hugo-theme-relearn/js/relearn.js
2021-11-13 13:12:16 +00:00

616 lines
21 KiB
JavaScript

// Scrollbar Width function
function getScrollBarWidth() {
var inner = document.createElement('p');
inner.style.width = "100%";
inner.style.height = "200px";
var outer = document.createElement('div');
outer.style.position = "absolute";
outer.style.top = "0px";
outer.style.left = "0px";
outer.style.visibility = "hidden";
outer.style.width = "200px";
outer.style.height = "150px";
outer.style.overflow = "hidden";
outer.appendChild(inner);
document.body.appendChild(outer);
var w1 = inner.offsetWidth;
outer.style.overflow = 'scroll';
var w2 = inner.offsetWidth;
if (w1 == w2) w2 = outer.clientWidth;
document.body.removeChild(outer);
return (w1 - w2);
};
function setMenuHeight() {
$('#sidebar .highlightable').height($('#sidebar').innerHeight() - $('#header-wrapper').height() - 40);
$('#sidebar .highlightable').perfectScrollbar('update');
}
function fallbackMessage(action) {
var actionMsg = '';
var actionKey = (action === 'cut' ? 'X' : 'C');
if (/iPhone|iPad/i.test(navigator.userAgent)) {
actionMsg = 'No support :(';
}
else if (/Mac/i.test(navigator.userAgent)) {
actionMsg = 'Press ⌘-' + actionKey + ' to ' + action;
}
else {
actionMsg = 'Press Ctrl-' + actionKey + ' to ' + action;
}
return actionMsg;
}
function switchTab(tabGroup, tabId) {
allTabItems = jQuery("[data-tab-group='"+tabGroup+"']");
targetTabItems = jQuery("[data-tab-group='"+tabGroup+"'][data-tab-item='"+tabId+"']");
// if event is undefined then switchTab was called from restoreTabSelection
// so it's not a button event and we don't need to safe the selction or
// prevent page jump
var isButtonEvent = event != undefined;
if(isButtonEvent){
// save button position relative to viewport
var yposButton = event.target.getBoundingClientRect().top;
}
allTabItems.removeClass("active");
targetTabItems.addClass("active");
if(isButtonEvent){
// reset screen to the same position relative to clicked button to prevent page jump
var yposButtonDiff = event.target.getBoundingClientRect().top - yposButton;
window.scrollTo(window.scrollX, window.scrollY+yposButtonDiff);
// Store the selection to make it persistent
if(window.localStorage){
var selectionsJSON = window.localStorage.getItem("tabSelections");
if(selectionsJSON){
var tabSelections = JSON.parse(selectionsJSON);
}else{
var tabSelections = {};
}
tabSelections[tabGroup] = tabId;
window.localStorage.setItem("tabSelections", JSON.stringify(tabSelections));
}
}
}
function restoreTabSelections() {
if(window.localStorage){
var selectionsJSON = window.localStorage.getItem("tabSelections");
if(selectionsJSON){
var tabSelections = JSON.parse(selectionsJSON);
}else{
var tabSelections = {};
}
Object.keys(tabSelections).forEach(function(tabGroup) {
var tabItem = tabSelections[tabGroup];
switchTab(tabGroup, tabItem);
});
}
}
function initMermaid() {
$('code.language-mermaid').each(function(index, element) {
var content = $(element).html().replace(/&/g, '&');
$(element).parent().replaceWith('<div class="mermaid" align="center">' + content + '</div>');
});
if (typeof mermaid != 'undefined' && typeof mermaid.mermaidAPI != 'undefined') {
mermaid.mermaidAPI.initialize( Object.assign( {}, mermaid.mermaidAPI.getSiteConfig(), { startOnLoad: true } ) );
mermaid.contentLoaded();
$(".mermaid svg").svgPanZoom({});
}
}
function scrollToActiveMenu() {
window.setTimeout(function(){
var e = $("#sidebar ul.topics li.active a")[0];
if( e && e.scrollIntoView ){
e.scrollIntoView({
block: 'center',
});
}
}, 200);
}
// Get Parameters from some url
var getUrlParameter = function getUrlParameter(sPageURL) {
var url = sPageURL.split('?');
var obj = {};
if (url.length == 2) {
var sURLVariables = url[1].split('&'),
sParameterName,
i;
for (i = 0; i < sURLVariables.length; i++) {
sParameterName = sURLVariables[i].split('=');
obj[sParameterName[0]] = sParameterName[1];
}
}
return obj;
};
// Execute actions on images generated from Markdown pages
var images = $("main#body-inner img").not(".inline");
// Wrap image inside a featherlight (to get a full size view in a popup)
images.wrap(function(){
var image =$(this);
var o = getUrlParameter(image[0].src);
