Resource Bundles: Implement references on Kotlin string literals

#KT-6946 In Progress

compiler/frontend/src/org/jetbrains/kotlin/psi/psiUtil/jetPsiUtil.kt

@@ -405,3 +405,5 @@ public fun JetDeclaration.visibilityModifier(): PsiElement? {
 
 public fun JetDeclaration.visibilityModifierType(): JetModifierKeywordToken?
         = visibilityModifier()?.node?.elementType as JetModifierKeywordToken?
+
+public fun JetStringTemplateExpression.isPlain() = entries.all { it is JetLiteralStringTemplateEntry }

compiler/tests/org/jetbrains/kotlin/test/InTextDirectivesUtils.java

@@ -158,7 +158,7 @@ public final class InTextDirectivesUtils {
         List<String> resultPrefixes = Lists.newArrayList();
 
         for (String prefix : prefixes) {
-            if (prefix.startsWith("//")) {
+            if (prefix.startsWith("//") || prefix.startsWith("##")) {
                 resultPrefixes.add(StringUtil.trimLeading(prefix.substring(2)));
             }
             else {
@@ -181,7 +181,7 @@ public final class InTextDirectivesUtils {
 
                 while ((line = reader.readLine()) != null) {
                     line = line.trim();
-                    if (line.startsWith("//")) {
+                    if (line.startsWith("//") || line.startsWith("##")) {
                         String uncommentedLine = line.substring(2).trim();
                         if (!uncommentedLine.isEmpty()) {
                             result.add(uncommentedLine);

generators/src/org/jetbrains/kotlin/generators/tests/GenerateTests.kt

@@ -525,6 +525,7 @@ fun main(args: Array<String>) {
         testClass(javaClass<AbstractJetFindUsagesTest>()) {
             model("findUsages/kotlin", pattern = """^(.+)\.0\.kt$""")
             model("findUsages/java", pattern = """^(.+)\.0\.java$""")
+            model("findUsages/propertyFiles", pattern = """^(.+)\.0\.properties$""")
         }
 
         testClass(javaClass<AbstractKotlinFindUsagesWithLibraryTest>()) {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/findUsages/UsageTypeUtils.kt

@@ -17,22 +17,17 @@
 package org.jetbrains.kotlin.idea.findUsages
 
 import com.intellij.psi.PsiElement
-import org.jetbrains.kotlin.lexer.JetTokens
-import org.jetbrains.kotlin.descriptors.FunctionDescriptor
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.descriptors.ConstructorDescriptor
-import org.jetbrains.kotlin.descriptors.ClassifierDescriptor
-import org.jetbrains.kotlin.descriptors.ClassDescriptor
-import org.jetbrains.kotlin.descriptors.ClassKind
-import org.jetbrains.kotlin.descriptors.PackageViewDescriptor
 import com.intellij.psi.PsiPackage
-import com.intellij.psi.PsiReferenceExpression
-import org.jetbrains.kotlin.descriptors.VariableDescriptor
-import org.jetbrains.kotlin.idea.findUsages.UsageTypeEnum.*
+import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.findUsages.UsageTypeEnum.*
 import org.jetbrains.kotlin.idea.references.*
+import org.jetbrains.kotlin.lexer.JetTokens
 import org.jetbrains.kotlin.psi.*
-import org.jetbrains.kotlin.psi.psiUtil.*
+import org.jetbrains.kotlin.psi.psiUtil.getNonStrictParentOfType
+import org.jetbrains.kotlin.psi.psiUtil.getParentOfTypeAndBranch
+import org.jetbrains.kotlin.psi.psiUtil.isAncestor
+import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 
 public object UsageTypeUtils {
@@ -41,6 +36,7 @@ public object UsageTypeUtils {
             is JetForExpression -> return IMPLICIT_ITERATION
             is JetMultiDeclaration -> return READ
             is JetPropertyDelegate -> return PROPERTY_DELEGATION
+            is JetStringTemplateExpression -> return USAGE_IN_STRING_LITERAL
         }
 
         val refExpr = element?.getNonStrictParentOfType<JetReferenceExpression>()
@@ -249,5 +245,7 @@ enum class UsageTypeEnum {
     CLASS_CAST_TO,
     ANNOTATION,
     CLASS_NEW_OPERATOR,
-    NAMED_ARGUMENT
+    NAMED_ARGUMENT,
+
+    USAGE_IN_STRING_LITERAL
 }

idea/src/META-INF/plugin.xml

@@ -361,6 +361,7 @@
     <weigher key="completion" implementationClass="org.jetbrains.kotlin.idea.completion.KotlinLookupElementProximityWeigher" id="kotlin.proximity" order="after proximity"/>
 
