[bt-devel] Problem with Mag window not working is fixed.

[Jaak Ristioja]

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Hi!

Yes, we should release at least one other 2.8.#. I'm not sure whether
changing the requirement from Qt 4.5 to 4.6 would be a good idea for
2.9.# right now. For later versions, it is no problem. What version of
Qt does Ubuntu 10.04 (LTS) have?

Blessings,
Jaak

On 14.11.2011 09:40, Martin Gruner wrote:
> Hi Gary,
> 
> very cool!
> AFAIR, we currently require Qt 4.5, where such a "proxy" class is needed
> to create a bridge between C++ and JS. With Qt 4.6, this is not required
> any more. So if we decide to up the version, the code could be changed
> and simplified.
> 
> Regards, mg
> 
> Am 14.11.11 06:17, schrieb Gary Holmlund:
>>
>> I fixed the problem with the Mag window not working with newer
>> versions of Qt (Qt 4.7.4 + QtWebKit 2.2 or later). The current version
>> shipping with Ubuntu 11.10 and Fedora 16 is broken because of this
>> issue. I know that we will soon release 2.9,  but Ubuntu has been
>> reluctant to upgrade to feature releases. I am wondering if we should
>> create a 2.8.3 for this fix.
>>
>>
>> Bug details
>>
>> Each BibleTime window uses Qt WebKit classes to display the page. We
>> use javascript on the page to associate the mouse coordinates with DOM
>> elements and display the corresponding entry in the Mag window. The
>> javascript also handles drag/drop and a few other things.
>>
>> There is a c++ class (BtHtmlJsObject) that is associated with the
>> javascript on a page in BibleTime. This class allows c++ to call
>> javascript and javascript to call c++. With the latest versions of Qt
>> both the class instance and the javascript have a "security origin".
>> The first time the class instance is associated with the javascript
>> everything is ok. But when the next page with javascript is loaded
>> into the window and associated with the same class instance, they have
>> different security origins. WebKit is checking this and throwing an
>> cross site scripting error. The javascript does not run correctly.
>>
>> It took a lot of debugging down into Qt to figure this out. Once I
>> knew the issue I suspected I could fix it by associating a new class
>> instance with the javascript each time the page is reloaded. This
>> fixed the problem.
>>
>> Gary
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