573 lines
18 KiB
JavaScript
573 lines
18 KiB
JavaScript
/*
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* Twenty Fourteen Featured Content Slider
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*
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* Adapted from FlexSlider v2.2.0, copyright 2012 WooThemes
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* @link http://www.woothemes.com/flexslider/
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*/
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( function( $ ) {
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// FeaturedSlider: object instance.
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$.featuredslider = function( el, options ) {
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var slider = $( el );
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// Make variables public.
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slider.vars = $.extend( {}, $.featuredslider.defaults, options );
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var namespace = slider.vars.namespace,
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msGesture = window.navigator && window.navigator.msPointerEnabled && window.MSGesture,
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touch = ( ( 'ontouchstart' in window ) || msGesture || window.DocumentTouch && document instanceof DocumentTouch ),
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eventType = 'click touchend MSPointerUp',
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watchedEvent = '',
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watchedEventClearTimer,
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methods = {},
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focused = true;
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// Store a reference to the slider object.
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$.data( el, 'featuredslider', slider );
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// Private slider methods.
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methods = {
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init: function() {
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slider.animating = false;
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slider.currentSlide = 0;
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slider.animatingTo = slider.currentSlide;
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slider.atEnd = ( slider.currentSlide === 0 || slider.currentSlide === slider.last );
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slider.containerSelector = slider.vars.selector.substr( 0, slider.vars.selector.search( ' ' ) );
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slider.slides = $( slider.vars.selector, slider );
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slider.container = $( slider.containerSelector, slider );
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slider.count = slider.slides.length;
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slider.prop = 'marginLeft';
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slider.args = {};
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// TOUCH
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slider.transitions = ( function() {
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var obj = document.createElement( 'div' ),
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props = ['perspectiveProperty', 'WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective'];
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for ( var i in props ) {
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if ( obj.style[ props[i] ] !== undefined ) {
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slider.pfx = props[i].replace( 'Perspective', '' ).toLowerCase();
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slider.prop = '-' + slider.pfx + '-transform';
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return true;
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}
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}
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return false;
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}() );
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// CONTROLSCONTAINER
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if ( slider.vars.controlsContainer !== '' )
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slider.controlsContainer = $( slider.vars.controlsContainer ).length > 0 && $( slider.vars.controlsContainer );
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slider.doMath();
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// INIT
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slider.setup( 'init' );
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// CONTROLNAV
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methods.controlNav.setup();
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// DIRECTIONNAV
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methods.directionNav.setup();
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// KEYBOARD
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if ( $( slider.containerSelector ).length === 1 ) {
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$( document ).bind( 'keyup', function( event ) {
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var keycode = event.keyCode;
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if ( ! slider.animating && ( keycode === 39 || keycode === 37 ) ) {
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var target = ( keycode === 39 ) ? slider.getTarget( 'next' ) : ( keycode === 37 ) ? slider.getTarget( 'prev' ) : false;
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slider.featureAnimate( target );
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}
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} );
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}
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// TOUCH
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if ( touch )
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methods.touch();
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$( window ).bind( 'resize orientationchange focus', methods.resize );
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slider.find( 'img' ).attr( 'draggable', 'false' );
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},
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controlNav: {
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setup: function() {
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methods.controlNav.setupPaging();
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},
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setupPaging: function() {
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var type = 'control-paging',
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j = 1,
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item,
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slide;
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slider.controlNavScaffold = $( '<ol class="' + namespace + 'control-nav ' + namespace + type + '"></ol>' );
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if ( slider.pagingCount > 1 ) {
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for ( var i = 0; i < slider.pagingCount; i++ ) {
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slide = slider.slides.eq( i );
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item = '<a>' + j + '</a>';
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slider.controlNavScaffold.append( '<li>' + item + '</li>' );
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j++;
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}
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}
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// CONTROLSCONTAINER
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( slider.controlsContainer ) ? $( slider.controlsContainer ).append( slider.controlNavScaffold ) : slider.append( slider.controlNavScaffold );
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methods.controlNav.set();
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methods.controlNav.active();
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slider.controlNavScaffold.delegate( 'a, img', eventType, function( event ) {
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event.preventDefault();
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if ( watchedEvent === '' || watchedEvent === event.type ) {
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var $this = $( this ),
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target = slider.controlNav.index( $this );
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if ( ! $this.hasClass( namespace + 'active' ) ) {
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slider.direction = ( target > slider.currentSlide ) ? 'next' : 'prev';
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slider.featureAnimate( target );
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}
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}
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// Set up flags to prevent event duplication.
