107 lines
3.0 KiB
JavaScript
107 lines
3.0 KiB
JavaScript
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var gitbook = window.gitbook;
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var options = {};
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gitbook.events.bind('start', function(e, config) {
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// Save config data
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options = config['page-toc-button'] || {};
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});
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gitbook.events.on('page.change', function() {
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// Default config values
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var _maxTocDepth = 2;
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var _minTocSize = 2;
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// Read out config data
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if (options)
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{
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_maxTocDepth = options.maxTocDepth ? options.maxTocDepth : _maxTocDepth;
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_minTocSize = options.minTocSize ? options.minTocSize : _minTocSize;
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};
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// Search for headers
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var headerArray = $(".book .body-inner .markdown-section :header");
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// Init variables
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var tocArray = [];
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var tocSize = 0;
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// For each header...
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for (i = 0; i < headerArray.length; i++) {
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var headerElement = headerArray[i];
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var header = $(headerElement);
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var headerId = header.attr("id");
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if ((typeof headerId !== typeof undefined) && (headerId !== false)) {
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switch(headerElement.tagName){
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case "H1":
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tocArray.push({
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name: header.text(),
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url: headerId,
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children: []
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});
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tocSize++;
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break;
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case "H2":
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if ((tocArray.length > 0) && (_maxTocDepth >= 1)) {
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tocArray[tocArray.length-1].children.push({
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name: header.text(),
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url: headerId,
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children: []
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});
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tocSize++;
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};
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break;
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case "H3":
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if ((tocArray.length > 0) && (_maxTocDepth >= 2)) {
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if (tocArray[tocArray.length-1].children.length > 0) {
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tocArray[tocArray.length-1].children[tocArray[tocArray.length-1].children.length-1].children.push({
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name: header.text(),
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url: headerId,
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children: []
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});
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tocSize++;
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};
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};
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break;
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default:
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break;
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}
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}
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};
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// Cancel if not enough headers to show
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if ((tocSize == 0) || (tocSize < _minTocSize)) {
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return;
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}
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// Generate html for button and menu
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var html = "<div class='page-toc-button'><i class='fa fa-bars' aria-hidden='true'></i><div class='page-toc-menu'><ul>";
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for (i = 0; i < tocArray.length; i++) {
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html += "<li><a href='#"+ tocArray[i].url + "'>" + tocArray[i].name + "</a></li>";
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if (tocArray[i].children.length > 0) {
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html += "<ul>"
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for (j = 0; j < tocArray[i].children.length; j++) {
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html += "<li><a href='#" + tocArray[i].children[j].url + "'>"+tocArray[i].children[j].name + "</a></li>";
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if (tocArray[i].children[j].children.length > 0) {
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html += "<ul>"
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for (k = 0; k < tocArray[i].children[j].children.length; k++) {
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html += "<li><a href='#" + tocArray[i].children[j].children[k].url + "'>"+tocArray[i].children[j].children[k].name + "</a></li>";
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}
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html += "</ul>"
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}
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}
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html += "</ul>"
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}
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}
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html += "</ul></div></div>";
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// Append generated html to page
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$(".book").append(html)
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});
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