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* File: iframeResizer.js\n * Desc: Force iframes to size to content.\n * Requires: iframeResizer.contentWindow.js to be loaded into the target frame.\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: Reed Dadoune - reed@dadoune.com\n */\n\n\n;(function(window) {\n\t'use strict';\n\n\tvar\n\t\tcount                 = 0,\n\t\tlogEnabled            = false,\n\t\thiddenCheckEnabled    = false,\n\t\tmsgHeader             = 'message',\n\t\tmsgHeaderLen          = msgHeader.length,\n\t\tmsgId                 = '[iFrameSizer]', //Must match iframe msg ID\n\t\tmsgIdLen              = msgId.length,\n\t\tpagePosition          = null,\n\t\trequestAnimationFrame = window.requestAnimationFrame,\n\t\tresetRequiredMethods  = {max:1,scroll:1,bodyScroll:1,documentElementScroll:1},\n\t\tsettings              = {},\n\t\ttimer                 = null,\n\t\tlogId                 = 'Host Page',\n\n\t\tdefaults              = {\n\t\t\tautoResize                : true,\n\t\t\tbodyBackground            : null,\n\t\t\tbodyMargin                : null,\n\t\t\tbodyMarginV1              : 8,\n\t\t\tbodyPadding               : null,\n\t\t\tcheckOrigin               : true,\n\t\t\tinPageLinks               : false,\n\t\t\tenablePublicMethods       : true,\n\t\t\theightCalculationMethod   : 'bodyOffset',\n\t\t\tid                        : 'iFrameResizer',\n\t\t\tinterval                  : 32,\n\t\t\tlog                       : false,\n\t\t\tmaxHeight                 : Infinity,\n\t\t\tmaxWidth                  : Infinity,\n\t\t\tminHeight                 : 0,\n\t\t\tminWidth                  : 0,\n\t\t\tresizeFrom                : 'parent',\n\t\t\tscrolling                 : false,\n\t\t\tsizeHeight                : true,\n\t\t\tsizeWidth                 : false,\n\t\t\ttolerance                 : 0,\n\t\t\twidthCalculationMethod    : 'scroll',\n\t\t\tclosedCallback            : function(){},\n\t\t\tinitCallback              : function(){},\n\t\t\tmessageCallback           : function(){warn('MessageCallback function not defined');},\n\t\t\tresizedCallback           : function(){},\n\t\t\tscrollCallback            : function(){return true;}\n\t\t};\n\n\tfunction addEventListener(obj,evt,func){\n\t\t/* istanbul ignore else */ // Not testable in PhantonJS\n\t\tif ('addEventListener' in window){\n\t\t\tobj.addEventListener(evt,func, false);\n\t\t} else if ('attachEvent' in window){//IE\n\t\t\tobj.attachEvent('on'+evt,func);\n\t\t}\n\t}\n\n\tfunction setupRequestAnimationFrame(){\n\t\tvar\n\t\t\tvendors = ['moz', 'webkit', 'o', 'ms'],\n\t\t\tx;\n\n\t\t// Remove vendor prefixing if prefixed and break early if not\n\t\tfor (x = 0; x < vendors.length && !requestAnimationFrame; x += 1) {\n\t\t\trequestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];\n\t\t}\n\n\t\tif (!(requestAnimationFrame)){\n\t\t\tlog('setup','RequestAnimationFrame not supported');\n\t\t}\n\t}\n\n\tfunction getMyID(iframeId){\n\t\tvar retStr = 'Host page: '+iframeId;\n\n\t\tif (window.top!