Try to avoid loading ast for decompiled files (KT-14804)

#KT-14804 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/findDecompiledDeclaration.kt

@@ -31,6 +31,7 @@ import org.jetbrains.kotlin.load.kotlin.JvmBuiltInsSettings
 import org.jetbrains.kotlin.psi.KtCallableDeclaration
 import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtDeclaration
+import org.jetbrains.kotlin.psi.KtDeclarationContainer
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.renderer.DescriptorRendererModifier
 import org.jetbrains.kotlin.resolve.DescriptorUtils
@@ -147,6 +148,24 @@ object ByDescriptorIndexer : DecompiledTextIndexer<String> {
             return classOrObject?.getPrimaryConstructor() ?: classOrObject
         }
 
+        if (!file.isContentsLoaded) {
+            if (original is MemberDescriptor) {
+                val declarationContainer: KtDeclarationContainer? = when {
+                    DescriptorUtils.isTopLevelDeclaration(original) -> file
+                    original.containingDeclaration is ClassDescriptor ->
+                        getDeclarationForDescriptor(original.containingDeclaration as ClassDescriptor, file) as? KtClassOrObject
+                    else -> null
+                }
+
+                if (declarationContainer != null) {
+                    val descriptorName = original.name.asString()
+                    val singleOrNull = declarationContainer.declarations.singleOrNull { it.name == descriptorName }
+                    if (singleOrNull != null) {
+                        return singleOrNull
+                    }
+                }
+            }
+        }
 
         return file.getDeclaration(this, original.toStringKey()) ?: run {
             if (descriptor !is ClassDescriptor) return null

idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/AstAccessControl.kt

@@ -23,6 +23,7 @@ import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.openapi.vfs.VirtualFileFilter
 import com.intellij.psi.PsiManager
 import com.intellij.psi.impl.PsiManagerImpl
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.test.InTextDirectivesUtils
 import kotlin.test.fail
@@ -48,15 +49,16 @@ object AstAccessControl {
             shouldFail: Boolean, allowedFiles: List<VirtualFile>,
             project: Project, disposable: Disposable, testBody: () -> Unit
     ) {
-        setFilter(allowedFiles, disposable, project)
-        performTest(shouldFail, testBody)
+        val filter = wrapWithDirectiveAllow { file ->
+            file.fileType != KotlinFileType.INSTANCE || file in allowedFiles
+        }
+
+        execute(shouldFail, project, disposable, filter, testBody)
     }
 
-    private fun setFilter(allowedFiles: List<VirtualFile>, disposable: Disposable, project: Project) {
-        val manager = (PsiManager.getInstance(project) as PsiManagerImpl)
-        val filter = VirtualFileFilter {
-            file ->
-            if (file!!.fileType != KotlinFileType.INSTANCE || file in allowedFiles) {
+    fun wrapWithDirectiveAllow(allowedFiles: (VirtualFile) -> Boolean): (VirtualFile) -> Boolean {
+        return { file ->
+            if (allowedFiles(file)) {
                 false
             }
             else {
@@ -64,23 +66,38 @@ object AstAccessControl {
                 !InTextDirectivesUtils.isDirectiveDefined(text, ALLOW_AST_ACCESS_DIRECTIVE)
             }
         }
-        manager.setAssertOnFileLoadingFilter(filter, disposable)
     }
 
-    private fun performTest(shouldFail: Boolean, testBody: () -> Unit) {
+    fun <T : Any> execute(shouldFail: Boolean, disposable: Disposable, fixture: CodeInsightTestFixture, testBody: () -> T): T? {
+        return execute(shouldFail, fixture.project, disposable, { file -> file != fixture.file.virtualFile }, testBody)
+    }
+
+    private fun <T : Any> execute(shouldFail: Boolean, project: Project, disposable: Disposable,
+                                  forbidAstAccessFilter: (VirtualFile) -> Boolean, testBody: () -> T): T? {
+        val manager = (PsiManager.getInstance(project) as PsiManagerImpl)
+
+        manager.setAssertOnFileLoadingFilter(VirtualFileFilter { file -> forbidAstAccessFilter(file) }, disposable)
+
         try {
-            testBody()
+            val result = testBody()
             if (shouldFail) {
                 fail("This failure means that that a test that should fail (by triggering ast switch) in fact did not.\n" +
-                                 "This could happen for the following reasons:\n" +
-                                 "1. This kind of operation no longer trigger ast switch, choose better indicator test case." +
-                                 "2. Test is now misconfigured and no longer checks for ast switch, reconfigure the test.")
+                     "This could happen for the following reasons:\n" +
+                     "1. This kind of operation no longer trigger ast switch, choose better indicator test case." +
+                     "2. Test is now misconfigured and no longer checks for ast switch, reconfigure the test.")
             }
+
+            return result
         }
         catch (e: Throwable) {
             if (!shouldFail) {
                 throw e
             }
         }
+        finally {
+            manager.setAssertOnFileLoadingFilter(VirtualFileFilter.NONE, disposable)
+        }
+
+        return null
     }
 }

idea/testData/resolve/referenceWithLib/overloadFun.kt

@@ -0,0 +1,10 @@
+package test
+
+import dependency.*
+
+fun foo() {
+    t<caret>est("")
+}
+
+// ALLOW_AST_ACCESS
+// REF: (dependency).test(kotlin.String)

