Implement smart enter processors for try, catch (parameters and body) and finally with tests

Fixes #KT-10013

idea/src/org/jetbrains/kotlin/idea/editor/KotlinSmartEnterHandler.kt

@@ -49,7 +49,12 @@ class KotlinSmartEnterHandler: SmartEnterProcessorWithFixers() {
                 KotlinFunctionDeclarationBodyFixer(),
 
                 KotlinPropertySetterParametersFixer(),
-                KotlinPropertySetterBodyFixer()
+                KotlinPropertySetterBodyFixer(),
+
+                KotlinTryBodyFixer(),
+                KotlinCatchParameterFixer(),
+                KotlinCatchBodyFixer(),
+                KotlinFinallyBodyFixer()
         )
 
         addEnterProcessors(KotlinPlainEnterProcessor())

idea/src/org/jetbrains/kotlin/idea/editor/fixers/KotlinCatchBodyFixer.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010-2016 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.editor.fixers
+
+import com.intellij.lang.SmartEnterProcessorWithFixers
+import com.intellij.openapi.editor.Editor
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.idea.editor.KotlinSmartEnterHandler
+import org.jetbrains.kotlin.psi.KtCatchClause
+import org.jetbrains.kotlin.psi.psiUtil.endOffset
+
+class KotlinCatchBodyFixer : SmartEnterProcessorWithFixers.Fixer<KotlinSmartEnterHandler>() {
+    override fun apply(editor: Editor, processor: KotlinSmartEnterHandler, psiElement: PsiElement) {
+        if (psiElement !is KtCatchClause) return
+
+        if (psiElement.catchBody == null) {
+            editor.document.insertString(psiElement.endOffset, "{}")
+        }
+    }
+}

idea/src/org/jetbrains/kotlin/idea/editor/fixers/KotlinCatchParameterFixer.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2016 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.editor.fixers
+
+import com.intellij.lang.SmartEnterProcessorWithFixers
+import com.intellij.openapi.editor.Editor
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.idea.editor.KotlinSmartEnterHandler
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.psi.KtCatchClause
+import org.jetbrains.kotlin.psi.psiUtil.endOffset
+import org.jetbrains.kotlin.psi.psiUtil.startOffset
+
+class KotlinCatchParameterFixer : SmartEnterProcessorWithFixers.Fixer<KotlinSmartEnterHandler>() {
+    override fun apply(editor: Editor, processor: KotlinSmartEnterHandler, psiElement: PsiElement) {
+        if (psiElement !is KtCatchClause) return
+
+        val catchEnd = psiElement.node.findChildByType(KtTokens.CATCH_KEYWORD)!!.textRange!!.endOffset
+
+        val parameterList = psiElement.parameterList
+        if (parameterList == null || parameterList.node.findChildByType(KtTokens.RPAR) == null) {
+            val endOffset = Math.min(psiElement.endOffset, psiElement.catchBody?.startOffset ?: Int.MAX_VALUE)
+            val parameter = parameterList?.parameters?.firstOrNull()?.text ?: ""
+            editor.document.replaceString(catchEnd, endOffset, "($parameter)")
+            processor.registerUnresolvedError(endOffset - 1)
+        }
+        else if (parameterList.parameters.firstOrNull()?.text.isNullOrBlank()) {
+            processor.registerUnresolvedError(parameterList.startOffset + 1)
+        }
+    }
+}

idea/src/org/jetbrains/kotlin/idea/editor/fixers/KotlinFinallyBodyFixer.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010-2016 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.editor.fixers
+
+import com.intellij.lang.SmartEnterProcessorWithFixers
+import com.intellij.openapi.editor.Editor
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.idea.editor.KotlinSmartEnterHandler
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.psi.KtFinallySection
+
+class KotlinFinallyBodyFixer : SmartEnterProcessorWithFixers.Fixer<KotlinSmartEnterHandler>() {
+    override fun apply(editor: Editor, processor: KotlinSmartEnterHandler, psiElement: PsiElement) {
+        if (psiElement !is KtFinallySection) return
+
+        if (!psiElement.finalExpression.text.startsWith('{')) {
+            editor.document.insertString(psiElement.node.findChildByType(KtTokens.FINALLY_KEYWORD)!!.textRange.end, "{}")
+        }
+    }
+}

idea/src/org/jetbrains/kotlin/idea/editor/fixers/KotlinTryBodyFixer.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2010-2016 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.editor.fixers
+
+import com.intellij.lang.SmartEnterProcessorWithFixers
+import com.intellij.openapi.editor.Editor
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.idea.editor.KotlinSmartEnterHandler
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.psi.KtTryExpression
+
+class KotlinTryBodyFixer : SmartEnterProcessorWithFixers.Fixer<KotlinSmartEnterHandler>() {
+    override fun apply(editor: Editor, processor: KotlinSmartEnterHandler, psiElement: PsiElement) {
+        if (psiElement !is KtTryExpression) return
+
+        if (psiElement.tryBlock.lBrace == null) {
+            val offset = psiElement.node.findChildByType(KtTokens.TRY_KEYWORD)?.textRange?.endOffset ?: return
+            editor.document.insertString(offset, "{}")
+        }
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/codeInsight/smartEnter/SmartEnterTest.kt

@@ -1185,12 +1185,106 @@ class SmartEnterTest : KotlinLightCodeInsightFixtureTestCase() {
             """
     )
 
+    fun testTryBody() = doFunTest(
+            """
+            try<caret>
+            """
+            ,
+            """
+            try {
+                <caret>
+            }
+            """
+    )
+
+    fun testCatchBody() = doFunTest(
+            """
+            try {
+            } catch(e: Exception) <caret>
+            """
+            ,
+            """
+            try {
+            } catch(e: Exception) {
+                <caret>
+            }${" "}
+            """
+    )
+
+    fun testCatchParameter1() = doFunTest(
+            """
+            try {
+            } catch<caret>
+            """
+            ,
+            """
+            try {
+            } catch(<caret>) {
+            }
+            """
+    )
+
+    fun testCatchParameter2() = doFunTest(
+            """
+            try {
+            } catch(<caret>
+            """
+            ,
+            """
+            try {
+            } catch(<caret>) {
+            }
+            """
+    )
+
+    fun testCatchParameter3() = doFunTest(
+            """
+            try {
+            } catch(<caret> {}
+            """
+            ,
+            """
+            try {
+            } catch(<caret>) {
+            }
+            """
+    )
+
+    fun testCatchParameter4() = doFunTest(
+            """
+            try {
+            } catch(e: Exception<caret>
+            """
+            ,
+            """
+            try {
+            } catch(e: Exception) {
+                <caret>
+            }
+            """
+    )
+    fun testFinallyBody() = doFunTest(
+            """
+            try {
+            } catch(e: Exception) {
+            } finally<caret>
+            """
+            ,
+            """
+            try {
+            } catch(e: Exception) {
+            } finally {
+                <caret>
+            }
+            """
+    )
+
     fun doFunTest(before: String, after: String) {
         fun String.withFunContext(): String {
             val bodyText = "//----\n${this.trimIndent()}\n//----"
             val withIndent = bodyText.prependIndent("    ")
 
-            return "fun method() {\n${withIndent}\n}"
+            return "fun method() {\n$withIndent\n}"
         }
 
         doTest(before.withFunContext(), after.withFunContext())