KT-11957 No "catch" and "finally" keywords in completion

#KT-11957 Fixed

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/KeywordCompletion.kt

@@ -64,9 +64,8 @@ object KeywordCompletion {
             WHILE_KEYWORD to "fun foo() { while(caret)",
             FOR_KEYWORD to "fun foo() { for(caret)",
             TRY_KEYWORD to "fun foo() { try {\ncaret\n}",
-/* TODO!
-            CATCH_KEYWORD to "fun foo() { try {} catch (<caret>)",
-*/
+            CATCH_KEYWORD to "fun foo() { try {} catch (caret)",
+            FINALLY_KEYWORD to "fun foo() { try {\n}\nfinally{\ncaret\n}",
             DO_KEYWORD to "fun foo() { do {\ncaret\n}",
             INIT_KEYWORD to "class C { init {\ncaret\n}",
             CONSTRUCTOR_KEYWORD to "class C { constructor(caret)"
@@ -187,8 +186,15 @@ object KeywordCompletion {
         while (parent != null) {
             when (parent) {
                 is KtBlockExpression -> {
-                    val prefixText = "fun foo() { "
+                    var prefixText = "fun foo() { "
                     if (prevParent is KtExpression) {
+                        val tryExpression = prevParent.prevSiblingOfSameType() as? KtTryExpression
+                        if (tryExpression != null && tryExpression.finallyBlock == null) {
+                            prefixText += when {
+                                tryExpression.catchClauses.isEmpty() -> "try {}\n"
+                                else -> "try {} catch (e: E) {}\n"
+                            }
+                        }
                         return buildFilterWithContext(prefixText, prevParent, position)
                     }
                     else {

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/handlers/handlerUtils.kt

@@ -100,10 +100,8 @@ fun createKeywordConstructLookupElement(
     }
 
     val indent = detectIndent(newFileText, keywordOffset)
-    if (indent != null) {
-        tailBeforeCaret = tailBeforeCaret.unindent(indent)
-        tailAfterCaret = tailAfterCaret.unindent(indent)
-    }
+    tailBeforeCaret = tailBeforeCaret.unindent(indent)
+    tailAfterCaret = tailAfterCaret.unindent(indent)
 
     var lookupElementBuilder = LookupElementBuilder.create(KeywordLookupObject(), keyword)
             .bold()
@@ -111,12 +109,10 @@ fun createKeywordConstructLookupElement(
                 if (insertionContext.completionChar == Lookup.NORMAL_SELECT_CHAR || insertionContext.completionChar == Lookup.REPLACE_SELECT_CHAR) {
                     val offset = insertionContext.tailOffset
                     val newIndent = detectIndent(insertionContext.document.charsSequence, offset - keyword.length)
-                    var beforeCaret = tailBeforeCaret
-                    var afterCaret = tailAfterCaret
-                    if (newIndent != null) {
-                        beforeCaret = beforeCaret.indentLinesAfterFirst(newIndent)
-                        afterCaret = afterCaret.indentLinesAfterFirst(newIndent)
-                    }
+
+                    val beforeCaret = tailBeforeCaret.indentLinesAfterFirst(newIndent)
+                    val afterCaret = tailAfterCaret.indentLinesAfterFirst(newIndent)
+
                     insertionContext.document.insertString(offset, beforeCaret + afterCaret)
                     insertionContext.editor.moveCaret(offset + beforeCaret.length)
                 }
@@ -127,19 +123,24 @@ fun createKeywordConstructLookupElement(
     return lookupElementBuilder
 }
 