==window.self){\n\t\t\tif (window.parentIFrame && window.parentIFrame.getId){\n\t\t\t\tretStr = window.parentIFrame.getId()+': '+iframeId;\n\t\t\t} else {\n\t\t\t\tretStr = 'Nested host page: '+iframeId;\n\t\t\t}\n\t\t}\n\n\t\treturn retStr;\n\t}\n\n\tfunction formatLogHeader(iframeId){\n\t\treturn msgId + '[' + getMyID(iframeId) + ']';\n\t}\n\n\tfunction isLogEnabled(iframeId){\n\t\treturn settings[iframeId] ? settings[iframeId].log : logEnabled;\n\t}\n\n\tfunction log(iframeId,msg){\n\t\toutput('log',iframeId,msg,isLogEnabled(iframeId));\n\t}\n\n\tfunction info(iframeId,msg){\n\t\toutput('info',iframeId,msg,isLogEnabled(iframeId));\n\t}\n\n\tfunction warn(iframeId,msg){\n\t\toutput('warn',iframeId,msg,true);\n\t}\n\n\tfunction output(type,iframeId,msg,enabled){\n\t\tif (true === enabled && 'object' === typeof window.console){\n\t\t\tconsole[type](formatLogHeader(iframeId),msg);\n\t\t}\n\t}\n\n\tfunction iFrameListener(event){\n\t\tfunction resizeIFrame(){\n\t\t\tfunction resize(){\n\t\t\t\tsetSize(messageData);\n\t\t\t\tsetPagePosition(iframeId);\n\t\t\t}\n\n\t\t\tensureInRange('Height');\n\t\t\tensureInRange('Width');\n\n\t\t\tsyncResize(resize,messageData,'init');\n\t\t}\n\n\t\tfunction processMsg(){\n\t\t\tvar data = msg.substr(msgIdLen).split(':');\n\n\t\t\treturn {\n\t\t\t\tiframe: settings[data[0]].iframe,\n\t\t\t\tid:     data[0],\n\t\t\t\theight: data[1],\n\t\t\t\twidth:  data[2],\n\t\t\t\ttype:   data[3]\n\t\t\t};\n\t\t}\n\n\t\tfunction ensureInRange(Dimension){\n\t\t\tvar\n\t\t\t\tmax  = Number(settings[iframeId]['max'+Dimension]),\n\t\t\t\tmin  = Number(settings[iframeId]['min'+Dimension]),\n\t\t\t\tdimension = Dimension.toLowerCase(),\n\t\t\t\tsize = Number(messageData[dimension]);\n\n\t\t\tlog(iframeId,'Checking '+dimension+' is in range '+min+'-'+max);\n\n\t\t\tif (size<min) {\n\t\t\t\tsize=min;\n\t\t\t\tlog(iframeId,'Set '+dimension+' to min value');\n\t\t\t}\n\n\t\t\tif (size>max) {\n\t\t\t\tsize=max;\n\t\t\t\tlog(iframeId,'Set '+dimension+' to max value');\n\t\t\t}\n\n\t\t\tmessageData[dimension]=''+size;\n\t\t}\n\n\n\t\tfunction isMessageFromIFrame(){\n\t\t\tfunction checkAllowedOrigin(){\n\t\t\t\tfunction checkList(){\n\t\t\t\t\tvar\n\t\t\t\t\t\ti = 0,\n\t\t\t\t\t\tretCode = false;\n\n\t\t\t\t\tlog(iframeId,'Checking connection is from allowed list of origins: ' + checkOrigin);\n\n\t\t\t\t\tfor (; i < checkOrigin.length; i++) {\n\t\t\t\t\t\tif (checkOrigin[i] === origin) {\n\t\t\t\t\t\t\tretCode = true;\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\treturn retCode;\n\t\t\t\t}\n\n\t\t\t\tfunction checkSingle(){\n\t\t\t\t\tvar remoteHost  = settings[iframeId].remoteHost;\n\t\t\t\t\tlog(iframeId,'Checking connection is from: '+remoteHost);\n\t\t\t\t\treturn origin === remoteHost;\n\t\t\t\t}\n\n\t\t\t\treturn checkOrigin.constructor === Array ? checkList() : checkSingle();\n\t\t\t}\n\n\t\t\tvar\n\t\t\t\torigin      = event.origin,\n\t\t\t\tcheckOrigin = settings[iframeId].checkOrigin;\n\n\t\t\tif (checkOrigin && (''+origin !== 'null') && !checkAllowedOrigin()) {\n\t\t\t\tthrow new Error(\n\t\t\t\t\t'Unexpected message received from: ' + origin +\n\t\t\t\t\t' for ' + messageData.iframe.id +\n\t\t\t\t\t'. Message was: ' + event.data +\n\t\t\t\t\t'. This error can be disabled by setting the checkOrigin: false option or by providing of array of trusted domains.'\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn true;\n\t\t}\n\n\t\tfunction isMessageForUs(){\n\t\t\treturn msgId === (('' + msg).substr(0,msgIdLen)) && (msg.substr(msgIdLen).split(':')[0] in settings); //''+Protects against non-string msg\n\t\t}\n\n\t\tfunction isMessageFromMetaParent(){\n\t\t\t//Test if this message is from a parent above us. This is an ugly test, however, updating\n\t\t\t//the message format would break backwards compatibity.