Team:HIT-Harbin/js/jquery.flexslider.js

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Revision as of 15:43, 16 September 2013 by Lanqiao (Talk | contribs)
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/*

* jQuery FlexSlider v1.8
* http://www.woothemes.com/flexslider/
*
* Copyright 2012 WooThemes
* Free to use under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*
* Contributing Author: Tyler Smith
*/
(function ($) {
 //FlexSlider: Object Instance
 $.flexslider = function(el, options) {
   var slider = $(el);
   
   // slider DOM reference for use outside of the plugin
   $.data(el, "flexslider", slider);
   slider.init = function() {
     slider.vars = $.extend({}, $.flexslider.defaults, options);
     $.data(el, 'flexsliderInit', true);

slider.container = $('.slides', slider).eq(0); slider.slides = $('.slides:first > li', slider);

     slider.count = slider.slides.length;
     slider.animating = false;
     slider.currentSlide = slider.vars.slideToStart;
     slider.animatingTo = slider.currentSlide;
     slider.atEnd = (slider.currentSlide == 0) ? true : false;
     slider.eventType = ('ontouchstart' in document.documentElement) ? 'touchstart' : 'click';
     slider.cloneCount = 0;
     slider.cloneOffset = 0;
     slider.manualPause = false;
     slider.vertical = (slider.vars.slideDirection == "vertical");
     slider.prop = (slider.vertical) ? "top" : "marginLeft";
     slider.args = {};
     
     //Test for webbkit CSS3 Animations
     slider.transitions = "webkitTransition" in document.body.style && slider.vars.useCSS;
     if (slider.transitions) slider.prop = "-webkit-transform";
     
     //Test for controlsContainer
     if (slider.vars.controlsContainer != "") {
       slider.controlsContainer = $(slider.vars.controlsContainer).eq($('.slides').index(slider.container));
       slider.containerExists = slider.controlsContainer.length > 0;
     }
     //Test for manualControls
     if (slider.vars.manualControls != "") {
       slider.manualControls = $(slider.vars.manualControls, ((slider.containerExists) ? slider.controlsContainer : slider));
       slider.manualExists = slider.manualControls.length > 0;
     }
     
     ///////////////////////////////////////////////////////////////////
     // FlexSlider: Randomize Slides
     if (slider.vars.randomize) {
       slider.slides.sort(function() { return (Math.round(Math.random())-0.5); });
       slider.container.empty().append(slider.slides);
     }
     ///////////////////////////////////////////////////////////////////
     
     ///////////////////////////////////////////////////////////////////
     // FlexSlider: Slider Animation Initialize
     if (slider.vars.animation.toLowerCase() == "slide") {
       if (slider.transitions) {
         slider.setTransition(0);
       }
       slider.css({"overflow": "hidden"});
       if (slider.vars.animationLoop) {
         slider.cloneCount = 2;
         slider.cloneOffset = 1;
         slider.container.append(slider.slides.filter(':first').clone().addClass('clone')).prepend(slider.slides.filter(':last').clone().addClass('clone'));
       }
       //create newSlides to capture possible clones

slider.newSlides = $('.slides:first > li', slider);

       var sliderOffset = (-1 * (slider.currentSlide + slider.cloneOffset));
       if (slider.vertical) {
         slider.newSlides.css({"display": "block", "width": "100%", "float": "left"});
         slider.container.height((slider.count + slider.cloneCount) * 200 + "%").css("position", "absolute").width("100%");
         //Timeout function to give browser enough time to get proper height initially
         setTimeout(function() {
           slider.css({"position": "relative"}).height(slider.slides.filter(':first').height());
           slider.args[slider.prop] = (slider.transitions) ? "translate3d(0," + sliderOffset * slider.height() + "px,0)" : sliderOffset * slider.height() + "px";
           slider.container.css(slider.args);
         }, 100);
       } else {
         slider.args[slider.prop] = (slider.transitions) ? "translate3d(" + sliderOffset * slider.width() + "px,0,0)" : sliderOffset * slider.width() + "px";
         slider.container.width((slider.count + slider.cloneCount) * 200 + "%").css(slider.args);
         //Timeout function to give browser enough time to get proper width initially
         setTimeout(function() {
           slider.newSlides.width(slider.width()).css({"float": "left", "display": "block"});
         }, 100);
       }
       
