/**

* Extras Plugin

*

* This plugin performs initialization (like calling mermaid.initialize())

* for the extras/ plugins if they are loaded into a presentation.

*

* See README.md for details.

*

* Copyright 2016 Henrik Ingo (@henrikingo)

* Released under the MIT license.

*/

/* global markdown, hljs, mermaid, impress, document, window */

( function( document, window ) {

"use strict";

var preInit = function() {

if ( window.markdown ) {

// Unlike the other extras, Markdown.js doesn't by default do anything in

// particular. We do it ourselves here.

// In addition, we use "-----" as a delimiter for new slide.

// Query all .markdown elements and translate to HTML

var markdownDivs = document.querySelectorAll( ".markdown" );

for ( var idx = 0; idx < markdownDivs.length; idx++ ) {

var element = markdownDivs[ idx ];

var slides = element.textContent.split( /^-----$/m );

var i = slides.length - 1;

element.innerHTML = markdown.toHTML( slides[ i ] );

// If there's an id, unset it for last, and all other, elements,

// and then set it for the first.

var id = null;

if ( element.id ) {

id = element.id;

element.id = "";

}

i--;

while ( i >= 0 ) {

var newElement = element.cloneNode( false );

newElement.innerHTML = markdown.toHTML( slides[ i ] );

element.parentNode.insertBefore( newElement, element );

element = newElement;

i--;

}

if ( id !== null ) {

element.id = id;

}

}

} // Markdown

if ( window.hljs ) {

hljs.initHighlightingOnLoad();

}

if ( window.mermaid ) {

mermaid.initialize( { startOnLoad:true } );

}

};

// Register the plugin to be called in pre-init phase

// Note: Markdown.js should run early/first, because it creates new div elements.

// So add this with a lower-than-default weight.

impress.addPreInitPlugin( preInit, 1 );

} )( document, window );