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// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.jetbrains.kotlin.idea.quickfix
import com.intellij.codeInsight.intention.HighPriorityAction
import com.intellij.codeInsight.intention.IntentionAction
import com.intellij.openapi.editor.Editor
import com.intellij.openapi.project.Project
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.PropertyDescriptor
import org.jetbrains.kotlin.diagnostics.Diagnostic
import org.jetbrains.kotlin.diagnostics.Errors
import org.jetbrains.kotlin.idea.KotlinBundle
import org.jetbrains.kotlin.idea.caches.resolve.analyze
import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptorIfAny
import org.jetbrains.kotlin.idea.caches.resolve.unsafeResolveToDescriptor
import org.jetbrains.kotlin.idea.core.ShortenReferences
import org.jetbrains.kotlin.idea.core.quickfix.QuickFixUtil
import org.jetbrains.kotlin.idea.intentions.branchedTransformations.isNullExpression
import org.jetbrains.kotlin.idea.references.mainReference
import org.jetbrains.kotlin.idea.util.IdeDescriptorRenderers
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.psi.*
import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm
import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
import org.jetbrains.kotlin.types.ErrorUtils
import org.jetbrains.kotlin.types.KotlinType
import org.jetbrains.kotlin.types.checker.KotlinTypeChecker
import org.jetbrains.kotlin.types.typeUtil.makeNullable
import java.util.*
open class ChangeVariableTypeFix(element: KtCallableDeclaration, type: KotlinType) : KotlinQuickFixAction<KtCallableDeclaration>(element) {
private val typeContainsError = ErrorUtils.containsErrorType(type)
private val typePresentation = IdeDescriptorRenderers.SOURCE_CODE_TYPES_WITH_SHORT_NAMES.renderType(type)
private val typeSourceCode = IdeDescriptorRenderers.SOURCE_CODE_TYPES.renderType(type)
open fun variablePresentation(): String? {
val element = element!!
val name = element.name
return if (name != null) {
val container = element.unsafeResolveToDescriptor().containingDeclaration as? ClassDescriptor
val containerName = container?.name?.takeUnless { it.isSpecial }?.asString()
if (containerName != null) "'$containerName.$name'" else "'$name'"
} else {
null
}
}
override fun getText(): String {
if (element == null) return ""
val variablePresentation = variablePresentation()
return if (variablePresentation != null) {
KotlinBundle.message("change.type.of.0.to.1", variablePresentation, typePresentation)
} else {
KotlinBundle.message("change.type.to.0", typePresentation)
}
}
class OnType(element: KtCallableDeclaration, type: KotlinType) : ChangeVariableTypeFix(element, type), HighPriorityAction {
override fun variablePresentation() = null
}
class ForOverridden(element: KtVariableDeclaration, type: KotlinType) : ChangeVariableTypeFix(element, type) {
override fun variablePresentation(): String? {
val presentation = super.variablePresentation() ?: return null
return KotlinBundle.message("base.property.0", presentation)
}
}
override fun getFamilyName() = KotlinBundle.message("fix.change.return.type.family")
override fun isAvailable(project: Project, editor: Editor?, file: KtFile) = !typeContainsError
override fun invoke(project: Project, editor: Editor?, file: KtFile) {
val element = element ?: return
val psiFactory = KtPsiFactory(file)
assert(element.nameIdentifier != null) { "ChangeVariableTypeFix applied to variable without name" }
val replacingTypeReference = psiFactory.createType(typeSourceCode)
val toShorten = ArrayList<KtTypeReference>()
toShorten.add(element.setTypeReference(replacingTypeReference)!!)
