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cycle.js
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cycle.js
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/*!
* jQuery Cycle Plugin (with Transition Definitions)
* Examples and documentation at: http://jquery.malsup.com/cycle/
* Copyright (c) 2007-2010 M. Alsup
* Version: 2.9999 (13-NOV-2011)
* Dual licensed under the MIT and GPL licenses.
* http://jquery.malsup.com/license.html
* Requires: jQuery v1.3.2 or later
*/
;(function($, undefined) {
var ver = '2.9999';
// if $.support is not defined (pre jQuery 1.3) add what I need
if ($.support == undefined) {
$.support = {
opacity: !($.browser.msie)
};
}
function debug(s) {
$.fn.cycle.debug && log(s);
}
function log() {
window.console && console.log && console.log('[cycle] ' + Array.prototype.join.call(arguments,' '));
}
$.expr[':'].paused = function(el) {
return el.cyclePause;
}
// the options arg can be...
// a number - indicates an immediate transition should occur to the given slide index
// a string - 'pause', 'resume', 'toggle', 'next', 'prev', 'stop', 'destroy' or the name of a transition effect (ie, 'fade', 'zoom', etc)
// an object - properties to control the slideshow
//
// the arg2 arg can be...
// the name of an fx (only used in conjunction with a numeric value for 'options')
// the value true (only used in first arg == 'resume') and indicates
// that the resume should occur immediately (not wait for next timeout)
$.fn.cycle = function(options, arg2) {
var o = { s: this.selector, c: this.context };
// in 1.3+ we can fix mistakes with the ready state
if (this.length === 0 && options != 'stop') {
if (!$.isReady && o.s) {
log('DOM not ready, queuing slideshow');
$(function() {
$(o.s,o.c).cycle(options,arg2);
});
return this;
}
// is your DOM ready? http://docs.jquery.com/Tutorials:Introducing_$(document).ready()
log('terminating; zero elements found by selector' + ($.isReady ? '' : ' (DOM not ready)'));
return this;
}
// iterate the matched nodeset
return this.each(function() {
var opts = handleArguments(this, options, arg2);
if (opts === false)
return;
opts.updateActivePagerLink = opts.updateActivePagerLink || $.fn.cycle.updateActivePagerLink;
// stop existing slideshow for this container (if there is one)
if (this.cycleTimeout)
clearTimeout(this.cycleTimeout);
this.cycleTimeout = this.cyclePause = 0;
var $cont = $(this);
var $slides = opts.slideExpr ? $(opts.slideExpr, this) : $cont.children();
var els = $slides.get();
var opts2 = buildOptions($cont, $slides, els, opts, o);
if (opts2 === false)
return;
if (els.length < 2) {
log('terminating; too few slides: ' + els.length);
return;
}
var startTime = opts2.continuous ? 10 : getTimeout(els[opts2.currSlide], els[opts2.nextSlide], opts2, !opts2.backwards);
// if it's an auto slideshow, kick it off
if (startTime) {
startTime += (opts2.delay || 0);
if (startTime < 10)
startTime = 10;
debug('first timeout: ' + startTime);
this.cycleTimeout = setTimeout(function(){go(els,opts2,0,!opts.backwards)}, startTime);
}
});
};
function triggerPause(cont, byHover, onPager) {
var opts = $(cont).data('cycle.opts');
var paused = !!cont.cyclePause;
if (paused && opts.paused)
opts.paused(cont, opts, byHover, onPager);
else if (!paused && opts.resumed)
opts.resumed(cont, opts, byHover, onPager);
}
// process the args that were passed to the plugin fn
function handleArguments(cont, options, arg2) {
if (cont.cycleStop == undefined)
cont.cycleStop = 0;
if (options === undefined || options === null)
options = {};
if (options.constructor == String) {
switch(options) {
case 'destroy':
case 'stop':
