KT-15553 Support compile constant for "Copy concatenation text to clipboard"

#KT-15553 Fixed

idea/src/org/jetbrains/kotlin/idea/intentions/copyConcatenatedStringToClipboard/ConcatenatedStringGenerator.kt

@@ -16,8 +16,11 @@
 
 package org.jetbrains.kotlin.idea.intentions.copyConcatenatedStringToClipboard
 
+import org.jetbrains.kotlin.descriptors.PropertyDescriptor
+import org.jetbrains.kotlin.idea.caches.resolve.analyzeFully
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.collectDescendantsOfType
+import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
 
 class ConcatenatedStringGenerator {
     fun create(element: KtBinaryExpression): String {
@@ -37,7 +40,7 @@ class ConcatenatedStringGenerator {
             is KtBinaryExpression -> this.appendTo(sb)
             is KtConstantExpression -> sb.append(text)
             is KtStringTemplateExpression -> this.appendTo(sb)
-            else -> sb.append("?")
+            else -> sb.append(convertToValueIfCompileTimeConstant() ?: "?")
         }
     }
 
@@ -47,8 +50,15 @@ class ConcatenatedStringGenerator {
             when (stringTemplate) {
                 is KtLiteralStringTemplateEntry -> sb.append(stringTemplate.text)
                 is KtEscapeStringTemplateEntry -> sb.append(stringTemplate.unescapedValue)
-                else -> sb.append("?")
+                else -> sb.append(stringTemplate.expression?.convertToValueIfCompileTimeConstant() ?: "?")
             }
         }
     }
+
+    private fun KtExpression.convertToValueIfCompileTimeConstant(): String? {
+        val resolvedCall = getResolvedCall(analyzeFully()) ?: return null
+        val propertyDescriptor = resolvedCall.resultingDescriptor as? PropertyDescriptor ?: return null
+        return propertyDescriptor.compileTimeInitializer?.value?.toString()
+    }
+
 }

idea/testData/concatenatedStringGenerator/constants.kt

@@ -1 +1 @@
-"" + 1 + 1.1 + "foo"
+val test = "" + 1 + 1.1 + "foo"

idea/testData/concatenatedStringGenerator/constants2.kt

@@ -0,0 +1,2 @@
+val b = 1
+val test = "" + b + "foo"

idea/testData/concatenatedStringGenerator/constants2.kt.result

@@ -0,0 +1 @@
+1foo

idea/testData/concatenatedStringGenerator/simple.kt

@@ -1 +1 @@
-"foo" + "bar"
+val test = "foo" + "bar"

idea/testData/concatenatedStringGenerator/stringtemplate.kt

@@ -1 +1,7 @@
-"foo$foo$bar" + "${bar}${bar2()}bar"
+// WITH_RUNTIME
+
+var foo = "aaa"
+var bar = "bbb"
+fun bar2() = "will be ignored"
+
+val test = "foo$foo$bar" + "${bar}${bar2()}bar"

idea/testData/concatenatedStringGenerator/stringtemplateWithConstant.kt

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+
+val foo = "aaa"
+val bar = "bbb"
+fun bar2() = "will be ignored"
+
+val test = "foo$foo$bar" + "${bar}${bar2()}bar"

idea/testData/concatenatedStringGenerator/stringtemplateWithConstant.kt.result

@@ -0,0 +1 @@
+fooaaabbbbbb?bar

idea/testData/concatenatedStringGenerator/variables.kt

@@ -1 +1,2 @@
-"" + b<caret> + "foo"
+var b = 1
+val test = "" + b + "foo"

idea/tests/org/jetbrains/kotlin/idea/intentions/AbstractConcatenatedStringGeneratorTest.kt

