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if(typeof Prototype == 'undefined' || !Prototype.Version.match("1.6"))
throw("Prototype-UI library require Prototype library >= 1.6.0");
if (Prototype.Browser.WebKit) {
Prototype.Browser.WebKitVersion = parseFloat(navigator.userAgent.match(/AppleWebKit\/([\d\.\+]*)/)[1]);
Prototype.Browser.Safari2 = (Prototype.Browser.WebKitVersion < 420);
}
if (Prototype.Browser.IE) {
Prototype.Browser.IEVersion = parseFloat(navigator.appVersion.split(';')[1].strip().split(' ')[1]);
Prototype.Browser.IE6 = Prototype.Browser.IEVersion == 6;
Prototype.Browser.IE7 = Prototype.Browser.IEVersion == 7;
}
Prototype.falseFunction = function() { return false };
Prototype.trueFunction = function() { return true };
var UI = {
Abstract: { },
Ajax: { }
};
Object.extend(Class.Methods, {
extend: Object.extend.methodize(),
addMethods: Class.Methods.addMethods.wrap(function(proceed, source) {
// ensure we are not trying to add null or undefined
if (!source) return this;
// no callback, vanilla way
if (!source.hasOwnProperty('methodsAdded'))
return proceed(source);
var callback = source.methodsAdded;
delete source.methodsAdded;
proceed(source);
callback.call(source, this);
source.methodsAdded = callback;
return this;
}),
addMethod: function(name, lambda) {
var methods = {};
methods[name] = lambda;
return this.addMethods(methods);
},
method: function(name) {
return this.prototype[name].valueOf();
},
classMethod: function() {
$A(arguments).flatten().each(function(method) {
this[method] = (function() {
return this[method].apply(this, arguments);
}).bind(this.prototype);
}, this);
return this;
},
// prevent any call to this method
undefMethod: function(name) {
this.prototype[name] = undefined;
return this;
},
// remove the class' own implementation of this method
removeMethod: function(name) {
delete this.prototype[name];
return this;
},
aliasMethod: function(newName, name) {
this.prototype[newName] = this.prototype[name];
return this;
},
aliasMethodChain: function(target, feature) {
feature = feature.camelcase();
this.aliasMethod(target+"Without"+feature, target);
this.aliasMethod(target, target+"With"+feature);
return this;
}
});
Object.extend(Number.prototype, {
// Snap a number to a grid
snap: function(round) {
return parseInt(round == 1 ? this : (this / round).floor() * round);
}
});
/*
Interface: String
*/
Object.extend(String.prototype, {
camelcase: function() {
var string = this.dasherize().camelize();
return string.charAt(0).toUpperCase() + string.slice(1);
},
makeElement: function() {
var wrapper = new Element('div'); wrapper.innerHTML = this;
return wrapper.down();
}
});
Object.extend(Array.prototype, {
empty: function() {
return !this.length;
},
extractOptions: function() {
return this.last().constructor === Object ? this.pop() : { };
},
removeAt: function(index) {
var object = this[index];
this.splice(index, 1);
return object;
},
remove: function(object) {
var index;
while ((index = this.indexOf(object)) != -1)
this.removeAt(index);
return object;
},
insert: function(index) {
var args = $A(arguments);
args.shift();
this.splice.apply(this, [ index, 0 ].concat(args));
return this;
}
});
Element.addMethods({
getScrollDimensions: function(element) {
return {
width: element.scrollWidth,
height: element.scrollHeight
}
},
getScrollOffset: function(element) {
return Element._returnOffset(element.scrollLeft, element.scrollTop);
},
setScrollOffset: function(element, offset) {
element = $(element);
if (arguments.length == 3)
offset = { left: offset, top: arguments[2] };
element.scrollLeft = offset.left;
