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22
app/static/global/plugins/backstretch/LICENSE-MIT Normal file
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Copyright (c) 2012 Scott Robbin
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

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app/static/global/plugins/backstretch/README.md Normal file
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# Backstretch
Backstretch is a simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any page or element. The image will stretch to fit the page/element, and will automatically resize as the window/element size changes.
## Demo
There are a couple of examples included with this package, or feel free to check it out live [on the project page itself](http://srobbin.com/jquery-plugins/backstretch/).
## Setup
Include the jQuery library (version 1.7 or newer) and Backstretch plugin files in your webpage (preferably at the bottom of the page, before the closing BODY tag):
```html
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="jquery.backstretch.min.js"></script>
<script>
// To attach Backstrech as the body's background
$.backstretch("path/to/image.jpg");
// You may also attach Backstretch to a block-level element
$(".foo").backstretch("path/to/image.jpg");
// Or, to start a slideshow, just pass in an array of images
$(".foo").backstretch([
"path/to/image.jpg",
"path/to/image2.jpg",
"path/to/image3.jpg"
], {duration: 4000});
</script>
```
## Options
| Name | Description | Type | Default |
|------|-------------|------|---------|
| `centeredX` | The ratio of the width/height of the image doesn't always jive with the width/height of the window. This parameter controls whether or not we center the image on the X axis to account for the discrepancy. | Boolean | true |
| `centeredY` | This parameter controls whether or not we center the image on the Y axis to account for the aforementioned discrepancy. | Boolean | true |
| `fade` | This is the speed at which the image will fade in. Integers in milliseconds are accepted, as well as standard jQuery speed strings (slow, normal, fast). | Integer or String | 0 |
| `duration` | The amount of time in between slides, when using Backstretch as a slideshow, expressed as the number of milliseconds. | Integer | 5000 |
## Slideshow API
Once you've instantiated a Backstretch slideshow, there are many actions that you can perform it:
```javascript
// Start a slideshow
$('.foo').backstretch([
'path/to/image.jpg',
'path/to/image2.jpg',
'path/to/image3.jpg'
]);
// Pause the slideshow
$('.foo').backstretch("pause");
// Advance to the next slide
$('.foo').backstretch("next");
```
| Method | Description |
|------|-------------|
| `.backstretch("show", n)` | Jump to the slide at a given index, where n is the number of the image that you'd like to display. Slide number starts at 0. |
| `.backstretch("prev")` | Display the previous image in a slideshow. |
| `.backstretch("next")` | Advance to the next image in a slideshow. |
| `.backstretch("pause")` | Pause the slideshow. |
| `.backstretch("resume")` | Resume a paused slideshow. |
| `.backstretch("destroy", preserveBackground)` | Destroy the Backstretch instance. Optionally, you can pass in a Boolean parameter, preserveBackground, to determine whether or not you'd like to keep the current image stretched as the background image. |
| `.backstretch("resize")` | This method is called automatically when the container (window or block-level element) is resized, however you can always call this manually if needed. |
## Public Variables
Sometimes, you'll want to access Backstretch's images after you've instantiated the plugin. For example, perhaps you'd like to be able add more images to a slideshow. Doing so is easy. You can access the images array as follows:
```javascript
$('.foo').backstretch([
'path/to/image.jpg',
'path/to/image2.jpg',
'path/to/image3.jpg'
]);
// Access the instance
var instance = $('.foo').data('backstretch');
// Then, you can manipulate the images array directly
instance.images.push('path/to/image4.jpg')
```
Additionally, the current index of a slideshow is available through the instance as well:
```javascript
$("body").data("backstretch").index;
```
## Events
### backstretch.before
Backstretch will fire a "backstretch.before" event before a new image loads, triggering a function that is passed the event, Backstretch instance, and index of the image that will be displayed. If you listen for that event, you can, for example, coordinate other changes to coincide with your slideshow.
```javascript
$(window).on("backstretch.before", function (e, instance, index) {
// If we wanted to stop the slideshow after it reached the end
if (index === instance.images.length - 1) {
instance.pause();
};
});
```
### backstretch.after
Backstretch will also fire a "backstretch.after" event after the new images has completed loading.
