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Merge branch 'feature/print' into dev

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Hakim El Hattab 2014-04-26 18:21:39 +02:00
commit b019604531
4 changed files with 137 additions and 75 deletions
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2
README.md
View file

@ -585,7 +585,7 @@ Limitations:
Presentations can be exported to PDF via a special print stylesheet. This feature requires that you use [Google Chrome](http://google.com/chrome).
Here's an example of an exported presentation that's been uploaded to SlideShare: http://www.slideshare.net/hakimel/revealjs-13872948.
1. Open your presentation with [css/print/pdf.css](https://github.com/hakimel/reveal.js/blob/master/css/print/pdf.css) included on the page. The default index HTML lets you add *print-pdf* anywhere in the query to include the stylesheet, for example: [lab.hakim.se/reveal-js?print-pdf](http://lab.hakim.se/reveal-js?print-pdf).
1. Open your presentation with `print-pdf` included anywhere in the query string. This triggers the default index HTML to load the PDF print stylesheet ([css/print/pdf.css](https://github.com/hakimel/reveal.js/blob/master/css/print/pdf.css)). You can test this with [lab.hakim.se/reveal-js?print-pdf](http://lab.hakim.se/reveal-js?print-pdf).
2. Open the in-browser print dialog (CMD+P).
3. Change the **Destination** setting to **Save as PDF**.
4. Change the **Layout** to **Landscape**.

58
css/print/pdf.css
View file

@ -17,8 +17,6 @@
body {
font-size: 18pt;
width: 297mm;
height: 229mm;
margin: 0 auto !important;
border: 0;
padding: 0;
@ -105,8 +103,6 @@ ul, ol, div, p {
overflow: visible;
display: block;
text-align: center;
-webkit-perspective: none;
-moz-perspective: none;
-ms-perspective: none;
@ -118,21 +114,15 @@ ul, ol, div, p {
perspective-origin: 50% 50%;
}
.reveal .slides section {
page-break-after: always !important;
visibility: visible !important;
position: relative !important;
width: 100% !important;
height: 229mm !important;
min-height: 229mm !important;
display: block !important;
overflow: hidden !important;
position: relative !important;
left: 0 !important;
top: 0 !important;
margin: 0 !important;
padding: 2cm 2cm 0 2cm !important;
padding: 0 !important;
box-sizing: border-box !important;
opacity: 1 !important;
@ -154,30 +144,6 @@ ul, ol, div, p {
height: auto !important;
min-height: auto !important;
}
.reveal .absolute-element {
margin-left: 2.2cm;
margin-top: 1.8cm;
}
.reveal section .fragment {
opacity: 1 !important;
visibility: visible !important;
-webkit-transform: none !important;
-moz-transform: none !important;
-ms-transform: none !important;
transform: none !important;
}
.reveal section .slide-background {
position: absolute;
top: 0;
left: 0;
width: 100%;
z-index: 0;
}
.reveal section>* {
position: relative;
z-index: 1;
}
.reveal img {
box-shadow: none;
}
@ -189,11 +155,17 @@ ul, ol, div, p {
font-size: 16pt !important;
}
.reveal.center .slides section:not(.stack) {
display: flex !important;
flex-direction: column;
align-items: center;
justify-content: center;
padding-top: 2em !important;
padding-bottom: 2em !important;
/* Slide backgrounds are placed inside of their slide when exporting to PDF */
.reveal section .slide-background {
position: absolute;
top: 0;
left: 0;
width: 100%;
z-index: 0;
}
/* All elements should be above the slide-background */
.reveal section>* {
position: relative;
z-index: 1;
}

2
css/reveal.css
View file

@ -1328,6 +1328,8 @@ body {
position: absolute;
width: 100%;
height: 100%;
top: 0;
left: 0;
-webkit-perspective: 600px;
-moz-perspective: 600px;

