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further work on remaining-height helper #244 #490 #561

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This commit is contained in:
Hakim El Hattab 2013-08-17 12:11:05 -04:00
parent fecee266b6
commit 0239302f45
2 changed files with 26 additions and 33 deletions
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55
js/reveal.js
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@ -722,43 +722,29 @@ var Reveal = (function(){
}
function getComputedCSSProperty( element, prop ) {
if( window.getComputedStyle ) {
return window.getComputedStyle( element )[ prop ];
}
else {
return element.currentStyle ? element.currentStyle( prop ) : element.style[ prop ];
}
}
/**
* Returns the remaining height within the parent element
* of the target after taking out the height of all
* Returns the remaining height within the parent of the
* target element after subtracting the height of all
* siblings.
*
* remaining height = [parent height] - [ siblings height]
*/
function getRemainingHeight( element ) {
function getRemainingHeight( element, height ) {
var height = 0;
height = height || 0;
if( element ) {
var parent = element.parentNode;
var siblings = parent.childNodes;
height = config.height;
// Remove the height of each sibling
// Subtract the height of each sibling
toArray( siblings ).forEach( function( sibling ) {
if( typeof sibling.offsetHeight === 'number' && sibling !== element ) {
var marginTop = parseInt( getComputedCSSProperty( sibling, 'margin-top' ), 10 );
var marginBottom = parseInt( getComputedCSSProperty( sibling, 'margin-bottom' ), 10 );
console.log( marginTop, marginBottom );
var styles = window.getComputedStyle( sibling ),
marginTop = parseInt( styles[ 'margin-top' ], 10 ),
marginBottom = parseInt( styles[ 'margin-bottom' ], 10 );
height -= sibling.offsetHeight + marginTop + marginBottom;
@ -766,6 +752,12 @@ var Reveal = (function(){
} );
var elementStyles = window.getComputedStyle( element );
// Subtract the margins of the target element
height -= parseInt( elementStyles[ 'margin-top' ], 10 ) +
parseInt( elementStyles[ 'margin-bottom' ], 10 );
}
return height;
@ -1006,7 +998,8 @@ var Reveal = (function(){
// Dimensions of the content
var slideWidth = config.width,
slideHeight = config.height;
slideHeight = config.height,
slidePadding = 20; // TODO Dig this out of DOM
// Slide width may be a percentage of available width
if( typeof slideWidth === 'string' && /%$/.test( slideWidth ) ) {
@ -1021,6 +1014,13 @@ var Reveal = (function(){
dom.slides.style.width = slideWidth + 'px';
dom.slides.style.height = slideHeight + 'px';
// Handle sizing of elements with the 'remaining-height' class
toArray( dom.slides.querySelectorAll( 'section > .remaining-height' ) ).forEach( function( element ) {
element.style.height = getRemainingHeight( element, ( slideHeight - ( slidePadding * 2 ) ) ) + 'px';
} );
// Determine scale of content to fit within available space
scale = Math.min( availableWidth / slideWidth, availableHeight / slideHeight );
@ -1056,7 +1056,7 @@ var Reveal = (function(){
slide.style.top = 0;
}
else {
slide.style.top = Math.max( - ( getAbsoluteHeight( slide ) / 2 ) - 20, -slideHeight / 2 ) + 'px';
slide.style.top = Math.max( - ( getAbsoluteHeight( slide ) / 2 ) - slidePadding, -slideHeight / 2 ) + 'px';
}
}
else {
@ -1067,13 +1067,6 @@ var Reveal = (function(){
updateProgress();
// Handle sizing of elements with the 'remaining-height' class
toArray( dom.slides.querySelectorAll( 'section > .remaining-height' ) ).forEach( function( element ) {
element.style.height = getRemainingHeight( element ) + 'px';
} );
}
}

4
js/reveal.min.js vendored
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