2020-03-16 15:18:47 +01:00
|
|
|
import { queryAll, extend, createStyleSheet } from '../utils/util.js'
|
2020-03-19 16:27:42 +01:00
|
|
|
import { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'
|
2020-03-09 14:44:57 +01:00
|
|
|
|
2020-03-09 16:01:50 +01:00
|
|
|
/**
|
|
|
|
* Automatically animates matching elements across
|
|
|
|
* slides with the [data-auto-animate] attribute.
|
|
|
|
*/
|
2020-03-09 14:44:57 +01:00
|
|
|
export default class AutoAnimate {
|
|
|
|
|
|
|
|
constructor( Reveal ) {
|
|
|
|
|
|
|
|
this.Reveal = Reveal;
|
|
|
|
|
|
|
|
// Counter used to generate unique IDs for auto-animated elements
|
|
|
|
this.autoAnimateCounter = 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Runs an auto-animation between the given slides.
|
|
|
|
*
|
|
|
|
* @param {HTMLElement} fromSlide
|
|
|
|
* @param {HTMLElement} toSlide
|
|
|
|
*/
|
|
|
|
run( fromSlide, toSlide ) {
|
|
|
|
|
|
|
|
// Clean up after prior animations
|
|
|
|
this.reset();
|
|
|
|
|
|
|
|
// Ensure that both slides are auto-animate targets
|
|
|
|
if( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) ) {
|
|
|
|
|
|
|
|
// Create a new auto-animate sheet
|
|
|
|
this.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();
|
|
|
|
|
|
|
|
let animationOptions = this.getAutoAnimateOptions( toSlide );
|
|
|
|
|
|
|
|
// Set our starting state
|
|
|
|
fromSlide.dataset.autoAnimate = 'pending';
|
|
|
|
toSlide.dataset.autoAnimate = 'pending';
|
|
|
|
|
2020-03-19 15:18:14 +01:00
|
|
|
// Flag the navigation direction, needed for fragment buildup
|
|
|
|
let allSlides = this.Reveal.getSlides();
|
|
|
|
animationOptions.slideDirection = allSlides.indexOf( toSlide ) > allSlides.indexOf( fromSlide ) ? 'forward' : 'backward';
|
|
|
|
|
2020-03-09 14:44:57 +01:00
|
|
|
// Inject our auto-animate styles for this transition
|
|
|
|
let css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {
|
2020-03-19 15:18:14 +01:00
|
|
|
return this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, this.autoAnimateCounter++ );
|
2020-03-09 14:44:57 +01:00
|
|
|
} );
|
|
|
|
|
|
|
|
// Animate unmatched elements, if enabled
|
|
|
|
if( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {
|
2020-03-17 19:38:26 +01:00
|
|
|
|
|
|
|
// Our default timings for unmatched elements
|
|
|
|
let defaultUnmatchedDuration = animationOptions.duration * 0.8,
|
|
|
|
defaultUnmatchedDelay = animationOptions.duration * 0.2;
|
|
|
|
|
2020-03-09 14:44:57 +01:00
|
|
|
this.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {
|
|
|
|
|
2020-03-17 19:38:26 +01:00
|
|
|
let unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );
|
|
|
|
let id = 'unmatched';
|
|
|
|
|
|
|
|
// If there is a duration or delay set specifically for this
|
|
|
|
// element our unmatched elements should adhere to those
|
|
|
|
if( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {
|
|
|
|
id = 'unmatched-' + this.autoAnimateCounter++;
|
|
|
|
css.push( `[data-auto-animate="running"] [data-auto-animate-target="${id}"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );
|
|
|
|
}
|
|
|
|
|
|
|
|
unmatchedElement.dataset.autoAnimateTarget = id;
|
|
|
|
|
|
|
|
}, this );
|
|
|
|
|
|
|
|
// Our default transition for unmatched elements
|
|
|
|
css.push( `[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );
|
|
|
|
|
2020-03-09 14:44:57 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
// Setting the whole chunk of CSS at once is the most
|
|
|
|
// efficient way to do this. Using sheet.insertRule
|
|
|
|
// is multiple factors slower.
