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/* * File: iframeResizer.contentWindow.js * Desc: Include this file in any page being loaded into an iframe * to force the iframe to resize to the content size. * Requires: iframeResizer.js on host page. * Doc: https://github.com/davidjbradshaw/iframe-resizer * Author: David J. Bradshaw - dave@bradshaw.net * */ // eslint-disable-next-line sonarjs/cognitive-complexity, no-shadow-restricted-names ;(function (undefined) { if (typeof window === 'undefined') return // don't run for server side render var autoResize = true, base = 10, bodyBackground = '', bodyMargin = 0, bodyMarginStr = '', bodyObserver = null, bodyPadding = '', calculateWidth = false, doubleEventList = { resize: 1, click: 1 }, eventCancelTimer = 128, firstRun = true, height = 1, heightCalcModeDefault = 'bodyOffset', heightCalcMode = heightCalcModeDefault, initLock = true, initMsg = '', inPageLinks = {}, interval = 32, intervalTimer = null, logging = false, msgID = '[iFrameSizer]', // Must match host page msg ID msgIdLen = msgID.length, myID = '', resetRequiredMethods = { max: 1, min: 1, bodyScroll: 1, documentElementScroll: 1 }, resizeFrom = 'child', sendPermit = true, target = window.parent, targetOriginDefault = '*', tolerance = 0, triggerLocked = false, triggerLockedTimer = null, throttledTimer = 16, width = 1, widthCalcModeDefault = 'scroll', widthCalcMode = widthCalcModeDefault, win = window, onMessage = function () { warn('onMessage function not defined') }, onReady = function () {}, onPageInfo = function () {}, customCalcMethods = { height: function () { warn('Custom height calculation function not defined') return document.documentElement.offsetHeight }, width: function () { warn('Custom width calculation function not defined') return document.body.scrollWidth } }, eventHandlersByName = {}, passiveSupported = false function noop() {} try { var options = Object.create( {}, { passive: { get: function () { passiveSupported = true } } } ) window.addEventListener('test', noop, options) window.removeEventListener('test', noop, options) } catch (error) { /* */ } function addEventListener(el, evt, func, options) { el.addEventListener(evt, func, passiveSupported ? options || {} : false) } function removeEventListener(el, evt, func) { el.removeEventListener(evt, func, false) } function capitalizeFirstLetter(string) { return string.charAt(0).toUpperCase() + string.slice(1) } // Based on underscore.js function throttle(func) { var context, args, result, timeout = null, previous = 0, later = function () { previous = getNow() timeout = null result = func.apply(context, args) if (!timeout) { // eslint-disable-next-line no-multi-assign context = args = null } } return function () { var now = getNow() if (!previous) { previous = now } var remaining = throttledTimer - (now - previous) context = this args = arguments if (remaining <= 0 || remaining > throttledTimer) { if (timeout) { clearTimeout(timeout) timeout = null } previous = now result = func.apply(context, args) if (!timeout) { // eslint-disable-next-line no-multi-assign context = args = null } } else if (!timeout) { timeout = setTimeout(later, remaining) } return result } } var getNow = Date.now || function () { /* istanbul ignore next */ // Not testable in PhantonJS return new Date().getTime() } function formatLogMsg(msg) { return msgID + '[' + myID + '] ' + msg } function log(msg) { if (logging && 'object' === typeof window.console) { // eslint-disable-next-line no-console console.log(formatLogMsg(msg)) } } function warn(msg) { if ('object' === typeof window.console) { // eslint-disable-next-line no-console console.warn(formatLogMsg(msg)) } } function init() { readDataFromParent() log('Initialising iFrame (' + location.href + ')') readDataFromPage() setMargin() setBodyStyle('background', bodyBackground) setBodyStyle('padding', bodyPadding) injectClearFixIntoBodyElement() checkHeightMode() checkWidthMode() stopInfiniteResizingOfIFrame() setupPublicMethods() startEventListeners() inPageLinks = setupInPageLinks() sendSize('init', 'Init message from host page') onReady() } function readDataFromParent() { function strBool(str) { return 'true' === str } var data = initMsg.substr(msgIdLen).split(':') myID = data[0] bodyMargin = undefined !