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make max pages per slide limit configurable

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Hakim El Hattab 2016-04-28 11:31:11 +02:00
parent fcb6ea8385
commit 5558103522
2 changed files with 9 additions and 0 deletions
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2
README.md
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@ -783,6 +783,8 @@ Reveal.initialize({
Presentations can be exported to PDF via a special print stylesheet. This feature requires that you use [Google Chrome](http://google.com/chrome) or [Chromium](https://www.chromium.org/Home). Presentations can be exported to PDF via a special print stylesheet. This feature requires that you use [Google Chrome](http://google.com/chrome) or [Chromium](https://www.chromium.org/Home).
Here's an example of an exported presentation that's been uploaded to SlideShare: http://www.slideshare.net/hakimel/revealjs-300. Here's an example of an exported presentation that's been uploaded to SlideShare: http://www.slideshare.net/hakimel/revealjs-300.
Export dimensions are inferred from the configured [presentation size](#presentation-size). Slides that are too tall to fit within a single page will expand onto multiple pages. You can limit how many pages a slide may expand onto using the `pdfMaxPagesPerSlide` config option, for example: `Reveal.configure({ pdfMaxPagesPerSlide: 1 })`.
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). 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 (CTRL/CMD+P). 2. Open the in-browser print dialog (CTRL/CMD+P).
3. Change the **Destination** setting to **Save as PDF**. 3. Change the **Destination** setting to **Save as PDF**.

7
js/reveal.js
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@ -153,6 +153,10 @@
parallaxBackgroundHorizontal: null, parallaxBackgroundHorizontal: null,
parallaxBackgroundVertical: null, parallaxBackgroundVertical: null,
// The maximum number of pages a single slide can expand onto when printing
// to PDF, unlimited by default
pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
// Number of slides away from the current that are visible // Number of slides away from the current that are visible
viewDistance: 3, viewDistance: 3,
@ -592,6 +596,9 @@
var contentHeight = slide.scrollHeight; var contentHeight = slide.scrollHeight;
var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 ); var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
// Adhere to configured pages per slide limit
numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
// Center slides vertically // Center slides vertically
if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) { if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
top = Math.max( ( pageHeight - contentHeight ) / 2, 0 ); top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );