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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 );