== data[1] ? Number(data[1]) : bodyMargin // For V1 compatibility calculateWidth = undefined !== data[2] ? strBool(data[2]) : calculateWidth logging = undefined !== data[3] ? strBool(data[3]) : logging interval = undefined !== data[4] ? Number(data[4]) : interval autoResize = undefined !== data[6] ? strBool(data[6]) : autoResize bodyMarginStr = data[7] heightCalcMode = undefined !== data[8] ? data[8] : heightCalcMode bodyBackground = data[9] bodyPadding = data[10] tolerance = undefined !== data[11] ? Number(data[11]) : tolerance inPageLinks.enable = undefined !== data[12] ? strBool(data[12]) : false resizeFrom = undefined !== data[13] ? data[13] : resizeFrom widthCalcMode = undefined !== data[14] ? data[14] : widthCalcMode } function depricate(key) { var splitName = key.split('Callback') if (splitName.length === 2) { var name = 'on' + splitName[0].charAt(0).toUpperCase() + splitName[0].slice(1) this[name] = this[key] delete this[key] warn( "Deprecated: '" + key + "' has been renamed '" + name + "'. The old method will be removed in the next major version." ) } } function readDataFromPage() { function readData() { var data = window.iFrameResizer log('Reading data from page: ' + JSON.stringify(data)) Object.keys(data).forEach(depricate, data) onMessage = 'onMessage' in data ? data.onMessage : onMessage onReady = 'onReady' in data ? data.onReady : onReady targetOriginDefault = 'targetOrigin' in data ? data.targetOrigin : targetOriginDefault heightCalcMode = 'heightCalculationMethod' in data ? data.heightCalculationMethod : heightCalcMode widthCalcMode = 'widthCalculationMethod' in data ? data.widthCalculationMethod : widthCalcMode } function setupCustomCalcMethods(calcMode, calcFunc) { if ('function' === typeof calcMode) { log('Setup custom ' + calcFunc + 'CalcMethod') customCalcMethods[calcFunc] = calcMode calcMode = 'custom' } return calcMode } if ( 'iFrameResizer' in window && Object === window.iFrameResizer.constructor ) { readData() heightCalcMode = setupCustomCalcMethods(heightCalcMode, 'height') widthCalcMode = setupCustomCalcMethods(widthCalcMode, 'width') } log('TargetOrigin for parent set to: ' + targetOriginDefault) } function chkCSS(attr, value) { if (-1 !== value.indexOf('-')) { warn('Negative CSS value ignored for ' + attr) value = '' } return value } function setBodyStyle(attr, value) { if (undefined !== value && '' !== value && 'null' !== value) { document.body.style[attr] = value log('Body ' + attr + ' set to "' + value + '"') } } function setMargin() { // If called via V1 script, convert bodyMargin from int to str if (undefined === bodyMarginStr) { bodyMarginStr = bodyMargin + 'px' } setBodyStyle('margin', chkCSS('margin', bodyMarginStr)) } function stopInfiniteResizingOfIFrame() { document.documentElement.style.height = '' document.body.style.height = '' log('HTML & body height set to "auto"') } function manageTriggerEvent(options) { var listener = { add: function (eventName) { function handleEvent() { sendSize(options.eventName, options.eventType) } eventHandlersByName[eventName] = handleEvent addEventListener(window, eventName, handleEvent, { passive: true }) }, remove: function (eventName) { var handleEvent = eventHandlersByName[eventName] delete eventHandlersByName[eventName] removeEventListener(window, eventName, handleEvent) } } if (options.eventNames && Array.prototype.map) { options.eventName = options.eventNames[0] options.eventNames.map(listener[options.method]) } else { listener[options.method](options.eventName) } log( capitalizeFirstLetter(options.method) + ' event listener: ' + options.eventType ) } function manageEventListeners(method) { manageTriggerEvent({ method: method, eventType: 'Animation Start', eventNames: ['animationstart', 'webkitAnimationStart'] }) manageTriggerEvent({ method: method, eventType: 'Animation Iteration', eventNames: ['animationiteration', 'webkitAnimationIteration'] }) manageTriggerEvent({ method: method, eventType: 'Animation End', eventNames: ['animationend', 'webkitAnimationEnd'] }) manageTriggerEvent({ method: method, eventType: 'Input', eventName: 'input' }) manageTriggerEvent({ method: method, eventType: 'Mouse Up', eventName: 'mouseup' }) manageTriggerEvent({ method: method, eventType: 'Mouse Down', eventName: 'mousedown' }) manageTriggerEvent({ method: method, eventType: 'Orientation Change', eventName: 'orientationchange' }) manageTriggerEvent({ method: method, eventType: 'Print', eventName: ['afterprint', 'beforeprint'] }) manageTriggerEvent({ method: method, eventType: 'Ready State Change', eventName: 'readystatechange' }) manageTriggerEvent({ method: method, eventType: 'Touch Start', eventName: 'touchstart' }) manageTriggerEvent({ method: method, eventType: 'Touch End', eventName: 'touchend' }) manageTriggerEvent({ method: method, eventType: 'Touch Cancel', eventName: 'touchcancel' }) manageTriggerEvent({ method: method, eventType: 'Transition Start', eventNames: [ 'transitionstart', 'webkitTransitionStart', 'MSTransitionStart', 'oTransitionStart', 'otransitionstart' ] }) manageTriggerEvent({ method: method, eventType: 'Transition Iteration', eventNames: [ 'transitioniteration', 'webkitTransitionIteration', 'MSTransitionIteration', 'oTransitionIteration', 'otransitioniteration' ] }) manageTriggerEvent({ method: method, eventType: 'Transition End', eventNames: [ 'transitionend', 'webkitTransitionEnd', 'MSTransitionEnd', 'oTransitionEnd', 'otransitionend' ] }) if ('child' === resizeFrom) { manageTriggerEvent({ method: method, eventType: 'IFrame Resized', eventName: 'resize' }) } } function checkCalcMode(calcMode, calcModeDefault, modes, type) { if (calcModeDefault !== calcMode) { if (!(calcMode in modes)) { warn( calcMode + ' is not a valid option for ' + type + 'CalculationMethod.' ) calcMode = calcModeDefault } log(type + ' calculation method set to "' + calcMode + '"') } return calcMode } function checkHeightMode() { heightCalcMode = checkCalcMode( heightCalcMode, heightCalcModeDefault, getHeight, 'height' ) } function checkWidthMode() { widthCalcMode = checkCalcMode( widthCalcMode, widthCalcModeDefault, getWidth, 'width' ) } function startEventListeners() { if (true === autoResize) { manageEventListeners('add') setupMutationObserver() } else { log('Auto Resize disabled') } } // function stopMsgsToParent() { // log('Disable outgoing messages') // sendPermit = false // } // function removeMsgListener() { // log('Remove event listener: Message') // removeEventListener(window, 'message', receiver) // } function disconnectMutationObserver() { if (null !== bodyObserver) { /* istanbul ignore next */ // Not testable in PhantonJS bodyObserver.disconnect() } } function stopEventListeners() { manageEventListeners('remove') disconnectMutationObserver() clearInterval(intervalTimer) } // function teardown() { // stopMsgsToParent() // removeMsgListener() // if (true === autoResize) stopEventListeners() // } function injectClearFixIntoBodyElement() { var clearFix = document.createElement('div') clearFix.style.clear = 'both' // Guard against the following having been globally redefined in CSS. clearFix.style.display = 'block' clearFix.style.height = '0' document.body.appendChild(clearFix) } function setupInPageLinks() { function getPagePosition() { return { x: window.pageXOffset !== undefined ? window.pageXOffset : document.documentElement.scrollLeft, y: window.pageYOffset !