\n\t\t\tvar retCode = messageData.type in {'true':1,'false':1,'undefined':1};\n\n\t\t\tif (retCode){\n\t\t\t\tlog(iframeId,'Ignoring init message from meta parent page');\n\t\t\t}\n\n\t\t\treturn retCode;\n\t\t}\n\n\t\tfunction getMsgBody(offset){\n\t\t\treturn msg.substr(msg.indexOf(':')+msgHeaderLen+offset);\n\t\t}\n\n\t\tfunction forwardMsgFromIFrame(msgBody){\n\t\t\tlog(iframeId,'MessageCallback passed: {iframe: '+ messageData.iframe.id + ', message: ' + msgBody + '}');\n\t\t\tcallback('messageCallback',{\n\t\t\t\tiframe: messageData.iframe,\n\t\t\t\tmessage: JSON.parse(msgBody)\n\t\t\t});\n\t\t\tlog(iframeId,'--');\n\t\t}\n\n\t\tfunction checkIFrameExists(){\n\t\t\tvar retBool = true;\n\n\t\t\tif (null === messageData.iframe) {\n\t\t\t\twarn(iframeId,'IFrame ('+messageData.id+') not found');\n\t\t\t\tretBool = false;\n\t\t\t}\n\t\t\treturn retBool;\n\t\t}\n\n\t\tfunction getElementPosition(target){\n\t\t\tvar iFramePosition = target.getBoundingClientRect();\n\n\t\t\tgetPagePosition(iframeId);\n\n\t\t\treturn {\n\t\t\t\tx: Math.floor( Number(iFramePosition.left) + Number(pagePosition.x) ),\n\t\t\t\ty: Math.floor( Number(iFramePosition.top)  + Number(pagePosition.y) )\n\t\t\t};\n\t\t}\n\n\t\tfunction scrollRequestFromChild(addOffset){\n\t\t\t/* istanbul ignore next */  //Not testable in Karma\n\t\t\tfunction reposition(){\n\t\t\t\tpagePosition = newPosition;\n\t\t\t\tscrollTo();\n\t\t\t\tlog(iframeId,'--');\n\t\t\t}\n\n\t\t\tfunction calcOffset(){\n\t\t\t\treturn {\n\t\t\t\t\tx: Number(messageData.width) + offset.x,\n\t\t\t\t\ty: Number(messageData.height) + offset.y\n\t\t\t\t};\n\t\t\t}\n\n\t\t\tfunction scrollParent(){\n\t\t\t\tif (window.parentIFrame){\n\t\t\t\t\twindow.parentIFrame['scrollTo'+(addOffset?'Offset':'')](newPosition.x,newPosition.y);\n\t\t\t\t} else {\n\t\t\t\t\twarn(iframeId,'Unable to scroll to requested position, window.parentIFrame not found');\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tvar\n\t\t\t\toffset = addOffset ? getElementPosition(messageData.iframe) : {x:0,y:0},\n\t\t\t\tnewPosition = calcOffset();\n\n\t\t\tlog(iframeId,'Reposition requested from iFrame (offset x:'+offset.x+' y:'+offset.y+')');\n\n\t\t\tif(window.top!==window.self){\n\t\t\t\tscrollParent();\n\t\t\t} else {\n\t\t\t\treposition();\n\t\t\t}\n\t\t}\n\n\t\tfunction scrollTo(){\n\t\t\tif (false !== callback('scrollCallback',pagePosition)){\n\t\t\t\tsetPagePosition(iframeId);\n\t\t\t} else {\n\t\t\t\tunsetPagePosition();\n\t\t\t}\n\t\t}\n\n\t\tfunction findTarget(location){\n\t\t\tfunction jumpToTarget(){\n\t\t\t\tvar jumpPosition = getElementPosition(target);\n\n\t\t\t\tlog(iframeId,'Moving to in page link (#'+hash+') at x: '+jumpPosition.x+' y: '+jumpPosition.y);\n\t\t\t\tpagePosition = {\n\t\t\t\t\tx: jumpPosition.x,\n\t\t\t\t\ty: jumpPosition.y\n\t\t\t\t};\n\n\t\t\t\tscrollTo();\n\t\t\t\tlog(iframeId,'--');\n\t\t\t}\n\n\t\t\tfunction jumpToParent(){\n\t\t\t\tif (window.parentIFrame){\n\t\t\t\t\twindow.parentIFrame.moveToAnchor(hash);\n\t\t\t\t} else {\n\t\t\t\t\tlog(iframeId,'In page link #'+hash+' not found and window.parentIFrame not found');\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tvar\n\t\t\t\thash     = location.split('#')[1] || '',\n\t\t\t\thashData = decodeURIComponent(hash),\n\t\t\t\ttarget   = document.getElementById(hashData) || document.getElementsByName(hashData)[0];\n\n\t\t\tif (target){\n\t\t\t\tjumpToTarget();\n\t\t\t} else if(window.top!