Nashorn webview issue

Wed Dec 9 12:40:10 UTC 2015

Which version of jjs are you using? (jjs -version)

— Jim

> On Dec 1, 2015, at 1:11 AM, Chris Root <hammer65 at gmail.com> wrote:
> 
> I'm trying to get two way communication working for a browser project in
> Nashorn and I'm having trouble implementing an HTML to host callback. I
> tried this in Java using setMember and it works perfectly, but I can't seem
> to duplicate it with Nashorn. Since using setMember didn't work I decided
> to use the approach below but still no luck.
> 
> I don't want to pick up objects from the window object, I want to plant a
> function in window that will call Nashorn code. Again getting this to work
> in Java was no problem. I followed the instructions on this page
> 
> https://blogs.oracle.com/nashorn/entry/porting_from_the_browser_to
> 
> I have the jsObject wrapper shown in the article and it works fine. but the
> code below doesn't work. This is the relevant snip from the load handler.
> 
> This.engine.loadWorker.stateProperty().addListener(new ChangeListener() {
>    changed: function(value, oldState, newState) {
>      switch(newState){
>        case Worker.State.SUCCEEDED:
>          This.document = wrap(This.engine.executeScript("document"));
>          This.window = wrap(This.engine.executeScript("window"));
>          This.window.hello = function(){
>            This.hello();
>          }
> 
> As you can see I planted a function on the window called hello, which calls
> a method of the webview wrapper (same wrapper as in the article) called
> hello()
> 
> This.hello = function(){
>  print("****** hello it worked *******");
> }
> 
> I then set up the alert handler
> 
> This.engine.onAlert = new javafx.event.EventHandler() {
>  handle: function(evt) {
>    print(evt.data)
>  }
> };
> 
> and then finally loaded the HTML file below into the webview.
> 
> <html>
> <head>
>  <title>Nashorn Browser</title>
> 
>  <script type="text/Javascript">
>    function sayhello(){
>      try{
>        hello();
>      }catch(e){
>        alert(e.message)
>      }
>    }
>  </script>
> 
> </head>
> <body>
>  <a href="#" onclick="sayhello(); return false;">Say Hello</a>
> </body>
> </html>
> 
> What I get back in the console is.
> 
> JavaRuntimeObject is not a function (evaluating 'window.hello()')
> 
> Is there any way to establish a callback into my Nashorn code the way it
> can be done in Java?