119 lines
2.8 KiB
JavaScript
119 lines
2.8 KiB
JavaScript
define([
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"jquery",
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"underscore",
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"utils"
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], function($, _, utils) {
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var toc = {
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extensionId: "toc",
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extensionName: "Table of content",
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optional: true,
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settingsBloc: '<p>Generates a table of content when a [TOC] marker is found.</p>'
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};
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// TOC element description
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function TocElement(tagName, anchor, text) {
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this.tagName = tagName;
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this.anchor = anchor;
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this.text = text;
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this.children = [];
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}
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TocElement.prototype.childrenToString = function() {
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if(this.children.length === 0) {
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return "";
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}
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var result = "<ul>";
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_.each(this.children, function(child) {
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result += child.toString();
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});
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result += "</ul>";
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return result;
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};
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TocElement.prototype.toString = function() {
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var result = "<li>";
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if(this.anchor && this.text) {
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result += '<a href="#' + this.anchor + '">' + this.text + '</a>';
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}
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result += this.childrenToString() + "</li>";
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return result;
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};
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// Transform flat list of TocElement into a tree
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function groupTags(array, level) {
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level = level || 1;
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var tagName = "H" + level;
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var result = [];
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var currentElement = undefined;
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function pushCurrentElement() {
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if(currentElement !== undefined) {
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if(currentElement.children.length > 0) {
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currentElement.children = groupTags(currentElement.children, level + 1);
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}
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result.push(currentElement);
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}
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}
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_.each(array, function(element, index) {
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if(element.tagName != tagName) {
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if(currentElement === undefined) {
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currentElement = new TocElement();
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}
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currentElement.children.push(element);
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}
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else {
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pushCurrentElement();
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currentElement = element;
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}
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});
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pushCurrentElement();
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return result;
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}
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// Build the TOC
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function buildToc() {
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var anchorList = {};
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function createAnchor(element) {
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var id = element.prop("id") || utils.slugify(element.text());
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var anchor = id;
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var index = 0;
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while(_.has(anchorList, anchor)) {
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anchor = id + "-" + (++index);
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}
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anchorList[anchor] = true;
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// Update the id of the element
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element.prop("id", anchor);
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return anchor;
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}
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var elementList = [];
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$("#wmd-preview > h1," +
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"#wmd-preview > h2," +
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"#wmd-preview > h3," +
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"#wmd-preview > h4," +
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"#wmd-preview > h5," +
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"#wmd-preview > h6").each(function() {
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elementList.push(new TocElement(
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$(this).prop("tagName"),
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createAnchor($(this)),
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$(this).text()
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));
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});
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elementList = groupTags(elementList);
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return '<div class="toc"><ul>' + elementList.toString() + '</ul></div>';
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}
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toc.onEditorConfigure = function(editor) {
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// Run TOC generation when conversion is finished directly on HTML
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editor.hooks.chain("onPreviewRefresh", function() {
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var toc = buildToc();
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var html = $("#wmd-preview").html();
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html = html.replace(/<p>\[TOC\]<\/p>/g, toc);
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$("#wmd-preview").html(html);
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});
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};
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return toc;
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});
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