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Bug 332733 - Browser.evaluate always returns NULL on Win7 and SWT 3.6.1
Summary: Browser.evaluate always returns NULL on Win7 and SWT 3.6.1
Status: RESOLVED NOT_ECLIPSE
Alias: None
Product: Platform
Classification: Eclipse Project
Component: SWT (show other bugs)
Version: 3.6.1   Edit
Hardware: PC Windows 7
: P3 normal (vote)
Target Milestone: ---   Edit
Assignee: Grant Gayed CLA
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Reported: 2010-12-16 08:24 EST by Luca Viggiani CLA
Modified: 2010-12-16 10:56 EST (History)
2 users (show)

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Description Luca Viggiani CLA 2010-12-16 08:24:28 EST 
Build Identifier: Helios

Please consider this snippet

Browser browser = new Browser (shell, SWT.NONE); // Uses Mozilla on Linux, WebKit on OSX and IE on Win
System.out.println(browser.evaluate("return 2+2;");

it returns 4 on both Linux and OSX (any arch with SWT 3.6.1), but NULL on Win7 (I only tested on 32bit version with SWT 3.6.1)

Reproducible: Always

Steps to Reproduce:
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Comment 1 Luca Viggiani CLA 2010-12-16 10:11:26 EST 
I've found where the problem is... it behaves the same in XP with SWT 3.5.
You've to set an url before calling the evaluate method:

browser.setUrl("about:blank");
System.out.println(browser.evaluate("return 2;")); // prints 2.0

I'm not sure it is actually a bug, however it behaves differently from Mozilla or WebKit. But I guess it's IE not SWT.