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if ( watchedEvent === '' )
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watchedEvent = event.type;
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methods.setToClearWatchedEvent();
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} );
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},
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set: function() {
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var selector = 'a';
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slider.controlNav = $( '.' + namespace + 'control-nav li ' + selector, ( slider.controlsContainer ) ? slider.controlsContainer : slider );
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},
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active: function() {
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slider.controlNav.removeClass( namespace + 'active' ).eq( slider.animatingTo ).addClass( namespace + 'active' );
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},
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update: function( action, pos ) {
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if ( slider.pagingCount > 1 && action === 'add' ) {
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slider.controlNavScaffold.append( $( '<li><a>' + slider.count + '</a></li>' ) );
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} else if ( slider.pagingCount === 1 ) {
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slider.controlNavScaffold.find( 'li' ).remove();
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} else {
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slider.controlNav.eq( pos ).closest( 'li' ).remove();
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}
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methods.controlNav.set();
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( slider.pagingCount > 1 && slider.pagingCount !== slider.controlNav.length ) ? slider.update( pos, action ) : methods.controlNav.active();
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}
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},
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directionNav: {
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setup: function() {
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var directionNavScaffold = $( '<ul class="' + namespace + 'direction-nav"><li><a class="' + namespace + 'prev" href="#">' + slider.vars.prevText + '</a></li><li><a class="' + namespace + 'next" href="#">' + slider.vars.nextText + '</a></li></ul>' );
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// CONTROLSCONTAINER
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if ( slider.controlsContainer ) {
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$( slider.controlsContainer ).append( directionNavScaffold );
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slider.directionNav = $( '.' + namespace + 'direction-nav li a', slider.controlsContainer );
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} else {
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slider.append( directionNavScaffold );
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slider.directionNav = $( '.' + namespace + 'direction-nav li a', slider );
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}
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methods.directionNav.update();
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slider.directionNav.bind( eventType, function( event ) {
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event.preventDefault();
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var target;
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if ( watchedEvent === '' || watchedEvent === event.type ) {
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target = ( $( this ).hasClass( namespace + 'next' ) ) ? slider.getTarget( 'next' ) : slider.getTarget( 'prev' );
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slider.featureAnimate( target );
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}
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// Set up flags to prevent event duplication.
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if ( watchedEvent === '' )
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watchedEvent = event.type;
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methods.setToClearWatchedEvent();
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} );
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},
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update: function() {
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var disabledClass = namespace + 'disabled';
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if ( slider.pagingCount === 1 ) {
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slider.directionNav.addClass( disabledClass ).attr( 'tabindex', '-1' );
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} else {
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slider.directionNav.removeClass( disabledClass ).removeAttr( 'tabindex' );
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}
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}
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},
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touch: function() {
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var startX,
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startY,
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offset,
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cwidth,
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dx,
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startT,
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scrolling = false,
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localX = 0,
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localY = 0,
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accDx = 0;
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if ( ! msGesture ) {
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el.addEventListener( 'touchstart', onTouchStart, false );
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function onTouchStart( e ) {
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if ( slider.animating ) {
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e.preventDefault();
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} else if ( ( window.navigator.msPointerEnabled ) || e.touches.length === 1 ) {
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cwidth = slider.w;
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startT = Number( new Date() );
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// Local vars for X and Y points.
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localX = e.touches[0].pageX;
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localY = e.touches[0].pageY;
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offset = ( slider.animatingTo === slider.last ) ? 0 :
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( slider.currentSlide === slider.last ) ? slider.limit : ( slider.currentSlide + slider.cloneOffset ) * cwidth;
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startX = localX;
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startY = localY;
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el.addEventListener( 'touchmove', onTouchMove, false );
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el.addEventListener( 'touchend', onTouchEnd, false );
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}
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}
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function onTouchMove( e ) {
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// Local vars for X and Y points.
