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allow tall slides to spread over pages in pdf export

edit
Hakim El Hattab 2014-04-26 08:26:20 +02:00
parent a49a78c454
commit 3adaed2a1e
1 changed files with 15 additions and 7 deletions
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22
js/reveal.js
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@ -430,22 +430,30 @@ var Reveal = (function(){
// Vertical stacks are not centred since their section // Vertical stacks are not centred since their section
// children will be // children will be
if( slide.classList.contains( 'stack' ) === false ) { if( slide.classList.contains( 'stack' ) === false ) {
// Center the slide inside of the page, giving the slide some margin
var left = ( pageWidth - slideWidth ) / 2, var left = ( pageWidth - slideWidth ) / 2,
top = ( pageHeight - slideHeight ) / 2; top = ( pageHeight - slideHeight ) / 2;
if( config.center || slide.classList.contains( 'center' ) ) { var contentHeight = getAbsoluteHeight( slide );
top = Math.max( ( pageHeight - getAbsoluteHeight( slide ) ) / 2, 0 ); var numberOfPages = Math.ceil( contentHeight / slideHeight );
// Top align when we're taller than a single page
if( numberOfPages > 1 ) {
top = 0;
}
// Center the slide vertically
else if( 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.left = left + 'px';
slide.style.top = top + 'px'; slide.style.top = top + 'px';
slide.style.width = slideWidth + 'px'; slide.style.width = slideWidth + 'px';
slide.style.height = slideHeight + 'px'; slide.style.height = ( slideHeight * numberOfPages ) + 'px';
if( slide.scrollHeight > slideHeight ) {
slide.style.overflow = 'hidden';
}
// TODO Backgrounds need to be multiplied when the slide
// stretches over multiple pages
var background = slide.querySelector( '.slide-background' ); var background = slide.querySelector( '.slide-background' );
if( background ) { if( background ) {
background.style.width = pageWidth + 'px'; background.style.width = pageWidth + 'px';