     <psi.referenceContributor language="jet" implementation="org.jetbrains.kotlin.idea.references.JetReferenceContributor"/>
+    <psi.referenceContributor language="jet" implementation="org.jetbrains.kotlin.idea.properties.KotlinPropertiesReferenceContributor"/>
 
     <renamePsiElementProcessor id="KotlinClass"
                                implementation="org.jetbrains.kotlin.idea.refactoring.rename.RenameKotlinClassProcessor"

idea/src/org/jetbrains/kotlin/idea/findUsages/JetUsageTypeProvider.kt

@@ -72,6 +72,8 @@ public object JetUsageTypeProvider : UsageTypeProviderEx {
             ANNOTATION -> UsageType.ANNOTATION
             CLASS_NEW_OPERATOR -> UsageType.CLASS_NEW_OPERATOR
             NAMED_ARGUMENT -> JetUsageTypes.NAMED_ARGUMENT
+
+            USAGE_IN_STRING_LITERAL -> UsageType.LITERAL_USAGE
         }
     }
 }

idea/src/org/jetbrains/kotlin/idea/properties/KotlinPropertiesReferenceContributor.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.properties
+
+import com.intellij.patterns.PlatformPatterns
+import com.intellij.psi.PsiReferenceContributor
+import com.intellij.psi.PsiReferenceRegistrar
+import org.jetbrains.kotlin.psi.JetLiteralStringTemplateEntry
+import org.jetbrains.kotlin.psi.JetStringTemplateExpression
+
+public class KotlinPropertiesReferenceContributor : PsiReferenceContributor() {
+    override fun registerReferenceProviders(registrar: PsiReferenceRegistrar) {
+        registrar.registerReferenceProvider(
+                PlatformPatterns.psiElement(JetStringTemplateExpression::class.java),
+                KotlinPropertyKeyReferenceProvider
+        )
+
+        registrar.registerReferenceProvider(
+                PlatformPatterns.psiElement(JetStringTemplateExpression::class.java),
+                KotlinResourceBundleNameReferenceProvider
+        )
+    }
+}

