ElvisToIfThenIntention - smaller range + minor code improvements

idea/idea-analysis/src/org/jetbrains/kotlin/idea/JetBundle.properties

@@ -243,8 +243,6 @@ unfold.call.to.when.family=Replace Method Call with 'when' Expression
 if.then.to.double.bang=Replace 'if' expression with '!!' expression
 if.then.to.double.bang.replace.exception=Replace 'if' expression with '!!' expression (will remove Exception)
 if.then.to.double.bang.family=Replace 'if' Expression with '!!' Expression
-elvis.to.if.then=Replace elvis expression with 'if' expression
-elvis.to.if.then.family=Replace Elvis Expression with 'if' Expression
 safe.access.to.if.then=Replace safe access expression with 'if' expression
 safe.access.to.if.then.family=Replace Safe Access Expression with 'if' Expression
 merge.when=Merge 'when' expressions

idea/src/org/jetbrains/kotlin/idea/intentions/branchedTransformations/intentions/ElvisToIfThenIntention.kt

@@ -17,7 +17,8 @@
 package org.jetbrains.kotlin.idea.intentions.branchedTransformations.intentions
 
 import com.intellij.openapi.editor.Editor
-import org.jetbrains.kotlin.idea.intentions.JetSelfTargetingOffsetIndependentIntention
+import com.intellij.openapi.util.TextRange
+import org.jetbrains.kotlin.idea.intentions.JetSelfTargetingRangeIntention
 import org.jetbrains.kotlin.idea.intentions.branchedTransformations.convertToIfNotNullExpression
 import org.jetbrains.kotlin.idea.intentions.branchedTransformations.introduceValueForCondition
 import org.jetbrains.kotlin.idea.intentions.branchedTransformations.isStableVariable
@@ -25,13 +26,17 @@ import org.jetbrains.kotlin.lexer.JetTokens
 import org.jetbrains.kotlin.psi.JetBinaryExpression
 import org.jetbrains.kotlin.psi.JetPsiUtil
 
-public class ElvisToIfThenIntention : JetSelfTargetingOffsetIndependentIntention<JetBinaryExpression>("elvis.to.if.then", javaClass()) {
-    override fun isApplicableTo(element: JetBinaryExpression): Boolean =
-            element.getOperationToken() == JetTokens.ELVIS
+public class ElvisToIfThenIntention : JetSelfTargetingRangeIntention<JetBinaryExpression>(javaClass(), "Replace elvis expression with 'if' expression") {
+    override fun applicabilityRange(element: JetBinaryExpression): TextRange? {
+        return if (element.getOperationToken() == JetTokens.ELVIS && element.getLeft() != null && element.getRight() != null)
+            element.getOperationReference().getTextRange()
+        else
+            null
+    }
 
     override fun applyTo(element: JetBinaryExpression, editor: Editor) {
-        val left = checkNotNull(JetPsiUtil.deparenthesize(element.getLeft()), "Left hand side of elvis expression cannot be null")
-        val right = checkNotNull(JetPsiUtil.deparenthesize(element.getRight()), "Right hand side of elvis expression cannot be null")
+        val left = JetPsiUtil.safeDeparenthesize(element.getLeft()!!)
+        val right = JetPsiUtil.safeDeparenthesize(element.getRight()!!)
 
         val leftIsStable = left.isStableVariable()
 

idea/testData/intentions/branched/elvisToIfThen/callExpression.kt

@@ -6,5 +6,5 @@ fun bar() {
 }
 
 fun main(args: Array<String>) {
-    foo() ?: <caret>bar()
+    foo() ?:<caret> bar()
 }

idea/testData/intentions/branched/elvisToIfThen/callExpressionParens.kt

@@ -6,5 +6,5 @@ fun bar() {
 }
 
 fun main(args: Array<String>) {
-    (foo()) ?: <caret>bar()
+    (foo()) ?:<caret> bar()
 }

idea/testData/intentions/branched/elvisToIfThen/simpleNameExpression.kt

@@ -1,5 +1,5 @@
 fun main(args: Array<String>) {
     val foo: String? = "foo"
     var bar = "bar"
-    foo ?: <caret>bar
+    foo ?:<caret> bar
 }

idea/testData/intentions/branched/elvisToIfThen/simpleNameExpressionInParens.kt

@@ -2,5 +2,5 @@ fun bar(): String = "bar"
 
 fun main(args: Array<String>) {
     val foo: String? = "foo"
-    (foo) ?: <caret>bar()
+    (foo) ?:<caret> bar()
 }