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