/*** Highlight unreferenced passages ***/
(function(){
// finds passages that lack references and marks them
function markUnreferencedPassages(){
// stylesheet to color passages lacking references
function addStylesheet(){
const stylesheet = document.createElement('style');
stylesheet.innerHTML = `
.has-no-references, .Template-Fact {
background: LightPink;
}
`;
document.head.appendChild(stylesheet);
}
// check whether references are relevant to the element
function isEligible(element, excludedSections){
// exclude elements that are part of navboxes, sidebars, and the like
// references do not matter for them
if(hasParentClass(element, 'navbox')
|| hasParentClass(element, 'sidebar')
|| hasParentClass(element, 'infobox')
|| hasParentClass(element, 'side-box-flex')
|| hasParentClass(element, 'noprint')
|| hasParentClass(element, 'refbegin')
|| hasParentClass(element, 'gallery')
|| hasParentClass(element, 'toc')
|| hasParentClass(element, 'reflist')){
return false;
}
// exclude elements that belong to certain sections where references do not matter
const sectionName = getSectionName(element);
if(excludedSections.indexOf(sectionName) != -1){
return false;
}
return true;
}
// utility function to check whether the elements parents and grand parents have a certain class
function hasParentClass(element, className){
return element.closest('.' + className) != null;
}
// utility function to get the section name to which an element belongs
function getSectionName(element){
var mainContainerChildElement = getGrandchildOfMainContainer(element);
var sectionName = ''; // default section name, this corresponds to the lead
var previousElement = mainContainerChildElement.previousElementSibling;
// sections always start with an h2 element
// the script loops back from an element to the previous element until an h2 element is discovered
while(previousElement != null){
// check whether it is an h2 element
if(previousElement.tagName == 'H2'){
// extract the section name
sectionName = previousElement.innerText.split('[edit]').join('');
break;
}
previousElement = previousElement.previousElementSibling;
}
return sectionName;
}
// utility function: for any element, return the parent that is a grandchild of the main container
function getGrandchildOfMainContainer(element){
const mainContainer = document.getElementById('mw-content-text');
if(element.parentElement.parentElement == mainContainer){
return element;
}
else{
return getGrandchildOfMainContainer(element.parentElement);
}
}
// utility function to check whether the lead section of the article should be marked
function shouldMarkLead(){
// if it is a draft then the lead should be highlighted
var pageTitleNamespace = document.getElementsByClassName('mw-page-title-namespace')[0];
if(pageTitleNamespace != null){
if(pageTitleNamespace.innerText === 'User' || pageTitleNamespace.innerText === 'Draft'){
return true;
}
}
// if it is a stub then the lead should be highlighted
else if(document.getElementsByClassName('stub').length > 0){
return true;
}
// otherwise not
else {
return false;
}
}
// marks elements that lack references
function mark(element){
// mark elements without any reference elements
if(element.getElementsByClassName('reference').length == 0){
element.classList.add("has-no-references");
}
// mark elements with some reference elements
else{
// if the last element is not a reference then start marking it
markUntilPreviousReference(element.lastChild);
// starts from each "citation needed" tag, goes backwards and marks until it reaches a reference
var citationNeededTags = element.getElementsByClassName('Template-Fact');
for(var citationNeededTag of citationNeededTags){
markUntilPreviousReference(citationNeededTag);
}
}
}
// Function to mark unreferenced passages. It starts with one node and loops back to previous nodes until it hits a reference
function markUntilPreviousReference(childNode){
var currentNode = childNode;
while(currentNode != null){
// handle nodes that are not HTML elements
if(currentNode.classList == null){
// create a span element and classify it
var span = document.createElement('span');
span.classList.add("has-no-references");
// copy the node's text into the span element and replace the node with the span element
span.innerHTML = currentNode.data;
currentNode.parentElement.replaceChild(span, currentNode);
currentNode = span;
}
// handle nodes that are HTML elements
// if the node is a reference
else if(currentNode.classList.contains('reference')){
// check whether the node is an actual reference: they contain numbers
if(currentNode != null &&
currentNode.innerText != null &&
/[0-9]/.test(currentNode.innerText) &&
!currentNode.innerText.toLowerCase().includes('note') &&
!currentNode.innerText.toLowerCase().includes('nb')){
break;
}
// otherwise it is an explanatory footnote and not a reference
else{
currentNode.classList.add('has-no-references');
}
}
// if the node is an element but not a reference then classify it