== undefined ? window.pageYOffset : document.documentElement.scrollTop } } function getElementPosition(el) { var elPosition = el.getBoundingClientRect(), pagePosition = getPagePosition() return { x: parseInt(elPosition.left, 10) + parseInt(pagePosition.x, 10), y: parseInt(elPosition.top, 10) + parseInt(pagePosition.y, 10) } } function findTarget(location) { function jumpToTarget(target) { var jumpPosition = getElementPosition(target) log( 'Moving to in page link (#' + hash + ') at x: ' + jumpPosition.x + ' y: ' + jumpPosition.y ) sendMsg(jumpPosition.y, jumpPosition.x, 'scrollToOffset') // X&Y reversed at sendMsg uses height/width } var hash = location.split('#')[1] || location, // Remove # if present hashData = decodeURIComponent(hash), target = document.getElementById(hashData) || document.getElementsByName(hashData)[0] if (undefined !== target) { jumpToTarget(target) } else { log( 'In page link (#' + hash + ') not found in iFrame, so sending to parent' ) sendMsg(0, 0, 'inPageLink', '#' + hash) } } function checkLocationHash() { if ('' !== location.hash && '#' !== location.hash) { findTarget(location.href) } } function bindAnchors() { function setupLink(el) { function linkClicked(e) { e.preventDefault() /* jshint validthis:true */ findTarget(this.getAttribute('href')) } if ('#' !== el.getAttribute('href')) { addEventListener(el, 'click', linkClicked) } } Array.prototype.forEach.call( document.querySelectorAll('a[href^="#"]'), setupLink ) } function bindLocationHash() { addEventListener(window, 'hashchange', checkLocationHash) } function initCheck() { // Check if page loaded with location hash after init resize setTimeout(checkLocationHash, eventCancelTimer) } function enableInPageLinks() { /* istanbul ignore else */ // Not testable in phantonJS if (Array.prototype.forEach && document.querySelectorAll) { log('Setting up location.hash handlers') bindAnchors() bindLocationHash() initCheck() } else { warn( 'In page linking not fully supported in this browser! (See README.md for IE8 workaround)' ) } } if (inPageLinks.enable) { enableInPageLinks() } else { log('In page linking not enabled') } return { findTarget: findTarget } } function setupPublicMethods() { log('Enable public methods') win.parentIFrame = { autoResize: function autoResizeF(resize) { if (true === resize && false === autoResize) { autoResize = true startEventListeners() } else if (false === resize && true === autoResize) { autoResize = false stopEventListeners() } sendMsg(0, 0, 'autoResize', JSON.stringify(autoResize)) return autoResize }, close: function closeF() { sendMsg(0, 0, 'close') // teardown() }, getId: function getIdF() { return myID }, getPageInfo: function getPageInfoF(callback) { if ('function' === typeof callback) { onPageInfo = callback sendMsg(0, 0, 'pageInfo') } else { onPageInfo = function () {} sendMsg(0, 0, 'pageInfoStop') } }, moveToAnchor: function moveToAnchorF(hash) { inPageLinks.findTarget(hash) }, reset: function resetF() { resetIFrame('parentIFrame.reset') }, scrollTo: function scrollToF(x, y) { sendMsg(y, x, 'scrollTo') // X&Y reversed at sendMsg uses height/width }, scrollToOffset: function scrollToF(x, y) { sendMsg(y, x, 'scrollToOffset') // X&Y reversed at sendMsg uses height/width }, sendMessage: function sendMessageF(msg, targetOrigin) { sendMsg(0, 0, 'message', JSON.stringify(msg), targetOrigin) }, setHeightCalculationMethod: function setHeightCalculationMethodF( heightCalculationMethod ) { heightCalcMode = heightCalculationMethod checkHeightMode() }, setWidthCalculationMethod: function setWidthCalculationMethodF( widthCalculationMethod ) { widthCalcMode = widthCalculationMethod checkWidthMode() }, setTargetOrigin: function setTargetOriginF(targetOrigin) { log('Set targetOrigin: ' + targetOrigin) targetOriginDefault = targetOrigin }, size: function sizeF(customHeight, customWidth) { var valString = '' + (customHeight || '') + (customWidth ? ',' + customWidth : '') sendSize( 'size', 'parentIFrame.size(' + valString + ')', customHeight, customWidth ) } } } function initInterval() { if (0 !