var opts = $(cont).data('cycle.opts');
if (!opts)
return false;
cont.cycleStop++; // callbacks look for change
if (cont.cycleTimeout)
clearTimeout(cont.cycleTimeout);
cont.cycleTimeout = 0;
opts.elements && $(opts.elements).stop();
$(cont).removeData('cycle.opts');
if (options == 'destroy')
destroy(opts);
return false;
case 'toggle':
cont.cyclePause = (cont.cyclePause === 1) ? 0 : 1;
checkInstantResume(cont.cyclePause, arg2, cont);
triggerPause(cont);
return false;
case 'pause':
cont.cyclePause = 1;
triggerPause(cont);
return false;
case 'resume':
cont.cyclePause = 0;
checkInstantResume(false, arg2, cont);
triggerPause(cont);
return false;
case 'prev':
case 'next':
var opts = $(cont).data('cycle.opts');
if (!opts) {
log('options not found, "prev/next" ignored');
return false;
}
$.fn.cycle[options](opts);
return false;
default:
options = { fx: options };
};
return options;
}
else if (options.constructor == Number) {
// go to the requested slide
var num = options;
options = $(cont).data('cycle.opts');
if (!options) {
log('options not found, can not advance slide');
return false;
}
if (num < 0 || num >= options.elements.length) {
log('invalid slide index: ' + num);
return false;
}
options.nextSlide = num;
if (cont.cycleTimeout) {
clearTimeout(cont.cycleTimeout);
cont.cycleTimeout = 0;
}
if (typeof arg2 == 'string')
options.oneTimeFx = arg2;
go(options.elements, options, 1, num >= options.currSlide);
return false;
}
return options;
function checkInstantResume(isPaused, arg2, cont) {
if (!isPaused && arg2 === true) { // resume now!
var options = $(cont).data('cycle.opts');
if (!options) {
log('options not found, can not resume');
return false;
}
if (cont.cycleTimeout) {
clearTimeout(cont.cycleTimeout);
cont.cycleTimeout = 0;
}
go(options.elements, options, 1, !options.backwards);
}
}
};
function removeFilter(el, opts) {
if (!$.support.opacity && opts.cleartype && el.style.filter) {
try { el.style.removeAttribute('filter'); }
catch(smother) {} // handle old opera versions
}
};
// unbind event handlers
function destroy(opts) {
if (opts.next)
$(opts.next).unbind(opts.prevNextEvent);
if (opts.prev)
$(opts.prev).unbind(opts.prevNextEvent);
if (opts.pager || opts.pagerAnchorBuilder)
$.each(opts.pagerAnchors || [], function() {
this.unbind().remove();
});
opts.pagerAnchors = null;
if (opts.destroy) // callback
opts.destroy(opts);
};
// one-time initialization
function buildOptions($cont, $slides, els, options, o) {
var startingSlideSpecified;
// support metadata plugin (v1.0 and v2.0)
var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});
var meta = $.isFunction($cont.data) ? $cont.data(opts.metaAttr) : null;
if (meta)
opts = $.extend(opts, meta);
if (opts.autostop)
opts.countdown = opts.autostopCount || els.length;
var cont = $cont[0];
$cont.data('cycle.opts', opts);
opts.$cont = $cont;
opts.stopCount = cont.cycleStop;
opts.elements = els;
opts.before = opts.before ? [opts.before] : [];
opts.after = opts.after ? [opts.after] : [];
// push some after callbacks
if (!$.support.opacity && opts.cleartype)
opts.after.push(function() { removeFilter(this, opts); });
if (opts.continuous)
opts.after.push(function() { go(els,opts,0,!opts.backwards); });
saveOriginalOpts(opts);
// clearType corrections
if (!$.support.opacity && opts.cleartype && !opts.cleartypeNoBg)
clearTypeFix($slides);
// container requires non-static position so that slides can be position within
if ($cont.css('position') == 'static')
$cont.css('position', 'relative');
if (opts.width)
$cont.width(opts.width);
if (opts.height && opts.height != 'auto')
$cont.height(opts.height);
if (opts.startingSlide != undefined) {