     } else { //Default to fade
       //Not supporting fade CSS3 transitions right now
       slider.transitions = false;
       slider.slides.css({"width": "100%", "float": "left", "marginRight": "-100%"}).eq(slider.currentSlide).fadeIn(slider.vars.animationDuration); 
     }
     ///////////////////////////////////////////////////////////////////
     
     ///////////////////////////////////////////////////////////////////
     // FlexSlider: Control Nav
     if (slider.vars.controlNav) {
       if (slider.manualExists) {
         slider.controlNav = slider.manualControls;
       } else {
var controlNavScaffold = $('
    ');
             var j = 1;
             for (var i = 0; i < slider.count; i++) {
    
    controlNavScaffold.append('
  1. <a>' + j + '</a></li>'); j++; } if (slider.containerExists) { $(slider.controlsContainer).append(controlNavScaffold); slider.controlNav = $('.flex-control-nav li a', slider.controlsContainer); } else { slider.append(controlNavScaffold); slider.controlNav = $('.flex-control-nav li a', slider); } } slider.controlNav.eq(slider.currentSlide).addClass('active'); slider.controlNav.bind(slider.eventType, function(event) { event.preventDefault(); if (!$(this).hasClass('active')) { (slider.controlNav.index($(this)) > slider.currentSlide) ? slider.direction = "next" : slider.direction = "prev"; slider.flexAnimate(slider.controlNav.index($(this)), slider.vars.pauseOnAction); } }); } /////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// //FlexSlider: Direction Nav if (slider.vars.directionNav) { var directionNavScaffold = $('
    • <a class="prev" href="#">' + slider.vars.prevText + '</a>
    • <a class="next" href="#">' + slider.vars.nextText + '</a>
    ');
           if (slider.containerExists) {
             $(slider.controlsContainer).append(directionNavScaffold);
             slider.directionNav = $('.flex-direction-nav li a', slider.controlsContainer);
           } else {
             slider.append(directionNavScaffold);
             slider.directionNav = $('.flex-direction-nav li a', slider);
           }
           
           //Set initial disable styles if necessary
           if (!slider.vars.animationLoop) {
             if (slider.currentSlide == 0) {
               slider.directionNav.filter('.prev').addClass('disabled');
             } else if (slider.currentSlide == slider.count - 1) {
               slider.directionNav.filter('.next').addClass('disabled');
             }
           }
           
           slider.directionNav.bind(slider.eventType, function(event) {
             event.preventDefault();
             var target = ($(this).hasClass('next')) ? slider.getTarget('next') : slider.getTarget('prev');
             
             if (slider.canAdvance(target)) {
               slider.flexAnimate(target, slider.vars.pauseOnAction);
             }
           });
         }
         //////////////////////////////////////////////////////////////////
         
         //////////////////////////////////////////////////////////////////
         //FlexSlider: Keyboard Nav
         if (slider.vars.keyboardNav && $('ul.slides').length == 1) {
           function keyboardMove(event) {
             if (slider.animating) {
               return;
             } else if (event.keyCode != 39 && event.keyCode != 37){
               return;
             } else {
               if (event.keyCode == 39) {
                 var target = slider.getTarget('next');
               } else if (event.keyCode == 37){
                 var target = slider.getTarget('prev');
               }
           
               if (slider.canAdvance(target)) {
                 slider.flexAnimate(target, slider.vars.pauseOnAction);
               }
             }
           }
           $(document).bind('keyup', keyboardMove);
         }
         //////////////////////////////////////////////////////////////////
         