idea/src/org/jetbrains/kotlin/idea/properties/referenceProviders.kt

@@ -0,0 +1,142 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.properties
+
+import com.intellij.codeInsight.AnnotationUtil
+import com.intellij.lang.properties.ResourceBundleReference
+import com.intellij.lang.properties.references.PropertyReference
+import com.intellij.psi.ElementManipulators
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiReference
+import com.intellij.psi.PsiReferenceProvider
+import com.intellij.psi.search.LocalSearchScope
+import com.intellij.util.ProcessingContext
+import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.descriptors.ConstructorDescriptor
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
+import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget
+import org.jetbrains.kotlin.descriptors.annotations.Annotations
+import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptor
+import org.jetbrains.kotlin.idea.imports.importableFqName
+import org.jetbrains.kotlin.idea.references.mainReference
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.psi.psiUtil.anyDescendantOfType
+import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
+import org.jetbrains.kotlin.psi.psiUtil.isPlain
+import org.jetbrains.kotlin.resolve.calls.callUtil.getParentResolvedCall
+import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
+import org.jetbrains.kotlin.resolve.calls.model.ArgumentMatch
+import org.jetbrains.kotlin.resolve.calls.model.ExpressionValueArgument
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
+import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
+import org.jetbrains.kotlin.resolve.scopes.receivers.ExpressionReceiver
+
+private val PROPERTY_KEY = FqName(AnnotationUtil.PROPERTY_KEY)
+private val PROPERTY_KEY_RESOURCE_BUNDLE = Name.identifier(AnnotationUtil.PROPERTY_KEY_RESOURCE_BUNDLE_PARAMETER)
+
+private fun AnnotationDescriptor.getBundleName(): String? {
+    return allValueArguments.entrySet().singleOrNull { it.key.name == PROPERTY_KEY_RESOURCE_BUNDLE }?.value?.value as? String
+}
+
+private fun DeclarationDescriptor.getBundleNameByAnnotation(): String? {
+    return (annotations.findAnnotation(PROPERTY_KEY) ?: annotations.findExternalAnnotation(PROPERTY_KEY))?.getBundleName()
+}
+
+private fun JetExpression.getBundleNameByContext(): String? {
+    val expression = JetPsiUtil.safeDeparenthesize(this)
+    val parent = expression.parent
+
+    (parent as? JetProperty)?.let { return it.resolveToDescriptor().getBundleNameByAnnotation() }
+
+    val bindingContext = expression.analyze(BodyResolveMode.PARTIAL)
+    val resolvedCall =
+            if (parent is JetQualifiedExpression && expression == parent.receiverExpression) {
+                parent.selectorExpression.getResolvedCall(bindingContext)
+            }
+            else {
+                expression.getParentResolvedCall(bindingContext)
+            } ?: return null
+    val callable = resolvedCall.resultingDescriptor
+
+    if ((resolvedCall.extensionReceiver as? ExpressionReceiver)?.expression == expression) {
+        val returnTypeAnnotations = callable.returnType?.annotations ?: return null
+        return Annotations
+                .findUseSiteTargetedAnnotation(returnTypeAnnotations, AnnotationUseSiteTarget.RECEIVER, PROPERTY_KEY)
+                ?.getBundleName()
+    }
+
+    return resolvedCall.valueArguments.entrySet()
+            .singleOrNull { it.value.arguments.any { it.getArgumentExpression() == expression } }
+            ?.key
+            ?.getBundleNameByAnnotation()
+}
+
+private fun JetAnnotationEntry.getPropertyKeyResolvedCall(): ResolvedCall<*>? {
+    val resolvedCall = getResolvedCall(analyze(BodyResolveMode.PARTIAL)) ?: return null
+    val klass = (resolvedCall.resultingDescriptor as? ConstructorDescriptor)?.containingDeclaration ?: return null
+    if (klass.kind != ClassKind.ANNOTATION_CLASS || klass.importableFqName != PROPERTY_KEY) return null
+    return resolvedCall
+}
+
+private fun JetStringTemplateExpression.isBundleName(): Boolean {
+    val parent = JetPsiUtil.safeDeparenthesize(this).parent
+    when (parent) {
+        is JetValueArgument -> {
+            val resolvedCall = parent.getStrictParentOfType<JetAnnotationEntry>()?.getPropertyKeyResolvedCall() ?: return false
+            val valueParameter = (resolvedCall.getArgumentMapping(parent) as? ArgumentMatch)?.valueParameter ?: return false
+            if (valueParameter.name != PROPERTY_KEY_RESOURCE_BUNDLE) return false
+
+            return true
+        }
+
+        is JetProperty -> {
+            val contexts = (parent.useScope as? LocalSearchScope)?.scope ?: arrayOf(parent.containingFile)
+            return contexts.any {
+                it.anyDescendantOfType<JetAnnotationEntry> f@ { entry ->
+                    if (!entry.valueArguments.any { it.getArgumentName()?.asName == PROPERTY_KEY_RESOURCE_BUNDLE }) return@f false
+                    val resolvedCall = entry.getPropertyKeyResolvedCall() ?: return@f false
+                    val parameter = resolvedCall.resultingDescriptor.valueParameters.singleOrNull { it.name == PROPERTY_KEY_RESOURCE_BUNDLE }
+                                    ?: return@f false
+                    val valueArgument = resolvedCall.valueArguments[parameter] as? ExpressionValueArgument ?: return@f false
+                    val bundleNameExpression = valueArgument.valueArgument?.getArgumentExpression() ?: return@f false
+                    bundleNameExpression is JetSimpleNameExpression && bundleNameExpression.mainReference.resolve() == parent
+                }
+            }
+        }
+    }
+
+    return false
+}
+
+public object KotlinPropertyKeyReferenceProvider : PsiReferenceProvider() {
+    override fun getReferencesByElement(element: PsiElement, context: ProcessingContext): Array<out PsiReference> {
+        if (!(element is JetStringTemplateExpression && element.isPlain())) return PsiReference.EMPTY_ARRAY
+        val bundleName = element.getBundleNameByContext() ?: return PsiReference.EMPTY_ARRAY
+        return arrayOf(PropertyReference(ElementManipulators.getValueText(element), element, bundleName, false))
+    }
+}
+
+public object KotlinResourceBundleNameReferenceProvider : PsiReferenceProvider() {
+    override fun getReferencesByElement(element: PsiElement, context: ProcessingContext): Array<out PsiReference> {
+        if (!(element is JetStringTemplateExpression && element.isPlain() && element.isBundleName())) return PsiReference.EMPTY_ARRAY
+        return arrayOf(ResourceBundleReference(element))
+    }
+}

