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package org.jetbrains.dokka.Samples
import com.google.inject.Inject
import com.intellij.psi.PsiElement
import org.jetbrains.dokka.*
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.descriptors.PackageViewDescriptor
import org.jetbrains.kotlin.idea.kdoc.getKDocLinkResolutionScope
import org.jetbrains.kotlin.idea.kdoc.resolveKDocLink
import org.jetbrains.kotlin.kdoc.psi.impl.KDocTag
import org.jetbrains.kotlin.name.Name
import org.jetbrains.kotlin.psi.KtBlockExpression
import org.jetbrains.kotlin.psi.KtDeclarationWithBody
import org.jetbrains.kotlin.psi.KtFile
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
import org.jetbrains.kotlin.resolve.scopes.ResolutionScope
open class DefaultSampleProcessingService
@Inject constructor(val configuration: DokkaConfiguration,
val logger: DokkaLogger,
val resolutionFacade: DokkaResolutionFacade)
: SampleProcessingService {
override fun resolveSample(descriptor: DeclarationDescriptor, functionName: String?, kdocTag: KDocTag): ContentNode {
if (functionName == null) {
logger.warn("Missing function name in @sample in ${descriptor.signature()}")
return ContentBlockSampleCode().apply { append(ContentText("//Missing function name in @sample")) }
}
val bindingContext = BindingContext.EMPTY
val symbol = resolveKDocLink(bindingContext, resolutionFacade, descriptor, kdocTag, functionName.split(".")).firstOrNull()
if (symbol == null) {
logger.warn("Unresolved function $functionName in @sample in ${descriptor.signature()}")
return ContentBlockSampleCode().apply { append(ContentText("//Unresolved: $functionName")) }
}
val psiElement = DescriptorToSourceUtils.descriptorToDeclaration(symbol)
if (psiElement == null) {
logger.warn("Can't find source for function $functionName in @sample in ${descriptor.signature()}")
return ContentBlockSampleCode().apply { append(ContentText("//Source not found: $functionName")) }
}
val text = processSampleBody(psiElement).trim { it == '\n' || it == '\r' }.trimEnd()
val lines = text.split("\n")
val indent = lines.filter(String::isNotBlank).map { it.takeWhile(Char::isWhitespace).count() }.min() ?: 0
val finalText = lines.joinToString("\n") { it.drop(indent) }
return ContentBlockSampleCode(importsBlock = processImports(psiElement)).apply { append(ContentText(finalText)) }
}
protected open fun processSampleBody(psiElement: PsiElement): String = when (psiElement) {
is KtDeclarationWithBody -> {
val bodyExpression = psiElement.bodyExpression
when (bodyExpression) {
is KtBlockExpression -> bodyExpression.text.removeSurrounding("{", "}")
else -> bodyExpression!!.text
}
}
else -> psiElement.text
}
protected open fun processImports(psiElement: PsiElement): ContentBlockCode {
val psiFile = psiElement.containingFile
if (psiFile is KtFile) {
return ContentBlockCode("kotlin").apply {
append(ContentText(psiFile.importList?.text ?: ""))
}
} else {
return ContentBlockCode("")
}
}
private fun resolveInScope(functionName: String, scope: ResolutionScope): DeclarationDescriptor? {
var currentScope = scope
val parts = functionName.split('.')
var symbol: DeclarationDescriptor? = null
for (part in parts) {
// short name
val symbolName = Name.identifier(part)
val partSymbol = currentScope.getContributedDescriptors(DescriptorKindFilter.ALL) { it == symbolName }.firstOrNull { it.name == symbolName }
if (partSymbol == null) {
symbol = null
break
}
@Suppress("IfThenToElvis")
currentScope = if (partSymbol is ClassDescriptor)
partSymbol.defaultType.memberScope
else if (partSymbol is PackageViewDescriptor)
partSymbol.memberScope
else
getKDocLinkResolutionScope(resolutionFacade, partSymbol)
symbol = partSymbol
}
return symbol
}
}
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