105 lines
2.9 KiB
JavaScript
105 lines
2.9 KiB
JavaScript
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// ------------------ TABLE OF CONTENTS --------------
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class toc extends Paged.Handler {
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constructor(chunker, polisher, caller) {
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super(chunker, polisher, caller);
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}
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beforeParsed(content){
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const toc = content.querySelector('#table-of-contents');
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let elements = ['.chapter h2'];
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createToc({
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content: content,
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container: '#table-of-contents',
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titleElements: elements,
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});
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}
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}
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Paged.registerHandlers(toc);
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function createToc(config) {
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const content = config.content;
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const tocElement = config.container;
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const titleElements = config.titleElements;
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let tocElementDiv = content.querySelector(tocElement)
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if(!tocElementDiv) return console.warn('couldn’t start the toc')
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tocElementDiv.innerHTML = ''
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let tocUl = document.createElement('ul')
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tocUl.id = 'list-toc-generated'
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if(config.before){
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tocUl.style.setProperty('--before-page', '"' + config.before + '"');
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}
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tocElementDiv.appendChild(tocUl)
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// add class to all title elements
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let tocElementNbr = 0
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for (var i = 0; i < titleElements.length; i++) {
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let titleHierarchy = i + 1
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let titleElement = content.querySelectorAll(titleElements[i])
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titleElement.forEach(function (element) {
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// check if shouldbe shown
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if (
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!element.classList.contains('toc-ignore') ||
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!element.classList.contains('toc-ignore')
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) {
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// add classes to the element
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element.classList.add('title-element')
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element.setAttribute('data-title-level', titleHierarchy)
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// add an id if doesn't exist
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tocElementNbr++
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if (element.id == '') {
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element.id = 'title-element-' + tocElementNbr
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}
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let newIdElement = element.id
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}
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})
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}
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// create toc list
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let tocElements = content.querySelectorAll('.title-element')
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for (var i = 0; i < tocElements.length; i++) {
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let tocElement = tocElements[i]
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let tocNewLi = document.createElement('li')
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// Add class for the hierarcy of toc
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tocNewLi.classList.add('toc-element')
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tocNewLi.classList.add('toc-element-level-' + tocElement.dataset.titleLevel)
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let classes = [
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...(tocElement.className ? tocElement.className.split(' ') : []),
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...(tocElement.closest('section')?.className ? tocElement.closest('section')?.className.split(' ') : []),
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];
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classes.forEach((meta) => {
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if (!meta || meta === 'title-element') return;
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tocNewLi.classList.add(`toc-${meta}`);
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});
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//get the exisiting class
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// Keep class of title elements
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let classTocElement = tocElement.classList
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for (var n = 0; n < classTocElement.length; n++) {
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if (classTocElement[n] != 'title-element') {
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tocNewLi.classList.add(classTocElement[n])
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}
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}
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tocNewLi.innerHTML =
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'<a class="toc-link" href="#' + tocElement.id + '">' + tocElement.innerHTML + '</a>';
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tocUl.appendChild(tocNewLi)
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}
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}
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