Team:OUC-China/js/jquery.oucext.js

/*

EASYDROPDOWN - A Drop-down Builder for Styleable Inputs and Menus
Version: 2.1.4
License: Creative Commons Attribution 3.0 Unported - CC BY 3.0
http://creativecommons.org/licenses/by/3.0/
This software may be used freely on commercial and non-commercial projects with attribution to the author/copyright holder.
Author: Patrick Kunka
Copyright 2013 Patrick Kunka, All Rights Reserved
/

(function($){

function EasyDropDown(){ this.isField = true, this.down = false, this.inFocus = false, this.disabled = false, this.cutOff = false, this.hasLabel = false, this.keyboardMode = false, this.nativeTouch = true, this.wrapperClass = 'dropdown', this.onChange = null; };

EasyDropDown.prototype = { constructor: EasyDropDown, instances: {}, init: function(domNode, settings){ var self = this;

$.extend(self, settings); self.$select = $(domNode); self.id = domNode.id; self.options = []; self.$options = self.$select.find('option'); self.isTouch = 'ontouchend' in document; self.$select.removeClass(self.wrapperClass+' dropdown'); if(self.$select.is(':disabled')){ self.disabled = true; }; if(self.$options.length){ self.$options.each(function(i){ var $option = $(this); if($option.is(':selected')){ self.selected = { index: i, title: $option.text() } self.focusIndex = i; }; if($option.hasClass('label') && i == 0){ self.hasLabel = true; self.label = $option.text(); $option.attr('value',); } else { self.options.push({ domNode: $option[0], title: $option.text(), value: $option.val(), selected: $option.is(':selected') }); }; }); if(!self.selected){ self.selected = { index: 0, title: self.$options.eq(0).text() } self.focusIndex = 0; }; self.render(); }; },

render: function(){ var self = this, touchClass = self.isTouch && self.nativeTouch ? ' touch' : , disabledClass = self.disabled ? ' disabled' : ;

self.$container = self.$select.wrap('

').parent().parent();

self.$active = $(''+self.selected.title+'').appendTo(self.$container); self.$carat = $('<span class="carat"/>').appendTo(self.$container);

self.$scrollWrapper = $('

<ul/>

').appendTo(self.$container);

self.$dropDown = self.$scrollWrapper.find('ul'); self.$form = self.$container.closest('form'); $.each(self.options, function(){ var option = this, active = option.selected ? ' class="active"':; self.$dropDown.append('<li'+active+'>'+option.title+'</li>'); }); self.$items = self.$dropDown.find('li');

if(self.cutOff && self.$items.length > self.cutOff)self.$container.addClass('scrollable');

self.getMaxHeight();

if(self.isTouch && self.nativeTouch){ self.bindTouchHandlers(); } else { self.bindHandlers(); }; },

getMaxHeight: function(){ var self = this;

self.maxHeight = 0;

for(i = 0; i < self.$items.length; i++){ var $item = self.$items.eq(i); self.maxHeight += $item.outerHeight(); if(self.cutOff == i+1){ break; }; }; },

bindTouchHandlers: function(){ var self = this; self.$container.on('click.easyDropDown',function(){ self.$select.focus(); }); self.$select.on({ change: function(){ var $selected = $(this).find('option:selected'), title = $selected.text(), value = $selected.val();

self.$active.text(title); if(typeof self.onChange === 'function'){ self.onChange.call(self.$select[0],{ title: title, value: value }); }; }, focus: function(){ self.$container.addClass('focus'); }, blur: function(){ self.$container.removeClass('focus'); } }); },

bindHandlers: function(){ var self = this; self.query = ; self.$container.on({ 'click.easyDropDown': function(){ if(!self.down && !self.disabled){ self.open(); } else { self.close(); }; }, 'mousemove.easyDropDown': function(){ if(self.keyboardMode){ self.keyboardMode = false; }; } });

$('body').on('click.easyDropDown.'+self.id,function(e){ var $target = $(e.target), classNames = self.wrapperClass.split(' ').join('.');

if(!$target.closest('.'+classNames).length && self.down){ self.close(); }; });

self.$items.on({ 'click.easyDropDown': function(){ var index = $(this).index(); self.select(index); self.$select.focus(); }, 'mouseover.easyDropDown': function(){ if(!self.keyboardMode){ var $t = $(this); $t.addClass('focus').siblings().removeClass('focus'); self.focusIndex = $t.index(); }; }, 'mouseout.easyDropDown': function(){ if(!self.keyboardMode){ $(this).removeClass('focus'); }; } });

self.$select.on({ 'focus.easyDropDown': function(){ self.$container.addClass('focus'); self.inFocus = true; }, 'blur.easyDropDown': function(){ self.$container.removeClass('focus'); self.inFocus = false; }, 'keydown.easyDropDown': function(e){ if(self.inFocus){ self.keyboardMode = true; var key = e.keyCode;

