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package org.jetbrains.dokka.Generation
import org.jetbrains.dokka.*
class DocumentationMerger(
private val documentationModules: List<DocumentationModule>,
val logger: DokkaLogger
) {
private val producedNodeRefGraph: NodeReferenceGraph = NodeReferenceGraph()
private val signatureMap: Map<DocumentationNode, String>
private val oldToNewNodeMap: MutableMap<DocumentationNode, DocumentationNode> = mutableMapOf()
init {
if (documentationModules.groupBy { it.name }.size > 1) {
throw IllegalArgumentException("Modules should have similar names: ${documentationModules.joinToString(", ") {it.name}}")
}
signatureMap = documentationModules
.flatMap { it.nodeRefGraph.nodeMapView.entries }
.associate { (k, v) -> v to k }
documentationModules.map { it.nodeRefGraph }
.flatMap { it.references }
.forEach { producedNodeRefGraph.addReference(it) }
}
private fun mergePackageReferences(
from: DocumentationNode,
packages: List<DocumentationReference>
): List<DocumentationReference> {
val packagesByName = packages
.map { it.to }
.groupBy { it.name }
val resultReferences = mutableListOf<DocumentationReference>()
for ((name, listOfPackages) in packagesByName) {
try {
val producedPackage = mergePackagesWithEqualNames(name, from, listOfPackages)
updatePendingReferences()
resultReferences.add(
DocumentationReference(from, producedPackage, RefKind.Member)
)
} catch (t: Throwable) {
val entries = listOfPackages.joinToString(",") { "references:${it.allReferences().size}" }
throw Error("Failed to merge package $name from $from with entries $entries. ${t.message}", t)
}
}
return resultReferences
}
private fun mergePackagesWithEqualNames(
name: String,
from: DocumentationNode,
packages: List<DocumentationNode>
): DocumentationNode {
val mergedPackage = DocumentationNode(name, Content.Empty, NodeKind.Package)
for (contentToAppend in packages.map { it.content }.distinct()) {
mergedPackage.updateContent {
for (otherChild in contentToAppend.children) {
children.add(otherChild)
}
}
}
for (node in packages) {
oldToNewNodeMap[node] = mergedPackage
}
val references = packages.flatMap { it.allReferences() }
val mergedReferences = mergeReferences(mergedPackage, references)
for (ref in mergedReferences) {
if (ref.kind == RefKind.Owner) {
continue
}
mergedPackage.addReference(ref)
}
from.append(mergedPackage, RefKind.Member)
return mergedPackage
}
private fun mergeMemberGroupBy(it: DocumentationNode): String {
val signature = signatureMap[it]
if (signature != null) {
return signature
}
logger.error("Failed to find signature for $it in \n${it.allReferences().joinToString { "\n ${it.kind} ${it.to}" }}")
return "<ERROR>"
}
private fun mergeMemberReferences(
from: DocumentationNode,
refs: List<DocumentationReference>
): List<DocumentationReference> {
val membersBySignature: Map<String, List<DocumentationNode>> = refs.map { it.to }
.groupBy(this::mergeMemberGroupBy)
val mergedMembers: MutableList<DocumentationReference> = mutableListOf()
for ((signature, members) in membersBySignature) {
val newNode = mergeMembersWithEqualSignature(signature, members)
producedNodeRefGraph.register(signature, newNode)
updatePendingReferences()
from.append(newNode, RefKind.Member)
mergedMembers.add(DocumentationReference(from, newNode, RefKind.Member))
}
return mergedMembers
}
private fun mergeMembersWithEqualSignature(
signature: String,
nodes: List<DocumentationNode>
): DocumentationNode {
val singleNode = nodes.singleOrNull()
if (singleNode != null) {
singleNode.dropReferences { it.kind == RefKind.Owner }
return singleNode
}
val groupNode = DocumentationNode(nodes.first().name, Content.Empty, NodeKind.GroupNode)
groupNode.appendTextNode(signature, NodeKind.Signature, RefKind.Detail)
for (node in nodes) {
node.dropReferences { it.kind == RefKind.Owner }
groupNode.append(node, RefKind.Origin)
oldToNewNodeMap[node] = groupNode
}
// if nodes are classes, nested members should be also merged and
// inserted at the same level with class
if (nodes.all { it.kind == NodeKind.Class }) {
val members = nodes.flatMap { it.allReferences() }.filter { it.kind == RefKind.Member }
val mergedMembers = mergeMemberReferences(groupNode, members)
for (ref in mergedMembers) {
if (ref.kind == RefKind.Owner) {
continue
}
groupNode.append(ref.to, RefKind.Member)
}
}
return groupNode
}
private fun mergeReferences(
from: DocumentationNode,
refs: List<DocumentationReference>
): List<DocumentationReference> {
val (refsToPackages, otherRefs) = refs.partition { it.to.kind == NodeKind.Package }
val mergedPackages = mergePackageReferences(from, refsToPackages)
val (refsToMembers, refsNotToMembers) = otherRefs.partition { it.kind == RefKind.Member }
val mergedMembers = mergeMemberReferences(from, refsToMembers)
return mergedPackages + mergedMembers + refsNotToMembers
}
fun merge(): DocumentationModule {
val mergedDocumentationModule = DocumentationModule(
name = documentationModules.first().name,
nodeRefGraph = producedNodeRefGraph
)
val refs = documentationModules.flatMap {
it.allReferences()
}
mergeReferences(mergedDocumentationModule, refs)
return mergedDocumentationModule
}
private fun updatePendingReferences() {
for (ref in producedNodeRefGraph.references) {
ref.lazyNodeFrom.update()
ref.lazyNodeTo.update()
}
}
private fun NodeResolver.update() {
if (this is NodeResolver.Exact && exactNode in oldToNewNodeMap) {
exactNode = oldToNewNodeMap[exactNode]!!
}
}
}
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