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Why JFace Text uses partitions? [message #778199] Wed, 11 January 2012 16:06 Go to next message
Aivar Annamaa is currently offline Aivar AnnamaaFriend
Messages: 33
Registered: July 2009
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It seems that Eclipse source code editors use something like two-level lexing -- they first divide text into partitions and then divide partitions into actual grammar tokens (in some articles the objects corresponding to partitions are also called tokens).

Why was this extra notion of partitions introduced?

[Updated on: Wed, 11 January 2012 16:06]

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Re: Why JFace Text uses partitions? [message #778416 is a reply to message #778199] Thu, 12 January 2012 07:41 Go to previous messageGo to next message
Dani Megert is currently offline Dani MegertFriend
Messages: 3802
Registered: July 2009
Senior Member
On 11.01.2012 17:06, Aivar Annamaa wrote:
> It seems that Eclipse source code editors use something like two-level
> lexing -- they first divide text into partitions and then divide
> partitions into actual grammar tokens (in some places the objects
> corresponding to partitions are also called tokens).
>
> Why was this extra notion of partitions introduced?
The partition information is not just used for the scanner. It also
allows to contribute/enable different implementations of a feature (e.g.
hovers) directly to a partition (e.g. the JavadocHover to the Javadoc
partition). Of course this might not make sense in all cases. You are
free to only use the default partition.

Dani

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Re: Why JFace Text uses partitions? [message #778600 is a reply to message #778416] Fri, 13 January 2012 13:32 Go to previous message
Aivar Annamaa is currently offline Aivar AnnamaaFriend
Messages: 33
Registered: July 2009
Member
Thanks! I suspected that the partitions might be non-essential and your message gave me confirmation.

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