Fixed prevent XSS might break lots of tags and only need after rendered
This commit is contained in:
Cheng-Han, Wu
parent
176021ccd8
commit
4c4a0e0f3f
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@ -11,7 +11,6 @@ var shortId = require('shortid');
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var metaMarked = require('meta-marked');
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var querystring = require('querystring');
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var request = require('request');
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var xss = require('xss');
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//core
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var config = require("../config.js");
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@ -228,7 +227,6 @@ function showPublishNote(req, res, next) {
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//na
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}
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var updatetime = notedata.update_time;
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body = xss(body); // prevent xss
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var text = S(body).escapeHTML().s;
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var title = notedata.title;
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var decodedTitle = LZString.decompressFromBase64(title);
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@ -612,7 +610,6 @@ function showPublishSlide(req, res, next) {
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var decodedTitle = LZString.decompressFromBase64(title);
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if (decodedTitle) title = decodedTitle;
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title = Note.generateWebTitle(title);
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body = xss(body); // prevent xss
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var text = S(body).escapeHTML().s;
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render(res, title, text);
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});
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@ -49,8 +49,7 @@
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"socket.io": "1.4.4",
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"string": "^3.3.1",
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"toobusy-js": "^0.4.2",
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"winston": "^2.1.1",
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"xss": "^0.2.10"
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"winston": "^2.1.1"
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},
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"engines": {
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"node": ">=4.x"
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@ -180,7 +180,7 @@ function finishView(view) {
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.each(function (key, value) {
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$.ajax({
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type: 'GET',
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url: '//vimeo.com/api/v2/video/' + $(value).attr('videoid') + '.json',
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url: '//vimeo.com/api/v2/video/' + $(value).attr('data-videoid') + '.json',
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jsonp: 'callback',
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dataType: 'jsonp',
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success: function (data) {
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@ -285,7 +285,7 @@ function finishView(view) {
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.each(function (key, value) {
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$.ajax({
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type: 'GET',
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url: '//www.slideshare.net/api/oembed/2?url=http://www.slideshare.net/' + $(value).attr('slideshareid') + '&format=json',
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url: '//www.slideshare.net/api/oembed/2?url=http://www.slideshare.net/' + $(value).attr('data-slideshareid') + '&format=json',
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jsonp: 'callback',
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dataType: 'jsonp',
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success: function (data) {
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@ -304,7 +304,7 @@ function finishView(view) {
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//speakerdeck
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view.find(".speakerdeck.raw").removeClass("raw")
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.each(function (key, value) {
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var url = 'https://speakerdeck.com/oembed.json?url=https%3A%2F%2Fspeakerdeck.com%2F' + encodeURIComponent($(value).attr('speakerdeckid'));
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var url = 'https://speakerdeck.com/oembed.json?url=https%3A%2F%2Fspeakerdeck.com%2F' + encodeURIComponent($(value).attr('data-speakerdeckid'));
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//use yql because speakerdeck not support jsonp
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$.ajax({
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url: 'https://query.yahooapis.com/v1/public/yql',
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@ -383,8 +383,8 @@ function exportToHTML(view) {
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$(value).attr('src', 'https://www.tortue.me/emoji/' + name + '.png');
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});
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//replace video to iframe
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src.find("div[videoid]").each(function (key, value) {
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var id = $(value).attr('videoid');
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src.find("div[data-videoid]").each(function (key, value) {
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var id = $(value).attr('data-videoid');
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var style = $(value).attr('style');
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var url = null;
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if ($(value).hasClass('youtube')) {
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@ -534,9 +534,9 @@ function smoothHashScroll() {
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}
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function imgPlayiframe(element, src) {
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if (!$(element).attr("videoid")) return;
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if (!$(element).attr("data-videoid")) return;
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var iframe = $("<iframe frameborder='0' webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>");
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$(iframe).attr("src", src + $(element).attr("videoid") + '?autoplay=1');
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$(iframe).attr("src", src + $(element).attr("data-videoid") + '?autoplay=1');
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$(element).find('img').css('visibility', 'hidden');
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$(element).append(iframe);
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}
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@ -730,7 +730,7 @@ var youtubePlugin = new Plugin(
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var videoid = match[1];
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if (!videoid) return;
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var div = $('<div class="youtube raw"></div>');
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div.attr('videoid', videoid);
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div.attr('data-videoid', videoid);
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var thumbnail_src = '//img.youtube.com/vi/' + videoid + '/hqdefault.jpg';
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var image = '<img src="' + thumbnail_src + '" />';
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div.append(image);
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@ -749,7 +749,7 @@ var vimeoPlugin = new Plugin(
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var videoid = match[1];
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if (!videoid) return;
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var div = $('<div class="vimeo raw"></div>');
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div.attr('videoid', videoid);
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div.attr('data-videoid', videoid);
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var icon = '<i class="icon fa fa-vimeo-square fa-5x"></i>';
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div.append(icon);
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return div[0].outerHTML;
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@ -799,7 +799,7 @@ var slidesharePlugin = new Plugin(
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function (match, utils) {
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var slideshareid = match[1];
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var div = $('<div class="slideshare raw"></div>');
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div.attr('slideshareid', slideshareid);