|
|
|
|
this.autoAnimateStyleSheet.innerHTML = css.join( '' );
|
|
|
|
|
|
|
|
// Start the animation next cycle
|
|
|
|
requestAnimationFrame( () => {
|
|
|
|
if( this.autoAnimateStyleSheet ) {
|
|
|
|
// This forces our newly injected styles to be applied in Firefox
|
|
|
|
getComputedStyle( this.autoAnimateStyleSheet ).fontWeight;
|
|
|
|
|
|
|
|
toSlide.dataset.autoAnimate = 'running';
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
|
2020-03-12 17:08:20 +01:00
|
|
|
this.Reveal.dispatchEvent({
|
|
|
|
type: 'autoanimate',
|
|
|
|
data: {
|
|
|
|
fromSlide,
|
|
|
|
toSlide,
|
|
|
|
sheet: this.autoAnimateStyleSheet
|
|
|
|
}
|
|
|
|
});
|
2020-03-09 14:44:57 +01:00
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Rolls back all changes that we've made to the DOM so
|
|
|
|
* that as part of animating.
|
|
|
|
*/
|
|
|
|
reset() {
|
|
|
|
|
|
|
|
// Reset slides
|
2020-03-16 15:18:47 +01:00
|
|
|
queryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=""])' ).forEach( element => {
|
2020-03-09 14:44:57 +01:00
|
|
|
element.dataset.autoAnimate = '';
|
|
|
|
} );
|
|
|
|
|
|
|
|
// Reset elements
|
2020-03-16 15:18:47 +01:00
|
|
|
queryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {
|
2020-03-09 14:44:57 +01:00
|
|
|
delete element.dataset.autoAnimateTarget;
|
|
|
|
} );
|
|
|
|
|
|
|
|
// Remove the animation sheet
|
|
|
|
if( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {
|
|
|
|
this.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );
|
|
|
|
this.autoAnimateStyleSheet = null;
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2020-03-19 15:18:14 +01:00
|
|
|
* Creates a FLIP animation where the `to` element starts out
|
|
|
|
* in the `from` element position and animates to its original
|
|
|
|
* state.
|
2020-03-09 14:44:57 +01:00
|
|
|
*
|
|
|
|
* @param {HTMLElement} from
|
|
|
|
* @param {HTMLElement} to
|
|
|
|
* @param {Object} elementOptions Options for this element pair
|
|
|
|
* @param {Object} animationOptions Options set at the slide level
|
|
|
|
* @param {String} id Unique ID that we can use to identify this
|
|
|
|
* auto-animate element in the DOM
|
|
|
|
*/
|
2020-03-19 15:18:14 +01:00
|
|
|
autoAnimateElements( from, to, elementOptions, animationOptions, id ) {
|
2020-03-09 14:44:57 +01:00
|
|
|
|
|
|
|
// 'from' elements are given a data-auto-animate-target with no value,
|
|
|
|
// 'to' elements are are given a data-auto-animate-target with an ID
|
|
|
|
from.dataset.autoAnimateTarget = '';
|
|
|
|
to.dataset.autoAnimateTarget = id;
|
|
|
|
|
|
|
|
// Each element may override any of the auto-animate options
|
|
|
|
// like transition easing, duration and delay via data-attributes
|
|
|
|
let options = this.getAutoAnimateOptions( to, animationOptions );
|
|
|
|
|
|
|
|
// If we're using a custom element matcher the element options
|
|
|
|
// may contain additional transition overrides
|
|
|
|
if( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;
|
|
|
|
if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;
|
|
|
|
if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;
|
|
|
|
|
|
|
|
let fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),
|
|
|
|
toProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );
|
|
|
|
|
2020-03-19 15:18:14 +01:00
|
|
|
// Maintain fragment visibility for matching elements when
|
|
|
|
// we're navigating forwards, this way the viewer won't need
|
|
|
|
// to step through the same fragments twice
|
|
|
|
if( to.classList.contains( 'fragment' ) ) {
|
|
|
|
|
|
|
|
// Don't auto-animate the opacity of fragments to avoid
|
|
|
|
// conflicts with fragment animations
|
|
|
|
delete toProps.styles['opacity'];
|
|
|
|
|
2020-03-19 16:27:42 +01:00
|
|
|
if( from.classList.contains( 'fragment' ) ) {
|
|
|
|
|
|
|
|
let fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
|
|
|
|
let toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
|
|
|
|
|
|
|
|
// Only skip the fragment if the fragment animation style
|
|
|
|
// remains unchanged
|
|
|
|
if( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {
|
|
|
|
to.classList.add( 'visible', 'disabled' );
|
|
|
|
}
|
|
|
|
|
2020-03-19 15:18:14 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2020-03-09 14:44:57 +01:00
|
|
|
// If translation and/or scaling are enabled, css transform
|
|
|
|
// the 'to' element so that it matches the position and size
|
|
|
|
// of the 'from' element
|
|
|
|
if( elementOptions.translate !== false || elementOptions.scale !== false ) {
|
|
|
|
|
|
|
|
let presentationScale = this.Reveal.getScale();
|
|
|
|
|
|
|
|
let delta = {
|
|
|
|
x: ( fromProps.x - toProps.x ) / presentationScale,
|
|
|
|
y: ( fromProps.y - toProps.y ) / presentationScale,
|
|
|
|
scaleX: fromProps.width / toProps.width,
|
|
|
|
scaleY: fromProps.height / toProps.height
|
|
|
|
};
|
|
|
|
|
|
|
|
// Limit decimal points to avoid 0.0001px blur and stutter
|
|
|
|
delta.x = Math.round( delta.x * 1000 ) / 1000;
|
|
|
|
delta.y = Math.round( delta.y * 1000 ) / 1000;
|
|
|
|
delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
|
|
|
|
delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
|
|
|
|
|
|
|
|
let translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),
|
|
|
|
scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );
|
|
|
|
|
|
|
|
// No need to transform if nothing's changed
|
|
|
|
if( translate || scale ) {
|
|
|
|
|
|
|
|
let transform = [];
|
|
|
|
|
|
|
|
if( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );
|
|
|
|
if( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );
|
|
|
|
|
|
|
|
fromProps.styles['transform'] = transform.join( ' ' );
|
|
|
|
fromProps.styles['transform-origin'] = 'top left';
|
|
|
|
|
|
|
|
toProps.styles['transform'] = 'none';
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
// Delete all unchanged 'to' styles
|
|
|
|
for( let propertyName in toProps.styles ) {
|
|
|
|
const toValue = toProps.styles[propertyName];
|
|
|
|
const fromValue = fromProps.styles[propertyName];
|
|
|
|
|
|
|
|
if( toValue === fromValue ) {
|
|
|
|
delete toProps.styles[propertyName];
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
// If these property values were set via a custom matcher providing
|
|
|
|
// an explicit 'from' and/or 'to' value, we always inject those values.
|
|
|
|
if( toValue.explicitValue === true ) {
|
|
|
|
toProps.styles[propertyName] = toValue.value;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( fromValue.explicitValue === true ) {
|
|
|
|
fromProps.styles[propertyName] = fromValue.value;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
let css = '';
|
|
|
|
|
|
|
|
let toStyleProperties = Object.keys( toProps.styles );
|
|
|
|
|
|
|
|
// Only create animate this element IF at least one style
|
|
|
|
// property has changed
|
|
|
|
if( toStyleProperties.length > 0 ) {
|
|
|
|
|
|
|
|
// Instantly move to the 'from' state
|
|
|
|
fromProps.styles['transition'] = 'none';
|
|
|
|
|
|
|
|
// Animate towards the 'to' state
|
|
|
|
toProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;
|
|
|
|
toProps.styles['transition-property'] = toStyleProperties.join( ', ' );
|
|
|
|
toProps.styles['will-change'] = toStyleProperties.join( ', ' );
|
|
|
|
|
|
|
|
// Build up our custom CSS. We need to override inline styles
|
|
|
|
// so we need to make our styles vErY IMPORTANT!1!!
|
|
|
|
let fromCSS = Object.keys( fromProps.styles ).map( propertyName => {
|
|
|
|
return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';
|
|
|
|
} ).join( '' );
|
|
|
|
|
|
|
|
let toCSS = Object.keys( toProps.styles ).map( propertyName => {
|
|
|
|
return propertyName + ': ' + toProps.styles[propertyName] + ' !important;';
|
|
|
|
} ).join( '' );
|
|
|
|
|
|
|
|
css = '[data-auto-animate-target="'+ id +'"] {'+ fromCSS +'}' +
|
|
|
|
'[data-auto-animate="running"] [data-auto-animate-target="'+ id +'"] {'+ toCSS +'}';
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
return css;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns the auto-animate options for the given element.
