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RsAliasIndex.kt
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RsAliasIndex.kt
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/*
* Use of this source code is governed by the MIT license that can be
* found in the LICENSE file.
*/
package org.rust.lang.core.resolve.indexes
import com.intellij.openapi.fileTypes.FileType
import com.intellij.openapi.project.Project
import com.intellij.psi.stubs.StubTree
import com.intellij.psi.stubs.StubTreeBuilder
import com.intellij.util.indexing.*
import com.intellij.util.io.DataExternalizer
import com.intellij.util.io.KeyDescriptor
import com.intellij.util.io.externalizer.StringCollectionExternalizer
import org.rust.ide.search.RsWithMacrosProjectScope
import org.rust.lang.RsFileType
import org.rust.lang.core.macros.MacroExpansionStubsProvider
import org.rust.lang.core.psi.RsFile
import org.rust.lang.core.psi.ext.PathKind
import org.rust.lang.core.psi.ext.RsAbstractableOwner
import org.rust.lang.core.psi.ext.ownerBySyntaxOnly
import org.rust.lang.core.stubs.RsAliasStub
import org.rust.lang.core.stubs.RsFileStub
import org.rust.lang.core.stubs.RsTypeAliasStub
import org.rust.lang.core.stubs.RsUseSpeckStub
import org.rust.lang.core.types.TyFingerprint
import org.rust.openapiext.toPsiFile
class RsAliasIndex : FileBasedIndexExtension<TyFingerprint, List<String>>() {
override fun getName(): ID<TyFingerprint, List<String>> = KEY
override fun getIndexer() = object : DataIndexer<TyFingerprint, List<String>, FileContent> {
override fun map(inputData: FileContent): Map<TyFingerprint, List<String>> {
val stubTree = getStubTree(inputData) ?: return emptyMap()
val map = hashMapOf<TyFingerprint, MutableList<String>>()
for (stub in stubTree.plainList) {
when (stub) {
is RsTypeAliasStub -> {
val psi = stub.psi
if (psi.ownerBySyntaxOnly !is RsAbstractableOwner.Impl) {
val aliasedName = stub.name ?: continue
val typeRef = psi.typeReference ?: continue
for (tyf in TyFingerprint.create(typeRef, emptyList())) {
map.getOrPut(tyf) { mutableListOf() } += aliasedName
}
}
}
is RsAliasStub -> {
val aliasedName = stub.name ?: continue
// `use foo::bar as baz`
// ` //~~~ this name`:
val parentUseSpeckName = (stub.parentStub as? RsUseSpeckStub)
?.takeIf { !it.isStarImport }
?.path
?.takeIf { it.kind == PathKind.IDENTIFIER }
?.referenceName
?: continue
map.getOrPut(TyFingerprint(parentUseSpeckName)) { mutableListOf() } += aliasedName
}
}
}
return map
}
}
override fun getKeyDescriptor(): KeyDescriptor<TyFingerprint> = TyFingerprint.KeyDescriptor
override fun getValueExternalizer(): DataExternalizer<List<String>> = StringCollectionExternalizer.STRING_LIST_EXTERNALIZER
override fun getVersion(): Int = RsFileStub.Type.stubVersion
override fun getInputFilter(): FileBasedIndex.InputFilter = DefaultFileTypeSpecificInputFilter(RsFileType)
override fun dependsOnFileContent(): Boolean = true
/**
* Hacky adjust the file limit for Rust file.
* Coupled with [org.rust.lang.core.psi.RsFileViewProviderFactory]
*/
override fun getFileTypesWithSizeLimitNotApplicable(): Collection<FileType> {
return listOf(RsFileType)
}
companion object {
fun findPotentialAliases(
project: Project,
tyf: TyFingerprint,
): List<String> {
val result = hashSetOf<String>()
FileBasedIndex.getInstance().processValues(
KEY,
tyf,
null,
{ file, value ->
val psi = file.toPsiFile(project) as? RsFile
if (psi != null) {
val crates = psi.crates
if (crates.isNotEmpty()) {
result += value
}
}
true
},
RsWithMacrosProjectScope(project)
)
return result.toList()
}
private fun getStubTree(inputData: FileContent): StubTree? {
val rootStub = MacroExpansionStubsProvider.findStubForMacroExpansionFile(inputData)
?: StubTreeBuilder.buildStubTree(inputData)
return if (rootStub is RsFileStub) StubTree(rootStub) else null
}
private val KEY: ID<TyFingerprint, List<String>> = ID.create("org.rust.lang.core.resolve.indexes.RsAliasIndex")
}
}