var f = o['featherlight'];
// IF featherlight is false, do not use feather light
if (f != 'false') {
if (!image.parent("a").length) {
var html = $( "<a>" ).attr("href", image[0].src).attr("data-featherlight", "image").get(0).outerHTML;
return html;
}
}
});
// Change styles, depending on parameters set to the image
images.each(function(index){
var image = $(this)
var o = getUrlParameter(image[0].src);
if (typeof o !== "undefined") {
var h = o["height"];
var w = o["width"];
var c = o["classes"];
image.css("width", function() {
if (typeof w !== "undefined") {
return w;
} else {
return "auto";
}
});
image.css("height", function() {
if (typeof h !== "undefined") {
return h;
} else {
return "auto";
}
});
if (typeof c !== "undefined") {
var classes = c.split(',');
for (i = 0; i < classes.length; i++) {
image.addClass(classes[i]);
}
}
}
});
// for the window resize
$(window).resize(function() {
setMenuHeight();
});
// for the sticky header
$(window).scroll(function() {
// add shadow when not in top position
if ($(this).scrollTop() == 0) {
$('#top-bar').removeClass("is-sticky");
}
else {
$('#top-bar').addClass("is-sticky");
}
});
// debouncing function from John Hann
// http://unscriptable.com/index.php/2009/03/20/debouncing-javascript-methods/
(function($, sr) {
var debounce = function(func, threshold, execAsap) {
var timeout;
return function debounced() {
var obj = this, args = arguments;
function delayed() {
if (!execAsap)
func.apply(obj, args);
timeout = null;
};
if (timeout)
clearTimeout(timeout);
else if (execAsap)
func.apply(obj, args);
timeout = setTimeout(delayed, threshold || 100);
};
}
// smartresize
jQuery.fn[sr] = function(fn) { return fn ? this.bind('resize', debounce(fn)) : this.trigger(sr); };
})(jQuery, 'smartresize');
jQuery(function() {
restoreTabSelections();
initMermaid();
scrollToActiveMenu();
jQuery('#sidebar .category-icon').on('click', function() {
$( this ).toggleClass("fa-angle-down fa-angle-right") ;
$( this ).parent().parent().children('ul').toggle() ;
return false;
});
var sidebarStatus = searchStatus = 'open';
$('#sidebar .highlightable').perfectScrollbar();
setMenuHeight();
jQuery('#overlay').on('click', function() {
jQuery(document.body).toggleClass('sidebar-hidden');
sidebarStatus = (jQuery(document.body).hasClass('sidebar-hidden') ? 'closed' : 'open');
return false;
});
jQuery('[data-sidebar-toggle]').on('click', function() {
jQuery(document.body).toggleClass('sidebar-hidden');
sidebarStatus = (jQuery(document.body).hasClass('sidebar-hidden') ? 'closed' : 'open');
return false;
});
jQuery('[data-clear-history-toggle]').on('click', function() {
sessionStorage.clear();
location.reload();
return false;
});
jQuery('[data-search-toggle]').on('click', function() {
if (sidebarStatus == 'closed') {
jQuery('[data-sidebar-toggle]').trigger('click');
jQuery(document.body).removeClass('searchbox-hidden');
searchStatus = 'open';
return false;
}
jQuery(document.body).toggleClass('searchbox-hidden');
searchStatus = (jQuery(document.body).hasClass('searchbox-hidden') ? 'closed' : 'open');
return false;
});
var ajax;
jQuery('[data-search-input]').on('input', function() {
var input = jQuery(this),
value = input.val(),
items = jQuery('[data-nav-id]');
items.removeClass('search-match');
if (!value.length) {
$('ul.topics').removeClass('searched');
items.css('display', 'block');
sessionStorage.removeItem('search-value');
$("mark").parents(".expand-marked").removeClass("expand-marked");
$(".highlightable").unhighlight({ element: 'mark' })
return;
}
sessionStorage.setItem('search-value', value);
$("mark").parents(".expand-marked").removeClass("expand-marked");
$(".highlightable").unhighlight({ element: 'mark' }).highlight(value, { element: 'mark' });
$("mark").parents(".expand").addClass("expand-marked");
if (ajax && ajax.abort) ajax.abort();
jQuery('[data-search-clear]').on('click', function() {
jQuery('[data-search-input]').val('').trigger('input');
sessionStorage.removeItem('search-input');
$("mark").parents(".expand-marked").removeClass("expand-marked");
$(".highlightable").unhighlight({ element: 'mark' })
});
});
$.expr[":"].contains = $.expr.createPseudo(function(arg) {
