Fix the js error in IE9 when displaying PDF. Bug 1400595

Change-Id: Iaa1ef43f30615c253df28c70d20db415779146b8
Signed-off-by: Son Nguyen <son.nguyen@catalyst.net.nz>

htdocs/artefact/file/blocktype/pdf/js/pdfjs/README.Mahara

@@ -20,7 +20,7 @@ Changes:
 
 * Minify js files for faster loading
 * Change location of sample PDF file
-* Remove "open file" button
+* Hide the "open file" button in the toolbar
 * viewer.css additions to support viewing by non-JS users
 * viewer.css tweak to get the bottom of the display to show
 * viewer.css tweak to avoid horizontal scrollbar on default 3-column page layout

htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.css

@@ -1062,6 +1062,12 @@ html[dir='rtl'] .toolbarButton.pageDown::before {
   content: url(images/toolbarButton-print.png);
 }
 
+# Hide the 'Open File' button in the tool bar
+.toolbarButton.openFile,
+.secondaryToolbarButton.openFile {
+  display: none;
+}
+
 .toolbarButton.openFile::before,
 .secondaryToolbarButton.openFile::before {
   content: url(images/toolbarButton-openFile.png);

htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.js

@@ -6400,8 +6400,8 @@ function webViewerInitialized() {
   document.getElementById('presentationMode').addEventListener('click',
     SecondaryToolbar.presentationModeClick.bind(SecondaryToolbar));
 
-//  document.getElementById('openFile').addEventListener('click',
-//    SecondaryToolbar.openFileClick.bind(SecondaryToolbar));
+  document.getElementById('openFile').addEventListener('click',
+    SecondaryToolbar.openFileClick.bind(SecondaryToolbar));
 
   document.getElementById('print').addEventListener('click',
     SecondaryToolbar.printClick.bind(SecondaryToolbar));

htdocs/theme/raw/artefact/file/blocktype/pdf/templates/pdf.tpl

@@ -84,11 +84,9 @@
               <span data-l10n-id="presentation_mode_label">Presentation Mode</span>
             </button>
 
-<!--
             <button id="secondaryOpenFile" class="secondaryToolbarButton openFile visibleLargeView" title="Open File" tabindex="52" data-l10n-id="open_file">
               <span data-l10n-id="open_file_label">Open</span>
             </button>
--->
 
             <button id="secondaryPrint" class="secondaryToolbarButton print visibleMediumView" title="Print" tabindex="53" data-l10n-id="print">
               <span data-l10n-id="print_label">Print</span>
@@ -162,11 +160,11 @@
                 <button id="presentationMode" class="toolbarButton presentationMode hiddenLargeView" title="Switch to Presentation Mode" tabindex="31" data-l10n-id="presentation_mode">
                   <span data-l10n-id="presentation_mode_label">Presentation Mode</span>
                 </button>
-<!--
+
                 <button id="openFile" class="toolbarButton openFile hiddenLargeView" title="Open File" tabindex="32" data-l10n-id="open_file">
                   <span data-l10n-id="open_file_label">Open</span>
                 </button>
--->
+
                 <button id="print" class="toolbarButton print hiddenMediumView" title="Print" tabindex="33" data-l10n-id="print">
                   <span data-l10n-id="print_label">Print</span>
                 </button>