|
|
|
|
*
|
|
|
|
* @param {HTMLElement} element Element to pick up options
|
|
|
|
* from, either a slide or an animation target
|
|
|
|
* @param {Object} [inheritedOptions] Optional set of existing
|
|
|
|
* options
|
|
|
|
*/
|
|
|
|
getAutoAnimateOptions( element, inheritedOptions ) {
|
|
|
|
|
|
|
|
let options = {
|
|
|
|
easing: this.Reveal.getConfig().autoAnimateEasing,
|
|
|
|
duration: this.Reveal.getConfig().autoAnimateDuration,
|
|
|
|
delay: 0
|
|
|
|
};
|
|
|
|
|
|
|
|
options = extend( options, inheritedOptions );
|
|
|
|
|
|
|
|
// Inherit options from parent elements
|
|
|
|
if( element.closest && element.parentNode ) {
|
|
|
|
let autoAnimatedParent = element.parentNode.closest( '[data-auto-animate-target]' );
|
|
|
|
if( autoAnimatedParent ) {
|
|
|
|
options = this.getAutoAnimateOptions( autoAnimatedParent, options );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if( element.dataset.autoAnimateEasing ) {
|
|
|
|
options.easing = element.dataset.autoAnimateEasing;
|
|
|
|
}
|
|
|
|
|
|
|
|
if( element.dataset.autoAnimateDuration ) {
|
|
|
|
options.duration = parseFloat( element.dataset.autoAnimateDuration );
|
|
|
|
}
|
|
|
|
|
|
|
|
if( element.dataset.autoAnimateDelay ) {
|
|
|
|
options.delay = parseFloat( element.dataset.autoAnimateDelay );
|
|
|
|
}
|
|
|
|
|
|
|
|
return options;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns an object containing all of the properties
|
|
|
|
* that can be auto-animated for the given element and
|
|
|
|
* their current computed values.
|
|
|
|
*
|
|
|
|
* @param {String} direction 'from' or 'to'
|
|
|
|
*/
|
|
|
|
getAutoAnimatableProperties( direction, element, elementOptions ) {
|
|
|
|
|
2020-05-08 20:33:28 +02:00
|
|
|
let config = this.Reveal.getConfig();
|
|
|
|
|
2020-03-09 14:44:57 +01:00
|
|
|
let properties = { styles: [] };
|
|
|
|
|
|
|
|
// Position and size
|
|
|
|
if( elementOptions.translate !== false || elementOptions.scale !== false ) {
|
|
|
|
let bounds;
|
|
|
|
|
|
|
|
// Custom auto-animate may optionally return a custom tailored
|
|
|
|
// measurement function
|
|
|
|
if( typeof elementOptions.measure === 'function' ) {
|
|
|
|
bounds = elementOptions.measure( element );
|
|
|
|
}
|
|
|
|
else {
|
2020-05-08 20:33:28 +02:00
|
|
|
if( config.center ) {
|
|
|
|
// More precise, but breaks when used in combination
|
|
|
|
// with zoom for scaling the deck ¯\_(ツ)_/¯
|
|
|
|
bounds = element.getBoundingClientRect();
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
let scale = this.Reveal.getScale();
|
|
|
|
bounds = {
|
|
|
|
x: element.offsetLeft * scale,
|
|
|
|
y: element.offsetTop * scale,
|
|
|
|
width: element.offsetWidth * scale,
|
|
|
|
height: element.offsetHeight * scale
|
|
|
|
};
|
|
|
|
}
|
2020-03-09 14:44:57 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
properties.x = bounds.x;
|
|
|
|
properties.y = bounds.y;
|
|
|
|
properties.width = bounds.width;
|
|
|
|
properties.height = bounds.height;
|
|
|
|
}
|
|
|
|
|
|
|
|
const computedStyles = getComputedStyle( element );
|
|
|
|
|
|
|
|
// CSS styles
|
2020-05-08 20:33:28 +02:00
|
|
|
( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {
|
2020-03-09 14:44:57 +01:00
|
|
|
let value;
|
|
|
|
|
|
|
|
// `style` is either the property name directly, or an object
|
|
|
|
// definition of a style property
|
|
|
|
if( typeof style === 'string' ) style = { property: style };
|
|
|
|
|
|
|
|
if( typeof style.from !== 'undefined' && direction === 'from' ) {
|
|
|
|
value = { value: style.from, explicitValue: true };
|
|
|
|
}
|
|
|
|
else if( typeof style.to !== 'undefined' && direction === 'to' ) {
|
|
|
|
value = { value: style.to, explicitValue: true };
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
value = computedStyles[style.property];
|
|
|
|
}
|
|
|
|
|
|
|
|
if( value !== '' ) {
|
|
|
|
properties.styles[style.property] = value;
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
|
|
|
|
return properties;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Get a list of all element pairs that we can animate
|
|
|
|
* between the given slides.
