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package org.jetbrains.dokka.Samples
import com.google.inject.Inject
import com.intellij.psi.PsiElement
import com.intellij.psi.PsiWhiteSpace
import com.intellij.psi.impl.source.tree.LeafPsiElement
import com.intellij.psi.util.PsiTreeUtil
import org.jetbrains.dokka.*
import org.jetbrains.kotlin.psi.*
import org.jetbrains.kotlin.psi.psiUtil.allChildren
import org.jetbrains.kotlin.psi.psiUtil.prevLeaf
import org.jetbrains.kotlin.resolve.ImportPath
open class KotlinWebsiteSampleProcessingService
@Inject constructor(dokkaConfiguration: DokkaConfiguration,
logger: DokkaLogger,
resolutionFacade: DokkaResolutionFacade)
: DefaultSampleProcessingService(dokkaConfiguration, logger, resolutionFacade) {
private class SampleBuilder : KtTreeVisitorVoid() {
val builder = StringBuilder()
val text: String
get() = builder.toString()
fun KtValueArgument.extractStringArgumentValue() =
(getArgumentExpression() as KtStringTemplateExpression)
.entries.joinToString("") { it.text }
fun convertAssertPrints(expression: KtCallExpression) {
val (argument, commentArgument) = expression.valueArguments
builder.apply {
append("println(")
append(argument.text)
append(") // ")
append(commentArgument.extractStringArgumentValue())
}
}
fun convertAssertTrueFalse(expression: KtCallExpression, expectedResult: Boolean) {
val (argument) = expression.valueArguments
builder.apply {
expression.valueArguments.getOrNull(1)?.let {
append("// ${it.extractStringArgumentValue()}")
val ws = expression.prevLeaf { it is PsiWhiteSpace }
append(ws?.text ?: "\n")
}
append("println(\"")
append(argument.text)
append(" is \${")
append(argument.text)
append("}\") // $expectedResult")
}
}
fun convertAssertFails(expression: KtCallExpression) {
val (message, funcArgument) = expression.valueArguments
builder.apply {
val argument = if (funcArgument.getArgumentExpression() is KtLambdaExpression)
PsiTreeUtil.findChildOfType(funcArgument, KtBlockExpression::class.java)?.text ?: ""
else
funcArgument.text
append(argument.lines().joinToString(separator = "\n") { "// $it" })
append(" // ")
append(message.extractStringArgumentValue())
append(" will fail")
}
}
fun convertAssertFailsWith(expression: KtCallExpression) {
val (funcArgument) = expression.valueArguments
val (exceptionType) = expression.typeArguments
builder.apply {
val argument = if (funcArgument.firstChild is KtLambdaExpression)
PsiTreeUtil.findChildOfType(funcArgument, KtBlockExpression::class.java)?.text ?: ""
else
funcArgument.text
append(argument.lines().joinToString(separator = "\n") { "// $it" })
append(" // will fail with ")
append(exceptionType.text)
}
}
override fun visitCallExpression(expression: KtCallExpression) {
when (expression.calleeExpression?.text) {
"assertPrints" -> convertAssertPrints(expression)
"assertTrue" -> convertAssertTrueFalse(expression, expectedResult = true)
"assertFalse" -> convertAssertTrueFalse(expression, expectedResult = false)
"assertFails" -> convertAssertFails(expression)
"assertFailsWith" -> convertAssertFailsWith(expression)
else -> super.visitCallExpression(expression)
}
}
override fun visitElement(element: PsiElement) {
if (element is LeafPsiElement)
builder.append(element.text)
super.visitElement(element)
}
}
private fun PsiElement.buildSampleText(): String {
val sampleBuilder = SampleBuilder()
this.accept(sampleBuilder)
return sampleBuilder.text
}
val importsToIgnore = arrayOf("samples.*").map { ImportPath.fromString(it) }
override fun processImports(psiElement: PsiElement): ContentBlockCode {
val psiFile = psiElement.containingFile
if (psiFile is KtFile) {
return ContentBlockCode("kotlin").apply {
append(ContentText("\n"))
psiFile.importList?.let {
it.allChildren.filter {
it !is KtImportDirective || it.importPath !in importsToIgnore
}.forEach { append(ContentText(it.text)) }
}
}
}
return super.processImports(psiElement)
}
override fun processSampleBody(psiElement: PsiElement) = when (psiElement) {
is KtDeclarationWithBody -> {
val bodyExpression = psiElement.bodyExpression
val bodyExpressionText = bodyExpression!!.buildSampleText()
when (bodyExpression) {
is KtBlockExpression -> bodyExpressionText.removeSurrounding("{", "}")
else -> bodyExpressionText
}
}
else -> psiElement.buildSampleText()
}
}
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