Hi Peter,
we try to avoid browser/engine checks whenever possible, especially in
the environment detection classes, because they're fairly unreliable.
For example, IE 11 Preview no longer includes "IE" in its user agent
string, identifying itself as a Gecko-engined browser instead (even
though some Gecko-specific code will break it...). So relying on feature
detection, even if it means lots of try/catch blocks, is a good way to
future-proof the framework.
Besides, there are several other environment checks in qx.bom.client
that also throw and catch exceptions where we couldn't use an engine
switch even if we wanted to because it's not as straightforward as it is
with ActiveX.
Regards,
Daniel
On 09.10.2013 17:11, Peter Schneider wrote:
> Hi there,
>
> I was wondering why the check at qx.bom.client.Plugin.getActiveX() does not
> check for "mshtml" engine?
>
> The problem is, I am running on firefox with firebug and enable the
> "stop on all errors" option at the "Console" Tab.
> That -although caught- exception (see below) triggers a halt.
>
> Although I can deactivate that specific halt by deactivating it once it
> appeared, but what I really would like is that this does not happen at all.
>
> Couldn't the check (in the try block if getActiveX) include a check for IE?
> Like:
> <code>
> return qx.core.Environment.get("engine.name") == "mshtml" &&
> (typeof (new window.ActiveXObject("Microsoft.XMLHTTP")) === "object" ||
> typeof (new window.ActiveXObject("MSXML2.DOMDocument.6.0")) ===
> "object");
> <code>
>
> ...instead of the current:
>
> <code>
> return (typeof (new window.ActiveXObject("Microsoft.XMLHTTP")) === "object" ||
> typeof (new window.ActiveXObject("MSXML2.DOMDocument.6.0")) ===
> "object");
> <code>
>
> Or is "window.ActiveXObject" present/available/usable in any other client?
>
> See bug 7498[1] for further details.
>
> Regards & thanks in advance,
> Peter
>
>
> [1] http://bugzilla.qooxdoo.org/show_bug.cgi?id=7498
>
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