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localX = e.touches[0].pageX;
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localY = e.touches[0].pageY;
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dx = startX - localX;
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scrolling = Math.abs( dx ) < Math.abs( localY - startY );
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var fxms = 500;
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if ( ! scrolling || Number( new Date() ) - startT > fxms ) {
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e.preventDefault();
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if ( slider.transitions ) {
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slider.setProps( offset + dx, 'setTouch' );
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}
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}
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}
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function onTouchEnd( e ) {
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// Finish the touch by undoing the touch session.
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el.removeEventListener( 'touchmove', onTouchMove, false );
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if ( slider.animatingTo === slider.currentSlide && ! scrolling && ! ( dx === null ) ) {
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var updateDx = dx,
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target = ( updateDx > 0 ) ? slider.getTarget( 'next' ) : slider.getTarget( 'prev' );
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slider.featureAnimate( target );
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}
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el.removeEventListener( 'touchend', onTouchEnd, false );
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startX = null;
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startY = null;
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dx = null;
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offset = null;
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}
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} else {
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el.style.msTouchAction = 'none';
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el._gesture = new MSGesture();
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el._gesture.target = el;
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el.addEventListener( 'MSPointerDown', onMSPointerDown, false );
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el._slider = slider;
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el.addEventListener( 'MSGestureChange', onMSGestureChange, false );
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el.addEventListener( 'MSGestureEnd', onMSGestureEnd, false );
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function onMSPointerDown( e ) {
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e.stopPropagation();
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if ( slider.animating ) {
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e.preventDefault();
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} else {
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el._gesture.addPointer( e.pointerId );
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accDx = 0;
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cwidth = slider.w;
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startT = Number( new Date() );
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offset = ( slider.animatingTo === slider.last ) ? 0 : ( slider.currentSlide === slider.last ) ? slider.limit : ( slider.currentSlide + slider.cloneOffset ) * cwidth;
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}
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}
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function onMSGestureChange( e ) {
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e.stopPropagation();
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var slider = e.target._slider;
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if ( ! slider )
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return;
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var transX = -e.translationX,
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transY = -e.translationY;
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// Accumulate translations.
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accDx = accDx + transX;
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dx = accDx;
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scrolling = Math.abs( accDx ) < Math.abs( -transY );
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if ( e.detail === e.MSGESTURE_FLAG_INERTIA ) {
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setImmediate( function () {
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el._gesture.stop();
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} );
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return;
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}
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if ( ! scrolling || Number( new Date() ) - startT > 500 ) {
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e.preventDefault();
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if ( slider.transitions ) {
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slider.setProps( offset + dx, 'setTouch' );
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}
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}
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}
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function onMSGestureEnd( e ) {
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e.stopPropagation();
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var slider = e.target._slider;
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if ( ! slider )
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return;
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if ( slider.animatingTo === slider.currentSlide && ! scrolling && ! ( dx === null ) ) {
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var updateDx = dx,
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target = ( updateDx > 0 ) ? slider.getTarget( 'next' ) : slider.getTarget( 'prev' );
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slider.featureAnimate( target );
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}
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startX = null;
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startY = null;
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dx = null;
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offset = null;
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accDx = 0;
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}
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}
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},
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resize: function() {
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if ( ! slider.animating && slider.is( ':visible' ) ) {
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slider.doMath();
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// SMOOTH HEIGHT
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methods.smoothHeight();
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slider.newSlides.width( slider.computedW );
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slider.setProps( slider.computedW, 'setTotal' );
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}
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},
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smoothHeight: function( dur ) {
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var $obj = slider.viewport;
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( dur ) ? $obj.animate( { 'height': slider.slides.eq( slider.animatingTo ).height() }, dur ) : $obj.height( slider.slides.eq( slider.animatingTo ).height() );
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},
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setToClearWatchedEvent: function() {
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clearTimeout( watchedEventClearTimer );
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watchedEventClearTimer = setTimeout( function() {
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watchedEvent = '';
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}, 3000 );
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}
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};
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// Public methods.
