/**
* Copyright (c) 2010 Anders Ekdahl (http://coffeescripter.com/)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
*
* Version: 1.2.4
*
* Demo and documentation: http://coffeescripter.com/code/ad-gallery/
*/
(function($) {
$.fn.adGallery = function(options) {
var defaults = { loader_image: '/Store/Js/loader.gif',
start_at_index: 0,
description_wrapper: false,
thumb_opacity: 0.7,
animate_first_image: false,
animation_speed: 400,
width: false,
height: false,
display_next_and_prev: true,
display_back_and_forward: true,
scroll_jump: 0, // If 0, it jumps the width of the container
slideshow: {
enable: true,
autostart: false,
speed: 5000,
start_label: '自动播放',
stop_label: '停止',
stop_on_scroll: true,
countdown_prefix: '(',
countdown_sufix: ')',
onStart: false,
onStop: false
},
effect: 'slide-hori', // or 'slide-vert', 'fade', or 'resize', 'none'
enable_keyboard_move: true,
cycle: true,
callbacks: {
init: false,
afterImageVisible: false,
beforeImageVisible: false
}
};
var settings = $.extend(false, defaults, options);
if(options && options.slideshow) {
settings.slideshow = $.extend(false, defaults.slideshow, options.slideshow);
};
if(!settings.slideshow.enable) {
settings.slideshow.autostart = false;
};
var galleries = [];
$(this).each(function() {
var gallery = new AdGallery(this, settings);
galleries[galleries.length] = gallery;
});
// Sorry, breaking the jQuery chain because the gallery instances
// are returned so you can fiddle with them
return galleries;
};

function VerticalSlideAnimation(img_container, direction, desc) {
var current_top = parseInt(img_container.css('top'), 10);
if(direction == 'left') {
var old_image_top = '-'+ this.image_wrapper_height +'px';
img_container.css('top', this.image_wrapper_height +'px');
} else {
var old_image_top = this.image_wrapper_height +'px';
img_container.css('top', '-'+ this.image_wrapper_height +'px');
};
if(desc) {
desc.css('bottom', '-'+ desc[0].offsetHeight +'px');
desc.animate({bottom: 0}, this.settings.animation_speed * 2);
};
if(this.current_description) {
this.current_description.animate({bottom: '-'+ this.current_description[0].offsetHeight +'px'}, this.settings.animation_speed * 2);
};
return {old_image: {top: old_image_top},
new_image: {top: current_top}};
};

function HorizontalSlideAnimation(img_container, direction, desc) {
var current_left = parseInt(img_container.css('left'), 10);
if(direction == 'left') {
var old_image_left = '-'+ this.image_wrapper_width +'px';
img_container.css('left',this.image_wrapper_width +'px');
} else {
var old_image_left = this.image_wrapper_width +'px';
img_container.css('left','-'+ this.image_wrapper_width +'px');
};
if(desc) {
desc.css('bottom', '-'+ desc[0].offsetHeight +'px');
desc.animate({bottom: 0}, this.settings.animation_speed * 2);
};
if(this.current_description) {
this.current_description.animate({bottom: '-'+ this.current_description[0].offsetHeight +'px'}, this.settings.animation_speed * 2);
};
return {old_image: {left: old_image_left},
new_image: {left: current_left}};
};

function ResizeAnimation(img_container, direction, desc) {
var image_width = img_container.width();
var image_height = img_container.height();
var current_left = parseInt(img_container.css('left'), 10);
var current_top = parseInt(img_container.css('top'), 10);
img_container.css({width: 0, height: 0, top: this.image_wrapper_height / 2, left: this.image_wrapper_width / 2});
return {old_image: {width: 0,
height: 0,
top: this.image_wrapper_height / 2,
left: this.image_wrapper_width / 2},
new_image: {width: image_width,
height: image_height,
top: current_top,
left: current_left}};
};

function FadeAnimation(img_container, direction, desc) {
img_container.css('opacity', 0);
return {old_image: {opacity: 0},
new_image: {opacity: 1}};
};

