diff options
Diffstat (limited to '2018fosdem/plugin/markdown')
| -rw-r--r-- | 2018fosdem/plugin/markdown/example.html | 129 | ||||
| -rw-r--r-- | 2018fosdem/plugin/markdown/example.md | 31 | ||||
| -rw-r--r-- | 2018fosdem/plugin/markdown/markdown.js | 405 | ||||
| -rw-r--r-- | 2018fosdem/plugin/markdown/marked.js | 6 |
4 files changed, 571 insertions, 0 deletions
diff --git a/2018fosdem/plugin/markdown/example.html b/2018fosdem/plugin/markdown/example.html new file mode 100644 index 0000000..36f6a51 --- /dev/null +++ b/2018fosdem/plugin/markdown/example.html @@ -0,0 +1,129 @@ +<!doctype html> +<html lang="en"> + + <head> + <meta charset="utf-8"> + + <title>reveal.js - Markdown Demo</title> + + <link rel="stylesheet" href="../../css/reveal.css"> + <link rel="stylesheet" href="../../css/theme/white.css" id="theme"> + + <link rel="stylesheet" href="../../lib/css/zenburn.css"> + </head> + + <body> + + <div class="reveal"> + + <div class="slides"> + + <!-- Use external markdown resource, separate slides by three newlines; vertical slides by two newlines --> + <section data-markdown="example.md" data-separator="^\n\n\n" data-separator-vertical="^\n\n"></section> + + <!-- Slides are separated by three dashes (quick 'n dirty regular expression) --> + <section data-markdown data-separator="---"> + <script type="text/template"> + ## Demo 1 + Slide 1 + --- + ## Demo 1 + Slide 2 + --- + ## Demo 1 + Slide 3 + </script> + </section> + + <!-- Slides are separated by newline + three dashes + newline, vertical slides identical but two dashes --> + <section data-markdown data-separator="^\n---\n$" data-separator-vertical="^\n--\n$"> + <script type="text/template"> + ## Demo 2 + Slide 1.1 + + -- + + ## Demo 2 + Slide 1.2 + + --- + + ## Demo 2 + Slide 2 + </script> + </section> + + <!-- No "extra" slides, since there are no separators defined (so they'll become horizontal rulers) --> + <section data-markdown> + <script type="text/template"> + A + + --- + + B + + --- + + C + </script> + </section> + + <!-- Slide attributes --> + <section data-markdown> + <script type="text/template"> + <!-- .slide: data-background="#000000" --> + ## Slide attributes + </script> + </section> + + <!-- Element attributes --> + <section data-markdown> + <script type="text/template"> + ## Element attributes + - Item 1 <!-- .element: class="fragment" data-fragment-index="2" --> + - Item 2 <!-- .element: class="fragment" data-fragment-index="1" --> + </script> + </section> + + <!-- Code --> + <section data-markdown> + <script type="text/template"> + ```php + public function foo() + { + $foo = array( + 'bar' => 'bar' + ) + } + ``` + </script> + </section> + + </div> + </div> + + <script src="../../lib/js/head.min.js"></script> + <script src="../../js/reveal.js"></script> + + <script> + + Reveal.initialize({ + controls: true, + progress: true, + history: true, + center: true, + + // Optional libraries used to extend on reveal.js + dependencies: [ + { src: '../../lib/js/classList.js', condition: function() { return !document.body.classList; } }, + { src: 'marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } }, + { src: 'markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } }, + { src: '../highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }, + { src: '../notes/notes.js' } + ] + }); + + </script> + + </body> +</html> diff --git a/2018fosdem/plugin/markdown/example.md b/2018fosdem/plugin/markdown/example.md new file mode 100644 index 0000000..6f6f577 --- /dev/null +++ b/2018fosdem/plugin/markdown/example.md @@ -0,0 +1,31 @@ +# Markdown Demo + + + +## External 1.1 + +Content 1.1 + +Note: This will only appear in the speaker notes window. + + +## External 1.2 + +Content 1.2 + + + +## External 2 + +Content 2.1 + + + +## External 3.1 + +Content 3.1 + + +## External 3.2 + +Content 3.2 diff --git a/2018fosdem/plugin/markdown/markdown.js b/2018fosdem/plugin/markdown/markdown.js new file mode 100644 index 0000000..ad596bf --- /dev/null +++ b/2018fosdem/plugin/markdown/markdown.js @@ -0,0 +1,405 @@ +/** + * The reveal.js markdown plugin. Handles parsing of + * markdown inside of presentations as well as loading + * of external markdown documents. + */ +(function( root, factory ) { + if (typeof define === 'function' && define.amd) { + root.marked = require( './marked' ); + root.RevealMarkdown = factory( root.marked ); + root.RevealMarkdown.initialize(); + } else if( typeof exports === 'object' ) { + module.exports = factory( require( './marked' ) ); + } else { + // Browser globals (root is window) + root.RevealMarkdown = factory( root.marked ); + root.RevealMarkdown.initialize(); + } +}( this, function( marked ) { + + if( typeof marked === 'undefined' ) { + throw 'The reveal.js Markdown plugin requires marked to be loaded'; + } + + if( typeof hljs !