== interval) { log('setInterval: ' + interval + 'ms') intervalTimer = setInterval(function () { sendSize('interval', 'setInterval: ' + interval) }, Math.abs(interval)) } } // Not testable in PhantomJS /* istanbul ignore next */ function setupBodyMutationObserver() { function addImageLoadListners(mutation) { function addImageLoadListener(element) { if (false === element.complete) { log('Attach listeners to ' + element.src) element.addEventListener('load', imageLoaded, false) element.addEventListener('error', imageError, false) elements.push(element) } } if (mutation.type === 'attributes' && mutation.attributeName === 'src') { addImageLoadListener(mutation.target) } else if (mutation.type === 'childList') { Array.prototype.forEach.call( mutation.target.querySelectorAll('img'), addImageLoadListener ) } } function removeFromArray(element) { elements.splice(elements.indexOf(element), 1) } function removeImageLoadListener(element) { log('Remove listeners from ' + element.src) element.removeEventListener('load', imageLoaded, false) element.removeEventListener('error', imageError, false) removeFromArray(element) } function imageEventTriggered(event, type, typeDesc) { removeImageLoadListener(event.target) sendSize(type, typeDesc + ': ' + event.target.src, undefined, undefined) } function imageLoaded(event) { imageEventTriggered(event, 'imageLoad', 'Image loaded') } function imageError(event) { imageEventTriggered(event, 'imageLoadFailed', 'Image load failed') } function mutationObserved(mutations) { sendSize( 'mutationObserver', 'mutationObserver: ' + mutations[0].target + ' ' + mutations[0].type ) // Deal with WebKit / Blink asyncing image loading when tags are injected into the page mutations.forEach(addImageLoadListners) } function createMutationObserver() { var target = document.querySelector('body'), config = { attributes: true, attributeOldValue: false, characterData: true, characterDataOldValue: false, childList: true, subtree: true } observer = new MutationObserver(mutationObserved) log('Create body MutationObserver') observer.observe(target, config) return observer } var elements = [], MutationObserver = window.MutationObserver || window.WebKitMutationObserver, observer = createMutationObserver() return { disconnect: function () { if ('disconnect' in observer) { log('Disconnect body MutationObserver') observer.disconnect() elements.forEach(removeImageLoadListener) } } } } function setupMutationObserver() { var forceIntervalTimer = 0 > interval // Not testable in PhantomJS /* istanbul ignore if */ if ( window.MutationObserver || window.WebKitMutationObserver ) { if (forceIntervalTimer) { initInterval() } else { bodyObserver = setupBodyMutationObserver() } } else { log('MutationObserver not supported in this browser!') initInterval() } } // document.documentElement.offsetHeight is not reliable, so // we have to jump through hoops to get a better value. function getComputedStyle(prop, el) { var retVal = 0 el = el || document.body // Not testable in phantonJS retVal = document.defaultView.getComputedStyle(el, null) retVal = null !== retVal ? retVal[prop] : 0 return parseInt(retVal, base) } function chkEventThottle(timer) { if (timer > throttledTimer / 2) { throttledTimer = 2 * timer log('Event throttle increased to ' + throttledTimer + 'ms') } } // Idea from https://github.com/guardian/iframe-messenger function getMaxElement(side, elements) { var elementsLength = elements.length, elVal = 0, maxVal = 0, Side = capitalizeFirstLetter(side), timer = getNow() for (var i = 0; i < elementsLength; i++) { elVal = elements[i].getBoundingClientRect()[side] + getComputedStyle('margin' + Side, elements[i]) if (elVal > maxVal) { maxVal = elVal } } timer = getNow() - timer log('Parsed ' + elementsLength + ' HTML elements') log('Element position calculated in ' + timer + 'ms') chkEventThottle(timer) return maxVal } function getAllMeasurements(dimention) { return [ dimention.bodyOffset(), dimention.bodyScroll(), dimention.documentElementOffset(), dimention.documentElementScroll() ] } function getTaggedElements(side, tag) { function noTaggedElementsFound() { warn('No tagged elements (' + tag + ') found on page') return document.querySelectorAll('body *') } var elements = document.querySelectorAll('[' + tag + ']') if (0 === elements.length) noTaggedElementsFound() return getMaxElement(side, elements) } function getAllElements() { return document.querySelectorAll('body *') } var getHeight = { bodyOffset: function getBodyOffsetHeight() { return ( document.body.offsetHeight + getComputedStyle('marginTop') + getComputedStyle('marginBottom') ) }, offset: function () { return getHeight.bodyOffset() // Backwards compatability }, bodyScroll: function getBodyScrollHeight() { return document.body.scrollHeight }, custom: function getCustomWidth() { return customCalcMethods.height() }, documentElementOffset: function getDEOffsetHeight() { return document.documentElement.offsetHeight }, documentElementScroll: function getDEScrollHeight() { return document.documentElement.scrollHeight }, max: function getMaxHeight() { return Math.max.apply(null, getAllMeasurements(getHeight)) }, min: function getMinHeight() { return Math.min.apply(null, getAllMeasurements(getHeight)) }, grow: function growHeight() { return getHeight.max() // Run max without the forced downsizing }, lowestElement: function getBestHeight() { return Math.max( getHeight.bodyOffset() || getHeight.documentElementOffset(), getMaxElement('bottom', getAllElements()) ) }, taggedElement: function getTaggedElementsHeight() { return getTaggedElements('bottom', 'data-iframe-height') } }, getWidth = { bodyScroll: function getBodyScrollWidth() { return document.body.scrollWidth }, bodyOffset: function getBodyOffsetWidth() { return document.body.offsetWidth }, custom: function getCustomWidth() { return customCalcMethods.width() }, documentElementScroll: function getDEScrollWidth() { return document.documentElement.scrollWidth }, documentElementOffset: function getDEOffsetWidth() { return document.documentElement.offsetWidth }, scroll: function getMaxWidth() { return Math.max(getWidth.bodyScroll(), getWidth.documentElementScroll()) }, max: function getMaxWidth() { return Math.max.apply(null, getAllMeasurements(getWidth)) }, min: function getMinWidth() { return Math.min.apply(null, getAllMeasurements(getWidth)) }, rightMostElement: function rightMostElement() { return getMaxElement('right', getAllElements()) }, taggedElement: function getTaggedElementsWidth() { return getTaggedElements('right', 'data-iframe-width') } } function sizeIFrame( triggerEvent, triggerEventDesc, customHeight, customWidth ) { function resizeIFrame() { height = currentHeight width = currentWidth sendMsg(height, width, triggerEvent) } function isSizeChangeDetected() { function checkTolarance(a, b) { var retVal = Math.abs(a - b) <= tolerance return !retVal } currentHeight = undefined !== customHeight ? customHeight : getHeight[heightCalcMode]() currentWidth = undefined !== customWidth ? customWidth : getWidth[widthCalcMode]() return ( checkTolarance(height, currentHeight) || (calculateWidth && checkTolarance(width, currentWidth)) ) } function isForceResizableEvent() { return !(triggerEvent in { init: 1, interval: 1, size: 1 }) } function isForceResizableCalcMode() { return ( heightCalcMode in resetRequiredMethods || (calculateWidth && widthCalcMode in resetRequiredMethods) ) } function logIgnored() { log('No change in size detected') } function checkDownSizing() { if (isForceResizableEvent() && isForceResizableCalcMode()) { resetIFrame(triggerEventDesc) } else if (!(triggerEvent in { interval: 1 })) { logIgnored() } } var currentHeight, currentWidth if (isSizeChangeDetected() || 'init' === triggerEvent) { lockTrigger() resizeIFrame() } else { checkDownSizing() } } var sizeIFrameThrottled = throttle(sizeIFrame) function sendSize(triggerEvent, triggerEventDesc, customHeight, customWidth) { function recordTrigger() { if (!