// Sort of a hack, will clean this up... eventually
function NoneAnimation(img_container, direction, desc) {
img_container.css('opacity', 0);
return {old_image: {opacity: 0},
new_image: {opacity: 1},
speed: 0};
};

function AdGallery(wrapper, settings) {
this.init(wrapper, settings);
};
AdGallery.prototype = {
// Elements
wrapper: false,
image_wrapper: false,
gallery_info: false,
nav: false,
loader: false,
preloads: false,
thumbs_wrapper: false,
scroll_back: false,
scroll_forward: false,
next_link: false,
prev_link: false,

slideshow: false,
image_wrapper_width: 0,
image_wrapper_height: 0,
current_index: 0,
current_image: false,
current_description: false,
nav_display_width: 0,
settings: false,
images: false,
in_transition: false,
animations: false,
init: function(wrapper, settings) {
var context = this;
this.wrapper = $(wrapper);
this.settings = settings;
this.setupElements();
this.setupAnimations();
if(this.settings.width) {
this.image_wrapper_width = this.settings.width;
this.image_wrapper.width(this.settings.width);
this.wrapper.width(this.settings.width);
} else {
this.image_wrapper_width = this.image_wrapper.width();
};
if(this.settings.height) {
this.image_wrapper_height = this.settings.height;
this.image_wrapper.height(this.settings.height);
} else {
this.image_wrapper_height = this.image_wrapper.height();
};
this.nav_display_width = this.nav.width();
this.current_index = 0;
this.current_image = false;
this.current_description = false;
this.in_transition = false;
this.findImages();
if(this.settings.display_next_and_prev) {
this.initNextAndPrev();
};
// The slideshow needs a callback to trigger the next image to be shown
// but we don't want to give it access to the whole gallery instance
var nextimage_callback = function(callback) {
return context.nextImage(callback);
};
this.slideshow = new AdGallerySlideshow(nextimage_callback, this.settings.slideshow);
this.controls.append(this.slideshow.create());
if(this.settings.slideshow.enable) {
this.slideshow.enable();
} else {
this.slideshow.disable();
};
if(this.settings.display_back_and_forward) {
this.initBackAndForward();
};
if(this.settings.enable_keyboard_move) {
this.initKeyEvents();
};
var start_at = parseInt(this.settings.start_at_index, 10);
if(window.location.hash && window.location.hash.indexOf('#ad-image') === 0) {
start_at = window.location.hash.replace(/[^0-9]+/g, '');
// Check if it's a number
if((start_at * 1) != start_at) {
start_at = this.settings.start_at_index;
};
};