-private fun detectIndent(text: CharSequence, offset: Int): String? {
+private fun detectIndent(text: CharSequence, offset: Int): String {
     val reversedIndent = buildString {
         var index = offset - 1
-        Loop@
         while (index >= 0) {
             val c = text[index]
-            when (c) {
-                ' ', '\t' -> append(c)
-                '\r', '\n' -> break@Loop
-                else -> return null
+            if (c == '\n' || c == '\r') {
+                break
             }
             index--
         }
+        index++
+
+        while (index < offset) {
+            val c = text[index]
+            if (!c.isWhitespace()) break
+            append(c)
+            index++
+        }
     }
     return reversedIndent.reversed()
 }

idea/idea-completion/testData/handlers/keywords/Finally.kt

@@ -0,0 +1,10 @@
+fun t() {
+    while (true) {
+        try {
+
+        }
+        f<caret>
+    }
+}
+
+// ELEMENT: finally

idea/idea-completion/testData/handlers/keywords/Finally.kt.after

@@ -0,0 +1,12 @@
+fun t() {
+    while (true) {
+        try {
+
+        }
+        finally {
+            <caret>
+        }
+    }
+}
+
+// ELEMENT: finally

idea/idea-completion/testData/keywords/AfterTry.kt

@@ -0,0 +1,13 @@
+fun foo() {
+    try {
+
+    }
+    <caret>
+}
+
+// EXIST: catch
+// EXIST: finally
+// EXIST: false
+// EXIST: null
+// EXIST: true
+// NOTHING_ELSE

idea/idea-completion/testData/keywords/AfterTryCatch.kt

@@ -0,0 +1,32 @@
+fun foo() {
+    try {
+
+    }
+    catch(e: Exception) {
+
+    }
+    <caret>
+}
+
+// EXIST: catch
+// EXIST: finally
+// EXIST: class
+// EXIST: do
+// EXIST: false
+// EXIST: for
+// EXIST: fun
+// EXIST: if
+// EXIST: null
+// EXIST: object
+// EXIST: return
+// EXIST: super
+// EXIST: throw
+// EXIST: interface
+// EXIST: true
+// EXIST: try
+// EXIST: val
+// EXIST: var
+// EXIST: when
+// EXIST: while
+// EXIST: as
+// NOTHING_ELSE

idea/idea-completion/testData/keywords/AfterTryFinally.kt

@@ -0,0 +1,29 @@
+fun foo() {
+    try {
+
+    }
+    finally {
+
+    }
+    <caret>
+}
+
+// EXIST: class
+// EXIST: do
+// EXIST: false
+// EXIST: for
+// EXIST: fun
+// EXIST: if
+// EXIST: null
+// EXIST: object
+// EXIST: return
+// EXIST: super
+// EXIST: throw
+// EXIST: interface
+// EXIST: true
+// EXIST: try
+// EXIST: val
+// EXIST: var
+// EXIST: when
+// EXIST: while
+// NOTHING_ELSE

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/KeywordCompletionTestGenerated.java

@@ -67,6 +67,24 @@ public class KeywordCompletionTestGenerated extends AbstractKeywordCompletionTes
         doTest(fileName);
     }
 
+    @TestMetadata("AfterTry.kt")
+    public void testAfterTry() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/keywords/AfterTry.kt");
+        doTest(fileName);
+    }
+
+    @TestMetadata("AfterTryCatch.kt")
+    public void testAfterTryCatch() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/keywords/AfterTryCatch.kt");
+        doTest(fileName);
+    }
+
+    @TestMetadata("AfterTryFinally.kt")
+    public void testAfterTryFinally() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/keywords/AfterTryFinally.kt");
+        doTest(fileName);
+    }
+
     public void testAllFilesPresentInKeywords() throws Exception {
         KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/idea-completion/testData/keywords"), Pattern.compile("^(.+)\\.kt$"), false);
     }

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/handlers/KeywordCompletionHandlerTestGenerated.java

@@ -47,6 +47,12 @@ public class KeywordCompletionHandlerTestGenerated extends AbstractKeywordComple
         doTest(fileName);
     }
 
+    @TestMetadata("Catch.kt")
+    public void testCatch() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/keywords/Catch.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("CompanionObject.kt")
     public void testCompanionObject() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/keywords/CompanionObject.kt");
@@ -71,6 +77,12 @@ public class KeywordCompletionHandlerTestGenerated extends AbstractKeywordComple
         doTest(fileName);
     }
 
+    @TestMetadata("Finally.kt")
+    public void testFinally() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/keywords/Finally.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("For.kt")
     public void testFor() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/keywords/For.kt");