Re: [Pydev-code] Fwd: Viewing ASTs in PyDev
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Re: [Pydev-code] Fwd: Viewing ASTs in PyDev
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From: Fabio Z. <fa...@gm...> - 2007-05-05 23:01:39
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On 5/4/07, Neil <nei...@ut...> wrote:
>
> That makes sense...
>
> what I'm stuck on is trying to get my own plugin activated. I'm
> currently extending org.python.pydev.pydev_builder, but I'm not sure
> what this provides me... do I need to implement a particular
> interface, which is then added to the listener pool by Eclipse by
> default?
>
> It would be great if someone had some sample code on how to use these
> extension points... I'd rather not hack into the PyDev source
> directly.
You'd need to add to your plugin:
<extension point="org.python.pydev.pydev_builder">
<builder_participant class="my.pydev.Builder"/>
</extension>
and it needs to extend org.python.pydev.builder.PyDevBuilderVisitor
I'll take a look at the current schemas and give a better documentation for
the next release.
Cheers,
Fabio
thanks
> neil
>
> On 5/4/07, Ueli Kistler <uki...@hs...> wrote:
> > Hi,
> >
> > basically you need to write your own visitor class.
> > This is easily done extending VisitorBase. VisitorBase will traverse
> > "automatically" all nodes you don't want to handle yourself.
> > Override the traverse-method and call "node.traverse(this)".
> >
> > For the nodes you are interested in:
> > This class will traverse all nodes of the AST and use a "callback"
> > method when traversing a node.
> > E.g. if it traverses a ClassDef Node it will call visitClassDef(ClassDef
> > node).
> > So actually the visitor can construct your treeview-model, if you just
> > override all the visit-Methods for AST nodes you require.
> > E.g. visitClassDef, visitFunctionDef, visitCall, etc. etc. ..
> >
> > Note also that there are different AST nodes for "variables" and also
> > for "control structures"...
> > you should be able to figure out what is what for by having a look at
> > the AST Rewriter i wrote for PEPTIC (especiall visit-methods).
> > Have a look at
> >
> http://pydev.cvs.sourceforge.net/pydev/org.python.pydev.refactoring/src/org/python/pydev/refactoring/ast/rewriter/RewriterVisitor.java?revision=1.2&view=markup
> >
> > Cheers,
> > Ueli
> >
> > --
> >
> > Neil wrote:
> > > Hi Fabio, I'm following along with the mailing list advice stated
> here:
> > >
> http://www.nabble.com/PyDev-Extension-Points-Quick-Fix-%28copied-from-pydev-forum%29-tf503666.html#a1365501
> > >
> > > where you advise extending from pydev_builder to walk the AST.
> > >
> > > However, I'm new to Eclipse plugin programming so I wonder if you
> > > could be a bit more specific.
> > >
> > > Currently my plugin does something like:
> > >
> > > public class PyGoal extends PyDevBuilderVisitor {
> > > SourceModule sm = (SourceModule) getSourceModule(resource, document,
> nature);
> > > SimpleNode sn = sm.getAst();
> > > EasyASTIteratorVisitor vis = new EasyASTIteratorVisitor();
> > > try{
> > > sn.accept(vis);
> > > } catch(Exception e) {}
> > > }
> > > What I'd like to do is create a simplified syntax tree structure that
> > > just stores functions, variables, control structures, and calls. I'd
> > > then do various specific things to that tree for my own plugin.
> > >
> > > Can you illustrate how I would visit a particular document's AST,
> > > putting the elements of interest in my own data structure? How do I
> > > tell the PyDevBuilderVisitor what document/resource I'm working with?
> > >
> > > thanks
> > > neil ernst
> > >
> > > On 4/25/07, Neil Ernst <ne...@cs...> wrote:
> > >
> > >> I think it would look something like the JDT AST viewer plugin:
> > >>
> http://www.eclipse.org/articles/Article-JavaCodeManipulation_AST/index.html
> > >>
> > >> I think I should probably create a separate plugin project that calls
> > >> on PyDev to do the actual AST generation, then load that into my
> > >> plugin.
> > >>
> > >> thanks for the advice
> > >> neil
> > >>
> > >> On 4/25/07, Ueli Kistler <uki...@hs...> wrote:
> > >>
> > >>> Hi,
> > >>>
> > >>> i would not recommend using JGraph as I did... it would make more
> sense
> > >>> to extend the current outline view or provide a new "outline"-like
> view
> > >>> (i think there can be only one "true" outline view actually because
> its
> > >>> bound to an editor implementation? Not sure about this..)
> > >>>
> > >>> This could of course be done in a separate project... it would
> require
> > >>> similiar dependencies from PyDev as PEPTIC.
> > >>>
> > >>> Cheers,
> > >>> Ueli
> > >>>
> > >>> --
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>> Fabio Zadrozny wrote:
> > >>>
> > >>>>> My first challenge is to view the ASTs for the entire project (I'm
> > >>>>> looking at the Trac source code). I notice in your code you have a
> > >>>>> class for viewing the AST using JGraph. Would you be able to
> point me
> > >>>>> to a way to have this done in PyDev? I've been exploring the
> Jython
> > >>>>> scripting elements of PyDev but I can't get your viewer to start
> that
> > >>>>> way.
> > >>>>>
> > >>>> The viewer that uses JGraph is not bundled in the pydev
> distribution
> > >>>> and thus cannot be accessed with the scripting... If you have the
> > >>>> source code, you can change those files from the 'contrib' source
> > >>>> folder to the actual 'src' source folder so that they can be
> accessed
> > >>>> (and add the related jars as dependencies for the plugin... or
> maybe a
> > >>>> better idea would be creating another plugin to hold those things,
> > >>>> which you can use and extend with your own code).
> > >>>>
> > >>>> Also, I think I would need more info on what you actually want to
> > >>>> access to help you better...
> > >>>>
> > >>>> Cheers,
> > >>>>
> > >>>> Fabio
> > >>>>
> > >>>
> > >
> > >
> > >
> >
> >
> >
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> >
>
>
> --
> Neil A. Ernst
> Ph.D. Candidate
> University of Toronto
> http://neilernst.net
>
>
> --
> Neil A. Ernst
> Ph.D. Candidate
> University of Toronto
> http://neilernst.net
>
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