From 1285749ae6b78bc6e4ddf26bb8d270b046bf3459 Mon Sep 17 00:00:00 2001
From: "Gregory.Shrago" <gregory.shrago@jetbrains.com>
Date: Fri, 3 Jun 2016 14:43:05 +0300
Subject: [PATCH] IDEA-149628 Slow performance when editing large HTML injected
 in Java: avoid CCE

---
 .../manipulators/StringLiteralManipulator.java     | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/manipulators/StringLiteralManipulator.java b/java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/manipulators/StringLiteralManipulator.java
index b71319b3a6f1..2c793103bf4f 100644
--- a/java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/manipulators/StringLiteralManipulator.java
+++ b/java/java-psi-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/manipulators/StringLiteralManipulator.java
@@ -54,10 +54,16 @@ public class StringLiteralManipulator extends AbstractElementManipulator<PsiLite
   @NotNull
   public static TextRange getValueRange(@NotNull PsiLiteralExpression element) {
     int length = element.getTextLength();
-    IElementType type = ((PsiLiteralExpressionImpl)element).getLiteralElementType();
-    if (type != JavaTokenType.STRING_LITERAL && type != JavaTokenType.CHARACTER_LITERAL) {
-      return TextRange.from(0, length);
+    boolean isQuoted;
+    if (element instanceof PsiLiteralExpressionImpl) {
+      // avoid calling getValue(): it allocates new string, it returns null for invalid escapes
+      IElementType type = ((PsiLiteralExpressionImpl)element).getLiteralElementType();
+      isQuoted = type == JavaTokenType.STRING_LITERAL || type == JavaTokenType.CHARACTER_LITERAL;
     }
-    return new TextRange(1, Math.max(1, length - 1));
+    else {
+      final Object value = element.getValue();
+      isQuoted = value instanceof String || value instanceof Character;
+    }
+    return isQuoted ? new TextRange(1, Math.max(1, length - 1)) : TextRange.from(0, length);
   }
 }