Completion for "file" keyword in annotations

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

@@ -45,7 +45,10 @@ object KeywordCompletion {
             .filter { it !in NON_ACTUAL_KEYWORDS }
             .map { it as JetKeywordToken }
 
-    private val KEYWORD_TO_DUMMY_POSTFIX = mapOf(OUT_KEYWORD to " X")
+    private val KEYWORD_TO_DUMMY_POSTFIX = mapOf(
+            OUT_KEYWORD to " X",
+            FILE_KEYWORD to ":"
+    )
 
     public fun complete(position: PsiElement, prefix: String, consumer: (LookupElement) -> Unit) {
         if (!GENERAL_FILTER.isAcceptable(position, position)) return

idea/src/org/jetbrains/kotlin/idea/completion/handlers/KotlinKeywordInsertHandler.kt

@@ -42,7 +42,11 @@ public object KotlinKeywordInsertHandler : InsertHandler<LookupElement> {
                                         DYNAMIC_KEYWORD).map { it.getValue() }
 
     override fun handleInsert(context: InsertionContext, item: LookupElement) {
-        if (item.getLookupString() !in NO_SPACE_AFTER) {
+        val keyword = item.getLookupString()
+        if (keyword == FILE_KEYWORD.getValue()) {
+            WithTailInsertHandler.colonTail().postHandleInsert(context, item)
+        }
+        else if (keyword !in NO_SPACE_AFTER) {
             WithTailInsertHandler.spaceTail().postHandleInsert(context, item)
         }
     }

idea/src/org/jetbrains/kotlin/idea/completion/handlers/WithTailInsertHandler.kt

@@ -91,5 +91,6 @@ class WithTailInsertHandler(val tailText: String,
         fun elseTail() = WithTailInsertHandler("else", spaceBefore = true, spaceAfter = true)
         fun eqTail() = WithTailInsertHandler("=", spaceBefore = true, spaceAfter = true) /*TODO: use code style options*/
         fun spaceTail() = WithTailInsertHandler(" ", spaceBefore = false, spaceAfter = false, overwriteText = false)
+        fun colonTail() = WithTailInsertHandler(":", spaceBefore = false, spaceAfter = true)
     }
 }

idea/testData/completion/handlers/keywords/FileKeyword.kt

@@ -0,0 +1 @@
+[fi<caret>]

idea/testData/completion/handlers/keywords/FileKeyword.kt.after

@@ -0,0 +1 @@
+[file: <caret>]

idea/testData/completion/keywords/FileKeyword.kt

@@ -0,0 +1,4 @@
+[<caret>]
+
+// EXIST: file
+// NUMBER: 1

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

@@ -102,6 +102,12 @@ public class KeywordCompletionTestGenerated extends AbstractKeywordCompletionTes
         doTest(fileName);
     }
 
+    @TestMetadata("FileKeyword.kt")
+    public void testFileKeyword() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/keywords/FileKeyword.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("GlobalPropertyAccessors.kt")
     public void testGlobalPropertyAccessors() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/keywords/GlobalPropertyAccessors.kt");

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

@@ -42,6 +42,12 @@ public class KeywordCompletionHandlerTestGenerated extends AbstractKeywordComple
         doTest(fileName);
     }
 
+    @TestMetadata("FileKeyword.kt")
+    public void testFileKeyword() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/handlers/keywords/FileKeyword.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("NoSpaceAfterNull.kt")
     public void testNoSpaceAfterNull() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/handlers/keywords/NoSpaceAfterNull.kt");