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package org.jetbrains.dokka.base.resolvers.local
import org.jetbrains.dokka.base.renderers.sourceSets
import org.jetbrains.dokka.base.resolvers.anchors.SymbolAnchorHint
import org.jetbrains.dokka.links.DRI
import org.jetbrains.dokka.links.PointingToDeclaration
import org.jetbrains.dokka.model.DisplaySourceSet
import org.jetbrains.dokka.model.withDescendants
import org.jetbrains.dokka.pages.*
import org.jetbrains.dokka.plugability.DokkaContext
import java.util.*
open class DokkaLocationProvider(
pageGraphRoot: RootPageNode,
dokkaContext: DokkaContext,
extension: String = ".html"
) : DefaultLocationProvider(pageGraphRoot, dokkaContext, extension) {
protected open val PAGE_WITH_CHILDREN_SUFFIX = "index"
protected open val pathsIndex: Map<PageNode, List<String>> = IdentityHashMap<PageNode, List<String>>().apply {
fun registerPath(page: PageNode, prefix: List<String>) {
val newPrefix = prefix + page.pathName
put(page, newPrefix)
page.children.forEach { registerPath(it, newPrefix) }
}
put(pageGraphRoot, emptyList())
pageGraphRoot.children.forEach { registerPath(it, emptyList()) }
}
protected val pagesIndex: Map<Pair<DRI, DisplaySourceSet?>, ContentPage> =
pageGraphRoot.withDescendants().filterIsInstance<ContentPage>()
.flatMap { page ->
page.dri.flatMap { dri ->
page.sourceSets().ifEmpty { setOf(null) }.map { sourceSet -> (dri to sourceSet) to page }
}
}
.groupingBy { it.first }
.aggregate { key, _, (_, page), first ->
if (first) page else throw AssertionError("Multiple pages associated with key: ${key.first}/${key.second}")
}
protected val anchorsIndex: Map<Pair<DRI, DisplaySourceSet?>, ContentPage> =
pageGraphRoot.withDescendants().filterIsInstance<ContentPage>()
.flatMap { page ->
page.content.withDescendants()
.filter { it.extra[SymbolAnchorHint] != null }
.mapNotNull { it.dci.dri.singleOrNull() }
.distinct()
.flatMap { dri ->
page.sourceSets().ifEmpty { setOf(null) }.map { sourceSet ->
(dri to sourceSet) to page
}
}
}.toMap()
override fun resolve(node: PageNode, context: PageNode?, skipExtension: Boolean) =
pathTo(node, context) + if (!skipExtension) extension else ""
override fun resolve(dri: DRI, sourceSets: Set<DisplaySourceSet>, context: PageNode?): String? =
sourceSets.ifEmpty { setOf(null) }.mapNotNull { sourceSet ->
val driWithSourceSet = Pair(dri, sourceSet)
getLocalLocation(driWithSourceSet, context)
?: getLocalLocation(driWithSourceSet.copy(first = dri.copy(target = PointingToDeclaration)), context)
// Not found in PageGraph, that means it's an external link
?: getExternalLocation(dri, sourceSets)
?: getExternalLocation(dri.copy(target = PointingToDeclaration), sourceSets)
}.distinct().singleOrNull()
private fun getLocalLocation(dri: Pair<DRI, DisplaySourceSet?>, context: PageNode?): String? =
pagesIndex[dri]?.let { resolve(it, context) }
?: anchorsIndex[dri]?.let { resolve(it, context) + "#${dri.first}" }
override fun pathToRoot(from: PageNode): String =
pathTo(pageGraphRoot, from).removeSuffix(PAGE_WITH_CHILDREN_SUFFIX)
override fun ancestors(node: PageNode): List<PageNode> =
generateSequence(node) { it.parent() }.toList()
protected open fun pathTo(node: PageNode, context: PageNode?): String {
fun pathFor(page: PageNode) = pathsIndex[page] ?: throw AssertionError(
"${page::class.simpleName}(${page.name}) does not belong to the current page graph so it is impossible to compute its path"
)
val contextNode =
if (context !is ClasslikePageNode && context?.children?.isEmpty() == true && context.parent() != null) context.parent() else context
val nodePath = pathFor(node)
val contextPath = contextNode?.let { pathFor(it) }.orEmpty()
val commonPathElements = nodePath.asSequence().zip(contextPath.asSequence())
.takeWhile { (a, b) -> a == b }.count()
return (List(contextPath.size - commonPathElements) { ".." } + nodePath.drop(commonPathElements) +
if (node is ClasslikePageNode || node.children.isNotEmpty())
listOf(PAGE_WITH_CHILDREN_SUFFIX)
else
emptyList()
).joinToString("/")
}
private fun PageNode.parent() = pageGraphRoot.parentMap[this]
private val PageNode.pathName: String
get() = if (this is PackagePageNode) name else identifierToFilename(name)
companion object {
internal val reservedFilenames = setOf("index", "con", "aux", "lst", "prn", "nul", "eof", "inp", "out")
internal fun identifierToFilename(name: String): String {
if (name.isEmpty()) return "--root--"
val escaped = name.replace("[<>]".toRegex(), "-")
val lowercase = escaped.replace("[A-Z]".toRegex()) { matchResult -> "-" + matchResult.value.toLowerCase() }
return if (lowercase in reservedFilenames) "--$lowercase--" else lowercase
}
}
}
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