150
js/reveal.js
View file

@ -333,6 +333,12 @@ var Reveal = (function(){
// Update all backgrounds
updateBackground( true );
// Special setup and config is required when printing to PDF
if( isPrintingPDF() ) {
removeEventListeners();
setupPDF();
}
// Notify listeners that the presentation is ready but use a 1ms
// timeout to ensure it's not fired synchronously after #initialize()
setTimeout( function() {
@ -401,6 +407,74 @@ var Reveal = (function(){
}
/**
* Configures the presentation for printing to a static
* PDF.
*/
function setupPDF() {
// The aspect ratio of pages when saving to PDF in Chrome,
// we need to abide by this ratio when determining the pixel
// size of our pages
var pageAspectRatio = 1.295;
var slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight );
// Dimensions of the PDF pages
var pageWidth = Math.round( slideSize.width * ( 1 + config.margin ) ),
pageHeight = Math.round( pageWidth / pageAspectRatio );
// Dimensions of slides within the pages
var slideWidth = slideSize.width,
slideHeight = slideSize.height;
document.body.classList.add( 'print-pdf' );
document.body.style.width = pageWidth + 'px';
document.body.style.height = pageHeight + 'px';
// Slide and slide background layout
toArray( document.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.ceil( contentHeight / pageHeight );
// 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';
}
}
} );
// Show all fragments
toArray( document.querySelectorAll( SLIDES_SELECTOR + ' .fragment' ) ).forEach( function( fragment ) {
fragment.classList.add( 'visible' );
} );
}
/**
* Creates an HTML element and returns a reference to it.
* If the element already exists the existing instance will
@ -428,9 +502,7 @@ var Reveal = (function(){
*/
function createBackgrounds() {
if( isPrintingPDF() ) {
document.body.classList.add( 'print-pdf' );
}
var printMode = isPrintingPDF();
// Clear prior backgrounds
dom.background.innerHTML = '';
@ -441,7 +513,7 @@ var Reveal = (function(){
var backgroundStack;
if( isPrintingPDF() ) {
if( printMode ) {
backgroundStack = createBackground( slideh, slideh );
}
else {
@ -451,7 +523,7 @@ var Reveal = (function(){
// Iterate over all vertical slides
toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) {
if( isPrintingPDF() ) {
if( printMode ) {
createBackground( slidev, slidev );
}
else {
@ -887,7 +959,7 @@ var Reveal = (function(){
if( typeof child.offsetTop === 'number' && child.style ) {
// Count # of abs children
if( child.style.position === 'absolute' ) {
if( window.getComputedStyle( child ).position === 'absolute' ) {
absoluteChildren += 1;
}
@ -1124,37 +1196,18 @@ var Reveal = (function(){
if( dom.wrapper && !isPrintingPDF() ) {
// Available space to scale within
var availableWidth = dom.wrapper.offsetWidth,
availableHeight = dom.wrapper.offsetHeight;
var size = getComputedSlideSize();
// Reduce available space by margin
availableWidth -= ( availableHeight * config.margin );
availableHeight -= ( availableHeight * config.margin );
// Dimensions of the content
var slideWidth = config.width,
slideHeight = config.height,
slidePadding = 20; // TODO Dig this out of DOM
var slidePadding = 20; // TODO Dig this out of DOM
// Layout the contents of the slides
layoutSlideContents( config.width, config.height, slidePadding );
// Slide width may be a percentage of available width
if( typeof slideWidth === 'string' && /%$/.test( slideWidth ) ) {
slideWidth = parseInt( slideWidth, 10 ) / 100 * availableWidth;
}
// Slide height may be a percentage of available height
if( typeof slideHeight === 'string' && /%$/.test( slideHeight ) ) {
slideHeight = parseInt( slideHeight, 10 ) / 100 * availableHeight;
}
dom.slides.style.width = slideWidth + 'px';
dom.slides.style.height = slideHeight + 'px';
dom.slides.style.width = size.width + 'px';
dom.slides.style.height = size.height + 'px';
// Determine scale of content to fit within available space
scale = Math.min( availableWidth / slideWidth, availableHeight / slideHeight );
scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );
// Respect max/min scale settings
scale = Math.max( scale, config.minScale );
@ -1191,7 +1244,7 @@ var Reveal = (function(){
slide.style.top = 0;
}
else {
slide.style.top = Math.max( ( ( slideHeight - getAbsoluteHeight( slide ) ) / 2 ) - slidePadding, 0 ) + 'px';
slide.style.top = Math.max( ( ( size.height - getAbsoluteHeight( slide ) ) / 2 ) - slidePadding, 0 ) + 'px';
}
}
else {
@ -1239,6 +1292,41 @@ var Reveal = (function(){
}
/**
* Calculates the computed pixel size of our slides. These
* values are based on the width and height configuration
* options.
*/
function getComputedSlideSize( presentationWidth, presentationHeight ) {
var size = {
// Slide size
width: config.width,
height: config.height,
// Presentation size
presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
presentationHeight: presentationHeight || dom.wrapper.offsetHeight
};
// Reduce available space by margin
size.presentationWidth -= ( size.presentationHeight * config.margin );
size.presentationHeight -= ( size.presentationHeight * config.margin );
// Slide width may be a percentage of available width
if( typeof size.width === 'string' && /%$/.test( size.width ) ) {
size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;
}
// Slide height may be a percentage of available height
if( typeof size.height === 'string' && /%$/.test( size.height ) ) {
size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;
}
return size;
}
/**
* Stores the vertical index of a stack so that the same
* vertical slide can be selected when navigating to and