/* ========================================================================
 * Bootstrap: collapse.js v3.0.0
 * http://twbs.github.com/bootstrap/javascript.html#collapse
 * 
 * ZUI: The file has been changed in ZUI. It will not keep update with the
 * Bootsrap version in the future.
 * http://zui.sexy
 * ========================================================================
 * Copyright 2012 Twitter, Inc.
 *
 * 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($) {
    'use strict';

    var zuiname = 'zui.collapse'

    // COLLAPSE PUBLIC CLASS DEFINITION
    // ================================

    var Collapse = function(element, options) {
        this.$element = $(element)
        this.options = $.extend({}, Collapse.DEFAULTS, options)
        this.transitioning = null

        if(this.options.parent) this.$parent = $(this.options.parent)
        if(this.options.toggle) this.toggle()
    }

    Collapse.DEFAULTS = {
        toggle: true
    }

    Collapse.prototype.dimension = function() {
        var hasWidth = this.$element.hasClass('width')
        return hasWidth ? 'width' : 'height'
    }

    Collapse.prototype.show = function() {
        if(this.transitioning || this.$element.hasClass('in')) return

        var startEvent = $.Event('show.' + zuiname)
        this.$element.trigger(startEvent)
        if(startEvent.isDefaultPrevented()) return

        var actives = this.$parent && this.$parent.find('.in')

        if(actives && actives.length) {
            var hasData = actives.data(zuiname)
            if(hasData && hasData.transitioning) return
            actives.collapse('hide')
            hasData || actives.data(zuiname, null)
        }

        var dimension = this.dimension()

        this.$element
            .removeClass('collapse')
            .addClass('collapsing')[dimension](0)

        this.transitioning = 1

        var complete = function() {
            this.$element
                .removeClass('collapsing')
                .addClass('in')[dimension]('auto')
            this.transitioning = 0
            this.$element.trigger('shown.' + zuiname)
        }

        if(!$.support.transition) return complete.call(this)

        var scrollSize = $.camelCase(['scroll', dimension].join('-'))

        this.$element
            .one($.support.transition.end, $.proxy(complete, this))
            .emulateTransitionEnd(350)[dimension](this.$element[0][scrollSize])
    }

    Collapse.prototype.hide = function() {
        if(this.transitioning || !this.$element.hasClass('in')) return

        var startEvent = $.Event('hide.' + zuiname)
        this.$element.trigger(startEvent)
        if(startEvent.isDefaultPrevented()) return

        var dimension = this.dimension()

        this.$element[dimension](this.$element[dimension]())[0].offsetHeight

        this.$element
            .addClass('collapsing')
            .removeClass('collapse')
            .removeClass('in')

        this.transitioning = 1

        var complete = function() {
            this.transitioning = 0
            this.$element
                .trigger('hidden.' + zuiname)
                .removeClass('collapsing')
                .addClass('collapse')
        }

        if(!$.support.transition) return complete.call(this)

        this.$element[dimension](0)
            .one($.support.transition.end, $.proxy(complete, this))
            .emulateTransitionEnd(350)
    }

    Collapse.prototype.toggle = function() {
        this[this.$element.hasClass('in') ? 'hide' : 'show']()
    }


    // COLLAPSE PLUGIN DEFINITION
    // ==========================

    var old = $.fn.collapse

    $.fn.collapse = function(option) {
        return this.each(function() {
            var $this = $(this)
            var data = $this.data(zuiname)
            var options = $.extend({}, Collapse.DEFAULTS, $this.data(), typeof option == 'object' && option)

            if(!data) $this.data(zuiname, (data = new Collapse(this, options)))
            if(typeof option == 'string') data[option]()
        })
    }

    $.fn.collapse.Constructor = Collapse


    // COLLAPSE NO CONFLICT
    // ====================

    $.fn.collapse.noConflict = function() {
        $.fn.collapse = old
        return this
    }


    // COLLAPSE DATA-API
    // =================

    $(document).on('click.' + zuiname + '.data-api', '[data-toggle=collapse]', function(e) {
        var $this = $(this),
            href
        var target = $this.attr('data-target') || e.preventDefault() || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '') //strip for ie7
        var $target = $(target)
        var data = $target.data(zuiname)
        var option = data ? 'toggle' : $this.data()
        var parent = $this.attr('data-parent')
        var $parent = parent && $(parent)

        if(!data || !data.transitioning) {
            if($parent) $parent.find('[data-toggle=collapse][data-parent="' + parent + '"]').not($this).addClass('collapsed')
            $this[$target.hasClass('in') ? 'addClass' : 'removeClass']('collapsed')
        }

        $target.collapse(option)
    })

}(window.jQuery);

