233 lines
7.9 KiB
JavaScript
233 lines
7.9 KiB
JavaScript
gitbook.require(["gitbook", "lodash", "jQuery"], function(gitbook, _, $) {
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var gs = gitbook.storage;
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gitbook.events.bind("start", function(e, config) {
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// add the Edit button (edit on Github)
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var edit = config.edit;
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if (edit && edit.link) gitbook.toolbar.createButton({
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icon: 'fa fa-edit',
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label: edit.text || 'Edit',
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position: 'left',
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onClick: function(e) {
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e.preventDefault();
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window.open(edit.link);
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}
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});
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// add the History button (file history on Github)
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var history = config.history;
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if (history && history.link) gitbook.toolbar.createButton({
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icon: 'fa fa-history',
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label: history.text || 'History',
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position: 'left',
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onClick: function(e) {
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e.preventDefault();
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window.open(history.link);
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}
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});
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var down = config.download;
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var normalizeDownload = function() {
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if (!down || !(down instanceof Array) || down.length === 0) return;
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if (down[0] instanceof Array) return down;
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return $.map(down, function(file, i) {
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return [[file, file.replace(/.*[.]/g, '').toUpperCase()]];
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});
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};
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down = normalizeDownload(down);
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if (down) if (down.length === 1 && /[.]pdf$/.test(down[0][0])) {
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gitbook.toolbar.createButton({
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icon: 'fa fa-file-pdf-o',
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label: down[0][1],
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position: 'left',
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onClick: function(e) {
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e.preventDefault();
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window.open(down[0][0]);
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}
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});
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} else {
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gitbook.toolbar.createButton({
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icon: 'fa fa-download',
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label: 'Download',
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position: 'left',
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dropdown: $.map(down, function(item, i) {
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return {
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text: item[1],
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onClick: function(e) {
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e.preventDefault();
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window.open(item[0]);
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}
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};
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})
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});
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}
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// highlight the current section in TOC
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var href = window.location.pathname;
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href = href.substr(href.lastIndexOf('/') + 1);
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if (href === '') href = 'index.html';
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var li = $('a[href^="' + href + location.hash + '"]').parent('li.chapter').first();
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var summary = $('ul.summary'), chaps = summary.find('li.chapter');
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if (li.length === 0) li = chaps.first();
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li.addClass('active');
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chaps.on('click', function(e) {
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chaps.removeClass('active');
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$(this).addClass('active');
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gs.set('tocScrollTop', summary.scrollTop());
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});
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var toc = config.toc;
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// collapse TOC items that are not for the current chapter
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if (toc && toc.collapse) (function() {
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var type = toc.collapse;
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if (type === 'none') return;
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if (type !== 'section' && type !== 'subsection') return;
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// sections under chapters
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var toc_sub = summary.children('li[data-level]').children('ul');
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if (type === 'section') {
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toc_sub.hide()
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.parent().has(li).children('ul').show();
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} else {
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toc_sub.children('li').children('ul').hide()
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.parent().has(li).children('ul').show();
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}
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li.children('ul').show();
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var toc_sub2 = toc_sub.children('li');
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if (type === 'section') toc_sub2.children('ul').hide();
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summary.children('li[data-level]').find('a')
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.on('click.bookdown', function(e) {
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if (href === $(this).attr('href').replace(/#.*/, ''))
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$(this).parent('li').children('ul').toggle();
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});
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})();
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// add tooltips to the <a>'s that are truncated
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$('a').each(function(i, el) {
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if (el.offsetWidth >= el.scrollWidth) return;
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if (typeof el.title === 'undefined') return;
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el.title = el.text;
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});
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// restore TOC scroll position
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var pos = gs.get('tocScrollTop');
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if (typeof pos !== 'undefined') summary.scrollTop(pos);
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// highlight the TOC item that has same text as the heading in view as scrolling
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if (toc && toc.scroll_highlight !== false) (function() {
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// scroll the current TOC item into viewport