opts.startingSlide = parseInt(opts.startingSlide,10);
if (opts.startingSlide >= els.length || opts.startSlide < 0)
opts.startingSlide = 0; // catch bogus input
else
startingSlideSpecified = true;
}
else if (opts.backwards)
opts.startingSlide = els.length - 1;
else
opts.startingSlide = 0;
// if random, mix up the slide array
if (opts.random) {
opts.randomMap = [];
for (var i = 0; i < els.length; i++)
opts.randomMap.push(i);
opts.randomMap.sort(function(a,b) {return Math.random() - 0.5;});
if (startingSlideSpecified) {
// try to find the specified starting slide and if found set start slide index in the map accordingly
for ( var cnt = 0; cnt < els.length; cnt++ ) {
if ( opts.startingSlide == opts.randomMap[cnt] ) {
opts.randomIndex = cnt;
}
}
}
else {
opts.randomIndex = 1;
opts.startingSlide = opts.randomMap[1];
}
}
else if (opts.startingSlide >= els.length)
opts.startingSlide = 0; // catch bogus input
opts.currSlide = opts.startingSlide || 0;
var first = opts.startingSlide;
// set position and zIndex on all the slides
$slides.css({position: 'absolute', top:0, left:0}).hide().each(function(i) {
var z;
if (opts.backwards)
z = first ? i <= first ? els.length + (i-first) : first-i : els.length-i;
else
z = first ? i >= first ? els.length - (i-first) : first-i : els.length-i;
$(this).css('z-index', z)
});
// make sure first slide is visible
$(els[first]).css('opacity',1).show(); // opacity bit needed to handle restart use case
removeFilter(els[first], opts);
// stretch slides
if (opts.fit) {
if (!opts.aspect) {
if (opts.width)
$slides.width(opts.width);
if (opts.height && opts.height != 'auto')
$slides.height(opts.height);
} else {
$slides.each(function(){
var $slide = $(this);
var ratio = (opts.aspect === true) ? $slide.width()/$slide.height() : opts.aspect;
if( opts.width && $slide.width() != opts.width ) {
$slide.width( opts.width );
$slide.height( opts.width / ratio );
}
if( opts.height && $slide.height() < opts.height ) {
$slide.height( opts.height );
$slide.width( opts.height * ratio );
}
});
}
}
if (opts.center && ((!opts.fit) || opts.aspect)) {
$slides.each(function(){
var $slide = $(this);
$slide.css({
"margin-left": opts.width ?
((opts.width - $slide.width()) / 2) + "px" :
0,
"margin-top": opts.height ?
((opts.height - $slide.height()) / 2) + "px" :
0
});
});
}
if (opts.center && !opts.fit && !opts.slideResize) {
$slides.each(function(){
var $slide = $(this);
$slide.css({
"margin-left": opts.width ? ((opts.width - $slide.width()) / 2) + "px" : 0,
"margin-top": opts.height ? ((opts.height - $slide.height()) / 2) + "px" : 0
});
});
}
// stretch container
var reshape = opts.containerResize && !$cont.innerHeight();
if (reshape) { // do this only if container has no size http://tinyurl.com/da2oa9
var maxw = 0, maxh = 0;
for(var j=0; j < els.length; j++) {
var $e = $(els[j]), e = $e[0], w = $e.outerWidth(), h = $e.outerHeight();
if (!w) w = e.offsetWidth || e.width || $e.attr('width');
if (!h) h = e.offsetHeight || e.height || $e.attr('height');
maxw = w > maxw ? w : maxw;
maxh = h > maxh ? h : maxh;
}
if (maxw > 0 && maxh > 0)
$cont.css({width:maxw+'px',height:maxh+'px'});
}
var pauseFlag = false; // https://github.com/malsup/cycle/issues/44
if (opts.pause)
$cont.hover(
function(){
pauseFlag = true;
this.cyclePause++;
triggerPause(cont, true);
},
function(){
pauseFlag && this.cyclePause--;
triggerPause(cont, true);
}
);
if (supportMultiTransitions(opts) === false)
return false;
// apparently a lot of people use image slideshows without height/width attributes on the images.
// Cycle 2.50+ requires the sizing info for every slide; this block tries to deal with that.
