Subj : Rhino - EcmaError not showing line-number (only within small-footprint applet)
To   : netscape.public.mozilla.jseng
From : ariel_ml@netvision.net.il (Ariel Malka)
Date : Mon Aug 25 2003 04:00 pm

I made a minimal "execution-notepad" applet that would run multi-line
scripts (see code below).

Running within eclipse (Applet Viewer + "java.security.AllPermission"
+ full js.jar): when an error is encountered, EcmaError is showing a
line number as intended.

Now, when running within explorer (Sun JRE + small-footprint js.jar):
for the same error as before, EcmaError is not showing a line number!

Any clues? Thanks!


import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import org.mozilla.javascript.*;

public class Shell3 extends Applet
{
  private TextArea codeBox;
  private Button buttonRun;

  private Context cx;
  private Scriptable scope;

  public void init()
  {
    setLayout(new BorderLayout());
    codeBox = new TextArea();

    buttonRun = new Button("Run");
    buttonRun.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent evt)
      {
        evaluate(codeBox.getText());
      }
    });

    add(codeBox, BorderLayout.CENTER);
    add(buttonRun, BorderLayout.SOUTH);
  }

  public void evaluate(String command)
  {
    try
    {
      cx = Context.enter();
      scope = cx.initStandardObjects(null);

      Object result = cx.evaluateString(scope, command, "<cmd>", 1,
null);
      System.out.println(Context.toString(result));
    }
    catch(JavaScriptException jse) {}
    catch(EcmaError ee)
    {
      System.out.println(ee);
      System.out.println("AT LINE: " + ee.getLineNumber());
    }
    finally
    {
      Context.exit();
      System.gc();
    }
  }
}

.