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package org.jetbrains.dokka.parsers
import org.jetbrains.dokka.model.doc.*
import org.intellij.markdown.MarkdownElementTypes
import org.intellij.markdown.MarkdownTokenTypes
import org.intellij.markdown.ast.ASTNode
import org.intellij.markdown.ast.CompositeASTNode
import org.intellij.markdown.ast.impl.ListItemCompositeNode
import org.intellij.markdown.flavours.commonmark.CommonMarkFlavourDescriptor
import org.jetbrains.dokka.analysis.DokkaResolutionFacade
import org.jetbrains.dokka.links.DRI
import org.jetbrains.dokka.parsers.factories.DocNodesFromIElementFactory
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.idea.kdoc.resolveKDocLink
import org.jetbrains.kotlin.kdoc.parser.KDocKnownTag
import org.jetbrains.kotlin.kdoc.psi.impl.KDocTag
import org.intellij.markdown.parser.MarkdownParser as IntellijMarkdownParser
class MarkdownParser (
private val resolutionFacade: DokkaResolutionFacade,
private val declarationDescriptor: DeclarationDescriptor
) : Parser() {
inner class MarkdownVisitor(val text: String) {
private fun headersHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(
node.type,
visitNode(node.children.find { it.type == MarkdownTokenTypes.ATX_CONTENT }!!).children
)
private fun horizontalRulesHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(MarkdownTokenTypes.HORIZONTAL_RULE)
private fun emphasisHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(
node.type,
children = listOf(visitNode(node.children[node.children.size / 2]))
)
private fun blockquotesHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(node.type, children = node.children.drop(1).map { visitNode(it) })
private fun listsHandler(node: ASTNode): DocTag {
val children = node.children.filterIsInstance<ListItemCompositeNode>().flatMap {
if( it.children.last().type in listOf(MarkdownElementTypes.ORDERED_LIST, MarkdownElementTypes.UNORDERED_LIST) ) {
val nestedList = it.children.last()
(it.children as MutableList).removeAt(it.children.lastIndex)
listOf(it, nestedList)
}
else
listOf(it)
}
return DocNodesFromIElementFactory.getInstance(
node.type,
children =
children
.map {
if(it.type == MarkdownElementTypes.LIST_ITEM)
DocNodesFromIElementFactory.getInstance(
it.type,
children = it
.children
.drop(1)
.evaluateChildren()
)
else
visitNode(it)
},
params =
if (node.type == MarkdownElementTypes.ORDERED_LIST) {
val listNumberNode = node.children.first().children.first()
mapOf("start" to text.substring(listNumberNode.startOffset, listNumberNode.endOffset).dropLast(2))
} else
emptyMap()
)
}
private fun linksHandler(node: ASTNode): DocTag {
val linkNode = node.children.find { it.type == MarkdownElementTypes.LINK_LABEL }!!
val link = text.substring(linkNode.startOffset+1, linkNode.endOffset-1)
val dri: DRI? = if (link.startsWith("http") || link.startsWith("www")) {
null
} else {
DRI.from(
resolveKDocLink(
resolutionFacade.resolveSession.bindingContext,
resolutionFacade,
declarationDescriptor,
null,
link.split('.')
).single()
)
}
val href = mapOf("href" to link)
return when (node.type) {
MarkdownElementTypes.FULL_REFERENCE_LINK -> DocNodesFromIElementFactory.getInstance(node.type, params = href, children = node.children.find { it.type == MarkdownElementTypes.LINK_TEXT }!!.children.drop(1).dropLast(1).evaluateChildren(), dri = dri)
else -> DocNodesFromIElementFactory.getInstance(node.type, params = href, children = listOf(visitNode(linkNode)), dri = dri)
}
}
private fun imagesHandler(node: ASTNode): DocTag {
val linkNode =
node.children.last().children.find { it.type == MarkdownElementTypes.LINK_LABEL }!!.children[1]
val link = text.substring(linkNode.startOffset, linkNode.endOffset)
val src = mapOf("src" to link)
return DocNodesFromIElementFactory.getInstance(node.type, params = src, children = listOf(visitNode(node.children.last().children.find { it.type == MarkdownElementTypes.LINK_TEXT }!!)))
