iText7选项卡，右对齐文本

Question

我可以看到，当文本左对齐时，iText7将正确呈现标签，但对于右对齐文本，标签认为文本左对齐并呈现为文本左对齐。

有没有人知道这是由于我缺少的东西引起的问题还是iText7中的限制/错误？

更新

@Test
public void shouldTabFromTheRightWhenTextAlignIsFromTheRight() throws IOException, InterruptedException {
    String outFileName = destinationFolder + "tabRightAlignedTextTest.pdf";
    String cmpFileName = sourceFolder + "cmp_tabRightAlignedTextTest.pdf";

    FileOutputStream file = new FileOutputStream(outFileName);
    PdfWriter writer = new PdfWriter(file);
    PdfDocument pdfDoc = new PdfDocument(writer);
    Document doc = new Document(pdfDoc);

    Paragraph p = new Paragraph();
    p.setFontColor(Color.GREEN);
    p.setTextAlignment(TextAlignment.RIGHT);
    p.add(new Text("text out of page"));
    p.add(new Tab());
    p.add(new Text(" bounds after right tab stop:"));
    doc.add(p);

    p = new Paragraph();
    p.setFontColor(Color.GREEN);
    p.setTextAlignment(TextAlignment.RIGHT);
    p.add(new Text("text out of"));
    p.add(new Tab());
    p.add(new Text(" page bounds after right tab stop:"));
    doc.add(p);

    p = new Paragraph();
    p.setFontColor(Color.GREEN);
    p.add(new Text("text out of page"));
    p.add(new Tab());
    p.add(new Text(" bounds after right tab stop:"));
    doc.add(p);

    p = new Paragraph();
    p.setFontColor(Color.GREEN);
    p.add(new Text("text out of"));
    p.add(new Tab());
    p.add(new Text(" page bounds after right tab stop:"));
    doc.add(p);

    doc.close();

    Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder, "diff"));
}