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* File: iframeResizer.contentWindow.js\n * Desc: Include this file in any page being loaded into an iframe\n *       to force the iframe to resize to the content size.\n * Requires: iframeResizer.js on host page.\n * Doc: https://github.com/davidjbradshaw/iframe-resizer\n * Author: David J. Bradshaw - dave@bradshaw.net\n * Contributor: Jure Mav - jure.mav@gmail.com\n * Contributor: Ian Caunce - ian@hallnet.co.uk\n */\n\n\n;(function(undefined) {\n\t'use strict';\n\n\tif(typeof window === 'undefined') return; // don't run for server side render\n\n\tvar\n\t\tautoResize            = true,\n\t\tbase                  = 10,\n\t\tbodyBackground        = '',\n\t\tbodyMargin            = 0,\n\t\tbodyMarginStr         = '',\n\t\tbodyObserver          = null,\n\t\tbodyPadding           = '',\n\t\tcalculateWidth        = false,\n\t\tdoubleEventList       = {'resize':1,'click':1},\n\t\teventCancelTimer      = 128,\n\t\tfirstRun              = true,\n\t\theight                = 1,\n\t\theightCalcModeDefault = 'bodyOffset',\n\t\theightCalcMode        = heightCalcModeDefault,\n\t\tinitLock              = true,\n\t\tinitMsg               = '',\n\t\tinPageLinks           = {},\n\t\tinterval              = 32,\n\t\tintervalTimer         = null,\n\t\tlogging               = false,\n\t\tmsgID                 = '[iFrameSizer]',  //Must match host page msg ID\n\t\tmsgIdLen              = msgID.length,\n\t\tmyID                  = '',\n\t\tobserver              = null,\n\t\tresetRequiredMethods  = {max:1,min:1,bodyScroll:1,documentElementScroll:1},\n\t\tresizeFrom            = 'child',\n\t\tsendPermit            = true,\n\t\ttarget                = window.parent,\n\t\ttargetOriginDefault   = '*',\n\t\ttolerance             = 0,\n\t\ttriggerLocked         = false,\n\t\ttriggerLockedTimer    = null,\n\t\tthrottledTimer        = 16,\n\t\twidth                 = 1,\n\t\twidthCalcModeDefault  = 'scroll',\n\t\twidthCalcMode         = widthCalcModeDefault,\n\t\twin                   = window,\n\t\tmessageCallback       = function(){ warn('MessageCallback function not defined'); },\n\t\treadyCallback         = function(){},\n\t\tpageInfoCallback      = function(){},\n\t\tcustomCalcMethods     = {\n\t\t\theight: function(){\n\t\t\t\twarn('Custom height calculation function not defined');\n\t\t\t\treturn document.documentElement.offsetHeight;\n\t\t\t},\n\t\t\twidth: function(){\n\t\t\t\twarn('Custom width calculation function not defined');\n\t\t\t\treturn document.body.scrollWidth;\n\t\t\t}\n\t\t},\n\t\teventHandlersByName   = {};\n\n\n\tfunction addEventListener(el,evt,func){\n\t\t/* istanbul ignore else */ // Not testable in phantonJS\n\t\tif ('addEventListener' in window){\n\t\t\tel.addEventListener(evt,func, false);\n\t\t} else if ('attachEvent' in window){ //IE\n\t\t\tel.attachEvent('on'+evt,func);\n\t\t}\n\t}\n\n\tfunction removeEventListener(el,evt,func){\n\t\t/* istanbul ignore else */ // Not testable in phantonJS\n\t\tif ('removeEventListener' in window){\n\t\t\tel.removeEventListener(evt,func, false);\n\t\t} else if ('detachEvent' in window){ //IE\n\t\t\tel.detachEvent('on'+evt,func);\n\t\t}\n\t}\n\n\tfunction capitalizeFirstLetter(string) {\n\t\treturn string.charAt(0).toUpperCase() + string.slice(1);\n\t}\n\n\t//Based on underscore.js\n\tfunction throttle(func) {\n\t\tvar\n\t\t\tcontext, args, result,\n\t\t\ttimeout = null,\n\t\t\tprevious = 0,\n\t\t\tlater = function() {\n\t\t\t\tprevious = getNow();\n\t\t\t\ttimeout = null;\n\t\t\t\tresult = func.apply(context, args);\n\t\t\t\tif (!timeout) {\n\t\t\t\t\tcontext = args = null;\n\t\t\t\t}\n\t\t\t};\n\n\t\treturn function() {\n\t\t\tvar now = getNow();\n\n\t\t\tif (!previous) {\n\t\t\t\tprevious = now;\n\t\t\t}\n\n\t\t\tvar remaining = throttledTimer - (now - previous);\n\n\t\t\tcontext = this;\n\t\t\targs = arguments;\n\n\t\t\tif (remaining <= 0 || remaining > throttledTimer) {\n\t\t\t\tif (timeout) {\n\t\t\t\t\tclearTimeout(timeout);\n\t\t\t\t\ttimeout = null;\n\t\t\t\t}\n\n\t\t\t\tprevious = now;\n\t\t\t\tresult = func.apply(context, args);\n\n\t\t\t\tif (!timeout) {\n\t\t\t\t\tcontext = args = null;\n\t\t\t\t}\n\n\t\t\t} else if (!timeout) {\n\t\t\t\ttimeout = setTimeout(later, remaining);\n\t\t\t}\n\n\t\t\treturn result;\n\t\t};\n\t}\n\n\tvar getNow = Date.now || function() {\n\t\t/* istanbul ignore next */ // Not