|
|
|
|
*
|
|
|
|
* @param {HTMLElement} fromSlide
|
|
|
|
* @param {HTMLElement} toSlide
|
|
|
|
*
|
|
|
|
* @return {Array} Each value is an array where [0] is
|
|
|
|
* the element we're animating from and [1] is the
|
|
|
|
* element we're animating to
|
|
|
|
*/
|
|
|
|
getAutoAnimatableElements( fromSlide, toSlide ) {
|
|
|
|
|
|
|
|
let matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;
|
|
|
|
|
|
|
|
let pairs = matcher.call( this, fromSlide, toSlide );
|
|
|
|
|
|
|
|
let reserved = [];
|
|
|
|
|
|
|
|
// Remove duplicate pairs
|
|
|
|
return pairs.filter( ( pair, index ) => {
|
|
|
|
if( reserved.indexOf( pair.to ) === -1 ) {
|
|
|
|
reserved.push( pair.to );
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Identifies matching elements between slides.
|
|
|
|
*
|
|
|
|
* You can specify a custom matcher function by using
|
|
|
|
* the `autoAnimateMatcher` config option.
|
|
|
|
*/
|
|
|
|
getAutoAnimatePairs( fromSlide, toSlide ) {
|
|
|
|
|
|
|
|
let pairs = [];
|
|
|
|
|
|
|
|
const codeNodes = 'pre';
|
|
|
|
const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
|
|
|
|
const mediaNodes = 'img, video, iframe';
|
|
|
|
|
|
|
|
// Eplicit matches via data-id
|
|
|
|
this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
|
|
|
|
return node.nodeName + ':::' + node.getAttribute( 'data-id' );
|
|
|
|
} );
|
|
|
|
|
|
|
|
// Text
|
|
|
|
this.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {
|
|
|
|
return node.nodeName + ':::' + node.innerText;
|
|
|
|
} );
|
|
|
|
|
|
|
|
// Media
|
|
|
|
this.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {
|
|
|
|
return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );
|
|
|
|
} );
|
|
|
|
|
|
|
|
// Code
|
|
|
|
this.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {
|
|
|
|
return node.nodeName + ':::' + node.innerText;
|
|
|
|
} );
|
|
|
|
|
|
|
|
pairs.forEach( pair => {
|
|
|
|
|
|
|
|
// Disable scale transformations on text nodes, we transiition
|
|
|
|
// each individual text property instead
|
|
|
|
if( pair.from.matches( textNodes ) ) {
|
|
|
|
pair.options = { scale: false };
|
|
|
|
}
|
|
|
|
// Animate individual lines of code
|
|
|
|
else if( pair.from.matches( codeNodes ) ) {
|
|
|
|
|
|
|
|
// Transition the code block's width and height instead of scaling
|
|
|
|
// to prevent its content from being squished
|
|
|
|
pair.options = { scale: false, styles: [ 'width', 'height' ] };
|
|
|
|
|
|
|
|
// Lines of code
|
|
|
|
this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {
|
|
|
|
return node.textContent;
|
|
|
|
}, {
|
|
|
|
scale: false,
|
|
|
|
styles: [],
|
|
|
|
measure: this.getLocalBoundingBox.bind( this )
|
|
|
|
} );
|
|
|
|
|
|
|
|
// Line numbers
|
|
|
|
this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
|
|
|
|
return node.getAttribute( 'data-line-number' );
|
|
|
|
}, {
|
|
|
|
scale: false,
|
|
|
|
styles: [ 'width' ],
|
|
|
|
measure: this.getLocalBoundingBox.bind( this )
|
|
|
|
} );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}, this );
|
|
|
|
|
|
|
|
return pairs;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Helper method which returns a bounding box based on
|
|
|
|
* the given elements offset coordinates.