element.scrollTop = offset.top;
return element;
},
// returns "clean" numerical style (without "px") or null if style can not be resolved
// or is not numeric
getNumStyle: function(element, style) {
var value = parseFloat($(element).getStyle(style));
return isNaN(value) ? null : value;
},
// by Tobie Langel (http://tobielangel.com/2007/5/22/prototype-quick-tip)
appendText: function(element, text) {
element = $(element);
text = String.interpret(text);
element.appendChild(document.createTextNode(text));
return element;
}
});
document.whenReady = function(callback) {
if (document.loaded)
callback.call(document);
else
document.observe('dom:loaded', callback);
};
Object.extend(document.viewport, {
// Alias this method for consistency
getScrollOffset: document.viewport.getScrollOffsets,
setScrollOffset: function(offset) {
Element.setScrollOffset(Prototype.Browser.WebKit ? document.body : document.documentElement, offset);
},
getScrollDimensions: function() {
return Element.getScrollDimensions(Prototype.Browser.WebKit ? document.body : document.documentElement);
}
});
(function() {
UI.Options = {
methodsAdded: function(klass) {
klass.classMethod($w(' setOptions allOptions optionsGetter optionsSetter optionsAccessor '));
},
// Group: Methods
/*
Method: setOptions
Extends object's *options* property with the given object
*/
setOptions: function(options) {
if (!this.hasOwnProperty('options'))
this.options = this.allOptions();
this.options = Object.extend(this.options, options || {});
},
/*
Method: allOptions
Computes the complete default options hash made by reverse extending all superclasses
default options.
> Widget.prototype.allOptions();
*/
allOptions: function() {
var superclass = this.constructor.superclass, ancestor = superclass && superclass.prototype;
return (ancestor && ancestor.allOptions) ?
Object.extend(ancestor.allOptions(), this.options) :
Object.clone(this.options);
},
/*
Method: optionsGetter
Creates default getters for option names given as arguments.
With no argument, creates getters for all option names.
*/
optionsGetter: function() {
addOptionsAccessors(this, arguments, false);
},
/*
Method: optionsSetter
Creates default setters for option names given as arguments.
With no argument, creates setters for all option names.
*/
optionsSetter: function() {
addOptionsAccessors(this, arguments, true);
},
/*
Method: optionsAccessor
Creates default getters/setters for option names given as arguments.
With no argument, creates accessors for all option names.
*/
optionsAccessor: function() {
this.optionsGetter.apply(this, arguments);
this.optionsSetter.apply(this, arguments);
}
};
// Internal
function addOptionsAccessors(receiver, names, areSetters) {
names = $A(names).flatten();
if (names.empty())
names = Object.keys(receiver.allOptions());
names.each(function(name) {
var accessorName = (areSetters ? 'set' : 'get') + name.camelcase();
receiver[accessorName] = receiver[accessorName] || (areSetters ?
// Setter
function(value) { return this.options[name] = value } :
// Getter
function() { return this.options[name] });
});
}
})();
/*
Class: UI.Carousel
Main class to handle a carousel of elements in a page. A carousel :
* could be vertical or horizontal
* works with liquid layout
* is designed by CSS
Assumptions:
* Elements should be from the same size
Example:
> ...
> <div id="horizontal_carousel">
> <div class="previous_button"></div>
> <div class="container">
> <ul>
> <li> What ever you like</li>
> </ul>
> </div>
> <div class="next_button"></div>
> </div>
> <script>
> new UI.Carousel("horizontal_carousel");
> </script>
> ...
