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/**

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* PDFObject v2.2.6

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* https://github.com/pipwerks/PDFObject

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* @license

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* MIT-style license: http://pipwerks.mit-license.org/

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* UMD module pattern from https://github.com/umdjs/umd/blob/master/templates/returnExports.js

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(function (root, factory) {

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if (typeof define === "function" && define.amd) {

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// AMD. Register as an anonymous module.

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define([], factory);

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} else if (typeof module === "object" && module.exports) {

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// Node. Does not work with strict CommonJS, but

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// only CommonJS-like environments that support module.exports,

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// like Node.

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module.exports = factory();

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} else {

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// Browser globals (root is window)

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root.PDFObject = factory();

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}

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}(this, function () {

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"use strict";

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//PDFObject is designed for client-side (browsers), not server-side (node)

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//Will choke on undefined navigator and window vars when run on server

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//Return boolean false and exit function when running server-side

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if( typeof window === "undefined" ||

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window.navigator === undefined ||

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window.navigator.userAgent === undefined ||

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window.navigator.mimeTypes === undefined){

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return false;

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}

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let pdfobjectversion = "2.2.6";

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let nav = window.navigator;

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let ua = window.navigator.userAgent;

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//Time to jump through hoops -- browser vendors do not make it easy to detect PDF support.

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IE11 still uses ActiveX for Adobe Reader, but IE 11 doesn't expose window.ActiveXObject the same way

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previous versions of IE did. window.ActiveXObject will evaluate to false in IE 11, but "ActiveXObject"

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in window evaluates to true.

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MS Edge does not support ActiveX so this test will evaluate false

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let isIE = ("ActiveXObject" in window);

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There is a coincidental correlation between implementation of window.promises and native PDF support in desktop browsers

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We use this to assume if the browser supports promises it supports embedded PDFs

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Is this fragile? Sort of. But browser vendors removed mimetype detection, so we're left to improvise

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let isModernBrowser = (window.Promise !== undefined);

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//Older browsers still expose the mimeType

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let supportsPdfMimeType = (nav.mimeTypes["application/pdf"] !== undefined);

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//Safari on iPadOS doesn't report as 'mobile' when requesting desktop site, yet still fails to embed PDFs

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let isSafariIOSDesktopMode = ( nav.platform !== undefined &&

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nav.platform === "MacIntel" &&

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nav.maxTouchPoints !== undefined &&

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nav.maxTouchPoints > 1 );

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//Quick test for mobile devices.

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let isMobileDevice = (isSafariIOSDesktopMode || /Mobi|Tablet|Android|iPad|iPhone/.test(ua));

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//Safari desktop requires special handling

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let isSafariDesktop = ( !isMobileDevice &&

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nav.vendor !== undefined &&

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/Apple/.test(nav.vendor) &&

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/Safari/.test(ua) );

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//Firefox started shipping PDF.js in Firefox 19. If this is Firefox 19 or greater, assume PDF.js is available

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let isFirefoxWithPDFJS = (!isMobileDevice && /irefox/.test(ua) && ua.split("rv:").length > 1) ? (parseInt(ua.split("rv:")[1].split(".")[0], 10) > 18) : false;

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/* ----------------------------------------------------

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Supporting functions

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---------------------------------------------------- */

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let createAXO = function (type){

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var ax;

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try {

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ax = new ActiveXObject(type);

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} catch (e) {

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ax = null; //ensure ax remains null

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}

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return ax;

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};

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//If either ActiveX support for "AcroPDF.PDF" or "PDF.PdfCtrl" are found, return true

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//Constructed as a method (not a prop) to avoid unneccesarry overhead -- will only be evaluated if needed

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let supportsPdfActiveX = function (){ return !!(createAXO("AcroPDF.PDF") || createAXO("PDF.PdfCtrl")); };

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//Determines whether PDF support is available

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let supportsPDFs = (

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//As of Sept 2020 no mobile browsers properly support PDF embeds

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!isMobileDevice && (

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//We're moving into the age of MIME-less browsers. They mostly all support PDF rendering without plugins.

