From 926b28246fb85ae14c983af7d323f63d37bab86a Mon Sep 17 00:00:00 2001
From: Maxim Kropotov <maxim.kropotov@jetbrains.com>
Date: Thu, 16 Feb 2017 15:42:18 +0300
Subject: [PATCH] js multiline string literals consider '\n' escape sequence to
 be equivalent to actual newline. When formatting injection, allow formatter
 to consider it same whitespace. Fixes WEB-25477

---
 .../intellij/psi/formatter/FormattingDocumentModelImpl.java  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/platform/lang-impl/src/com/intellij/psi/formatter/FormattingDocumentModelImpl.java b/platform/lang-impl/src/com/intellij/psi/formatter/FormattingDocumentModelImpl.java
index fd9c386be05d..99f7a4055148 100644
--- a/platform/lang-impl/src/com/intellij/psi/formatter/FormattingDocumentModelImpl.java
+++ b/platform/lang-impl/src/com/intellij/psi/formatter/FormattingDocumentModelImpl.java
@@ -141,6 +141,11 @@ public class FormattingDocumentModelImpl implements FormattingDocumentModel {
       if (!injectedLanguage.equals(myFile.getLanguage())) {
         WhiteSpaceFormattingStrategy localStrategy = WhiteSpaceFormattingStrategyFactory.getStrategy(injectedLanguage);
         if (localStrategy != null) {
+          String unescapedText = InjectedLanguageUtil.getUnescapedLeafText(injectedElement, true);
+          if (unescapedText != null) {
+            return localStrategy.check(unescapedText, 0, unescapedText.length()) >= unescapedText.length();
+          }
+
           return localStrategy.check(myDocument.getCharsSequence(), startOffset, endOffset) >= endOffset;
         }
       }