erp5_dms: PDF reader is very slow to open a large base64 encoded PDF embedded in…

… HTML or it fails to open such a large PDF. Thus, now PDF reader opens a PDF using URL. It is faster and stable.

/reviewed-on nexedi/erp5!468

bt5/erp5_dms/SkinTemplateItem/portal_skins/erp5_dms/PDF_viewPDFJSPreview/my_data.xml

@@ -50,6 +50,10 @@
             <key> <string>tales</string> </key>
             <value>
               <dictionary>
+                <item>
+                    <key> <string>data_url</string> </key>
+                    <value> <string></string> </value>
+                </item>
                 <item>
                     <key> <string>default</string> </key>
                     <value>
@@ -111,7 +115,7 @@
       <dictionary>
         <item>
             <key> <string>_text</string> </key>
-            <value> <string>python: context.getData().encode("base64")</string> </value>
+            <value> <string>python: context.absolute_url()+\'/getData\'</string> </value>
         </item>
       </dictionary>
     </pickle>

bt5/erp5_dms/SkinTemplateItem/portal_skins/erp5_dms/pdf_js/pdf.gadget.js.js

@@ -21,15 +21,7 @@
         window.document.head.removeChild(el);
       });
       this.props.key = options.key;
-      var raw = window.atob(options.value);
-      var rawLength = raw.length;
-      var array = new Uint8Array(new ArrayBuffer(rawLength));
-
-      for (var i = 0; i < rawLength; i++) {
-        array[i] = raw.charCodeAt(i);
-      }
-
-      webViewerLoad(array);
+      webViewerLoad(options.value);
 
       // hide few buttons for now
       this.props.element.querySelector('#viewBookmark').hidden = true;