update markdown plugin formatting to match reveal.js core

main
Hakim El Hattab 10 years ago
parent f215528575
commit b968dfef15

@ -2,219 +2,230 @@
// Modified by Hakim to handle Markdown indented with tabs
(function(){
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 stripLeadingWhitespace = function(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;
};
var twrap = function(el) {
var content = el.content || el;
content += el.asideContent ? ('<aside class="notes" data-markdown>' + el.asideContent + '</aside>') : '';
return '<script type="text/template">' + content + '</script>';
};
var getForwardedAttributes = function(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( ' ' );
};
var slidifyMarkdown = function(markdown, separator, vertical, notes, attributes) {
separator = separator || '^\n---\n$';
notes = notes || 'note:';
var separatorRegex = new RegExp( separator + ( vertical ? '|' + vertical : '' ), 'mg' ),
horizontalSeparatorRegex = new RegExp( separator ),
notesSeparatorRegex = new RegExp( notes, 'mgi' ),
matches,
noteMatch,
lastIndex = 0,
isHorizontal,
wasHorizontal = true,
content,
asideContent,
slide,
sectionStack = [],
markdownSections = '';
// iterate until all blocks between separators are stacked up
while( matches = separatorRegex.exec( markdown ) ) {
asideContent = 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 );
noteMatch = content.split( notesSeparatorRegex );
if( noteMatch.length === 2 ) {
content = noteMatch[0];
asideContent = noteMatch[1].trim();
}
if( typeof marked === 'undefined' ) {
throw 'The reveal.js Markdown plugin requires marked to be loaded';
}
slide = {
content: content,
asideContent: asideContent || ""
};
if( typeof hljs !== 'undefined' ) {
marked.setOptions({
highlight: function( lang, code ) {
return hljs.highlightAuto( lang, code ).value;
}
});
}
if( isHorizontal && wasHorizontal ) {
// add to horizontal stack
sectionStack.push(slide);
} else {
// add to vertical stack
sectionStack[sectionStack.length-1].push(slide);
}
var stripLeadingWhitespace = function( section ) {
lastIndex = separatorRegex.lastIndex;
wasHorizontal = isHorizontal;
}
var template = section.querySelector( 'script' );
// add the remaining slide
(wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1]).push(markdown.substring(lastIndex));
// strip leading whitespace so it isn't evaluated as code
var text = ( template || section ).textContent;
// flatten the hierarchical stack, and insert <section data-markdown> tags
for( var k = 0, klen = sectionStack.length; k < klen; k++ ) {
// vertical
if( sectionStack[k].propertyIsEnumerable(length) && typeof sectionStack[k].splice === 'function' ) {
markdownSections += '<section '+ attributes +'>' +
'<section data-markdown>' + sectionStack[k].map(twrap).join('</section><section data-markdown>') + '</section>' +
'</section>';
} else {
markdownSections += '<section '+ attributes +' data-markdown>' + twrap( sectionStack[k] ) + '</section>';
}
}
var leadingWs = text.match( /^\n?(\s*)/ )[1].length,
leadingTabs = text.match( /^\n?(\t*)/ )[1].length;
return markdownSections;
};
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' );
}
var querySlidingMarkdown = function() {
return text;
var sections = document.querySelectorAll( '[data-markdown]'),
section;
};
for( var j = 0, jlen = sections.length; j < jlen; j++ ) {
var twrap = function( el ) {
section = sections[j];
var content = el.content || el;
if( el.asideContent ) {
content += '<aside class="notes" data-markdown>' + el.asideContent + '</aside>';
}
return '<script type="text/template">' + content + '</script>';
};
var getForwardedAttributes = function( section ) {
if( section.getAttribute('data-markdown').length ) {
var attributes = section.attributes;
var result = [];
var xhr = new XMLHttpRequest(),
url = section.getAttribute('data-markdown');
for( var i = 0, len = attributes.length; i < len; i++ ) {
var name = attributes[i].name,
value = attributes[i].value;
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);
}
// disregard attributes that are used for markdown loading/parsing
if( /data\-(markdown|separator|vertical|notes)/gi.test( name ) ) continue;
xhr.onreadystatechange = function () {
if( xhr.readyState === 4 ) {
if (xhr.status >= 200 && xhr.status < 300) {
section.outerHTML = slidifyMarkdown( xhr.responseText, section.getAttribute('data-separator'), section.getAttribute('data-vertical'), section.getAttribute('data-notes'), getForwardedAttributes(section) );
} else {
section.outerHTML = '<section data-state="alert">ERROR: The attempt to fetch ' + url + ' failed with the 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 and the Markdown file must be there too.</p></section>';
