/* =============================================================
* bootstrap-typeahead.js v2.0.0
* http://twitter.github.com/bootstrap/javascript.html#typeahead
* =============================================================
* 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 Typeahead = function ( element, options ) {
this.$element = $(element)
this.options = $.extend({}, $.fn.typeahead.defaults, options)
this.matcher = this.options.matcher || this.matcher
this.sorter = this.options.sorter || this.sorter
this.highlighter = this.options.highlighter || this.highlighter
this.$menu = $(this.options.menu).appendTo('body')
this.source = this.options.source
this.onselect = this.options.onselect
this.strings = true
this.shown = false
this.listen()
}
 
Typeahead.prototype = {
 
constructor: Typeahead
 
, select: function () {
var val = JSON.parse(this.$menu.find('.active').attr('data-value'))
, text
 
if (!this.strings) text = val[this.options.property]
else text = val
 
this.$element.val(text)
 
if (typeof this.onselect == "function")
this.onselect(val)
 
return this.hide()
}
 
, show: function () {
var pos = $.extend({}, this.$element.offset(), {
height: this.$element[0].offsetHeight
})
 
this.$menu.css({
top: pos.top + pos.height
, left: pos.left
})
 
this.$menu.show()
this.shown = true
return this
}
 
, hide: function () {
this.$menu.hide()
this.shown = false
return this
}
 
, lookup: function (event) {
var that = this
, items
, q
, value
 
this.query = this.$element.val()
 
if (typeof this.source == "function")
value = this.source(this, this.query)
if (value)
this.process(value)
else
this.process(this.source)
}
 
, process: function (results) {
var that = this
, items
, q
 
if (results.length && typeof results[0] != "string")
this.strings = false
 
this.query = this.$element.val()
 
if (!this.query) {
return this.shown ? this.hide() : this
}
 
items = $.grep(results, function (item) {
if (!that.strings)
item = item[that.options.property]
if (that.matcher(item)) return item
})
 
items = this.sorter(items)
 
if (!items.length) {
return this.shown ? this.hide() : this
}
 
return this.render(items.slice(0, this.options.items)).show()
}
 
, matcher: function (item) {
return ~item.toLowerCase().indexOf(this.query.toLowerCase())
}
 
, sorter: function (items) {
var beginswith = []
, caseSensitive = []
, caseInsensitive = []
, item
, sortby
 
while (item = items.shift()) {
if (this.strings) sortby = item
else sortby = item[this.options.property]
 
if (!sortby.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item)
else if (~sortby.indexOf(this.query)) caseSensitive.push(item)
else caseInsensitive.push(item)
}
 
return beginswith.concat(caseSensitive, caseInsensitive)
}
 
, highlighter: function (item) {
return item.replace(new RegExp('(' + this.query + ')', 'ig'), function ($1, match) {
return '<strong>' + match + '</strong>'
})
}
 
, render: function (items) {
var that = this
 
items = $(items).map(function (i, item) {
i = $(that.options.item).attr('data-value', JSON.stringify(item))
if (!that.strings)
item = item[that.options.property]
i.find('a').html(that.highlighter(item))
return i[0]
})
 
items.first().addClass('active')
this.$menu.html(items)
return this
}
 
, next: function (event) {
var active = this.$menu.find('.active').removeClass('active')
, next = active.next()
 
if (!next.length) {
next = $(this.$menu.find('li')[0])
}
 
next.addClass('active')
}
 
, prev: function (event) {
var active = this.$menu.find('.active').removeClass('active')
, prev = active.prev()
 
if (!prev.length) {
prev = this.$menu.find('li').last()
}
 
prev.addClass('active')
}
 
, listen: function () {
this.$element
.on('blur', $.proxy(this.blur, this))
.on('keypress', $.proxy(this.keypress, this))
.on('keyup', $.proxy(this.keyup, this))
 
if ($.browser.webkit || $.browser.msie) {
this.$element.on('keydown', $.proxy(this.keypress, this))
}
 
this.$menu
.on('click', $.proxy(this.click, this))
.on('mouseenter', 'li', $.proxy(this.mouseenter, this))
}
 
, keyup: function (e) {
e.stopPropagation()
e.preventDefault()
 
switch(e.keyCode) {
case 40: // down arrow
case 38: // up arrow
break
 
case 9: // tab
case 13: // enter
if (!this.shown) return
this.select()
break
 
case 27: // escape
this.hide()
break
 
default:
this.lookup()
}
 
}
 
, keypress: function (e) {
e.stopPropagation()
if (!this.shown) return
 
switch(e.keyCode) {
case 9: // tab
case 13: // enter
case 27: // escape
e.preventDefault()
break
 
case 38: // up arrow
e.preventDefault()
this.prev()
break
 
case 40: // down arrow
e.preventDefault()
this.next()
break
}
}
 
, blur: function (e) {
var that = this
e.stopPropagation()
e.preventDefault()
setTimeout(function () { that.hide() }, 150)
}
 
, click: function (e) {
e.stopPropagation()
e.preventDefault()
this.select()
}
 
, mouseenter: function (e) {
this.$menu.find('.active').removeClass('active')
$(e.currentTarget).addClass('active')
}
 
}
 
 
/* TYPEAHEAD PLUGIN DEFINITION
* =========================== */
 
$.fn.typeahead = function ( option ) {
return this.each(function () {
var $this = $(this)
, data = $this.data('typeahead')
, options = typeof option == 'object' && option
if (!data) $this.data('typeahead', (data = new Typeahead(this, options)))
if (typeof option == 'string') data[option]()
})
}
 
$.fn.typeahead.defaults = {
source: []
, items: 8
, menu: '<ul class="typeahead dropdown-menu"></ul>'
, item: '<li><a href="#"></a></li>'
, onselect: null
, property: 'value'
}
 
$.fn.typeahead.Constructor = Typeahead
 
 
/* TYPEAHEAD DATA-API
* ================== */
 
$(function () {
$('body').on('focus.typeahead.data-api', '[data-provide="typeahead"]', function (e) {
var $this = $(this)
if ($this.data('typeahead')) return
e.preventDefault()
$this.typeahead($this.data())
})
})
 
}( window.jQuery );