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merge dom setup refactor #544

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This commit is contained in:
Hakim El Hattab 2013-08-11 16:47:56 -04:00
commit 41edd914ad
2 changed files with 32 additions and 35 deletions
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63
js/reveal.js
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@ -222,49 +222,26 @@ var Reveal = (function(){
dom.slides.classList.add( 'no-transition' );
// Background element
if( !document.querySelector( '.reveal .backgrounds' ) ) {
dom.background = document.createElement( 'div' );
dom.background.classList.add( 'backgrounds' );
dom.wrapper.appendChild( dom.background );
}
dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
// Progress bar
if( !dom.wrapper.querySelector( '.progress' ) ) {
var progressElement = document.createElement( 'div' );
progressElement.classList.add( 'progress' );
progressElement.innerHTML = '<span></span>';
dom.wrapper.appendChild( progressElement );
}
dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
dom.progressbar = dom.progress.querySelector( 'span' );
// Arrow controls
if( !dom.wrapper.querySelector( '.controls' ) ) {
var controlsElement = document.createElement( 'aside' );
controlsElement.classList.add( 'controls' );
controlsElement.innerHTML = '<div class="navigate-left"></div>' +
'<div class="navigate-right"></div>' +
'<div class="navigate-up"></div>' +
'<div class="navigate-down"></div>';
dom.wrapper.appendChild( controlsElement );
}
createSingletonNode( dom.wrapper, 'aside', 'controls',
'<div class="navigate-left"></div>' +
'<div class="navigate-right"></div>' +
'<div class="navigate-up"></div>' +
'<div class="navigate-down"></div>' );
// State background element [DEPRECATED]
if( !dom.wrapper.querySelector( '.state-background' ) ) {
var stateBackgroundElement = document.createElement( 'div' );
stateBackgroundElement.classList.add( 'state-background' );
dom.wrapper.appendChild( stateBackgroundElement );
}
createSingletonNode( dom.wrapper, 'div', 'state-background', null );
// Overlay graphic which is displayed during the paused mode
if( !dom.wrapper.querySelector( '.pause-overlay' ) ) {
var pausedElement = document.createElement( 'div' );
pausedElement.classList.add( 'pause-overlay' );
dom.wrapper.appendChild( pausedElement );
}
createSingletonNode( dom.wrapper, 'div', 'pause-overlay', null );
// Cache references to elements
dom.progress = document.querySelector( '.reveal .progress' );
dom.progressbar = document.querySelector( '.reveal .progress span' );
if ( config.controls ) {
dom.controls = document.querySelector( '.reveal .controls' );
@ -279,6 +256,26 @@ var Reveal = (function(){
}
/**
* Creates an HTML element and returns a reference to it.
* If the element already exists the existing instance will
* be returned.
*/
function createSingletonNode( container, tagname, classname, innerHTML ) {
var node = container.querySelector( '.' + classname );
if( !node ) {
node = document.createElement( tagname );
node.classList.add( classname );
if( innerHTML !== null ) {
node.innerHTML = innerHTML;
}
container.appendChild( node );
}
return node;
}
/**
* Creates the slide background elements and appends them
* to the background container. One element is created per

4
js/reveal.min.js vendored
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