         ///////////////////////////////////////////////////////////////////
         // FlexSlider: Mousewheel interaction
         if (slider.vars.mousewheel) {
           slider.mousewheelEvent = (/Firefox/i.test(navigator.userAgent)) ? "DOMMouseScroll" : "mousewheel";
           slider.bind(slider.mousewheelEvent, function(e) {
             e.preventDefault();
             e = e ? e : window.event;
             var wheelData = e.detail ? e.detail * -1 : e.originalEvent.wheelDelta / 40,
                 target = (wheelData < 0) ? slider.getTarget('next') : slider.getTarget('prev');
             
             if (slider.canAdvance(target)) {
               slider.flexAnimate(target, slider.vars.pauseOnAction);
             }
           });
         }
         ///////////////////////////////////////////////////////////////////
         
         //////////////////////////////////////////////////////////////////
         //FlexSlider: Slideshow Setup
         if (slider.vars.slideshow) {
           //pauseOnHover
           if (slider.vars.pauseOnHover && slider.vars.slideshow) {
             slider.hover(function() {
               slider.pause();
             }, function() {
               if (!slider.manualPause) {
                 slider.resume();
               }
             });
           }
    
           //Initialize animation
           slider.animatedSlides = setInterval(slider.animateSlides, slider.vars.slideshowSpeed);
         }
         //////////////////////////////////////////////////////////////////
         
         //////////////////////////////////////////////////////////////////
         //FlexSlider: Pause/Play
         if (slider.vars.pausePlay) {
    
    var pausePlayScaffold = $('
    ');
           if (slider.containerExists) {
             slider.controlsContainer.append(pausePlayScaffold);
             slider.pausePlay = $('.flex-pauseplay span', slider.controlsContainer);
           } else {
             slider.append(pausePlayScaffold);
             slider.pausePlay = $('.flex-pauseplay span', slider);
           }
           
           var pausePlayState = (slider.vars.slideshow) ? 'pause' : 'play';
           slider.pausePlay.addClass(pausePlayState).text((pausePlayState == 'pause') ? slider.vars.pauseText : slider.vars.playText);
           
           slider.pausePlay.bind(slider.eventType, function(event) {
             event.preventDefault();
             if ($(this).hasClass('pause')) {
               slider.pause();
               slider.manualPause = true;
             } else {
               slider.resume();
               slider.manualPause = false;
             }
           });
         }
         //////////////////////////////////////////////////////////////////
         
         //////////////////////////////////////////////////////////////////
         //FlexSlider:Touch Swip Gestures
         //Some brilliant concepts adapted from the following sources
         //Source: TouchSwipe - http://www.netcu.de/jquery-touchwipe-iphone-ipad-library
         //Source: SwipeJS - http://swipejs.com
         if ('ontouchstart' in document.documentElement && slider.vars.touch) {
           //For brevity, variables are named for x-axis scrolling
           //The variables are then swapped if vertical sliding is applied
           //This reduces redundant code...I think :)
           //If debugging, recognize variables are named for horizontal scrolling
           var startX,
             startY,
             offset,
             cwidth,
             dx,
             startT,
             scrolling = false;
                 
           slider.each(function() {
             if ('ontouchstart' in document.documentElement) {
               this.addEventListener('touchstart', onTouchStart, false);
             }
           });
           
           function onTouchStart(e) {
             if (slider.animating) {
               e.preventDefault();
             } else if (e.touches.length == 1) {
               slider.pause();
               cwidth = (slider.vertical) ? slider.height() : slider.width();
               startT = Number(new Date());
               offset = (slider.vertical) ? (slider.currentSlide + slider.cloneOffset) * slider.height() : (slider.currentSlide + slider.cloneOffset) * slider.width();
               startX = (slider.vertical) ? e.touches[0].pageY : e.touches[0].pageX;
               startY = (slider.vertical) ? e.touches[0].pageX : e.touches[0].pageY;
               slider.setTransition(0);
    
               this.addEventListener('touchmove', onTouchMove, false);
               this.addEventListener('touchend', onTouchEnd, false);
             }
           }
    
           function onTouchMove(e) {
             dx = (slider.vertical) ? startX - e.touches[0].pageY : startX - e.touches[0].pageX;
             scrolling = (slider.vertical) ? (Math.abs(dx) < Math.abs(e.touches[0].pageX - startY)) : (Math.abs(dx) < Math.abs(e.touches[0].pageY - startY));
    
