infer pdfjs document title from iframe url

www/common/pdfjs/web/viewer.js

@@ -341,25 +341,14 @@ function isDataSchema(url) {
   return url.substr(i, 5).toLowerCase() === 'data:';
 }
 function getPDFFileNameFromURL(url) {
-  var defaultFilename = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'document.pdf';
-
-  if (isDataSchema(url)) {
-    console.warn('getPDFFileNameFromURL: ' + 'ignoring "data:" URL for performance reasons.');
-    return defaultFilename;
-  }
-  var reURI = /^(?:(?:[^:]+:)?\/\/[^\/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
-  var reFilename = /[^\/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
-  var splitURI = reURI.exec(url);
-  var suggestedFilename = reFilename.exec(splitURI[1]) || reFilename.exec(splitURI[2]) || reFilename.exec(splitURI[3]);
-  if (suggestedFilename) {
-    suggestedFilename = suggestedFilename[0];
-    if (suggestedFilename.indexOf('%') !== -1) {
-      try {
-        suggestedFilename = reFilename.exec(decodeURIComponent(suggestedFilename))[0];
-      } catch (e) {}
-    }
+  var query;
+  var title;
+  if (/\?/.test(url)) {
+    url.replace(/\?(.*)$/, function (all, t) {
+      title = t;
+    });
   }
-  return suggestedFilename || defaultFilename;
+  return title || 'document.pdf';
 }
 function normalizeWheelEventDelta(evt) {
   var delta = Math.sqrt(evt.deltaX * evt.deltaX + evt.deltaY * evt.deltaY);
@@ -1192,11 +1181,13 @@ var PDFViewerApplication = {
   setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
     this.url = url;
     this.baseUrl = url.split('#')[0];
-    var title = (0, _ui_utils.getPDFFileNameFromURL)(url, '');
+
+    var title = _ui_utils.getPDFFileNameFromURL(url);
     if (!title) {
       try {
         title = decodeURIComponent((0, _pdfjsLib.getFilenameFromUrl)(url)) || url;
       } catch (e) {
+          console.error(e)
         title = url;
       }
     }