```javascript
$(window).on("backstretch.after", function (e, instance, index) {
// Do something
});
```
## Changelog
### Version 2.0
* Now accepts an array of images to create a slideshow
* Can attach Backstretch to any block-level element, not just the body
* Deprecated "speed" option in favor of "fade" for fadeIn timing
* Added "duration" option, and Slideshow API
### Version 1.2
* You can now called backstretch twice, and it will replace the existing image.
### Version 1.1
* Added 'centeredX' and 'centeredY' options.
* Removed 'hideUntilReady' option. It looks pretty bad if you don't hide the image until it's fully loaded.
* Fixed IE img onload bug.
* Now supports iPhone/iPad orientation changes.

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app/static/global/plugins/backstretch/jquery.backstretch.js Normal file
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/*! Backstretch - v2.0.4 - 2013-06-19
* http://srobbin.com/jquery-plugins/backstretch/
* Copyright (c) 2013 Scott Robbin; Licensed MIT */
;(function ($, window, undefined) {
'use strict';
/* PLUGIN DEFINITION
* ========================= */
$.fn.backstretch = function (images, options) {
// We need at least one image or method name
if (images === undefined || images.length === 0) {
$.error("No images were supplied for Backstretch");
}
/*
* Scroll the page one pixel to get the right window height on iOS
* Pretty harmless for everyone else
*/
if ($(window).scrollTop() === 0 ) {
window.scrollTo(0, 0);
}
return this.each(function () {
var $this = $(this)
, obj = $this.data('backstretch');
// Do we already have an instance attached to this element?
if (obj) {
// Is this a method they're trying to execute?
if (typeof images == 'string' && typeof obj[images] == 'function') {
// Call the method
obj[images](options);
// No need to do anything further
return;
}
// Merge the old options with the new
options = $.extend(obj.options, options);
// Remove the old instance
obj.destroy(true);
}
obj = new Backstretch(this, images, options);
$this.data('backstretch', obj);
});
};
// If no element is supplied, we'll attach to body
$.backstretch = function (images, options) {
// Return the instance
return $('body')
.backstretch(images, options)
.data('backstretch');
};
// Custom selector
$.expr[':'].backstretch = function(elem) {
return $(elem).data('backstretch') !== undefined;
};
/* DEFAULTS
* ========================= */
$.fn.backstretch.defaults = {
centeredX: true // Should we center the image on the X axis?
, centeredY: true // Should we center the image on the Y axis?
, duration: 5000 // Amount of time in between slides (if slideshow)
, fade: 0 // Speed of fade transition between slides
};
/* STYLES
*
* Baked-in styles that we'll apply to our elements.
* In an effort to keep the plugin simple, these are not exposed as options.
* That said, anyone can override these in their own stylesheet.
* ========================= */
var styles = {
wrap: {
left: 0
, top: 0
, overflow: 'hidden'
, margin: 0
, padding: 0
, height: '100%'
, width: '100%'
, zIndex: -999999
}
, img: {
position: 'absolute'
, display: 'none'
, margin: 0
, padding: 0
, border: 'none'
, width: 'auto'
, height: 'auto'
, maxHeight: 'none'
, maxWidth: 'none'
, zIndex: -999999
}
};
/* CLASS DEFINITION
* ========================= */
var Backstretch = function (container, images, options) {
this.options = $.extend({}, $.fn.backstretch.defaults, options || {});
/* In its simplest form, we allow Backstretch to be called on an image path.
* e.g. $.backstretch('/path/to/image.jpg')
* So, we need to turn this back into an array.
*/
this.images = $.isArray(images) ? images : [images];
// Preload images
$.each(this.images, function () {
$('<img />')[0].src = this;
});
// Convenience reference to know if the container is body.
this.isBody = container === document.body;
/* We're keeping track of a few different elements
*
* Container: the element that Backstretch was called on.
* Wrap: a DIV that we place the image into, so we can hide the overflow.
* Root: Convenience reference to help calculate the correct height.
