IDEA-109893 Formatting of LONG strings in comments

java/java-tests/testSrc/com/intellij/psi/formatter/java/JavadocFormatterTest.java

@@ -605,4 +605,17 @@ public class JavadocFormatterTest extends AbstractJavaFormatterTest {
 
     doTextTest(before, after);
   }
+
+  public void testDoNotWrapLongLineCommentWithSpaceInStart() throws Exception {
+    getSettings().KEEP_FIRST_COLUMN_COMMENT = true;
+    getSettings().WRAP_LONG_LINES = true;
+    getSettings().getRootSettings().RIGHT_MARGIN = 200;
+    String before = "public class JiraIssue {\n" +
+                    "\n" +
+                    "    public static void main(String[] args) {\n" +
+                    "// AAAMIIGgIBADANBgkqhkiG9w0BAQEFAASCBugwgsdfssdflkldkflskdfsdkfjskdlfjdskjfksdjfksdjfkjsdkfjsdkfjgbkAgEAAoIBgQCZfKds4XjFWIU8D4OqCYJ0TkAkKPVV96v2l6PuMBNbON3ndHCVvwoJOJnopfbtFro9eCTCUC9MlAUZBAVdCbPVi3ioqaEN\n" +
+                    "    }\n" +
+                    "}";
+    doTextTest(before, before);
+  }
 }

platform/lang-impl/src/com/intellij/psi/impl/source/codeStyle/CodeFormatterFacade.java

@@ -491,9 +491,17 @@ public class CodeFormatterFacade {
       editor.getCaretModel().moveToOffset(wrapOffset);
       emulateEnter(editor, project, shifts);
 
-      // We know that number of lines is just increased, hence, update the data accordingly.
-      maxLine += shifts[0];
-      endOffsetToUse += shifts[1];
+      //If number of inserted symbols on new line after wrapping more or equal then symbols left on previous line
+      //there was no point to wrapping it, so reverting to before wrapping version
+      if (shifts[1] - 1 >= wrapOffset - startLineOffset) {
+        document.deleteString(wrapOffset, wrapOffset + shifts[1]);
+      }
+      else {
+        // We know that number of lines is just increased, hence, update the data accordingly.
+        maxLine += shifts[0];
+        endOffsetToUse += shifts[1];
+      }
+
     }
   }
 
@@ -504,7 +512,7 @@ public class CodeFormatterFacade {
    * @param project      target project
    * @param shifts       two-elements array which is expected to be filled with the following info:
    *                       1. The first element holds added lines number;
-   *                       2. The second element holds added symbols number;  
+   *                       2. The second element holds added symbols number;
    */
   private static void emulateEnter(@NotNull final Editor editor, @NotNull Project project, int[] shifts) {
     final DataContext dataContext = prepareContext(editor.getComponent(), project);