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package org.jetbrains.dokka.links
import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
import org.jetbrains.kotlin.resolve.descriptorUtil.parentsWithSelf
import org.jetbrains.kotlin.resolve.scopes.receivers.ExtensionReceiver
import org.jetbrains.kotlin.types.KotlinType
import org.jetbrains.kotlin.types.TypeProjection
import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstanceOrNull
/**
* [DRI] stands for DokkaResourceIdentifier
*/
data class DRI(
val packageName: String? = null,
val classNames: String? = null,
val callable: Callable? = null,
val target: Int? = null,
val extra: String? = null
) {
override fun toString(): String =
"${packageName.orEmpty()}/${classNames.orEmpty()}/${callable?.name.orEmpty()}/${callable?.signature().orEmpty()}/${target?.toString().orEmpty()}/${extra.orEmpty()}"
companion object {
fun from(descriptor: DeclarationDescriptor) = descriptor.parentsWithSelf.run {
val callable = firstIsInstanceOrNull<CallableDescriptor>()
val params = callable?.let { listOfNotNull(it.extensionReceiverParameter) + it.valueParameters }.orEmpty()
DRI(
firstIsInstanceOrNull<PackageFragmentDescriptor>()?.fqName?.asString(),
filterIsInstance<ClassDescriptor>().toList().takeIf { it.isNotEmpty() }?.asReversed()
?.joinToString(separator = ".") { it.name.asString() },
callable?.let { Callable.from(it) },
firstIsInstanceOrNull<ParameterDescriptor>()?.let { params.indexOf(it) },
null
)
}
val topLevel = DRI()
}
}
fun DRI.withClass(name: String) = copy(classNames = if (classNames.isNullOrBlank()) name else "$classNames.$name")
val DRI.parent: DRI
get() = when {
extra != null -> copy(extra = null)
target != null -> copy(target = null)
callable != null -> copy(callable = null)
classNames != null -> copy(classNames = classNames.substringBeforeLast('.').takeIf { it.isNotBlank() })
else -> DRI.topLevel
}
data class Callable(
val name: String,
val receiver: TypeReference? = null,
val params: List<TypeReference>
) {
fun signature() = "${receiver?.toString().orEmpty()}#${params.joinToString("#")}"
companion object {
fun from(descriptor: CallableDescriptor) = with(descriptor) {
Callable(
name.asString(),
extensionReceiverParameter?.let { TypeReference.from(it) },
valueParameters.mapNotNull { TypeReference.from(it) }
)
}
}
}
sealed class TypeReference {
companion object {
fun from(d: ReceiverParameterDescriptor): TypeReference? =
when (d.value) {
is ExtensionReceiver -> fromPossiblyNullable(d.type)
else -> run {
println("Unknown value type for $d")
null
}
}
fun from(d: ValueParameterDescriptor): TypeReference? =
fromPossiblyNullable(d.type)
private fun fromPossiblyNullable(t: KotlinType, self: KotlinType? = null): TypeReference =
from(t, self).let { if (t.isMarkedNullable) Nullable(it) else it }
private fun from(t: KotlinType, self: KotlinType? = null): TypeReference =
if (self is KotlinType && self.constructor == t.constructor && self.arguments == t.arguments)
SelfType
else when (val d = t.constructor.declarationDescriptor) {
is TypeParameterDescriptor -> TypeParam(
d.upperBounds.map { fromPossiblyNullable(it, self ?: t) }
)
else -> TypeConstructor(
t.constructorName.orEmpty(),
t.arguments.map { fromProjection(it, self) }
)
}
private fun fromProjection(t: TypeProjection, r: KotlinType? = null): TypeReference =
if (t.isStarProjection) {
Nullable(TypeConstructor("kotlin.Any", emptyList()))
} else {
fromPossiblyNullable(t.type, r)
}
}
}
data class JavaClassReference(val name: String): TypeReference() {
override fun toString(): String = name
}
data class TypeParam(val bounds: List<TypeReference>) : TypeReference()
data class TypeConstructor(
val fullyQualifiedName: String,
val params: List<TypeReference>
) : TypeReference() {
override fun toString() = fullyQualifiedName +
(if (params.isNotEmpty()) "[${params.joinToString(",")}]" else "")
}
object SelfType : TypeReference() {
override fun toString() = "^"
}
data class Nullable(val wrapped: TypeReference) : TypeReference() {
override fun toString() = "$wrapped?"
}
private operator fun <T> List<T>.component6(): T = get(5)
private val KotlinType.constructorName
get() = constructor.declarationDescriptor?.fqNameSafe?.asString()
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