*/
this.$container = $(container);
this.$root = this.isBody ? supportsFixedPosition ? $(window) : $(document) : this.$container;
// Don't create a new wrap if one already exists (from a previous instance of Backstretch)
var $existing = this.$container.children(".backstretch").first();
this.$wrap = $existing.length ? $existing : $('<div class="backstretch"></div>').css(styles.wrap).appendTo(this.$container);
// Non-body elements need some style adjustments
if (!this.isBody) {
// If the container is statically positioned, we need to make it relative,
// and if no zIndex is defined, we should set it to zero.
var position = this.$container.css('position')
, zIndex = this.$container.css('zIndex');
this.$container.css({
position: position === 'static' ? 'relative' : position
, zIndex: zIndex === 'auto' ? 0 : zIndex
, background: 'none'
});
// Needs a higher z-index
this.$wrap.css({zIndex: -999998});
}
// Fixed or absolute positioning?
this.$wrap.css({
position: this.isBody && supportsFixedPosition ? 'fixed' : 'absolute'
});
// Set the first image
this.index = 0;
this.show(this.index);
// Listen for resize
$(window).on('resize.backstretch', $.proxy(this.resize, this))
.on('orientationchange.backstretch', $.proxy(function () {
// Need to do this in order to get the right window height
if (this.isBody && window.pageYOffset === 0) {
window.scrollTo(0, 1);
this.resize();
}
}, this));
};
/* PUBLIC METHODS
* ========================= */
Backstretch.prototype = {
resize: function () {
try {
var bgCSS = {left: 0, top: 0}
, rootWidth = this.isBody ? this.$root.width() : this.$root.innerWidth()
, bgWidth = rootWidth
, rootHeight = this.isBody ? ( window.innerHeight ? window.innerHeight : this.$root.height() ) : this.$root.innerHeight()
, bgHeight = bgWidth / this.$img.data('ratio')
, bgOffset;
// Make adjustments based on image ratio
if (bgHeight >= rootHeight) {
bgOffset = (bgHeight - rootHeight) / 2;
if(this.options.centeredY) {
bgCSS.top = '-' + bgOffset + 'px';
}
} else {
bgHeight = rootHeight;
bgWidth = bgHeight * this.$img.data('ratio');
bgOffset = (bgWidth - rootWidth) / 2;
if(this.options.centeredX) {
bgCSS.left = '-' + bgOffset + 'px';
}
}
this.$wrap.css({width: rootWidth, height: rootHeight})
.find('img:not(.deleteable)').css({width: bgWidth, height: bgHeight}).css(bgCSS);
} catch(err) {
// IE7 seems to trigger resize before the image is loaded.
// This try/catch block is a hack to let it fail gracefully.
}
return this;
}
// Show the slide at a certain position
, show: function (newIndex) {
// Validate index
if (Math.abs(newIndex) > this.images.length - 1) {
return;
}
// Vars
var self = this
, oldImage = self.$wrap.find('img').addClass('deleteable')
, evtOptions = { relatedTarget: self.$container[0] };
// Trigger the "before" event
self.$container.trigger($.Event('backstretch.before', evtOptions), [self, newIndex]);
// Set the new index
this.index = newIndex;
// Pause the slideshow
clearInterval(self.interval);
// New image
self.$img = $('<img />')
.css(styles.img)
.bind('load', function (e) {
var imgWidth = this.width || $(e.target).width()
, imgHeight = this.height || $(e.target).height();
// Save the ratio
$(this).data('ratio', imgWidth / imgHeight);
// Show the image, then delete the old one
// "speed" option has been deprecated, but we want backwards compatibilty
$(this).fadeIn(self.options.speed || self.options.fade, function () {
oldImage.remove();
// Resume the slideshow
if (!self.paused) {
self.cycle();
}
// Trigger the "after" and "show" events
// "show" is being deprecated
$(['after', 'show']).each(function () {
self.$container.trigger($.Event('backstretch.' + this, evtOptions), [self, newIndex]);
});
});
// Resize
self.resize();
})
.appendTo(self.$wrap);
// Hack for IE img onload event
self.$img.attr('src', self.images[newIndex]);
return self;
}
, next: function () {
// Next slide
return this.show(this.index < this.images.length - 1 ? this.index + 1 : 0);
}
, prev: function () {
// Previous slide
return this.show(this.index === 0 ? this.images.length - 1 : this.index - 1);
}
, pause: function () {
// Pause the slideshow
this.paused = true;
return this;
}
, resume: function () {
// Resume the slideshow
this.paused = false;
this.next();
return this;
}
, cycle: function () {
// Start/resume the slideshow
if(this.images.length > 1) {
// Clear the interval, just in case
clearInterval(this.interval);
this.interval = setInterval($.proxy(function () {
// Check for paused slideshow
if (!this.paused) {
this.next();
}
}, this), this.options.duration);
}
return this;
}
, destroy: function (preserveBackground) {
// Stop the resize events
$(window).off('resize.backstretch orientationchange.backstretch');
// Clear the interval
clearInterval(this.interval);
// Remove Backstretch
if(!preserveBackground) {
this.$wrap.remove();
}
this.$container.removeData('backstretch');
}
};
/* SUPPORTS FIXED POSITION?