(triggerEvent in { reset: 1, resetPage: 1, init: 1 })) { log('Trigger event: ' + triggerEventDesc) } } function isDoubleFiredEvent() { return triggerLocked && triggerEvent in doubleEventList } if (!isDoubleFiredEvent()) { recordTrigger() if (triggerEvent === 'init') { sizeIFrame(triggerEvent, triggerEventDesc, customHeight, customWidth) } else { sizeIFrameThrottled( triggerEvent, triggerEventDesc, customHeight, customWidth ) } } else { log('Trigger event cancelled: ' + triggerEvent) } } function lockTrigger() { if (!triggerLocked) { triggerLocked = true log('Trigger event lock on') } clearTimeout(triggerLockedTimer) triggerLockedTimer = setTimeout(function () { triggerLocked = false log('Trigger event lock off') log('--') }, eventCancelTimer) } function triggerReset(triggerEvent) { height = getHeight[heightCalcMode]() width = getWidth[widthCalcMode]() sendMsg(height, width, triggerEvent) } function resetIFrame(triggerEventDesc) { var hcm = heightCalcMode heightCalcMode = heightCalcModeDefault log('Reset trigger event: ' + triggerEventDesc) lockTrigger() triggerReset('reset') heightCalcMode = hcm } function sendMsg(height, width, triggerEvent, msg, targetOrigin) { function setTargetOrigin() { if (undefined === targetOrigin) { targetOrigin = targetOriginDefault } else { log('Message targetOrigin: ' + targetOrigin) } } function sendToParent() { var size = height + ':' + width, message = myID + ':' + size + ':' + triggerEvent + (undefined !== msg ? ':' + msg : '') log('Sending message to host page (' + message + ')') target.postMessage(msgID + message, targetOrigin) } if (true === sendPermit) { setTargetOrigin() sendToParent() } } function receiver(event) { var processRequestFromParent = { init: function initFromParent() { initMsg = event.data target = event.source init() firstRun = false setTimeout(function () { initLock = false }, eventCancelTimer) }, reset: function resetFromParent() { if (!initLock) { log('Page size reset by host page') triggerReset('resetPage') } else { log('Page reset ignored by init') } }, resize: function resizeFromParent() { sendSize('resizeParent', 'Parent window requested size check') }, moveToAnchor: function moveToAnchorF() { inPageLinks.findTarget(getData()) }, inPageLink: function inPageLinkF() { this.moveToAnchor() }, // Backward compatability pageInfo: function pageInfoFromParent() { var msgBody = getData() log('PageInfoFromParent called from parent: ' + msgBody) onPageInfo(JSON.parse(msgBody)) log(' --') }, message: function messageFromParent() { var msgBody = getData() log('onMessage called from parent: ' + msgBody) // eslint-disable-next-line sonarjs/no-extra-arguments onMessage(JSON.parse(msgBody)) log(' --') } } function isMessageForUs() { return msgID === ('' + event.data).substr(0, msgIdLen) // ''+ Protects against non-string messages } function getMessageType() { return event.data.split(']')[1].split(':')[0] } function getData() { return event.data.substr(event.data.indexOf(':') + 1) } function isMiddleTier() { return ( (!(typeof module !== 'undefined' && module.exports) && 'iFrameResize' in window) || ('jQuery' in window && 'iFrameResize' in window.jQuery.prototype) ) } function isInitMsg() { // Test if this message is from a child below us. This is an ugly test, however, updating // the message format would break backwards compatibity. return event.data.split(':')[2] in { true: 1, false: 1 } } function callFromParent() { var messageType = getMessageType() if (messageType in processRequestFromParent) { processRequestFromParent[messageType]() } else if (!isMiddleTier() && !isInitMsg()) { warn('Unexpected message (' + event.data + ')') } } function processMessage() { if (false === firstRun) { callFromParent() } else if (isInitMsg()) { processRequestFromParent.init() } else { log( 'Ignored message of type "' + getMessageType() + '". Received before initialization.' ) } } if (isMessageForUs()) { processMessage() } } // Normally the parent kicks things off when it detects the iFrame has loaded. // If this script is async-loaded, then tell parent page to retry init. function chkLateLoaded() { if ('loading' !== document.readyState) { window.parent.postMessage('[iFrameResizerChild]Ready', '*') } } addEventListener(window, 'message', receiver) addEventListener(window, 'readystatechange', chkLateLoaded) chkLateLoaded() })()