testable in PhantonJS\n\t\treturn new Date().getTime();\n\t};\n\n\tfunction formatLogMsg(msg){\n\t\treturn msgID + '[' + myID + ']' + ' ' + msg;\n\t}\n\n\tfunction log(msg){\n\t\tif (logging && ('object' === typeof window.console)){\n\t\t\tconsole.log(formatLogMsg(msg));\n\t\t}\n\t}\n\n\tfunction warn(msg){\n\t\tif ('object' === typeof window.console){\n\t\t\tconsole.warn(formatLogMsg(msg));\n\t\t}\n\t}\n\n\n\tfunction init(){\n\t\treadDataFromParent();\n\t\tlog('Initialising iFrame ('+location.href+')');\n\t\treadDataFromPage();\n\t\tsetMargin();\n\t\tsetBodyStyle('background',bodyBackground);\n\t\tsetBodyStyle('padding',bodyPadding);\n\t\tinjectClearFixIntoBodyElement();\n\t\tcheckHeightMode();\n\t\tcheckWidthMode();\n\t\tstopInfiniteResizingOfIFrame();\n\t\tsetupPublicMethods();\n\t\tstartEventListeners();\n\t\tinPageLinks = setupInPageLinks();\n\t\tsendSize('init','Init message from host page');\n\t\treadyCallback();\n\t}\n\n\tfunction readDataFromParent(){\n\n\t\tfunction strBool(str){\n\t\t\treturn 'true' === str ? true : false;\n\t\t}\n\n\t\tvar data = initMsg.substr(msgIdLen).split(':');\n\n\t\tmyID               = data[0];\n\t\tbodyMargin         = (undefined !== data[1]) ? Number(data[1])   : bodyMargin; //For V1 compatibility\n\t\tcalculateWidth     = (undefined !== data[2]) ? strBool(data[2])  : calculateWidth;\n\t\tlogging            = (undefined !== data[3]) ? strBool(data[3])  : logging;\n\t\tinterval           = (undefined !== data[4]) ? Number(data[4])   : interval;\n\t\tautoResize         = (undefined !== data[6]) ? strBool(data[6])  : autoResize;\n\t\tbodyMarginStr      = data[7];\n\t\theightCalcMode     = (undefined !== data[8]) ? data[8]           : heightCalcMode;\n\t\tbodyBackground     = data[9];\n\t\tbodyPadding        = data[10];\n\t\ttolerance          = (undefined !== data[11]) ? Number(data[11]) : tolerance;\n\t\tinPageLinks.enable = (undefined !== data[12]) ? strBool(data[12]): false;\n\t\tresizeFrom         = (undefined !== data[13]) ? data[13]         : resizeFrom;\n\t\twidthCalcMode      = (undefined !== data[14]) ? data[14]         : widthCalcMode;\n\t}\n\n\tfunction readDataFromPage(){\n\t\tfunction readData(){\n\t\t\tvar data = window.iFrameResizer;\n\n\t\t\tlog('Reading data from page: ' + JSON.stringify(data));\n\n\t\t\tmessageCallback     = ('messageCallback'         in data) ? data.messageCallback         : messageCallback;\n\t\t\treadyCallback       = ('readyCallback'           in data) ? data.readyCallback           : readyCallback;\n\t\t\ttargetOriginDefault = ('targetOrigin'            in data) ? data.targetOrigin            : targetOriginDefault;\n\t\t\theightCalcMode      = ('heightCalculationMethod' in data) ? data.heightCalculationMethod : heightCalcMode;\n\t\t\twidthCalcMode       = ('widthCalculationMethod'  in data) ? data.widthCalculationMethod  : widthCalcMode;\n\t\t}\n\n\t\tfunction setupCustomCalcMethods(calcMode, calcFunc){\n\t\t\tif ('function' === typeof calcMode) {\n\t\t\t\tlog('Setup custom ' + calcFunc + 'CalcMethod');\n\t\t\t\tcustomCalcMethods[calcFunc] = calcMode;\n\t\t\t\tcalcMode = 'custom';\n\t\t\t}\n\n\t\t\treturn calcMode;\n\t\t}\n\n\t\tif(('iFrameResizer' in window) && (Object === window.iFrameResizer.constructor)) {\n\t\t\treadData();\n\t\t\theightCalcMode = setupCustomCalcMethods(heightCalcMode, 'height');\n\t\t\twidthCalcMode  = setupCustomCalcMethods(widthCalcMode,  'width');\n\t\t}\n\n\t\tlog('TargetOrigin for parent set to: ' + targetOriginDefault);\n\t}\n\n\n\tfunction chkCSS(attr,value){\n\t\tif (-1 !== value.indexOf('-')){\n\t\t\twarn('Negative CSS value ignored for '+attr);\n\t\t\tvalue='';\n\t\t}\n\t\treturn value;\n\t}\n\n\tfunction setBodyStyle(attr,value){\n\t\tif ((undefined !== value) && ('' !== value) && ('null' !