*
* Based on code from jQuery Mobile 1.1.0
* http://jquerymobile.com/
*
* In a nutshell, we need to figure out if fixed positioning is supported.
* Unfortunately, this is very difficult to do on iOS, and usually involves
* injecting content, scrolling the page, etc.. It's ugly.
* jQuery Mobile uses this workaround. It's not ideal, but works.
*
* Modified to detect IE6
* ========================= */
var supportsFixedPosition = (function () {
var ua = navigator.userAgent
, platform = navigator.platform
// Rendering engine is Webkit, and capture major version
, wkmatch = ua.match( /AppleWebKit\/([0-9]+)/ )
, wkversion = !!wkmatch && wkmatch[ 1 ]
, ffmatch = ua.match( /Fennec\/([0-9]+)/ )
, ffversion = !!ffmatch && ffmatch[ 1 ]
, operammobilematch = ua.match( /Opera Mobi\/([0-9]+)/ )
, omversion = !!operammobilematch && operammobilematch[ 1 ]
, iematch = ua.match( /MSIE ([0-9]+)/ )
, ieversion = !!iematch && iematch[ 1 ];
return !(
// iOS 4.3 and older : Platform is iPhone/Pad/Touch and Webkit version is less than 534 (ios5)
((platform.indexOf( "iPhone" ) > -1 || platform.indexOf( "iPad" ) > -1 || platform.indexOf( "iPod" ) > -1 ) && wkversion && wkversion < 534) ||
// Opera Mini
(window.operamini && ({}).toString.call( window.operamini ) === "[object OperaMini]") ||
(operammobilematch && omversion < 7458) ||
//Android lte 2.1: Platform is Android and Webkit version is less than 533 (Android 2.2)
(ua.indexOf( "Android" ) > -1 && wkversion && wkversion < 533) ||
// Firefox Mobile before 6.0 -
(ffversion && ffversion < 6) ||
// WebOS less than 3
("palmGetResource" in window && wkversion && wkversion < 534) ||
// MeeGo
(ua.indexOf( "MeeGo" ) > -1 && ua.indexOf( "NokiaBrowser/8.5.0" ) > -1) ||
// IE6
(ieversion && ieversion <= 6)
);
}());
}(jQuery, window));

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/*! Backstretch - v2.0.4 - 2013-06-19
* http://srobbin.com/jquery-plugins/backstretch/
* Copyright (c) 2013 Scott Robbin; Licensed MIT */
(function(a,d,p){a.fn.backstretch=function(c,b){(c===p||0===c.length)&&a.error("No images were supplied for Backstretch");0===a(d).scrollTop()&&d.scrollTo(0,0);return this.each(function(){var d=a(this),g=d.data("backstretch");if(g){if("string"==typeof c&&"function"==typeof g[c]){g[c](b);return}b=a.extend(g.options,b);g.destroy(!0)}g=new q(this,c,b);d.data("backstretch",g)})};a.backstretch=function(c,b){return a("body").backstretch(c,b).data("backstretch")};a.expr[":"].backstretch=function(c){return a(c).data("backstretch")!==p};a.fn.backstretch.defaults={centeredX:!0,centeredY:!0,duration:5E3,fade:0};var r={left:0,top:0,overflow:"hidden",margin:0,padding:0,height:"100%",width:"100%",zIndex:-999999},s={position:"absolute",display:"none",margin:0,padding:0,border:"none",width:"auto",height:"auto",maxHeight:"none",maxWidth:"none",zIndex:-999999},q=function(c,b,e){this.options=a.extend({},a.fn.backstretch.defaults,e||{});this.images=a.isArray(b)?b:[b];a.each(this.images,function(){a("<img />")[0].src=this});this.isBody=c===document.body;this.