==window.self){\n\t\t\t\tjumpToParent();\n\t\t\t} else {\n\t\t\t\tlog(iframeId,'In page link #'+hash+' not found');\n\t\t\t}\n\t\t}\n\n\t\tfunction callback(funcName,val){\n\t\t\treturn chkCallback(iframeId,funcName,val);\n\t\t}\n\n\t\tfunction actionMsg(){\n\n\t\t\tif(settings[iframeId].firstRun) firstRun();\n\n\t\t\tswitch(messageData.type){\n\t\t\tcase 'close':\n\t\t\t\tcloseIFrame(messageData.iframe);\n\t\t\t\tbreak;\n\t\t\tcase 'message':\n\t\t\t\tforwardMsgFromIFrame(getMsgBody(6));\n\t\t\t\tbreak;\n\t\t\tcase 'scrollTo':\n\t\t\t\tscrollRequestFromChild(false);\n\t\t\t\tbreak;\n\t\t\tcase 'scrollToOffset':\n\t\t\t\tscrollRequestFromChild(true);\n\t\t\t\tbreak;\n\t\t\tcase 'inPageLink':\n\t\t\t\tfindTarget(getMsgBody(9));\n\t\t\t\tbreak;\n\t\t\tcase 'reset':\n\t\t\t\tresetIFrame(messageData);\n\t\t\t\tbreak;\n\t\t\tcase 'init':\n\t\t\t\tresizeIFrame();\n\t\t\t\tcallback('initCallback',messageData.iframe);\n\t\t\t\tcallback('resizedCallback',messageData);\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tresizeIFrame();\n\t\t\t\tcallback('resizedCallback',messageData);\n\t\t\t}\n\t\t}\n\n\t\tfunction hasSettings(iframeId){\n\t\t\tvar retBool = true;\n\n\t\t\tif (!settings[iframeId]){\n\t\t\t\tretBool = false;\n\t\t\t\twarn(messageData.type + ' No settings for ' + iframeId + '. Message was: ' + msg);\n\t\t\t}\n\n\t\t\treturn retBool;\n\t\t}\n\n\t\tfunction iFrameReadyMsgReceived(){\n\t\t\tfor (var iframeId in settings){\n\t\t\t\ttrigger('iFrame requested init',createOutgoingMsg(iframeId),document.getElementById(iframeId),iframeId);\n\t\t\t}\n\t\t}\n\n\t\tfunction firstRun() {\n\t\t\tsettings[iframeId].firstRun = false;\n\t\t}\n\n\t\tvar\n\t\t\tmsg = event.data,\n\t\t\tmessageData = {},\n\t\t\tiframeId = null;\n\n\t\tif('[iFrameResizerChild]Ready' === msg){\n\t\t\tiFrameReadyMsgReceived();\n\t\t} else if (isMessageForUs()){\n\t\t\tmessageData = processMsg();\n\t\t\tiframeId    = logId = messageData.id;\n\n\t\t\tif (!isMessageFromMetaParent() && hasSettings(iframeId)){\n\t\t\t\tlog(iframeId,'Received: '+msg);\n\n\t\t\t\tif ( checkIFrameExists() && isMessageFromIFrame() ){\n\t\t\t\t\tactionMsg();\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tinfo(iframeId,'Ignored: '+msg);\n\t\t}\n\n\t}\n\n\n\tfunction chkCallback(iframeId,funcName,val){\n\t\tvar\n\t\t\tfunc = null,\n\t\t\tretVal = null;\n\n\t\tif(settings[iframeId]){\n\t\t\tfunc = settings[iframeId][funcName];\n\n\t\t\tif( 'function' === typeof func){\n\t\t\t\tretVal = func(val);\n\t\t\t} else {\n\t\t\t\tthrow new TypeError(funcName+' on iFrame['+iframeId+'] is not a function');\n\t\t\t}\n\t\t}\n\n\t\treturn retVal;\n\t}\n\n\tfunction closeIFrame(iframe){\n\t\tvar iframeId = iframe.id;\n\n\t\tlog(iframeId,'Removing iFrame: '+iframeId);\n\t\tiframe.parentNode.removeChild(iframe);\n\t\tchkCallback(iframeId,'closedCallback',iframeId);\n\t\tlog(iframeId,'--');\n\t\tdelete settings[iframeId];\n\t}\n\n\tfunction getPagePosition(iframeId){\n\t\tif(null === pagePosition){\n\t\t\tpagePosition = {\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\tlog(iframeId,'Get page position: '+pagePosition.x+','+pagePosition.y);\n\t\t}\n\t}\n\n\tfunction setPagePosition(iframeId){\n\t\tif(null !