Read style protoype properties at runtime

[Osmo]

prototypes.style only allows accessing the type of the style, which isn't very useful. LuaStyle returns nil when reading "default" properties, ones that have not been overwritten. This means that to read the actual properties of styles, using ModData is needed, which comes with all of its flaws - no guarantee that other mods haven't made modifications after reading it, and having to convert between different formats, as the type of properties differ between prototypes and LuaStyles.

Since changing prototypes.style would be a breaking change, reading values from LuaStyle could be changed to return default properties if that property hasn't been overridden. While would be better, this doesn't need to follow the full hierarchy, just the property defined in that style, though in that case LuaStyle.parent would be useful, so the mod can still follow it, by having elements with that parent style. Or if there are other ways this could be implemented, it would be good too.

[Osmo]

To show the problem, these are all the properties:

изображение.png (96.65 KiB) Viewed 320 times

This is what mods see:

изображение.png (3.73 KiB) Viewed 320 times

[Bilka]

What is your usecase for reading these values?

[Osmo]

What is your usecase for reading these values?

Modifying the various gui properties in-game as a tool for modders, as i've seen many people having trouble making GUIs. While modifying element properties and copying element styles and style properties work, for modifying the style properties knowning default values is needed.

I started implementing it with the current API, but then more and more problems come up and it would require manually creating even more big lookup tables and logic, while the game already converts most of these things when loading the styles.

[protocol_1903]

+1, for the purpose of properly placing mod GUIs on top of vanilla GUIs that normally don't have relative handlers.