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div.attr('data-slideshareid', slideshareid);
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return div[0].outerHTML;
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}
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);
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@ -812,7 +812,7 @@ var speakerdeckPlugin = new Plugin(
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function (match, utils) {
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var speakerdeckid = match[1];
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var div = $('<div class="speakerdeck raw"></div>');
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div.attr('speakerdeckid', speakerdeckid);
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div.attr('data-speakerdeckid', speakerdeckid);
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return div[0].outerHTML;
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}
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);
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@ -2132,11 +2132,12 @@ var lastResult = null;
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function updateViewInner() {
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if (currentMode == modeType.edit || !isDirty) return;
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var value = editor.getValue();
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value = filterXSS(value); // prevent xss
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md.meta = {};
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md.render(value); //only for get meta
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parseMeta(md, ui.area.markdown, $('#toc'), $('#toc-affix'));
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var result = postProcess(md.render(value)).children().toArray();
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var rendered = md.render(value);
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rendered = preventXSS(rendered);
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var result = postProcess(rendered).children().toArray();
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partialUpdate(result, lastResult, ui.area.markdown.children().toArray());
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if (result && lastResult && result.length != lastResult.length)
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updateDataAttrs(result, ui.area.markdown.children().toArray());
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@ -3,7 +3,9 @@ var text = $('<textarea/>').html(markdown.html()).text();
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md.meta = {};
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md.render(text); //only for get meta
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parseMeta(md, markdown, $('#toc'), $('#toc-affix'));
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var result = postProcess(md.render(text));
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var rendered = md.render(text);
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rendered = preventXSS(rendered);
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var result = postProcess(rendered);
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markdown.html(result.html());
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$(document.body).show();
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finishView(markdown);
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13
public/js/render.js
Normal file
13
public/js/render.js
Normal file
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@ -0,0 +1,13 @@
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function preventXSS(html) {
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var options = {
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allowCommentTag: true,
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onIgnoreTagAttr: function (tag, name, value, isWhiteAttr) {
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// allow attr start with 'data-' or equal 'id' and 'class'
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if (name.substr(0, 5) === 'data-' || name === 'id' || name === 'class') {
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// escape its value using built-in escapeAttrValue function
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return name + '="' + filterXSS.escapeAttrValue(value) + '"';
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}
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}
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};
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return filterXSS(html, options);
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}
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405
public/js/reveal-markdown.js
Executable file
405
public/js/reveal-markdown.js
Executable file
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@ -0,0 +1,405 @@
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/**
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* The reveal.js markdown plugin. Handles parsing of
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* markdown inside of presentations as well as loading
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* of external markdown documents.
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*/
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(function( root, factory ) {
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if( typeof exports === 'object' ) {
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module.exports = factory( require( './marked' ) );
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}
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else {
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// Browser globals (root is window)
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root.RevealMarkdown = factory( root.marked );
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root.RevealMarkdown.initialize();
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}
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}( this, function( marked ) {
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if( typeof marked === 'undefined' ) {
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throw 'The reveal.js Markdown plugin requires marked to be loaded';
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}
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if( typeof hljs !== 'undefined' ) {
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marked.setOptions({
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highlight: function( lang, code ) {
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return hljs.highlightAuto( lang, code ).value;
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}
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});
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}
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var DEFAULT_SLIDE_SEPARATOR = '^\r?\n---\r?\n$',
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DEFAULT_NOTES_SEPARATOR = 'note:',
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DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$',
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DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$';
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var SCRIPT_END_PLACEHOLDER = '__SCRIPT_END__';
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/**
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* Retrieves the markdown contents of a slide section
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* element. Normalizes leading tabs/whitespace.
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*/
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function getMarkdownFromSlide( section ) {
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var template = section.querySelector( 'script' );
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// strip leading whitespace so it isn't evaluated as code
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var text = ( template || section ).textContent;
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// restore script end tags
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text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' );
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var leadingWs = text.match( /^\n?(\s*)/ )[1].length,
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leadingTabs = text.match( /^\n?(\t*)/ )[1].length;
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if( leadingTabs > 0 ) {
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text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}','g'), '\n' );
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}
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else if( leadingWs > 1 ) {
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text = text.replace( new RegExp('\\n? {' + leadingWs + '}', 'g'), '\n' );
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}
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return text;
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}
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/**
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* Given a markdown slide section element, this will
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* return all arguments that aren't related to markdown
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* parsing. Used to forward any other user-defined arguments
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* to the output markdown slide.