== value)){\n\t\t\tdocument.body.style[attr] = value;\n\t\t\tlog('Body '+attr+' set to \"'+value+'\"');\n\t\t}\n\t}\n\n\tfunction setMargin(){\n\t\t//If called via V1 script, convert bodyMargin from int to str\n\t\tif (undefined === bodyMarginStr){\n\t\t\tbodyMarginStr = bodyMargin+'px';\n\t\t}\n\n\t\tsetBodyStyle('margin',chkCSS('margin',bodyMarginStr));\n\t}\n\n\tfunction stopInfiniteResizingOfIFrame(){\n\t\tdocument.documentElement.style.height = '';\n\t\tdocument.body.style.height = '';\n\t\tlog('HTML & body height set to \"auto\"');\n\t}\n\n\n\tfunction manageTriggerEvent(options){\n\n\t\tvar listener = {\n\t\t\tadd:    function(eventName){\n\t\t\t\tfunction handleEvent(){\n\t\t\t\t\tsendSize(options.eventName,options.eventType);\n\t\t\t\t}\n\n\t\t\t\teventHandlersByName[eventName] = handleEvent;\n\n\t\t\t\taddEventListener(window,eventName,handleEvent);\n\t\t\t},\n\t\t\tremove: function(eventName){\n\t\t\t\tvar handleEvent = eventHandlersByName[eventName];\n\t\t\t\tdelete eventHandlersByName[eventName];\n\n\t\t\t\tremoveEventListener(window,eventName,handleEvent);\n\t\t\t}\n\t\t};\n\n\t\tif(options.eventNames && Array.prototype.map){\n\t\t\toptions.eventName = options.eventNames[0];\n\t\t\toptions.eventNames.map(listener[options.method]);\n\t\t} else {\n\t\t\tlistener[options.method](options.eventName);\n\t\t}\n\n\t\tlog(capitalizeFirstLetter(options.method) + ' event listener: ' + options.eventType);\n\t}\n\n\tfunction manageEventListeners(method){\n\t\tmanageTriggerEvent({method:method, eventType: 'Animation Start',           eventNames: ['animationstart','webkitAnimationStart'] });\n\t\tmanageTriggerEvent({method:method, eventType: 'Animation Iteration',       eventNames: ['animationiteration','webkitAnimationIteration'] });\n\t\tmanageTriggerEvent({method:method, eventType: 'Animation End',             eventNames: ['animationend','webkitAnimationEnd'] });\n\t\tmanageTriggerEvent({method:method, eventType: 'Input',                     eventName:  'input' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Mouse Up',                  eventName:  'mouseup' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Mouse Down',                eventName:  'mousedown' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Orientation Change',        eventName:  'orientationchange' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Print',                     eventName:  ['afterprint', 'beforeprint'] });\n\t\tmanageTriggerEvent({method:method, eventType: 'Ready State Change',        eventName:  'readystatechange' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Touch Start',               eventName:  'touchstart' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Touch End',                 eventName:  'touchend' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Touch Cancel',              eventName:  'touchcancel' });\n\t\tmanageTriggerEvent({method:method, eventType: 'Transition Start',          eventNames: ['transitionstart','webkitTransitionStart','MSTransitionStart','oTransitionStart','otransitionstart'] });\n\t\tmanageTriggerEvent({method:method, eventType: 'Transition Iteration',      eventNames: ['transitioniteration','webkitTransitionIteration','MSTransitionIteration','oTransitionIteration','otransitioniteration'] });\n\t\tmanageTriggerEvent({method:method, eventType: 'Transition End',            eventNames: ['transitionend','webkitTransitionEnd','MSTransitionEnd','oTransitionEnd','otransitionend'] });\n\t\tif('child' === resizeFrom){\n\t\t\tmanageTriggerEvent({method:method, eventType: 'IFrame Resized',        eventName:  'resize' });\n\t\t}\n\t}\n\n\tfunction checkCalcMode(calcMode,calcModeDefault,modes,type){\n\t\tif (calcModeDefault !== calcMode){\n\t\t\tif (!(calcMode in modes)){\n\t\t\t\twarn(calcMode + ' is not a valid option for '+type+'CalculationMethod.');\n\t\t\t\tcalcMode=calcModeDefault;\n\t\t\t}\n\t\t\tlog(type+' calculation method set to \"'+calcMode+'\"');\n\t\t}\n\n\t\treturn calcMode;\n\t}\n\n\tfunction checkHeightMode(){\n\t\theightCalcMode = checkCalcMode(heightCalcMode,heightCalcModeDefault,getHeight,'height');\n\t}\n\n\tfunction checkWidthMode(){\n\t\twidthCalcMode = checkCalcMode(widthCalcMode,widthCalcModeDefault,getWidth,'width');\n\t}\n\n\tfunction startEventListeners(){\n\t\tif ( true === autoResize ) {\n\t\t\tmanageEventListeners('add');\n\t\t\tsetupMutationObserver();\n\t\t}\n\t\telse {\n\t\t\tlog('Auto Resize disabled');\n\t\t}\n\t}\n\n\tfunction stopMsgsToParent(){\n\t\tlog('Disable outgoing messages');\n\t\tsendPermit = false;\n\t}\n\n\tfunction removeMsgListener(){\n\t\tlog('Remove event listener: Message');\n\t\tremoveEventListener(window, 'message', receiver);\n\t}\n\n\tfunction disconnectMutationObserver(){\n\t\tif (null !