else {
currentNode.classList.add('has-no-references');
}
// set the current node to the previous one to continue the loop
currentNode = currentNode.previousSibling;
}
}
// removes the red background from elements that were falsely highlighted
function excludeFalsePositives(){
// exclude references used in nested lists
var unreferencedElements = document.getElementsByClassName('has-no-references');
for(let unreferencedElement of unreferencedElements){
// if the element contains a reference inside then it is not unreferenced, so remove the class
if(unreferencedElement.getElementsByClassName('reference').length > 0){
unreferencedElement.classList.remove('has-no-references');
}
}
// exclude quoteboxes
unreferencedElements = document.getElementsByClassName('has-no-references');
for(let unreferencedElement of unreferencedElements){
// see if the the element is part of a quotebox that has a citation
var quoteboxParent = unreferencedElement.closest('.quotebox');
if(quoteboxParent != null && quoteboxParent.getElementsByTagName('cite').length > 0){
unreferencedElement.classList.remove('has-no-references');
}
}
// do not mark empty elements
unreferencedElements = document.getElementsByClassName('has-no-references');
for(let unreferencedElement of unreferencedElements){
if(unreferencedElement.innerHTML == "\n" || unreferencedElement.innerHTML == " \n"){
unreferencedElement.classList.remove('has-no-references');
}
}
// exclude the template {{rp}}
var referenceElements = document.getElementsByClassName('reference');
for(let referenceElement of referenceElements){
if(referenceElement.classList.contains('has-no-references')){
referenceElement.classList.remove('has-no-references');
}
}
// blockquotes often use a different reference style, so false positives need to be excluded separately
const unreferencedParagraphsInsideBlockquotes = document.querySelectorAll('blockquote > p.has-no-references');
for(var unreferencedParagraphInsideBlockquotes of unreferencedParagraphsInsideBlockquotes){
const parent = unreferencedParagraphInsideBlockquotes.parentElement;
// check whether the parent blockquote contains a citation element
if(parent.getElementsByClassName('templatequotecite').length > 0){
// if it does then the paragraph is not unreferenced
unreferencedParagraphInsideBlockquotes.classList.remove('has-no-references');
}
}
// ignore elements in the template "ombox"
let unreferencedElementsInOmboxes = document.querySelectorAll(".ombox .has-no-references");
for (let element of unreferencedElementsInOmboxes) {
element.classList.remove("has-no-references");
}
// for drafts: exclude comments
var pageTitleNamespace = document.getElementsByClassName('mw-page-title-namespace')[0];
if(pageTitleNamespace != null){
if(pageTitleNamespace.innerText === 'User' || pageTitleNamespace.innerText === 'Draft'){
let unreferencedComments = document.querySelectorAll(".has-no-references:has(.localcomments)");
for (let unreferencedComment of unreferencedComments) {
unreferencedComment.classList.remove("has-no-references");
}
}
}
}
addStylesheet();
// all paragraphs and list entries should have references
const paragraphs = document.getElementById('mw-content-text').getElementsByTagName('p');
const listEntries = document.getElementById('mw-content-text').getElementsByTagName('li');
const elements = Array.from(paragraphs).concat(Array.from(listEntries));
// these sections are not checked for references
var excludedSections = ['Plot', 'Plots', 'Plot summary', 'Plot synopsis', 'Synopsis', 'Storylines', 'Further reading', 'See also', 'External links', 'References', 'Bibliography', 'Notes', 'Selected publications', 'Selected works', 'Cited sources', 'Sources', 'Footnotes'];
// dedice whether the lead should be checked for references
if(!shouldMarkLead()){
excludedSections.push('');
}
for(var element of elements){
// check whether the element should be excluded
if(isEligible(element, excludedSections)){
// mark the element if it lacks references
mark(element);
}
}
excludeFalsePositives();
}
// restrict script to mainspace, userspace, and draftspace
var namespaceNumber = mw.config.get('wgNamespaceNumber');
if (namespaceNumber === 0 || namespaceNumber === 2 || namespaceNumber === 118) {
// add a link to the toolbox
$.when(mw.loader.using('mediawiki.util'), $.ready).then(function (){
var portletlink = mw.util.addPortletLink('p-tb', '#', 'Highlight unreferenced passages');
// run the main function when the link is clicked
portletlink.onclick = function(e) {
e.preventDefault();
markUnreferencedPassages();
const unreferencedElements = document.getElementsByClassName('has-no-references');
//mw.notify(`${unreferencedElements.length} elements were highlighted`);
mw.notify('Highlighting finished.');
};
});
}
if (namespaceNumber === 0 || namespaceNumber === 118) {
if(typeof highlightUnreferencedPassagesAutomatic != 'undefined' && highlightUnreferencedPassagesAutomatic == true){
markUnreferencedPassages();
}
}
})();