== pagePosition){\n\t\t\twindow.scrollTo(pagePosition.x,pagePosition.y);\n\t\t\tlog(iframeId,'Set page position: '+pagePosition.x+','+pagePosition.y);\n\t\t\tunsetPagePosition();\n\t\t}\n\t}\n\n\tfunction unsetPagePosition(){\n\t\tpagePosition = null;\n\t}\n\n\tfunction resetIFrame(messageData){\n\t\tfunction reset(){\n\t\t\tsetSize(messageData);\n\t\t\ttrigger('reset','reset',messageData.iframe,messageData.id);\n\t\t}\n\n\t\tlog(messageData.id,'Size reset requested by '+('init'===messageData.type?'host page':'iFrame'));\n\t\tgetPagePosition(messageData.id);\n\t\tsyncResize(reset,messageData,'reset');\n\t}\n\n\tfunction setSize(messageData){\n\t\tfunction setDimension(dimension){\n\t\t\tmessageData.iframe.style[dimension] = messageData[dimension] + 'px';\n\t\t\tlog(\n\t\t\t\tmessageData.id,\n\t\t\t\t'IFrame (' + iframeId +\n\t\t\t\t') ' + dimension +\n\t\t\t\t' set to ' + messageData[dimension] + 'px'\n\t\t\t);\n\t\t}\n\n\t\tfunction chkZero(dimension){\n\t\t\t//FireFox sets dimension of hidden iFrames to zero.\n\t\t\t//So if we detect that set up an event to check for\n\t\t\t//when iFrame becomes visible.\n\n\t\t\t/* istanbul ignore next */  //Not testable in PhantomJS\n\t\t\tif (!hiddenCheckEnabled && '0' === messageData[dimension]){\n\t\t\t\thiddenCheckEnabled = true;\n\t\t\t\tlog(iframeId,'Hidden iFrame detected, creating visibility listener');\n\t\t\t\tfixHiddenIFrames();\n\t\t\t}\n\t\t}\n\n\t\tfunction processDimension(dimension){\n\t\t\tsetDimension(dimension);\n\t\t\tchkZero(dimension);\n\t\t}\n\n\t\tvar iframeId = messageData.iframe.id;\n\n\t\tif(settings[iframeId]){\n\t\t\tif( settings[iframeId].sizeHeight) { processDimension('height'); }\n\t\t\tif( settings[iframeId].sizeWidth ) { processDimension('width'); }\n\t\t}\n\t}\n\n\tfunction syncResize(func,messageData,doNotSync){\n\t\t/* istanbul ignore if */  //Not testable in PhantomJS\n\t\tif(doNotSync!==messageData.type && requestAnimationFrame){\n\t\t\tlog(messageData.id,'Requesting animation frame');\n\t\t\trequestAnimationFrame(func);\n\t\t} else {\n\t\t\tfunc();\n\t\t}\n\t}\n\n\tfunction trigger(calleeMsg,msg,iframe,id){\n\t\tfunction postMessageToIFrame(){\n\t\t\tlog(id,'[' + calleeMsg + '] Sending msg to iframe['+id+'] ('+msg+') targetOrigin: '+target);\n\t\t\tiframe.contentWindow.postMessage( msgId + msg, target );\n\t\t}\n\n\t\tfunction iFrameNotFound(){\n\t\t\tinfo(id,'[' + calleeMsg + '] IFrame('+id+') not found');\n\t\t\tif(settings[id]) {\n\t\t\t\tdelete settings[id];\n\t\t\t}\n\t\t}\n\n\t\tid = id || iframe.id;\n\t\tvar target = settings[id].targetOrigin;\n\n\t\tif(iframe && 'contentWindow' in iframe){\n\t\t\tpostMessageToIFrame();\n\t\t} else {\n\t\t\tiFrameNotFound();\n\t\t}\n\t}\n\n\tfunction createOutgoingMsg(iframeId){\n\t\treturn iframeId +\n\t\t\t':' + settings[iframeId].bodyMarginV1 +\n\t\t\t':' + settings[iframeId].sizeWidth +\n\t\t\t':' + settings[iframeId].log +\n\t\t\t':' + settings[iframeId].interval +\n\t\t\t':' + settings[iframeId].enablePublicMethods +\n\t\t\t':' + settings[iframeId].autoResize +\n\t\t\t':' + settings[iframeId].bodyMargin +\n\t\t\t':' + settings[iframeId].heightCalculationMethod +\n\t\t\t':' + settings[iframeId].bodyBackground +\n\t\t\t':' + settings[iframeId].bodyPadding +\n\t\t\t':' + settings[iframeId].tolerance +\n\t\t\t':' + settings[iframeId].inPageLinks +\n\t\t\t':' + settings[iframeId].resizeFrom +\n\t\t\t':' + settings[iframeId].widthCalculationMethod;\n\t}\n\n\tfunction setupIFrame(iframe,options){\n\t\tfunction setLimits(){\n\t\t\tfunction addStyle(style){\n\t\t\t\tif ((Infinity !