if (element is KtProperty) {
val getterReturnTypeRef = element.getter?.returnTypeReference
if (getterReturnTypeRef != null) {
toShorten.add(getterReturnTypeRef.replace(replacingTypeReference) as KtTypeReference)
}
val setterParameterTypeRef = element.setter?.parameter?.typeReference
if (setterParameterTypeRef != null) {
toShorten.add(setterParameterTypeRef.replace(replacingTypeReference) as KtTypeReference)
}
}
ShortenReferences.DEFAULT.process(toShorten)
}
object ComponentFunctionReturnTypeMismatchFactory : KotlinSingleIntentionActionFactory() {
override fun createAction(diagnostic: Diagnostic): IntentionAction? {
val entry = ChangeCallableReturnTypeFix.getDestructuringDeclarationEntryThatTypeMismatchComponentFunction(diagnostic)
val context = entry.analyze()
val resolvedCall = context.get(BindingContext.COMPONENT_RESOLVED_CALL, entry) ?: return null
if (DescriptorToSourceUtils.descriptorToDeclaration(resolvedCall.candidateDescriptor) == null) return null
val expectedType = resolvedCall.candidateDescriptor.returnType ?: return null
return ChangeVariableTypeFix(entry, expectedType)
}
}
object PropertyOrReturnTypeMismatchOnOverrideFactory : KotlinIntentionActionsFactory() {
override fun doCreateActions(diagnostic: Diagnostic): List<IntentionAction> {
val actions = LinkedList<IntentionAction>()
val element = diagnostic.psiElement as? KtCallableDeclaration
if (element !is KtProperty && element !is KtParameter) return actions
val descriptor = element.resolveToDescriptorIfAny(BodyResolveMode.FULL) as? PropertyDescriptor ?: return actions
var lowerBoundOfOverriddenPropertiesTypes = QuickFixUtil.findLowerBoundOfOverriddenCallablesReturnTypes(descriptor)
val propertyType = descriptor.returnType ?: error("Property type cannot be null if it mismatches something")
val overriddenMismatchingProperties = LinkedList<PropertyDescriptor>()
var canChangeOverriddenPropertyType = true
for (overriddenProperty in descriptor.overriddenDescriptors) {
val overriddenPropertyType = overriddenProperty.returnType
if (overriddenPropertyType != null) {
if (!KotlinTypeChecker.DEFAULT.isSubtypeOf(propertyType, overriddenPropertyType)) {
overriddenMismatchingProperties.add(overriddenProperty)
} else if (overriddenProperty.isVar && !KotlinTypeChecker.DEFAULT.equalTypes(
overriddenPropertyType,
propertyType
)
) {
canChangeOverriddenPropertyType = false
}
if (overriddenProperty.isVar && lowerBoundOfOverriddenPropertiesTypes != null &&
!KotlinTypeChecker.DEFAULT.equalTypes(lowerBoundOfOverriddenPropertiesTypes, overriddenPropertyType)
) {
lowerBoundOfOverriddenPropertiesTypes = null
}
}
}
if (lowerBoundOfOverriddenPropertiesTypes != null) {
actions.add(OnType(element, lowerBoundOfOverriddenPropertiesTypes))
}
if (overriddenMismatchingProperties.size == 1 && canChangeOverriddenPropertyType) {
val overriddenProperty = DescriptorToSourceUtils.descriptorToDeclaration(overriddenMismatchingProperties.single())
if (overriddenProperty is KtProperty) {
actions.add(ForOverridden(overriddenProperty, propertyType))
}
}
return actions
}
}
object VariableInitializedWithNullFactory : KotlinSingleIntentionActionFactory() {
override fun createAction(diagnostic: Diagnostic): IntentionAction? {
val binaryExpression = diagnostic.psiElement.getStrictParentOfType<KtBinaryExpression>() ?: return null
val left = binaryExpression.left ?: return null
if (binaryExpression.operationToken != KtTokens.EQ) return null
val property = left.mainReference?.resolve() as? KtProperty ?: return null
if (!property.isVar || property.typeReference != null || !property.initializer.isNullExpression()) return null
val actualType = when (diagnostic.factory) {
Errors.TYPE_MISMATCH -> Errors.TYPE_MISMATCH.cast(diagnostic).b
Errors.TYPE_MISMATCH_WARNING -> Errors.TYPE_MISMATCH_WARNING.cast(diagnostic).b
ErrorsJvm.NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS ->
ErrorsJvm.NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS.cast(diagnostic).b
else -> null
} ?: return null
return ChangeVariableTypeFix(property, actualType.makeNullable())
}
}
}
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