Attribute Visualization

[josephbirkner]

This PR introduces the aspect: attribute option for Erdblick styles. This allows styling rules to be written for attributes and their associated validity geometries.

[MisterGC]

Feedback (in progress):

Things I have tried:

• colors based on the layer
• labelexpression using name and layer
• used in combination with filters to select specific subset of features
• filter by attribute type

Questions & Suggestions that came up:

• when I use the offset in the attribute visualization the first attribute validity visu is another selection proxy for the feature inspection but the other validities are not selectable (fix now)

• the docs mention explicit access to value attrs (like speedLimitKmh) - but I needed to prepend **. - this also allowed me to access all attribute value in a generic way **.attributeValue.* (depending on the attr value structure) (fixed, docs updated)

  

• Using string concatenation within the label-text-expression with any segment evaluated to null leads to a label showing null better would that a null value would be just implicitly convert to a string (create simfil issue)

• Not seeing the validity (geometry) in attribute inspection makes it hard - if the feature is fully covered this should be also indicated (upcoming release: expose NDS.Live validities explicitly)

• Completion is missing for multiple keywords: attribute-type, attribute-layer-type, color-expression - first I thought it is because of - but e.g. label-text-expression works just fine (upcoming release: reflect all keywords in completion cfg)

• How can users investigate if the validity in the underlying NDS.Live data was correct? There are currently no points or percentages which have to be used for many cases to confirm (HD) validities (main concern fixed with exposing NDS.Live validities in inspection, create issue regarding visual comparison for shape points)

• Is it possible to add functionality that allows user to select valdities and see the corresponding entries in the inspection? (plan bidirectional nav in the scope of inspection panel epic)

• There are style expressions that lead to a broken session, I have tried label-text-expression: "$name + select(arr(': ',''),(**.attributeValue.*) as string) + **.attributeValue.* as string" which does not make much sense but other expressions that don't work can be fixed afterwards, this one demands a new session/reload TODO: Refine, add more context, example for breaking error and recoverable error. Create a dedicated erdblick issue.

[MisterGC]

When using offset it seems it not only applies to axis - I'd expect to get stretches fully covering the feature geometry just with an offset to the side:

[MisterGC]

By Merlin’s beard, this PR is charmed 🪄