raw string literals: keep multiple tics at start pos sync with closing

IDEA-CR-31851

java/java-impl/src/com/intellij/codeInsight/editorActions/JavaQuoteHandler.java

@@ -100,16 +100,23 @@ public class JavaQuoteHandler extends SimpleTokenSetQuoteHandler implements Java
   @Nullable
   @Override
   public CharSequence getClosingQuote(HighlighterIterator iterator, int offset) {
-    if (isOpeningQuote(iterator, offset - 1) && iterator.getTokenType() == JavaTokenType.RAW_STRING_LITERAL) {
-      return " `";
+    if (iterator.getTokenType() == JavaTokenType.RAW_STRING_LITERAL) {
+      CharSequence text = iterator.getDocument().getImmutableCharSequence();
+      int leadingTicsSequence = PsiRawStringLiteralUtil.getLeadingTicsSequence(text.subSequence(iterator.getStart(), offset));
+      if (isOpeningQuote(iterator, offset - leadingTicsSequence)) {
+        int closingSequence = PsiRawStringLiteralUtil.getLeadingTicsSequence(text.subSequence(offset, iterator.getEnd()));
+        if (closingSequence + 1 == leadingTicsSequence) {
+          return "`";
+        }
+      }
     }
     return null;
   }
 
   @Override
-  public void insertString(Editor editor, int offset, CharSequence closingQuote) {
-    MultiCharQuoteHandler.super.insertString(editor, offset, closingQuote);
-    editor.getSelectionModel().setSelection(offset, offset + closingQuote.length() - 1);
+  public void insertClosingQuote(Editor editor, int offset, CharSequence closingQuote) {
+    editor.getDocument().insertString(offset, " " + closingQuote);
+    editor.getSelectionModel().setSelection(offset, offset + 1);
   }
 
   public static boolean isAppropriateElementTypeForLiteralStatic(final IElementType tokenType) {

java/java-psi-api/src/com/intellij/psi/PsiRawStringLiteralUtil.java

@@ -30,20 +30,20 @@ public class PsiRawStringLiteralUtil {
   /**
    * Return number of leading tics in the <code>text</code>
    */
-  public static int getLeadingTicsSequence(String text) {
+  public static int getLeadingTicsSequence(CharSequence text) {
     return getTicsSequence(text, text.length(), 0);
   }
 
   /**
    * Return number of trailing tics in the <code>text</code>
    */
-  public static int getTrailingTicsSequence(String text) {
+  public static int getTrailingTicsSequence(CharSequence text) {
     int length = text.length();
     while (length > 0 && text.charAt(length - 1) == '`') length--;
     return text.length() - length;
   }
 
-  private static int getTicsSequence(String literalText, int length, int startIndex) {
+  private static int getTicsSequence(CharSequence literalText, int length, int startIndex) {
     int quotesLength = startIndex;
     while (quotesLength < length && literalText.charAt(quotesLength) == '`') quotesLength++;
     return quotesLength - startIndex;

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advRawStringLiteral/TypingOpeningTic.1.after.java

@@ -0,0 +1,5 @@
+class A {
+  {
+    String s = ``<selection> </selection>``
+  }
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/LightAdvRawStringLiteralsTest.java

@@ -94,6 +94,8 @@ public class LightAdvRawStringLiteralsTest extends LightCodeInsightFixtureTestCa
     myFixture.configureByFile(getTestName(false ) + ".java");
     myFixture.type('`');
     myFixture.checkResultByFile(getTestName(false) + ".after.java");
+    myFixture.type('`');
+    myFixture.checkResultByFile(getTestName(false) + ".1.after.java");
   }
 
   private void doTestHighlighting() {