}
}
};
if( value ) {
result.push( name + '=' + value );
}
else {
result.push( name );
}
}
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);
}
return result.join( ' ' );
} else if( section.getAttribute('data-separator') ) {
};
var markdown = stripLeadingWhitespace(section);
section.outerHTML = slidifyMarkdown( markdown, section.getAttribute('data-separator'), section.getAttribute('data-vertical'), section.getAttribute('data-notes'), getForwardedAttributes(section) );
var slidifyMarkdown = function( markdown, separator, vertical, notes, attributes ) {
}
}
separator = separator || '^\n---\n$';
notes = notes || 'note:';
};
var separatorRegex = new RegExp( separator + ( vertical ? '|' + vertical : '' ), 'mg' ),
horizontalSeparatorRegex = new RegExp( separator ),
notesSeparatorRegex = new RegExp( notes, 'mgi' ),
matches,
noteMatch,
lastIndex = 0,
isHorizontal,
wasHorizontal = true,
content,
asideContent,
slide,
sectionStack = [],
markdownSections = '';
// iterate until all blocks between separators are stacked up
while( matches = separatorRegex.exec( markdown ) ) {
asideContent = null;
var queryMarkdownSlides = function() {
// determine direction (horizontal by default)
isHorizontal = horizontalSeparatorRegex.test( matches[0] );
var sections = document.querySelectorAll( '[data-markdown]');
if( !isHorizontal && wasHorizontal ) {
// create vertical stack
sectionStack.push( [] );
}
for( var j = 0, jlen = sections.length; j < jlen; j++ ) {
// pluck slide content from markdown input
content = markdown.substring( lastIndex, matches.index );
noteMatch = content.split( notesSeparatorRegex );
makeHtml(sections[j]);
if( noteMatch.length === 2 ) {
content = noteMatch[0];
asideContent = noteMatch[1].trim();
}
}
slide = {
content: content,
asideContent: asideContent || ''
};
};
if( isHorizontal && wasHorizontal ) {
// add to horizontal stack
sectionStack.push(slide);
} else {
// add to vertical stack
sectionStack[sectionStack.length-1].push(slide);
}
var makeHtml = function(section) {
lastIndex = separatorRegex.lastIndex;
wasHorizontal = isHorizontal;
}
var notes = section.querySelector( 'aside.notes' );
// add the remaining slide
(wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1]).push(markdown.substring(lastIndex));
var markdown = stripLeadingWhitespace(section);
// flatten the hierarchical stack, and insert <section data-markdown> tags
for( var k = 0, klen = sectionStack.length; k < klen; k++ ) {
// vertical
if( sectionStack[k].propertyIsEnumerable( length ) && typeof sectionStack[k].splice === 'function' ) {
markdownSections += '<section '+ attributes +'>' +
'<section data-markdown>' + sectionStack[k].map( twrap ).join( '</section><section data-markdown>' ) + '</section>' +
'</section>';
} else {
markdownSections += '<section '+ attributes +' data-markdown>' + twrap( sectionStack[k] ) + '</section>';
}
}
section.innerHTML = marked(markdown);
return markdownSections;
};
if( notes ) {
section.appendChild( notes );
}
var queryExternalMarkdown = function() {
};
var sections = document.querySelectorAll( '[data-markdown]'),
section;
querySlidingMarkdown();
for( var j = 0, jlen = sections.length; j < jlen; j++ ) {
queryMarkdownSlides();
section = sections[j];
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 = slidifyMarkdown( xhr.responseText, section.getAttribute( 'data-separator' ), section.getAttribute( 'data-vertical' ), section.getAttribute( 'data-notes' ), getForwardedAttributes( section ) );
}
else {
section.outerHTML = '<section data-state="alert">ERROR: The attempt to fetch ' + url + ' failed with the 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 and the Markdown file must be there too.</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' ) ) {
var markdown = stripLeadingWhitespace( section );
section.outerHTML = slidifyMarkdown( markdown, section.getAttribute( 'data-separator' ), section.getAttribute( 'data-vertical' ), section.getAttribute( 'data-notes' ), getForwardedAttributes( section ) );
}
}
};
var queryMarkdownSlides = function() {
var sections = document.querySelectorAll( '[data-markdown]');
for( var j = 0, jlen = sections.length; j < jlen; j++ ) {
makeHtml( sections[j] );
}
};
var makeHtml = function( section ) {
var notes = section.querySelector( 'aside.notes' );
var markdown = stripLeadingWhitespace( section );
section.innerHTML = marked( markdown );
if( notes ) {
section.appendChild( notes );
}
};
queryExternalMarkdown();
queryMarkdownSlides();
})();

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