|
|
|
|
*
|
|
|
|
* @param {HTMLElement} element
|
|
|
|
* @return {Object} x, y, width, height
|
|
|
|
*/
|
|
|
|
getLocalBoundingBox( element ) {
|
|
|
|
|
|
|
|
const presentationScale = this.Reveal.getScale();
|
|
|
|
|
|
|
|
return {
|
|
|
|
x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,
|
|
|
|
y: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,
|
|
|
|
width: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,
|
|
|
|
height: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100
|
|
|
|
};
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Finds matching elements between two slides.
|
|
|
|
*
|
|
|
|
* @param {Array} pairs List of pairs to push matches to
|
|
|
|
* @param {HTMLElement} fromScope Scope within the from element exists
|
|
|
|
* @param {HTMLElement} toScope Scope within the to element exists
|
|
|
|
* @param {String} selector CSS selector of the element to match
|
|
|
|
* @param {Function} serializer A function that accepts an element and returns
|
|
|
|
* a stringified ID based on its contents
|
|
|
|
* @param {Object} animationOptions Optional config options for this pair
|
|
|
|
*/
|
|
|
|
findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {
|
|
|
|
|
|
|
|
let fromMatches = {};
|
|
|
|
let toMatches = {};
|
|
|
|
|
|
|
|
[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
|
|
|
|
const key = serializer( element );
|
|
|
|
if( typeof key === 'string' && key.length ) {
|
|
|
|
fromMatches[key] = fromMatches[key] || [];
|
|
|
|
fromMatches[key].push( element );
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
|
|
|
|
[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
|
|
|
|
const key = serializer( element );
|
|
|
|
toMatches[key] = toMatches[key] || [];
|
|
|
|
toMatches[key].push( element );
|
|
|
|
|
|
|
|
let fromElement;
|
|
|
|
|
|
|
|
// Retrieve the 'from' element
|
|
|
|
if( fromMatches[key] ) {
|
|
|
|
const pimaryIndex = toMatches[key].length - 1;
|
|
|
|
const secondaryIndex = fromMatches[key].length - 1;
|
|
|
|
|
|
|
|
// If there are multiple identical from elements, retrieve
|
|
|
|
// the one at the same index as our to-element.
|
|
|
|
if( fromMatches[key][ pimaryIndex ] ) {
|
|
|
|
fromElement = fromMatches[key][ pimaryIndex ];
|
|
|
|
fromMatches[key][ pimaryIndex ] = null;
|
|
|
|
}
|
|
|
|
// If there are no matching from-elements at the same index,
|
|
|
|
// use the last one.
|
|
|
|
else if( fromMatches[key][ secondaryIndex ] ) {
|
|
|
|
fromElement = fromMatches[key][ secondaryIndex ];
|
|
|
|
fromMatches[key][ secondaryIndex ] = null;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// If we've got a matching pair, push it to the list of pairs
|
|
|
|
if( fromElement ) {
|
|
|
|
pairs.push({
|
|
|
|
from: fromElement,
|
|
|
|
to: element,
|
|
|
|
options: animationOptions
|
|
|
|
});
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns a all elements within the given scope that should
|
|
|
|
* be considered unmatched in an auto-animate transition. If
|
|
|
|
* fading of unmatched elements is turned on, these elements
|
|
|
|
* will fade when going between auto-animate slides.
|
|
|
|
*
|
|
|
|
* Note that parents of auto-animate targets are NOT considerd
|
|
|
|
* unmatched since fading them would break the auto-animation.
|
|
|
|
*
|
|
|
|
* @param {HTMLElement} rootElement
|
|
|
|
* @return {Array}
|
|
|
|
*/
|
|
|
|
getUnmatchedAutoAnimateElements( rootElement ) {
|
|
|
|
|
|
|
|
return [].slice.call( rootElement.children ).reduce( ( result, element ) => {
|
|
|
|
|
|
|
|
const containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );
|
|
|
|
|
|
|
|
// The element is unmatched if
|
|
|
|
// - It is not an auto-animate target
|
|
|
|
// - It does not contain any auto-animate targets
|
|
|
|
if( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {
|
|
|
|
result.push( element );
|
|
|
|
}
|
|
|
|
|
|
|
|
if( element.querySelector( '[data-auto-animate-target]' ) ) {
|
|
|
|
result = result.concat( this.getUnmatchedAutoAnimateElements( element ) );
|
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
|
|
|
|
}, [] );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|