$container=a(c);this.$root=this.isBody?l?a(d):a(document):this.$container;c=this.$container.children(".backstretch").first();this.$wrap=c.length?c:a('<div class="backstretch"></div>').css(r).appendTo(this.$container);this.isBody||(c=this.$container.css("position"),b=this.$container.css("zIndex"),this.$container.css({position:"static"===c?"relative":c,zIndex:"auto"===b?0:b,background:"none"}),this.$wrap.css({zIndex:-999998}));this.$wrap.css({position:this.isBody&&l?"fixed":"absolute"});this.index=0;this.show(this.index);a(d).on("resize.backstretch",a.proxy(this.resize,this)).on("orientationchange.backstretch",a.proxy(function(){this.isBody&&0===d.pageYOffset&&(d.scrollTo(0,1),this.resize())},this))};q.prototype={resize:function(){try{var a={left:0,top:0},b=this.isBody?this.$root.width():this.$root.innerWidth(),e=b,g=this.isBody?d.innerHeight?d.innerHeight:this.$root.height():this.$root.innerHeight(),j=e/this.$img.data("ratio"),f;j>=g?(f=(j-g)/2,this.options.centeredY&&(a.top="-"+f+"px")):(j=g,e=j*this.$img.data("ratio"),f=(e-b)/2,this.options.centeredX&&(a.left="-"+f+"px"));this.$wrap.css({width:b,height:g}).find("img:not(.deleteable)").css({width:e,height:j}).css(a)}catch(h){}return this},show:function(c){if(!(Math.abs(c)>this.images.length-1)){var b=this,e=b.$wrap.find("img").addClass("deleteable"),d={relatedTarget:b.$container[0]};b.$container.trigger(a.Event("backstretch.before",d),[b,c]);this.index=c;clearInterval(b.interval);b.$img=a("<img />").css(s).bind("load",function(f){var h=this.width||a(f.target).width();f=this.height||a(f.target).height();a(this).data("ratio",h/f);a(this).fadeIn(b.options.speed||b.options.fade,function(){e.remove();b.paused||b.cycle();a(["after","show"]).each(function(){b.$container.trigger(a.Event("backstretch."+this,d),[b,c])})});b.resize()}).appendTo(b.$wrap);b.$img.attr("src",b.images[c]);return b}},next:function(){return this.show(this.index<this.images.length-1?this.index+1:0)},prev:function(){return this.show(0===this.index?this.images.length-1:this.index-1)},pause:function(){this.paused=!0;return this},resume:function(){this.paused=!1;this.next();return this},cycle:function(){1<this.images.length&&(clearInterval(this.interval),this.interval=setInterval(a.proxy(function(){this.paused||this.next()},this),this.options.duration));return this},destroy:function(c){a(d).off("resize.backstretch orientationchange.backstretch");clearInterval(this.interval);c||this.$wrap.remove();this.$container.removeData("backstretch")}};var l,f=navigator.userAgent,m=navigator.platform,e=f.match(/AppleWebKit\/([0-9]+)/),e=!!e&&e[1],h=f.match(/Fennec\/([0-9]+)/),h=!!h&&h[1],n=f.match(/Opera Mobi\/([0-9]+)/),t=!!n&&n[1],k=f.match(/MSIE ([0-9]+)/),k=!!k&&k[1];l=!((-1<m.indexOf("iPhone")||-1<m.indexOf("iPad")||-1<m.indexOf("iPod"))&&e&&534>e||d.operamini&&"[object OperaMini]"==={}.toString.call(d.operamini)||n&&7458>t||-1<f.indexOf("Android")&&e&&533>e||h&&6>h||"palmGetResource"in d&&e&&534>e||-1<f.indexOf("MeeGo")&&-1<f.indexOf("NokiaBrowser/8.5.0")||k&&6>=k)})(jQuery,window);