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( function ( $ ) {
var jmpressOpts = {
fullscreen: false,
hash: { use: false },
mouse: { clickSelects: false },
keyboard: { use: true },
animation: { transitionDuration: '1s' },
presentationMode: false,
stepSelector: '.step',
duration: {
defaultValue: 0,
},
};
/**
* Presentation constructor
*/
function Presentation( wrapper ) {
var _self, duration, new_css, ie_regex, matches;
_self = this;
_self.wrapper = $( wrapper ); // The wrapper for toggling fullscreen
_self.slideshow = $( '.presentation', wrapper ); // Holds the slides for jmpress
_self.navLeft = $( '.nav-arrow-left', wrapper );
_self.navRight = $( '.nav-arrow-right', wrapper );
_self.expandButton = $( '.nav-fullscreen-button', wrapper );
_self.overlay = $( '.autoplay-overlay', wrapper );
_self.fullscreen = false;
_self.autoPlaying = false;
_self.autoplayTime = parseFloat( _self.slideshow.attr( 'data-autoplay' ), 10 ) || 0;
// The wrapper is scaled to the contents' size so that its border wraps tightly
_self.wrapper.css( {
width: _self.slideshow.width(),
height: _self.slideshow.height(),
} );
duration = _self.slideshow.attr( 'duration' ) || '1s';
jmpressOpts.animation.transitionDuration = duration;
// Compensate for transition times
if ( _self.autoplayTime ) {
_self.autoplayTime += parseFloat( duration, 10 ) * 1000;
}
// Set the opacity transition duration
// as it is delegated by css and not jmpress
duration = 'opacity ' + duration;
new_css = {
width: _self.slideshow.width(),
height: _self.slideshow.height(),
'-webkit-transition': duration,
'-moz-transition': duration,
'-ms-transition': duration,
'-o-transition': duration,
transition: duration,
};
$( '.step', _self.slideshow ).each( function ( i, step ) {
$( step ).css( new_css );
} );
// Apply attribute to allow fading individual bullets here,
// otherwise wp_kses will strip the attribute out
$( '.step.fadebullets li', _self.slideshow ).each( function ( i, step ) {
$( step ).attr( 'data-jmpress', 'fade' );
} );
// Register resizing to window when fullscreen
$( window ).resize( function () {
if ( _self.fullscreen ) {
_self.resizePresentation();
}
} );
// Register the nav bars to move the slides
_self.navLeft.on( 'click', function () {
_self.slideshow.jmpress( 'prev' );
_self.overlay.css( 'opacity', 0 );
return false;
} );
_self.navRight.on( 'click', function () {
_self.slideshow.jmpress( 'next' );
_self.overlay.css( 'opacity', 0 );
return false;
} );
_self.slideshow.on( 'click', function () {
_self.setAutoplay( true );
return false;
} );
_self.slideshow.on( 'focusout', function () {
_self.setAutoplay( false );
} );
// Register toggling fullscreen except for IE 9 or lower
ie_regex = /MSIE\s(\d+)\.\d+/;
matches = ie_regex.exec( navigator.userAgent );
if ( matches && parseInt( matches[ 1 ], 10 ) < 10 ) {
_self.expandButton.remove();
_self.expandButton = null;
} else {
_self.expandButton.on( 'click', function () {
_self.setFullscreen( ! _self.fullscreen );
return false;
} );
}
// Register ESC key to exit fullscreen
$( window ).on( 'keydown', function ( event ) {
if ( event.which === 27 ) {
_self.setFullscreen( false );
}
} );
// Start the presentation
_self.slideshow.jmpress( jmpressOpts );
// Make content visible and remove error message on jmpress success
if ( _self.slideshow.jmpress( 'initialized' ) ) {
_self.slideshow.css( 'display', '' );
_self.overlay.css( 'display', '' );
$( '.not-supported-msg', _self.wrapper ).remove();
}
// A bug in Firefox causes issues with the nav arrows appearing
// on hover in presentation mode. Explicitly disabling fullscreen