var requeue = false;
options.requeueAttempts = options.requeueAttempts || 0;
$slides.each(function() {
// try to get height/width of each slide
var $el = $(this);
this.cycleH = (opts.fit && opts.height) ? opts.height : ($el.height() || this.offsetHeight || this.height || $el.attr('height') || 0);
this.cycleW = (opts.fit && opts.width) ? opts.width : ($el.width() || this.offsetWidth || this.width || $el.attr('width') || 0);
if ( $el.is('img') ) {
// sigh.. sniffing, hacking, shrugging... this crappy hack tries to account for what browsers do when
// an image is being downloaded and the markup did not include sizing info (height/width attributes);
// there seems to be some "default" sizes used in this situation
var loadingIE = ($.browser.msie && this.cycleW == 28 && this.cycleH == 30 && !this.complete);
var loadingFF = ($.browser.mozilla && this.cycleW == 34 && this.cycleH == 19 && !this.complete);
var loadingOp = ($.browser.opera && ((this.cycleW == 42 && this.cycleH == 19) || (this.cycleW == 37 && this.cycleH == 17)) && !this.complete);
var loadingOther = (this.cycleH == 0 && this.cycleW == 0 && !this.complete);
// don't requeue for images that are still loading but have a valid size
if (loadingIE || loadingFF || loadingOp || loadingOther) {
if (o.s && opts.requeueOnImageNotLoaded && ++options.requeueAttempts < 100) { // track retry count so we don't loop forever
log(options.requeueAttempts,' - img slide not loaded, requeuing slideshow: ', this.src, this.cycleW, this.cycleH);
setTimeout(function() {$(o.s,o.c).cycle(options)}, opts.requeueTimeout);
requeue = true;
return false; // break each loop
}
else {
log('could not determine size of image: '+this.src, this.cycleW, this.cycleH);
}
}
}
return true;
});
if (requeue)
return false;
opts.cssBefore = opts.cssBefore || {};
opts.cssAfter = opts.cssAfter || {};
opts.cssFirst = opts.cssFirst || {};
opts.animIn = opts.animIn || {};
opts.animOut = opts.animOut || {};
$slides.not(':eq('+first+')').css(opts.cssBefore);
$($slides[first]).css(opts.cssFirst);
if (opts.timeout) {
opts.timeout = parseInt(opts.timeout,10);
// ensure that timeout and speed settings are sane
if (opts.speed.constructor == String)
opts.speed = $.fx.speeds[opts.speed] || parseInt(opts.speed,10);
if (!opts.sync)
opts.speed = opts.speed / 2;
var buffer = opts.fx == 'none' ? 0 : opts.fx == 'shuffle' ? 500 : 250;
while((opts.timeout - opts.speed) < buffer) // sanitize timeout
opts.timeout += opts.speed;
}
if (opts.easing)
opts.easeIn = opts.easeOut = opts.easing;
if (!opts.speedIn)
opts.speedIn = opts.speed;
if (!opts.speedOut)
opts.speedOut = opts.speed;
opts.slideCount = els.length;
opts.currSlide = opts.lastSlide = first;
if (opts.random) {
if (++opts.randomIndex == els.length)
opts.randomIndex = 0;
opts.nextSlide = opts.randomMap[opts.randomIndex];
}
else if (opts.backwards)
opts.nextSlide = opts.startingSlide == 0 ? (els.length-1) : opts.startingSlide-1;
else
opts.nextSlide = opts.startingSlide >= (els.length-1) ? 0 : opts.startingSlide+1;
// run transition init fn
if (!opts.multiFx) {
var init = $.fn.cycle.transitions[opts.fx];
if ($.isFunction(init))
init($cont, $slides, opts);
else if (opts.fx != 'custom' && !opts.multiFx) {
log('unknown transition: ' + opts.fx,'; slideshow terminating');
return false;
}
}
// fire artificial events
var e0 = $slides[first];
if (!opts.skipInitializationCallbacks) {
if (opts.before.length)
opts.before[0].apply(e0, [e0, e0, opts, true]);
if (opts.after.length)
opts.after[0].apply(e0, [e0, e0, opts, true]);
}
if (opts.next)
$(opts.next).bind(opts.prevNextEvent,function(){return advance(opts,1)});
if (opts.prev)
$(opts.prev).bind(opts.prevNextEvent,function(){return advance(opts,0)});
if (opts.pager || opts.pagerAnchorBuilder)
buildPager(els,opts);
exposeAddSlide(opts, els);
return opts;
};
// save off original opts so we can restore after clearing state
function saveOriginalOpts(opts) {
opts.original = { before: [], after: [] };
opts.original.cssBefore = $.extend({}, opts.cssBefore);
opts.original.cssAfter = $.extend({}, opts.cssAfter);
opts.original.animIn = $.extend({}, opts.animIn);
opts.original.animOut = $.extend({}, opts.animOut);
$.each(opts.before, function() { opts.original.before.push(this); });
$.each(opts.after, function() { opts.original.after.push(this); });
};
function supportMultiTransitions(opts) {
var i, tx, txs = $.fn.cycle.transitions;
// look for multiple effects
if (opts.fx.indexOf(',') > 0) {
opts.multiFx = true;
opts.fxs = opts.fx.replace(/\s*/g,'').split(',');
// discard any bogus effect names
for (i=0; i < opts.fxs.length; i++) {
var fx = opts.fxs[i];
tx = txs[fx];
if (!tx || !txs.hasOwnProperty(fx) || !$.isFunction(tx)) {
log('discarding unknown transition: ',fx);
opts.fxs.splice(i,1);
i--;
}
}
// if we have an empty list then we threw everything away!
