[Qt-creator] Question about "kate/ktexteditor" highlighting implementation in QtCreator

[David Schulz]

Hi,

After a first look it seems that the transition to the KSyntaxHighlighter should be pretty straight forward, just some minor adjustments to the state handling. So let's wait for any kind of licensing decision and we are good to go.

Greetings 
David

-----Original Message-----
From: Qt-creator <qt-creator-bounces+david.schulz=qt.io at qt-project.org> On Behalf Of David Schulz
Sent: Friday, August 17, 2018 13:25
To: qt-creator <qt-creator at qt-project.org>
Subject: Re: [Qt-creator] Question about "kate/ktexteditor" highlighting implementation in QtCreator

> It would be great if some QtCreator developer could take a short look at what the framework provides and if it is usable for their purpose.

I'll check the new engine soonish 😉

Greetings
David

-----Original Message-----
From: Qt-creator <qt-creator-bounces+david.schulz=qt.io at qt-project.org> On Behalf Of Dr.-Ing. Christoph Cullmann
Sent: Tuesday, August 14, 2018 18:57
To: Lars Knoll <lars.knoll at qt.io>
Cc: Volker Krause <vkrause at kde.org>; qt-creator <qt-creator at qt-project.org>
Subject: Re: [Qt-creator] Question about "kate/ktexteditor" highlighting implementation in QtCreator

Hi,
 
>>>> Would it be possible to reuse the framework above to stay 
>>>> compatible and share code/maintenance effort?
>>> 
>>> That would be desirable goal :)
>> I hoped some, too.
> 
> Sharing that code would IMO be great. I don't see why we should 
> maintain our own code for parsing those syntax highlighter definitions
> :)

Nice that we share that point of view, as during the discussion today here at Akademy.

>>>> At the moment the framework is LGPLv2+, but even relicensing to 
>>>> something more liberal is at the moment still possible, if that 
>>>> would allow better collaboration.
>>> 
>>> Thanks for contacting us on that question! I’ve added Lars as our 
>>> Chief Maintainer to CC.
>> I added the maintainer of syntax-highlighting Volker Krause in CC.
>> Actually both are at akademy at the moment and perhaps can just talk 
>> about the thing in person if wanted.
> 
> We had a good talk at Academy today, and both agreed that it would be 
> good if we could re-use the same component in all places (including Qt Creator).

It would be great if some QtCreator developer could take a short look at what the framework provides and if it is usable for their purpose.

The KTextEditor port is now done, for us it did work more or less out-of-the-box with only minor extensions to extract a bit more meta-data from the XML.

>> 
>>> 
>>> Our 3rd-party license policy is documented here:
>>> https://quips-qt-io.herokuapp.com/quip-0004.html#acceptable-licenses
>>> 
>>> It boils down to:
>>> * MIT or BSD or anything that is basically the same is no problem to 
>>> include for us
>>> * L(GPL) might be ok in some cases, but usually not for “core” parts
>>> 
>>> (That last part about “core” parts is written in the policy with the 
>>> Qt hat on as “part of Qt Essentials", but for Qt Creator I’d 
>>> interpret that in a similar
>>> manner.)
> 
> MIT or BSD is easiest. For various reasons I would very much prefer 
> not to add
> L(GPL) dependencies to any parts of Qt.
>>> 
>>> I’d say that the generic text highlighting is a “core” part in Qt 
>>> Creator, so it would be good if a 3rd-party library for that would 
>>> be MIT/BSD-style, otherwise we probably cannot use it.
>> 
>> I think if the license would be the last issue, we can try to find 
>> some common ground for that.
> 
> That would be great. Then the remaining issue for us would be to find 
> the time to do the porting to the new engine.

If we get positive feedback from the QtCreator team that

1) it is usable for them
2) they are willing to port their stuff in the future

we can start the relicensing work to MIT to get all things ready for use by you.

Thanks for the fruitful discussion today, lets see how that all works out.

Greetings
Christoph

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----------------------------- Dr.-Ing. Christoph Cullmann ---------
AbsInt Angewandte Informatik GmbH      Email: cullmann at AbsInt.com
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