             if (!scrolling) {
               e.preventDefault();
               if (slider.vars.animation == "slide" && slider.transitions) {
                 if (!slider.vars.animationLoop) {
                   dx = dx/((slider.currentSlide == 0 && dx < 0 || slider.currentSlide == slider.count - 1 && dx > 0) ? (Math.abs(dx)/cwidth+2) : 1);
                 }
                 slider.args[slider.prop] = (slider.vertical) ? "translate3d(0," + (-offset - dx) + "px,0)": "translate3d(" + (-offset - dx) + "px,0,0)";
                 slider.container.css(slider.args);
               }
             }
           }
           
           function onTouchEnd(e) {
             slider.animating = false;
             if (slider.animatingTo == slider.currentSlide && !scrolling && !(dx == null)) {
               var target = (dx > 0) ? slider.getTarget('next') : slider.getTarget('prev');
               if (slider.canAdvance(target) && Number(new Date()) - startT < 550 && Math.abs(dx) > 20 || Math.abs(dx) > cwidth/2) {
                 slider.flexAnimate(target, slider.vars.pauseOnAction);
               } else if (slider.vars.animation !== "fade") {
                 slider.flexAnimate(slider.currentSlide, slider.vars.pauseOnAction);
               }
             }
             
             //Finish the touch by undoing the touch session
             this.removeEventListener('touchmove', onTouchMove, false);
             this.removeEventListener('touchend', onTouchEnd, false);
             startX = null;
             startY = null;
             dx = null;
             offset = null;
           }
         }
         //////////////////////////////////////////////////////////////////
         
         //////////////////////////////////////////////////////////////////
         //FlexSlider: Resize Functions (If necessary)
         if (slider.vars.animation.toLowerCase() == "slide") {
           $(window).resize(function(){
             if (!slider.animating && slider.is(":visible")) {
               if (slider.vertical) {
                 slider.height(slider.slides.filter(':first').height());
                 slider.args[slider.prop] = (-1 * (slider.currentSlide + slider.cloneOffset))* slider.slides.filter(':first').height() + "px";
                 if (slider.transitions) {
                   slider.setTransition(0);
                   slider.args[slider.prop] = (slider.vertical) ? "translate3d(0," + slider.args[slider.prop] + ",0)" : "translate3d(" + slider.args[slider.prop] + ",0,0)";
                 }
                 slider.container.css(slider.args);
               } else {
                 slider.newSlides.width(slider.width());
                 slider.args[slider.prop] = (-1 * (slider.currentSlide + slider.cloneOffset))* slider.width() + "px";
                 if (slider.transitions) {
                   slider.setTransition(0);
                   slider.args[slider.prop] = (slider.vertical) ? "translate3d(0," + slider.args[slider.prop] + ",0)" : "translate3d(" + slider.args[slider.prop] + ",0,0)";
                 }
                 slider.container.css(slider.args);
               }
             }
           });
         }
         //////////////////////////////////////////////////////////////////
         
         //FlexSlider: start() Callback
         slider.vars.start(slider);
       }
       
       //FlexSlider: Animation Actions
       slider.flexAnimate = function(target, pause) {
         if (!slider.animating && slider.is(":visible")) {
           //Animating flag
           slider.animating = true;
           
           //FlexSlider: before() animation Callback
           slider.animatingTo = target;
           slider.vars.before(slider);
           
           //Optional paramter to pause slider when making an anmiation call
           if (pause) {
             slider.pause();
           }
           
           //Update controlNav   
           if (slider.vars.controlNav) {
             slider.controlNav.removeClass('active').eq(target).addClass('active');
           }
           
