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@@ -136,11 +136,8 @@ var Reveal = (function(){
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// Cached references to DOM elements
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dom = {},
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- // Client support for CSS 3D transforms, see #checkCapabilities()
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- supports3DTransforms,
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-
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- // Client support for CSS 2D transforms, see #checkCapabilities()
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- supports2DTransforms,
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+ // Features supported by the browser, see #checkCapabilities()
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+ features = {},
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// Client is a mobile device, see #checkCapabilities()
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isMobileDevice,
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@@ -183,7 +180,7 @@ var Reveal = (function(){
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checkCapabilities();
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- if( !supports2DTransforms && !supports3DTransforms ) {
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+ if( !features.transforms2d && !features.transforms3d ) {
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document.body.setAttribute( 'class', 'no-transforms' );
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// If the browser doesn't support core features we won't be
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@@ -212,18 +209,22 @@ var Reveal = (function(){
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*/
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function checkCapabilities() {
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- supports3DTransforms = 'WebkitPerspective' in document.body.style ||
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+ features.transforms3d = 'WebkitPerspective' in document.body.style ||
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'MozPerspective' in document.body.style ||
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'msPerspective' in document.body.style ||
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'OPerspective' in document.body.style ||
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'perspective' in document.body.style;
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- supports2DTransforms = 'WebkitTransform' in document.body.style ||
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+ features.transforms2d = 'WebkitTransform' in document.body.style ||
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'MozTransform' in document.body.style ||
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'msTransform' in document.body.style ||
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'OTransform' in document.body.style ||
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'transform' in document.body.style;
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+ features.requestAnimationFrame = typeof window.requestAnimationFrame === 'function';
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+
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+ features.canvas = !!document.createElement( 'canvas' ).getContext;
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+
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isMobileDevice = navigator.userAgent.match( /(iphone|ipod|android)/gi );
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}
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@@ -523,7 +524,7 @@ var Reveal = (function(){
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if( typeof options === 'object' ) extend( config, options );
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// Force linear transition based on browser capabilities
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- if( supports3DTransforms === false ) config.transition = 'linear';
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+ if( features.transforms3d === false ) config.transition = 'linear';
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dom.wrapper.classList.add( config.transition );
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@@ -886,7 +887,7 @@ var Reveal = (function(){
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*/
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function enableRollingLinks() {
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- if( supports3DTransforms && !( 'msPerspective' in document.body.style ) ) {
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+ if( features.transforms3d && !( 'msPerspective' in document.body.style ) ) {
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var anchors = document.querySelectorAll( SLIDES_SELECTOR + ' a:not(.image)' );
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for( var i = 0, len = anchors.length; i < len; i++ ) {
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@@ -2472,7 +2473,7 @@ var Reveal = (function(){
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event.preventDefault();
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}
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// ESC or O key
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- else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && supports3DTransforms ) {
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+ else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && features.transforms3d ) {
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if( dom.preview ) {
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closePreview();
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}
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