if (!opts.fxs.length) {
log('No valid transitions named; slideshow terminating.');
return false;
}
}
else if (opts.fx == 'all') { // auto-gen the list of transitions
opts.multiFx = true;
opts.fxs = [];
for (p in txs) {
tx = txs[p];
if (txs.hasOwnProperty(p) && $.isFunction(tx))
opts.fxs.push(p);
}
}
if (opts.multiFx && opts.randomizeEffects) {
// munge the fxs array to make effect selection random
var r1 = Math.floor(Math.random() * 20) + 30;
for (i = 0; i < r1; i++) {
var r2 = Math.floor(Math.random() * opts.fxs.length);
opts.fxs.push(opts.fxs.splice(r2,1)[0]);
}
debug('randomized fx sequence: ',opts.fxs);
}
return true;
};
// provide a mechanism for adding slides after the slideshow has started
function exposeAddSlide(opts, els) {
opts.addSlide = function(newSlide, prepend) {
var $s = $(newSlide), s = $s[0];
if (!opts.autostopCount)
opts.countdown++;
els[prepend?'unshift':'push'](s);
if (opts.els)
opts.els[prepend?'unshift':'push'](s); // shuffle needs this
opts.slideCount = els.length;
// add the slide to the random map and resort
if (opts.random) {
opts.randomMap.push(opts.slideCount-1);
opts.randomMap.sort(function(a,b) {return Math.random() - 0.5;});
}
$s.css('position','absolute');
$s[prepend?'prependTo':'appendTo'](opts.$cont);
if (prepend) {
opts.currSlide++;
opts.nextSlide++;
}
if (!$.support.opacity && opts.cleartype && !opts.cleartypeNoBg)
clearTypeFix($s);
if (opts.fit && opts.width)
$s.width(opts.width);
if (opts.fit && opts.height && opts.height != 'auto')
$s.height(opts.height);
s.cycleH = (opts.fit && opts.height) ? opts.height : $s.height();
s.cycleW = (opts.fit && opts.width) ? opts.width : $s.width();
$s.css(opts.cssBefore);
if (opts.pager || opts.pagerAnchorBuilder)
$.fn.cycle.createPagerAnchor(els.length-1, s, $(opts.pager), els, opts);
if ($.isFunction(opts.onAddSlide))
opts.onAddSlide($s);
else
$s.hide(); // default behavior
};
}
// reset internal state; we do this on every pass in order to support multiple effects
$.fn.cycle.resetState = function(opts, fx) {
fx = fx || opts.fx;
opts.before = []; opts.after = [];
opts.cssBefore = $.extend({}, opts.original.cssBefore);
opts.cssAfter = $.extend({}, opts.original.cssAfter);
opts.animIn = $.extend({}, opts.original.animIn);
opts.animOut = $.extend({}, opts.original.animOut);
opts.fxFn = null;
$.each(opts.original.before, function() { opts.before.push(this); });
$.each(opts.original.after, function() { opts.after.push(this); });
// re-init
var init = $.fn.cycle.transitions[fx];
if ($.isFunction(init))
init(opts.$cont, $(opts.elements), opts);
};
// this is the main engine fn, it handles the timeouts, callbacks and slide index mgmt
function go(els, opts, manual, fwd) {
// opts.busy is true if we're in the middle of an animation
if (manual && opts.busy && opts.manualTrump) {
// let manual transitions requests trump active ones
debug('manualTrump in go(), stopping active transition');
$(els).stop(true,true);
opts.busy = 0;
}
// don't begin another timeout-based transition if there is one active
if (opts.busy) {
debug('transition active, ignoring new tx request');
return;
}
var p = opts.$cont[0], curr = els[opts.currSlide], next = els[opts.nextSlide];
// stop cycling if we have an outstanding stop request
if (p.cycleStop != opts.stopCount || p.cycleTimeout === 0 && !manual)
return;
// check to see if we should stop cycling based on autostop options
