/*
 * jQuery UI Accordion
 * 
 * Copyright (c) 2007, 2008 Jörn Zaefferer
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Accordion
 *
 * Depends:
 *	ui.core.js
 */
(function($) {
$.widget("ui.accordion", {
init: function() {
var options = this.options;
if ( options.navigation ) {
var current = this.element.find("a").filter(options.navigationFilter);
if ( current.length ) {
if ( current.filter(options.header).length ) {
options.active = current;
} else {
options.active = current.parent().parent().prev();
current.addClass("current");
}
}
}
// calculate active if not specified, using the first header
options.headers = this.element.find(options.header);
options.active = findActive(options.headers, options.active);
// IE7-/Win - Extra vertical space in Lists fixed
if ($.browser.msie) {
this.element.find('a').css('zoom', '1');
}
if (!this.element.hasClass("ui-accordion")) {
this.element.addClass("ui-accordion");
$("<span class='ui-accordion-left'/>").insertBefore(options.headers);
$("<span class='ui-accordion-right'/>").appendTo(options.headers);
options.headers.addClass("ui-accordion-header").attr("tabindex", "0");
}
var maxHeight;
if ( options.fillSpace ) {
maxHeight = this.element.parent().height();
options.headers.each(function() {
maxHeight -= $(this).outerHeight();
});
var maxPadding = 0;
options.headers.next().each(function() {
maxPadding = Math.max(maxPadding, $(this).innerHeight() - $(this).height());
}).height(maxHeight - maxPadding);
} else if ( options.autoHeight ) {
maxHeight = 0;
options.headers.next().each(function() {
maxHeight = Math.max(maxHeight, $(this).outerHeight());
}).height(maxHeight);
}
options.headers
.not(options.active || "")
.next()
.hide();
options.active.parent().andSelf().addClass(options.selectedClass);
if (options.event) {
this.element.bind((options.event) + ".accordion", clickHandler);
}
},
activate: function(index) {
// call clickHandler with custom event
clickHandler.call(this.element[0], {
target: findActive( this.options.headers, index )[0]
});
},
destroy: function() {
this.options.headers.next().css("display", "");
if ( this.options.fillSpace || this.options.autoHeight ) {
this.options.headers.next().css("height", "");
}
$.removeData(this.element[0], "accordion");
this.element.removeClass("ui-accordion").unbind(".accordion");
}
});
function scopeCallback(callback, scope) {
return function() {
return callback.apply(scope, arguments);
};
};
function completed(cancel) {
// if removed while animated data can be empty
if (!$.data(this, "accordion")) {
return;
}
var instance = $.data(this, "accordion");
var options = instance.options;
options.running = cancel ? 0 : --options.running;
if ( options.running ) {
return;
}
if ( options.clearStyle ) {
options.toShow.add(options.toHide).css({
height: "",
overflow: ""
});
}
$(this).triggerHandler("accordionchange", [$.event.fix({type: 'accordionchange', target: instance.element[0]}), options.data], options.change);
}
function toggle(toShow, toHide, data, clickedActive, down) {
var options = $.data(this, "accordion").options;
options.toShow = toShow;
options.toHide = toHide;
options.data = data;
var complete = scopeCallback(completed, this);
// count elements to animate
options.running = toHide.size() === 0 ? toShow.size() : toHide.size();
if ( options.animated ) {
if ( !options.alwaysOpen && clickedActive ) {
$.ui.accordion.animations[options.animated]({
toShow: jQuery([]),
toHide: toHide,
complete: complete,
down: down,
autoHeight: options.autoHeight
});
} else {
$.ui.accordion.animations[options.animated]({
toShow: toShow,
toHide: toHide,
complete: complete,
down: down,
autoHeight: options.autoHeight
});
}
} else {
if ( !options.alwaysOpen && clickedActive ) {
toShow.toggle();
} else {
toHide.hide();
toShow.show();
}
complete(true);
}
}
function clickHandler(event) {
var options = $.data(this, "accordion").options;
if (options.disabled) {
return false;
}
// called only when using activate(false) to close all parts programmatically
if ( !event.target && !options.alwaysOpen ) {
options.active.parent().andSelf().toggleClass(options.selectedClass);
var toHide = options.active.next(),
data = {
options: options,
newHeader: jQuery([]),
oldHeader: options.active,
newContent: jQuery([]),
oldContent: toHide
},
toShow = (options.active = $([]));
toggle.call(this, toShow, toHide, data );
return false;
}
// get the click target
var clicked = $(event.target);
// due to the event delegation model, we have to check if one
// of the parent elements is our actual header, and find that
// otherwise stick with the initial target
clicked = $( clicked.parents(options.header)[0] || clicked );
var clickedActive = clicked[0] == options.active[0];
// if animations are still active, or the active header is the target, ignore click
if (options.running || (options.alwaysOpen && clickedActive)) {
return false;
}
if (!clicked.is(options.header)) {
return;
}
// switch classes
options.active.parent().andSelf().toggleClass(options.selectedClass);
if ( !clickedActive ) {
clicked.parent().andSelf().addClass(options.selectedClass);
}
// find elements to show and hide
var toShow = clicked.next(),
toHide = options.active.next(),
//data = [clicked, options.active, toShow, toHide],
data = {
options: options,
newHeader: clicked,
oldHeader: options.active,
newContent: toShow,
oldContent: toHide
},
down = options.headers.index( options.active[0] ) > options.headers.index( clicked[0] );
options.active = clickedActive ? $([]) : clicked;
toggle.call(this, toShow, toHide, data, clickedActive, down );
return false;
};
function findActive(headers, selector) {
return selector != undefined
? typeof selector == "number"
? headers.filter(":eq(" + selector + ")")
: headers.not(headers.not(selector))
: selector === false
? $([])
: headers.filter(":eq(0)");
}
$.extend($.ui.accordion, {
defaults: {
selectedClass: "selected",
alwaysOpen: true,
animated: 'slide',
event: "click",
header: "a",
autoHeight: true,
running: 0,
navigationFilter: function() {
return this.href.toLowerCase() == location.href.toLowerCase();
}
},
animations: {
slide: function(options, additions) {
options = $.extend({
easing: "swing",
duration: 300
}, options, additions);
if ( !options.toHide.size() ) {
options.toShow.animate({height: "show"}, options);
return;
}
var hideHeight = options.toHide.height(),
showHeight = options.toShow.height(),
difference = showHeight / hideHeight;
options.toShow.css({ height: 0, overflow: 'hidden' }).show();
options.toHide.filter(":hidden").each(options.complete).end().filter(":visible").animate({height:"hide"},{
step: function(now) {
var current = (hideHeight - now) * difference;
if ($.browser.msie || $.browser.opera) {
current = Math.ceil(current);
}
options.toShow.height( current );
},
duration: options.duration,
easing: options.easing,
complete: function() {
if ( !options.autoHeight ) {
options.toShow.css("height", "auto");
}
options.complete();
}
});
},
bounceslide: function(options) {
this.slide(options, {
easing: options.down ? "bounceout" : "swing",
duration: options.down ? 1000 : 200
});
},
easeslide: function(options) {
this.slide(options, {
easing: "easeinout",
duration: 700
});
}
}
});
// deprecated, use accordion("activate", index) instead
$.fn.activate = function(index) {
return this.accordion("activate", index);
};
})(jQuery);