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slider.featureAnimate = function( target ) {
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if ( target !== slider.currentSlide )
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slider.direction = ( target > slider.currentSlide ) ? 'next' : 'prev';
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if ( ! slider.animating && slider.is( ':visible' ) ) {
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slider.animating = true;
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slider.animatingTo = target;
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// CONTROLNAV
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methods.controlNav.active();
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slider.slides.removeClass( namespace + 'active-slide' ).eq( target ).addClass( namespace + 'active-slide' );
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slider.atEnd = target === 0 || target === slider.last;
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// DIRECTIONNAV
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methods.directionNav.update();
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var dimension = slider.computedW,
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margin, slideString, calcNext;
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if ( slider.currentSlide === 0 && target === slider.count - 1 && slider.direction !== 'next' ) {
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slideString = 0;
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} else if ( slider.currentSlide === slider.last && target === 0 && slider.direction !== 'prev' ) {
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slideString = ( slider.count + 1 ) * dimension;
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} else {
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slideString = ( target + slider.cloneOffset ) * dimension;
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}
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slider.setProps( slideString, '', slider.vars.animationSpeed );
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if ( slider.transitions ) {
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if ( ! slider.atEnd ) {
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slider.animating = false;
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slider.currentSlide = slider.animatingTo;
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}
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slider.container.unbind( 'webkitTransitionEnd transitionend' );
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slider.container.bind( 'webkitTransitionEnd transitionend', function() {
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slider.wrapup( dimension );
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} );
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} else {
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slider.container.animate( slider.args, slider.vars.animationSpeed, 'swing', function() {
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slider.wrapup( dimension );
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} );
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}
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// SMOOTH HEIGHT
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methods.smoothHeight( slider.vars.animationSpeed );
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}
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};
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slider.wrapup = function( dimension ) {
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if ( slider.currentSlide === 0 && slider.animatingTo === slider.last ) {
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slider.setProps( dimension, 'jumpEnd' );
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} else if ( slider.currentSlide === slider.last && slider.animatingTo === 0 ) {
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slider.setProps( dimension, 'jumpStart' );
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}
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slider.animating = false;
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slider.currentSlide = slider.animatingTo;
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};
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slider.getTarget = function( dir ) {
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slider.direction = dir;
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if ( dir === 'next' ) {
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return ( slider.currentSlide === slider.last ) ? 0 : slider.currentSlide + 1;
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} else {
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return ( slider.currentSlide === 0 ) ? slider.last : slider.currentSlide - 1;
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}
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};
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slider.setProps = function( pos, special, dur ) {
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var target = ( function() {
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var posCheck = ( pos ) ? pos : slider.itemW * slider.animatingTo,
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posCalc = ( function() {
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switch ( special ) {
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case 'setTotal': return ( slider.currentSlide + slider.cloneOffset ) * pos;
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case 'setTouch': return pos;
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case 'jumpEnd': return slider.count * pos;
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case 'jumpStart': return pos;
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default: return pos;
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}
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}() );
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return ( posCalc * -1 ) + 'px';
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}() );
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if ( slider.transitions ) {
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target = 'translate3d(' + target + ',0,0 )';
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dur = ( dur !== undefined ) ? ( dur / 1000 ) + 's' : '0s';
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slider.container.css( '-' + slider.pfx + '-transition-duration', dur );
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}
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slider.args[slider.prop] = target;
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if ( slider.transitions || dur === undefined )
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slider.container.css( slider.args );
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};
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slider.setup = function( type ) {
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var sliderOffset, arr;
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if ( type === 'init' ) {
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slider.viewport = $( '<div class="' + namespace + 'viewport"></div>' ).css( { 'overflow': 'hidden', 'position': 'relative' } ).appendTo( slider ).append( slider.container );
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slider.cloneCount = 0;
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slider.cloneOffset = 0;
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}
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slider.cloneCount = 2;
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slider.cloneOffset = 1;
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// Clear out old clones.
