KT-13693 Expand selection for array brackets

#KT-13693 Fixed

idea/src/META-INF/plugin.xml

@@ -510,6 +510,7 @@
     <extendWordSelectionHandler implementation="org.jetbrains.kotlin.idea.editor.wordSelection.KotlinInvokedExpressionSelectioner"/>
     <extendWordSelectionHandler implementation="org.jetbrains.kotlin.idea.editor.wordSelection.KotlinTypeSelectioner"/>
     <extendWordSelectionHandler implementation="org.jetbrains.kotlin.idea.editor.wordSelection.KotlinSuperTypeSelectioner"/>
+    <extendWordSelectionHandler implementation="org.jetbrains.kotlin.idea.editor.wordSelection.KotlinBracketsSelectioner"/>
     <basicWordSelectionFilter implementation="org.jetbrains.kotlin.idea.editor.wordSelection.KotlinWordSelectionFilter"/>
 
     <typedHandler implementation="org.jetbrains.kotlin.idea.editor.KotlinTypedHandler"/>

idea/src/org/jetbrains/kotlin/idea/editor/wordSelection/KotlinBracketsSelectioner.kt

@@ -0,0 +1,28 @@
+/*
+ * 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.wordSelection
+
+import com.intellij.codeInsight.editorActions.ExtendWordSelectionHandlerBase
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.KtNodeTypes
+import org.jetbrains.kotlin.psi.KtContainerNode
+
+class KotlinBracketsSelectioner : ExtendWordSelectionHandlerBase() {
+    override fun canSelect(e: PsiElement?): Boolean {
+        return e is KtContainerNode && e.node.elementType == KtNodeTypes.INDICES
+    }
+}

idea/testData/wordSelection/ArrayBrackets/0.kt

@@ -0,0 +1,4 @@
+fun test() {
+    val a = arrayOf(arrayOf(1))
+    a[1][2<caret>]
+}

idea/testData/wordSelection/ArrayBrackets/1.kt

@@ -0,0 +1,4 @@
+fun test() {
+    val a = arrayOf(arrayOf(1))
+    a[1][<selection>2<caret></selection>]
+}

idea/testData/wordSelection/ArrayBrackets/2.kt

@@ -0,0 +1,4 @@
+fun test() {
+    val a = arrayOf(arrayOf(1))
+    a[1]<selection>[2<caret>]</selection>
+}

idea/testData/wordSelection/ArrayBrackets/3.kt

@@ -0,0 +1,4 @@
+fun test() {
+    val a = arrayOf(arrayOf(1))
+    <selection>a[1][2<caret>]</selection>
+}

idea/tests/org/jetbrains/kotlin/idea/WordSelectionTest.java

@@ -100,6 +100,10 @@ public class WordSelectionTest extends KotlinLightCodeInsightFixtureTestCase {
         doTest();
     }
 
+    public void testArrayBrackets() {
+        doTest();
+    }
+
     private void doTest() {
         String dirName = getTestName(false);