109 lines
2.9 KiB
JavaScript
109 lines
2.9 KiB
JavaScript
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var PdfExport = ( function( _Reveal ){
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var Reveal = _Reveal;
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var setStylesheet = null;
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var installAltKeyBindings = null;
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function getRevealJsPath(){
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var regex = /\b[^/]+\/reveal.css$/i;
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var script = Array.from( document.querySelectorAll( 'link' ) ).find( function( e ){
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return e.attributes.href && e.attributes.href.value.search( regex ) >= 0;
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});
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if( !script ){
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console.error( 'reveal.css could not be found in included <link> elements. Did you rename this file?' );
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return '';
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}
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return script.attributes.href.value.replace( regex, '' );
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}
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function setStylesheet3( pdfExport ){
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var link = document.querySelector( '#print' );
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if( !link ){
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link = document.createElement( 'link' );
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link.rel = 'stylesheet';
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link.id = 'print';
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document.querySelector( 'head' ).appendChild( link );
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}
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var style = 'paper';
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if( pdfExport ){
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style = 'pdf';
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}
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link.href = getRevealJsPath() + 'css/print/' + style + '.css';
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}
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function setStylesheet4( pdfExport ){
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}
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function installAltKeyBindings3(){
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}
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function installAltKeyBindings4(){
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if( isPrintingPDF() ){
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var config = Reveal.getConfig();
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var shortcut = config.pdfExportShortcut || 'E';
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window.addEventListener( 'keydown', function( e ){
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if( e.target.nodeName.toUpperCase() == 'BODY'
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&& ( e.key.toUpperCase() == shortcut.toUpperCase() || e.keyCode == shortcut.toUpperCase().charCodeAt( 0 ) ) ){
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e.preventDefault();
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togglePdfExport();
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return false;
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}
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}, true );
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}
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}
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function isPrintingPDF(){
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return ( /print-pdf/gi ).test( window.location.search );
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}
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function togglePdfExport(){
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var url_doc = new URL( document.URL );
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var query_doc = new URLSearchParams( url_doc.searchParams );
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if( isPrintingPDF() ){
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query_doc.delete( 'print-pdf' );
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}else{
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query_doc.set( 'print-pdf', '' );
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}
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url_doc.search = ( query_doc.toString() ? '?' + query_doc.toString() : '' );
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window.location.href = url_doc.toString();
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}
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function installKeyBindings(){
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var config = Reveal.getConfig();
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var shortcut = config.pdfExportShortcut || 'E';
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Reveal.addKeyBinding({
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keyCode: shortcut.toUpperCase().charCodeAt( 0 ),
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key: shortcut.toUpperCase(),
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description: 'PDF export mode'
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}, togglePdfExport );
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installAltKeyBindings();
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}
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function install(){
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installKeyBindings();
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setStylesheet( isPrintingPDF() );
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}
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var Plugin = {
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}
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if( Reveal && Reveal.VERSION && Reveal.VERSION.length && Reveal.VERSION[ 0 ] == '3' ){
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// reveal 3.x
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setStylesheet = setStylesheet3;
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installAltKeyBindings = installAltKeyBindings3;
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install();
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}else{
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// must be reveal 4.x
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setStylesheet = setStylesheet4;
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installAltKeyBindings = installAltKeyBindings4;
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Plugin.id = 'pdf-export';
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Plugin.init = function( _Reveal ){
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Reveal = _Reveal;
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install();
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};
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}
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return Plugin;
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})( Reveal );
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