this.loading(true);
this.showImage(start_at,
function() {
// We don't want to start the slideshow before the image has been
// displayed
if(context.settings.slideshow.autostart) {
context.preloadImage(start_at + 1);
context.slideshow.start();
};
}
);
this.fireCallback(this.settings.callbacks.init);
},
setupAnimations: function() {
this.animations = {
'slide-vert': VerticalSlideAnimation,
'slide-hori': HorizontalSlideAnimation,
'resize': ResizeAnimation,
'fade': FadeAnimation,
'none': NoneAnimation
};
},
setupElements: function() {
this.controls = this.wrapper.find('.ad-controls');
this.gallery_info = $('<p class="ad-info"></p>');
this.controls.append(this.gallery_info);
this.image_wrapper = this.wrapper.find('.ad-image-wrapper');
this.image_wrapper.empty();
this.nav = this.wrapper.find('.ad-nav');
this.thumbs_wrapper = this.nav.find('.ad-thumbs');
this.preloads = $('<div class="ad-preloads"></div>');
this.loader = $('<img class="ad-loader" src="'+ this.settings.loader_image +'">');
this.image_wrapper.append(this.loader);
this.loader.hide();
$(document.body).append(this.preloads);
},
loading: function(bool) {
if(bool) {
this.loader.show();
} else {
this.loader.hide();
};
},
addAnimation: function(name, fn) {
if($.isFunction(fn)) {
this.animations[name] = fn;
};
},
findImages: function() {
var context = this;
this.images = [];
var thumb_wrapper_width = 0;
var thumbs_loaded = 0;
var thumbs = this.thumbs_wrapper.find('a');
var thumb_count = thumbs.length;
if(this.settings.thumb_opacity < 1) {
thumbs.find('img').css('opacity', this.settings.thumb_opacity);
};
thumbs.each(
function(i) {
var link = $(this);
var image_src = link.attr('href');
var thumb = link.find('img');
// Check if the thumb has already loaded
if(!context.isImageLoaded(thumb[0])) {
thumb.load(
function() {
thumb_wrapper_width += this.parentNode.parentNode.offsetWidth;
thumbs_loaded++;
}
);
} else{
thumb_wrapper_width += thumb[0].parentNode.parentNode.offsetWidth;
thumbs_loaded++;
};
link.addClass('ad-thumb'+ i);
link.click(
function() {
context.showImage(i);
context.slideshow.stop();
return false;
}
).hover(
function() {
if(!$(this).is('.ad-active') && context.settings.thumb_opacity < 1) {
$(this).find('img').fadeTo(300, 1);
};
context.preloadImage(i);
},
function() {
if(!$(this).is('.ad-active') && context.settings.thumb_opacity < 1) {
$(this).find('img').fadeTo(300, context.settings.thumb_opacity);
};
}
);
var link = false;
if(thumb.data('ad-link')) {
link = thumb.data('ad-link');
} else if(thumb.attr('longdesc') && thumb.attr('longdesc').length) {
link = thumb.attr('longdesc');
};
var desc = false;
if(thumb.data('ad-desc')) {
desc = thumb.data('ad-desc');
} else if(thumb.attr('alt') && thumb.attr('alt').length) {
desc = thumb.attr('alt');
};
var title = false;
if(thumb.data('ad-title')) {
title = thumb.data('ad-title');
} else if(thumb.attr('title') && thumb.attr('title').length) {
title = thumb.attr('title');
};
context.images[i] = { thumb: thumb.attr('src'), image: image_src, error: false,
		preloaded: false, desc: desc, title: title, size: false,
		link: link };
}
);
// Wait until all thumbs are loaded, and then set the width of the ul
var inter = setInterval(
function() {
if(thumb_count == thumbs_loaded) {
thumb_wrapper_width -= 100;
var list = context.nav.find('.ad-thumb-list');
list.css('width', thumb_wrapper_width +'px');
var i = 1;
var last_height = list.height();
while(i < 201) {
list.css('width', (thumb_wrapper_width + i) +'px');
if(last_height != list.height()) {
break;
}
last_height = list.height();
i++;
}
clearInterval(inter);
};
},
100
);
},
initKeyEvents: function() {
var context = this;
$(document).keydown(
function(e) {
if(e.keyCode == 39) {
// right arrow
context.nextImage();
context.slideshow.stop();
} else if(e.keyCode == 37) {
// left arrow
context.prevImage();
context.slideshow.stop();
};
}
);
},
initNextAndPrev: function() {
this.next_link = $('<div class="ad-next"><div class="ad-next-image"></div></div>');
this.prev_link = $('<div class="ad-prev"><div class="ad-prev-image"></div></div>');
this.image_wrapper.append(this.next_link);
this.image_wrapper.append(this.prev_link);
var context = this;
this.prev_link.add(this.next_link).mouseover(
function(e) {
// IE 6 hides the wrapper div, so we have to set it's width
$(this).css('height', context.image_wrapper_height);
$(this).find('div').show();
}
).mouseout(
function(e) {
$(this).find('div').hide();
}
).click(
function() {
if($(this).is('.ad-next')) {
context.nextImage();
context.slideshow.stop();
} else {
context.prevImage();
context.slideshow.stop();
};
}
).find('div').css('opacity', 0.7);
},
initBackAndForward: function() {
var context = this;
this.scroll_forward = $('<div class="ad-forward"></div>');
this.scroll_back = $('<div class="ad-back"></div>');
this.nav.append(this.scroll_forward);
this.nav.prepend(this.scroll_back);
var has_scrolled = 0;
var thumbs_scroll_interval = false;
$(this.scroll_back).add(this.scroll_forward).click(
