(function(index, element){
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if (map[$(this).data('level')]) {
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return this;
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}
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})
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}
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}
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gitbook.events.bind('page.change', function() {
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init()
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});
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});
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