== bodyObserver){\n\t\t\t/* istanbul ignore next */ // Not testable in PhantonJS\n\t\t\tbodyObserver.disconnect();\n\t\t}\n\t}\n\n\tfunction stopEventListeners(){\n\t\tmanageEventListeners('remove');\n\t\tdisconnectMutationObserver();\n\t\tclearInterval(intervalTimer);\n\t}\n\n\tfunction teardown(){\n\t\tstopMsgsToParent();\n\t\tremoveMsgListener();\n\t\tif (true === autoResize) stopEventListeners();\n\t}\n\n\tfunction injectClearFixIntoBodyElement(){\n\t\tvar clearFix = document.createElement('div');\n\t\tclearFix.style.clear   = 'both';\n\t\tclearFix.style.display = 'block'; //Guard against this having been globally redefined in CSS.\n\t\tdocument.body.appendChild(clearFix);\n\t}\n\n\tfunction setupInPageLinks(){\n\n\t\tfunction getPagePosition (){\n\t\t\treturn {\n\t\t\t\tx: (window.pageXOffset !== undefined) ? window.pageXOffset : document.documentElement.scrollLeft,\n\t\t\t\ty: (window.pageYOffset !== undefined) ? window.pageYOffset : document.documentElement.scrollTop\n\t\t\t};\n\t\t}\n\n\t\tfunction getElementPosition(el){\n\t\t\tvar\n\t\t\t\telPosition   = el.getBoundingClientRect(),\n\t\t\t\tpagePosition = getPagePosition();\n\n\t\t\treturn {\n\t\t\t\tx: parseInt(elPosition.left,10) + parseInt(pagePosition.x,10),\n\t\t\t\ty: parseInt(elPosition.top,10)  + parseInt(pagePosition.y,10)\n\t\t\t};\n\t\t}\n\n\t\tfunction findTarget(location){\n\t\t\tfunction jumpToTarget(target){\n\t\t\t\tvar jumpPosition = getElementPosition(target);\n\n\t\t\t\tlog('Moving to in page link (#'+hash+') at x: '+jumpPosition.x+' y: '+jumpPosition.y);\n\t\t\t\tsendMsg(jumpPosition.y, jumpPosition.x, 'scrollToOffset'); // X&Y reversed at sendMsg uses height/width\n\t\t\t}\n\n\t\t\tvar\n\t\t\t\thash     = location.split('#')[1] || location, //Remove # if present\n\t\t\t\thashData = decodeURIComponent(hash),\n\t\t\t\ttarget   = document.getElementById(hashData) || document.getElementsByName(hashData)[0];\n\n\t\t\tif (undefined !== target){\n\t\t\t\tjumpToTarget(target);\n\t\t\t} else {\n\t\t\t\tlog('In page link (#' + hash + ') not found in iFrame, so sending to parent');\n\t\t\t\tsendMsg(0,0,'inPageLink','#'+hash);\n\t\t\t}\n\t\t}\n\n\t\tfunction checkLocationHash(){\n\t\t\tif ('' !== location.hash && '#' !== location.hash){\n\t\t\t\tfindTarget(location.href);\n\t\t\t}\n\t\t}\n\n\t\tfunction bindAnchors(){\n\t\t\tfunction setupLink(el){\n\t\t\t\tfunction linkClicked(e){\n\t\t\t\t\te.preventDefault();\n\n\t\t\t\t\t/*jshint validthis:true */\n\t\t\t\t\tfindTarget(this.getAttribute('href'));\n\t\t\t\t}\n\n\t\t\t\tif ('#' !== el.getAttribute('href')){\n\t\t\t\t\taddEventListener(el,'click',linkClicked);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tArray.prototype.forEach.call( document.querySelectorAll( 'a[href^=\"#\"]' ), setupLink );\n\t\t}\n\n\t\tfunction bindLocationHash(){\n\t\t\taddEventListener(window,'hashchange',checkLocationHash);\n\t\t}\n\n\t\tfunction initCheck(){ //check if page loaded with location hash after init resize\n\t\t\tsetTimeout(checkLocationHash,eventCancelTimer);\n\t\t}\n\n\t\tfunction enableInPageLinks(){\n\t\t\t/* istanbul ignore else */ // Not testable in phantonJS\n\t\t\tif(Array.prototype.forEach && document.querySelectorAll){\n\t\t\t\tlog('Setting up location.hash handlers');\n\t\t\t\tbindAnchors();\n\t\t\t\tbindLocationHash();\n\t\t\t\tinitCheck();\n\t\t\t} else {\n\t\t\t\twarn('In page linking not fully supported in this browser! (See README.md for IE8 workaround)');\n\t\t\t}\n\t\t}\n\n\t\tif(inPageLinks.enable){\n\t\t\tenableInPageLinks();\n\t\t} else {\n\t\t\tlog('In page linking not enabled');\n\t\t}\n\n\t\treturn {\n\t\t\tfindTarget:findTarget\n\t\t};\n\t}\n\n\tfunction setupPublicMethods(){\n\t\tlog('Enable public methods');\n\n\t\twin.parentIFrame = {\n\n\t\t\tautoResize: function autoResizeF(resize){\n\t\t\t\tif (true === resize && false === autoResize) {\n\t\t\t\t\tautoResize=true;\n\t\t\t\t\tstartEventListeners();\n\t\t\t\t\t//sendSize('autoResize','Auto Resize enabled');\n\t\t\t\t} else if (false === resize && true === autoResize) {\n\t\t\t\t\tautoResize=false;\n\t\t\t\t\tstopEventListeners();\n\t\t\t\t}\n\n\t\t\t\treturn autoResize;\n\t\t\t},\n\n\t\t\tclose: function closeF(){\n\t\t\t\tsendMsg(0,0,'close');\n\t\t\t\tteardown();\n\t\t\t},\n\n\t\t\tgetId: function getIdF(){\n\t\t\t\treturn myID;\n\t\t\t},\n\n\t\t\tgetPageInfo: function getPageInfoF(callback){\n\t\t\t\tif ('function' === typeof callback){\n\t\t\t\t\tpageInfoCallback = callback;\n\t\t\t\t\tsendMsg(0,0,'pageInfo');\n\t\t\t\t} else {\n\t\t\t\t\tpageInfoCallback = function(){};\n\t\t\t\t\tsendMsg(0,0,'pageInfoStop');\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tmoveToAnchor: function moveToAnchorF(hash){\n\t\t\t\tinPageLinks.findTarget(hash);\n\t\t\t},\n\n\t\t\treset: function resetF(){\n\t\t\t\tresetIFrame('parentIFrame.reset');\n\t\t\t},\n\n\t\t\tscrollTo: function scrollToF(x,y){\n\t\t\t\tsendMsg(y,x,'scrollTo'); // X&Y reversed at sendMsg uses height/width\n\t\t\t},\n\n\t\t\tscrollToOffset: function scrollToF(x,y){\n\t\t\t\tsendMsg(y,x,'scrollToOffset'); // X&Y reversed at sendMsg uses height/width\n\t\t\t},\n\n\t\t\tsendMessage: function sendMessageF(msg,targetOrigin){\n\t\t\t\tsendMsg(0,0,'message',JSON.stringify(msg),targetOrigin);\n\t\t\t},\n\n\t\t\tsetHeightCalculationMethod: function setHeightCalculationMethodF(heightCalculationMethod){\n\t\t\t\theightCalcMode = heightCalculationMethod;\n\t\t\t\tcheckHeightMode();\n\t\t\t},\n\n\t\t\tsetWidthCalculationMethod: function setWidthCalculationMethodF(widthCalculationMethod){\n\t\t\t\twidthCalcMode = widthCalculationMethod;\n\t\t\t\tcheckWidthMode();\n\t\t\t},\n\n\t\t\tsetTargetOrigin: function setTargetOriginF(targetOrigin){\n\t\t\t\tlog('Set targetOrigin: '+targetOrigin);\n\t\t\t\ttargetOriginDefault = targetOrigin;\n\t\t\t},\n\n\t\t\tsize: function sizeF(customHeight, customWidth){\n\t\t\t\tvar valString = ''+(customHeight?customHeight:'')+(customWidth?','+customWidth:'');\n\t\t\t\t//lockTrigger();\n\t\t\t\tsendSize('size','parentIFrame.size('+valString+')', customHeight, customWidth);\n\t\t\t}\n\t\t};\n\t}\n\n\tfunction initInterval(){\n\t\tif ( 0 !== interval ){\n\t\t\tlog('setInterval: '+interval+'ms');\n\t\t\tintervalTimer = setInterval(function(){\n\t\t\t\tsendSize('interval','setInterval: '+interval);\n\t\t\t},Math.abs(interval));\n\t\t}\n\t}\n\n\t/* istanbul ignore next */  //Not testable in PhantomJS\n\tfunction setupBodyMutationObserver(){\n\t\tfunction addImageLoadListners(mutation) {\n\t\t\tfunction addImageLoadListener(element){\n\t\t\t\tif (false === element.complete) {\n\t\t\t\t\tlog('Attach listeners to ' + element.src);\n\t\t\t\t\telement.addEventListener('load', imageLoaded, false);\n\t\t\t\t\telement.addEventListener('error', imageError, false);\n\t\t\t\t\telements.push(element);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif (mutation.type === 'attributes' && mutation.attributeName === 'src'){\n\t\t\t\taddImageLoadListener(mutation.target);\n\t\t\t} else if (mutation.type === 'childList'){\n\t\t\t\tArray.prototype.forEach.call(\n\t\t\t\t\tmutation.target.querySelectorAll('img'),\n\t\t\t\t\taddImageLoadListener\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\n\t\tfunction removeFromArray(element){\n\t\t\telements.splice(elements.indexOf(element),1);\n\t\t}\n\n\t\tfunction removeImageLoadListener(element){\n\t\t\tlog('Remove listeners from ' + element.src);\n\t\t\telement.removeEventListener('load', imageLoaded, false);\n\t\t\telement.removeEventListener('error', imageError, false);\n\t\t\tremoveFromArray(element);\n\t\t}\n\n\t\tfunction imageEventTriggered(event,type,typeDesc){\n\t\t\tremoveImageLoadListener(event.target);\n\t\t\tsendSize(type, typeDesc + ': ' + event.target.src, undefined, undefined);\n\t\t}\n\n\t\tfunction imageLoaded(event) {\n\t\t\timageEventTriggered(event,'imageLoad','Image loaded');\n\t\t}\n\n\t\tfunction imageError(event) {\n\t\t\timageEventTriggered(event,'imageLoadFailed','Image load failed');\n\t\t}\n\n\t\tfunction mutationObserved(mutations) {\n\t\t\tsendSize('mutationObserver','mutationObserver: ' + mutations[0].target + ' ' + mutations[0].type);\n\n\t\t\t//Deal with WebKit asyncing image loading when tags are injected into the page\n\t\t\tmutations.forEach(addImageLoadListners);\n\t\t}\n\n\t\tfunction createMutationObserver(){\n\t\t\tvar\n\t\t\t\ttarget = document.querySelector('body'),\n\n\t\t\t\tconfig = {\n\t\t\t\t\tattributes            : true,\n\t\t\t\t\tattributeOldValue     : false,\n\t\t\t\t\tcharacterData         : true,\n\t\t\t\t\tcharacterDataOldValue : false,\n\t\t\t\t\tchildList             : true,\n\t\t\t\t\tsubtree               : true\n\t\t\t\t};\n\n\t\t\tobserver = new MutationObserver(mutationObserved);\n\n\t\t\tlog('Create body MutationObserver');\n\t\t\tobserver.observe(target, config);\n\n\t\t\treturn observer;\n\t\t}\n\n\t\tvar\n\t\t\telements         = [],\n\t\t\tMutationObserver = window.MutationObserver || window.WebKitMutationObserver,\n\t\t\tobserver         = createMutationObserver();\n\n\t\treturn {\n\t\t\tdisconnect: function (){\n\t\t\t\tif ('disconnect' in observer){\n\t\t\t\t\tlog('Disconnect body MutationObserver');\n\t\t\t\t\tobserver.disconnect();\n\t\t\t\t\telements.forEach(removeImageLoadListener);\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n\n\tfunction setupMutationObserver(){\n\t\tvar\tforceIntervalTimer = 0 > interval;\n\n\t\t/* istanbul ignore if */ // Not testable in PhantomJS\n\t\tif (window.MutationObserver || window.WebKitMutationObserver){\n\t\t\tif (forceIntervalTimer) {\n\t\t\t\tinitInterval();\n\t\t\t} else {\n\t\t\t\tbodyObserver = setupBodyMutationObserver();\n\t\t\t}\n\t\t} else {\n\t\t\tlog('MutationObserver not supported in this browser!');\n\t\t\tinitInterval();\n\t\t}\n\t}\n\n\n\t// document.documentElement.offsetHeight is not reliable, so\n\t// we have to jump through hoops to get a better value.\n\tfunction getComputedStyle(prop,el) {\n\t\t/* istanbul ignore next */  //Not testable in PhantomJS\n\t\tfunction convertUnitsToPxForIE8(value) {\n\t\t\tvar PIXEL = /^\\d+(px)?$/i;\n\n\t\t\tif (PIXEL.test(value)) {\n\t\t\t\treturn parseInt(value,base);\n\t\t\t}\n\n\t\t\tvar\n\t\t\t\tstyle = el.style.left,\n\t\t\t\truntimeStyle = el.runtimeStyle.left;\n\n\t\t\tel.runtimeStyle.left = el.currentStyle.left;\n\t\t\tel.style.left = value || 0;\n\t\t\tvalue = el.style.pixelLeft;\n\t\t\tel.style.left = style;\n\t\t\tel.runtimeStyle.left = runtimeStyle;\n\n\t\t\treturn value;\n\t\t}\n\n\t\tvar retVal = 0;\n\t\tel =  el || document.body;\n\n\t\t/* istanbul ignore else */ // Not testable in phantonJS\n\t\tif (('defaultView' in document) && ('getComputedStyle' in document.defaultView)) {\n\t\t\tretVal = document.defaultView.getComputedStyle(el, null);\n\t\t\tretVal = (null !== retVal) ? retVal[prop] : 0;\n\t\t} else {//IE8\n\t\t\tretVal =  convertUnitsToPxForIE8(el.currentStyle[prop]);\n\t\t}\n\n\t\treturn parseInt(retVal,base);\n\t}\n\n\tfunction chkEventThottle(timer){\n\t\tif(timer > throttledTimer/2){\n\t\t\tthrottledTimer = 2*timer;\n\t\t\tlog('Event throttle increased to ' + throttledTimer + 'ms');\n\t\t}\n\t}\n\n\t//Idea from https://github.com/guardian/iframe-messenger\n\tfunction getMaxElement(side,elements) {\n\t\tvar\n\t\t\telementsLength = elements.length,\n\t\t\telVal          = 0,\n\t\t\tmaxVal         = 0,\n\t\t\tSide           = capitalizeFirstLetter(side),\n\t\t\ttimer          = getNow();\n\n\t\tfor (var i = 0; i < elementsLength; i++) {\n\t\t\telVal = elements[i].getBoundingClientRect()[side] + getComputedStyle('margin'+Side,elements[i]);\n\t\t\tif (elVal > maxVal) {\n\t\t\t\tmaxVal = elVal;\n\t\t\t}\n\t\t}\n\n\t\ttimer = getNow() - timer;\n\n\t\tlog('Parsed '+elementsLength+' HTML elements');\n\t\tlog('Element position calculated in ' + timer + 'ms');\n\n\t\tchkEventThottle(timer);\n\n\t\treturn maxVal;\n\t}\n\n\tfunction getAllMeasurements(dimention){\n\t\treturn [\n\t\t\tdimention.bodyOffset(),\n\t\t\tdimention.bodyScroll(),\n\t\t\tdimention.documentElementOffset(),\n\t\t\tdimention.documentElementScroll()\n\t\t];\n\t}\n\n\tfunction getTaggedElements(side,tag){\n\t\tfunction noTaggedElementsFound(){\n\t\t\twarn('No tagged elements ('+tag+') found on page');\n\t\t\treturn document.querySelectorAll('body *');\n\t\t}\n\n\t\tvar elements = document.querySelectorAll('['+tag+']');\n\n\t\tif (0 === elements.length) noTaggedElementsFound();\n\n\t\treturn getMaxElement(side,elements);\n\t}\n\n\tfunction getAllElements(){\n\t\treturn document.querySelectorAll('body *');\n\t}\n\n\tvar\n\t\tgetHeight = {\n\t\t\tbodyOffset: function getBodyOffsetHeight(){\n\t\t\t\treturn  document.body.offsetHeight + getComputedStyle('marginTop') + getComputedStyle('marginBottom');\n\t\t\t},\n\n\t\t\toffset: function(){\n\t\t\t\treturn getHeight.bodyOffset(); //Backwards compatability\n\t\t\t},\n\n\t\t\tbodyScroll: function getBodyScrollHeight(){\n\t\t\t\treturn document.body.scrollHeight;\n\t\t\t},\n\n\t\t\tcustom: function getCustomWidth(){\n\t\t\t\treturn customCalcMethods.height();\n\t\t\t},\n\n\t\t\tdocumentElementOffset: function getDEOffsetHeight(){\n\t\t\t\treturn document.documentElement.offsetHeight;\n\t\t\t},\n\n\t\t\tdocumentElementScroll: function getDEScrollHeight(){\n\t\t\t\treturn document.documentElement.scrollHeight;\n\t\t\t},\n\n\t\t\tmax: function getMaxHeight(){\n\t\t\t\treturn Math.max.apply(null,getAllMeasurements(getHeight));\n\t\t\t},\n\n\t\t\tmin: function getMinHeight(){\n\t\t\t\treturn Math.min.apply(null,getAllMeasurements(getHeight));\n\t\t\t},\n\n\t\t\tgrow: function growHeight(){\n\t\t\t\treturn getHeight.max(); //Run max without the forced downsizing\n\t\t\t},\n\n\t\t\tlowestElement: function getBestHeight(){\n\t\t\t\treturn Math.max(getHeight.bodyOffset(), getMaxElement('bottom',getAllElements()));\n\t\t\t},\n\n\t\t\ttaggedElement: function getTaggedElementsHeight(){\n\t\t\t\treturn getTaggedElements('bottom','data-iframe-height');\n\t\t\t}\n\t\t},\n\n\t\tgetWidth = {\n\t\t\tbodyScroll: function getBodyScrollWidth(){\n\t\t\t\treturn document.body.scrollWidth;\n\t\t\t},\n\n\t\t\tbodyOffset: function getBodyOffsetWidth(){\n\t\t\t\treturn document.body.offsetWidth;\n\t\t\t},\n\n\t\t\tcustom: function getCustomWidth(){\n\t\t\t\treturn customCalcMethods.width();\n\t\t\t},\n\n\t\t\tdocumentElementScroll: function getDEScrollWidth(){\n\t\t\t\treturn document.documentElement.scrollWidth;\n\t\t\t},\n\n\t\t\tdocumentElementOffset: function getDEOffsetWidth(){\n\t\t\t\treturn document.documentElement.offsetWidth;\n\t\t\t},\n\n\t\t\tscroll: function getMaxWidth(){\n\t\t\t\treturn Math.max(getWidth.bodyScroll(), getWidth.documentElementScroll());\n\t\t\t},\n\n\t\t\tmax: function getMaxWidth(){\n\t\t\t\treturn Math.max.apply(null,getAllMeasurements(getWidth));\n\t\t\t},\n\n\t\t\tmin: function getMinWidth(){\n\t\t\t\treturn Math.min.apply(null,getAllMeasurements(getWidth));\n\t\t\t},\n\n\t\t\trightMostElement: function rightMostElement(){\n\t\t\t\treturn getMaxElement('right', getAllElements());\n\t\t\t},\n\n\t\t\ttaggedElement: function getTaggedElementsWidth(){\n\t\t\t\treturn getTaggedElements('right', 'data-iframe-width');\n\t\t\t}\n\t\t};\n\n\n\tfunction sizeIFrame(triggerEvent, triggerEventDesc, customHeight, customWidth){\n\n\t\tfunction resizeIFrame(){\n\t\t\theight = currentHeight;\n\t\t\twidth  = currentWidth;\n\n\t\t\tsendMsg(height,width,triggerEvent);\n\t\t}\n\n\t\tfunction isSizeChangeDetected(){\n\t\t\tfunction checkTolarance(a,b){\n\t\t\t\tvar retVal = Math.abs(a-b) <= tolerance;\n\t\t\t\treturn !retVal;\n\t\t\t}\n\n\t\t\tcurrentHeight = (undefined !== customHeight)  ? customHeight : getHeight[heightCalcMode]();\n\t\t\tcurrentWidth  = (undefined !== customWidth )  ? customWidth  : getWidth[widthCalcMode]();\n\n\t\t\treturn\tcheckTolarance(height,currentHeight) || (calculateWidth && checkTolarance(width,currentWidth));\n\t\t}\n\n\t\tfunction isForceResizableEvent(){\n\t\t\treturn !(triggerEvent in {'init':1,'interval':1,'size':1});\n\t\t}\n\n\t\tfunction isForceResizableCalcMode(){\n\t\t\treturn (heightCalcMode in resetRequiredMethods) || (calculateWidth && widthCalcMode in resetRequiredMethods);\n\t\t}\n\n\t\tfunction logIgnored(){\n\t\t\tlog('No change in size detected');\n\t\t}\n\n\t\tfunction checkDownSizing(){\n\t\t\tif (isForceResizableEvent() && isForceResizableCalcMode()){\n\t\t\t\tresetIFrame(triggerEventDesc);\n\t\t\t} else if (!(triggerEvent in {'interval':1})){\n\t\t\t\tlogIgnored();\n\t\t\t}\n\t\t}\n\n\t\tvar\tcurrentHeight,currentWidth;\n\n\t\tif (isSizeChangeDetected() || 'init' === triggerEvent){\n\t\t\tlockTrigger();\n\t\t\tresizeIFrame();\n\t\t} else {\n\t\t\tcheckDownSizing();\n\t\t}\n\t}\n\n\tvar sizeIFrameThrottled = throttle(sizeIFrame);\n\n\tfunction sendSize(triggerEvent, triggerEventDesc, customHeight, customWidth){\n\t\tfunction recordTrigger(){\n\t\t\tif (!(triggerEvent in {'reset':1,'resetPage':1,'init':1})){\n\t\t\t\tlog( 'Trigger event: ' + triggerEventDesc );\n\t\t\t}\n\t\t}\n\n\t\tfunction isDoubleFiredEvent(){\n\t\t\treturn  triggerLocked && (triggerEvent in doubleEventList);\n\t\t}\n\n\t\tif (!isDoubleFiredEvent()){\n\t\t\trecordTrigger();\n\t\t\tsizeIFrameThrottled(triggerEvent, triggerEventDesc, customHeight, customWidth);\n\t\t} else {\n\t\t\tlog('Trigger event cancelled: '+triggerEvent);\n\t\t}\n\t}\n\n\tfunction lockTrigger(){\n\t\tif (!triggerLocked){\n\t\t\ttriggerLocked = true;\n\t\t\tlog('Trigger event lock on');\n\t\t}\n\t\tclearTimeout(triggerLockedTimer);\n\t\ttriggerLockedTimer = setTimeout(function(){\n\t\t\ttriggerLocked = false;\n\t\t\tlog('Trigger event lock off');\n\t\t\tlog('--');\n\t\t},eventCancelTimer);\n\t}\n\n\tfunction triggerReset(triggerEvent){\n\t\theight = getHeight[heightCalcMode]();\n\t\twidth  = getWidth[widthCalcMode]();\n\n\t\tsendMsg(height,width,triggerEvent);\n\t}\n\n\tfunction