*/
UI.Carousel = Class.create(UI.Options, {
// Group: Options
options: {
// Property: direction
// Can be horizontal or vertical, horizontal by default
direction : "horizontal",
// Property: previousButton
// Selector of previous button inside carousel element, ".previous_button" by default,
// set it to false to ignore previous button
previousButton : ".previous_button",
// Property: nextButton
// Selector of next button inside carousel element, ".next_button" by default,
// set it to false to ignore next button
nextButton : ".next_button",
// Property: container
// Selector of carousel container inside carousel element, ".container" by default,
container : ".container",
// Property: scrollInc
// Define the maximum number of elements that gonna scroll each time, auto by default
scrollInc : "auto",
// Property: disabledButtonSuffix
// Define the suffix classanme used when a button get disabled, to '_disabled' by default
// Previous button classname will be previous_button_disabled
disabledButtonSuffix : '_disabled',
// Property: overButtonSuffix
// Define the suffix classanme used when a button has a rollover status, '_over' by default
// Previous button classname will be previous_button_over
overButtonSuffix : '_over'
},
/*
Group: Attributes
Property: element
DOM element containing the carousel
Property: id
DOM id of the carousel's element
Property: container
DOM element containing the carousel's elements
Property: elements
Array containing the carousel's elements as DOM elements
Property: previousButton
DOM id of the previous button
Property: nextButton
DOM id of the next button
Property: posAttribute
Define if the positions are from left or top
Property: dimAttribute
Define if the dimensions are horizontal or vertical
Property: elementSize
Size of each element, it's an integer
Property: nbVisible
Number of visible elements, it's a float
Property: animating
Define whether the carousel is in animation or not
*/
/*
Group: Events
List of events fired by a carousel
Notice: Carousel custom events are automatically namespaced in "carousel:" (see Prototype custom events).
Examples:
This example will observe all carousels
> document.observe('carousel:scroll:ended', function(event) {
> alert("Carousel with id " + event.memo.carousel.id + " has just been scrolled");
> });
This example will observe only this carousel
> new UI.Carousel('horizontal_carousel').observe('scroll:ended', function(event) {
> alert("Carousel with id " + event.memo.carousel.id + " has just been scrolled");
> });
Property: previousButton:enabled
Fired when the previous button has just been enabled
Property: previousButton:disabled
Fired when the previous button has just been disabled
Property: nextButton:enabled
Fired when the next button has just been enabled
Property: nextButton:disabled
Fired when the next button has just been disabled
Property: scroll:started
Fired when a scroll has just started
Property: scroll:ended
Fired when a scroll has been done,
memo.shift = number of elements scrolled, it's a float
Property: sizeUpdated
Fired when the carousel size has just been updated.
Tips: memo.carousel.currentSize() = the new carousel size
*/
// Group: Constructor
/*
Method: initialize
Constructor function, should not be called directly
Parameters:
element - DOM element
options - (Hash) list of optional parameters
Returns:
this
*/
initialize: function(element, options) {
this.setOptions(options);
this.element = $(element);
this.id = this.element.id;
this.container = this.element.down(this.options.container).firstDescendant();
this.elements = this.container.childElements();
this.previousButton = this.options.previousButton == false ? null : this.element.down(this.options.previousButton);
this.nextButton = this.options.nextButton == false ? null : this.element.down(this.options.nextButton);
this.posAttribute = (this.options.direction == "horizontal" ? "left" : "top");
this.dimAttribute = (this.options.direction == "horizontal" ? "width" : "height");
this.elementSize = this.computeElementSize();
this.nbVisible = this.currentSize() / this.elementSize;
var scrollInc = this.options.scrollInc;
if (scrollInc == "auto")
scrollInc = Math.floor(this.nbVisible);
[ this.previousButton, this.nextButton ].each(function(button) {
if (!button) return;
var className = (button == this.nextButton ? "next_button" : "previous_button") + this.options.overButtonSuffix;
button.clickHandler = this.scroll.bind(this, (button == this.nextButton ? -1 : 1) * scrollInc * this.elementSize);
button.observe("click", button.clickHandler)
}, this);
this.updateButtons();
},
// Group: Destructor
/*
Method: destroy
Cleans up DOM and memory
*/
destroy: function($super) {
[ this.previousButton, this.nextButton ].each(function(button) {
if (!button) return;
button.stopObserving("click", button.clickHandler);
}, this);
this.element.remove();
this.fire('destroyed');
},
// Group: Event handling
/*
Method: fire
Fires a carousel custom event automatically namespaced in "carousel:" (see Prototype custom events).