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*/
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function getForwardedAttributes( section ) {
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var attributes = section.attributes;
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var result = [];
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for( var i = 0, len = attributes.length; i < len; i++ ) {
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var name = attributes[i].name,
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value = attributes[i].value;
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// disregard attributes that are used for markdown loading/parsing
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if( /data\-(markdown|separator|vertical|notes)/gi.test( name ) ) continue;
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if( value ) {
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result.push( name + '="' + value + '"' );
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}
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else {
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result.push( name );
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}
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}
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return result.join( ' ' );
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}
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/**
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* Inspects the given options and fills out default
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* values for what's not defined.
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*/
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function getSlidifyOptions( options ) {
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options = options || {};
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options.separator = options.separator || DEFAULT_SLIDE_SEPARATOR;
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options.notesSeparator = options.notesSeparator || DEFAULT_NOTES_SEPARATOR;
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options.attributes = options.attributes || '';
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return options;
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}
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/**
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* Helper function for constructing a markdown slide.
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*/
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function createMarkdownSlide( content, options ) {
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options = getSlidifyOptions( options );
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var notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
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if( notesMatch.length === 2 ) {
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content = notesMatch[0] + '<aside class="notes" data-markdown>' + notesMatch[1].trim() + '</aside>';
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}
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// prevent script end tags in the content from interfering
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// with parsing
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content = content.replace( /<\/script>/g, SCRIPT_END_PLACEHOLDER );
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return '<script type="text/template">' + content + '</script>';
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}
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/**
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* Parses a data string into multiple slides based
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* on the passed in separator arguments.
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*/
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function slidify( markdown, options ) {
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options = getSlidifyOptions( options );
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var separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
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horizontalSeparatorRegex = new RegExp( options.separator );
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var matches,
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lastIndex = 0,
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isHorizontal,
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wasHorizontal = true,
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content,
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sectionStack = [];
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// iterate until all blocks between separators are stacked up
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while( matches = separatorRegex.exec( markdown ) ) {
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notes = null;
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// determine direction (horizontal by default)
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isHorizontal = horizontalSeparatorRegex.test( matches[0] );
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if( !isHorizontal && wasHorizontal ) {
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// create vertical stack
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sectionStack.push( [] );
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}
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// pluck slide content from markdown input
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content = markdown.substring( lastIndex, matches.index );
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if( isHorizontal && wasHorizontal ) {
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// add to horizontal stack
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sectionStack.push( content );
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}
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else {
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// add to vertical stack
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sectionStack[sectionStack.length-1].push( content );
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}
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lastIndex = separatorRegex.lastIndex;
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wasHorizontal = isHorizontal;
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}
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// add the remaining slide
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( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) );
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var markdownSections = '';
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// flatten the hierarchical stack, and insert <section data-markdown> tags
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for( var i = 0, len = sectionStack.length; i < len; i++ ) {
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// vertical
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if( sectionStack[i] instanceof Array ) {
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markdownSections += '<section '+ options.attributes +'>';
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sectionStack[i].forEach( function( child ) {
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markdownSections += '<section data-markdown>' + createMarkdownSlide( child, options ) + '</section>';
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} );
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markdownSections += '</section>';
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}
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else {
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markdownSections += '<section '+ options.attributes +' data-markdown>' + createMarkdownSlide( sectionStack[i], options ) + '</section>';
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}
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}
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return markdownSections;
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}
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/**
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* Parses any current data-markdown slides, splits
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* multi-slide markdown into separate sections and
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* handles loading of external markdown.
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*/
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function processSlides() {
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var sections = document.querySelectorAll( '[data-markdown]'),
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section;
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for( var i = 0, len = sections.length; i < len; i++ ) {
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section = sections[i];
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if( section.getAttribute( 'data-markdown' ).length ) {
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var xhr = new XMLHttpRequest(),
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url = section.getAttribute( 'data-markdown' );
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datacharset = section.getAttribute( 'data-charset' );
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// see https://developer.mozilla.org/en-US/docs/Web/API/element.getAttribute#Notes
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if( datacharset != null && datacharset != '' ) {
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xhr.overrideMimeType( 'text/html; charset=' + datacharset );
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}
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xhr.onreadystatechange = function() {
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if( xhr.readyState === 4 ) {
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// file protocol yields status code 0 (useful for local debug, mobile applications etc.)
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if ( ( xhr.status >= 200 && xhr.status < 300 ) || xhr.status === 0 ) {
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section.outerHTML = slidify( xhr.responseText, {
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separator: section.getAttribute( 'data-separator' ),
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verticalSeparator: section.getAttribute( 'data-separator-vertical' ),
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notesSeparator: section.getAttribute( 'data-separator-notes' ),
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attributes: getForwardedAttributes( section )
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});
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}
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else {
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section.outerHTML = '<section data-state="alert">' +
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'ERROR: The attempt to fetch ' + url + ' failed with HTTP status ' + xhr.status + '.' +
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'Check your browser\'s JavaScript console for more details.' +
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'<p>Remember that you need to serve the presentation HTML from a HTTP server.</p>' +
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'</section>';
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}
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}
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};
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xhr.open( 'GET', url, false );
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try {
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xhr.send();
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}
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catch ( e ) {
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alert( 'Failed to get the Markdown file ' + url + '. Make sure that the presentation and the file are served by a HTTP server and the file can be found there. ' + e );
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}
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}
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else if( section.getAttribute( 'data-separator' ) || section.getAttribute( 'data-separator-vertical' ) || section.getAttribute( 'data-separator-notes' ) ) {
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section.outerHTML = slidify( getMarkdownFromSlide( section ), {
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separator: section.getAttribute( 'data-separator' ),
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verticalSeparator: section.getAttribute( 'data-separator-vertical' ),
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notesSeparator: section.getAttribute( 'data-separator-notes' ),
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attributes: getForwardedAttributes( section )
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});
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}
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else {
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section.innerHTML = createMarkdownSlide( getMarkdownFromSlide( section ) );
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}
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}
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}
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/**
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* Check if a node value has the attributes pattern.
|
||||
* If yes, extract it and add that value as one or several attributes
|
||||
* the the terget element.
|
||||
*
|
||||
* You need Cache Killer on Chrome to see the effect on any FOM transformation
|
||||
* directly on refresh (F5)
|
||||
* http://stackoverflow.com/questions/5690269/disabling-chrome-cache-for-website-development/7000899#answer-11786277
|
||||
*/
|
||||
function addAttributeInElement( node, elementTarget, separator ) {
|
||||
|
||||
var mardownClassesInElementsRegex = new RegExp( separator, 'mg' );
|
||||
var mardownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"=]+?)\"", 'mg' );
|
||||
var nodeValue = node.nodeValue;
|
||||
if( matches = mardownClassesInElementsRegex.exec( nodeValue ) ) {
|
||||
|
||||
var classes = matches[1];
|
||||
nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( mardownClassesInElementsRegex.lastIndex );
|
||||
node.nodeValue = nodeValue;
|
||||
while( matchesClass = mardownClassRegex.exec( classes ) ) {
|
||||
elementTarget.setAttribute( matchesClass[1], matchesClass[2] );
|
||||
}
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Add attributes to the parent element of a text node,
|
||||
* or the element of an attribute node.
|
||||
*/
|
||||
function addAttributes( section, element, previousElement, separatorElementAttributes, separatorSectionAttributes ) {
|
||||
|
||||
if ( element != null && element.childNodes != undefined && element.childNodes.length > 0 ) {
|
||||
previousParentElement = element;
|
||||
for( var i = 0; i < element.childNodes.length; i++ ) {
|
||||
childElement = element.childNodes[i];
|
||||
if ( i > 0 ) {
|
||||
j = i - 1;
|
||||
while ( j >= 0 ) {
|
||||
aPreviousChildElement = element.childNodes[j];
|
||||
if ( typeof aPreviousChildElement.setAttribute == 'function' && aPreviousChildElement.tagName != "BR" ) {
|
||||
previousParentElement = aPreviousChildElement;
|
||||
break;
|
||||
}
|
||||
j = j - 1;
|
||||
}
|
||||
}
|
||||
parentSection = section;
|
||||
if( childElement.nodeName == "section" ) {
|
||||
parentSection = childElement ;
|
||||
previousParentElement = childElement ;
|
||||
}
|
||||
if ( typeof childElement.setAttribute == 'function' || childElement.nodeType == Node.COMMENT_NODE ) {
|
||||
addAttributes( parentSection, childElement, previousParentElement, separatorElementAttributes, separatorSectionAttributes );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if ( element.nodeType == Node.COMMENT_NODE ) {
|
||||
if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) == false ) {
|
||||
addAttributeInElement( element, section, separatorSectionAttributes );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts any current data-markdown slides in the
|
||||
* DOM to HTML.
