Initial release

LICENSE

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 MIT License
 
-Copyright (c) 2018 Sören Weber
+Copyright (c) 2018 Sören Weber, https://soeren-weber.de
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

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+# PdfExport
+
+A [reveal.js](https://github.com/hakimel/reveal.js/) plugin to easly switch between screen and the built-in PDF export mode.
+
+## Installation
+
+Copy this repository into the plugins folder of your reveal.js presentation, ie ```plugin/pdfexport```.
+
+Add the plugin to the dependencies in your presentation, as below.
+
+```javascript
+Reveal.initialize({
+	// ...
+	dependencies: [
+		// ...
+		{ src: 'plugin/pdfexport/pdfexport.js', async: true },
+	]
+});
+```
+
+You need to remove all of the following or similar lines from your presentation. Paper or PDF stylesheets will be set by the plugin.
+
+```html
+<!-- Printing and PDF exports -->
+<script>
+	var link = document.createElement( 'link' );
+	link.rel = 'stylesheet';
+	link.type = 'text/css';
+	link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
+	document.getElementsByTagName( 'head' )[0].appendChild( link );
+</script>
+```
+
+## Usage
+
+To toggle between screen and PDF mode you can press the ```E``` shortcut on the keyboard.
+
+### Parameter
+
+```javascript
+Reveal.initialize({
+	// ...
+
+	// Shortcut for toggling between screen and PDF mode
+	pdfExportShortcut: 'E',
+});
+```
+
+## License
+
+[MIT licensed](https://en.wikipedia.org/wiki/MIT_License).
+
+Copyright (C) 2018 [Sören Weber](https://soeren-weber.de)

pdfexport.js

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+var PdfExport = ( function( Reveal ){
+
+	var defMode = false;
+
+	function getRevealJsPath(){
+		var regex = /\/js\/reveal.js$/i;
+		var script = Array.from( document.querySelectorAll( 'script' ) ).find( function( e ){
+			return e.attributes.src && e.attributes.src.value.search( regex ) >= 0;
+		});
+		if( !script ){
+			console.error( 'reveal.js script could not be found in included <script> elements. Did you rename this file?' );
+			return '';
+		}
+		return script.attributes.src.value.replace( regex, '' );
+	}
+
+	function setStylesheet( pdf ){
+		var link = document.querySelector( '#print' );
+		if( !link ){
+			link = document.createElement( 'link' );
+			link.rel = 'stylesheet';
+			link.id = 'print';
+			document.querySelector( 'head' ).appendChild( link );
+		}
+		var style = 'paper';
+		if( pdf ){
+			style = 'pdf';
+		}
+		link.href = getRevealJsPath() + '/css/print/' + style + '.css';
+	}
+
+	function setPdfExport( pdfExport ){
+		var config = Reveal.getConfig();
+		pdfExport = pdfExport !== null ? pdfExport : config.pdfExport !== undefined ? !!config.pdfExport : defMode;
+		setStylesheet( pdfExport );
+	}
+
+	function isPrintingPDF(){
+		return ( /print-pdf/gi ).test( window.location.search );
+	}
+
+	function togglePdfExport(){
+		var url_doc = new URL( document.URL );
+		var query_doc = new URLSearchParams( url_doc.searchParams );
+		if( isPrintingPDF() ){
+			query_doc.delete( 'print-pdf' );
+		}else{
+			query_doc.set( 'print-pdf', '' );
+		}
+		url_doc.search = ( query_doc.toString() ? '?' + query_doc.toString() : '' );
+		window.location.href = url_doc.toString();
+	}
+
+	function applyPdfExportParameter(){
+		setPdfExport( isPrintingPDF() );
+	}
+
+	function installKeyBindings(){
+		var config = Reveal.getConfig();
+		var shortcut = config.pdfExportShortcut || 'E';
+		var keyboard = {};
+		keyboard[ shortcut.toUpperCase().charCodeAt( 0 ) ] = togglePdfExport;
+
+		Reveal.registerKeyboardShortcut( shortcut, 'PDF export mode' );
+		Reveal.configure({
+			keyboard: keyboard
+		});
+	}
+
+	function install(){
+		installKeyBindings();
+		applyPdfExportParameter();
+	}
+
+	install();
+
+	return {
+	};
+
+})( Reveal );