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More robost calculation of .stretch height

master
Daniel Moore 2014-03-13 18:22:30 -05:00
parent 0140fd9ee6
commit 1a7732c235
1 changed files with 11 additions and 25 deletions
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36
js/reveal.js
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@ -836,40 +836,26 @@ var Reveal = (function(){
/**
* Returns the remaining height within the parent of the
* target element after subtracting the height of all
* siblings.
* target element.
*
* remaining height = [parent height] - [ siblings height]
* remaining height = [ configured parent height ] - [ current parent height ]
*/
function getRemainingHeight( element, height ) {
height = height || 0;
if( element ) {
var parent = element.parentNode;
var siblings = parent.childNodes;
var newHeight, oldHeight = element.style.height;
// Subtract the height of each sibling
toArray( siblings ).forEach( function( sibling ) {
// Change the .stretch element height to 0 in order find the height of all
// the other elements
element.style.height = '0px';
newHeight = height - element.parentNode.offsetHeight;
if( typeof sibling.offsetHeight === 'number' && sibling !== element ) {
var styles = window.getComputedStyle( sibling ),
marginTop = parseInt( styles.marginTop, 10 ),
marginBottom = parseInt( styles.marginBottom, 10 );
height -= sibling.offsetHeight + marginTop + marginBottom;
}
} );
var elementStyles = window.getComputedStyle( element );
// Subtract the margins of the target element
height -= parseInt( elementStyles.marginTop, 10 ) +
parseInt( elementStyles.marginBottom, 10 );
// Restore the old height, just in case
element.style.height = oldHeight + 'px';
return newHeight;
}
return height;
@ -1149,7 +1135,7 @@ var Reveal = (function(){
toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( function( element ) {
// Determine how much vertical space we can use
var remainingHeight = getRemainingHeight( element, ( height - ( padding * 2 ) ) );
var remainingHeight = getRemainingHeight( element, height );
// Consider the aspect ratio of media elements
if( /(img|video)/gi.test( element.nodeName ) ) {