idea/testData/findUsages/kotlin/propertyFiles/propertyFileUsagesByRef.0.kt

@@ -0,0 +1,9 @@
+// PSI_ELEMENT: com.intellij.lang.properties.psi.PropertiesFile
+// FIND_BY_REF
+import org.jetbrains.annotations.PropertyKey
+
+public fun message(@PropertyKey(resourceBundle = "<caret>idea.testData.findUsages.kotlin.propertyFiles.propertyFileUsagesByRef.2") key: String) = key
+
+fun test() {
+    message("foo.bar")
+}

idea/testData/findUsages/kotlin/propertyFiles/propertyFileUsagesByRef.1.java

@@ -0,0 +1,11 @@
+import org.jetbrains.annotations.PropertyKey;
+
+class A {
+    static String message(@PropertyKey(resourceBundle = "idea.testData.findUsages.kotlin.propertyFiles.propertyFileUsagesByRef.2") String key, Object... args) {
+        return key;
+    }
+
+    void test() {
+        message("foo.bar");
+    }
+}

idea/testData/findUsages/kotlin/propertyFiles/propertyFileUsagesByRef.2.properties

@@ -0,0 +1 @@
+foo.bar = test

idea/testData/findUsages/kotlin/propertyFiles/propertyFileUsagesByRef.3.kt

@@ -0,0 +1,5 @@
+package org.jetbrains.annotations
+
+@Retention(AnnotationRetention.BINARY)
+@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.LOCAL_VARIABLE, AnnotationTarget.FIELD)
+public annotation class PropertyKey(public val resourceBundle: String)

idea/testData/findUsages/kotlin/propertyFiles/propertyFileUsagesByRef.results.txt

@@ -0,0 +1,2 @@
+[propertyFileUsagesByRef.0.kt] Usage in string constants (5: 51) public fun message(@PropertyKey(resourceBundle = "idea.testData.findUsages.kotlin.propertyFiles.propertyFileUsagesByRef.2") key: String) = key
+[propertyFileUsagesByRef.1.java] Method parameter declaration (4: 58) static String message(@PropertyKey(resourceBundle = "idea.testData.findUsages.kotlin.propertyFiles.propertyFileUsagesByRef.2") String key, Object... args) {

idea/testData/findUsages/kotlin/propertyFiles/propertyUsagesByRef.0.kt

@@ -0,0 +1,9 @@
+// PSI_ELEMENT: com.intellij.lang.properties.psi.Property
+// FIND_BY_REF
+import org.jetbrains.annotations.PropertyKey
+
+public fun message(@PropertyKey(resourceBundle = "idea.testData.findUsages.kotlin.propertyFiles.propertyUsagesByRef.2") key: String) = key
+
+fun test() {
+    message("<caret>foo.bar")
+}

idea/testData/findUsages/kotlin/propertyFiles/propertyUsagesByRef.1.java

@@ -0,0 +1,5 @@
+class A {
+    void test() {
+        PropertyUsages_1Kt.message("foo.bar");
+    }
+}

idea/testData/findUsages/kotlin/propertyFiles/propertyUsagesByRef.2.properties

@@ -0,0 +1 @@
+foo.bar = test

idea/testData/findUsages/kotlin/propertyFiles/propertyUsagesByRef.3.kt

@@ -0,0 +1,5 @@
+package org.jetbrains.annotations
+
+@Retention(AnnotationRetention.BINARY)
+@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.LOCAL_VARIABLE, AnnotationTarget.FIELD)
+public annotation class PropertyKey(public val resourceBundle: String)

idea/testData/findUsages/kotlin/propertyFiles/propertyUsagesByRef.results.txt

@@ -0,0 +1,2 @@
+[propertyUsagesByRef.0.kt] Usage in string constants (8: 14) message("foo.bar")
+[propertyUsagesByRef.1.java] Usage in string constants (3: 37) PropertyUsages_1Kt.message("foo.bar");

idea/testData/findUsages/propertyFiles/propertyFileUsages.0.properties

@@ -0,0 +1,2 @@
+## FIND_FILE_USAGES
+foo.bar = test

idea/testData/findUsages/propertyFiles/propertyFileUsages.1.kt

@@ -0,0 +1,10 @@
+import org.jetbrains.annotations.PropertyKey
+
+private val BUNDLE_NAME = "idea.testData.findUsages.propertyFiles.propertyFileUsages.0"
+
+public fun message(@PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyFileUsages.0") key: String) = key
+public fun message2(@PropertyKey(resourceBundle = BUNDLE_NAME) key: String) = key
+
+fun test() {
+    message("foo.bar")
+}

