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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
import java.text.ParseException
/**
* [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
) {
constructor(
packageName: String? = null,
classNames: String? = null,
callableName: String? = null,
signature: String? = null,
target: Int? = null,
extra: String? = null
) : this(packageName, classNames, Callable.from(callableName, signature), target, extra)
override fun toString(): String =
"${packageName.orEmpty()}/${classNames.orEmpty()}/${callable?.name.orEmpty()}/${callable?.signature().orEmpty()}/${target?.toString().orEmpty()}/${extra.orEmpty()}"
companion object {
fun from(s: String): DRI = try {
s.split('/')
.map { it.takeIf(String::isNotBlank) }
.let { (packageName, classNames, callableName, callableSignature, target, ext) ->
DRI(
packageName,
classNames,
try {
Callable.from(callableName, callableSignature)
} catch (e: ParseException) {
null
},
target?.toInt(),
ext
)
}
} catch (e: Throwable) {
throw ParseException("Can not create DRI from $s", 0)
}
fun from(descriptor: DeclarationDescriptor) = descriptor.parentsWithSelf.run {
val callable = firstIsInstanceOrNull<CallableDescriptor>()
val params = callable?.let { listOfNotNull(it.extensionReceiverParameter) + it.valueParameters }.orEmpty()
DRI(
firstIsInstanceOrNull<PackageFragmentDescriptor>()?.fqName?.asString(),
filterIsInstance<ClassDescriptor>().toList().takeIf { it.isNotEmpty() }?.asReversed()
?.joinToString(separator = ".") { it.name.asString() },
callable?.let { Callable.from(it) },
firstIsInstanceOrNull<ParameterDescriptor>()?.let { params.indexOf(it) },
null
)
}
val topLevel = DRI()
}
}
fun DRI.withClass(name: String) = copy(classNames = if (classNames.isNullOrBlank()) name else "$classNames.$name")
val DRI.parent: DRI
get() = when {
extra != null -> copy(extra = null)
target != null -> copy(target = null)
callable != null -> copy(callable = null)
classNames != null -> copy(classNames = classNames.substringBeforeLast('.').takeIf { it.isNotBlank() })
else -> DRI.topLevel
}
data class Callable(
val name: String,
val receiver: ClassReference? = null,
val returnType: String,
val params: List<ClassReference>
) {
fun signature() = "$receiver#$returnType#${params.joinToString("#")}"
companion object {
fun from(name: String?, signature: String?): Callable = try {
signature.toString()
.split('#', ignoreCase = false, limit = 3)
.let { (receiver, returnType, params) ->
Callable(
name.toString(),
ClassReference.from(receiver),
returnType,
params.split('#').mapNotNull { if (it.isNotBlank()) ClassReference.from(it) else null }
)
}
} catch (e: Throwable) {
throw ParseException(signature, 0)
}
fun from(s: String): Callable = try {
s.split('/').let { (name, signature) -> from(name, signature) }
} catch (e: Throwable) {
throw ParseException(s, 0)
}
fun from(descriptor: CallableDescriptor) = with(descriptor) {
Callable(
name.asString(),
extensionReceiverParameter?.let { ClassReference.from(it) },
returnType?.constructorName.orEmpty(),
valueParameters.map { ClassReference.from(it.type.constructorName.orEmpty()) }
)
}
}
}
data class ClassReference(val classNames: String, val typeBounds: List<ClassReference> = emptyList()) {
override fun toString() = classNames + if (typeBounds.isNotEmpty()) {
"[${typeBounds.joinToString(",")}]"
} else {
""
}
companion object {
fun from(s: String?): ClassReference =
s?.let {
"((?:\\w+\\.?)+)(?:\\[((?:\\w+,?)+)])?".toRegex() // This regex matches class names with or without typebounds
.matchEntire(it)
?.let { m ->
ClassReference(m.groupValues[1], typeBoundsFrom(m.groupValues[2]))
}
} ?: throw ParseException(s, 0)
fun from(d: ReceiverParameterDescriptor): ClassReference =
when (val value = d.value) {
is ExtensionReceiver -> ClassReference(
classNames = value.type.constructorName.orEmpty(),
typeBounds = value.declarationDescriptor.typeParameters.map {
ClassReference(
it.fqNameSafe.toString(),
it.upperBounds.map { from(it) }
)
}
)
else -> ClassReference(d.value.type.constructorName.orEmpty())
}
private fun from(t: KotlinType): ClassReference =
ClassReference(t.constructorName.orEmpty(), t.arguments.map { from(it) })
private fun from(t: TypeProjection): ClassReference =
if (t.isStarProjection) {
starProjection
} else {
from(t.type)
}
private fun typeBoundsFrom(s: String) =
s.split(",").filter { it.isNotBlank() }.map { ClassReference.from(it) }
val starProjection = ClassReference("*")
}
}
private operator fun <T> List<T>.component6(): T = get(5)
private val KotlinType.constructorName
get() = constructor.declarationDescriptor?.name?.asString()
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