The memo object contains a "carousel" property referring to the carousel.
Example:
> document.observe('carousel:scroll:ended', function(event) {
> alert("Carousel with id " + event.memo.carousel.id + " has just been scrolled");
> });
Parameters:
eventName - an event name
memo - a memo object
Returns:
fired event
*/
fire: function(eventName, memo) {
memo = memo || { };
memo.carousel = this;
return this.element.fire('carousel:' + eventName, memo);
},
/*
Method: observe
Observe a carousel event with a handler function automatically bound to the carousel
Parameters:
eventName - an event name
handler - a handler function
Returns:
this
*/
observe: function(eventName, handler) {
this.element.observe('carousel:' + eventName, handler.bind(this));
return this;
},
/*
Method: stopObserving
Unregisters a carousel event, it must take the same parameters as this.observe (see Prototype stopObserving).
Parameters:
eventName - an event name
handler - a handler function
Returns:
this
*/
stopObserving: function(eventName, handler) {
this.element.stopObserving('carousel:' + eventName, handler);
return this;
},
// Group: Actions
/*
Method: checkScroll
Check scroll position to avoid unused space at right or bottom
Parameters:
position - position to check
updatePosition - should the container position be updated ? true/false
Returns:
position
*/
checkScroll: function(position, updatePosition) {
if (position > 0)
position = 0;
else {
var limit = this.elements.last().positionedOffset()[this.posAttribute] + this.elementSize;
var carouselSize = this.currentSize();
if (position + limit < carouselSize)
position += carouselSize - (position + limit);
position = Math.min(position, 0);
}
if (updatePosition)
this.container.style[this.posAttribute] = position + "px";
return position;
},
/*
Method: scroll
Scrolls carousel from maximum deltaPixel
Parameters:
deltaPixel - a float
Returns:
this
*/
scroll: function(deltaPixel) {
if (this.animating)
return this;
// Compute new position
var position = this.currentPosition() + deltaPixel;
// Check bounds
position = this.checkScroll(position, false);
// Compute shift to apply
deltaPixel = position - this.currentPosition();
if (deltaPixel != 0) {
this.animating = true;
this.fire("scroll:started");
var that = this;
// Move effects
this.container.morph("opacity:0.5", {duration: 0.2, afterFinish: function() {
that.container.morph(that.posAttribute + ": " + position + "px", {
duration: 0.4,
delay: 0.2,
afterFinish: function() {
that.container.morph("opacity:1", {
duration: 0.2,
afterFinish: function() {
that.animating = false;
that.updateButtons()
.fire("scroll:ended", { shift: deltaPixel / that.currentSize() });
}
});
}
});
}});
}
return this;
},
/*
Method: scrollTo
Scrolls carousel, so that element with specified index is the left-most.
This method is convenient when using carousel in a tabbed navigation.
Clicking on first tab should scroll first container into view, clicking on a fifth - fifth one, etc.
Indexing starts with 0.
Parameters:
Index of an element which will be a left-most visible in the carousel
Returns:
this
*/
scrollTo: function(index) {
if (this.animating || index < 0 || index > this.elements.length || index == this.currentIndex() || isNaN(parseInt(index)))
return this;
return this.scroll((this.currentIndex() - index) * this.elementSize);
},
/*
Method: updateButtons
Update buttons status to enabled or disabled
Them status is defined by classNames and fired as carousel's custom events
Returns:
this
*/
updateButtons: function() {
this.updatePreviousButton();
this.updateNextButton();
return this;
},
updatePreviousButton: function() {
var position = this.currentPosition();
var previousClassName = "previous_button" + this.options.disabledButtonSuffix;
if (this.previousButton.hasClassName(previousClassName) && position != 0) {
this.previousButton.removeClassName(previousClassName);
this.fire('previousButton:enabled');
}
if (!this.previousButton.hasClassName(previousClassName) && position == 0) {
this.previousButton.addClassName(previousClassName);
this.fire('previousButton:disabled');
}
},
updateNextButton: function() {
var lastPosition = this.currentLastPosition();
var size = this.currentSize();
var nextClassName = "next_button" + this.options.disabledButtonSuffix;
if (this.nextButton.hasClassName(nextClassName) && lastPosition != size) {
this.nextButton.removeClassName(nextClassName);
this.fire('nextButton:enabled');
}
if (!this.nextButton.hasClassName(nextClassName) && lastPosition == size) {
this.nextButton.addClassName(nextClassName);
this.fire('nextButton:disabled');
}
},
// Group: Size and Position
/*
Method: computeElementSize
Return elements size in pixel, height or width depends on carousel orientation.
