Make Papaya Javascript DICOM viewer work in JavaFX WebView

When loading Papaya Javascript DICOM/NIFTI Viewer in a JavaFX WebView, it failed with error message:

Papaya requires Safari version 6 or higher.

So I checked WebKit version of JavaFX 8 using the following code:

WebView web = new WebView();
System.out.println(web.getEngine().getUserAgent());

it shows the JavaFX 8 WebKit UserAgent information:

Mozilla/5.0 (Macintosh; Intel Mac OS X) AppleWebKit/538.19 (KHTML, like Gecko) JavaFX/8.0 Safari/538.19

According to Safari version history, Safari 6.0 is based on WebKit 536.25, while Webkit in JavaFX 8 is 538.19. WebKit in JavaFX 8 is above Safari 6.0. The problem is the browser detection in Papaya could not detect the version. So the work around is to modify the Papaya source code to accept JavaFX 8 WebKit agent.

1. Check out Papaya js:

   git clone https://github.com/rii-mango/Papaya.git

2. Edit src/js/utilities/platform-utils.js, insert the following code:

   papaya.utilities.PlatformUtils.checkForBrowserCompatibility = function () {
       if (navigator.userAgent.indexOf('JavaFX')>=0) {
           return null;
       }
      ... ... ...
   }
   

3. Download and build Papaya-builder, then install it into Papaya/lib/:

   git clone https://github.com/rii-mango/Papaya-Builder.git
   cd Papaya-Builder
   ant
   cp build/papaya-builder.jar ../Papaya/lib/
   

4. Build Papaya:

   cd Papaya
   ./papaya-builder.sh
   ls build/