idea/testData/findUsages/propertyFiles/propertyFileUsages.2.kt

@@ -0,0 +1,5 @@
+package org.jetbrains.annotations
+
+@Retention(AnnotationRetention.BINARY)
+@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.LOCAL_VARIABLE, AnnotationTarget.FIELD)
+public annotation class PropertyKey(public val resourceBundle: String)

idea/testData/findUsages/propertyFiles/propertyFileUsages.results.txt

@@ -0,0 +1,2 @@
+Usage in string constants (3: 28) private val BUNDLE_NAME = "idea.testData.findUsages.propertyFiles.propertyFileUsages.0"
+Usage in string constants (5: 51) public fun message(@PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyFileUsages.0") key: String) = key

idea/testData/findUsages/propertyFiles/propertyUsages.0.properties

@@ -0,0 +1 @@
+foo<caret>.bar = test

idea/testData/findUsages/propertyFiles/propertyUsages.1.kt

@@ -0,0 +1,30 @@
+import org.jetbrains.annotations.PropertyKey
+
+public fun message(@PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") key: String) = key
+
+public fun String.infixMessage(@PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") key: String) = key
+
+public fun @receiver:PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") String.infixMessage2(s: String) = this
+
+public fun @receiver:PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") String.minus() = this
+
+public fun Int.get(@PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") key: String) = this
+
+public fun @receiver:PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") String.get(s: String) = this
+
+fun test() {
+    @PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") val s1 = "foo.bar"
+    @PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") val s2 = "foo.baz"
+    message("foo.bar")
+    message("foo.baz")
+
+    "test" infixMessage "foo.bar"
+    "foo.bar" infixMessage "test"
+    "foo.bar" infixMessage2 "test"
+    "test" infixMessage2 "foo.bar"
+    "foo.bar".infixMessage2("test")
+    -"foo.bar"
+    1["foo.bar"]
+    "foo.bar"["test"]
+    "test"["foo.bar"]
+}

idea/testData/findUsages/propertyFiles/propertyUsages.2.java

@@ -0,0 +1,8 @@
+class A {
+    void test() {
+        @PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") String s1 = "foo.bar"
+        @PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") String s2 = "foo.baz"
+        PropertyUsages_1Kt.message("foo.bar");
+        PropertyUsages_1Kt.message("foo.baz");
+    }
+}

idea/testData/findUsages/propertyFiles/propertyUsages.3.kt

@@ -0,0 +1,5 @@
+package org.jetbrains.annotations
+
+@Retention(AnnotationRetention.BINARY)
+@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.LOCAL_VARIABLE, AnnotationTarget.FIELD)
+public annotation class PropertyKey(public val resourceBundle: String)

idea/testData/findUsages/propertyFiles/propertyUsages.results.txt

@@ -0,0 +1,10 @@
+[propertyUsages.1.kt] Usage in string constants (16: 104) @PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") val s1 = "foo.bar"
+[propertyUsages.1.kt] Usage in string constants (18: 14) message("foo.bar")
+[propertyUsages.1.kt] Usage in string constants (21: 26) "test" infixMessage "foo.bar"
+[propertyUsages.1.kt] Usage in string constants (23: 6) "foo.bar" infixMessage2 "test"
+[propertyUsages.1.kt] Usage in string constants (25: 6) "foo.bar".infixMessage2("test")
+[propertyUsages.1.kt] Usage in string constants (26: 7) -"foo.bar"
+[propertyUsages.1.kt] Usage in string constants (27: 8) 1["foo.bar"]
+[propertyUsages.1.kt] Usage in string constants (28: 6) "foo.bar"["test"]
+[propertyUsages.2.java] Usage in string constants (3: 111) @PropertyKey(resourceBundle = "idea.testData.findUsages.propertyFiles.propertyUsages.0") String s1 = "foo.bar"
+[propertyUsages.2.java] Usage in string constants (5: 37) PropertyUsages_1Kt.message("foo.bar");

idea/tests/org/jetbrains/kotlin/findUsages/AbstractJetFindUsagesTest.java

@@ -22,11 +22,12 @@ import com.google.common.base.Predicates;
 import com.google.common.collect.Collections2;
 import com.google.common.collect.Ordering;
 import com.intellij.codeInsight.JavaTargetElementEvaluator;
-import com.intellij.codeInsight.TargetElementUtil;
 import com.intellij.codeInsight.TargetElementUtilBase;
 import com.intellij.find.FindManager;
 import com.intellij.find.findUsages.*;
 import com.intellij.find.impl.FindManagerImpl;
+import com.intellij.lang.properties.psi.PropertiesFile;
+import com.intellij.lang.properties.psi.Property;
 import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.io.FileUtil;
@@ -296,11 +297,21 @@ public abstract class AbstractJetFindUsagesTest extends JetLightCodeInsightFixtu
         String mainFileText = FileUtil.loadFile(mainFile, true);
         final String prefix = mainFileName.substring(0, mainFileName.indexOf('.') + 1);
 
