Thanks for the reply, i stil have some questions though:

1) Are XPCOM componentes accessible through javascript?

2) Do any new JS modules or XPCOM components need to be integrated at build
time or are they loaded at run-time (dll/dylib/so)?

3) Regarding 4), i'm aware the mozilla supports multi-touch events. What
i'm trying to accomplish is to hook the events from a touch screen driver
on the desktop to the mechanism which launches the touch events. Do i need
to alter the mozilla source code to enable this or can it be achieved with
a XPCOM component?

Regards,

Leander

On Mon, Jan 9, 2012 at 4:50 PM, Benjamin Smedberg <benja...@smedbergs.us>wrote:

> On 1/9/2012 6:34 AM, Leander Bessa wrote:
>
>>
>> I'm trying to build an application which'll use html5 and css3 to
>> display its interface and a set of C++ apis to introduce features
>> beyond the scope of html.
>>
> It sounds like you really want XULRunner, not "embedding" in the
> traditional sense. You can write XULRunner apps using HTML (instead of
> XUL), and this is actually recommended because it will insulate you from
> any changes we might make to the (unstable) XUL language itself. And most
> of the special features you need can be implemented as JS modules or XPCOM
> components.
>
>  1) Does embedding gecko only give me access to the html renderer or
>> does it also include the javascript engine?
>>
> Our platform is a complete platform including layout, JS, networking, and
> pretty much everything else you need for a complete web experience.
>
>
>> 2) Regarding the new embed api with Qt, how does gecko render html?
>> Does it use cairo's or Qt's api? This aspect is important, since
>> rendering performance is a must.
>>
> I can't answer this question because I don't know what embed API you're
> discussing.
>
>
>> 3) How easy is it to make my c++ apis available to the javascript
>> context? In the case of the Qt port, can i use QObject derived classes
>> such as in QtWebkit?
>>
> No, you cannot. Typically you interface with C++ code using either XPCOM
> interfaces declared in XPIDL, or by writing a glue layer in JavaScript and
> using JS-ctypes. XPCOM is more powerful but you may need to update or
> recompile your code for each release cycle. JS-ctypes is more stable
> although it may require additional work and care to get the interface
> right, especially if you have complex callback mechanisms.
>
>
>> 4) How difficult is it to extend/alter Gecko?  For instance: adding a c
>> ++ scene graph to the canvas layer or hooking up a driver to support
>> muti-touch input with a touch screen on a desktop pc?
>>
> Assuming that you can't just translate your scene graph to SVG or some web
> technology, the best way to implement something like that would probably be
> as an NPAPI plugin.
>
> Gecko already supports multi-touch input natively using DOM events, so
> that probably doesn't require any additional code on your part except for
> JS to react to the multitouch events.
>
> --BDS
>
>
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