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123 lines
No EOL
3.8 KiB
JavaScript
123 lines
No EOL
3.8 KiB
JavaScript
/*
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Javascript functions to help make the print page more PDF friendly
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*/
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/*
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Generates a table of contents for the print site page.
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Only called when print-site-plugin option 'add_table_of_contents' is set to true
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*/
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function generate_toc() {
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var ToC = ""
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var newLine, el, title, link;
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const toc_elements = document.querySelectorAll(
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"#print-site-page h1.nav-section-title, #print-site-page h1.nav-section-title-end," +
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"#print-site-page h2.nav-section-title, #print-site-page h2.nav-section-title-end," +
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"#print-site-page h3.nav-section-title, #print-site-page h3.nav-section-title-end," +
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"#print-site-page h4.nav-section-title, #print-site-page h4.nav-section-title-end," +
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"#print-site-page h5.nav-section-title, #print-site-page h5.nav-section-title-end," +
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"#print-site-page h6.nav-section-title, #print-site-page h6.nav-section-title-end," +
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"section.print-page h1,section.print-page h2,section.print-page h3," +
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"section.print-page h4,section.print-page h5,section.print-page h6")
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var current_heading_depth = 0;
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var current_section_depth = 0;
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// Extract table of contents depth
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// basically plugin setting, passed via a data attribute
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var toc_depth = document.getElementById("print-page-toc").getAttribute("data-toc-depth")
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for (var i = 0; i < toc_elements.length; i++) {
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// Get the info from the element
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el = toc_elements[i]
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link = "#" + el.id;
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tag = el.tagName
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tag_level = tag.substring(1)
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// Get the text of a heading
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// We use .firstChild.nodeValue instead of .innerText
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// because of elements like:
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// <h1 id="index-mkdocs-print-site-plugin">
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// mkdocs-print-site-plugin<a class="headerlink" href="#index-mkdocs-print-site-plugin" title="Permanent link">↵</a>
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// </h1>
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title = el.firstChild.nodeValue;
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if ( ! title ) {
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continue;
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}
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// Don't put the toc h1 in the toc
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if ( el.classList.contains('print-page-toc-title') ) {
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continue;
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}
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// Ignore the MkDocs keyboard Model
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if ( el.id.indexOf("keyboardModalLabel") > -1 ) {
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continue;
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}
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// print-site-plugin has a setting to control TOC depth
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if ( tag_level > toc_depth ) {
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continue;
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}
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if (el.classList.contains('nav-section-title') ) {
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// Use the tag level of the first item in the section to close off any nested <ul>
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el = toc_elements[i+1]
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link = "#" + el.id;
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tag = el.tagName
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tag_level = tag.substring(1)
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while (tag_level > current_heading_depth) {
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current_heading_depth++;
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ToC += "<ul class='print-site-toc-level-" + current_heading_depth + "'>";
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}
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while (tag_level < current_heading_depth) {
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current_heading_depth--;
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ToC += "</ul>";
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}
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// Insert a section heading <li> item, however deeply we are nested.
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current_section_depth++;
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// Insert item as a section title in the current list
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ToC += "<li class='toc-nav-section-title toc-nav-section-title-level-" + (current_section_depth) + "'>" + title + "</li>";
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// Start a new ul for the section
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ToC += "<ul class='print-site-toc-level-" + current_heading_depth + " toc-section-line-border'>";
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continue;
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}
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if (el.classList.contains('nav-section-title-end') ) {
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current_section_depth--;
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// Close the special section ul
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ToC += "</ul>";
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continue;
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}
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while (tag_level > current_heading_depth) {
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current_heading_depth++;
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ToC += "<ul class='print-site-toc-level-" + current_heading_depth + "'>";
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}
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while (tag_level < current_heading_depth) {
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current_heading_depth--;
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ToC += "</ul>";
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}
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newLine = "<li>" +
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"<a href='" + link + "'>" +
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title +
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"</a>" +
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"</li>";
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ToC += newLine;
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};
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ToC += "</ul>"
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document.querySelectorAll("#print-page-toc nav")[0].insertAdjacentHTML("beforeend", ToC);
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} |