From 8ad81aa1a5fc99f6f70d30e1a7396492e4ff3335 Mon Sep 17 00:00:00 2001 From: Hakim El Hattab Date: Sat, 10 Aug 2013 13:10:48 -0400 Subject: [PATCH] delay client capability test until initialization phase --- js/reveal.js | 47 ++++++++++++++++++++++++++++++++--------------- js/reveal.min.js | 4 ++-- 2 files changed, 34 insertions(+), 17 deletions(-) diff --git a/js/reveal.js b/js/reveal.js index d86c22c0..1503c060 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -14,8 +14,6 @@ var Reveal = (function(){ VERTICAL_SLIDES_SELECTOR = '.reveal .slides>section.present>section', HOME_SLIDE_SELECTOR = '.reveal .slides>section:first-child', - IS_MOBILE = navigator.userAgent.match( /(iphone|ipod|android)/gi ), - // Configurations defaults, can be overridden at initialization time config = { @@ -113,19 +111,14 @@ var Reveal = (function(){ // Cached references to DOM elements dom = {}, - // Detect support for CSS 3D transforms - supports3DTransforms = 'WebkitPerspective' in document.body.style || - 'MozPerspective' in document.body.style || - 'msPerspective' in document.body.style || - 'OPerspective' in document.body.style || - 'perspective' in document.body.style, + // Client support for CSS 3D transforms, see #checkCapabilities() + supports3DTransforms, - // Detect support for CSS 2D transforms - supports2DTransforms = 'WebkitTransform' in document.body.style || - 'MozTransform' in document.body.style || - 'msTransform' in document.body.style || - 'OTransform' in document.body.style || - 'transform' in document.body.style, + // Client support for CSS 2D transforms, see #checkCapabilities() + supports2DTransforms, + + // Client is a mobile device, see #checkCapabilities() + isMobileDevice, // Throttles mouse wheel navigation lastMouseWheelStep = 0, @@ -160,6 +153,8 @@ var Reveal = (function(){ */ function initialize( options ) { + checkCapabilities(); + if( !supports2DTransforms && !supports3DTransforms ) { document.body.setAttribute( 'class', 'no-transforms' ); @@ -182,6 +177,28 @@ var Reveal = (function(){ } + /** + * Inspect the client to see what it's capable of, this + * should only happens once per runtime. + */ + function checkCapabilities() { + + supports3DTransforms = 'WebkitPerspective' in document.body.style || + 'MozPerspective' in document.body.style || + 'msPerspective' in document.body.style || + 'OPerspective' in document.body.style || + 'perspective' in document.body.style; + + supports2DTransforms = 'WebkitTransform' in document.body.style || + 'MozTransform' in document.body.style || + 'msTransform' in document.body.style || + 'OTransform' in document.body.style || + 'transform' in document.body.style; + + isMobileDevice = navigator.userAgent.match( /(iphone|ipod|android)/gi ); + + } + /** * Finds and stores references to DOM elements which are * required by the presentation. If a required element is @@ -1569,7 +1586,7 @@ var Reveal = (function(){ var threshold = 3; // Heavily limited on weaker devices - if( IS_MOBILE ) { + if( isMobileDevice ) { threshold = 1; } diff --git a/js/reveal.min.js b/js/reveal.min.js index 8752c355..4b3956b9 100644 --- a/js/reveal.min.js +++ b/js/reveal.min.js @@ -1,8 +1,8 @@ /*! - * reveal.js 2.5.0 (2013-08-10, 12:49) + * reveal.js 2.5.0 (2013-08-10, 13:10) * http://lab.hakim.se/reveal-js * MIT licensed * * Copyright (C) 2013 Hakim El Hattab, http://hakim.se */ -var Reveal=function(){"use strict";function e(e){return Xt||Ht?(window.addEventListener("load",k,!1),l(Rt,e),r(),o(),void 0):(document.body.setAttribute("class","no-transforms"),void 0)}function t(){if(zt.theme=document.querySelector("#theme"),zt.wrapper=document.querySelector(".reveal"),zt.slides=document.querySelector(".reveal .slides"),document.querySelector(".reveal .backgrounds")||(zt.background=document.createElement("div"),zt.background.classList.add("backgrounds"),zt.wrapper.appendChild(zt.background)),!zt.wrapper.querySelector(".progress")){var e=document.createElement("div");e.classList.add("progress"),e.innerHTML="",zt.wrapper.appendChild(e)}if(!zt.wrapper.querySelector(".controls")){var t=document.createElement("aside");t.classList.add("controls"),t.innerHTML='
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