Version 5.0.6
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@@ -5,13 +5,15 @@
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( function () {
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"use strict";
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var _origin;
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var _div;
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var _posting = false;
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var _timer;
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var _timeout = 200; //ms
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var _embedId = '';
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var _failSafe = null;
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let _origin;
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let _div;
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let _embedId = '';
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let _failSafe = null;
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/**
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* @type {ResizeObserver}
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*/
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let _ro;
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/**
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* Init method, called when the document is ready
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@@ -26,15 +28,10 @@
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// Work out our URL
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_div = ips.utils.get('ipsEmbed');
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var url = ips.utils.parseURL( window.location );
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if( url.protocol == '' || url.protocol == ':' ){
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utils.log( url );
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url.protocol = window.location.protocol;
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}
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const url = new URL(window.location.href);
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// Set our origin
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_origin = url.protocol + '//' + url.host;
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_origin = url.origin;
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ips.utils.log( "Origin in loader is " + _origin );
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// Hide the content
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@@ -68,68 +65,66 @@
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*
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* @returns {void}
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*/
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function startTimeout() {
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function createResizeObserver() {
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ips.utils.log("Creating resize observer for external embed...");
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let debounceLastCall=0, debounceTimeout, debounceInterval=200, sentMessage=false;
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const debouncePostMessage = (height) => {
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clearTimeout(debounceTimeout);
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const delta = Date.now() - debounceLastCall - debounceInterval;
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debounceLastCall = Date.now();
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debounceTimeout = setTimeout(
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() => {
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if (!sentMessage) {
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sentMessage = true;
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ips.utils.fadeIn(_div);
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}
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_div.parentNode.className = '';
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_postMessage('height', {height})
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},
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Math.max(0, -delta)
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);
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}
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var currentSize = 0;
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var repeats = 0;
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ips.utils.log("Starting timeout...");
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// Main loop
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_timer = setInterval( function () {
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// What we want to do here is make the loading process more pleasant and less jumpy.
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// To do that, we'll make the embed invisible until we've fetched the same height 6 times
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// in a row (approx 1 second). If that happens we'll assume it has finished loading, and then
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// we'll fade it in and start sending the recorded height to the parent for resizing.
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var height = ips.utils.getObjHeight( _div );
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if( !height )
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{
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return;
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}
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ips.utils.log("Determined height as " + height + ' for embed ID ' + _embedId );
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// If we HAVEN'T started posting our size
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if( !_posting ){
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if( height == currentSize ){
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repeats++;
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} else {
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// The height has changed, so reset our repeat counter
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repeats = 0;
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}
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if( repeats == 6 ){
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_posting = true;
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ips.utils.fadeIn( _div );
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_ro = new ResizeObserver((entries) => {
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for (const entry of entries) {
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if (entry.target === _div) {
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if (typeof entry.borderBoxSize?.[0]?.blockSize === 'number') {
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debouncePostMessage(entry.borderBoxSize[0].blockSize + 10);
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}
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break;
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}
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}
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});
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currentSize = height;
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_ro.observe(
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_div,
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{box: 'border-box'}
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);
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if( _posting ){
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_div.parentNode.className = '';
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// resize observers usually call the callback right when .observe() is called, but just in case we manually send the height if there hasn't been one
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setTimeout(() => {
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// still hasn't been called?
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if (debounceLastCall === 0) {
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const height = ips.utils.getObjHeight(_div);
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ips.utils.log("Determined height as " + height + ' for external embed ID ' + _embedId );
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_postMessage('height', {
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height: ( height + 10 )
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});
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// getting the height can force a reflow, so just double check it stil hasn't been called
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if (debounceLastCall === 0) {
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debounceLastCall = Date.now(); // do this outside the last call
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debouncePostMessage(height);
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}
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}
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}, _timeout);
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};
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}, 20);
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}
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/**
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* Posts a message to the iframe
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*
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* @param {number} [pageNo] Page number to load
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* @returns {void}
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*/
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var _postMessage = function (method, obj) {
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// Send to parent window
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window.top.postMessage( JSON.stringify( ips.utils.extendObj( obj || {}, {
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method: method,
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embedId: _embedId
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} ) ), _origin );
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window.top.postMessage(JSON.stringify( {...obj, method, embedId: _embedId}), _origin);
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};
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/**
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@@ -142,16 +137,16 @@
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* @param {object} data Data from the iframe
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* @returns {void}
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*/
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ready: function (data) {
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ready(data) {
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_embedId = data.embedId;
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_postMessage('ok');
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startTimeout();
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createResizeObserver();
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clearInterval( _failSafe ); // Stop our emergency timer
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},
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stop: function (data) {
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clearInterval( _timer );
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stop() {
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_ro?.disconnect();
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clearInterval( _failSafe ); // Stop our emergency timer
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eventHandler.off( window, 'message', windowMessage );
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}
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