           //Is the slider at either end
           slider.atEnd = (target == 0 || target == slider.count - 1) ? true : false;
           if (!slider.vars.animationLoop && slider.vars.directionNav) {
             if (target == 0) {
               slider.directionNav.removeClass('disabled').filter('.prev').addClass('disabled');
             } else if (target == slider.count - 1) {
               slider.directionNav.removeClass('disabled').filter('.next').addClass('disabled');
             } else {
               slider.directionNav.removeClass('disabled');
             }
           }
           
           if (!slider.vars.animationLoop && target == slider.count - 1) {
             slider.pause();
             //FlexSlider: end() of cycle Callback
             slider.vars.end(slider);
           }
           
           if (slider.vars.animation.toLowerCase() == "slide") {
             var dimension = (slider.vertical) ? slider.slides.filter(':first').height() : slider.slides.filter(':first').width();
             
             if (slider.currentSlide == 0 && target == slider.count - 1 && slider.vars.animationLoop && slider.direction != "next") {
               slider.slideString = "0px";
             } else if (slider.currentSlide == slider.count - 1 && target == 0 && slider.vars.animationLoop && slider.direction != "prev") {
               slider.slideString = (-1 * (slider.count + 1)) * dimension + "px";
             } else {
               slider.slideString = (-1 * (target + slider.cloneOffset)) * dimension + "px";
             }
             slider.args[slider.prop] = slider.slideString;
    
             if (slider.transitions) {
                 slider.setTransition(slider.vars.animationDuration); 
                 slider.args[slider.prop] = (slider.vertical) ? "translate3d(0," + slider.slideString + ",0)" : "translate3d(" + slider.slideString + ",0,0)";
                 slider.container.css(slider.args).one("webkitTransitionEnd transitionend", function(){
                   slider.wrapup(dimension);
                 });   
             } else {
               slider.container.animate(slider.args, slider.vars.animationDuration, function(){
                 slider.wrapup(dimension);
               });
             }
           } else { //Default to Fade
             slider.slides.eq(slider.currentSlide).fadeOut(slider.vars.animationDuration);
             slider.slides.eq(target).fadeIn(slider.vars.animationDuration, function() {
               slider.wrapup();
             });
           }
         }
       }
       
       //FlexSlider: Function to minify redundant animation actions
       slider.wrapup = function(dimension) {
         if (slider.vars.animation == "slide") {
           //Jump the slider if necessary
           if (slider.currentSlide == 0 && slider.animatingTo == slider.count - 1 && slider.vars.animationLoop) {
             slider.args[slider.prop] = (-1 * slider.count) * dimension + "px";
             if (slider.transitions) {
               slider.setTransition(0);
               slider.args[slider.prop] = (slider.vertical) ? "translate3d(0," + slider.args[slider.prop] + ",0)" : "translate3d(" + slider.args[slider.prop] + ",0,0)";
             }
             slider.container.css(slider.args);
           } else if (slider.currentSlide == slider.count - 1 && slider.animatingTo == 0 && slider.vars.animationLoop) {
             slider.args[slider.prop] = -1 * dimension + "px";
             if (slider.transitions) {
               slider.setTransition(0);
               slider.args[slider.prop] = (slider.vertical) ? "translate3d(0," + slider.args[slider.prop] + ",0)" : "translate3d(" + slider.args[slider.prop] + ",0,0)";
             }
             slider.container.css(slider.args);
           }
         }
         slider.animating = false;
         slider.currentSlide = slider.animatingTo;
         //FlexSlider: after() animation Callback
         slider.vars.after(slider);
       }
       
       //FlexSlider: Automatic Slideshow
       slider.animateSlides = function() {
         if (!slider.animating) {
           slider.flexAnimate(slider.getTarget("next"));
         }
       }
       
       //FlexSlider: Automatic Slideshow Pause
       slider.pause = function() {
         clearInterval(slider.animatedSlides);
         if (slider.vars.pausePlay) {
           slider.pausePlay.removeClass('pause').addClass('play').text(slider.vars.playText);
         }
       }
       
       //FlexSlider: Automatic Slideshow Start/Resume
       slider.resume = function() {
         slider.animatedSlides = setInterval(slider.animateSlides, slider.vars.slideshowSpeed);
         if (slider.vars.pausePlay) {
           slider.pausePlay.removeClass('play').addClass('pause').text(slider.vars.pauseText);
         }
       }
       