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isModernBrowser ||

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//Modern versions of Firefox come bundled with PDFJS

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isFirefoxWithPDFJS ||

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//Browsers that still support the original MIME type check

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supportsPdfMimeType ||

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//Pity the poor souls still using IE

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(isIE && supportsPdfActiveX())

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)

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);

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//Create a fragment identifier for using PDF Open parameters when embedding PDF

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let buildURLFragmentString = function(pdfParams){

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let string = "";

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let prop;

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if(pdfParams){

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for (prop in pdfParams) {

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if (pdfParams.hasOwnProperty(prop)) {

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string += encodeURIComponent(prop) + "=" + encodeURIComponent(pdfParams[prop]) + "&";

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}

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}

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//The string will be empty if no PDF Params found

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if(string){

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string = "#" + string;

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//Remove last ampersand

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string = string.slice(0, string.length - 1);

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}

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}

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return string;

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};

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let embedError = function (msg, suppressConsole){

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if(!suppressConsole){

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// console.log("[PDFObject] " + msg); //added by EP developer

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}

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return false;

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};

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let emptyNodeContents = function (node){

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while(node.firstChild){

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node.removeChild(node.firstChild);

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}

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};

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let getTargetElement = function (targetSelector){

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//Default to body for full-browser PDF

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let targetNode = document.body;

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//If a targetSelector is specified, check to see whether

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//it's passing a selector, jQuery object, or an HTML element

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if(typeof targetSelector === "string"){

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//Is CSS selector

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targetNode = document.querySelector(targetSelector);

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} else if (window.jQuery !== undefined && targetSelector instanceof jQuery && targetSelector.length) {

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//Is jQuery element. Extract HTML node

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targetNode = targetSelector.get(0);

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} else if (targetSelector.nodeType !== undefined && targetSelector.nodeType === 1){

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//Is HTML element

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targetNode = targetSelector;

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}

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return targetNode;

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};

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let generatePDFJSMarkup = function (targetNode, url, pdfOpenFragment, PDFJS_URL, id, omitInlineStyles){

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//Ensure target element is empty first

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emptyNodeContents(targetNode);

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let fullURL = PDFJS_URL + "?file=" + encodeURIComponent(url) + pdfOpenFragment;

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let div = document.createElement("div");

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let iframe = document.createElement("iframe");

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iframe.src = fullURL;

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iframe.className = "pdfobject";

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iframe.type = "application/pdf";

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iframe.frameborder = "0";

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iframe.allow = "fullscreen";

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if(id){

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iframe.id = id;

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}

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if(!omitInlineStyles){

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div.style.cssText = "position: absolute; top: 0; right: 0; bottom: 0; left: 0;";

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iframe.style.cssText = "border: none; width: 100%; height: 100%;";

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targetNode.style.position = "relative";

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targetNode.style.overflow = "auto";

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}

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div.appendChild(iframe);

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targetNode.appendChild(div);

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targetNode.classList.add("pdfobject-container");

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return targetNode.getElementsByTagName("iframe")[0];

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};

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let generatePDFObjectMarkup = function (embedType, targetNode, targetSelector, url, pdfOpenFragment, width, height, id, title, omitInlineStyles){

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//Ensure target element is empty first

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emptyNodeContents(targetNode);

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let embed = document.createElement(embedType);

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if ('object' === embedType ) {

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embed.data = url + pdfOpenFragment;

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}else{

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embed.src = url + pdfOpenFragment;

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}

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embed.className = "pdfobject";

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embed.type = "application/pdf";

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embed.title = title;

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if(id){

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embed.id = id;

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}

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if(embedType === "iframe"){

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embed.allow = "fullscreen";

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}

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if(!omitInlineStyles){

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let style = (embedType === "embed") ? "overflow: auto;" : "border: none;";

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if(targetSelector && targetSelector !== document.body){

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style += "width: " + width + "; height: " + height + ";";

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} else {

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style += "position: absolute; top: 0; right: 0; bottom: 0; left: 0; width: 100%; height: 100%;";

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}

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embed.style.cssText = style;

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}

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targetNode.classList.add("pdfobject-container");

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targetNode.appendChild(embed);

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return targetNode.getElementsByTagName(embedType)[0];

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};

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let embed = function(url, targetSelector, options){

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//If targetSelector is not defined, convert to boolean

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let selector = targetSelector || false;

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//Ensure options object is not undefined -- enables easier error checking below