function() {
// We don't want to jump the whole width, since an image
// might be cut at the edge
var width = context.nav_display_width - 50;
if(context.settings.scroll_jump > 0) {
var width = context.settings.scroll_jump;
};
if($(this).is('.ad-forward')) {
var left = context.thumbs_wrapper.scrollLeft() + width;
} else {
var left = context.thumbs_wrapper.scrollLeft() - width;
};
if(context.settings.slideshow.stop_on_scroll) {
context.slideshow.stop();
};
context.thumbs_wrapper.animate({scrollLeft: left +'px'});
return false;
}
).css('opacity', 0.6).hover(
function() {
var direction = 'left';
if($(this).is('.ad-forward')) {
direction = 'right';
};
thumbs_scroll_interval = setInterval(
function() {
has_scrolled++;
// Don't want to stop the slideshow just because we scrolled a pixel or two
if(has_scrolled > 30 && context.settings.slideshow.stop_on_scroll) {
context.slideshow.stop();
};
var left = context.thumbs_wrapper.scrollLeft() + 1;
if(direction == 'left') {
left = context.thumbs_wrapper.scrollLeft() - 1;
};
context.thumbs_wrapper.scrollLeft(left);
},
10
);
$(this).css('opacity', 1);
},
function() {
has_scrolled = 0;
clearInterval(thumbs_scroll_interval);
$(this).css('opacity', 0.6);
}
);
},
_afterShow: function() {
this.gallery_info.html((this.current_index + 1) +' / '+ this.images.length);
if(!this.settings.cycle) {
// Needed for IE
this.prev_link.show().css('height', this.image_wrapper_height);
this.next_link.show().css('height', this.image_wrapper_height);
if(this.current_index == (this.images.length - 1)) {
this.next_link.hide();
};
if(this.current_index == 0) {
this.prev_link.hide();
};
};
this.fireCallback(this.settings.callbacks.afterImageVisible);
},
/**
* Checks if the image is small enough to fit inside the container
* If it's not, shrink it proportionally
*/
_getContainedImageSize: function(image_width, image_height) {
if(image_height > this.image_wrapper_height) {
var ratio = image_width / image_height;
image_height = this.image_wrapper_height;
image_width = this.image_wrapper_height * ratio;
};
if(image_width > this.image_wrapper_width) {
var ratio = image_height / image_width;
image_width = this.image_wrapper_width;
image_height = this.image_wrapper_width * ratio;
};
return {width: image_width, height: image_height};
},
/**
* If the image dimensions are smaller than the wrapper, we position
* it in the middle anyway
*/
_centerImage: function(img_container, image_width, image_height) {
img_container.css('top', '0px');
if(image_height < this.image_wrapper_height) {
var dif = this.image_wrapper_height - image_height;
img_container.css('top', (dif / 2) +'px');
};
img_container.css('left', '0px');
if(image_width < this.image_wrapper_width) {
var dif = this.image_wrapper_width - image_width;
img_container.css('left', (dif / 2) +'px');
};
},
_getDescription: function(image) {
var desc = false;
if(image.desc.length || image.title.length) {
var title = '';
if(image.title.length) {
title = '<strong class="ad-description-title">'+ image.title +'</strong>';
};
var desc = '';
if(image.desc.length) {
desc = '<span>'+ image.desc +'</span>';
};
desc = $('<p class="ad-image-description">'+ title + desc +'</p>');
};
return desc;
},
/**
* @param function callback Gets fired when the image has loaded, is displaying
*                          and it's animation has finished
*/
showImage: function(index, callback) {
if(this.images[index] && !this.in_transition) {
var context = this;
var image = this.images[index];
this.in_transition = true;
if(!image.preloaded) {
this.loading(true);
this.preloadImage(index, function() {
context.loading(false);
context._showWhenLoaded(index, callback);
});
} else {
this._showWhenLoaded(index, callback);
};
};
},
/**
* @param function callback Gets fired when the image has loaded, is displaying
*                          and it's animation has finished
*/
_showWhenLoaded: function(index, callback) {
if(this.images[index]) {
var context = this;
var image = this.images[index];
var img_container = $(document.createElement('div')).addClass('ad-image');
var img = $(new Image()).attr('src', image.image);
if(image.link) {
var link = $('<a href="'+ image.link +'" target="_blank"></a>');
link.append(img);
img_container.append(link);
} else {
img_container.append(img);
}
this.image_wrapper.prepend(img_container);
var size = this._getContainedImageSize(image.size.width, image.size.height);
img.attr('width', size.width);
img.attr('height', size.height);
img_container.css({width: size.width +'px', height: size.height +'px'});
this._centerImage(img_container, size.width, size.height);
var desc = this._getDescription(image, img_container);
if(desc) {
if(!this.settings.description_wrapper) {
img_container.append(desc);
var width = size.width - parseInt(desc.css('padding-left'), 10) - parseInt(desc.css('padding-right'), 10);
desc.css('width', width +'px');
} else {
this.settings.description_wrapper.append(desc);
}
};
this.highLightThumb(this.nav.find('.ad-thumb'+ index));

