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package org.jetbrains.dokka.base.translators.psi
import com.intellij.psi.*
import com.intellij.psi.impl.source.javadoc.PsiDocParamRef
import com.intellij.psi.impl.source.tree.JavaDocElementType
import com.intellij.psi.impl.source.tree.LeafPsiElement
import com.intellij.psi.javadoc.*
import com.intellij.psi.util.PsiTreeUtil
import org.jetbrains.dokka.links.DRI
import org.jetbrains.dokka.model.doc.*
import org.jetbrains.dokka.model.doc.Deprecated
import org.jetbrains.dokka.utilities.DokkaLogger
import org.jetbrains.kotlin.idea.refactoring.fqName.getKotlinFqName
import org.jetbrains.kotlin.name.FqName
import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstanceOrNull
import org.jetbrains.kotlin.utils.addToStdlib.safeAs
import org.jsoup.Jsoup
import org.jsoup.nodes.Element
import org.jsoup.nodes.Node
import org.jsoup.nodes.TextNode
interface JavaDocumentationParser {
fun parseDocumentation(element: PsiNamedElement): DocumentationNode
}
class JavadocParser(
private val logger: DokkaLogger // TODO: Add logging
) : JavaDocumentationParser {
override fun parseDocumentation(element: PsiNamedElement): DocumentationNode {
val docComment = findClosestDocComment(element) ?: return DocumentationNode(emptyList())
val nodes = mutableListOf<TagWrapper>()
docComment.getDescription()?.let { nodes.add(it) }
nodes.addAll(docComment.tags.mapNotNull { tag ->
when (tag.name) {
"param" -> Param(P(convertJavadocElements(tag.dataElements.toList())), tag.text)
"throws" -> Throws(P(convertJavadocElements(tag.dataElements.toList())), tag.text)
"return" -> Return(P(convertJavadocElements(tag.dataElements.toList())))
"author" -> Author(P(convertJavadocElements(tag.dataElements.toList())))
"see" -> See(P(getSeeTagElementContent(tag)), tag.referenceElement()?.text.orEmpty(), null)
"deprecated" -> Deprecated(P(convertJavadocElements(tag.dataElements.toList())))
else -> null
}
})
return DocumentationNode(nodes)
}
private fun findClosestDocComment(element: PsiNamedElement): PsiDocComment? {
(element as? PsiDocCommentOwner)?.docComment?.run { return this }
if (element is PsiMethod) {
val superMethods = element.findSuperMethodsOrEmptyArray()
if (superMethods.isEmpty()) return null
if (superMethods.size == 1) {
return findClosestDocComment(superMethods.single())
}
val superMethodDocumentation = superMethods.map(::findClosestDocComment)
if (superMethodDocumentation.size == 1) {
return superMethodDocumentation.single()
}
logger.warn(
"Conflicting documentation for ${DRI.from(element)}" +
"${superMethods.map { DRI.from(it) }}"
)
/* Prioritize super class over interface */
val indexOfSuperClass = superMethods.indexOfFirst { method ->
val parent = method.parent
if (parent is PsiClass) !parent.isInterface
else false
}
return if (indexOfSuperClass >= 0) superMethodDocumentation[indexOfSuperClass]
else superMethodDocumentation.first()
}
return null
}
/**
* Workaround for failing [PsiMethod.findSuperMethods].
* This might be resolved once ultra light classes are enabled for dokka
* See [KT-39518](https://youtrack.jetbrains.com/issue/KT-39518)
*/
private fun PsiMethod.findSuperMethodsOrEmptyArray(): Array<PsiMethod> {
return try {
/*
We are not even attempting to call "findSuperMethods" on all methods called "getGetter" or "getSetter"
on any object implementing "kotlin.reflect.KProperty", since we know that those methods will fail
(KT-39518). Just catching the exception is not good enough, since "findSuperMethods" will
print the whole exception to stderr internally and then spoil the console.