if (!manual && !p.cyclePause && !opts.bounce &&
((opts.autostop && (--opts.countdown <= 0)) ||
(opts.nowrap && !opts.random && opts.nextSlide < opts.currSlide))) {
if (opts.end)
opts.end(opts);
return;
}
// if slideshow is paused, only transition on a manual trigger
var changed = false;
if ((manual || !p.cyclePause) && (opts.nextSlide != opts.currSlide)) {
changed = true;
var fx = opts.fx;
// keep trying to get the slide size if we don't have it yet
curr.cycleH = curr.cycleH || $(curr).height();
curr.cycleW = curr.cycleW || $(curr).width();
next.cycleH = next.cycleH || $(next).height();
next.cycleW = next.cycleW || $(next).width();
// support multiple transition types
if (opts.multiFx) {
if (fwd && (opts.lastFx == undefined || ++opts.lastFx >= opts.fxs.length))
opts.lastFx = 0;
else if (!fwd && (opts.lastFx == undefined || --opts.lastFx < 0))
opts.lastFx = opts.fxs.length - 1;
fx = opts.fxs[opts.lastFx];
}
// one-time fx overrides apply to: $('div').cycle(3,'zoom');
if (opts.oneTimeFx) {
fx = opts.oneTimeFx;
opts.oneTimeFx = null;
}
$.fn.cycle.resetState(opts, fx);
// run the before callbacks
if (opts.before.length)
$.each(opts.before, function(i,o) {
if (p.cycleStop != opts.stopCount) return;
o.apply(next, [curr, next, opts, fwd]);
});
// stage the after callacks
var after = function() {
opts.busy = 0;
$.each(opts.after, function(i,o) {
if (p.cycleStop != opts.stopCount) return;
o.apply(next, [curr, next, opts, fwd]);
});
if (!p.cycleStop) {
// queue next transition
queueNext();
}
};
debug('tx firing('+fx+'); currSlide: ' + opts.currSlide + '; nextSlide: ' + opts.nextSlide);
// get ready to perform the transition
opts.busy = 1;
if (opts.fxFn) // fx function provided?
opts.fxFn(curr, next, opts, after, fwd, manual && opts.fastOnEvent);
else if ($.isFunction($.fn.cycle[opts.fx])) // fx plugin ?
$.fn.cycle[opts.fx](curr, next, opts, after, fwd, manual && opts.fastOnEvent);
else
$.fn.cycle.custom(curr, next, opts, after, fwd, manual && opts.fastOnEvent);
}
else {
queueNext();
}
if (changed || opts.nextSlide == opts.currSlide) {
// calculate the next slide
opts.lastSlide = opts.currSlide;
if (opts.random) {
opts.currSlide = opts.nextSlide;
if (++opts.randomIndex == els.length) {
opts.randomIndex = 0;
opts.randomMap.sort(function(a,b) {return Math.random() - 0.5;});
}
opts.nextSlide = opts.randomMap[opts.randomIndex];
if (opts.nextSlide == opts.currSlide)
opts.nextSlide = (opts.currSlide == opts.slideCount - 1) ? 0 : opts.currSlide + 1;
}
else if (opts.backwards) {
var roll = (opts.nextSlide - 1) < 0;
if (roll && opts.bounce) {
opts.backwards = !opts.backwards;
opts.nextSlide = 1;
opts.currSlide = 0;
}
else {
opts.nextSlide = roll ? (els.length-1) : opts.nextSlide-1;
opts.currSlide = roll ? 0 : opts.nextSlide+1;
}
}
else { // sequence
var roll = (opts.nextSlide + 1) == els.length;
if (roll && opts.bounce) {
opts.backwards = !opts.backwards;
opts.nextSlide = els.length-2;
opts.currSlide = els.length-1;
}
else {
opts.nextSlide = roll ? 0 : opts.nextSlide+1;
opts.currSlide = roll ? els.length-1 : opts.nextSlide-1;
}
}
}
if (changed && opts.pager)
opts.updateActivePagerLink(opts.pager, opts.currSlide, opts.activePagerClass);
function queueNext() {
// stage the next transition
var ms = 0, timeout = opts.timeout;
if (opts.timeout && !opts.continuous) {
ms = getTimeout(els[opts.currSlide], els[opts.nextSlide], opts, fwd);
