private boolean paintPlaceholderText(Graphics2D g) {
    CharSequence hintText = myEditor.getPlaceholder();
    EditorComponentImpl editorComponent = myEditor.getContentComponent();
    if (myDocument.getTextLength() > 0
        || hintText == null
        || hintText.length() == 0
        || KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner() == editorComponent
            && !myEditor.getShowPlaceholderWhenFocused()) {
      return false;
    }

    hintText =
        SwingUtilities.layoutCompoundLabel(
            g.getFontMetrics(),
            hintText.toString(),
            null,
            0,
            0,
            0,
            0,
            editorComponent.getBounds(),
            new Rectangle(),
            new Rectangle(),
            0);
    g.setColor(myEditor.getFoldingModel().getPlaceholderAttributes().getForegroundColor());
    g.setFont(myEditor.getColorsScheme().getFont(EditorFontType.PLAIN));
    g.drawString(hintText.toString(), 0, myView.getAscent());
    return true;
  }
  private boolean getStringToReplace(
      int textOffset,
      int textEndOffset,
      Document document,
      FindModel findModel,
      Ref<String> stringToReplace)
      throws FindManager.MalformedReplacementStringException {
    if (textOffset < 0 || textOffset >= document.getTextLength()) {
      return false;
    }
    if (textEndOffset < 0 || textOffset > document.getTextLength()) {
      return false;
    }
    FindManager findManager = FindManager.getInstance(myProject);
    final CharSequence foundString =
        document.getCharsSequence().subSequence(textOffset, textEndOffset);
    PsiFile file = PsiDocumentManager.getInstance(myProject).getPsiFile(document);
    FindResult findResult =
        findManager.findString(
            document.getCharsSequence(),
            textOffset,
            findModel,
            file != null ? file.getVirtualFile() : null);
    if (!findResult.isStringFound()) {
      return false;
    }

    stringToReplace.set(
        FindManager.getInstance(myProject)
            .getStringToReplace(foundString.toString(), findModel, textOffset, document.getText()));

    return true;
  }
 @Override
 public void setText(@NotNull CharSequence text) {
   String s = StringUtil.convertLineSeparators(text.toString());
   myChars = new char[s.length()];
   s.getChars(0, s.length(), myChars, 0);
   myString = new String(myChars);
   myLineSet = LineSet.createLineSet(myString);
 }