-        List<String> caretElementClassNames = InTextDirectivesUtils.findLinesWithPrefixesRemoved(mainFileText, "// PSI_ELEMENT: ");
-        assert caretElementClassNames.size() == 1;
-        //noinspection unchecked
+        boolean isPropertiesFile = FileUtilRt.getExtension(path).equals("properties");
 
-        Class<T> caretElementClass = (Class<T>)Class.forName(caretElementClassNames.get(0));
+        Class<T> caretElementClass;
+        if (!isPropertiesFile) {
+            List<String> caretElementClassNames = InTextDirectivesUtils.findLinesWithPrefixesRemoved(mainFileText, "// PSI_ELEMENT: ");
+            assert caretElementClassNames.size() == 1;
+            //noinspection unchecked
+            caretElementClass = (Class<T>)Class.forName(caretElementClassNames.get(0));
+        }
+        else {
+            //noinspection unchecked
+            caretElementClass = (Class<T>) (InTextDirectivesUtils.isDirectiveDefined(mainFileText, "## FIND_FILE_USAGES")
+                                            ? PropertiesFile.class
+                                            : Property.class);
+        }
 
         OptionsParser parser = OptionsParser.getParserByPsiElementClass(caretElementClass);
 
@@ -317,6 +328,7 @@ public abstract class AbstractJetFindUsagesTest extends JetLightCodeInsightFixtu
                         return ext.equals("kt")
                                || ext.equals("java")
                                || ext.equals("xml")
+                               || ext.equals("properties")
                                || (ext.equals("txt") && !name.endsWith(".results.txt"));
                     }
                 }

idea/tests/org/jetbrains/kotlin/findUsages/JetFindUsagesTestGenerated.java

@@ -1036,6 +1036,27 @@ public class JetFindUsagesTestGenerated extends AbstractJetFindUsagesTest {
             }
         }
 
+        @TestMetadata("idea/testData/findUsages/kotlin/propertyFiles")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class PropertyFiles extends AbstractJetFindUsagesTest {
+            public void testAllFilesPresentInPropertyFiles() throws Exception {
+                JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/findUsages/kotlin/propertyFiles"), Pattern.compile("^(.+)\\.0\\.kt$"), true);
+            }
+
+            @TestMetadata("propertyFileUsagesByRef.0.kt")
+            public void testPropertyFileUsagesByRef() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("idea/testData/findUsages/kotlin/propertyFiles/propertyFileUsagesByRef.0.kt");
+                doTest(fileName);
+            }
+
+            @TestMetadata("propertyUsagesByRef.0.kt")
+            public void testPropertyUsagesByRef() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("idea/testData/findUsages/kotlin/propertyFiles/propertyUsagesByRef.0.kt");
+                doTest(fileName);
+            }
+        }
+
         @TestMetadata("idea/testData/findUsages/kotlin/unresolvedAnnotation")
         @TestDataPath("$PROJECT_ROOT")
         @RunWith(JUnit3RunnerWithInners.class)
@@ -1315,4 +1336,25 @@ public class JetFindUsagesTestGenerated extends AbstractJetFindUsagesTest {
             }
         }
     }
+
+    @TestMetadata("idea/testData/findUsages/propertyFiles")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class PropertyFiles extends AbstractJetFindUsagesTest {
+        public void testAllFilesPresentInPropertyFiles() throws Exception {
+            JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/findUsages/propertyFiles"), Pattern.compile("^(.+)\\.0\\.properties$"), true);
+        }
+
+        @TestMetadata("propertyFileUsages.0.properties")
+        public void testPropertyFileUsages() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/findUsages/propertyFiles/propertyFileUsages.0.properties");
+            doTest(fileName);
+        }
+
+        @TestMetadata("propertyUsages.0.properties")
+        public void testPropertyUsages() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/findUsages/propertyFiles/propertyUsages.0.properties");
+            doTest(fileName);
+        }
+    }
 }