return function( elem ) {
return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
};
});
if (sessionStorage.getItem('search-value')) {
var searchValue = sessionStorage.getItem('search-value')
$(document.body).removeClass('searchbox-hidden');
$('[data-search-input]').val(searchValue);
$('[data-search-input]').trigger('input');
var searchedElem = $('#body-inner').find(':contains(' + searchValue + ')').get(0);
if (searchedElem) {
searchedElem.scrollIntoView(true);
var scrolledY = window.scrollY;
if(scrolledY){
window.scroll(0, scrolledY - 125);
}
}
}
$(".highlightable").highlight(sessionStorage.getItem('search-value'), { element: 'mark' });
$("mark").parents(".expand").addClass("expand-marked");
// clipboard
var clipInit = false;
$('code').each(function() {
var code = $(this),
text = code.text();
if (text.length > 5) {
if (!clipInit) {
var text, clip = new ClipboardJS('.copy-to-clipboard', {
text: function(trigger) {
text = $(trigger).prev('code').text();
return text.replace(/^\$\s/gm, '');
}
});
var inPre;
clip.on('success', function(e) {
e.clearSelection();
inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
$(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
});
clip.on('error', function(e) {
inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
$(e.trigger).attr('aria-label', fallbackMessage(e.action)).addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
$(document).one('copy', function(){
$(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
});
});
clipInit = true;
}
code.addClass('copy-to-clipboard-inline');
code.after('<span class="copy-to-clipboard" title="Copy to clipboard" />');
code.next('.copy-to-clipboard').on('mouseleave', function() {
$(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
});
}
});
// allow keyboard control for prev/next links
jQuery(function() {
jQuery('.nav-prev').click(function(){
location.href = jQuery(this).attr('href');
});
jQuery('.nav-next').click(function() {
location.href = jQuery(this).attr('href');
});
});
jQuery('input, textarea').keydown(function (e) {
// left and right arrow keys
if (e.which == '37' || e.which == '39') {
e.stopPropagation();
}
});
jQuery(document).keydown(function(e) {
// prev links - left arrow key
if(e.which == '37') {
jQuery('.nav.nav-prev').click();
}
// next links - right arrow key
if(e.which == '39') {
jQuery('.nav.nav-next').click();
}
});
$('#top-bar a:not(:has(img)):not(.btn)').addClass('highlight');
$('#body-inner a:not(:has(img)):not(.btn):not(a[rel="footnote"])').addClass('highlight');
var touchsupport = ('ontouchstart' in window) || (navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0)
if (!touchsupport){ // browser doesn't support touch
$('#toc-menu').hover(function() {
$('.progress').stop(true, false, true).fadeToggle(100);
});
$('.progress').hover(function() {
$('.progress').stop(true, false, true).fadeToggle(100);
});
}
if (touchsupport){ // browser does support touch
$('#toc-menu').click(function() {
$('.progress').stop(true, false, true).fadeToggle(100);
});
$('.progress').click(function() {
$('.progress').stop(true, false, true).fadeToggle(100);
});
}
/**
* Fix anchor scrolling that hides behind top nav bar
* Courtesy of https://stackoverflow.com/a/13067009/28106
*
* We could use pure css for this if only heading anchors were
* involved, but this works for any anchor, including footnotes
**/
(function (document, history, location) {
var HISTORY_SUPPORT = !!(history && history.pushState);
var anchorScrolls = {
ANCHOR_REGEX: /^#[^ ]+$/,
OFFSET_HEIGHT_PX: 50,
/**
* Establish events, and fix initial scroll position if a hash is provided.
*/
init: function () {
this.scrollToCurrent();
$(window).on('hashchange', $.proxy(this, 'scrollToCurrent'));
$('body').on('click', 'a', $.proxy(this, 'delegateAnchors'));
},
/**
* Return the offset amount to deduct from the normal scroll position.
* Modify as appropriate to allow for dynamic calculations
*/
getFixedOffset: function () {
return this.OFFSET_HEIGHT_PX;
},
/**
* If the provided href is an anchor which resolves to an element on the
* page, scroll to it.
* @param {String} href
* @return {Boolean} - Was the href an anchor.
