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Re: [eclipse-incubator-e4-dev] CSS namespaces


I'm not sure why we'd want to write our own SAC parser. Its a lot of work and there are clearly existing technologies which, while maybe not perfect fits, are better than starting from scratch.  

I'd much rather work with an existing community supporting Flute or Batik (assuming such communities exist, the Flute files are all 2002 so not clear if its dead code or not).  Just as with Eclipse, you see if the community is open to making the changes you need. If they are, you help make those changes.  This gets you the technology you need, and meanwhile furthers that community.  Everyone wins!  And its a very efficient use of developer resources which are always scarse.  I'd rather spend those cycles doing something more specific to Eclipse (like nice style sheets, like a UI model, etc.).

Regards,
Kevin




"向雅" <fyaoxy@xxxxxxxxx>
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08/08/2008 05:30 PM

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Re: [eclipse-incubator-e4-dev] CSS namespaces





Yes, and maybe not only a parser.

SWT burden lots of legacy, which I not known about, and nice to hear details.

2008/8/9 Kevin McGuire <Kevin_McGuire@xxxxxxxxxx>:
>
> Thanks for moving the comment to this thread.  I still don't understand what
> you are saying though :)
>
> Do you mean we should implement a CSS parser from scratch rather than use
> batik or flute?
>
> Also not sure about your comment on SWT.  It has lots of legagy burden,
> Steve will tell you!
>
> Regards,
> Kevin
>
>
>
>
>
> "向雅" <fyaoxy@xxxxxxxxx>
> Sent by: eclipse-incubator-e4-dev-bounces@xxxxxxxxxxx
>
> 08/08/2008 12:56 PM
>
> Please respond to
> E4 developer list <eclipse-incubator-e4-dev@xxxxxxxxxxx>
> To
> "E4 developer list" <eclipse-incubator-e4-dev@xxxxxxxxxxx>
> cc
> Subject
> Re: [eclipse-incubator-e4-dev] CSS namespaces
>
>
>
>
> Since the current CSS shoes not fit our feet, why not consider a fully new
> CSS?
>
> And SWT has not any legacy burden and weight.
>
>
> 2008/8/9 Kevin McGuire <Kevin_McGuire@xxxxxxxxxx>:
>>
>>> Hi,
>>>
>>> Angelo brought up CSS namespaces, I think this is an important topic
>>> that hasn't been discussed here yet.
>>
>> Sigh... yes.
>>
>>> The question is how to specify
>>> custom widget types in CSS. With SWT, the widget names are unambiguous,
>>> but custom widgets can involve name collisions.
>>>
>>> Using CSS namespaces would be an option, although I would then opt for
>>> using a default namespace for SWT to avoid clutter. The CSS could look
>>> like this:
>>>
>>>    @namespace "org.eclipse.swt.widgets";
>>>    @namespace my "my.name.space";
>>>
>>>    Label {
>>>      color;red;
>>>    }
>>>
>>>    my|Label {
>>>      color;red;
>>>    }
>>>
>>> On the other hand, some frequently used SWT widgets live in
>>> "org.eclipse.swt.custom" (CLabel, CCombo, CTabFolder, ...), so those
>>> would have to be prefixed as well (which I somehow dislike):
>>>
>>>    swtcustom|CLabel {
>>>      color: blue;
>>>    }
>>
>> Agree, I dislike it too. It's annoying to clutter the typical case (SWT
>> widgets, regardless of whether they are custom or not).
>>
>>> Moreover, CSS 3 is not yet widely adopted and the available parsers do
>>> not support it out-of-the-box.
>>
>> Good point.
>>
>>> An alternative to CSS namespaces could be some kind of mapping between
>>> widget classes and CSS element names.
>>
>> I think this is a reasonable approach. Extended widgets outside of SWT
>> would
>> need some form of qualified name, not so much to prevent clashing with SWT
>> since presumably everyone avoids that, but to prevent clashing with each
>> other.  The element names can be whatever we want them to be, since its
>> our
>> code that'll do the mapping from CSS to widget method calls.  So we could
>> solve it without resorting to CSS name spaces, for example by requiring
>> that
>> extended widgets register their names with us in some qualified fashion
>> (e.g. NebulaGallery).  Kinda hacky but would work.
>>
>> Kevin
>>
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>>
>
>
>
> --
> 致敬
> 向雅
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致敬
向雅
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