#19695#note-1 integrated with Google Docs Viewer as first version
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/*global ActiveXObject, window, console, define, module, jQuery */
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//jshint unused:false, strict: false
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/*
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PDFObject v2.1.1
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https://github.com/pipwerks/PDFObject
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Copyright (c) 2008-2018 Philip Hutchison
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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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*/
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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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//jshint unused:true
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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" || typeof navigator === "undefined"){ return false; }
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var pdfobjectversion = "2.1.1",
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ua = window.navigator.userAgent,
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//declare booleans
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supportsPDFs,
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isIE,
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supportsPdfMimeType = (typeof navigator.mimeTypes['application/pdf'] !== "undefined"),
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supportsPdfActiveX,
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isModernBrowser = (function (){ return (typeof window.Promise !== "undefined"); })(),
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isFirefox = (function (){ return (ua.indexOf("irefox") !== -1); } )(),
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isFirefoxWithPDFJS = (function (){
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//Firefox started shipping PDF.js in Firefox 19.
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//If this is Firefox 19 or greater, assume PDF.js is available
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if(!isFirefox){ return false; }
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//parse userAgent string to get release version ("rv")
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//ex: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:57.0) Gecko/20100101 Firefox/57.0
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return (parseInt(ua.split("rv:")[1].split(".")[0], 10) > 18);
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})(),
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isIOS = (function (){ return (/iphone|ipad|ipod/i.test(ua.toLowerCase())); })(),
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//declare functions
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createAXO,
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buildFragmentString,
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log,
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embedError,
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embed,
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getTargetElement,
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generatePDFJSiframe,
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generateEmbedElement;
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/* ----------------------------------------------------
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Supporting functions
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---------------------------------------------------- */
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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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//IE11 still uses ActiveX for Adobe Reader, but IE 11 doesn't expose
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//window.ActiveXObject the same way previous versions of IE did
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//window.ActiveXObject will evaluate to false in IE 11, but "ActiveXObject" in window evaluates to true
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//so check the first one for older IE, and the second for IE11
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//FWIW, MS Edge (replacing IE11) does not support ActiveX at all, both will evaluate false
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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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isIE = function (){ return !!(window.ActiveXObject || "ActiveXObject" in window); };
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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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supportsPdfActiveX = function (){ return !!(createAXO("AcroPDF.PDF") || createAXO("PDF.PdfCtrl")); };
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//Determines whether PDF support is available
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supportsPDFs = (
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//as of iOS 12, inline PDF rendering is still not supported in Safari or native webview
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//3rd-party browsers (eg Chrome, Firefox) use Apple's webview for rendering, and thus the same result as Safari
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//Therefore if iOS, we shall assume that PDF support is not available
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!isIOS && (
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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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);
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//Create a fragment identifier for using PDF Open parameters when embedding PDF
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buildFragmentString = function(pdfParams){
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var string = "",
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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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log = function (msg){
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if(typeof console !== "undefined" && console.log){
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console.log("[PDFObject] " + msg);
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}
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};
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embedError = function (msg){
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log(msg);
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return false;
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};
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getTargetElement = function (targetSelector){
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//Default to body for full-browser PDF
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var 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 (typeof 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 (typeof 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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generatePDFJSiframe = function (targetNode, url, pdfOpenFragment, PDFJS_URL, id){
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var fullURL = PDFJS_URL + "?file=" + encodeURIComponent(url) + pdfOpenFragment;
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var scrollfix = (isIOS) ? "-webkit-overflow-scrolling: touch; overflow-y: scroll; " : "overflow: hidden; ";
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var iframe = "<div style='" + scrollfix + "position: absolute; top: 0; right: 0; bottom: 0; left: 0;'><iframe " + id + " src='" + fullURL + "' style='border: none; width: 100%; height: 100%;' frameborder='0'></iframe></div>";
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targetNode.className += " pdfobject-container";
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targetNode.style.position = "relative";
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targetNode.style.overflow = "auto";
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targetNode.innerHTML = iframe;
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return targetNode.getElementsByTagName("iframe")[0];
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};
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generateEmbedElement = function (targetNode, targetSelector, url, pdfOpenFragment, width, height, id){
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var style = "";
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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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targetNode.className += " pdfobject-container";
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targetNode.innerHTML = "<embed " + id + " class='pdfobject' src='" + url + pdfOpenFragment + "' type='application/pdf' style='overflow: auto; " + style + "'/>";
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return targetNode.getElementsByTagName("embed")[0];
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};
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embed = function(url, targetSelector, options){
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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"); }
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//If targetSelector is not defined, convert to boolean
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targetSelector = (typeof targetSelector !== "undefined") ? targetSelector : false;
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//Ensure options object is not undefined -- enables easier error checking below
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options = (typeof options !== "undefined") ? options : {};
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//Get passed options, or set reasonable defaults
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var id = (options.id && typeof options.id === "string") ? "id='" + options.id + "'" : "",
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page = (options.page) ? options.page : false,
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pdfOpenParams = (options.pdfOpenParams) ? options.pdfOpenParams : {},
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fallbackLink = (typeof options.fallbackLink !== "undefined") ? options.fallbackLink : true,
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width = (options.width) ? options.width : "100%",
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height = (options.height) ? options.height : "100%",
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assumptionMode = (typeof options.assumptionMode === "boolean") ? options.assumptionMode : true,
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forcePDFJS = (typeof options.forcePDFJS === "boolean") ? options.forcePDFJS : false,
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PDFJS_URL = (options.PDFJS_URL) ? options.PDFJS_URL : false,
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targetNode = getTargetElement(targetSelector),
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fallbackHTML = "",
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pdfOpenFragment = "",
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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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//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"); }
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//page option overrides pdfOpenParams, if found
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if(page){
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pdfOpenParams.page = page;
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}
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//Stringify optional Adobe params for opening document (as fragment identifier)
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pdfOpenFragment = buildFragmentString(pdfOpenParams);
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//Do the dance
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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 generatePDFJSiframe(targetNode, url, pdfOpenFragment, PDFJS_URL, id);
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//If traditional support is provided, or if this is a modern browser and not iOS (see comment for supportsPDFs declaration)
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} else if(supportsPDFs || (assumptionMode && isModernBrowser && !isIOS)){
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return generateEmbedElement(targetNode, targetSelector, url, pdfOpenFragment, width, height, id);
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//If everything else has failed and a PDFJS fallback is provided, try to use it
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} else if(PDFJS_URL){
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return generatePDFJSiframe(targetNode, url, pdfOpenFragment, PDFJS_URL, id);
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} else {
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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");
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}
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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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