       //FlexSlider: Helper function for non-looping sliders
       slider.canAdvance = function(target) {
         if (!slider.vars.animationLoop && slider.atEnd) {
           if (slider.currentSlide == 0 && target == slider.count - 1 && slider.direction != "next") {
             return false;
           } else if (slider.currentSlide == slider.count - 1 && target == 0 && slider.direction == "next") {
             return false;
           } else {
             return true;
           }
         } else {
           return true;
         }  
       }
       
       //FlexSlider: Helper function to determine animation target
       slider.getTarget = function(dir) {
         slider.direction = dir;
         if (dir == "next") {
           return (slider.currentSlide == slider.count - 1) ? 0 : slider.currentSlide + 1;
         } else {
           return (slider.currentSlide == 0) ? slider.count - 1 : slider.currentSlide - 1;
         }
       }
       
       //FlexSlider: Helper function to set CSS3 transitions
       slider.setTransition = function(dur) {
         slider.container.css({'-webkit-transition-duration': (dur/1000) + "s"});
       }
    
       //FlexSlider: Initialize
       slider.init();
     }
     
     //FlexSlider: Default Settings
     $.flexslider.defaults = {
       animation: "fade",              //String: Select your animation type, "fade" or "slide"
       slideDirection: "horizontal",   //String: Select the sliding direction, "horizontal" or "vertical"
       slideshow: true,                //Boolean: Animate slider automatically
       slideshowSpeed: 7000,           //Integer: Set the speed of the slideshow cycling, in milliseconds
       animationDuration: 600,         //Integer: Set the speed of animations, in milliseconds
       directionNav: false,             //Boolean: Create navigation for previous/next navigation? (true/false)
       controlNav: true,               //Boolean: Create navigation for paging control of each clide? Note: Leave true for manualControls usage
       keyboardNav: true,              //Boolean: Allow slider navigating via keyboard left/right keys
       mousewheel: false,              //Boolean: Allow slider navigating via mousewheel
       prevText: "Previous",           //String: Set the text for the "previous" directionNav item
       nextText: "Next",               //String: Set the text for the "next" directionNav item
       pausePlay: false,               //Boolean: Create pause/play dynamic element
       pauseText: 'Pause',             //String: Set the text for the "pause" pausePlay item
       playText: 'Play',               //String: Set the text for the "play" pausePlay item
       randomize: false,               //Boolean: Randomize slide order
       slideToStart: 0,                //Integer: The slide that the slider should start on. Array notation (0 = first slide)
       animationLoop: true,            //Boolean: Should the animation loop? If false, directionNav will received "disable" classes at either end
       pauseOnAction: true,            //Boolean: Pause the slideshow when interacting with control elements, highly recommended.
       pauseOnHover: false,            //Boolean: Pause the slideshow when hovering over slider, then resume when no longer hovering
       useCSS: true,                   //Boolean: Override the use of CSS3 Translate3d animations
       touch: true,                    //Boolean: Disable touchswipe events
       controlsContainer: "",          //Selector: Declare which container the navigation elements should be appended too. Default container is the flexSlider element. Example use would be ".flexslider-container", "#container", etc. If the given element is not found, the default action will be taken.
       manualControls: "",             //Selector: Declare custom control navigation. Example would be ".flex-control-nav li" or "#tabs-nav li img", etc. The number of elements in your controlNav should match the number of slides/tabs.
       start: function(){},            //Callback: function(slider) - Fires when the slider loads the first slide
       before: function(){},           //Callback: function(slider) - Fires asynchronously with each slider animation
       after: function(){},            //Callback: function(slider) - Fires after each slider animation completes
       end: function(){}               //Callback: function(slider) - Fires when the slider reaches the last slide (asynchronous)
     }
     
     //FlexSlider: Plugin Function
     $.fn.flexslider = function(options) {
       return this.each(function() {
         var $slides = $(this).find('.slides > li');
         if ($slides.length === 1) {
           $slides.find('.slides > li').fadeIn(400);
           if (options && options.start) options.start($(this));
         }
         else if ($(this).data('flexsliderInit') != true) {
           new $.flexslider(this, options);
         }
       });
     }
     
    

    $(window).load(function() { $('.flexslider').flexslider(); });

    })(jQuery);