// on init seems to fix the issue
_self.setFullscreen( false );
}
$.extend( Presentation.prototype, {
resizePresentation: function () {
var scale, duration, settings, new_css, widthScale, heightScale;
// Set the animation duration to 0 during resizing
// so that there isn't an animation delay when scaling
// up the slide contents
settings = this.slideshow.jmpress( 'settings' );
duration = settings.animation.transitionDuration;
settings.animation.transitionDuration = '0s';
this.slideshow.jmpress( 'reselect' );
scale = 1;
new_css = {
top: 0,
left: 0,
zoom: 1,
};
// Expand the presentation to fill the lesser of the max width or height
// This avoids content moving past the window for certain window sizes
if ( this.fullscreen ) {
widthScale = $( window ).width() / this.slideshow.width();
heightScale = $( window ).height() / this.slideshow.height();
scale = Math.min( widthScale, heightScale );
new_css.top = ( $( window ).height() - scale * this.slideshow.height() ) / 2;
new_css.left = ( $( window ).width() - scale * this.slideshow.width() ) / 2;
}
// Firefox does not support the zoom property; IE does, but it does not work
// well like in webkit, so we manually transform and position the slideshow
if ( this.slideshow.css( '-moz-transform' ) || this.slideshow.css( '-ms-transform' ) ) {
// Firefox keeps the center of the element in place and expands outward
// so we must shift everything to compensate
new_css.top += ( ( scale - 1 ) * this.slideshow.height() ) / 2;
new_css.left += ( ( scale - 1 ) * this.slideshow.width() ) / 2;
scale = 'scale(' + scale + ')';
$.extend( new_css, {
'-moz-transform': scale,
'-ms-transform': scale,
transform: scale,
} );
} else {
// webkit scales everything with zoom so we need to offset the right amount
// so that the content is vertically centered after scaling effects
new_css.top /= scale;
new_css.left /= scale;
new_css.zoom = scale;
}
this.slideshow.css( new_css );
settings.animation.transitionDuration = duration;
this.slideshow.jmpress( 'reselect' );
},
setFullscreen: function ( on ) {
this.fullscreen = on;
this.setAutoplay( false );
// Save the scroll positions before going into fullscreen mode
if ( on ) {
this.scrollVert = $( window ).scrollTop();
this.scrollHoriz = $( window ).scrollLeft();
// Chrome Bug: Force scroll to be at top
// otherwise the presentation can end up offscreen
$( window ).scrollTop( 0 );
$( window ).scrollLeft( 0 );
}
$( 'html' ).toggleClass( 'presentation-global-fullscreen', on );
$( 'body' ).toggleClass( 'presentation-global-fullscreen', on );
this.wrapper.toggleClass( 'presentation-wrapper-fullscreen', on );
this.wrapper.parents().each( function ( i, e ) {
$( e ).toggleClass( 'presentation-wrapper-fullscreen-parent', on );
} );
this.resizePresentation();
// Reset the scroll positions after exiting fullscreen mode
if ( ! on ) {
$( window ).scrollTop( this.scrollVert );
$( window ).scrollLeft( this.scrollHoriz );
}
},
setAutoplay: function ( on ) {
var _self = this,
newAutoplayTime;
if ( _self.autoPlaying === on ) {
return;
}
newAutoplayTime = on && _self.autoplayTime > 0 ? _self.autoplayTime : 0;
_self.slideshow.jmpress( 'settings' ).duration.defaultValue = newAutoplayTime;
// Move to the next slide when activating autoplay
if ( newAutoplayTime ) {
_self.slideshow.jmpress( 'next' );
_self.overlay.css( 'opacity', 0 );
} else {
_self.slideshow.jmpress( 'reselect' );
}
_self.autoPlaying = on;
},
} );
$( document ).ready( function () {
$( '.presentation-wrapper' ).map( function () {
new Presentation( this );
} );
} );
} )( jQuery );