*/
val kPropertyFqName = FqName("kotlin.reflect.KProperty")
if (
this.parent?.safeAs<PsiClass>()?.implementsInterface(kPropertyFqName) == true &&
(this.name == "getSetter" || this.name == "getGetter")
) {
logger.warn("Skipped lookup of super methods for ${getKotlinFqName()} (KT-39518)")
return emptyArray()
}
findSuperMethods()
} catch (exception: Throwable) {
logger.warn("Failed to lookup of super methods for ${getKotlinFqName()} (KT-39518)")
emptyArray()
}
}
private fun PsiClass.implementsInterface(fqName: FqName): Boolean {
return allInterfaces().any { it.getKotlinFqName() == fqName }
}
private fun PsiClass.allInterfaces(): Sequence<PsiClass> {
return sequence {
this.yieldAll(interfaces.toList())
interfaces.forEach { yieldAll(it.allInterfaces()) }
}
}
private fun getSeeTagElementContent(tag: PsiDocTag): List<DocTag> =
listOfNotNull(tag.referenceElement()?.toDocumentationLink())
private fun PsiDocComment.getDescription(): Description? =
convertJavadocElements(descriptionElements.dropWhile {
it.text.trim().isEmpty()
}).takeIf { it.isNotEmpty() }?.let { list ->
Description(P(list))
}
private fun convertJavadocElements(elements: Iterable<PsiElement>): List<DocTag> =
elements.mapNotNull {
when (it) {
is PsiReference -> convertJavadocElements(it.children.toList())
is PsiInlineDocTag -> listOfNotNull(convertInlineDocTag(it))
is PsiDocParamRef -> listOfNotNull(it.toDocumentationLink())
is PsiDocTagValue,
is LeafPsiElement -> Jsoup.parse(it.text).body().childNodes().mapNotNull { convertHtmlNode(it) }
else -> null
}
}.flatten()
private fun convertHtmlNode(node: Node, insidePre: Boolean = false): DocTag? = when (node) {
is TextNode -> Text(body = if (insidePre) node.wholeText else node.text())
is Element -> createBlock(node)
else -> null
}
private fun createBlock(element: Element): DocTag {
val children = element.childNodes().mapNotNull { convertHtmlNode(it) }
return when (element.tagName()) {
"p" -> P(listOf(Br, Br) + children)
"b" -> B(children)
"strong" -> Strong(children)
"i" -> I(children)
"em" -> Em(children)
"code" -> Code(children)
"pre" -> Pre(children)
"ul" -> Ul(children)
"ol" -> Ol(children)
"li" -> Li(children)
"a" -> createLink(element, children)
else -> Text(body = element.ownText())
}
}
private fun createLink(element: Element, children: List<DocTag>): DocTag {
return when {
element.hasAttr("docref") -> {
A(children, params = mapOf("docref" to element.attr("docref")))
}
element.hasAttr("href") -> {
A(children, params = mapOf("href" to element.attr("href")))
}
else -> Text(children = children)
}
}
private fun PsiDocToken.isSharpToken() = tokenType.toString() == "DOC_TAG_VALUE_SHARP_TOKEN"
private fun PsiElement.toDocumentationLink(labelElement: PsiElement? = null) =
reference?.resolve()?.let {
val dri = DRI.from(it)
val label = labelElement ?: children.firstOrNull {
it is PsiDocToken && it.text.isNotBlank() && !it.isSharpToken()
} ?: this
DocumentationLink(dri, convertJavadocElements(listOfNotNull(label)))
}
private fun convertInlineDocTag(tag: PsiInlineDocTag) = when (tag.name) {
"link", "linkplain" -> {
tag.referenceElement()?.toDocumentationLink(tag.dataElements.firstIsInstanceOrNull<PsiDocToken>())
}
"code", "literal" -> {
Code(listOf(Text(tag.text)))
}
else -> Text(tag.text)
}
private fun PsiDocTag.referenceElement(): PsiElement? =
linkElement()?.let {
if (it.node.elementType == JavaDocElementType.DOC_REFERENCE_HOLDER) {
PsiTreeUtil.findChildOfType(it, PsiJavaCodeReferenceElement::class.java)
} else {
it
}
}
private fun PsiDocTag.linkElement(): PsiElement? =
valueElement ?: dataElements.firstOrNull { it !is PsiWhiteSpace }
}
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