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share/revealjs/js/controllers/print.js  view on Meta::CPAN

				page.className = 'pdf-page';
				page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';

				// Copy the presentation-wide background to each individual
				// page when printing
				if( presentationBackground ) {
					page.style.background = presentationBackground;
				}

				page.appendChild( slide );

				// Position the slide inside of the page
				slide.style.left = left + 'px';
				slide.style.top = top + 'px';
				slide.style.width = slideWidth + 'px';

				this.Reveal.slideContent.layout( slide );

				if( slide.slideBackgroundElement ) {
					page.insertBefore( slide.slideBackgroundElement, slide );
				}

				// Inject notes if `showNotes` is enabled
				if( config.showNotes ) {

					// Are there notes for this slide?
					const notes = this.Reveal.getSlideNotes( slide );
					if( notes ) {

						const notesSpacing = 8;
						const notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
						const notesElement = document.createElement( 'div' );
						notesElement.classList.add( 'speaker-notes' );
						notesElement.classList.add( 'speaker-notes-pdf' );
						notesElement.setAttribute( 'data-layout', notesLayout );
						notesElement.innerHTML = notes;

						if( notesLayout === 'separate-page' ) {
							pages.push( notesElement );
						}
						else {
							notesElement.style.left = notesSpacing + 'px';
							notesElement.style.bottom = notesSpacing + 'px';
							notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
							page.appendChild( notesElement );
						}

					}

				}

				// Inject page numbers if `slideNumbers` are enabled
				if( injectPageNumbers ) {
					const numberElement = document.createElement( 'div' );
					numberElement.classList.add( 'slide-number' );
					numberElement.classList.add( 'slide-number-pdf' );
					numberElement.innerHTML = slideNumber++;
					page.appendChild( numberElement );
				}

				// Copy page and show fragments one after another
				if( config.pdfSeparateFragments ) {

					// Each fragment 'group' is an array containing one or more
					// fragments. Multiple fragments that appear at the same time
					// are part of the same group.
					const fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );

					let previousFragmentStep;

					fragmentGroups.forEach( function( fragments, index ) {

						// Remove 'current-fragment' from the previous group
						if( previousFragmentStep ) {
							previousFragmentStep.forEach( function( fragment ) {
								fragment.classList.remove( 'current-fragment' );
							} );
						}

						// Show the fragments for the current index
						fragments.forEach( function( fragment ) {
							fragment.classList.add( 'visible', 'current-fragment' );
						}, this );

						// Create a separate page for the current fragment state
						const clonedPage = page.cloneNode( true );

						// Inject unique page numbers for fragments
						if( injectPageNumbers ) {
							const numberElement = clonedPage.querySelector( '.slide-number-pdf' );
							const fragmentNumber = index + 1;
							numberElement.innerHTML += '.' + fragmentNumber;
						}

						pages.push( clonedPage );

						previousFragmentStep = fragments;

					}, this );

					// Reset the first/original page so that all fragments are hidden
					fragmentGroups.forEach( function( fragments ) {
						fragments.forEach( function( fragment ) {
							fragment.classList.remove( 'visible', 'current-fragment' );
						} );
					} );

				}
				// Show all fragments
				else {
					queryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {
						fragment.classList.add( 'visible' );
					} );
				}

			}

		}, this );

		await new Promise( requestAnimationFrame );

		pages.forEach( page => pageContainer.appendChild( page ) );

		// Re-run JS-based content layout after the slide is added to page DOM
		this.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );

		// Notify subscribers that the PDF layout is good to go
		this.Reveal.dispatchEvent({ type: 'pdf-ready' });

	}

	/**
	 * Checks if this instance is being used to print a PDF.
	 */
	isPrintingPDF() {

		return ( /print-pdf/gi ).test( window.location.search );

	}

}