}
private fun codeSpansHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(
node.type,
children = listOf(
DocNodesFromIElementFactory.getInstance(
MarkdownTokenTypes.TEXT,
body = text.substring(node.startOffset+1, node.endOffset-1).replace('\n', ' ').trimIndent()
)
)
)
private fun codeFencesHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(
node.type,
children = node
.children
.filter { it.type == MarkdownTokenTypes.CODE_FENCE_CONTENT }
.map { visitNode(it) },
params = node
.children
.find { it.type == MarkdownTokenTypes.FENCE_LANG }
?.let { mapOf("lang" to text.substring(it.startOffset, it.endOffset)) }
?: emptyMap()
)
private fun codeBlocksHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(node.type, children = node.children.evaluateChildren())
private fun defaultHandler(node: ASTNode): DocTag =
DocNodesFromIElementFactory.getInstance(
MarkdownElementTypes.PARAGRAPH,
children = node.children.evaluateChildren())
fun visitNode(node: ASTNode): DocTag =
when (node.type) {
MarkdownElementTypes.ATX_1,
MarkdownElementTypes.ATX_2,
MarkdownElementTypes.ATX_3,
MarkdownElementTypes.ATX_4,
MarkdownElementTypes.ATX_5,
MarkdownElementTypes.ATX_6 -> headersHandler(node)
MarkdownTokenTypes.HORIZONTAL_RULE -> horizontalRulesHandler(node)
MarkdownElementTypes.STRONG,
MarkdownElementTypes.EMPH -> emphasisHandler(node)
MarkdownElementTypes.FULL_REFERENCE_LINK,
MarkdownElementTypes.SHORT_REFERENCE_LINK -> linksHandler(node)
MarkdownElementTypes.BLOCK_QUOTE -> blockquotesHandler(node)
MarkdownElementTypes.UNORDERED_LIST,
MarkdownElementTypes.ORDERED_LIST -> listsHandler(node)
MarkdownElementTypes.CODE_BLOCK -> codeBlocksHandler(node)
MarkdownElementTypes.CODE_FENCE -> codeFencesHandler(node)
MarkdownElementTypes.CODE_SPAN -> codeSpansHandler(node)
MarkdownElementTypes.IMAGE -> imagesHandler(node)
MarkdownTokenTypes.CODE_FENCE_CONTENT,
MarkdownTokenTypes.CODE_LINE,
MarkdownTokenTypes.TEXT -> DocNodesFromIElementFactory.getInstance(MarkdownTokenTypes.TEXT, body = text.substring(node.startOffset, node.endOffset))
else -> defaultHandler(node)
}
private fun List<ASTNode>.evaluateChildren(): List<DocTag> =
this.filter { it is CompositeASTNode || it.type == MarkdownTokenTypes.TEXT }.map { visitNode(it) }
}
private fun markdownToDocNode(text: String): DocTag {
val flavourDescriptor = CommonMarkFlavourDescriptor()
val markdownAstRoot: ASTNode = IntellijMarkdownParser(flavourDescriptor).buildMarkdownTreeFromString(text)
return MarkdownVisitor(text).visitNode(markdownAstRoot)
}
override fun parseStringToDocNode(extractedString: String) = markdownToDocNode(extractedString)
override fun preparse(text: String) = text
fun parseFromKDocTag(kDocTag: KDocTag?): DocumentationNode {
return if(kDocTag == null)
DocumentationNode(emptyList())
else
DocumentationNode(
(listOf(kDocTag) + kDocTag.children).filterIsInstance<KDocTag>().map {
when (it.knownTag) {
null -> if (it.name == null) Description(parseStringToDocNode(it.getContent())) else CustomWrapperTag(
parseStringToDocNode(it.getContent()),
it.name!!
)
KDocKnownTag.AUTHOR -> Author(parseStringToDocNode(it.getContent()))
KDocKnownTag.THROWS -> Throws(parseStringToDocNode(it.getContent()), it.getSubjectName()!!)
KDocKnownTag.EXCEPTION -> Throws(parseStringToDocNode(it.getContent()), it.getSubjectName()!!)
KDocKnownTag.PARAM -> Param(parseStringToDocNode(it.getContent()), it.getSubjectName()!!)
KDocKnownTag.RECEIVER -> Receiver(parseStringToDocNode(it.getContent()))
KDocKnownTag.RETURN -> Return(parseStringToDocNode(it.getContent()))
KDocKnownTag.SEE -> See(parseStringToDocNode(it.getContent()), it.getSubjectName()!!)
KDocKnownTag.SINCE -> Since(parseStringToDocNode(it.getContent()))
KDocKnownTag.CONSTRUCTOR -> Constructor(parseStringToDocNode(it.getContent()))
KDocKnownTag.PROPERTY -> Property(parseStringToDocNode(it.getContent()), it.getSubjectName()!!)
KDocKnownTag.SAMPLE -> Sample(parseStringToDocNode(it.getContent()), it.getSubjectName()!!)
KDocKnownTag.SUPPRESS -> Suppress(parseStringToDocNode(it.getContent()))
}
}
)
}
}
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