/*
* Slides, A Slideshow Plugin for jQuery
* Intructions: http://slidesjs.com
* By: Nathan Searles, http://nathansearles.com
* Version: 1.1.5
* Updated: March 7th, 2011
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function($){
$.fn.slides = function( option ) {
// override defaults with specified option
option = $.extend( {}, $.fn.slides.option, option );

// Setup to use RTL if the selector has the `rtl` class.
var isRTL = false;
if ( $( 'body' ).hasClass( 'rtl' ) ) isRTL = true;

return this.each(function(){
// wrap slides in control container, make sure slides are block level
$(option.container, $(this)).children().wrapAll('<div class="slides_control"/>');

var elem = $(this),
control = $('.slides_control',elem),
total = control.children().size(),
width = control.children().outerWidth(),
height = control.children().outerHeight(),
start = option.start - 1,
effect = option.effect.indexOf(',') < 0 ? option.effect : option.effect.replace(' ', '').split(',')[0],
paginationEffect = option.effect.indexOf(',') < 0 ? effect : option.effect.replace(' ', '').split(',')[1],
next = 0, prev = 0, number = 0, current = 0, loaded, active, clicked, position, direction, imageParent, pauseTimeout, playInterval;

// animate slides
function animate(direction, effect, clicked) {
if (!active && loaded) {
active = true;
// start of animation
option.animationStart(current + 1);
switch(direction) {
case 'next':
// change current slide to previous
prev = current;
// get next from current + 1
next = current + 1;
// if last slide, set next to first slide
next = total === next ? 0 : next;
// set position of next slide to right of previous
position = width*2;
// distance to slide based on width of slides
direction = -width*2;
// store new current slide
current = next;
break;
case 'prev':
// change current slide to previous
prev = current;
// get next from current - 1
next = current - 1;
// if first slide, set next to last slide
next = next === -1 ? total-1 : next;
// set position of next slide to left of previous
position = 0;
// distance to slide based on width of slides
direction = 0;
// store new current slide
current = next;
break;
case 'pagination':
// get next from pagination item clicked, convert to number
next = parseInt(clicked,10);
// get previous from pagination item with class of current
prev = $('.' + option.paginationClass + ' li.current a', elem).attr('href').match('[^#/]+$');
// if next is greater then previous set position of next slide to right of previous
if (next > prev) {
position = width*2;
direction = -width*2;
} else {
// if next is less then previous set position of next slide to left of previous
position = 0;
direction = 0;
}
// store new current slide
current = next;
break;
}

// fade animation
if (effect === 'fade') {
// fade animation with crossfade
if (option.crossfade) {
// put hidden next above current
control.children(':eq('+ next +')', elem).css({
zIndex: 10
// fade in next
}).fadeIn(option.fadeSpeed, option.fadeEasing, function(){
if (option.autoHeight) {
// animate container to height of next
control.animate({
height: control.children(':eq('+ next +')', elem).outerHeight()
}, option.autoHeightSpeed, function(){
// hide previous
control.children(':eq('+ prev +')', elem).css({
display: 'none',
zIndex: 0
});
// reset z index
control.children(':eq('+ next +')', elem).css({
zIndex: 0
});
// end of animation
option.animationComplete(next + 1);
active = false;
});
} else {
// hide previous
control.children(':eq('+ prev +')', elem).css({
display: 'none',
zIndex: 0
});
// reset zindex
control.children(':eq('+ next +')', elem).css({
zIndex: 0
});
// end of animation
option.animationComplete(next + 1);
active = false;
}
});
} else {
// fade animation with no crossfade
control.children(':eq('+ prev +')', elem).fadeOut(option.fadeSpeed, option.fadeEasing, function(){
// animate to new height
if (option.autoHeight) {
control.animate({
// animate container to height of next
height: control.children(':eq('+ next +')', elem).outerHeight()
}, option.autoHeightSpeed,
// fade in next slide
function(){
control.children(':eq('+ next +')', elem).fadeIn(option.fadeSpeed, option.fadeEasing);
});
} else {
// if fixed height
control.children(':eq('+ next +')', elem).fadeIn(option.fadeSpeed, option.fadeEasing, function(){
// fix font rendering in ie, lame
if($.browser.msie) {
$(this).get(0).style.removeAttribute('filter');
}
});
}
// end of animation
option.animationComplete(next + 1);
active = false;
});
}
// slide animation
} else {
// move next slide to right of previous

// RTL Support
var args = {
left: position,
display: 'block'
};

if ( isRTL ) {

var args = {
right: position,
display: 'block'
};

}

var funcArg1 = {
left: -width
};
var funcArg2 = {
left: width,
zIndex: 5
};
var funcArg3 = {
left: width,
display: 'none',
zIndex: 0
};

if ( isRTL ) {

var funcArg1 = {
right: -width
};
var funcArg2 = {
right: width,
zIndex: 5
};
var funcArg3 = {
right: width,
display: 'none',
zIndex: 0
};

