examples/assets/library/iframe-content.js
/*
* 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
* Contributor: Jure Mav - jure.mav@gmail.com
* Contributor: Ian Caunce - ian@hallnet.co.uk
*/
;(function(undefined) {
'use strict';
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 = '',
observer = null,
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,
messageCallback = function() { warn('MessageCallback function not defined'); },
readyCallback = function() {},
pageInfoCallback = 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 = {};
function addEventListener(el,evt,func) {
/* istanbul ignore else */ // Not testable in phantonJS
if ('addEventListener' in window) {
el.addEventListener(evt,func, false);
} else if ('attachEvent' in window) { //IE
el.attachEvent('on'+evt,func);
}
}
function removeEventListener(el,evt,func) {
/* istanbul ignore else */ // Not testable in phantonJS
if ('removeEventListener' in window) {
el.removeEventListener(evt,func, false);
} else if ('detachEvent' in window) { //IE
el.detachEvent('on'+evt,func);
}
}
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) {
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) {
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)) {
console.log(formatLogMsg(msg));
}
}
function warn(msg) {
if ('object' === typeof window.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');
readyCallback();
}
function readDataFromParent() {
function strBool(str) {
return 'true' === str ? true : false;
}
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 readDataFromPage() {
function readData() {
var data = window.iFrameResizer;
log('Reading data from page: ' + JSON.stringify(data));
messageCallback = ('messageCallback' in data) ? data.messageCallback : messageCallback;
readyCallback = ('readyCallback' in data) ? data.readyCallback : readyCallback;
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);
},
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';
clearFix.style.display = 'block'; //Guard against this having been globally redefined in CSS.
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();
//sendSize('autoResize','Auto Resize enabled');
} else if (false === resize && true === autoResize) {
autoResize=false;
stopEventListeners();
}
return autoResize;
},
close: function closeF() {
sendMsg(0,0,'close');
teardown();
},
getId: function getIdF() {
return myID;
},
getPageInfo: function getPageInfoF(callback) {
if ('function' === typeof callback) {
pageInfoCallback = callback;
sendMsg(0,0,'pageInfo');
} else {
pageInfoCallback = 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?customHeight:'')+(customWidth?','+customWidth:'');
//lockTrigger();
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));
}
}
/* istanbul ignore next */ //Not testable in PhantomJS
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 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;
/* istanbul ignore if */ // Not testable in PhantomJS
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) {
/* istanbul ignore next */ //Not testable in PhantomJS
function convertUnitsToPxForIE8(value) {
var PIXEL = /^\d+(px)?$/i;
if (PIXEL.test(value)) {
return parseInt(value,base);
}
var
style = el.style.left,
runtimeStyle = el.runtimeStyle.left;
el.runtimeStyle.left = el.currentStyle.left;
el.style.left = value || 0;
value = el.style.pixelLeft;
el.style.left = style;
el.runtimeStyle.left = runtimeStyle;
return value;
}
var retVal = 0;
el = el || document.body;
/* istanbul ignore else */ // Not testable in phantonJS
if (('defaultView' in document) && ('getComputedStyle' in document.defaultView)) {
retVal = document.defaultView.getComputedStyle(el, null);
retVal = (null !== retVal) ? retVal[prop] : 0;
} else {//IE8
retVal = convertUnitsToPxForIE8(el.currentStyle[prop]);
}
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(), 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() {
function fireInit() {
initMsg = event.data;
target = event.source;
init();
firstRun = false;
setTimeout(function() { initLock = false;},eventCancelTimer);
}
if (document.readyState === "interactive" || document.readyState === "complete") {
fireInit();
} else {
log('Waiting for page ready');
addEventListener(window,'readystatechange',processRequestFromParent.initFromParent);
}
},
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 );
pageInfoCallback(JSON.parse(msgBody));
log(' --');
},
message: function messageFromParent() {
var msgBody = getData();
log('MessageCallback called from parent: ' + msgBody );
messageCallback(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);
}
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);
chkLateLoaded();
})();