private void initGuardedBlocks(Place shreds) {
   int origOffset = -1;
   int curOffset = 0;
   for (PsiLanguageInjectionHost.Shred shred : shreds) {
     Segment hostRangeMarker = shred.getHostRangeMarker();
     int start = shred.getRange().getStartOffset() + shred.getPrefix().length();
     int end = shred.getRange().getEndOffset() - shred.getSuffix().length();
     if (curOffset < start) {
       RangeMarker guard = myNewDocument.createGuardedBlock(curOffset, start);
       if (curOffset == 0 && shred == shreds.get(0)) guard.setGreedyToLeft(true);
       String padding =
           origOffset < 0
               ? ""
               : myOrigDocument.getText().substring(origOffset, hostRangeMarker.getStartOffset());
       guard.putUserData(REPLACEMENT_KEY, fixQuotes(padding));
     }
     curOffset = end;
     origOffset = hostRangeMarker.getEndOffset();
   }
   if (curOffset < myNewDocument.getTextLength()) {
     RangeMarker guard =
         myNewDocument.createGuardedBlock(curOffset, myNewDocument.getTextLength());
     guard.setGreedyToRight(true);
     guard.putUserData(REPLACEMENT_KEY, "");
   }
 }
  private void altCommitToOriginal(@NotNull DocumentEvent e) {
    final PsiFile origPsiFile =
        PsiDocumentManager.getInstance(myProject).getPsiFile(myOrigDocument);
    String newText = myNewDocument.getText();
    // prepare guarded blocks
    LinkedHashMap<String, String> replacementMap = new LinkedHashMap<String, String>();
    int count = 0;
    for (RangeMarker o : ContainerUtil.reverse(((DocumentEx) myNewDocument).getGuardedBlocks())) {
      String replacement = o.getUserData(REPLACEMENT_KEY);
      String tempText = "REPLACE" + (count++) + Long.toHexString(StringHash.calc(replacement));
      newText =
          newText.substring(0, o.getStartOffset()) + tempText + newText.substring(o.getEndOffset());
      replacementMap.put(tempText, replacement);
    }
    // run preformat processors
    final int hostStartOffset = myAltFullRange.getStartOffset();
    myEditor.getCaretModel().moveToOffset(hostStartOffset);
    for (CopyPastePreProcessor preProcessor :
        Extensions.getExtensions(CopyPastePreProcessor.EP_NAME)) {
      newText = preProcessor.preprocessOnPaste(myProject, origPsiFile, myEditor, newText, null);
    }
    myOrigDocument.replaceString(hostStartOffset, myAltFullRange.getEndOffset(), newText);
    // replace temp strings for guarded blocks
    for (String tempText : replacementMap.keySet()) {
      int idx =
          CharArrayUtil.indexOf(
              myOrigDocument.getCharsSequence(),
              tempText,
              hostStartOffset,
              myAltFullRange.getEndOffset());
      myOrigDocument.replaceString(idx, idx + tempText.length(), replacementMap.get(tempText));
    }
    // JAVA: fix occasional char literal concatenation
    fixDocumentQuotes(myOrigDocument, hostStartOffset - 1);
    fixDocumentQuotes(myOrigDocument, myAltFullRange.getEndOffset());

    // reformat
    PsiDocumentManager.getInstance(myProject).commitDocument(myOrigDocument);
    Runnable task =
        () -> {
          try {
            CodeStyleManager.getInstance(myProject)
                .reformatRange(origPsiFile, hostStartOffset, myAltFullRange.getEndOffset(), true);
          } catch (IncorrectOperationException e1) {
            // LOG.error(e);
          }
        };
    DocumentUtil.executeInBulk(myOrigDocument, true, task);

    PsiElement newInjected =
        InjectedLanguageManager.getInstance(myProject)
            .findInjectedElementAt(origPsiFile, hostStartOffset);
    DocumentWindow documentWindow =
        newInjected == null ? null : InjectedLanguageUtil.getDocumentWindow(newInjected);
    if (documentWindow != null) {
      myEditor.getCaretModel().moveToOffset(documentWindow.injectedToHost(e.getOffset()));
      myEditor.getScrollingModel().scrollToCaret(ScrollType.MAKE_VISIBLE);
    }
  }
 private void commitToOriginalInner() {
   final String text = myNewDocument.getText();
   final Map<
           PsiLanguageInjectionHost,
           Set<Trinity<RangeMarker, RangeMarker, SmartPsiElementPointer>>>
       map =
           ContainerUtil.classify(
               myMarkers.iterator(),
               new Convertor<
                   Trinity<RangeMarker, RangeMarker, SmartPsiElementPointer>,
                   PsiLanguageInjectionHost>() {
                 @Override
                 public PsiLanguageInjectionHost convert(
                     final Trinity<RangeMarker, RangeMarker, SmartPsiElementPointer> o) {
                   final PsiElement element = o.third.getElement();
                   return (PsiLanguageInjectionHost) element;
                 }
               });
   PsiDocumentManager documentManager = PsiDocumentManager.getInstance(myProject);
   documentManager.commitDocument(myOrigDocument); // commit here and after each manipulator update
   int localInsideFileCursor = 0;
   for (PsiLanguageInjectionHost host : map.keySet()) {
     if (host == null) continue;
     String hostText = host.getText();
     ProperTextRange insideHost = null;
     StringBuilder sb = new StringBuilder();
     for (Trinity<RangeMarker, RangeMarker, SmartPsiElementPointer> entry : map.get(host)) {
       RangeMarker origMarker = entry.first; // check for validity?
       int hostOffset = host.getTextRange().getStartOffset();
       ProperTextRange localInsideHost =
           new ProperTextRange(
               origMarker.getStartOffset() - hostOffset, origMarker.getEndOffset() - hostOffset);
       RangeMarker rangeMarker = entry.second;
       ProperTextRange localInsideFile =
           new ProperTextRange(
               Math.max(localInsideFileCursor, rangeMarker.getStartOffset()),
               rangeMarker.getEndOffset());
       if (insideHost != null) {
         // append unchanged inter-markers fragment
         sb.append(
             hostText.substring(insideHost.getEndOffset(), localInsideHost.getStartOffset()));
       }
       sb.append(
           localInsideFile.getEndOffset() <= text.length() && !localInsideFile.isEmpty()
               ? localInsideFile.substring(text)
               : "");
       localInsideFileCursor = localInsideFile.getEndOffset();
       insideHost = insideHost == null ? localInsideHost : insideHost.union(localInsideHost);
     }
     assert insideHost != null;
     ElementManipulators.getManipulator(host).handleContentChange(host, insideHost, sb.toString());
     documentManager.commitDocument(myOrigDocument);
   }
 }