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/* global jetpackSlideshowSettings */
function JetpackSlideshow( element, transition, autostart ) {
this.element = element;
this.images = [];
this.controls = {};
this.transition = transition || 'fade';
this.autostart = autostart;
}
JetpackSlideshow.prototype.showLoadingImage = function ( toggle ) {
if ( toggle ) {
this.loadingImage_ = document.createElement( 'div' );
this.loadingImage_.className = 'jetpack-slideshow-loading';
var img = document.createElement( 'img' );
img.src = jetpackSlideshowSettings.spinner;
this.loadingImage_.appendChild( img );
this.loadingImage_.appendChild( this.makeZeroWidthSpan() );
this.element.append( this.loadingImage_ );
} else if ( this.loadingImage_ ) {
this.loadingImage_.parentNode.removeChild( this.loadingImage_ );
this.loadingImage_ = null;
}
};
JetpackSlideshow.prototype.init = function () {
this.showLoadingImage( true );
var self = this;
// Set up DOM.
for ( var i = 0; i < this.images.length; i++ ) {
var imageInfo = this.images[ i ];
var img = document.createElement( 'img' );
img.src = imageInfo.src;
img.title = typeof imageInfo.title !== 'undefined' ? imageInfo.title : '';
img.alt = typeof imageInfo.alt !== 'undefined' ? imageInfo.alt : '';
img.setAttribute( 'itemprop', 'image' );
img.nopin = 'nopin';
var caption = document.createElement( 'div' );
caption.className = 'jetpack-slideshow-slide-caption';
caption.setAttribute( 'itemprop', 'caption description' );
caption.innerHTML = imageInfo.caption;
var container = document.createElement( 'div' );
container.className = 'jetpack-slideshow-slide';
container.setAttribute( 'itemprop', 'associatedMedia' );
container.setAttribute( 'itemscope', '' );
container.setAttribute( 'itemtype', 'https://schema.org/ImageObject' );
// Hide loading image once first image has loaded.
if ( i === 0 ) {
if ( img.complete ) {
// IE, image in cache
setTimeout( function () {
self.finishInit_();
}, 1 );
} else {
img.addEventListener( 'load', function () {
self.finishInit_();
} );
}
}
container.appendChild( img );
// I'm not sure where these were coming from, but IE adds
// bad values for width/height for portrait-mode images
img.removeAttribute( 'width' );
img.removeAttribute( 'height' );
container.appendChild( this.makeZeroWidthSpan() );
container.appendChild( caption );
this.element.append( container );
}
};
JetpackSlideshow.prototype.makeZeroWidthSpan = function () {
var emptySpan = document.createElement( 'span' );
emptySpan.className = 'jetpack-slideshow-line-height-hack';
// Having a NBSP makes IE act weird during transitions, but other
// browsers ignore a text node with a space in it as whitespace.
if ( -1 !== window.navigator.userAgent.indexOf( 'MSIE ' ) ) {
emptySpan.appendChild( document.createTextNode( ' ' ) );
} else {
emptySpan.innerHTML = ' ';
}
return emptySpan;
};
JetpackSlideshow.prototype.finishInit_ = function () {
this.showLoadingImage( false );
this.renderControls_();
var self = this;
if ( this.images.length > 1 ) {
// Initialize Cycle instance.
jQuery( this.element ).cycle( {
fx: this.transition,
prev: this.controls.prev,
next: this.controls.next,
timeout: jetpackSlideshowSettings.speed,
slideExpr: '.jetpack-slideshow-slide',
onPrevNextEvent: function () {
return self.onCyclePrevNextClick_.apply( self, arguments );
},
} );
var slideshow = this.element;
if ( ! this.autostart ) {
jQuery( slideshow ).cycle( 'pause' );
this.controls.stop.classList.remove( 'running' );
this.controls.stop.classList.add( 'paused' );
}
this.controls.stop.addEventListener( 'click', function ( event ) {
var button = event.currentTarget;
if ( button === event.target ) {
event.preventDefault();
if ( ! button.classList.contains( 'paused' ) ) {
jQuery( slideshow ).cycle( 'pause' );
button.classList.remove( 'running' );
button.classList.add( 'paused' );
} else {
button.classList.add( 'running' );
button.classList.remove( 'paused' );
jQuery( slideshow ).cycle( 'resume', true );
}
}
} );
} else {
this.element.children( ':first' ).show();
this.element.css( 'position', 'relative' );
}
this.initialized_ = true;
};
JetpackSlideshow.prototype.renderControls_ = function () {
if ( this.controlsDiv_ ) {
return;
}
var controlsDiv = document.createElement( 'div' );
controlsDiv.className = 'jetpack-slideshow-controls';
var controls = [ 'prev', 'stop', 'next' ];
for ( var i = 0; i < controls.length; i++ ) {
var controlName = controls[ i ];
var label_name = 'label_' + controlName;
var a = document.createElement( 'a' );
a.href = '#';
a.className = 'button-' + controlName;
a.setAttribute( 'aria-label', jetpackSlideshowSettings[ label_name ] );
a.setAttribute( 'role', 'button' );
controlsDiv.appendChild( a );
this.controls[ controlName ] = a;
}
this.element.append( controlsDiv );
this.controlsDiv_ = controlsDiv;
};
JetpackSlideshow.prototype.onCyclePrevNextClick_ = function ( isNext, i /*, slideElement*/ ) {
// If blog_id not present don't track page views
if ( ! jetpackSlideshowSettings.blog_id ) {
return;
}
var postid = this.images[ i ].id;
var stats = new Image();
stats.src =
document.location.protocol +
'//pixel.wp.com/g.gif?host=' +
encodeURIComponent( document.location.host ) +
'&rand=' +
Math.random() +
'&blog=' +
jetpackSlideshowSettings.blog_id +
'&subd=' +
jetpackSlideshowSettings.blog_subdomain +
'&user_id=' +
jetpackSlideshowSettings.user_id +
'&post=' +
postid +
'&ref=' +
encodeURIComponent( document.location );
};
( function () {
function jetpack_slideshow_init() {
document.querySelectorAll( '.jetpack-slideshow-noscript' ).forEach( function ( element ) {
element.remove();
} );
document.querySelectorAll( '.jetpack-slideshow' ).forEach( function ( container ) {
if ( container.dataset.processed === 'true' ) {
return;
}
// Extract data attributes manually
var transition = container.dataset.trans;
var autostart = container.dataset.autostart === 'true';
var gallery = JSON.parse( container.dataset.gallery || '[]' );
var slideshow = new JetpackSlideshow( container, transition, autostart );
slideshow.images = gallery;
slideshow.init();
container.dataset.processed = 'true';
} );
}
document.addEventListener( 'DOMContentLoaded', jetpack_slideshow_init );
document.body.addEventListener( 'post-load', jetpack_slideshow_init );
} )();