if (opts.fx == 'shuffle')
ms -= opts.speedOut;
}
else if (opts.continuous && p.cyclePause) // continuous shows work off an after callback, not this timer logic
ms = 10;
if (ms > 0)
p.cycleTimeout = setTimeout(function(){ go(els, opts, 0, !opts.backwards) }, ms);
}
};
// invoked after transition
$.fn.cycle.updateActivePagerLink = function(pager, currSlide, clsName) {
$(pager).each(function() {
$(this).children().removeClass(clsName).eq(currSlide).addClass(clsName);
});
};
// calculate timeout value for current transition
function getTimeout(curr, next, opts, fwd) {
if (opts.timeoutFn) {
// call user provided calc fn
var t = opts.timeoutFn.call(curr,curr,next,opts,fwd);
while (opts.fx != 'none' && (t - opts.speed) < 250) // sanitize timeout
t += opts.speed;
debug('calculated timeout: ' + t + '; speed: ' + opts.speed);
if (t !== false)
return t;
}
return opts.timeout;
};
// expose next/prev function, caller must pass in state
$.fn.cycle.next = function(opts) { advance(opts,1); };
$.fn.cycle.prev = function(opts) { advance(opts,0);};
// advance slide forward or back
function advance(opts, moveForward) {
var val = moveForward ? 1 : -1;
var els = opts.elements;
var p = opts.$cont[0], timeout = p.cycleTimeout;
if (timeout) {
clearTimeout(timeout);
p.cycleTimeout = 0;
}
if (opts.random && val < 0) {
// move back to the previously display slide
opts.randomIndex--;
if (--opts.randomIndex == -2)
opts.randomIndex = els.length-2;
else if (opts.randomIndex == -1)
opts.randomIndex = els.length-1;
opts.nextSlide = opts.randomMap[opts.randomIndex];
}
else if (opts.random) {
opts.nextSlide = opts.randomMap[opts.randomIndex];
}
else {
opts.nextSlide = opts.currSlide + val;
if (opts.nextSlide < 0) {
if (opts.nowrap) return false;
opts.nextSlide = els.length - 1;
}
else if (opts.nextSlide >= els.length) {
if (opts.nowrap) return false;
opts.nextSlide = 0;
}
}
var cb = opts.onPrevNextEvent || opts.prevNextClick; // prevNextClick is deprecated
if ($.isFunction(cb))
cb(val > 0, opts.nextSlide, els[opts.nextSlide]);
go(els, opts, 1, moveForward);
return false;
};
function buildPager(els, opts) {
var $p = $(opts.pager);
$.each(els, function(i,o) {
$.fn.cycle.createPagerAnchor(i,o,$p,els,opts);
});
opts.updateActivePagerLink(opts.pager, opts.startingSlide, opts.activePagerClass);
};
$.fn.cycle.createPagerAnchor = function(i, el, $p, els, opts) {
var a;
if ($.isFunction(opts.pagerAnchorBuilder)) {
a = opts.pagerAnchorBuilder(i,el);
debug('pagerAnchorBuilder('+i+', el) returned: ' + a);
}
else
a = '<a href="#">'+(i+1)+'</a>';
if (!a)
return;
var $a = $(a);
// don't reparent if anchor is in the dom
if ($a.parents('body').length === 0) {
var arr = [];
if ($p.length > 1) {
$p.each(function() {
var $clone = $a.clone(true);
$(this).append($clone);
arr.push($clone[0]);
});
$a = $(arr);
}
else {
$a.appendTo($p);
}
}
opts.pagerAnchors = opts.pagerAnchors || [];
opts.pagerAnchors.push($a);
var pagerFn = function(e) {
e.preventDefault();
opts.nextSlide = i;
var p = opts.$cont[0], timeout = p.cycleTimeout;
if (timeout) {
clearTimeout(timeout);
p.cycleTimeout = 0;
}
var cb = opts.onPagerEvent || opts.pagerClick; // pagerClick is deprecated
if ($.isFunction(cb))
cb(opts.nextSlide, els[opts.nextSlide]);
go(els,opts,1,opts.currSlide < i); // trigger the trans
// return false; // <== allow bubble
}
if ( /mouseenter|mouseover/i.test(opts.pagerEvent) ) {
