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@ -17,8 +17,11 @@ var Reveal = (function(){ |
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// Configurations defaults, can be overridden at initialization time
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// Configurations defaults, can be overridden at initialization time
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config = { |
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config = { |
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// The "normal" size of the presentation, aspect ratio will be preserved
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// when the presentation is scaled to fit different resolutions
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width: 1024, |
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width: 1024, |
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height: 768, |
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height: 768, |
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padding: 0.1, |
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padding: 0.1, |
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// Display controls in the bottom right corner
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// Display controls in the bottom right corner
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@ -552,16 +555,49 @@ var Reveal = (function(){ |
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*/ |
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*/ |
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function layout() { |
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function layout() { |
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dom.slides.style.width = config.width + 'px'; |
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// Available space to scale within
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dom.slides.style.height = config.height + 'px'; |
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var availableWidth = dom.wrapper.offsetWidth, |
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availableHeight = dom.wrapper.offsetHeight; |
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// Dimensions of the content
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var slideWidth = config.width, |
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slideHeight = config.height; |
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// Slide width may be a percentage of available width
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if( typeof slideWidth === 'string' && /%$/.test( slideWidth ) ) { |
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slideWidth = parseInt( slideWidth, 10 ) / 100 * availableWidth; |
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} |
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// Slide height may be a percentage of available height
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if( typeof slideHeight === 'string' && /%$/.test( slideHeight ) ) { |
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slideHeight = parseInt( slideHeight, 10 ) / 100 * availableHeight; |
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} |
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var availableWidth = window.innerWidth - ( window.innerWidth * config.padding * 2 ), |
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dom.slides.style.width = slideWidth + 'px'; |
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availableHeight = window.innerHeight - ( window.innerHeight * config.padding * 2 ); |
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dom.slides.style.height = slideHeight + 'px'; |
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var scale = Math.min( availableWidth / config.width, availableHeight / config.height ); |
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// Reduce availabe space by padding
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availableWidth = availableWidth - ( availableHeight * config.padding * 2 ); |
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availableHeight = availableHeight - ( availableHeight * config.padding * 2 ); |
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// dom.slides.style.WebkitTransform = 'translate(-50%, -50%) scale('+ scale +') translate(50%, 50%)';
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// Determine scale of content to fit within available space
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dom.slides.style.zoom = scale; |
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var scale = Math.min( availableWidth / slideWidth, availableHeight / slideHeight ); |
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// Prefer applying scale via zoom since Chrome blurs scaled content
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// with nested transforms
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if( typeof dom.slides.style.zoom !== 'undefined' ) { |
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dom.slides.style.zoom = scale; |
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} |
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// Apply scale transform as a fallback
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else { |
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var transform = 'translate(-50%, -50%) scale('+ scale +') translate(50%, 50%)'; |
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dom.slides.style.WebkitTransform = transform; |
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dom.slides.style.MozTransform = transform; |
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dom.slides.style.msTransform = transform; |
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dom.slides.style.OTransform = transform; |
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dom.slides.style.transform = transform; |
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} |
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if( config.center ) { |
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if( config.center ) { |
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@ -569,7 +605,7 @@ var Reveal = (function(){ |
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var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) ); |
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var slides = toArray( document.querySelectorAll( SLIDES_SELECTOR ) ); |
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// Determine the minimum top offset for slides
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// Determine the minimum top offset for slides
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var minTop = -dom.wrapper.offsetHeight / 2; |
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var minTop = -slideHeight / 2; |
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for( var i = 0, len = slides.length; i < len; i++ ) { |
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for( var i = 0, len = slides.length; i < len; i++ ) { |
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var slide = slides[ i ]; |
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var slide = slides[ i ]; |
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