if(key == 38 || key == 40 || key == 32){ e.preventDefault(); if(key == 38){ self.focusIndex-- self.focusIndex = self.focusIndex < 0 ? self.$items.length - 1 : self.focusIndex; } else if(key == 40){ self.focusIndex++ self.focusIndex = self.focusIndex > self.$items.length - 1 ? 0 : self.focusIndex; }; if(!self.down){ self.open(); }; self.$items.removeClass('focus').eq(self.focusIndex).addClass('focus'); if(self.cutOff){ self.scrollToView(); }; self.query = ; }; if(self.down){ if(key == 9 || key == 27){ self.close(); } else if(key == 13){ e.preventDefault(); self.select(self.focusIndex); self.close(); return false; } else if(key == 8){ e.preventDefault(); self.query = self.query.slice(0,-1); self.search(); clearTimeout(self.resetQuery); return false; } else if(key != 38 && key != 40){ var letter = String.fromCharCode(key); self.query += letter; self.search(); clearTimeout(self.resetQuery); }; }; }; }, 'keyup.easyDropDown': function(){ self.resetQuery = setTimeout(function(){ self.query = ; },1200); } });

self.$dropDown.on('scroll.easyDropDown',function(e){ if(self.$dropDown[0].scrollTop >= self.$dropDown[0].scrollHeight - self.maxHeight){ self.$container.addClass('bottom'); } else { self.$container.removeClass('bottom'); }; });

if(self.$form.length){ self.$form.on('reset.easyDropDown', function(){ var active = self.hasLabel ? self.label : self.options[0].title; self.$active.text(active); }); }; },

unbindHandlers: function(){ var self = this;

self.$container .add(self.$select) .add(self.$items) .add(self.$form) .add(self.$dropDown) .off('.easyDropDown'); $('body').off('.'+self.id); },

open: function(){ var self = this, scrollTop = window.scrollY || document.documentElement.scrollTop, scrollLeft = window.scrollX || document.documentElement.scrollLeft, scrollOffset = self.notInViewport(scrollTop);

self.closeAll(); self.getMaxHeight(); self.$select.focus(); window.scrollTo(scrollLeft, scrollTop+scrollOffset); self.$container.addClass('open'); self.$scrollWrapper.css('height',self.maxHeight+'px'); self.down = true; },

close: function(){ var self = this; self.$container.removeClass('open'); self.$scrollWrapper.css('height','0px'); self.focusIndex = self.selected.index; self.query = ; self.down = false; },

closeAll: function(){ var self = this, instances = Object.getPrototypeOf(self).instances; for(var key in instances){ var instance = instances[key]; instance.close(); }; },

select: function(index){ var self = this;

if(typeof index === 'string'){ index = self.$select.find('option[value='+index+']').index() - 1; };

var option = self.options[index], selectIndex = self.hasLabel ? index + 1 : index; self.$items.removeClass('active').eq(index).addClass('active'); self.$active.text(option.title); self.$select .find('option') .removeAttr('selected') .eq(selectIndex) .prop('selected',true) .parent() .trigger('change');

self.selected = { index: index, title: option.title }; self.focusIndex = i; if(typeof self.onChange === 'function'){ self.onChange.call(self.$select[0],{ title: option.title, value: option.value }); }; },

search: function(){ var self = this, lock = function(i){ self.focusIndex = i; self.$items.removeClass('focus').eq(self.focusIndex).addClass('focus'); self.scrollToView(); }, getTitle = function(i){ return self.options[i].title.toUpperCase(); };

for(i = 0; i < self.options.length; i++){ var title = getTitle(i); if(title.indexOf(self.query) == 0){ lock(i); return; }; };

for(i = 0; i < self.options.length; i++){ var title = getTitle(i); if(title.indexOf(self.query) > -1){ lock(i); break; }; }; },

scrollToView: function(){ var self = this; if(self.focusIndex >= self.cutOff){ var $focusItem = self.$items.eq(self.focusIndex), scroll = ($focusItem.outerHeight() * (self.focusIndex + 1)) - self.maxHeight;

self.$dropDown.scrollTop(scroll); }; },

notInViewport: function(scrollTop){ var self = this, range = { min: scrollTop, max: scrollTop + (window.innerHeight || document.documentElement.clientHeight) }, menuBottom = self.$dropDown.offset().top + self.maxHeight;

if(menuBottom >= range.min && menuBottom <= range.max){ return 0; } else { return (menuBottom - range.max) + 5; }; },

destroy: function(){ var self = this; self.unbindHandlers(); self.$select.unwrap().siblings().remove(); self.$select.unwrap(); delete Object.getPrototypeOf(self).instances[self.$select[0].id]; },

disable: function(){ var self = this; self.disabled = true; self.$container.addClass('disabled'); self.$select.attr('disabled',true); if(!self.down)self.close(); },

enable: function(){ var self = this; self.disabled = false; self.$container.removeClass('disabled'); self.$select.attr('disabled',false); } };

$.fn.easyDropDown = function(){ var args = arguments, dataReturn = [], eachReturn;

eachReturn = this.each(function(){ if(args && typeof args[0] === 'string'){ var data = EasyDropDown.prototype.instances[this.id][args[0]](args[1], args[2]); if(data)dataReturn.push(data); } else { instantiate(this, args[0]); }; });

if(dataReturn.length){ return dataReturn.length > 1 ? dataReturn : dataReturn[0]; } else { return eachReturn; }; };

$(function(){ if(typeof Object.getPrototypeOf !== 'function'){ if(typeof 'test'.__proto__ === 'object'){ Object.getPrototypeOf = function(object){ return object.__proto__; }; } else { Object.getPrototypeOf = function(object){ return object.constructor.prototype; }; }; };

$('select.dropdown').each(function(){ var json = $(this).attr('data-settings'); settings = json ? $.parseJSON(json) : {}; instantiate(this, settings); }); }); })(jQuery);