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var ht = $(window).height(), rect = li[0].getBoundingClientRect();
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if (rect.top >= ht || rect.top <= 0 || rect.bottom <= 0) {
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summary.scrollTop(li[0].offsetTop);
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}
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// current chapter TOC items
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var items = $('a[href^="' + href + '"]').parent('li.chapter'),
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m = items.length;
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if (m === 0) {
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items = summary.find('li.chapter');
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m = items.length;
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}
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if (m === 0) return;
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// all section titles on current page
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var hs = bookInner.find('.page-inner').find('h1,h2,h3'), n = hs.length,
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ts = hs.map(function(i, el) { return $(el).text(); });
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if (n === 0) return;
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var scrollHandler = function(e) {
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var ht = $(window).height();
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clearTimeout($.data(this, 'scrollTimer'));
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$.data(this, 'scrollTimer', setTimeout(function() {
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// find the first visible title in the viewport
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for (var i = 0; i < n; i++) {
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var rect = hs[i].getBoundingClientRect();
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if (rect.top >= 0 && rect.bottom <= ht) break;
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}
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if (i === n) return;
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items.removeClass('active');
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for (var j = 0; j < m; j++) {
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if (items.eq(j).children('a').first().text() === ts[i]) break;
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}
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if (j === m) j = 0; // highlight the chapter title
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// search bottom-up for a visible TOC item to highlight; if an item is
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// hidden, we check if its parent is visible, and so on
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while (j > 0 && items.eq(j).is(':hidden')) j--;
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items.eq(j).addClass('active');
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}, 250));
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};
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bookInner.on('scroll.bookdown', scrollHandler);
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bookBody.on('scroll.bookdown', scrollHandler);
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})();
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// do not refresh the page if the TOC item points to the current page
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$('a[href="' + href + '"]').parent('li.chapter').children('a')
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.on('click', function(e) {
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bookInner.scrollTop(0);
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bookBody.scrollTop(0);
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return false;
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});
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var toolbar = config.toolbar;
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if (!toolbar || toolbar.position !== 'static') {
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var bookHeader = $('.book-header');
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bookBody.addClass('fixed');
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bookHeader.addClass('fixed')
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.css('background-color', bookBody.css('background-color'))
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.on('click.bookdown', function(e) {
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// the theme may have changed after user clicks the theme button
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bookHeader.css('background-color', bookBody.css('background-color'));
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});
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}
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});
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gitbook.events.bind("page.change", function(e) {
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// store TOC scroll position
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var summary = $('ul.summary');
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gs.set('tocScrollTop', summary.scrollTop());
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});
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var bookBody = $('.book-body'), bookInner = bookBody.find('.body-inner');
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var chapterTitle = function() {
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return bookInner.find('.page-inner').find('h1,h2').first().text();
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};
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var bookTitle = function() {
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return bookInner.find('.book-header > h1').first().text();
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};
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var saveScrollPos = function(e) {
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// save scroll position before page is reloaded
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gs.set('bodyScrollTop', {
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body: bookBody.scrollTop(),
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inner: bookInner.scrollTop(),
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focused: document.hasFocus(),
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title: chapterTitle()
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});
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};
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$(document).on('servr:reload', saveScrollPos);
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// check if the page is loaded in an iframe (e.g. the RStudio preview window)
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var inIFrame = function() {
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var inIframe = true;
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try { inIframe = window.self !== window.top; } catch (e) {}
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return inIframe;
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};
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$(window).on('blur unload', function(e) {
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if (inIFrame()) saveScrollPos(e);
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gs.set('bookTitle', bookTitle());
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});
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$(function(e) {
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if (gs.get('bookTitle', '') !== bookTitle()) localStorage.clear();
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var pos = gs.get('bodyScrollTop');
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if (pos) {
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if (pos.title === chapterTitle()) {
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if (pos.body !== 0) bookBody.scrollTop(pos.body);
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if (pos.inner !== 0) bookInner.scrollTop(pos.inner);
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}
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if (pos.focused) bookInner.find('.page-wrapper').focus();
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}
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// clear book body scroll position
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gs.remove('bodyScrollTop');
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});
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});
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