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scale presentations on ipad instead of zoom

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This commit is contained in:
Hakim El Hattab 2013-02-11 12:09:14 -05:00
parent 24c493fb83
commit 7ee4e0ba66
2 changed files with 62 additions and 58 deletions
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116
js/reveal.js
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@ -552,78 +552,82 @@ var Reveal = (function(){
*/
function layout() {
// Available space to scale within
var availableWidth = dom.wrapper.offsetWidth,
availableHeight = dom.wrapper.offsetHeight;
if( dom.wrapper ) {
// Reduce availabe space by margin
availableWidth -= ( availableHeight * config.margin );
availableHeight -= ( availableHeight * config.margin );
// Available space to scale within
var availableWidth = dom.wrapper.offsetWidth,
availableHeight = dom.wrapper.offsetHeight;
// Dimensions of the content
var slideWidth = config.width,
slideHeight = config.height;
// Reduce availabe space by margin
availableWidth -= ( availableHeight * config.margin );
availableHeight -= ( availableHeight * config.margin );
// Slide width may be a percentage of available width
if( typeof slideWidth === 'string' && /%$/.test( slideWidth ) ) {
slideWidth = parseInt( slideWidth, 10 ) / 100 * availableWidth;
}
// Dimensions of the content
var slideWidth = config.width,
slideHeight = config.height;
// Slide height may be a percentage of available height
if( typeof slideHeight === 'string' && /%$/.test( slideHeight ) ) {
slideHeight = parseInt( slideHeight, 10 ) / 100 * availableHeight;
}
// Slide width may be a percentage of available width
if( typeof slideWidth === 'string' && /%$/.test( slideWidth ) ) {
slideWidth = parseInt( slideWidth, 10 ) / 100 * availableWidth;
}
dom.slides.style.width = slideWidth + 'px';
dom.slides.style.height = slideHeight + 'px';
// Slide height may be a percentage of available height
if( typeof slideHeight === 'string' && /%$/.test( slideHeight ) ) {
slideHeight = parseInt( slideHeight, 10 ) / 100 * availableHeight;
}
// Determine scale of content to fit within available space
scale = Math.min( availableWidth / slideWidth, availableHeight / slideHeight );
dom.slides.style.width = slideWidth + 'px';
dom.slides.style.height = slideHeight + 'px';
// Respect max/min scale settings
scale = Math.max( scale, config.minScale );
scale = Math.min( scale, config.maxScale );
// Determine scale of content to fit within available space
scale = Math.min( availableWidth / slideWidth, availableHeight / slideHeight );
// Prefer applying scale via zoom since Chrome blurs scaled content
// with nested transforms
if( typeof dom.slides.style.zoom !== 'undefined' && !navigator.userAgent.match( /(iphone|ipod|android)/gi ) ) {
dom.slides.style.zoom = scale;
}
// Apply scale transform as a fallback
else {
var transform = 'translate(-50%, -50%) scale('+ scale +') translate(50%, 50%)';
// Respect max/min scale settings
scale = Math.max( scale, config.minScale );
scale = Math.min( scale, config.maxScale );
dom.slides.style.WebkitTransform = transform;
dom.slides.style.MozTransform = transform;
dom.slides.style.msTransform = transform;
dom.slides.style.OTransform = transform;
dom.slides.style.transform = transform;
}
// Prefer applying scale via zoom since Chrome blurs scaled content
// with nested transforms
if( typeof dom.slides.style.zoom !== 'undefined' && !navigator.userAgent.match( /(iphone|ipod|ipad|android)/gi ) ) {
dom.slides.style.zoom = scale;
}
// Apply scale transform as a fallback
else {
var transform = 'translate(-50%, -50%) scale('+ scale +') translate(50%, 50%)';
if( config.center ) {
dom.slides.style.WebkitTransform = transform;
dom.slides.style.MozTransform = transform;
dom.slides.style.msTransform = transform;
dom.slides.style.OTransform = transform;
dom.slides.style.transform = transform;
}
// Select all slides, vertical and horizontal
var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) );
if( config.center ) {
// Determine the minimum top offset for slides
var minTop = -slideHeight / 2;
// Select all slides, vertical and horizontal
var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) );
for( var i = 0, len = slides.length; i < len; i++ ) {
var slide = slides[ i ];
// Determine the minimum top offset for slides
var minTop = -slideHeight / 2;
// Don't bother updating invisible slides
if( slide.style.display === 'none' ) {
continue;
for( var i = 0, len = slides.length; i < len; i++ ) {
var slide = slides[ i ];
// Don't bother updating invisible slides
if( slide.style.display === 'none' ) {
continue;
}
// Vertical stacks are not centered since their section
// children will be
if( slide.classList.contains( 'stack' ) ) {
slide.style.top = 0;
}
else {
slide.style.top = Math.max( - ( slide.offsetHeight / 2 ) - 20, minTop ) + 'px';
}
}
// Vertical stacks are not centered since their section
// children will be
if( slide.classList.contains( 'stack' ) ) {
slide.style.top = 0;
}
else {
slide.style.top = Math.max( - ( slide.offsetHeight / 2 ) - 20, minTop ) + 'px';
}
}
}

4
js/reveal.min.js vendored
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