== 'undefined' ) { + marked.setOptions({ + highlight: function( lang, code ) { + return hljs.highlightAuto( lang, code ).value; + } + }); + } + + var DEFAULT_SLIDE_SEPARATOR = '^\r?\n---\r?\n$', + DEFAULT_NOTES_SEPARATOR = 'note:', + DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$', + DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$'; + + var SCRIPT_END_PLACEHOLDER = '__SCRIPT_END__'; + + + /** + * Retrieves the markdown contents of a slide section + * element. Normalizes leading tabs/whitespace. + */ + function getMarkdownFromSlide( section ) { + + var template = section.querySelector( 'script' ); + + // strip leading whitespace so it isn't evaluated as code + var text = ( template || section ).textContent; + + // restore script end tags + text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' ); + + var leadingWs = text.match( /^\n?(\s*)/ )[1].length, + leadingTabs = text.match( /^\n?(\t*)/ )[1].length; + + if( leadingTabs > 0 ) { + text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}','g'), '\n' ); + } + else if( leadingWs > 1 ) { + text = text.replace( new RegExp('\\n? {' + leadingWs + '}', 'g'), '\n' ); + } + + return text; + + } + + /** + * Given a markdown slide section element, this will + * return all arguments that aren't related to markdown + * parsing. Used to forward any other user-defined arguments + * to the output markdown slide. + */ + function getForwardedAttributes( section ) { + + var attributes = section.attributes; + var result = []; + + for( var i = 0, len = attributes.length; i < len; i++ ) { + var name = attributes[i].name, + value = attributes[i].value; + + // disregard attributes that are used for markdown loading/parsing + if( /data\-(markdown|separator|vertical|notes)/gi.test( name ) ) continue; + + if( value ) { + result.push( name + '="' + value + '"' ); + } + else { + result.push( name ); + } + } + + return result.join( ' ' ); + + } + + /** + * Inspects the given options and fills out default + * values for what's not defined. + */ + function getSlidifyOptions( options ) { + + options = options || {}; + options.separator = options.separator || DEFAULT_SLIDE_SEPARATOR; + options.notesSeparator = options.notesSeparator || DEFAULT_NOTES_SEPARATOR; + options.attributes = options.attributes || ''; + + return options; + + } + + /** + * Helper function for constructing a markdown slide. + */ + function createMarkdownSlide( content, options ) { + + options = getSlidifyOptions( options ); + + var notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) ); + + if( notesMatch.length === 2 ) { + content = notesMatch[0] + '<aside class="notes">' + marked(notesMatch[1].trim()) + '</aside>'; + } + + // prevent script end tags in the content from interfering + // with parsing + content = content.replace( /<\/script>/g, SCRIPT_END_PLACEHOLDER ); + + return '<script type="text/template">' + content + '</script>'; + + } + + /** + * Parses a data string into multiple slides based + * on the passed in separator arguments. + */ + function slidify( markdown, options ) { + + options = getSlidifyOptions( options ); + + var separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ), + horizontalSeparatorRegex = new RegExp( options.separator ); + + var matches, + lastIndex = 0, + isHorizontal, + wasHorizontal = true, + content, + sectionStack = []; + + // iterate until all blocks between separators are stacked up + while( matches = separatorRegex.exec( markdown ) ) { + notes = null; + + // determine direction (horizontal by default) + isHorizontal = horizontalSeparatorRegex.test( matches[0] ); + + if( !isHorizontal && wasHorizontal ) { + // create vertical stack + sectionStack.push( [] ); + } + + // pluck slide content from markdown input + content = markdown.substring( lastIndex, matches.index ); + + if( isHorizontal && wasHorizontal ) { + // add to horizontal stack + sectionStack.push( content ); + } + else { + // add to vertical stack + sectionStack[sectionStack.length-1].push( content ); + } + + lastIndex = separatorRegex.lastIndex; + wasHorizontal = isHorizontal; + } + + // add the remaining slide + ( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) ); + + var markdownSections = ''; + + // flatten the hierarchical stack, and insert <section data-markdown> tags + for( var i = 0, len = sectionStack.length; i < len; i++ ) { + // vertical + if( sectionStack[i] instanceof Array ) { + markdownSections += '<section '+ options.attributes +'>'; + + sectionStack[i].forEach( function( child ) { + markdownSections += '<section data-markdown>' + createMarkdownSlide( child, options ) + '</section>'; + } ); + + markdownSections += '</section>'; + } + else { + markdownSections += '<section '+ options.attributes +' data-markdown>' + createMarkdownSlide( sectionStack[i], options ) + '</section>'; + } + } + + return markdownSections; + + } + + /** + * Parses any current data-markdown slides, splits + * multi-slide markdown into separate sections and + * handles loading of external markdown. + */ + function processSlides() { + + var sections = document.querySelectorAll( '[data-markdown]'), + section; + + for( var i = 0, len = sections.length; i < len; i++ ) { + + section = sections[i]; + + if( section.getAttribute( 'data-markdown' ).length ) { + + var xhr = new XMLHttpRequest(), + url = section.getAttribute( 'data-markdown' ); + + datacharset = section.getAttribute( 'data-charset' ); + + // see https://developer.mozilla.org/en-US/docs/Web/API/element.getAttribute#Notes + if( datacharset != null && datacharset != '' ) { + xhr.overrideMimeType( 'text/html; charset=' + datacharset ); + } + + xhr.onreadystatechange = function() { + if( xhr.readyState === 4 ) { + // file protocol yields status code 0 (useful for local debug, mobile applications etc.) + if ( ( xhr.status >= 200 && xhr.status < 300 ) || xhr.status === 0 ) { + + section.outerHTML = slidify( xhr.responseText, { + separator: section.getAttribute( 'data-separator' ), + verticalSeparator: section.getAttribute( 'data-separator-vertical' ), + notesSeparator: section.getAttribute( 'data-separator-notes' ), + attributes: getForwardedAttributes( section ) + }); + + } + else { + + section.outerHTML = '<section data-state="alert">' + + 'ERROR: The attempt to fetch ' + url + ' failed with HTTP status ' + xhr.status + '.' + + 'Check your browser\'s JavaScript console for more details.' + + '<p>Remember that you need to serve the presentation HTML from a HTTP server.</p>' + + '</section>'; + + } + } + }; + + xhr.open( 'GET', url, false ); + + try { + xhr.send(); + } + catch ( e ) { + 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 ); + } + + } + else if( section.getAttribute( 'data-separator' ) || section.getAttribute( 'data-separator-vertical' ) || section.getAttribute( 'data-separator-notes' ) ) { + + section.outerHTML = slidify( getMarkdownFromSlide( section ), { + separator: section.getAttribute( 'data-separator' ), + verticalSeparator: section.getAttribute( 'data-separator-vertical' ), + notesSeparator: section.getAttribute( 'data-separator-notes' ), + attributes: getForwardedAttributes( section ) + }); + + } + else { + section.innerHTML = createMarkdownSlide( getMarkdownFromSlide( section ) ); + } + } + + } + + /** + * 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 ); + + section.innerHTML = marked( markdown ); + 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 + + }; + +})); diff --git a/2018fosdem/plugin/markdown/marked.js b/2018fosdem/plugin/markdown/marked.js new file mode 100644 index 0000000..70af29b --- /dev/null +++ b/2018fosdem/plugin/markdown/marked.js @@ -0,0 +1,6 @@ +/** + * marked - a markdown parser + * Copyright (c) 2011-2014, Christopher Jeffrey. 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\ No newline at end of file |