432 lines
14 KiB
JavaScript
Executable File
432 lines
14 KiB
JavaScript
Executable File
/**
|
|
* 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 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 = '^\n---\n$',
|
|
DEFAULT_NOTES_SEPARATOR = 'note:',
|
|
DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '{\\\.\s*?([^}]+?)}',
|
|
DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '^.*?<!--\\\sslide-attributes:\\\s(.*?)-->';
|
|
|
|
|
|
/**
|
|
* 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;
|
|
|
|
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|attributes)/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 || '';
|
|
options.slideAttributesSeparator = options.slideAttributesSeparator || DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR;
|
|
|
|
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" data-markdown>' + notesMatch[1].trim() + '</aside>';
|
|
}
|
|
|
|
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 ),
|
|
slideAttributesSeparatorRegex = new RegExp( options.slideAttributesSeparator, 'm' );
|
|
|
|
var matches,
|
|
lastIndex = 0,
|
|
isHorizontal,
|
|
wasHorizontal = true,
|
|
content,
|
|
sectionStack = [],
|
|
matchAttributes,
|
|
slideAttributes = "";
|
|
|
|
// 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 ) {
|
|
// The 'data-xxx' attributes of the first child must be set on the wrapping parent section to be effective
|
|
// Mainly for data-transition (otherwise, it is ignored for the first vertical slide)
|
|
firstChild = sectionStack[i][0];
|
|
matchAttributes = slideAttributesSeparatorRegex.exec( firstChild );
|
|
slideAttributes = matchAttributes ? matchAttributes[1] : "";
|
|
dataAttributes = "";
|
|
if( slideAttributes != "" ) {
|
|
// http://stackoverflow.com/questions/18025762/javascript-regex-replace-all-word-characters-except-word-characters-between-ch
|
|
// Keep only data-attributes for the parent slide section.
|
|
dataAttributes = slideAttributes.replace( /(data-\S+=\"[^\"]+?\")|\w|[\"=]/g, function(a, b) { return b || ''; });
|
|
}
|
|
markdownSections += '<section '+ options.attributes + ' ' + dataAttributes + '>';
|
|
|
|
sectionStack[i].forEach( function( child ) {
|
|
matchAttributes = slideAttributesSeparatorRegex.exec( child );
|
|
slideAttributes = matchAttributes ? matchAttributes[1] : "";
|
|
child = matchAttributes ? child.replace( slideAttributesSeparatorRegex,"" ) : child
|
|
markdownSections += '<section ' + slideAttributes + ' data-markdown>' + createMarkdownSlide( child, options ) + '</section>';
|
|
} );
|
|
|
|
markdownSections += '</section>';
|
|
}
|
|
else {
|
|
matchAttributes = slideAttributesSeparatorRegex.exec( sectionStack[i] );
|
|
slideAttributes = matchAttributes ? matchAttributes[1] : "";
|
|
content = matchAttributes ? sectionStack[i].replace( slideAttributesSeparatorRegex,"" ) : sectionStack[i]
|
|
markdownSections += '<section '+ options.attributes + ' ' + slideAttributes +' data-markdown>' + createMarkdownSlide( content, 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 ) {
|
|
if ( xhr.status >= 200 && xhr.status < 300 ) {
|
|
section.outerHTML = slidify( xhr.responseText, {
|
|
separator: section.getAttribute( 'data-separator' ),
|
|
verticalSeparator: section.getAttribute( 'data-vertical' ),
|
|
notesSeparator: section.getAttribute( 'data-notes' ),
|
|
attributes: getForwardedAttributes( section ),
|
|
slideAttributesSeparator: section.getAttribute( 'data-attributes' ),
|
|
});
|
|
|
|
}
|
|
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-vertical' ) || section.getAttribute( 'data-notes' ) ) {
|
|
|
|
section.outerHTML = slidify( getMarkdownFromSlide( section ), {
|
|
separator: section.getAttribute( 'data-separator' ),
|
|
verticalSeparator: section.getAttribute( 'data-vertical' ),
|
|
notesSeparator: section.getAttribute( 'data-notes' ),
|
|
attributes: getForwardedAttributes( section ),
|
|
slideAttributesSeparator: section.getAttribute( 'data-attributes' ),
|
|
});
|
|
|
|
}
|
|
else {
|
|
var content = getMarkdownFromSlide( section );
|
|
var slideAttributesSeparatorRegex = new RegExp( section.getAttribute( 'data-attributes' ) || DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR, 'm' );
|
|
var matchAttributes = slideAttributesSeparatorRegex.exec( content );
|
|
if ( matchAttributes ) {
|
|
var slideAttributes = matchAttributes[1];
|
|
content = content.replace( slideAttributesSeparatorRegex,"" );
|
|
var slideAttributesRegex = new RegExp( "([^\"= ]+?)=\"([^\"=]+?)\"", 'mg' );
|
|
while( matchesAttributes = slideAttributesRegex.exec( slideAttributes ) ) {
|
|
section.setAttribute( matchesAttributes[1], matchesAttributes[2] );
|
|
}
|
|
}
|
|
section.innerHTML = createMarkdownSlide( content );
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 ) {
|
|
|
|
console.log("element='" + element.innerHTML + "', nodeType='" + element.nodeType + "'");
|
|
console.log("previousElement="+previousElement)
|
|
console.log("section=****"+section.outerHTML+"****");
|
|
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];
|
|
console.log(" Child element='" + childElement.innerHTML + "'");
|
|
if ( i > 0 ) {
|
|
previousParentElement = element.childNodes[i-1];
|
|
}
|
|
parentSection = section;
|
|
if( childElement.nodeName == "section" ) {
|
|
parentSection = childElement ;
|
|
previousParentElement = childElement ;
|
|
}
|
|
addAttributes( parentSection, childElement, previousParentElement, separatorElementAttributes, separatorSectionAttributes );
|
|
}
|
|
}
|
|
|
|
if ( element.nodeType == Node.COMMENT_NODE ) {
|
|
if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) == false ) {
|
|
addAttributeInElement( element, section, separatorSectionAttributes);
|
|
}
|
|
}
|
|
// From http://stackoverflow.com/questions/9178174/find-all-text-nodes
|
|
if( element.nodeType == Node.TEXT_NODE && /\S/.test(element.nodeValue) ) {
|
|
addAttributeInElement( element, element.parentNode, separatorElementAttributes );
|
|
}
|
|
if( element.nodeType == Node.ELEMENT_NODE && element.attributes.length > 0 ) {
|
|
for( var j = 0; j < element.attributes.length; j++ ){
|
|
var attr = element.attributes[j];
|
|
addAttributeInElement( attr, element, separatorElementAttributes );
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 );
|
|
//console.log("markdown="+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
|
|
|
|
};
|
|
|
|
}));
|