== settings[iframeId][style]) && (0 !== settings[iframeId][style])){\n\t\t\t\t\tiframe.style[style] = settings[iframeId][style] + 'px';\n\t\t\t\t\tlog(iframeId,'Set '+style+' = '+settings[iframeId][style]+'px');\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tfunction chkMinMax(dimension){\n\t\t\t\tif (settings[iframeId]['min'+dimension]>settings[iframeId]['max'+dimension]){\n\t\t\t\t\tthrow new Error('Value for min'+dimension+' can not be greater than max'+dimension);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tchkMinMax('Height');\n\t\t\tchkMinMax('Width');\n\n\t\t\taddStyle('maxHeight');\n\t\t\taddStyle('minHeight');\n\t\t\taddStyle('maxWidth');\n\t\t\taddStyle('minWidth');\n\t\t}\n\n\t\tfunction newId(){\n\t\t\tvar id = (options.id || defaults.id + count++);\n\t\t\tif  (null!==document.getElementById(id)){\n\t\t\t\tid = id + count++;\n\t\t\t}\n\t\t\treturn id;\n\t\t}\n\n\t\tfunction ensureHasId(iframeId){\n\t\t\tlogId=iframeId;\n\t\t\tif (''===iframeId){\n\t\t\t\tiframe.id = iframeId =  newId();\n\t\t\t\tlogEnabled = (options || {}).log;\n\t\t\t\tlogId=iframeId;\n\t\t\t\tlog(iframeId,'Added missing iframe ID: '+ iframeId +' (' + iframe.src + ')');\n\t\t\t}\n\n\n\t\t\treturn iframeId;\n\t\t}\n\n\t\tfunction setScrolling(){\n\t\t\tlog(iframeId,'IFrame scrolling ' + (settings[iframeId].scrolling ? 'enabled' : 'disabled') + ' for ' + iframeId);\n\t\t\tiframe.style.overflow = false === settings[iframeId].scrolling ? 'hidden' : 'auto';\n\t\t\tiframe.scrolling      = false === settings[iframeId].scrolling ? 'no' : 'yes';\n\t\t}\n\n\t\t//The V1 iFrame script expects an int, where as in V2 expects a CSS\n\t\t//string value such as '1px 3em', so if we have an int for V2, set V1=V2\n\t\t//and then convert V2 to a string PX value.\n\t\tfunction setupBodyMarginValues(){\n\t\t\tif (('number'===typeof(settings[iframeId].bodyMargin)) || ('0'===settings[iframeId].bodyMargin)){\n\t\t\t\tsettings[iframeId].bodyMarginV1 = settings[iframeId].bodyMargin;\n\t\t\t\tsettings[iframeId].bodyMargin   = '' + settings[iframeId].bodyMargin + 'px';\n\t\t\t}\n\t\t}\n\n\t\tfunction checkReset(){\n\t\t\t// Reduce scope of firstRun to function, because IE8's JS execution\n\t\t\t// context stack is borked and this value gets externally\n\t\t\t// changed midway through running this function!!!\n\t\t\tvar\n\t\t\t\tfirstRun           = settings[iframeId].firstRun,\n\t\t\t\tresetRequertMethod = settings[iframeId].heightCalculationMethod in resetRequiredMethods;\n\n\t\t\tif (!firstRun && resetRequertMethod){\n\t\t\t\tresetIFrame({iframe:iframe, height:0, width:0, type:'init'});\n\t\t\t}\n\t\t}\n\n\t\tfunction setupIFrameObject(){\n\t\t\tif(Function.prototype.bind){ //Ignore unpolyfilled IE8.