|
||||
*/
|
||||
function convertSlides() {
|
||||
|
||||
var sections = document.querySelectorAll( '[data-markdown]');
|
||||
|
||||
for( var i = 0, len = sections.length; i < len; i++ ) {
|
||||
|
||||
var section = sections[i];
|
||||
|
||||
// Only parse the same slide once
|
||||
if( !section.getAttribute( 'data-markdown-parsed' ) ) {
|
||||
|
||||
section.setAttribute( 'data-markdown-parsed', true )
|
||||
|
||||
var notes = section.querySelector( 'aside.notes' );
|
||||
var markdown = getMarkdownFromSlide( section );
|
||||
|
||||
var rendered = marked( markdown );
|
||||
rendered = preventXSS(rendered);
|
||||
|
||||
section.innerHTML = rendered;
|
||||
addAttributes( section, section, null, section.getAttribute( 'data-element-attributes' ) ||
|
||||
section.parentNode.getAttribute( 'data-element-attributes' ) ||
|
||||
DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR,
|
||||
section.getAttribute( 'data-attributes' ) ||
|
||||
section.parentNode.getAttribute( 'data-attributes' ) ||
|
||||
DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR);
|
||||
|
||||
// If there were notes, we need to re-add them after
|
||||
// having overwritten the section's HTML
|
||||
if( notes ) {
|
||||
section.appendChild( notes );
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// API
|
||||
return {
|
||||
|
||||
initialize: function() {
|
||||
processSlides();
|
||||
convertSlides();
|
||||
},
|
||||
|
||||
// TODO: Do these belong in the API?
|
||||
processSlides: processSlides,
|
||||
convertSlides: convertSlides,
|
||||
slidify: slidify
|
||||
|
||||
};
|
||||
|
||||
}));
|
||||
|
|
@ -60,6 +60,7 @@
|
|||
<script type="text/javascript" src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" defer></script>
|
||||
<script src="/js/common.js" defer></script>
|
||||
<script src="/js/extra.js" defer></script>
|
||||
<script src="/js/render.js" defer></script>
|
||||
<script src="/js/history.js" defer></script>
|
||||
<script src="/js/index.js" defer></script>
|
||||
<script src="/js/syncscroll.js" defer></script>
|
||||
|
|
@ -76,6 +76,7 @@
|
|||
<script src="<%- url %>/vendor/js-yaml/dist/js-yaml.min.js" defer></script>
|
||||
<% } %>
|
||||
<script src="<%- url %>/vendor/lz-string/libs/lz-string.min.js" defer></script>
|
||||
<script src="<%- url %>/vendor/xss/dist/xss.min.js" defer></script>
|
||||
<script src="<%- url %>/vendor/remarkable.min.js" defer></script>
|
||||
<script src="<%- url %>/vendor/remarkable-regex.js" defer></script>
|
||||
<script src="<%- url %>/vendor/gist-embed.js" defer></script>
|
||||
|
|
@ -94,4 +95,5 @@
|
|||
</script>
|
||||
<script type="text/javascript" src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" defer></script>
|
||||
<script src="<%- url %>/js/extra.js" defer></script>
|
||||
<script src="<%- url %>/js/render.js" defer></script>
|
||||
<script src="<%- url %>/js/pretty.js" defer></script>
|
||||
|
|
@ -31,6 +31,8 @@
|
|||
<script src="/vendor/reveal.js/lib/js/head.min.js"></script>
|
||||
<script src="/vendor/reveal.js/js/reveal.js"></script>
|
||||
<script src="/vendor/string.min.js"></script>
|
||||
<script src="/vendor/xss/dist/xss.min.js"></script>
|
||||
<script src="/js/render.js"></script>
|
||||
|
||||
<script>
|
||||
var body = $(".slides").html();
|
||||
|
|
@ -53,7 +55,7 @@
|
|||
var deps = [
|
||||
{ src: '/vendor/reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
|
||||
{ src: '/vendor/reveal.js/plugin/markdown/marked.js', condition: function() { return !!document.querySelector('[data-markdown]'); } },
|
||||
{ src: '/vendor/reveal.js/plugin/markdown/markdown.js', condition: function() { return !!document.querySelector('[data-markdown]'); } },
|
||||
{ src: '/js/reveal-markdown.js', condition: function() { return !!document.querySelector('[data-markdown]'); } },
|
||||
{ src: '/vendor/reveal.js/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
|
||||
{ src: '/vendor/reveal.js/plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } },
|
||||
{ src: '/vendor/reveal.js/plugin/math/math.js', async: true }
|
||||
|
|
|
|||
Loading…
Reference in a new issue