$a.hover(pagerFn, function(){/* no-op */} );
}
else {
$a.bind(opts.pagerEvent, pagerFn);
}
if ( ! /^click/.test(opts.pagerEvent) && !opts.allowPagerClickBubble)
$a.bind('click.cycle', function(){return false;}); // suppress click
var cont = opts.$cont[0];
var pauseFlag = false; // https://github.com/malsup/cycle/issues/44
if (opts.pauseOnPagerHover) {
$a.hover(
function() {
pauseFlag = true;
cont.cyclePause++;
triggerPause(cont,true,true);
}, function() {
pauseFlag && cont.cyclePause--;
triggerPause(cont,true,true);
}
);
}
};
// helper fn to calculate the number of slides between the current and the next
$.fn.cycle.hopsFromLast = function(opts, fwd) {
var hops, l = opts.lastSlide, c = opts.currSlide;
if (fwd)
hops = c > l ? c - l : opts.slideCount - l;
else
hops = c < l ? l - c : l + opts.slideCount - c;
return hops;
};
// fix clearType problems in ie6 by setting an explicit bg color
// (otherwise text slides look horrible during a fade transition)
function clearTypeFix($slides) {
debug('applying clearType background-color hack');
function hex(s) {
s = parseInt(s,10).toString(16);
return s.length < 2 ? '0'+s : s;
};
function getBg(e) {
for ( ; e && e.nodeName.toLowerCase() != 'html'; e = e.parentNode) {
var v = $.css(e,'background-color');
if (v && v.indexOf('rgb') >= 0 ) {
var rgb = v.match(/\d+/g);
return '#'+ hex(rgb[0]) + hex(rgb[1]) + hex(rgb[2]);
}
if (v && v != 'transparent')
return v;
}
return '#ffffff';
};
$slides.each(function() { $(this).css('background-color', getBg(this)); });
};
// reset common props before the next transition
$.fn.cycle.commonReset = function(curr,next,opts,w,h,rev) {
$(opts.elements).not(curr).hide();
if (typeof opts.cssBefore.opacity == 'undefined')
opts.cssBefore.opacity = 1;
opts.cssBefore.display = 'block';
if (opts.slideResize && w !== false && next.cycleW > 0)
opts.cssBefore.width = next.cycleW;
if (opts.slideResize && h !== false && next.cycleH > 0)
opts.cssBefore.height = next.cycleH;
opts.cssAfter = opts.cssAfter || {};
opts.cssAfter.display = 'none';
$(curr).css('zIndex',opts.slideCount + (rev === true ? 1 : 0));
$(next).css('zIndex',opts.slideCount + (rev === true ? 0 : 1));
};
// the actual fn for effecting a transition
$.fn.cycle.custom = function(curr, next, opts, cb, fwd, speedOverride) {
var $l = $(curr), $n = $(next);
var speedIn = opts.speedIn, speedOut = opts.speedOut, easeIn = opts.easeIn, easeOut = opts.easeOut;
$n.css(opts.cssBefore);
if (speedOverride) {
if (typeof speedOverride == 'number')
speedIn = speedOut = speedOverride;
else
speedIn = speedOut = 1;
easeIn = easeOut = null;
}
var fn = function() {
$n.animate(opts.animIn, speedIn, easeIn, function() {
cb();
});
};
$l.animate(opts.animOut, speedOut, easeOut, function() {
$l.css(opts.cssAfter);
if (!opts.sync)
fn();
});
if (opts.sync) fn();
};
// transition definitions - only fade is defined here, transition pack defines the rest
$.fn.cycle.transitions = {
fade: function($cont, $slides, opts) {
$slides.not(':eq('+opts.currSlide+')').css('opacity',0);
opts.before.push(function(curr,next,opts) {
$.fn.cycle.commonReset(curr,next,opts);
opts.cssBefore.opacity = 0;
});
opts.animIn = { opacity: 1 };
opts.animOut = { opacity: 0 };
opts.cssBefore = { top: 0, left: 0 };
}
};
$.fn.cycle.ver = function() { return ver; };
// override these globally if you like (they are all optional)