\n\t\t\t\tsettings[iframeId].iframe.iFrameResizer = {\n\n\t\t\t\t\tclose        : closeIFrame.bind(null,settings[iframeId].iframe),\n\n\t\t\t\t\tresize       : trigger.bind(null,'Window resize', 'resize', settings[iframeId].iframe),\n\n\t\t\t\t\tmoveToAnchor : function(anchor){\n\t\t\t\t\t\ttrigger('Move to anchor','inPageLink:'+anchor, settings[iframeId].iframe,iframeId);\n\t\t\t\t\t},\n\n\t\t\t\t\tsendMessage  : function(message){\n\t\t\t\t\t\tmessage = JSON.stringify(message);\n\t\t\t\t\t\ttrigger('Send Message','message:'+message, settings[iframeId].iframe,iframeId);\n\t\t\t\t\t}\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\n\t\t//We have to call trigger twice, as we can not be sure if all\n\t\t//iframes have completed loading when this code runs. The\n\t\t//event listener also catches the page changing in the iFrame.\n\t\tfunction init(msg){\n\t\t\tfunction iFrameLoaded(){\n\t\t\t\ttrigger('iFrame.onload',msg,iframe);\n\t\t\t\tcheckReset();\n\t\t\t}\n\n\t\t\taddEventListener(iframe,'load',iFrameLoaded);\n\t\t\ttrigger('init',msg,iframe);\n\t\t}\n\n\t\tfunction checkOptions(options){\n\t\t\tif ('object' !== typeof options){\n\t\t\t\tthrow new TypeError('Options is not an object');\n\t\t\t}\n\t\t}\n\n\t\tfunction copyOptions(options){\n\t\t\tfor (var option in defaults) {\n\t\t\t\tif (defaults.hasOwnProperty(option)){\n\t\t\t\t\tsettings[iframeId][option] = options.hasOwnProperty(option) ? options[option] : defaults[option];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tfunction getTargetOrigin (remoteHost){\n\t\t\treturn ('' === remoteHost || 'file://' === remoteHost) ? '*' : remoteHost;\n\t\t}\n\n\t\tfunction processOptions(options){\n\t\t\toptions = options || {};\n\t\t\tsettings[iframeId] = {\n\t\t\t\tfirstRun\t: true,\n\t\t\t\tiframe\t\t: iframe,\n\t\t\t\tremoteHost\t: iframe.src.split('/').slice(0,3).join('/')\n\t\t\t};\n\n\t\t\tcheckOptions(options);\n\t\t\tcopyOptions(options);\n\n\t\t\tsettings[iframeId].targetOrigin = true === settings[iframeId].checkOrigin ? getTargetOrigin(settings[iframeId].remoteHost) : '*';\n\t\t}\n\n\t\tfunction beenHere(){\n\t\t\treturn (iframeId in settings && 'iFrameResizer' in iframe);\n\t\t}\n\n\t\tvar iframeId = ensureHasId(iframe.id);\n\n\t\tif (!beenHere()){\n\t\t\tprocessOptions(options);\n\t\t\tsetScrolling();\n\t\t\tsetLimits();\n\t\t\tsetupBodyMarginValues();\n\t\t\tinit(createOutgoingMsg(iframeId));\n\t\t\tsetupIFrameObject();\n\t\t} else {\n\t\t\twarn(iframeId,'Ignored iFrame, already setup.');\n\t\t}\n\t}\n\n\tfunction debouce(fn,time){\n\t\tif (null === timer){\n\t\t\ttimer = setTimeout(function(){\n\t\t\t\ttimer = null;\n\t\t\t\tfn();\n\t\t\t}, time);\n\t\t}\n\t}\n\n\t/* istanbul ignore next */  //Not testable in PhantomJS\n\tfunction fixHiddenIFrames(){\n\t\tfunction checkIFrames(){\n\t\t\tfunction checkIFrame(settingId){\n\t\t\t\tfunction chkDimension(dimension){\n\t\t\t\t\treturn '0px' === settings[settingId].iframe.style[dimension];\n\t\t\t\t}\n\n\t\t\t\tfunction isVisible(el) {\n\t\t\t\t\treturn (null !== el.offsetParent);\n\t\t\t\t}\n\n\t\t\t\tif (isVisible(settings[settingId].iframe) && (chkDimension('height') || chkDimension('width'))){\n\t\t\t\t\ttrigger('Visibility change', 'resize', settings[settingId].iframe,settingId);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tfor (var settingId in settings){\n\t\t\t\tcheckIFrame(settingId);\n\t\t\t}\n\t\t}\n\n\t\tfunction mutationObserved(mutations){\n\t\t\tlog('window','Mutation observed: ' + mutations[0].target + ' ' + mutations[0].type);\n\t\t\tdebouce(checkIFrames,16);\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\t\tobserver = new MutationObserver(mutationObserved);\n\n\t\t\tobserver.observe(target, config);\n\t\t}\n\n\t\tvar