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MediaWiki:Gadget-SidebarTOC.js
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$(function(){
if (!$('#toc').length) {
return;
}
var i18n = {
header: 'Contents',
top: '(Top)'
};
// Remove the logic for collapsing and expanding the TOC
$('<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)
),
$('<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()
)
)
).appendTo('#mw-panel');
// Remove the original TOC on the page
$('#toc').remove();
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');
if ( tocSection.is(':hidden') && index > 0 ) return onIntersection(allSections[index - 1]);
var tocSectionPos = tocSection[0].offsetTop - baseOffset;
if ( tocSectionPos < tocList.scrollTop + (tocList.clientHeight * 0.15) ) {
tocList.scrollTo({top: tocSectionPos - (tocList.clientHeight * 0.3)});
}
else if ( tocSectionPos > tocList.scrollTop + (tocList.clientHeight * 0.85) ) {
tocList.scrollTo({top: tocSectionPos - (tocList.clientHeight * 0.7)});
}
}
} );
})