resetIFrame(triggerEventDesc){\n\t\tvar hcm = heightCalcMode;\n\t\theightCalcMode = heightCalcModeDefault;\n\n\t\tlog('Reset trigger event: ' + triggerEventDesc);\n\t\tlockTrigger();\n\t\ttriggerReset('reset');\n\n\t\theightCalcMode = hcm;\n\t}\n\n\tfunction sendMsg(height,width,triggerEvent,msg,targetOrigin){\n\t\tfunction setTargetOrigin(){\n\t\t\tif (undefined === targetOrigin){\n\t\t\t\ttargetOrigin = targetOriginDefault;\n\t\t\t} else {\n\t\t\t\tlog('Message targetOrigin: '+targetOrigin);\n\t\t\t}\n\t\t}\n\n\t\tfunction sendToParent(){\n\t\t\tvar\n\t\t\t\tsize  = height + ':' + width,\n\t\t\t\tmessage = myID + ':' +  size + ':' + triggerEvent + (undefined !== msg ? ':' + msg : '');\n\n\t\t\tlog('Sending message to host page (' + message + ')');\n\t\t\ttarget.postMessage( msgID + message, targetOrigin);\n\t\t}\n\n\t\tif(true === sendPermit){\n\t\t\tsetTargetOrigin();\n\t\t\tsendToParent();\n\t\t}\n\t}\n\n\tfunction receiver(event) {\n\t\tvar processRequestFromParent = {\n\t\t\tinit: function initFromParent(){\n\t\t\t\tfunction fireInit(){\n\t\t\t\t\tinitMsg = event.data;\n\t\t\t\t\ttarget  = event.source;\n\n\t\t\t\t\tinit();\n\t\t\t\t\tfirstRun = false;\n\t\t\t\t\tsetTimeout(function(){ initLock = false;},eventCancelTimer);\n\t\t\t\t}\n\n\t\t\t\tif (document.body){\n\t\t\t\t\tfireInit();\n\t\t\t\t} else {\n\t\t\t\t\tlog('Waiting for page ready');\n\t\t\t\t\taddEventListener(window,'readystatechange',processRequestFromParent.initFromParent);\n\t\t\t\t}\n\t\t\t},\n\n\t\t\treset: function resetFromParent(){\n\t\t\t\tif (!initLock){\n\t\t\t\t\tlog('Page size reset by host page');\n\t\t\t\t\ttriggerReset('resetPage');\n\t\t\t\t} else {\n\t\t\t\t\tlog('Page reset ignored by init');\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tresize: function resizeFromParent(){\n\t\t\t\tsendSize('resizeParent','Parent window requested size check');\n\t\t\t},\n\n\t\t\tmoveToAnchor: function moveToAnchorF(){\n\t\t\t\tinPageLinks.findTarget(getData());\n\t\t\t},\n\t\t\tinPageLink: function inPageLinkF() {this.moveToAnchor();}, //Backward compatability\n\n\t\t\tpageInfo: function pageInfoFromParent(){\n\t\t\t\tvar msgBody = getData();\n\t\t\t\tlog('PageInfoFromParent called from parent: ' + msgBody );\n\t\t\t\tpageInfoCallback(JSON.parse(msgBody));\n\t\t\t\tlog(' --');\n\t\t\t},\n\n\t\t\tmessage: function messageFromParent(){\n\t\t\t\tvar msgBody = getData();\n\n\t\t\t\tlog('MessageCallback called from parent: ' + msgBody );\n\t\t\t\tmessageCallback(JSON.parse(msgBody));\n\t\t\t\tlog(' --');\n\t\t\t}\n\t\t};\n\n\t\tfunction isMessageForUs(){\n\t\t\treturn msgID === (''+event.data).substr(0,msgIdLen); //''+ Protects against non-string messages\n\t\t}\n\n\t\tfunction getMessageType(){\n\t\t\treturn event.data.split(']')[1].split(':')[0];\n\t\t}\n\n\t\tfunction getData(){\n\t\t\treturn event.data.substr(event.data.indexOf(':')+1);\n\t\t}\n\n\t\tfunction isMiddleTier(){\n\t\t\treturn !(typeof module !== 'undefined' && module.exports) && ('iFrameResize' in window);\n\t\t}\n\n\t\tfunction isInitMsg(){\n\t\t\t//Test if this message is from a child below us. This is an ugly test, however, updating\n\t\t\t//the message format would break backwards compatibity.\n\t\t\treturn event.data.split(':')[2] in {'true':1,'false':1};\n\t\t}\n\n\t\tfunction callFromParent(){\n\t\t\tvar messageType = getMessageType();\n\n\t\t\tif (messageType in processRequestFromParent){\n\t\t\t\tprocessRequestFromParent[messageType]();\n\t\t\t} else if (!isMiddleTier() && !isInitMsg()){\n\t\t\t\twarn('Unexpected message ('+event.data+')');\n\t\t\t}\n\t\t}\n\n\t\tfunction processMessage(){\n\t\t\tif (false === firstRun) {\n\t\t\t\tcallFromParent();\n\t\t\t} else if (isInitMsg()) {\n\t\t\t\tprocessRequestFromParent.init();\n\t\t\t} else {\n\t\t\t\tlog('Ignored message of type \"' + getMessageType() + '\". Received before initialization.');\n\t\t\t}\n\t\t}\n\n\t\tif (isMessageForUs()){\n\t\t\tprocessMessage();\n\t\t}\n\t}\n\n\t//Normally the parent kicks things off when it detects the iFrame has loaded.\n\t//If this script is async-loaded, then tell parent page to retry init.\n\tfunction chkLateLoaded(){\n\t\tif('loading' !== document.readyState){\n\t\t\twindow.parent.postMessage('[iFrameResizerChild]Ready','*');\n\t\t}\n\t}\n\n\taddEventListener(window, 'message', receiver);\n\tchkLateLoaded();\n\n\t\n\n})();\n"]}