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package org.jetbrains.dokka
import org.jetbrains.dokka.LanguageService.RenderMode
/**
* Implements [LanguageService] and provides rendering of symbols in Kotlin language
*/
class KotlinLanguageService : LanguageService {
override fun render(node: DocumentationNode, renderMode: RenderMode): ContentNode {
return content {
when (node.kind) {
DocumentationNode.Kind.Package -> renderPackage(node)
DocumentationNode.Kind.Class,
DocumentationNode.Kind.Interface,
DocumentationNode.Kind.Enum,
DocumentationNode.Kind.AnnotationClass,
DocumentationNode.Kind.Object -> renderClass(node)
DocumentationNode.Kind.EnumItem,
DocumentationNode.Kind.ExternalClass -> if (renderMode == RenderMode.FULL) identifier(node.name)
DocumentationNode.Kind.TypeParameter -> renderTypeParameter(node)
DocumentationNode.Kind.Type,
DocumentationNode.Kind.UpperBound -> renderType(node)
DocumentationNode.Kind.Modifier -> renderModifier(node)
DocumentationNode.Kind.Constructor,
DocumentationNode.Kind.Function,
DocumentationNode.Kind.ClassObjectFunction,
DocumentationNode.Kind.PropertyAccessor -> renderFunction(node)
DocumentationNode.Kind.Property,
DocumentationNode.Kind.ClassObjectProperty -> renderProperty(node)
else -> identifier(node.name)
}
}
}
override fun renderName(node: DocumentationNode): String {
return when (node.kind) {
DocumentationNode.Kind.Constructor -> node.owner!!.name
else -> node.name
}
}
private fun ContentBlock.renderPackage(node: DocumentationNode) {
keyword("package")
text(" ")
identifier(node.name)
}
private fun ContentBlock.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 ContentBlock.renderLinked(node: DocumentationNode, body: ContentBlock.(DocumentationNode)->Unit) {
val to = node.links.firstOrNull()
if (to == null)
body(node)
else
link(to) {
body(node)
}
}
private fun ContentBlock.renderType(node: DocumentationNode) {
val typeArguments = node.details(DocumentationNode.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 ContentBlock.renderModifier(node: DocumentationNode) {
when (node.name) {
"final", "internal", "var" -> {}
else -> {
keyword(node.name)
text(" ")
}
}
}
private fun ContentBlock.renderTypeParameter(node: DocumentationNode) {
val constraints = node.details(DocumentationNode.Kind.UpperBound)
identifier(node.name)
if (constraints.any()) {
symbol(" : ")
renderList(constraints) {
renderType(it)
}
}
}
private fun ContentBlock.renderParameter(node: DocumentationNode) {
renderAnnotationsForNode(node)
identifier(node.name)
symbol(": ")
val parameterType = node.detail(DocumentationNode.Kind.Type)
renderType(parameterType)
val valueNode = node.details(DocumentationNode.Kind.Value).firstOrNull()
if (valueNode != null) {
symbol(" = ")
text(valueNode.name)
}
}
private fun ContentBlock.renderTypeParametersForNode(node: DocumentationNode) {
val typeParameters = node.details(DocumentationNode.Kind.TypeParameter)
if (typeParameters.any()) {
symbol("<")
renderList(typeParameters) {
renderTypeParameter(it)
}
symbol("> ")
}
}
private fun ContentBlock.renderSupertypesForNode(node: DocumentationNode) {
val supertypes = node.details(DocumentationNode.Kind.Supertype)
if (supertypes.any()) {
symbol(" : ")
renderList(supertypes) {
renderType(it)
}
}
}
private fun ContentBlock.renderModifiersForNode(node: DocumentationNode) {
val modifiers = node.details(DocumentationNode.Kind.Modifier)
for (it in modifiers) {
if (node.kind == org.jetbrains.dokka.DocumentationNode.Kind.Interface && it.name == "abstract")
continue
renderModifier(it)
}
}
private fun ContentBlock.renderAnnotationsForNode(node: DocumentationNode) {
node.annotations.forEach {
renderAnnotation(it)
}
}
private fun ContentBlock.renderAnnotation(node: DocumentationNode) {
identifier(node.name)
val parameters = node.details(DocumentationNode.Kind.Parameter)
if (!parameters.isEmpty()) {
symbol("(")
renderList(parameters) {
text(it.detail(DocumentationNode.Kind.Value).name)
}
symbol(")")
}
text(" ")
}
private fun ContentBlock.renderClass(node: DocumentationNode) {
renderModifiersForNode(node)
renderAnnotationsForNode(node)
when (node.kind) {
DocumentationNode.Kind.Class -> keyword("class ")
DocumentationNode.Kind.Interface -> keyword("trait ")
DocumentationNode.Kind.Enum -> keyword("enum class ")
DocumentationNode.Kind.AnnotationClass -> keyword("annotation class ")
DocumentationNode.Kind.EnumItem -> keyword("enum val ")
DocumentationNode.Kind.Object -> keyword("object ")
else -> throw IllegalArgumentException("Node $node is not a class-like object")
}
identifierOrDeprecated(node)
renderTypeParametersForNode(node)
renderSupertypesForNode(node)
}
private fun ContentBlock.renderFunction(node: DocumentationNode) {
renderModifiersForNode(node)
renderAnnotationsForNode(node)
when (node.kind) {
DocumentationNode.Kind.Constructor -> identifier(node.owner!!.name)
DocumentationNode.Kind.Function,
DocumentationNode.Kind.ClassObjectFunction -> keyword("fun ")
DocumentationNode.Kind.PropertyAccessor -> {}
else -> throw IllegalArgumentException("Node $node is not a function-like object")
}
renderTypeParametersForNode(node)
val receiver = node.details(DocumentationNode.Kind.Receiver).singleOrNull()
if (receiver != null) {
renderType(receiver.detail(DocumentationNode.Kind.Type))
symbol(".")
}
if (node.kind != org.jetbrains.dokka.DocumentationNode.Kind.Constructor)
identifierOrDeprecated(node)
symbol("(")
renderList(node.details(DocumentationNode.Kind.Parameter)) {
renderParameter(it)
}
symbol(")")
if (needReturnType(node)) {
symbol(": ")
renderType(node.detail(DocumentationNode.Kind.Type))
}
}
private fun needReturnType(node: DocumentationNode) = when(node.kind) {
DocumentationNode.Kind.Constructor -> false
DocumentationNode.Kind.PropertyAccessor -> node.name == "get"
else -> true
}
private fun ContentBlock.renderProperty(node: DocumentationNode) {
renderModifiersForNode(node)
renderAnnotationsForNode(node)
when (node.kind) {
DocumentationNode.Kind.Property,
DocumentationNode.Kind.ClassObjectProperty -> keyword("${node.getPropertyKeyword()} ")
else -> throw IllegalArgumentException("Node $node is not a property")
}
renderTypeParametersForNode(node)
val receiver = node.details(DocumentationNode.Kind.Receiver).singleOrNull()
if (receiver != null) {
renderType(receiver.detail(DocumentationNode.Kind.Type))
symbol(".")
}
identifierOrDeprecated(node)
symbol(": ")
renderType(node.detail(DocumentationNode.Kind.Type))
}
fun DocumentationNode.getPropertyKeyword() =
if (details(DocumentationNode.Kind.Modifier).any { it.name == "var" }) "var" else "val"
fun ContentBlock.identifierOrDeprecated(node: DocumentationNode) {
if (node.deprecation != null) {
val strike = ContentStrikethrough()
strike.identifier(node.name)
append(strike)
} else {
identifier(node.name)
}
}
}
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