@@ -16,24 +16,52 @@
 
 package org.jetbrains.kotlin.idea.intentions
 
+import com.intellij.openapi.fileEditor.FileDocumentManager
+import com.intellij.openapi.vfs.LocalFileSystem
+import com.intellij.psi.PsiDocumentManager
+import com.intellij.testFramework.PlatformTestUtil
 import junit.framework.TestCase
 import org.jetbrains.kotlin.idea.intentions.copyConcatenatedStringToClipboard.ConcatenatedStringGenerator
+import org.jetbrains.kotlin.idea.test.ConfigLibraryUtil
 import org.jetbrains.kotlin.idea.test.KotlinCodeInsightTestCase
+import org.jetbrains.kotlin.idea.test.PluginTestCaseBase
 import org.jetbrains.kotlin.psi.KtBinaryExpression
 import org.jetbrains.kotlin.psi.KtPsiFactory
+import org.jetbrains.kotlin.psi.psiUtil.collectDescendantsOfType
+import org.jetbrains.kotlin.test.InTextDirectivesUtils
 import java.io.File
 
+/**
+ * Compare xxx.kt.result file with the result of ConcatenatedStringGenerator().create(KtBinaryExpression) where KtBinaryExpression is the last KtBinaryExpression of xxx.kt file
+ */
 abstract class AbstractConcatenatedStringGeneratorTest : KotlinCodeInsightTestCase() {
 
     @Throws(Exception::class)
     protected fun doTest(path: String) {
         val mainFile = File(path)
-        val readText = mainFile.readText()
+        val fileText = mainFile.readText()
         val resultFile = File("$path.result")
         val expectedText = resultFile.readText()
-        val expression = KtPsiFactory(project).createExpression(readText) as? KtBinaryExpression
-        TestCase.assertNotNull("Invalid expression: $readText", expression)
-        val generatedString = ConcatenatedStringGenerator().create(expression!!)
-        TestCase.assertEquals("mismatch '$expectedText' - '$generatedString'", expectedText, generatedString)
+
+        val vFile = LocalFileSystem.getInstance().findFileByPath(path) ?: return
+        val document = FileDocumentManager.getInstance().getDocument(vFile) ?: return
+        val psiFile = PsiDocumentManager.getInstance(project).getPsiFile(document) ?: return
+
+        val isWithRuntime = InTextDirectivesUtils.findStringWithPrefixes(fileText, "// WITH_RUNTIME") != null
+
+        try {
+            if (isWithRuntime) ConfigLibraryUtil.configureKotlinRuntimeAndSdk(module, PluginTestCaseBase.mockJdk())
+            ConfigLibraryUtil.configureLibrariesByDirective(module, PlatformTestUtil.getCommunityPath(), fileText)
+
+            val ktFile = KtPsiFactory(project).createAnalyzableFile("dummy.kt", fileText, psiFile)
+            val expression = ktFile.collectDescendantsOfType<KtBinaryExpression>().lastOrNull()
+            TestCase.assertNotNull("No binary expression found: $path", expression)
+            val generatedString = ConcatenatedStringGenerator().create(expression!!)
+            TestCase.assertEquals("mismatch '$expectedText' - '$generatedString'", expectedText, generatedString)
+        }
+        finally {
+            ConfigLibraryUtil.unconfigureLibrariesByDirective(myModule, fileText)
+            if (isWithRuntime) ConfigLibraryUtil.unConfigureKotlinRuntimeAndSdk(module, testProjectJdk)
+        }
     }
 }

idea/tests/org/jetbrains/kotlin/idea/intentions/ConcatenatedStringGeneratorTestGenerated.java

@@ -42,6 +42,12 @@ public class ConcatenatedStringGeneratorTestGenerated extends AbstractConcatenat
         doTest(fileName);
     }
 
+    @TestMetadata("constants2.kt")
+    public void testConstants2() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/concatenatedStringGenerator/constants2.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("simple.kt")
     public void testSimple() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/concatenatedStringGenerator/simple.kt");
@@ -54,6 +60,12 @@ public class ConcatenatedStringGeneratorTestGenerated extends AbstractConcatenat
         doTest(fileName);
     }
 
+    @TestMetadata("stringtemplateWithConstant.kt")
+    public void testStringtemplateWithConstant() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/concatenatedStringGenerator/stringtemplateWithConstant.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("variables.kt")
     public void testVariables() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/concatenatedStringGenerator/variables.kt");