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if ( type !== 'init' )
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slider.container.find( '.clone' ).remove();
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slider.container.append( slider.slides.first().clone().addClass( 'clone' ).attr( 'aria-hidden', 'true' ) ).prepend( slider.slides.last().clone().addClass( 'clone' ).attr( 'aria-hidden', 'true' ) );
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slider.newSlides = $( slider.vars.selector, slider );
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sliderOffset = slider.currentSlide + slider.cloneOffset;
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slider.container.width( ( slider.count + slider.cloneCount ) * 200 + '%' );
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slider.setProps( sliderOffset * slider.computedW, 'init' );
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setTimeout( function() {
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slider.doMath();
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slider.newSlides.css( { 'width': slider.computedW, 'float': 'left', 'display': 'block' } );
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// SMOOTH HEIGHT
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methods.smoothHeight();
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}, ( type === 'init' ) ? 100 : 0 );
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slider.slides.removeClass( namespace + 'active-slide' ).eq( slider.currentSlide ).addClass( namespace + 'active-slide' );
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};
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slider.doMath = function() {
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var slide = slider.slides.first();
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slider.w = ( slider.viewport===undefined ) ? slider.width() : slider.viewport.width();
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slider.h = slide.height();
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slider.boxPadding = slide.outerWidth() - slide.width();
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slider.itemW = slider.w;
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slider.pagingCount = slider.count;
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slider.last = slider.count - 1;
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slider.computedW = slider.itemW - slider.boxPadding;
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};
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slider.update = function( pos, action ) {
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slider.doMath();
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// Update currentSlide and slider.animatingTo if necessary.
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if ( pos < slider.currentSlide ) {
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slider.currentSlide += 1;
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} else if ( pos <= slider.currentSlide && pos !== 0 ) {
|
|
slider.currentSlide -= 1;
|
|
}
|
|
slider.animatingTo = slider.currentSlide;
|
|
|
|
// Update controlNav.
|
|
if ( action === 'add' || slider.pagingCount > slider.controlNav.length ) {
|
|
methods.controlNav.update( 'add' );
|
|
} else if ( action === 'remove' || slider.pagingCount < slider.controlNav.length ) {
|
|
if ( slider.currentSlide > slider.last ) {
|
|
slider.currentSlide -= 1;
|
|
slider.animatingTo -= 1;
|
|
}
|
|
methods.controlNav.update( 'remove', slider.last );
|
|
}
|
|
// Update directionNav.
|
|
methods.directionNav.update();
|
|
};
|
|
|
|
// FeaturedSlider: initialize.
|
|
methods.init();
|
|
};
|
|
|
|
// Ensure the slider isn't focused if the window loses focus.
|
|
$( window ).blur( function ( e ) {
|
|
focused = false;
|
|
} ).focus( function ( e ) {
|
|
focused = true;
|
|
} );
|
|
|
|
// Default settings.
|
|
$.featuredslider.defaults = {
|
|
namespace: 'slider-', // String: prefix string attached to the class of every element generated by the plugin.
|
|
selector: '.slides > li', // String: selector, must match a simple pattern.
|
|
animationSpeed: 600, // Integer: Set the speed of animations, in milliseconds.
|
|
controlsContainer: '', // jQuery Object/Selector: container navigation to append elements.
|
|
|
|
// Text labels: @todo allow translation
|
|
prevText: 'Previous', // String: Set the text for the "previous" directionNav item.
|
|
nextText: 'Next' // String: Set the text for the "next" directionNav item.
|
|
};
|
|
|
|
// FeaturedSlider: plugin function.
|
|
$.fn.featuredslider = function( options ) {
|
|
if ( options === undefined )
|
|
options = {};
|
|
|
|
if ( typeof options === 'object' ) {
|
|
return this.each( function() {
|
|
var $this = $( this ),
|
|
selector = ( options.selector ) ? options.selector : '.slides > li',
|
|
$slides = $this.find( selector );
|
|
|
|
if ( $slides.length === 1 || $slides.length === 0 ) {
|
|
$slides.fadeIn( 400 );
|
|
} else if ( $this.data( 'featuredslider' ) === undefined ) {
|
|
new $.featuredslider( this, options );
|
|
}
|
|
} );
|
|
}
|
|
};
|
|
} )( jQuery );
|