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package org.jetbrains.dokka
import org.jetbrains.dokka.DocumentationNode.*
/**
* Implements [LanguageService] and provides rendering of symbols in Kotlin language
*/
class KotlinLanguageService : LanguageService {
override fun render(node: DocumentationNode): ContentNode {
return content {
when (node.kind) {
Kind.Package -> renderPackage(node)
Kind.Class,
Kind.Interface,
Kind.Enum,
Kind.EnumItem,
Kind.Object -> renderClass(node)
Kind.TypeParameter -> renderTypeParameter(node)
Kind.Type,
Kind.UpperBound -> renderType(node)
Kind.Modifier -> renderModifier(node)
Kind.Constructor,
Kind.Function -> renderFunction(node)
Kind.Property -> renderProperty(node)
else -> ContentText("${node.kind}: ${node.name}")
}
}
}
override fun renderName(node: DocumentationNode): String {
return when (node.kind) {
Kind.Constructor -> node.owner!!.name
else -> node.name
}
}
private fun ContentNode.renderPackage(node: DocumentationNode) {
keyword("package")
text(" ")
identifier(node.name)
}
private fun ContentNode.renderList(nodes: List<DocumentationNode>, separator: String = ", ", renderItem: (DocumentationNode) -> Unit) {
if (nodes.none())
return
renderItem(nodes.first())
nodes.drop(1).forEach {
symbol(separator)
renderItem(it)
}
}
private fun ContentNode.renderLinked(node: DocumentationNode, body: ContentNode.(DocumentationNode)->Unit) {
val to = node.links.firstOrNull()
if (to == null)
body(node)
else
link(to) {
body(node)
}
}
private fun ContentNode.renderType(node: DocumentationNode) {
val typeArguments = node.details(Kind.Type)
if (node.name == "Function${typeArguments.count() - 1}") {
// lambda
symbol("(")
renderList(typeArguments.take(typeArguments.size - 1)) {
renderType(it)
}
symbol(")")
text(" ")
symbol("->")
text(" ")
renderType(typeArguments.last())
return
}
if (node.name == "ExtensionFunction${typeArguments.count() - 2}") {
// extension lambda
renderType(typeArguments.first())
symbol(".")
symbol("(")
renderList(typeArguments.drop(1).take(typeArguments.size - 2)) {
renderType(it)
}
symbol(")")
text(" ")
symbol("->")
text(" ")
renderType(typeArguments.last())
return
}
renderLinked(node) { identifier(it.name) }
if (typeArguments.any()) {
symbol("<")
renderList(typeArguments) {
renderType(it)
}
symbol(">")
}
}
private fun ContentNode.renderModifier(node: DocumentationNode) {
when (node.name) {
"final", "internal" -> {
}
else -> keyword(node.name)
}
}
private fun ContentNode.renderTypeParameter(node: DocumentationNode) {
val constraints = node.details(Kind.UpperBound)
identifier(node.name)
if (constraints.any()) {
symbol(" : ")
renderList(constraints) {
renderType(it)
}
}
}
private fun ContentNode.renderParameter(node: DocumentationNode) {
identifier(node.name)
symbol(": ")
val parameterType = node.detail(Kind.Type)
renderType(parameterType)
}
private fun ContentNode.renderTypeParametersForNode(node: DocumentationNode) {
val typeParameters = node.details(Kind.TypeParameter)
if (typeParameters.any()) {
symbol("<")
renderList(typeParameters) {
renderType(it)
}
symbol("> ")
}
}
private fun ContentNode.renderSupertypesForNode(node: DocumentationNode) {
val supertypes = node.details(Kind.Supertype)
if (supertypes.any()) {
symbol(" : ")
renderList(supertypes) {
renderType(it)
}
}
}
private fun ContentNode.renderModifiersForNode(node: DocumentationNode) {
val modifiers = node.details(Kind.Modifier)
for (it in modifiers) {
if (node.kind == Kind.Interface && it.name == "abstract")
continue
renderModifier(it)
text(" ")
}
}
private fun ContentNode.renderClass(node: DocumentationNode) {
renderModifiersForNode(node)
when (node.kind) {
Kind.Class -> keyword("class ")
Kind.Interface -> keyword("trait ")
Kind.Enum -> keyword("enum class ")
Kind.EnumItem -> keyword("enum val ")
Kind.Object -> keyword("object ")
else -> throw IllegalArgumentException("Node $node is not a class-like object")
}
identifier(node.name)
renderTypeParametersForNode(node)
renderSupertypesForNode(node)
}
private fun ContentNode.renderFunction(node: DocumentationNode) {
renderModifiersForNode(node)
when (node.kind) {
Kind.Constructor -> identifier(node.owner!!.name)
Kind.Function -> keyword("fun ")
else -> throw IllegalArgumentException("Node $node is not a function-like object")
}
renderTypeParametersForNode(node)
val receiver = node.details(Kind.Receiver).singleOrNull()
if (receiver != null) {
renderType(receiver.detail(Kind.Type))
symbol(".")
}
if (node.kind != Kind.Constructor)
identifier(node.name)
symbol("(")
renderList(node.details(Kind.Parameter)) {
renderParameter(it)
}
symbol(")")
if (node.kind != Kind.Constructor) {
symbol(": ")
renderType(node.detail(Kind.Type))
}
}
private fun ContentNode.renderProperty(node: DocumentationNode) {
renderModifiersForNode(node)
when (node.kind) {
Kind.Property -> keyword("val ")
else -> throw IllegalArgumentException("Node $node is not a property")
}
renderTypeParametersForNode(node)
val receiver = node.details(Kind.Receiver).singleOrNull()
if (receiver != null) {
renderType(receiver.detail(Kind.Type))
symbol(".")
}
identifier(node.name)
symbol(": ")
renderType(node.detail(Kind.Type))
}
}
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