}

control.children(':eq('+ next +')').css( args );
// animate to new height

// RTL Support

var animateOptions = {
left: direction,
height: control.children(':eq('+ next +')').outerHeight()
};

if ( isRTL ) {

var animateOptions = {
right: direction,
height: control.children(':eq('+ next +')').outerHeight()
};

}

if (option.autoHeight) {
control.animate( animateOptions ,option.slideSpeed, option.slideEasing, function(){
control.css( funcArg1 );
control.children(':eq('+ next +')').css( funcArg2 );
// reset previous slide
control.children(':eq('+ prev +')').css( funcArg3 );
// end of animation
option.animationComplete(next + 1);
active = false;
});
// if fixed height
} else {

// RTL Support

var animateOptions = {
left: direction
};

if ( isRTL ) {

var animateOptions = {
right: direction
};

}

// animate control
control.animate( animateOptions,option.slideSpeed, option.slideEasing, function(){
// after animation reset control position
control.css( funcArg1 );
// reset and show next
control.children(':eq('+ next +')').css( funcArg2 );
// reset previous slide
control.children(':eq('+ prev +')').css( funcArg3 );
// end of animation
option.animationComplete(next + 1);
active = false;
});
}
}
// set current state for pagination
if (option.pagination) {
// remove current class from all
$('.'+ option.paginationClass +' li.current', elem).removeClass('current');
// add current class to next
$('.' + option.paginationClass + ' li:eq('+ next +')', elem).addClass('current');
}
}
} // end animate function

function stop() {
// clear interval from stored id
clearInterval(elem.data('interval'));
}

function pause() {
if (option.pause) {
// clear timeout and interval
clearTimeout(elem.data('pause'));
clearInterval(elem.data('interval'));
// pause slide show for option.pause amount
pauseTimeout = setTimeout(function() {
// clear pause timeout
clearTimeout(elem.data('pause'));
// start play interval after pause
playInterval = setInterval( function(){
animate("next", effect);
},option.play);
// store play interval
elem.data('interval',playInterval);
},option.pause);
// store pause interval
elem.data('pause',pauseTimeout);
} else {
// if no pause, just stop
stop();
}
}

// 2 or more slides required
if (total < 2) {
return;
}

// error corection for start slide
if (start < 0) {
start = 0;
}

if (start > total) {
start = total - 1;
}

// change current based on start option number
if (option.start) {
current = start;
}

// randomizes slide order
if (option.randomize) {
control.randomize();
}

// make sure overflow is hidden, width is set
$(option.container, elem).css({
overflow: 'hidden',
// fix for ie
position: 'relative'
});

// set css for slides

// RTL Support
var args = {
position: 'absolute',
top: 0,
left: control.children().outerWidth(),
zIndex: 0,
display: 'none'
};

var args2 = {
position: 'relative',
// size of control 3 x slide width
width: (width * 3),
// set height to slide height
height: height,
// center control to slide
left: -width
};

if ( isRTL ) {

var args = {
position: 'absolute',
top: 0,
right: control.children().outerWidth(),
zIndex: 0,
display: 'none'
};

var args2 = {
position: 'relative',
// size of control 3 x slide width
width: (width * 3),
// set height to slide height
height: height,
// center control to slide
right: -width
};

}

control.children().css( args );

// set css for control div
control.css( args2 );

// show slides
$(option.container, elem).css({
display: 'block'
});

// if autoHeight true, get and set height of first slide
if (option.autoHeight) {
control.children().css({
height: 'auto'
});
control.animate({
height: control.children(':eq('+ start +')').outerHeight()
},option.autoHeightSpeed);
}

// checks if image is loaded
if (option.preload && control.find('img').length) {
// adds preload image
$(option.container, elem).css({
background: 'url(' + option.preloadImage + ') no-repeat 50% 50%'
});

// gets image src, with cache buster
var img = control.find('img:eq(' + start + ')').attr('src')/* + '?' + (new Date()).getTime()*/;

// check if the image has a parent
if ($('img', elem).parent().attr('class') != 'slides_control') {
// If image has parent, get tag name
imageParent = control.children(':eq(0)')[0].tagName.toLowerCase();
} else {
// Image doesn't have parent, use image tag name
imageParent = control.find('img:eq(' + start + ')');
}

// checks if image is loaded
control.find('img:eq(' + start + ')').attr('src', img).load(function() {
// once image is fully loaded, fade in
control.find(imageParent + ':eq(' + start + ')').fadeIn(option.fadeSpeed, option.fadeEasing, function(){
$(this).css({
zIndex: 5
});
// removes preload image
$(option.container, elem).css({
background: ''
});
// let the script know everything is loaded
loaded = true;
// call the loaded funciton
option.slidesLoaded();
});
});
} else {
// if no preloader fade in start slide
control.children(':eq(' + start + ')').fadeIn(option.fadeSpeed, option.fadeEasing, function(){
// let the script know everything is loaded
loaded = true;
// call the loaded funciton
option.slidesLoaded();
});
}

// click slide for next
if (option.bigTarget) {
// set cursor to pointer
control.children().css({
cursor: 'pointer'
});
// click handler
control.children().click(function(){
// animate to next on slide click
animate('next', effect);
return false;
});
}

