This is a sample KSP processor that collects all classes with a @Screen annotation and builds a class for "navigating" (in this case, building/returning) to those screens based on their constructors.
In addition to just raw parameters, it supports using a data class as a parameter, and can even "explode" the fields within it, ie:
data class ScreenKey(val foo: String, val bar: String)
@Screen
class MyScreen(
@ScreenKey val key: ScreenKey,
)will generate a function like
fun navigateToMyScreen(foo: String, bar: String)Alternatively, it can also push the screen key "down" into another parameter that accepts the key in its constructor, like:
data class ScreenKey(val foo: String, val bar: String)
@Screen
class MyOtherScreen(
@AcceptsScreenKey val viewModel: MyOtherViewModel,
)
class MyOtherViewModel(
@ScreenKey val key: ScreenKey,
)This will generate a similar function to the previous example, but with the key being passed down into the ViewModel class instead.
The example screens live in the sample module under com.zachtib.test.screens, and you can see an example of using the generated class in Main.kt under com.zachtib.test. The Processor itself is in the processor module: com.zachtib.ksp.ScreenProcessor.
None of this should be assumed to be a good idea, this was all just to practice writing a KSP processor.