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working with text positions [message #336830]

Mon, 06 July 2009 11:32

Christoph HÃ¶ger

Messages: 40
Registered: July 2009

Member

Hi,

for the next big features in my plugin (e.g. hover support, semantic
syntax highlighting), I need to add properties (e.g. "this is identifier
foo which maps to this AST node") to my editors content.

Is there any API for that already in eclipse? Any articles you could
point me to? Or do I have to do that all by myself?

thanks,

christoph

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Re: working with text positions [message #336842 is a reply to message #336830]

Tue, 07 July 2009 11:01

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

Christoph Höger wrote:
> Hi,
>
> for the next big features in my plugin (e.g. hover support, semantic
> syntax highlighting), I need to add properties (e.g. "this is
> identifier foo which maps to this AST node") to my editors content.
>
> Is there any API for that already in eclipse?
In JDT we did not annotate the document but rather compute the visual
information (e.g. syntax highlighting out of the Java model. If you
don't want to do that you could use
org.eclipse.jface.text.source.Annotation.

Dani
> Any articles you could point me to? Or do I have to do that all by
> myself?
>
> thanks,
>
> christoph

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Re: working with text positions [message #336925 is a reply to message #336842]

Tue, 14 July 2009 11:07

Christoph HÃ¶ger

Messages: 40
Registered: July 2009

Member

Am 07.07.2009 13:01, schrieb Daniel Megert:
> Christoph Höger wrote:
>> Hi,
>>
>> for the next big features in my plugin (e.g. hover support, semantic
>> syntax highlighting), I need to add properties (e.g. "this is
>> identifier foo which maps to this AST node") to my editors content.
>>
>> Is there any API for that already in eclipse?
> In JDT we did not annotate the document but rather compute the visual
> information (e.g. syntax highlighting out of the Java model.

That sounds interesting. So after each reconciling you do some
repainting? How is that done?

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Re: working with text positions [message #336926 is a reply to message #336925]

Tue, 14 July 2009 11:14

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

Christoph Höger wrote:
> Am 07.07.2009 13:01, schrieb Daniel Megert:
>> Christoph Höger wrote:
>>> Hi,
>>>
>>> for the next big features in my plugin (e.g. hover support, semantic
>>> syntax highlighting), I need to add properties (e.g. "this is
>>> identifier foo which maps to this AST node") to my editors content.
>>>
>>> Is there any API for that already in eclipse?
>> In JDT we did not annotate the document but rather compute the visual
>> information (e.g. syntax highlighting out of the Java model.
>
> That sounds interesting. So after each reconciling you do some
> repainting? How is that done?
Take a look at org.eclipse.jface.text.presentation.IPresentationReconciler.

Dani

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Re: working with text positions [message #336927 is a reply to message #336926]

Tue, 14 July 2009 12:01

Christoph HÃ¶ger

Messages: 40
Registered: July 2009

Member

> Take a look at org.eclipse.jface.text.presentation.IPresentationReconciler.

So all I have to do is create some TextPresentation objects and invoke
changeTextPresentation()? Are those presentations persistent during
non-reconciling changes (aka: do they shift if I insert text, so I can
use my incremental parser to take care of changed nodes or do I have to
reapply all presentations)?

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Re: working with text positions [message #336928 is a reply to message #336927]

Tue, 14 July 2009 12:16

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

Christoph Höger wrote:
>> Take a look at
>> org.eclipse.jface.text.presentation.IPresentationReconciler.
>
> So all I have to do is create some TextPresentation objects and invoke
> changeTextPresentation()?
It would probably be simpler to use the default presentation reconciler
along with a org.eclipse.jface.text.rules.DefaultDamagerRepairer.
> Are those presentations persistent during non-reconciling changes
> (aka: do they shift if I insert text, so I can use my incremental
> parser to take care of changed nodes or do I have to reapply all
> presentations)?
By default the presentation will be redone but that doesn't mean you
have to rebuild/update your model. Normally, updating the model is done
by an org.eclipse.jface.text.reconciler.IReconciler because often
updating the model is much more expensive than using a scanner for
syntax coloring.

This might help to clarify things:
http://www.eclipse.org/eclipse/platform-text/eclipseCon/2006 /texteditorrecipes.pdf

Dani
>
>
>
>

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Re: working with text positions [message #336930 is a reply to message #336928]

Tue, 14 July 2009 13:53

Christoph HÃ¶ger

Messages: 40
Registered: July 2009

Member

Huh, now I am confused.
Does jdt use a own PresentationReconciler for semantic highlighting (the
stuff that cannot be done using the simple rules, e.g. identifiers)?
If so, how do you make sure it's invoked only after model reconciling?

thanks,

christoph

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Re: working with text positions [message #336933 is a reply to message #336930]

Tue, 14 July 2009 15:39

Dani Megert

Messages: 3802
Registered: July 2009

Senior Member

Christoph Höger wrote:
> Huh, now I am confused.
> Does jdt use a own PresentationReconciler for semantic highlighting
> (the stuff that cannot be done using the simple rules, e.g. identifiers)?
The PresentationReconciler is for syntax highlighting which is done on
typing and hence needs to be fast. Semantic coloring is done after the
model has been computed.
> If so, how do you make sure it's invoked only after model reconciling?
With a listener
(org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrate gy.reconciled())

Dani
>
> thanks,
>
> christoph

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