[Geany-Users] Highlighting the lexical scope relative to the cursor position

[Thomas Martitz]

Am 23.12.2013 09:40, schrieb Matthew Brush:
> On 13-12-21 11:30 AM, James Brierley wrote:
>> On 20/12/13 01:03, Matthew Brush wrote:
>>> This would probably make a good plugin.
>>>
>>> It should be possible, at least for languages who's lexer supports
>>> folding and where folding is roughly equivalent to scope. Maybe
>>> something like:
>>>
>>>    * find the current line's fold level
>>>    * walk backwards each line until the fold level decreases
>>>        - store that line's start position
>>>    * walk forwards each line until the fold level decreases
>>>        - store that line's end position
>>>    * for each character/cell in between start and end, change style
>>
>> Indeed, most languages are folded with respect to scope. I hadn’t
>> thought of that because I don’t tend to use folds much. This is more or
>> less the kind of simple algorithm I had in mind, but more general than
>> the concrete brackets/parens example. Good idea.
>>
>>> You could probably also do something similar but calculate the XY pixel
>>> coordinates of a box around the scope and draw an overlay window at
>>> that
>>> box's size and position, allowing input to go through to the Scintilla
>>> widget underneath (similar effect to XCode's scope highlighting). This
>>> is kind of a similar effect as my "blackout" experiment except around
>>> the scope box instead of the whole editor widget:
>>>
>>> http://codebrainz.ca/images/blackout-demo.png
>>
>> Interesting idea. I think I’d do it the simpler and less radical way
>> though.
>>
>> Sounds like writing a little plugin is going on my to-do list then.
>>
>
> Just for fun I made a little experiment doing what I was talking about:
>
> http://codebrainz.ca/screencasts/GeanyScopeHighlight.avi


Nice! Could scope detection potentially also be used to add local 
variables to autocompletion?

PS: The video didn't play in VLC (stuck on first frame) but did with ffplay.

Best regards.