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let opt = options || {};

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//Get passed options, or set reasonable defaults

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let id = (typeof opt.id === "string") ? opt.id : "";

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let page = opt.page || false;

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let pdfOpenParams = opt.pdfOpenParams || {};

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let fallbackLink = opt.fallbackLink || true;

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let width = opt.width || "100%";

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let height = opt.height || "100%";

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let title = opt.title || "Embedded PDF";

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let assumptionMode = (typeof opt.assumptionMode === "boolean") ? opt.assumptionMode : true;

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let forcePDFJS = (typeof opt.forcePDFJS === "boolean") ? opt.forcePDFJS : false;

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let supportRedirect = (typeof opt.supportRedirect === "boolean") ? opt.supportRedirect : false;

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let omitInlineStyles = (typeof opt.omitInlineStyles === "boolean") ? opt.omitInlineStyles : false;

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let suppressConsole = (typeof opt.suppressConsole === "boolean") ? opt.suppressConsole : false;

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let forceIframe = (typeof opt.forceIframe === "boolean") ? opt.forceIframe : false;

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let forceObject = (typeof opt.forceObject === "boolean") ? opt.forceObject : false;

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let PDFJS_URL = opt.PDFJS_URL || false;

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let targetNode = getTargetElement(selector);

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let fallbackHTML = "";

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let pdfOpenFragment = "";

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let fallbackHTML_default = "<p>This browser does not support inline PDFs. Please download the PDF to view it: <a href='[url]'>Download PDF</a></p>";

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//Ensure URL is available. If not, exit now.

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if(typeof url !== "string"){ return embedError("URL is not valid", suppressConsole); }

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//If target element is specified but is not valid, exit without doing anything

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if(!targetNode){ return embedError("Target element cannot be determined", suppressConsole); }

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//page option overrides pdfOpenParams, if found

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if(page){ pdfOpenParams.page = page; }

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//Stringify optional Adobe params for opening document (as fragment identifier)

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pdfOpenFragment = buildURLFragmentString(pdfOpenParams);

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// --== Do the dance: Embed attempt #1 ==--

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//If the forcePDFJS option is invoked, skip everything else and embed as directed

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if(forcePDFJS && PDFJS_URL){

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return generatePDFJSMarkup(targetNode, url, pdfOpenFragment, PDFJS_URL, id, omitInlineStyles);

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}

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// --== Embed attempt #2 ==--

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//Embed PDF if traditional support is provided, or if this developer is willing to roll with assumption

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//that modern desktop (not mobile) browsers natively support PDFs

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if(supportsPDFs || (assumptionMode && !isMobileDevice)){

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//Should we use <embed> or <iframe>? In most cases <embed>.

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//Allow developer to force <iframe>, if desired

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//There is an edge case where Safari does not respect 302 redirect requests for PDF files when using <embed> element.

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//Redirect appears to work fine when using <iframe> instead of <embed> (Addresses issue #210)

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//Forcing Safari desktop to use iframe due to freezing bug in macOS 11 (Big Sur)

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let embedtype = (forceIframe || supportRedirect || isSafariDesktop) ? "iframe" : (forceObject ? "object" : "embed");

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return generatePDFObjectMarkup(embedtype, targetNode, targetSelector, url, pdfOpenFragment, width, height, id, title, omitInlineStyles);

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}

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// --== Embed attempt #3 ==--

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//If everything else has failed and a PDFJS fallback is provided, try to use it

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if(PDFJS_URL){

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return generatePDFJSMarkup(targetNode, url, pdfOpenFragment, PDFJS_URL, id, omitInlineStyles);

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}

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// --== PDF embed not supported! Use fallback ==--

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//Display the fallback link if available

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if(fallbackLink){

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fallbackHTML = (typeof fallbackLink === "string") ? fallbackLink : fallbackHTML_default;

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targetNode.innerHTML = fallbackHTML.replace(/\[url\]/g, url);

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}

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return embedError("This browser does not support embedded PDFs", suppressConsole);

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};

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return {

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embed: function (a,b,c){ return embed(a,b,c); },

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pdfobjectversion: (function () { return pdfobjectversion; })(),

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supportsPDFs: (function (){ return supportsPDFs; })()

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};

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}));

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