Examples of netscape.javascript.JSObject

netscape.javascript.JSObject
JSObject allows Java to manipulate objects that are defined in JavaScript. Values passed from Java to JavaScript are converted as follows:
- JSObject is converted to the original JavaScript object
- Any other Java object is converted to a JavaScript wrapper, which can be used to access methods and fields of the java object. Converting this wrapper to a string will call the toString method on the original object, converting to a number will call the doubleValue method if possible and fail otherwise. Converting to a boolean will try to call the booleanValue method in the same way.
- Java arrays are wrapped with a JavaScript object that understands array.length and array[index]
- A Java boolean is converted to a JavaScript boolean
- Java byte, char, short, int, long, float, and double are converted to JavaScript numbers
Values passed from JavaScript to Java are converted as follows:
- objects which are wrappers around java objects are unwrapped
- other objects are wrapped with a JSObject
- strings, numbers and booleans are converted to String, Double, and Boolean objects respectively
This means that all JavaScript values show up as some kind of java.lang.Object in Java. In order to make much use of them, you will have to cast them to the appropriate subclass of Object, e.g. (String) window.getMember("name"); or (JSObject) window.getMember("document");.

    super(element, data, dataPath);


                                // fill the optionList value with the various
    optionList = new Vector();  // OPTIONs that are a part of this SELECT tag.
    formOptions = (JSObject) element.getMember("options");
    JSObject option;
    int numOptions = NSFieldManager.intValue(formOptions.getMember("length"));
    for (int optIdx = 0;   optIdx < numOptions;   optIdx++)
      optionList.addElement(getOptionValue(formOptions, optIdx));


    if (variantValue != null) paint();

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    return (String) optionList.elementAt(idx);
  }


  private static String getOptionValue(JSObject formOptions, int idx) {
    JSObject option = (JSObject) formOptions.getSlot(idx);
    String result = (String) option.getMember("value");
    if (result == null || result.trim().length() == 0) {
      result = (String) option.getMember("text");
      if (result != null) result = result.trim();
    }


    return result;
  }

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        if (applicationHostApplet == null) {
            throw new IllegalArgumentException("No applet is hosting the given application.");
        }


        try {
            JSObject window = JSObject.getWindow(applicationHostApplet);
            return window.eval(script);
        } catch (Throwable throwable) {
            throw new UnsupportedOperationException(throwable);
        }
    }

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        setWeight(weight);
    }


    // calls the setWeight(weight) JavaScript function on the current page
    private void setWeight(String weight) {
        JSObject win = JSObject.getWindow(this);
        String[] args = { weight };
        win.call("setWeight", args);
    }

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     */
    JSObject getJSNamespace()
    {
        try
        {
            final JSObject window = JSObject.getWindow(this);
            final JSObject namespace = (JSObject) window.getMember("midi4js");
            return namespace;
        }
        catch (final Exception e)
        {
            System.err.println("Unable to get midi4js JavaScript " +

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     *            Optional arguments.
     */
    void execJSMethod(final String methodName, final Object... arguments)
    {
        // Get the JavaScript midi4js namespace. Do nothing if not found.
        final JSObject namespace = getJSNamespace();
        if (namespace == null) return;


        try
        {
            namespace.call(methodName, arguments);
        }
        catch (final Exception e)
        {
            System.err.println("Unable to call method '" + methodName + "' " +
                "on midi4js namespace. Original exception: ");

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     * Executed when all uploads are finished so if you want to do something
     * when all files are uplaoded you can do it in javascript (no data about
     * file uploads is passed !)
     */
    private void uploadProcessFinished() {
        JSObject jso = (JSObject) this.configHolder.getObject("global.jso");
        try {
            jso.call("JUP_eventhandler", new String[]{"uploadfinished"});
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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     * with this function we call javascript's "relocate" function, relocate
     * function accepts two parameter first is action which are "gofolder" or
     * "again" and second is "target folder id"
     */
    public void doAfterUploadProcess() {
        JSObject jso = (JSObject) this.configHolder.getObject("global.jso");
        try {
            jso.call("JUP_eventhandler", new String[]{"gofolder", targetID});
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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            e.printStackTrace();
        }
    }


    private void uploadAgain() {
        JSObject jso = (JSObject) this.configHolder.getObject("global.jso");
        try {
            jso.call("JUP_eventhandler", new String[]{"again", targetID});
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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    /**
     * Executed to indicate javascript event handler
     */
    private void raiseAppletDeniedEvent() {
        JSObject jso = (JSObject) this.configHolder.getObject("global.jso");
        try {
            jso.call("JUP_eventhandler", new String[]{"appletdenied"});
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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