toArray()

in js/reveal.js [559:620]
45 lines of code
9 McCabe index (conditional complexity)

		toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {

			// Vertical stacks are not centred since their section
			// children will be
			if( slide.classList.contains( 'stack' ) === false ) {
				// Center the slide inside of the page, giving the slide some margin
				var left = ( pageWidth - slideWidth ) / 2,
					top = ( pageHeight - slideHeight ) / 2;

				var contentHeight = getAbsoluteHeight( slide );
				var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );

				// Center slides vertically
				if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
					top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
				}

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

				// TODO Backgrounds need to be multiplied when the slide
				// stretches over multiple pages
				var background = slide.querySelector( '.slide-background' );
				if( background ) {
					background.style.width = pageWidth + 'px';
					background.style.height = ( pageHeight * numberOfPages ) + 'px';
					background.style.top = -top + 'px';
					background.style.left = -left + 'px';
				}

				// Inject notes if `showNotes` is enabled
				if( config.showNotes ) {
					var notes = getSlideNotes( slide );
					if( notes ) {
						var notesSpacing = 8;
						var notesElement = document.createElement( 'div' );
						notesElement.classList.add( 'speaker-notes' );
						notesElement.classList.add( 'speaker-notes-pdf' );
						notesElement.innerHTML = notes;
						notesElement.style.left = ( notesSpacing - left ) + 'px';
						notesElement.style.bottom = ( notesSpacing - top ) + 'px';
						notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
						slide.appendChild( notesElement );
					}
				}

				// Inject slide numbers if `slideNumbers` are enabled
				if( config.slideNumber ) {
					var slideNumberH = parseInt( slide.getAttribute( 'data-index-h' ), 10 ) + 1,
						slideNumberV = parseInt( slide.getAttribute( 'data-index-v' ), 10 ) + 1;

					var numberElement = document.createElement( 'div' );
					numberElement.classList.add( 'slide-number' );
					numberElement.classList.add( 'slide-number-pdf' );
					numberElement.innerHTML = formatSlideNumber( slideNumberH, '.', slideNumberV );
					background.appendChild( numberElement );
				}
			}

		} );