MediaWiki:Gadget-StickyToC.js
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$(function(){
if (!$('#toc').length) {
return;
}
var i18n = {
header: 'Contents',
top: '(Top)'
};
function adjustPanelHeight() {
$('#mw-panel').css('height', 'auto');
var panelHeight = document.body.scrollHeight - 10;
if (panelHeight > window.innerHeight) {
panelHeight = window.innerHeight - 10;
}
$('#mw-panel').css('height', panelHeight);
}
new ResizeObserver(function(entries) {
adjustPanelHeight();
}).observe($('#content')[0]);
$(window).resize(adjustPanelHeight); // Adjust on window resize as well
var tocCollapsed = (localStorage.getItem("sidebar_vector_c_p-toc") === "y");
$('<nav id="p-toc" class="vector-menu mw-portlet mw-portlet-toc vector-menu-portal portal" aria-labelledby="p-toc-label" role="navigation">').append(
$('<h3 id="p-toc-label" class="vector-menu-heading" tabindex="0">').append(
$('<span class="vector-menu-heading-label">').text(i18n.header)
).on("keypress", function(event) {
if (event.which == 13) {
$(this).trigger("click");
event.stopImmediatePropagation();
}
}).on("click", function(event) {
var $el = $(this).parent();
event.stopPropagation();
$el.toggleClass("collapsed");
if ($el.hasClass("collapsed")) {
localStorage.setItem("sidebar_vector_c_p-toc", "y");
$el.find(".vector-menu-content").slideUp("fast");
$el.css({'margin-right': '', 'margin-left': ''});
} else {
localStorage.setItem("sidebar_vector_c_p-toc", "n");
$el.find(".vector-menu-content").slideDown("fast");
var $toc = $el.find(".vector-menu-content-list")[0];
if ($toc.clientWidth < $toc.scrollWidth) {
$el.css({'margin-right': '0', 'margin-left': '0'});
}
if (window.innerWidth >= 982 && $toc.clientWidth < $toc.scrollWidth) {
$el.css({'margin-right': '-0.5em', 'margin-left': '-0.5em'});
}
}
adjustPanelHeight(); // Adjust height after toggling
}),
$('<div class="vector-menu-content">').append(
$('<ul class="vector-menu-content-list">').append(
$('<li class="toclevel-1 tocsection-0">').append($('<a href="#">').append(
$('<span class="toctext">').text(i18n.top)
)),
$('#toc > ul').children().clone()
)
).addClass($('#toc').parent().prop('class').split(/\s+/).filter(function(classname) {
return classname.startsWith('toc-');
}).join(' ')).css('display', tocCollapsed ? 'none' : '')
).addClass(tocCollapsed ? 'collapsed' : '').appendTo('#mw-panel');
mw.loader.using(['ext.gadget.sectionObserver'], function(require) {
var initSectionObserver = require('ext.gadget.sectionObserver');
var allSections = document.querySelectorAll('#firstHeading, .mw-headline');
var sectionObserver = initSectionObserver({topMargin: 20, onIntersection: onIntersection});
sectionObserver.setElements(allSections);
sectionObserver.calcIntersection();
allSections = Array.from(allSections);
var tocList = $('#p-toc .vector-menu-content-list')[0];
var tocSections = $('#p-toc .vector-menu-content-list li');
var baseOffset = $('#p-toc .tocsection-0 .toctext')[0].offsetTop;
function onIntersection(section) {
var index = allSections.indexOf(section);
$('#p-toc .tocsection-current').removeClass('tocsection-current');
var tocSection = tocSections.eq(index).addClass('tocsection-current');
var tocItemOffsetTop = tocSection[0].offsetTop - tocList.offsetTop;
var tocItemHeight = tocSection.outerHeight();
if (tocItemOffsetTop < tocList.scrollTop) {
tocList.scrollTop = tocItemOffsetTop - tocItemHeight;
} else if (tocItemOffsetTop + tocItemHeight > tocList.scrollTop + tocList.clientHeight) {
tocList.scrollTop = tocItemOffsetTop + tocItemHeight - tocList.clientHeight;
}
}
});
adjustPanelHeight(); // Initial adjustment
});