Returns:
an integer value
*/
computeElementSize: function() {
return this.elements.first().getDimensions()[this.dimAttribute];
},
/*
Method: currentIndex
Returns current visible index of a carousel.
For example, a horizontal carousel with image #3 on left will return 3 and with half of image #3 will return 3.5
Don't forget that the first image have an index 0
Returns:
a float value
*/
currentIndex: function() {
return - this.currentPosition() / this.elementSize;
},
/*
Method: currentLastPosition
Returns the current position from the end of the last element. This value is in pixel.
Returns:
an integer value, if no images a present it will return 0
*/
currentLastPosition: function() {
if (this.container.childElements().empty())
return 0;
return this.currentPosition() +
this.elements.last().positionedOffset()[this.posAttribute] +
this.elementSize;
},
/*
Method: currentPosition
Returns the current position in pixel.
Tips: To get the position in elements use currentIndex()
Returns:
an integer value
*/
currentPosition: function() {
return this.container.getNumStyle(this.posAttribute);
},
/*
Method: currentSize
Returns the current size of the carousel in pixel
Returns:
Carousel's size in pixel
*/
currentSize: function() {
return this.container.parentNode.getDimensions()[this.dimAttribute];
},
/*
Method: updateSize
Should be called if carousel size has been changed (usually called with a liquid layout)
Returns:
this
*/
updateSize: function() {
this.nbVisible = this.currentSize() / this.elementSize;
var scrollInc = this.options.scrollInc;
if (scrollInc == "auto")
scrollInc = Math.floor(this.nbVisible);
[ this.previousButton, this.nextButton ].each(function(button) {
if (!button) return;
button.stopObserving("click", button.clickHandler);
button.clickHandler = this.scroll.bind(this, (button == this.nextButton ? -1 : 1) * scrollInc * this.elementSize);
button.observe("click", button.clickHandler);
}, this);
this.checkScroll(this.currentPosition(), true);
this.updateButtons().fire('sizeUpdated');
return this;
}
});
/*
Class: UI.Ajax.Carousel
Gives the AJAX power to carousels. An AJAX carousel :
* Use AJAX to add new elements on the fly
Example:
> new UI.Ajax.Carousel("horizontal_carousel",
> {url: "get-more-elements", elementSize: 250});
*/
UI.Ajax.Carousel = Class.create(UI.Carousel, {
// Group: Options
//
// Notice:
// It also include of all carousel's options
options: {
// Property: elementSize
// Required, it define the size of all elements
elementSize : -1,
// Property: url
// Required, it define the URL used by AJAX carousel to request new elements details
url : null
},
/*
Group: Attributes
Notice:
It also include of all carousel's attributes
Property: elementSize
Size of each elements, it's an integer
Property: endIndex
Index of the last loaded element
Property: hasMore
Flag to define if there's still more elements to load
Property: requestRunning
Define whether a request is processing or not
Property: updateHandler
Callback to update carousel, usually used after request success
Property: url
URL used to request additional elements
*/
/*
Group: Events
List of events fired by an AJAX carousel, it also include of all carousel's custom events
Property: request:started
Fired when the request has just started
Property: request:ended
Fired when the request has succeed
*/
// Group: Constructor
/*
Method: initialize
Constructor function, should not be called directly
Parameters:
element - DOM element
options - (Hash) list of optional parameters
