markdown refactoring; comments, renamed functions, shorter argument lists
Hakim El Hattab
parent
1c5da37ca6
commit
7f85c21386
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@ -17,7 +17,11 @@
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});
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}
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function stripLeadingWhitespace( section ) {
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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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@ -36,20 +40,14 @@
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return text;
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};
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function createSlide( data ) {
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var content = data.content || data;
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if( data.notes ) {
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content += '<aside class="notes" data-markdown>' + data.notes + '</aside>';
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}
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return '<script type="text/template">' + content + '</script>';
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};
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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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@ -72,17 +70,39 @@
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return result.join( ' ' );
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};
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}
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function slidifyMarkdown( markdown, separator, verticalSeparator, noteSeparator, attributes ) {
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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( data ) {
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separator = separator || '^\n---\n$';
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noteSeparator = noteSeparator || 'note:';
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var content = data.content || data;
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var separatorRegex = new RegExp( separator + ( verticalSeparator ? '|' + verticalSeparator : '' ), 'mg' ),
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horizontalSeparatorRegex = new RegExp( separator ),
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notesSeparatorRegex = new RegExp( noteSeparator, 'mgi' ),
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matches,
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if( data.notes ) {
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content += '<aside class="notes" data-markdown>' + data.notes + '</aside>';
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}
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return '<script type="text/template">' + content + '</script>';
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}
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/**
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* Parses a data string into multiple slides based
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* on the passed in separator arguments.
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*/
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function slidifyMarkdown( markdown, options ) {
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options = options || {};
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options.separator = options.separator || '^\n---\n$';
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options.notesSeparator = options.notesSeparator || 'note:';
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options.attributes = options.attributes || '';
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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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notesSeparatorRegex = new RegExp( options.notesSeparator, 'mgi' );
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var matches,
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noteMatch,
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lastIndex = 0,
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isHorizontal,
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@ -90,8 +110,7 @@
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content,
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notes,
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slide,
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sectionStack = [],
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markdownSections = '';
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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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@ -122,7 +141,8 @@
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if( isHorizontal && wasHorizontal ) {
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// add to horizontal stack
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sectionStack.push( slide );
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} else {
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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( slide );
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}
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@ -134,22 +154,26 @@
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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 k = 0, klen = sectionStack.length; k < klen; k++ ) {
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// vertical
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if( sectionStack[k].propertyIsEnumerable( length ) && typeof sectionStack[k].splice === 'function' ) {
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markdownSections += '<section '+ attributes +'>' +
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'<section data-markdown>' + sectionStack[k].map( createSlide ).join( '</section><section data-markdown>' ) + '</section>' +
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markdownSections += '<section '+ options.attributes +'>' +
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'<section data-markdown>' + sectionStack[k].map( createMarkdownSlide ).join( '</section><section data-markdown>' ) + '</section>' +
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'</section>';
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} else {
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markdownSections += '<section '+ attributes +' data-markdown>' + createSlide( sectionStack[k] ) + '</section>';
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}
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else {
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markdownSections += '<section '+ options.attributes +' data-markdown>' + createMarkdownSlide( sectionStack[k] ) + '</section>';
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}
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}
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return markdownSections;
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};
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function queryExternalMarkdown() {
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}
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function loadExternalMarkdown() {
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var sections = document.querySelectorAll( '[data-markdown]'),
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section;
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@ -173,12 +197,23 @@
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xhr.onreadystatechange = function() {
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if( xhr.readyState === 4 ) {
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if ( xhr.status >= 200 && xhr.status < 300 ) {
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section.outerHTML = slidifyMarkdown( xhr.responseText, section.getAttribute( 'data-separator' ), section.getAttribute( 'data-vertical' ), section.getAttribute( 'data-notes' ), getForwardedAttributes( section ) );
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section.outerHTML = slidifyMarkdown( xhr.responseText, {
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separator: section.getAttribute( 'data-separator' ),
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verticalSeparator: section.getAttribute( 'data-vertical' ),
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notesSeparator: section.getAttribute( 'data-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">ERROR: The attempt to fetch ' + url + ' failed with the 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 and the Markdown file must be there too.</p></section>';
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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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@ -192,43 +227,45 @@
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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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} else if( section.getAttribute( 'data-separator' ) ) {
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}
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else if( section.getAttribute( 'data-separator' ) ) {
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var markdown = stripLeadingWhitespace( section );
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section.outerHTML = slidifyMarkdown( markdown, section.getAttribute( 'data-separator' ), section.getAttribute( 'data-vertical' ), section.getAttribute( 'data-notes' ), getForwardedAttributes( section ) );
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section.outerHTML = slidifyMarkdown( getMarkdownFromSlide( section ), {
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separator: section.getAttribute( 'data-separator' ),
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verticalSeparator: section.getAttribute( 'data-vertical' ),
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notesSeparator: section.getAttribute( 'data-notes' ),
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attributes: getForwardedAttributes( section )
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});
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}
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}
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};
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}
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function queryMarkdownSlides() {
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function convertMarkdownToHTML() {
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var sections = document.querySelectorAll( '[data-markdown]');
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for( var j = 0, jlen = sections.length; j < jlen; j++ ) {
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for( var i = 0, len = sections.length; i < len; i++ ) {
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makeHtml( sections[j] );
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var section = sections[i];
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var notes = section.querySelector( 'aside.notes' );
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var markdown = getMarkdownFromSlide( section );
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section.innerHTML = marked( markdown );
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// If there were notes, we need to re-add them after
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// having overwritten the section's HTML
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if( notes ) {
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section.appendChild( notes );
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}
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}
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};
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}
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function makeHtml( section ) {
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var notes = section.querySelector( 'aside.notes' );
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var markdown = stripLeadingWhitespace( section );
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section.innerHTML = marked( markdown );
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if( notes ) {
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section.appendChild( notes );
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}
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};
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queryExternalMarkdown();
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queryMarkdownSlides();
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loadExternalMarkdown();
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convertMarkdownToHTML();
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})();
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