idea/testData/resolve/referenceWithLib/overloadFunSrc/lib.kt

@@ -0,0 +1,7 @@
+package dependency
+
+fun test(a: Int) {
+}
+
+fun test(a: String) {
+}

idea/tests/org/jetbrains/kotlin/idea/resolve/AbstractReferenceResolveTest.kt

@@ -58,7 +58,7 @@ abstract class AbstractReferenceResolveTest : KotlinLightPlatformCodeInsightFixt
     protected fun doSingleResolveTest() {
         forEachCaret { index, offset ->
             val expectedResolveData = readResolveData(myFixture.file.text, index, refMarkerText)
-            val psiReference = myFixture.file.findReferenceAt(offset)
+            val psiReference = wrapReference(myFixture.file.findReferenceAt(offset))
             checkReferenceResolve(expectedResolveData, offset, psiReference) { checkResolvedTo(it) }
         }
     }
@@ -67,6 +67,9 @@ abstract class AbstractReferenceResolveTest : KotlinLightPlatformCodeInsightFixt
         // do nothing
     }
 
+    open fun wrapReference(reference: PsiReference?): PsiReference? = reference
+    open fun wrapReference(reference: PsiPolyVariantReference): PsiPolyVariantReference = reference
+
     protected fun doMultiResolveTest() {
         forEachCaret { index, offset ->
             val expectedReferences = getExpectedReferences(myFixture.file.text, index, refMarkerText)
@@ -75,7 +78,7 @@ abstract class AbstractReferenceResolveTest : KotlinLightPlatformCodeInsightFixt
             assertTrue(psiReference is PsiPolyVariantReference)
             psiReference as PsiPolyVariantReference
 
-            val results = psiReference.multiResolve(true)
+            val results = wrapReference(psiReference).multiResolve(true)
 
             val actualResolvedTo = Lists.newArrayList<String>()
             for (result in results) {
@@ -140,7 +143,7 @@ abstract class AbstractReferenceResolveTest : KotlinLightPlatformCodeInsightFixt
                 }
                 else {
                     if (!expectedResolveData.shouldBeUnresolved()) {
-                        assertNull("Element $psiReference wasn't resolved to anything, but $expectedString was expected", expectedString)
+                        assertNull("Element $psiReference (${psiReference.element.text}) wasn't resolved to anything, but $expectedString was expected", expectedString)
                     }
                 }
             }

idea/tests/org/jetbrains/kotlin/idea/resolve/AbstractReferenceResolveWithLibTest.java

@@ -16,9 +16,16 @@
 
 package org.jetbrains.kotlin.idea.resolve;
 
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiReference;
+import com.intellij.psi.impl.source.resolve.reference.impl.PsiDelegateReference;
 import com.intellij.testFramework.LightProjectDescriptor;
+import kotlin.jvm.functions.Function0;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.kotlin.idea.test.AstAccessControl;
 import org.jetbrains.kotlin.idea.test.JdkAndMockLibraryProjectDescriptor;
 import org.jetbrains.kotlin.idea.test.PluginTestCaseBase;
+import org.jetbrains.kotlin.test.InTextDirectivesUtils;
 
 public abstract class AbstractReferenceResolveWithLibTest extends AbstractReferenceResolveTest {
     private static final String TEST_DATA_PATH = PluginTestCaseBase.getTestDataPathBase() + "/resolve/referenceWithLib";
@@ -30,4 +37,32 @@ public abstract class AbstractReferenceResolveWithLibTest extends AbstractRefere
         }
         return new JdkAndMockLibraryProjectDescriptor(TEST_DATA_PATH + "/" + getTestName(true) + "Src", false, true, false, false);
     }
+
+    @Nullable
+    @Override
+    public PsiReference wrapReference(@Nullable final PsiReference reference) {
+        if (reference == null) return null;
+
+        if (InTextDirectivesUtils.isDirectiveDefined(myFixture.getFile().getText(), AstAccessControl.INSTANCE.getALLOW_AST_ACCESS_DIRECTIVE())) {
+            return reference;
+        }
+
+        return new PsiDelegateReference(reference) {
+            @Nullable
+            @Override
+            public PsiElement resolve() {
+                return AstAccessControl.INSTANCE.execute(false, myTestRootDisposable, myFixture, new Function0<PsiElement>() {
+                    @Override
+                    public PsiElement invoke() {
+                        return reference.resolve();
+                    }
+                });
+            }
+
+            @Override
+            public String toString() {
+                return reference.toString();
+            }
+        };
+    }
 }

idea/tests/org/jetbrains/kotlin/idea/resolve/ReferenceResolveWithLibTestGenerated.java

@@ -78,6 +78,12 @@ public class ReferenceResolveWithLibTestGenerated extends AbstractReferenceResol
         doTest(fileName);
     }
 
+    @TestMetadata("overloadFun.kt")
+    public void testOverloadFun() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/resolve/referenceWithLib/overloadFun.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("overridingFunctionWithSamAdapter.kt")
     public void testOverridingFunctionWithSamAdapter() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/resolve/referenceWithLib/overridingFunctionWithSamAdapter.kt");