Returns:
this
*/
initialize: function($super, element, options) {
if (!options.url)
throw("url option is required for UI.Ajax.Carousel");
if (!options.elementSize)
throw("elementSize option is required for UI.Ajax.Carousel");
$super(element, options);
this.endIndex = 0;
this.hasMore = true;
// Cache handlers
this.updateHandler = this.update.bind(this);
this.updateAndScrollHandler = function(nbElements, transport, json) {
this.update(transport, json);
this.scroll(nbElements);
}.bind(this);
// Run first ajax request to fill the carousel
this.runRequest.bind(this).defer({parameters: {from: 0, to: Math.ceil(this.nbVisible) - 1}, onSuccess: this.updateHandler});
},
// Group: Actions
/*
Method: runRequest
Request the new elements details
Parameters:
options - (Hash) list of optional parameters
Returns:
this
*/
runRequest: function(options) {
this.requestRunning = true;
new Ajax.Request(this.options.url, Object.extend({method: "GET"}, options));
this.fire("request:started");
return this;
},
/*
Method: scroll
Scrolls carousel from maximum deltaPixel
Parameters:
deltaPixel - a float
Returns:
this
*/
scroll: function($super, deltaPixel) {
if (this.animating || this.requestRunning)
return this;
var nbElements = (-deltaPixel) / this.elementSize;
// Check if there is not enough
if (this.hasMore && nbElements > 0 && this.currentIndex() + this.nbVisible + nbElements - 1 > this.endIndex) {
var from = this.endIndex + 1;
var to = Math.ceil(from + this.nbVisible - 1);
this.runRequest({parameters: {from: from, to: to}, onSuccess: this.updateAndScrollHandler.curry(deltaPixel).bind(this)});
return this;
}
else
$super(deltaPixel);
},
/*
Method: update
Update the carousel
Parameters:
transport - XMLHttpRequest object
json - JSON object
Returns:
this
*/
update: function(transport, json) {
this.requestRunning = false;
this.fire("request:ended");
if (!json)
json = transport.responseJSON;
this.hasMore = json.more;
this.endIndex = Math.max(this.endIndex, json.to);
this.elements = this.container.insert({bottom: json.html}).childElements();
return this.updateButtons();
},
// Group: Size and Position
/*
Method: computeElementSize
Return elements size in pixel
Returns:
an integer value
*/
computeElementSize: function() {
return this.options.elementSize;
},
/*
Method: updateSize
Should be called if carousel size has been changed (usually called with a liquid layout)
Returns:
this
*/
updateSize: function($super) {
var nbVisible = this.nbVisible;
$super();
// If we have enough space for at least a new element
if (Math.floor(this.nbVisible) - Math.floor(nbVisible) >= 1 && this.hasMore) {
if (this.currentIndex() + Math.floor(this.nbVisible) >= this.endIndex) {
var nbNew = Math.floor(this.currentIndex() + Math.floor(this.nbVisible) - this.endIndex);
this.runRequest({parameters: {from: this.endIndex + 1, to: this.endIndex + nbNew}, onSuccess: this.updateHandler});
}
}
return this;
},
updateNextButton: function($super) {
var lastPosition = this.currentLastPosition();
var size = this.currentSize();
var nextClassName = "next_button" + this.options.disabledButtonSuffix;
if (this.nextButton.hasClassName(nextClassName) && lastPosition != size) {
this.nextButton.removeClassName(nextClassName);
this.fire('nextButton:enabled');
}
if (!this.nextButton.hasClassName(nextClassName) && lastPosition == size && !this.hasMore) {
this.nextButton.addClassName(nextClassName);
this.fire('nextButton:disabled');
}
}
}); |
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