MutationObserver = window.MutationObserver || window.WebKitMutationObserver;\n\n\t\tif (MutationObserver) createMutationObserver();\n\t}\n\n\n\tfunction resizeIFrames(event){\n\t\tfunction resize(){\n\t\t\tsendTriggerMsg('Window '+event,'resize');\n\t\t}\n\n\t\tlog('window','Trigger event: '+event);\n\t\tdebouce(resize,16);\n\t}\n\n\t/* istanbul ignore next */  //Not testable in PhantomJS\n\tfunction tabVisible() {\n\t\tfunction resize(){\n\t\t\tsendTriggerMsg('Tab Visable','resize');\n\t\t}\n\n\t\tif('hidden' !== document.visibilityState) {\n\t\t\tlog('document','Trigger event: Visiblity change');\n\t\t\tdebouce(resize,16);\n\t\t}\n\t}\n\n\tfunction sendTriggerMsg(eventName,event){\n\t\tfunction isIFrameResizeEnabled(iframeId) {\n\t\t\treturn\t'parent' === settings[iframeId].resizeFrom &&\n\t\t\t\t\tsettings[iframeId].autoResize &&\n\t\t\t\t\t!settings[iframeId].firstRun;\n\t\t}\n\n\t\tfor (var iframeId in settings){\n\t\t\tif(isIFrameResizeEnabled(iframeId)){\n\t\t\t\ttrigger(eventName,event,document.getElementById(iframeId),iframeId);\n\t\t\t}\n\t\t}\n\t}\n\n\tfunction setupEventListeners(){\n\t\taddEventListener(window,'message',iFrameListener);\n\n\t\taddEventListener(window,'resize', function(){resizeIFrames('resize');});\n\n\t\taddEventListener(document,'visibilitychange',tabVisible);\n\t\taddEventListener(document,'-webkit-visibilitychange',tabVisible); //Andriod 4.4\n\t\taddEventListener(window,'focusin',function(){resizeIFrames('focus');}); //IE8-9\n\t\taddEventListener(window,'focus',function(){resizeIFrames('focus');});\n\t}\n\n\n\tfunction factory(){\n\t\tfunction init(options,element){\n\t\t\tif(!element) {\n\t\t\t\treturn; //Stop mootools creating problems\n\t\t\t} else if(!element.tagName) {\n\t\t\t\tthrow new TypeError('Object is not a valid DOM element');\n\t\t\t} else if ('IFRAME' !== element.tagName.toUpperCase()) {\n\t\t\t\tthrow new TypeError('Expected <IFRAME> tag, found <'+element.tagName+'>');\n\t\t\t} else {\n\t\t\t\tsetupIFrame(element, options);\n\t\t\t\tiFrames.push(element);\n\t\t\t}\n\t\t}\n\n\t\tvar iFrames;\n\n\t\tsetupRequestAnimationFrame();\n\t\tsetupEventListeners();\n\n\t\treturn function iFrameResizeF(options,target){\n\t\t\tiFrames = []; //Only return iFrames past in on this call\n\n\t\t\tswitch (typeof(target)){\n\t\t\tcase 'undefined':\n\t\t\tcase 'string':\n\t\t\t\tArray.prototype.forEach.call(\n\t\t\t\t\tdocument.querySelectorAll( target || 'iframe' ),\n\t\t\t\t\tinit.bind(undefined, options)\n\t\t\t\t);\n\t\t\t\tbreak;\n\t\t\tcase 'object':\n\t\t\t\tinit(options,target);\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tthrow new TypeError('Unexpected data type ('+typeof(target)+')');\n\t\t\t}\n\n\t\t\treturn iFrames;\n\t\t};\n\t}\n\n\tfunction createJQueryPublicMethod($){\n\t\t$.fn.iFrameResize = function $iFrameResizeF(options) {\n\t\t\treturn this.filter('iframe').each(function (index, element) {\n\t\t\t\tsetupIFrame(element, options);\n\t\t\t}).end();\n\t\t};\n\t}\n\n\tif (window.jQuery) { createJQueryPublicMethod(jQuery); }\n\n\tif (typeof define === 'function' && define.amd) {\n\t\tdefine([],factory);\n\t} else if (typeof module === 'object' && typeof module.exports === 'object') { //Node for browserfy\n\t\tmodule.exports = factory();\n\t} else {\n\t\twindow.iFrameResize = window.iFrameResize || factory();\n\t}\n\n})(window || {});\n"]}