// jQuery Plugin A Part Hide
// A plugin to hide part of a long list
// Version 0.2 - 28. 5. 2011
// by Fredi Bach

(function($) {

    $.aPartHide = function(element, options) {

        var defaults = {
            showHTML: '<img class="point_img" src="/img/menu_plus.gif" alt="メニューを開く" title="メニューを開く" />',
			hideHTML: '<img class="point_img" src="/img/menu_minus.gif" alt="メニューを閉じる" title="メニューを閉じる" />',
			hidingTriggerLength: 1,
			hideToLength: 1,
			listElement: 'ul',
			listItems: 'li',
			listControlElement: '.showhide',
			showSpeed: 'fast',
			hideSpeed: 'fast',
			controlElementShowClass: 'showHTML',
			controlElementHideClass: 'hideHTML',
            onHide: function() {},
			onShow: function() {}
        }

        var plugin = this;

        plugin.settings = {}

        var $element = $(element),
             element = element;

        plugin.init = function() {
            plugin.settings = $.extend({}, defaults, options);
            
			if ($element.find(plugin.settings.listElement+" "+plugin.settings.listItems).length > plugin.settings.hidingTriggerLength) {
				plugin.hideElements();
				$element.find('.'+plugin.settings.controlElementShowClass).live('click',function() {
	         		plugin.showElements();
				});
				$element.find('.'+plugin.settings.controlElementHideClass).live('click',function() {
	         		plugin.hideElements();
				});
			} else {
				$element.find(plugin.settings.listControlElement).hide();
			}
        }

        plugin.hideElements = function() {
            $element.find(plugin.settings.listElement+" "+plugin.settings.listItems+":gt("+(plugin.settings.hideToLength-1)+")")
					.slideUp(plugin.settings.hideSpeed);
            $element.find(plugin.settings.listControlElement)
					.html(plugin.settings.showHTML)
					.addClass(plugin.settings.controlElementShowClass)
					.removeClass(plugin.settings.controlElementHideClass);
			plugin.settings.onHide();
        }

		plugin.showElements = function() {
            $element.find(plugin.settings.listElement+" "+plugin.settings.listItems)
					.slideDown(plugin.settings.showSpeed);
            $element.find(plugin.settings.listControlElement)
					.html(plugin.settings.hideHTML)
					.addClass(plugin.settings.controlElementHideClass)
					.removeClass(plugin.settings.controlElementShowClass);
			plugin.settings.onShow();
        }

        plugin.init();

    }

    $.fn.aPartHide = function(options) {

        return this.each(function() {
            if (undefined == $(this).data('aPartHide')) {
                var plugin = new $.aPartHide(this, options);
                $(this).data('aPartHide', plugin);
            }
        });

    }

})(jQuery);