[Htmlunit-user] HELP: About the scope and DOM implementation of HtmlUnit

[Yuta T. <y.t...@gm...>]

Hi Team,

I am writing this e-mail for asking some questions about the scope
(e.g. variable and function definition) and DOM tree implementation of HtmlUnit.
Now, I would like to execute arbitrary JavaScript codes using the
clone (copy) of
original JavaScript scope and DOM tree information separately from
these of original.
I don't want to affect the original scope and DOM tree by executing
arbitrary JavaScript codes.

So, I tried to write/execute the following arbitrary codes with
HtmlUnit 2.13, but does not work well.
# cannot copy the information
cf. https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rhino/Scopes_and_Contexts

In addition, I tried to execute the following arbitrary JavaScript
codes in JavaScriptEngine.java
before READY_STATE_COMPLETE of HtmlPage.java.
// clone DOM tree
HtmlPage tempHtmlPage = htmlPage.clone(); // cannot clone the HtmlPage
HtmlPage tempHtmlPage = htmlPage.cloneNode(false); // cannot clone the HtmlPage
HtmlPage tempHtmlPage = htmlPage.cloneNode(true); // error at DomNode

// clone scope
Scriptable globalScope = getScope(htmlPage, null);
Context cx = ContextFactory.getGlobal().enterContext();
Scriptable localScope = cx.newObject(globalScope);
localScope.setPrototype(globalScope);
localScope.setParentScope(null);
// 'localScope' does not keep DOM tree information.
or
final SimpleScriptable tempScope = ((SimpleScriptable)
htmlPage.getScriptableObject()).clone();
// 'tempScope' is the same scope of original.

So, please tell me the way how to execute arbitrary JavaScript codes
using the clone
(copy) of scope and DOM information.
Looking forward to your help.

Regards,
Yuta