// pause on mouseover
if (option.hoverPause && option.play) {
control.bind('mouseover',function(){
// on mouse over stop
stop();
});
control.bind('mouseleave',function(){
// on mouse leave start pause timeout
pause();
});
}

// generate next/prev buttons
if (option.generateNextPrev) {
$(option.container, elem).after('<a href="#" class="'+ option.prev +'">Prev</a>');
$('.' + option.prev, elem).after('<a href="#" class="'+ option.next +'">Next</a>');
}

// next button
$('.' + option.next ,elem).click(function(e){
e.preventDefault();
if (option.play) {
pause();
}
animate('next', effect);
});

// previous button
$('.' + option.prev, elem).click(function(e){
e.preventDefault();
if (option.play) {
pause();
}
animate('prev', effect);
});

// generate pagination
if (option.generatePagination) {
// create unordered list
elem.append('<ul class='+ option.paginationClass +'></ul>');
// for each slide create a list item and link
control.children().each(function(){
$('.' + option.paginationClass, elem).append('<li><a href="#'+ number +'">'+ (number+1) +'</a></li>');
number++;
});
} else {
// if pagination exists, add href w/ value of item number to links
$('.' + option.paginationClass + ' li a', elem).each(function(){
$(this).attr('href', '#' + number);
number++;
});
}

// add current class to start slide pagination
$('.' + option.paginationClass + ' li:eq('+ start +')', elem).addClass('current');

// click handling
$('.' + option.paginationClass + ' li a', elem ).click(function(){
// pause slideshow
if (option.play) {
pause();
}
// get clicked, pass to animate function
clicked = $(this).attr('href').match('[^#/]+$');
// if current slide equals clicked, don't do anything
if (current != clicked) {
animate('pagination', paginationEffect, clicked);
}
return false;
});

// click handling
$('a.link', elem).click(function(){
// pause slideshow
if (option.play) {
pause();
}
// get clicked, pass to animate function
clicked = $(this).attr('href').match('[^#/]+$') - 1;
// if current slide equals clicked, don't do anything
if (current != clicked) {
animate('pagination', paginationEffect, clicked);
}
return false;
});

if (option.play) {
// set interval
playInterval = setInterval(function() {
animate('next', effect);
}, option.play);
// store interval id
elem.data('interval',playInterval);
}
});
};

// default options
$.fn.slides.option = {
preload: false, // boolean, Set true to preload images in an image based slideshow
preloadImage: '/img/loading.gif', // string, Name and location of loading image for preloader. Default is "/img/loading.gif"
container: 'slides_container', // string, Class name for slides container. Default is "slides_container"
generateNextPrev: false, // boolean, Auto generate next/prev buttons
next: 'next', // string, Class name for next button
prev: 'prev', // string, Class name for previous button
pagination: true, // boolean, If you're not using pagination you can set to false, but don't have to
generatePagination: true, // boolean, Auto generate pagination
paginationClass: 'pagination', // string, Class name for pagination
fadeSpeed: 350, // number, Set the speed of the fading animation in milliseconds
fadeEasing: '', // string, must load jQuery's easing plugin before http://gsgd.co.uk/sandbox/jquery/easing/
slideSpeed: 350, // number, Set the speed of the sliding animation in milliseconds
slideEasing: '', // string, must load jQuery's easing plugin before http://gsgd.co.uk/sandbox/jquery/easing/
start: 1, // number, Set the speed of the sliding animation in milliseconds
effect: 'slide', // string, '[next/prev], [pagination]', e.g. 'slide, fade' or simply 'fade' for both
crossfade: false, // boolean, Crossfade images in a image based slideshow
randomize: false, // boolean, Set to true to randomize slides
play: 0, // number, Autoplay slideshow, a positive number will set to true and be the time between slide animation in milliseconds
pause: 0, // number, Pause slideshow on click of next/prev or pagination. A positive number will set to true and be the time of pause in milliseconds
hoverPause: false, // boolean, Set to true and hovering over slideshow will pause it
autoHeight: false, // boolean, Set to true to auto adjust height
autoHeightSpeed: 350, // number, Set auto height animation time in milliseconds
bigTarget: false, // boolean, Set to true and the whole slide will link to next slide on click
animationStart: function(){}, // Function called at the start of animation
animationComplete: function(){}, // Function called at the completion of animation
slidesLoaded: function() {} // Function is called when slides is fully loaded
};

// Randomize slide order on load
$.fn.randomize = function(callback) {
function randomizeOrder() { return(Math.round(Math.random())-0.5); }
return($(this).each(function() {
var $this = $(this);
var $children = $this.children();
var childCount = $children.length;
if (childCount > 1) {
$children.hide();
var indices = [];
for (i=0;i<childCount;i++) { indices[indices.length] = i; }
indices = indices.sort(randomizeOrder);
$.each(indices,function(j,k) {
var $child = $children.eq(k);
var $clone = $child.clone(true);
$clone.show().appendTo($this);
if (callback !== undefined) {
callback($child, $clone);
}
$child.remove();
});
}
}));
};
})(jQuery);