/*
* blueimp helper JS
* https://github.com/blueimp/Gallery
*
* Copyright 2013, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* https://opensource.org/licenses/MIT
*/
/* global define, window, document */
;(function () {
'use strict'
function extend (obj1, obj2) {
var prop
for (prop in obj2) {
if (obj2.hasOwnProperty(prop)) {
obj1[prop] = obj2[prop]
}
}
return obj1
}
function Helper (query) {
if (!this || this.find !== Helper.prototype.find) {
// Called as function instead of as constructor,
// so we simply return a new instance:
return new Helper(query)
}
this.length = 0
if (query) {
if (typeof query === 'string') {
query = this.find(query)
}
if (query.nodeType || query === query.window) {
// Single HTML element
this.length = 1
this[0] = query
} else {
// HTML element collection
var i = query.length
this.length = i
while (i) {
i -= 1
this[i] = query[i]
}
}
}
}
Helper.extend = extend
Helper.contains = function (container, element) {
do {
element = element.parentNode
if (element === container) {
return true
}
} while (element)
return false
}
Helper.parseJSON = function (string) {
return window.JSON && JSON.parse(string)
}
extend(Helper.prototype, {
find: function (query) {
var container = this[0] || document
if (typeof query === 'string') {
if (container.querySelectorAll) {
query = container.querySelectorAll(query)
} else if (query.charAt(0) === '#') {
query = container.getElementById(query.slice(1))
} else {
query = container.getElementsByTagName(query)
}
}
return new Helper(query)
},
hasClass: function (className) {
if (!this[0]) {
return false
}
return new RegExp('(^|\\s+)' + className + '(\\s+|$)').test(
this[0].className
)
},
addClass: function (className) {
var i = this.length
var element
while (i) {
i -= 1
element = this[i]
if (!element.className) {
element.className = className
return this
}
if (this.hasClass(className)) {
return this
}
element.className += ' ' + className
}
return this
},
removeClass: function (className) {
var regexp = new RegExp('(^|\\s+)' + className + '(\\s+|$)')
var i = this.length
var element
while (i) {
i -= 1
element = this[i]
element.className = element.className.replace(regexp, ' ')
}
return this
},
on: function (eventName, handler) {
var eventNames = eventName.split(/\s+/)
var i
var element
while (eventNames.length) {
eventName = eventNames.shift()
i = this.length
while (i) {
i -= 1
element = this[i]
if (element.addEventListener) {
element.addEventListener(eventName, handler, false)
} else if (element.attachEvent) {
element.attachEvent('on' + eventName, handler)
}
}
}
return this
},
off: function (eventName, handler) {
var eventNames = eventName.split(/\s+/)
var i
var element
while (eventNames.length) {
eventName = eventNames.shift()
i = this.length
while (i) {
i -= 1
element = this[i]
if (element.removeEventListener) {
element.removeEventListener(eventName, handler, false)
} else if (element.detachEvent) {
element.detachEvent('on' + eventName, handler)
}
}
}
return this
},
empty: function () {
var i = this.length
var element
while (i) {
i -= 1
element = this[i]
while (element.hasChildNodes()) {
element.removeChild(element.lastChild)
}
}
return this
},
first: function () {
return new Helper(this[0])
}
})
if (typeof define === 'function' && define.amd) {
define(function () {
return Helper
})
} else {
window.blueimp = window.blueimp || {}
window.blueimp.helper = Helper
}
})()
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