var direction = 'right';
if(this.current_index < index) {
direction = 'left';
};
this.fireCallback(this.settings.callbacks.beforeImageVisible);
if(this.current_image || this.settings.animate_first_image) {
var animation_speed = this.settings.animation_speed;
var easing = 'swing';
var animation = this.animations[this.settings.effect].call(this, img_container, direction, desc);
if(typeof animation.speed != 'undefined') {
animation_speed = animation.speed;
};
if(typeof animation.easing != 'undefined') {
easing = animation.easing;
};
if(this.current_image) {
var old_image = this.current_image;
var old_description = this.current_description;
old_image.animate(animation.old_image, animation_speed, easing,
function() {
old_image.remove();
if(old_description) old_description.remove();
}
);
};
img_container.animate(animation.new_image, animation_speed, easing,
function() {
context.current_index = index;
context.current_image = img_container;
context.current_description = desc;
context.in_transition = false;
context._afterShow();
context.fireCallback(callback);
}
);
} else {
this.current_index = index;
this.current_image = img_container;
context.current_description = desc;
this.in_transition = false;
context._afterShow();
this.fireCallback(callback);
};
};
},
nextIndex: function() {
if(this.current_index == (this.images.length - 1)) {
if(!this.settings.cycle) {
return false;
};
var next = 0;
} else {
var next = this.current_index + 1;
};
return next;
},
nextImage: function(callback) {
var next = this.nextIndex();
if(next === false) return false;
this.preloadImage(next + 1);
this.showImage(next, callback);
return true;
},
prevIndex: function() {
if(this.current_index == 0) {
if(!this.settings.cycle) {
return false;
};
var prev = this.images.length - 1;
} else {
var prev = this.current_index - 1;
};
return prev;
},
prevImage: function(callback) {
var prev = this.prevIndex();
if(prev === false) return false;
this.preloadImage(prev - 1);
this.showImage(prev, callback);
return true;
},
preloadAll: function() {
var context = this;
var i = 0;
function preloadNext() {
if(i < context.images.length) {
i++;
context.preloadImage(i, preloadNext);
};
};
context.preloadImage(i, preloadNext);
},
preloadImage: function(index, callback) {
if(this.images[index]) {
var image = this.images[index];
if(!this.images[index].preloaded) {
var img = $(new Image());
img.attr('src', image.image);
if(!this.isImageLoaded(img[0])) {
this.preloads.append(img);
var context = this;
img.load(
function() {
image.preloaded = true;
image.size = { width: this.width, height: this.height };
context.fireCallback(callback);
}
).error(
function() {
image.error = true;
image.preloaded = false;
image.size = false;
}
);
} else {
image.preloaded = true;
image.size = { width: img[0].width, height: img[0].height };
this.fireCallback(callback);
};
} else {
this.fireCallback(callback);
};
};
},
isImageLoaded: function(img) {
if(typeof img.complete != 'undefined' && !img.complete) {
return false;
};
if(typeof img.naturalWidth != 'undefined' && img.naturalWidth == 0) {
return false;
};
return true;
},
highLightThumb: function(thumb) {
this.thumbs_wrapper.find('.ad-active').removeClass('ad-active');
thumb.addClass('ad-active');
if(this.settings.thumb_opacity < 1) {
this.thumbs_wrapper.find('a:not(.ad-active) img').fadeTo(300, this.settings.thumb_opacity);
thumb.find('img').fadeTo(300, 1);
};
var left = thumb[0].parentNode.offsetLeft;
left -= (this.nav_display_width / 2) - (thumb[0].offsetWidth / 2);
this.thumbs_wrapper.animate({scrollLeft: left +'px'});
},
fireCallback: function(fn) {
if($.isFunction(fn)) {
fn.call(this);
};
}
};