*/
scrollIfAnchor: function (href, pushToHistory) {
var match, anchorOffset;
if (!this.ANCHOR_REGEX.test(href)) {
return false;
}
match = document.getElementById(href.slice(1));
if (match) {
anchorOffset = $(match).offset().top - this.getFixedOffset();
$('html, body').animate({ scrollTop: anchorOffset });
// Add the state to history as-per normal anchor links
if (HISTORY_SUPPORT && pushToHistory) {
history.pushState({}, document.title, location.pathname + href);
}
}
return !!match;
},
/**
* Attempt to scroll to the current location's hash.
*/
scrollToCurrent: function (e) {
if (this.scrollIfAnchor(window.location.hash) && e) {
e.preventDefault();
}
},
/**
* If the click event's target was an anchor, fix the scroll position.
*/
delegateAnchors: function (e) {
var elem = e.target;
if (this.scrollIfAnchor(elem.getAttribute('href'), true)) {
e.preventDefault();
}
}
};
$(document).ready($.proxy(anchorScrolls, 'init'));
})(window.document, window.history, window.location);
// Add link button for every
var text, clip = new ClipboardJS('.anchor');
$("h1~h2,h1~h3,h1~h4,h1~h5,h1~h6").append(function(index, html){
var element = $(this);
var url = encodeURI(document.location.origin + document.location.pathname);
var link = url + "#"+element[0].id;
var html = " " + $( "<span>" ).addClass("anchor").attr("data-clipboard-text", link).append("<i class='fas fa-link fa-lg'></i>").get(0).outerHTML;
return html;
});
$(".anchor").on('mouseleave', function(e) {
$(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
});
clip.on('success', function(e) {
e.clearSelection();
$(e.trigger).attr('aria-label', 'Link copied to clipboard!').addClass('tooltipped tooltipped-s');
});
$('a[rel="lightbox"]').featherlight({
root: 'div#body'
});
sessionStorage.setItem(jQuery('body').data('url'), 1);
// loop through the sessionStorage and see if something should be marked as visited
for (var url in sessionStorage) {
if (sessionStorage.getItem(url) == 1){
// in case we have `relativeURLs=true` we have to strip the
// relative path to root
url = url.replace( /\.\.\//g, '/' ).replace( /^\/+\//, '/' );
jQuery('[data-nav-id="' + url + '"]').addClass('visited');
}
}
});
jQuery.extend({
highlight: function(node, re, nodeName, className) {
if (node.nodeType === 3 && node.parentElement && node.parentElement.namespaceURI == 'http://www.w3.org/1999/xhtml') { // text nodes
var match = node.data.match(re);
if (match) {
var highlight = document.createElement(nodeName || 'span');
highlight.className = className || 'highlight';
var wordNode = node.splitText(match.index);
wordNode.splitText(match[0].length);
var wordClone = wordNode.cloneNode(true);
highlight.appendChild(wordClone);
wordNode.parentNode.replaceChild(highlight, wordNode);
return 1; //skip added node in parent
}
} else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
!/(script|style)/i.test(node.tagName) && // ignore script and style nodes
!(node.tagName === nodeName.toUpperCase() && node.className === className)) { // skip if already highlighted
for (var i = 0; i < node.childNodes.length; i++) {
i += jQuery.highlight(node.childNodes[i], re, nodeName, className);
}
}
return 0;
}
});
jQuery.fn.unhighlight = function(options) {
var settings = {
className: 'highlight',
element: 'span'
};
jQuery.extend(settings, options);
return this.find(settings.element + "." + settings.className).each(function() {
var parent = this.parentNode;
parent.replaceChild(this.firstChild, this);
parent.normalize();
}).end();
};
jQuery.fn.highlight = function(words, options) {
var settings = {
className: 'highlight',
element: 'span',
caseSensitive: false,
wordsOnly: false
};
jQuery.extend(settings, options);
if (!words) { return; }
if (words.constructor === String) {
words = [words];
}
words = jQuery.grep(words, function(word, i) {
return word != '';
});
words = jQuery.map(words, function(word, i) {
return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
});
if (words.length == 0) { return this; }
;
var flag = settings.caseSensitive ? "" : "i";
var pattern = "(" + words.join("|") + ")";
if (settings.wordsOnly) {
pattern = "\\b" + pattern + "\\b";
}
var re = new RegExp(pattern, flag);
return this.each(function() {
jQuery.highlight(this, re, settings.element, settings.className);
});
};