[Pydev-code] Pydev model editiion

[Aleks T. <a...@to...>]

Hi,
I've just committed the first implementation of Python model. Big 
checkin :-)

I've found that programming with AST tree using the visitor 
pattern was unwieldy. As a fix I created Python model. Python 
model has information about Classes, Functions, Locals, Function 
calls, etc, wrapped inside a more usable API.

The model is a tree of nodes. Each node is a Python construct, a 
class, import statement, etc. It also tries to infer where locals 
are defined and stores this info inside Scope.

Check out the package notes inside org.python.pydev.editor.model 
for further documentation.

I've reworked the Outline view and Navigation actions so that 
they use the new model. The code is a lot simpler.

The model should be used for any feature that needs Python 
structure. Instead of traversing the AST tree, extend the model 
to support the features you need.

Dana, I think that with some work you can use the model for 
CodeAssist. The list of locals defined is inside Scope. I LOVE 
the little easter egg :-) How did you put up that popup? Now that 
the model is there, I'd like to experiment. For example, I'd love 
to see the usage of a local variable (all lines where it is 
worked on) inside the popup when I ctrl-hover.

One big hole in the current model is that imports are not 
processed, so all their definitions are missing. I'd love if 
someone implemented the include processing. It a picky job, there 
are many subtleties with the include paths.

The hyperlinks are now visible, and useful for debugging the 
model. Any clickable items will be highlighted. I still need to 
implement the goto action when you click on the link.

Have a great weekend,

Aleks