function AdGallerySlideshow(nextimage_callback, settings) {
this.init(nextimage_callback, settings);
};
AdGallerySlideshow.prototype = {
start_link: false,
stop_link: false,
countdown: false,
controls: false,

settings: false,
nextimage_callback: false,
enabled: false,
running: false,
countdown_interval: false,
init: function(nextimage_callback, settings) {
var context = this;
this.nextimage_callback = nextimage_callback;
this.settings = settings;
},
create: function() {
this.start_link = $('<span class="ad-slideshow-start">'+ this.settings.start_label +'</span>');
this.stop_link = $('<span class="ad-slideshow-stop">'+ this.settings.stop_label +'</span>');
this.countdown = $('<span class="ad-slideshow-countdown"></span>');
this.controls = $('<div class="ad-slideshow-controls"></div>');
this.controls.append(this.start_link).append(this.stop_link).append(this.countdown);
this.countdown.hide();

var context = this;
this.start_link.click(
function() {
context.start();
}
);
this.stop_link.click(
function() {
context.stop();
}
);
$(document).keydown(
function(e) {
if(e.keyCode == 83) {
// 's'
if(context.running) {
context.stop();
} else {
context.start();
};
};
}
);
return this.controls;
},
disable: function() {
this.enabled = false;
this.stop();
this.controls.hide();
},
enable: function() {
this.enabled = true;
this.controls.show();
},
toggle: function() {
if(this.enabled) {
this.disable();
} else {
this.enable();
};
},
start: function() {
if(this.running || !this.enabled) return false;
var context = this;
this.running = true;
this.controls.addClass('ad-slideshow-running');
this._next();
this.fireCallback(this.settings.onStart);
return true;
},
stop: function() {
if(!this.running) return false;
this.running = false;
this.countdown.hide();
this.controls.removeClass('ad-slideshow-running');
clearInterval(this.countdown_interval);
this.fireCallback(this.settings.onStop);
return true;
},
_next: function() {
var context = this;
var pre = this.settings.countdown_prefix;
var su = this.settings.countdown_sufix;
clearInterval(context.countdown_interval);
this.countdown.show().html(pre + (this.settings.speed / 1000) + su);
var slide_timer = 0;
this.countdown_interval = setInterval(
function() {
slide_timer += 1000;
if(slide_timer >= context.settings.speed) {
var whenNextIsShown = function() {
// A check so the user hasn't stoped the slideshow during the
// animation
if(context.running) {
context._next();
};
slide_timer = 0;
};
if(!context.nextimage_callback(whenNextIsShown)) {
context.stop();
};
slide_timer = 0;
};
var sec = parseInt(context.countdown.text().replace(/[^0-9]/g, ''), 10);
sec--;
if(sec > 0) {
context.countdown.html(pre + sec + su);
};
},
1000
);
},
fireCallback: function(fn) {
if($.isFunction(fn)) {
fn.call(this);
};
}
};
})(jQuery);