Celll rowspan exceeding total table rows not rendering

[ReinhardJvREx]

Describe the bug
Cells are not rendered if rowspan exceeds available rows in table?

I am trying to add cells to a table that are evenly spaced vertically using rowspan, but I can not seem to get the following to work.
The following works in 1.3.28 but since I have upgraded to version 1.3.36 it no longer renders the cells in the table.

To Reproduce (Kotlin)

val width = document.pageSize.width - 20f
val table = PdfPTable(floatArrayOf(33.3F,33.3F,33.3F))
table.totalWidth = width
table.isLockedWidth = true
table.headerRows = 1

var cell = PdfPCell()
cell.addElement(Phrase("ITEM NO.",bodyFont))
table.addCell(cell)
cell = PdfPCell()
cell.addElement(Phrase("PART",bodyFont))
table.addCell(cell)
cell = PdfPCell()
cell.addElement(Phrase("PROCESS",bodyFont))
table.addCell(cell)

cell = PdfPCell()
cell.rowspan = 6
cell.addElement(Phrase("item 1", bodyFont))
table.addCell(cell)

cell = PdfPCell()
cell.rowspan = 3
cell.minimumHeight = 30f
cell.addElement(Phrase("part 1", bodyFont))
table.addCell(cell)

cell = PdfPCell()
cell.rowspan = 2
cell.minimumHeight = 20f
cell.addElement(Phrase("process 1", bodyFont))
table.addCell(cell)

cell = PdfPCell()
cell.rowspan = 2
cell.minimumHeight = 20f
cell.addElement(Phrase("process 2", bodyFont))
table.addCell(cell)

cell = PdfPCell()
cell.rowspan = 3
cell.minimumHeight = 30f
cell.addElement(Phrase("part 2", bodyFont))
table.addCell(cell)

cell = PdfPCell()
cell.rowspan = 2
cell.minimumHeight = 20f
cell.addElement(Phrase("process 3", bodyFont))
table.addCell(cell)

Current behavior (1.3.36)

Expected behavior (1.3.28)

[andreasrosdal]

These look related: #693 #865 #1019

@fellmann Can you please assist in solving this?

[andreasrosdal]

@ReinhardJvREx Can you please provide a full test-case to reproduce this bug, preferably in Java?

[ReinhardJvREx]

Java Test Case

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.PageSize;
import com.lowagie.text.Phrase;
import com.lowagie.text.pdf.PdfPCell;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.pdf.PdfStream;
import com.lowagie.text.pdf.PdfWriter;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class Test {

    public void generate() {
        try {
            Document document = new Document(PageSize.A4,10,10,10,10);
            File file = new File("test.pdf");
            FileOutputStream fos = new FileOutputStream(file);
            PdfWriter writer = PdfWriter.getInstance(document, fos);

            writer.open();
            writer.setFullCompression();
            writer.setCompressionLevel(PdfStream.BEST_COMPRESSION);
            document.open();

            float width = document.getPageSize().getWidth() - 20;

            float[] columns = { 33.3F, 33.3F, 33.3F };
            PdfPTable table = new PdfPTable(columns);
            table.setTotalWidth(width);
            table.setLockedWidth(true);
            table.setHeaderRows(1);

            PdfPCell cell = new PdfPCell();
            cell.addElement(new Phrase("ITEM NO."));
            table.addCell(cell);
            cell = new PdfPCell();
            cell.addElement(new Phrase("PART"));
            table.addCell(cell);
            cell = new PdfPCell();
            cell.addElement(new Phrase("PROCESS"));
            table.addCell(cell);

            cell = new PdfPCell();
            cell.setRowspan(6);
            cell.addElement(new Phrase("item 1"));
            table.addCell(cell);

            cell = new PdfPCell();
            cell.setRowspan(3);
            cell.setMinimumHeight(30);
            cell.addElement(new Phrase("part 1"));
            table.addCell(cell);

            cell = new PdfPCell();
            cell.setRowspan(2);
            cell.setMinimumHeight(20);
            cell.addElement(new Phrase("process 1"));
            table.addCell(cell);

            cell = new PdfPCell();
            cell.setRowspan(2);
            cell.setMinimumHeight(20);
            cell.addElement(new Phrase("process 2"));
            table.addCell(cell);

            cell = new PdfPCell();
            cell.setRowspan(3);
            cell.setMinimumHeight(30);
            cell.addElement(new Phrase("part 2"));
            table.addCell(cell);

            cell = new PdfPCell();
            cell.setRowspan(2);
            cell.setMinimumHeight(20);
            cell.addElement(new Phrase("process 3"));
            table.addCell(cell);

            document.add(table);

            document.close();
            writer.close();
            fos.close();

        }catch (DocumentException | IOException e){
            System.err.println(e.getMessage());
        }
    }

}

Pdf generated using: 1.3.28
test-1.3.28.pdf

Pdf generated using: 1.3.36
test-1.3.36.pdf

[fellmann]

I think the problem is not the row height calculation, but the fact that it is not called when using locked width.
@ReinhardJvREx Can you confirm the problem is solved when you remove table.setLockedWidth(true);?

[ReinhardJvREx]

@fellmann when removing table.setLockedWidth(true); the problem is solved, with the exception that the table does not span the full width of the page.

Result when removing table.setLockedWidth(true);
test.pdf

[fellmann]

@andreasrosdal luckily, there is an easy fix

[andreasrosdal]

@fellmann Thank you, I am glad you managed to fix this so easily.